Tunnel blasting protection device

Abstract

The utility model relates to the technical field of blasting safety, and aims to provide a tunnel blasting protection device which comprises a vertical frame, a flexible protection net and a driving assembly, the vertical frame comprises a rotating shaft connected with the top of the flexible protection net, the driving assembly drives the rotating shaft to rotate, and the bottom of the flexible protection net is connected with a gravity kettle. The gravity kettle comprises a kettle body and a water injection opening formed in the upper end of the kettle body, and the water injection opening is used for injecting water into the kettle body. In the blasting process, due to the fact that the gravity kettle is arranged at the bottom of the flexible protective net, the gravity center of the flexible protective net is effectively increased, the stability of the flexible protective net is improved, and therefore when the flexible protective net is impacted by flying rocks, the flexible protective net cannot be disengaged from being attached to a tunnel portal to generate a gap; and therefore, the effect of preventing the flying stones from flying out of the gap to damage machinery and personnel outside the hole is achieved, and the protection effect of the protection device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blasting safety, in particular to the field of tunnel blasting protection equipment design. Background Art

[0002] Tunnel engineering is a key project in the construction of infrastructure such as roads and railways. The commonly used excavation technologies include drilling and blasting, shield method and tunnel boring machine method. Among them, the drilling and blasting method is a construction technology that realizes tunnel excavation by drilling, charging and blasting. It has strong geological adaptability and is especially suitable for the construction of hard rock tunnels, broken rock tunnels and a large number of short tunnels. It also has a low excavation cost, so it is widely used in tunnel engineering. In the blasting construction of the drilling and blasting method, the energy and gas compression generated by the blasting usually cause the broken rock to fly out of the cave, causing damage to people and machinery outside the cave, posing a major safety hazard. To solve this problem, before the blasting construction, construction workers usually set up special protective devices at the tunnel entrance to avoid damage to people and machinery outside the cave.

[0003] For example, a tunnel blasting protection device disclosed in a Chinese patent document with authorization announcement number CN219956319U includes a first mounting rod, a second mounting rod, a rotating shaft and a driving assembly for driving the rotating shaft to rotate. The two ends of the rotating shaft are rotatably connected to the top ends of the first mounting rod and the second mounting rod respectively. A flexible rubber net is wound on the rotating shaft. The driving assembly is used to release and reel in the flexible rubber net, thereby shielding or exposing the tunnel opening to prevent flying rocks during blasting and facilitate slag removal operations after blasting. The operation is simple and construction efficiency is effectively improved.

[0004] However, the above technical solution has certain technical defects. Since the flexible rubber net is only fixedly connected to the rotating shaft through the top, during the blasting operation, a large number of flying stones will impact the flexible rubber net, reducing its fit with the tunnel opening, and thus causing a large gap between the flexible rubber net and the tunnel opening. The flying stones generated by the blasting will escape from this gap, causing damage to machinery and personnel outside the tunnel, thereby reducing the protective effect of the blasting device. Summary of the invention

[0005] The purpose of the utility model is to provide a tunnel blasting protection device, which can effectively eliminate the gap between the flexible rubber net and the tunnel opening during the blasting operation, thereby improving the blasting protection effect and has both practicality and convenience.

[0006] The utility model is realized by the following technical solutions:

[0007] A tunnel blasting protection device comprises a stand, a flexible rubber net and a driving assembly, wherein the stand comprises a rotating shaft connected to the top of the flexible rubber net, the driving assembly drives the rotating shaft to rotate, the bottom of the flexible rubber net is connected to a gravity pot, the gravity pot comprises a pot body and a water injection port arranged at the upper end of the pot body, and the water injection port is used to inject water into the pot body.

[0008] The stand is the main frame of the entire protective device, which fits tightly with the tunnel entrance and is fixedly connected to the flexible rubber net through the rotating shaft to support the flexible rubber net. The driving assembly is used to drive the rotating shaft to rotate. The rotation of the rotating shaft will drive the flexible rubber net to wind or stretch, thereby realizing the lifting and lowering of the flexible rubber net, so that construction personnel can enter the tunnel to work during non-blasting periods. The gravity pot is made of materials such as polypropylene and polycarbonate. Water is injected into the pot body through the water injection port provided at its upper end to increase its weight.

