A ventilation system for shield tunnel

Abstract

The present invention discloses a ventilation system for a shield tunnel, comprising an air supply structure, the air supply structure comprising a bracket, the top of the bracket being fixedly connected with a mounting frame, an air inlet pipe for supplying air to the tunnel being installed inside the mounting frame, one end of the air inlet pipe being connected with a transfer pipe through a flange, the outer surface of the transfer pipe being installed with a material-retrieving structure for picking up the pipe; the material-retrieving structure comprising a swivel rotatably connected to the outer surface of the transfer pipe, a mechanical arm being installed on the outer wall of the swivel, one end of the mechanical arm being connected with a hydraulic rod, the end of the hydraulic rod being connected with a collar, the inner cavity of the collar being movably connected with a connecting pipe structure for conveying air, and one end of the connecting pipe structure being far from the connecting pipe structure being connected with an air outlet pipe. When the present invention is in use, the installation of the pipe can be automatically realized through the coordinated use of the material-retrieving structure, the transmission structure and the tightening structure, thereby improving the efficiency of the pipe installation and being able to restore the ventilation of the shield tunnel in a timely manner.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel ventilation, in particular to a ventilation system for a shield tunnel. Background Art

[0002] Shield tunneling is a fully mechanized construction method that uses shield machinery to advance underground, using the shield shell and segments to support the surrounding rock to prevent collapse in the tunnel. The shield machine uses a cutting device to excavate the soil in front of the excavation face, and the soil is transported out of the cave by the excavation machinery. The jack is used to pressurize the rear part and assemble the precast concrete segments to form the tunnel structure;

[0003] During the construction of a shield tunnel, a ventilation system is needed to ensure construction safety, environmental control, oxygen supply, noise control, and emergency preparedness. During the continuous excavation of the shield machine, the distance between the shield machine and the air outlet end of the ventilation duct is constantly increasing. At this time, the duct needs to be extended to avoid ventilation interruption. The traditional way to extend the duct is generally to manually take over the operation, such as a hybrid system of cooling and ventilation of a shield machine with a prior art announcement number of CN110608043A. However, the manual takeover method has the disadvantage of a long working time, and the oxygen supply in the tunnel is not timely, which affects the health of the workers in the tunnel. Therefore, we propose a ventilation system for shield tunnels to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a ventilation system for a shield tunnel to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A ventilation system for a shield tunnel, comprising an air supply structure, the air supply structure comprising a bracket, a mounting frame fixedly connected to the top of the bracket, an air inlet pipe for supplying air into the tunnel installed inside the mounting frame, one end of the air inlet pipe is connected to a transfer pipe via a flange, and a material taking structure for picking up the pipe is installed on the outer surface of the transfer pipe;

[0007] The material taking structure comprises a swivel rotatably connected to the outer surface of the transfer tube, a mechanical arm is installed on the outer wall of the swivel, one end of the mechanical arm is connected to a hydraulic rod, the end of the hydraulic rod is connected to a collar, the inner cavity of the collar is movably connected to a connecting pipe structure for conveying air, and the end of the connecting pipe structure away from the material taking structure is connected to an air outlet pipe;

[0008] The outer wall of the collar is fixedly connected to a plurality of mounting plates distributed in a ring shape, the side wall of the mounting plate is connected to a first push rod, the end of the first push rod is connected to a clamping plate for clamping the connecting pipe structure, the side wall of the clamping plate is connected to a transmission structure, and one end of the transmission structure is connected to a tightening structure.

[0009] As a further solution of the present invention, the connecting tube structure includes an outer tube body, the inner cavity of the outer tube body is slidably connected to the inner tube body, and the inner tube body can be automatically reset in the outer tube body, and one end of the inner tube body is connected to a connecting sleeve.

