Belt conveyor sealing cover, belt conveyor device and earth pressure shield machine

Abstract

The utility model provides a belt conveyor sealing cover, a belt conveyor device and an earth pressure shield machine, and belongs to the technical field of tunneling equipment. The belt conveyor sealing cover comprises a cover body, a slag falling space is arranged at the bottom in the cover body, a slag outlet is formed in the position, corresponding to the slag falling space, of the bottom of the cover body, a sealing body is arranged at the position of the slag outlet, and the sealing body is provided with a sealing position for sealing the slag outlet and an opening position for opening the slag outlet. And a switching structure for switching the closing body between the opening position and the closing position is arranged between the closing body and the slag outlet. The belt conveyor device comprises a deslagging belt conveyor and the belt conveyor sealing cover. The earth pressure shield tunneling machine comprises the belt conveyor device. The slag falling space is arranged in the cover body, and the slag discharging opening used for discharging the slag is formed in the slag falling space, so that the slag which does not fall onto the slag discharging belt conveyor can be discharged in time, and the situation that the normal operation of the slag discharging belt conveyor is affected due to accumulation of the slag is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel excavation equipment, in particular to a belt conveyor closing cover, a belt conveyor device and an earth pressure shield machine. Background Art

[0002] During tunnel construction, strata containing flammable, explosive, or toxic and hazardous substances are often encountered. When using conventional belt conveyors to transport the excavated soil, the flammable, explosive, or toxic and hazardous substances can easily overflow from the excavated soil and spread into the tunnel, threatening the safety of construction workers in the tunnel.

[0003] The Chinese invention patent application with the existing application publication number CN115744157A and the application publication date March 7, 2023 discloses a continuous belt conveyor device, which is provided with a closed cover on the outside of the front section of the belt conveyor, and the front end of the closed cover is sealed and connected to the slag outlet of the screw conveyor through a soft connection, which not only ensures the sealing performance, but also can adapt to the relative position change of the screw conveyor and the closed cover. The closed cover can prevent the diffusion of asbestos fibers during the transportation of slag and ensure the safety of construction personnel in the tunnel.

[0004] In the process of the slag falling from the slag outlet of the screw conveyor to the belt conveyor, the stability of the slag is poor due to the collision between the slag and the belt conveyor, and the slag is easy to fall from both sides of the belt conveyor. In the above technical scheme, since a closed cover is provided at the front end of the belt conveyor, the slag that has not fallen onto the belt conveyor will accumulate in the closed cover, and the space for the accumulated slag is the slag falling space. The above technical scheme cannot clean the slag in the slag falling space in time, which is easy to affect the normal operation of the belt conveyor. Utility Model Content

[0005] One of the purposes of the utility model is to provide a belt conveyor closing cover to solve the technical problem in the prior art that the slag that has not fallen onto the belt conveyor is accumulated in the closing cover and is not convenient to be cleaned in time, thus affecting the normal operation of the belt conveyor.

[0006] One of the purposes of the utility model is to provide a belt conveyor device, which has solved the above technical problems.

[0007] One of the purposes of the utility model is to provide an earth pressure shield machine to solve the above technical problems.

[0008] In order to achieve the above-mentioned purpose, the technical solution of the belt conveyor closing cover provided by the utility model is:

[0009] A belt conveyor closed cover comprises a cover body, a slag falling space is arranged at the bottom of the cover body, a slag outlet is arranged at a position of the cover body bottom corresponding to the slag falling space, an openable and closable closing body is arranged at the slag outlet, the closing body has a closed position for closing the slag outlet and an open position for opening the slag outlet, and the closing body is configured with a switching structure for switching the closing body between the open position and the closed position.

[0010] As a further improvement, a funnel structure is provided at the bottom of the cover body, the inner cavity of the funnel structure constitutes a slag falling space, and the lower end opening of the funnel structure constitutes a slag outlet.

[0011] As a further improvement, a connection port for sealing connection with the screw conveyor is provided on the cover body, and a slag ramp is provided at the bottom of the cover body corresponding to the connection port, and the slag falling space is located at the inclined lower end of the slag ramp.

[0012] As a further improvement, the closing body is a gate plate, and the switching structure includes a track for guiding the gate plate, and the gate plate can reach an open position and a closed position during movement along the track.

