A short-time domain flat test piece pressure relief test system

Abstract

A short-time domain flat test piece pressure relief test system, comprising a gas supply system, a large-diameter exhaust system, a container body system, a small-diameter exhaust system and a base system; the base system is used to carry the container body system; the flat test piece to be measured is installed in the container body system; both the large-diameter exhaust system and the small-diameter exhaust system are installed on the container body system and exhaust under different pressure conditions; when the small-diameter exhaust system is used for exhaust, the large-diameter exhaust system is closed, and the gas supply system conveys the gas into the container body system. After reaching the predetermined pressure, the small-diameter exhaust system exhausts; when the large-diameter exhaust system is used for exhaust, the small-diameter exhaust system is closed, and the gas supply system conveys the gas into the double-membrane section in the large-diameter exhaust system and the container body system at a fixed pressure ratio; after reaching the predetermined pressure, the large-diameter exhaust system exhausts.

Description

Technical Field

[0001] The present invention relates to a pressure relief test system for a short-time domain flat test piece, in particular to a test system for rapidly relieving pressure of a flat test piece under high and low pressure states in a short-time domain. Background Art

[0002] In certain model tests, there are often some important components working in harsh environments, and these important components themselves are often non-standard parts, which brings new challenges to the preliminary tests before model research and development. It is necessary to establish a new test system to meet the research and development requirements. Among them, the test pieces involve various backgrounds. They are both flat-shaped and need to measure various parameters of the test pieces themselves when relieving pressure in high-pressure or low-pressure environments, so as to evaluate the actual performance of the test pieces themselves. Therefore, it is practical and necessary to study a new test system, which will provide important data for test pieces of some important similar-shaped components during bullet chambering and instantaneous missile and rocket launches. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art and solve the pressure relief test problem of a short-time domain flat test piece.

[0004] The object of the present invention is achieved through the following technical solutions:

[0005] A pressure relief test system for a short-time domain flat test piece, comprising a gas supply system, a large-diameter exhaust system, a container body system, a small-diameter exhaust system and a base system;

[0006] The base system is used to carry the container body system; the flat test piece to be measured is installed in the container body system;

[0007] Both the large-diameter exhaust system and the small-diameter exhaust system are installed on the container body system and exhaust under different pressure conditions; among them, the small-diameter exhaust system is applicable to small pressures, and the large-diameter exhaust system is applicable to large pressures;

[0008] When using the small-diameter exhaust system to exhaust, the large-diameter exhaust system is closed, and the gas supply system conveys the gas to the container body system. After reaching the predetermined pressure, the small-diameter exhaust system exhausts;

[0009] When using the large-diameter exhaust system to exhaust, the small-diameter exhaust system is closed, and the gas supply system conveys the gas to the double-membrane section in the large-diameter exhaust system and the container body system at a fixed pressure ratio; after reaching the predetermined pressure, the large-diameter exhaust system exhausts; the exhaust mode of the large-diameter exhaust system is: the double-membrane section first relieves pressure, causing the diaphragm close to the container body system in the double-membrane section to rupture, and then the diaphragm far from the container body system in the double-membrane section ruptures to complete the exhaust.

[0010] Preferably, the gas supply system includes a pressure reducing valve and a distribution valve, the pressure reducing valve is used to reduce the gas pressure output by the gas supply system, and the distribution valve is used to output the gas pressure at a fixed pressure ratio.

[0011] Preferably, the small-caliber exhaust system uses a Mylar diaphragm, and uses heating to rupture the Mylar diaphragm to complete the exhaust.

[0012] Preferably, the large-diameter exhaust system further includes a double-membrane segment air release solenoid valve for relieving pressure in the double-membrane segment.

