High-efficiency pressure relief pressure vessel

Abstract

The invention relates to the technical field of pressure vessels, and provides an efficient pressure relief pressure vessel which comprises a vessel body, a pressure gauge and a first pressure relief valve, the pressure vessel further comprises a temporary discharge tank used for temporarily storing discharged gas and a liquid storage tank used for storing liquid, and a vertical pipe is fixedly installed in the temporary discharge tank; the vertical pipe is communicated with the first pressure release valve through a first connecting pipe, the bottom of the temporary discharge tank is communicated with the liquid storage tank through a second connecting pipe, an upper discharge hole is formed in the side face of the upper half portion of the vertical pipe, and a lower discharge hole is formed in the bottom end of the vertical pipe. A sealing piston and a linear driving element are arranged in the temporary discharging tank, and the sealing piston divides the interior of the temporary discharging tank into a low-pressure cavity and a gas-liquid conversion cavity. In the using process, gas is continuously extruded into liquid, the liquid is discharged into the liquid storage tank, the air pressure of the low-pressure cavity is always low, and it is guaranteed that the container body can conduct efficient pressure relief and discharge.

Description

Technical Field

[0001] The invention relates to the technical field of pressure vessels, and in particular to a pressure vessel with high-efficiency pressure relief. Background Art

[0002] As an indispensable key equipment in modern industry, pressure vessels play an extremely important role in many fields such as petrochemicals, energy, scientific research and military industry, and machinery manufacturing. They are designed to safely and efficiently store and transport various gas or liquid media, and can withstand high internal pressure in extreme environments to ensure the continuity and stability of the production process. However, the pressure-bearing capacity of pressure vessels is not unlimited. Exceeding its design limit will cause serious safety hazards, such as cracks, deformation, and even explosions in the container wall. These consequences may not only lead to property losses, but more importantly, they will seriously threaten the safety of people's lives.

[0003] At present, facing the situation of overpressure in pressure vessels, the most common way to deal with it is to directly open the pressure relief valve for pressure relief and discharge. Although this method is simple and direct, it has significant defects: the high-temperature and high-pressure medium is directly discharged into the environment, which may produce strong thermal radiation, noise and the spread of toxic and harmful substances, posing a direct threat to the health of on-site operators. In order to overcome the above shortcomings, more advanced and safe pressure vessel pressure reduction technology has begun to be adopted in modern industry. For example: setting up a container to receive the gas discharged by pressure relief, and recovering and reusing the energy released during the pressure relief process (such as heat energy and pressure energy), which not only improves energy efficiency but also reduces environmental pollution. Then, directly discharging the gas into another container will cause the pressure of the container to rise sharply, the pressure difference to decrease, and thus affect the pressure relief efficiency. Therefore, it is necessary to provide a pressure vessel with high-efficiency pressure relief to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a pressure vessel with high efficiency in pressure relief, aiming to solve the problems mentioned in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pressure vessel with high efficiency in pressure relief, comprising a container body, a pressure gauge, a first pressure relief valve and a flange seal, the pressure vessel also comprising a temporary discharge tank for temporarily storing exhaust gas and a liquid storage box for storing liquid, a vertical pipe is fixedly installed in the temporary discharge tank, the vertical pipe is connected to the first pressure relief valve through a first connecting pipe, the bottom of the temporary discharge tank is connected to the liquid storage box through a second connecting pipe, an upper discharge hole is arranged on the side of the upper half of the vertical pipe, a lower discharge hole is arranged on the bottom end of the vertical pipe, a sealing piston and a linear drive element are arranged inside the temporary discharge tank, the linear drive element is fixedly installed on the inner surface of the temporary discharge tank, the sealing piston is fixedly installed on the telescopic end of the linear drive element, a through hole is arranged on the surface of the sealing piston, the inner side surface of the through hole is slidably connected to the outer side surface of the vertical pipe, the outer side surface of the sealing piston is slidably connected to the inner side surface of the temporary discharge tank, and the sealing piston is located between the upper discharge hole and the lower discharge hole.

