Gas cylinder pressure pulse testing system

Abstract

This invention discloses a gas cylinder pressure pulse testing system, belonging to the technical field of testing equipment. It includes a first heat exchanger, a second heat exchanger, and a first integrated heating and cooling unit. The test medium output from the pressure pulse generating device sequentially passes through the first and second test medium channels and enters the gas cylinder. The heat exchange medium within the first integrated heating and cooling unit sequentially passes through the outlet end of the first integrated heating and cooling unit, the inlet end of the second heat exchange medium, the outlet end of the second heat exchange medium, the inlet end of the first heat exchange medium, the outlet end of the first heat exchange medium, and the inlet end of the first integrated heating and cooling unit, forming a heat exchange cycle. The test medium flowing through the second test medium channel can exchange heat with the heat exchange medium flowing through the second heat exchange medium channel, and the test medium flowing through the first test medium channel can exchange heat with the heat exchange medium flowing through the first heat exchange medium channel. This invention has high temperature regulation efficiency, improving the temperature control effect of the test medium.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a gas cylinder pressure pulse testing system. Background Technology

[0002] The gas cylinder pressure pulse testing system is mainly used for fatigue testing of high-pressure storage tanks such as gas cylinders. It involves periodically pressurizing and depressurizing the test medium (usually water or oil) inside the cylinder, forming a "pressurization-holding-depressurization-holding" cycle. Each complete cycle is called a pressure pulse, used to test the cylinder's fatigue resistance under long-term pressure cycling. During the test, the temperature of the test medium must be maintained within a set range, and pressure pulse fluctuations must be monitored.

[0003] Currently, to regulate the temperature of the test medium, heat exchangers are typically connected in parallel at both ends of the structure under test. A portion of the oil output from the pulse booster enters the heat exchanger for heating or cooling, while the other portion enters directly into the structure under test. The two streams of oil converge inside or downstream of the structure to regulate the oil temperature. However, due to the relatively high resistance of the heat exchanger branches, when the structure under test is connected in parallel with the heat exchanger, a large amount of oil bypasses the heat exchanger and enters directly into the structure, resulting in low temperature regulation efficiency. Consequently, the oil temperature may not meet the test requirements for a considerable period after the test device is started. Summary of the Invention

[0004] The purpose of this invention is to provide a gas cylinder pressure pulse testing system to solve the problems existing in the prior art, which has higher temperature regulation efficiency and improves the temperature control effect of the test medium.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a gas cylinder pressure pulse testing system, comprising a first heat exchanger, a second heat exchanger, and a first integrated heating and cooling unit, wherein:

[0007] The first heat exchanger has a first test medium channel and a first heat exchange medium channel; the first test medium inlet end of the first test medium channel is used to connect to the output end of the pressure pulse generating device.

[0008] The second heat exchanger has a second test medium channel and a second heat exchange medium channel; the first test medium outlet end of the first test medium channel is connected to the second test medium inlet end of the second test medium channel, and the second test medium outlet end of the second test medium channel is used to connect to the gas cylinder inlet end; the test medium output by the pressure pulse generating device can pass through the first test medium channel and the second test medium channel in sequence and enter the gas cylinder;

[0009] The first cooling and heating integrated unit's first cooling and heating integrated unit outlet end is connected to the second heat exchange medium inlet end of the second heat exchange medium channel. The first cooling and heating integrated unit's first cooling and heating integrated unit inlet end is connected to the first heat exchange medium outlet end of the first heat exchange medium channel. The second heat exchange medium outlet end is connected to the first heat exchange medium inlet end. The heat exchange medium in the first cooling and heating integrated unit can sequentially pass through the first cooling and heating integrated unit outlet end, the second heat exchange medium inlet end, the second heat exchange medium outlet end, the first heat exchange medium inlet end, the first heat exchange medium outlet end, and the first cooling and heating integrated unit inlet end to form a heat exchange cycle. The test medium flowing through the second test medium channel can exchange heat with the heat exchange medium flowing through the second heat exchange medium channel. The test medium flowing through the first test medium channel can exchange heat with the heat exchange medium flowing through the first heat exchange medium channel.

[0010] Preferably, it further includes an environmental chamber and an environmental temperature control device, wherein the environmental chamber has an inner cavity for placing the gas cylinder, the inner cavity of the environmental chamber is filled with an environmental medium, and the environmental temperature control device is used to adjust the temperature of the environmental medium.

[0011] Preferably, it further includes a pressure pulse generating device, the input end of which is connected to the medium tank, and the output end of which is connected to the inlet end of the first test medium.

[0012] Preferably, it further includes a gas cylinder, a connecting pipeline, and a return pipeline. The inlet end of the gas cylinder is connected to the outlet end of the second test medium. One end of the return pipeline is connected to the outlet end of the gas cylinder, and the other end of the return pipeline is connected to the medium tank. One end of the connecting pipeline is connected to the return pipeline, and the other end of the connecting pipeline is connected to the pipeline between the outlet end of the first test medium and the inlet end of the second test medium.

