CN102720859A

CN102720859A - Floating-membrane-type solenoid valve

Info

Publication number: CN102720859A
Application number: CN201210193295XA
Authority: CN
Inventors: 吴培生
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-06-13
Filing date: 2012-06-13
Publication date: 2012-10-10

Abstract

The invention discloses a floating-membrane-type solenoid valve, mainly comprising a valve body, a valve cover, a membrane component and a guide head. The valve cover is arranged on the valve body and fixed by inner-hexagonal cylinder head screws; in addition, the membrane component is arranged between the valve cover and the valve body and the upper end of the valve cover is connected with the guide head in a spiral mode; a groove is arranged on the valve cover and a big O-shaped ring which is in contact with the end surface of the valve body is arranged in the groove; a groove is arranged on the valve body and a small O-shaped ring which is in contact with the end surface of the valve cover is arranged in the groove; two O-shaped rings are distributed in a staggered way. The solenoid valve has the beneficial effects that the membrane is arranged between the valve body and the valve cover along the edge and a gap of 0.5mm is kept between the membrane and the valve body and the valve cover, so that the membrane is not pressed tightly by the valve body and the valve cover and the membrane is capable of floating and stretching when the valve is opened or closed; the advantages of high movement reliability of rubber membranes and good fluid medium resistance of piston valves are combined.

Description

A kind of floating diaphragm formula solenoid valve

Technical field

The present invention relates to a kind of solenoid valve, relate in particular to a kind of floating diaphragm formula solenoid valve.

Background technique

At present, common diaphragm electromagnetic valve shortcoming: 1, common diaphragm electromagnetic valve adopts rubber seal, through compressing elastomer diaphragm along the limit, elastomer diaphragm is fixed and is reached sealing effect between valve body and the valve gap.In solenoid valve work, elastomer diaphragm receives the working pressure effect, pulls up and down, the bending campaign, and the action position of diaphragm is damaged easily, cracking, thereby makes the solenoid valve operational failure; 2, the elastomer diaphragm of common diaphragm electromagnetic valve because rubber material fluid-resistant working medium scope is little, through regular meeting because of the medium reason phenomenons such as expanding, shrink, break that causes elastomer diaphragm, thereby make the solenoid valve operational failure; 3, the elastomer diaphragm of common diaphragm electromagnetic valve, because rubber is of a great variety, every kind of rubber contractibility is different, needs correspondence to open how secondary die production, and is difficult to accomplish that the size that the elastomer diaphragm of every kind of material works it out is all relatively uniform; Also have, every kind of material all will be got ready the goods, and stock's volume of the circular flow is very big, takies a large amount of circulating funds; 4, the General Purpose Rubber diaphragm receives factors such as environment, time easily and wears out, and can not preserve for a long time.

Summary of the invention

The objective of the invention is to overcome the deficiency that existing technology exists, and provide a kind of diaphragm to be in quick condition, reliability is high, fluid-resistant medium property is good floating diaphragm formula solenoid valve.

The objective of the invention is to accomplish through following technological scheme; It mainly is made up of valve body, valve gap, diaphragm unit, pilot head; Described valve gap is positioned on the valve body; And fix by hexagon socket cap head screw, and being placed with diaphragm unit between valve gap and valve body, the upper end of valve gap is connected with pilot head through spiral way; On this valve gap, offer groove, in be placed with and the contacted big O type circle of valve body end face, offer groove on the valve body, in be placed with and the contacted little O type circle of valve gap end face, and this two O type circle is in staggered distribution.

As preferably, described diaphragm unit is combined pallet, diaphragm, sealing gasket through rivet by tray, and accompanies seal washer between rivet and pallet; This pallet is positioned at the shoulder hole of valve gap, and shoulder hole and pallet connect and accompany a spring, and an end of this spring contacts with described pallet, and its other end contacts with the shoulder hole inwall.

As preferably, described diaphragm is formed by the polytetrafluoroethylene material; This diaphragm places between valve body and the valve gap along the limit, and the gap about 0.5mm is arranged up and down, is the float extension state.

