Mon, 25 Jan 2010 02:10:13 +0000

We’re going to give this the old “college” try.

–

The kick-off is delayed due to complication with the McDiarmid Park flood lights.

Scotland boss Craig Levein is in the house.

–

Celtic starting eleven:
Boruc
Hinkel, Loovens, Thompson, O’Dea
McGinn, Crosas, Zhi, McGeady
Samaras, Fortune

–
‘3
Zheng Zhi scuffs his opening try, but he had good space to give it a try.

–
‘4
Glen Loovens needs to grow a few more inches in height. Hopefully the two new defensive signings – Hooiveld and Rogne - both 6′3” and some will offer a little more defense from aerial threats.

Josh Thompson has early cold feet.

–

This is St. Johnstone’s first league match since St. Stephen’s Day, a 1-3 won over Motherwell. Their only other fixture was a nil-3 Scottish cup win against

–
‘11

Penalty for St. Johnstone! Loovens again is looking horrid in back.

I knew this live-blog idea was stupid…

Liam Craig nets and St. Johnstone, wrong-footing Boruc to the left, Craig goes right.

St. Johnstone 1 – 0 Celtic

–
‘14

Did that not go in??

Zheng Zhi picked up a loose ball and fired a shot from near 5 out, looked to have gone in, but apparently cleared off the line.

The last of the ball didn’t roll over the line…

Zheng Zhi is showing a load of life, at least.

–
‘17

Free kick to St. Johnstone, but directed aside.

Celtic on the backfoot in more than two ways.

–
‘18

Crosas and McGeady link up on the left flank, a handy little piece, only to be cut down by a center-back. I’ve seen this move before.

–
‘20

Loovens connects with the back of the opposition on a free header. Loovens is off and Celtic are temporarily reduced to ten men.

Samaras is calling for an immediate sub. In truth, Celtic don’t need another injury (10, maybe 11 in all now)

Paul Caddis is on for Loovens

Loovens in a stretcher. “A sorry sight” indeed.

–
‘25

Darren O’Dea actually showing a bit of quality defense. His return to Celtic Park has been hailed with mixed reviews, having not had an overly successful loan spell at Reading, but his composure is there.

–
‘28

Fortune brought down after a decent run, but the free kick is no given. I’d like to see him run up that side and find Samaras streaking in behind him down the middle of the box.

–
‘29

Celtic Corner! Set up by Hinkel, McGinn tracks the ball down to the corner flag, shows a bit of shake, off St. Johnstone.

–
‘31

Opportunity to level as Samaras was streaking to the far post, but McGinn decided to try hero and blast into the stands.

Could have been a real chance.

–
‘33

Again, McGinn opted not to pass out and shuffle about the box. What is the offensive direction for him?

–
‘35

On the sidelines, Loovens is getting a stitching.

–
‘37

The McGeady shuffle up the left, only to be taken down again. It’s like watching Little Ronald up the park for Milan; always cut down to his wanton surprise

Now a free-kick, which was well handled by St. Johnstone defense.

–
‘39

I feel like I just typed this. McGeady cut down on his run, and finally a booking, perhaps a cumulative yellow for “professionally” cutting down the Celtic winger.

–
‘42

A nice seeking ball to Samaras, alone in the box. Just a bit much on the delivery. This might work later in the match when St. Johnstone defenders are sucking their wind.

–
‘44

Shot from McGinn. Like Zhi’s from the beginning of the match, a loose ball picked out by McGinn, who thunders it over the crossbar.

McGinn is trying to influence my halftime comments, perhaps.

–
‘45 + Injury

Thompson just bombs one over the right hand side, beating both defenders, picked up by McGinn, whose delivery, presumably to Fortune, is sided-out.

–

‘45 + Injury

Another Celtic chance, again McGinn on goal, a composed strike in the box on the right, which Smith, the St. Johnstone keeper, has to show a bit of class and more so luck. Unlucky for Celtic is starting to become unfortunate and really un… good. Celtic could have two on the half, and yet they have none.

–

Halftime whistle.

Celtic realized they were playing a match after they went down a penalty.

And while you don’t speak ill of the dead (or injured), Loovens was not playing well at all, and the penalty feel on his clumsiness in the back. Perhaps Paul Caddis (BBC said he was injured, but I couldn’t find anything on this phantom injury) will put in a shift and offer Mowbray with an option in the back. Or these new signings will find their match/Celtic fitness and become instant installments to the first team.

