Rapid pressure test method for filter

Abstract

The invention provides a rapid pressure test method for a filter. The rapid pressure test method comprises the following steps that a rapid pressure test system carries out self-inspection preparation; and the rapid pressure test system starts a pressure test according to the preset information and the logic program. The pressure testing test comprises the following steps: first pressure maintaining is started after the pressure is increased to the designed pressure of the filter for the first time, and the system starts pressure detection; after a preset condition 1 is met, carrying out secondary pressure increasing to test pressure, starting secondary pressure maintaining, and starting pressure detection by the system; after a preset condition 2 is met, the pressure is reduced for the first time to the designed pressure, then the pressure is maintained for the third time, and the system starts pressure detection; and after a preset condition 3 is met, pressure relief is started after manual detection confirmation, and a curve report is automatically generated after the pressure test is completed. According to the method, by setting a logic program, a pressure test is automatically carried out, which is safer and more reliable; the rapid pressure test system automatically detects data, and can store and file the data according to the number, thereby improving the working efficiency of product detection and traceability.

Description

Technical Field

[0001] The invention relates to the technical field of filtration and separation, and in particular to a rapid pressure testing method for a filter. Background Art

[0002] Pressure test is a test in which water, oil, gas and other media are injected into a container (or pipeline) and slowly pressurized to test its leakage, pressure resistance, damage, etc. It is also called pressure resistance (pressure) test (test). Pressure test can be used to check the sealing performance of the structure, the penetration defects of the welded joints in the pressure-bearing components and the strength of the structure, and it has the effect of reducing welding stress. The commonly used pressure test methods are mainly water pressure test, air pressure test and gas-liquid combined pressure test.

[0003] At present, about 50% of pressure tests are still in the traditional manual pressure test stage. In recent years, with the increasing application of automation in my country, some automatic pressure test systems have gradually emerged, but due to the lack of attention from various industries, most pressure test systems are limited to replacing traditional manual water inlet and pressure boosting. Although the automation level of pressure test operations has been improved to a certain extent, there is still a lot of room for improvement in terms of intelligence and refinement.

[0004] The filter pressure test system is mainly used in filter manufacturing, maintenance and daily inspection to ensure that the quality and performance of the filter meet the relevant standards and requirements. The pressure test system applies a certain pressure to the filter to detect its sealing, pressure resistance and pressure stability, thereby ensuring that the filter can operate normally in actual use. At present, when technicians perform pressure tests on filters, they basically use water pressure tests, that is, use a high-pressure pump to pump water into the filter. After the filter is filled with liquid, it continues to maintain for a certain period of time to detect whether there are any leaks in the filter. After the test is completed, the water in the filter can be drained to complete the pressure test. This method not only wastes water resources, but also the water pressure value is not easy to control. There will be differences in the pressure test environment of filters in the same batch, and the pressure test results cannot truly reflect the sealing and strength of the filter.

[0005] In view of this, it is necessary to improve the filter pressure testing system in the prior art to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to disclose a rapid pressure testing method for a filter, which separates the water supply and pressurization processes and uses a variable frequency pressure pump to achieve fine pressure adjustment, which not only effectively reduces the waste of water resources, but also achieves intelligent operation, which is safe and reliable; by automatically adjusting each step of the pressure testing process through a control module and performing it according to a preset logic, it can achieve intelligent testing and automatically generate a curve report.

[0007] To achieve the above object, the present invention provides a rapid pressure testing method for a filter, comprising the following steps:

[0008] (1) The rapid pressure test system is ready for self-test;

[0009] (2) The rapid pressure test system starts the pressure test according to the preset information and the set logic program, and records the data to generate a curve report;

[0010] Wherein, the pressure test comprises the following steps:

[0011] ① The pressure-boosting valve and pressure-boosting pump of the rapid pressure test system are automatically opened to increase the pressure to the filter design pressure for the first time, and then the pressure-boosting pump and pressure-boosting valve are closed to start the first pressure maintenance. At this time, the system automatically performs pressure detection;

[0012] ② After the preset condition 1 is met, the booster pump is turned on again to increase the pressure to the test pressure for the second time, and then the booster pump and the booster valve are turned off to start the second pressure maintenance. At this time, the system automatically performs pressure detection;

