Large-air-volume anti-explosion valve capable of slowing down opening

Abstract

The utility model relates to the technical field of anti-explosion valves, in particular to a large-air-volume anti-explosion valve capable of slowing down opening, which comprises a shell, a plurality of valve blades are rotatably connected to the inner side wall of the shell, mounting holes are symmetrically formed in the outer side wall of the shell, rotating shafts are rotatably connected to the inner side walls of the mounting holes, and one ends, located in the shell, of the rotating shafts are fixedly connected with the side walls of the valve blades. Through the arrangement of the driving assembly, the valve blade can be rapidly closed in the closing process, when shock wave energy generated by explosion becomes smaller, the valve blade is opened under the action of the reset assembly, the driving assembly rotates reversely, and in the process of reverse rotation of the driving assembly, the valve blade can be rapidly closed. The sliding block drives the sliding block to move upwards along the inner side wall of the sliding groove, through abutting between the first front inclined face and the telescopic assembly, the rising resistance of the sliding block is increased, then the valve blade is slowly opened, and the technical problem that shock waves with small pressure affect sensitive objects is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof valves, in particular to a large air volume explosion-proof valve which is slow to open. Background Art

[0002] Anti-explosion valves are usually installed on the exterior walls of protected buildings. Under normal circumstances, anti-explosion valves are equivalent to ventilation inlets or outlets. When a destructive explosion shock wave arrives, the anti-explosion valve will automatically adjust or close according to the overpressure, blocking the explosion shock wave from damaging the interior of the building.

[0003] For example, the patent with publication number CN219432467U discloses a large air volume anti-explosion valve with slow opening, including a shell, a valve leaf mechanism, an elastic reset mechanism and a damping slow-opening mechanism. The shell is provided with a ventilation channel, the valve leaf mechanism is used to close the ventilation channel, the valve leaf mechanism includes a flip shaft and a valve leaf, when the flip shaft rotates forward, the valve leaf swings from a closed position to an explosion side to an open position, when the flip shaft rotates reversely, the valve leaf resets from an open position to a closed position, the elastic reset mechanism is used to drive the valve leaf to swing from a closed position to an explosion side to an open position and maintain a normally open state, the damping slow-opening mechanism is used to slow down the swinging of the valve leaf from a closed position to an explosion side to an open position, and when the flip shaft rotates forward, it is subject to a motion resistance applied by the damping slow-opening mechanism.

[0004] Through the above configuration, the utility model described in the prior art can extend the time for the explosion-proof valve to block the shock wave by setting a damping slow-opening mechanism, so that the pressure leakage of the explosion-proof valve can be reduced when an explosion occurs. However, the large air volume explosion-proof valve with slow opening in the prior art solution has the following defects during operation:

[0005] The above-mentioned device prolongs the opening speed of the valve leaf, thereby prolonging the time for the explosion-proof valve to block shock waves. However, the arc-shaped tooth portion in the device reverses the one-way damping gear and the one-way damping shaft through the one-way damping gear to achieve the purpose of slowing down the opening speed of the valve leaf, but the one-way damping shaft cannot be reversed, so that the valve leaf of the device cannot open automatically after being closed. Utility Model Content

[0006] The utility model aims to provide a large air volume explosion-proof valve with slow opening, which is mainly used to solve the technical problem in the prior art that the valve leaf cannot open automatically after being closed.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0008] A large air volume explosion-proof valve with slow opening comprises a shell, an inner wall of the shell is rotatably connected to a plurality of valve leaves, an outer wall of the shell is symmetrically provided with mounting holes, the inner wall of the mounting hole is rotatably connected to a rotating shaft, one end of the rotating shaft located inside the shell is fixedly connected to the side wall of the valve leaf, the other end of the rotating shaft is fixedly connected to a driving assembly, a reset assembly is sleeved on the outer wall of the rotating shaft, a sliding groove is provided on the side wall of the shell, a sliding block is slidably connected to the inner wall of the sliding groove, a plurality of connecting blocks are fixedly connected to the side wall of the sliding block, a first positive inclined surface is provided on the upper side wall of the connecting block, a first negative inclined surface is provided on the lower side wall of the connecting block, a fixing plate is fixedly connected to the outer wall of the shell located at the connecting block, and a telescopic assembly is fixedly connected to the side wall of the fixing plate.

