CN2320858Y

CN2320858Y - Pressure-relief valve

Info

Publication number: CN2320858Y
Application number: CN 98236460
Authority: CN
Inventors: 黄伟; 孙卫东
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-13
Filing date: 1998-01-13
Publication date: 1999-05-26
Anticipated expiration: 2008-01-13

Abstract

The utility model relates to a pressure-relief valve with a coaxial structure, which comprises a valve body, a valve seat, a pressure-relief chamber and an input-output liquid passage. The utility model is characterized in that a corrugated pipe is fixedly and hermetically arranged on the valve seat at the inner side of the pressure-relief chamber, the other end of the corrugated pipe is hermetically connected with an end cover, a screw thread blind hole which is connected with screw threads of a core bar is arranged on the end cover, a cone of the core bar and a center cone hole of the valve body from throttle annular space, and a liquid output hole which is connected with the pressure-relief chamber is respectively arranged in both sides of the valve seat. The utility model has the advantages of simple and compact structure, less elements, high reliability, long service life, etc.

Description

Reduction valve

The utility model belongs to valve class technical field, specifically a kind of reduction valve of coaxial configuration.

As everyone knows, reduction valve is an indispensable special valve on the pressurized container, and existing reduction valve adopts spring-loaded plunger and elastic membrane chip structure mostly, have deficiencies such as complex structure, cost height and reliability are low, particularly problems such as rubber membrane chip reduction valve ubiquity force value conformity difference and easy ageing failure.

The purpose of this utility model provides the novel reduction valve that a kind of compact structure, air-tightness have coaxial configuration well.

The purpose of this utility model is achieved in that it includes valve body, valve seat, underpressure chamber, input output fluid path, it is characterized in that fixing seal is provided with a bellows on the valve seat of inboard, underpressure chamber, the other end of the bellows end cap that is tightly connected, end cap is provided with a tapped blind hole that is threaded with core bar, core bar tapering and valve body center taper hole constitute a throttling annular space, also are respectively arranged with a fluid delivery outlet that communicates with the underpressure chamber in the both sides of valve seat.

The utility model also is included in valve seat and is provided with the jackscrew that an increase damping reduces the bellows vibration, makes bellows interior cavity and atmosphere UNICOM by adjusting jackscrew.

The utlity model has characteristics such as compact structure is simple, element is few, reliability is high, applied range, long service life.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is a sectional structure schematic representation of the present utility model

By shown in Figure 1,1 is valve body among the figure, 2 is valve seat, the left port seal welding of bellows 4 is on the valve seat 2 of fluid output terminal, its right output port center of being welded in is provided with 3 weeks of end cap of tapped blind hole along last, valve body 1 is connected with valve seat 2 sealing stationary fits, constitute the underpressure chamber cavity of bellows outside, the valve body center is provided with a tapered centre through hole, the core bar 5 of band tapered tail passes the valve body center hole and is connected with tapped blind hole on the end cap, core bar tapering and valve body center taper hole inwall constitute an adjustable throttling annular space, be respectively arranged with a fluid delivery outlet 7 that communicates with the underpressure chamber in the both sides of valve seat 2, also being provided with one on valve seat increases the jackscrew 6 that damping reduces the bellows vibration, makes bellows interior cavity and atmosphere UNICOM by adjusting jackscrew.When fluid with higher pressure when the taper annular space flows through, the pressure reduction of exocoel makes bellows produce the elastic shrinkage distortion in the bellows, drive end cap, core bar move in the chamber, thereby reduce taper annular space area rapidly, restriction coefficient and fluid resistance have been strengthened, the underpressure chamber cavity pressure falls slightly, and when bellows inside and outside differential pressure and bellows elastic stress balance, the underpressure chamber will externally keep a constant-pressure fluid supply.Can adjust the constant voltage value of reduction valve by the axial position of adjusting core bar 5.Adjust jackscrew 6 and be for fear of bellows generation work vibration and increase damping and establish.On valve body, also be provided with the outside thread 8 that is connected with pressurized container in addition.

Claims

1, a kind of reduction valve of coaxial configuration, it includes valve body, valve seat, underpressure chamber, input output fluid path, it is characterized in that fixing seal is provided with a bellows on the valve seat of inboard, underpressure chamber, the other end of the bellows end cap that is tightly connected, end cap is provided with a tapped blind hole that is threaded with core bar, core bar tapering and valve body center taper hole constitute a throttling annular space, also are respectively arranged with a fluid delivery outlet that communicates with the underpressure chamber in the both sides of valve seat.

2, reduction valve according to claim 1 is characterized in that valve seat is provided with one and increases the jackscrew that damping reduces the bellows vibration.

3, reduction valve according to claim 1 is characterized in that also being provided with on the valve body outside thread that is connected with pressurized container.