High-energy low-loss blasting protection device for large-section tunnel

Abstract

The utility model relates to tunnel blasting technical field, and disclose a big section tunnel high energy low loss blasting protection device, including fixed frame, protection board subassembly and buffer board, the outer wall fixed mounting of protection board subassembly has the guide block, the outer wall of guide block has the thread hole no.

Description

Technical Field

[0001] This utility model relates to the field of tunnel blasting technology, specifically a high-energy, low-damage blasting protection device for large-section tunnels. Background Technology

[0002] The high-energy, low-damage blasting protection device for large-section tunnels is a specialized protective equipment developed to address the pain points of impact damage and flying debris during blasting construction in large-section tunnels. The device employs a high-strength composite protective panel and a multi-stage buffer energy-absorbing structure design, effectively resisting the shock waves and debris impacts generated by high-energy blasts. This significantly reduces the risk of surrounding rock disturbance and support structure damage. Its modular splicing design adapts to different cross-sectional sizes, facilitating easy installation and disassembly while balancing construction efficiency and reusability. The built-in energy attenuation layer utilizes the gradient energy absorption principle to achieve layered dissipation of blasting energy, ensuring the safety of construction personnel and equipment while reducing the workload of surrounding rock repair after blasting. This device effectively solves the industry problem of low efficiency and high loss in blasting protection for large-section tunnels, providing reliable safety assurance for high-quality tunnel construction.

[0003] Chinese Utility Model Patent Publication No. CN223610716U discloses a protective device for flying rocks during tunnel excavation blasting. The specification of this device states that its modular structure facilitates assembly and disassembly, making it easy to store and transport disassembled components. It also ensures the stability of the assembled structure and provides good impact resistance. Through the inclusion of buffer plates and multiple sets of elastic connecting components, it can buffer the impact of explosions and reduce the destructive force on the device. However, this protective device only uses inserts and slots for assembly and lacks a locking structure. After assembly, it is prone to loosening, resulting in low stability, poor practicality, and limited applicability. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a high-energy, low-damage blasting protection device for large-section tunnels. It can effectively solve the problems in the prior art, which only uses plugs and slots for splicing, without a locking structure, which makes it easy to loosen after splicing, has low stability, poor practicality, and is not convenient for widespread use.

[0005] The technical solution adopted by this utility model is: a high-energy, low-damage blasting protection device for large-section tunnels, including a fixed frame, a protective plate assembly and a buffer plate. A guide block is fixedly installed on the outer wall of the protective plate assembly. A threaded hole is opened on the outer wall of the guide block. A guide groove and a threaded hole are opened on the outer wall of the fixed frame. Bolts are threadedly connected to the outer wall of the fixed frame. A support frame is fixedly installed on the side of the protective plate assembly away from the buffer plate. A buffer assembly is provided between the protective plate assembly and the buffer plate.

[0006] Preferably, the protective plate assembly includes a first protective plate, a second protective plate, and a third protective plate. A positioning groove is formed at the end of the second protective plate near the first protective plate, and a positioning block is fixedly installed on the inner wall of the positioning groove. A positioning block and a fixing seat are fixedly installed at the end of the first protective plate near the second protective plate, and at the end of the second protective plate near the third protective plate. A positioning groove is formed on the outer wall of the positioning block. A fixing seat is fixedly installed at the end of the second protective plate near the first protective plate, and at the end of the third protective plate near the first protective plate. The inner wall of the first fixed seat is fixedly equipped with slide rod 1 and slide rod 2. The outer wall of slide rod 1 is slidably connected to a movable plate. The outer wall of the movable plate is fixedly equipped with spring 2. The outer wall of slide rod 2 is slidably connected to a movable sleeve. The outer wall of the movable sleeve is fixedly equipped with spring 3 and a pull rod. The outer wall of the first fixed seat is rotatably equipped with a rotating plate. The outer wall of the rotating plate is provided with a slot. The end of the movable plate away from the movable sleeve is fixedly equipped with a limit block. The inner wall of the second fixed seat is provided with a limit groove. The positioning block 1 and the positioning groove 1 are inserted into each other. The positioning block 2 and the positioning groove 2 are inserted into each other.

[0007] Using the above technical solution, the staff inserts positioning block one into the interior of positioning slot one, and simultaneously inserts positioning block two into the interior of positioning slot two, which can achieve rapid positioning of protective plate one, protective plate two, and protective plate three.

