CN111238800A - Gas purification pneumatic valve test device and use method thereof - Google Patents

Abstract

The invention relates to a gas purification pneumatic valve test device, comprising a test bench, two pipes are fixedly installed on the test bench, each pipe is closed at one end and opened at the other end, the openings of the two pipes are arranged oppositely, and the pneumatic butterfly valve is placed on the two sides. Between the two pipes, the two ends of the valve body of the pneumatic butterfly valve are respectively connected to the opening of a pipe, and a pressure gauge is installed on each pipe; the air inlet of the pneumatic butterfly valve is connected to the first air source conveying pipe, and the two pipes are respectively connected with The second air source conveying pipe is connected with the third air source conveying pipe. Before the valve is reinstalled, this device is used to test the reliability and tightness of the valve's action, which prevents the equipment from going to work with illness, reduces the probability of overhaul and rework, and saves overhaul costs.

Description

A gas purification pneumatic valve test device and its use method

technical field

The invention relates to the technical field of gas purification system equipment, in particular to a gas purification pneumatic valve test device and a method for using the same.

Background technique

Gas purification system TSA system adopts pneumatic program-controlled butterfly valve as gas cut-off and conversion device. Due to the limitation of the operating environment, during the operation, there are often problems such as the valve switch not moving, not tight, etc., and 2-3 valves must be replaced every year.

Because the valve does not have the conditions for online repair, the maintenance method of dismantling and repairing is generally adopted, and the replaced valve is repaired and then reinstalled. The judgment caused some valves to be re-installed with disease, which seriously affected the quality of maintenance.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the present invention provides a gas purification pneumatic valve test device and a use method thereof.

The present invention is achieved through the following technical solutions. On the one hand, a gas purification pneumatic valve test device is provided, including a test bench, on which two pipes are fixedly installed, each pipe is closed at one end and open at the other end, and two pipes are The openings of the pipelines are arranged opposite, the pneumatic butterfly valve is placed between the two pipelines, the two ends of the valve body of the pneumatic butterfly valve are respectively connected to the opening of a pipeline, and a pressure gauge is installed on each pipeline; the air inlet of the pneumatic butterfly valve is connected to the first one. The air source conveying pipe is connected, and the two pipes are respectively connected with the second air source conveying pipe and the third air source conveying pipe.

Preferably, a flange is installed at the opening of each pipeline, and the pipeline and the valve body are connected by the flange.

Preferably, the first gas source delivery pipe is connected to the air pump, and the second gas source delivery pipe and the third gas source delivery pipe are respectively connected to different nitrogen cylinders.

On the other hand, a method for using a gas purification pneumatic valve test device is provided, comprising the following operation steps:

(1) Place the pneumatic butterfly valve to be detected between two pipelines, and complete the connection with the two pipelines;

(2) Provide the air source through the first air source delivery pipe as the switching power of the pneumatic actuator of the pneumatic butterfly valve, which is used for the switching test of the valve;

(3) When the butterfly plate of the pneumatic butterfly valve is closed, the air source is firstly conveyed to one of the pipelines through the second air source conveying pipe to simulate the operating pressure of the valve. When the required pressure value is reached, stop the air source of the second air source conveying pipe The tightness of the valve can be tested by observing the change of the pointer of the pressure gauge;

(4) The gas source is transported to another pipeline through the third gas source transport pipe in the same manner as in step (3), and the tightness of the valve can be further tested;

(5) After the inspection, remove the pneumatic butterfly valve from between the two pipes.

The beneficial effects of the present invention are:

1. Before the valve is reinstalled, the device is used to test the reliability and tightness of the valve operation, which prevents the equipment from being sick, reduces the probability of overhaul and rework, and saves overhaul costs.

2. It is suitable for the maintenance test of DN300 and DN350 valves of gas purification system, and can be extended to other specifications of valves.

3. Provide the air source through the first air source delivery pipe as the switching power of the pneumatic actuator of the pneumatic butterfly valve, which is used for the switching test of the valve.

4. When the butterfly plate of the pneumatic butterfly valve is closed, the air source is firstly conveyed to one of the pipelines through the second air source conveying pipe to simulate the operating pressure of the valve. When the required pressure value is reached, stop the air source of the second air source conveying pipe. Supply, observe the change of the pointer of the pressure gauge, that is, whether the pressure value decreases, you can test the tightness of the valve. The tightness of the valve can be further checked by transporting the gas source to another pipeline through the third gas source delivery pipe in the same way.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Shown in the picture:

1. Test bench, 2. Valve body, 3. Pipeline, 4. Second gas source delivery pipe, 5. Third gas source delivery pipe, 6. Pressure gauge, 7. First gas source delivery pipe, 8. Flange .

Detailed ways

In order to clearly illustrate the technical features of the solution, the solution will be described below through specific implementations.

