A kind of balance valve transient test device and transient test method

Abstract

The invention belongs to the technical field of valve test and relates to a transient test device of a balance valve. The oil outlet end of a load pump (2) is communicated with the oil inlet end in a load reversing valve (12) through a pipeline, the oil port in the load reversing valve (12) is communicated with the oil port in an oil motor (6) and the control end of a balance valve (1), the other oil port in the load reversing valve (12) is communicated with the oil outlet end of the balance valve (1), and the oil outlet end of a flow compensation device is parallelly connected to the pipeline between the other oil port of the oil motor (6) and the oil inlet end of the balance valve (1). A transient test method comprises the steps of operating a compensation reversing valve (13) to enable a compensation valve (4) to supply oil to the oil inlet end of the balance valve (1), and operating the load reversing valve (12) to enable the load pump (2) to drive load to decrease through the oil motor (6). The transient test device can perform transient test on the large-flow balance valve under the condition of small load.

Description

technical field [0001] The invention relates to a test device and a test method for valve parts, in particular to a transient test device and a transient test method for a balance valve, which belong to the technical field of valve test and detection. Background technique [0002] Balance valve refers to the pressure control valve that maintains the back pressure of the system to prevent the mechanism from overspeeding under the external load. At present, there are two conventional test methods for balancing valves, namely, steady-state performance test and transient performance test. In the transient performance test, the test system needs to be connected to the actuator, and the control pressure of the balance valve is the oil inlet pressure when the actuator is lowered. The transient performance test can verify the dynamic performance of the balance valve such as step response and minimum steady flow. Since the transient performance test needs to connect the actuator an...

AI Technical Summary

Problems solved by technology

[0009] The first purpose of the present invention is to aim at the defects and insufficiencies of the existing balance valve transient test device, which are limited by the rated test flow rate of the balance valve, require too high a tower and load weight, and cannot perform a large flow balance valve transient test. , to provide a rated test flow is not affected by the load, under the condition of a relatively fixed load, it can perform a transient test on a balance valve with a variety of rated test flows, especially a balance valve with a large rated test flow. The device is suitable for many types of balance valves, with a wide range of rated test flow, and the cost of the test device is small, the test cost is low, and the operation is convenient. It is especially suitable for low pressure and large flow balance valve tests.

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