Performance detection device for air filtering pressure reducing valve

Abstract

The invention belongs to the technical field of performance detection of air filtering pressure reducing valves, and particularly relates to a performance detection device of an air filtering pressure reducing valve. The stop valve is installed on an outlet pipeline of the gas source tank, the pressure regulating valve is installed behind an outlet of the stop valve, the smoke generator is installed between the pressure regulating valve and the stop valve, the standard pressure gauge A is installed on an outlet pipeline of the pressure regulating valve, the module interface A is installed on an outlet of the pressure regulating valve, and the module interface B is installed on an inlet of the manual regulating valve. The gas particle detector is installed on an inlet of the manual regulating valve, the standard pressure gauge B is installed on an inlet pipeline of the manual regulating valve, and the gas flow meter is installed on an outlet pipeline of the manual regulating valve. The performance detection method is used for detecting the performance of the air filtering pressure reducing valve, and the detection content comprises the detection of the filtering effect of compressed air, the detection of the stability of output pressure and the detection of the influence of inlet pressure fluctuation on outlet pressure.

Description

Technical Field

[0001] The invention belongs to the technical field of air filter pressure reducing valve performance detection, and in particular relates to an air filter pressure reducing valve performance detection device. Background Art

[0002] Pneumatic valves are widely used in industrial sites. The source power of pneumatic valves is compressed air. Each pneumatic valve is equipped with an air filter pressure reducing valve, which provides the pneumatic valve with stable and clean compressed air through the filter pressure reducing valve. The air filter pressure reducing valve is designed according to the principle of force balance and consists of a hand wheel, spring, cover, diaphragm assembly, shell, ball valve, filter element and shell. After inputting 0.3-1.0MPa compressed air, the air filter pressure reducing valve can stably provide 0.1-1.0MPa clean air source. The outlet pressure is set by adjusting the spring pressure and the outlet pressure change is sensed by the diaphragm to achieve the pressure reduction and stabilization function.

[0003] The working principle of the air filter pressure reducing valve is as follows: rotate the adjusting screw to adjust the spring force and press the diaphragm downward, and the connected valve core moves downward. At this time, a passage is formed above the valve core chassis, and the air source passes through the filter to filter the air and output it through the outlet. When the outlet pressure rises to the set pressure, it is transmitted to the bottom of the diaphragm through the outlet pressure sensing hole, and is balanced with the spring pressure to maintain the set pressure. When the outlet pressure is greater than the set pressure, it is transmitted to the bottom of the diaphragm through the outlet pressure sensing hole, and the hole between the diaphragm and the chassis opens. The outlet pressure is transmitted to the spring chamber through this hole and discharged to the atmosphere through the breathing hole to maintain the set pressure.

[0004] In summary, the air filter pressure reducing valve has two functions: 1. Filter impurities in the air to provide a clean gas source for downstream users; 2. Stabilize the pressure to provide a stable gas source for downstream users. The gas output by the air filter pressure reducing valve is the power source of the downstream equipment, so the qualified performance of the air filter pressure reducing valve plays an important role in the stable operation of the downstream equipment. In view of the fact that there is currently no device for detecting the performance of the air filter pressure reducing valve, the present invention provides an air filter pressure reducing valve performance detection device to solve the problem of air filter pressure reducing valve performance detection. Summary of the invention

[0005] The purpose of the present invention is to provide an air filter pressure reducing valve performance detection device, which is used for the performance detection of the air filter pressure reducing valve. The detection content includes: the detection of the filtering effect of compressed air, the detection of the output pressure stability, and the detection of the influence of the inlet pressure fluctuation on the outlet pressure.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] An air filter pressure reducing valve performance detection device, wherein the stop valve is installed on the outlet pipeline of the gas source tank, the pressure regulating valve is installed behind the stop valve outlet, the smoke generator is installed between the pressure regulating valve and the stop valve, the standard pressure gauge A is installed on the pressure regulating valve outlet pipeline, the module interface A is installed on the pressure regulating valve outlet, the module interface B is installed on the inlet of the manual regulating valve, the gas particle detector is installed on the inlet of the manual regulating valve, the standard pressure gauge B is installed on the manual regulating valve inlet pipeline, and the gas flow meter is installed on the manual regulating valve outlet pipeline.

[0008] Module interface A and module interface B are installed outside the box, and other components are installed inside the box.

[0009] The filter pressure reducing valve is installed through module interface A and module interface B.

