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Automatic pipeline valve opening-closing system

An automatic opening and closing, pipeline valve technology, applied in valve details, valve devices, engine components, etc., can solve the problems of switch signal failure, inability to observe and close normally, affecting the safety of downstream equipment, to avoid failure and ensure safe use. , the effect of ensuring safety and reliability

Active Publication Date: 2020-03-13
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of conveying high-pressure and high-temperature liquids, when the pressure in the pipeline exceeds the preset value, it is necessary to automatically open or close the valve on the pipeline, and discharge or stop the liquid in the pipeline to ensure the safety of downstream equipment. In the existing In the pipeline valve automatic closing system, the pressure switch is usually used to monitor the pipeline pressure, and then the pressure switch controls the valve to close through the solenoid valve and the pneumatic actuator according to the pressure signal, but the switch signal is often invalid due to the high working environment temperature of the pressure switch. If the situation occurs, the valve cannot be observed and closed normally, which will affect the safety of downstream equipment. Therefore, it is necessary to improve the safety and reliability of the valve automatic opening and closing system.

Method used

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  • Automatic pipeline valve opening-closing system

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Such as Figures 1 to 3 As shown, a pipeline valve automatic opening and closing system includes a valve 4 and a joint 1 installed on the pipeline, the valve 4 is connected to the pneumatic actuator 3 in transmission, and also includes an external pressure feedback mechanism 5 and an air control system 6;

[0022] The external pressure feedback mechanism 5 includes a cylinder body 52. ​​Two pistons 56 are arranged in the cylinder body 52. ​​The two pistons 56 are connected by a piston rod 53. The cylinder body 52 is divided into a first cavity by the two pistons 56. Cavity 50, second cavity 58 and third cavity 57, the first cavity 50 is connected to the joint 1 through the infusion pipeline, and the third cavity 57 is filled with hydraulic oil;

[0023] The air control system 6 includes a hydraulically controlled two-position three-way valve 63 and a first air pipe 64. The hydraulically controlled two-position three-way valve 63 is installed on the first air pipe 64 whe...

Embodiment 2

[0026] The air control system 6 also includes a gas cylinder 66, a two-position three-way solenoid valve 68, a throttle valve 60 and a pressure switch 61. The pressure switch 61 is installed on the third cavity 57, and the gas cylinder 66 passes through the second gas pipe 67 and the pressure switch 61. The third air pipe 69 is connected to both ends of the hydraulically controlled two-position three-way valve 63, a pressure reducing valve 65 is installed on the second air pipe 67, and the two-position three-way solenoid valve 68 and the throttle valve 60 are all installed on the third air pipe 69 , the pressure switch 61 controls the two-position three-way solenoid valve 68 , and the first air pipe 64 and the third air pipe 69 are connected to the pneumatic actuator 3 through the shuttle valve 601 .

[0027] Since the first cavity 50 and the third cavity 57 are isolated from each other, the two-position three-way solenoid valve 68 and the pressure switch 61 are not in contact ...

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Abstract

The invention discloses an automatic pipeline valve opening-closing system. The system comprises a valve and a connector which are installed on a pipeline, the valve is in transmission connection witha pneumatic actuator, and the system further comprises an external pressure feedback mechanism and a pneumatic control system; the external pressure feedback mechanism comprises a cylinder body, twopistons are arranged in the cylinder body, the two pistons are connected through a piston rod, the cylinder body is divided into a first cavity, a second cavity and a third cavity through the two pistons, the first cavity communicates with the connector through a liquid conveying pipeline, and the third cavity is filled with hydraulic oil; the pneumatic control system comprises a hydraulic controltwo-position three-way valve and a first air pipe, the hydraulic control two-position three-way valve is installed on a first air pipe of the pneumatic actuator connected to air source, the third cavity communicates with the control end of the hydraulic control two-position three-way valve through a hydraulic pipe, and a one-way sequence valve is installed on the hydraulic pipe. Opening and closing of the valve are controlled in a mechanical mode, and the safety and reliability of opening and closing of the valve are improved.

Description

technical field [0001] The invention relates to an automatic opening and closing system of a pipeline valve, which is used for protecting equipment downstream of the pipeline. Background technique [0002] In the process of conveying high-pressure and high-temperature liquids, when the pressure in the pipeline exceeds the preset value, it is necessary to automatically open or close the valve on the pipeline, and discharge or stop the liquid in the pipeline to ensure the safety of downstream equipment. In the existing In the pipeline valve automatic closing system, the pressure switch is usually used to monitor the pipeline pressure, and then the pressure switch controls the valve to close through the solenoid valve and the pneumatic actuator according to the pressure signal, but the switch signal is often invalid due to the high working environment temperature of the pressure switch. If the situation occurs, the valve cannot be observed and closed normally, which will affect...

Claims

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Application Information

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IPC IPC(8): F16K31/124
CPCF16K31/1221F16K31/1225F16K31/124
Inventor 张明松肖锦志王恩恒庄桥
Owner CHINA THREE GORGES UNIV
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