Beneficial effect of the present invention is: diaphragm places between valve body and the valve gap along the limit; Gap about 0.5mm is arranged up and down; Do not compressed by valve body, valve gap, ability float extension when valve switch moves is in conjunction with the high and good advantage of piston valve fluid-resistant medium property of elastomer diaphragm reliable in action property.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Label in the accompanying drawing is respectively: 1, pilot head; 2, spring; 3, rivet; 4, seal washer; 5, valve gap; 6, big O type circle; 7, big O type circle; 8, pallet; 9, diaphragm; 10, sealing gasket; 11, tray; 12, valve body; 51, shoulder hole.

Embodiment

To combine accompanying drawing that the present invention is done detailed introduction below: shown in accompanying drawing 1; The present invention mainly is made up of valve body 12, valve gap 5, diaphragm unit, pilot head 1; Described valve gap 5 is positioned on the valve body 12; And fix by hexagon socket cap head screw, and

valve gap

5 and 12 of valve bodies be placed with diaphragm unit, and the upper end of valve gap 5 is connected with pilot head 1 through spiral way; On this valve gap 5, offer groove, in be placed with and the contacted big O type circle 6 of valve body 12 end faces, offer groove on the valve body 12, in be placed with and the contacted big O type circle 7 of valve gap 5 end faces, and this two O type circle is in staggered distribution.

Described diaphragm unit is combined pallet 8, diaphragm 9, sealing gasket 10 through rivet 3 by tray 11, and rivet 3 and 8 on pallet accompany seal washer 4; This pallet 8 is positioned at the shoulder hole 51 of valve gap 5, and shoulder hole 51 connects with pallet 8 and accompanies a spring 2, and an end of this spring 2 contacts with described pallet 8, and its other end contacts with shoulder hole 51 inwalls.

Described diaphragm 9 is formed by the polytetrafluoroethylene material; This diaphragm 9 places between valve body 12 and the valve gap 5 along the limit, and the gap about 0.5mm is arranged up and down, is the float extension state.

The advantage of this diaphragm 9 is:

Diaphragm 9 is by PTFE (polytetrafluoroethylene; Being commonly called as the plastics king) material forms; The most flowing mediums of this material ability, the medium PTFE material of nearly all rubber material ability can both use, and is not subject to medium influence and produces expansions, shrink or wear out; PTFE material high-and low-temperature resistance performance is all fabulous simultaneously, and Applicable scope is extensive.

Diaphragm 9 is not owing to be to be in to compress sealing but be in quick condition, and pullling with bending when therefore not receiving the valve switch action damages, and reaches working life more than 10 times thereby significantly improve.

The primary valve sealing material can be selected as required, the optional various rubber materials of good airproof performance, the good optional PTFE material of gasproof body or liquid medium corrosivity and high and low temperature.

The present invention is not limited to above-mentioned mode of execution, no matter on its shape or material formation, do any variation, every employing structural design provided by the present invention all is a kind of distortion of the present invention, all should think within protection domain of the present invention.

Claims

1. floating diaphragm formula solenoid valve; Mainly constitute by valve body (12), valve gap (5), diaphragm unit, pilot head (1); It is characterized in that: described valve gap (5) is positioned on the valve body (12); And fix by hexagon socket cap head screw, and being placed with diaphragm unit between valve gap (5) and valve body (12), the upper end of valve gap (5) is connected with pilot head (1) through spiral way; On this valve gap (5), offer groove, in be placed with and valve body (12) the contacted big O type circle of end face (6), valve body offers groove on (12), in be placed with and valve gap (5) the contacted little O type circle of end face (7), and this two O type circle is in staggered distribution.

2. floating diaphragm formula solenoid valve according to claim 1; It is characterized in that: described diaphragm unit is combined pallet (8), diaphragm (9), sealing gasket (10) through rivet (3) by tray (11), and accompanies seal washer (4) between rivet (3) and pallet (8); This pallet (8) is positioned at the shoulder hole (51) of valve gap (5), and shoulder hole (51) connects with pallet (8) and accompanies a spring (2), and an end of this spring (2) contacts with described pallet (8), and its other end contacts with shoulder hole (51) inwall.

3. floating diaphragm formula solenoid valve according to claim 1 and 2 is characterized in that: described diaphragm (9) is formed by the polytetrafluoroethylene material; This diaphragm (9) places between valve body (12) and the valve gap (5) along the limit, and the gap about 0.5mm is arranged up and down, is the float extension state.