[0013] Preferably, the system further includes a first control valve, a second control valve, and a third control valve. The first control valve is disposed on the pipeline between the outlet end of the first test medium and the inlet end of the second test medium. The connection point on the connecting pipeline that connects to the return pipeline is a side wall connection point. The second control valve is disposed on the return pipeline and is disposed between the outlet end of the gas cylinder and the side wall connection point. The third control valve is disposed on the connecting pipeline.

[0014] Preferably, it also includes a fourth control valve, which is disposed on the return pipeline and between the side wall connection point and the medium tank.

[0015] Preferably, the pressure pulse generating device includes at least one pulse booster, each pulse booster including a body, a sleeve, and a piston. The piston includes a first piston and a second piston, the diameter of the first piston being larger than the diameter of the second piston, and a first end face of the first piston being fixedly connected to a second end face of the second piston. The sleeve is fitted inside the body, and the outer side wall of the sleeve is fixedly connected to the inner side wall of the body. The first piston is fitted inside the body, and the outer side wall of the first piston is slidably connected to the inner side wall of the body. The end of the second piston away from the first piston is fitted inside the sleeve and slidably connected to the sleeve. The second end face of the first piston, a portion of the inner side wall of the body, and the first inner end wall of the body form a first control cavity. The first end face of the piston, a portion of the inner sidewall of the body, and the second inner end wall of the body form a high-pressure oil chamber; the second end face of the second piston, a portion of the outer sidewall of the second piston, a portion of the inner sidewall of the body, and the end face of the sleeve near the first piston form a second control chamber; the body is provided with an oil inlet and an oil outlet communicating with the high-pressure oil chamber, the oil outlet being the output end of the pressure pulse generating device, and the oil inlet being the input end of the pressure pulse generating device. By introducing oil into the first control chamber and discharging the oil in the second control chamber, the piston can move in a first direction; by introducing oil into the second control chamber and discharging the oil in the first control chamber, the piston can move in a second direction, the first direction and the second direction being opposite directions.

[0016] Preferably, the pressure pulse generating device further includes a hydraulic oil source, a one-way valve, and two fifth control valves. There are two pulse boosters, and each fifth control valve corresponds to one of the pulse boosters. Each fifth control valve is connected to the hydraulic oil source, the corresponding first control chamber, and the corresponding second control chamber. The inlet end of the one-way valve is used to connect and communicate with the medium oil tank, and the outlet end of the one-way valve is connected and communicated with the oil inlet ends of the two pulse boosters.

[0017] Preferably, it further includes a medium oil tank, a first overflow valve, a second overflow valve, and a third overflow valve. The first overflow valve is disposed on the pipeline between the medium oil tank and the one-way valve. The second overflow valve is disposed on the pipeline between the fourth control valve and the medium oil tank. The inlet and outlet of the second overflow valve are respectively connected to the outlet of the first integrated cooling and heating unit and the inlet of the first integrated cooling and heating unit.

[0018] Preferably, the device further includes a pump body, a pressure sensor, and a temperature sensor. The pump body is installed on the pipeline between the input end of the pressure pulse generating device and the medium oil tank. Pressure sensors are installed at the output ends of the pump body and the pressure pulse generating device. Temperature sensors are installed in the inner cavity of the medium oil tank, at the output end of the pressure pulse generating device, and at the inlet end of the gas cylinder.

[0019] The present invention achieves the following technical effects compared to the prior art:

[0020] This invention provides a gas cylinder pressure pulse testing system, comprising a first heat exchanger, a second heat exchanger, and a first integrated heat exchanger. The first test medium inlet of the first test medium channel is connected to the output of a pressure pulse generating device; the first test medium outlet of the first test medium channel is connected to the second test medium inlet of the second test medium channel, and the second test medium outlet of the second test medium channel is connected to the gas cylinder inlet; the test medium output by the pressure pulse generating device can sequentially pass through the first and second test medium channels and enter the gas cylinder; the first integrated heat exchanger outlet is connected to the second heat exchanger inlet of the second heat exchange medium channel. The connection is as follows: the outlet end of the second heat exchange medium is connected to the inlet end of the first heat exchange medium; the inlet end of the first integrated cooling and heating unit is connected to the outlet end of the first heat exchange medium channel; the heat exchange medium in the first integrated cooling and heating unit can sequentially pass through the outlet end of the first integrated cooling and heating unit, the inlet end of the second heat exchange medium, the outlet end of the second heat exchange medium, the inlet end of the first heat exchange medium, the outlet end of the first heat exchange medium, and the inlet end of the first integrated cooling and heating unit to form a heat exchange cycle; the test medium flowing through the second test medium channel can exchange heat with the heat exchange medium flowing through the second heat exchange medium channel, and the test medium flowing through the first test medium channel can exchange heat with the heat exchange medium flowing through the first heat exchange medium channel.

