A diaphragm mounting structure

Abstract

The utility model discloses a diaphragm mounting structure, including pressure transmitter, pressure transmitter inside is equipped with installation cavity, the diaphragm is fixedly arranged in the installation cavity, the diaphragm both sides surface is provided with first annular gasket and second annular gasket respectively, first annular gasket, diaphragm, second annular gasket are overlapped gradually and form diaphragm assembly, diaphragm assembly is fixed in the installation cavity through the welding mode.

Description

Technical Field

[0001] This utility model relates to the field of pressure transmitter technology, specifically to a diaphragm mounting structure. Background Technology

[0002] In the field of fluid pressure measurement, pressure transmitters, as core measuring devices, need to convert fluid pressure signals into detectable mechanical deformation through elastic elements, thereby achieving accurate sensing and conversion of pressure parameters. Diaphragms, as key elastic elements, are often used to isolate the fluid being measured from the internal sensing mechanism of the transmitter. Simultaneously, leveraging their own elastic properties, they convert pressure changes into controllable displacement, making them a core component ensuring pressure transmission efficiency and measurement accuracy. They are widely used in the pressure sensing and isolation structures of various pressure transmitters.

[0003] To meet the requirement of sensitive response to pressure changes, these types of diaphragms often employ a thin-walled structure design. During installation, welding is a common fixing method to ensure the sealing performance and connection strength between the diaphragm and the transmitter body. However, because the diaphragm itself is extremely thin and mostly made of metal, the localized high temperatures during welding can easily cause the diaphragm to overheat, resulting in defects such as weld burn-through and damage, rendering the diaphragm unusable. Utility Model Content

[0004] In view of this, the present invention provides a diaphragm mounting structure, the purpose of which is to solve the problem of easy weld burn-through during diaphragm welding.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A diaphragm mounting structure includes a pressure transmitter with an internal mounting cavity. A diaphragm is fixedly mounted inside the mounting cavity. A first annular gasket and a second annular gasket are respectively provided on both sides of the diaphragm. The first annular gasket, the diaphragm, and the second annular gasket are sequentially stacked to form a diaphragm assembly. The diaphragm assembly is fixed to the mounting cavity by welding.

[0007] Using the above structure, a first annular gasket and a second annular gasket are placed on both sides of the diaphragm, and the diaphragm assembly is formed by stacking them together before welding it into the mounting cavity. The gaskets on both sides clamp and support the diaphragm. During welding, the heat is absorbed and dispersed by the gaskets, reducing the heat input directly borne by the diaphragm, thereby reducing the risk of the thin diaphragm being welded through.

[0008] Preferably, the outer edges of the first annular gasket, the diaphragm, and the second annular gasket are aligned. This structure facilitates welding, further reduces the possibility of the diaphragm being partially welded through, and ensures a continuous and intact sealing surface after welding, thus enhancing the sealing performance of the installation structure.

[0009] Preferably, the diaphragm includes a corrugated working area and an installation area extending outward from the working area, with the first and second annular gaskets fixed to both sides of the installation area by welding. This structure avoids affecting the elastic deformation of the diaphragm.

[0010] Preferably, the mounting cavity is provided with an annular support portion along its circumference, and the annular support portion has an inwardly extending annular groove formed circumferentially. The shape of the annular groove is adapted to the first annular gasket. The edge of the diaphragm assembly is fixedly welded to the side wall of the mounting cavity, and the end of the first annular gasket away from the diaphragm is welded and fixed in the annular groove. This structure achieves radial positioning of the diaphragm assembly, prevents the diaphragm assembly from shifting during welding, improves connection strength, and enhances the overall sealing performance.

[0011] Preferably, the outer end of the inner wall of the mounting cavity is provided with a limiting step, and the outer end of the second annular gasket is provided with a limiting part that protrudes radially outward, the limiting part being welded to the limiting step. This structure provides axial limiting for the diaphragm assembly, improves connection strength, and enhances the overall sealing performance.

[0012] Preferably, both the first annular gasket and the second annular gasket have a thickness exceeding the corrugation height of the working area. This structure protects the working area of ​​the diaphragm, preventing interference between the corrugations of the working area and external structures or other components within the mounting cavity.

