CN221099942U - Metal corrugated diaphragm pressure gauge - Google Patents
Metal corrugated diaphragm pressure gauge Download PDFInfo
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- CN221099942U CN221099942U CN202322596914.6U CN202322596914U CN221099942U CN 221099942 U CN221099942 U CN 221099942U CN 202322596914 U CN202322596914 U CN 202322596914U CN 221099942 U CN221099942 U CN 221099942U
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- diaphragm
- sleeve
- metal corrugated
- limiting block
- pressure gauge
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- 239000002184 metal Substances 0.000 title claims abstract description 62
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 239000012528 membrane Substances 0.000 claims abstract description 25
- 238000003466 welding Methods 0.000 claims abstract description 13
- 238000006073 displacement reaction Methods 0.000 claims abstract description 11
- 238000010894 electron beam technology Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 4
- 210000002445 nipple Anatomy 0.000 claims 1
- 230000032683 aging Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model discloses a metal corrugated diaphragm pressure gauge, which comprises: the device comprises a joint mouth, a metal corrugated membrane, a mandril, a membrane limiting block and a sleeve, wherein the joint mouth is integrally funnel-shaped, an air inlet is arranged below the inner part of the joint mouth, and a step hole is arranged above the inner part of the joint mouth; the lower end surface of the sleeve is welded with the metal corrugated diaphragm in a sealing way through vacuum electron beam welding, and the welded sleeve is arranged on a step of a step hole above the inside of the joint; the outer side of the upper end surface of the sleeve is welded with the inner wall of the nozzle in a sealing way through vacuum electron beam welding; the inner wall of the sleeve is provided with an internal thread; the diaphragm limiting block is in a shape of a round cake, a through hole is formed in the middle of the diaphragm limiting block, an external thread is formed in the outer side wall of the diaphragm limiting block, and the diaphragm limiting block is in threaded connection with the sleeve; the lower end surface of the sleeve is used for limiting the displacement of the metal corrugated membrane; because the vacuum electron beam welding is adopted to replace the sealing ring for sealing and the threaded fastener, the phenomenon of air leakage of the pressure gauge caused by ageing of the sealing ring and loosening of the fastener is effectively avoided, the limiting block limits the displacement of the metal corrugated diaphragm, and plastic deformation of the diaphragm is avoided.
Description
Technical Field
The utility model belongs to the technical field of pressure measurement, and relates to a metal corrugated diaphragm pressure gauge.
Background
A metal diaphragm manometer is an important industrial instrument for measuring minute pressure measurements of media having gases, liquids, and vapors. Is widely applied to various technical fields of aviation, aerospace, petroleum, chemical industry, food and the like.
As shown in fig. 2, the conventional metal corrugated diaphragm pressure gauge comprises an instrument transmission mechanism, a connector 6, a connecting screw 7, an upper sealing ring 8, a pressing block 9, a metal corrugated diaphragm 10, a push rod 11 and a lower sealing ring 12, wherein a diaphragm displacement space is formed between the pressing block 9 and the metal corrugated diaphragm 10, the metal corrugated diaphragm 10 is installed in the connector 6, the periphery of the metal corrugated diaphragm is respectively in sealing contact with the upper sealing ring 8 and the lower sealing ring 12, and the metal corrugated diaphragm 10 and the connector 6 form a cavity for accommodating pressure medium. The ejector rod 11 is connected to the metal corrugated diaphragm 10, and the upper part is connected with a pressure gauge transmission mechanism. The upper sealing ring 8 is arranged on the step of the joint mouth 6, and the surface of the upper sealing ring is in sealing connection with the metal corrugated membrane. The pressing block 9 and the connector 6 are fixedly connected through a connecting screw.
In actual work, the pressure medium P is suddenly increased or exceeds the allowable working pressure, so that the metal corrugated diaphragm is deformed, broken and the like, and the pressure gauge indicating mechanism cannot return to a position, so that the pressure indication is invalid. Because the metal corrugated membrane and the joint mouth are sealed by adopting the sealing ring, the elasticity of the sealing ring is reduced after long-term use, and the pressure leakage phenomenon can occur due to connection looseness caused by working vibration.
Therefore, how to prevent deformation, rupture and pressure leakage at the sealing part of the metal corrugated membrane during use is a technical problem which needs to be solved urgently by those skilled in the art.
Disclosure of utility model
The purpose of the utility model is that: the utility model aims to solve the problems that when the pressure gauge suddenly increases or exceeds the working allowable pressure in the moment of working, the diaphragm corrugation is subjected to plastic deformation, rupture and other faults to cause the pressure gauge to fail, the elasticity of the sealing ring is reduced, and the connection looseness caused by vibration in working can cause the pressure leakage. The metal corrugated diaphragm pressure gauge can effectively solve the problems, improve the quality stability of products and prolong the service life of the products.
