Tunnel entrance protection device

Abstract

The present invention belongs to the technical field of tunnel entrance protection, and specifically relates to a tunnel entrance protection device, including an arc-shaped support, support bars are symmetrically provided on the left and right sides of the front side of the arc-shaped support, sliding strips are slidingly sealed in the two cavities, support bars are slidably extended from the upper sides of several support rods, a rebound mechanism is installed between the arc-shaped shielding member and the support bars on both sides, a crossbeam is equipped with several mounting holes from left to right, and a jacking mechanism is installed inside several mounting holes, a blocking cover is installed on the upper side of the sealing block, and the lower inner walls of several mounting holes are provided with through holes connected to the distribution pipe. When a large fallen rock falls on the upper side of the arc-shaped shielding member, the present invention drives the arc-shaped shielding member to move downward, and drives several blocking covers to quickly push out of the mounting holes without using additional electrical equipment, thereby blocking the staff and construction vehicles inside the tunnel.

Description

Technical Field

[0001] The present invention belongs to the technical field of tunnel opening protection, and in particular relates to a tunnel opening protection device. Background Art

[0002] Tunnels are engineering structures buried in the ground and are a form of human utilization of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, and mining tunnels. During the construction process in the tunnel, arc-shaped parts are needed to support the tunnel entrance to prevent rolling rocks from the mountain from falling at the tunnel entrance and causing harm to passing vehicles and workers. However, even with arc-shaped parts for support and protection, there is still a certain danger after some larger rolling rocks fall. During the process of falling rocks, workers and vehicles working in the tunnel cannot detect them in time. If people and vehicles walk out during the process of large rolling rocks falling, there is a certain danger. Therefore, it is very necessary to design a tunnel entrance protection device to prevent people and vehicles working in the tunnel from walking out of the tunnel when large rolling rocks occur. Summary of the Invention

[0003] The purpose of the present invention is to provide a tunnel entrance protection device to solve the problems existing in the background technology.

[0004] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0005] A tunnel entrance protection device comprises an arc-shaped support, wherein support bars are symmetrically provided on the left and right sides of the front side of the arc-shaped support, a cavity is provided inside the two support bars, and sliding bars are slidably sealed in the two cavities, and a plurality of support rods are fixedly connected to the upper sides of the two sliding bars, and the upper sides of the plurality of support rods slide out of the support bars, and the plurality of support rods on both sides are jointly equipped with an arc-shaped shielding member, and a rebound mechanism is provided between the arc-shaped shielding member and the support bars on both sides, and the two support bars are jointly equipped with a crossbeam near the arc-shaped support, and the crossbeam is equipped with a plurality of mounting holes from left to right, and a jacking mechanism is provided inside the plurality of mounting holes, and the jacking mechanism includes a sealing block slidably sealed and assembled in the mounting hole, and a blocking cover is provided on the upper side of the sealing block, and a distribution pipe passing through the crossbeam is connected between the two cavities, and the lower inner walls of the plurality of mounting holes are provided with through holes connected to the distribution pipe.

[0006] A telescopic rod is fixedly connected to the upper side of the sealing block, an upper end of the telescopic rod is fixedly connected to the inner wall of the blocking cover, and a first spring is sleeved on the outer surface of the telescopic rod.

[0007] A plurality of the blocking covers are each provided with a buffer pad on their upper ends.

[0008] The rebound mechanism includes four rebound components, and the four rebound components are fixedly connected to two support bars in pairs. The rebound component includes a mounting seat fixedly connected to the support bar, an inner cavity is provided inside the mounting seat, a second spring is provided inside the inner cavity, a slider is fixedly connected to the upper side of the second spring, a support member is connected to the upper side of the slider, the support member slides upward and extends out of the mounting seat, and the upper end of the support member is provided with a connecting block fixedly connected to the arc-shaped shielding member.

[0009] A limit assembly is provided between the two mounting seats connected to the support bar, and the limit assembly includes a fixing rod, both ends of the fixing rod are fixedly connected to the two mounting seats respectively, and both ends of the fixing rod are provided with mounting cavities, and the inner walls of the two mounting cavities are provided with extension holes that penetrate into the inner cavities, and third springs are installed in the two mounting cavities, and the two third springs are provided with top blocks at one end away from each other, and the two top blocks are provided with arc-shaped locking pieces that penetrate the extension holes and extend into the inner cavity, the fixing rod is equipped with a pulling member connected to the two top blocks, and the slider is provided with a locking hole that matches the arc-shaped locking piece.

[0010] A groove is provided in the middle of the fixing rod, and the inner walls on both sides of the groove are provided with pulling holes connected to the installation cavity. A pulling rod is provided on the side close to each other of the two top blocks, and one end of the two pulling rods passes through the pulling hole and extends into the groove and is equipped with a handle.

