A rockburst protection device

Abstract

This invention provides a rockburst protection device, belonging to the field of tunnel construction protection devices. It includes a frame with protective mechanisms on both sides. Each protective mechanism includes a protective net, and chains are installed on both the front and rear sides of the net. Limit blocks are installed between adjacent links of the chains. When unfolded, the chains form a quarter-circle shape. A winding / unwinding mechanism for winding or unwinding the chains is located at the top of the frame. Positioning sleeves are located on both sides of the bottom of the frame. The winding / unwinding mechanism is fixedly connected to one end of the chain via a connecting strap. The end of the chain furthest from the winding / unwinding mechanism is detachably installed inside the positioning sleeve. This invention allows for quick and convenient winding after use, thereby reducing the space occupied inside the tunnel.

Description

Technical Field

[0001] This invention relates to the field of tunnel construction protection devices, and more specifically, to a rockburst protection device. Background Technology

[0002] Rockburst, also known as rock burst, occurs when the stress balance of the rock mass is disrupted by human disturbance during tunnel excavation under high ground stress. This disruption leads to stress redistribution and the accumulation of high-level stress in the surrounding rock sections, causing a large amount of energy to accumulate in localized areas. When the accumulated energy significantly exceeds the energy required for rock fracture, a powerful rock fragment ejection occurs, releasing the accumulated energy as kinetic energy. It is a highly destructive geological hazard caused by the dynamic instability of the surrounding rock. Existing protective equipment typically uses simple protective covers, which usually lack retractable functionality and occupy considerable space within the tunnel. Summary of the Invention

[0003] The purpose of this invention is to provide a rockburst protection device that can be quickly and easily rolled up after use, thereby reducing the space occupied inside the tunnel.

[0004] The embodiments of the present invention are achieved through the following technical solution: a rockburst protection device includes a frame, with protective mechanisms provided on both the left and right sides of the frame. Each protective mechanism includes a protective net, and chains are provided on both the front and rear sides of the protective net. Limiting blocks are provided between adjacent links of the chains. When the chains are unfolded, they form a 1 / 4 arc shape. A winding and unwinding mechanism for winding or unwinding the chains is provided at the top of the frame. Positioning sleeves are provided on both sides of the bottom of the frame. The winding and unwinding mechanism is fixedly connected to one end of the chain via a connecting belt. The end of the chain away from the winding and unwinding mechanism is detachably installed inside the positioning sleeve.

[0005] Furthermore, the take-up and take-down mechanism includes two support frames, both of which are fixedly mounted on the top of the frame and located on the front and rear sides of the frame respectively. One of the support frames is equipped with two winding motors, and each winding motor has a winding shaft on its output shaft. The end of the winding shaft away from the winding motor is rotatably connected to the other support frame, and the end of the connecting belt away from the chain is fixedly connected to the winding shaft.

[0006] Furthermore, the support frame includes a base frame and a top frame. The base frame is fixedly mounted on the frame body, and a drive cylinder is mounted on the base frame. The top frame is fixedly mounted on the piston rod of the drive cylinder.

[0007] Furthermore, the frame includes a bottom frame, a middle frame, and a top frame, and lifting cylinders are provided between the bottom frame and the middle frame, and between the middle frame and the top frame.

[0008] Furthermore, a first extension plate is slidably provided on both sides of the bottom frame, and a driving mechanism is provided in the middle of the bottom frame for driving the two first extension plates to move toward or away from each other.

[0009] Furthermore, the driving mechanism includes a driving base with a sliding groove inside. A double-ended lead screw is rotatably mounted in the sliding groove. A driving motor for driving the double-ended lead screw to rotate is provided at one end of the driving base. A driving block is slidably arranged in the sliding groove. Both driving blocks have threaded holes and are respectively threaded to the two ends of the double-ended lead screw. A driving rod is provided at the end of the driving block facing out of the sliding groove. The driving rods of the two driving blocks are respectively fixedly connected to two first extension plates.

