CN218845360U

CN218845360U - Pipeline joint structure of explosion-proof pressure gauge

Info

Publication number: CN218845360U
Application number: CN202223075730.7U
Authority: CN
Inventors: 姜莎莎
Original assignee: Qingdao Hakin Automation Instrument Co ltd
Current assignee: Qingdao Hakin Automation Instrument Co ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-04-11
Anticipated expiration: 2032-11-18

Abstract

The application discloses a pipeline joint structure of an explosion-proof pressure gauge, belongs to the field of pressure instruments, and solves the problem that the inside of the pressure instrument is easy to damage under larger pressure fluctuation or overhigh pressure in the prior art; the inner buffer block is spherical and slides along the inner cavity of the pipeline joint; a gap is formed between the inner buffer block and the inner wall of the inner cavity of the pipeline joint; the internal sealing gasket is fixedly constructed in the internal cavity of the pipeline joint; a second pressure channel penetrating through the inner sealing gasket is formed in the middle of the inner sealing gasket; an arc-shaped groove matched with the internal buffer block is formed on the surface of the internal sealing gasket; the end opening of the second pressure channel is positioned in the arc-shaped groove. The technical scheme of this application, when medium pressure shock in the pipeline, prevent that the manometer pressurized from leading to the fact the damage excessively.

Description

Pipeline joint structure of explosion-proof pressure gauge

Technical Field

The utility model relates to an explosion-proof manometer pipe joint structure belongs to the pressure instrument field.

Background

The pressure gauge is a meter which takes an elastic element as a sensitive element and measures and indicates the pressure higher than the ambient pressure, is very commonly applied and almost extends to all the fields of industrial processes and scientific researches. The method is widely available in the fields of heating power pipe networks, oil and gas transmission, water and gas supply systems, vehicle maintenance factories and stores and the like. Especially in the industrial process control and technical measurement process, the mechanical pressure gauge is more and more widely applied due to the characteristics of high mechanical strength, convenient production and the like of the elastic sensitive element of the mechanical pressure gauge.

When a pressure gauge for detecting fluid media such as steam, air pressure gas, water and the like is used in the manufacturing and processing industry, the type selection of the pressure gauge requires that the normal working display range of the pressure gauge must meet 2/3 scales. But when pressure in the pipeline has very big stirring, for example when equipment starts the initiation, the initial value of pressure in the equipment pipeline often can surpass manometer range, causes the shock of manometer inner structure. When equipment fails, the pressure in the pipeline of the equipment can be increased violently, so that the pressure in the pipeline exceeds the pressure-resistant range of the pressure gauge, the pressure gauge is damaged, and leakage is caused.

SUMMERY OF THE UTILITY MODEL

To the problem that exists among the prior art, the utility model provides an explosion-proof manometer pipe joint structure when medium pressure suddenly changes in the pipeline, prevents that the manometer pressurized from leading to the fact the damage excessively.

The utility model adopts the technical proposal that the pipeline joint structure of the explosion-proof pressure gauge comprises a pressure gauge and a pipeline joint; the pressure gauge comprises a gauge head shell and a pressure channel pipe, wherein the pressure channel pipe is positioned at the lower end of the gauge head shell and is communicated with the inside of the gauge head shell; the pipeline joint is provided with an inner cavity penetrating through the pipeline joint, one end of the pressure channel pipe, which is far away from the gauge head shell, is in threaded connection with an opening at one end of the inner cavity, one end of the pipeline joint, which is far away from the pressure channel pipe, is in threaded connection with a pipeline to be tested, and the inner cavity of the pipeline joint is communicated with the interior of the pipeline to be tested;

explosion-proof manometer pipe joint structure still includes:

an internal buffer block mounted within the internal cavity of the pipe joint; the inner buffer block is spherical and slides along the inner cavity of the pipeline joint; a gap is formed between the inner buffer block and the inner wall of the inner cavity of the pipeline joint;

an internal gasket fixedly constructed within the internal cavity of the pipe joint; a second pressure channel penetrating through the inner sealing gasket is formed in the middle of the inner sealing gasket; an arc-shaped groove matched with the internal buffer block is formed on the surface of the internal sealing gasket; the end opening of the second pressure channel is positioned in the arc-shaped groove.

Preferably, the pipe joint structure of the explosion-proof pressure gauge is characterized in that an annular protrusion is formed on the inner wall of the pipe joint, and the edge of the internal sealing gasket is extruded on the annular protrusion by the end part of the pressure channel pipe.

Preferably, the pipeline joint of the anti-explosion pressure gauge comprises an upper pipe body and a lower pipe body, and the upper pipe body and the lower pipe body are butted to form a communicated pipeline; the inner buffer block is arranged in the lower pipe body, and the inner sealing gasket is arranged in the upper pipe body; and an annular bearing ring for bearing the internal buffer block is constructed at the lower section of the side wall in the lower pipe body.