Zheng Zhi’s shot still doesn’t look to have completely crossed the line. He put in a great opening ten minutes, but I didn’t see him as a part of the later opportunities. I, like he most likely, wonder where he’s supposed to be in the midfield.

At the same time, this match for Celtic offsensive discovery has been on the wings. Aiden McGeady clever on the left, only to get hacked down a handful of times, or from Hinkel or Thompson overtop the St. Johnstone defense, who are loosing a step to McGinn every time. As for McGinn, I think he’s playing well to a degree, and he’s trying to make up for not scoring at Morton last Tuesday. He’s not the smartest player on the pitch, but his instincts are on goal, and maybe he’ll catch the break he wasn’t afforded in the first half.

Fortune and Samaras are not receving much from the middle, or the deliveries from the wing are getting deflected or cut out too easily. I don’t see Celtic scoring from a corner, but then again, I’d love to be proven wrong.

For me, the need to keep attack the wings and get a good run to the backline, find Samaras streaking through the middle, which he’s done well to do so far this match, get level, and then pray on the lack of matches St. Johnstone have had. Once they are panting for breath, Celtic may just open this match up and go ahead.

At least, that would be the run of play.

–

Second Half

‘45

Fortune is brought down about the box and the official gives no penalty. I’ll have to see that again (and stop flapping my gum in a first half report.

St. Johnstone’s Gartland is sent off, again for a “professional” foul. The booking gets him put away.

–

I wonder whom Craig Levein is here to see from St. Johnstone? Because the lot of Celtic starting eleven are out and out.

–

‘53

McGinn is cut down, trying to get it up to Fortune. Should have been a booking

–
‘54

AHHH! McGeady can’t finish again. McGeady, into Fortune, who takes it to the line, a brilliant cut back to an open steaking McGeady and he skies it.

–
‘56

AHHH! The exact same play, but McGinn to Samaras, and clear out by SJ’s Miller. Samaras is either the most unlucky man on the pitch or just not in it to win it.

–

I can’t keep up with the Celtic opportunities, but they’re not going in the net.

If a Celtic opportunity happens in the woods and noone is their to finish it off (or able to finish it off), does it actually happen.

–

‘60

McGeady now streaking up the right handside. A good bit of defending brings him down.

–

SUBSTITUTIONS:

Paddy McCourt on for Hinkel, to beef up the offense.

Paul McGowan on for Zhi, who has been invisable for the last thirty minutes.

–
‘61
Samaras could have received a booking for getting in keeper Smith’s kick…

–
‘63

CELTIC GOAL!!! Fortune!!

The same strike that delivered Celtic over Motherwell!!

Equal score. Celtic on the front foot!

–

‘66

Caddis with a good effort on goal, a good save from Smith. The Celtic defender had snuck in around the back. I like this thinking of pushing up on the left, and move McGeady a bit into the middle of even on the right. Let the man move about!

–
‘68

McCourt brought down right outside the box right in front of the referee, and not a flinch.

–
‘69
McCourt shuffles into the box, again. He’s got dancer’s feet.

–

‘73

Shoot by McGeady, bounces off Smith, and to the feet of Darren O’Dea, who is unprepared to play it in the net. This is at best unnerving.

–

‘74

McGeady’s cross into Fortune is just cut out. If not, a sure goal.

–

‘75

McCourt is grand, but Smith is having the game of his life.

–
‘76

CELTIC GOAL!!

SAMARAS on the volley, a magnificient strike, low and brilliant!! Smith had no help from his defenders, no one in the way of the Greek, and he buries it. Smith hads are up in protest to his own lack of defensive aid!

St. Johnstone 1
Celtic 2

–

In other new, the mysteriously free live internet feed is brought to me by scientology.org. Who knew the Hollywood crazies liked the footie.

–
‘78
Celtic had a tremendous 3 on 2, but the opportunity is squandered.

–

‘80

CELTIC GOAL!! Fortune grabs the ricochet and slides past the face of goal to find the far right side netting!!

The score line has finally caught up with the run of play:

St. Johnstone 1
Celtic 3

–
‘82

McCourt is unlucky no to be on the scorer’s sheet, and St. Johnstone are being run ragged. A brilliant piece of one-two. Celtic are taking full advantage of their one-man advantage.

–

‘85

First time I’ve heard Liam Craig’s name in about an hour. The man’s class, but under-supported.

–

‘86

CELTIC GOAL!! PADDY MCCOURT lifts the ball into the open area in front of the box, right-footed brilliance, curls the ball just enough to dink the post and into the back of the net!!

