Protective gasket for pressure instrument and application structure of protective gasket

Abstract

The utility model discloses a protective gasket for a pressure instrument and an application structure of the protective gasket, the protective gasket for the pressure instrument comprises a protective gasket body, the protective gasket body is composed of a sealing ring and a protective diaphragm, the protective diaphragm is arranged on the inner wall of the sealing ring, and connecting cavities which are not communicated with each other are formed on the two sides of the protective diaphragm. The outer wall of one end of the protective gasket body is provided with at least one exhaust notch communicated with the connecting cavity at the same end; an application structure of a protective gasket for a pressure instrument comprises the pressure instrument, the protective gasket, a connecting pipe fitting and a hoop, the protective gasket is clamped between the pressure instrument and the end face of a connector of the connecting pipe fitting, the pressure instrument and the connecting pipe fitting are fixed through the hoop, and the protective gasket is applied to the pressure instrument. The pressure instrument is installed at the end, provided with the exhaust notch, of the protection gasket. According to the utility model, the sensitive diaphragm of the pressure instrument is protected through the protective gasket, the direct contact between the sensitive diaphragm and corrosive materials is avoided, and the cost is low and the replacement is convenient.

Description

Technical Field

[0001] The utility model relates to a protective gasket for a pressure instrument and an application structure thereof, belonging to the technical field of pressure instrument accessories. Background Art

[0002] Existing diaphragm pressure instruments, such as Figure 1 As shown, a sensitive diaphragm is used as a sensitive element for testing pressure. The sensitive diaphragm is generally made of metal and integrated on the pressure instrument. The sensitive diaphragm may come into contact with the feed liquid during use. Under certain highly corrosive working conditions, insufficient corrosion resistance of the sensitive diaphragm may cause damage to the sensitive diaphragm. When the sensitive diaphragm is damaged, it means that the entire pressure instrument is damaged, and the entire replacement cost is high. Therefore, there is an urgent need for a protective profile that can protect the sensitive diaphragm, avoid direct contact between the sensitive diaphragm and the feed liquid as much as possible, and is easy to replace with low cost. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the sensitive diaphragm in the existing pressure instrument is easy to contact the feed liquid, and is very easy to be corroded under highly corrosive working conditions, causing the entire pressure instrument to fail and be damaged, and the cost is high.

[0004] In order to solve the above technical problems, the utility model provides a protective gasket for a pressure instrument and an application structure thereof, which can protect a sensitive diaphragm and is low-cost and easy to replace.

[0005] In order to achieve the above technical objectives and the above technical effects, this application is implemented through the following technical solutions:

[0006] A protective gasket for a pressure instrument comprises a protective gasket body, both ends of which are formed with connecting cavities, the two connecting cavities are not connected to each other, and at least one exhaust notch connected to the connecting cavity at the same end is formed on the outer wall of one end of the protective gasket body.

[0007] Preferably, the protective gasket body comprises a sealing ring and a protective diaphragm, the protective diaphragm is arranged on the inner wall of the sealing ring and forms the connecting cavities which are not connected to each other on both sides of the protective diaphragm.

[0008] Furthermore, the thickness of the protective film is less than or equal to the thickness of the sealing ring.

[0009] Furthermore, the thickness of the sealing ring is less than or equal to 0.3 mm.

[0010] Preferably, the exhaust notch is arranged obliquely, and the opening of the exhaust notch on the outer wall of the protective gasket body is arranged close to the connecting cavity at the other end of the protective gasket body.

[0011] An application structure of a protective gasket for a pressure instrument, comprising a pressure instrument, a protective gasket, a connecting pipe fitting and a clamp, wherein the protective gasket is clamped between the pressure instrument and the interface end faces of the connecting pipe fitting, and the pressure instrument and the connecting pipe fitting are fixed by the clamp, and is characterized in that the protective gasket is applied as a protective gasket for a pressure instrument, and the pressure instrument is installed at one end of the protective gasket where the exhaust notch is opened.

[0012] The utility model provides a protective gasket for a pressure instrument and an application structure thereof, which has the following advantages:

[0013] 1. When the utility model is used, the pressure instrument is installed at the end of the protective gasket body with the exhaust notch, and the end without the exhaust notch contacts the material. Since the protective diaphragm is provided in the protective gasket body, the material and the sensitive diaphragm of the pressure instrument can be isolated, thereby avoiding corrosion of the sensitive diaphragm.

[0014] 2. When the utility model is used, one end of the protective gasket body with the exhaust notch is connected to the pressure instrument, and the air remaining between the protective diaphragm and the sensitive diaphragm on the protective gasket body can be discharged through the exhaust notch, so that the protective diaphragm and the sensitive diaphragm are more closely fitted.

[0015] 3. When the utility model is used, the overall thickness of the protective gasket is small and the cost is low, and the pressure instrument and the connecting pipe are connected by a clamp for easy replacement, thereby increasing the overall service life of the pressure instrument while minimizing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of a pressure instrument in the prior art;

[0017] Figure 2 This is a structural schematic diagram of a protective gasket for a pressure instrument of the utility model;

[0018] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0019] Figure 4 A schematic diagram of a structure in which a protective gasket for a pressure instrument of the utility model is clamped between a pressure instrument and a connecting pipe fitting and fixed by a clamp;

[0020] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure at BB in the middle;

[0021] In the figure:

[0022] 1-protective gasket; 11-protective gasket body; 111-sealing ring; 112-protective diaphragm; 2-connecting cavity; 3-exhaust notch; 4-pressure instrument; 41-sensitive diaphragm; 5-connecting pipe fitting; 6-clamp; 7-embedded groove; 8-sealing protrusion. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technical personnel in the field without creative work are within the scope of protection of the present utility model.