[0013] Preferably, the gas supply system includes a gas cylinder, a pressure reducing valve, a main gas circuit, a distribution valve, a double-membrane segment gas supply pipeline, and a container gas supply pipeline; the gas output from the gas cylinder first passes through the pressure reducing valve, and after passing through the main gas circuit, the distribution valve divides the high-pressure gas from the main gas circuit into two paths, one of which is the double-membrane segment gas supply pipeline, which has a higher pressure; the other is the container gas supply pipeline, which has a lower pressure.

[0014] Preferably, the large-diameter exhaust system also includes a second aluminum diaphragm, a first aluminum diaphragm, and a double-diaphragm segment air release solenoid valve; the large-diameter exhaust system discharges the gas in the double-diaphragm segment after the double-diaphragm segment air release solenoid valve is opened. Since the pressure difference on both sides of the first aluminum diaphragm rises sharply, at a certain moment, the first aluminum diaphragm bursts first; at this time, the air pressure in the double-diaphragm segment is the same as the air pressure in the container, the pressure difference on both sides of the second aluminum diaphragm rises sharply, and the second aluminum diaphragm quickly bursts.

[0015] Preferably, the container body system includes a container upper cover, a container pressure sensor, and a container lower chamber; under the premise that the container volume is fixed, the container upper cover and the container lower chamber are connected to form a rectangular cross-section cavity, and both the container upper cover and the container lower chamber are provided with T-shaped reinforcement ribs; the container body is provided with large-diameter exhaust holes and small-diameter exhaust holes, which are used to connect with the large-diameter exhaust system and the small-diameter exhaust system respectively; the container pressure sensor is used to monitor the pressure in the cavity.

[0016] Preferably, the small-diameter exhaust system includes a Mylar diaphragm, a constantan resistance wire, and a DC power supply; the small-diameter exhaust system uses a DC power supply to heat and fuse the Mylar diaphragm that has been subjected to air pressure to detonate. After the stabilized DC power supply starts the power switch, the constantan resistance wire is quickly heated, the Mylar diaphragm is instantly burned through, and the Mylar diaphragm quickly explodes.

[0017] Preferably, the base system includes a base plate, a connector, and a foundation; the base plate is divided into multiple parts, each of which contacts the foundation, effectively increasing the contact area; the connector is used to connect the base plate and the foundation.

[0018] Preferably, the pressure in the container body system can be released completely within 20ms, and the followability difference of the air pressure sensor in the container is within 0.002MPa.

[0019] The present invention has the following beneficial effects compared with the prior art:

[0020] (1) The present invention provides a pressure relief test system dedicated to special-shaped test pieces, namely flat test pieces. Different pressure relief methods are selected according to different pressure relief pressures. Tests have proved that the pressure in the container can be released within 20 ms, and the pressure relief speed is fast;

[0021] (2) The pressure relief test system provided by the present invention can solve the problem of stress concentration at the midpoints of the four sides of the rectangular cross-section cavity, and has good pressure-bearing performance;

[0022] (3) The pressure relief test system provided by the present invention combines the characteristics of realizing remote control to ensure the safety of test personnel and rapid explosion start control;

[0023] (4) When replacing different test pieces or conducting repetitive tests on test pieces in the present invention, the replacement is simple and the operation is convenient;

[0024] (5) After multiple test runs, the present invention sets different pressure sensors at different positions in the container. The difference in the followability of the air pressure sensors in the container is within 0.002 MPa, and the pressure followability is good;

[0025] (6) The present invention conducts blasting by processing grooves on the aluminum diaphragm or directly replacing the mylar diaphragm, with low test costs and good feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 is a schematic diagram of the structure of the air supply system in the present invention.

[0028] Figure 3 is a schematic diagram of the structure of the container body system in the present invention.

[0029] Figure 4 is a schematic diagram of the structure of the large-diameter exhaust system in the present invention.

[0030] Figure 5 is a schematic diagram of the small-diameter exhaust system in the present invention.

[0031] Figure 6 is a schematic diagram of the base system in the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0032] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will further describe in detail the embodiments of the present invention with reference to the accompanying drawings.