[0013] As a further improvement, the switching structure also includes a driving mechanism for driving the gate plate to move, the driving mechanism includes a rotating shaft and a mounting frame for installing the rotating shaft, the rotating shaft and the mounting frame are rotatably matched, the rotating shaft has a threaded section, and a transmission body is provided on the gate plate, and the transmission body is threadedly matched with the rotating shaft.

[0014] As a further improvement, the mounting frame is a closed box structure, and a matching hole for rotationally matching with the rotating shaft is provided on one end wall of the mounting frame, and the threaded section of the rotating shaft is located inside the mounting frame.

[0015] As a further improvement, the switching structure includes two mounting seats that are interlocked and connected, one of which is connected to the cover body, and each mounting seat is provided with a slag discharge channel corresponding to and connected to the slag discharge port. The gate plate is located between the two mounting seats, and at least one mounting seat is provided with a slide groove for accommodating the gate plate and allowing the gate plate to slide out of the slag discharge channel. After the two mounting seats are interlocked, the space in the slide groove constitutes a track.

[0016] As a further improvement, the mounting seat includes a connecting portion and a guiding portion connected to each other, the slag discharge channel is located at the connecting portion, and the chute passes through the guiding portion and connects one end of the guiding portion away from the connecting portion with the slag discharge channel.

[0017] As a further improvement, a sealing strip is provided between the connecting parts of the two mounting seats for pressing against and sealing with the edge of the gate plate when the gate plate reaches the closed position, and a sealing member is provided between the guide part and the gate plate for slidingly cooperating with the gate plate during the movement of the gate plate and sealingly cooperating with the gate plate when the gate plate is in the closed position.

[0018] The beneficial effect is that the belt conveyor closing cover provided by the utility model is an improvement on the prior art. During the normal excavation of the shield machine, the closing body is in the closing position, and the gate is closed to prevent the leakage of flammable and explosive gases or toxic and harmful gases. The slag that has not fallen onto the slag conveyor will be temporarily stored in the slag falling space. After a certain amount of slag is stored in the slag falling space, the closing body can be made to reach the open position. At this time, the slag outlet is opened, and the slag will be discharged from the slag outlet under the action of gravity. After the slag is discharged, the closing body is returned to the closed position. Compared with the prior art, the belt conveyor closing cover can quickly and conveniently discharge the slag that has not fallen onto the slag conveyor, and prevent the slag from accumulating too much in the cover body and affecting the normal operation of the slag conveyor.

[0019] In order to achieve the above-mentioned purpose, the technical solution of the belt conveyor device provided by the utility model is:

[0020] A belt conveyor device comprises a slag discharge belt conveyor, the outer sleeve of the slag discharge belt conveyor is provided with a belt conveyor closing cover, the belt conveyor closing cover comprises a cover body, a slag falling space is arranged at the bottom of the cover body, a slag discharge port is arranged at a position corresponding to the slag falling space at the bottom of the cover body, an openable and closable closing body is arranged at the slag discharge port, the closing body has a closing position for closing the slag discharge port and an opening position for opening the slag discharge port, and the closing body is provided with a switching structure for switching the closing body between the opening position and the closing position.

[0021] As a further improvement, a funnel structure is provided at the bottom of the cover body, the inner cavity of the funnel structure constitutes a slag falling space, and the lower end opening of the funnel structure constitutes a slag outlet.

[0022] As a further improvement, a connection port for sealing connection with the screw conveyor is provided on the cover body, and a slag ramp is provided at the bottom of the cover body corresponding to the connection port, and the slag falling space is located at the inclined lower end of the slag ramp.

[0023] As a further improvement, the closing body is a gate plate, and the switching structure includes a track for guiding the gate plate, and the gate plate can reach an open position and a closed position during movement along the track.

[0024] As a further improvement, the switching structure also includes a driving mechanism for driving the gate plate to move, the driving mechanism includes a rotating shaft and a mounting frame for installing the rotating shaft, the rotating shaft and the mounting frame are rotatably matched, the rotating shaft has a threaded section, and a transmission body is provided on the gate plate, and the transmission body is threadedly matched with the rotating shaft.