[0008] Preferably, the limiting block is adapted to the limiting groove, the second spring is located outside the first slide rod, and the third spring is located outside the second slide rod.

[0009] Through the above technical solution, during the rapid positioning of protective plate one, protective plate two, and protective plate three, when the limiting block contacts the fixed seat two, the spring two extends, causing the moving plate to move inward. When the positioning block one is completely submerged in the positioning groove one, the spring two rebounds, causing the moving plate to move outward, thereby allowing the limiting block to be engaged in the limiting groove. This enables the rapid splicing of protective plate one, protective plate two, and protective plate three, facilitating quick assembly and disassembly during use or assembly, and improving assembly efficiency.

[0010] Preferably, the pull rod is adapted to the slot.

[0011] With the above technical solution, when disassembling protective plate one, protective plate two, and protective plate three, the worker pulls the lever, causing the moving sleeve to move to the left. The moving sleeve presses down on the moving plate, causing the moving plate to move inward, so that the limiting block disengages from the limiting groove. Then, the rotating plate is rotated, causing the lever to engage with the slot, so that the limiting block is always disengaged from the limiting groove. Finally, the limiting block is pulled out of the fixing seat two, which can achieve quick disassembly of protective plate one, protective plate two, and protective plate three, and has high practicality.

[0012] Preferably, the guide block and the guide groove are installed by insertion, and the bolt extends through the second threaded hole to the interior of the first threaded hole, and the second threaded hole and the first threaded hole have the same diameter.

[0013] With the above technical solution, the staff inserts the guide block into the guide groove and then extends the bolt through the threaded hole two into the threaded hole one, which can realize the quick installation of the protective plate assembly. After long-term use, it is convenient to inspect or replace it.

[0014] Preferably, the cross-section of the support frame is triangular, and three identical support frames are provided, which are distributed at equal intervals.

[0015] Through the above technical solution and the design of the support frame, the stability of the triangle is improved, the load-bearing capacity of the support frame is improved, and the support failure caused by bending deformation is avoided, resulting in high stability.

[0016] Preferably, the buffer assembly includes a mounting base, a connecting rod is fixedly mounted on one end of the buffer plate near the protective plate assembly, a movable groove is formed on the inner wall of the mounting base, a spring is provided on the inner wall of the movable groove, the connecting rod is slidably connected to the movable groove, the spring is located between the connecting rod and the mounting base, and multiple identical buffer assemblies are provided, with the multiple buffer assemblies distributed at equal intervals.

[0017] Through the above technical solution, during blasting, the blasting impact acts on the buffer plate, the buffer plate pushes the connecting rod to compress the spring, and the spring absorbs a large amount of impact energy through deformation, so that the energy transmitted to the protective plate assembly is greatly attenuated, thereby effectively weakening the high-energy blasting load and reducing the overall damage risk.

[0018] Compared with the prior art, this utility model provides a high-energy, low-damage blasting protection device for large-section tunnels, which has the following beneficial effects: 1. This high-energy, low-damage blasting protection device for large-section tunnels, through the design of the protective plate components, enables the rapid splicing of protective plate one, protective plate two, and protective plate three. During use or assembly, it facilitates quick disassembly and assembly, improving assembly efficiency. At the same time, after splicing, it is not easy to loosen and has high stability. Through the cooperation of the tie rod and the slot, it ensures that the limit block is always in the state of being disengaged from the limit slot, which facilitates the rapid disassembly of protective plate one, protective plate two, and protective plate three, making it highly practical. Through the guide block, guide slot, bolt, threaded hole two, and threaded hole one, the protective plate components can be quickly installed. After long-term use, it is easy to inspect or replace it. 2. This high-energy, low-damage blasting protection device for large-section tunnels utilizes a support frame design. The triangular shape provides stability, enhancing the support frame's load-bearing capacity and preventing support failure due to bending deformation. The device exhibits high stability. Furthermore, the buffer assembly design ensures that the blasting impact acts on the buffer plate, which in turn pushes the connecting rod to compress the spring. The spring absorbs a significant amount of impact energy through deformation, greatly attenuating the energy transmitted to the protection plate assembly. This effectively weakens the high-energy blasting load and reduces the overall damage risk. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of the protective plate assembly of this utility model; Figure 4 This is a half-sectional view of the fixing base one and fixing base two of this utility model; Figure 5 This is a schematic diagram of the installation structure of the protective plate assembly of this utility model; Figure 6 This is a schematic diagram of the installation structure of the buffer plate of this utility model; Figure 7 This utility model Figure 6 Enlarged structural diagram at point A in the middle; Figure 8 This is a schematic diagram of the installation structure of the buffer component of this utility model.

