Pressure regulating valve diaphragm

Abstract

The utility model discloses a pressure regulating valve diaphragm which comprises a diaphragm body, the diaphragm body is in a circular sheet shape and is made of polytetrafluoroethylene materials, a plurality of mounting holes for fastening pieces to penetrate through are formed in the edge of the diaphragm body, an annular protrusion is arranged on the upper surface of the diaphragm body, a first annular groove is formed in the lower surface of the diaphragm body, and a second annular groove is formed in the lower surface of the diaphragm body. A plurality of second annular grooves are formed in the outer side of the first annular groove at intervals, the inner diameter of the annular protrusion is smaller than that of the first annular groove, the protruding height of the annular protrusion is larger than the concave depth of the first annular groove and the concave depth of the second annular groove, and the concave depth of the first annular groove and the concave depth of the second annular groove are smaller than the thickness of the diaphragm body. The diaphragm body is made of the polytetrafluoroethylene material, so that the corrosion resistance of the diaphragm body is improved, the sealing effect of the diaphragm body under the paint environment condition is ensured, and meanwhile, the service life of the diaphragm body is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mechanical technical field, and specifically relates to a pressure regulating valve diaphragm. BACKGROUND

[0002] The pressure regulating valve is a special valve for reducing pressure by filling high-pressure medium into a relatively large cavity through a small hole.

[0003] The traditional pressure regulating valve mainly comprises a valve body, a medium inlet and a medium outlet after pressure regulation, which are arranged on the valve body, a pressure reduction cavity between the medium inlet and the medium outlet, and a diaphragm for adjusting pressure arranged in the pressure reduction cavity.

[0004] The diaphragm is an important component inside the pressure regulating valve, and needs high sealing performance. SUMMARY

[0005] The utility model discloses a pressure regulating valve diaphragm with stable sealing performance, high corrosion resistance and long service life.

[0006] The utility model discloses the technical scheme as follows:

[0007] A pressure regulating valve diaphragm comprises a diaphragm body, the diaphragm body is in the shape of a round sheet, the diaphragm body is made of polytetrafluoroethylene material, the edge of the diaphragm body is provided with a plurality of mounting holes for fasteners, the upper surface of the diaphragm body is provided with an annular protrusion, the lower surface of the diaphragm body is provided with a first annular groove, a plurality of second annular grooves are arranged at intervals on the outer side of the first annular groove, the inner diameter of the annular protrusion is smaller than the inner diameter of the first annular groove, the protrusion height of the annular protrusion is greater than the recess depth of the first annular groove and the second annular groove, and the recess depth of the first annular groove and the second annular groove is smaller than the thickness of the diaphragm body.

[0008] Preferably, the diaphragm body, the annular protrusion, the first annular groove and the second annular groove are coaxial structures.

[0009] Preferably, the annular protrusion, the first annular groove, the second annular groove and the diaphragm body are integrated structures.

[0010] Preferably, the thickness of the diaphragm body is 0.46-0.50mm.

[0011] Preferably, the protrusion height of the annular protrusion is 1.7-1.9mm.

[0012] Preferably, the number of mounting holes is 3-5.

[0013] The diaphragm body of the utility model has the advantages of

[0014] (1) the diaphragm body of the utility model is made of polytetrafluoroethylene material, improves the corrosion resistance of the diaphragm body, guarantees the sealing effect of the diaphragm body under the paint environment condition, and prolongs the service life of the diaphragm body;

[0015] (2) the utility model discloses an annular protrusion is arranged on the upper surface of the diaphragm body, a plurality of annular grooves are arranged on the small surface of the diaphragm body, which greatly increases the elasticity of the diaphragm body as a whole, so that the proportion of the input air in the subsequent pressure regulating valve is proportional to the elastic pressure proportion of the diaphragm body, and the linear adjustment characteristic is satisfied. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is the structure schematic view of the utility model;

[0017] Fig. 2 It is the cross section schematic view of the utility model;

[0018] In the drawing, 1, diaphragm body;2, mounting hole;3, annular protrusion;4, first annular groove;5, second annular groove. DETAILED DESCRIPTION

[0019] The utility model will be further described below in combination with the drawings:

[0020] As Figs. 1-2 Indicated, the utility model discloses a kind of pressure regulating valve diaphragm, including diaphragm body 1, diaphragm body 1 is round, diaphragm body 1 is made of polytetrafluoroethylene material, improves the corrosion resistance of the diaphragm body, guarantees the sealing effect of the diaphragm body under the paint environment condition, and prolongs the service life of the diaphragm body.

