An automatic pressure relief air reservoir

Abstract

This application discloses an automatic pressure relief air storage tank, relating to the field of pressure vessel technology, comprising: a tank body; and a pressure relief cylinder, including a cylinder body and a pressure-bearing plate. The pressure-bearing plate is fixedly disposed on the inner side of the cylinder body, one end of which is fixedly connected to the inner side of the cylinder body, and the other end of which is connected to a spring plate. The end of the spring plate contacts the inner side of the cylinder body. The pressure-bearing plate and the spring plate divide the internal space of the cylinder body into two pressure relief spaces. Under air pressure, a gap is formed between the spring plate and the inner side of the cylinder body, and air is discharged through the gap from the pressure relief outlet. This application uses a spring plate to separate the pressure relief inlet and outlet of the pressure relief cylinder. When the pressure reaches the deformation pressure of the spring plate, the spring plate undergoes a certain deformation, allowing compressed air to flow through the gap between the spring plate and the inner wall of the pressure relief cylinder. With the use of a spring plate, only a small deformation is required, eliminating the sliding and rotating actions found in traditional pressure relief valves, thus greatly improving the service life of the storage tank.

Description

Technical Field

[0001] This application relates to the field of pressure vessel technology, and in particular to an automatic pressure relief air storage tank. Background Technology

[0002] Compressed air is an important material in industrial production, playing a crucial role in automated manufacturing. Compressed air is produced by a compressor, which compresses air, dehumidifies and cools it, and then stores it in a tank. Various equipment can access the compressed air at any time by connecting pipes to the outlet of the tank.

[0003] Since storage tanks are pressure vessels, they have a maximum pressure tolerance within a safe range. During production, it is necessary to ensure that the real-time pressure inside the tank does not exceed the maximum tolerance pressure to avoid safety accidents caused by tank damage. To address pressure control requirements, many storage tanks currently use pressure relief valves for pressure release. When the real-time pressure exceeds a certain value, the elastic element in the pressure relief valve is compressed or stretched, thereby expelling some air from the tank. When the pressure decreases, the pressure relief valve returns to a sealed state. For example, CN219102680U uses a buffer tank, a first pressure relief valve, an air bladder, and a second pressure relief valve to control the internal pressure of the storage tank.

[0004] However, the pressure relief valves, airbags, and other components used in the aforementioned patents have a large number of moving parts. After long-term service, the reliability of these moving parts will be greatly reduced, which will limit the overall service life of the storage tank. Summary of the Invention

[0005] This application provides an automatic pressure relief air storage tank to solve the problem that the service life of the pressure relief valve used in the prior art is greatly limited.

[0006] This application provides an automatic pressure relief air storage tank, including:

[0007] The tank body has an air inlet and an air outlet;

[0008] A pressure relief cylinder is installed at the air inlet or outlet. The pressure relief cylinder includes a cylinder body and a pressure-bearing plate. The cylinder body has a pressure relief inlet and a pressure relief outlet. The pressure-bearing plate is fixedly installed on the inner side of the cylinder body, and the pressure relief inlet and the pressure relief outlet are located on opposite sides of the pressure-bearing plate. One end of the pressure-bearing plate is fixedly connected to the inner side of the cylinder body, and the other end of the pressure-bearing plate is connected to a spring. The end of the spring that is away from the pressure-bearing plate contacts the inner side of the cylinder body. The pressure-bearing plate and the spring divide the internal space of the cylinder body into two pressure relief spaces. The pressure relief inlet and the pressure relief outlet are respectively connected to the two pressure relief spaces. Air enters the first pressure relief space through the pressure relief inlet. Under the pressure of the air, a gap is formed between the spring and the inner side of the cylinder body. The air enters the second pressure relief space through the gap and is discharged from the pressure relief outlet.

