Air filter pressure reducing valve performance detection device and method

Abstract

The present application relates to the field of nuclear power equipment, and more particularly to an air filter pressure reducing valve performance detection device and method. The device comprises: a first module interface and a second module interface for connecting with the air filter pressure reducing valve; a gas source tank, the outlet pipeline of which is sequentially connected with a stop valve, a smoke generator, a pressure regulating valve, a first standard pressure gauge and the first module interface; a manual regulating valve, the inlet pipeline of which is sequentially connected with a second standard pressure gauge, a gas particle detector and the second module interface; and a gas flow meter is installed on the outlet pipeline thereof. The air filter pressure reducing valve performance is detected by using the air filter pressure reducing valve performance detection device. The air filter pressure reducing valve can be detected from the filtering effect of compressed air, the output pressure stability and the influence of the inlet pressure fluctuation on the outlet pressure. The detection is comprehensive and convenient to use.

Description

Technical Field

[0001] This invention relates to the field of nuclear power equipment, and in particular to a device and method for testing the performance of an air filter pressure reducing valve. Background Technology

[0002] Pneumatic valves are widely used in industrial settings. These valves are powered by compressed air, and each is equipped with an air filter and pressure regulator. This regulator provides the valve with clean, stable compressed air. Designed based on the principle of force balance, the air filter and pressure regulator consists of a handwheel, spring, cover, diaphragm assembly, body, ball valve, filter element, and outer shell. After receiving 0.3-1.0 MPa compressed air, it can stably provide a clean air source of 0.1-1.0 MPa. The outlet pressure is set by adjusting the spring pressure, and the pressure is reduced and stabilized by sensing changes in the outlet pressure through the diaphragm.

[0003] The working principle of the air filter pressure reducing valve is as follows: Figure 1 As shown:

[0004] Rotating the adjusting screw 1 causes the adjusting spring 2 to press down on the diaphragm 3, moving the connected valve core 6 downwards. This creates a passage above the valve core base, allowing air to pass through the filter 8 and be filtered before being output through the outlet. When the outlet pressure reaches the set pressure, it is transmitted through the outlet pressure sensing hole to the bottom of the diaphragm 3, balancing the pressure with that of the spring 2 and maintaining the set pressure. When the outlet pressure exceeds the set pressure, it is transmitted through the outlet pressure sensing hole to the bottom of the diaphragm 3, opening the hole between the diaphragm and the base. The outlet pressure then passes through this hole to the spring chamber and is discharged to the atmosphere through the breather 7, maintaining the set pressure.

[0005] In summary, air filter pressure reducing valves have two functions: 1. Filtering impurities in the air to provide a clean air source for downstream users; 2. Stabilizing pressure to provide a stable air source for downstream users. The gas output by the air filter pressure reducing valve is the power source for downstream equipment; therefore, the qualified performance of the air filter pressure reducing valve plays a crucial role in the stable operation of downstream equipment.

[0006] Before use, air filter pressure reducing valves need to be tested for performance. Currently, there is no comprehensive method or device for testing the performance of air filter pressure reducing valves. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide an air filter pressure reducing valve performance testing device and method, which can test the air filter pressure reducing valve from aspects such as the filtration effect of compressed air, output pressure stability and the influence of inlet pressure fluctuation on outlet pressure.

[0008] This invention provides a device for testing the performance of an air filter pressure reducing valve, comprising:

[0009] The first module interface and the second module interface are used to connect to the air filter pressure reducing valve;

[0010] The gas source tank has a shut-off valve, a smoke generator, a pressure regulating valve, a first standard pressure gauge, and a first module interface connected sequentially to its outlet pipeline.

[0011] The manual regulating valve has a second standard pressure gauge, a gas particle detector, and a second module interface connected sequentially to its inlet pipeline; a gas flow meter is installed on its outlet pipeline.

[0012] In one specific embodiment of the present invention, a housing is also included, wherein the first module interface and the second module interface are installed outside the housing, and other components are disposed inside the housing.