A gas purification pneumatic valve test device is provided. As shown in FIG. 1, the present invention includes a test bench 1. Two pipes 3 are fixedly installed on the test bench 1. Each pipe 3 is closed at one end and open at the other end. The openings of 3 are oppositely arranged, the pneumatic butterfly valve is placed between two pipes 3, the two ends of the valve body 2 of the pneumatic butterfly valve are respectively connected to an opening of a pipe 3, and a pressure gauge 6 is installed on each pipe 3. The air inlet of the pneumatic butterfly valve is connected with the first air source conveying pipe 7 , and the two pipes 3 are respectively connected with the second air source conveying pipe 4 and the third air source conveying pipe 5 . The air source is provided through the first air source conveying pipe 7 as the switching power of the pneumatic actuator of the pneumatic butterfly valve, which is used for the opening and closing test of the valve. When the butterfly plate of the pneumatic butterfly valve is closed, the air source is firstly conveyed to one of the pipelines 3 through the second air source conveying pipe 4 to simulate the operating pressure of the valve. When the required pressure value is reached, the air source of the second air source conveying pipe 4 is stopped. The tightness of the valve can be tested by observing the change of the pointer of the pressure gauge 6, that is, whether the pressure value decreases. In the same way, the gas source is transported to another pipeline 3 through the third gas source delivery pipe 5, and the tightness of the valve can be further tested.

In this embodiment, a flange 8 is installed at the opening of each pipe 3 , and the pipe 3 and the valve body 2 are connected through the flange 8 . Flange 8 connection is a kind of detachable connection, which can flexibly disassemble and assemble the pneumatic butterfly valve according to the needs of testing experiments.

In this embodiment, the first gas source delivery pipe 7 is connected to the air pump, the second gas source delivery pipe 4 and the third gas source delivery pipe 5 are respectively connected to different nitrogen cylinders, and controlled by the pressure reducing valve on the nitrogen cylinder Nitrogen evolution.

A method for using a gas purification pneumatic valve test device, comprising the following operation steps:

(1) Place the pneumatic butterfly valve to be detected between the two pipelines 3, and complete the connection with the two pipelines 3;

(2) The air source is provided through the first air source conveying pipe 7 as the switching power of the pneumatic actuator of the pneumatic butterfly valve, which is used for the switching test of the valve;

(3) After the butterfly plate of the pneumatic butterfly valve is closed, the air source is firstly delivered to one of the pipelines 3 through the second air source conveying pipe 4 to simulate the operating pressure of the valve. When the required pressure value is reached, stop the second air source conveying pipe. 4. Supply of gas source, observe the change of the pointer of pressure gauge 6, and test the tightness of the valve;

(4) The air source is conveyed to another pipeline 3 through the third air source conveying pipe 5 in the same manner as in step (3), and the tightness of the valve can be further tested;

(5) After the detection, remove the pneumatic butterfly valve from between the two pipes 3.

Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be realized by or using the existing technology, and will not be repeated here; the above embodiments and drawings are only used to illustrate the technical solutions of the present invention, not It is a limitation of the present invention. The present invention is described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that changes, modifications, Additions or substitutions do not depart from the spirit of the present invention, and should also belong to the protection scope of the claims of the present invention.

Claims (4)

1. A gas purification pneumatic valve test device is characterized in that: comprising a test bench, two pipelines are fixedly installed on the test bench, each pipeline is that one end is closed and the other end is opened, and the openings of the two pipelines are arranged oppositely, and the pneumatic butterfly valve Placed between two pipes, the two ends of the valve body of the pneumatic butterfly valve are respectively connected to the opening of a pipe, and a pressure gauge is installed on each pipe; the air inlet of the pneumatic butterfly valve is connected to the first air source delivery pipe, and the two The pipelines are respectively connected with the second air source conveying pipe and the third air source conveying pipe. 2 . A gas purification pneumatic valve test device according to claim 1 , wherein a flange is installed at the opening of each pipeline, and the pipeline and the valve body are connected by the flange. 3 . 3. A kind of gas purification pneumatic valve test device according to claim 1 is characterized in that: the first gas source conveying pipe is connected with the air pump, the second air source conveying pipe and the third air source conveying pipe are respectively connected with different nitrogen gas bottle connection. 4. the using method of the described test device of any one of claim 1-3, is characterized in that, comprises the following operation steps: (1) Place the pneumatic butterfly valve to be detected between two pipelines, and complete the connection with the two pipelines; (2) Provide the air source through the first air source delivery pipe as the switching power of the pneumatic actuator of the pneumatic butterfly valve, which is used for the switching test of the valve; (3) When the butterfly plate of the pneumatic butterfly valve is closed, the air source is firstly conveyed to one of the pipelines through the second air source conveying pipe to simulate the operating pressure of the valve. When the required pressure value is reached, stop the air source of the second air source conveying pipe The tightness of the valve can be tested by observing the change of the pointer of the pressure gauge; (4) The gas source is transported to another pipeline through the third gas source transport pipe in the same manner as in step (3), and the tightness of the valve can be further tested; (5) After the inspection, remove the pneumatic butterfly valve from between the two pipes.

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