[0025] As a further improvement, the mounting frame is a closed box structure, and a matching hole for rotationally matching with the rotating shaft is provided on one end wall of the mounting frame, and the threaded section of the rotating shaft is located inside the mounting frame.

[0026] As a further improvement, the switching structure includes two mounting seats that are interlocked and connected, one of which is connected to the cover body, and each mounting seat is provided with a slag discharge channel corresponding to and connected to the slag discharge port. The gate plate is located between the two mounting seats, and at least one mounting seat is provided with a slide groove for accommodating the gate plate and allowing the gate plate to slide out of the slag discharge channel. After the two mounting seats are interlocked, the space in the slide groove constitutes a track.

[0027] As a further improvement, the mounting seat includes a connecting portion and a guiding portion connected to each other, the slag discharge channel is located at the connecting portion, and the chute passes through the guiding portion and connects one end of the guiding portion away from the connecting portion with the slag discharge channel.

[0028] As a further improvement, a sealing strip is provided between the connecting parts of the two mounting seats for pressing against and sealing with the edge of the gate plate when the gate plate reaches the closed position, and a sealing member is provided between the guide part and the gate plate for slidingly cooperating with the gate plate during the movement of the gate plate and sealingly cooperating with the gate plate when the gate plate is in the closed position.

[0029] The beneficial effect is that the belt conveyor device provided by the utility model is an improvement on the prior art. During the normal excavation of the shield machine, the closing body is in the closed position, and the gate is closed to prevent the leakage of flammable and explosive gases or toxic and harmful gases. The slag that has not fallen onto the slag discharge belt conveyor will be temporarily stored in the slag falling space. After a certain amount of slag is stored in the slag falling space, the closing body can be made to reach the open position. At this time, the slag discharge port is opened, and the slag will be discharged from the slag discharge port under the action of gravity. After the slag is discharged, the closing body is returned to the closed position. Compared with the prior art, the belt conveyor device can quickly and conveniently discharge the slag that has not fallen onto the slag discharge belt conveyor, and prevent the slag from accumulating too much in the cover body and affecting the normal operation of the slag discharge belt conveyor.

[0030] To achieve the above purpose, the technical solution of the earth pressure shield machine provided by the utility model is:

[0031] A soil pressure shield machine comprises a shield body and a screw conveyor installed on the shield body, the tail of the screw conveyor is connected to a belt conveyor device, the belt conveyor device comprises a slag discharge belt conveyor, the outer sleeve of the slag discharge belt conveyor is provided with a belt conveyor closing cover, the belt conveyor closing cover comprises a cover body, a slag falling space is arranged at the bottom of the cover body, a slag discharge port is arranged at a position corresponding to the slag falling space at the bottom of the cover body, an openable and closable closing body is arranged at the slag discharge port, the closing body has a closing position for closing the slag discharge port and an opening position for opening the slag discharge port, and the closing body is provided with a switching structure for switching the closing body between the opening position and the closing position.

[0032] As a further improvement, a funnel structure is provided at the bottom of the cover body, the inner cavity of the funnel structure constitutes a slag falling space, and the lower end opening of the funnel structure constitutes a slag outlet.

[0033] As a further improvement, a connection port for sealing connection with the screw conveyor is provided on the cover body, and a slag ramp is provided at the bottom of the cover body corresponding to the connection port, and the slag falling space is located at the inclined lower end of the slag ramp.

[0034] As a further improvement, the closing body is a gate plate, and the switching structure includes a track for guiding the gate plate, and the gate plate can reach an open position and a closed position during movement along the track.

[0035] As a further improvement, the switching structure also includes a driving mechanism for driving the gate plate to move, the driving mechanism includes a rotating shaft and a mounting frame for installing the rotating shaft, the rotating shaft and the mounting frame are rotatably matched, the rotating shaft has a threaded section, and a transmission body is provided on the gate plate, and the transmission body is threadedly matched with the rotating shaft.

[0036] As a further improvement, the mounting frame is a closed box structure, and a matching hole for rotationally matching with the rotating shaft is provided on one end wall of the mounting frame, and the threaded section of the rotating shaft is located inside the mounting frame.

