Explosion-proof pressure gauge

Abstract

The utility model discloses an explosion-proof pressure gauge, and relates to the technical field of pressure gauges. The pressure pipeline comprises a pressure pipeline body, the inner wall of the pressure pipeline body is in threaded connection with a connecting screw, the outer surface of the connecting screw is fixedly sleeved with a shell body, the inner wall of the shell body is fixedly connected with a dial plate body, and one end of the shell body is movably clamped with a protection plate. The outer surface of the shell body and the outer surface of the protection plate are jointly provided with a sealing assembly, the lower portion of one end of the pressure pipeline body is provided with a pressure relief assembly, and the pressure relief assembly comprises a mounting hole. Through the pressure relief assembly, when the pressure in the pressure gauge exceeds a set value, a pressure relief device can be automatically started to release the pressure, and the pressure gauge is prevented from exploding; according to the pressure gauge structure, through the sealing assembly, a multi-sealing structure is adopted, the sealing effect is improved, and flammable and explosive gas or liquid is prevented from entering the gauge.

Description

Technical Field

[0001] This utility model relates to the field of pressure gauge technology, specifically to an explosion-proof pressure gauge. Background Technology

[0002] A pressure gauge is an instrument that uses an elastic element as its sensing element to measure and indicate pressures higher than ambient pressure. They are ubiquitous in fields such as heating networks, oil and gas transmission, water and gas supply systems, and vehicle repair and maintenance shops. Especially in industrial process control and technical measurement, mechanical pressure gauges are increasingly widely used due to the high mechanical strength and ease of production of their elastic sensing element. However, when the internal pressure exceeds the gauge's capacity, it is prone to bursting.

[0003] First, the existing pressure gauge structure lacks a pressure relief component. When the pressure inside the gauge exceeds the set value, the pressure cannot be released automatically, which could lead to the pressure gauge exploding, posing a certain safety hazard. Second, the existing pressure gauge structure has insufficient sealing performance. In some harsh working environments, such as those with flammable and explosive gases or dust, the insufficient sealing performance of the pressure gauge may allow external hazardous substances to enter the gauge, causing an explosion hazard. Utility Model Content

[0004] To address the problems of existing pressure gauges failing to automatically release pressure when it exceeds a set value and pressure gauges exploding due to insufficient sealing, the purpose of this invention is to provide an explosion-proof pressure gauge.

[0005] To solve the above technical problems, this utility model adopts the following technical solution: an explosion-proof pressure gauge, including a pressure pipeline body, with a connecting screw threaded to the inner wall of the pressure pipeline body. The threaded connection between the pressure pipeline body and the connecting screw facilitates the installation and disassembly of the pressure gauge. A housing body is fixedly sleeved on the outer surface of the connecting screw. A dial body is fixedly connected to the inner wall of the housing body. A protective plate is movably engaged at one end of the housing body, further protecting the dial body. A sealing component is provided on both the outer surface of the housing body and the outer surface of the protective plate, improving the sealing performance between the housing body and the protective plate and preventing external impurities from entering. A pressure relief component is provided at the lower part of one end of the pressure pipeline body. This pressure relief assembly can promptly release pressure when it is too high, ensuring the safety of the pressure gauge and system, and improving the explosion-proof performance of the pressure gauge structure. The assembly includes a mounting hole located at one end of the pressure pipeline body. A pressure relief pipe is fixedly connected to the inner wall of the mounting hole, guiding the excessively high-pressure medium out. A positioning sleeve is fixedly connected to the inner wall of the pressure relief pipe, and a mounting bracket is fixedly connected to the lower inner wall of the pipe. A telescopic air rod is fixedly connected to the inner wall of the mounting bracket. A sealing plate, used in conjunction with the positioning sleeve, is fixedly connected to the output end of the telescopic air rod. The outer surface of the sealing plate is movably engaged with the inner wall of the positioning sleeve. The positioning sleeve provides positioning and sealing for the sealing plate. The telescopic air rod can control the movement of the sealing plate, achieving automatic pressure relief and preventing explosions caused by excessive pressure.

