Mining belt conveyor tail self-moving and reversed loader stepping self-moving device

Abstract

The utility model discloses a mining belt conveyor tail self-moving and reversed loader stepping self-moving device which comprises a valve body, an electromagnetic pilot operated valve I, an electromagnetic pilot operated valve II, an electromagnetic pilot operated valve III and an electromagnetic pilot operated valve IV are sequentially arranged above the valve body, and the electromagnetic pilot operated valve I is communicated with a hydraulic control reversing valve I and a hydraulic control reversing valve II respectively. The electromagnetic pilot operated valve II is respectively communicated with the hydraulic control reversing valve III and the hydraulic control reversing valve IV; the electromagnetic pilot operated valve III is respectively communicated with the hydraulic control reversing valve V and the hydraulic control reversing valve VI; and the electromagnetic pilot operated valve IV is respectively communicated with the hydraulic control reversing valve VII and the hydraulic control reversing valve VIII. The self-moving device solves the problem that an existing self-moving device is low in self-moving efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining machinery and equipment, and relates to a self-moving tail section device for mining belt conveyors and a stepping self-moving device for transfer machines. Background Technology

[0002] Currently, most underground conveyor belt tail self-movement and transfer machine step-by-step self-movement systems employ remote electrical control. During operation, an industrial computer or remote controller at the control center remotely controls the self-movement of the conveyor belt tail and the step-by-step self-movement of the transfer machine. This process requires frequent manual signaling to the solenoid valves via the control center or remote controller, and each action necessitates manual on-site observation to ensure it is performed correctly, significantly reducing the efficiency of the self-movement process. Therefore, a device is needed that allows for one-button operation to complete the entire self-movement process of the conveyor belt tail and the transfer machine step-by-step self-movement. Utility Model Content

[0003] This utility model relates to a self-moving tail section device for mining belt conveyors and a stepping self-moving device for transfer machines, which solves the problem of low self-moving efficiency in existing self-moving devices.

[0004] The technical solution adopted in this utility model is a self-moving tail section device for mining belt conveyors and a stepping self-moving device for transfer machines, including a valve body. Above the valve body, there are electromagnetic pilot valves I, II, III, and IV arranged in sequence. Electromagnetic pilot valve I is connected to hydraulic directional valve I and II respectively; electromagnetic pilot valve II is connected to hydraulic directional valve III and IV respectively; electromagnetic pilot valve III is connected to hydraulic directional valve V and VI respectively; and electromagnetic pilot valve IV is connected to hydraulic directional valve VII and VIII respectively.

[0005] The invention is further characterized by:

[0006] Both hydraulic directional valve I and hydraulic directional valve II are connected to bidirectional lock I.

[0007] Both hydraulic directional valve V and hydraulic directional valve VI are connected to the two-way lock II.

[0008] Hydraulic directional valve III is connected to pressure relay VII.

[0009] The hydraulic directional valve IV is connected to the pressure relay VIII.

[0010] The hydraulic directional valve VII is connected to the pressure relay III.

[0011] The hydraulic directional valve VIII is connected to the pressure relay IV.

[0012] Pressure relay I and pressure relay II are connected to the two-way lock I respectively.

[0013] Pressure relays V and VI are connected to the two-way lock II.

[0014] The beneficial effects of this utility model are:

[0015] 1. Integrating the solenoid pilot valve, hydraulic directional valve, and pressure relay into a single valve assembly reduces installation space and installation difficulty;

[0016] 2. The control function is completed by the linkage between the pressure relay and the electromagnet on the solenoid pilot valve, which reduces the difficulty of operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the existing belt conveyor tail section and transfer conveyor;

[0018] Figures 2(a) and 2(b) are schematic diagrams of the structure of the self-moving tail of the mining belt conveyor and the stepping self-moving device of the transfer machine of this utility model;

[0019] Figure 3 This is a hydraulic schematic diagram of the tail self-moving device for mining belt conveyors and the stepping self-moving device for transfer machines.

