Air supply system of nozzle stress application regulator test bed

Abstract

The utility model provides an air supply system of a nozzle stress application regulator test bed. The air supply system comprises a low-pressure air path and a medium-pressure air path, the low-pressure air path comprises a low-pressure air source, and the low-pressure air source is sequentially connected with a manual air pressure regulating valve DK15, an electric proportional valve BF12 and a low-pressure air inlet C6 of a three-way electromagnetic valve DF38 nozzle stress application regulator through pipelines; the three-way electromagnetic valve DF38 is further connected with an electric proportional valve DF13 through a pipeline, the electric proportional valve DF13 is connected with a negative pressure opening of the SMC vacuum generator, a compressed air inlet of the vacuum generator is connected with an electromagnetic switch valve DF39 through a manual air pressure adjusting valve DK16, and the electromagnetic switch valve DF39 is connected with a low-pressure air source. The low-pressure air source accurately adjusts the low-pressure air inlet pressure of the stress application regulator through the adjusting valve, and negative pressure is achieved through the SMC vacuum generator. The two pneumatic diaphragm regulating valves arranged on the medium-pressure air source not only can control the size of the medium-pressure air inlet, but also can guarantee the air source precision of low-pressure air.

Description

Technical Field

[0001] The utility model relates to an air supply system of a nozzle booster regulator test bench. Background Art

[0002] The low-pressure air inlet of the nozzle pressure regulating valve can be adjusted smoothly within the range of -20kPa to +20kPa; the requirement for medium-pressure air entering the nozzle booster regulator C11 is: 0 to 5Mpa (absolute pressure). And the medium-pressure air inlet requires a flow rate Q> 15m 3 / min. Therefore, during the adjustment test of the nozzle pressure regulating valve, it is necessary to provide the tested product and related control components with dry and clean medium / low pressure compressed air with a certain pressure and flow rate to ensure that the product debugging requirements are met. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an air supply system for a nozzle booster regulator test bench.

[0004] The utility model is realized through the following technical solutions.

[0005] The utility model provides an air supply system for a nozzle booster regulator test bench, comprising a low-pressure air circuit and a medium-pressure air circuit;

[0006] The low-pressure air circuit includes a low-pressure air source, which is connected to the manual air pressure regulating valve DK15, the electrical proportional valve BF12, and the low-pressure air inlet C6 of the nozzle booster regulator of the three-way solenoid valve DF38 in sequence through pipelines; the three-way solenoid valve DF38 is also connected to the electrical proportional valve DF13 through a pipeline, the electrical proportional valve DF13 is connected to the negative pressure port of the SMC vacuum generator, the compressed air inlet of the vacuum generator is connected to the electromagnetic switch valve DF39 through the manual air pressure regulating valve DK16, and the electromagnetic switch valve DF39 is connected to the low-pressure air source;

[0007] The medium-pressure air circuit includes a medium-pressure air source, which is connected to the air filter FWP6, the manual air pressure regulating needle valve DK11, the equivalent nozzle D2, and the medium-pressure air inlet C11 of the nozzle booster regulator in sequence through pipelines.

[0008] A pneumatic diaphragm regulating valve DF4 and a pneumatic diaphragm regulating valve DF5 are also connected in parallel between the air filter DWP6 and the manual air pressure regulating needle valve DK11.

[0009] A medium-pressure pressure gauge P31 and a low-pressure pressure gauge P32 are also installed on the medium-pressure air inlet of the nozzle booster regulator, and an electromagnetic switch valve DF23 is also installed between the low-pressure pressure gauge P32 and the medium-pressure air inlet of the nozzle booster regulator.

[0010] A low-pressure pressure gauge P4 is also installed on the low-pressure air inlet of the nozzle booster regulator.

[0011] The low-pressure air source is also connected to a manual air pressure regulating valve DK17, and the manual air pressure regulating valve DK17 controls the air source input of the pneumatic components.

[0012] The beneficial effects of the utility model are as follows: the low-pressure air source accurately adjusts the low-pressure air intake pressure of the boost regulator through the regulating valve, and realizes negative pressure through the SMC vacuum generator; the two pneumatic diaphragm regulating valves arranged in the medium-pressure air source can not only control the size of the medium-pressure air inlet, but also ensure the air source accuracy of the low-pressure air. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the system principle of the utility model. DETAILED DESCRIPTION

[0014] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0015] An air supply system for a nozzle booster regulator test bench comprises a low-pressure air circuit and a medium-pressure air circuit;

[0016] The low-pressure air circuit includes a low-pressure air source, which is connected to the manual air pressure regulating valve DK15, the electrical proportional valve BF12, and the low-pressure air inlet C6 of the nozzle booster regulator of the three-way solenoid valve DF38 in sequence through pipelines; the three-way solenoid valve DF38 is also connected to the electrical proportional valve DF13 through a pipeline, the electrical proportional valve DF13 is connected to the negative pressure port of the SMC vacuum generator, the compressed air inlet of the vacuum generator is connected to the electromagnetic switch valve DF39 through the manual air pressure regulating valve DK16, and the electromagnetic switch valve DF39 is connected to the low-pressure air source;

[0017] The low-pressure air source is (0.4~0.6)MPa dry compressed air, equipped with air triplex and air dryer to provide high-quality low-pressure air for products and pneumatic actuators.

