CN219391215U

CN219391215U - Barometer with sealable explosion-proof device

Info

Publication number: CN219391215U
Application number: CN202223521313.0U
Authority: CN
Inventors: 涂睿聪; 贺磊; 余景源
Original assignee: Wuhan Aviation Instrument Co Ltd
Current assignee: Wuhan Aviation Instrument Co Ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-07-21
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses a barometer with a sealable explosion-proof device. The air pressure meter comprises an air pressure meter main body and an anti-explosion device, wherein the anti-explosion device is arranged in an installation groove (12) reserved in an air pressure meter inner cylinder (10) and is sealed through a flat gasket and a sealing ring; the explosion-proof device consists of an explosion-proof sleeve (3), an explosion plug (4), a limiting block (1), a gasket (5) and a spring (2); the explosion plug (4) and the gasket (5) are pressed on the inner wall of the top end of the explosion-proof sleeve (3) by the pre-tightening force provided by the spring (2), and the limiting block (1) is connected to the bottom end of the explosion-proof sleeve (3) to limit the spring (2). The utility model does not affect the whole sealing performance of the barometer under the normal use environment of the barometer, and can prevent various liquids such as water, oil and the like from entering the barometer; when the barometer leaks air, the pressure can be released in time to discharge leakage air.

Description

Barometer with sealable explosion-proof device

Technical Field

The utility model belongs to the technical field of pressure instruments and meters, and particularly relates to a barometer with a sealable explosion-proof device.

Background

In various barometers using gas as a working medium, explosion-proof holes are generally designed. Because explosion-proof hole is unsealed, when the barometer works in various liquids such as water, hydraulic oil, various liquids can be immersed into the barometer from explosion-proof hole and cause corrosion or fuzzy dial plate to the interior parts of the meter, influence the performance of the pressure sensing device in the barometer or influence the pressure indication interpretation of the barometer, and lead to the unable normal work of barometer.

However, if the barometer is not provided with an explosion-proof hole, the leaked gas in the barometer cannot be timely discharged when the barometer leaks gas, so that the excessive gas pressure in the barometer finally causes explosion of parts such as glass, a shell and the like, and the safety of operators is endangered.

Therefore, the prior art remains the sealing performance of the barometer and the explosion-proof function of the barometer, which is an irreconcilable problem.

Disclosure of Invention

The purpose of the utility model is that: a barometer with a sealable explosion proof device is provided. The utility model does not affect the whole sealing performance of the barometer under the normal use environment of the barometer, and can prevent various liquids such as water, oil and the like from entering the barometer; when the barometer leaks air, the pressure can be released in time to discharge leakage air.

The technical scheme of the utility model is as follows: the barometer with the sealable explosion-proof device comprises a barometer main body and the explosion-proof device, wherein the explosion-proof device is arranged in an installation groove reserved in an inner cylinder of the barometer and is sealed by a flat gasket and a sealing ring; the explosion-proof device consists of an explosion-proof sleeve, an explosion top, a limiting block, a gasket and a spring; the explosion plug and the gasket are pressed on the inner wall of the top end of the explosion-proof sleeve by the pretightening force provided by the spring, and the limiting block is connected to the bottom end of the explosion-proof sleeve to limit the spring.

In the barometer with the sealable explosion-proof device, when the explosion-proof device is installed in the installation groove, the explosion-proof device is sealed through the flat gasket and the sealing ring.

In the barometer with the sealable explosion-proof device, the gasket and the sealing ring are made of silicon rubber.

In the barometer with the sealable explosion-proof device, the gasket and the sealing ring are made of fluorine silica gel.

In the barometer with the sealable explosion-proof device, the mounting groove is connected with the explosion-proof sleeve through threads.

In the barometer with the sealable explosion-proof device, the explosion-proof sleeve is in threaded connection with the limiting block.

The utility model has the advantages that: the explosion-proof sleeve is sealed by pressing the explosion plug and the gasket to the inner wall of the top end of the explosion-proof sleeve through the same spring, and the position of the spring is limited through the limiting block. The parts are assembled into an explosion-proof device and are arranged in the mounting groove of the pressure gauge main body, so that the sealing and explosion-proof pressure relief functions of the whole gauge are provided. The structure does not affect the overall sealing performance of the barometer under the normal use environment of the barometer, and can prevent various liquids such as water, oil and the like from entering the barometer; when the barometer leaks air, the pressure can be released in time to discharge the leaked air, so that the barometer is protected from safety accidents of the glass shell and other parts, such as the explosion injury of people. The barometer can still have the explosion-proof pressure relief function on the premise of meeting the requirements of water resistance and oil, expands the use environment of the barometer, reduces the safety risk of the barometer, and has great practical application value.

Drawings

FIG. 1 is a block diagram of a barometer with a sealable explosion proof device;

FIG. 2 is a block diagram of an explosion-proof device;

FIG. 3 is a schematic view of an installation of an explosion proof device;

fig. 4 is a schematic diagram of a pressure relief of an explosion proof device.