[0010] Furthermore, a second extension plate is slidably provided at both ends of the middle frame, and the two second extension plates are respectively arranged above the first extension plate. The second extension plates are connected to the first extension plate by telescopic rods.

[0011] Furthermore, the positioning sleeve is fixedly mounted on the first extension plate, and a plug rod is provided at the end of the chain away from the take-up and release mechanism. A plug groove for inserting the plug rod is opened on the side of the positioning sleeve away from the take-up and release mechanism. A limit groove is opened at the top of the positioning sleeve, and a limit piece is inserted in the limit groove. The limit piece abuts against the plug rod and can prevent the plug rod from moving out of the plug groove.

[0012] Furthermore, the protective net includes multiple rigid support rods and multiple flexible connecting rods. The multiple rigid support rods are distributed along the length of the chain, and the two ends of the rigid support rods are respectively connected to two chains. The multiple flexible connecting rods are all arranged perpendicular to the rigid support rods and distributed along the length of the rigid support rods.

[0013] Furthermore, both the first extension plate and the second extension plate are perforated mesh panels.

[0014] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0015] 1. This invention protects the frame by setting up a protective mechanism consisting of chains and a protective net, and unfolds or retracts the protective mechanism through a retraction mechanism, so as to facilitate the quick unfolding of the protective mechanism to a specified state during use and the quick storage of the protective mechanism after use.

[0016] 2. The present invention provides a first extension plate and a second extension plate on the bottom frame and the middle frame, and connects the first extension plate and the second extension plate by a telescopic rod. When the driving mechanism drives the first extension plate to unfold or retract, it can drive the second extension plate to unfold or retract at the same time, so as to facilitate the quick unfolding of the frame to a specified state for use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the rockburst protection device provided by the present invention;

[0019] Figure 2 This is a schematic diagram of the protective mechanism of the present invention;

[0020] Figure 3 This is a schematic diagram of the retraction mechanism of the present invention when the drive cylinder lifts the top frame.

[0021] Figure 4 This is a schematic diagram of the positioning sleeve of the present invention;

[0022] Figure 5 This is a schematic diagram of the frame structure of the present invention;

[0023] Figure 6 This is a schematic diagram of the drive mechanism of the present invention;

[0024] Icons: 1-Frame, 11-Bottom Frame, 111-First Extension Plate, 12-Middle Frame, 121-Second Extension Plate, 122-Telescopic Rod, 13-Top Frame, 14-Drive Mechanism, 141-Drive Seat, 142-Double-Ended Screw, 143-Drive Motor, 144-Drive Block, 145-Drive Rod, 15-Lifting Cylinder, 2-Protective Mechanism, 21-Protective Net, 211-Rigid Support Rod, 212-Flexible Connecting Rod, 22-Chain, 221-Limit Block, 222-Plug-in Rod, 3-Retracting Mechanism, 31-Connecting Belt, 32-Support Frame, 321-Bottom Frame, 322-Top Frame, 323-Drive Cylinder, 33-Winding Motor, 34-Winding Shaft, 4-Positioning Sleeve, 41-Plug-in Slot, 42-Limit Slot, 43-Limit Plate. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0027] Example 1

[0028] The following description, in conjunction with specific embodiments, provides further details. Figure 1 , Figure 2 As shown, this invention is a rockburst protection device, including a frame 1. A set of protective mechanisms 2 is arranged on each of the left and right sides of the frame 1, respectively protecting the frame 1. The protective mechanism 2 includes a protective net 21. Chains 22 are provided on both the front and rear sides of the protective net 21. A limiting block 221 is provided between each adjacent link of the chain 22. Under the action of the limiting block 221, the chain 22 unfolds to form a quarter-circle shape. The chains 22 on both sides drive the two protective nets 21 to form a semi-circle, which is adapted to the cross-sectional shape of the tunnel.