[0010] As a further solution of the present invention, a first connecting ring is sleeved on the outer surface of the connecting sleeve, a plurality of fastening nuts are fixedly connected to one end of the first connecting ring, and the fastening nuts pass through the inner cavity of the first connecting ring, and a second connecting ring is connected to the end of the outer tube body away from the first connecting ring, a plurality of fastening bolts are threadedly connected to the side wall of the second connecting ring, and the fastening bolts pass through the inner cavity of the second connecting ring.

[0011] As a further solution of the present invention, the transmission structure includes a second push rod fixedly connected to the side wall of the splint, the output end of the second push rod is connected to a push block, a rectangular window is provided on the side of the push block that is in contact with the connecting pipe structure, and the inner wall of the rectangular window is rotatably connected to a transmission wheel.

[0012] As a further solution of the present invention, a cylindrical window is provided at one end of the push block away from the collar, the rectangular window is communicated with the cylindrical window, and the tightening structure is connected to the inner cavity of the cylindrical window.

[0013] As a further solution of the present invention, the tightening structure includes a first sleeve rotatably connected to the inner wall of the cylindrical window, and the outer wall of the transmission wheel is fitted with the outer wall of the first sleeve, the inner wall of the first sleeve is connected with a one-way bearing, the inner wall of the one-way bearing is connected with a second sleeve, and the inner wall of the second sleeve is provided with a plurality of storage grooves equidistantly distributed in an annular shape, the inner cavity of the storage groove is slidably connected with a locking block, and the end of the locking block fitted with the fastening bolt is semicircular.

[0014] As a further solution of the present invention, one side of the air supply structure is connected to a feeding structure for pipeline supply, and the feeding structure includes a protective frame, the inner cavity of the protective frame is equipped with a slide rail for guiding the pipeline, and the connecting pipe structure is slidably connected to the top of the slide rail.

[0015] As a further solution of the present invention, the outer wall of the outer tube body is connected with a clamping structure, and one end of the clamping structure away from the outer tube body is slidably connected with a connecting structure;

[0016] The connection structure comprises a hanging rail, a top end of which is connected to a connecting plate, and an inner wall of the hanging rail is provided with a clamping groove.

[0017] As a further solution of the present invention, the end of the transfer tube away from the air inlet pipe is connected to a connecting frame via a flange, the inner cavity of the connecting frame is connected to an electromagnet, one end of the connecting sleeve is fixedly connected to a magnetic ring, and the magnetic ring is magnetically connected to the electromagnet.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. When the present invention is in use, the coordinated use of the material taking structure, the transmission structure and the tightening structure can automatically realize the installation of the pipeline, thereby improving the efficiency of pipeline installation and being able to restore the ventilation of the shield tunnel in a timely manner.

[0020] 2. When the present invention is in use, when the fastening bolt comes into contact with the locking block, the locking block will be pushed so that the locking block is pushed back into the receiving groove. Since the tightening structure is always in a rotating state, the locking block pushed back into the receiving groove will slide on the surface of the fastening bolt until the edge of the fastening bolt is clamped between the two locking blocks. At this time, the locking block is pushed out under the action of the first compression spring and completes the clamping of the fastening bolt. At this time, the locking block can drive the fastening bolt to rotate, thereby automatically completing the connection between the fastening bolt and the fastening nut.

[0021] 3. When the present invention is in use, the hydraulic rod pulls the first connecting ring through the clamping plate, so that the first connecting ring moves in the direction of the air supply structure, thereby automatically completing the connection between the magnetic ring and the electromagnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of a ventilation system for a shield tunnel.

[0023] Figure 2 A front view of a ventilation system for a shield tunnel.

[0024] Figure 3 A ventilation system for shield tunnels Figure 1 A magnified schematic diagram of the structure in the middle.

[0025] Figure 4 A ventilation system for shield tunnels Figure 1 A magnified schematic diagram of the structure at B in the figure.

[0026] Figure 5 A structural diagram of a plywood used in a ventilation system for a shield tunnel.

[0027] Figure 6 A cross-sectional view of a tightening structure used in a ventilation system for a shield tunnel.

