Vacuum buffer tank overpressure explosion relief safety device

Abstract

The utility model discloses a kind of safety devices of vacuum buffer tank overpressure blow-down, including bearing bar, bearing bar is equipped with a pair of symmetry, the lower end of bearing bar is fixedly connected with valve body, piston is movably and sealingly installed in the inside of valve body, the upper portion of piston movably and sealingly penetrates valve body, swing bar is swinged and installed on bearing bar, the lower portion of swing bar is screw-mounted with heavy block. Anti-skid line is opened to the outside of heavy block. Valve body includes shell, the upper end of shell is fixedly connected with guide sleeve, when high-pressure gas overload is upwardly applied to piston, make piston upwardly lift swing bar, make swing bar drive heavy block to rise, in rising process, make the lower pressure lever of swing bar lengthen, increase the downward force of piston, make piston self-adapting high mode, open valve body internal space by piston lower end, make valve body carry out safe pressure relief, relative to spring pressure mode, improve the pressure durability and pressure stability, realize the safety stability of vacuum buffer tank overpressure blow-down.

Description

Technical Field

[0001] This utility model belongs to the technical field of vacuum buffer tank protection equipment, and in particular relates to an overpressure relief and explosion safety device for vacuum buffer tanks. Background Technology

[0002] Safety valves are safety protection devices installed on pressure vessels, pipelines, and other equipment. They automatically open to release the medium when the system pressure exceeds a set threshold through spring load or pilot-operated structure, and automatically reset after the pressure recovers. Their core function is to prevent equipment from being damaged by overpressure. However, they have structural and performance defects such as sealing surface leakage, spring failure, opening pressure deviation, and frequent chattering. Their reliability must be ensured through proper selection, regular calibration, and maintenance.

[0003] Weakened spring elasticity, breakage, or permanent deformation can cause the safety valve's set pressure to drift or prevent it from opening and closing properly. Inappropriate spring material selection (e.g., not suitable for high-temperature or corrosive environments), spring fatigue under long-term alternating loads, or frequent overpressure causing plastic deformation, or insufficient spring surface protection leading to corrosion (e.g., lack of anti-corrosion treatment in humid environments), can all result in relatively low durability of conventional safety valves.

[0004] To address this issue, we propose a vacuum buffer tank overpressure relief and explosion safety device. Utility Model Content

[0005] The purpose of this invention is to solve the problem of low durability of conventional safety valves, and to propose an overpressure relief and explosion safety device for a vacuum buffer tank.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A safety device for overpressure relief and explosion venting of a vacuum buffer tank includes bearing rods, a pair of which are symmetrically arranged. A valve body is fixedly connected to the lower end of each bearing rod. A piston is installed inside the valve body with a movable seal. The upper movable seal of the piston penetrates the valve body. A swing rod is oscillatingly mounted on each bearing rod, and a weight is threaded onto the lower part of the swing rod. The weight acts as a lever, acting on the swing rod to increase the downward pressure on the piston. This pressure, in turn, acts on the high-pressure gas below. When the high-pressure gas is overloaded, it acts upward on the piston, causing the piston to push the swing rod upward. This causes the swing rod to lift the weight. During the ascent, the downward lever of the swing rod lengthens, increasing the downward force on the piston. This allows the piston to adapt to its height, opening the internal space of the valve body through the lower end of the piston, enabling safe pressure relief. Compared to a spring-pressurized method, this device improves pressure durability and stability, achieving safe and stable overpressure relief of the vacuum buffer tank.

[0008] Preferably, the outer surface of the weight has anti-slip texture. The anti-slip texture increases the friction between the weight and the hand. By twisting the weight, it moves spirally along the swing rod, allowing adjustment of the pressure lever length or reduction of the pressure lever length, thus facilitating adjustment of the initial pressure.

[0009] Preferably, the valve body includes a housing, with a guide sleeve fixedly connected to the upper end of the housing, and the lower end of the bearing rod fixedly connected to the housing. The guide sleeve facilitates the guiding of the piston's movement.