[0006] As a further solution of the present invention, the sealing piston divides the interior of the temporary discharge tank into a low-pressure chamber and a gas-liquid conversion chamber. The low-pressure chamber is located above the sealing piston, and the gas-liquid conversion chamber is located below the sealing piston. The setting of the low-pressure chamber facilitates the rapid discharge of gas in the container body. The gas-liquid conversion chamber is used to convert the discharged gas into liquid and squeeze the liquid into the liquid storage box to ensure that the low-pressure chamber is always in a low-pressure state.

[0007] As a further solution of the present invention, a first one-way valve is fixedly installed in the vertical pipe. The first one-way valve is located between the upper discharge hole and the lower discharge hole. The first one-way valve only allows air flow to flow from top to bottom to prevent gas backflow from causing the air pressure in the low-pressure chamber to increase.

[0008] As a further solution of the present invention, a second pressure relief valve and a second one-way valve are fixedly installed in the second connecting pipe. The installation position of the second pressure relief valve is closer to the gas-liquid conversion chamber than the second one-way valve. The second one-way valve only allows liquid to flow from the gas-liquid conversion chamber into the liquid storage tank. When the pressure inside the gas-liquid conversion chamber is higher than the first pressure threshold, the second pressure relief valve will automatically open; when the pressure inside the gas-liquid conversion chamber is lower than the second pressure threshold, the second pressure relief valve will automatically close. The first pressure threshold is higher than the second pressure threshold, and the second pressure threshold is higher than the saturated vapor pressure of the exhaust gas.

[0009] As a further solution of the present invention, the discharge port of the first pressure relief valve is connected to the input end of the first connecting pipe via a flange, and a discharge pipe is installed at the bottom of the liquid storage tank.

[0010] As a further solution of the present invention, the pressure gauge, the first pressure relief valve and the flange seal are all fixedly installed on the top surface of the container body. The pressure gauge is used to monitor the internal air pressure of the container body. When the pressure inside the container body is higher than a third pressure threshold, the first pressure relief valve will automatically open; when the pressure inside the container body is lower than a fourth pressure threshold, the first pressure relief valve will automatically close.

[0011] As a further solution of the present invention, a plurality of grooves are arranged on the side of the sealing piston, a sealing ring is installed in each groove, the surface of the sealing piston and the inner side of the temporary discharge tank are polished, and the surface of the sealing piston is coated with lubricating oil.

[0012] In summary, the beneficial effects of the present invention are:

[0013] By setting up a temporary discharge tank, the gas discharged from pressure relief can be temporarily stored, thus avoiding the adverse effects of random discharge of polluting gases on the environment. The setting of the liquid storage box facilitates the recycling of the gas discharged from pressure relief. By setting up a vertical pipe, an upper discharge hole, a lower discharge hole, a sealing piston and a linear drive element, and making the sealing piston located between the upper discharge hole and the lower discharge hole, the sealing piston divides the interior of the temporary discharge tank into a low-pressure chamber and a gas-liquid conversion chamber. The gas-liquid conversion chamber can convert the discharged gas into liquid and squeeze the liquid into the liquid storage box to ensure that the low-pressure chamber is always in a low-pressure state. During use, gas is continuously squeezed into liquid in the gas-liquid conversion chamber, and the liquid is discharged into the liquid storage box. In this way, the gas pressure in the low-pressure chamber can be ensured to be always low, and there is a large pressure difference between the container body and the low-pressure chamber, ensuring that the container body can perform efficient pressure relief discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0015] Figure 1 A schematic diagram of a three-dimensional structure of a pressure vessel with high efficiency pressure relief according to an embodiment of the present invention Figure 1 .

[0016] Figure 2 A schematic diagram of a three-dimensional structure of a pressure vessel with high efficiency pressure relief according to an embodiment of the present invention Figure 2 .

[0017] Figure 3 for Figure 1 A local enlarged schematic diagram of point A in the middle.

[0018] Figure 4 This is a schematic structural diagram of a temporary discharge tank in a pressure vessel with high efficiency in pressure relief according to an embodiment of the present invention.

[0019] Figure 5 The working state of a temporary discharge tank in a pressure vessel with high efficiency pressure relief according to an embodiment of the present invention Figure 1 .