[0037] As a further improvement, the switching structure includes two mounting seats that are interlocked and connected, one of which is connected to the cover body, and each mounting seat is provided with a slag discharge channel corresponding to and connected to the slag discharge port. The gate plate is located between the two mounting seats, and at least one mounting seat is provided with a slide groove for accommodating the gate plate and allowing the gate plate to slide out of the slag discharge channel. After the two mounting seats are interlocked, the space in the slide groove constitutes a track.

[0038] As a further improvement, the mounting seat includes a connecting portion and a guiding portion connected to each other, the slag discharge channel is located at the connecting portion, and the chute passes through the guiding portion and connects one end of the guiding portion away from the connecting portion with the slag discharge channel.

[0039] As a further improvement, a sealing strip is provided between the connecting parts of the two mounting seats for pressing against and sealing with the edge of the gate plate when the gate plate reaches the closed position, and a sealing member is provided between the guide part and the gate plate for slidingly cooperating with the gate plate during the movement of the gate plate and sealingly cooperating with the gate plate when the gate plate is in the closed position.

[0040] The beneficial effect is that the earth pressure shield machine provided by the utility model is an improvement on the prior art. During the normal excavation of the shield machine, the closing body is in the closed position, and the gate is closed to prevent the leakage of flammable and explosive gases or toxic and harmful gases. The slag that has not fallen onto the slag conveyor will be temporarily stored in the slag falling space. After a certain amount of slag is stored in the slag falling space, the closing body can be made to reach the open position. At this time, the slag outlet is opened, and the slag will be discharged from the slag outlet under the action of gravity. After the slag is discharged, the closing body is returned to the closed position. Compared with the prior art, the belt conveyor closing cover in the earth pressure shield machine can quickly and conveniently discharge the slag that has not fallen onto the slag conveyor, and prevent the slag from accumulating too much in the cover body and affecting the normal operation of the slag conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the overall structure of an embodiment of an earth pressure shield machine in the utility model;

[0042] Figure 2 A cross-sectional view of an embodiment of an earth pressure shield machine in the utility model;

[0043] Figure 3 It is a partial structural schematic diagram of an embodiment of an earth pressure shield machine in the utility model;

[0044] Figure 4 It is a structural schematic diagram of the front part of the belt conveyor enclosing cover in the embodiment of the earth pressure shield machine in the utility model;

[0045] Figure 5 It is a structural schematic diagram of a mounting seat and a gate plate in an embodiment of a soil pressure shield machine in the utility model;

[0046] Figure 6 It is a cross-sectional view of a mounting seat and a gate plate in an embodiment of an earth pressure shield machine in the utility model.

[0047] Description of reference numerals:

[0048] 1. Shield; 2. Screw conveyor; 3. Cutter head; 4. Slag conveyor belt; 5. Soil bin; 6. Cover; 7. Funnel structure; 8. Connection port; 9. Slag ramp; 10. Rear supporting trailer; 11. Mounting seat; 111. Connection part; 112. Guide part; 12. Slag channel; 13. First connecting flange; 14. Second connecting flange; 15. Gate; 16. Slide; 17. Mounting frame; 18. Rotating shaft; 19. Transmission body; 20. Handle; 21. Sealing strip; 22. Sealing member; 23. Receiving groove; 24. Pressing member. DETAILED DESCRIPTION

[0049] The present invention is further described in detail below in conjunction with the embodiments.

[0050] In order to solve the problems in the prior art, the basic concept of the utility model is to set a slag falling space in the cover body, and to set a slag discharge port for discharging slag at the slag falling space, and to set a closing body for closing the slag discharge port at the slag discharge port, so that the slag that has not fallen onto the slag discharge belt conveyor can be discharged in time to prevent the slag from accumulating and affecting the normal operation of the slag discharge belt conveyor.

[0051] The specific embodiment of the earth pressure shield machine provided by the utility model is as follows:

[0052] An earth pressure shield machine, see attached Figure 1 and attached Figure 2, including a shield body 1, a screw conveyor 2 arranged on the shield body 1, a cutter disc 3 arranged in front of the shield body 1, a rear supporting trailer 10 arranged behind the shield body 1, a slag conveyor 4 arranged on the rear supporting trailer 10, and a belt conveyor closure cover sleeved outside the slag conveyor 4. A soil bin 5 is arranged between the shield body 1 and the cutter disc 3, the front end of the screw conveyor 2 is connected to the soil bin 5, the rear end of the screw conveyor 2 is located directly above the front end of the slag conveyor 4, and the rear end of the screw conveyor 2 is sealed and connected to the belt conveyor closure cover through a soft connection. Among them, the slag conveyor 4 and the belt conveyor closure cover together constitute a belt conveyor device.