St. Johnstone 1
Celtic 4

–
Injury Time

Ambitious volley – Niall McGinn from 25 out. A rye smile accompanies.

I think McGeady is low-balling his scoring, just to stay off the bids from England and stay at Celtic Park.

A blogger can dream, I suppose.

–

Full Time whistle

St. Johnstone 1
Celtic 4

Mine belt conveyor to run the new experience
Yanzhou Mining (Group) Company of Mine Belt Conveyor Run has accumulated a number of effective experience in this to make a brief introduction.

    A belt conveyor running resistance and friction coefficient of on-site determination

    Different design staff with a belt conveyor calculations may be different, one of the most critical parameter is to run the drag coefficient and friction coefficient values. In the mine production system, the belt conveyor running drag coefficient and friction coefficient changes with the environmental conditions change. Therefore, the site of the actual measurement results and found in the data from the manual has a large difference, which resulted in the selection of the parameters of conventional computing arbitrary large. In order to accurately grasp of these two parameters, Yanzhou Mining (Group) Company Xinglongzhuang on how to conduct on-site measurement and technologies for the study.

    The study hypothesis-driven roller shaft power into traction to overcome all the running resistance; tape friction drive for the ideal body, does not take into account the changes brought about friction and heat.

    Determination of coefficient of running resistance theory: The belt conveyor when the motor is running no-load input power were measured, called the input current method. The use of a single motor-driven belt conveyor-load operation, measured motor power, the calculated shaft power (for example, can be measured motor efficiency, speed reducer efficiency and coupling efficiency, calculated accurately, on-site in accordance with the general experience of value) , according to shaft power, traction and the running resistance of the relationship between the drag coefficient can be calculated to run.

    Roller conveyor and transmission coefficient of friction between the determination of principle: use of critical sliding friction test method were determined. No-load placed on the conveyor belt running (for ease of measurement of electrical parameters, multi-drive unit of the belt conveyor is best to open a single motor, electric motor being torn off and the rest) to control power to the drive pulley tensioning incipient skid, the record pull on the rope taut reading (tensioning device according to different specific conditions), and then a slight tension to the non-slip state, record the time pulling the same time measure motor power. Test at least three times, calculate the tension and power, on average, calculate the driving tension roller separation point, in accordance with the conditions of non-skid driving principle to calculate the friction coefficient of friction.

    So far, mine have used this method to complete a 7 belt conveyor extension and four belt conveyor growth, results are quite remarkable.

    2 reduce the belt conveyor means working resistance

    Yanzhou Mining (Group) Company of Jining II coal mine belt conveyor carried out the operation on the lessons learned, that the use of high precision and high-performance tape roller is conducive to reducing the conveyor working resistance.

    Studies have shown that resistance and conveyor idler rotating forward resistance accounted for the major resistance of conveyor belt 50% ~ 85%. In the captain of more than 80m of the belt conveyor formula for calculating the total resistance, total resistance being such as the length of the selected in accordance with conveyor loading factor, and installation of the situation and working conditions of simulated friction coefficient, conveyor length of the roller bearing units of the branch length of the rotating part of the quality of the return idler branches per unit length of the rotating part of the quality of conveyor unit mass, transportation of materials per unit mass (with the belt conveyor transport capability, material bulk density, and belt speed related), specialty friction roller forward the main resistance and friction tape cleaning device special additional parameters such as impact resistance. Among them, roller bearing branches per unit length of the rotating part of the quality of the return idler branches per unit length rotating part of the quality and the conveyor belt transport unit mass is a major obstacle, should give full consideration to the selected roller rotating conveyor belt sag resistance and resistance, tape in order to more accurately calculate the running resistance.

    Practice has proved that narrow the distance between rollers simulate the friction coefficient can be reduced, but the resistance value will increase, in addition to the tipping point for the protection of the general external tape roller bearing segment will not increase the density. In contrast, overseas usually take the increase in distance between rollers to reduce the resistance value, but the design and installation should be to fully dynamic analysis and high-quality roller-based conveyor belt in order to ensure reliable operation.

    North Wing Chi underground mine belt conveyor using the 35 ° slot angle forward-biased roller group and the parallel under the roller group, V-shaped roller under the group, tape is covered with plastic 8mm, under the plastic cover 6mm, the bandwidth of the wire rope 1200mm core conveyor belt, the intensity 2000N/mm. High-performance roller bearings and seals, effectively reducing the roller rotating resistance; two sets of roller distance 1.5m, a good supporting the conveyor belt, so that conveyor belt sag of no more than limited value in order to reduce the resistance; tape core plastic and the use of flame-retardant plastic face of new materials, both good and also reducing the tape into the groove of sag resistance.