[0013] Preferably, the first annular gasket, the diaphragm, and the second annular gasket are welded together to form the diaphragm assembly. This structure ensures the sealing performance of the diaphragm after installation.

[0014] Preferably, a cover plate is fixedly welded to the outer end of the mounting cavity, and an annular step is provided at the inner end of the cover plate. The right end of the second annular gasket is welded and fixed to the annular step. This structure reinforces the diaphragm assembly axially, improving the overall sealing performance and anti-interference capability of the pressure transmitter.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. First and second annular gaskets are welded to both sides of the diaphragm to form the diaphragm assembly before further welding. The gaskets on both sides can absorb and disperse heat during the welding process, reducing the heat input directly borne by the diaphragm, fundamentally reducing the risk of the thin diaphragm being welded through, and ensuring the structural integrity of the diaphragm.

[0017] 2. The annular groove in the mounting cavity adapts to the first annular gasket to achieve radial positioning, and the limiting step cooperates with the limiting part of the second annular gasket to achieve axial positioning. The two positioning structures work together to ensure the stability of the diaphragm assembly position, enhance the connection strength between the diaphragm assembly and the mounting cavity, and further ensure the sealing performance of the overall structure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of diaphragm assembly A in its installed state;

[0020] Figure 3 This is an exploded view of diaphragm assembly A;

[0021] Figure 4 This is a schematic diagram of the diaphragm assembly A. Detailed Implementation

[0022] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0023] like Figure 1 and Figure 4 As shown, a diaphragm mounting structure includes a pressure transmitter B, with a mounting cavity 4 inside the pressure transmitter B. A diaphragm 1 is fixedly mounted inside the mounting cavity 4. A first annular gasket 2 and a second annular gasket 3 are respectively mounted on both sides of the diaphragm 1. When the three are stacked, their edges are aligned to form a structurally regular diaphragm assembly A. During welding, the gaskets can effectively disperse the welding heat, preventing the diaphragm 1 from being burned through or damaged due to localized high temperatures, and ensuring a uniform fusion area, thus reducing welding defects.

[0024] like Figure 3 As shown, the diaphragm 1 includes a corrugated working area 1b and an installation area 1a extending outward from the working area 1b. The installation area 1a is horizontal, and the working area 1b can undergo elastic deformation under pressure. The first annular gasket 2 and the second annular gasket 3 are fixed to both sides of the installation area 1a by welding, avoiding the working area 1b. This not only avoids interfering with the elastic deformation response of the diaphragm 1 to pressure, but also enables stable welding assembly by utilizing the horizontal structure of the installation area 1a, thereby strengthening the structural strength of the diaphragm assembly A.

[0025] like Figure 2As shown, the mounting cavity 4 is provided with an annular support portion 4a along its circumference. The annular support portion 4a forms an inwardly extending annular groove 4b, the shape of which is adapted to the first annular gasket 2. During installation, the end of the first annular gasket 2 away from the diaphragm is inserted into the annular groove 4b and welded in place. This, combined with the welding of the edge of the diaphragm assembly A to the sidewall of the mounting cavity 4, provides a dual constraint on the diaphragm assembly A from both radial and circumferential directions, preventing radial displacement during the welding process.

[0026] like Figure 2 As shown, a limiting step 4c is provided at the outer end of the inner wall of the mounting cavity 4, and a limiting part 3a protruding radially outward is provided at the outer end of the second annular gasket 3. During assembly, the limiting part 3a is welded to the limiting step 4c to limit the diaphragm assembly A axially, preventing axial displacement of the diaphragm assembly A and enhancing the overall sealing and connection reliability.

[0027] like Figure 2 As shown, the thickness of the first annular gasket 2 and the second annular gasket 3 both exceed the corrugation height of the diaphragm working area 1b. During the welding stage, the thicker gaskets can absorb and disperse a large amount of heat, significantly reducing the risk of the diaphragm 1 being damaged due to excessive heat input. After installation, the gaskets can provide physical protection for the diaphragm working area 1b, preventing external structural interference with corrugation deformation and ensuring the diaphragm's sensitive response and precise pressure conversion.

