Additional back pressure type safety valve discharge side test device and test method thereof

Abstract

The invention relates to an additional back pressure type safety valve discharge side test device and test method thereof. The additional back pressure type safety valve discharge side test device comprises a test container, a back pressure container, a first pipeline, a second pipeline, a first exhaust unit, a second exhaust unit and a control device; a back pressure supply pipe is arranged on the back pressure container; the test container and the back pressure container are communicated through the first pipeline, and a tested safety valve is arranged between the test container and the backpressure container; the second pipeline is communicated with the back pressure container; each of the first exhaust unit and the second exhaust unit is communicated with the second pipeline and the control device; when the tested safety valve is opened, the first exhaust unit is controlled to exhaust; when the pressure in the back pressure container is greater than the opening pressure of the second exhaust unit, the second exhaust unit is controlled to exhaust, thereby adjusting the pressure of the back pressure container until the pressure in the back pressure container is maintained at thestabilization. The additional back pressure type safety valve discharge side test device has the advantages of being simple in operation, wide in applicable range and accurate in test result.

Description

technical field [0001] The invention relates to a test device, more specifically, to an additional back pressure type safety valve discharge side test device and an additional back pressure type safety valve discharge side test method. Background technique [0002] The safety valve is a safety accessory of special equipment. According to the requirements of the national special equipment safety technical specification, the safety valve should undergo a "safety valve type test" before being manufactured by the manufacturer, and it can only be produced and used after passing the type test. [0003] One of the classifications of safety valves includes safety valves with discharge back pressure and those without discharge back pressure. Safety valves with discharge back pressure are generally used in toxic, harmful, flammable and explosive occasions. Due to the difference in working environment, the relevant requirements stipulate that: when the safety valve with discharge back ...

AI Technical Summary

Problems solved by technology

For example: the discharge pipe of the largest tested safety valve 30 in the system is DN400, and the control valve 141 and the pipe 14 on the pipeline are DN400. In this way, when the tested safety valve is DN25, the inlet pipe is DN25, and the outlet pipe remains DN400. It is difficult to control the air intake of DN25 pipeline with DN400 valve

[0010] 3. The opening of the control valve is difficult to match with the intake pipe. When the opening of the control valve 141 on the pipe is large, the amount of discharged gas is greater than the amount discharged by the safety valve 30 under test, and the pressure of the back pressure container 12 drops; The opening of the control valve 141 is small, the amount of discharged gas is less than the amount discharged by the tested safety valve 30, and the pressure of the back pressure container 12 rises; therefore, the pressure fluctuation of the back pressure container 12 is relatively large during the test

Like this, because the back pressure of back pressure container 12 fluctuates greatly, influence our type test measurement

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