[0009] During use, when the flexible rubber net is in a stretched state, the construction personnel firmly connect the gravity pot to the bottom of the flexible rubber net, and after the connection is completed, water is injected into the pot body through the water injection port. During the blasting process, since the gravity pot is provided at the bottom of the flexible rubber net, the center of gravity of the flexible rubber net is effectively increased, thereby improving its stability. Therefore, when impacted by flying stones, the flexible rubber net will not break away from the fit with the tunnel entrance and produce a gap, thereby preventing the flying stones from flying out of the gap and causing damage to the machinery and personnel outside the tunnel, thereby improving the protective effect of the protective device. At the same time, since the weight of the gravity pot is achieved by injecting water into the pot body, the water injection degree of the gravity pot can be flexibly adjusted according to the specific scenario. For example, in order to save manpower during installation and transportation, the gravity pot can be adjusted to a non-water-injected state, so it has certain practicality and convenience.

[0010] As a preferred embodiment of the utility model, a mounting sleeve for inserting the gravity pot is provided at the bottom of the flexible rubber net, and a through hole corresponding to the water injection port is provided at the upper end of the mounting sleeve.

[0011] Thus, the gravity pot is connected to the flexible rubber net by being inserted into the installation sleeve. When in use, the construction personnel first insert the gravity pot without water into the installation sleeve, align the water injection port with the through hole, and then inject water into the pot body through the water injection port to increase the weight of the gravity pot. During the blasting process, the installation sleeve can effectively cover the gravity pot, thereby enhancing the impact resistance of the gravity pot to a certain extent and preventing it from being damaged by flying rocks.

[0012] As a preferred embodiment of the present invention, the gravity kettle comprises a water injection funnel, and the water injection funnel is detachably connected to the water injection port.

[0013] When in use, the construction personnel need to first install the water injection funnel on the water injection port and ensure that the water injection funnel is connected to the space inside the pot. Afterwards, the construction personnel can inject water into the pot body through the water injection funnel. The water injection funnel increases the water injection speed by increasing the water injection diameter of the gravity pot, thereby improving the construction efficiency. At the same time, the water injection funnel is connected to the water injection port in a detachable manner such as threading and clamping, which facilitates the connection between the gravity pot and the mounting sleeve.

[0014] As a preferred embodiment of the present invention, a plurality of anti-slip convex strips are provided on the outer side of the kettle body.

[0015] The anti-slip convex strip effectively improves the friction coefficient between the gravity pot and the mounting sleeve by increasing the roughness of the outer surface of the pot body, thereby enhancing the friction between the two, thereby preventing the gravity pot from falling off the mounting sleeve, and then being able to effectively resist the impact of shock waves or flying stones, ensuring the overall protective effect of the protective device.

[0016] As a preferred embodiment of the present invention, one end of the kettle body is connected to a handle, and the handle is integrally formed with the kettle body.

[0017] Thus, construction workers can use the handle to carry and install the gravity kettle, thereby improving the convenience of the operation. At the same time, the handle and the kettle body are designed as one body, avoiding the problem of looseness that may occur at the connection between the handle and the kettle body, thereby improving the durability of the gravity kettle.

[0018] As a preferred embodiment of the present invention, the other end of the kettle body is provided with a slot for snapping into the handle.

[0019] The design of the card slot is intended to improve the transportation efficiency of the gravity kettle. Through the card slot and the handle, a stable connection between multiple gravity kettles can be achieved, thereby reducing the number of times the gravity kettle is carried and improving efficiency. In addition, this design can also significantly reduce the risk of the gravity kettle being lost during transportation, ensuring the safety of the items.

[0020] As a preferred embodiment of the utility model, a moving device is provided at the bottom of the stand, and the moving device includes a pulley and a limiter, and the limiter is used to limit the rotation of the pulley.

[0021] Before the tunnel blasting operation is completed, construction work such as open hole lining needs to be carried out. The fit between the frame and the hole opening may have an adverse effect on the construction. Therefore, in order to ensure the smooth progress of the construction, the position of the frame needs to be adjusted so that it is temporarily away from the fit with the hole opening to avoid unnecessary contact and interference with the tunnel opening. The setting of the moving device enables the frame to move quickly back and forth, effectively improving the construction efficiency. At the same time, the limiter generates friction by pressing the pulley, thereby achieving the purpose of preventing the pulley from rotating, thereby preventing the frame from being displaced during the blasting process and affecting the protective effect of the protective device.