[0011] Hydraulic oil is injected into the two cavities.

[0012] A plurality of ventilation holes are provided on the surface of the arc-shaped shielding member.

[0013] The present invention has a simple structure and ingenious design. When a large rock falls on the upper side of the arc-shaped shield, it drives the arc-shaped shield to move downward, and without using additional electrical equipment, it drives a number of blocking covers to quickly push out of the installation holes, thereby blocking the workers and construction vehicles inside the tunnel, preventing the workers and construction vehicles from leaving the tunnel when rockfall occurs. Even if the rock falls from the arc-shaped shield, the arc-shaped shield and the blocking cover will not be reset immediately. Only after outside personnel confirm that the outside world is safe will they drive the arc-shaped shield and the blocking cover to reset. At this time, the workers and construction vehicles in the tunnel can leave the tunnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further illustrated by means of the following non-limiting examples.

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 Schematic diagram of the cross-sectional structure of the present invention Figure 1 ;

[0017] Figure 3 Schematic diagram of the cross-sectional structure of the present invention Figure 2 ;

[0018] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 5 It is a schematic diagram of the local structure of the present invention;

[0020] Figure 6 It is a structural schematic diagram of the arc-shaped shielding member of the present invention;

[0021] Figure 7 Schematic diagram of the cross-sectional structure of the barrier cover of the present invention;

[0022] The main component symbols are described as follows:

[0023] Arc-shaped support 1, support bar 11, cavity 111, slide bar 12, support rod 13, arc-shaped shielding member 14, crossbeam 2, mounting hole 21, sealing block 22, blocking cover 23, distribution pipe 24, through hole 25, telescopic rod 3, first spring 31, mounting seat 32, inner cavity 33, second spring 34, slider 35, support member 37, connecting block 38, fixing rod 4, mounting cavity 41, extension hole 42, third spring 43, top block 44, arc-shaped locking member 45, locking hole 46, groove 5, pulling hole 51, pulling rod 52, handle 53, air vent 54. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0025] like Figure 1-7 As shown, a tunnel entrance protection device of the present invention includes an arc-shaped support 1, a support bar 11 is symmetrically provided on the front side of the arc-shaped support 1, a cavity 111 is provided inside the two support bars 11, and a slide bar 12 is slidably and sealedly installed in the two cavities 111. The upper sides of the two slide bars 12 are fixedly connected to a plurality of support rods 13, and the upper sides of the plurality of support rods 13 are slidably extended out of the support bar 11, and the plurality of support rods 13 on both sides are jointly equipped with an arc-shaped shielding member 14, and the arc-shaped shielding member 14 is connected to the support bars 11 on both sides. A rebound mechanism is installed between them, and a crossbeam 2 is commonly installed on one side of the two support bars 11 near the arc-shaped support 1. The crossbeam 2 is equipped with several mounting holes 21 from left to right, and several mounting holes 21 are equipped with jacking mechanisms. The jacking mechanism includes a sealing block 22 with a sliding seal assembled in the mounting hole 21, and a blocking cover 23 is installed on the upper side of the sealing block 22. A distribution pipe 24 that passes through the crossbeam 2 is provided between the two cavities 111, and the lower inner walls of several mounting holes 21 are provided with through holes 25 connected to the distribution pipe 24.

[0026] The arc support 1 is installed at the tunnel entrance, the arc shield 14 is installed outside the tunnel entrance, and the crossbeam 2 is buried in the ground. The arc support 1 supports the inner wall of the tunnel entrance to prevent collapse, while the arc shield 14 is installed outside the tunnel entrance to block external rolling stones and prevent falling rocks from causing harm to vehicles and personnel entering and leaving the tunnel;

[0027] When a larger rolling stone falls, it lands on the upper side of the arc-shaped shielding member 14. Due to the larger weight of the larger rolling stone, the arc-shaped shielding member 14 moves downward, the rebound mechanism is compressed, and the arc-shaped shielding member 14 drives the slide bars 12 in the cavities 111 on both sides to move downward through the plurality of support rods 13. The slide bars 12 squeeze the air under the cavity 111, squeeze the air in the cavities 111 on both sides into the distribution pipe 24, and press the air into the plurality of mounting holes 21 through the plurality of through holes 25, thereby driving the sealing block 22 in the mounting hole 21 to move upward, and the sealing block 22 drives the blocking cover 23. The mounting hole 21 extends upward. Since the crossbeam 2 is located on the side of the support bar 11 close to the arc-shaped support 1, when the blocking covers 23 extend out of the mounting hole 21, the blocking covers 23 are located in a row at the entrance of the tunnel, so that vehicles and personnel in the tunnel can be blocked and vehicles and personnel in the tunnel can be blocked from leaving the tunnel. This design can quickly extend the blocking covers 23 from the mounting hole 21 to block heavy rolling stones falling on the upper side of the arc-shaped shielding member 14 without using other electrical equipment, thereby ensuring the safety of construction vehicles and construction personnel.