[0024] Reference Figure 2 and Figure 3 The utility model provides a protective gasket for a pressure instrument, including a protective gasket body 11, connecting cavities 2 are formed at both ends of the protective gasket body 11, and the two connecting cavities 2 are not connected to each other. At least one exhaust notch 3 connected to the connecting cavity 2 at the same end is opened on the outer wall of one end of the protective gasket body 11, and the exhaust notch 3 is inclined, and the opening of the exhaust notch 3 on the outer wall of the protective gasket body 11 is arranged close to the connecting cavity 2 at the other end of the protective gasket body 11. When in use, the end of the protective gasket body 11 connected to the exhaust notch 3 is connected to the pressure instrument 4, and the inclined exhaust notch 3 can be used to discharge the air remaining between the sensitive diaphragm 41 of the pressure instrument 4 and the inner wall of the connecting cavity 2, and at the same time, it can ensure that the exhaust notch 3 is not blocked as much as possible to achieve smooth exhaust.

[0025] In a further embodiment, the protective gasket body 11 includes a sealing ring 111 and a protective diaphragm 112. The sealing ring 111 is O-shaped. The protective diaphragm 112 is integrally injection molded on the inner wall of the sealing ring 111 and forms a connecting cavity 2 that is not connected to each other on both sides of the protective diaphragm 112. The thickness of the protective diaphragm 112 is less than or equal to the thickness of the sealing ring 111. When the thickness of the protective diaphragm 112 is equal to the thickness of the sealing ring 111, the thickness of the connecting cavity 2 is 0 mm, the thickness of the sealing ring 111 is less than or equal to 0.3 mm, and the surface of the side wall of the protective diaphragm 112 used to connect the material is flat.

[0026] Reference Figure 4 and Figure 5The application structure of the protective gasket for pressure instrument of the utility model is composed of a pressure instrument 4, a protective gasket 1, a connecting pipe 5 and a clamp 6. The protective gasket 1 is clamped between the interface end faces of the pressure instrument 4 and the connecting pipe 5, and the pressure instrument 4 is installed on one end of the protective gasket 1 with a venting notch 3. The interface of the pressure instrument 4 and the interface end faces of the connecting pipe 5 are both provided with an embedding groove 7 that matches the protective gasket 1 to ensure the sealing of the connection. The pressure instrument 4 and the connecting pipe 5 are fixed by the clamp 6 for easy disassembly and replacement.

[0027] In a further embodiment, a sealing protrusion 8 which is plugged and matched with the connecting cavity 2 is integrally formed on the inner wall of the embedding groove 7 on the end surface of the pressure instrument 4 interface and the connecting pipe 5 interface to further improve the sealing of the connection.

[0028] The above is only a preferred embodiment of the utility model, and is not any formal or substantial limitation of the utility model. It should be pointed out that ordinary technicians in this technical field can make some improvements and supplements without departing from the utility model, and these improvements and supplements should also be regarded as the protection scope of the utility model. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the utility model, which are all equivalent embodiments of the utility model; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. A protective gasket for a pressure instrument, characterized in that: The protective gasket body (11) comprises a connecting cavity (2) formed at both ends of the protective gasket body (11), the two connecting cavities (2) are not connected to each other, and at least one exhaust notch (3) connected to the connecting cavity (2) at the same end is formed on the outer wall of one end of the protective gasket body (11).

2. A protective gasket for a pressure instrument as claimed in claim 1, characterized in that: The protective gasket body (11) comprises a sealing ring (111) and a protective diaphragm (112); the protective diaphragm (112) is arranged on the inner wall of the sealing ring (111) and forms the connecting cavities (2) which are not connected to each other on both sides of the protective diaphragm (112).

3. A protective gasket for a pressure instrument as claimed in claim 2, characterized in that: The thickness of the protective film (112) is less than or equal to the thickness of the sealing ring (111).

4. A protective gasket for a pressure instrument as claimed in claim 3, characterized in that: The sealing ring (111) has a thickness less than or equal to 0.3 mm.

5. A protective gasket for a pressure instrument as claimed in claim 1, characterized in that: The exhaust notch (3) is arranged at an angle, and the opening of the exhaust notch (3) on the outer wall of the protective gasket body (11) is arranged close to the connecting cavity (2) at the other end of the protective gasket body (11).

6. An application structure of a protective gasket for a pressure instrument, comprising a pressure instrument (4), a protective gasket (1), a connecting pipe (5) and a clamp (6), wherein the protective gasket (1) is clamped between the interface end faces of the pressure instrument (4) and the connecting pipe (5), and the pressure instrument (4) and the connecting pipe (5) are fixed by the clamp (6), characterized in that: The protective gasket (1) is a protective gasket for a pressure instrument as claimed in any one of claims 1 to 5, and the pressure instrument (4) is installed at one end of the protective gasket (1) where the exhaust notch (3) is opened.

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