[0009] The working principle and beneficial effects of the utility model:

[0010] 1. Working principle: The structure of the large air volume explosion-proof valve with slow opening in the utility model is similar to the existing structure of the large air volume explosion-proof valve with slow opening. For example, the patent with publication number CN219432467U discloses a large air volume explosion-proof valve with slow opening. The main improvement of the utility model is that when the device is in use, the shell is installed on the outer wall of the protective building. When the shock wave generated by the explosion spreads to the device, the shock wave will hit the valve leaf, causing the valve leaf to rotate on the inner wall of the shell. When the valve leaf rotates, the driving assembly is driven to work through the rotating shaft, and then the slider is driven along the slide by the driving assembly. The inner wall of the groove slides downward, and the reset assembly is compressed during this process. When the slider moves downward along the slide groove, it contacts the telescopic assembly through the connecting block. The connecting block can be quickly moved to the bottom of the telescopic assembly through the first negative slope until the valve leaf is completely closed. When the energy of the shock wave generated by the explosion becomes smaller, the valve leaf is opened under the action of the reset assembly, causing the drive assembly to rotate in the opposite direction. During the reverse rotation of the drive assembly, the slider drives the connection to move upward along the inner wall of the slide groove, and the contact between the first positive slope and the telescopic assembly increases the resistance to the slider's rise, thereby causing the valve leaf to slowly open.

[0011] 2. Beneficial effects:

[0012] The prior art solves the technical problem of slowly opening the valve leaf. However, the prior art has the technical problem that the valve leaf cannot open automatically after closing. The present solution sets a driving component so that the valve leaf can close quickly during the closing process. When the energy of the shock wave generated by the explosion becomes smaller, the valve leaf is opened under the action of the reset component, causing the driving component to rotate in the opposite direction. During the reverse rotation of the driving component, the slider drives the connection along the inner wall of the slide groove to move upward, and the resistance to the rise of the slider is increased through the friction between the first positive slope and the telescopic component, thereby causing the valve leaf to open slowly, thereby preventing the shock wave with lower pressure from affecting more sensitive items.

[0013] Preferably: the driving assembly includes a gear fixedly connected to the end of the rotating shaft, and the end of the slider is fixedly connected to a rack, and the rack and multiple gears are meshed with each other. When the shock wave generated by the explosion spreads to the device, the shock wave will hit the valve leaf, causing the valve leaf to rotate on the inner wall of the shell. When the valve leaf rotates, the gear is driven to rotate through the rotating shaft, and then the rack is driven to move downward through the gear. In the process of the rack moving downward, the connecting block is driven by the slider to hit the telescopic assembly, so that in the process of opening the valve leaf, the first positive inclined surface and the telescopic assembly are in conflict, thereby increasing the resistance of the slider to rise, and then the valve leaf is slowly opened.

[0014] Preferably: the reset assembly includes a torsion spring sleeved on the outside of the rotating shaft, one end of the torsion spring is fixedly connected to the gear, and the other end of the torsion spring is fixedly connected to the outer wall of the shell. When the valve leaf is closing, the torsion spring is compressed. When the shock wave is small, the valve leaf automatically opens under the action of the compressed torsion spring.

[0015] Preferably: the telescopic assembly includes a rectangular block fixedly connected to the side wall of the fixed plate, a rectangular groove is opened at the end of the rectangular block, and the inner wall of the rectangular groove is slidably connected to a fixed block, one end of the fixed block located inside the rectangular groove is fixedly connected to a spring, and the other end of the spring is fixedly connected to the inner wall of the rectangular groove. When the slider drives the connecting block to move downward, the first negative inclined surface contacts the fixed block, and as the connecting block moves downward, the fixed block will slide along the inner wall of the rectangular groove, and the spring is compressed during this process. As the connecting block moves downward, when the connecting block is separated from the fixed block, the fixed block is reset under the action of the compression spring. When the shock wave generated by the explosion is small, the valve leaf will open under the action of the compression torsion spring, and the connecting block will move upward. Through the friction between the first positive inclined surface and the fixed block, the resistance to the rise of the slider is increased, thereby causing the valve leaf to slowly open.

[0016] Preferably: the upper side wall of the fixed block is provided with a second negative slope, and the lower side wall of the fixed block is provided with a second positive slope. When the connecting block rises, the friction between the first positive slope and the second positive slope increases the resistance to the rise of the slider, thereby causing the valve leaf to open slowly, thereby preventing the technical problem of shock waves with lower pressure from affecting more sensitive items.

[0017] Preferably: the fixed block is located obliquely below the connecting block, the first positive slope is parallel to the second positive slope, and the first negative slope is parallel to the second negative slope, so that the connecting block can easily contact the fixed block during the up and down movement, allowing the fixed block to slide inside the rectangular groove.