[0033] A short-time domain flat test piece pressure relief test system includes: a gas supply system, a container body system, a large-diameter exhaust system, a small-diameter exhaust system, and a base system. Those skilled in the art can flexibly choose to use the large-diameter exhaust system or the small-diameter exhaust system according to the high-pressure exhaust or low-pressure exhaust test. If the large-diameter exhaust system is used, the small-diameter exhaust system is blocked with a blind plate, and vice versa.

[0034] In the present invention, the gas supply system mainly includes a gas cylinder, a pressure reducing valve, a main gas pipeline, a distribution valve, a double-membrane section gas supply pipeline, a solenoid valve, a pressure gauge, a solenoid valve, a container gas supply pipeline, and a pressure gauge. The gas cylinder can select a suitable gas according to user needs (such as an air gas cylinder). The pressure reducing valve mostly uses a type with a pressure gauge to observe the pressure after decompression. The user can flexibly choose whether to use a hose or a well-fixed steel pipeline for the main gas pipeline according to the site or actual situation. The distribution valve adopts a three-way method to integrate the main gas pipeline, the container gas supply pipeline, and the double-membrane section gas supply pipeline, so that the gas passing through the main gas pipeline is transmitted to the double-membrane section gas supply pipeline and the container gas supply pipeline respectively at a pressure ratio of 1:2 through the distribution valve, thereby ensuring that the air pressure ratio in the double-membrane section and the container is always 1:2 before the membrane is broken.

[0035] In the present invention, the large-diameter exhaust system mainly includes a double-membrane section flange, a PTFE gasket, an aluminum diaphragm, a double-membrane section, a double-membrane section gas discharge pipeline, and a double-membrane section gas discharge solenoid valve. The inner and outer diameters of the PTFE gasket are the same as those of the double-membrane section flange, and bolt holes are opened on it. The large contact area and bolt holes can better play the role of sealing and clamping the aluminum diaphragm. The size of the aluminum diaphragm is the same as the outer diameter of the flange, and bolt holes are opened on it. Fixing and pressing the diaphragm can provide favorable conditions for observing the force condition of the part where the diaphragm contacts the air flow after the membrane is broken. The membrane-breaking principle of the large-diameter exhaust system is as follows: When the double-membrane section and the container are both filled to the established pressure, the pressure ratio between the two is 1:2. Through the double-membrane section gas discharge solenoid valve, after opening, the gas in the double-membrane section is quickly discharged. Due to the sharp rise in the pressure difference on both sides of the lower aluminum diaphragm, at a certain moment (this period is generally a few milliseconds), the lower aluminum diaphragm bursts first, and the first layer of membrane is broken. At this time, the air pressure in the double-membrane section is the same as that in the container, and the pressure difference on both sides of the upper aluminum diaphragm rises sharply to about twice that of the lower aluminum diaphragm. Since the upper aluminum diaphragm and the lower aluminum diaphragm have the same parameters, the aluminum diaphragm bursts quickly, and the second layer of membrane is broken. The gas in the double-membrane section is started by a solenoid valve in a safe, fast, and efficient manner. The good ductility of aluminum can withstand large deformations, so that after the flow field is started and the membrane cracks, a good petal shape is formed, which will not block the air flow discharge and has a great gain effect on the smooth discharge of the air flow.