[0029] Reference Figure 2 As shown, the protective net 21 includes multiple rigid support rods 211 and multiple flexible connecting rods 212. The rigid support rods 211 are distributed along the length of the chain 22, and both ends of the rigid support rods 211 are respectively connected to two chains 22 in the same set of protective components. The multiple flexible connecting rods 212 are all arranged perpendicular to the rigid support rods 211 and distributed along the length of the rigid support rods 211. The rigid support rods 211 can strengthen the protective net 21, enabling it to achieve the expected protective effect. The flexible connecting rods 212 allow the protective net 21 to be rolled up for easy storage.

[0030] Reference Figure 1 , Figure 3 As shown, the top of the frame 1 is equipped with a winding / unwinding mechanism 3 for winding or unwinding the chain 22, and the bottom sides of the frame 1 are equipped with positioning sleeves 4. The winding / unwinding mechanism 3 includes a connecting belt 31. One end of the chain 22 is fixedly connected to the connecting belt 31, and the other end is detachably installed in the positioning sleeve 4. After the chain 22 is unwound by the winding / unwinding mechanism 3, the bottom end of the chain 22 is installed in the positioning sleeve 4. The links of the chain 22 are fixed in position to each other under the action of the limiting block 221, and the overall shape of the chain 22 is fixed. The protective net 21 is unfolded to the designated state under the drive of the chain 22, which can block the rock fragments generated when the rock burst occurs, thereby protecting the workers on the frame 1.

[0031] Reference Figure 3As shown, the take-up and release mechanism 3 includes two support frames 32, both of which are fixedly installed on the top of the frame 1 and located on the front and rear sides of the frame 1 respectively. Two winding motors 33 are installed on one of the support frames 32, and each winding motor 33 has a winding shaft 34 on its output shaft. The two winding shafts 34 can respectively wind up the two sets of protective mechanisms 2 to improve the winding efficiency. The end of the winding shaft 34 away from the winding motor 33 is rotatably connected to the other support frame 32, and the end of the connecting belt 31 away from the chain 22 is fixedly connected to the winding shaft 34. When the end of the chain 22 away from the take-up and release mechanism 3 is removed from the positioning sleeve 4, the winding motor 33 is started to drive the winding shaft 34 to rotate, which can wind the connecting belt 31 onto the winding shaft 34. After the connecting belt 31 is wound up, the chain 22 and the protective net 21 begin to be wound onto the winding shaft 34, thereby realizing the winding process of the protective mechanism 2.

[0032] Reference Figure 3 As shown, the support frame 32 includes a base frame 321 and a top frame 322. The base frame 321 is welded to the frame body 1, and a drive cylinder 323 is installed on the base frame 321. The top frame 322 is fixedly installed on the piston rod of the drive cylinder 323. When the protective mechanism 2 is wound up, the drive cylinder 323 is activated to move the top frame 322 upward, so that the height of the winding motor 33 is higher than the height of the highest point of the chain 22, enabling the winding motor 33 to wind up the protective mechanism 2. After the protective mechanism 2 is wound up, the drive cylinder 323 is activated to move the top frame 322 downward, thereby reducing the height of the top frame 322 and the winding motor 33, so that the height of the winding motor 33 is level with the height of the highest point of the chain 22, thus reducing the overall height of the rockburst protection device and preventing the overall height from exceeding the height of the tunnel's highest point, thus preventing it from entering the tunnel.

[0033] Reference Figure 1 , Figure 4 As shown, the positioning sleeve 4 is welded to the first extension plate 111. The end of the chain 22 away from the take-up and unwinding mechanism 3 is provided with a plug rod 222. The side of the positioning sleeve 4 away from the take-up and unwinding mechanism 3 is provided with a plug groove 41 for the plug rod 222 to be inserted. When the chain 22 is unwound, the plug rod 222 at the bottom of the chain 22 enters the positioning sleeve 4 from the plug groove 41 on the side. The top of the positioning sleeve 4 is provided with a limiting groove 42, and a limiting piece 43 is inserted in the limiting groove 42. When the limiting piece 43 is inserted into the limiting groove 42, the limiting piece 43 abuts against the plug rod 222 and can prevent the plug rod 222 from moving out of the plug groove 41, thereby fixing the position of the plug rod 222.

