Novel conveying device for turning and opening door of heading machine

Abstract

A novel conveying device for turning and door opening of a heading machine is characterized in that a rotatable cantilever type belt conveyor is mounted between the heading machine and a secondary transport reversed loader, when the heading machine turns, the secondary transport reversed loader is detached from the heading machine, the cantilever type belt conveyor is mounted at the tail of the heading machine, and meanwhile, a sliding shoe self-moving device is mounted on the secondary transport reversed loader; and the coal gangue passes through the cantilever type belt conveyor to the second-conveying reversed loader provided with the sliding shoe self-moving device, and then is conveyed to the main belt conveyor. Aiming at the existing conveying process of turning and door opening of the heading machine, the process device is simpler and more effective, the potential safety hazard of a working surface can be reduced, and the safety of operating personnel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of underground transportation equipment in mines, in particular to a new type of conveying device for a tunneling machine with a turning door. Background Art

[0002] At present, using a tunnel boring machine to directly turn and open the door in the underground tunnel is a more mechanized construction method. However, the length of the tunnel boring machine is generally close to 10 meters, which has exceeded the width of the coal mine. The conventional matching method of tunnel boring machine to the second operating carrier and then to the belt conveyor is difficult to continue to use. The second operating carrier needs to be dismantled and a scraper conveyor installed. The scraper conveyor is overlapped to the tail of the belt conveyor. A side unloading chute is installed at the tail of the first conveyor of the tunnel boring machine. The coal gangue is unloaded to the scraper conveyor through the chute. The coal gangue is shoveled to the scraper conveyor by hand to complete the transfer operation. However, in the above process, there are many links in the installation, extension, and removal of the scraper conveyor, which not only takes a long time and has low efficiency, but also has the disadvantages of high labor intensity, complex working environment, and poor safety. Summary of the invention

[0003] The utility model aims to provide a novel conveying device for turning and opening doors of a tunnel boring machine, adopts a cantilever belt conveyor to replace a scraper conveyor, and arranges a self-moving sliding shoe under a second operating carrier, thereby solving the problems in the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a new type of conveying device for turning and opening the door of a tunnel boring machine, including a mounting frame connected to the rear end of the tunnel boring machine, a rotary oil cylinder is arranged between the mounting frame and the tunnel boring machine, a cantilever belt conveyor is hingedly connected to the rear side of the mounting frame, a lifting oil cylinder is arranged between the cantilever belt conveyor and the mounting frame, two operating carriers are correspondingly arranged on the lower side of the rear end of the cantilever belt conveyor, self-moving sliding shoes and a propulsion oil cylinder are installed at the bottom of the two operating carriers, the front ends of the two operating carriers are always located at the lower side of the tail of the cantilever belt conveyor, a connecting cylinder is installed at the tail of the cantilever belt conveyor, a detachable shield is arranged on the two operating carriers, the connecting cylinder is located at the shield and can rotate relative to the shield, wherein the connecting cylinder The bottom of the connecting tube is provided with a convex edge, a supporting ring matched with the convex edge is provided in the shield, an annular cover is provided on the top of the shield, the convex edge is located between the supporting ring and the annular cover, a plurality of elastic positioning cylinder mechanisms arranged circumferentially are provided on the outer circumference of the supporting ring, and an avoidance groove matched with the elastic positioning cylinder mechanism is provided on the annular cover, and the elastic positioning cylinder mechanism includes a positioning oil cylinder, a horizontally arranged pressing plate is installed on the piston rod of the positioning oil cylinder, a through hole is provided at one end of the pressing plate located on the convex edge, a positioning column is matched and installed in the through hole, a rubber pad is provided at the bottom end of the positioning column, a limiting block is provided at the upper end of the positioning column, a first spring is sleeved on the outer circumference of the positioning column between the rubber pad and the pressing plate, and the first spring always has the tendency to squeeze the rubber pad onto the convex edge. A locking block is provided at the bottom of the pressing plate, a locking ring groove matched with the locking block is provided on the outer circumference of the convex edge, and friction lines are provided at the bottom of the locking ring groove, and when the piston rod of the positioning oil cylinder contracts and drives the locking block to drop into the locking ring groove, the first spring is completely compressed. Elastic touch alarm mechanisms are installed on both sides of the cantilever belt conveyor in the length direction, and each elastic touch alarm mechanism includes a touch plate. Several connecting bolts are installed in the length direction of the touch plate. A nut matching the connecting bolt is provided on the cantilever belt conveyor. A through hole matching the stud of the connecting bolt and a countersunk hole matching the screw head of the connecting bolt are opened on the touch plate. A second spring is sleeved on the outer periphery of the connecting bolt between the touch plate and the nut. The second spring always has a tendency to keep the touch plate away from the cantilever belt conveyor. Corresponding to the position of the touch plate, a proximity card and an audible and visual alarm are also installed on the side of the cantilever belt conveyor. The proximity card is connected to the audible and visual alarm through a control line.A connecting plate is installed at the lower part of the cover, and a connecting sleeve that can be disassembled and assembled with the connecting plate is provided on the upper side of the frame of the second operating carrier. A locking column that can be vertically lifted and lowered is provided in the connecting sleeve, and a locking hole that matches the locking column is provided on the connecting plate. A horizontally arranged square rod is installed in the connecting sleeve, and a vertical square groove that matches the square rod is provided on the locking column. A third spring is installed between the bottom of the square rod and the vertical square groove, and the third spring always has a tendency to push the locking column downward. A bull's eye bearing is installed at the bottom of the locking column, and an inclined surface is provided at the front end of the connecting plate. A pull ring is installed on the top of the locking column extending out of the connecting sleeve. When the connecting plate enters the connecting sleeve, the inclined surface contacts the bull's eye bearing at the bottom of the locking column and can overcome the elastic force of the third spring to allow the locking column to move upward. After the locking hole on the connecting plate moves to the position of the locking column, the third spring can push the locking column into the locking hole again.