Preferably, the pipeline joint structure of the explosion-proof pressure gauge is characterized in that the internal sealing gasket is constructed with a plurality of second pressure channels, and all the second pressure channels are annularly arranged; after the internal buffer block is contacted with the arc-shaped groove, the internal buffer block blocks the end opening of the second pressure channel.

Optimized, above-mentioned explosion-proof pressure gauge pipe joint structure installs the spring between inside buffer block and the annular arch, and the both ends of spring contact with inside buffer block, annular arch respectively.

Preferably, the pipe joint structure of the explosion-proof pressure gauge has an annular spring groove formed on the surface of the internal buffer block, and one end of the spring is located in the spring groove.

Preferably, the pipe joint structure of the explosion-proof pressure gauge has a second annular spring groove formed on the surface of the annular protrusion, and one end of the spring is located in the second spring groove.

The beneficial effect of this application lies in:

in the technical scheme of this application, the pressure in the pipeline enters into gauge outfit casing through pipe joint, pressure channel pipe. When the medium passes through the pipeline joint, the internal buffer block is supported by medium pressure, and the medium enters the gauge outfit shell from a gap between the internal buffer block and the inner wall of the internal cavity of the pipeline joint and a pressure channel II on the internal sealing gasket. The internal buffer block moves to the balance point of the self gravity and the medium pressure and can stop. The measured medium passes through a gap between the internal buffer block and the inner wall of the internal cavity of the pipeline joint and the pressure channel II, so that the impact of medium pulsation on the instrument is effectively relieved, and the measuring range exceeding the pressure gauge is prevented. And when medium pressure was too big, medium pressure can continue upwards promoting inside buffer block for inside buffer block laminating arc wall and shutoff pressure channel two prevent that gas from continuing to get into gauge outfit casing, and then prevent that gauge outfit casing from bearing its pressure that surpasss its maximum withstand voltage, the damage of mechanical parts in greatly reduced impact force to the measuring apparatu table makes the display value of instrument steady more reliable and more, can prolong the life-span of instrument, reduces the potential safety hazard of equipment operation.

Drawings

FIG. 1 is a schematic structural diagram of the present application;

FIG. 2 is a schematic structural diagram of the internal buffer block in the present application when it is raised;

fig. 3 is a schematic structural diagram of another embodiment of the present application.

Detailed Description

The technical features of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.

As shown in the figures, the utility model relates to a pipeline joint structure of an explosion-proof pressure gauge, which comprises a pressure gauge and a pipeline joint; the pressure gauge comprises a gauge head shell 1 and a pressure channel pipe 2, wherein the pressure channel pipe 2 is positioned at the lower end of the gauge head shell 1 and is communicated with the inside of the gauge head shell 1; the pipeline joint is provided with an inner cavity penetrating through the pipeline joint, one end of the pressure channel pipe 2, far away from the gauge outfit shell 1, is in threaded connection with one end opening of the inner cavity, one end of the pipeline joint, far away from the pressure channel pipe 2, is in threaded connection with a pipeline to be tested, and the inner cavity of the pipeline joint is communicated with the interior of the pipeline to be tested.

In this embodiment, the pipe joint is configured by butting the upper pipe 501 and the lower pipe 505, the upper pipe 501 and the lower pipe 505 are both metal round pipes with the same inner diameter, and the upper pipe 501 and the lower pipe 505 are connected by threads and butted into a communicating pipe.

The inner buffer 3 is installed in the lower pipe 505, and the inner packing 4 is installed in the upper pipe 501. An annular supporting ring for supporting the internal buffer block 3 is formed at a lower portion of the inner sidewall of the lower pipe body 505, and the internal buffer block 3 falls on the supporting ring in a natural state.

The internal buffer block 3 is a hollow metal ball, and the internal buffer block 3 slides along the internal cavity of the pipeline joint under pressure. A gap is formed between the inner buffer block 3 and the inner wall of the inner cavity of the pipeline joint, and the gap can be set to be 0.8 mm, so that a medium can effectively pass through the gap. For the internal buffer block 3 of other shapes, set up it into the ball-type and can reduce the area of contact of internal buffer block and body of pipe lateral wall when sliding, and then reduce the friction, reduce the card of internal buffer block 3 and hinder.

The internal gasket 4 is a tetrafluoro gasket and is fixedly constructed in the internal cavity of the pipe joint. A second pressure channel 401 is formed in the middle of the inner seal 4 and penetrates through the inner seal 4, and the diameter of the second pressure channel 401 can be set to be 0.8 mm. The surface of the inner sealing gasket 4 is provided with an arc-shaped groove 402 matched with the inner buffer block 3, and the end opening of the second pressure channel 401 is positioned in the arc-shaped groove 402.

The internal sealing gasket 4 is constructed with a plurality of second pressure channels 401, and all the second pressure channels 401 are annularly arranged; after the inner cushion block 3 contacts the arc-shaped groove 402, the inner cushion block 3 blocks the end opening of the second pressure channel 401.

