Rubber diaphragm

Abstract

The utility model discloses a rubber diaphragm which comprises a diaphragm body, the diaphragm body is formed by compositing an elastic layer and a tensile reinforcing layer arranged on one side of the elastic layer, an annular sealing flange is arranged on the edge of the elastic layer, a plurality of reinforcing ribs are embedded in the tensile reinforcing layer, and the annular sealing flange is provided with an annular sealing groove. The plurality of reinforcing ribs are radially distributed from the center of the elastic layer to the edge of the elastic layer, and through the composite structure of the elastic layer and the tensile reinforcing layer, both flexibility and tensile property are considered; the sealing flange enhances the edge sealing performance, and the radial reinforcing ribs prevent the diaphragm from being pressed and deformed.

Description

Technical Field

[0001] This utility model relates to the field of rubber diaphragms, and more particularly to a rubber diaphragm. Background Technology

[0002] Rubber diaphragms are characterized by high reliability, good compatibility, long service life, and low cost. They are mainly used in valves, regulating valves, automatic mechanical follow-up devices, switches, and counters for flow, pressure, differential, level, and constant temperature volumetric thermal compensation.

[0003] When using rubber diaphragms, the rubber rings are prone to damage after prolonged use. Traditional rubber diaphragms are prone to edge sealing failure and tearing caused by stress concentration in the central area under high pressure or high frequency conditions, and have poor resistance to deformation. Utility Model Content

[0004] This invention addresses the shortcomings of existing rubber diaphragms in terms of poor resistance to deformation by providing a new type of rubber diaphragm.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a rubber diaphragm, comprising a diaphragm body, wherein the diaphragm body is composed of an elastic layer and a tensile reinforcing layer disposed on one side of the elastic layer, wherein an annular sealing flange is disposed at the edge of the elastic layer, and a plurality of reinforcing ribs are embedded in the tensile reinforcing layer, wherein the plurality of reinforcing ribs are radially distributed from the center of the elastic layer toward the edge of the elastic layer.

[0006] By adopting the above technical solution, the composite structure of the elastic layer and the tensile reinforcement layer takes into account both flexibility and tensile strength; the sealing flange enhances the edge sealing performance, and the radial reinforcing ribs prevent the diaphragm from deforming under pressure.

[0007] The present invention is further configured such that: the tensile reinforcing layer is also embedded with a tensile mesh, the tensile mesh is disposed between the reinforcing ribs, and the tensile mesh is in the form of a hexagonal honeycomb mesh.

[0008] The present invention is further configured such that the end of the reinforcing rib away from the center of the elastic layer extends into the interior of the sealing flange.

[0009] By adopting the above technical solution, the strength of the edge structure is enhanced, and local tearing of the sealing flange due to stress is avoided.

[0010] The present invention is further configured such that: the elastic layer includes a central area and an edge area that wraps around the central area in a ring shape, and the edge area is gradually thickened from the side facing the central area to the edge of the elastic layer.

[0011] By adopting the above technical solution, stress abrupt change points are eliminated, and the risk of fatigue fracture is reduced.

[0012] The present invention is further configured such that: an annular anti-wear layer is provided on the side of the elastic layer away from the tensile reinforcing layer, and the anti-wear layer is connected to a portion of the edge area of ​​the elastic layer.

[0013] By adopting the above technical solution, friction loss is reduced, making it suitable for high-frequency reciprocating motion scenarios.

[0014] The present invention is further configured such that: the edge of the wear-resistant layer is provided with an L-shaped fold, and the fold is bent toward the outer side of the sealing flange.

[0015] By adopting the above technical solution, an edge protection structure is formed, preventing interlayer delamination.

[0016] The present invention is further configured such that wear-resistant particles are provided within the wear-resistant layer.

[0017] By adopting the above technical solution, wear-resistant particles increase structural strength.

[0018] The present invention is further configured such that: the cross-section of the sealing flange is trapezoidal, and the inner annular surface of the sealing flange is provided with at least one annular groove.

[0019] By adopting the above technical solution, the trapezoidal cross section increases the contact pressure of the sealing surface. When the sealing flange is squeezed, the annular groove forms a slight deformation, thereby enhancing the reliability of dynamic sealing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of one side of a rubber diaphragm in one embodiment;

[0021] Figure 2 This is a schematic diagram of the other side of a rubber diaphragm in one embodiment;

[0022] Figure 3 This is a partial cross-sectional view of a rubber diaphragm in one of the embodiments.