[0020] In the diagram, 1. Valve body, 2. Pressure relay I, 3. Hydraulic directional valve I, 4. Hydraulic directional valve II, 5. Solenoid pilot valve I, 6. Two-way lock I, 7. Pressure relay II, 8. Solenoid pilot valve II, 9. Hydraulic directional valve III, 10. Hydraulic directional valve IV, 11. Solenoid pilot valve III, 12. Hydraulic directional valve V, 13. Hydraulic directional valve VI, 14. Two-way lock II, 15. Solenoid pilot valve IV, 16. Hydraulic directional valve VII 17. Hydraulic directional valve VIII, 18. Pressure relay III, 19. Transfer conveyor push cylinder, 20. Pressure relay IV, 21. Transfer conveyor vertical cylinder, 22. Pressure relay V, 23. Pressure relay VI, 24. Belt conveyor tail push cylinder, 25. Pressure relay VII, 26. Pressure relay VIII, 27. Belt conveyor tail vertical cylinder, 201. Transfer conveyor, 202. Guide rail I, 203. Guide rail II, 204. Belt conveyor tail. Detailed Implementation

[0021] The following detailed description is provided in conjunction with specific implementation methods.

[0022] This utility model relates to a self-moving tail section device for mining belt conveyors and a stepping self-moving device for transfer conveyors. A schematic diagram of an existing belt conveyor tail section and transfer conveyor is shown below. Figure 1 As shown.

[0023] Using guide rail II203, the transfer machine 201 and the tail of the belt conveyor 204 are connected. In the initial state, the transfer machine push cylinder 19, the transfer machine vertical cylinder 21, and the belt conveyor tail push cylinder 24 are in the retracted state, causing the guide rail I202 to leave the ground, while the belt conveyor tail vertical cylinder 27 is in the extended state, supporting the tail of the belt conveyor 204. Moreover, due to the presence of the bidirectional lock I6, the belt conveyor tail vertical cylinder 27 can be kept in the extended state.

[0024] Figure 2(a) is a bottom view of the tail self-moving device of the mining belt conveyor and the stepping self-moving device of the transfer machine of the present invention; Figure 2(b) is a front view of the tail self-moving device of the mining belt conveyor and the stepping self-moving device of the transfer machine of the present invention.

[0025] This utility model relates to a self-moving tail section device for mining belt conveyors and a stepping self-moving device for transfer machines. It includes a valve body 1. Above the valve body 1 are sequentially arranged electromagnetic pilot valves I5, II8, III11, and IV15. Electromagnetic pilot valve I5 is connected to hydraulically controlled directional valves I3 and II4. Hydraulically controlled directional valves I3 and II4 are simultaneously connected to a two-way lock I6. Pressure relays I2 and II7 are connected to the two-way lock I6.

[0026] Solenoid pilot valve II8 is connected to hydraulic directional valves III9 and IV10 respectively; hydraulic directional valve III9 is ​​connected to pressure relay VII25; hydraulic directional valve IV10 is connected to pressure relay VIII26. Solenoid pilot valve III11 is connected to hydraulic directional valves V12 and VI13 respectively; hydraulic directional valves V12 and VI13 are simultaneously connected to two-way lock II14; pressure relays V22 and VI23 are connected to two-way lock II14 respectively. Solenoid pilot valve IV15 is connected to hydraulic directional valves VII16 and VIII17 respectively. Using guide rail II203, the transfer machine 201 and the tail of the belt conveyor 204 are connected. In the initial state, the transfer machine push cylinder 19, the transfer machine vertical cylinder 21, and the belt conveyor tail push cylinder 24 are in the retracted state, causing the guide rail I202 to leave the ground, while the belt conveyor tail vertical cylinder 27 is in the extended state, supporting the tail of the belt conveyor 204. Moreover, due to the presence of the bidirectional lock I6, the belt conveyor tail vertical cylinder 27 can be kept in the extended state.