[0010] Preferably, the piston includes a lifting rod, the lower end of which is fixedly connected to a valve plate. The valve plate is sealed inside the housing, and the lifting rod is movably and sealed through the upper part of the housing. The lifting rod is slidably installed within a guide sleeve. The guide sleeve guides the lifting rod to move up and down, improving the stability of the piston's movement. The valve plate seals the internal space of the housing, facilitating the opening or closing of the internal space.

[0011] Preferably, the piston further includes a hemispherical block, the lower end of which is fixedly connected to the upper end of the lifting rod. The hemispherical block increases the contact range between the piston and the swing rod.

[0012] Preferably, the swing lever includes a rod body, the lower part of which is in movable contact with the hemispherical block, a rotating shaft fixedly connected to the upper end of the rod body, the rotating shaft being rotatably mounted on a bearing rod, and a threaded rod fixedly connected to the lower end of the rod body, with the weight threadedly mounted on the threaded rod. The weight is spiraled along the threaded rod, causing it to move along the threaded rod and changing the lever length.

[0013] In summary, the technical effects and advantages of this utility model are as follows:

[0014] 1. The weight of the block acts as a lever on the swing rod, increasing the downward pressure on the piston. The piston then acts on the high-pressure gas below. When the high-pressure gas is overloaded, it acts upward on the piston, causing the piston to push the swing rod upward. This causes the swing rod to lift the block. During the ascent, the downward lever of the swing rod lengthens, increasing the downward force on the piston. This allows the piston to adapt to its height. The lower end of the piston opens the internal space of the valve body, allowing for safe pressure relief. Compared to the spring pressure method, this improves the pressure durability and stability, achieving safe and stable overpressure relief from the vacuum buffer tank.

[0015] 2. Use the anti-slip texture to increase the friction between the weight and your hand. Twist the weight to make it move along the swing arm. Adjust or reduce the length of the pressure lever to easily adjust the initial pressure.

[0016] 3. The guide sleeve guides the lifting rod to rise and fall, improving the stability of the piston's rising and falling direction. The valve plate seals the internal space of the outer shell, making it easy to open or close the internal space of the outer shell. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall segmented structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the valve body segmentation structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the piston structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the swing rod structure of this utility model.

[0021] In the diagram: 1. Bearing rod; 2. Valve body; 3. Piston; 4. Swing rod; 5. Weight; 6. Anti-slip texture; 21. Outer shell; 22. Guide sleeve; 31. Lifting rod; 32. Valve plate; 33. Hemispherical block; 41. Rod body; 42. Rotating shaft; 43. Threaded rod. Detailed Implementation

[0022] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments.

[0023] like Figure 1 As shown, a vacuum buffer tank overpressure relief and explosion safety device includes a bearing rod 1, a pair of bearing rods symmetrically arranged, a valve body 2 fixedly connected to the lower end of the bearing rod 1, a piston 3 is installed inside the valve body 2 with a movable seal, the upper part of the piston 3 is movablely sealed through the valve body 2, a swing rod 4 is oscillatingly installed on the bearing rod 1, and a weight 5 is threadedly installed on the lower part of the swing rod 4.

[0024] like Figure 1 As shown, the outer surface of the weight 5 is provided with anti-slip texture 6. The anti-slip texture 6 increases the friction between the weight 5 and the hand. By twisting the weight 5, the weight 5 moves spirally along the swing rod 4, adjusting or reducing the length of the pressure lever to adjust the initial pressure.

[0025] like Figure 1 and 2 As shown, the valve body 2 includes a housing 21, with a guide sleeve 22 fixedly connected to the upper end of the housing 21, and the lower end of the bearing rod 1 fixedly connected to the housing 21. The guide sleeve 22 guides the piston 3 to rise and fall.

[0026] like Figure 1 and 3As shown, the piston 3 includes a lifting rod 31, with a valve plate 32 fixedly connected to the lower end of the lifting rod 31. The valve plate 32 is sealed inside the housing 21, and the lifting rod 31 is movably and sealably inserted through the upper part of the housing 21. The lifting rod 31 is slidably installed inside the guide sleeve 22. The guide sleeve 22 guides the lifting rod 31 to rise and fall, improving the stability of the piston 3's rising and falling direction, while the valve plate 32 seals the internal space of the housing 21.