[0020] The components include: 1. Fixed frame; 2. Protective plate assembly; 201. Protective plate one; 202. Protective plate two; 203. Protective plate three; 204. Positioning groove one; 205. Positioning block two; 206. Positioning block one; 207. Positioning groove two; 208. Fixed seat one; 209. Fixed seat two; 210. Slide rod one; 211. Slide rod two; 212. Moving plate; 213. Spring two; 214. Moving sleeve; 215. Spring three; 216. Pull rod; 217. Rotating plate; 218. Slot; 219. Limiting block; 220. Limiting groove; 3. Guide block; 4. Threaded hole one; 5. Guide groove; 6. Threaded hole two; 7. Bolt; 8. Support frame; 9. Buffer plate; 10. Buffer assembly; 1001. Mounting seat; 1002. Connecting rod; 1003. Movable groove; 1004. Spring one. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example 1: As Figure 1 - Figure 8 As shown, the present invention provides a high-energy, low-damage blasting protection device for large-section tunnels, comprising a fixed frame 1, a protective plate assembly 2, and a buffer plate 9. A guide block 3 is fixedly installed on the outer wall of the protective plate assembly 2, and a threaded hole 4 is opened on the outer wall of the guide block 3. A guide groove 5 and a threaded hole 6 are opened on the outer wall of the fixed frame 1. A bolt 7 is threadedly connected to the outer wall of the fixed frame 1. A support frame 8 is fixedly installed on the side of the protective plate assembly 2 away from the buffer plate 9. A buffer assembly 10 is provided between the protective plate assembly 2 and the buffer plate 9.

[0023] Specifically, the protective plate assembly 2 includes a first protective plate 201, a second protective plate 202, and a third protective plate 203. A positioning groove 204 is provided at the end of the second protective plate 202 near the first protective plate 201, and at the end of the third protective plate 203 near the first protective plate 201. A positioning block 205 is fixedly installed on the inner wall of the positioning groove 204. A positioning block 206 and a fixing seat 208 are fixedly installed at the end of the first protective plate 201 near the second protective plate 202 and at the end of the second protective plate 202 near the third protective plate 203. A positioning groove 207 is provided on the outer wall of the positioning block 206. A fixing seat 209 is fixedly installed at the end of the second protective plate 202 near the first protective plate 201 and at the end of the third protective plate 203 near the first protective plate 201. The inner wall of the fixed seat 208 is fixedly installed with slide rod 210 and slide rod 211. The outer wall of slide rod 210 is slidably connected with a moving plate 212. The outer wall of the moving plate 212 is fixedly installed with spring 213. The outer wall of slide rod 211 is slidably connected with a moving sleeve 214. The outer wall of the moving sleeve 214 is fixedly installed with spring 3 215 and pull rod 216. The outer wall of the fixed seat 208 is rotatably installed with a rotating plate 217. The outer wall of the rotating plate 217 has a slot 218. The end of the moving plate 212 away from the moving sleeve 214 is fixedly installed with a limit block 219. The inner wall of the fixed seat 209 has a limit groove 220. The positioning block 206 and the positioning groove 204 are plugged in. The positioning block 205 and the positioning groove 207 are plugged in. The advantage is that when the staff inserts positioning block 1 206 into the inside of positioning slot 1 204 and positioning block 2 205 into the inside of positioning slot 2 207, the protective plate 1 201, protective plate 2 202 and protective plate 3 203 can be quickly positioned.

[0024] Specifically, the limiting block 219 is adapted to the limiting groove 220, the second spring 213 is located outside the first slide rod 210, and the third spring 215 is located outside the second slide rod 211. The advantage is that during the rapid positioning of the first protective plate 201, the second protective plate 202, and the third protective plate 203, when the limiting block 219 contacts the second fixed base 209, the second spring 213 extends, causing the moving plate 212 to move inward. When the first positioning block 206 is completely submerged in the first positioning groove 204, the second spring 213 rebounds, causing the moving plate 212 to move outward, thereby allowing the limiting block 219 to engage with the limiting groove 220. This enables the rapid splicing of the first protective plate 201, the second protective plate 202, and the third protective plate 203, facilitating quick assembly and disassembly during use or assembly, and improving assembly efficiency.