    3 mine conveyor belt injury causes and prevention of

    At present, the belt conveyor has been widely used in the mining industry. Conveyor belt is traction components, but also bearing components, occupies an important position in the belt conveyor, belt conveyor about the value of the value of 1 / 3. More recently, in the Shandong Yanzhou Coal Mining Co., where can li yan production practices based on the mine conveyor belt damage was analyzed to identify the main conveyor belt injury, combined with the actual on-site put forward specific preventive measures, Mine Conveyor safe operation and management has a certain significance.

    These measures include: ① All coal feeder discharge port to replace the discharge hopper, and a certain tilt angle, an additional buffer in its lower parts, big lump coal gangue is no longer directly hit the conveyor belt on the conveyor belt to reduce the impact of its force. ② all the coal drop points and the conveyor belt leather skirt plate, and lengthened, and the addition of 3 ~ 5m of net derivative material retaining net, large lump coal gangue fall protection nets have been blocked after the direction of forward along the conveyor belt, jammed or dropped without roller conveyor section between the frame and return. ③ The number of roller racks welded reinforced frame, I used the welding repair welding to increase the roller frame strength; the notch in the roller placed above the ear hook loop for hanging additional fixed-roller, so that will not be smashed idler next. ④ placed in all the most low-lying belt of the road roller increased rack density, that is, in every care has increased by two roller frame roller frame, roller frame here to reduce the span conveyor transporting coal gangue through lower-lying areas are no longer hanging on the overhead rollers inside. ⑤ produced four U-shaped ring, the tension of the 4 car fixed to the rails on the corner to prevent them from jumping up and down and side to side to avoid off Road, without prejudice to before and after the move will not affect the working conditions under the belt tension adjustment power, does not affect the tensioning device work properly. ⑥ strengthen conveyor safety protection device routine maintenance and repair, and ensure the protection device sensitive and reliable, so that in the absence of a long belt conveyor will not run under protected status. Through this rectification, conveyor belt injury reduced risk of 13.1% from 56.4%, greatly increasing transport efficiency.

    4 high-power application of belt conveyors

    Yanzhou Mining (Group) Company Xinglongzhuang coal face for many years the use of SSJ1200 / 3 × 200-type belt conveyor, using electric motors and couplers supporting the use of the driving method, using TK100 communication system control operation, a short-distance, transport a small amount of equipment, multi-occupancy performance is not reliable, has been unable to meet the current high yield and high long-distance mining face. To this end, the trough transport use SSJ1400 / 3 × 400-type belt conveyor, equipment, greatly reduced the accident rate to eliminate the fault zone, tear tape and other accidents, reducing the amount of replacement of conveyor belts and rollers to ensure that the work of Surface per month 600,000 t.

    In order to avoid high-power, long-distance belt conveyor start of wave phenomena, and the supporting force with tension adjustable tensioning device, start-up phase to provide a large conveyor belt tensioning force to prevent slipping, during normal operation to reduce tension force to maintain the conveyor run, face maintenance relaxation time to belt completely to prevent long conveyer belt tensioning deformation phenomena. In addition, the coal face mainly used flame-retardant solid woven conveyor belt, its elongation rate is high, so that the traditional heavy hammer tension and back tension-generated columns hoist the limitations of these tensioning device difficult to adapt to high-power, long – -distance belt conveyor operational requirements. In order to reduce costs and improve the conveyor belt life, use imported LAD automatic tensioning devices, tensioning force to achieve dynamic monitoring and dynamic adjustment of conveyor belt designed to greatly reduce the safety factor. Supporting the use of the device with the reservoir with a pump device to provide impetus to the use of tension overlap with the completion of multi-function, an increase of storage with a length and a decrease of tension for each time, greatly enhance the efficiency of storage zone.

    After a variety of soft-starting device of belt conveyor analysis and comparison of their choice according to face production features Australian production BOSS4000 viscous transmission speed devices. The device achieved by changing the pitch clutch to change the viscous liquid film between the shear force to change the transmission torque. Common motor used in combination with the shaft to form a viscous liquid soft-start device as drive systems to achieve full-speed conveyor, fully loaded, and a smooth start, so that multiple motor load balancing, reduce electrical and other components of the technical requirements, but also improved the delivery Machine reliability and service life.