[0010] When the gas source pressure is stable: open the stop valve, slowly open the pressure regulating valve until the value of the standard pressure gauge A is stable and close to the pressure of the gas source, stop operating the pressure regulating valve, slowly open the air filter pressure reducing valve, observe that the value of the pressure gauge on the air filter pressure reducing valve gradually increases, and the value of the standard pressure gauge B also gradually increases, slowly open the manual regulating valve, observe the flow rate of the gas flow meter 20L / h, until the pressure gauge value reaches the set value, the value of the pressure gauge and the value of the standard pressure gauge B should be close, stop operating the air filter pressure reducing valve, wait for 5 minutes, record the values ​​of the pressure gauge on the air filter pressure reducing valve and the standard pressure gauge B respectively, evaluate the pressure reduction performance of the air filter pressure reducing valve, put the gas particle detector into use, and after 10 minutes, evaluate the filtration effect of the air filter pressure reducing valve based on the air particle detection results of the gas particle detector.

[0011] In the case of gas source pressure fluctuations: open the stop valve, slowly open the pressure regulating valve until the value of the standard pressure gauge A is stable and close to the pressure of the gas source, stop operating the pressure regulating valve, slowly open the air filter pressure reducing valve, observe the value of the pressure gauge on the air filter pressure reducing valve gradually increase, the value of the standard pressure gauge B is also gradually increase, slowly open the manual regulating valve, observe the flow rate of the gas flow meter 20L / h, until the pressure gauge value reaches the set value, the value of the pressure gauge and the value of the standard pressure gauge B should be close, stop operating the air filter pressure reducing valve, quickly switch the pressure regulating valve, observe the value of the standard pressure gauge A is changing rapidly, the value of the standard pressure gauge A is not lower than the value of the pressure gauge, record the value changes of the pressure gauge and the standard pressure gauge B, test the pressure stabilization performance of the air filter pressure reducing valve, quickly switch the manual regulating valve, record the value changes of the pressure gauge and the standard pressure gauge B, test the pressure stabilization performance of the air filter pressure reducing valve.

[0012] In case of fluctuation in the cleanliness of the gas source: open the stop valve, slowly open the pressure regulating valve until the value of the standard pressure gauge A is stable and close to the pressure of the gas source, stop operating the pressure regulating valve, slowly open the air filter pressure reducing valve, observe that the value of the pressure gauge on the air filter pressure reducing valve gradually increases, and the value of the standard pressure gauge B also gradually increases, slowly open the manual regulating valve, observe the flow rate of the gas flow meter 20L / h, until the pressure gauge value reaches the set value, the value of the pressure gauge and the value of the standard pressure gauge B should be close, stop operating the air filter pressure reducing valve, put into use the smoke generator, stay for 10 minutes, record the value of the gas particle detector, and test the filtration performance of the air filter pressure reducing valve.

[0013] The conditions for judging whether the performance of the air filter pressure reducing valve is qualified are as follows: the allowable pressure fluctuation value of the air filter pressure reducing valve is the set value ±4%. If the numerical fluctuation range of the pressure gauge is within ±4% of the set value, the output pressure performance of the air filter pressure reducing valve meets the requirements; if the filtration degree of the air filter pressure reducing valve is lower than 75μm, the filtration performance of the air filter pressure reducing valve meets the requirements.

[0014] The beneficial effects achieved by the present invention are:

[0015] The present invention can detect whether the output air pressure value of the air filter pressure reducing valve meets the product design requirements. It can detect whether the impurity particles in the output gas of the air filter pressure reducing valve meet the product design requirements. The gas source pressure is changed by the pressure regulating valve (simulating the gas source pressure fluctuation) to detect whether the pressure of the output gas meets the design requirements. The outlet pressure of the air filter pressure reducing valve is changed by the manual regulating valve (simulating the change in gas consumption) to detect whether the pressure of the output gas meets the design requirements. The modular design has a compact structure and is easy to process and install. An air filter pressure reducing valve installation interface is designed for easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the schematic diagram of the air filter pressure reducing valve;

[0017] Figure 2 This is a module diagram of an air filter pressure reducing valve performance testing device;

[0018] Figure 3 This is the installation diagram of the air filter pressure reducing valve performance detection device;

[0019] In the figure: 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-standard pressure gauge A (accuracy not less than 0.4 level); 12-box; 13-gas particle detector; 14-stop valve; 15-pressure regulating valve; 16-module interface A; 17-module interface B; 18-standard pressure gauge B; 19-gas flow meter; 20-filter pressure reducing valve; 21-pressure gauge; 22-smoke generator. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] An air filter pressure reducing valve performance detection device includes a gas source tank 9, a manual regulating valve 10, a standard pressure gauge A11, a box 12, a gas particle detector 13, a stop valve 14, a pressure regulating valve 15, a module interface A16, a module interface B17, a standard pressure gauge B18, a gas flow meter 19, and a smoke generator 22. Except for the module interface A16 and the module interface B17, the above equipment is installed in the box 12; the module interface A16 and the module interface B17 are installed outside the box 12. The filter pressure reducing valve 20 is installed through the module interface A16 and the module interface B17.