[0036] In the present invention, the container body system mainly includes a container upper cover, a large-diameter exhaust hole, a container pressure sensor, a small-diameter exhaust hole, a stay bar, a lower container compartment, and a navigation socket. The large-diameter exhaust hole is generally used for high-pressure exhaust, and the small-diameter exhaust hole is generally used for low-pressure exhaust. Those skilled in the art can conventionally calculate the exhaust diameter based on the test pressure and the gas volume of the container. In terms of shape, on the premise of a fixed container volume requirement, the rectangular cross-section cavity formed by the container upper cover and the lower container compartment has a good gain effect on the adaptability to flat test pieces. In terms of structure, the midpoints of the four sides of the rectangular cross-section of the pressure vessel are often the points with the maximum stress. After various tests and corresponding calculation comparisons, the use of T-shaped stiffeners on the outer sides of the container upper cover and the lower container compartment can better balance the strength conditions of the container itself and the processability, while weakening and adjusting the stress concentration to below the allowable stress, taking into account the welding process and the integrity of the container. Due to the different exhaust start-up methods adopted for the large-diameter exhaust hole and the small-diameter exhaust hole due to the exhaust pressure, the large-diameter exhaust hole has a large exhaust pressure. The diaphragm for starting pressure relief can withstand a large pressure while still being safe and controllable, so the double-membrane method is adopted. The small-diameter exhaust hole has a small exhaust pressure, so the single-membrane method is adopted. The container uses four triangular stay bars. One side can be welded to the container, and the other side can be welded to the base to increase the overall stability of the container. Different types of navigation sockets can be set according to the number of sensors arranged by the user on the cable cover test piece, and data information interaction of the internal test piece can be realized through the navigation sockets. An exhaust pipe can be provided on the container, and a solenoid valve can be added to the pipeline, which can be used for exhaust when the container is overpressurized during inflation.

[0037] In the present invention, the small-diameter exhaust system mainly includes a PTFE gasket, a mylar diaphragm, a flange, a constantan resistance wire, a wire, and a regulated DC power supply. The inner and outer diameters of the PTFE gasket are the same as those of the flange, and bolt holes are also provided thereon. The size of the mylar diaphragm is the same as the outer diameter of the flange, and bolt holes are provided thereon. The constantan resistance wire can be bound to it using glue or tape. Threaded holes can be machined at both ends of the constantan resistance wire and connected to the wire through bolts. The regulated DC power supply outputs a regulated DC voltage. After multiple fusing tests, for a general mylar diaphragm, a power supply with an output of 20 A and 30 V can be selected to fuse the mylar film.

[0038] In the present invention, the base system mainly includes a base plate, a connecting member, and a foundation. To avoid the adverse effects caused by line contact due to the unevenness of the foundation or the base plate itself when the whole base plate is connected to the foundation, the base plate is designed to be in four parts and contact the foundation respectively, which can effectively increase the contact area and enhance the overall stability. The connecting member includes a nut, a gasket, a large washer, and an anchor bolt from top to bottom. The nut and the gasket are used together to prevent loosening. The large washer contacts the base plate to increase the contact surface, enabling the anchor bolt to play an effective supporting and fixing role. Concrete is poured into the foundation to tightly bond it with the anchor bolt. The holes processed on the base plate are oblong holes, which can be adjusted at any time when installing and fixing the position of the container. After adjustment, it is fixed with the connecting member, and secondary pouring is carried out in the holes to achieve overall fixation, improving the reliability and flexibility of the container connection.

[0039] As Figures 1 to 6 shown, a pressure relief test system for a short-time domain flat test piece includes a gas supply system 1, a large-diameter exhaust system 2, a container body system 3, a small-diameter exhaust system 4, and a base system 5. The container body system 3 is one of the core parts of the pressure relief test system.