[0028] Figure 7 This is a disassembled diagram of a connecting pipe structure used in a ventilation system for a shield tunnel.

[0029] Figure 8 A structural diagram of a collar used in a ventilation system for a shield tunnel.

[0030] Fig. 9 A cross-sectional view of a snap-in structure used in a ventilation system for a shield tunnel.

[0031] In the figure:

[0032] 1. Air supply structure; 2. Feeding structure; 3. Connection structure; 4. Retrieving structure; 5. Transmission structure; 6. Tightening structure; 7. Connecting pipe structure; 8. Connecting frame; 9. Electromagnet; 10. Clamping structure;

[0033] 11. Bracket; 12. Mounting frame; 13. Air inlet pipe; 14. Transfer pipe; 15. Frameless motor; 16. Air outlet pipe;

[0034] 21. Protective frame; 22. Slide rail; 23. Ball bearing; 24. Adjustment slot; 31. Hanging rail; 32. Connecting plate; 33. Card slot;

[0035] 41. swivel; 42. mechanical arm; 43. hydraulic rod; 44. collar; 45. mounting plate; 46. first push rod; 47. clamping plate; 48. anti-slip pad;

[0036] 51. second push rod; 52. push block; 53. visual sensor module; 54. rectangular window; 55. transmission wheel; 56. cylindrical window; 61. first sleeve; 62. one-way bearing; 63. second sleeve; 64. storage slot; 65. locking block; 66. first compression spring;

[0037] 71, outer tube body; 72, arc groove; 73, limit block; 74, inner tube body; 75, fixing rod; 76, pull ring; 77, reset spring; 78, connecting sleeve; 701, first connecting ring; 702, fastening nut; 703, second connecting ring; 704, fastening bolt; 705, magnetic ring;

[0038] 100, connecting block; 101, supporting rod; 102, sliding block; 103, first telescopic slot; 104, second compression spring; 105, ejector rod; 106, first plug-in structure; 107, second plug-in structure; 108, second telescopic slot; 109, positioning hole; 110, blocking ball; 111, plug-in rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1: Please refer to Figure 1-9 The present invention provides a technical solution for a ventilation system for a shield tunnel: comprising an air supply structure 1, the air supply structure 1 comprising a bracket 11, a mounting frame 12 is fixedly connected to the top of the bracket 11, an air inlet pipe 13 for supplying air to the tunnel is installed inside the mounting frame 12, one end of the air inlet pipe 13 is connected to a transfer pipe 14 through a flange, and a material taking structure 4 for picking up the pipe is installed on the outer surface of the transfer pipe 14;

[0041] The material taking structure 4 includes a swivel 41 rotatably connected to the outer surface of the transfer tube 14, a frameless motor 15 is installed on the outer surface of the transfer tube 14 at a position on one side of the swivel 41, and the outer ring of the frameless motor 15 is fixedly connected to the swivel 41 to facilitate adjusting the angle of the swivel 41, a mechanical arm 42 is installed on the outer wall of the swivel 41, one end of the mechanical arm 42 is connected to a hydraulic rod 43, the end of the hydraulic rod 43 is connected to a collar 44, the inner cavity of the collar 44 is movably connected to a connecting pipe structure 7 for conveying air, and the end of the connecting pipe structure 7 away from the material taking structure 4 is connected to the air outlet pipe 16;

[0042] The outer wall of the ring 44 is fixedly connected to a plurality of mounting plates 45 distributed in a ring shape, the side wall of the mounting plate 45 is connected to a first push rod 46, the end of the first push rod 46 is connected to a clamping plate 47 for clamping the connecting pipe structure 7, the side of the clamping plate 47 that is in contact with the connecting pipe structure 7 is connected to an anti-skid pad 48 with an anti-skid function, the side wall of the clamping plate 47 is connected to a transmission structure 5, and one end of the transmission structure 5 is connected to a tightening structure 6.