[0005] The positive effect of the utility model is that: the utility model describes a new type of conveying device for turning and opening the door of a tunnel boring machine. A rotatable cantilever belt conveyor is installed between the tunnel boring machine and the second operating carrier. When the tunnel boring machine turns, the tunnel boring machine removes the second operating carrier, and a cantilever belt conveyor is installed at the tail of the tunnel boring machine. At the same time, the second operating carrier is equipped with a sliding shoe self-moving device. The coal gangue passes through the cantilever belt conveyor to the second operating carrier equipped with the sliding shoe self-moving device, and then is transported to the main belt conveyor. In view of the current conveying process of turning and opening the door of a tunnel boring machine, this process device is simpler and more effective, and can reduce the potential safety hazards of the working surface and improve the safety of the operators. An elastic positioning cylinder mechanism is also arranged on the outer periphery of the rotating structure between the cantilever belt conveyor and the second operating carrier, which can realize the elastic compression and clamping of the cantilever belt conveyor, and prevent the cantilever belt conveyor from turning inward when the tunnel boring machine starts to turn. After turning and walking a certain distance, the cantilever belt conveyor is allowed to turn together. Due to the setting of elastic clamping, if a collision with the tunnel wall occurs, the cantilever belt conveyor will also be allowed to follow the turn, avoiding mechanical damage caused by rigid locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a structural schematic diagram of the utility model;

[0007] Figure 2 It is a schematic diagram of the connection between the connecting tube and the mask;

[0008] Figure 3 yes Figure 2 A half-section view of the structure;

[0009] Figure 4 yes Figure 3 A partial enlarged view of middle I;

[0010] Figure 5 This is a schematic diagram of the state where the locking block is lowered into the locking ring groove;

[0011] Figure 6It is a structural schematic diagram of an elastic touch alarm mechanism provided on a cantilever belt conveyor;

[0012] Figure 7 yes Figure 6 A partial enlarged view of middle II;

[0013] Figure 8 It is a structural schematic diagram of the connection plate being positioned in the connection sleeve;

[0014] Fig. 9 yes Figure 8 A half-section view of the structure;

[0015] Fig.10 It is a schematic diagram of the state in which the inclined surface contacts the bull's eye bearing when the connecting plate enters into the connecting sleeve;