[0027] like Figure 1 and 3 As shown, the piston 3 also includes a hemispherical block 33, the lower end of which is fixedly connected to the upper end of the lifting rod 31. The hemispherical block 33 increases the contact range between the piston 3 and the swing rod 4.

[0028] like Figure 1 and 4 As shown, the swing lever 4 includes a lever body 41. The lower part of the lever body 41 is in movable contact with the hemispherical block 33. A rotating shaft 42 is fixedly connected to the upper end of the lever body 41. The rotating shaft 42 is rotatably mounted on the bearing rod 1. A threaded rod 43 is fixedly connected to the lower end of the lever body 41. A weight 5 is threaded onto the threaded rod 43. The weight 5 is spiraled along the threaded rod 43, causing the weight 5 to move along the threaded rod 43 and changing the lever length.

[0029] Working principle: The weight 5 acts as a lever to swing rod 4, which increases the downward pressure on piston 3. Piston 3 then acts on the high-pressure gas below. When the high-pressure gas is overloaded, it acts upward on piston 3, causing piston 3 to push swing rod 4 upward. This causes swing rod 4 to lift weight 5. During the ascent, the downward lever of swing rod 4 is lengthened, increasing the downward force on piston 3. This allows piston 3 to adapt to the height and open the internal space of valve body 2 through the lower end of piston 3, allowing valve body 2 to release pressure.

[0030] The above description is only a preferred embodiment of the utility model, but the protection scope of the utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed by the utility model, based on the technical solution and the utility model concept, should be included within the protection scope of the utility model.

[0031] The description briefly mentions the application direction of the utility model in relation to existing technologies known to those skilled in the art without modification, and combines them with the utility model to form a complete technology; it avoids excessive popularization of technologies known to those skilled in the art, in order to help those skilled in the art quickly understand the main content of the utility model.

Claims

1. A vacuum surge tank overpressure relief safety device, characterized by: Includes a bearing rod (1), a pair of bearing rods (1) are symmetrically arranged, a valve body (2) is fixedly connected to the lower end of the bearing rod (1), a piston (3) is installed inside the valve body (2) with a movable seal, the upper part of the piston (3) is movablely sealed through the valve body (2), a swing rod (4) is oscillatingly installed on the bearing rod (1), and a weight (5) is threadedly installed on the lower part of the swing rod (4).

2. The overpressure relief safety device for a vacuum surge tank according to claim 1, characterized in that: The outer surface of the weight (5) is provided with anti-slip texture (6).

3. The overpressure relief safety device for a vacuum surge tank according to claim 1, characterized in that: The valve body (2) includes a housing (21), the upper end of which is fixedly connected to a guide sleeve (22), and the lower end of the bearing rod (1) is fixedly connected to the housing (21).

4. The overpressure relief safety device for a vacuum surge tank according to claim 3, characterized in that: The piston (3) includes a lifting rod (31), the lower end of which is fixedly connected to a valve plate (32). The valve plate (32) is sealed inside the outer shell (21). The lifting rod (31) is movably and sealed through the upper part of the outer shell (21). The lifting rod (31) is slidably installed in the guide sleeve (22).

5. A vacuum surge tank overpressure relief safety device according to claim 4, characterized in that: The piston (3) also includes a hemispherical block (33), the lower end of which is fixedly connected to the upper end of the lifting rod (31).

6. A vacuum buffer tank overpressure relief safety device according to claim 5, characterized in that: The swing rod (4) includes a rod body (41), the lower part of which is in contact with the hemispherical block (33), the upper end of which is fixedly connected to a rotating shaft (42), the rotating shaft (42) is rotatably mounted on the bearing rod (1), the lower end of which is fixedly connected to a threaded rod (43), and the weight (5) is threadedly mounted on the threaded rod (43).

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