CN2475898Y

CN2475898Y - Multifunctional pressure regulating valve

Info

Publication number: CN2475898Y
Application number: CN 01213760
Authority: CN
Inventors: 杨亚朋; 张国衡
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-30
Filing date: 2001-03-30
Publication date: 2002-02-06
Anticipated expiration: 2011-03-30

Abstract

A multi-function pressure regulating valve can be made as a pressure reducing valve and a pressure relief valve. A piston is arranged in the inner cavity of the valve body, which forms a sluice mouth. The piston is fixed and communicated on a diaphragm of the cavity wall of the valve body. The diaphragm hereof, provided with an adjustable pressure spring, is a double-layer structure where one layer is separated from the other. A closed balancing chamber is formed between the double layers, which is communicated with a working cavity through a small diameter hole channel. Advantages of the valve lie in that the balancing chamber balances the force on the diaphragm from water pressure, which prevents the pressure regulated by the pressure spring from being interfered by the force and thus improves the accuracy of the regulated pressure and reduce errors.

Description

Multi-functional pressure regulator valve

The utility model relates to a kind of pressure regulator valve, the multi-functional pressure regulator valve of the voltage stabilizing of particularly reducing pressure, pressure release.

Existing reduction valve, pressure relief safety valve, its structure is that lock stream piston is fixed on the elasticity diaphragm in the body cavity, diaphragm is fixed on the body cavity wall, the spring of dress adjustable pressure is exerted pressure to tabula in the valve cavity of diaphragm top, and mat water pressure and spring are realized decompression, pressure release to phrenic acting in conjunction.Its defective is that diaphragm bears the down pressure that upward pressure that hydraulic action produces in tabula and hydraulic action produce in the piston head upper surface simultaneously, thereby make spring be difficult to bore true adjusting for phrenic active force, therefore the pilot pressure error of reduction valve and Decompression valves is bigger, does not reach the departure that NBS requires.

The purpose of this utility model is to design a kind of pressure regulator valve, both can make reduction valve, can make Decompression valves again, and the pressure controlling error is little, and is easy to adjust.

Technical solution of the present utility model is a kind of multi-functional pressure regulator valve, be loaded in the body cavity by piston, form the lock head piece, solid rod joint is on the elasticity diaphragm, diaphragm is fixed on the body cavity wall, the spring that adjustable pressure is housed above the diaphragm constitutes, and body cavity is divided into control chamber and active chamber by tabula, and active chamber is divided into the influent stream chamber and goes out to flow the chamber by the piston brake head piece; Diaphragm is a two-layer diaphragm separated from one another, and the body cavity space between the two-layer diaphragm forms an airtight counter balance pocket, and counter balance pocket is through small aperture channel connection active chamber.

Description of drawings is as follows:

Fig. 1 is prior art reduction valve, pressure-relief valve structure schematic representation

Fig. 2 is that the multi-functional pressure regulator valve of the utility model is made the decompression venting valve structural representation.

Fig. 3 is that the multi-functional pressure regulator valve of the utility model is made the pressure relief safety valve structural representation.

The utility model further specifies as follows in conjunction with specific embodiments referring to accompanying drawing:

A kind of multi-functional pressure regulator valve, be loaded in valve body [4] inner chamber by piston [7], form lock head piece [8], piston [7] bar is fixed on the elasticity diaphragm [3], diaphragm [3] is fixed on valve body [4] internal chamber wall, spring [2] has been housed on the diaphragm [3], by the adjusting screw that connects with it [1] Regulation spring [2] diaphragm [3] is exerted pressure, body cavity is divided into the control chamber [13] of its top and the active chamber of its below by diaphragm [3], active chamber is divided into influent stream chamber [9], goes out to flow chamber [6] by piston brake head piece [8]; Diaphragm [3] is two-layer diaphragm separated from one another [10] and [12], and the body cavity space between [10], [12] two-layer diaphragm forms an airtight counter balance pocket [11], and counter balance pocket [11] is communicated with active chamber through small aperture passage [5].Piston [7] can be positioned at above or below the lock head piece [9], decides on the valve of specifically making which kind of function.

Embodiment 1, and the multi-functional pressure regulator valve of the utility model is made decompression venting valve, and referring to accompanying drawing 2, piston [7] places lock head piece [8] below, small aperture passage [5] connection counter balance pocket [11] arranged and go out to flow chamber [6].Referring to accompanying drawing 3, its working principle is: regulate by adjusting screw [1], setting spring [2] applies certain precompression to diaphragm [3], this precompression is the hydraulic pressure decompression back pressure that needs control, when the going out to flow chamber [6] hydraulic pressure and be worth of valve less than this, spring [2] mat elasticity diaphragm [3] is depressed piston [7], opens lock head piece [8], and pipe network supplies water through reduction valve; When the hydraulic pressure that goes out to flow chamber [6] was worth greater than this, hydraulic pressure holds up diaphragm [3] rose piston [7], closes lock head piece [8], treats to open when hydraulic pressure lowers again, and in this way, realizes decompression, voltage stabilizing, water supply by valve.

Embodiment 2, and the multi-functional pressure regulator valve of the utility model is made pressure release, safety valve, referring to accompanying drawing 3, piston [7] is installed on lock head piece [8] top, has small aperture passage [5] to be communicated with counter balance pocket [11] and influent stream chamber [9], referring to accompanying drawing 4, its working principle is: when the influent pressure of valve surpasses when adjusting hydraulic pressure value, the water that flows into water-inlet cavity [9] from pipe network enters counter balance pocket through small aperture passage [5], holds up piston [7], open the lock head piece, earial drainage, thus realize pressure release, guarantee the device security in valve downstream.When the intake pressure of valve was lower than the pressure that screw [1] adjusts, the hydraulic pressure of water that enters counter balance pocket through small aperture passage [5] from the influent stream chamber was less than pre-pressure of the spring, and spring [2] is depressed diaphragm [3] and piston [7] pressed down close the lock head piece, not pressure release of valve.

The utility model is owing to adopt the counter balance pocket structure of double-deck diaphragm and formation thereof.Hydraulic action is in the lower floor's diaphragm that does not contact with Regulation spring, and balance hydraulic pressure makes the pilot pressure of being adjusted by Regulation spring not disturbed by it to the effect of piston, thus the degree of accuracy that has improved pilot pressure.The pressure control error of the utility model reduction valve and Decompression valves all can the value of being up to state standards, and the control mistake value that requires than state scale value is also little by about 20%.

Claims

1, a kind of multi-functional pressure regulator valve, be loaded in the body cavity by piston, form the lock head piece, solid rod joint is on the elasticity diaphragm, diaphragm is fixed on the body cavity wall, the spring that adjustable pressure is housed above the diaphragm constitutes, and body cavity is divided into control chamber and active chamber by the tabula chamber, and active chamber is divided into the influent stream chamber and goes out to flow the chamber by the piston brake head piece; It is characterized in that: diaphragm is a two-layer diaphragm separated from one another, and the body cavity space between the two-layer diaphragm forms an airtight counter balance pocket, and counter balance pocket is through small aperture channel connection active chamber.

2, multi-functional pressure regulator valve according to claim 1 is characterized in that its counter balance pocket is through channel connection influent stream chamber, small aperture.

3, multi-functional pressure regulator valve according to claim 1 is characterized in that its counter balance pocket goes out to flow the chamber through the small aperture channel connection.