[0013] In one specific embodiment of the present invention, the accuracy of the first standard pressure gauge is not less than 0.4 grade.

[0014] In one specific embodiment of the present invention, the accuracy of the second standard pressure gauge is not less than 0.4 grade.

[0015] This invention provides a method for testing the performance of an air filter pressure reducing valve using the air filter pressure reducing valve performance testing device described above, comprising the following steps:

[0016] Step 1: Connect the air filter pressure reducing valve to the first module interface and the second module interface;

[0017] Step 2: Simulate stable air source pressure, fluctuating air source pressure, and fluctuating air source cleanliness to test the performance of the air filter pressure reducing valve;

[0018] If the fluctuation range of the pressure gauge on the air filter pressure regulator is within ±4% of the set value, the output pressure performance of the air filter pressure regulator meets the requirements; if it exceeds ±4% of the set value, the output pressure performance of the air filter pressure regulator does not meet the requirements.

[0019] If the filtration efficiency of the air filter pressure reducing valve is less than 75μm, then the filtration performance of the air filter pressure reducing valve meets the requirements.

[0020] If the filtration efficiency of the air filter pressure reducing valve is not less than 75μm, then the filtration performance of the air filter pressure reducing valve does not meet the requirements.

[0021] In one specific embodiment of the present invention, in step 2, when simulating a stable gas source pressure,

[0022] Open the shut-off valve, then slowly open the pressure regulating valve until the reading on the first standard pressure gauge stabilizes and approaches the pressure of the gas source, then stop operating the pressure regulating valve.

[0023] After slowly opening the air filter pressure reducing valve, slowly open the manual adjustment valve until the pressure gauge on the air filter pressure reducing valve reaches the set value, and the pressure gauge reading is close to the reading of the second standard pressure gauge. Then stop operating the air filter pressure reducing valve.

[0024] Maintain ventilation and record the fluctuations in the pressure gauge readings on the air filter pressure regulator and the second standard pressure gauge to evaluate the pressure reduction performance of the air filter pressure regulator.

[0025] Put the gas particle detector into operation, keep the air supply running, record the values ​​from the gas particle detector, and evaluate the filtration performance of the air filter pressure reducing valve.

[0026] In one specific embodiment of the present invention, in step 2, when simulating gas source pressure fluctuations,

[0027] Open the shut-off valve, then slowly open the pressure regulating valve until the reading on the first standard pressure gauge stabilizes and approaches the pressure of the gas source, then stop operating the pressure regulating valve.

[0028] After slowly opening the air filter pressure reducing valve, slowly open the manual adjustment valve until the pressure gauge on the air filter pressure reducing valve reaches the set value, and the pressure gauge reading is close to the reading of the second standard pressure gauge. Then stop operating the air filter pressure reducing valve.

[0029] Quickly switch the pressure regulating valve on and off, and record the fluctuations of the pressure gauge readings on the air filter pressure reducing valve and the second standard pressure gauge.

[0030] Quickly switch the manual regulating valve on and off, and record the fluctuations in the pressure gauge readings on the air filter pressure regulator and the second standard pressure gauge.

[0031] The pressure stabilizing performance of the air filter pressure reducing valve is evaluated based on the fluctuations in the pressure gauge readings on the air filter pressure reducing valve itself and the fluctuations in the pressure gauge readings on the second standard gauge.

[0032] In one specific embodiment of the present invention, in step 2, when simulating fluctuations in the cleanliness of the air source,

[0033] Open the shut-off valve, then slowly open the pressure regulating valve until the reading on the first standard pressure gauge stabilizes and approaches the pressure of the gas source, then stop operating the pressure regulating valve.

[0034] After slowly opening the air filter pressure reducing valve, slowly open the manual adjustment valve until the pressure gauge on the air filter pressure reducing valve reaches the set value, and the pressure gauge reading is close to the reading of the second standard pressure gauge. Then stop operating the air filter pressure reducing valve.

