Explosion-proof overpressure exhaust valve

Abstract

The utility model discloses an explosion-proof overpressure exhaust valve which comprises a shell, a limiting plate is fixedly arranged on one side in the shell, a rotating plate is movably arranged in the shell, at least one communicating hole is formed in the rotating plate, a spring is arranged on one side of the rotating plate, the other end of the spring is fixedly connected with the limiting plate, and the limiting plate is fixedly connected with the rotating plate. A baffle ring is fixedly arranged in the shell and located between the limiting plate and the rotating plate, when the pulling force of the spring on the rotating plate is larger than the pushing force of the air pressure in the project on the rotating plate, the spring pulls the rotating plate to be attached to the baffle ring, and the baffle ring blocks the communicating hole; when the pulling force of the spring to the rotating plate is smaller than the pushing force of the air pressure in the project to the rotating plate, the air pressure in the project pushes the rotating plate to break away from the baffle ring, and air in the project is exhausted through the communicating hole. The valve is high in automation degree, external gas is not prone to entering the civil air defense project, and therefore potential safety hazards in the civil air defense project are prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of overpressure exhaust valves, in particular to an explosion-proof overpressure exhaust valve. Background Technique

[0002] The overpressure exhaust valve is a device used in protective engineering, mainly used to automatically open when the internal pressure of the project exceeds the set value to discharge excess gas or liquid, so as to protect the system from overpressure. It is usually installed at the air outlet of the protective engineering, and has the functions of automatic overpressure exhaust and preventing external gas from entering, playing a role in preventing external chemical toxic gases.

[0003] In the Chinese patent document with the publication number CN208331329U, an explosion-proof overpressure exhaust valve is disclosed, including a bottom plate, an explosion-proof block and fixing screw holes. The explosion-proof block is arranged above the bottom plate, and the bottom of the explosion-proof block is tightly welded to the bottom plate. The fixing screw holes are all arranged through the periphery of the bottom plate. A groove is arranged on the outer side of the explosion-proof block, and the groove is embedded on the outer side of the explosion-proof block. A number of ventilation holes are arranged inside the explosion-proof block, and the ventilation holes all penetrate through the inside of the explosion-proof block. A cover plate is arranged at the upper end of the explosion-proof block, and the cover plate is movably connected to the explosion-proof block. Connecting blocks are fixedly welded around the upper part of the cover plate, and a number of rubber clamping blocks are fixedly arranged below the cover plate. A gear is arranged on one side below the connecting block, and a motor is fixedly arranged below the inside of the connecting block, and the motor is linked with the gear. A storage battery is fixedly arranged in the middle above the cover plate, and the storage battery is electrically connected to the motor. A control button is arranged on one side of the storage battery, and the control button is electrically connected to the storage battery. The motor drives the gear to operate, so that the rubber clamping blocks on the cover plate stretch and contract in the ventilation holes.

[0004] The deficiency of the above disclosed solution is that: since the control button is required to open or close the valve, the degree of automation is low. When the valve is opened, it is easy for external gas to enter the civil air defense project when the staff forgets to close the valve due to negligence, thus bringing potential safety hazards to the inside of the civil air defense project. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to overcome the existing defects, and provide an explosion-proof overpressure exhaust valve, which can automatically control the opening and closing of the valve by comparing the magnitude of the pulling force of the spring on the rotating plate and the pushing force of the air pressure on the rotating plate, and can effectively solve the problems in the background technique.

[0006] To achieve the above object, the present utility model provides the following technical solutions: An explosion-proof overpressure exhaust valve, comprising a housing, a limiting plate is fixedly arranged on one side inside the housing, a rotating plate is movably arranged inside the housing, at least one communication hole is formed in the rotating plate, a spring is arranged on one side of the rotating plate, and the other end of the spring is fixedly connected to the limiting plate. A retaining ring is fixedly arranged inside the housing, and the retaining ring is located between the limiting plate and the rotating plate. When the pulling force of the spring on the rotating plate is greater than the pushing force of the air pressure inside the project on the rotating plate, the spring pulls the rotating plate to fit with the retaining ring, and the retaining ring blocks the communication hole; when the pulling force of the spring on the rotating plate is less than the pushing force of the air pressure inside the project on the rotating plate, the air pressure inside the project pushes the rotating plate away from the retaining ring, so that the gas inside the project is discharged through the communication hole.

[0007] Further, a sliding plate is slidably arranged inside the housing, the sliding plate is rotatably connected to the rotating plate, at least one air outlet is formed in the sliding plate, and the air outlet cooperates with the communication hole to discharge the gas. A driving component for driving the rotating plate to rotate is arranged on the limiting plate.

[0008] Further, the driving component includes a sliding rod, a circular hole is formed in the limiting plate, the sliding rod passes through the circular hole in the limiting plate and is fixedly connected to the rotating plate, a spiral groove is formed on the outer periphery of the sliding rod, a protrusion is fixedly arranged in the circular hole, the spiral groove on the sliding rod is slidably matched with the protrusion in the circular hole, a rotating ring is sleeved on the sliding rod, the rotating ring is rotatably connected to the rotating plate, and the rotating ring is fixedly connected to the spring.