[0034] Reference Figure 5As shown, the frame 1, from bottom to top, includes a bottom frame 11, a middle frame 12, and a top frame 13. Lifting cylinders 15 are installed between the bottom frame 11 and the middle frame 12, and between the middle frame 12 and the top frame 13. The lifting cylinder 15 installed on the bottom frame 11 can move the middle frame 12 upwards, and the lifting cylinder 15 installed on the middle frame 12 can move the top frame 13 upwards. This allows the height of the frame 1 to be adjusted as needed, and also facilitates lowering the height of the frame 1 for easy transportation after use.

[0035] Reference Figure 5 As shown, first extension plates 111 are slidably mounted on both sides of the bottom frame 11, and a drive mechanism 14 is disposed in the middle of the bottom frame 11 to drive the two first extension plates 111 to move closer to or further away from each other. Second extension plates 121 are slidably mounted on both ends of the middle frame 12, with each second extension plate 121 corresponding to one of the first extension plates 111 and connected to the first extension plates 111 via a telescopic rod 122. When the drive mechanism 14 moves the two first extension plates 111, the second extension plates 121 can move simultaneously with the first extension plates 111 under the drive of the telescopic rod 122. The telescopic rod 122 includes a telescopic sleeve and a rod body slidably inserted within the telescopic sleeve, thus the telescopic rod 122 can adapt to changes in the height of the second extension plates 121 when the middle frame 12 rises or falls.

[0036] In this embodiment, both the first extension plate 111 and the second extension plate 121 are made of perforated mesh. Since the first extension plate 111 and the second extension plate 121 only need to support the weight of one person, there is no need to use solid steel plates; the load requirements can be met by using perforated mesh. Using perforated mesh can reduce the overall weight of the first extension plate 111 and the second extension plate 121, thereby reducing the stress on the bottom frame 11 and the middle frame 12, and at the same time reducing the force required to be applied by the drive mechanism 14.

[0037] Reference Figure 5 , Figure 6As shown, the drive mechanism 14 includes a drive base 141 with a groove inside. A double-ended lead screw 142 is rotatably mounted in the groove. One end of the drive base 141 is equipped with a drive motor 143 for driving the double-ended lead screw 142 to rotate. Drive blocks 144 are slidably connected in the groove. Both drive blocks 144 have threaded holes and are threaded to both ends of the double-ended lead screw 142. A drive rod 145 is provided at the end of the drive block 144 facing out of the groove. The drive rods 145 of the two drive blocks 144 are fixedly connected to the two first extension plates 111 respectively. When the drive motor 143 is started, it drives the double-ended lead screw 142 to rotate. The two drive blocks 144 in the groove move simultaneously in a direction closer to or further away from each other. This causes the two first extension plates 111 to simultaneously unfold in a direction further away from each other or simultaneously retract in a direction closer to each other through the drive rods 145.