[0043] The connecting tube structure 7 comprises an outer tube body 71, the inner cavity of the outer tube body 71 is slidably connected to an inner tube body 74, and the inner tube body 74 can automatically reset in the outer tube body 71, and one end of the inner tube body 74 is connected to a connecting sleeve 78;

[0044] The inner wall of the outer tube body 71 and the outer wall of the inner tube body 74 are both provided with an arc groove 72, the end of the arc groove 72 provided by the outer tube body 71 is fixedly connected to a limit block 73, the side wall of the limit block 73 is fixedly connected to a fixing rod 75, the outer surface of the fixing rod 75 is sleeved with a return spring 77, the outer surface of the fixing rod 75 is sleeved with a pull ring 76 at a position on one side of the return spring 77, and the pull ring 76 is fixedly connected to the outer wall of the inner tube body 74. Specifically, the return spring 77 applies pressure to the pull ring 76, so that the inner tube body 74 can be automatically retracted into the inner cavity of the outer tube body 71;

[0045] The outer surface of the connecting sleeve 78 is sleeved with a first connecting ring 701, one end of the first connecting ring 701 is fixedly connected with a plurality of fastening nuts 702, and the fastening nuts 702 pass through the inner cavity of the first connecting ring 701, and the end of the outer tube body 71 away from the first connecting ring 701 is connected with a second connecting ring 703, the side wall of the second connecting ring 703 is threadedly connected with a plurality of fastening bolts 704, and the fastening bolts 704 pass through the inner cavity of the second connecting ring 703.

[0046] Specifically, by Figure 1 , 2 It can be seen that there are multiple groups of connecting pipe structures 7, and two groups of connecting pipe structures 7 are fixedly connected by fastening nuts 702 and fastening bolts 704. When in use, one end of one group of connecting pipe structures 7 with the second connecting ring 703 is aligned with one end of the other group of connecting pipe structures 7 with the first connecting ring 701, and then the fastening bolts 704 are rotated by tightening the structure 6, so that the fastening bolts 704 of the second connecting ring 703 and the fastening nuts 702 of the first connecting ring 701 are threadedly connected to complete the docking between the two groups of connecting pipe structures 7.

[0047] The transmission structure 5 includes a second push rod 51 fixedly connected to the side wall of the clamping plate 47, the output end of the second push rod 51 is connected to a push block 52, and a rectangular window 54 is provided on a side of the push block 52 that is in contact with the connecting pipe structure 7, and a transmission wheel 55 is rotatably connected to the inner wall of the rectangular window 54;

[0048] A cylindrical window 56 is provided at one end of the push block 52 away from the collar 44, the rectangular window 54 is communicated with the cylindrical window 56, and the tightening structure 6 is connected to the inner cavity of the cylindrical window 56. A visual sensor module 53 for detecting the pipeline connection position is installed at one end of the push block 52 located on one side of the cylindrical window 56.

[0049] The tightening structure 6 includes a first sleeve 61 rotatably connected to the inner wall of the cylindrical window 56, and the outer wall of the transmission wheel 55 is fitted with the outer wall of the first sleeve 61, the inner wall of the first sleeve 61 is fixedly connected with a one-way bearing 62, and the inner wall of the first sleeve 61 is fixedly connected with the outer wall of the one-way bearing 62, the inner wall of the one-way bearing 62 is fixedly connected with a second sleeve 63, and the inner wall of the second sleeve 63 is provided with a plurality of receiving grooves 64 distributed in an annular shape and at equal intervals, the inner cavity of the receiving groove 64 is slidably connected with a locking block 65, the inner cavity of the receiving groove 64 is located at the end of the locking block 65 and is also connected with a first compression spring 66 for applying pressure to the locking block 65, and the end of the locking block 65 that is fitted with the fastening bolt 704 is semicircular.

