Self-pressure-loading type pressure regulator

Abstract

The invention discloses a self-pressure-loading type pressure regulator. The self-pressure-loading type pressure regulator is mainly composed of a main pressure regulating valve and a pressure regulating controller, wherein the regulating controller is of an integrated structure formed by connecting a pilot valve and a pressure regulating valve. The self-pressure-loading type pressure regulator is structurally characterized in that combined pressure regulating and pressure stabilizing structures are assembled in the pilot valve and the pressure regulating valve respectively, wherein each combined pressure regulating and pressure stabilizing structure is formed by connecting a pilot throttling valve clack and a pressure regulating throttling valve clack in series and used for carrying out secondary throttling and dual switching-off on pressure regulating signals; after secondary throttling pressure regulating and pressure stabilizing are carried out through the pressure regulating controller, stable pressure regulating signals are input into the main pressure regulating valve for pressure regulating and pressure stabilizing work, and then the purposes of automatically regulating output gas pressure and making the output gas pressure tend to be stable can be achieved. Trials show that the self-pressure-loading type pressure regulator indeed has the outstanding advantages of being simple in structure, reasonable in design, low in production and manufacturing cost, convenient to install and use, high in pressure regulating precision, good in output gas pressure stability, high in switching-off sealing property, safe and reliable in operation and long in service life, and has excellent application and popularization prospects in the gas delivery industry.

Description

technical field [0001] The invention relates to a gas pressure regulating and stabilizing device, which belongs to the technical field of automatically adjusting the gas transmission pressure and stabilizing the output air pressure, in particular to a self-pressure loading type pressure regulator, which is especially suitable for natural gas, liquefied gas, coal gas and CNG pressure regulation It can be installed and used on gas transmission pipelines such as stations, which has a very obvious technical effect on improving the pressure stability of gas transmission and distribution. Background technique [0002] We know that with the rapid development of my country's oil and gas industry and urbanization, the construction process of urban gas transmission and distribution gas pipeline network facilities has been greatly promoted. According to the survey, at present, most cities in my country have basically established a relatively complete gas transmission and distribution n...

AI Technical Summary

Problems solved by technology

However, we have also found in our long-term research and development of pressure regulator products and market research that this traditional pressure regulator product still has some technical defects in actual operation, the main manifestations of which are: first. The pressure medium in the main pipe is only once throttled by a single command valve, and then it is introduced into the main valve capsule for pressure regulation. , the smoothness of the pressure change used as the pressure regulating gas medium is poor), which will form a severe impact and destructive force on the main regulating diaphragm

This is the main reason why the main adjustment diaphragm of the current pressure regulator is easily damaged by a large transient pressure impact and shortens the working life. , will also affect the pressure regulator's pressure regulation and stability of the output gas pressure

Second. Since the closing and sealing of the current pressure regulator is achieved by the sealing ring that the valve core is pressed against the upper end surface of the valve port, the sealing ring will be damaged by the erosion and corrosion of the high-pressure and high-speed airflow during the pressure regulating operation, and it will fail, especially Impurities in the gas medium are easily adhered to the surface of the sealing ring and the sealing performance is reduced, which is one of the main reasons for the long-term existence of "poor closing and sealing performance" in the current pressure regulator.

This is also the long-term gas leakage phenomenon of "even if it is in the closed state, sometimes a small amount of gas leaks into the downstream pipeline" in the current pressure regulator products. Smaller, for a long time, it has not attracted great attention in the pressure regulator industry. In fact, this is a potentially dangerous production safety hazard in the gas transmission pipeline network equipment system

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