[0035] Put the smoke generator into operation and maintain it for a period of time. Record the values ​​of the gas particle detector to evaluate the filtration performance of the air filter pressure reducing valve.

[0036] In one specific embodiment of the present invention, after slowly opening the manual regulating valve, observe the flow rate of the gas flow meter until the pressure gauge value of the air filter pressure reducing valve reaches the set value and the pressure gauge value of the air filter pressure reducing valve is close to the second standard pressure gauge value, then stop operating the air filter pressure reducing valve.

[0037] The flow rate of the gas flow meter is 15-25 L / h.

[0038] In a specific embodiment of the present invention, in step 1, the air inlet of the air filter pressure reducing device is connected to the interface of the first module, and its outlet is connected to the interface of the second module.

[0039] Compared with the prior art, the air filter pressure reducing valve performance testing device and method of the present invention have the following beneficial effects:

[0040] (1) This device can simulate various working conditions, such as the fluctuation of air source pressure, the change of air volume, and the fluctuation of air source cleanliness, so as to test from multiple aspects whether the pressure of the air filter pressure reducing valve meets the design requirements and whether the filtration effect meets the design and usage requirements.

[0041] (2) This device can detect whether the output air pressure value of the air filter pressure reducing valve meets the product design requirements;

[0042] (3) This device features a modular design, a compact structure, and is easy to process and install;

[0043] (4) The device is designed with an air filter pressure reducing valve installation interface, which is convenient to use and easy to install. Attached Figure Description

[0044] Figure 1 This diagram illustrates the principle of an air filter pressure regulator.

[0045] Figure 2 A schematic diagram showing the structure of an air filter pressure reducing valve performance testing device;

[0046] Figure 3 This diagram shows the installation of an air filter pressure regulator performance testing device.

[0047] In the diagram, 1-adjusting screw; 2-spring; 3-diaphragm; 4-valve stem; 5-valve seat; 6-valve core; 7-breathing hole; 8-filter; 9-gas source tank; 10-manual regulating valve; 11-first standard pressure gauge; 12-box body; 13-gas particle detector; 14-stop valve; 15-pressure regulating valve; 16-first module interface; 17-second module interface; 18-second standard pressure gauge; 19-gas flow meter; 20-air filter pressure reducing valve; 21-pressure gauge integrated into the air filter pressure reducing valve; 22-smoke generator. Detailed Implementation

[0048] To further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the present invention.

[0049] An embodiment of the present invention discloses a device for testing the performance of an air filter pressure reducing valve, such as... Figure 2 As shown, it includes:

[0050] Box 12,

[0051] The first module interface 16 and the second module interface 17 are used to connect to the air filter pressure reducing valve 20; the first module interface 16 and the second module interface 17 are installed outside the housing 12.

[0052] The gas source tank 9, manual regulating valve 10, first standard pressure gauge 11, gas particle detector 13, shut-off valve 14, pressure regulating valve 15, second standard pressure gauge 18, gas flow meter 19 and smoke generator 22 are installed inside the housing 12.

[0053] Gas source tank 9, with a shut-off valve 14, a smoke generator 22, a pressure regulating valve 15, a first standard pressure gauge 11 and a first module interface 16 connected in sequence on its outlet pipeline;

[0054] The manual regulating valve 10 has a second standard pressure gauge 18, a gas particle detector 13, and a second module interface 17 connected sequentially on its inlet pipeline; a gas flow meter 19 is installed on its outlet pipeline.

[0055] The accuracy of the first standard pressure gauge 11 is not less than 0.4 grade.

[0056] The accuracy of the second standard pressure gauge 18 is not lower than 0.4.