[0006] Preferably, the sealing assembly includes a sealing sleeve, which is movably snapped onto the outer surface of the protective plate and the outer shell body. The sealing sleeve can tightly connect the protective plate and the outer shell body together, improving the sealing performance. The movable snap-fit ​​method facilitates installation and disassembly. Two connecting plates are fixedly connected to the outer surface of the sealing sleeve, and the inner walls of the two connecting plates and the outer surfaces of the connecting screws are threaded with two positioning screws. The connecting plates and positioning screws can firmly fix the sealing sleeve to the outer shell body and the protective plate, preventing the sealing sleeve from loosening. A first sealing washer for use with the outer shell body is fixedly connected to one inner wall of the sealing sleeve. A support ring is fixedly connected to the inner wall of the outer shell body, and a second sealing washer for use with the first sealing washer is fixedly connected to one end of the support ring. The first and second sealing washers cooperate with each other to further improve the sealing performance between the outer shell body and the protective plate, preventing external impurities and gases from entering the pressure gauge and ensuring the normal operation and explosion-proof performance of the pressure gauge.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0008] 1. This application uses a pressure relief component, which automatically opens when the pressure inside the gauge exceeds the set value to release the pressure, prevent the pressure gauge from exploding, and improve the explosion-proof performance of the pressure gauge structure.

[0009] 2. This application uses a sealing component and a multi-layer sealing structure to improve the sealing effect and prevent flammable and explosive gases or liquids from entering the instrument. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram of the explosive structure of this utility model.

[0013] Figure 3 This is a schematic diagram of the cross-sectional structure of the pressure relief component of this utility model.

[0014] Figure 4 This is a schematic diagram of the explosive structure of the sealing component of this utility model.

[0015] In the diagram: 1. Pressure pipeline body; 2. Pressure relief assembly; 21. Sealing plug; 22. Positioning sleeve; 23. Telescopic air rod; 24. Mounting bracket; 25. Pressure relief pipe; 26. Mounting hole; 3. Sealing assembly; 31. Sealing sleeve; 32. Connecting plate; 33. Positioning screw; 34. First sealing gasket; 35. Second sealing gasket; 36. Support ring; 4. Protective plate; 5. Outer shell body; 6. Sealing ring; 7. Annular groove; 8. Connecting screw; 9. Dial body. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example: Figure 1-4As shown, this utility model provides an explosion-proof pressure gauge, including a pressure pipeline body 1. A connecting screw 8 is threaded onto the inner wall of the pressure pipeline body 1, and a housing body 5 is fixedly sleeved onto the outer surface of the connecting screw 8. A dial body 9 is fixedly connected to the inner wall of the housing body 5. A protective plate 4 is movably snapped onto one end of the housing body 5, and a sealing assembly 3 is provided on the outer surface of the housing body 5 and the outer surface of the protective plate 4. A pressure relief assembly 2 is provided at the lower part of one end of the pressure pipeline body 1. The pressure relief assembly 2 includes a mounting hole 26, which is located at one end of the pressure pipeline body 1. A pressure relief pipe 25 is fixedly connected to the inner wall of the mounting hole 26. A positioning sleeve 22 is fixedly connected to the inner wall of the pressure relief pipe 25. A mounting bracket 24 is fixedly connected to the lower inner wall of the pressure relief pipe 25, and a telescopic air rod 23 is fixedly connected to the inner wall of the mounting bracket 24. The output end of rod 23 is fixedly connected to a sealing plate 21 that works with positioning sleeve 22, and the outer surface of sealing plate 21 is movably engaged with the inner wall of positioning sleeve 22. The threaded connection between pressure pipe body 1 and connecting screw 8 facilitates the installation and removal of pressure gauge. The outer shell body 5 provides protection for dial body 9 to prevent it from being affected by the external environment. Protective plate 4 further protects dial body 9. The movable engagement method facilitates installation and replacement. Pressure relief component 2 can release pressure in time when the pressure is too high, ensuring the safety of pressure gauge and system. Mounting hole 26 provides an installation position for pressure relief pipe 25. Positioning sleeve 22 provides positioning and sealing for sealing plate 21. Mounting bracket 24 provides a stable installation position for telescopic air rod 23. Telescopic air rod 23 can control the movement of sealing plate 21 to achieve automatic pressure relief. When the pressure exceeds the set value, it effectively relieves pressure, avoiding pressure gauge explosion due to excessive pressure and improving the explosion-proof performance of pressure gauge.