[0050] Specifically, by Figure 5 As shown, the rectangular window 54 is obliquely opened on the push block 52, and the angle between the transmission wheel 55 and the edge of the push block 52 is forty-five degrees. When the transmission wheel 55 is in contact with the outer wall of the outer tube body 71 and the push block 52 moves under the action of the second push rod 51, the transmission wheel 55 rotates under the action of friction. At this time, the tightening structure 6 in contact with the surface of the transmission wheel 55 rotates driven by the transmission wheel 55, and then the fastening bolt 704 is driven to rotate through the tightening structure 6, thereby automatically completing the connection between the fastening bolt 704 and the fastening nut 702.

[0051] One side of the air supply structure 1 is connected to a feeding structure 2 for pipeline supply, and the feeding structure 2 includes a protective frame 21. An adjustment groove 24 is opened on one side of the protective frame 21, and the adjustment groove 24 is located below the swivel 41. The inner cavity of the protective frame 21 is installed with a slide rail 22 for guiding the pipeline. A plurality of balls 23 are rollingly connected to the top of the slide rail 22, and the connecting pipe structure 7 is slidably connected to the top of the slide rail 22.

[0052] Specifically, by Figure 1 As shown, the top of the slide rail 22 is gradually inclined downward and tends to be flat as it gradually approaches the adjustment groove 24. Therefore, the connecting tube structure 7 at the top of the slide rail 22 slides down along the slide rail 22 under the influence of its own gravity and the ball 23. Then, when the connecting tube structure 7 located under the swivel 41 is removed, the subsequent connecting tube structure 7 can realize automatic loading.

[0053] Example 2: Please refer to Figure 7 , 9 , based on the first embodiment, the outer wall of the outer tube body 71 is connected with a clamping structure 10, and one end of the clamping structure 10 away from the outer tube body 71 is slidably connected with a connecting structure 3;

[0054] The clamping structure 10 includes a connecting block 100 fixedly connected to the outer wall of the outer tube body 71, a rotating groove is provided on the side wall of the connecting block 100, a support rod 101 is rotatably connected to the inner cavity of the rotating groove through a rotating shaft, a slider 102 is fixedly connected to one end of the support rod 101 away from the connecting block 100, a second telescopic groove 108 is provided in the inner cavity of the support rod 101, a second plug-in structure 107 is connected to the inner cavity of the second telescopic groove 108, an insert rod 111 is connected to one end of the second plug-in structure 107, and a positioning hole 109 is provided through the side wall of the connecting block 100 above the rotating groove;

[0055] Specifically, the insertion rod 111 is movably connected to the inner cavity of the positioning hole 109 to facilitate the limiting and fixing of the support rod 101. More specifically, when the clamping structure 10 moves to the adjustment slot 24 provided by the protective frame 21, the support rod 101 loses the position restriction of the protective frame 21 and rotates around the connecting block 100 under the influence of the gravity of the slider 102 until the insertion rod 111 is level with the positioning hole 109. At this time, the insertion rod 111 is pushed into the positioning hole 109 under the action of the second plug-in structure 107, thereby locking the position of the support rod 101. When folding is required, the insertion rod 111 is pushed back into the second telescopic slot 108.

[0056] The connection structure 3 includes a hanging rail 31 , and the slider 102 slides in the inner cavity of the hanging rail 31 . The top of the hanging rail 31 is connected to a connecting plate 32 , and the inner wall of the hanging rail 31 is provided with a slot 33 .

[0057] The inner cavity of the slider 102 is provided with a first telescopic slot 103, the inner cavity of the first telescopic slot 103 is connected with a first plug-in structure 106, and one end of the first plug-in structure 106 is connected with a card ball 110;

[0058] Specifically, the card ball 110 is movably connected to the inner cavity of the card slot 33 to limit the slider 102. More specifically, under manual intervention, the hanging rail 31 is connected to the top of the tunnel through the connecting plate 32. When the material taking structure 4 drives the connecting pipe structure 7 to move, it will drive the slider 102 to be connected to the hanging rail 31.