[0040] The gas supply system 1 includes a gas cylinder 101, a pressure reducing valve 102, a main gas pipeline 103, a distribution valve 104, a double-membrane section gas supply pipeline 105, a solenoid valve 106, a pressure gauge 107, a solenoid valve 108, a container gas supply pipeline 109, and a pressure gauge 110, as Figure 2 shown. The distribution valve 104 is a 1 / 2 distribution valve, which combines the main gas pipeline, the container gas supply pipeline, and the double-membrane section gas supply pipeline, enabling the gas passing through the main gas pipeline to be transmitted to the double-membrane section gas supply pipeline and the container gas supply pipeline respectively at a pressure ratio of 1:2 through the distribution valve. The gas cylinder 101 and the pressure reducing valve 102 upstream of the distribution valve 104 are connected in sequence through the main gas pipeline 103. During the test process, the pressure value on the main gas pipeline can be controlled by adjusting the opening degree of the pressure reducing valve and observing the pressure gauge on the pressure reducing valve. The solenoid valve 106 and the pressure gauge 107 downstream of the distribution valve 104 are connected in sequence through the double-membrane section gas supply pipeline 105. The solenoid valve 106 can control the opening and closing of the gas supply in the double-membrane section, which is opened according to the established test procedure when using the large-diameter exhaust and closed when not using the large-diameter exhaust. The pressure gauge 107 can be observed nearby or remotely read its pressure value, and this pressure value is the pressure in the double-membrane section. The solenoid valve 108 and the pressure gauge 110 downstream of the distribution valve 104 are connected in sequence through the container gas supply pipeline 109. The solenoid valve 108 can control the opening and closing of the gas supply in the container, and the pressure gauge 110 can be observed nearby or remotely read its pressure value, and this pressure value is the pressure in the container.

[0041] The large-diameter exhaust system 2 includes a double-membrane section flange 201, a PTFE gasket 202, an aluminum diaphragm 203, a PTFE gasket 204, a double-membrane section 205, a PTFE gasket 206, an aluminum diaphragm 207, a PTFE gasket 208, a double-membrane section exhaust pipe 209, and a double-membrane section exhaust solenoid valve 210, as Figure 4 shown. The inner and outer diameters of the PTFE gasket are the same as those of the double-membrane section flange, and the size of the aluminum diaphragm is the same as the outer diameter of the flange. Bolt holes are provided on both the gasket and the diaphragm. Two sets of gaskets are placed above and below the double-membrane section 205. One set consists of a PTFE gasket 202, an aluminum diaphragm 203, and a PTFE gasket 204, which are placed in sequence from top to bottom. The PTFE gasket has a certain buffering effect to prevent excessive deformation of the aluminum diaphragm. The other set consists of a PTFE gasket 206, an aluminum diaphragm 207, and a PTFE gasket 208, with the same placement order and function as the above; the double-membrane section exhaust pipe 205 is connected to the double-membrane section exhaust solenoid valve 210 through the double-membrane section exhaust pipe 209. The double-membrane section exhaust solenoid valve 210 is used to control the start of the flow field during the large-diameter pressure relief test.

[0042] The container body system 3 includes a container upper cover 301, a large-diameter exhaust hole 302, a container pressure sensor 303, a small-diameter exhaust hole 304, a stay bar 305, a container lower cabin 306, and a navigation socket 307, as Figure 3 shown. The container upper cover 301 is provided with a large-diameter exhaust hole 302, a small-diameter exhaust hole 304, and a pressure sensor interface. The container pressure sensor 303 can be installed on the pressure sensor interface; the outside of the container upper cover 301 and the container lower cabin 306 is wrapped with a T-shaped stiffener; the container uses four triangular stay bars 305, one side of which can be welded to the container and the other side can be welded to the base; the navigation socket 307 can be set with different types of navigation plugs according to the number of sensors arranged by the user on the test piece, and data information interaction of the internal test piece can be realized through the navigation socket; an exhaust pipe can be set on the container, and a solenoid valve is added to the pipe, which can be used for exhaust when the container is overpressurized during inflation.

[0043] The small-diameter exhaust system 4 includes a PTFE gasket 401, a mylar diaphragm 402, a PTFE gasket 403, a flange 404, a constantan resistance wire 405, a wire 406, and a regulated DC power supply 407, as Figure 5 shown. The PTFE gasket 401, the mylar diaphragm 402, and the PTFE gasket 403 are placed in sequence under the flange 404. The constantan resistance wire is placed on the mylar diaphragm 402. The inner and outer diameters of the PTFE gasket are the same as those of the flange, and the size of the mylar diaphragm is the same as the outer diameter of the flange. Bolt holes are provided on both the gasket and the diaphragm; the constantan resistance wire can be bound to the mylar diaphragm with glue or tape; threaded holes are processed at both ends of the constantan resistance wire and connected to the wire through bolts; the regulated DC power supply outputs DC voltage regulation to the wire.