[0016] Fig.11 This is a simulation diagram of the first step of the turning operation of the tunnel boring machine;

[0017] Fig.12 This is a simulation diagram of the second step of the turning operation of the tunnel boring machine;

[0018] Fig.13 This is a simulation diagram of the third step of the turning operation of the tunnel boring machine;

[0019] Fig.14 This is a simulation diagram of the fourth step of the tunnel boring machine's turning operation. DETAILED DESCRIPTION

[0020] The utility model discloses a novel conveying device for turning and opening the door of a tunnel boring machine, such as Figure 1 As shown, it includes a mounting frame 1 connected to the rear end of the tunnel boring machine, a rotary oil cylinder 2 is provided between the mounting frame 1 and the tunnel boring machine, a cantilever belt conveyor 6 is hingedly connected to the rear side of the mounting frame 1, and a lifting oil cylinder 3 is installed between the cantilever belt conveyor 6 and the mounting frame 1. The setting of the rotary oil cylinder 2 allows the cantilever belt conveyor 6 to swing and adjust relative to the tunnel boring machine, and the setting of the lifting oil cylinder 3 allows the cantilever belt conveyor 6 to lift and adjust the vertical height relative to the tunnel boring machine, and the two oil cylinders are used to achieve the up and down and left and right angle adjustment of the cantilever belt conveyor 6.

[0021] The second operating carrier 7 is correspondingly arranged at the lower side of the rear end of the cantilever belt conveyor 6, and the bottom of the second operating carrier 7 is installed with a self-moving sliding shoe 8 and a propulsion cylinder 5, and the front end of the second operating carrier 7 is always located at the lower side of the tail of the cantilever belt conveyor 6. The automatic movement of the second operating carrier 7 can be achieved by the telescopic action of the propulsion cylinder 5. The self-moving sliding shoe 8 can be the self-moving sliding shoe described in the Chinese public patent with the announcement number "CN210686051U", a self-moving sliding shoe device capable of intelligent monitoring.

[0022] When the roadheader equipped with a cantilever belt conveyor 6 turns, the angle of the cantilever belt conveyor 6 is adjusted through the rotary cylinder 2 and the lifting cylinder 3, so that the drop point is stabilized at the receiving port of the second operating carrier 7. As the roadheader moves, the second operating carrier 7 follows up through the self-moving sliding shoe 8 and the propulsion cylinder 5. During the operation, the coal gangue is transported to the cantilever belt conveyor 6, the second operating carrier 7, and finally to the main belt conveyor through the roadheader 1, completing the transportation of coal gangue during the turning process of the roadheader.

[0023] like Figure 2-4 As shown, a connecting cylinder 9 is installed at the tail of the cantilever belt conveyor 6, and a detachable shield 10 is provided on the second operating carrier 7. The connecting cylinder 9 is located on the shield 10 and can rotate relative to the shield 10. A flange 11 is provided at the bottom of the connecting cylinder 9, and a supporting ring 12 matching the flange 11 is provided in the shield 10. An annular cover 13 is provided at the top of the shield 10, and the flange 11 is located between the supporting ring 12 and the annular cover 13. The above structure allows the connecting cylinder 9 to rotate relative to the shield 10 without hindering the normal falling of the transported materials.

[0024] When the tunnel boring machine is turning, it is necessary to let the tunnel boring machine drive the front end of the cantilever belt conveyor 6 to turn, and at the same time let the rear end of the cantilever belt conveyor 6 be locked relative to the second operating carrier 7, so that the second operating carrier 7 can follow and move forward for a distance. After the tunnel boring machine completes the turning, the rotation lock between the rear end of the cantilever belt conveyor 6 and the second operating carrier 7 is released, so that the cantilever belt conveyor 6 can complete the turning process under the drive of the tunnel boring machine. In this way, it can ensure that the cantilever belt conveyor 6 is away from the inner corner position of the tunnel during the above-mentioned turning process to avoid collision.