[0059] The first plug-in structure 106 and the second plug-in structure 107 both include two push rods 105 and a second compression spring 104 located between the two push rods 105 . Specifically, the second compression spring 104 is used to apply a thrust to the push rod 105 .

[0060] One end of the transfer tube 14 away from the air inlet pipe 13 is connected to the connecting frame 8 through a flange, the inner cavity of the connecting frame 8 is connected to the electromagnet 9, one end of the connecting sleeve 78 is fixedly connected to the magnetic ring 705, and the magnetic ring 705 is magnetically connected to the electromagnet 9.

[0061] The working principle of the present invention is:

[0062] When installing the connecting pipe structure 7, first connect one end of a group of connecting pipe structures 7 to the air outlet pipe 16, and the other end is connected to the electromagnet 9 through the magnetic ring 705, and the air outlet pipe 16 is connected to the shield machine and moves with the shield machine. When the shield machine moves, it drives the air outlet pipe 16 forward. At this time, the air outlet pipe 16 drives the outer tube body 71 in the group of connecting pipe structures 7 to move. At this time, the return spring 77 is pushed in the direction of the pull ring 76 under the action of the limit block 73. At this time, the return spring 77 is compressed and the inner tube body 74 extends out. When the reverse thrust of the return spring 77 after being compressed is greater than the suction force of the electromagnet 9 on the magnetic ring 705, the group of connecting pipe structures 7 is disconnected from the air supply structure 1, and under the action of the return spring 77, the inner tube body 74 is retracted into the outer tube body 71. At this time, a distance will be separated between the group of connecting pipe structures 7 and the air supply structure 1 to facilitate the subsequent installation of the connecting pipe structure 7.

[0063] When the second group of connecting pipe structures 7 is installed, one end of the second group of connecting pipe structures 7 is connected to one end of the first group of connecting pipe structures 7, and the other end is connected to the electromagnet 9 through the magnetic ring 705. At this time, the first group of connecting pipe structures 7 moves forward driven by the air outlet pipe 16. At this time, the inner and outer tube bodies 71 of this group move forward until the card ball 110 in the card connection structure 10 connected to the outer wall of the outer tube body 71 is carded in the card groove 33. At this time, the pulling force is provided by the reset spring 77 to pull back the inner tube body 74, and pull the second group of connecting pipe structures 7 through the inner tube body 74. At this time, the second group The outer tube body 71 in the connecting tube structure 7 is pulled toward the shield under the action of the inner tube body 74 in the first group of connecting tube structures 7 until the card ball 110 in the card connection structure 10 connected to the outer wall of the second group of connecting tube structures 7 is carded in the card slot 33. At this time, the inner tube body 74 in the second group of connecting tube structures 7 is pulled back under the action of the reset spring 77 to disconnect the inner tube body 74 from the electromagnet 9. At this time, the subsequent connecting tube structure 7 can be installed. At this time, the wind enters the connecting tube structure 7 from the air supply structure 1 and is discharged through the air outlet pipe 16 to complete the ventilation work in the tunnel;

[0064] When taking over the pipe, the staff first places the connecting pipe structure 7 in the feeding structure 2. When the air supply structure 1 is disconnected from the air outlet pipe 16, the mechanical arm 42 drives the collar 44 to move until the collar 44 is perpendicular to the connecting pipe structure 7 in the feeding structure 2. At this time, the hydraulic rod 43 drives the collar 44 to move downward until the collar 44 is sleeved on the outer surface of the connecting pipe structure 7. At this time, the first push rod 46 drives the clamping plate 47 to move until one side of the clamping plate 47 fits with the surface of the connecting pipe structure 7. The connecting pipe structure 7 can be clamped. At this time, the hydraulic rod 43 drives the connecting pipe structure 7 to move upward, and adjusts the position of the collar 44 through the mechanical arm 42, so that the collar 44 is concentric with the air outlet pipe 16. At this time, the connecting pipe structure 7 is pushed by the hydraulic rod 43, so that the second connecting ring 703 on the connecting pipe structure 7 is close to the original first connecting ring 701. At this time, under the action of the visual sensor module 53, the positions of the fastening nut 702 and the fastening bolt 704 are detected, and then the frameless motor 15 drives the rotating ring 41 to rotate to adjust the angle of the connecting pipe structure 7 to be installed, so that the fastening bolt 704 can be aligned with the fastening nut 702;

