CN2625678Y

CN2625678Y - Diaphragm electromagnetic valve

Info

Publication number: CN2625678Y
Application number: CN 03255648
Authority: CN
Inventors: 单谟君; 单军波
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-07-16
Filing date: 2003-07-16
Publication date: 2004-07-14
Anticipated expiration: 2013-07-16

Abstract

A membrane type electromagnetic valve of a pneumatic element area is provided, relating to an electromagnetic valve designed for a pilot type sliding valve which is not suitable to be used in oxygen generating equipments. The key design points is that: two pilot valve components are arranged on a valve body and two corresponding membrane type components are arranged inside the valve body; every set of the membrane type components are communicated with a R cavity and a P cavity of an air inlet mouth with a working mouth a (b); an upper membrane and a lower membrane are sleeved on an upper end and a lower end of the valve rod and fixed by an upper pressing plate and a lower pressing plate respectively, which are respectively arranged on an upper lug boss mouth and a lower lug boss mouth. The electromagnetic valve transmits an air source generated in an oxygen generator equipment into the P cavity and the R cavity of the air inlet mouth and makes the membrane connecting the valve rod by pressure difference to form an interaction and various working mouths of valves to seal up, which realizes a change of the main valve use air pipeline. Compared with the original piston or a restoring spring, the membrane type electromagnetic valve has the advantages of good sealing performance and reliable change, etc, which is a relatively ideal electromagnetic valve in current medical and health care oxygen generator equipments.

Description

Diaphragm electromagnetic valve

Technical field

The utility model relates to the pneumatic element field

Background technique

Normally used solenoid valve belongs to the slide column type structure on the former health-care medical oxygen generating plant, also claims pilot operated spool valve.The solenoid valve of this structure is applied in the pneumatic system can " handy ", and use just seem " unable to do what one wishes " on oxygen generating plant.Because pneumatic system pressure is higher, oxygen generating plant belongs to lowpressure, the operating mode of fuel feeding, big flow, high frequency, high temperature not, so slide column type structure using effect is undesirable.

The working pressure that oxygenerator uses is generally all about 0.18MPa, and the minimum working pressure of pilot operated spool valve structure is generally 0.15-0.17MPa, near the threshold state of the working pressure of equipment, and because the output gas of oxygenerator is that human body directly smokes, source of the gas can not contain lubricant oil.It is dumb easily to cause main valve to switch; Along with the passing of operating time, the switching rapidly of gas causes that operating ambient temperature rises, makes the Sealing of elastic sealing structure to expand, and causes main valve stuck, causes the generation of operation troubles.In addition, the guiding valve of clearance seal structure, though long service life exists the same problem except that starting air pressure, also there is certain leakage rate in main valve, thereby system oxygen rate is reduced, oxygen concentration is not enough, does not reach former designing requirement.

Summary of the invention

The purpose of this utility model is to related domain, provides a kind of design comparatively reasonable, the diaphragm electromagnetic valve that structure is comparatively compact.Now in conjunction with the following drawings, its feature is described as follows:

Diaphragm electromagnetic valve mainly is made up of pilot valve assembly, cover plate, valve body, top board, upper diaphragm, valve rod, following diaphragm, press table, jump ring etc., and wherein top board, upper diaphragm, valve rod, following diaphragm, press table, jump ring constitute the diaphragm type assembly; It is characterized in that on valve body 4, being provided with two pilot valve assemblies 1, in valve body, be provided with corresponding two groups of diaphragm type assemblies; Every group of diaphragm type assembly and a (b) working hole 14, suction port P chamber, the R chamber communicates; Be provided with lower convex platform mouth 12, epirelief entablature 13 in the valve body, valve rod 8 places between lower convex platform mouth and the convex platform, and the valve rod underpart is with down diaphragm 9, and its upper end portion is with upper diaphragm 7; Upper diaphragm is compressed by top board 6, and the central part of top board is by 5 sealings of O shape circle, and following diaphragm is compressed by press table 10, and is blocked mutually by jump ring 11 location.