[0018] The sealing assembly 3 includes a sealing sleeve 31, which is movably snapped onto the outer surfaces of the protective plate 4 and the outer shell body 5. Two connecting plates 32 are fixedly connected to the outer surface of the sealing sleeve 31, and two positioning screws 33 are threadedly connected to the inner walls of the two connecting plates 32 and the outer surfaces of the connecting screws 8. A first sealing washer 34 for use with the outer shell body 5 is fixedly connected to one inner wall of the sealing sleeve 31, and a support ring 36 is fixedly connected to the inner wall of the outer shell body 5. A second sealing washer 35 for use with the first sealing washer 34 is fixedly connected to one end of the support ring 36. The sealing sleeve 31 tightly connects the protective plate 4 and the outer shell body 5, improving the sealing performance. The connecting plates 32 and the positioning screws 33 firmly fix the sealing sleeve 31 to the outer shell body 5 and the protective plate 4 to prevent loosening. The first sealing washer 34 and the second sealing washer 35 cooperate with each other to further improve the sealing performance between the outer shell body 5 and the protective plate 4, preventing external impurities and gas from entering the pressure gauge and ensuring the normal operation and explosion-proof performance of the pressure gauge.

[0019] The protective plate 4 is transparent, which can protect the dial body 9 without affecting the observation of the dial.

[0020] Both the connecting screw 8 and the pressure pipe body 1 are hollow, and the connecting screw 8 and the pressure pipe body 1 are concentrically arranged. The hollow design of the connecting screw 8 and the pressure pipe body 1 facilitates the flow of the medium.

[0021] The pressure pipeline body 1 has an annular groove 7 at its top end, and a sealing ring 6 for use with the connecting screw 8 is fixedly connected to the inner wall of the annular groove 7. The sealing ring 6 in the annular groove 7 further enhances the sealing between the connecting screw 8 and the pressure pipeline body 1, preventing media leakage.

[0022] The inner wall shape of the positioning sleeve 22 is the same as the outer surface shape of the sealing plate 21, and the positioning sleeve 22 and the sealing plate 21 are concentrically arranged. The positioning sleeve 22 and the sealing plate 21 have the same shape and are concentrically arranged to ensure tightness during sealing and improve the reliability of the pressure relief assembly 2.

[0023] One end of the opposite face of the two connecting plates 32 is slidably attached to the outer surface of the connecting screw 8. The slidable attachment of the connecting plates 32 to the outer surface of the connecting screw 8 makes the installation of the sealing sleeve 31 more stable and improves the sealing effect.

[0024] The first sealing gasket 34 and the second sealing gasket 35 are the same size. The outer surface of the first sealing gasket 34 slides and fits against the inner wall of the outer shell body 5, and the outer surface of the second sealing gasket 35 is fixedly connected to the inner wall of the outer shell body 5. The first sealing gasket 34 and the second sealing gasket 35 are the same size and are used together to improve the sealing performance. The first sealing gasket 34 slides and fits against the inner wall of the outer shell body 5, which is convenient for installation and position adjustment. The second sealing gasket 35 is fixedly connected to the inner wall of the outer shell body 5, which provides stable sealing support.

[0025] Working principle: First, the outer shell body 5 is securely connected to the pressure pipe body 1 by connecting the inner wall thread and the connecting screw 8.

[0026] Meanwhile, the hollow design of the connecting screw 8 and the pressure pipe body 1 allows the medium to flow smoothly, and the sealing ring 6 further enhances the sealing of the connection and prevents medium leakage.

[0027] The inner wall of the outer casing 5 is fixedly connected to the dial body 9, providing protection for the dial. The protective plate 4 can protect the dial body 9 from damage such as collisions and scratches from external objects, without affecting the observation of the dial body 9.

[0028] The sealing sleeve 31 in the sealing assembly 3 is movably snapped onto the outer surface of the protective plate 4 and the outer shell body 5, and is fixed to the outer shell body 5 and the protective plate 4 by two connecting plates 32 and positioning screws 33.