[0053] Since the screw conveyor 2 is sealed and connected to the belt conveyor closure cover, during the excavation process, the inflammable and explosive gas or toxic and harmful gas in the soil layer will enter the belt conveyor closure cover through the screw conveyor 2, thereby preventing the inflammable and explosive gas or toxic and harmful gas from spreading in the tunnel. After adding air intake and exhaust pipes to the belt conveyor closure cover, the inflammable and explosive gas or toxic and harmful gas can be discharged in time.

[0054] See attached Figure 3 and attached Figure 4 The belt conveyor closed cover includes a cover body 6. Since the front part of the slag conveyor 4 extends obliquely and the rear part extends horizontally, the cover body 6 also has an inclined section and a horizontal section accordingly. The top of the inclined section of the cover body 6 is provided with a connection port 8 for sealing connection with the screw conveyor 2. The bottom of the inclined section of the cover body 6 and the position corresponding to the connection port 8 constitute a slag sliding ramp 9. The inclined lower end of the slag sliding ramp 9 (i.e., the front bottom of the inclined section) is provided with a slag falling space.

[0055] The slag discharged from the tail end of the screw conveyor 2 will enter the belt conveyor closed cover from the connection port 8, and most of the slag will fall directly onto the slag discharge belt conveyor 4 and be transported backward by the slag discharge belt conveyor 4; a small part of the slag will fall from both sides of the slag discharge belt conveyor 4 during the falling process, and finally fall onto the slag sliding ramp 9, and slide down along the slag sliding ramp 9 into the slag falling space. The slag sliding ramp 9 utilizes the inclined section of the cover body 6 itself to guide the slag forward and prevent the slag from accumulating below the connection port 8.

[0056] The cover body 6 includes a main body and a funnel structure 7 located at the oblique lower end of the slag ramp 9. The inner cavity of the funnel structure 7 constitutes a slag falling space. The lower end opening of the funnel structure 7 is circular and serves as a slag outlet for discharging slag. By using the inner cavity of the funnel structure 7 as the slag falling space, on the one hand, the inner cavity of the funnel structure 7 can be used to store more slag, and on the other hand, the funnel structure 7 can be used to guide the slag so that the slag can be discharged more smoothly.

[0057] A closing body is provided at the slag outlet, and the closing body has a closing position for closing the slag outlet and an opening position for opening the slag outlet, and a switching structure for switching the closing body between the opening position and the closing position is provided between the closing body and the slag outlet. During normal excavation, the closing body can be placed in the closing position to prevent the leakage of flammable and explosive gases or toxic and harmful gases in the belt conveyor closing cover; after a certain amount of slag is stored in the slag falling space, the closing body can be moved to the opening position to open the slag outlet, and the closing body can be moved to the closing position again after the slag in the slag falling space is discharged.

[0058] See attached Figure 5 and attached Figure 6 The switching structure includes two mutually buckled and connected mounting seats 11, each mounting seat 11 includes a connecting portion 111 and a guiding portion 112, the connecting portion 111 is annular, the central holes of the two connecting portions 111 each constitute a slag discharge channel 12, the guiding portion 112 is integrally connected to the outer side of the connecting portion 111, and the guiding portion 112 is a rectangular structure. After the two mounting seats 11 are buckled with each other, the guiding portions 112 are correspondingly connected, and the connecting portions 111 are also correspondingly connected, and the slag discharge channels 12 on the two mounting seats 11 are aligned and connected. Bolt holes are provided at the edge of the mounting seat 11 so that the two mounting seats 11 can be connected to each other by bolts.

[0059] A first connecting flange 13 is coaxially arranged at the connecting portion 111 of the upper mounting seat 11, and a second connecting flange 14 is arranged at the slag outlet at the lower end of the funnel structure 7. The mounting seat 11 is connected to the lower end of the funnel structure 7 through the cooperation of the first connecting flange 13 and the second connecting flange 14, so that the slag outlet is connected to the slag outlet channel 12.