[0025] In order to achieve the above action requirements, it is necessary to first lock the connecting tube 9 and the mask 10 relative to each other, and then release the rotation lock later, so that the cantilever belt conveyor 6 can follow the tunneling machine to complete the turning rotation. If a rigid positioning device is used, once the cantilever belt conveyor 6 collides with the tunnel wall, the connecting tube 9 and the mask 10 of the cantilever belt conveyor 6 cannot rotate relative to each other, which will inevitably cause damage to the cantilever belt conveyor 6 itself or damage to the rotation connection mechanism between the cantilever belt conveyor 6 and the second operating carrier 7.

[0026] In order to avoid the above situation, a plurality of elastic positioning cylinder mechanisms arranged in a circumference are provided on the outer circumference of the support ring 12, and an avoidance groove 14 cooperating with the elastic positioning cylinder mechanism is provided on the annular cover 13. The elastic positioning cylinder mechanism includes a positioning oil cylinder 15, and a horizontally arranged pressing plate 16 is installed on the piston rod of the positioning oil cylinder 15. A through hole is provided at one end of the pressing plate 16 located on the convex edge 11, and a positioning column 17 is installed in the through hole. A rubber pad 18 is provided at the bottom end of the positioning column 17, and a limit block 19 is provided at the upper end of the positioning column 17. A first spring 20 is sleeved on the outer circumference of the positioning column 17 between the rubber pad 18 and the pressing plate 16, and the first spring 20 always has a tendency to squeeze the rubber pad 18 onto the convex edge 11.

[0027] By adopting the elastic positioning cylinder mechanism, when it is necessary to relatively lock the connecting tube 9 and the mask 10, the piston rod of the positioning cylinder 15 contracts to allow the rubber pad 18 to contact the convex edge 11. Under the elastic force of the first spring 20, the positioning column 17 can achieve elastic compression of the convex edge 11 to achieve relative locking of the connecting tube 9 and the mask 10. Since it is elastic compression here, the contraction amplitude of the piston rod can adjust the pre-compression force of the positioning column 17 on the convex edge 11. Once the cantilever belt conveyor 6 collides, the tunneling machine can drive the cantilever belt conveyor 6 to overcome the elastic force of the first spring 20 and rotate relative to the second operating carrier 7, thereby avoiding damage to the connection structure between the arm belt conveyor 6 and the second operating carrier 7. When it is necessary to release the lock of the convex edge 11 later, it is only necessary to move the piston rod of the positioning cylinder 15 upward to allow the rubber pad 18 to move away from the convex edge 11.

[0028] In some operation environments where the lanes are wide, it is not necessary to consider the moving range of the cantilever belt conveyor 6. Under the premise of ensuring that the cantilever belt conveyor 6 does not collide, it is necessary to realize the rigid locking limit between the connecting tube 9 and the mask 10. To achieve the above purpose, Figure 5 As shown, under the premise of having an elastic positioning cylinder mechanism, a locking block 21 is provided at the bottom of the pressing plate 16, a locking ring groove 22 matching the locking block 21 is opened on the outer periphery of the convex edge 11, and a friction pattern 23 is provided at the bottom of the locking ring groove 22. When the piston rod of the positioning cylinder 15 contracts and drives the locking block 21 to drop into the locking ring groove 22, the first spring 20 is completely compressed.

[0029] The friction pattern 23 can effectively increase the extrusion friction between the locking block 21 and the convex edge 11. The compression limit of the convex edge 11 is achieved by the power of the positioning cylinder 15. The first spring 20 is completely compressed and loses its elastic function, and is now converted into a rigid rotation lock.

[0030] Furthermore, in order to avoid the contact and collision between the cantilever belt conveyor 6 and the side wall of the tunnel, a warning can be issued before the collision occurs. Both sides of the cantilever belt conveyor 6 in the length direction are equipped with elastic touch alarm mechanisms, such as Figure 6 and Figure 7 As shown, each elastic touch alarm mechanism includes a touch plate 24 , and a plurality of connecting bolts 25 are installed in the length direction of the touch plate 24 . Nuts 26 matching with the connecting bolts 25 are provided on the cantilever belt conveyor 6 .