    5 Common tape machine to achieve ultra-long turn Transportation

    Yanzhou Mining (Group) Corporation 6606 North residential coal transport trough toward long-1206m. Due to tunnel excavation according to the center line along the seam roof, undulating, partial up to 11 °, in the horizontal plane there are three turning. Through careful calculation, careful construction and strict management, and achieve long turn ordinary belt conveyor transport.

    6606 surface coal thickness 1m, blasting off the coal, using SSJ800/90-type floor-standing retractable belt conveyor, conveyor length rated 1000m, transportation capacity of 400t / h, tape speed of 2m / s, motor power 90kW, tape machine width of 800mm, 3 layer of nylon cloth rubber tape, strength 1960N / (cm · layer), tape re-8kg / m, the re-roller 14kg / m, at the end of roller weight 5kg / m, idler group spacing 1.5m, driven Circuit angle 450 ° .

    Tape turn implemented as follows: the original roadway reduced to only three turns Shui a 10 ° bend of the decorative tape to tape head 898m, turn 282m, total length of 1180m, loader 26m. Turning from the four belt conveyor rack to complete, each 2.5 ° curve segments roller group linked to be put on the medial side bearing adjustment plate before the hole on the host, lateral side adjustable hook plate after the peg into the hole, install the support for the formation of 3 ° angle, adjustment hole spacing 50mm, Idlers bracket width 1120mm. Curve segment at the end of idler shaft placed inside the tone on the tape rack partial mouth third port, the outer shaft placed first or second transfer partial mouth, adjusting the spacing of partial mouth 30mm, the inner curve of curve segment elevation 2 ° ~ 5 °, tape rack inside the booster 50 ~ 104mm. Construction in strict accordance with the laying of the waist belt, midline deviation of less than 20mm. In the vertical direction, the first use of tape rack 3 adjustable leg holes Withdrawing to live the general location of sub-waist, and then in the frame Xiadian pieces of wood, so that the difference with the waist is less than 30mm. Each curve segment strings grew up in the 16m, so that no inflection point 15m tail frame, shrink tape to avoid turning the tail in place. Strengthen the normal maintenance and lubrication, and timely transfer bias, to avoid overloading start. Ramen’s two-sided right shall not be at the same time ring guns, to avoid the peak of coal.

    6 France’s powerful belt conveyor Deviation Management

    Yanzhou Mining (Group) Company Dongtan coal mine, Shek Mun, Rock Lane, the use of the transport belt assembly imported from France a powerful belt conveyor, conveyor from the full-length 7200m. Tape machine initially smooth and reliable operation, five years later, a mild deviation, using a variety of ways to adjust to keep running after the treatment. Since then, the tape appears throughout a large area, non-law deviation drift, the entire tape side to the roller side of the trough, causing the whole roadway Caesar coal, rack plug, operation and maintenance problems, endangering the safety in production, we must conduct a comprehensive treatment.

    After their analysis, that the tape has been gradually loses its elasticity due to aging, into the groove of variation, with the trough idlers decreasing contact area, resulting in tape reset is reduced. Actual governance programs are as follows: ① to adjust nose, tail and the entire trough roller and belt conveyor idlers conveyor centerline perpendicularity; adjust the whole process of H-shaped bracket at the horizontal level degrees; transformation chute to eliminate eccentric loading. These measures are mainly systems tape to eliminate interference suffered lateral force, the early running in the tape to achieve the desired effect of the treatment. ② additional devices means deviation limit the amount of hours in the wandering little, when the deviation is large role in not only failed to exercise any limit, and curly, wear tape side, resulting in tape scrapped, it is generally not suitable for adoption. ③ enhancing rotary-aligning roller group bearing in strength, power reset to restore self-aligning effect, but to no avail. ④ section, dense arrangement of self-aligning roller group, and will raise the self-aligning roller group 20mm installation, so that the contact stress increases with the tape, about 25% of the partial role of the roller is transferred to recovery, deviation distance control In the 200mm or so, greatly ease the transport crisis. However, such self-aligning idler have “time delay” and the friction torque over an hour non-reaction zone, will continue to be allocated to the other side of the tape, and further exacerbate the end of adhesive tape wear and tear. ⑤ full tape flipped for use, the tape with the trough idlers good contact, so reset the force is greater than interference, so that tape again and stable operation, not only save a lot of money, more importantly, the extended tape replacement cycle, for the French Strong adhesive tape made to win time to digest.