[0060] The closing body is a gate plate 15, one end of which in the length direction is a semicircular arc structure and faces the slag discharge channel 12. The gate plate 15 is located between the two mounting seats 11. The mounting seats 11 are provided with a chute 16 on one side close to each other for accommodating the gate plate 15 and allowing the gate plate 15 to slide radially along the slag discharge channel 12. The chute 16 penetrates the guide portion 112 and connects the end of the guide portion 112 away from the connecting portion 111 with the slag discharge channel 12. The groove depth of the chute 16 is half the thickness of the gate plate 15. After the two mounting seats 11 are buckled together, the chute 16 on the two mounting seats 11 are buckled correspondingly, and the space in the two chute 16 constitutes a track for guiding the sliding of the gate plate 15.

[0061] The switching structure also includes a driving mechanism for driving the gate plate 15 to move. The driving mechanism includes a mounting frame 17 fixedly mounted on one end of the guide portion 112 away from the connecting portion 111. The mounting frame 17 is a box structure, and all sides of the mounting frame 17 are in a closed state. A matching hole is provided on the end wall of the mounting frame 17 away from the guide portion 112. A rotating shaft 18 is provided in the matching hole, which can rotate relative to the matching hole but cannot move axially. One end of the rotating shaft 18 extends into the mounting frame 17, and the other end extends out of the mounting frame 17. The part of the rotating shaft 18 extending into the mounting frame 17 is a threaded section with external threads. One end of the gate plate 15 away from the slag discharge channel 12 extends out of the guide portion 112 and is fixedly connected to a transmission body 19. A threaded hole is formed on the transmission body 19, and the threaded hole cooperates with the threaded section of the rotating shaft 18, so that when the rotating shaft 18 rotates, the transmission body 19 moves along the axial direction of the rotating shaft 18, thereby driving the gate plate 15 to move along the axial direction of the rotating shaft 18, and completing the switching between the closed position and the open position. In other embodiments, the transmission body 19 may also be a part of the gate plate 15 .

[0062] The threaded section is arranged inside the mounting frame 17, which can protect the threaded section and prevent the debris from falling on the threaded section and affecting the normal cooperation between the threaded section and the transmission body 19. A wheel-shaped handle 20 is installed at one end of the rotating shaft 18 extending from the mounting frame 17, so that the operator can manually rotate the rotating shaft 18 to control the movement of the gate 15. In other embodiments, a motor for driving the rotating shaft 18 to rotate can also be installed at the end of the rotating shaft 18, and the movement of the gate 15 can be more conveniently controlled by the motor.

[0063] A sealing strip 21 is provided between the connection parts 111 of the two mounting seats 11, and the sealing strip 21 is arranged on the inner side of the connection part 111, so that when the gate 15 moves to the closed position, the edge of the gate 15 can be pressed against the sealing strip 21 to achieve a better seal. Since the gate 15 needs to slide in the slide groove 16, the sealing strip 21 cannot be provided in the slide groove 16. In order to ensure the sealing at this place, a sealing member 22 is provided between the guide part 112 and the gate 15. A receiving groove 23 is provided on the side of the guide portion 112 facing the gate plate 15, and the seal 22 is arranged in the receiving groove 23. The receiving groove 23 penetrates the end wall of the guide portion 112 away from the connecting portion 111. A pressing member 24 is provided at one end wall of the guide portion 112 away from the connecting portion 111. The pressing member 24 is connected to the guide portion 112 by bolts. One end of the pressing member 24 extends into the receiving groove 23 and presses the seal 22. After the seal 22 is compressed, it will deform in the thickness direction of the gate plate 15, so as to closely contact with the gate plate 15 to achieve better sealing. The gate plate 15 will move relative to the seal 22 during the movement process. Therefore, in order to further improve the sealing effect at this location, multiple seals 22 are provided along the moving direction of the gate plate 15. Each seal 22 is in the shape of a long strip, and the length direction of the seal 22 is perpendicular to the moving direction of the gate plate 15.

[0064] In the above embodiments, the slag outlet is set to be circular, which can facilitate smooth slag discharge. In other embodiments, the slag outlet can be square, and the inner hole of the connecting part, that is, the slag discharge channel, is also square.

