Pressure-balanced pressure reducing valve

Abstract

The invention discloses a pressure-balanced pressure reducing valve. According to the pressure-balanced pressure reducing valve, a spring, a sleeve, a movable rod and a flow limiting block are combined with the pressure reducing valve, when a threaded pushing rod pushes the spring to drive the movable rod and the flow limiting block arranged on the surface of the movable rod to press downwards, the bottom of the movable rod slides in a movable cavity formed in the sleeve, so that the downward pressure of the movable rod is kept balanced, and the flow limiting block is prevented from shaking under the impact of liquid; meanwhile, forward threads, reverse threads, a first nut and a second nut are combined with the pressure reducing valve, when the first nut is loosened under the action of external force, the second nut and the first nut are opposite in movement direction, the purpose of preventing the first nut from loosening is achieved, and the connecting structure of the pressure reducing valve is optimized; and through the pressure-balanced pressure reducing valve, the accuracy of pressure balance adjustment can be improved, and the problem that a bolt arranged on a traditional pressure-balanced pressure reducing valve is prone to loosening under external factors such as vibration is solved.

Description

Technical field [0001] The invention belongs to the technical field of pressure reducing valve, and more particularly to a pressure balanced pressure reducing valve. Background technique [0002] The pressure reducing valve is adjusted to reduce the import pressure to an outlet pressure required, and relies on the energy of the medium itself, so that the outlet pressure maintains a stable valve. From the perspective of fluid mechanics, the pressure reducing valve is a throttle element that can vary, that is, by changing the throttling area, making the flow rate and the kinetic energy of the fluid, resulting in different pressure loss, thereby achieving the purpose of decompression. Then rely on control and adjustment system, the fluctuation of the rear pressure is equilibrated with the spring force, so that the rear pressure remains constant in a certain error range. [0003] The existing decompression valve structure is diverse, but there is still the following problems: [0004...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a pressure-balanced pressure reducing valve, which can improve the accuracy of pressure balance adjustment and solve the problem of poor accuracy of pressure balance adjustment in traditional pressure reducing valves.

[0008] Another object of the present invention is to provide a pressure-balanced pressure reducing valve, which can solve the problem that the bolts installed in the traditional pressure-balanced pressure reducing valve are easy to loosen under external factors such as vibration, so as to improve the pressure reducing valve. The effect of link structure

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