[0021] The first heat exchanger, the second heat exchanger, and the first integrated heating and cooling unit constitute the medium temperature control device. This device is located between the output of the pressure pulse generator and the inlet of the gas cylinder, meaning it is connected in series with the gas cylinder. This allows all test media to be heated or cooled before entering the gas cylinder, thus controlling the temperature of the test media. Compared to the existing technology where the medium temperature control device is connected in parallel with the gas cylinder, the temperature regulation efficiency is higher. The test media can be heated or cooled to the required temperature shortly after the medium temperature control device is activated. The heat exchange medium sequentially flows through the outlet of the first integrated heating and cooling unit, the inlet of the second heat exchange medium, the outlet of the second heat exchange medium, the inlet of the first heat exchange medium, the outlet of the first heat exchange medium, and the inlet of the first integrated heating and cooling unit. In other words, the heat exchange medium flows sequentially through the two heat exchangers and returns to the first integrated heating and cooling unit, achieving a circulating flow. The test medium enters the first heat exchanger from the first test medium inlet, exchanges heat with the heat exchange medium in the first heat exchange medium channel, and then flows through the first test medium outlet to the second test medium inlet, entering the second heat exchanger. After exchanging heat with the heat exchange medium in the second heat exchange medium channel, it flows through the second test medium outlet to the gas cylinder inlet, thus achieving temperature regulation for the pressure pulse test. The first integrated heating and cooling unit heats or cools the heat exchange medium according to the test temperature requirements, thereby heating or cooling the test medium through the heat exchange medium. Taking heating as an example, when the test medium flows through the first heat exchanger, its temperature is relatively low, with a large difference from the preset temperature. However, when it enters the second heat exchanger after heat exchange in the first heat exchanger, its temperature is relatively high, with a smaller difference from the preset temperature. To adapt to this characteristic, the heat exchange medium first passes through the second heat exchanger, where the temperature of the heat exchange medium is higher, and the temperature of the test medium can be brought closer to the preset temperature through heat exchange. Then it passes through the first heat exchanger, where the temperature of the heat exchange medium is lower, and its main function is to preheat the test medium, thereby improving the temperature control effect of the test medium. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. 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 effort.

[0023] Figure 1 This is a schematic diagram of the gas cylinder pressure pulse testing system of the present invention;

[0024] Figure 2 This is a partial structural diagram of the gas cylinder pressure pulse testing system of the present invention;

[0025] Figure 3 This is a schematic diagram of the pulse booster in this invention.

[0026] In the diagram: 100, gas cylinder; 1001, gas cylinder inlet; 1002, gas cylinder outlet.

[0027] 101. Test medium inlet; 102. Test medium outlet; 103. Heat exchange medium inlet; 104. Heat exchange medium outlet;

[0028] 1. Medium oil tank; 11. Return pipeline; 111. Fourth control valve; 12. Pump body;

[0029] 2. Medium temperature control device; 21. First integrated cooling and heating unit; 211. Inlet end of the first integrated cooling and heating unit; 212. Outlet end of the first integrated cooling and heating unit; 22. First heat exchanger; 221. Inlet end of the first test medium; 222. Outlet end of the first test medium; 223. Inlet end of the first heat exchange medium; 224. Outlet end of the first heat exchange medium; 23. Second heat exchanger; 231. Inlet end of the second test medium; 232. Outlet end of the second test medium; 233. Inlet end of the second heat exchange medium; 234. Outlet end of the second heat exchange medium;

[0030] 31. Environmental chamber; 311. Inner cavity of environmental chamber; 312. Inlet end of environmental chamber; 313. Outlet end of environmental chamber; 32. Ambient temperature control device; 321. Inlet end of second integrated cooling and heating unit; 322. Outlet end of second integrated cooling and heating unit;

[0031] 4. Pulse booster; 401. Oil inlet; 402. Oil outlet; 403. High-pressure oil chamber; 404. First control chamber; 405. Second control chamber; 41. Piston;

[0032] 5. Check valve;

[0033] 6. Piston drive assembly; 61. Hydraulic oil source; 62. Fifth control valve;

[0034] 71. Pressure sensor; 72. Temperature sensor;

[0035] 81. First control valve; 82. Second control valve; 83. Third control valve; 831. Connecting pipeline;

[0036] 91. First overflow valve; 911. First overflow pipeline; 92. Second overflow valve; 93. Third overflow valve; 931. Second overflow pipeline. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "center," "longitudinal," "transverse," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "clockwise," and "counterclockwise," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Additionally, it should be noted that in the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] The purpose of this invention is to provide a gas cylinder pressure pulse testing system to solve the problems existing in the prior art, which has higher temperature regulation efficiency and improves the temperature control effect of the test medium.