Another scheme of diaphragm type assembly is can meet odd number in valve body, meet the buildup film tab members of even numbers, and be equipped with corresponding pilot valve assembly.This diaphragm electromagnetic valve has changed the conventional construction form, adopts upper and lower pair of diaphragm structure, is connected by valve rod between diaphragm, forms interactive; The sealing between sealing, body cavity and the external world between each working hole of valve and the switching of main valve realize by upper and lower diaphragm.Compare with conventional spool valves, have following some superiority.Under the effect of atmospheric pressure difference, bending deflection realizes by diaphragm up and down in the switching of main valve.The control piston and return piston or the Returnning spring that have replaced original pilot operated spool valve; The sealing of each working hole realizes and can not work under the fuel feeding state by the sealing between diaphragm and boss.Avoid the stuck phenomenon of main valve; Sealing between the body cavity and the external world has made full use of the inherent structure of diaphragm, adopts the inclined-plane sealing between pressing plate and diaphragm, has both fixed the rigging position of diaphragm, plays seal action again.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that schematic representation is looked on Fig. 1 right side;

Fig. 3 is the A-A sectional view among Fig. 1.

Fig. 4 is following diaphragm plan view;

Fig. 5 is the B-B sectional view among Fig. 4.

Fig. 6 is the upper diaphragm plan view;

Fig. 7 is the C-C sectional view among Fig. 6.

Fig. 8 is a fundamental diagram of the present utility model.

The sequence number of above accompanying drawing and title: 1, pilot valve assembly, 2, cover plate, 3, screw, 4, valve body, 5, O shape circle, 6, top board, 7, upper diaphragm, 8, valve rod, 9, diaphragm down, 10, press table, 11, jump ring, 12, lower convex platform, 13, convex platform, 14, a (b) working hole, 15, steel ball.

Embodiment

According to design output, the function of this diaphragm electromagnetic valve is a two-position four-way valve, and actual is to constitute (as shown in Figure 8) by two groups of two position three-way valves, also can use as two position three-way valve separately.Concrete mode is 1) source of the gas feeding suction port P chamber, the cavity of resorption of following diaphragm just has suitable air pressure, and the epicoele of upper diaphragm communicates with barometric pressure by the pilot valve assembly this moment, utilize pressure difference, together with moving on the upper diaphragm, the sealing surface of following diaphragm is blocked the lower convex platform mouth of valve body to following diaphragm by valve rod, and suction port P and a (b) working hole is cut off, and the sealing surface of upper diaphragm leaves the epirelief entablature of valve body, and a (b) working hole is communicated with the R chamber.2) after the pilot valve assembly feeds voltage rating, pilot valve is opened, the source of the gas in suction port P chamber enters the epicoele of upper diaphragm by guide's gas circuit hole of main valve, the compression area of upper diaphragm is greater than the cavity of resorption of following diaphragm, utilize the pressure difference upper diaphragm to move down together with following diaphragm, make main valve switch by valve rod.The sealing surface of upper diaphragm is blocked the epirelief entablature of valve body at this moment, and a (b) working hole and R chamber are cut off.The sealing surface of following diaphragm leaves the lower convex platform mouth of valve body, and suction port P is communicated with a (b) working hole.3) the two-position four-way function realizes by the coil exchange power on/off of two pilot valves.

Shi Zhi JEL-MP-08 diaphragm electromagnetic valve parameter is as follows first:

Interface shapes such as interface thread: G1/4, G1/8, M10X1;

Pressure range: 0.1-0.3MPa;

Service voltage: DC:24V, 12V etc.; AC:36V, 110V, 220V etc.;

Ambient temperature :-10-100 ℃;

Latus rectum: 〉=φ 6.

Claims

1, diaphragm electromagnetic valve mainly is made up of pilot valve assembly, cover plate, valve body, top board, upper diaphragm, valve rod, following diaphragm, press table, jump ring etc., and wherein top board, upper diaphragm, valve rod, following diaphragm, press table, jump ring constitute the diaphragm type assembly; It is characterized in that on valve body (4), being provided with two pilot valve assemblies (1), in valve body, be provided with corresponding two groups of diaphragm type assemblies; Every group of diaphragm type assembly and a (b) working hole (14), suction port P chamber, the R chamber communicates; Be provided with lower convex platform mouth (12), epirelief entablature (13) in the valve body, valve rod (8) places between lower convex platform mouth and the convex platform, and the valve rod underpart is with down diaphragm (9), and its upper end portion is with upper diaphragm (7); Upper diaphragm is compressed by top board (6), and the central part of top board is by O shape circle (5) sealing, and following diaphragm is compressed by press table (10), and is blocked mutually by jump ring (11) location.

2, diaphragm electromagnetic valve according to claim 1 is characterized in that another scheme of diaphragm type assembly is, can meet odd number in valve body, meet the buildup film tab members of even numbers, and be equipped with corresponding pilot valve assembly.