[0022] The stop valve 14 is installed on the outlet pipeline of the gas source tank 9, the pressure regulating valve 15 is installed behind the outlet of the stop valve 14, the smoke generator 22 is installed between the pressure regulating valve 15 and the stop valve 14, the standard pressure gauge A11 is installed on the outlet pipeline of the pressure regulating valve 15, and the module interface A16 is installed on the outlet of the pressure regulating valve 15 and is located outside the box 12. The module interface B17 is installed on the inlet of the manual regulating valve 10 and is located outside the box 12. The gas particle detector 13 is installed on the inlet of the manual regulating valve 10, the standard pressure gauge B18 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.

[0023] When the gas source pressure is stable, the performance test method of the air filter pressure reducing valve is as follows: open the stop valve 14, slowly open the pressure regulating valve 15, until the value of the standard pressure gauge A11 is stable and close to the pressure of the gas source, and stop operating the pressure regulating valve 15. Slowly open the air filter pressure reducing valve 20, and observe that the value of the pressure gauge 21 of the air filter pressure reducing valve gradually increases, and the value of the standard pressure gauge B18 also gradually increases. Slowly open the manual regulating valve 10, observe the flow rate of the gas flow meter 19 is about 20L / h, until the value of the pressure gauge 21 reaches the set value, the value of the pressure gauge 21 and the value of the standard pressure gauge B18 should be close, and stop operating the air filter pressure reducing valve 20. Wait for 5 minutes, record the values ​​of the pressure gauge 21 and the standard pressure gauge B18 of the air filter pressure reducing valve, and evaluate the pressure reduction performance of the air filter pressure reducing valve. Put the gas particle detector 13 into use, and after 10 minutes, evaluate the filtering effect of the air filter pressure reducing valve according to the air particle detection results of the gas detector.

[0024] In the case of gas source pressure fluctuation, the performance test method of the air filter pressure reducing valve is as follows: open the stop valve 14, slowly open the pressure regulating valve 15, until the value of the standard pressure gauge A11 is stable and close to the pressure of the gas source, and stop operating the pressure regulating valve 15. Slowly open the air filter pressure reducing valve 20, observe that the value of the pressure gauge 21 of the air filter pressure reducing valve gradually increases, and the value of the standard pressure gauge B18 also gradually increases. Slowly open the manual regulating valve 10, observe the flow rate of the gas flow meter 19 is about 20L / h, until the value of the pressure gauge 21 reaches the set value, the value of the pressure gauge 21 and the value of the standard pressure gauge B18 should be close, and stop operating the air filter pressure reducing valve 20. Quickly switch the pressure regulating valve 15, observe that the value of the standard pressure gauge A11 is changing rapidly (the value of the standard pressure gauge A11 is not lower than the value of the air filter pressure reducing valve outlet pressure gauge 21), and record the value changes of the pressure gauge 21 and the standard pressure gauge B18 (detect the pressure stabilization performance of the air filter pressure reducing valve 20). Quickly open and close the manual regulating valve 10, and record the changes in the values ​​of the pressure gauge 21 and the standard pressure gauge B18 (to test the pressure stabilizing performance of the air filter pressure reducing valve 20).

[0025] In the case of fluctuations in the cleanliness of the gas source, the method for testing the filtering performance of the air filter pressure reducing valve is as follows: open the stop valve 14, slowly open the pressure regulating valve 15, until the value of the standard pressure gauge A11 is stable and close to the pressure of the gas source, and stop operating the pressure regulating valve 15. Slowly open the air filter pressure reducing valve 20, and observe that the value of the pressure gauge 21 of the air filter pressure reducing valve gradually increases, and the value of the standard pressure gauge B18 also gradually increases. Slowly open the manual regulating valve 10, observe the flow rate of the gas flow meter 19 is about 20L / h, until the value of the pressure gauge 21 reaches the set value, the value of the pressure gauge 21 and the value of the standard pressure gauge B18 should be close, and stop operating the air filter pressure reducing valve 20. Put in the smoke generator 22, stay for 10 minutes, record the value of the gas particle detector 13, and test the filtering performance of the air filter pressure reducing valve.

[0026] The conditions for judging whether the air filter pressure reducing valve is qualified are as follows:

[0027] 1. The pressure fluctuation of the filter pressure reducing valve is allowed to be ±4% of the set value. If the value fluctuation range of the pressure gauge 21 is within ±4% of the set value, the output pressure performance of the air filter pressure reducing valve meets the requirements.