[0022] In summary, the utility model has the following beneficial effects:

[0023] 1. The setting of the gravity pot effectively increases the center of gravity of the flexible rubber net, thereby effectively eliminating the gap between the flexible rubber net and the tunnel entrance during the blasting operation, thereby improving the protective effect of the protective device.

[0024] 2. The installation sleeve can effectively cover the gravity kettle, thereby enhancing the impact resistance of the gravity kettle to a certain extent and preventing it from being damaged by flying stones.

[0025] 3. The water injection funnel increases the water injection diameter of the gravity pot, thereby increasing the water injection speed and thus improving construction efficiency.

[0026] 4. The anti-slip convex strips arranged on the outer side of the gravity pot can effectively prevent the gravity pot from falling off from the installation sleeve, and can effectively resist the impact of shock waves or flying stones, thereby ensuring the overall protective effect of the protective device.

[0027] 5. The setting of the moving device prevents the frame from shifting during the blasting process, while realizing the rapid forward and backward movement of the frame, effectively improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of this embodiment;

[0029] Figure 2 It is the front view of the gravity kettle;

[0030] Figure 3 It is a structural diagram of a gravity kettle.

[0031] In the figure: 1, stand; 11, rotating shaft; 2, flexible rubber net; 21, mounting sleeve; 211 through hole; 3, driving assembly; 4, gravity pot; 41, pot body; 42, water filling port; 43, water filling funnel; 44, anti-slip convex strip; 45, handle; 46, slot; 5, moving device; 51, pulley; 52, limiter. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0033] See also Figure 1 , the frame 1 is the main frame of the entire protective device, which fits tightly with the tunnel opening, is fixedly connected to the flexible rubber net 2 through the rotating shaft 11, and is used to support the flexible rubber net 2. The driving component 3 is used to drive the rotating shaft 11 to rotate. The rotation of the rotating shaft 11 will drive the flexible rubber net 2 to roll or stretch, thereby realizing the lifting and lowering of the flexible rubber net 2, so that construction personnel can enter the tunnel to work during non-blasting periods. A moving device 5 is provided at the bottom of the frame 1. The moving device 5 includes a pulley 51 and a limiter 52, and the limiter 52 is used to limit the rotation of the pulley 51. Before the tunnel blasting operation is completed, construction work such as open hole lining needs to be carried out. The fit of the frame 1 with the opening may have an adverse effect on the construction. Therefore, in order to ensure the smooth progress of the construction, the position of the frame 1 needs to be adjusted to temporarily keep it away from the fit with the opening to avoid unnecessary contact and interference with the tunnel opening. The setting of the moving device 5 realizes the rapid forward and backward movement of the frame 1, effectively improving the construction efficiency. At the same time, the limiter 52 generates friction by pressing the pulley 51, thereby preventing the pulley 51 from rotating, thereby preventing the stand 1 from being displaced during the blasting process and affecting the protective effect of the protective device.

[0034] The bottom of the flexible rubber net 2 is provided with a mounting sleeve 21, and the gravity pot 4 is connected to the bottom of the flexible rubber net 2 by inserting the mounting sleeve 21. The gravity pot 4 is made of materials such as polypropylene and polycarbonate, and includes a pot body 41 and a water injection port 42 arranged at the upper end of the pot body 41, and a through hole 211 corresponding to the water injection port 42 is arranged at the upper end of the mounting sleeve 21. When in use, when the flexible rubber net 2 is in a stretched state, the construction personnel first insert the gravity pot 4 that is not filled with water into the mounting sleeve 21, and align the water injection port 42 with the through hole 211, and then inject water into the pot through the water injection port 42 to increase the weight of the gravity pot 4. During the blasting process, since the gravity pot 4 is provided at the bottom of the flexible rubber net 2, the center of gravity of the flexible rubber net 2 is effectively increased, thereby improving its stability. Therefore, when impacted by flying stones, the flexible rubber net will not break away from the fit with the tunnel opening and produce a gap, thereby achieving the effect of preventing flying stones from flying out of the gap to cause damage to the machinery and personnel outside the tunnel, thereby improving the protective effect of the protective device. Since the weight of the gravity kettle 4 is achieved by injecting water into the kettle body 41, the water injection degree of the gravity kettle 4 can be flexibly adjusted according to the specific scene. For example, in order to save manpower during installation and transportation, the gravity kettle 4 can be adjusted to a non-water injection state, so it has certain practicality and convenience. At the same time, the installation sleeve 21 can effectively cover the gravity kettle 4, thereby enhancing the impact resistance of the gravity kettle 4 to a certain extent, and preventing it from being damaged by flying stone impact.

