Explosion-proof overpressure exhaust valve for civil air defense engineering

Abstract

The utility model relates to the technical field of civil air defense engineering equipment, in particular to an anti-explosion overpressure exhaust valve for civil air defense engineering, which comprises a valve main body and an anti-impact mechanism arranged at the bottom of the valve main body, and the anti-impact mechanism comprises a base, a telescopic pipe, a connecting rod, a sliding block, a first buffer piece and a second buffer piece; a plurality of radially distributed mounting grooves are formed in the periphery of the base; the telescopic pipe is arranged in the middle of the base and connected with the valve body. First buffer pieces are arranged at the two ends in the mounting groove respectively, a second buffer piece is arranged in the middle in the mounting groove, and sliding blocks are arranged between the two ends of the second buffer piece and the two first buffer pieces respectively; the two sliding blocks are rotationally connected with connecting rods correspondingly, and the ends, away from the sliding blocks, of the connecting rods are rotationally connected to the valve body. The impact resistance of the interior and exterior of the civil air defense project can be improved at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to a people's air defense engineering equipment technical field, concretely relates to a kind of explosion-proof overpressure exhaust valve for people's air defense engineering. BACKGROUND

[0002] The explosion-proof overpressure exhaust valve is a special valve designed to protect systems and equipment in high-risk environments such as explosions. This valve not only needs to effectively exhaust under high pressure conditions, but also needs to withstand and respond to external explosion shock waves to ensure the safety and reliability of the system.

[0003] Patent No. CN201921678352.7 discloses an overpressure exhaust valve, which can move the slider inward by the pull rod and hinge, push the second buffer inward to deform, effectively resist the impact of high-pressure gas inside the people's air defense engineering chamber on the valve body, and solve the problem of low impact resistance of the original overpressure exhaust valve. However, since the slider outside does not have a corresponding second buffer, the overpressure exhaust valve cannot improve the external impact resistance.

[0004] Therefore, the utility model provides an explosion-proof overpressure exhaust valve that can improve the resistance to internal and external impacts of people's air defense engineering, ensuring reliable operation in explosive environments and high-risk working conditions. UTILITY MODEL CONTENT

[0005] Therefore, the utility model provides an explosion-proof overpressure exhaust valve for people's air defense engineering to solve the problem of low external impact resistance.

[0006] To achieve the above purpose, the utility model provides the following technical scheme:

[0007] An explosion-proof overpressure exhaust valve for people's air defense engineering includes a valve body and an anti-impact mechanism at the bottom of the valve body. The anti-impact mechanism includes a base, an extension tube, a connecting rod, a slider, a first buffer, and a second buffer. The base has multiple radially distributed installation slots. The extension tube is connected to the valve body in the middle of the base. The first buffer is installed at both ends of the installation slot, and the second buffer is installed in the middle of the installation slot. The slider is installed between the two first buffers. The connecting rod is connected to the slider, and the valve body is connected to the end of the connecting rod.

[0008] As a further scheme of the utility model: wherein, the distance between the two connecting rods and the rotating connection of the valve body is less than the length of the second buffer; the energy absorption efficiency of the first buffer is greater than the second buffer.

[0009] As a further scheme of the utility model: wherein, the first buffer is a compression spring; the second buffer is a rubber strip.

[0010] As a further scheme of the utility model: wherein, the distance between the two connecting rods and the rotating connection of the valve body is greater than the length of the second buffer; the energy absorption efficiency of the first buffer is less than the second buffer.

[0011] As a further scheme of the utility model: wherein, the first buffer is a foam plastic; the second buffer is a hydraulic damper.

[0012] As a further scheme of the utility model: wherein, the mounting groove is inverted T-shaped, the sliding block, the first buffer and the second buffer are arranged in the horizontal groove of the mounting groove, and the connecting rod is arranged in the vertical groove of the mounting groove.

