Nitrogen type water-attack pressure release valve system

Abstract

The invention belongs to a valve design technology, and particularly discloses a nitrogen type water-attack pressure release valve system. The nitrogen type water-attack pressure release valve system comprises a main valve, a pipeline meter, an electric control cabinet, a temperature difference stabilization bottle and a nitrogen source; a main valve inner chamber is connected with the nitrogen source and the temperature difference stabilization bottle through a valve group and pipelines; nitrogen of the main valve inner chamber is supplied by the nitrogen source; a pressure gauge for displaying setting pressure of a water-attack pressure release valve is arranged between the temperature difference stabilization bottle and the main valve inner chamber; and nitrogen pressure in the temperature difference stabilization bottle is the same as nitrogen setting pressure of the main valve inner chamber. The nitrogen type water-attack pressure release valve system is suitable for a conveying pipeline of a high-viscosity and poor-cleanliness medium; when the high-viscosity medium is conveyed, the main valve inner chamber can be filled with nitrogen rapidly, the nitrogen continuousness is good, the main valve acts and reacts sensitively, and the nitrogen type water-attack pressure release valve system is free from influence of the physical properties of the medium and is high in working environment adaptability; and the nitrogen type water-attack pressure release valve system is simple in structure and high in automation degree.

Description

technical field [0001] The invention belongs to valve design technology, in particular to a pressure relief system for long-distance transmission pipelines. Background technique [0002] In the long-distance pipeline system, due to the fast switching speed of the valve, the sudden start and stop of the pump, and the sudden blockage of the pig, the water shock pressure wave will be transmitted rapidly in the pipeline and the pressure will be superimposed on the original liquid. , resulting in local overpressure of the pipeline, vibration and possibly damage to the pipeline and station equipment. For this reason, long-distance oil pipelines usually use water hammer pressure relief valves for water hammer protection to prevent excessive pipeline pressure. [0003] For long-distance transmission pipeline systems at home and abroad, water hammer pressure relief valves are installed in the inbound and outbound pipelines of the transmission stations to protect the pipelines and av...

AI Technical Summary

Problems solved by technology

Because the angle type has the disadvantages of small discharge volume and high noise, it is rarely used

As a typical self-operated water hammer pressure relief valve, the pilot-operated water hammer pressure relief valve cannot be applied to medium pipelines with high viscosity and poor cleanliness

At the same time, the action response sensitivity of the pilot-operated water hammer pressure relief valve is limited by the physical properties of the medium itself. When the viscosity of the medium is high, the medium in the main valve cavity may not be filled or the filling process is slow, resulting in the water hammer pressure relief valve being unable to open accurately. or closed, and will affect the sealing ability of the main valve

The traditional nitrogen-type water hammer pressure relief valve is a typical representative of non-self-operated water hammer pressure relief valve, which requires a complex control system, and the maintenance time is limited by the nitrogen reserve, and regular inspections of the remaining nitrogen gas are required, so it cannot be set and used for long-term use. manned position

[0004] So far, there is no nitrogen-type water hammer pressure relief valve system that can be applied to the pipeline with high viscosity and poor cleanliness, and has the characteristics of sensitive action response, strong adaptability to the working environment, simple system, and high degree of automation.

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