Forward unloading type gas path system pressure reducer

Abstract

The invention discloses a forward unloading type gas path system pressure reducer. The forward unloading type gas path system pressure reducer comprises a shell, a valve rod, an O-shaped sealing ring,a main spring and an adjusting threaded sleeve, wherein the O-shaped sealing ring, the main spring and the adjusting threaded sleeve are arranged on the valve rod, a gas inlet pipe nozzle and a gas outlet pipe nozzle are arranged on the shell, and a gap structure is formed between the bottom end of the valve rod and the shell and used for pressure reduction of the pressure reducer. The valve rodis subjected to the interaction of outlet pressure and spring force to achieve dynamic balance, and the pressure value of the main spring is controlled through the adjusting threaded sleeve. A linkagemechanism integrating a piston, an ejector rod and a valve of a traditional pressure reducer can be achieved through one valve rod, internal movable components of a forward structure are simplified,and threaded connection is avoided; and the structure is light and small. An unloading type structure is adopted, and the action of the pressure of a gas inlet on the force of the movable components is theoretically close to zero; and compared with a traditional forward pressure reducer, the forward unloading type gas path system pressure reducer has the characteristic of high precision and can beapplied to multiple fields.

Description

technical field [0001] The invention relates to the field of valves, in particular to a positive unloading type air circuit system pressure reducer. Background technique [0002] Pressure reducers are widely used in various pneumatic systems, and the requirements for outlet pressure accuracy are becoming more and more stringent. It is necessary to ensure that the volume of all products in the system is as small as possible, and to ensure that the output pressure accuracy is high, stable and reliable. Therefore, the miniaturization and precision design of the pressure reducer has broad market prospects. [0003] Such as figure 1 As shown, the reverse unloading structure pressure reducer of the prior art scheme 1, it can be seen from the figure that the movable mechanism inside the pressure reducer is composed of a valve, a valve rod, and a piston. The volume of the pressure reducer is large and needs to be passed through Above-mentioned three parts constitute movable mechan...

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Problems solved by technology

[0004] like figure 2 As shown, the structure of the positive unloading pressure reducer of the prior art scheme 2 (patent application number is: 201920578950.0_), the internal movable mechanism of the pressure reducer is composed of a valve rod, a valve, a nut, etc., and there are many parts and belts. With threaded connection, risk of loosening

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