[0031] The touch plate 24 is provided with a through hole matched with the stud of the connection bolt 25 and a countersunk hole 27 matched with the screw head of the connection bolt 25. The outer periphery of the connection bolt 25 between the touch plate 24 and the nut 26 is sleeved with a second spring 28, and the second spring 28 always has a tendency to keep the touch plate 24 away from the cantilever belt conveyor 6. Corresponding to the position of the touch plate 24, a proximity card 29 and an audible and visual alarm 30 are also installed on the side of the cantilever belt conveyor 6. The proximity card 29 is connected to the audible and visual alarm 30 through a control line.

[0032] The touch plate 24 is located on both sides of the cantilever belt conveyor 6, so that the cantilever belt conveyor 6 will collide with the tunnel wall in advance. The proximity switch 29 will always monitor the distance between the touch plate 24 and the cantilever belt conveyor 6. Once the touch plate 24 touches the side wall of the tunnel, and the distance data detected by the proximity switch 29 is less than the set value, the sound and light alarm 30 will sound an alarm to remind the staff to adjust the position of the equipment, thereby avoiding the collision of the cantilever belt conveyor 6, ensuring the normal operation, and improving the service life of the equipment.

[0033] Furthermore, in order to realize the detachable connection between the mask 10 and the second operating carrier 7, as shown in FIG. Figure 8 and Fig. 9 As shown, a connecting plate 31 is installed at the lower part of the cover 10, and a connecting sleeve 32 that can be disassembled and assembled with the connecting plate 31 is provided on the upper side of the frame of the second operating carrier 7.

[0034] A locking column 33 capable of vertical lifting is provided in the connecting sleeve 32, and a locking hole 34 matching with the locking column 33 is provided on the connecting plate 31. When the locking column 33 is located in the locking hole 34, the connecting plate 31 and the connecting sleeve 32 are relatively locked. A horizontally arranged square rod 35 is installed in the connecting sleeve 32, and a vertical square groove 36 matching with the square rod 35 is provided on the locking column 33. A third spring 37 is installed between the square rod 35 and the bottom of the vertical square groove 36, and the third spring 37 always has a tendency to push the locking column 33 downward. The arrangement of the vertical square groove 36 and the square rod 35 can ensure that the locking column 33 can be lifted and lowered vertically without swinging.

[0035] The bottom of the locking column 33 is installed with a bull's eye bearing 38, the front end of the connecting plate 31 is provided with an inclined surface 39, and the top of the locking column 33 extending out of the connecting sleeve 32 is installed with a pull ring 4. Fig.10As shown, after the inclined surface 39 contacts the bull's eye bearing 38 at the bottom of the locking column 33, it can overcome the elastic force of the third spring 37 to allow the locking column 33 to move upward. After the locking hole 34 on the connecting plate 31 moves to the position of the locking column 33, the third spring 37 can push the locking column 33 into the locking hole 34 again.

[0036] When it is necessary to release the lock between the connecting plate 31 and the connecting sleeve 32, it is only necessary to overcome the elastic force of the third spring 37 and pull the pull ring 4 upward to separate the locking column 33 from the locking hole 34, so that the connecting plate 31 can be pulled out from the connecting sleeve 32, thereby realizing the separation of the cover 10 and the second operating carrier 7.

[0037] The technical solution of the present invention is not limited to the scope of the embodiments described in the present invention. The technical contents not described in detail in the present invention are all known technologies.