[0027] like Figure 3As shown, the working principle of this utility model's mine belt conveyor tail self-moving and transfer machine stepping self-moving device is as follows: The high-pressure (21-37.5MPa) working medium is divided into two parts after entering valve body 1 of the device: one part enters solenoid pilot valves I5, II8, III11, and IV15 as pilot medium; the other part enters hydraulic control directional valves I3, II4, III9, IV10, V12, VI13, VII16, and VIII17 as working medium. When self-moving of the belt conveyor tail and stepping self-moving of the transfer machine are required, the electrical control system will cause the electromagnet 2DT of solenoid pilot valve I5 to... When energized, the pilot medium passes through the solenoid pilot valve I5 and enters the hydraulic directional valve II4, causing II4 to open. The working medium then passes through II4 and the two-way lock I6, entering the rod chamber of the four belt conveyor tail cylinders 27 through port B1 (the retraction port of the belt conveyor tail cylinder 27), causing the belt conveyor tail cylinders 27 to retract. After the belt conveyor tail cylinders 27 have retracted, the working medium pressure at port B1 reaches the set value of pressure relay II7, which sends an electrical signal. This de-energizes the solenoid 2DT of solenoid pilot valve I5, while energizing the solenoid 3DT of solenoid pilot valve II8. This allows the working medium to pass through the electro-hydraulic directional valve IV10 and enter the belt conveyor tail push cylinder 24 through port A2 (the extension port of the belt conveyor tail push cylinder 24), causing the belt conveyor tail to push. When cylinder 24 extends, due to the large weight of the transfer machine (the length of the transfer machine is between 50-100m, the width is 1-1.5m, and the height is 1-2m; the tail of the belt conveyor is 10m long, 1.5-2m wide, 1m high, and weighs 20 tons), the entire tail of the belt conveyor 204 will move forward by one step. After the tail of the belt conveyor push cylinder 24 has extended, the pressure at port A2 will reach the set value of pressure relay VIII26. Pressure relay VIII26 will send an electrical signal, the solenoid 3DT of solenoid pilot valve II8 will be de-energized, and the solenoid 1DT of solenoid pilot valve I5 will be energized. This allows the working medium to enter the rodless chamber of the tail of the belt conveyor vertical cylinder 27 from port A1 (the extension port of the tail cylinder 27) after passing through hydraulic control directional valve I3 and bidirectional lock I6, causing the tail cylinder 27 of the belt conveyor to extend and support the tail of the belt conveyor 204.

[0028] When the tail cylinder 27 of the belt conveyor has fully extended, the pressure at port A1 will reach the set pressure of pressure relay I2. At this time, pressure relay I2 will send an electrical signal, causing solenoid 1DT of solenoid pilot valve I5 to de-energize and solenoid 5DT of solenoid pilot valve III11 to energize. The working medium, after passing through hydraulic directional valve VI13 and two-way lock II14, enters the rodless chamber of transfer conveyor cylinder 21 from port A3 (the extension port of transfer conveyor cylinder 21), causing transfer conveyor cylinder 21 to extend. At this time, the guide rail I202 connected to transfer conveyor cylinder 21 falls to the ground, supporting the entire transfer conveyor 201. After the transfer conveyor cylinder 21 has fully extended, the pressure at port A3 will reach the set pressure of pressure relay VI13. When the set value of 23 is reached, pressure relay VI23 will send an electrical signal, causing solenoid 5DT of solenoid pilot valve Ⅲ11 to de-energize, while solenoid 7DT of solenoid pilot valve IV15 and solenoid 4DT of solenoid pilot valve Ⅱ will be energized. This allows the working medium, after passing through electro-hydraulic directional valve III9 and electro-hydraulic directional valve VIII17, to enter the rod-side chamber of belt conveyor tail-end push cylinder 24 and the rodless chamber of transfer conveyor push cylinder 19 respectively through port B2 (the retracted cylinder port of belt conveyor tail-end push cylinder 24) and port A4 (the extended cylinder port of transfer conveyor push cylinder 19). This causes belt conveyor tail-end push cylinder 24 to retract and transfer conveyor push cylinder 19 to extend. At this time, transfer conveyor 201 will move along the belt conveyor tail-end push cylinder 24 and transfer conveyor push cylinder 19 under their action. Guide rails I202 and II203 move forward one step. After the transfer conveyor cylinder 19 extends, the pressure at port A4 reaches the set pressure of pressure relay IV20. Pressure relay IV20 sends an electrical signal, de-energizing solenoid 7DT of solenoid pilot valve IV15 and solenoid pilot valve II 4DT, and energizing solenoid 6DT of solenoid pilot valve III11. This causes the working medium to enter the rod chamber of transfer conveyor cylinder 21 through port B3 (the retraction port of transfer conveyor cylinder 21) after passing through hydraulic control directional valve V12 and two-way lock II14, causing transfer conveyor cylinder 21 to retract and the entire transfer conveyor 201 to land again. After transfer conveyor cylinder 21 has retracted completely, the pressure at port B3... The pressure relay V22 will reach its set value, triggering an electrical signal that de-energizes the solenoid 6DT of the solenoid pilot valve III11 and energizes the solenoid 8DT of the solenoid pilot valve IV15. At this point, the working medium, after passing through the hydraulic directional valve VII16, enters the rod chamber of the transfer conveyor cylinder 19 via port B4, causing the cylinder to retract. The guide rail I202 will then move forward one step. Once the transfer conveyor cylinder 19 has fully retracted, the pressure at port B4 (the retraction port of the transfer conveyor cylinder 19) will reach the set value of the pressure relay III18. This relay will then trigger an electrical signal that de-energizes the solenoid 8DT of the solenoid pilot valve IV15. The entire self-moving mechanism of the belt conveyor tail and the self-moving mechanism of the transfer conveyor are completed, and all cylinders return to their initial state.