The technical scheme of the utility model is as follows:
A metal bellows diaphragm pressure gauge, comprising: the device comprises a joint nozzle 1, a metal corrugated membrane 2, an ejector rod 3, a membrane limiting block 4 and a sleeve 5;
the whole of the joint mouth is funnel-shaped, an air inlet is arranged below the inner part of the joint mouth, and a step hole is arranged above the inner part of the joint mouth;
The sleeve is cylindrical, the lower end surface of the sleeve is welded with the metal corrugated diaphragm in a sealing way through vacuum electron beam welding, and the welded sleeve is arranged on a step of a step hole above the inside of the joint;
the outer side of the upper end surface of the sleeve is welded with the inner wall of the nozzle in a sealing way through vacuum electron beam welding;
The inner wall of the sleeve is provided with an internal thread; the diaphragm limiting block is in a round cake shape, a through hole is formed in the middle of the diaphragm limiting block, external threads are formed in the outer side wall of the diaphragm limiting block, and the diaphragm limiting block is in threaded connection with the sleeve; the lower end surface of the sleeve is used for limiting the displacement of the metal corrugated membrane;
The ejector rod is arranged in the through hole in the middle of the diaphragm limiting block and is connected with the metal corrugated diaphragm.
Further, the connector 1 is a step cylinder with external threads,
The outer surface of the lower end of the connector is provided with a threaded hole for connecting with test equipment;
The lower end face of the joint mouth is provided with a circular groove for placing a sealing ring.
Further, the metal corrugated membrane 2 is a metal disc with annular raised corrugations and planar edges.
Further, a step blind hole is formed in the ejector rod 3 and is connected with a pressure gauge transmission mechanism through the step blind hole.
Further, the lower end of the ejector rod is welded with the metal corrugated membrane, an annular flange is arranged on the lower end face of the ejector rod outwards in the radial direction, and the welding area is increased through the annular flange.
Further, the bottom surface of the diaphragm limiting block 4 is a corrugated surface matched with the metal corrugated diaphragm; the maximum displacement of the metal corrugated membrane is adjusted by adjusting the depth of the membrane limiting block screwed into the sleeve. The diaphragm is elastically deformed upwards under the action of pressure, when the pressure reaches the working set pressure, the metal corrugated diaphragm 2 is fully contacted with the corrugations at the bottom of the limiting block, and the corrugated shapes are fully overlapped, so that the metal corrugated diaphragm cannot be deformed continuously, and the maximum deformation displacement is achieved; when the instantaneous pressure is suddenly increased or exceeds the working allowable pressure during working, the metal corrugated diaphragm 2 cannot be subjected to plastic deformation, cracking and the like due to overlarge displacement, so that the service life of the product can be prolonged.
The utility model has the advantages that: the utility model provides a metal ripple diaphragm manometer solves the manometer when the pressure table when the during operation increases suddenly to surpassing work allowable pressure in the twinkling of an eye pressure, and the diaphragm ripple takes place the phenomenon that faults such as plastic deformation, rupture lead to the manometer to become invalid and sealing washer elasticity reduces, the vibration leads to the connection to become flexible and can appear the pressure leakage phenomenon during operation. The product quality stability is improved, the service life of the product is prolonged, and the method has great technical progress and remarkable technical effect.
Drawings
FIG. 1 is a schematic diagram of a metal bellows diaphragm pressure gauge of the present utility model;
FIG. 2 is a schematic diagram of a conventional diaphragm pressure gauge;
wherein, in fig. 1: 1-joint mouth, 2-metal corrugated membrane, 3-ejector rod, 4-membrane limiting block and 5-sleeve.
In fig. 2: the device comprises a 6-joint, a 7-connecting screw, an 8-upper sealing ring, a 9-press block, a 10-metal corrugated membrane, an 11-ejector rod and a 12-lower sealing ring.
Detailed Description
The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model will be described in further detail below with reference to the drawings by means of specific embodiments. The description of these embodiments is provided to assist understanding of the present utility model, but is not to be construed as limiting the present utility model. In addition, the technical features of the embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
Referring to FIG. 1, in one embodiment. The metal corrugated diaphragm pressure gauge comprises five parts, namely a joint nozzle 1, a metal corrugated diaphragm 2, an ejector rod 3, a diaphragm limiting block 4 and a sleeve 5. The periphery of the metal corrugated membrane 2 is welded with the sleeve 5 in a sealing way through vacuum electron beam welding, the sleeve 5 and the metal corrugated membrane combination 2 are integrally embedded into the joint mouth 1, the top end of the joint mouth 1 is welded in a sealing way through vacuum electron beam welding, and the limiting block 4 is fixed with the inner thread of the sleeve 5 through external threads.