Detailed Description

The utility model is further illustrated by the following figures and examples, which are not intended to be limiting.

Example 1. The barometer with sealable explosion-proof device, the constitution is as shown in figures 1-4, comprising a barometer main body and an explosion-proof device, wherein the explosion-proof device is arranged in an installation groove 12 reserved in an inner cylinder 10 of the barometer and is sealed by a flat gasket and a sealing ring; the explosion-proof device consists of an explosion-proof sleeve 3, an explosion plug 4, a limiting block 1, a gasket 5 and a spring 2; the explosion plug 4 and the gasket 5 are pressed on the inner wall of the top end of the explosion-proof sleeve 3 by the pretightening force provided by the spring 2, and the limiting block 1 is connected to the bottom end of the explosion-proof sleeve 3 to limit the spring 2.

When the explosion-proof device is mounted in the mounting groove 12, the explosion-proof device is sealed by the flat gasket 16 and the sealing ring 6.

The gasket 5 and the seal 6 are made of silicone rubber.

The gasket 5 and the seal 6 are made of fluorine silica gel.

The mounting groove 12 is connected with the explosion-proof sleeve 3 through threads.

The explosion-proof sleeve 3 is in threaded connection with the limiting block 1.

Referring to fig. 1, the barometer of the present utility model comprises a housing 7, an inner cylinder 10, a joint 15, a bourdon tube 11, a choke plug 14, a movement 13, a pointer 9, a dial 8, and other components. The gas enters the Bowden tube 11 through the joint 15, the free end of the Bowden tube 11 drives the bulkhead 14 welded thereto to move, the movement 13 is engaged to rotate the pointer 9 and the pressure value is indicated on the dial 8.

Referring to fig. 2, the explosion-proof device is composed of an explosion-proof sleeve 3, an explosion plug 4, a limiting block 1, a gasket 5 and a spring 2, wherein the gasket 5 and the spring 2 are sleeved at two ends of the explosion plug 4, are put into the explosion-proof sleeve 3, the limiting block 1 is screwed into the explosion-proof sleeve 3 from the surface 3B of the explosion-proof sleeve and compresses the spring 2, and the explosion plug 4 and the gasket 5 are pressed on the inner end face of the surface A of the explosion-proof sleeve 3.

Referring to fig. 3, an installation groove is reserved on the inner cylinder 10 of the barometer, the explosion-proof sleeve 3 is screwed into the installation groove reserved on the inner cylinder 10 of the barometer by a screwdriver through a straight groove at the end of the explosion-proof sleeve 3A, and a flat gasket and a sealing ring are sequentially arranged at the end of the explosion-proof sleeve 3B. The purpose of the sealing ring is water and oil proofing, and the purpose of the flat gasket 5 is to prevent the sealing ring from being scratched when the explosion-proof sleeve 3 is screwed in a rotating way.

Referring to fig. 4, when the bourdon tube 11 of the barometer breaks, or when a crack occurs at the welding position of the bourdon tube 11, the joint 15 and the bulkhead 14, gas enters the barometer from the broken position, so that the pressure inside the barometer rises, and at the same time, the inner wall of the barometer is uniformly stressed, and the explosion-proof combination a surface, the gasket 5 pre-tensioned by the spring 2 and the explosion plug 4 are also subjected to gas pressure. When the pressure of the gas applied to the blasting plug 4 exceeds the pre-tightening force of the spring 2 in the explosion-proof combination, the blasting plug 4 is pushed loose, and the gas is discharged along the gap between the blasting plug 4 and the explosion-proof sleeve 3 and the central hole of the limiting block 1.

Claims

1. The utility model provides a take barometer of sealable explosion-proof equipment which characterized in that: the air pressure meter comprises an air pressure meter main body and an anti-explosion device, wherein the anti-explosion device is arranged in an installation groove (12) reserved in an air pressure meter inner cylinder (10) and is sealed through a flat gasket and a sealing ring; the explosion-proof device consists of an explosion-proof sleeve (3), an explosion plug (4), a limiting block (1), a gasket (5) and a spring (2); the explosion plug (4) and the gasket (5) are pressed on the inner wall of the top end of the explosion-proof sleeve (3) by the pre-tightening force provided by the spring (2), and the limiting block (1) is connected to the bottom end of the explosion-proof sleeve (3) to limit the spring (2).

2. The barometer with sealable explosion proof device of claim 1, wherein: when the explosion-proof device is installed in the installation groove (12), the explosion-proof device is sealed by the flat gasket (16) and the sealing ring (6).

3. The barometer with sealable explosion proof device of claim 2, wherein: the gasket (5) and the sealing ring (6) are made of silicon rubber.

4. The barometer with sealable explosion proof device of claim 2, wherein: the gasket (5) and the sealing ring (6) are made of fluorine silica gel.

5. The barometer with sealable explosion proof device of claim 1, wherein: the mounting groove (12) is connected with the explosion-proof sleeve (3) through threads.

6. The barometer with sealable explosion proof device of claim 1, wherein: the explosion-proof sleeve (3) is in threaded connection with the limiting block (1).