[0040] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like Figures 1-3As shown, the present invention provides a gas cylinder pressure pulse testing system, including a first heat exchanger 22, a second heat exchanger 23, and a first integrated cooling and heating unit 21, wherein: the first heat exchanger 22 has a first test medium channel and a first heat exchange medium channel; the first test medium inlet end 221 of the first test medium channel is used to connect to the output end of a pressure pulse generating device; the second heat exchanger 23 has a second test medium channel and a second heat exchange medium channel; the first test medium outlet end 222 of the first test medium channel is connected to the second test medium inlet end 231 of the second test medium channel, and the second test medium outlet end 232 of the second test medium channel is used to connect to the gas cylinder inlet end 1001; the test medium output by the pressure pulse generating device can sequentially pass through the first test medium channel and the second test medium channel and enter the gas cylinder 100; the first integrated cooling and heating unit 21 has a first integrated cooling and heating unit 21. The outlet end 212 of the first integrated cooling and heating unit 21 is connected to the inlet end 233 of the second heat exchange medium channel. The inlet end 211 of the first integrated cooling and heating unit 21 is connected to the outlet end 224 of the first heat exchange medium channel. The outlet end 234 of the second heat exchange medium is connected to the inlet end 223 of the first heat exchange medium. The heat exchange medium in the first integrated cooling and heating unit 21 can sequentially pass through the outlet end 212, the inlet end 233, the outlet end 234, the inlet end 223, the outlet end 224, and the inlet end 211 of the first integrated cooling and heating unit, forming a heat exchange cycle. The test medium flowing through the second test medium channel can exchange heat with the heat exchange medium flowing through the second heat exchange medium channel, and the test medium flowing through the first test medium channel can exchange heat with the heat exchange medium flowing through the first heat exchange medium channel. As a preferred embodiment, the test medium is oil. The test medium can also be a gaseous medium or other forms.

[0042] The first heat exchanger 22, the second heat exchanger 23, and the first integrated heating and cooling unit 21 constitute the medium temperature control device 2. The medium temperature control device 2 is located between the output end of the pressure pulse generating device and the gas cylinder inlet 1001, i.e., the medium temperature control device 2 is connected in series with the gas cylinder 100. This allows all test media to be heated or cooled before entering the gas cylinder 100, thus controlling the temperature of the test media. Compared to the prior art scheme where the medium temperature control device 2 is connected in parallel with the gas cylinder 100, the temperature regulation efficiency is higher. The test media can be heated or cooled to the required temperature shortly after the medium temperature control device 2 is activated. The heat exchange medium sequentially passes through the outlet end 212 of the first integrated heating and cooling unit, the inlet end 233 of the second heat exchange medium, the outlet end 234 of the second heat exchange medium, the inlet end 223 of the first heat exchange medium, the outlet end 224 of the first heat exchange medium, and the inlet end 211 of the first integrated heating and cooling unit. That is, the heat exchange medium flows sequentially through the two heat exchangers and returns to the first integrated heating and cooling unit 21, achieving a circulating flow. The test medium enters the first heat exchanger 22 from the first test medium inlet 221, exchanges heat with the heat exchange medium in the first heat exchange medium channel, and then flows through the first test medium outlet 222 to the second test medium inlet 231, entering the second heat exchanger 23. After exchanging heat with the heat exchange medium in the second heat exchange medium channel, it flows through the second test medium outlet 232 to the gas cylinder inlet 1001, thus achieving temperature regulation for the pressure pulse test. The first integrated heating and cooling unit 21 heats or cools the heat exchange medium according to the test temperature requirements, thereby heating or cooling the test medium through the heat exchange medium. Taking heating as an example, when the test medium flows through the first heat exchanger 22, its temperature is relatively low, with a large difference from the preset temperature. However, when it enters the second heat exchanger 23 after heat exchange in the first heat exchanger 22, its temperature is relatively high, with a smaller difference from the preset temperature. To adapt to this characteristic, the heat exchange medium first passes through the second heat exchanger 23, where the temperature of the heat exchange medium is higher, and the temperature of the test medium can be brought closer to the preset temperature through heat exchange. Then it passes through the first heat exchanger 22, where the temperature of the heat exchange medium is lower, and its main function is to preheat the test medium, thereby improving the temperature control effect of the test medium.

[0043] In some specific embodiments, an environmental chamber 31 and an environmental temperature control device 32 are also included. The environmental chamber 31 has an inner cavity 311 for placing the gas cylinder 100. The inner cavity 311 is filled with an environmental medium, and the environmental temperature control device 32 is used to regulate the temperature of the environmental medium. The environmental temperature control device 32 is used to regulate the temperature of the environmental medium, thereby adjusting the temperature of the environmental medium in contact with the outer wall of the gas cylinder 100. By setting up the environmental chamber 31 and the environmental temperature control device 32, the gas cylinder 100 is placed inside the inner cavity 311 of the environmental chamber, and the temperature of the environmental medium is controlled by the environmental temperature control device 32, so that the gas cylinder 100 is kept in a constant temperature environment, which can reduce testing errors.

[0044] In some embodiments, the environmental medium is air, while in other embodiments, the environmental medium may be other gaseous or liquid media.