[0065] In the above embodiments, a funnel structure is provided on the cover body to collect the slag so as to facilitate the slag discharge. In other embodiments, the funnel structure may not be provided on the cover body. In this embodiment, the slag discharge port is directly opened at the oblique lower end of the slag chute ramp, and the space in the cover body located at the oblique lower end of the slag chute ramp constitutes a slag falling space. After sliding along the slag chute ramp to the slag falling space, the slag accumulates in the slag falling space. The slag can also be discharged after the slag discharge port is opened, thereby realizing the cleaning of the slag.

[0066] In the above embodiments, the slag ramp utilizes the original inclined section of the cover body, and can also transfer the slag to other positions to prevent accumulation below the connection port. In other embodiments, if there is enough space below the slag conveyor corresponding to the connection port to accommodate the slag (the space below the slag conveyor constitutes the slag falling space), the slag ramp may not be provided, and the bottom of the cover body at that location may be provided as a horizontal plate and the slag outlet may be opened on the horizontal plate, or the bottom of the cover body at that location may be provided as a funnel structure, and the lower end opening of the funnel structure may be used as the slag outlet.

[0067] In the above embodiments, the sealing strip and the sealing member are provided to improve the sealing effect between the gate and the mounting seat. In other embodiments, if the gate and the mounting seat are closely matched to obtain a good sealing effect, the sealing strip and the sealing member may not be provided.

[0068] In the above embodiments, the guide portion is provided to extend the guiding length of the rail to the gate plate and improve the stability of the gate plate during movement. In other embodiments, the mounting seat may also include only a connecting portion without a guide portion, and a slide groove is provided on the connecting portion to connect the inner side of the connecting portion with the outer side, which can also guide the gate plate.

[0069] In the above embodiments, both mounting seats are provided with slide grooves, and when the two mounting seats are engaged with each other, the slide grooves are also engaged with each other, thereby forming a track. In other embodiments, only one of the mounting seats may be provided with a slide groove, and when the two mounting seats are engaged with each other, the space enclosed by the mounting seat without the slide groove and the side wall of the slide groove forms a track.

[0070] In the above embodiment, the two mounting seats are of separate structures, which can facilitate the manufacture of the mounting seats and the assembly of the gate plate. In other embodiments, the two mounting seats can also be of an integrated structure. A long hole is provided on the outer wall of the integrated mounting seat along its radial direction. The long hole connects the inner and outer sides of the integrated mounting seat. The long hole forms a track. After the gate plate is inserted into the long hole from the outside of the integrated mounting seat, the gate plate can be continued to be pushed forward, or one end of the gate plate can be pushed into the slag discharge channel to cut off the slag discharge channel and then close the slag discharge port.

[0071] In the above embodiments, the mounting frame is configured as a box structure to prevent debris from falling onto the threaded section of the shaft and thus affecting the cooperation between the threaded section and the transmission body. In other embodiments, the mounting frame may also be a frame structure.

[0072] In the above embodiments, the transmission is carried out by the threaded cooperation between the rotating shaft and the transmission body, and the threaded cooperation can be used to achieve self-locking, so that the gate can maintain good stability when it is in the closed position. In other embodiments, the driving mechanism can also be a cylinder, in which the cylinder body of the cylinder is fixedly mounted on the mounting frame, and the piston rod end of the cylinder is fixedly connected to the gate. In other embodiments, the driving mechanism may not be provided, and in which the gate is manually pulled out or pushed in to switch the gate between the closed position and the open position.

[0073] In the above embodiments, the closing body is a gate plate, and the gate plate is used to close the slag outlet, which can be conveniently set up a driving mechanism and facilitate the operation of the operator. In other embodiments, the closing body can also have other structures. For example, the closing body can be a flip cover hinged at the slag outlet, and the flip cover can be buckled at the slag outlet after flipping to close the slag outlet. At this time, the flip cover is in a closed position, and after the flip cover flips to open the slag outlet, the flip cover is in an open position; a lock is set between the flip cover and the slag outlet, and after the flip cover is in a closed position, the flip cover can be locked by the lock to keep it in the closed position. In this embodiment, the lock and the hinged structure constitute a switching structure. The closing body can also be an end cover detachably connected to the slag outlet, and the end cover can be connected to the slag outlet through a flange structure, or it can be connected to the slag outlet through a threaded manner. When the end cover is connected to the slag outlet, the rear end cover is in a closed position, and the end cover is removed from the slag outlet. The rear end cover is in an open position. In this embodiment, the flange structure and the threaded structure constitute a switching structure.