[0065] After the fastening bolt 704 is aligned with the fastening nut 702, the second push rod 51 drives the push block 52 to move, and the push block 52 drives the transmission wheel 55 to move. When the transmission wheel 55 rolls on the surface of the outer tube 71, it drives the tightening structure 6 to rotate the fastening bolt 704, thereby fixing the fastening bolt 704 and the fastening nut 702.

[0066] Depend on Figure 7 As shown, the fastening bolt 704 is a hexagonal bolt, and before the tightening structure 6 contacts the fastening bolt 704, it has already rotated under the action of the transmission wheel 55, and Figure 6 As shown, the end of the locking block 65 horizontal to the fastening bolt 704 is arc-shaped. When the fastening bolt 704 comes into contact with the locking block 65, the locking block 65 will be pushed so that the locking block 65 is pushed back into the receiving groove 64. Since the tightening structure 6 is always in a rotating state, the locking block 65 pushed back into the receiving groove 64 will slide on the surface of the fastening bolt 704 until the edge of the fastening bolt 704 is clamped between the two locking blocks 65. At this time, the locking block 65 is pushed out under the action of the first compression spring 66 and completes the clamping of the fastening bolt 704. At this time, the locking block 65 can drive the fastening bolt 704 to rotate.

[0067] Since the first sleeve 61 and the second sleeve 63 are connected by the one-way bearing 62, when the push block 52 moves toward the second connecting ring 703, the transmission wheel 55 drives the one-way bearing 62 to rotate through the first sleeve 61, and the one-way bearing 62 and the second sleeve 63 are in a stuck state, thereby driving the second sleeve 63 to rotate. On the contrary, the second sleeve 63 and the one-way bearing 62 are in a rotationally connected state, so as to prevent the push block 52 from moving away from the second connecting ring 703 and affecting the fastening bolt 704.

[0068] When the fastening nut 702 is connected with the fastening bolt 704, the first push rod 46 drives the clamping plate 47 to move in the direction away from the outer tube body 71 until the clamping plate 47 is no longer connected to the outer tube body 71. At this time, the ring 44 is pulled back by the hydraulic rod 43 until the clamping plate 47 contacts the first connecting ring 701 in the connecting pipe structure 7. At this time, the hydraulic rod 43 can pull the first connecting ring 701 through the clamping plate 47 to move the first connecting ring 701 in the direction of the air supply structure 1 until the magnetic ring 705 of the first connecting ring 701 is connected to the electromagnet 9. When the magnetic ring 705 is in a connected state with the electromagnet 9, the ring 44 is at the periphery of the connecting pipe structure 7, waiting for the next takeover work. At this time, the clamping plate 47 is completely reset by the first push rod 46 to prevent the clamping plate 47 from affecting the subsequent retraction of the inner tube body 74.

