Explosion-proof high temperature aging test chamber

Abstract

An explosion-proof high-temperature aging test chamber includes a test chamber with a sealed connection to an explosion-proof exhaust device for releasing high pressure inside the test chamber. The explosion-proof exhaust device includes an explosion-proof structure on the inner wall of the test chamber, a sealing structure at one end of the explosion-proof structure, and an exhaust structure on the outer casing of the test chamber. The explosion-proof structure includes an explosion-proof box, an explosion-proof pressure valve inside the explosion-proof box, a control module that controls the pressure release of the explosion-proof pressure valve via an electromagnetic module, and a pressure sensor on the outer wall of the explosion-proof box. The explosion-proof pressure valve is equipped with a rupture disc assembly, which assists the exhaust structure in releasing instantaneous high pressure generated inside the test chamber. This invention employs a dual pressure relief mode: when the pressure exceeds a safety threshold, an active pressure relief mode is activated; when the pressure instantaneously exceeds 96% of the threshold, the thin rupture disc ruptures instantly upon overpressure, forming a direct exhaust channel. The dual channels improve pressure relief efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of aging test chambers, and specifically to an explosion-proof high-temperature aging test chamber. Background Technology

[0002] Explosion-proof high-temperature aging test chambers are mainly used to simulate high-temperature environments and conduct aging tests on products. This test helps to evaluate the performance stability, durability, and potential safety risks of products under high-temperature conditions. The "explosion-proof" characteristic indicates that the test chamber has the ability to operate safely in a potentially explosive environment, which is usually related to flammable and explosive gases or vapors that may be generated inside the test chamber.

[0003] The explosion-proof structure in the explosion-proof exhaust device is the core component that ensures the safe operation of the sealed experimental device. Its main function is to respond quickly and activate the pressure relief mechanism when overpressure occurs inside the experimental device due to the explosion of the test sample, uncontrolled chemical reaction, or abnormal increase in temperature and pressure. When the pressure reaches the preset threshold, the explosion-proof structure will rupture or open instantly to form a pressure relief channel, which will quickly discharge the high-pressure gas or flame inside the device, thereby effectively preventing the experimental device from rupturing or undergoing a secondary explosion due to overpressure. Summary of the Invention

[0004] The purpose of this invention is to provide an explosion-proof high-temperature aging test chamber to prevent experimental devices from rupturing or experiencing secondary explosions due to overpressure. Through an "active and passive" dual-mode pressure relief system, when the pressure sensor detects that the pressure exceeds the safety threshold, the control module immediately activates the active pressure relief mode, driving the motor to rotate the ball valve switch, creating a flow channel between the through-hole and the second pressure relief chamber for pressure relief. When the pressure instantaneously exceeds 96% of the threshold, the thin rupture disc ruptures instantly, forming a direct exhaust channel. This dual-channel design improves pressure relief efficiency. During the pressure relief process, the gas passes through a high-efficiency filter for harmless discharge, significantly reducing secondary risks. The threaded connection between the rupture cylinder and the explosion-proof box greatly shortens the rupture disc replacement time.

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

[0006] An explosion-proof high-temperature aging test chamber includes a test chamber sealed to an explosion-proof exhaust device. This device releases high pressure within the test chamber when the pressure reaches or exceeds a safety threshold. The explosion-proof exhaust device includes an explosion-proof structure on the inner wall of the test chamber, a sealing structure at one end of the explosion-proof structure, and an exhaust structure on the outer casing of the test chamber. The explosion-proof structure rapidly responds and activates a pressure relief mechanism. The sealing structure connects the explosion-proof structure and the exhaust structure and is sealed to the test chamber. The exhaust structure vents air to reduce the pressure or concentration within the test chamber. The explosion-proof structure includes an explosion-proof box, an explosion-proof pressure valve within the explosion-proof box, a control module that controls the pressure relief of the explosion-proof pressure valve via an electromagnetic module, and a pressure sensor on the outer wall of the explosion-proof box. The explosion-proof pressure valve is equipped with a rupture disc assembly, which assists the exhaust structure in releasing the instantaneous high pressure generated within the test chamber.