[0029] The second sealing gasket 35, which is fixedly connected to one end of the support ring 36, is the same size as the first sealing gasket 34 and is used in conjunction with it. This further improves the sealing between the outer shell 5 and the protective plate 4, prevents external impurities and gas from entering the pressure gauge, and ensures the normal operation and explosion-proof performance of the pressure gauge.

[0030] When the pressure inside the pressure pipeline body 1 rises abnormally, the pressure relief component 2 starts to work.

[0031] Under normal circumstances, the outer surface of the sealing plate 21 is engaged with the inner wall of the positioning sleeve 22 to provide a seal and prevent media leakage.

[0032] When the pressure exceeds the set value, the telescopic air rod 23 is activated, pushing the sealing plate 21 away from the positioning sleeve 22, opening the pressure relief channel, so that the excessive pressure in the pressure pipeline body 1 flows to the pressure relief pipe 25, effectively relieving the pressure gauge structure.

[0033] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An explosion-proof pressure gauge, comprising a pressure pipeline body (1), characterized in that: The inner wall of the pressure pipe body (1) is threaded with a connecting screw (8), and the outer surface of the connecting screw (8) is fixedly sleeved with a shell body (5). The inner wall of the shell body (5) is fixedly connected with a dial body (9). One end of the shell body (5) is movably snapped with a protective plate (4), and the outer surface of the shell body (5) and the outer surface of the protective plate (4) are jointly provided with a sealing component (3). A pressure relief component (2) is provided at the lower part of one end of the pressure pipe body (1). The pressure relief assembly (2) includes a mounting hole (26), which is located at one end of the pressure pipeline body (1). A pressure relief pipe (25) is fixedly connected to the inner wall of the mounting hole (26). A positioning sleeve (22) is fixedly connected to the inner wall of the pressure relief pipe (25). A mounting bracket (24) is fixedly connected to the lower inner wall of the pressure relief pipe (25). A telescopic air rod (23) is fixedly connected to the inner wall of the mounting bracket (24). A sealing plug (21) is fixedly connected to the output end of the telescopic air rod (23) to cooperate with the positioning sleeve (22). The outer surface of the sealing plug (21) is movably engaged with the inner wall of the positioning sleeve (22).

2. The explosion-proof pressure gauge as described in claim 1, characterized in that: The sealing assembly (3) includes a sealing sleeve (31), which is movably snapped onto the outer surface of the protective plate (4) and the outer shell body (5). Two connecting plates (32) are fixedly connected to the outer surface of the sealing sleeve (31), and the inner walls of the two connecting plates (32) and the outer surface of the connecting screws (8) are threadedly connected to two positioning screws (33). A first sealing washer (34) for use with the outer shell body (5) is fixedly connected to one side of the inner wall of the sealing sleeve (31). A support ring (36) is fixedly connected to the inner wall of the outer shell body (5), and a second sealing washer (35) for use with the first sealing washer (34) is fixedly connected to one end of the support ring (36).

3. The explosion-proof pressure gauge as described in claim 1, characterized in that: The protective plate (4) is transparent.

4. The explosion-proof pressure gauge as described in claim 1, characterized in that: Both the connecting screw (8) and the pressure pipe body (1) are hollow, and the connecting screw (8) and the pressure pipe body (1) are concentrically arranged.

5. The explosion-proof pressure gauge as described in claim 1, characterized in that: The pressure pipeline body (1) has an annular groove (7) at its top end, and a sealing ring (6) for use with a connecting screw (8) is fixedly connected to the inner wall of the annular groove (7).

6. The explosion-proof pressure gauge as described in claim 1, characterized in that: The inner wall shape of the positioning sleeve (22) is the same as the outer surface shape of the sealing plate (21), and the positioning sleeve (22) and the sealing plate (21) are concentrically arranged.

7. The explosion-proof pressure gauge as described in claim 2, characterized in that: One end of the opposite face of the two connecting plates (32) slides into contact with the outer surface of the connecting screw (8).

8. The explosion-proof pressure gauge as described in claim 2, characterized in that: The first sealing gasket (34) and the second sealing gasket (35) are the same size, and the outer surface of the first sealing gasket (34) slides and fits against the inner wall of the outer shell body (5), while the outer surface of the second sealing gasket (35) is fixedly connected to the inner wall of the outer shell body (5).

Images