[0020] Figure 6 The working state of a temporary discharge tank in a pressure vessel with high efficiency pressure relief according to an embodiment of the present invention Figure 2 .

[0021] Figure markings: 1-container body, 2-pressure gauge, 3-first pressure relief valve, 4-flange seal, 5-first connecting pipe, 6-flange, 7-temporary discharge tank, 8-liquid storage tank, 9-second connecting pipe, 10-discharge pipe, 11-vertical pipe, 12-upper discharge hole, 13-lower discharge hole, 14-sealing piston, 15-linear drive element, 16-low pressure chamber, 17-gas-liquid conversion chamber, 18-first one-way valve, 19-second pressure relief valve, 20-second one-way valve. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0024] See also Figures 1 to 6An embodiment of the present invention provides a pressure vessel with high efficiency in pressure relief, comprising a container body 1, a pressure gauge 2, a first pressure relief valve 3 and a flange seal 4, wherein the pressure gauge 2 is used to monitor the pressure inside the container body 1, and the pressure vessel further comprises a temporary discharge tank 7 for temporarily storing the exhaust gas and a liquid storage box 8 for storing the liquid. The temporary discharge tank 7 is used to temporarily store the gas discharged by pressure relief, thereby avoiding the adverse effects on the environment caused by the random discharge of polluting gases. The liquid storage box 8 is provided to facilitate the recycling of the gas discharged by pressure relief. A vertical pipe 11 is fixedly installed in the temporary discharge tank 7. The vertical pipe 11 is connected to the first pressure relief valve 3 through a first connecting pipe 5. The vertical pipe 11 passes through the top surface of the temporary discharge tank 7. The bottom of the temporary discharge tank 7 is connected to the liquid storage box 8 through a second connecting pipe 9. An upper discharge hole 12 is provided on the side of the upper half of the vertical pipe 11, and a lower discharge hole 13 is provided at the bottom end of the vertical pipe 11. The pressure-relieved gas will enter the temporary discharge tank 7 through the upper discharge hole 12 and the lower discharge hole 13. A sealing piston 14 and a linear drive element 15 are provided inside the temporary discharge tank 7. The linear drive element 15 is a cylinder, a hydraulic cylinder or an electric push rod. The linear drive element 15 is fixedly installed in the temporary discharge tank 7. On the shell of the temporary discharge tank 7, the sealing piston 14 is fixedly mounted on the telescopic end of the linear drive element 15, and the linear drive element 15 carries the sealing piston 14 to perform reciprocating linear motion in the vertical direction. The surface of the sealing piston 14 is provided with a through hole, and the inner side surface of the through hole is slidably connected with the outer side surface of the vertical pipe 11, and the outer side surface of the sealing piston 14 is slidably connected with the inner side surface of the temporary discharge tank 7. The sealing piston 14 is located between the upper discharge hole 12 and the lower discharge hole 13. The discharge port of the first pressure relief valve 3 is connected to the input end of the first connecting pipe 5 through a flange 6. A discharge pipe 10 is installed at the bottom of the liquid storage box 8, and the first pressure relief valve 3 and the first connecting pipe 5 can be disassembled.

[0025] In the embodiment of the present invention, the sealing piston 14 divides the interior of the temporary discharge tank 7 into a low-pressure chamber 16 and a gas-liquid conversion chamber 17. The low-pressure chamber 16 is located above the sealing piston 14, and the gas-liquid conversion chamber 17 is located below the sealing piston 14. The upper discharge hole 12 is located in the low-pressure chamber 16, and the lower discharge hole 13 is located in the gas-liquid conversion chamber 17. The setting of the low-pressure chamber 16 facilitates the rapid discharge of the gas in the container body 1. The gas-liquid conversion chamber 17 is used to convert the discharged gas into liquid and squeeze the liquid into the liquid storage box 10 to ensure that the low-pressure chamber 16 is always in a low-pressure state. During use, gas is continuously squeezed into liquid in the gas-liquid conversion chamber 17, and the liquid is discharged into the liquid storage box 10. In this way, the gas pressure in the low-pressure chamber 16 can be ensured to be always low, ensuring that the container body 1 can perform efficient pressure relief and discharge.

