Gas pressure regulator

Abstract

The invention discloses a gas pressure regulator. The gas pressure regulator comprises a valve body; the valve body comprises a gas inlet, a gas outlet and diversion cavity bodies, a cutting device and a pressure regulating device are arranged on valve body, and a first valve seat and a second valve seat are arranged on the valve body; the first diversion cavity body is formed in the position, located between the gas inlet and the first valve seat, of the valve body, the second diversion cavity body is formed in the position, located between the first valve seat and the second valve seat, andthe third diversion cavity body is formed in the position, located between the second valve seat and the gas outlet; a first connecting opening is formed in the valve body, the cutting device is detachably connected to the first connecting opening, the cutting valve rod of the cutting device is arranged in the first diversion cavity body in a penetrating mode, a cutting valve clack of the cuttingdevice is arranged at the front end of the cutting valve rod, and a second connecting opening is formed in the valve body; and the pressure regulating device is detachably connected to the second connecting opening, the pressure regulating valve rod of the pressure regulating device is arranged in the second diversion cavity body in a penetrating mode, and a pressure regulating valve clack of thepressure regulating device is arranged at the front end of the pressure regulating valve rod. The gas pressure regulator is simple in structure, convenient to assemble and sensitive in cutting action.

Description

technical field [0001] The invention relates to a gas pressure regulator, which belongs to the matching equipment of urban gas transmission pipe network. Background technique [0002] During the combustion process, the gas pressure must be kept within a certain range. Too high, too low or too large fluctuations in the gas pressure may easily lead to flash explosion, misfire or flameout. The gas pressure regulator is an important equipment in the gas transmission and distribution system. The gas pressure regulator is usually set at a certain position of the gas pipeline, and automatically keeps the downstream pressure stable as the gas demand changes. When there is an abnormal change in the pressure value in the road, the gas pressure regulator can quickly act and cut off the gas supply upstream of the gas pipeline to control the gas leakage, thereby protecting the safety of the gas pipeline. [0003] At present, many gas pressure regulators on the market use built-in struct...

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Problems solved by technology

[0003] At present, many gas pressure regulators on the market adopt built-in structures. For example, a gas pressure regulator disclosed in the document whose application number is CN03269719.8 includes a valve body and a valve seat, and the valve body is provided with The cut-off mechanism and the pressure regulation mechanism that can cooperate with the inlet and outlet ends of the valve seat respectively. Since the cut-off mechanism and the pressure regulation mechanism are both located inside the valve body of the gas pressure regulator and cooperate with the same valve seat, the gas pressure regulator The structure becomes complicated, which makes assembly more difficult and inconvenient for maintenance and disassembly

In addition, because the cut-off mechanism built in the gas pressure regulator is generally driven by a connecting rod or a lever, the cut-off action is not very sensitive, the reset is inconvenient, and the processing accuracy and strength of the parts are very high. It is easy to interfere with the cut-off mechanism during operation

In order to meet the performance indicators of the gas pressure regulator and take into account the cut-off function, the structural design of the parts in the valve body is very compact, so that the opening of the valve seat cannot be set too large, but it often causes the flow of the gas pressure regulator to be small. , the outlet pressure adjustment range is narrow, and the use range of the gas pressure regulator becomes smaller, etc.

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