[0013] Due to the adoption of the above technical scheme, the utility model has the following beneficial effects:

[0014] The explosion-proof overpressure exhaust valve for civil air defense engineering provided by the utility model can make the valve body produce upward and downward displacement when subjected to internal and external impact and vibration, drive two sliding blocks to slide inward or outward through connecting rods, and then extrude the first buffer or the second buffer through the two sliding blocks, so that the valve body can be slowed down in upward and downward directions under the internal and external impact.

[0015] Compared with the prior art which can only slow down the internal impact, the utility model can improve the anti-impact performance of the civil air defense engineering inside and outside at the same time, and is safer. DRAWINGS

[0016] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0017] Figure 1 The structural schematic view of the explosion-proof overpressure exhaust valve for civil air defense engineering according to an embodiment of the utility model;

[0018] Figure 2 For Figure 1 The perspective view of the base in the hidden state of the telescopic pipe according to the embodiment;

[0019] Figure 3 For Figure 1 The partial sectional view of the explosion-proof overpressure exhaust valve for civil air defense engineering according to the embodiment;

[0020] Figure 4 The partial sectional view of the explosion-proof overpressure exhaust valve for civil air defense engineering according to another embodiment of the utility model.

[0021] The correspondence between the reference signs in the drawings and the component names is as follows:

[0022] 1, valve body; 2, impact protection mechanism; 21, first buffer; 22, second buffer; 23, base; 231, mounting groove; 24, telescopic pipe; 241, sealing gasket; 25, connecting rod; 26, sliding block; 3, valve stem; 4, buckle. DETAILED DESCRIPTION

[0023] In the following, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the utility model. Therefore, the following description is considered to be exemplary in nature rather than limiting.

[0024] Please refer to Figures 1-3 In one embodiment of the explosion-proof overpressure exhaust valve for civil air defense engineering of the utility model, the explosion-proof overpressure exhaust valve for civil air defense engineering comprises a valve body 1, a valve stem 3, a buckle 4 and an impact protection mechanism 2, the valve stem 3 is installed at the top of the valve body 1, the buckle 4 is installed on one side of the valve stem 3, and the impact protection mechanism 2 is arranged at the bottom of the valve body 1; the above belongs to the conventional design of the existing overpressure exhaust valve.

[0025] Importantly, the above-mentioned anti-impact mechanism 2 comprises a base 23, an expansion pipe 24, a connecting rod 25, a sliding block 26, a first buffer 21 and a second buffer 22; wherein the base 23 can be connected to the civil air defense room by bolts, so that the pipe hole thereof is communicated with the inside of the civil air defense room, a plurality of mounting grooves 231 are formed on the outer periphery of the base 23, a pipe hole is formed in the middle of the base 23, and the plurality of mounting grooves 231 are distributed radially with the center of the pipe hole as the center; the expansion pipe 24 is arranged in the middle of the base 23, and the two ends thereof are connected to the valve body 1 and the pipe hole respectively, so that the expansion pipe 24 can expand and contract due to the vibration of the valve body 1; the first buffer 21 is arranged at the two ends in the mounting groove 231 respectively, the second buffer 22 is arranged in the middle of the mounting groove 231, and the sliding block 26 is arranged between the two ends of the second buffer 22 and the two first buffers 21 respectively; the connecting rod 25 is rotatably connected to the two sliding blocks 26 respectively, and one end of the connecting rod 25 away from the sliding block 26 is rotatably connected to the valve body 1; when the valve body 1 is impacted and vibrated, the two sliding blocks 26 can be driven to slide inwards or outwards by the connecting rod 25, so as to press the first buffer 21 or the second buffer 22.

[0026] Specifically, the annular side surface of the expansion pipe 24 is provided with a pleated layer, and nylon reinforcing filaments are arranged in the expansion pipe 24, so that the valve body 1 is flexibly connected to the base 23 through the expansion pipe 24; the annular side surface of the expansion pipe 24 is in close contact with the inner wall of the pipe hole of the base 23, and a sealing gasket 241 made of rubber material is fixedly bonded to the outer periphery of the pipe hole at the lower end surface of the base 23, and the upper side of the sealing gasket 241 is seamlessly connected to the lower side of the expansion pipe 24, so as to seal and connect the base 23 and the civil air defense room.