[0018] Preferably: the inclination angles of the first negative slope and the second negative slope are much larger than those of the first positive slope and the second positive slope, so that the resistance of the connecting block is smaller when it moves downward, and the resistance of the connecting block is larger when it moves upward, thereby causing the valve leaf to open slowly, preventing the technical problem of shock waves with lower pressure from affecting more sensitive items. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the slider, the slide groove and the rack of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the rectangular block, spring and fixed block of the utility model;

[0022] Figure 4 It is a structural schematic diagram of the fixing block and the connecting block of the utility model.

[0023] The figure marks in the drawings of the specification include: 1, housing; 2, valve leaf; 3, slide groove; 4, slider; 5, rack; 6, gear; 7, fixed plate; 8, mounting hole; 9, torsion spring; 10, rotating shaft; 11, rectangular block; 12, spring; 13, rectangular groove; 14, connecting block; 15, fixed block; 16, first positive inclined surface; 17, first negative inclined surface; 18, second negative inclined surface; 19, second positive inclined surface. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-4As shown, a shell body 1 is included, and the inner wall of the shell body 1 is rotatably connected to a plurality of valve leaves 2. The outer wall of the shell body 1 is symmetrically provided with mounting holes 8. The inner wall of the mounting hole 8 is rotatably connected to a rotating shaft 10. One end of the rotating shaft 10 located inside the shell body 1 is fixedly connected to the side wall of the valve leaf 2, and the other end of the rotating shaft 10 is fixedly connected to a driving assembly, and the driving assembly includes a gear 6 fixedly connected to the end of the rotating shaft 10, and a rack 5 is fixedly connected to the end of the slider 4, and the rack 5 and the plurality of gears 6 are meshed with each other. When rotating, the gear 6 is driven to rotate by the rotating shaft 10, and then the rack 5 is driven to move downward by the gear 6, so that the rack 5 can drive the slider 4 to slide along the inner wall of the slide groove 3, and the outer wall of the rotating shaft 10 A reset component is sleeved, and the reset component includes a torsion spring 9 sleeved on the outside of the rotating shaft 10, one end of the torsion spring 9 is fixedly connected to the gear 6, and the other end of the torsion spring 9 is fixedly connected to the outer wall of the shell 1. When the gear 6 rotates, the torsion spring 9 is compressed. When the shock wave generated by the explosion is small, the valve leaf 2 will open under the action of the compressed torsion spring 9, thereby achieving the purpose of automatic opening of the valve leaf 2. A slide groove 3 is provided on the side wall of the shell 1, and a slider 4 is slidably connected to the inner wall of the slide groove 3. A plurality of connecting blocks 14 are fixedly connected to the side wall of the slider 4. A first positive inclined surface 16 is provided on the upper side wall of the connecting block 14, and a first negative inclined surface 17 is provided on the lower side wall of the connecting block 14. The shell 1 is located at the connecting block 14. The outer wall of the fixed plate 7 is fixedly connected to the side wall of the fixed plate 7, and the side wall of the fixed plate 7 is fixedly connected to the telescopic component, and the telescopic component includes a rectangular block 11 fixedly connected to the side wall of the fixed plate 7, and a rectangular groove 13 is opened at the end of the rectangular block 11. The inner wall of the rectangular groove 13 is slidably connected with a fixed block 15, and one end of the fixed block 15 located inside the rectangular groove 13 is fixedly connected to a spring 12, and the other end of the spring 12 is fixedly connected to the inner wall of the rectangular groove 13. In the process of the rack 5 moving downward, the connecting block 14 is driven by the slider 4 to reach the fixed block 15, and the first negative inclined surface 17 is in contact with the second negative inclined surface 18. As the connecting block 14 moves downward, the fixed block 15 will move along the rectangular groove 1 3, during which the spring 12 is compressed. As the connecting block 14 moves downward, when the connecting block 14 is separated from the fixing block 15, the fixing block 15 is reset under the action of the compression spring 12, and the connecting block 14 will continue to move downward until the valve leaf 2 is completely closed. When the shock wave generated by the explosion is small, the valve leaf 2 will open under the action of the compression torsion spring 9, and the slider 4 drives the connecting block 14 to move upward along the inner wall of the slide groove 3. Through the conflict between the first positive slope 16 and the second positive slope 19, the resistance of the slider 4 to rise is increased, thereby causing the valve leaf 2 to open slowly, preventing the shock wave with smaller pressure from affecting more sensitive items.