[0007] The explosion-proof air pressure valve includes a first pressure relief chamber located in the valve body. One end of the first pressure relief chamber has an internal thread on its inner side wall, and the other end is connected to the exhaust structure through a sealing structure.

[0008] The rupture disc assembly includes a rupture tube with openings at both ends and a rupture disc disposed in one of the openings of the rupture tube, the rupture disc serving as a final pressure relief layer in extreme circumstances.

[0009] The blasting cylinder has an external thread at one end, and the blasting cylinder is threadedly connected to the internal thread of the first pressure relief chamber through the external thread.

[0010] The sealing structure includes sealing plates disposed on the inner and outer sides of the test chamber and at least one sealing element disposed between the sealing plates and the test chamber.

[0011] The exhaust structure includes an exhaust pipe fixedly connected to the sealing structure, a filter located at one end of the exhaust pipe, and a tailpipe located on one side of the filter.

[0012] One end of the exhaust pipe forms an exhaust chamber, and the filter is installed inside the exhaust chamber.

[0013] The filter includes at least one first filter layer, at least one catalytic conversion layer disposed on one side of the first filter layer, and at least one second filter layer disposed on the other side of the catalytic conversion layer. The first filter layer is used to perform initial filtration on the exhaust gas, the catalytic conversion layer is used to convert the exhaust gas, and the second filter layer is used to perform re-filtration on the converted gas.

[0014] The catalytic conversion layer is equipped with an ultraviolet lamp assembly, which is used to assist the catalytic conversion layer in converting and expelling gases.

[0015] The beneficial effects of this utility model are as follows:

[0016] When the pressure sensor detects that the pressure inside the chamber exceeds the safety threshold or momentarily exceeds 96% of the threshold, the rupture disc assembly, threadedly connected to the first pressure relief chamber, ruptures instantly upon overpressure, forming a direct exhaust channel. After the electromagnetic pressure relief module is activated, a dual-channel pressure relief system is created, connecting the second pressure relief chamber and the exhaust structure. This allows the gas to be introduced into the exhaust pipe through the sealed structure, undergoes initial filtration by the first filter layer, and then enters for deep purification by the UV lamp assembly and catalytic conversion layer. Finally, it is filtered through the second filter layer and discharged harmlessly. This not only avoids secondary accidents caused by the leakage of harmful gases but also prevents convective contamination between the test samples inside the chamber and the outside air through physical isolation. Furthermore, the rupture cylinder and sealing structure support rapid replacement and maintenance, significantly improving experimental continuity and equipment reuse efficiency. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention.

[0018] Figure 2 This is a perspective view of the explosion-proof exhaust device of this utility model.

[0019] Figure 3 This is one of the perspective views of the explosion-proof structure of this utility model.

[0020] Figure 4 This is the second perspective view of the explosion-proof structure of this utility model.

[0021] Figure 5 This is an assembly drawing of the explosion-proof structure of this utility model.

[0022] Figure 6 This is a perspective view of the sealing structure of this utility model.

[0023] Figure 7 This is one of the perspective views of the exhaust structure of this utility model.

[0024] Figure 8 This is the second perspective view of the exhaust structure of this utility model.

[0025] Figure 9 This is an exploded view of the filter of this utility model.