[0028] 2. If the filtration degree of the filter pressure reducing valve is lower than 75μm, the filtration performance of the air filter pressure reducing valve meets the requirements.

Claims

1. An air filter pressure reducing valve performance detection device, characterized in that: The stop valve is installed on the outlet pipeline of the gas source tank, the pressure regulating valve is installed behind the stop valve outlet, the smoke generator is installed between the pressure regulating valve and the stop valve, the standard pressure gauge A is installed on the outlet pipeline of the pressure regulating valve, the module interface A is installed on the outlet of the pressure regulating valve, the module interface B is installed on the inlet of the manual regulating valve, the gas particle detector is installed on the inlet of the manual regulating valve, the standard pressure gauge B is installed on the inlet pipeline of the manual regulating valve, and the gas flow meter is installed on the outlet pipeline of the manual regulating valve.

2. The air filter pressure reducing valve performance detection device according to claim 1, characterized in that: Module interface A and module interface B are installed outside the box, and other components are installed inside the box.

3. The air filter pressure reducing valve performance detection device according to claim 1, characterized in that: The filter pressure reducing valve is installed through module interface A and module interface B.

4. The air filter pressure reducing valve performance detection device according to claim 1, characterized in that: When the gas source pressure is stable: open the stop valve, slowly open the pressure regulating valve until the value of the standard pressure gauge A is stable and close to the pressure of the gas source, stop operating the pressure regulating valve, slowly open the air filter pressure reducing valve, observe that the value of the pressure gauge on the air filter pressure reducing valve gradually increases, and the value of the standard pressure gauge B also gradually increases, slowly open the manual regulating valve, observe the flow rate of the gas flow meter 20L / h, until the pressure gauge value reaches the set value, the value of the pressure gauge and the value of the standard pressure gauge B should be close, stop operating the air filter pressure reducing valve, wait for 5 minutes, record the values ​​of the pressure gauge on the air filter pressure reducing valve and the standard pressure gauge B respectively, evaluate the pressure reduction performance of the air filter pressure reducing valve, put the gas particle detector into use, and after 10 minutes, evaluate the filtration effect of the air filter pressure reducing valve based on the air particle detection results of the gas particle detector.

5. The air filter pressure reducing valve performance detection device according to claim 1, characterized in that: In the case of gas source pressure fluctuations: open the stop valve, slowly open the pressure regulating valve until the value of the standard pressure gauge A is stable and close to the pressure of the gas source, stop operating the pressure regulating valve, slowly open the air filter pressure reducing valve, observe the value of the pressure gauge on the air filter pressure reducing valve gradually increase, the value of the standard pressure gauge B is also gradually increase, slowly open the manual regulating valve, observe the flow rate of the gas flow meter 20L / h, until the pressure gauge value reaches the set value, the value of the pressure gauge and the value of the standard pressure gauge B should be close, stop operating the air filter pressure reducing valve, quickly switch the pressure regulating valve, observe the value of the standard pressure gauge A is changing rapidly, the value of the standard pressure gauge A is not lower than the value of the pressure gauge, record the value changes of the pressure gauge and the standard pressure gauge B, test the pressure stabilization performance of the air filter pressure reducing valve, quickly switch the manual regulating valve, record the value changes of the pressure gauge and the standard pressure gauge B, test the pressure stabilization performance of the air filter pressure reducing valve.

6. The air filter pressure reducing valve performance detection device according to claim 1, characterized in that: In case of fluctuation in the cleanliness of the gas source: open the stop valve, slowly open the pressure regulating valve until the value of the standard pressure gauge A is stable and close to the pressure of the gas source, stop operating the pressure regulating valve, slowly open the air filter pressure reducing valve, observe that the value of the pressure gauge on the air filter pressure reducing valve gradually increases, and the value of the standard pressure gauge B also gradually increases, slowly open the manual regulating valve, observe the flow rate of the gas flow meter 20L / h, until the pressure gauge value reaches the set value, the value of the pressure gauge and the value of the standard pressure gauge B should be close, stop operating the air filter pressure reducing valve, put into use the smoke generator, stay for 10 minutes, record the value of the gas particle detector, and test the filtration performance of the air filter pressure reducing valve.

7. The air filter pressure reducing valve performance detection device according to claim 1, characterized in that: The conditions for judging whether the performance of the air filter pressure reducing valve is qualified are as follows: the pressure fluctuation value of the air filter pressure reducing valve is allowed to be ±4% of the set value. If the value fluctuation range of the pressure gauge is within ±4% of the set value, the output pressure performance of the air filter pressure reducing valve meets the requirements; If the filtration degree of the air filter pressure reducing valve is lower than 75μm, the filtration performance of the air filter pressure reducing valve meets the requirements.

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