[0026] When the device is in use, the shell 1 is installed on the outer wall of the protective building. When the shock wave generated by the explosion spreads to the device, the shock wave will hit the valve leaf 2, causing the valve leaf 2 to rotate on the inner wall of the shell 1. When the valve leaf 2 rotates, the gear 6 is driven to rotate through the rotating shaft 10. During the rotation of the gear 6, the torsion spring 9 is compressed, and then the rack 5 is driven to move downward through the gear 6. During the downward movement of the rack 5, the connecting block 14 is driven by the slider 4 to hit the fixed block 15, so that the first negative inclined surface 17 and the second negative inclined surface 18 are in contact. As the connecting block 14 moves downward, the fixed block 15 will slide along the inner wall of the rectangular groove 13. During the process, the spring 12 is compressed. As the connecting block 14 moves downward, when the connecting block 14 is separated from the fixed block 15, the fixed block 15 is reset under the action of the compression spring 12, and the connecting block 14 will continue to move downward until the valve leaf 2 is completely closed. When the shock wave generated by the explosion is small, the valve leaf 2 will open under the action of the compression torsion spring 9, and the slider 4 drives the connecting block 14 to move upward along the inner wall of the slide groove 3. Through the friction between the first positive slope 16 and the second positive slope 19, the resistance of the slider 4 to rise is increased, thereby causing the valve leaf 2 to open slowly, thereby preventing the shock wave with lower pressure from affecting more sensitive items.

[0027] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A large air volume explosion-proof valve with slow opening, comprising a housing (1), a plurality of valve leaves (2) being rotatably connected to the inner wall of the housing (1), a mounting hole (8) being symmetrically provided on the outer wall of the housing (1), a rotating shaft (10) being rotatably connected to the inner wall of the mounting hole (8), one end of the rotating shaft (10) being located inside the housing (1) being fixedly connected to the side wall of the valve leaf (2), characterized in that: The other end of the rotating shaft (10) is fixedly connected to a driving component, the outer wall of the rotating shaft (10) is sleeved with a reset component, the side wall of the shell (1) is provided with a sliding groove (3), the inner wall of the sliding groove (3) is slidably connected to a slider (4), the side wall of the slider (4) is fixedly connected to a plurality of connecting blocks (14), the upper side wall of the connecting block (14) is provided with a first positive inclined surface (16), the lower side wall of the connecting block (14) is provided with a first negative inclined surface (17), the outer side wall of the shell (1) located at the connecting block (14) is fixedly connected to a fixing plate (7), and the side wall of the fixing plate (7) is fixedly connected to a telescopic component.

2. A large air volume anti-explosion valve with slow opening according to claim 1, characterized in that: The driving assembly comprises a gear (6) fixedly connected to the end of the rotating shaft (10); a rack (5) is fixedly connected to the end of the slider (4); and the rack (5) and the plurality of gears (6) are meshed with each other.

3. A large air volume anti-explosion valve with slow opening according to claim 2, characterized in that: The reset assembly comprises a torsion spring (9) sleeved on the outside of the rotating shaft (10), one end of the torsion spring (9) is fixedly connected to the gear (6), and the other end of the torsion spring (9) is fixedly connected to the outer wall of the housing (1).

4. The large air volume anti-explosion valve with slow opening according to claim 1, characterized in that: The telescopic assembly comprises a rectangular block (11) fixedly connected to the side wall of the fixed plate (7); a rectangular groove (13) is provided at the end of the rectangular block (11); a fixed block (15) is slidably connected to the inner wall of the rectangular groove (13); one end of the fixed block (15) located inside the rectangular groove (13) is fixedly connected to a spring (12); and the other end of the spring (12) is fixedly connected to the inner wall of the rectangular groove (13).

5. A large air volume anti-explosion valve with slow opening according to claim 4, characterized in that: The upper side wall of the fixing block (15) is provided with a second negative inclined surface (18), and the lower side wall of the fixing block (15) is provided with a second positive inclined surface (19).

6. A large air volume anti-explosion valve with slow opening according to claim 5, characterized in that: The fixing block (15) is located obliquely below the connecting block (14), the first positive inclined surface (16) and the second positive inclined surface (19) are parallel to each other, and the first negative inclined surface (17) and the second negative inclined surface (18) are parallel to each other.

7. A large air volume anti-explosion valve with slow opening according to claim 6, characterized in that: The inclination angles of the first negative inclined surface (17) and the second negative inclined surface (18) are much greater than those of the first positive inclined surface (16) and the second positive inclined surface (19).

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