[0026] Explanation of icon numbers:

[0027] 1-Test chamber, 2-Explosion-proof exhaust device, 3-Explosion-proof structure, 30-Explosion-proof box, 31-Explosion-proof air pressure valve, 310-Valve body, 311-First pressure relief chamber, 3110-Internal thread, 312-Second pressure relief chamber, 313-Rupture disc assembly, 3130-Rupture cylinder, 31300-External thread, 3131-Rupture disc, 32-Control module, 320-Electromagnetic module, 321-Drive motor, 322-Switch unit, 33-Pressure sensor, 4-Sealing structure, 40-Sealing plate, 41-Sealing element, 5-Exhaust structure, 50-Exhaust pipe, 500-Exhaust chamber, 51-Filter, 510-First filter layer, 511-Catalytic conversion layer, 512-UV lamp assembly, 513-Second filter layer, 52-Tail exhaust pipe. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figure 1-9 As shown, this utility model relates to an explosion-proof high-temperature aging test chamber, including a test chamber 1. The test chamber 1 is sealed to an explosion-proof exhaust device 2. The explosion-proof exhaust device 2 is used to release the high pressure inside the test chamber 1 when the pressure reaches or exceeds a safety threshold. The explosion-proof exhaust device 2 includes an explosion-proof structure 3 on the inner wall of the test chamber 1, a sealing structure 4 at one end of the explosion-proof structure 3, and an exhaust structure 5 on the outer casing of the test chamber 1. The explosion-proof structure 3 is used to quickly respond and activate the pressure relief mechanism. The sealing structure 4 is used to connect the explosion-proof structure 3 and the exhaust structure 5 and is sealed to the test chamber 1. The exhaust structure 5 is used to exhaust air to reduce the pressure or concentration inside the test chamber 1. The explosion-proof structure 3 includes an explosion-proof box 30, an explosion-proof air pressure valve 31 inside the explosion-proof box 30, a control module 32 that controls the pressure relief of the explosion-proof air pressure valve 31 through an electromagnetic module 320, and a pressure sensor 33 on the outer wall of the explosion-proof box 30. The pressure sensor 33 is used to sense... The pressure sensor 33 is electrically connected to the control terminal to control the pressure inside the test chamber 1. The explosion-proof gas pressure valve 31 is equipped with a rupture disc assembly 313, which is used to assist the exhaust structure 5 in releasing the instantaneous high pressure generated inside the test chamber 1. In use, the explosion-proof exhaust device 2 is initially in a closed state. During the aging test, if the test sample (such as a lithium battery) explodes or generates a large amount of gas, causing the pressure inside the test chamber 1 to rise, when the rate of pressure increase is within the feedback rate of the pressure sensor 33, the control terminal will send a command to the explosion-proof structure 3 to start the active pressure relief mode based on the feedback data of the pressure sensor 33. When the pressure rises to 80-95% of the safe value, the control terminal will release the gas to reduce the pressure inside the test chamber 1, thereby protecting the test chamber 1. When the pressure inside the test chamber 1 instantly rises to more than 96% of the safe value, and the pressure sensor 33 cannot provide timely feedback data, the explosion-proof structure 3 will automatically enter the passive pressure relief mode.

[0030] like Figure 2-5 As shown, the explosion-proof gas pressure valve 31 includes a first pressure relief chamber 311 disposed within the valve body 310. One end of the first pressure relief chamber 311 has an internal thread 3110 on its inner wall, and the other end is connected to the exhaust structure 5 via a sealing structure 4. The explosion-proof gas pressure valve 31 also includes a second pressure relief chamber 312 disposed on one side of the first pressure relief chamber 311. In active pressure relief mode, the control module 32 opens the exhaust channel, allowing the gas inside the test chamber 1 to be exhausted to the outside through the second pressure relief chamber 312 and the exhaust structure 5, thereby reducing the pressure inside the test chamber 1. The control module 32 includes an electromagnetic module 320 with an integrated microprocessor, a drive motor 321 disposed on the surface of the valve body 310, and a switch 322 at the output end of the drive motor 321. The electromagnetic module 320 is electrically connected to the control terminal, and the drive motor 321 is electrically connected to the electromagnetic module 320. One end of the switch part 322 is a sphere with a diameter larger than the aperture of the second pressure relief chamber 312. The second pressure relief chamber 312 has a corresponding cavity of equal volume to the sphere, which fits perfectly without leakage. The sphere can also rotate within the cavity. The sphere of the switch part 322 has a through hole with a diameter no larger than the aperture of the second pressure relief chamber 312. The through hole can cooperate with the second pressure relief chamber 312 to form a flow channel. The other end of the switch part 322 is a cylinder that passes through the side wall of the second pressure relief chamber 312 and is rigidly connected to the output end of the drive motor 321. During normal experimentation, the flow channel is closed (the through hole is perpendicular to the second pressure relief chamber 312). Conversely, when the microprocessor controls the drive motor 321 to drive the switch part 322 so that the through hole is aligned with the second pressure relief chamber 312, the pressure relief is open.