[0035] See also Figure 2The gravity kettle 4 includes a water injection funnel 43, and the water injection funnel 43 is connected to the water injection port 42 in a detachable manner such as threading and clamping. When in use, the construction personnel need to first install the water injection funnel 43 on the water injection port 42, and ensure that the water injection funnel 43 is interconnected with the space inside the kettle. Subsequently, the construction personnel can inject the required amount of water into the kettle body 41 through the water injection funnel 43. The water injection funnel 43 increases the water injection speed by increasing the water injection diameter of the gravity kettle 4, thereby improving the construction efficiency. At the same time, the water injection funnel 43 is detachably connected to the water injection port 42, which facilitates the connection between the gravity kettle 4 and the mounting sleeve 21.

[0036] See also Figure 2 The outer side of the pot body 41 is provided with a plurality of anti-skid convex strips 44. The anti-skid convex strips 44 effectively increase the friction coefficient between the gravity pot 4 and the mounting sleeve 21 by increasing the roughness of the outer side of the pot body 41, thereby enhancing the friction between the two, and can effectively resist the impact of shock waves or flying stones, prevent the gravity pot 4 from falling off the mounting sleeve 21, and ensure the overall protective effect of the protective device.

[0037] See also Figure 2 , Figure 3 One end of the kettle body 41 of the gravity kettle 4 is connected to a handle 45, and the handle 45 is integrally formed with the kettle body 41, and the other end of the kettle body 41 is provided with a slot 46 for snapping the handle 45. Construction workers can use the handle 45 to carry out operations such as transporting and installing the gravity kettle 4, thereby improving the convenience of the operation. At the same time, the handle 45 and the kettle body 41 are designed as an integral whole, thereby avoiding the problem of looseness that may occur at the connection between the handle 45 and the kettle body 41, thereby improving the durability of the gravity kettle 4. During the transportation of the gravity kettle 4, the stable connection between multiple gravity kettles 4 can be achieved through the snap connection between the slot 46 and the handle 45, thereby reducing the number of times the gravity kettle 4 is carried and improving efficiency. At the same time, it can also significantly reduce the risk of loss of the gravity kettle 4 during transportation and ensure the safety of items.

[0038] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A tunnel blasting protection device, comprising a stand (1), a flexible rubber net (2) and a drive assembly (3), wherein the stand (1) comprises a rotating shaft (11) connected to the top of the flexible rubber net (2), and the drive assembly (3) drives the rotating shaft (11) to rotate, characterized in that: The bottom of the flexible rubber net (2) is connected to a gravity pot (4), and the gravity pot (4) comprises a pot body (41) and a water injection port (42) arranged at the upper end of the pot body (41), and the water injection port (42) is used to inject water into the pot body (41).

2. A tunnel blasting protection device according to claim 1, characterized in that: The bottom of the flexible rubber net (2) is provided with a mounting sleeve (21) for the gravity pot (4) to be inserted into, and the upper end of the mounting sleeve (21) is provided with a through hole (211) corresponding to the water injection port (42).

3. A tunnel blasting protection device according to claim 2, characterized in that: The gravity kettle (4) comprises a water injection funnel (43), and the water injection funnel (43) is detachably connected to the water injection port (42).

4. A tunnel blasting protection device according to claim 2 or 3, characterized in that: The outer side surface of the pot body (41) is provided with a plurality of anti-slip convex strips (44).

5. A tunnel blasting protection device according to any one of claims 1 to 3, characterized in that: One end of the kettle body (41) is connected to a handle (45), and the handle (45) is integrally formed with the kettle body (41).

6. The tunnel blasting protection device according to claim 5, characterized in that: The other end of the kettle body is provided with a slot (46) for clamping the handle (45).

7. The tunnel blasting protection device according to claim 1, characterized in that: A moving device (5) is provided at the bottom of the stand (1), wherein the moving device (5) comprises a pulley (51) and a stopper (52), wherein the stopper (52) is used to limit the rotation of the pulley (51).

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