[0009] Further, a baffle is fixedly arranged at one end of the sliding rod away from the rotating plate, and the diameter of the baffle is larger than the aperture of the circular hole on the limiting plate.

[0010] Further, a base is fixedly sleeved on the housing, and a plurality of mounting holes are formed in the base.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] Since a spring is arranged on one side of the rotating plate, the other end of the spring is fixedly connected to the limiting plate, and a retaining ring is fixedly arranged inside the housing, and the retaining ring is located between the limiting plate and the rotating plate. Therefore, when the air pressure inside the project is greater than the set standard air pressure therein, the gas passes through the retaining ring and pushes the rotating plate to move outwards, the rotating plate stretches the spring, so that the rotating plate is separated from the retaining ring, and the gas enters the communication hole from the gap between the retaining ring and the rotating plate, and the gas is discharged through the communication hole; when the air pressure inside the project meets the standard air pressure, the pulling force of the spring drives the rotating plate to fit with the gasket on the retaining ring, thereby blocking the communication hole. This valve has a high degree of automation and is not easy to allow external gas to enter the civil air defense project, thus preventing potential safety hazards inside the civil air defense project. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional schematic diagram of the structure of the present utility model;

[0014] Figure 2 is a schematic cross-sectional view of the structure of the present utility model;

[0015] Figure 3 is a schematic view of the cooperation between the rotating plate and the sliding plate of the structure of the present utility model.

[0016] In the figure: 1, housing; 2, base; 3, mounting hole; 4, chute; 5, limiting plate; 6, sliding plate; 7, slider; 8, rotating plate; 9, air outlet; 10, communication hole; 11, rotating ring; 12, spring; 13, spiral groove; 14, baffle; 15, retaining ring. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0018] Please refer to Figures 1 - 3 , the present utility model provides a technical solution: an explosion-proof overpressure exhaust valve, including a housing 1, the housing 1 is a cylindrical tubular structure, and a base 2 is fixedly sleeved at one end of the housing 1. A plurality of mounting holes 3 are equidistantly arranged along the circumference of the base 2, which is convenient for installing the base 2.

[0019] A limiting plate 5 is fixedly arranged on one side of the housing 1 close to the base 2. A rotating plate 8 is movably arranged in the housing 1. Four communication holes 10 are arranged along the edge of the rotating plate 8, and the four communication holes 10 are arranged in a circumferential array. A retaining ring 15 is fixedly arranged in the housing 1, and the retaining ring 15 is located between the limiting plate 5 and the rotating plate 8. A spring 12 is arranged at the center of one side of the rotating plate 8, and the other end of the spring 12 passes through the retaining ring 15 and is fixedly connected to the limiting plate 5.

[0020] When the pulling force of the spring 12 on the rotating plate 8 is greater than the pushing force of the air pressure in the project on the rotating plate 8, the spring 12 pulls the rotating plate 8 to fit with the retaining ring 15, and the retaining ring 15 blocks the communication hole 10. A rubber pad is fixedly arranged on the side of the retaining ring 15 close to the rotating plate 8, and the rubber pad can increase the sealing effect on the communication hole 10. When the pulling force of the spring 12 on the rotating plate 8 is less than the pushing force of the air pressure in the project on the rotating plate 8, the air pressure in the project pushes the rotating plate 8 away from the retaining ring 15, so that the gas in the project is discharged through the communication hole 10.

[0021] A sliding plate 6 is hermetically and slidably arranged in a housing 1. Chutes 4 are symmetrically formed in the housing 1. Sliders 7 are fixedly arranged on both sides of the sliding plate 6, and the sliders 7 are slidably connected with the corresponding chutes 4. The sliding plate 6 is rotatably connected with a rotating plate 8. Four air outlets 9 are formed at the edge of the sliding plate 6, and the four air outlets 9 are arranged in a circumferential array. The air outlets 9 cooperate with communication holes 10 to discharge gas.

[0022] A driving assembly for driving the rotating plate 8 to rotate is arranged on a limiting plate 5. The driving assembly includes a slide bar. A circular hole is formed at the center of the limiting plate 5. The slide bar passes through the circular hole in the limiting plate 5 and is fixedly connected with the center of the rotating plate 8. A spiral groove 13 is formed on the outer periphery of the slide bar, and a protrusion is fixedly arranged in the circular hole. When the slide bar moves horizontally, the spiral groove 13 on the slide bar slidably cooperates with the protrusion in the circular hole to drive the slide bar to rotate. A rotating ring 11 is sleeved on the slide bar. The rotating ring 11 is rotatably connected with the rotating plate 8, and the rotating ring 11 is fixedly connected with one end of a spring 12.

[0023] A baffle 14 is fixedly arranged at one end of the slide bar away from the rotating plate 8. The diameter of the baffle 14 is larger than the aperture of the circular hole in the limiting plate 5. This prevents the slide bar from detaching from the limiting plate 5.