[0069] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ventilation system for a shield tunnel, comprising an air supply structure (1), characterized in that: The air supply structure (1) comprises a bracket (11), the top end of the bracket (11) is fixedly connected to a mounting frame (12), an air inlet pipe (13) for supplying air into the tunnel is installed inside the mounting frame (12), one end of the air inlet pipe (13) is connected to a transfer pipe (14) via a flange, and a material taking structure (4) for picking up the pipeline is installed on the outer surface of the transfer pipe (14); The material taking structure (4) comprises a swivel (41) rotatably connected to the outer surface of the transfer tube (14); a mechanical arm (42) is installed on the outer wall of the swivel (41); one end of the mechanical arm (42) is connected to a hydraulic rod (43); the end of the hydraulic rod (43) is connected to a collar (44); the inner cavity of the collar (44) is movably connected to a connecting pipe structure (7) for conveying air; and the end of the connecting pipe structure (7) away from the material taking structure (4) is connected to an air outlet pipe (16); The outer wall of the collar (44) is fixedly connected to a plurality of mounting plates (45) distributed in an annular shape, the side wall of the mounting plate (45) is connected to a first push rod (46), the end of the first push rod (46) is connected to a clamping plate (47) for clamping the connecting pipe structure (7), the side wall of the clamping plate (47) is connected to a transmission structure (5), the transmission structure (5) comprises a second push rod (51) fixedly connected to the side wall of the clamping plate (47), the output end of the second push rod (51) is connected to a push block (52), a rectangular window (54) is provided on a side of the push block (52) that is in contact with the connecting pipe structure (7), a transmission wheel (55) is rotatably connected to the inner wall of the rectangular window (54), and a columnar window (56) is provided on the end of the push block (52) away from the collar (44). The rectangular window (54) is communicated with the cylindrical window (56), and the tightening structure (6) is connected to the inner cavity of the cylindrical window (56). The tightening structure (6) includes a first sleeve (61) rotatably connected to the inner wall of the cylindrical window (56), and the outer wall of the transmission wheel (55) is in contact with the outer wall of the first sleeve (61). The inner wall of the first sleeve (61) is connected to a one-way bearing (62), and the inner wall of the one-way bearing (62) is connected to a second sleeve (63). The inner wall of the second sleeve (63) is provided with a plurality of receiving grooves (64) equidistantly distributed in an annular shape. The inner cavity of the receiving groove (64) is slidably connected to a locking block (65), and one end of the locking block (65) in contact with the fastening bolt (704) is semicircular. One end of the transmission structure (5) is connected to the tightening structure (6).

2. A ventilation system for a shield tunnel according to claim 1, characterized in that: The connecting pipe structure (7) comprises an outer tube body (71), the inner cavity of the outer tube body (71) is slidably connected to the inner tube body (74), and the inner tube body (74) can be automatically reset in the outer tube body (71), one end of the inner tube body (74) is connected to a connecting sleeve (78), the outer surface of the connecting sleeve (78) is sleeved with a first connecting ring (701), one end of the first connecting ring (701) is fixedly connected to a plurality of fastening nuts (702), and the fastening nuts (702) pass through the inner cavity of the first connecting ring (701), one end of the outer tube body (71) away from the first connecting ring (701) is connected to a second connecting ring (703), and the side wall of the second connecting ring (703) is threadedly connected to a plurality of fastening bolts (704), The fastening bolt (704) passes through the inner cavity of the second connecting ring (703); the outer wall of the outer tube body (71) is connected to a clamping structure (10); the end of the clamping structure (10) away from the outer tube body (71) is slidably connected to a connecting structure (3); the connecting structure (3) comprises a hanging rail (31); the top of the hanging rail (31) is connected to a connecting plate (32); the inner wall of the hanging rail (31) is provided with a clamping groove (33); the end of the transfer tube (14) away from the air inlet pipe (13) is connected to a connecting frame (8) through a flange; the inner cavity of the connecting frame (8) is connected to an electromagnet (9); one end of the connecting sleeve (78) is fixedly connected to a magnetic ring (705), and the magnetic ring (705) is magnetically connected to the electromagnet (9).

3. A ventilation system for a shield tunnel according to claim 1, characterized in that: One side of the air supply structure (1) is connected to a feeding structure (2) for pipeline supply, and the feeding structure (2) comprises a protective frame (21), the inner cavity of the protective frame (21) is installed with a slide rail (22) for guiding the pipeline, and the connecting pipe structure (7) is slidably connected to the top of the slide rail (22).

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