[0031] like Figure 4-5As shown, the rupture disc assembly 313 includes a rupture cylinder 3130 with openings at both ends and a rupture disc 3131 disposed in one of the openings of the rupture cylinder 3130. The rupture disc 3131 serves as a final pressure relief layer in extreme situations. The rupture disc 3131 is a thin steel sheet or other metal sheet that ruptures when a certain pressure value is reached, with a thickness of 0.05~0.5mm. One end of the rupture cylinder 3130 is provided with an external thread 31300, and the rupture cylinder 3130 is connected to the internal thread of the first pressure relief chamber 311 through the external thread 31300. The rupture disc 3131 and the rupture cylinder 3130 can be interference-fitted or snap-fitted to form a sealed structure. In passive pressure relief mode, if the pressure value inside the test chamber 1 instantaneously exceeds 96% of the safety value, the rupture disc 3131 will be instantly crushed by the pressure, connecting the first pressure relief chamber 311 to the exhaust structure 5. The gas inside the test chamber 1 is then discharged through the first pressure relief chamber 311 and the exhaust structure 5, reducing the internal pressure of the test chamber 1. Furthermore, when the feedback data from the pressure sensor 33 reaches the control terminal, the active pressure relief mode will be activated. Simultaneous exhaust from the first pressure relief chamber 311 and the second pressure relief chamber 312 allows for a faster restoration of normal pressure within the test chamber 1. The filter 51 within the exhaust structure 5 filters and catalytically converts the exhaust gas, reducing the concentration of harmful gases and preventing secondary accidents. Furthermore, once the pressure returns to normal, the filter 51 ensures that the pressure inside the test chamber 1 remains at a level no lower than the external pressure. This is because the filter layer in the filter 51 utilizes the pressure difference—with the internal pressure higher than the external pressure—to open the flow channels of the filter layer. Only when the filter layer is closed can a channel for gas exhaust be created. Otherwise, the flow channels on the filter layer are closed. Therefore, when the pressure inside the chamber is equal to that outside, the inside and outside of the chamber are separated by the filter layer, and the gas cannot freely generate convection. Thus, the filter 51 can also prevent the test sample inside the chamber from coming into contact with the outside air and causing secondary threats. When maintaining the rupture disc assembly 313 in the later stage, it is not necessary to disassemble the explosion-proof exhaust device 2 as a whole. Just rotate and unscrew the rupture cylinder 3130, replace the rupture disc 3131, and then screw the rupture cylinder 3130 back on. Maintenance is convenient and quick.

[0032] like Figure 5 As shown, the sealing structure 4 includes a sealing plate 40 disposed on the inner and outer sides of the test chamber 1 and at least one sealing element 41 disposed between the sealing plate 40 and the test chamber 1. One side of the sealing plate 40 is sealed to the explosion-proof box 30 by sealant. The sealing element 41 can be a rubber sealing layer or a silicone sealing layer. The sealing plate 40 is provided with a vent hole that connects to the first pressure relief chamber 311 and the second pressure relief chamber 312 respectively. The sealing structure 4 is used to completely seal the connection between the explosion-proof exhaust device 2 and the test chamber, so that the normal experimental environment inside the test chamber 1 is not disturbed by the explosion-proof exhaust device 2.