[0027] Specifically, the mounting groove 231 is in the shape of an inverted T, and the sliding block 26, the first buffer 21 and the second buffer 22 are arranged in the horizontal groove of the mounting groove 231, and the connecting rod 25 is arranged in the vertical groove of the mounting groove 231, so that the sliding block 26, the first buffer 21 and the second buffer 22 can be effectively prevented from being separated from the mounting groove 231.

[0028] In the embodiment, the distance between the two connecting rods 25 and the rotating connection of the valve body 1 is less than the length of the second buffer 22, that is, the two connecting rods 25 are in a spreader shape. When the valve body 1 is subjected to external impact and generates downward displacement, the valve body 1 drives the two sliding blocks 26 to slide outward to extrude the first buffer 21 through the connecting rod 25. As is known, external impact usually comes from environmental factors such as explosion, mechanical vibration, wind pressure, etc., among which the explosion shock wave belongs to instantaneous high pressure and is the most destructive external impact. Internal impact mainly comes from pressure fluctuation, fluid impact or sudden pressure release inside the system, and the pressure fluctuation is usually within the design range, so the strength of the explosion shock wave is usually much higher than that of the pressure fluctuation inside the system. Based on this, the energy absorption efficiency of the first buffer 21 is set to be greater than that of the second buffer 22, and the first buffer 21 with better buffer performance can effectively absorb and disperse the high-intensity impact outside the civil air defense engineering, and the second buffer 22 for internal impact can meet the lightweight design or economic demand.

[0029] Specifically, the first buffer 21 can be set as a compression spring, and the second buffer 22 can be set as a rubber strip. The energy absorption efficiency of the compression spring is higher than that of the rubber strip, which can quickly absorb and release energy and is suitable for high-efficiency energy absorption of external explosion impact. The rubber strip can also use the elastic deformation of the rubber material to absorb energy, although the energy absorption efficiency is slightly lower, but it can still effectively absorb the impact energy of internal pressure fluctuation, and the cost is relatively low. Of course, the first buffer 21 and the second buffer 22 of the above embodiment can also use other existing buffer structures, as long as the buffer performance demand and cost control can be met in principle.

[0030] In use, when the internal impact of the civil air defense engineering chamber causes the valve body 1 to generate upward displacement, the valve body 1 can drive the connecting rod 25 to rotate, so that the length of the projection of the connecting rod 25 on the horizontal plane is reduced, thereby driving the two sliding blocks 26 to slide inward to extrude the second buffer 22, and effectively absorbing and dispersing the vibration energy of the valve body 1 through the second buffer 22; when the external impact of the civil air defense engineering chamber causes the valve body 1 to generate downward displacement, the valve body 1 can drive the connecting rod 25 to rotate, so that the length of the projection of the connecting rod 25 on the horizontal plane is increased, thereby driving the two sliding blocks 26 to slide outward to extrude the first buffer 21, and effectively absorbing and dispersing the vibration energy of the valve body 1 through the first buffer 21; when the external impact of the civil air defense engineering chamber causes the valve body 1 to generate displacement to the four directions, the valve body 1 can drive the two sliding blocks 26 to slide in the same direction to extrude the first buffer 21 and the second buffer 22 through the connecting rod 25, and cooperate with the multiple radially distributed mounting grooves 231, so that multiple groups of the first buffer 21 and the second buffer 22 can effectively absorb and disperse the vibration energy of the valve body 1 in all directions around the valve body 1.