[0028] like Figure 2 and Figure 3 As shown, during installation, the first annular gasket 2, diaphragm 1, and second annular gasket 3 are first welded together to form diaphragm assembly A. Then, diaphragm assembly A is placed into mounting cavity 4. The first annular gasket 2 is embedded in the annular groove 4b and welded, and the limiting part 3a of the second annular gasket 3 is welded to the limiting step 4c. Simultaneously, the edge of diaphragm assembly A is welded to the side wall of mounting cavity 4 for sealing. This multi-part welding enhances the connection strength between diaphragm assembly A and mounting cavity 4, while also ensuring a sealed environment inside the pressure transmitter B, preventing media leakage from interfering with pressure measurement.

[0029] In addition, such as Figure 2 As shown, the outer end of the mounting cavity 4 is fixed by welding a cover plate 5. The inner end of the cover plate 5 is provided with an annular step 5a, and the right end of the second annular gasket 3 is welded and fixed to the annular step 5a. The cover plate 5 can further reinforce the diaphragm assembly A axially. Together with the limiting step 4c in the mounting cavity 4, it forms a bidirectional axial constraint, which makes the assembly stability and sealing reliability of the diaphragm assembly A better, and ensures the long-term stable operation of the pressure transmitter B.

[0030] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model. Those skilled in the art, under the guidance of the present utility model, can make various similar representations without departing from the spirit and claims of the present utility model, and such modifications all fall within the protection scope of the present utility model.

Claims

1. A diaphragm mounting structure, comprising a pressure transmitter (B), wherein the pressure transmitter (B) has a mounting cavity (4) inside, and a diaphragm (1) is fixedly disposed within the mounting cavity (4), characterized in that: The diaphragm (1) has a first annular gasket (2) and a second annular gasket (3) respectively on both sides. The first annular gasket (2), the diaphragm (1) and the second annular gasket (3) are stacked in sequence to form a diaphragm assembly (A). The diaphragm assembly (A) is fixed in the mounting cavity (4) by welding.

2. The diaphragm mounting structure according to claim 1, characterized in that: The outer edges of the first annular gasket (2), the diaphragm (1), and the second annular gasket (3) are aligned.

3. The diaphragm mounting structure according to claim 1, characterized in that: The diaphragm (1) includes a corrugated working area (1b) and an installation area (1a) extending outward from the working area (1b). The first annular gasket (2) and the second annular gasket (3) are fixed to both sides of the installation area (1a) by welding.

4. The diaphragm mounting structure according to claim 1, characterized in that: The mounting cavity (4) is provided with an annular support portion (4a) along its circumference. The annular support portion (4a) has an inwardly extending annular groove (4b) in its circumference. The shape of the annular groove (4b) is adapted to the first annular gasket (2). The edge of the diaphragm assembly (A) is fixedly welded to the side wall of the mounting cavity (4). The end of the first annular gasket (2) away from the diaphragm is welded and fixed in the annular groove (4b).

5. The diaphragm mounting structure according to claim 1, characterized in that: The inner wall of the mounting cavity (4) is provided with a limiting step (4c) at the outer end, and the outer end of the second annular gasket (3) is provided with a limiting part (3a) that protrudes outward in a radial direction. The limiting part (3a) is welded to the limiting step (4c).

6. The diaphragm mounting structure according to claim 3, characterized in that: The thickness of both the first annular gasket (2) and the second annular gasket (3) exceeds the corrugation height of the working area (1b).

7. The diaphragm mounting structure according to claim 1, characterized in that: The first annular gasket (2), the diaphragm (1), and the second annular gasket (3) are welded together to form the diaphragm assembly (A).

8. The diaphragm mounting structure according to claim 1, characterized in that: The outer end of the mounting cavity (4) is fixedly welded with a cover plate (5), and the inner end of the cover plate (5) is provided with an annular step (5a). The right end of the second annular gasket (3) is welded and fixed on the annular step (5a).

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