CN85205027U

CN85205027U - Gas valve without leakage

Info

Publication number: CN85205027U
Application number: CN 85205027
Authority: CN
Inventors: 李铁民; ***
Original assignee: Individual
Current assignee: Individual
Priority date: 1985-11-21
Filing date: 1985-11-21
Publication date: 1987-03-11

Abstract

The utility model discloses a gas valve without leakage which is a small-size diaphragm stop valve. The utility model is characterized in that a valve stem is an adjusting screw with a handle. A valve gate can shut only by impacting a rubber diaphragm. The on-off of the rubber diaphragm is completed by a spring back device which is arranged under the rubber diaphragm and mainly made of springs. The utility model has the advantages of long service life, labour saving, easy manufacturing low cost, reliable sealing performance and good fine adjustment performance, being suitable to the pipe lines of family coal gas, natural gas, marsh gas, etc.

Description

Gas valve without leakage

No leakage gas valve is a kind of microdiaphragm formula stop valve.

General home-use rock gas, coal gas, biogas valve, mostly adopt general needle value, stopcock or ball valve etc., these valves adopt packing seal, behind the use certain hour, can produce leakage phenomenon, open and close shortcomings such as moment is big, fine setting poor performance, cost height simultaneously in addition.

For solving the shortcoming of prior art, the inventor once succeeded in developing the microdiaphragm valve of a kind of called after at that time " new type natural air valve " in 1975.Hereinafter be called this valve of 75 types " new type natural air valve " temporarily and come down to a kind of formula atresia disc diaphragm of rubber valve of washing open, when what is called is washed formula open and is meant the unlatching of valve, be to wash diaphragm of rubber open by the pressure of rock gas, rather than by valve rod lifting diaphragm of rubber, it had extraordinary sealability to this valve through confirmation on probation in nearly ten years, good fine setting performance, life-span length, rapid operation, easy processing, advantage such as with low cost.But also exist a critical defect to be: gas can not be washed diaphragm of rubber fully open when natural atmospheric pressure is low, and causes the not smooth problem of ventilation.

The purpose of this utility model is to improve 75 types " new type natural air valve ", keeps its advantage and overcomes its shortcoming, improves the unlatching ability of diaphragm of rubber.

The utility model is to realize by set up a resilient mounting based on spring below the diaphragm of rubber of 75 types " new type natural air valve ".

No leakage gas valve has the valve gap of center screw by an inner chamber and valve seat being arranged and advancing, arrange the valve body that passage constitutes, compositions such as adjusting screw, pressure cap, atresia disc diaphragm of rubber.Of the present utility model be characterised in that atresia disc diaphragm of rubber below, a resilient mounting that diaphragm of rubber is opened that mainly is made of spring is arranged.Adjusting screw can only compress diaphragm of rubber by pressure cap and make valve closing, and the unlatching of diaphragm of rubber is to finish by the elastic force of the resilient mounting that mainly is made of spring below the diaphragm of rubber.

The resilient mounting that diaphragm of rubber is opened can have multiple structural type, fairly simple is to adorn a cylindrical helical spring in valve seat orifice reliably, the spring upper end directly contacts with diaphragm of rubber, there is the lever of the valve seat orifice of crossing the lower end of spring so that the spring location, in order to reduce the extrusion stress of spring and diaphragm of rubber contacting point, can be at the additional Shim in the end of spring.

Simpler resilient mounting is the spring that thin slice shape of installation has internal tooth below diaphragm of rubber, and diaphragm of rubber is opened.

Another resilient mounting is Shim that endoporus is arranged that right angle side is arranged of configuration below diaphragm of rubber, and a plurality of at least three small cylindrical helical springs are arranged below this Shim, and these springs are contained in the valve seat circular hole on every side.Spring in this scheme also can make a helical spring in the big circular groove that is sleeved on around the valve seat into.

The utility model has kept the advantage of 75 types " new type natural air valves " so sealability is very reliably arranged, good fine setting performance, life-span length, rapid operation, easy processing, advantage such as with low cost can guarantee also that under very low gas pressure air-flow is unobstructed simultaneously.

The utility model can be illustrated better by the following example:

Embodiment 1: referring to Fig. 1.

Present embodiment is by an inner chamber and valve seat being arranged and advancing, the valve body of exhaust passage (1), the valve gap (2) that central hole is arranged, adjusting screw (3), pressure cap (4), atresia disc diaphragm of rubber (5), be contained in the helical spring (6) in the valve seat orifice, pin (7) is formed, in order to prevent that the adjusting screw adjusting screw (3) that comes off out from becoming the coaxial line articulated structure with pressure cap (4), diaphragm of rubber (5) is pressed on the interior ring shape platform of valve body (1) by valve gap (2), screw adjusting screw (3) compressing pressure cap (4) during operation, pressure cap presses diaphragm of rubber (5) that valve seat orifice is sealed and throttle down.As loose modulation joint screw (3), adjusting screw is mentioned pressure cap, but can not promote diaphragm of rubber (5), and the unlatching of diaphragm of rubber (5) is to rise by the elastic force that is contained in the spring in the valve seat orifice below it, thereby make valve opening, Shim (13) is in the upper end of spring (6).

Embodiment 2: referring to Fig. 2, Fig. 3.

Present embodiment 2 and embodiment's 1 different being in the tapped hole of taking over the road in side of valve body.The spring of resilient mounting is the spring (8) that a thin slice shape has internal tooth.

Embodiment 3: referring to Fig. 4.

Present embodiment 3 and embodiment 1 be different to be in the small diameter cylinders spring (10) that by the thin slice shape that right angle side is arranged the pad (9) of endoporus is arranged and be contained in its below in resilient mounting and to constitute.

Embodiment 4: referring to Fig. 5.

Present embodiment 4 and embodiment 3 different be in the thin slice shape that right angle side is arranged have endoporus pad (11) below be a helical spring (12) that is enclosed within around the valve seat.

Claims

1, no leakage gas valve is a kind of small-sized stop valve, is made up of the valve body [1] that has an inner chamber and valve seat and inlet and outlet passage to constitute, the valve gap [2] that center screw is arranged, adjusting screw [3], pressure cap [4], atresia disc diaphragm of rubber [5] etc.Of the present utility model be characterised in that atresia disc diaphragm of rubber [5] below, a resilient mounting that diaphragm of rubber [5] is opened that mainly is made of spring is arranged.

2, according to the no leakage gas valve of claim 1, it is characterized in that resilient mounting by be contained in its cylindrical helical spring (6) that contact with diaphragm of rubber (5) of upper end in the valve seat orifice and cross valve seat orifice and with pin (7) formation of cylindrical helical spring (6) time end in contact, the Shim of its edge on the Spring Steel Wire can be arranged in the upper-end surface of this helical spring (6).

3,, it is characterized in that resilient mounting has the spring (8) of internal tooth to constitute by the thin slice shape that is installed in below the atresia diaphragm of rubber according to the no leakage gas valve of claim 1.

4, according to the no leakage gas valve of claim 1, it is characterized in that the thin slice shape that right angle side is arranged below the diaphragm of rubber (5) has the pad (9) of endoporus to resilient mounting and a plurality of at least three cylindrical helical springs (10) of being configured in below the pad (9) are formed by being installed in, packs in the valve seat circular hole on every side in the lower end of these small cylindrical helical springs (10).

5,, it is characterized in that resilient mounting is by the thin slice shape pad (11) that right angle side is arranged be configured in the helical spring (12) that below the pad (11) one is enclosed within around the valve seat and constitute according to the no leakage gas valve of claim 1.