In actual production, the staff first carries out vacuum electron beam welding on the metal corrugated membrane combination 2 and the sleeve 5, and the leak rate detection is carried out on the welded assembly, and the method can effectively avoid the product leakage phenomenon caused by the failure of the upper sealing ring 8 and the lower sealing ring 12 in FIG. 2.
The metal corrugated membrane combination 2 and the sleeve 5 are integrally embedded into the joint mouth 1 to be welded at the top by vacuum electron beam, the method can optimize the structure of the pressure gauge, reduce the number of parts and assembly times, and avoid the air leakage phenomenon caused by loose connection of the connecting screw 7 and the pressing block 9.
In fig. 1, after combination welding, a cavity is formed between the inside of the joint mouth 1 and the sleeve diaphragm assembly, a pressure medium P is applied through a through hole of the joint mouth 1, the diaphragm is elastically deformed upwards under the action of pressure, when the pressure reaches the working set pressure, the diaphragm limiting block 4 is screwed into the sleeve 5 through threads, the bottom ripple of the limiting block is fully contacted with the metal ripple diaphragm 2, and the ripple shape is completely overlapped. After the pressure medium in the inlet nozzle 1 is unloaded, the maximum displacement space is formed between the metal corrugated diaphragm 2 and the diaphragm limiting block, and when the instantaneous pressure is suddenly increased or exceeds the working allowable pressure during working, the metal corrugated diaphragm 2 cannot be subjected to plastic deformation, cracking and other phenomena caused by overlarge displacement, so that the service life of the product can be prolonged.
The foregoing has outlined rather broadly the more detailed description of the utility model in order that the detailed description thereof that follows may be better understood, and in order that the present utility model may be better understood. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
While the present utility model has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the utility model. Many modifications and substitutions of the present utility model will become apparent to those of ordinary skill in the art upon reading the foregoing. Accordingly, the scope of the utility model should be limited only by the attached claims.
Claims (6)
1. A metal corrugated diaphragm pressure gauge is characterized in that: the pressure gauge includes: the device comprises a joint (1), a metal corrugated membrane (2), an ejector rod (3), a membrane limiting block (4) and a sleeve (5);
the whole of the joint mouth is funnel-shaped, an air inlet is arranged below the inner part of the joint mouth, and a step hole is arranged above the inner part of the joint mouth;
The sleeve is cylindrical, the lower end surface of the sleeve is welded with the metal corrugated diaphragm in a sealing way through vacuum electron beam welding, and the welded sleeve is arranged on a step of a step hole above the inside of the joint;
the outer side of the upper end surface of the sleeve is welded with the inner wall of the nozzle in a sealing way through vacuum electron beam welding;
The inner wall of the sleeve is provided with an internal thread; the diaphragm limiting block is in a round cake shape, a through hole is formed in the middle of the diaphragm limiting block, external threads are formed in the outer side wall of the diaphragm limiting block, and the diaphragm limiting block is in threaded connection with the sleeve; the lower end surface of the sleeve is used for limiting the displacement of the metal corrugated membrane;
The ejector rod is arranged in the through hole in the middle of the diaphragm limiting block and is connected with the metal corrugated diaphragm.
2. The metal corrugated diaphragm pressure gauge according to claim 1, wherein the nipple (1) is an externally threaded stepped cylinder,
The outer surface of the lower end of the connector is provided with a threaded hole for connecting with test equipment;
The lower end face of the joint mouth is provided with a circular groove for placing a sealing ring.
3. A metal bellows diaphragm pressure gauge according to claim 1, characterized in that the metal bellows diaphragm (2) is a metal disc with annular raised bellows and planar edges.
4. The metal corrugated diaphragm pressure gauge according to claim 1, wherein a stepped blind hole is formed in the ejector rod (3), and the ejector rod is connected with a pressure gauge transmission mechanism through the stepped blind hole.
5. The metal corrugated diaphragm pressure gauge according to claim 1, wherein the lower end of the ejector rod is welded with the metal corrugated diaphragm, and an annular flange is arranged radially outwards on the lower end surface of the ejector rod for increasing the welding area.
6. The metal corrugated diaphragm pressure gauge according to claim 1, wherein the bottom surface of the diaphragm limiting block (4) is a corrugated surface matched with the metal corrugated diaphragm; the maximum displacement of the metal corrugated membrane is adjusted by adjusting the depth of the membrane limiting block screwed into the sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322596914.6U CN221099942U (en) | 2023-09-22 | 2023-09-22 | Metal corrugated diaphragm pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322596914.6U CN221099942U (en) | 2023-09-22 | 2023-09-22 | Metal corrugated diaphragm pressure gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221099942U true CN221099942U (en) | 2024-06-07 |
Family
ID=91328978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322596914.6U Active CN221099942U (en) | 2023-09-22 | 2023-09-22 | Metal corrugated diaphragm pressure gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221099942U (en) |
-
2023
- 2023-09-22 CN CN202322596914.6U patent/CN221099942U/en active Active
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