[0057] The installation method of each device in the air filter pressure reducing valve performance testing device of the present invention is as follows: The shut-off valve 14 is installed on the outlet pipeline of the gas source tank 9; the pressure regulating valve 15 is installed after the outlet of the shut-off valve 14; the smoke generator 22 is installed between the manual regulating valve 15 and the shut-off valve 14; the first standard pressure gauge 11 is installed on the outlet pipeline of the pressure regulating valve 15; the first module interface 16 is installed on the outlet of the manual regulating valve 15 and located outside the housing 12; the second module interface 17 is installed on the inlet of the manual regulating valve 10 and located outside the housing 12; the gas particle detector 13 is installed on the inlet of the manual regulating valve 10; the second standard pressure gauge 18 is installed on the inlet pipeline of the manual regulating valve 10; and the gas flow meter 19 is installed on the outlet pipeline of the manual regulating valve 10.

[0058] See the installation effect diagram of the air filter pressure reducing valve performance testing device. Figure 3 .

[0059] The embodiments of the present invention also disclose a method for testing the performance of an air filter pressure reducing valve using the air filter pressure reducing valve performance testing device described above, comprising the following steps:

[0060] Step 1: Connect the air filter pressure reducing valve 20 to the first module interface 16 and the second module interface 17;

[0061] The air filter pressure reducing inlet is connected to the first module interface 16, and its outlet is connected to the second module interface 17.

[0062] Step 2: Simulate stable air source pressure, fluctuating air source pressure, and fluctuating air source cleanliness to test the performance of the air filter pressure reducing valve 20;

[0063] Specifically, when simulating a stable gas source pressure,

[0064] Open the shut-off valve 14, and slowly open the pressure regulating valve 15 until the value of the first standard pressure gauge 11 stabilizes and approaches the pressure of the air source, then stop operating the pressure regulating valve 15.

[0065] Slowly open the air filter pressure reducing valve 20 and observe that the value of the pressure gauge 21 on the air filter pressure reducing valve gradually increases. After the value of the second standard pressure gauge 18 also gradually increases, slowly open the manual regulating valve 10 and observe that the flow rate of the gas flow meter 19 is 15-25 L / h. Continue until the value of the pressure gauge 21 on the air filter pressure reducing valve reaches the set value and the value of the pressure gauge 21 on the air filter pressure reducing valve and the value of the second standard pressure gauge 18 are close. Then stop operating the air filter pressure reducing valve 20.

[0066] Maintain ventilation for at least 5 to 10 minutes, record the fluctuation of the pressure gauge 21 on the air filter pressure regulator and the fluctuation of the second standard pressure gauge 18, and evaluate the pressure reduction performance of the air filter pressure regulator 20.

[0067] Put the gas particle detector 13 into the system, keep the system ventilated, and after at least 10 minutes, record the values ​​of the gas particle detector 13 to evaluate the filtration performance of the air filter pressure reducing valve 20.

[0068] When simulating gas source pressure fluctuations,

[0069] Open the shut-off valve 14, and slowly open the pressure regulating valve 15 until the value of the first standard pressure gauge 11 stabilizes and approaches the pressure of the air source, then stop operating the pressure regulating valve 15.

[0070] Slowly open the air filter pressure reducing valve 20 and observe that the value of the pressure gauge 21 on the air filter pressure reducing valve gradually increases. After the value of the second standard pressure gauge 18 also gradually increases, slowly open the manual regulating valve 10 and observe that the flow rate of the gas flow meter 19 is 15-25 L / h. Continue until the value of the pressure gauge 21 on the air filter pressure reducing valve reaches the set value and the value of the pressure gauge 21 on the air filter pressure reducing valve and the value of the second standard pressure gauge 18 are close. Then stop operating the air filter pressure reducing valve 20.

[0071] Quickly switch the pressure regulating valve 15 on and off, and record the fluctuation of the pressure gauge 21 built into the air filter pressure reducing valve, as well as the fluctuation of the second standard pressure gauge 18.

[0072] Quickly switch the manual regulating valve 10 on and off, and record the fluctuations in the pressure readings on the air filter pressure reducing valve's built-in pressure gauge 21 and the second standard pressure gauge 18.