[0045] In some specific embodiments, the ambient temperature control device 32 is a second integrated heating and cooling unit, which has an inlet end 321 and an outlet end 322. The ambient chamber 31 has an inlet end 312 and an outlet end 313. The second integrated heating and cooling unit can heat or cool the ambient medium. The heated or cooled ambient medium flows from the outlet end 322 to the inlet end 312 and then enters the inner cavity 311 of the ambient chamber. In addition, the ambient medium can also flow from the outlet end 313 to the inlet end 321 of the second integrated heating and cooling unit and re-enter the second integrated heating and cooling unit, thereby circulating the heating or cooling of the ambient medium to maintain a constant temperature of the ambient medium in the inner cavity 311 of the ambient chamber.

[0046] In some specific embodiments, a pressure pulse generating device is also included. The input end of the pressure pulse generating device is connected to the medium oil tank 1, and the output end of the pressure pulse generating device is connected to the first test medium inlet 221. By generating pressure pulses through the pressure pulse generating device, the oil pressure inside the structure under test can be made to fluctuate pulses, thereby realizing pressure pulse testing.

[0047] In some specific embodiments, the system also includes a gas cylinder 100, a connecting pipe 831, and a return pipe 11. The gas cylinder inlet 1001 is connected to the second test medium outlet 232. One end of the return pipe 11 is connected to the gas cylinder outlet 1002, and the other end of the return pipe 11 is connected to the medium tank 1. One end of the connecting pipe 831 is connected to the return pipe 11, and the other end of the connecting pipe 831 is connected to the pipe between the first test medium outlet 222 and the second test medium inlet 231.

[0048] In some specific embodiments, the system further includes a first control valve 81, a second control valve 82, and a third control valve 83. The first control valve 81 is disposed on the pipeline between the first test medium outlet 222 and the second test medium inlet 231 to control the on / off connection between the first heat exchanger 22 and the second heat exchanger 23. The connection point on the connecting pipeline 831 that connects to the return pipeline 11 is a side wall connection point. The second control valve 82 is disposed on the return pipeline 11 and is disposed between the gas cylinder outlet 1002 and the side wall connection point. The third control valve 83 is disposed on the connecting pipeline 831 to control the on / off connection of the connecting pipeline 831.

[0049] In some specific embodiments, a fourth control valve 111 is also included. The fourth control valve 111 is disposed on the return pipeline 11 and between the side wall connection point and the medium oil tank 1. A second control valve 82 is disposed between the gas cylinder outlet end 1002 and the fourth control valve 111. The second control valve 82 is used to control the on / off connection between the gas cylinder outlet end 1002 and the fourth control valve 111. When it is necessary to unload the gas cylinder 100, the second control valve 82 and the fourth control valve 111 are opened, and the first control valve 81 and the third control valve 83 are closed. The test medium in the gas cylinder 100 flows back to the medium oil tank 1 through the return pipeline 11. When it is necessary to pressurize the gas cylinder 100 for a pressure pulse test, the first control valve 81 and the second control valve 82 are opened, and the third control valve 83 is closed. At this time, the test medium can flow to the gas cylinder inlet 1001 through the first heat exchanger 22 and the second heat exchanger 23. In addition, the connection or disconnection between the gas cylinder outlet 1002 and the medium tank 1 is controlled by the fourth control valve 111 according to the actual situation. When the test medium enters the gas cylinder 100 through the gas cylinder inlet 1001, the fourth control valve 111 is closed to keep the pressure of the test medium inside the gas cylinder 100 in a pulse fluctuation state. When the pressure pulse test is performed, after one test is completed, the return pipeline 11 can be connected through the fourth control valve 111 to complete the unloading. When it is necessary to disassemble or repair the gas cylinder 100 or the second heat exchanger 23, the third control valve 83 and the fourth control valve 111 are opened, and the first control valve 81 and the second control valve 82 are closed, so that the gas cylinder 100 or the second heat exchanger 23 is disconnected from the gas cylinder pressure pulse test system. The test medium flows directly from the connecting pipeline 831 to the fourth control valve 111, and then flows back to the medium oil tank 1.

[0050] In some specific embodiments, the environmental chamber 31, the second heat exchanger 23, and the environmental temperature control device 32 constitute a whole to form a gas cylinder mounting platform, which is connected to the outside only through a few connection ports. In this embodiment, the gas cylinder mounting platform has a test medium inlet 101, a test medium outlet 102, a heat exchange medium inlet 103, and a heat exchange medium outlet 104. Among them, the first test medium outlet 222 is connected to the second test medium inlet 231 through the test medium inlet 101; the medium tank 1 is connected to the fourth control valve 111 through the test medium outlet 102; the first integrated cooling and heating unit outlet 212 is connected to the second heat exchange medium inlet 233 through the heat exchange medium inlet 103; and the first heat exchange medium inlet 223 is connected to the second heat exchange medium outlet 234 through the heat exchange medium outlet 104.