[0013] ③ After meeting the preset condition 2, the pressure relief valve opens and starts the first pressure reduction to the design pressure. Then the pressure relief valve closes and starts the third pressure maintenance. At this time, the system automatically performs pressure detection;

[0014] ④ After meeting the preset condition 3, after manual inspection and confirmation, open the pressure relief valve again to start the second pressure reduction to 0 and then close the pressure relief valve;

[0015] ⑤ After the pressure test is completed, the rapid pressure test system will reset itself and generate a curve report;

[0016] The logic program is as follows:

[0017] ①Preset condition 1: The first pressure holding is equal to the design pressure after pressure testing;

[0018] ②Preset condition 2: The second pressure holding is equal to the test pressure after pressure detection;

[0019] ③Preset condition 3: The third pressure holding is equal to the design pressure after pressure test;

[0020] If the preset conditions are met, the system will proceed automatically. If the preset conditions are not met, the system will activate the leakage alarm, prompt manual confirmation, and open the pressure relief valve to release pressure, thus terminating the pressure test.

[0021] In some embodiments, before the first pressure increase to the design pressure, another pressure increase process is set to first increase the pressure to 80% of the design pressure, and after the system self-checks and manually confirms that there is no leakage, the subsequent steps are continued.

[0022] In some embodiments, the preset information includes a pressure test location and a pressure test curve design.

[0023] In some embodiments, the pressure test curve includes a set pressure, a design pressure, a test pressure, a pressure relief pressure, a pressure holding time, and the number of pressure increases and pressure reliefs.

[0024] In some embodiments, the self-test preparation of the rapid pressure test system includes detecting whether the status of each valve and sensor is normal, and whether the liquid level of the pressurized water tank is greater than 40%.

[0025] In some embodiments, during the first pressure increase, when the test pressure reaches 80% of the set pressure, the boosting pump starts to change frequency and the pressure increase speed is reduced.

[0026] In some embodiments, the rapid pressure test system is provided with a second pressure sensor for detecting the pressure rise value of the filter and using it as a threshold value. When the threshold value exceeds the system set value, the pressure pump stops working and the pressure test is terminated.

[0027] In some embodiments, when the internal pressure of the filter is detected to be greater than 0.1 MPa or greater than the design pressure during drainage in the pressure test, the rapid pressure test system automatically opens the exhaust valve to exhaust.

[0028] Compared with the prior art, the present invention has the following beneficial effects: (1) the method automatically performs pressure test by setting logic program, which is safer and more reliable; (2) the rapid pressure test system automatically detects data, and can save and archive the data according to the number, thereby improving the efficiency of product inspection and traceability; (3) the rapid pressure test system is provided with two water tanks, one for water filling and the other for pressurization, so as to realize the recycling of water filling and the fine-tuning and controllable pressurization. A pressurized water tank is provided inside the rapid pressure test system to cope with a variety of scenarios; (4) the pressure pump changes frequency in time according to the test pressure to realize fine-tuning of pressure, which is safe and reliable; (5) automatic water filling and pressure discharge can quickly fill water and drain water. The filter is connected to the pressure test system through a rubber hose and a hydraulic quick-connect joint, which is suitable for batch inspection; (6) multiple control valves are connected in parallel, with a compact structure, and a pressure sensor is provided on the water inlet pipeline to be used as a safety valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the process flow of the rapid pressure testing system shown in the present invention;

[0030] Figure 2 The schematic diagram of the structure of the rapid pressure test system (1) shown in the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the rapid pressure test system shown in the present invention (2);

[0032] Figure 4 It is a schematic diagram of the internal pipeline structure of the rapid pressure test system shown in the present invention;

[0033] Figure 5 It is a logic flow chart of the rapid pressure testing method shown in the present invention;

[0034] Figure 6 This is a report curve diagram of the rapid pressure test method shown in the present invention

[0035] Figure 7 It is a report curve diagram of the rapid pressure test method shown in the present invention;