[0025] Specifically, the pull rod 216 is compatible with the slot 218. The advantage is that when disassembling the first protective plate 201, the second protective plate 202, and the third protective plate 203, the worker pulls the pull rod 216, causing the moving sleeve 214 to move to the left. The moving sleeve 214 presses down on the moving plate 212, causing the moving plate 212 to move inward, disengaging the limiting block 219 from the limiting groove 220. Then, rotating the rotating plate 217 causes the pull rod 216 to engage with the slot 218, ensuring that the limiting block 219 remains disengaged from the limiting groove 220. Finally, the limiting block 219 is pulled out of the fixing seat 209, enabling rapid disassembly of the first protective plate 201, the second protective plate 202, and the third protective plate 203, making it highly practical.

[0026] Example 2: Figure 2 - Figure 8 As shown, this is an improvement on the previous embodiment.

[0027] Specifically, the guide block 3 and the guide groove 5 are installed by insertion. The bolt 7 extends through the threaded hole 2 6 to the inside of the threaded hole 1 4. The diameters of the threaded hole 2 6 and the threaded hole 1 4 are the same. The advantage is that the operator can quickly install the protective plate assembly 2 by inserting the guide block 3 into the guide groove 5 and then extending the bolt 7 through the threaded hole 2 6 to the inside of the threaded hole 1 4. After long-term use, it is convenient to inspect or replace it.

[0028] Specifically, the cross-section of the support frame 8 is triangular, and three identical support frames 8 are provided, distributed at equal intervals. The advantage is that the triangular design of the support frame 8 improves its load-bearing capacity, prevents support failure due to bending deformation, and ensures high stability.

[0029] Specifically, the buffer assembly 10 includes a mounting base 1001. A connecting rod 1002 is fixedly mounted on one end of the buffer plate 9 near the protective plate assembly 2. A movable groove 1003 is formed on the inner wall of the mounting base 1001, and a spring 1004 is provided on the inner wall of the movable groove 1003. The connecting rod 1002 and the movable groove 1003 are slidably connected. The spring 1004 is located between the connecting rod 1002 and the mounting base 1001. Multiple identical buffer assemblies 10 are provided, and the multiple buffer assemblies 10 are distributed at equal intervals. The advantage is that during blasting, the blast impact acts on the buffer plate 9, and the buffer plate 9 pushes the connecting rod 1002 to compress the spring 1004. The spring 1004 absorbs a large amount of impact energy through deformation, which greatly attenuates the energy transmitted to the protective plate assembly 2, effectively weakening the high-energy blast load and reducing the overall damage risk.

[0030] Working principle: During installation, the operator inserts positioning block 206 into positioning groove 204 and positioning block 205 into positioning groove 207, enabling rapid positioning of protective plates 201, 202, and 203. During this rapid positioning process, when limit block 219 contacts fixed base 209, spring 213 extends, causing moving plate 212 to move inward. When positioning block 206 is fully submerged in positioning groove 204, the spring... Spring 213 rebounds, causing the movable plate 212 to move outward, thereby causing the limiting block 219 to engage with the limiting groove 220. This allows for the rapid assembly of protective plates 1 201, 202, and 3 203, facilitating quick disassembly and assembly during use or assembly and improving assembly efficiency. When disassembling protective plates 1 201, 202, and 3 203, the operator pulls the lever 216, causing the movable sleeve 214 to move to the left. The movable sleeve 214 presses down on the movable plate 212, causing the movable plate 212 to move inward, thus engaging the limiting block 219. 19 disengages from the limiting groove 220, then rotates the rotating plate 217, causing the pull rod 216 to engage with the slot 218, ensuring that the limiting block 219 remains disengaged from the limiting groove 220. The limiting block 219 is then pulled out of the fixing seat 209, allowing for quick disassembly of the protective plates 1 201, 2 202, and 3 203, demonstrating high practicality. Subsequently, the operator inserts the guide block 3 into the guide groove 5, and then extends the bolt 7 through the threaded hole 2 6 to the threaded hole 4, enabling quick installation of the protective plate assembly 2. After use, it is easy to inspect or replace. During use, the design of the support frame 8, due to the stability of the triangle, improves the load-bearing capacity of the support frame 8 and avoids support failure caused by bending deformation. It has high stability. Through the design of the buffer component 10, during the explosion, the blast impact acts on the buffer plate 9. The buffer plate 9 pushes the connecting rod 1002 to compress the spring 1004. The spring 1004 absorbs a large amount of impact energy through deformation, which greatly attenuates the energy transmitted to the protective plate component 2, effectively weakening the high-energy blast load and reducing the overall damage risk.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-energy, low-damage blasting protection device for large-section tunnels, comprising a fixing frame (1), a protective plate assembly (2), and a buffer plate (9), characterized in that: The outer wall of the protective plate assembly (2) is fixedly installed with a guide block (3), the outer wall of the guide block (3) is provided with a threaded hole (4), the outer wall of the fixing frame (1) is provided with a guide groove (5) and a threaded hole (6), the outer wall of the fixing frame (1) is threaded with a bolt (7), the side of the protective plate assembly (2) away from the buffer plate (9) is fixedly installed with a support frame (8), and a buffer assembly (10) is provided between the protective plate assembly (2) and the buffer plate (9).

