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Measurement method and measurement device for closing time of valve clack

A closing time and measuring device technology, which is applied in the direction of valve devices, engine components, mechanical equipment, etc., can solve the problems of low measurement accuracy and achieve the effects of ensuring measurement accuracy, reducing errors, and ensuring accuracy

Active Publication Date: 2017-05-31
NEWAY VALVE SUZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the measurement accuracy is not high when measuring the rotation time of the disc in the prior art.

Method used

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  • Measurement method and measurement device for closing time of valve clack
  • Measurement method and measurement device for closing time of valve clack

Examples

Experimental program
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Effect test

Embodiment 1

[0050] This embodiment provides a method for measuring the closing time of the valve clack, which includes the following steps: in the absence of fluid in the valve body 1, push the valve clack 3 to the top dead center position; use external force to drive the valve clack 3 to the bottom dead center position; obtain the closing time of the valve disc 3 from the top dead center position to the bottom dead center position.

[0051] In the prior art, the following two methods are often used to measure the closing time of the disc: in the first mode, only the pneumatic actuator acts alone, and the pneumatic actuator will not drive the disc to rotate synchronously. Since the load of the pneumatic actuator is small, the closing time The precision is not enough. In the second method, the fluid in the valve body is used to push the valve disc to reach the highest position. The rise of the valve disc itself is completely driven by the fluid. However, because the flow velocity of the fl...

Embodiment 2

[0055] This embodiment provides a device for measuring the closing time of the valve clack, which includes: a push-up assembly, used to push the valve clack 3 to the top dead center position in an absence of fluid; a drop assembly, used to drive the valve clack 3 to make it Turn from the top dead center position to the bottom dead center position; the timing component 7 is used to obtain the closing time of the valve flap 3 from the top dead center position to the bottom dead center position.

[0056] By pushing up the assembly, it can be ensured that the valve clack 3 moves to the upper dead center position; by falling the assembly, it can be ensured that the valve clack 3 rotates from the top dead center to the bottom dead center in time; the timing assembly 7 and the push-up assembly and The falling components cooperate to ensure the accuracy of timing, thus effectively ensuring the accuracy of the closing time of the valve clack.

[0057] In this embodiment, the push-up co...

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Abstract

The invention provides a measurement method for the closing time of a valve clack. The measurement method comprises the following steps: pushing the valve clack to a top-dead-centre position under a fluid-less environment in a valve body; driving the valve clack to turn to a bottom-dead-centre position by virtue of an external force; and acquiring the closing time of arriving at the bottom-dead-centre position from the top-dead-centre position of the valve clack. Through the measurement method provided by the invention, the valve clack is pushed to the top-dead-centre position at first, so that the accuracy of the staring point of timing is guaranteed, and then the external force acts on the valve clack and drives the valve clack to turn to the bottom dead centre from the top dead centre. Through the abovementioned method, the position of the movement staring point of the valve clack is stabilized at the top-dead-centre position, so that the accuracy of measurement for the closing time of the valve clack is guaranteed.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a method and device for measuring the closing time of a valve flap. Background technique [0002] Check valve, also known as one-way valve or check valve, includes a valve disc, a seat ring that matches the valve disc, and end flanges on both sides of the valve body. Its function is to prevent the medium in the pipeline from flowing backward. The disc inside the check valve opens or closes the medium passage by the flow of the medium and its own gravity, and only allows the medium to flow in one direction. [0003] The steam extraction check valve is a kind of check valve. A pneumatic actuator is provided outside the valve body. The pneumatic actuator is connected to the rocker 2 inside the valve body 1, and the rocker 2 is connected to the valve disc 3. When the generator trips and the main steam valve is closed, the pneumatic actuator acts to drive the valve disc to fall and ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K37/00
CPCF16K37/0008
Inventor 周金荣刘长福王建华
Owner NEWAY VALVE SUZHOU