[0036] Explanation of the reference numerals in the accompanying drawings: 1. Raw water tank; 2. Water injection pump; 3. Water injection valve; 4. Drain valve; 5. Second flow sensor; 6. Liquid replenishment valve; 7. Pressurized water tank; 8. Pressure relief valve; 9. Liquid level sensor; 10. Pressurizing pump; 11. Pressurizing valve; 12. Drain valve; 13. Air storage tank; 14. Pressure exhaust valve; 15. Exhaust valve; 16. First flow sensor; 17. First pressure sensor; 18. Filter; 19. Rubber hose; 20. Second pressure sensor; 21. Temperature sensor; 22. Automatic exhaust valve; 23. Water inlet; 24. Water outlet; 25. Make-up water inlet; 26. Drain; 27. Control module; 28. Water inlet pipeline, 28.1. Pressure test interface. DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with the various embodiments shown in the accompanying drawings, but it should be noted that these embodiments are not limitations of the present invention, and any equivalent transformations or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these embodiments are all within the scope of protection of the present invention.

[0038] Example 1

[0039] like Figure 1-4 As shown, this embodiment provides a rapid pressure test system for a filter, comprising a water inlet module, a pressurizing module, an air source module, a filter 18 and a control module 27 connected in sequence; the water inlet pipe of the filter 18 is connected to the water inlet module and the pressurizing module, the water inlet module and the pressurizing module are connected in parallel, and the pressurizing module is used to pressurize and relieve the pressure of the liquid in the filter 18; the water outlet pipe of the filter 18 is connected to the air source module; the control module 27 is used to control the water inlet, pressurization, pressure maintenance, pressure relief and drainage actions of the filter 18.

[0040] The filter 18 is connected to the water inlet module and the pressurizing module air source module through a rubber hose 19.

[0041] The water inlet module includes a raw water tank 1, a water injection pump 2, a water injection valve 3, a drainage valve 4, and a second flow sensor 5 which are connected in sequence.

[0042] The pressurizing module includes a liquid replenishing valve 6, a pressurized water tank 7, a pressure relief valve 8, a liquid level sensor 9, a pressurizing pump 10, a pressurizing valve 11 and a drain valve 12 which are connected in sequence. An overflow port and an automatic exhaust valve 22 are provided on the pressurized water tank 7 to exhaust the pressurized water tank 7. When the rapid pressure test system is not used for a long time, the water inside it is discharged through the drain valve 12.

[0043] The gas source module includes a gas storage tank 13, a compression and exhaust valve 14, an exhaust valve 15, and a first flow sensor 16 which are connected in sequence.

[0044] The water injection valve 3, the drain valve 4, the pressure relief valve 8, and the pressurizing valve 11 are all connected to the water inlet of the filter 18. The pressure exhaust valve 14 and the exhaust valve 15 are connected to the water outlet of the filter 18 in parallel.

[0045] The water inlet of the filter 18 is also provided with a second pressure sensor 20 and a temperature sensor 21 .

[0046] The booster pump 10 is frequency-controlled and adjustable according to data from the first pressure sensor 17 .

[0047] The second pressure sensor 20 feeds back data to the control module 27 to control the operation and stop of the booster pump 10. The control module 27 is composed of a PLC, an industrial computer and an FBOX, and controls the rapid pressure test system to inject water, pressurize, maintain pressure, release pressure, and drain water, and automatically generates a curve report.

[0048] like Figure 2-3 As shown, the water inlet 23 and the water outlet 24, the water inlet 25 and the sewage outlet 26 of the rapid pressure test system are all hydraulic quick-connect joints. When working, the water inlet 23 and the water outlet 24 are connected to the external raw water tank 1 or other water sources, and the water inlet pipe of the filter 18 is connected to the pressure test interface 28.1.

[0049] like Figure 4 As shown, the rapid pressure test system has a compact structure and is equipped with an independent pressurized water tank 7 for pressure test. The pressure pump 10 realizes fixed frequency and variable frequency conversion. When the pressure in the filter 18 reaches 80% of the set pressure, the pressure pump 10 starts to change frequency. Since the test water source of the rapid pressure test system is divided into two parts: one is to fill the filter 18 with water from the raw water tank 1. This part of water is discharged into the raw water tank 1 for recycling after each pressure test, saving water resources; the other is to pressurize the filter 18 from the pressurized water tank 7. This part of water is mainly used to adjust the pressure, and the pressurized water tank 7 is located inside the rapid pressure test system to achieve flexible displacement, so it can work quickly during batch pressure tests. In addition, it can also be used when repairing filters, and the application scenarios are varied.