[0029] Example 1

[0030] The tail self-moving device for mining belt conveyors and the stepping self-moving device for transfer machines include a valve body 1. Above the valve body 1, there are electromagnetic pilot valves I5, II8, III11, and IV15 arranged in sequence. Electromagnetic pilot valve I5 is connected to hydraulic directional valves I3 and II4 respectively; electromagnetic pilot valve II8 is connected to hydraulic directional valves III9 and IV10 respectively; electromagnetic pilot valve III11 is connected to hydraulic directional valves V12 and VI13 respectively; and electromagnetic pilot valve IV15 is connected to hydraulic directional valves VII16 and VIII17 respectively.

[0031] Example 2

[0032] The self-moving tail section of a mining belt conveyor and the stepping self-moving device for a transfer conveyor include a valve body 1. Above the valve body 1 are sequentially mounted electromagnetic pilot valves I5, II8, III11, and IV15. Electromagnetic pilot valve I5 is connected to hydraulically controlled directional valves I3 and II4; electromagnetic pilot valve II8 is connected to hydraulically controlled directional valves III9 and IV10; electromagnetic pilot valve III11 is connected to hydraulically controlled directional valves V12 and VI13; and electromagnetic pilot valve IV15 is connected to hydraulically controlled directional valves VII16 and VIII17. Hydraulically controlled directional valves I3 and II4 are also connected to a two-way lock I6.

[0033] Example 3

[0034] The self-moving tail section of a mining belt conveyor and the stepping self-moving device for a transfer conveyor include a valve body 1. Above the valve body 1 are sequentially mounted electromagnetic pilot valves I5, II8, III11, and IV15. Electromagnetic pilot valve I5 is connected to hydraulically controlled directional valves I3 and II4; electromagnetic pilot valve II8 is connected to hydraulically controlled directional valves III9 and IV10; electromagnetic pilot valve III11 is connected to hydraulically controlled directional valves V12 and VI13; and electromagnetic pilot valve IV15 is connected to hydraulically controlled directional valves VII16 and VIII17. Hydraulically controlled directional valves I3 and II4 are also connected to a two-way lock I6.

[0035] Example 4

[0036] The self-moving tail section of a mining belt conveyor and the stepping self-moving device for a transfer conveyor include a valve body 1. Above the valve body 1 are sequentially mounted electromagnetic pilot valves I5, II8, III11, and IV15. Electromagnetic pilot valve I5 is connected to hydraulically controlled directional valves I3 and II4; electromagnetic pilot valve II8 is connected to hydraulically controlled directional valves III9 and IV10; electromagnetic pilot valve III11 is connected to hydraulically controlled directional valves V12 and VI13; and electromagnetic pilot valve IV15 is connected to hydraulically controlled directional valves VII16 and VIII17. Hydraulicly controlled directional valves I3 and II4 are simultaneously connected to a two-way lock I6. Hydraulicly controlled directional valves V12 and VI13 are simultaneously connected to a two-way lock II14.

[0037] Example 5

[0038] The self-moving tail section of a mining belt conveyor and the stepping self-moving device for a transfer conveyor include a valve body 1. Above the valve body 1 are sequentially mounted electromagnetic pilot valves I5, II8, III11, and IV15. Electromagnetic pilot valve I5 is connected to hydraulically controlled directional valves I3 and II4; electromagnetic pilot valve II8 is connected to hydraulically controlled directional valves III9 and IV10; electromagnetic pilot valve III11 is connected to hydraulically controlled directional valves V12 and VI13; and electromagnetic pilot valve IV15 is connected to hydraulically controlled directional valves VII16 and VIII17. Hydraulicly controlled directional valves I3 and II4 are simultaneously connected to a two-way lock I6. Hydraulicly controlled directional valves V12 and VI13 are simultaneously connected to a two-way lock II14. Hydraulicly controlled directional valve III9 is ​​connected to a pressure relay VII25.