[0073] The pressure stabilizing performance of the air filter pressure reducing valve 20 is evaluated based on the fluctuation of the pressure gauge 21 built into the air filter pressure reducing valve 20 and the fluctuation of the second standard pressure gauge 18.

[0074] When simulating fluctuations in the cleanliness of the air source,

[0075] Open the shut-off valve 14, and slowly open the pressure regulating valve 15 until the value of the first standard pressure gauge 11 stabilizes and approaches the pressure of the air source, then stop operating the pressure regulating valve 15.

[0076] After slowly opening the air filter pressure reducing valve 20, observe that the value of the pressure gauge 21 on the air filter pressure reducing valve gradually increases, and the value of the second standard pressure gauge 18 also gradually increases. Then, slowly open the manual regulating valve 10 and observe that the flow rate of the gas flow meter 19 is 15-25 L / h. Continue until the value of the pressure gauge 21 on the air filter pressure reducing valve 20 reaches the set value, and the value of the pressure gauge 21 on the air filter pressure reducing valve 20 and the value of the second standard pressure gauge 18 are close. Then, stop operating the air filter pressure reducing valve 20.

[0077] After putting the smoke generator 22 into operation and maintaining it for 10 to 20 minutes, record the value of the gas particle detector 13 to evaluate the filtration performance of the air filter pressure reducing valve 20.

[0078] After the above simulation, based on the fluctuations in the pressure gauge readings of the air filter pressure regulator and the second standard pressure gauge, an evaluation is conducted according to the following criteria:

[0079] If the fluctuation range of the pressure gauge of the air filter pressure reducing valve 20 is within ±4% of the set value, the output pressure performance of the air filter pressure reducing valve 20 meets the requirements; if it exceeds ±4% of the set value, the output pressure performance of the air filter pressure reducing valve 20 does not meet the requirements.

[0080] Based on the values ​​from the gas particle detector 13, the filtration performance of the air filter pressure reducing valve is evaluated according to the following standards:

[0081] If the filtration degree of the air filter pressure reducing valve 20 is less than 75μm, then the filtration performance of the air filter pressure reducing valve 20 meets the requirements.

[0082] If the filtration efficiency of the air filter pressure reducing valve 20 is not less than 75μm, then the filtration performance of the air filter pressure reducing valve 20 does not meet the requirements.

[0083] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0084] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for testing the performance of an air filter pressure reducing valve, characterized in that, include: The first module interface and the second module interface are used to connect to the air filter pressure reducing valve; The gas source tank has a shut-off valve, a smoke generator, a pressure regulating valve, a first standard pressure gauge, and a first module interface connected sequentially to its outlet pipeline. The manual regulating valve has a second standard pressure gauge, a gas particle detector, and a second module interface connected sequentially to its inlet pipeline; a gas flow meter is installed on its outlet pipeline.

2. The air filter pressure reducing valve performance testing device according to claim 1, characterized in that, It also includes a housing, with the first module interface and the second module interface installed outside the housing, and other components located inside the housing.

3. The air filter pressure reducing valve performance testing device according to claim 1, characterized in that, The accuracy of the first standard pressure gauge is not less than 0.4 grade.

4. The air filter pressure reducing valve performance testing device according to claim 1, characterized in that, The accuracy of the second standard pressure gauge is not lower than 0.

4.

5. A method for testing the performance of an air filter pressure reducing valve using the air filter pressure reducing valve performance testing device according to any one of claims 1 to 4, characterized in that, Includes the following steps: Step 1: Connect the air filter pressure reducing valve to the first module interface and the second module interface; Step 2: Simulate stable air source pressure, fluctuating air source pressure, and fluctuating air source cleanliness to test the performance of the air filter pressure reducing valve; If the fluctuation range of the pressure gauge on the air filter pressure regulator is within ±4% of the set value, the output pressure performance of the air filter pressure regulator meets the requirements; if it exceeds ±4% of the set value, the output pressure performance of the air filter pressure regulator does not meet the requirements. If the filtration efficiency of the air filter pressure reducing valve is less than 75μm, then the filtration performance of the air filter pressure reducing valve meets the requirements. If the filtration efficiency of the air filter pressure reducing valve is not less than 75μm, then the filtration performance of the air filter pressure reducing valve does not meet the requirements.