[0050] The rapid pressure test system in this embodiment can realize automatic water filling and drainage through the control module 27, can only detect the liquid level, synchronously control the flow rate, and realize soft control of the flow rate. The control module 27 can automatically generate the pressure test curve by operating its touch screen and inputting the pressure test curve parameters, and control the operation of the pressure test system, measure the pressure test process with high precision, and automatically generate and transmit the curve report. The module can also intuitively display the water injection amount in the filter 18.

[0051] Example 2

[0052] A rapid pressure testing method for a filter comprises the following steps:

[0053] (1) Water injection process:

[0054] Connect the quick pressure test system to the inlet and outlet of the filter 18, close the drain valve 4, the pressure valve 11, the pressure relief valve 8, and the pressure and exhaust valve 14, open the water injection valve 3 and the exhaust valve 15, and start the water injection pump 2 to start injecting water. When the flow rate monitored by the first flow sensor 16 reaches the water inlet flow rate, the pressurized water tank 7 starts to replenish liquid, and when the liquid level sensor 9 of the pressurized water tank 7 detects that the liquid level reaches 90%, the exhaust valve 15, the water injection valve 3 and the water injection pump 2 are closed.

[0055] (2) Pressurization and pressure-maintaining process:

[0056] Open the pressure-boosting valve 11, start the pressure-boosting pump 10, and increase the pressure according to the pressure-boosting curve set by the control module 27. When the value of the first pressure sensor 17 reaches the design pressure of the filter 18, the pressure-boosting valve 11 and the pressure-boosting pump 10 are closed, and the pressure-maintaining test is started. After the pressure-maintaining test is completed, open the pressure-boosting pump 10 and the pressure-boosting valve 11 again, and increase the pressure according to the set pressure-boosting curve. When the value of the first pressure sensor 17 reaches the test pressure, close the pressure-boosting pump 10 and the pressure-boosting valve 11, and start the second pressure-maintaining test. After the pressure-maintaining test is completed, open the pressure relief valve 8 to reduce the pressure. When the first pressure sensor 17 detects that the pressure in the filter 18 is about to reach the design pressure, close the pressure relief valve 8, and check the overall appearance of the filter 18, including the seals and welds.

[0057] It should be noted that the maximum test pressure (i.e., set pressure) is generally 1.25-1.8 times the design pressure. During the boosting process, when the test pressure reaches 80% of the set pressure, the boosting pump 10 starts to change frequency and the boosting speed is reduced to prevent pressure overshoot. During the boosting process, the second pressure sensor 20 monitors the pressure value online as a safety threshold for boosting. When the online pressure value exceeds the set value, the boosting pump 10 is shut down to ensure the safety and reliability of the entire boosting and pressure-maintaining process.

[0058] (3) Pressure relief process:

[0059] After the inspection is completed, the pressure relief valve 8 is opened to release the pressure. When the value of the first pressure sensor 17 is 0, the pressure relief valve 8 is closed to complete the pressure relief.

[0060] (4) Drainage process:

[0061] When the exhaust valve 15 is opened to the set time, the exhaust valve 15 is closed, the drain valve 4 and the pressure exhaust valve 14 are opened to drain water, and the pressure exhaust valve 14 is closed when the second flow sensor 5 detects that the flow rate is 0. During this pressure exhaust process, if it is detected that the gas pressure in the filter 18 exceeds 0.1MPa, the exhaust valve 15 needs to be opened in time to exhaust.

[0062] The rapid pressure testing system disclosed in this embodiment is not only used for water pressure testing of filters, but can also be used for pressure testing of any sealed container or tank.

[0063] Example 3

[0064] The rapid pressure test method for filtration provided in this embodiment is carried out using the device shown in Example 1, and the whole test can be automatically controlled and carried out, including the following steps:

[0065] (1) System self-inspection and quick pressure test to see if the system is in normal condition and all connections have been completed.