[0009] An automatic pressure relief air storage tank according to this application has the following advantages:

[0010] The pressure relief cylinder uses a spring-loaded separator to separate the pressure relief inlet and outlet. Compressed air enters the pressure relief cylinder through the pressure relief inlet and applies pressure to the spring-loaded separator. When the pressure reaches the deformation pressure of the spring-loaded separator, the separator undergoes a certain deformation, allowing the compressed air to flow through the gap between the spring-loaded separator and the inner wall of the pressure relief cylinder, and then be discharged from the pressure relief outlet. With the spring-loaded separator, only a very small deformation is required, and there is no sliding or rotating movement as in traditional pressure relief valves, which greatly improves the service life of the storage tank. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall structure of an automatic pressure relief air storage tank provided in an embodiment of this application;

[0013] Figure 2 This is a schematic diagram of the structure of the pressure relief cylinder provided in the embodiments of this application;

[0014] Figure 3 A schematic diagram of the drive rod and odor-adding canister in a sealed state, provided in an embodiment of this application;

[0015] Figure 4 This is a schematic diagram of the drive rod and odor-adding canister in the open state, as provided in an embodiment of this application.

[0016] Explanation of reference numerals: 100, tank body; 110, air inlet; 120, air outlet; 200, base; 300, pressure relief cylinder; 310, tee connector; 320, cylinder body; 330, pressure relief inlet; 340, pressure relief outlet; 350, pressure bearing plate; 351, spring; 360, drive rod; 361, plug; 370, odor-adding tank; 371, filling port; 372, cover; 373, through hole. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Figure 1-4 This is a schematic diagram of an automatic pressure relief air storage tank provided in an embodiment of this application. This application provides an automatic pressure relief air storage tank, comprising:

[0019] Tank 100, which has an air inlet 110 and an air outlet 120;

[0020] A pressure relief cylinder 300 is installed on the air inlet 110 or the air outlet 120. The pressure relief cylinder 300 includes a cylinder body 320 and a pressure-bearing plate 350. The cylinder body 320 has a pressure relief inlet 330 and a pressure relief outlet 340. The pressure-bearing plate 350 is fixedly installed on the inner side of the cylinder body 320, and the pressure relief inlet 330 and the pressure relief outlet 340 are respectively located on both sides of the pressure-bearing plate 350. One end of the pressure-bearing plate 350 is fixedly connected to the inner side of the cylinder body 320, and the other end of the pressure-bearing plate 350 is connected to a spring 351. The end of 351 away from the pressure plate 350 contacts the inner side of the cylinder 320. The pressure plate 350 and the spring plate 351 divide the space inside the cylinder 320 into two pressure relief spaces. The pressure relief inlet 330 and the pressure relief outlet 340 are respectively connected to the two pressure relief spaces. Air enters the first pressure relief space through the pressure relief inlet 330. Under the pressure of the air, the spring plate 351 forms a gap with the inner side of the cylinder 320. The air enters the second pressure relief space through the gap and is discharged from the pressure relief outlet 340.

[0021] For example, the air inlet 110 and the air outlet 120 are respectively provided at the top and bottom of the tank 100. After the air inlet pipe and the air outlet pipe are respectively connected to the air inlet 110 and the air outlet 120, the air that has been processed by compression, drying and cooling is transported through the air inlet and stored in the tank 100, while the equipment that needs to use compressed air can obtain compressed air through the air outlet pipe.

[0022] In the embodiments of this application, both the air inlet 110 and the air outlet 120 are provided with external threads. The pressure relief cylinder 300 is connected to the tee connector 310. One female end of the tee connector 310 is screwed into the external thread on the air inlet 110 or the air outlet 120, and one male end of the tee connector 310 is used to connect to the air inlet pipe or the air outlet pipe, so that compressed air can flow normally through the air inlet 110 or the air outlet 120. After entering the tank 100, the compressed air will also enter the first pressure relief space of the cylinder 320 to apply pressure to the pressure bearing plate 350 and the spring plate 351.