[0051] In some specific embodiments, the pressure pulse generating device includes at least one pulse booster 4. Each pulse booster 4 includes a body, a sleeve, and a piston 41. The piston 41 includes a first piston and a second piston. The diameter of the first piston is larger than the diameter of the second piston. The first end face of the first piston is fixedly connected to the second end face of the second piston, preferably integrally formed, i.e., the piston 41 is T-shaped. The sleeve is fitted inside the body, and the outer side wall of the sleeve is fixedly connected to the inner side wall of the body. The first piston is fitted inside the body, and the outer side wall of the first piston can be slidably connected to the inner side wall of the body. The end of the second piston away from the first piston is fitted inside the sleeve and slidably connected to the sleeve. The second end face of the first piston, a portion of the inner side wall of the body, and the first inner end wall of the body form a first control cavity 404. The first end face of the second piston... A high-pressure oil chamber 403 is formed by the inner sidewall of the body and the second inner end wall of the body; a second control chamber 405 is formed by the first end face of the first piston, a portion of the outer sidewall of the second piston, a portion of the inner sidewall of the body and the end face of the sleeve near the first piston; an oil inlet end 401 and an oil outlet end 402 communicating with the high-pressure oil chamber 403 are provided on the body. The oil outlet end 402 is the output end of the pressure pulse generating device, and the oil inlet end 401 is the input end of the pressure pulse generating device. By introducing oil into the first control chamber 404 and discharging the oil in the second control chamber 405, the piston 41 can move in the first direction. By introducing oil into the second control chamber 405 and discharging the oil in the first control chamber 404, the piston 41 can move in the second direction. The first direction and the second direction are opposite directions. Piston 41 is used to increase or decrease the volume of high-pressure oil chamber 403. The test medium in medium tank 1 can flow into high-pressure oil chamber 403 from oil inlet 401. By controlling the reciprocating motion of piston 41 relative to the body, the oil pressure at oil outlet 402 of pulse booster 4 can be made to pulsate, causing the oil in high-pressure oil chamber 403 to flow towards oil outlet 402. Specifically, by sliding piston 41 along the inner wall of the body, the position of the first end face of the second piston is changed, thereby increasing or decreasing the volume of high-pressure oil chamber 403. The oil in the first control chamber 404 and the second control chamber 405 act together on piston 41 to push piston 41 to move.

[0052] In some specific embodiments, the pressure pulse generating device further includes a hydraulic oil source 61, a one-way valve 5, and two fifth control valves 62. There are two pulse boosters 4, and each fifth control valve 62 corresponds to one pulse booster 4. Each fifth control valve 62 is connected to the hydraulic oil source 61, the corresponding first control chamber 404, and the corresponding second control chamber 405. The inlet end of the one-way valve 5 is connected to and communicates with the medium oil tank 1, and the outlet end of the one-way valve 5 is connected to and communicates with the oil inlet ends 401 of the two pulse boosters 4. The hydraulic oil source 61 and the fifth control valves 62 form a piston drive assembly 6, which drives the piston 41 to reciprocate relative to the body, thereby increasing or decreasing the volume of the high-pressure oil chamber 403. When the volume of the high-pressure oil chamber 403 increases, the air pressure inside the high-pressure oil chamber 403 can draw oil from the medium oil tank 1 through the one-way valve 5. When the volume of the high-pressure oil chamber 403 decreases, it can push the oil out of the high-pressure oil chamber 403. The one-way valve 5 is configured to allow the test medium to flow only from the medium tank 1 to the inlet 401. Due to the presence of the one-way valve 5, the oil cannot flow back to the medium tank 1, thus allowing the oil to flow through the outlet 402 to the medium temperature control device 2. Specifically: the hydraulic oil source 61 supplies oil to the fifth control valve 62, which has a first state and a second state. When the fifth control valve 62 is in the first state, it allows oil to flow into the first control chamber 404 and out of the second control chamber 405, causing the piston 41 to move in a first direction. The first direction is... Figure 3 In the upward direction, the volume of the high-pressure oil chamber 403 decreases; when the fifth control valve 62 is in the second state, the fifth control valve 62 is used to allow oil to flow into the second control chamber 405 and to allow oil in the first control chamber 404 to flow out, so that the piston 41 moves in the opposite direction of the first direction, which is... Figure 3 In the downward direction, the volume of the high-pressure oil chamber 403 increases. The piston drive assembly 6 drives the piston 41 to reciprocate by controlling the flow of oil between the first control chamber 404 and the second control chamber 405, thereby increasing or decreasing the volume of the high-pressure oil chamber 403. Two pulse boosters 4 and two fifth control valves 62 are provided, with each pulse booster 4 connected to a corresponding fifth control valve 62. The hydraulic oil source 61 simultaneously supplies oil to the fifth control valves 62. A check valve 5 is connected to the inlet 401 of both pulse boosters 4, and the medium temperature control device 2 is connected to the outlet 402 of both pulse boosters 4, thus enabling the two pulse boosters 4 to simultaneously output pressure pulses for more stable output.

[0053] It should be noted that the appropriate number of pulse boosters 4 can be selected according to the different volumes of gas cylinders 100 and the required pulse frequency to adapt to actual needs and achieve energy saving.

[0054] In some specific embodiments, the speed at which oil flows out of and into the first control chamber 404 or the second control chamber 405 can be changed by the fifth control valve 62, so as to control the speed of the reciprocating motion of the piston 41, thereby controlling the pressure magnitude and the period of pressure fluctuation.