[0018] The low-pressure air system is divided into three routes: the first route provides a low-pressure air power source for the product and pneumatic actuators; the second route is delivered to the fuel distributor port 6; the third route is delivered to the nozzle booster regulator port C6. The gas pressure used by the pneumatic valve is adjusted by the DK17 pressure regulating valve. The air pressure connected to the fuel distributor port C6 is controlled by the electrical proportional control valve BF14. The required pressure at the nozzle booster regulator (C6) inlet is ±20KPa air pressure; after the positive and negative air pressures are switched by the two-position three-way solenoid valve, the positive pressure of the C6 port is controlled by the electrical proportional control valve DF38, and the gas pressure is reliably controlled within the range of (0~+20)KPa. The SMC vacuum generator ZL is used to achieve negative pressure. The negative pressure of the C6 port is controlled by the electrical proportional control valve DF13, and reliable control is achieved within the range of (-20~0)KP; the adjustment accuracy of the electrical proportional valve is higher than 0.5%. In order to facilitate the adjustment of the product inlet air pressure value, a manual air pressure regulating valve is connected in series in the low-pressure air pipeline. The manual regulating valve DK15 is equipped with a fine / coarse adjustment knob.

[0019] The medium-pressure air circuit includes a medium-pressure air source, which is connected to the air filter FWP6, the manual air pressure regulating needle valve DK11, the equivalent nozzle D2, and the medium-pressure air inlet C11 of the nozzle booster regulator in sequence through pipelines.

[0020] The requirements for medium-pressure air entering the nozzle booster regulator C11 are: 0~5Mpa (absolute pressure). The nozzle booster regulator C11 air inlet requires a large medium-pressure air flow rate (4.5MPa, Q=15m3 / min). The medium-pressure air source enters the C11 port of the nozzle booster regulator through the D2 equivalent nozzle. When the required pressure entering the C11 air inlet is 1~5MPa, open the pneumatic diaphragm regulating valve QDF4, and high-pressure gas enters the C11 port; when the required pressure entering the C11 air inlet is less than 1MPa, open the pneumatic diaphragm regulating valve QDF5; in order to ensure the accuracy of low-pressure air, a manual air pressure regulating valve DK11 is connected in series in the medium-pressure air pipeline to fine-tune the air pressure; at the same time, the P31 pressure sensor is used to measure the air pressure to ensure the accuracy of the low-pressure air source. Control the air pressure entering the nozzle booster regulator to meet the test requirements of the product being tested. The design principle of the medium-pressure air system is as follows Figure 1 As shown: The pneumatic diaphragm control valve has a regulation accuracy of 1%, a diameter of DN12, and a pressure resistance of 6MPa.

Claims

1. An air supply system for a nozzle booster regulator test bench, characterized in that: Including low-pressure gas circuit and medium-pressure gas circuit; The low-pressure air circuit includes a low-pressure air source, which is connected to the manual air pressure regulating valve DK15, the electrical proportional valve BF12, and the low-pressure air inlet C6 of the nozzle booster regulator of the three-way solenoid valve DF38 in sequence through pipelines; the three-way solenoid valve DF38 is also connected to the electrical proportional valve DF13 through a pipeline, the electrical proportional valve DF13 is connected to the negative pressure port of the SMC vacuum generator, the compressed air inlet of the vacuum generator is connected to the electromagnetic switch valve DF39 through the manual air pressure regulating valve DK16, and the electromagnetic switch valve DF39 is connected to the low-pressure air source; The medium-pressure air circuit includes a medium-pressure air source, which is connected to the air filter FWP6, the manual air pressure regulating needle valve DK11, the equivalent nozzle D2, and the medium-pressure air inlet C11 of the nozzle booster regulator in sequence through pipelines.

2. The air supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: A pneumatic diaphragm regulating valve DF4 and a pneumatic diaphragm regulating valve DF5 are also connected in parallel between the air filter DWP6 and the manual air pressure regulating needle valve DK11.

3. The air supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: A medium-pressure pressure gauge P31 and a low-pressure pressure gauge P32 are also installed on the medium-pressure air inlet of the nozzle booster regulator, and an electromagnetic switch valve DF23 is also installed between the low-pressure pressure gauge P32 and the medium-pressure air inlet of the nozzle booster regulator.

4. The air supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: A low-pressure pressure gauge P4 is also installed on the low-pressure air inlet of the nozzle booster regulator.

5. The air supply system of the nozzle booster regulator test bench according to claim 1, characterized in that: The low-pressure air source is also connected to a manual air pressure regulating valve DK17, and the manual air pressure regulating valve DK17 controls the air source input of the pneumatic components.

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