[0023] The pressure-bearing sheet 350 is a thin sheet with a thickness less than that of the cylinder 320. It has four end faces, three of which are sealed to the outer surface of the cylinder 320, preferably by welding. The remaining end face of the pressure-bearing sheet 350 is connected to the spring sheet 351. The spring sheet 351 can be part of the pressure-bearing sheet 350. It can be made of a different material and thickness than the pressure-bearing sheet 350 and is sealed to the end of the pressure-bearing sheet 350. The spring sheet 351 also has four end faces. One end face is connected to the pressure-bearing sheet 350, and the end face opposite to the pressure-bearing sheet 350 contacts the inner surface of the cylinder 320 to deform under high pressure and form a gap between it and the inner surface of the cylinder 320. The remaining two end faces of the spring sheet 351, namely the front end face and the rear end face, are also sealed to the inner surface of the cylinder 320.

[0024] Specifically, the spring piece 351 is an arc-shaped piece, and the inner surface of the cylinder 320 is tangent to the arc-shaped portion of the spring piece 351. Because the spring piece 351 is thin and its end face is in close contact with the inner surface of the cylinder 320, a relatively tight seal is formed. When compressed air enters the first pressure relief space through the pressure relief inlet 330, pressure is applied to the pressure-bearing plate 350 and the spring piece 351. When the pressure is less than the pressure threshold, neither the pressure-bearing plate 350 nor the spring piece 351 will deform. At this time, the seal between the spring piece 351 and the inner surface of the cylinder 320 will be maintained, preventing compressed air leakage. When the pressure reaches or exceeds the pressure threshold, the pressure plate 350 and the spring plate 351 will undergo certain deformation. For the spring plate 351, the pressure will cause the spring plate 351 to detach from the contact with the inner side of the cylinder 320, thereby forming a tiny gap between the two. Compressed air can flow into the second pressure relief space through this gap and then be discharged from the pressure relief outlet 340. After a certain amount of compressed air is discharged, the pressure will gradually decrease. When it returns to below the pressure threshold, the spring plate 351 rebounds, causing the gap to disappear and thus returning to the sealed state.

[0025] Since both the spring 351 and the cylinder 320 are typically made of metal, there may be gaps at their contact surfaces, leading to uncontrolled leakage of compressed air. This application provides a sealing strip at the contact point between the spring 351 and the inner surface of the cylinder 320. This sealing strip can be made of materials such as rubber to improve the reliability of the seal.

[0026] In one possible embodiment, the pressure plate 350 is provided with a drive rod 360 on the side facing the pressure relief outlet 340, and the cylinder 320 is provided with an odor-adding canister 370 on the inner side near the pressure relief outlet 340. The odor-adding canister 370 is used to store odorant. The end of the drive rod 360 is inserted into the odor-adding canister 370, and a plug 361 is provided at the end of the drive rod 360 inserted into the odor-adding canister 370. When the plug 361 is disengaged from the odor-adding canister 370 under the drive of the drive rod 360, the through hole 373 on the odor-adding canister 370 through which the drive rod 360 passes is opened, allowing the odorant to diffuse into the interior of the cylinder 320.

[0027] For example, under normal circumstances, the pressure inside the tank 100 changes slowly. When the pressure slightly exceeds the pressure threshold, the pressure relief cylinder 300 will release the overpressurized air, thereby reducing the pressure. Therefore, under normal circumstances, a sudden and significant increase in pressure will not occur. However, in some extreme cases, such as a malfunction of the compression equipment, the pressure inside the tank 100 may rise sharply, which is usually accompanied by a danger. To alert nearby personnel in dangerous situations, when excessive pressure causes the pressure plate 350 to deform significantly, opening the through-hole 373, the odorant in the odorizing canister 370 will diffuse into the second pressure relief space, mix with the air, and be discharged from the pressure relief outlet 340. At this time, nearby personnel can determine whether an overpressure hazard has occurred by the odor in the air.

[0028] In the embodiments of this application, the drive rod 360 is fixedly disposed at the center of the side of the pressure bearing plate 350 located on the side of the pressure relief outlet 340. This position is the largest in distance from each connection point with the cylinder 320, and therefore the deformation generated under pressure is also the largest, thereby providing the most sensitive detection.