Claims

1. A new type of conveying device for turning and opening the door of a tunnel boring machine, characterized in that: The invention comprises a mounting frame (1) connected to the rear end of a tunnel boring machine, a rotary oil cylinder (2) being arranged between the mounting frame (1) and the tunnel boring machine, a cantilever belt conveyor (6) being hingedly connected to the rear side of the mounting frame (1), a lifting oil cylinder (3) being arranged between the cantilever belt conveyor (6) and the mounting frame (1), two operating carriers (7) being arranged correspondingly on the lower side of the rear end of the cantilever belt conveyor (6), and a self-moving sliding shoe (8) and a propulsion oil cylinder (5) being arranged at the bottom of the two operating carriers (7). The front end of the second operating carrier (7) is always located at the lower side of the tail of the cantilever belt conveyor (6), and a connecting cylinder (9) is installed at the tail of the cantilever belt conveyor (6). A detachable shield (10) is provided on the second operating carrier (7), and the connecting cylinder (9) is located on the shield (10) and can rotate relative to the shield (10), wherein a convex edge (11) is provided at the bottom of the connecting cylinder (9), and a supporting ring (12) matching the convex edge (11) is provided in the shield (10). A ring cover (13) is provided on the top of the shield (10), the convex edge (11) is located between the supporting ring (12) and the ring cover (13), a plurality of elastic positioning cylinder mechanisms arranged circumferentially are provided on the outer circumference of the supporting ring (12), and an avoidance groove (14) matched with the elastic positioning cylinder mechanism is provided on the ring cover (13), the elastic positioning cylinder mechanism includes a positioning oil cylinder (15), a piston rod of the positioning oil cylinder (15) is provided with a horizontally arranged pressing plate (16), one end of the pressing plate (16) located on the convex edge (11) is provided with a through hole, a positioning column (17) is matched and installed in the through hole, a rubber pad (18) is provided at the bottom end of the positioning column (17), a limit block (19) is provided at the upper end of the positioning column (17), and a first spring (20) is sleeved on the outer circumference of the positioning column (17) between the rubber pad (18) and the pressing plate (16), and the first spring (20) always has a tendency to squeeze the rubber pad (18) onto the convex edge (11).

2. According to claim 1, a new type of conveying device for turning and opening the door of a tunnel boring machine is characterized in that: A locking block (21) is provided at the bottom of the pressing plate (16), a locking ring groove (22) matching the locking block (21) is provided on the outer periphery of the convex edge (11), and a friction pattern (23) is provided at the bottom of the locking ring groove (22). When the piston rod of the positioning oil cylinder (15) contracts and drives the locking block (21) to descend into the locking ring groove (22), the first spring (20) is completely compressed.

3. According to claim 1, a new type of conveying device for turning and opening the door of a tunnel boring machine is characterized in that: The cantilever belt conveyor (6) is provided with elastic touch alarm mechanisms at both sides in the length direction, each elastic touch alarm mechanism comprises a touch plate (24), a plurality of connecting bolts (25) are installed in the length direction of the touch plate (24), a nut (26) matching with the connecting bolt (25) is provided on the cantilever belt conveyor (6), and a through hole matching with the stud of the connecting bolt (25) and a nut head matching with the connecting bolt (25) are provided on the touch plate (24). A second spring (28) is sleeved on the outer periphery of the connecting bolt (25) between the touch plate (24) and the nut (26), and the second spring (28) always has a tendency to keep the touch plate (24) away from the cantilever belt conveyor (6). Corresponding to the position of the touch plate (24), a proximity card (29) and an audible and visual alarm (30) are also installed on the side of the cantilever belt conveyor (6), and the proximity card (29) is connected to the audible and visual alarm (30) through a control line.

4. According to claim 1, a new type of conveying device for turning and opening the door of a tunnel boring machine is characterized in that: A connecting plate (31) is installed at the lower part of the shield (10), a connecting sleeve (32) which can be disassembled and assembled with the connecting plate (31) is installed on the upper side of the frame of the second operating carrier (7), a locking column (33) which can be vertically lifted and lowered is provided in the connecting sleeve (32), a locking hole (34) which is matched with the locking column (33) is provided on the connecting plate (31), a horizontally arranged square rod (35) is installed in the connecting sleeve (32), a vertical square groove (36) which is matched with the square rod (35) is provided on the locking column (33), a third spring (37) is installed between the bottom of the square rod (35) and the vertical square groove (36), and the third spring (37) always has the function of pushing the locking column The locking column (33) has a tendency to move downward, a bull's eye bearing (38) is installed at the bottom of the locking column (33), a bevel (39) is provided at the front end of the connecting plate (31), and a pull ring (4) is installed at the top of the locking column (33) extending out of the connecting sleeve (32). When the connecting plate (31) enters the connecting sleeve (32), the bevel (39) contacts the bull's eye bearing (38) at the bottom of the locking column (33) and can overcome the elastic force of the third spring (37) to allow the locking column (33) to move upward. After the locking hole (34) on the connecting plate (31) moves to the position of the locking column (33), the third spring (37) can push the locking column (33) into the locking hole (34) again.

Images