[0028] The upper side of the sealing block 22 is fixedly connected to the telescopic rod 3 , the upper end of the telescopic rod 3 is fixedly connected to the inner wall of the blocking cover 23 , and the outer surface of the telescopic rod 3 is sleeved with a first spring 31 .

[0029] When the sealing block 22 moves upward, the blocking cover 23 is driven to quickly extend out of the mounting hole 21 through the telescopic rod 3. However, when there are people and vehicles directly above the blocking cover 23, the blocking cover 23 is blocked and will not move upward. Therefore, during the upward movement of the sealing block 22, the telescopic rod 3 and the first spring 31 begin to compress. In this way, when the sealing block 22 moves upward, if there is an obstruction at the blocking cover 23, the blocking cover 23 will not be forced to extend upward. With this design, when there are people or vehicles blocking one or more of the blocking covers 23, the blocking cover 23 will not be forced to extend out of the mounting hole 21, causing damage to the vehicles and people on the upper side of the blocking cover 23.

[0030] The upper ends of the plurality of blocking covers 23 are all provided with cushioning pads. The design of the cushioning pads can reduce the impact on the personnel and vehicles above when the blocking cover 23 moves upwards.

[0031] The rebound mechanism includes four rebound components, and the four rebound components are fixedly connected to the two support bars 11 in pairs. The rebound component includes a mounting seat 32 fixedly connected to the support bar 11, an inner cavity 33 is provided inside the mounting seat 32, and a second spring 34 is provided inside the inner cavity 33. A slider 35 is fixedly connected to the upper side of the second spring 34, and a support member 37 is connected to the upper side of the slider 35. The support member 37 slides upward and extends out of the mounting seat 32. The upper end of the support member 37 is provided with a connecting block 38 fixedly connected to the arc-shaped shielding member 14.

[0032] When a larger rolling stone falls on the arc-shaped shielding member 14, it drives the arc-shaped shielding member 14 to move downward, and the arc-shaped shielding member 14 drives the connecting block 38 to move downward. The connecting block 38 drives the slider 35 to move downward in the inner cavity 33 through the support member 37, so that the second spring 34 can be compressed. After the stone falls, the second spring 34 stretches and drives the slider 35 to move upward and reset. The slider 35 drives the arc-shaped shielding member 14 to move upward and reset through the support member 37.

[0033] A limit assembly is provided between the two mounting seats 32 connected to the support bar 11, and the limit assembly includes a fixing rod 4, both ends of the fixing rod 4 are fixedly connected to the two mounting seats 32 respectively, and both ends of the fixing rod 4 are provided with mounting cavities 41, and the inner walls of the two mounting cavities 41 are provided with extension holes 42 that penetrate into the inner cavity 33, and the two mounting cavities 41 are equipped with third springs 43, and the two third springs 43 are provided with top blocks 44 at one end away from each other, and the two top blocks 44 are provided with arc-shaped locking pieces 45 that penetrate the extension holes 42 and extend into the inner cavity 33, and the fixing rod 4 is equipped with a pulling member connected to the two top blocks 44, and the slider 35 is provided with a locking hole 46 that matches the arc-shaped locking piece 45.

[0034] When the arc-shaped shielding member 14 moves downward, the supporting member 37 and the slider 35 are driven downward by the connecting block 38. When the lower end of the slider 35 squeezes the arc-shaped locking member 45, the arc-shaped locking member 45 is squeezed into the mounting cavity 41 due to its arc-shaped end face, and the top block 44 is driven to move in the inner cavity 33, and the third spring 43 is compressed until the slider 35 moves past the arc-shaped locking member 45 and the locking hole 46 matches the position of the arc-shaped locking member 45. 43 stretches, it drives the top block 44 to push out the arc-shaped locking piece 45, and pushes the arc-shaped locking piece 45 into the lock hole 46, so that the position of the slider 35 can be limited. With this design, after the falling stone falls on the upper side of the arc-shaped shielding piece 14, the falling stone rolls down from the upper side of the arc-shaped shielding piece 14. At this time, the slider 35 will not be immediately reset under the action of the extension of the second spring 34, so that the arc-shaped shielding piece 14 will not be immediately reset, thereby keeping the air squeezed in the mounting hole 21. When the locking cam 35 is in the closed position, the locking cam 35 is in the closed position, and the locking cam 35 is in the closed position, so that the locking cam 35 is in the closed position.