    7 Fully scalable tape machine digging at the bottom of belt run off control

    The upper belt conveyor belt equipped with anti-deviation unit, but also in the load state, deviation than the smaller; the lower part of tape in a no-load condition, light weight, in particular the use of mechanized excavation of 800 type and 44-type belt conveyer belt face narrow, with a type thin, more deviation. Yanzhou Mining (Group) Company Baodian mine dug through the Comprehensive scalable belt conveyor belt run off the bottom of the cause analysis, have taken effective control measures, and achieved good efficiency.

    Mine prevention and control measures include the installation and operation of two aspects.

    In the installation phase of the measures taken are as follows: during the construction of belt conveyor Road, in strict accordance with the center line of roadway construction, to reduce the amount of roadway left skew; belt conveyor is installed, hanging belt conveyor Road centerline using a laser directed in strict accordance with the center line construction, to reduce askew about the amount of belt conveyor; belt conveyor H frame is installed, to clean up coal or floating gangue floats to the hardground avoid H frame bottom corner at a floating or floating coal gangue; tape laying docking connector, finding homogeneous pairs of positive and to avoid the belt run off caused by human factors.

    Measures taken in the use phase are as follows: cleaning belt conveyor Road, do not use pressure water washing belt conveyor H frame corner and found that when the H planes lose one’s footing to take timely measures to cushion real, mats prison, reducing the amount of H frame so inclined; belt conveyor Machine Road, H-frame to send objects around skew caused by the transportation timely adjustments when finished object reset; right deviation of the bottom of the tape running, it is necessary to install anti-deviation vertical roll and the bias-adjustable device to prevent the tape around the bottom of the conveyor belt deviation centerline, causing friction between the tape and the H frame.

    The bottom of the run the tape edger, and installing anti-deviation method is bias-adjustable device: In the belt conveyor deflection H frame around the bottom of the large amount of the local installation tape bias-adjustable device, the bias-adjustable device before and after the crooked side of every 3 ~ 5 H frame to install a group of anti-deviation edger; in belt conveyor belt running at the bottom of the skew-side installation of anti-deviation edger. After transformation, the bottom of the belt run off the amount of reduction in the amount of tape edge wear is also reduced, extending belt life and reduced costs; and as tape edge is not exposed with a core, but also reduce the need for coal quality.

    8 trough belt conveyor debugging process deviation Governance

    Yanzhou Mining (Group) Company of Jining II coal mine 23 on the 11 mechanized mining face transport trough length 1420m, drop 47m, slope 2 ° ~ 10 °, an average of 6 °. At the junction of production debugging process, I found many Deviation tape transport trough serious, more out of coal. To this end, the trough belt conveyor carried out a comprehensive treatment situation is obviously better, and achieved good results.

    Newly installed tape in debugging to find good benchmark, the middle part of the tape to ensure the upper and lower roller handle in the same direction, H frame and idler beams edge vertical, do not move, tape head, tail and the middle part of the need to ensure that flat , positive, and consistent with the tape centerline, tunnel slope change point is not ribbon, using the same level of tape, adhesive tape made to ensure joint quality.

    Their control measures are as follows: ① to adjust H frame and roller, roller. Pull tape re-adjustment and not perpendicular to the centerline of the H frame, mat digging the whole yin and yang, the Ministry of H frame level to ensure the nose, fuselage and tail flat, straight, steady, change in the middle part of the roadway slope point of the H frame heightening, increase the curve radius, so a good belt and idler contacts. The middle part of the adjustment roller handle, so that the roller handle all fight to the nose direction, the next roller handle all fight to the tail direction, to ensure that roller, belt conveyor idler axis with the center line perpendicular to each other. In addition, adjusting the point of loading coal reproduced asylum device so that the nose reproduced downloading coal center. ② to strengthen the quality of tape joints. Unqualified right to re-joint connectors, tape joints cutting incision with the tape when the tape to ensure the vertical center line, using the same type of clamp. Operation to strengthen the joint inspection, timely replacement of failed joints. ③ plus fortified deviation roller, the replacement does not match the tape. Deviation lots in the tape easy to install anti-deviation fixed rack roller to forcibly prevent the belt run off at the same time to replace failed, the tape does not match the total replacement of the 400m high-strength adhesive tape. ④ regular checks cleaning device, at any time remove the tail of coal gangue and other debris. Check cleaning device with particular attention to check the uninstall Office sweeper drum is intact, shift relief must be cleared when the tail of the plot of coal gangue and other debris, but also in operation at all times maintain the tail clean, stepped up patrols to prevent the roller being gangue , wool and other debris stuck a day, assign special personnel to cut wool, to ensure that each roller is a flexible operation.