When inside buffer block 3 receives too big pressure to promote, inside buffer block 3 is promoted by pressure to the arc groove 402 contact with inside seal pad 4, and pressure is big more, and inside buffer block 3 is big more with the contact pressure of arc groove 402 to make when receiving very big pressure impact, can shutoff pressure channel two 401, thereby prevent that too big pressure from getting into gauge outfit casing 1. The weight, density, etc. of the internal buffer block 3 can be set according to the maximum pressure bearing of the pressure gauge.

An annular projection 502 is formed on the inner wall of the pipe joint, and the edge of the inner seal 4 is pressed against the annular projection 502 by the end of the pressure passage pipe 2. Through extrusion, make inside sealing gasket 4 fixed and the leakproofness is better, can only leave pressure channel two 401 as the medium passageway.

In another embodiment, a spring 6 may be additionally arranged between the inner buffer block 3 and the annular protrusion 502, and both ends of the spring 6 are respectively contacted with the inner buffer block 3 and the annular protrusion 502.

The inner damping block 3 is formed with an annular spring groove 301 on the surface, and one end of the spring 6 is located in the spring groove 301. The annular protrusion 502 is formed with an annular second spring groove 503 on the surface, and one end of the spring 6 is located in the spring groove 301.

Spring 6 both ends are fixed position by spring groove 301, two 503 spring grooves, but spring 6 sets up and can make inside buffer block 3 just can laminate arc wall shutoff pressure channel two 401 under very big pressure.

The technical scheme of this application mainly is applied to the pipeline of gaseous medium, to the pipeline of liquid medium, need do the pertinence improvement to different liquid media and just can be suitable for.

Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also understand that the changes, modifications, additions and substitutions made within the scope of the present invention should all belong to the protection scope of the present invention.

Claims

1. A pipeline joint structure of an explosion-proof pressure gauge comprises the pressure gauge and a pipeline joint; the pressure gauge comprises a gauge head shell (1) and a pressure channel pipe (2), wherein the pressure channel pipe (2) is positioned at the lower end of the gauge head shell (1) and is communicated with the inside of the gauge head shell (1); the pipeline joint is provided with an inner cavity penetrating through the pipeline joint, one end of the pressure channel pipe (2) far away from the gauge head shell (1) is in threaded connection with an opening at one end of the inner cavity, one end of the pipeline joint far away from the pressure channel pipe (2) is in threaded connection with a pipeline to be tested, and the inner cavity of the pipeline joint is communicated with the interior of the pipeline to be tested; the method is characterized in that: also comprises

An internal buffer block (3) mounted within the internal cavity of the pipe joint; the internal buffer block (3) is spherical and slides along the internal cavity of the pipeline joint; a gap is formed between the inner buffer block (3) and the inner wall of the inner cavity of the pipeline joint;

an internal gasket (4) fixedly constructed within the internal cavity of the pipe joint; a second pressure channel (401) penetrating through the inner sealing gasket (4) is constructed in the middle of the inner sealing gasket (4); an arc-shaped groove (402) matched with the internal buffer block (3) is formed on the surface of the internal sealing gasket (4); the end opening of the second pressure channel (401) is positioned in the arc-shaped groove (402).

2. The explosion-proof pressure gauge pipe joint structure of claim 1, wherein: an annular protrusion (502) is constructed on the inner wall of the pipeline joint, and the edge of the inner sealing gasket (4) is pressed on the annular protrusion (502) by the end part of the pressure channel pipe (2).

3. The explosion-proof pressure gauge pipe joint structure of claim 1, wherein: the pipeline joint comprises an upper pipe body (501) and a lower pipe body (505), and the upper pipe body (501) and the lower pipe body (505) are butted into a communicated pipeline; the internal buffer block (3) is arranged in the lower pipe body (505), and the internal sealing gasket (4) is arranged in the upper pipe body (501); an annular bearing ring for bearing the inner buffer block (3) is constructed on the lower section of the inner side wall of the lower pipe body (505).

4. The explosion-proof pressure gauge pipe joint structure of claim 1, wherein: the internal sealing gasket (4) is provided with a plurality of second pressure channels (401), and all the second pressure channels (401) are annularly arranged; after the inner buffer block (3) is in contact with the arc-shaped groove (402), the inner buffer block (3) blocks an end opening of the second pressure channel (401).

5. The explosion-proof pressure gauge piping joint structure of claim 2, wherein: install spring (6) between inside buffer block (3) and annular arch (502), the both ends of spring (6) contact with inside buffer block (3), annular arch (502) respectively.

6. The explosion-proof pressure gauge pipe joint structure of claim 5, wherein: an annular spring groove (301) is formed in the surface of the inner buffering block (3), and one end of the spring (6) is located in the spring groove (301).

7. The explosion-proof pressure gauge pipe joint structure of claim 5, wherein: an annular spring groove II (503) is formed in the surface of the annular protrusion (502), and one end of the spring (6) is located in the spring groove (301).