[0029] Specifically, in this application, the drive rod 360 is also in a sealed state when the pressure plate 350 is not under pressure. In this state, the drive rod 360 is not subjected to axial pressure or thrust, and the plug 361 also precisely seals the through hole 373, preventing the odorant from leaking out. When the pressure plate 350 is under pressure and deforms, the drive rod 360 will move towards the odor-adding tank 370, thereby opening the through hole 373.

[0030] Furthermore, tetrahydrothiophene can be used as the odorant. A filling port 371 can also be provided on the outer surface of the cylinder 320, which communicates with the odor-adding tank 370. A cap 372 is provided on the filling port 371. As the air storage tank in this application is used for longer periods, the odorant will gradually decrease. Therefore, it is necessary to add odorant to the odor-adding tank 370 through the filling port 371. After adding, the cap 372 can be closed.

[0031] Furthermore, a base 200 can also be provided at the bottom of the tank body 100.

[0032] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0033] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An automatic pressure relief air storage tank, characterized in that, include: The tank (100) has an air inlet (110) and an air outlet (120). A pressure relief cylinder (300) is disposed on the air inlet (110) or the air outlet (120). The pressure relief cylinder (300) includes a cylinder body (320) and a pressure-bearing plate (350). The cylinder body (320) has a pressure relief inlet (330) and a pressure relief outlet (340). The pressure-bearing plate (350) is fixedly disposed on the inner side of the cylinder body (320), and the pressure relief inlet (330) and the pressure relief outlet (340) are respectively located on both sides of the pressure-bearing plate (350). One end of the pressure-bearing plate (350) is fixedly connected to the inner side of the cylinder body (320), and the other end of the pressure-bearing plate (350) is connected to a spring clip (351). The end of the spring piece (351) away from the pressure plate (350) contacts the inner side of the cylinder (320). The pressure plate (350) and the spring piece (351) divide the space inside the cylinder (320) into two pressure relief spaces. The pressure relief inlet (330) and the pressure relief outlet (340) are respectively connected to the two pressure relief spaces. Air enters the first pressure relief space through the pressure relief inlet (330). Under the pressure of the air, the spring piece (351) forms a gap with the inner side of the cylinder (320). The air enters the second pressure relief space through the gap and is discharged from the pressure relief outlet (340). The spring piece (351) is an arc-shaped piece, and the inner side of the cylinder (320) is tangent to the arc-shaped part of the spring piece (351); The pressure plate (350) has a drive rod (360) on its side facing the pressure relief outlet (340), and the cylinder (320) has an odor-adding can (370) on its inner side near the pressure relief outlet (340). The odor-adding can (370) is used to store odorant. The end of the drive rod (360) is inserted into the odor-adding can (370), and a plug (361) is provided at the end of the drive rod (360) inserted into the odor-adding can (370). When the pressure causes the pressure plate (350) to deform, the plug (361) is disengaged from the odor-adding can (370) under the drive of the drive rod (360), and the through hole (373) on the odor-adding can (370) through which the drive rod (360) passes is opened, allowing the odorant to diffuse into the interior of the cylinder (320). The spring piece (351) is provided with a sealing strip at the position where it contacts the inner side of the cylinder (320).

2. The automatic pressure relief air storage tank according to claim 1, characterized in that, A filling port (371) is provided on the outer side of the cylinder (320), the filling port (371) is connected to the odor-adding tank (370), and a cap (372) is provided on the filling port (371).

3. The automatic pressure relief air storage tank according to claim 1, characterized in that, The odorant used is tetrahydrothiophene.

4. An automatic pressure relief air storage tank according to claim 1, characterized in that, The pressure relief cylinder (300) is connected to the air inlet (110) or air outlet (120) via a three-way connector (310).

5. An automatic pressure relief air storage tank according to claim 1, characterized in that, The tank (100) is provided with a base (200) at its outer bottom.

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