[0044] The base system 5 includes a base plate 501, a connectorFigure 6 As shown. The bottom plate is divided into four parts, which are respectively in contact with the foundation; the connecting piece includes a nut, a gasket, a large washer and an anchor bolt; concrete is poured in the foundation, and the holes processed on the bottom plate are oblong holes, which can be adjusted at any time when installing and fixing the container position. After adjustment, it is fixed with the connecting piece, and integral fixation is achieved by secondary pouring in the holes.

[0045] The working process of this test system is as follows:

[0046] Ensure that all solenoid valves can be opened and closed normally.

[0047] 1. Test operation process under the working condition of the small-diameter exhaust system

[0048] ① All operators wear safety helmets and take safety protection measures;

[0049] ② Connect the pressure sensor to the collector, and connect the collector to the computer;

[0050] ③ Stick the constantan resistance wire on the mylar diaphragm, and connect the lead wire to the DC power supply;

[0051] ④ Remove the blind plate of the small-diameter exhaust hole and install the mylar diaphragm with the constantan wire stuck;

[0052] ⑤ Seal the blind plate of the large-diameter exhaust hole and close the double-membrane section exhaust solenoid valve;

[0053] ⑥ Turn on data acquisition, observe the pressure in the container, open the container inlet valve, and slowly introduce gas;

[0054] ⑦ When the pressure in the container continues to increase to the test pressure, close the container inlet valve, adjust the DC power supply to 20A and 30V, turn on the heating switch, and start the flow field;

[0055] ⑧ The diaphragm has ruptured. Repeat this test once to test the repeatability;

[0056] ⑨ Conduct a test again. If the diaphragm can rupture, end the test.

[0057] 2. Test operation process under the working condition of the large-diameter exhaust system

[0058] ① All operators wear safety helmets and take safety protection measures;

[0059] ② Connect the pressure sensor to the collector, and connect the collector to the computer;

[0060] ③ Remove the blind plate of the large-diameter exhaust hole and install two aluminum diaphragms;

[0061] ④ Seal the blind plate of the small-diameter exhaust hole and the double-membrane section exhaust solenoid valve;

[0062] ⑤ Turn on data acquisition, open the intake valves of the double membrane section and the container, and slowly introduce gas at the same time;

[0063] ⑥ When the pressure in the double membrane section reaches the specified pressure and the pressure in the container reaches twice its pressure, close the intake valve of the double membrane section and the intake valve of the container;

[0064] ⑦ Open the exhaust valve of the double membrane section and start the flow field;

[0065] ⑧ The diaphragm ruptures. Observe the rupture state of the diaphragm, replace the diaphragm, and conduct a test again;

[0066] ⑨ Conduct a test again. If the diaphragm ruptures normally, end the test.

[0067] The content not described in detail in the specification of the present invention belongs to the well-known technology of those skilled in the art.

[0068] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solution of the present invention by using the methods and technical content disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. A short-time domain flat test piece pressure relief test system, characterized in that, Including air supply system, large-diameter exhaust system, container body system, small-diameter exhaust system and base system; The base system is used to support the container body system; the flat test piece to be tested is installed in the container body system; Both the large-diameter exhaust system and the small-diameter exhaust system are installed on the container body system, and are used to exhaust gas under different pressure conditions. The small-diameter exhaust system is suitable for low pressure, while the large-diameter exhaust system is suitable for high pressure. When the small-diameter exhaust system is used for exhaust, the large-diameter exhaust system is closed, and the gas supply system transmits the gas to the container body system. After reaching the predetermined pressure, the small-diameter exhaust system is exhausted; When the large-diameter exhaust system is used for exhaust, the small-diameter exhaust system is closed, and the air supply system transmits air to the double-diameter segment and the container system in the large-diameter exhaust system at a fixed pressure ratio. After reaching the predetermined pressure, the large-diameter exhaust system is exhausted. The large-diameter exhaust system exhausts air in the following manner: the double-diameter segment first releases pressure, causing the diaphragm in the double-diameter segment close to the container system to rupture, and then the diaphragm in the double-diameter segment far from the container system to rupture, completing the exhaust. The small-diameter exhaust system uses Mylar diaphragm, and uses heating to rupture the Mylar diaphragm to complete the exhaust.