[0026] In an embodiment of the present invention, a first one-way valve 18 is fixedly installed in the vertical pipe 11. The first one-way valve 18 is located between the upper discharge hole 12 and the lower discharge hole 13. The first one-way valve 18 only allows air flow to flow from top to bottom, thereby preventing gas backflow from causing the air pressure in the low-pressure chamber 16 to increase.

[0027] In the embodiment of the present invention, a second pressure relief valve 19 and a second one-way valve 20 are fixedly installed in the second connecting pipe 9. The installation position of the second pressure relief valve 19 is closer to the gas-liquid conversion chamber 17 than the second one-way valve 20. The second one-way valve 20 only allows liquid to flow from the gas-liquid conversion chamber 17 into the liquid storage box 8 to avoid the backflow of high-pressure liquid. When the pressure inside the gas-liquid conversion chamber 17 is higher than the first pressure threshold, the second pressure relief valve 19 will automatically open; when the pressure inside the gas-liquid conversion chamber 17 is lower than the second pressure threshold, the second pressure relief valve 19 will automatically close. The first pressure threshold is higher than the second pressure threshold, and the second pressure threshold is higher than the saturated vapor pressure of the exhaust gas. In a closed condition, at a certain temperature, the pressure of the vapor in equilibrium with the solid or liquid is called the saturated vapor pressure, also known as the saturated vapor pressure or vapor pressure. When the liquid evaporates in a limited closed space, the liquid molecules enter the upper space through the liquid surface and become vapor molecules. These vapor molecules collide with each other in the space and reach a dynamic equilibrium state. The pressure generated at this time is the saturated vapor pressure at this temperature. That is, only when the gas is converted into liquid, the second pressure relief valve 19 will open.

[0028] In an embodiment of the present invention, the pressure gauge 2, the first pressure relief valve 3 and the flange seal 4 are all fixedly installed on the top surface of the container body 1. The pressure gauge 2 is used to monitor the internal air pressure of the container body 1. When the pressure inside the container body 1 is higher than the third pressure threshold, the first pressure relief valve 3 will automatically open; when the pressure inside the container body 1 is lower than the fourth pressure threshold, the first pressure relief valve 3 will automatically close. The first pressure threshold, the second pressure threshold, the third pressure threshold and the fourth pressure threshold are all fixed values ​​set in advance.

[0029] In an embodiment of the present invention, a plurality of grooves are provided on the side of the sealing piston 14, a sealing ring is installed in each groove, the surface of the sealing piston 14 and the inner side surface of the temporary discharge tank 7 are polished, and the surface of the sealing piston 14 is coated with lubricating oil, so that the sealing between the sealing piston 1 and the temporary discharge tank 7 is ensured.

[0030] The working process of the embodiment of the present invention is as follows: during use, when the pressure inside the container body 1 is higher than the third pressure threshold, the first pressure relief valve 3 will automatically open to relieve pressure, and the gas will enter the temporary discharge tank 7. The air pressure in the temporary discharge tank 7 will increase, and the linear drive element 15 will be started at this time, and the sealing piston 14 will move downward, so that the space of the low-pressure chamber 16 becomes larger, the pressure decreases, and the space of the gas-liquid conversion chamber 17 becomes smaller, and the pressure increases, thereby causing the gas to become liquid, and the liquid is discharged into the liquid storage box 10, and the reciprocating cycle can ensure that the air pressure in the low-pressure chamber 16 is always low, so as to ensure that the container body 1 can continue to perform efficient pressure relief and discharge.