[0021] The rim of the diaphragm body 1 in the utility model has a plurality of mounting holes 2 for fasteners, preferably 3-5 mounting holes 2, and further preferably 4 mounting holes 2, so that the fasteners after installation are more evenly stressed.

[0022] The upper surface of the diaphragm body 1 in the utility model is provided with an annular protrusion 3, the lower surface of the diaphragm body 1 is provided with a first annular groove 4, a plurality of second annular grooves 5 are arranged on the outer side of the first annular groove 4, preferably 2-4 second annular grooves 5, and further preferably 3 second annular grooves 5, so that the elasticity of the diaphragm body as a whole is greatly increased, so that the proportion of the input air in the subsequent pressure regulating valve is proportional to the elastic pressure proportion of the diaphragm body, and the linear adjustment characteristic is satisfied.

[0023] The inner diameter of the annular protrusion 3 is smaller than the inner diameter of the first annular groove 4, the protrusion height of the annular protrusion 3 is greater than the recess depth of the first annular groove 4 and the second annular groove 5, the protrusion height of the annular protrusion 3 is 1.7-1.9mm, preferably the protrusion height of the annular protrusion 3 is 1.8mm; the recess depth of the first annular groove 4 and the second annular groove 5 is smaller than the thickness of the diaphragm body 1, wherein the thickness of the diaphragm body 1 is 0.46-0.50mm, preferably the thickness of the diaphragm body 1 is 0.48mm.

[0024] The diaphragm body 1, the annular protrusion 3, the first annular groove 4 and the second annular groove 5 are coaxial structures.

[0025] The use process of the utility model is as follows:

[0026] In the use process of the pressure regulating valve, air pressure enters the valve body and is pushed to the middle plane of the annular protrusion 3, so that the diaphragm body 1 is deformed downward, and the deformation is proportional to the air ratio.

[0027] The other unexplained parts of the utility model are the same as the prior art.

Claims

1. A pressure regulating valve diaphragm, characterized in that The invention comprises a diaphragm body (1), wherein the diaphragm body (1) is in the shape of a disc and is made of polytetrafluoroethylene material. The edge of the diaphragm body (1) is provided with a plurality of mounting holes (2) for fasteners to pass through. The upper surface of the diaphragm body (1) is provided with an annular protrusion (3), the lower surface of the diaphragm body (1) is provided with a first annular groove (4), and a plurality of second annular grooves (5) are provided at intervals outside the first annular groove (4). The inner diameter of the annular protrusion (3) is smaller than the inner diameter of the first annular groove (4), the protrusion height of the annular protrusion (3) is greater than the recessed depth of the first annular groove (4) and the second annular groove (5), and the recessed depth of the first annular groove (4) and the second annular groove (5) is less than the thickness of the diaphragm body (1).

2. The pressure regulating valve diaphragm according to claim 1, characterized in that The diaphragm body (1), the annular protrusion (3), the first annular groove (4) and the second annular groove (5) are all coaxial structures.

3. The pressure regulating valve diaphragm according to claim 2, characterized in that The annular protrusion (3), the first annular groove (4), the second annular groove (5) and the diaphragm body (1) are an integrated structure.

4. The pressure regulating valve diaphragm according to claim 1, characterized in that The thickness of the diaphragm body (1) is 0.46-0.50 mm.

5. The pressure regulating valve diaphragm according to claim 1, characterized in that The protrusion height of the annular protrusion (3) is 1.7-1.9 mm.

6. The pressure regulating valve diaphragm according to claim 1, characterized in that The number of the mounting holes (2) is 3-5.

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