[0038] The working process of this embodiment is as follows: When in use, the middle frame 12 and the top frame 13 are raised to a specified height by the lifting cylinder 15. Then, the first extension plate 111 is unfolded by the drive mechanism 14. The first extension plate 111 is simultaneously unfolded by the telescopic rod 122. Then, the chain 22 and the protective net 21 are unwound by the winding mechanism 3. The insertion rod 222 at the lowest end of the chain 22 is inserted into the positioning sleeve 4. The position of the insertion rod 222 is limited by the limiting piece 43, which can ensure the stability of the protective mechanism 2 to a certain extent, so as to protect the workers standing on the frame 1.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rockburst protection device, characterized by: The utility model relates to a kind of protective fence, including frame (1), the left and right sides of the frame (1) are provided with protection mechanism (2), the protection mechanism (2) includes protective screen (21), the front and back sides of the protective screen (21) are provided with chain (22), limiting block (221) is arranged between the adjacent two links of the chain (22), the chain (22) forms 1 / 4 circular arc after unfolding, the top of the frame (1) is provided with winding mechanism (3) for winding or unwinding chain (22), the bottom of the frame (1) both sides is provided with positioning sleeve (4), the winding mechanism (3) is fixedly connected with the one end of chain (22) by connecting belt (31), the one end of chain (22) away from winding mechanism (3) is detachably arranged in positioning sleeve (4); The winding mechanism (3) includes two support frames (32), two The support frames (32) are fixedly arranged on the top of the frame (1) and are located at the front and back sides of the frame (1), respectively, one of the support frames (32) is provided with two winding motors (33), the output shaft of the winding motor (33) is provided with a winding shaft (34), the winding shaft (34) is rotatably connected to the other support frame (32) at the end away from the winding motor (33), and the end of the connecting belt (31) away from the chain (22) is fixedly connected to the winding shaft (34). The protective screen (21) includes a plurality of rigid support rods (211) and a plurality of flexible connecting rods (212), the plurality of rigid support rods (211) are distributed along the length direction of the chain (22), the two ends of the rigid support rod (211) are connected to the two chains (22), respectively, and the plurality of flexible connecting rods (212) are perpendicular to the rigid support rods (211) and are distributed along the length direction of the rigid support rods (211).

2. Rockburst protection device according to claim 1, characterized in that: The support frame (32) includes a base frame (321) and a top frame (322), the base frame (321) is fixedly arranged on the frame (1), and the base frame (321) is provided with a drive cylinder (323).

3. The rockburst mitigation device of claim 1, wherein: The frame (1) includes a bottom frame (11), a middle layer frame (12) and a top frame (13), and a lifting cylinder (15) is arranged between the bottom frame (11) and the middle layer frame (12) and between the middle layer frame (12) and the top frame (13).

4. Rockburst protection device according to claim 3, characterized in that: The two sides of the bottom frame (11) are slidably provided with first extension plates (111), and the middle part of the bottom frame (11) is provided with a driving mechanism (14) for driving the two first extension plates (111) to move towards each other or away from each other.

5. Rockburst protection device according to claim 4, characterized in that: The driving mechanism (14) comprises a driving base (141), a sliding groove is formed in the driving base (141), a double-head screw (142) is rotatably installed in the sliding groove, a driving motor (143) for driving the double-head screw (142) to rotate is arranged at one end of the driving base (141), driving blocks (144) are slidably arranged in the sliding groove, the two driving blocks (144) are both provided with threaded holes and are respectively threadedly connected to two ends of the double-head screw (142), driving rods (145) are arranged at ends of the driving blocks (144) away from the sliding groove, and the driving rods (145) of the two driving blocks (144) are respectively fixedly connected with two first extension plates (111).

6. The rockburst mitigation device of claim 4, wherein: Second extension plates (121) are slidably arranged at two ends of the middle layer frame (12), and the two second extension plates (121) are arranged above the first extension plates (111) in a one-to-one correspondence.

7. The rockburst mitigation device of claim 4, wherein: The positioning sleeve (4) is fixedly arranged on the first extension plate (111), one end of the chain (22) away from the winding and unwinding mechanism (3) is provided with a plug-in rod (222), a plug-in groove (41) for the plug-in rod (222) to be inserted is formed in a side of the positioning sleeve (4) away from the winding and unwinding mechanism (3), a limiting groove (42) is formed in the top of the positioning sleeve (4), a limiting piece (43) is inserted into the limiting groove (42), the limiting piece (43) abuts against the plug-in rod (222) and can block the plug-in rod (222) from moving out of the plug-in groove (41).

8. The rockburst mitigation device of claim 6, wherein: The first extension plate (111) and the second extension plate (121) are both hollow mesh plates.

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