[0055] It should be noted that the hydraulic oil source 61 has an oil collection tray installed at the bottom and an inlet and outlet vent at the top; the hydraulic oil source 61 specifically includes components such as a main pump, a circulating pump, a motor, a filter, and valves to provide oil. The specific structure of the hydraulic oil source 61 is in the prior art and will not be described in detail here.

[0056] In some specific embodiments, the system also includes a medium oil tank 1, a first overflow valve 91, a second overflow valve 92, and a third overflow valve 93. The first overflow valve 91 is installed on the pipeline between the medium oil tank 1 and the one-way valve 5; the second overflow valve 92 is installed on the pipeline between the fourth control valve 111 and the medium oil tank 1; and the inlet and outlet ends of the third overflow valve 93 are respectively connected to the outlet end 212 and the inlet end 211 of the first integrated cooling and heating unit.

[0057] In some specific embodiments, a first overflow pipe 911 is provided between the output end of the pump body 12 and the medium oil tank 1. A first overflow valve 91 is provided on the first overflow pipe 911. The first overflow valve 91 is configured to only allow the test medium to flow from the output end of the pump body 12 to the medium oil tank 1. Thus, when the pressure of the test medium at the output end of the pump body 12 is too high, part of the test medium can flow back to the medium oil tank 1 through the first overflow valve 91. When the second overflow valve 92 allows the test medium to flow back, the gas cylinder outlet end 1002 and the fourth control valve 111 still have a certain amount of test medium, and it will not all flow back to the medium oil tank 1, so that the pipeline where the gas cylinder outlet end 1002 and the fourth control valve 111 are located maintains a certain pressure. A second overflow pipe 931 is provided between the inlet end 211 and the outlet end 212 of the first integrated cooling and heating unit. The second overflow pipe 931 is equipped with a third overflow valve 93. The third overflow valve 93 is configured to allow the heat exchange medium to flow directly from the inlet end 211 to the outlet end 212 of the first integrated cooling and heating unit. Thus, when the pressure of the heat exchange medium at the inlet end 211 of the first integrated cooling and heating unit is too high, it will flow directly through the second overflow pipe 931 to the outlet end 212 of the first integrated cooling and heating unit without passing through the second heat exchanger 23, thereby providing protection for the second heat exchanger 23.

[0058] In some specific embodiments, the system also includes a pump body 12, a pressure sensor 71, and a temperature sensor 72. The pump body 12 is installed on the pipeline between the input end of the pressure pulse generating device and the medium oil tank 1. Pressure sensors 71 are installed at both the output end of the pump body 12 and the output end of the pressure pulse generating device. Temperature sensors 72 are installed in the inner cavity of the medium oil tank 1, at the output end of the pressure pulse generating device, and at the gas cylinder inlet 1001. Specifically, a pump body 12 is installed on the pipeline between the one-way valve 5 and the medium oil tank 1. The pump body 12 is used to transport the test medium from the medium oil tank 1 to the one-way valve 5, thereby providing a certain power for the transport of the test medium. Based on the reading of the pressure sensor 71 at the output end of the pressure pulse generating device, the controller controls the frequency of state changes of the fifth control valve 62 to control the pressure magnitude and the period of pressure fluctuation. Based on the readings of each temperature sensor 72, the controller controls the output temperature of the first integrated heating and cooling unit 21 and the ambient temperature control device 32 to meet the temperature requirements of the test.

[0059] In some specific embodiments, temperature sensors 72 are also provided inside the gas cylinder 100, the inner cavity 311 of the environmental chamber, and the environment in which the pressure pulse test bench of the gas cylinder 100 is located.

[0060] In some specific embodiments, the fourth control valve 111 is a pneumatic control valve. The fifth control valve 62 is a servo control valve.