    9 strong deviation handling belt conveyor

    Belt conveyor belt run off run-time is the most common failures. Yanzhou Mining (Group) Company of Jining II Coal Mine Belt Conveyor Misalignment of the strong experience of dealing with a conclusion that the failure to address these priority is to install the dimensions of accuracy and attention to routine maintenance.

    ① adjusted carrying roller group. In the central belt conveyor belt when the deviation of the location of an adjustable roller group; roller frame both sides of the mounting holes are processed to grow holes, tape bias which side of the roller group on which side of the tape towards the forward direction of forward or Another lateral shift. ② Install self-aligning roller group. Self-aligning idler group, intermediate shaft type, four-link type and vertical roll-style, with its principle of vertical roll is used to block rotation in the horizontal plane or produce horizontal thrust so that tape auto-adjust the belt run off heart. The total length is generally shorter when the conveyor or conveyor a two-way run-time using this method, long-distance conveyor is not the best method has been applied, because the self-aligning roller group will affect the life of tape. ③ adjust drive pulley and bend pulley. Roller installation location to be perpendicular to the direction of conveyor length of the centerline, if the skew is too large deviation bound. For the head drum, such as adhesive tape to the roller bearing on the left while the right side of deviation to move forward, but also the right side of bearing can be moved back. Rear roller adjustment method and the head the opposite. ④ Belt Tensioner adjustment. Use screw up tight, or when the hydraulic tensioner, tensioner bearing roller 2 should also shift to ensure that the vertical cylinder axis and the vertical tape. Adjustment method is similar with the roller adjustment. ⑤ reproduced point blanking position on the belt run off impact. Blanking position on the belt run off a very big impact, especially in the belt conveyor orthogonal when a greater impact. Reprinted points should normally be considered the relative height of the upper and lower two tapes. Relative height of the lower horizontal velocity component of the material the greater the impact on the lower side tape the greater, the material is also very difficult to center, so that the material on the tape cross-section deflection, eventually leading to belt run off. The design should be as much as possible to increase the relative height of two tape machines, subject to space constraints of mobile bulk material transport machinery down the funnel and guide trough the form and size of such pieces should be seriously considered. ⑥ Two-way conveyor belt running deviation adjustment. Their tape machine than the one-way deviation adjustment should be much harder. To carefully observe the direction of tape movement and the relationship between the trend deviation, one by one adjustment; the first adjustment of a direction and then adjust the other direction. Focus on the drive pulley and bend pulley adjustments, followed by the roller blanking adjustment and material point of adjustment; curing tape joints so that when the attention of force uniform transverse cross-section.

    10 Power Belt Conveyor transformation

    Yanzhou Mining (Group) Company Xinglongzhuang tape transport built since the mine has been using strong adhesive tape DX4-based machine, is divided into East and West wings of two separate systems shared the whole of the coal mine transportation task. With the continuous development of coal production, coal transportation system has become a bottleneck restricting production. Therefore, they can take to increase power, increase belt speed (transformation of drive and control unit) way conveyor belt carried out the technological transformation of the transport capacity from 1300t / h to 1600t / h, based follow-up several DX4-type ore Power belt conveyor provides the transformation, and other mine success stories.

    From the economy, practicality, reliability and so on into account, the original constant filling fluid coupling into post-secondary room YOXG650 longer constant filling type coupling, reducer used in Flanders H2SH11 Hardened reducer machine, and is equipped with tape backstop. The advantage is to improve the motor starting capability; the protection of electric motors, to prevent them from overload; to reduce shock and vibration, reducing the starting torque; increase the start-up time, extended tape life, but also the relative increase in tape and joint strength; the coordination of multi-drive the load distribution. In view of the original mechanical tension winch the tension can not be changed with the condition is self-adjusting tension, so that belt tension is always in a state of tension force of the largest direct impact on the tape life, and its installed on the tensioner pulley blocks cars on both sides, tension in the tensioning car exist in the process deviation phenomenon and therefore I decided to replace hydraulic automatic tensioning device.

    Electric control system uses PLC to match the computer with the ground, supplemented by television industry to realize remote monitoring and control of the belt conveyor, belt conveyor in line with coal mine safety production requirements. Coal bunker coal-bit and tape machines and to stop the implementation of the open coal feeder closed-loop control to avoid overloading of the tape down and re-start the resulting harm. Entire drive part of the foundation and the original basis for a complete match, do not need to re-do basis; all the transformation to the site that can be installed to use, does not affect the normal mine production, labor time is short, transformation and high efficiency.

