Hydraulic support shifting operation sequence

Hydraulic support shifting operation sequence

When operating the hydraulic support, you must master the eight essentials to achieve fast, uniform, sufficient, positive, straight, stable, strict, and clean.

Transfer operation 1. Open the inlet valve of the bracket before moving the frame;

2. Before moving the frame, the floating coal , floating rafts and other sundries in the frame must be cleaned, otherwise the transfer is not allowed;

3. Before moving the frame, it is necessary to check the condition of the top plate. When the roof is broken or there is a phenomenon of roofing, the frame should be handled and then moved to prevent the roof from being overburdened during the moving process.

4. Before moving the frame, check whether there are cables, liquid pipes and other equipment in front. If it is cleaned, move the frame again. If it cannot be cleaned in time, mark the frame and wait for the machine to be completely processed.

5. When operating the side guard, the side guard must be lowered after the top beam is removed from the top plate;

6. When the first frame shift down the column, so that after leaving the roof top beam is stopped down rapidly column frame shift; broken roof allows for "wiping top frame shift" or "frame shift Pressure"; at the top of the metal mesh down frame The beam should be detached from the metal mesh to avoid tearing the mesh;

7. After the frame is moved, it must be arranged neatly to form a straight line;

8. After the top and bottom beams are connected to the top, adjust the balance jack properly to make the bracket achieve the best support effect;

9. Follow the operation procedure to chase the machine in sequence, and if necessary, carry out multi-point pulling;

10. When the current beam pressure is large, in order to avoid the base under the tie when the frame is moved, the bottom must be moved forward.

Shifting face scraper conveyor

1. It is necessary to push the scraper conveyor correctly and in time, and the scraper conveyor after the shift must be in a straight line;

2. The floating coal of the nose and tail must be cleaned and thoroughly, to prevent the movement from being insufficient or the machine tail to float and damage the equipment;

3. When the scraper conveyor stops running, it is not allowed to operate to prevent the chain from being too tight; (except for the tail of the nose)

4. The operating position must be accurate and stable when changing, pay attention to observe the bending of the scraper conveyor;

5. If the resistance is too large to push the scraper conveyor during the transition, the cause should be identified and then moved to avoid damage to the equipment;

6. When changing, it is necessary to determine the mode of displacement according to the coal mining method. The scraper conveyor cannot be moved by two ends to prevent the biting frame caused by the arching;

7. The shifting scraper conveyor must pay attention to the front of the jack to prevent the cable, liquid pipe and other equipment from being crushed;

8. When the scraper conveyor head is moved, the scraper conveyor driver must be notified before the scraper conveyor can be pushed;

9. After the end of the machine head is removed, the end support must be done as required.

Operation, maintenance precautions

1. The parts, piping systems and auxiliary equipment of the bracket must meet the original design requirements and must not be arbitrarily demolished;

2. When cleaning large coal, vermiculite and debris, the following steps must be taken;

3. Firstly, the working surface scraper conveyor is locked, and at the same time, the operator is controlled, the scraper conveyor is locked, and it is on standby to prevent others from starting the transporter without authorization;

4. The guard plate must be extended when the staff member is not close to the coal gang and the unmanned and other obstacles are confirmed.

5. Strictly implement the knock-on top system, dispose of the meteorites and large lump coal at the work site, and work under the condition that some people observe the roof and coal gang;

6. When working within 5 meters from the front and rear drums of the shearer, the power of the shearer must be cut off;

7. In the part of the nose, in addition to the locking scraper conveyor, it is also necessary to lock the transfer machine and the crusher ;

8. Operation of the geological structure such as the bracket through the fault: Before the movement of the bracket, the height should be strictly controlled according to the measures, to prevent the bracket from being crushed and pay attention to the gentle transition of the adjacent bracket;

9. When the bracket is raised, it should be observed to achieve the initial support force;

10. When the bracket is raised, pay attention to the position of the side guard to prevent damage.

11. After the coal mining machine cuts the coal, the bracket should be supported immediately. The drum should not exceed 3-6 meters away from the shearer. For the broken roof, the coal wall can be advanced in the serious section, and the frame must be extended. Help the board to withstand the coal wall;

12. When operating, you should master the reasonable support height of the bracket;

13. If there are a lot of meteorites on the top plate, the roof should not be well connected after the frame is removed, and the meteorite should be removed;

14. When overhauling and handling the hydraulic system, the shut-off valve must be closed and the overhauled bracket must be isolated to allow the pressure at the inspection site to be completely released, and the work can be performed without confirmation.

15. The main road maintenance must inform the pump station to stop the pump and take the locking method. At the same time, the front-stage pressure shut-off valve of the fault part should be closed, and the correct method should be used for pressure release. The inspection can be carried out without any error;

16. When the control valve fails or malfunctions, it is necessary to carefully find the cause, eliminate the fault in time, and do not work unsurely to prevent damage to personnel and equipment;

17. When the frame is lowered, if the roof or other problems are found, immediately raise the bracket and return it to the frame after proper handling;

18. prohibited instead of iron wire with a "U" pin, pin one leg inserted prohibited;

19. The operating bracket should be: "fast, positive, enough, even, flat, clean, strict, tight" eight-character policy.

which is:

1. All kinds of operations should be fast;

2. The speed of the transfer should be uniform;

3. The stepping distance of the frame should be in accordance with the operating procedures;

4. The position of the bracket should be positive and not bite;

5. Each group of brackets is arranged in a straight line;

6. The bracket and scraper conveyor should be stable and reliable;

7. The top beam should be in close contact with the top plate without leaving a gap;

8. Coal, concrete and coal dust should be cleaned up.

CP96 Pneumatic Cylinder Barrel