6. The method for testing the performance of an air filter pressure reducing valve according to claim 5, characterized in that, In step 2, when simulating a stable gas source pressure, Open the shut-off valve, then slowly open the pressure regulating valve until the reading on the first standard pressure gauge stabilizes and approaches the pressure of the gas source, then stop operating the pressure regulating valve. After slowly opening the air filter pressure reducing valve, slowly open the manual adjustment valve until the pressure gauge on the air filter pressure reducing valve reaches the set value, and the pressure gauge reading is close to the reading of the second standard pressure gauge. Then stop operating the air filter pressure reducing valve. Maintain ventilation and record the fluctuations in the pressure gauge readings on the air filter pressure regulator and the second standard pressure gauge to evaluate the pressure reduction performance of the air filter pressure regulator. Put the gas particle detector into operation, keep the air supply running, record the values ​​from the gas particle detector, and evaluate the filtration performance of the air filter pressure reducing valve.

7. The method for testing the performance of an air filter pressure reducing valve according to claim 5, characterized in that, In step 2, when simulating gas source pressure fluctuations, Open the shut-off valve, then slowly open the pressure regulating valve until the reading on the first standard pressure gauge stabilizes and approaches the pressure of the gas source, then stop operating the pressure regulating valve. After slowly opening the air filter pressure reducing valve, slowly open the manual adjustment valve until the pressure gauge on the air filter pressure reducing valve reaches the set value, and the pressure gauge reading is close to the reading of the second standard pressure gauge. Then stop operating the air filter pressure reducing valve. Quickly switch the pressure regulating valve on and off, and record the fluctuations of the pressure gauge readings on the air filter pressure reducing valve and the second standard pressure gauge. Quickly switch the manual regulating valve on and off, and record the fluctuations in the pressure gauge readings on the air filter pressure regulator and the second standard pressure gauge. The pressure stabilizing performance of the air filter pressure reducing valve is evaluated based on the fluctuations in the pressure gauge readings on the air filter pressure reducing valve itself and the fluctuations in the pressure gauge readings on the second standard gauge.

8. The method for testing the performance of an air filter pressure reducing valve according to claim 5, characterized in that, In step 2, when simulating fluctuations in the cleanliness of the air source, Open the shut-off valve, then slowly open the pressure regulating valve until the reading on the first standard pressure gauge stabilizes and approaches the pressure of the gas source, then stop operating the pressure regulating valve. After slowly opening the air filter pressure reducing valve, slowly open the manual adjustment valve until the pressure gauge on the air filter pressure reducing valve reaches the set value, and the pressure gauge reading is close to the reading of the second standard pressure gauge. Then stop operating the air filter pressure reducing valve. Put the smoke generator into operation and maintain it for a period of time. Record the values ​​of the gas particle detector to evaluate the filtration performance of the air filter pressure reducing valve.

9. The method for testing the performance of an air filter pressure reducing valve according to claim 5, characterized in that, After slowly opening the manual regulating valve, observe the flow rate of the gas flow meter until the pressure gauge on the air filter pressure reducing valve reaches the set value and the pressure gauge reading is close to the second standard pressure gauge reading. Then stop operating the air filter pressure reducing valve. The flow rate of the gas flow meter is 15-25 L / h.

10. The method for testing the performance of an air filter pressure reducing valve according to claim 5, characterized in that, In step 1, the air inlet of the air filter pressure reducing device is connected to the interface of the first module, and its outlet is connected to the interface of the second module.

Images