[0024] The working principle of an explosion-proof overpressure exhaust valve provided by the present utility model is as follows:

[0025] During use, the base 2 is installed at a position in a civil air defense project where exhaust is required through the mounting holes 3, and the sliding plate 6 faces the side close to the outside of the project. In the initial state, the spring 12 is in a stretched state, and the pulling force of the spring 12 drives the rotating plate 8 to fit with the rubber pad on the retaining ring 15.

[0026] When the air pressure in the project is greater than the set standard air pressure therein, the gas passes through the retaining ring 15 and pushes the rotating plate 8 to move outward. The rotating plate 8 stretches the spring 12, so that the rotating plate 8 disengages from the retaining ring 15, and the gas enters the communication hole 10 from the gap between the retaining ring 15 and the rotating plate 8. At the same time, the rotating plate 8 pushes the sliding plate 6 to move along the chute 4, and while the rotating plate 8 moves, it drives the slide bar to slide in the circular hole of the limiting plate 5. The slide bar drives the spiral groove 13 to move horizontally. The spiral groove 13 drives the slide bar to rotate under the limitation of the protrusion, so that the slide bar drives the rotating plate 8 to rotate during the movement. The rotation of the rotating plate 8 drives the communication hole 10 and the air outlet 9 to gradually partially overlap, so that the gas is discharged through the communication hole 10 and the air outlet 9, reducing the air pressure in the project.

[0027] And during the above process, the greater the air pressure in the project, the greater the sliding distance of the gas pushing the rotating plate 8. At this time, the gap between the rotating plate 8 and the retaining ring 15 is larger, and at the same time, the rotation angle of the rotating plate 8 is larger, making the overlapping area between the communication hole 10 and the air outlet hole 9 larger, thereby accelerating the exhaust speed. This enables the exhaust valve to automatically adjust the exhaust speed according to the air pressure in the project and keeps the appropriate air outlet pressure at the air outlet hole 9, preventing external gas from entering the project interior.

[0028] As the gas in the project is discharged and the air pressure in the project conforms to the standard air pressure, the pulling force of the spring 12 drives the rotating plate 8 to fit with the gasket on the retaining ring 15, thereby blocking the communication hole 10.

[0029] Through the fitting of the retaining ring 15 and the rotating plate 8 and the sealed rotation of the sliding plate 6 and the rotating plate 8, the retaining ring 15 and the sliding plate 6 simultaneously block the communication hole 10 on the rotating plate 8, thereby providing double sealing for the communication hole 10, effectively preventing external gas from entering the room, and improving the safety inside the civil air defense project.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof overpressure exhaust valve, comprising a housing (1), characterized in that: A limiting plate (5) is fixedly arranged on one side inside the housing (1). A rotating plate (8) is movably arranged inside the housing (1). At least one communication hole (10) is formed in the rotating plate (8). A spring (12) is arranged on one side of the rotating plate (8). The other end of the spring (12) is fixedly connected to the limiting plate (5). A retaining ring (15) is fixedly arranged inside the housing (1). The retaining ring (15) is located between the limiting plate (5) and the rotating plate (8). When the pulling force of the spring (12) on the rotating plate (8) is greater than the pushing force of the air pressure inside the project on the rotating plate (8), the spring (12) pulls the rotating plate (8) to fit with the retaining ring (15), and the retaining ring (15) blocks the communication hole (10). When the pulling force of the spring (12) on the rotating plate (8) is less than the pushing force of the air pressure inside the project on the rotating plate (8), the air pressure inside the project pushes the rotating plate (8) away from the retaining ring (15), so that the gas inside the project is discharged through the communication hole (10).

2. The explosion-proof overpressure exhaust valve according to claim 1, characterized in that: A sliding plate (6) is slidably arranged inside the housing (1). The sliding plate (6) is rotatably connected to the rotating plate (8). At least one air outlet hole (9) is formed in the sliding plate (6). The air outlet hole (9) cooperates with the communication hole (10) to discharge the gas. A driving component for driving the rotating plate (8) to rotate is arranged on the limiting plate (5).

3. The explosion-proof overpressure exhaust valve according to claim 2, characterized in that: The driving component includes a sliding rod. A round hole is formed in the limiting plate (5). The sliding rod passes through the round hole in the limiting plate (5) and is fixedly connected to the rotating plate (8). A spiral groove (13) is formed on the outer periphery of the sliding rod. A protrusion is fixedly arranged in the round hole. The spiral groove (13) on the sliding rod is slidably matched with the protrusion in the round hole. A rotating ring (11) is sleeved on the sliding rod. The rotating ring (11) is rotatably connected to the rotating plate (8). The rotating ring (11) is fixedly connected to the spring (12).

4. The explosion-proof overpressure exhaust valve according to claim 3, characterized in that: A baffle plate (14) is fixedly arranged at one end of the sliding rod away from the rotating plate (8). The diameter of the baffle plate (14) is larger than the aperture of the round hole in the limiting plate (5).

5. The explosion-proof overpressure exhaust valve according to claim 1, characterized in that: A base (2) is fixedly sleeved on the housing (1). A plurality of mounting holes (3) are formed in the base (2).

Images