CN2338566Y

CN2338566Y - Diaphragm for pneumatic diaphragm adjusting valve

Info

Publication number: CN2338566Y
Application number: CN 98215104
Authority: CN
Inventors: 陈平
Original assignee: Lin-An Standard Plastic & Rubber Fittings Factory Hangzhou
Current assignee: Lin-An Standard Plastic & Rubber Fittings Factory Hangzhou
Priority date: 1998-05-29
Filing date: 1998-05-29
Publication date: 1999-09-15
Anticipated expiration: 2008-05-29

Abstract

The utility model relates to a diaphragm used for a diaphragm air chamber in a pneumatic diaphragm adjusting valve. The utility model overcomes the defect that the diaphragm has to be compressed by rubber clamping a cloth layer and is composed by the adaptation of pressing a rubber layer and one cloth layer. Material reinforcing cloth is moved to the stress position of a surface layer from an interlayer. Thus the product can bear larger pressure, the bursting strength can be more than 2.0MPa, the quality control in convenient in the manufacture process, the material is also saved and the sensitivity of the work of reciprocating movement is improved.

Description

The diaphragm that pneumatic diaphragm control valve is used

The utility model relates to the barrier film that the film air chamber is used in the pneumatic diaphragm control valve.

For a long time reciprocating diaphragm in the pneumatic diaphragm control valve has been formed a kind of prejudice, must insert and put the layer of cloth compacting with rubber forms, tradition is exactly thisly to insert and put that ripple is worn in its work that the layer of cloth compacting forms or not with the pie-shaped piece of ripple with rubber at the diaphragm of usefulness, country has technical standard order specially, interlayer cloth must place the centre of two-layer rubber, and must not exist interlayer cloth to expose product surface, its burst strength 〉=0.9MP _aThe major defect of this structure diaphragm is: in process of production, intermediate course cloth is easy to the concave surface generation war proclamation phenomenon at the ripple place; Also be easy to produce folding, be difficult for again in check, being found, and cause up-to-standard rate to descend, influence the intensity and the working life of product.

The purpose of this utility model is to overcome technology prejudice, the diaphragm that provides the pneumatic diaphragm control valve of a kind of materials province, intensity height, yield rate height, working sensitivity height, long service life to use.

The utility model is based on effect and the reciprocating force-bearing situation and reinforcing material interlayer be arranged in single face top layer of diaphragm in pneumatic diaphragm control valve, and it is the pie-shaped piece that main one deck rubber layer and the compacting of one deck cloth form.

The working surface of pie-shaped piece can be with ripple also can not be with ripple.Usually the inner concave that makes pie-shaped piece is a layer of cloth, and outer convex surface is a rubber layer, is beneficial to further improve strength.

The utility model has been owing to moved on to stressed position, top layer with reinforcing material cloth from interlayer, thereby makes product can bear higher pressure, and the testing surface burst strength can reach 2.0MP _aMore than, simultaneously, also be convenient to detect intuitively whether quality problems such as folding of layer of cloth in process of production, help guaranteeing product percent of pass, the utility model has not only been saved material owing to reduce one deck rubber layer, and because of the product thickness minimizing, the damping of diaphragm in to-and-fro motion reduced, thereby improved working sensitivity, prolong working life.

Description of drawings:

Fig. 1 is a kind of concrete structure of the utility model;

Fig. 2 is the A-A sectional drawing of Fig. 1;

Fig. 3 is the another kind of concrete structure of the utility model;

Fig. 4 is the B-B sectional drawing of Fig. 3;

The diaphragm of using with reference to Fig. 1, Fig. 2, pneumatic diaphragm control valve is the pie-shaped piece that is formed by one

deck rubber layer

1 and 2 compactings of one deck cloth, in the illustrated example, the working surface of pie-shaped piece has ripple, and the inner concave of pie-shaped piece is a layer of cloth, outer convex surface is a rubber layer, and 3 for installing the hole that diaphragm is used among the figure.

The diaphragm that Fig. 3, pneumatic diaphragm control valve shown in Figure 4 are used is that its working surface of being pressed into by one deck rubber layer 1 and one deck cloth 2 is not with the pie-shaped piece of ripple

Claims

1. the diaphragm used of pneumatic diaphragm control valve is characterized in that it being the pie-shaped piece that is formed by one deck rubber layer [1] and one deck cloth [2] compacting.

2. the diaphragm of using by the described pneumatic diaphragm control valve of claim 1 is characterized in that the working surface of pie-shaped piece has ripple.

3. the diaphragm of using by claim 1 or 2 described pneumatic diaphragm control valves, the inner concave that it is characterized in that pie-shaped piece is a layer of cloth, outer convex surface is a rubber layer.