[0039] Example 6

[0040] The self-moving tail section of a mining belt conveyor and the stepping self-moving device for a transfer conveyor include a valve body 1. Above the valve body 1 are sequentially mounted electromagnetic pilot valves I5, II8, III11, and IV15. Electromagnetic pilot valve I5 is connected to hydraulically controlled directional valves I3 and II4; electromagnetic pilot valve II8 is connected to hydraulically controlled directional valves III9 and IV10; electromagnetic pilot valve III11 is connected to hydraulically controlled directional valves V12 and VI13; and electromagnetic pilot valve IV15 is connected to hydraulically controlled directional valves VII16 and VIII17. Hydraulicly controlled directional valves I3 and II4 are simultaneously connected to a two-way lock I6. Hydraulicly controlled directional valves V12 and VI13 are simultaneously connected to a two-way lock II14. Hydraulicly controlled directional valve III9 is ​​connected to a pressure relay VII25. The hydraulic directional valve IV10 is connected to the pressure relay VIII26.

[0041] Example 7

[0042] The self-moving tail section of a mining belt conveyor and the stepping self-moving device for a transfer conveyor include a valve body 1. Above the valve body 1 are sequentially mounted electromagnetic pilot valves I5, II8, III11, and IV15. Electromagnetic pilot valve I5 is connected to hydraulically controlled directional valves I3 and II4; electromagnetic pilot valve II8 is connected to hydraulically controlled directional valves III9 and IV10; electromagnetic pilot valve III11 is connected to hydraulically controlled directional valves V12 and VI13; and electromagnetic pilot valve IV15 is connected to hydraulically controlled directional valves VII16 and VIII17. Hydraulicly controlled directional valves I3 and II4 are simultaneously connected to a two-way lock I6. Hydraulicly controlled directional valves V12 and VI13 are simultaneously connected to a two-way lock II14. Hydraulicly controlled directional valve III9 is ​​connected to a pressure relay VII25. Hydraulic directional valve IV10 is connected to pressure relay VIII26. Hydraulic directional valve VII16 is connected to pressure relay III18.

[0043] Example 8

[0044] The self-moving tail section of a mining belt conveyor and the stepping self-moving device for a transfer conveyor include a valve body 1. Above the valve body 1 are sequentially mounted electromagnetic pilot valves I5, II8, III11, and IV15. Electromagnetic pilot valve I5 is connected to hydraulically controlled directional valves I3 and II4; electromagnetic pilot valve II8 is connected to hydraulically controlled directional valves III9 and IV10; electromagnetic pilot valve III11 is connected to hydraulically controlled directional valves V12 and VI13; and electromagnetic pilot valve IV15 is connected to hydraulically controlled directional valves VII16 and VIII17. Hydraulicly controlled directional valves I3 and II4 are simultaneously connected to a two-way lock I6. Hydraulicly controlled directional valves V12 and VI13 are simultaneously connected to a two-way lock II14. Hydraulicly controlled directional valve III9 is ​​connected to a pressure relay VII25. Hydraulic directional valve IV10 is connected to pressure relay VIII26. Hydraulic directional valve VII16 is connected to pressure relay III18. Hydraulic directional valve VIII17 is connected to pressure relay IV20.

[0045] Example 9

[0046] The self-moving tail section of a mining belt conveyor and the stepping self-moving device for a transfer conveyor include a valve body 1. Above the valve body 1 are sequentially mounted electromagnetic pilot valves I5, II8, III11, and IV15. Electromagnetic pilot valve I5 is connected to hydraulically controlled directional valves I3 and II4; electromagnetic pilot valve II8 is connected to hydraulically controlled directional valves III9 and IV10; electromagnetic pilot valve III11 is connected to hydraulically controlled directional valves V12 and VI13; and electromagnetic pilot valve IV15 is connected to hydraulically controlled directional valves VII16 and VIII17. Hydraulicly controlled directional valves I3 and II4 are simultaneously connected to a two-way lock I6. Hydraulicly controlled directional valves V12 and VI13 are simultaneously connected to a two-way lock II14. Hydraulicly controlled directional valve III9 is ​​connected to a pressure relay VII25. Hydraulic directional valve IV10 is connected to pressure relay VIII26. Hydraulic directional valve VII16 is connected to pressure relay III18. Hydraulic directional valve VIII17 is connected to pressure relay IV20. Pressure relays I2 and II7 are connected to the two-way lock I6.