[0031] Please refer to Figure 4In another embodiment of the explosion-proof overpressure exhaust valve for civil air defense engineering of the utility model, the distance between the two connecting rods 25 of the explosion-proof overpressure exhaust valve for civil air defense engineering and the rotating connection of the valve body 1 is greater than the length of the second buffer 22, that is, the two connecting rods 25 are in an inverted V shape, when the valve body 1 receives external impact and generates downward displacement, the valve body 1 drives the two sliding blocks 26 to slide inward and extrude the second buffer 22 through the connecting rod 25; based on this, the energy absorption efficiency of the first buffer 21 is set to be less than that of the second buffer 22, and the second buffer 22 with better buffering performance can effectively absorb and disperse the high-intensity impact outside the civil air defense engineering, and the first buffer 21 for internal impact can meet the lightweight design or economic demand. In use, the difference between this embodiment and the above-mentioned embodiment is that the valve body 1 is displaced upward to drive the two sliding blocks 26 to slide outward and extrude the first buffer 21 through the connecting rod 25, and the valve body 1 is displaced downward to drive the two sliding blocks 26 to slide inward and extrude the second buffer 22 through the connecting rod 25.

[0032] Specifically, the first buffer 21 can be set as foamed plastic; the second buffer 22 is set as a hydraulic damper, which absorbs impact energy by using the incompressibility of liquid, and the liquid absorbs the energy of external impact under high pressure and releases pressure through the damper, which is suitable for high-efficiency energy absorption of external explosion impact; foamed plastic absorbs impact energy by compression of foamed plastic material, which is suitable for moderate-intensity impact absorption of internal pressure fluctuation, and has light weight and relatively low manufacturing cost. Of course, the first buffer 21 and the second buffer 22 of the above-mentioned embodiment can also adopt other existing buffer structures, as long as the buffering performance requirement and cost control can be met in principle.

[0033] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. An explosion-proof overpressure exhaust valve for civil air defense projects, comprising a valve body (1) and an anti-impact mechanism (2) arranged at the bottom of the valve body (1), characterized in that, The anti-impact mechanism (2) comprises a base (23), a telescopic pipe (24), a connecting rod (25), a sliding block (26), a first buffer (21) and a second buffer (22); a plurality of mounting grooves (231) radially distributed are formed in the outer periphery of the base (23); the telescopic pipe (24) is arranged in the middle of the base (23) and is connected with the valve body (1); the first buffer (21) is arranged at both ends of the mounting groove (231), the second buffer (22) is arranged in the middle of the mounting groove (231), and the sliding block (26) is arranged between both ends of the second buffer (22) and the two first buffers (21); the connecting rod (25) is rotatably connected to the sliding block (26), and one end of the connecting rod (25) away from the sliding block (26) is rotatably connected to the valve body (1).

2. The explosion-proof overpressure exhaust valve for civil defense projects according to claim 1, characterized in that, The distance between the two connecting rods (25) and the valve body (1) is less than the length of the second buffer (22); the energy absorption efficiency of the first buffer (21) is greater than that of the second buffer (22).

3. The explosion-proof overpressure exhaust valve for civil defense projects according to claim 2, characterized in that, The first buffer (21) is a compression spring; and the second buffer (22) is a rubber strip.

4. The explosion-proof overpressure exhaust valve for civil defense projects according to claim 1, characterized in that, The distance between the two connecting rods (25) and the valve body (1) is greater than the length of the second buffer (22); and the energy absorption efficiency of the first buffer (21) is less than that of the second buffer (22).

5. The explosion-proof overpressure exhaust valve for civil defense projects according to claim 4, characterized in that, The first buffer (21) is a foam plastic; and the second buffer (22) is a hydraulic damper.

6. The explosion-proof overpressure exhaust valve for civil defense projects according to claim 1, characterized in that, The mounting groove (231) is in the shape of an inverted T, the sliding block (26), the first buffer (21) and the second buffer (22) are arranged in the horizontal groove of the mounting groove (231), and the connecting rod (25) is arranged in the vertical groove of the mounting groove (231).

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