[0023] The parts referred to by the numbers in the above figures are as follows: 1. Elastic layer; 2. Tensile reinforcement layer; 3. Wear-resistant layer; 4. Sealing flange; 5. Annular groove; 11. Central area; 12. Edge area; 21. Reinforcing rib; 22. Tensile mesh; 31. Fold-back section. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] Example:

[0026] A rubber diaphragm, first see Figures 1 to 3The diaphragm body is composed of an elastic layer 1, a tensile reinforcing layer 2, and an anti-wear layer 3. The tensile reinforcing layer 2 and the anti-wear layer 3 are located on both sides of the elastic layer 1. The diaphragm body has a circular sheet structure. An annular sealing flange 4 is provided at the edge of the elastic layer 1. The sealing flange 4 is convex towards the tensile reinforcing layer 2. The cross-section of the sealing flange 4 is trapezoidal. At least one annular groove 5 is provided on the inner side of the sealing flange 4 facing the center. In this embodiment, only one annular groove 5 is provided. The elastic layer 1 includes a central area 11 and an edge area 12 that wraps around the central area 11 in an annular shape. The edge area 12 gradually changes from thin to thick from the side facing the central area 11 to the edge of the elastic layer 1. A vent hole for the operation of the diaphragm body is opened along the center of the central area 11.

[0027] See Figure 2 and Figure 3 The tensile reinforcing layer 2 is embedded with a number of reinforcing ribs 21, which are radially distributed from the center of the elastic layer 1 toward the edge of the elastic layer 1. The ends of the reinforcing ribs 21 away from the center of the elastic layer 1 extend into the sealing flange 4. The tensile reinforcing layer 2 is also embedded with a tensile mesh 22, which is hexagonal honeycomb mesh and is located between the reinforcing ribs 21. The reinforcing ribs 21 and the tensile mesh 22 are made of polyurethane rubber with high tensile strength. The elastic layer 1 and the tensile reinforcing layer 2 are generated by a two-stage molding technology.

[0028] See Figure 1 and Figure 3 The wear-resistant layer 3 is annular and is connected to the edge of the elastic layer 1. The edge of the wear-resistant layer 3 is provided with an L-shaped fold 31, which is bent toward the outer side of the sealing flange 4. Wear-resistant particles are provided in the wear-resistant layer 3 during molding.

Claims

1. A rubber diaphragm, comprising a diaphragm body, characterized in that, The diaphragm body is composed of an elastic layer (1) and a tensile reinforcing layer (2) disposed on one side of the elastic layer (1). An annular sealing flange (4) is provided at the edge of the elastic layer (1). A plurality of reinforcing ribs (21) are embedded in the tensile reinforcing layer (2). The plurality of reinforcing ribs (21) are arranged radially from the center of the elastic layer (1) toward the edge of the elastic layer (1).

2. The rubber diaphragm according to claim 1, characterized in that, The tensile reinforcing layer (2) is also embedded with a tensile mesh (22), which is disposed between the reinforcing ribs (21) and is in the form of a hexagonal honeycomb mesh.

3. A rubber diaphragm according to claim 1, characterized in that, The end of the reinforcing rib (21) away from the center of the elastic layer (1) extends into the interior of the sealing flange (4).

4. A rubber diaphragm according to claim 1, characterized in that, The elastic layer (1) includes a central area (11) and an edge area (12) that wraps around the central area (11) in a ring shape. The edge area (12) is gradually thickened from the side facing the central area (11) to the edge of the elastic layer (1).

5. A rubber diaphragm according to claim 4, characterized in that, The elastic layer (1) is provided with an annular anti-wear layer (3) on the side away from the tensile strengthening layer (2), and the anti-wear layer (3) is connected to a portion of the edge area (12) of the elastic layer (1).

6. A rubber diaphragm according to claim 5, characterized in that, The wear-resistant layer (3) has an L-shaped fold (31) at its edge, and the fold (31) is bent toward the outer side of the sealing flange (4).

7. A rubber diaphragm according to claim 5, characterized in that, The wear-resistant layer (3) contains wear-resistant particles.

8. A rubber diaphragm according to claim 1, characterized in that, The sealing flange (4) has a trapezoidal cross section, and the inner annular surface of the sealing flange (4) is provided with at least one annular groove (5).

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