[0035] A groove 5 is provided in the middle of the fixing rod 4, and the inner walls on both sides of the groove 5 are provided with pulling holes 51 connected to the installation cavity 41. A pulling rod 52 is provided on the side close to each other of the two top blocks 44. One end of the two pulling rods 52 passes through the pulling hole 51 and extends into the groove 5 and is equipped with a handle 53.

[0036] When outsiders observe that no more rockfall occurs, two staff members stand beside the fixed rods 4 on both sides and pull the two handles 53 on both sides at the same time. By pulling the rods 52, the top blocks 44 on both sides are driven to move closer to each other, and the third springs 43 on both sides begin to compress, thereby canceling the limit on the slider 35.

[0037] Hydraulic oil is injected into both cavities 111. The design of the hydraulic oil can improve the ejection efficiency of the plurality of sealing blocks 22.

[0038] The surface of the arc-shaped shielding member 14 is provided with a plurality of air holes 54. The design of the plurality of air holes 54 can maintain the ventilation effect while maintaining the arc-shaped shielding member 14 to block falling rocks.

[0039] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A tunnel entrance protection device, comprising an arc-shaped support (1), characterized in that: The front side of the arc support (1) is symmetrically provided with support bars (11), and a cavity (111) is provided inside the two support bars (11). The two cavities (111) are both equipped with slide bars (12) in a sliding and sealing manner. The upper sides of the two slide bars (12) are fixedly connected with a plurality of support rods (13). The upper sides of the plurality of support rods (13) are slidably extended out of the support bar (11). The plurality of support rods (13) on both sides are jointly equipped with an arc shielding member (14). A rebound mechanism is assembled between the arc shielding member (14) and the support bars (11) on both sides. The two support bars (11) are jointly equipped with a crossbeam (2) on the side close to the arc support (1). The crossbeam (2) is equipped with a plurality of mounting holes (21) from left to right. A lifting mechanism is assembled inside the plurality of mounting holes (21). The lifting mechanism includes a sealing block (22) which is slidingly and sealingly assembled in the mounting hole (21). The upper side of the sealing block (22) is equipped with a blocking cover (23); a distribution pipe (24) passing through the crossbeam (2) is provided between the two cavities (111); the inner walls of the lower sides of the plurality of mounting holes (21) are provided with through holes (25) communicating with the distribution pipe (24); the rebound mechanism includes four rebound components, and the four rebound components are fixedly connected to the two support bars (11) in pairs; the rebound component includes a mounting seat (32) fixedly connected to the support bar (11); an inner cavity (33) is provided inside the mounting seat (32); a second spring (34) is provided inside the inner cavity (33); a slider (35) is fixedly connected to the upper side of the second spring (34); a support member (37) is connected to the upper side of the slider (35); the support member (37) slides upward and extends out of the mounting seat (32); the upper end of the support member (37) is provided with a connecting block (38) fixedly connected to the arc-shaped shielding member (14).

2. The tunnel entrance protection device according to claim 1, characterized in that: A telescopic rod (3) is fixedly connected to the upper side of the sealing block (22), the upper end of the telescopic rod (3) is fixedly connected to the inner wall of the blocking cover (23), and a first spring (31) is sleeved on the outer surface of the telescopic rod (3).

3. The tunnel entrance protection device according to claim 1, characterized in that: The upper ends of the plurality of blocking covers (23) are each provided with a buffer pad.

4. The tunnel entrance protection device according to claim 1, characterized in that: A limiting assembly is provided between the two mounting seats (32) connected to the support bar (11), and the limiting assembly includes a fixing rod (4), the two ends of the fixing rod (4) are fixedly connected to the two mounting seats (32), both ends of the fixing rod (4) are provided with mounting cavities (41), the inner walls of the two mounting cavities (41) are provided with extension holes (42) that penetrate into the inner cavity (33), and the two mounting cavities (41) are equipped with third springs (43), and the two third springs (43) are provided with top blocks (44) at one end away from each other, and the two top blocks (44) are provided with arc-shaped locking pieces (45) that penetrate the extension holes (42) and extend into the inner cavity (33), the fixing rod (4) is equipped with a pulling member connected to the two top blocks (44), and the slider (35) is provided with a locking hole (46) that matches the arc-shaped locking piece (45).

5. The tunnel entrance protection device according to claim 4, characterized in that: A groove (5) is provided in the middle of the fixing rod (4), and the inner walls on both sides of the groove (5) are provided with pulling holes (51) connected to the installation cavity (41). The two top blocks (44) are provided with pulling rods (52) on the side close to each other, and one end of the two pulling rods (52) passes through the pulling hole (51) and extends into the groove (5) and is equipped with a handle (53).

6. The tunnel entrance protection device according to claim 1, characterized in that: Hydraulic oil is injected into both cavities (111).

7. The tunnel entrance protection device according to claim 1, characterized in that: A plurality of air holes (54) are provided on the surface of the arc-shaped shielding member (14).

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