2. The short-time domain flat test piece pressure relief test system according to claim 1, characterized in that, The gas supply system includes a pressure reducing valve and a distribution valve. The pressure reducing valve is used to reduce the gas pressure output by the gas supply system, and the distribution valve is used to output the gas pressure at a fixed pressure ratio.

3. The short-time domain flat test piece pressure relief test system according to claim 1, characterized in that The large-diameter exhaust system also includes a double-membrane section air release solenoid valve for relieving the pressure of the double-membrane section.

4. The short-time domain flat test piece pressure relief test system according to claim 1 or 3, characterized in that The gas supply system includes a gas cylinder, a pressure reducing valve, a main gas line, a distribution valve, a double-membrane segment gas supply line, and a container gas supply line; the gas output from the gas cylinder first passes through the pressure reducing valve, and after passing through the main gas line, the distribution valve divides the high-pressure gas from the main gas line into two lines, one of which is the double-membrane segment gas supply line with a higher pressure; the other is the container gas supply line with a lower pressure.

5. The short-time domain flat test piece pressure relief test system according to claim 1 or 2, characterized in that, The large-diameter exhaust system also includes a second aluminum diaphragm, a first aluminum diaphragm, and a dual-diaphragm section air release solenoid valve. After the dual-diaphragm section air release solenoid valve is opened, the large-diameter exhaust system discharges the gas in the double-diaphragm section. Due to the sharp increase in the pressure difference on both sides of the first aluminum diaphragm, at a certain moment, the first aluminum diaphragm bursts first. At this time, the air pressure in the double-diaphragm section is the same as the air pressure in the container, and the pressure difference on both sides of the second aluminum diaphragm rises sharply, causing the second aluminum diaphragm to quickly burst.

6. The short-time domain flat test piece pressure relief test system according to any one of claims 1 to 3, characterized in that, The container body system includes a container upper cover, a container pressure sensor, and a container lower cabin; under the premise that the container volume is fixed, the container upper cover and the container lower cabin are connected to form a rectangular cross-section cavity, and both the container upper cover and the container lower cabin are provided with T-shaped reinforcement ribs; the container body is provided with large-diameter exhaust holes and small-diameter exhaust holes, which are used to connect with the large-diameter exhaust system and the small-diameter exhaust system respectively; the container pressure sensor is used to monitor the pressure in the cavity.

7. The short-time domain flat test piece pressure relief test system according to any one of claims 1 to 3, characterized in that, The small-diameter exhaust system includes a Mylar diaphragm, a constantan resistance wire, and a DC power supply. The small-diameter exhaust system uses a DC power supply to heat and fuse the Mylar diaphragm that has been subjected to air pressure to initiate the explosion. After the regulated DC power supply starts the power switch, the constantan resistance wire is rapidly heated, the Mylar diaphragm is instantly burned through, and the Mylar diaphragm quickly explodes.

8. The short-time domain flat test piece pressure relief test system according to any one of claims 1 to 3, characterized in that, The base system includes a base plate, a connecting piece, and a foundation; the base plate is divided into multiple parts, each of which is in contact with the foundation, effectively increasing the contact area; the connecting piece is used to connect the base plate and the foundation.

9. The short-time domain flat test piece pressure relief test system according to any one of claims 1 to 3, characterized in that The pressure inside the container body system can be released completely within 20 ms, and the follow-up difference of the air pressure sensor inside the container is within 0.002 MPa.

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