[0061] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A gas cylinder pressure pulse testing system, characterized in that: It includes a first heat exchanger, a second heat exchanger, and a first integrated cooling and heating unit, wherein: The first heat exchanger has a first test medium channel and a first heat exchange medium channel; the first test medium inlet end of the first test medium channel is used to connect to the output end of the pressure pulse generating device. The second heat exchanger has a second test medium channel and a second heat exchange medium channel; the first test medium outlet end of the first test medium channel is connected to the second test medium inlet end of the second test medium channel, and the second test medium outlet end of the second test medium channel is used to connect to the gas cylinder inlet end; the test medium output by the pressure pulse generating device can pass through the first test medium channel and the second test medium channel in sequence and enter the gas cylinder; The first cooling and heating integrated unit's first cooling and heating integrated unit outlet end is connected to the second heat exchange medium inlet end of the second heat exchange medium channel. The first cooling and heating integrated unit's first cooling and heating integrated unit inlet end is connected to the first heat exchange medium outlet end of the first heat exchange medium channel. The second heat exchange medium outlet end is connected to the first heat exchange medium inlet end. The heat exchange medium in the first cooling and heating integrated unit can sequentially pass through the first cooling and heating integrated unit outlet end, the second heat exchange medium inlet end, the second heat exchange medium outlet end, the first heat exchange medium inlet end, the first heat exchange medium outlet end, and the first cooling and heating integrated unit inlet end to form a heat exchange cycle. The test medium flowing through the second test medium channel can exchange heat with the heat exchange medium flowing through the second heat exchange medium channel. The test medium flowing through the first test medium channel can exchange heat with the heat exchange medium flowing through the first heat exchange medium channel. It also includes an environmental chamber and an environmental temperature control device. The environmental chamber has an inner cavity for placing the gas cylinder. The inner cavity is filled with an environmental medium. The environmental temperature control device is used to adjust the temperature of the environmental medium. It also includes a first control valve, a second control valve, and a third control valve. The first control valve is installed on the pipeline between the outlet end of the first test medium and the inlet end of the second test medium. The connection point on the connecting pipeline to the return pipeline is a side wall connection point. The second control valve is installed on the return pipeline and is located between the outlet end of the gas cylinder and the side wall connection point. The third control valve is installed on the connecting pipeline. It also includes a fourth control valve, which is disposed on the return pipeline and between the side wall connection point and the medium oil tank; The second overflow valve is installed on the pipeline between the fourth control valve and the medium tank; when the second overflow valve causes the test medium to flow back, the gas cylinder outlet and the pipeline where the fourth control valve is located maintain a certain pressure.

2. The gas cylinder pressure pulse testing system according to claim 1, characterized in that: It also includes a pressure pulse generating device, the input end of which is connected to the medium tank, and the output end of which is connected to the inlet end of the first test medium.

3. The gas cylinder pressure pulse testing system according to claim 2, characterized in that: It also includes a gas cylinder, a connecting pipeline, and a return pipeline. The inlet end of the gas cylinder is connected to the outlet end of the second test medium. One end of the return pipeline is connected to the outlet end of the gas cylinder, and the other end of the return pipeline is connected to the medium tank. One end of the connecting pipeline is connected to the return pipeline, and the other end of the connecting pipeline is connected to the pipeline between the outlet end of the first test medium and the inlet end of the second test medium.

4. The gas cylinder pressure pulse testing system according to claim 1, characterized in that: The pressure pulse generating device includes at least one pulse booster. Each pulse booster includes a body, a sleeve, and a piston. The piston includes a first piston and a second piston. The diameter of the first piston is larger than the diameter of the second piston. A first end face of the first piston is fixedly connected to a second end face of the second piston. The sleeve is fitted inside the body, and the outer wall of the sleeve is fixedly connected to the inner wall of the body. The first piston is fitted inside the body, and the outer wall of the first piston is slidably connected to the inner wall of the body. The end of the second piston away from the first piston is fitted inside the sleeve and slidably connected to the sleeve. The second end face of the first piston, a portion of the inner wall of the body, and the first inner end wall of the body form a first control cavity. A high-pressure oil chamber is formed by the first end face, a portion of the inner sidewall of the body, and the second inner end wall of the body; a second control chamber is formed by the second end face of the second piston, a portion of the outer sidewall of the second piston, a portion of the inner sidewall of the body, and the end face of the sleeve near the first piston; the body is provided with an oil inlet and an oil outlet communicating with the high-pressure oil chamber, the oil outlet being the output end of the pressure pulse generating device, and the oil inlet being the input end of the pressure pulse generating device. By introducing oil into the first control chamber and discharging the oil in the second control chamber, the piston can move in a first direction; by introducing oil into the second control chamber and discharging the oil in the first control chamber, the piston can move in a second direction, the first direction and the second direction being opposite directions.

5. The gas cylinder pressure pulse testing system according to claim 4, characterized in that: The pressure pulse generating device further includes a hydraulic oil source, a one-way valve, and two fifth control valves. There are two pulse boosters, and each fifth control valve corresponds to one of the pulse boosters. Each fifth control valve is connected to the hydraulic oil source, the corresponding first control chamber, and the corresponding second control chamber. The inlet end of the one-way valve is used to connect and communicate with the medium oil tank, and the outlet end of the one-way valve is connected and communicated with the oil inlet ends of the two pulse boosters.

6. The gas cylinder pressure pulse testing system according to claim 5, characterized in that: It also includes a medium oil tank, a first overflow valve, a second overflow valve, and a third overflow valve. The first overflow valve is installed on the pipeline between the medium oil tank and the one-way valve. The inlet and outlet of the second overflow valve are respectively connected to the outlet of the first integrated cooling and heating unit and the inlet of the first integrated cooling and heating unit.

7. The gas cylinder pressure pulse testing system according to claim 2, characterized in that: It also includes a pump body, a pressure sensor, and a temperature sensor. The pump body is installed on the pipeline between the input end of the pressure pulse generating device and the medium oil tank. Pressure sensors are installed at the output end of the pump body and the output end of the pressure pulse generating device. Temperature sensors are installed in the inner cavity of the medium oil tank, at the output end of the pressure pulse generating device, and at the inlet end of the gas cylinder.

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