    11 mechanized excavation face conveyor belt pull the tail quickly shift device

    Mechanized excavation face in coal mine production, mechanized excavation machines can be relied upon to provide impetus to the completion of its own pumping station walking, while the belt conveyor tail to rely on external supply of power or manpower to achieve after the shift. Yanzhou Mining (Group) Company Xinglongzhuang commonly used chain to belt conveyor tail and the mechanized excavation machines connected together, relying on mechanized excavation machines running conveyor Pull the tail to complete the extension of conveyor length, low efficiency, security risk more. To this end, they face the light of coal loader working principle of self-shifting device, developed a belt conveyor tail Moving Self-shifting device, and made good use of effects.

    ① structure and composition. Channel will be used conveyor tail and 5 bearing segment welded into a rigid whole tail, in the channel to increase the welding ear ear seat seat and Pull. Ear increase in box seat for the structure, the internal fixed-raising jack, cylinder block connected with the ear, and roller hinge rod. Pull Pull ear jack cylinder and the hinged seat, piston rod and the slide hinge. The overall layout of the tail on each side to increase five jacks and a pull-shift jack. Jack piston rod and the increase in rolling wheel on the rail seat hinged, with the piston rod retraction when the roller seat rail can carry away from the floor. ② working process. Pull the tail, the mechanized excavation machines to stop cutting and rake loading operations, mechanized digging machine hydraulic pump station to the conveyor tail from the transfer device to provide hydraulic energy, control components control the raising jacks and jack Pull retractable, so that the whole tail and self-movement devices alternating each other pivot forward. Pull long distance, but also to achieve a whole tail of a continuous self-shift.

    Concrete steps are as follows: hydraulic pump station to increase the jack for the fluid, an increase in jack piston rod extended, will lift the tail off the whole floor, the overall support of the tail through the wheel on the rail; hydraulic pump station for the liquid to Pull Jack , Pull jack piston rod introduced, as the whole tail on the rail track in the rolling friction is less than sliding friction on the floor, supporting the rail on the tail of the overall backward movement; Pull jack piston rod fully extended, the overall tail stops moving to complete the Pull stroke, hydraulic pump station for the hydraulic jacks to raise, an increase in jack piston rod retracted, and increase the jack piston rod hinged wheel blocks will be carried away from the bottom rail The overall drop in the floor on the tail; Hydraulic Pump Station to Pull jack for the fluid to the cylinder rod Pull jack body contraction, with piston rod guide with backward movement, to complete a pull-shift cycle.

    12 Underground Belt Conveyor reactive power compensation technique

    Yanzhou Mining (Group) Company in underground coal mines Baodian 660V reactive power compensation systems to promote energy-saving technologies, successfully applied to a strong focus on the transport belt conveyor systems, access to considerable economic benefits.

    Underground mine, the main transport system, which is four powerful belt conveyor, including three by the Working for Coal Bunker Coal, a coal by the machine, loader after loading of coal to the main coal bunker coal conveying, both 660V induction motor drag. Drag way 3 × 160kW of the 3 groups, 2 × 160kW +2 × 75kW of a group composed of four units installed in the main control room control cabinet control, respectively, of the 5 sets of 320kVA transformer substation power supply. As the belt conveyor transport long distance and the weight of their larger tape. Starting when the impact of current to maintain a long time, transformers fever seriously. Meanwhile, the transmission line voltage drop greater deterioration in working conditions for the motor, reducing the transport capacity of the system. Tested, no-load belt conveyor, the motor power factor is only about 0.5, the normal power factor less than 0.72 when the coal, resulting in system reactive power loss seriously. Local reactive compensation is in the motor terminal shunt power capacitors to compensate for the motor itself, the reactive power consumption. Use of reactive power compensation technique can significantly improve the power factor, thereby reducing wear and tear, to ensure the quality of power supply, effectively improve the electrical properties and increased drag torque, but also improve the power supply transformers and other equipment utilization, enhanced with a carrying capacity.

    Compensation for reactive power compensation is divided into centralized and decentralized compensation for three forms of compensation and in-situ focus compensation is ineffective, local compensation best results. After repeated demonstration, they decided to compensate in the master room, compensation cabinets and control cabinets in parallel, that is, the original of the outlet side of control cabinet-site compensation, not only conducive to on-site operation and maintenance, but also to avoid another cutting Cave Room. Use of reactive power compensation techniques to improve the power factor, electric motors, transformers, cables, etc. There was a marked performance improvement in power consumption for the New Year 315360kW · h. Efficiency alone, 1.4-year payback.