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On-line pressure regulating device and on-line pressure regulating method for gas transmission pipeline

A pressure regulating device and gas pipeline technology, which is applied in the pipeline system, gas/liquid distribution and storage, mechanical equipment, etc., can solve the problem that the pressure cannot be transferred relatively smoothly, the backup system cannot be put into use in time, and there is no automatic detection and protection and other issues, to achieve the effect of reducing equipment investment and construction costs, reducing construction procedures, and facilitating operation and maintenance

Active Publication Date: 2020-05-22
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are the following problems in the pressure regulation system of this cold standby mode: (1) Not all system failures can be uploaded in the form of signals. Potential safety hazards; (2) The two-way pressure regulating system is a cold standby. When the active / standby pressure regulating system needs to be switched, the active / standby switch is performed through the upstream process switch valve. At this time, the regulating valve moves violently, and the pressure cannot Relatively smooth transition, even there is a risk of overpressure after the valve; (3) The cold standby pressure regulation system relies on simple logic judgment, and has corresponding monitoring and protection for the pressure overpressure after the valve, and even cuts off the in-use pressure regulation when necessary The system is switched to the standby road, but there is no corresponding logic for automatic detection and protection for the clogging or low flow conditions of the pressure regulating system of the active road

Method used

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  • On-line pressure regulating device and on-line pressure regulating method for gas transmission pipeline

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Effect test

Embodiment 1

[0040] Example 1, such as figure 1 As shown, an online pressure regulating device for a gas transmission pipeline according to an embodiment of the present invention includes: an active pressure regulating branch pipeline 5-1 and a standby pressure regulating branch pipeline 6-1.

[0041] Both ends of the pressure regulating branch pipeline 5-1 are respectively connected with the first manifold 4 and the second manifold 7, and the pressure regulating branch pipeline 5-1 is sequentially connected with the first process ball valve 5-2, The first process belt actuator ball valve 5-3, the first monitoring pressure regulating valve 5-4, the first action pressure regulating valve 5-5, the first local temperature gauge 5-23, and the first pressure transmitter 5-24 , the second pressure transmitter 5-25, the third pressure transmitter 5-26, the first check valve 5-6 and the second process ball valve 5-7, the first monitoring pressure regulating valve 5-4 and the first The pressure tr...

Embodiment 2

[0052] Embodiment 2, an online pressure regulating method of an online pressure regulating device of a gas transmission pipeline, using the online pressure regulating device described in the embodiment, includes the following steps:

[0053] Step 1, natural gas is input into the first manifold 4, and enters the active pressure regulating branch pipeline 5-1 and the standby pressure regulating branch pipeline 6-1 respectively through the first process ball valve 5-2 and the seventh process ball valve 6-2 ;

[0054] Step 2, respectively set the first pressure controller 5-27, the second pressure controller 5-28, the first pressure high-high relay 5-29, the third pressure controller 6-27, the fourth pressure controller 6- 28 and the pressure setting value of the second pressure high-high relay 6-29, and ensure that the pressure setting values ​​of the first operating pressure regulating valve 5-5 and the second operating pressure regulating valve 6-5 are different;

[0055] Step...

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Abstract

The invention discloses an online pressure adjusting device for gas transmission pipes. The device comprises an online pressure adjusting branch pipeline and a standby pressure adjusting branch pipeline, which are respectively connected with process ball valves, process execution mechanism ball valves, monitoring pressure adjusting valves, action pressure adjusting valves, in-place temperature gauges, pressure transducers, two pressure transducers, check valves and the other process ball valves; the process execution mechanism ball valves, the monitoring pressure adjusting valves and the action pressure adjusting valves are connected with high-pressure relays, one pressure controllers and the other pressure controllers; and pressure set values of the action pressure adjusting valves on thetwo pipelines are different. The invention further provides an online pressure adjusting method for the gas transmission pipes. The device has the beneficial effects of realization of automatic online completion of online / standby pipelines in the whole switching process, stable transition and high reliability.

Description

technical field [0001] The invention relates to the technical field of gas transmission pipelines, in particular to an online pressure regulating device and an online pressure regulating method for gas transmission pipelines. Background technique [0002] The pressure regulating system is one of the important facilities of the distribution station of the gas pipeline. In order to ensure the continuous and smooth delivery of gas to the downstream, the design of the pressure regulating system is very important. In the past, the pressure regulation system mainly used in the switching mode of the road and the standby road is cold standby. valve), downstream process ball valves, pressure controllers. The process setting values ​​of the emergency cut-off valve and pressure regulating valve (monitoring pressure regulating valve + operating pressure regulating valve) in the service road and the backup road are the same. When the pressure regulating system of the road in use fails...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17D3/01
CPCF17D3/01
Inventor 聂中文孔芋丁姜念琛冯骋单超喻斌于永志龚云峰庞宝华任延光黄晶王永吉左勇
Owner BC P INC CHINA NAT PETROLEUM CORP