[0047] Example 10

[0048] The self-moving tail section of a mining belt conveyor and the stepping self-moving device for a transfer conveyor include a valve body 1. Above the valve body 1 are sequentially mounted electromagnetic pilot valves I5, II8, III11, and IV15. Electromagnetic pilot valve I5 is connected to hydraulically controlled directional valves I3 and II4; electromagnetic pilot valve II8 is connected to hydraulically controlled directional valves III9 and IV10; electromagnetic pilot valve III11 is connected to hydraulically controlled directional valves V12 and VI13; and electromagnetic pilot valve IV15 is connected to hydraulically controlled directional valves VII16 and VIII17. Hydraulicly controlled directional valves I3 and II4 are simultaneously connected to a two-way lock I6. Hydraulicly controlled directional valves V12 and VI13 are simultaneously connected to a two-way lock II14. Hydraulicly controlled directional valve III9 is ​​connected to a pressure relay VII25. Hydraulic directional valve IV10 is connected to pressure relay VIII26. Hydraulic directional valve VII16 is connected to pressure relay III18. Hydraulic directional valve VIII17 is connected to pressure relay IV20. Pressure relays I2 and II7 are connected to bidirectional lock I6. Pressure relays V22 and VI23 are connected to bidirectional lock II14.

Claims

1. A self-moving tail section device for mining belt conveyors and a stepping self-moving device for transfer conveyors, characterized in that: The valve body (1) is provided with electromagnetic pilot valve I (5), electromagnetic pilot valve II (8), electromagnetic pilot valve III (11) and electromagnetic pilot valve IV (15) respectively on the top of the valve body (1). Electromagnetic pilot valve I (5) is connected to hydraulic directional valve I (3) and hydraulic directional valve II (4) respectively; electromagnetic pilot valve II (8) is connected to hydraulic directional valve III (9) and hydraulic directional valve IV (10) respectively; electromagnetic pilot valve III (11) is connected to hydraulic directional valve V (12) and hydraulic directional valve VI (13) respectively; electromagnetic pilot valve IV (15) is connected to hydraulic directional valve VII (16) and hydraulic directional valve VIII (17) respectively.

2. The self-moving tail section device for mining belt conveyors and the stepping self-moving device for transfer conveyors according to claim 1, characterized in that: The hydraulic control directional valve I (3) and the hydraulic control directional valve II (4) are simultaneously connected to the bidirectional lock I (6).

3. The self-moving tail section device for mining belt conveyors and the stepping self-moving device for transfer conveyors according to claim 1, characterized in that: The hydraulic control directional valve V (12) and the hydraulic control directional valve VI (13) are simultaneously connected to the bidirectional lock II (14).

4. The self-moving tail section device for mining belt conveyors and the stepping self-moving device for transfer conveyors according to claim 1, characterized in that: The hydraulic control directional valve III (9) is connected to the pressure relay VII (25).

5. The self-moving tail section device for mining belt conveyors and the stepping self-moving device for transfer conveyors according to claim 1, characterized in that: The hydraulic directional valve IV (10) is connected to the pressure relay VIII (26).

6. The self-moving tail section device for mining belt conveyors and the stepping self-moving device for transfer conveyors according to claim 1, characterized in that: The hydraulic control directional valve VII (16) is connected to the pressure relay III (18).

7. The self-moving tail section device for mining belt conveyors and the stepping self-moving device for transfer conveyors according to claim 1, characterized in that: The hydraulic control directional valve VIII (17) is connected to the pressure relay IV (20).

8. The self-moving tail section device for mining belt conveyors and the stepping self-moving device for transfer conveyors according to claim 2, characterized in that: Pressure relay I (2) and pressure relay II (7) are respectively connected to the bidirectional lock I (6).

9. The self-moving tail section device for mining belt conveyors and the stepping self-moving device for transfer conveyors according to claim 3, characterized in that: Pressure relays V (22) and VI (23) are connected to the bidirectional lock II (14).

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