[0033] like Figure 1 ,6 As shown in Figure 9, the exhaust structure 5 includes two exhaust pipes 50 fixedly connected to the sealing structure 4, a filter 51 disposed at one end of the two exhaust pipes 50, and a tailpipe 52 disposed on one side of the filter 51. One end of the two exhaust pipes 50 forms an exhaust chamber 500. The exhaust pipes 50 communicate with the vent hole. The filter 51 is installed inside the exhaust chamber 500. The tailpipe 52 passes through the exhaust chamber 500. Gas enters from the test chamber through the explosion-proof pressure valve 31, through the vent hole on the sealing plate 40, and into the chamber. The exhaust pipe 50 leads to the exhaust chamber 500, where it is filtered by the filter 51 before being discharged through the tailpipe. The filter 51 includes at least one first filter layer 510, at least one catalytic conversion layer 511 disposed on one side of the first filter layer 510, and at least one second filter layer 513 disposed on the other side of the catalytic conversion layer 511. The first filter layer 510 is used for initial filtration of the exhaust gas, the catalytic conversion layer 511 is used to convert the exhaust gas, and the second filter layer 513 is used to further filter the converted gas. Further filtration is performed within the catalytic conversion layer 511, which is equipped with an ultraviolet lamp assembly 512. This ultraviolet lamp assembly 512 works in conjunction with the catalytic conversion layer 511 to convert the gas to be discharged. Ultraviolet light excites the catalyst in the catalytic conversion layer 511 to generate highly active substances, driving the oxidation-reduction reaction to achieve gas purification. The ultraviolet lamp assembly 512 emits ultraviolet light of specific wavelengths (such as 185nm and 254nm). After its energy is absorbed by the catalyst (such as titanium dioxide TiO2), it can react with oxygen molecules and water molecules adsorbed on the catalyst surface to generate strong oxidizing substances such as superoxide radicals (O2⁻) and hydroxyl radicals (·OH). Some gas molecules directly absorb ultraviolet light and undergo photolysis, breaking chemical bonds to generate small molecular fragments. The catalytic conversion layer 511 acts as a reaction carrier, and its surface is densely covered with active sites that adsorb gas molecules, allowing them to fully contact with free radicals or photogenerated charge carriers. Volatile organic compounds (VOCs) are attacked by hydroxyl radicals and gradually oxidized and decomposed into carbon dioxide and water, improving purification efficiency.

[0034] After the experiment is completed, due to the influence of high temperature and other experimental environment, the pressure inside the chamber is generally high. If the chamber door is opened rashly, there may be risks such as hot air gushing out and causing burns. Therefore, commands can be input to control the explosion-proof exhaust device to start the active pressure relief mode for exhaust, eliminating the risk.

[0035] Working Principle: In active pressure relief mode, the explosion-proof exhaust device 2 of this explosion-proof high-temperature aging test chamber, based on the real-time monitoring of the pressure sensor 33 and the rapid response of the electromagnetic control system 32, triggers the electromagnetic pressure relief module 32 to execute a preset program when the pressure rise rate inside the test chamber 1 is within the sensor feedback threshold range and the pressure value reaches 80%-95% of the safety threshold. The control module 32 instantly opens the communication channel between the second pressure relief chamber 312 and the exhaust structure 5, allowing the gas inside the chamber to be introduced into the exhaust pipe 50 through the sealing structure 4. Pressure release and gas purification are achieved through the three-stage filtration consisting of the first filter layer 510, the ultraviolet lamp group 512, the catalytic conversion layer 511, and the second filter layer 513. At the same time, the filter 51 controls the opening and closing of the flow channel through the pressure difference, automatically blocking gas convection after pressure balance. When the pressure inside the chamber... When the pressure suddenly changes and exceeds 96% of the safety threshold, the explosion-proof exhaust device 2 automatically enters the passive pressure relief mode: the rupture disc assembly 313 is a mechanical protection device. Its rupture cylinder 3130 and the first pressure relief chamber 311 of the explosion-proof air pressure valve 31 are connected by threads to form a rigid sealing structure. When the pressure peak exceeds the pressure bearing limit of the rupture disc 3131, the rupture disc 3131 undergoes irreversible rupture, allowing the high-pressure gas to directly enter the exhaust structure 5 through the first pressure relief chamber 311. When the pressure value drops below 96% of the safety value, its active pressure relief mode will be activated, and exhaust will be carried out simultaneously through the first pressure relief chamber 311 and the second pressure relief chamber 312, so as to restore the pressure in the test chamber 1 to normal more quickly. The instantaneous high-pressure gas is quickly purified by the efficient filtration and catalytic conversion of the filter 51 until the pressure value drops back to below the safety range.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. Therefore, without departing from the design spirit of the present utility model, any equivalent changes or modifications made by those skilled in the art to the structure, features and principles of the present utility model should fall within the protection scope of the patent application of the present utility model.