2. The high-energy, low-damage blasting protection device for large-section tunnels according to claim 1, characterized in that: The protective plate assembly (2) includes a first protective plate (201), a second protective plate (202), and a third protective plate (203). The second protective plate (202) near the first protective plate (201) and the third protective plate (203) near the first protective plate (201) are both provided with positioning grooves (204). Positioning blocks (205) are fixedly installed on the inner wall of the positioning grooves (204). The first protective plate (201) near the second protective plate (202) is positioned... One end of the first protective plate (201) and the other end of the second protective plate (202) near the third protective plate (203) are both fixedly installed with a positioning block (206) and a fixing seat (208). The outer wall of the positioning block (206) is provided with a positioning groove (207). The other end of the second protective plate (202) near the first protective plate (201) and the other end of the third protective plate (203) near the first protective plate (201) are both fixedly installed with a fixing seat (209). 8) The inner wall is fixedly installed with slide rod one (210) and slide rod two (211). The outer wall of slide rod one (210) is slidably connected with a moving plate (212). The outer wall of the moving plate (212) is fixedly installed with spring two (213). The outer wall of slide rod two (211) is slidably connected with a moving sleeve (214). The outer wall of the moving sleeve (214) is fixedly installed with spring three (215) and a pull rod (216). The fixed seat one (208) A rotating plate (217) is rotatably mounted on the outer wall of the rotating plate (217). A slot (218) is opened on the outer wall of the rotating plate (217). A limiting block (219) is fixedly installed at the end of the moving plate (212) away from the moving sleeve (214). A limiting groove (220) is opened on the inner wall of the fixed seat (209). The positioning block (206) and the positioning groove (204) are plugged in. The positioning block (205) and the positioning groove (207) are plugged in.

3. The high-energy, low-damage blasting protection device for large-section tunnels according to claim 2, characterized in that: The limiting block (219) is adapted to the limiting groove (220), the second spring (213) is located outside the first slide bar (210), and the third spring (215) is located outside the second slide bar (211).

4. The high-energy, low-damage blasting protection device for large-section tunnels according to claim 2, characterized in that: The pull rod (216) is adapted to the slot (218).

5. The high-energy, low-damage blasting protection device for large-section tunnels according to claim 1, characterized in that: The guide block (3) and the guide groove (5) are installed by plugging in. The bolt (7) extends through the threaded hole two (6) to the inside of the threaded hole one (4). The threaded hole two (6) and the threaded hole one (4) have the same diameter.

6. The high-energy, low-damage blasting protection device for large-section tunnels according to claim 1, characterized in that: The cross-section of the support frame (8) is triangular, and three identical support frames (8) are provided, which are distributed at equal intervals.

7. The high-energy, low-damage blasting protection device for large-section tunnels according to claim 1, characterized in that: The buffer assembly (10) includes a mounting base (1001). A connecting rod (1002) is fixedly installed on one end of the buffer plate (9) near the protective plate assembly (2). The inner wall of the mounting base (1001) is provided with a movable groove (1003). A spring (1004) is provided on the inner wall of the movable groove (1003). The connecting rod (1002) and the movable groove (1003) are slidably connected. The spring (1004) is located between the connecting rod (1002) and the mounting base (1001). Multiple identical buffer assemblies (10) are provided, and the multiple buffer assemblies (10) are distributed at equal intervals.

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