CN2177136Y

CN2177136Y - Membrane leakage-proof valve

Info

Publication number: CN2177136Y
Application number: CN 93231947
Authority: CN
Inventors: 王德炎
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-24
Filing date: 1993-09-24
Publication date: 1994-09-14
Anticipated expiration: 2003-09-24

Abstract

The utility model relates to an improvement of a diaphragm valve. By adopting the characteristics of the diaphragm valve and a stop valve, the utility model uses a diaphragm which integrates a diaphragm piece and a valve flap into a whole to replace a traditional diaphragm piece; a tapered valve flap is matched with a valve flap base in a valve body. While in use, the goal of no leakage is achieved by the double-layer sealing between the valve flap and the diaphragm piece. The utility model has the advantages of simple structure and good sealing property, the diaphragm is made of compound materials of rubber and plastic, so that corrosion resistance, aging resistance and long service life can be achieved. The utility model is suitable for manufacturing products in various standards of Dg15 to 100.

Description

Membrane leakage-proof valve

The utility model is the improvement to membrane valve.

At present, the valve kind of selling on the market is more, wherein is the valve of seal form with the filler, and is of many uses as stop valve, ball valve, gate valve etc., but after growing service time, can produce the gap during rotation, causes valve leak; Another kind is the valve of packless seal form, and as membrane valve, pinch valve, corrugated valve etc., these valves are Leakless valve.Wherein membrane valve adaptability is better, and price is low, but this valve is to block fluid by the back band on the barrier film, and narrower because of the back band, so cuttability is relatively poor, particularly gas easily leaks gas, and working life is short.Chinese patent 90208846.7, publication number CN2086351U corrosion-resistant diaphragm valve at the problems referred to above, improves the diaphragm shape, makes the protruding sphere diaphragm towards valve body, the leakage phenomenon of unresolved valve.

For fear of above-mentioned deficiency, the purpose of this utility model is membrane valve is improved, a kind of membrane flap type Anti-leakage valve is provided, adopts the structure of membrane valve and stop valve, diaphragm and flap are combined as a whole, diaphragm is a Sealing, flap reaches good seal performance, reliable operation for by part, long service life, purpose easy to maintenance.

To achieve these goals, the utility model has been taked following technical measures.

The membrane flap type Anti-leakage valve, form by valve body, valve gap, valve rod, film lobe and operator wheel, between valve body and the valve gap diaphragm is housed, by fastening piece it is connected as a single entity, the operation handwheel is installed in valve rod one end, valve rod is provided with screw thread, match with set nut in the valve gap, be that the valve rod the other end is equipped with the film lobe outside the difference, the film lobe is separated diaphragm and flap two-part, be undulatory diaphragm and be positioned at the flap top, and with the flap of band cone be one, be provided with the flap seat in the valve body, match with the flap shape.

Another difference is that the flap tapering is 25-35 °, adopts composite rubber-plastic material to make.

Advantage of the present utility model and effect:

1, the film lobe that adopts diaphragm and flap to be structure as a whole, good seal performance has the advantage of membrane valve and stop valve.

2, the film lobe adopts composite rubber-plastic material to make, and substitutes traditional diaphragm and adds the polytetrafluoroethylene film structure by rubber membrane, and is corrosion-resistant, ageing-resistant, cost is low.

3, diaphragm adopts corrugated, increases elasticity, aperture, reliable operation.

4, applied widely, can produce Dg15-Dg100 all size product, reaching 40kgf/cm through test does not have leakage.

5, long service life, easy to maintenance.

In order to further specify characteristics of the present utility model, the utility model is described in detail below in conjunction with drawings and Examples.

Fig. 1 membrane flap type Anti-leakage valve structural representation.

Among the figure: 1 valve body, 2 fastening pieces, 3 valve gaps, 4 handwheels, 5 valve rods, 6 film lobes.

The utility model structure as shown in Figure 1, working procedure is as follows:

See the diaphragm of film lobe 6 from accompanying drawing, be installed between valve body 1 and the valve gap 3 that flap and flap seat match, threaded valve rod 5 is articulated as one with film lobe 6.When need were opened valve, pine changeed operation handwheel 4, screw thread on the valve rod and the relative movement of valve gap inner nut, and the valve rod rising drives the film lobe and moves up, and flap is separated with the flap seat, and the fluid then space between flap and flap flows out, and the in-and-out pipe of valve is communicated with.Because the flap top is provided with the corrugated diaphragm, can prevent that when valve open fluid is by place, the slit between valve rod and valve gap water clock.Throttle down, the rotating operation handwheel makes the film lobe move down flap and coincide with the flap seat of being with tapering, and this moment, in-and-out pipe was closed, owing to adopt diaphragm and flap structure, double-layer seal prevents that the race of fluid from emitting, water clock.The film lobe selects for use tartan to make.

Claims

1, a kind of membrane flap type Anti-leakage valve, by valve body (1), valve gap (3), valve rod (5), film lobe (6), operation handwheel (4) is formed, between valve body and the valve gap diaphragm is housed, by fastening piece (2) it is connected as a single entity, the operation handwheel is installed in valve rod one end, valve rod is provided with screw thread and matches with set nut in the valve gap, it is characterized in that valve rod (5) the other end is equipped with the film lobe, the film lobe is divided into diaphragm and flap two-part, be undulatory diaphragm and be positioned at the flap top, and with the band cone flap be one, valve body is provided with the flap seat in (1), matches with the flap shape.

2, membrane flap type Anti-leakage valve according to claim 1 is characterized in that the flap tapering is 25-35 °, adopts composite rubber-plastic material to make.