[0074] The specific embodiment of the belt conveyor device provided by the utility model:

[0075] The belt conveyor device is the belt conveyor device in the above-mentioned embodiment of the earth pressure shield machine, and will not be described in detail here.

[0076] The specific embodiment of the belt conveyor closing cover provided by the utility model is as follows:

[0077] The belt conveyor closing cover is the belt conveyor closing cover in the above-mentioned embodiment of the earth pressure shield machine, and will not be described in detail here.

[0078] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A belt conveyor closed cover, comprising a cover body, wherein a slag falling space is provided at the bottom of the cover body, wherein: A slag outlet is arranged at a position at the bottom of the cover body corresponding to the slag falling space, and an openable and closable closing body is arranged at the slag outlet. The closing body has a closing position for closing the slag outlet and an opening position for opening the slag outlet. The closing body is configured with a switching structure for switching the closing body between the open position and the closed position.

2. The belt conveyor closure cover according to claim 1, characterized in that: A funnel structure is provided at the bottom of the cover body, the inner cavity of the funnel structure constitutes a slag falling space, and the lower end opening of the funnel structure constitutes a slag outlet.

3. The belt conveyor closure cover according to claim 1 or 2, characterized in that: A connection port for sealing connection with a screw conveyor is arranged on the cover body, a slag sliding ramp is arranged at a position corresponding to the connection port at the bottom of the cover body, and the slag falling space is located at the oblique lower end of the slag sliding ramp.

4. The belt conveyor closure cover according to claim 1 or 2, characterized in that: The closing body is a gate plate, and the switching structure includes a track for guiding the gate plate. The gate plate can reach an open position and a closed position during movement along the track.

5. The belt conveyor enclosure according to claim 4, characterized in that: The switching structure also includes a driving mechanism for driving the gate to move. The driving mechanism includes a rotating shaft and a mounting frame for installing the rotating shaft. The rotating shaft and the mounting frame are rotatably matched. The rotating shaft has a threaded section. A transmission body is provided on the gate, and the transmission body is threadedly matched with the rotating shaft.

6. The belt conveyor enclosure according to claim 5, characterized in that: The mounting frame is a closed box structure. A matching hole for rotationally matching with the rotating shaft is arranged on one end wall of the mounting frame. The threaded section of the rotating shaft is located inside the mounting frame.

7. The belt conveyor enclosure according to claim 4, characterized in that: The switching structure includes two mounting seats that are interlocked and connected, one of which is connected to the cover body, and each mounting seat is provided with a slag discharge channel corresponding to and connected to the slag discharge port. The gate plate is located between the two mounting seats, and at least one mounting seat is provided with a slide groove for accommodating the gate plate and allowing the gate plate to slide out of the slag discharge channel. After the two mounting seats are interlocked, the space in the slide groove constitutes a track.

8. The belt conveyor enclosure according to claim 7, characterized in that: The mounting seat comprises a connecting portion and a guiding portion which are connected to each other. The slag discharge channel is located at the connecting portion. The chute penetrates the guiding portion and connects one end of the guiding portion away from the connecting portion with the slag discharge channel.

9. The belt conveyor enclosure according to claim 8, characterized in that: A sealing strip is provided between the connecting parts of the two mounting seats for pressing against and sealing the edge of the gate plate when the gate plate reaches the closed position, and a sealing member is provided between the guide part and the gate plate for slidingly cooperating with the gate plate during its movement and sealingly cooperating with the gate plate when the gate plate is in the closed position.

10. A belt conveyor device, including a slag discharge belt conveyor, characterized in that: The exterior of the slag conveyor is provided with a belt conveyor closing cover as described in any one of claims 1 to 9.

11. An earth pressure shield machine, comprising a shield body and a screw conveyor mounted on the shield body, characterized in that: The tail of the screw conveyor is connected to the belt conveyor device according to claim 10.

Images