[0066] Specifically, the filter 18 is connected to the rapid pressure test system, and the control module 27 reads the preset pressure test information parameters and starts self-testing. The control module 27 self-checks whether the status of each valve and sensor is normal, and whether the liquid level of the pressurized water tank is greater than 40%. After the detection meets the conditions, manual confirmation is performed again, and the self-test process is completed.

[0067] Specifically, the self-test process also includes whether the filter 18 is fully connected to the pipe opening of the rapid pressure test system. In this embodiment, the pressure test interface 28.1 is provided with an electromagnetic sensor for detecting whether the contact signal is in place and transmitting it to the control module 27.

[0068] When the liquid level in the pressurized water tank is less than 40%, water can be replenished through an external pipeline.

[0069] (2) The rapid pressure test system starts the pressure test according to the preset information. The process is controlled by the control module 27 as follows: Figure 5 The logic diagram shown is automatically completed and the data is recorded to generate a report.

[0070] Specifically, the drain valve 4, the pressurizing valve 11, the pressure relief valve 8, and the pressure and exhaust valve 14 of the rapid pressure test system are all closed, and the water injection pump 2 and the water injection valve 3 are turned on to start injecting water into the filter 18. The first flow sensor 16 detects whether the filter 18 is filled with water. After the filter 18 is filled with water, the pressurized water tank 7 starts to automatically replenish the liquid. When the liquid level exceeds 90%, the exhaust valve 15 is closed, the water injection valve 3 is closed, the water injection pump 2 is closed, and the water injection process is completed.

[0071] The pressure test is carried out as follows Figure 6 The preset pressure test curve shown is used to increase the pressure and maintain the pressure, and check whether the filter 18 is leaking. Specifically, the pressure-boosting valve 11 and the pressure-boosting pump 10 of the rapid pressure test system are automatically opened, and the pressure is increased to the design pressure of the filter 18 for the first time, and then the pressure-boosting pump 10 and the pressure-boosting valve 11 are closed, and the first pressure maintenance begins. At this time, the system automatically performs pressure detection. After meeting the preset condition 1, the pressure-boosting pump 10 is opened again to increase the pressure to the test pressure for the second time, and then the pressure-boosting pump 10 and the pressure-boosting valve 11 are closed, and the second pressure maintenance begins. At this time, the system automatically performs pressure detection. After meeting the preset condition 2, the pressure relief valve 8 is opened, and the pressure is reduced to the design pressure for the first time, and then the pressure relief valve 8 is closed, and the third pressure maintenance begins. At this time, the system automatically performs pressure detection. After meeting the preset condition 3, after manual inspection and confirmation, the pressure relief valve 8 is opened again to start the second pressure reduction to 0 and then the pressure relief valve 8 is closed.

[0072] (3) The system prompts that the pressure test work has been completed and starts the pressure relief and exhaust work.

[0073] Specifically, the pressure exhaust valve 14 is opened to exhaust the water inside the filter 18. At the same time, the first pressure sensor detects the pressure value, and the second flow sensor detects the flow value. If the pressure inside the filter 18 is less than 0.1MPa and less than the design pressure, the pressure exhaust is continued until the detected flow value is 0, otherwise the exhaust valve 15 is opened to reduce the pressure. After the water inside the filter 18 is exhausted, the connecting pipeline is disassembled, the system resets the self-check, and a printed report is generated, and the entire pressure test is completed.

[0074] The system pressure test logic in step (2) is as follows:

[0075] ①Preset condition 1: The first pressure holding is equal to the design pressure after pressure testing;

[0076] ②Preset condition 2: The second pressure holding is equal to the test pressure after pressure detection;

[0077] ③Preset condition 3: The third pressure holding is equal to the design pressure after pressure test;

[0078] If the preset conditions are met, the system will proceed automatically. If the preset conditions are not met, the system will activate the leakage alarm, prompt manual confirmation, and open the pressure relief valve 8 to release the pressure, thus terminating the pressure test.

[0079] In addition, during the first pressure increase, when the test pressure reaches 80% of the set pressure, the booster pump 10 starts frequency conversion and the pressure increase speed is reduced to prevent pressure overshoot.