Claims

1. An explosion-proof high-temperature aging test chamber, comprising a test chamber, characterized in that: The test chamber is sealed with an explosion-proof exhaust device. This explosion-proof exhaust device is used to release the high pressure inside the test chamber when the pressure reaches or exceeds a safety threshold. The explosion-proof exhaust device includes an explosion-proof structure on the inner wall of the test chamber, a sealing structure at one end of the explosion-proof structure, and an exhaust structure on the outer casing of the test chamber. The explosion-proof structure is used to respond quickly and activate the pressure relief mechanism. The sealing structure is used to connect the explosion-proof structure and the exhaust structure and to seal the test chamber. The exhaust structure is used to exhaust air to reduce the pressure or concentration inside the test chamber. The explosion-proof structure includes an explosion-proof box, an explosion-proof air pressure valve inside the explosion-proof box, a control module that controls the pressure relief of the explosion-proof air pressure valve through an electromagnetic module, and a pressure sensor on the outer wall of the explosion-proof box. The explosion-proof air pressure valve is equipped with a rupture disc assembly, which is used to assist the exhaust structure in releasing the instantaneous high pressure generated inside the test chamber.

2. The explosion-proof high-temperature aging test chamber according to claim 1, characterized in that: The explosion-proof air pressure valve includes a first pressure relief chamber located in the valve body. One end of the first pressure relief chamber has an internal thread on its inner side wall, and the other end is connected to the exhaust structure through a sealing structure.

3. The explosion-proof high-temperature aging test chamber according to claim 2, characterized in that: The rupture disc assembly includes a rupture tube with openings at both ends and a rupture disc disposed in one of the openings of the rupture tube, the rupture disc serving as a final pressure relief layer in extreme circumstances.

4. The explosion-proof high-temperature aging test chamber according to claim 3, characterized in that: The blasting cylinder has an external thread at one end, and the blasting cylinder is threadedly connected to the internal thread of the first pressure relief chamber through the external thread.

5. The explosion-proof high-temperature aging test chamber according to claim 1, characterized in that: The sealing structure includes sealing plates disposed on the inner and outer sides of the test chamber and at least one sealing element disposed between the sealing plates and the test chamber.

6. The explosion-proof high-temperature aging test chamber according to claim 1, characterized in that: The exhaust structure includes an exhaust pipe fixedly connected to the sealing structure, a filter located at one end of the exhaust pipe, and a tailpipe located on one side of the filter.

7. The explosion-proof high-temperature aging test chamber according to claim 6, characterized in that: One end of the exhaust pipe forms an exhaust chamber, and the filter is installed inside the exhaust chamber.

8. The explosion-proof high-temperature aging test chamber according to claim 6, characterized in that: The filter includes at least one first filter layer, at least one catalytic conversion layer disposed on one side of the first filter layer, and at least one second filter layer disposed on the other side of the catalytic conversion layer. The first filter layer is used to perform initial filtration on the exhaust gas, the catalytic conversion layer is used to convert the exhaust gas, and the second filter layer is used to perform re-filtration on the converted gas.

9. The explosion-proof high-temperature aging test chamber according to claim 8, characterized in that: The catalytic conversion layer is equipped with an ultraviolet lamp assembly, which is used to assist the catalytic conversion layer in converting and expelling gases.

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