[0031] For those skilled in the art, although several embodiments and examples of the present invention are described, these embodiments and examples are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the scope of the subject matter of the invention. These embodiments and their variations are included in the scope and subject matter of the invention, and are included in the invention described in the claims and the scope of their equivalents.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pressure vessel with high efficiency pressure relief, comprising a vessel body (1), a pressure gauge (2), a first pressure relief valve (3) and a flange seal (4), characterized in that: The pressure vessel further comprises a temporary discharge tank (7) for temporarily storing the discharge gas and a liquid storage tank (8) for storing the liquid. A vertical pipe (11) is fixedly installed in the temporary discharge tank (7). The vertical pipe (11) is connected to the first pressure relief valve (3) through a first connecting pipe (5). The bottom of the temporary discharge tank (7) is connected to the liquid storage tank (8) through a second connecting pipe (9). An upper discharge hole (12) is provided on the side of the upper half of the vertical pipe (11). A lower discharge hole (13) is provided at the bottom end of the vertical pipe (11). A sealing piston (14) and a linear drive element (15) are arranged inside the temporary discharge tank (7). The linear drive element (15) is fixedly mounted on the inner surface of the temporary discharge tank (7). The sealing piston (14) is fixedly mounted on the telescopic end of the linear drive element (15). A through hole is arranged on the surface of the sealing piston (14). The inner side surface of the through hole is connected to the outer side surface of the vertical pipe (11) in a sliding fit. The outer side surface of the sealing piston (14) is connected to the inner side surface of the temporary discharge tank (7) in a sliding fit. The sealing piston (14) is located between the upper discharge hole (12) and the lower discharge hole (13).

2. The high-efficiency pressure relief pressure vessel according to claim 1, characterized in that: The sealing piston (14) divides the interior of the temporary discharge tank (7) into a low-pressure chamber (16) and a gas-liquid conversion chamber (17). The low-pressure chamber (16) is located above the sealing piston (14), and the gas-liquid conversion chamber (17) is located below the sealing piston (14). The setting of the low-pressure chamber (16) facilitates the rapid discharge of gas in the container body (1). The gas-liquid conversion chamber (17) is used to convert the discharged gas into liquid and squeeze the liquid into the liquid storage box (10), thereby ensuring that the low-pressure chamber (16) is always in a low-pressure state.

3. The high-efficiency pressure relief pressure vessel according to claim 2, characterized in that: A first one-way valve (18) is fixedly installed in the vertical pipe (11). The first one-way valve (18) is located between the upper discharge hole (12) and the lower discharge hole (13). The first one-way valve (18) only allows airflow to flow from the upper side to the lower side.

4. The high-efficiency pressure relief pressure vessel according to claim 2, characterized in that: A second pressure relief valve (19) and a second one-way valve (20) are fixedly installed in the second connecting pipe (9); the installation position of the second pressure relief valve (19) is closer to the gas-liquid conversion chamber (17) than the second one-way valve (20); the second one-way valve (20) only allows liquid to flow from the gas-liquid conversion chamber (17) into the liquid storage tank (8); when the pressure inside the gas-liquid conversion chamber (17) is higher than a first pressure threshold, the second pressure relief valve (19) will automatically open; when the pressure inside the gas-liquid conversion chamber (17) is lower than a second pressure threshold, the second pressure relief valve (19) will automatically close; the first pressure threshold is higher than the second pressure threshold, and the second pressure threshold is higher than the saturated vapor pressure of the exhaust gas.

5. The high-efficiency pressure relief pressure vessel according to claim 2, characterized in that: The discharge port of the first pressure relief valve (3) is connected to the input end of the first connecting pipe (5) via a flange (6), and a discharge pipe (10) is installed at the bottom of the liquid storage box (8).

6. The high-efficiency pressure relief pressure vessel according to claim 2, characterized in that: The pressure gauge (2), the first pressure relief valve (3) and the flange seal (4) are all fixedly mounted on the top surface of the container body (1). The pressure gauge (2) is used to monitor the internal air pressure of the container body (1). When the pressure inside the container body (1) is higher than a third pressure threshold, the first pressure relief valve (3) will automatically open; when the pressure inside the container body (1) is lower than a fourth pressure threshold, the first pressure relief valve (3) will automatically close.

7. The high-efficiency pressure relief pressure vessel according to claim 2, characterized in that: The side of the sealing piston (14) is provided with a plurality of grooves, each of which is provided with a sealing ring. The surface of the sealing piston (14) and the inner side of the temporary discharge tank (7) are polished, and the surface of the sealing piston (14) is coated with lubricating oil.

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