[0080] In this embodiment, before the first pressure increase to the design pressure, another pressure increase process can be set according to the needs of the container to be tested, that is, the pressure is first increased to 80% of the design pressure, and after the system self-checks and manually confirms that there is no leakage, the subsequent steps are continued to ensure the safety of the entire pressure test.

[0081] In order to improve the safety of the pressure test, in this embodiment, a second pressure sensor 20 is further provided to detect the pressure increase value and use it as a threshold value. When the threshold value exceeds the system setting value, the pressure pump 2 stops working.

[0082] like Figure 7 As shown in the figure, after the test process is completed, the system resets and automatically generates a report. Compared with the traditional manual registration of pressure test, the data is more accurate. When multiple devices need to be tested, the problem of manual data collation is prone to errors. At the same time, the rapid pressure test system automatically detects data and can save and archive data according to the number, which improves the efficiency of product traceability.

[0083] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

[0084] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rapid pressure test method for a filter, characterized in that: The following steps are involved: (1) The rapid pressure test system is ready for self-test; (2) The rapid pressure test system starts the pressure test according to the preset information and the set logic program, and records the data to generate a curve report; Wherein, the pressure test comprises the following steps: ① The pressure-boosting valve and pressure-boosting pump of the rapid pressure test system are automatically opened to increase the pressure to the filter design pressure for the first time, and then the pressure-boosting pump and pressure-boosting valve are closed to start the first pressure maintenance. At this time, the system automatically performs pressure detection; ② After the preset condition 1 is met, the booster pump is turned on again to increase the pressure to the test pressure for the second time, and then the booster pump and the booster valve are turned off to start the second pressure maintenance. At this time, the system automatically performs pressure detection; ③ After meeting the preset condition 2, the pressure relief valve opens and starts the first pressure reduction to the design pressure. Then the pressure relief valve closes and starts the third pressure maintenance. At this time, the system automatically performs pressure detection; ④ After meeting the preset condition 3, after manual inspection and confirmation, open the pressure relief valve again to start the second pressure reduction to 0 and then close the pressure relief valve; ⑤ After the pressure test is completed, the rapid pressure test system will reset itself and generate a curve report; The logic program is as follows: ①Preset condition 1: The first pressure holding is equal to the design pressure after pressure testing; ②Preset condition 2: The second pressure holding is equal to the test pressure after pressure detection; ③Preset condition 3: The third pressure holding is equal to the design pressure after pressure test; If the preset conditions are met, the system will proceed automatically. If the preset conditions are not met, the system will activate the leakage alarm, prompt manual confirmation, and open the pressure relief valve to release pressure, thus terminating the pressure test.

2. The rapid pressure testing method for a filter according to claim 1, characterized in that: Before the first pressure increase to the design pressure, set another pressure increase process, first increase the pressure to 80% of the design pressure, and continue with the subsequent steps after the system self-checks and manually confirms that there is no leakage.

3. The rapid pressure testing method for a filter according to claim 2, characterized in that: The preset information includes the pressure test location and the pressure test curve design.

4. The rapid pressure testing method for a filter according to claim 3, characterized in that: The pressure test curve includes set pressure, design pressure, test pressure, pressure relief pressure, pressure holding time, and pressure increase and pressure relief times.

5. The rapid pressure testing method for a filter according to claim 4, characterized in that: The self-test preparation of the rapid pressure test system includes detecting whether the status of each valve and sensor is normal, and whether the liquid level of the pressurized water tank is greater than 40%.

6. The rapid pressure testing method for a filter according to claim 5, characterized in that: During the first pressure increase, when the test pressure reaches 80% of the set pressure, the booster pump starts frequency conversion and the pressure increase speed is reduced.

7. The rapid pressure testing method for a filter according to claim 6, characterized in that: The rapid pressure test system is provided with a second pressure sensor for detecting the pressure rise value of the filter and using it as a threshold value. When the threshold value exceeds the system set value, the pressure pump stops working and the pressure test is terminated.

8. The rapid pressure testing method for a filter according to claim 1, characterized in that: When the internal pressure of the filter is detected to be greater than 0.1 MPa or greater than the design pressure during drainage in the pressure test, the rapid pressure test system automatically opens the exhaust valve to exhaust.

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