CN116296109A - Bellows air tightness detection device and detection method - Google Patents
Bellows air tightness detection device and detection method Download PDFInfo
- Publication number
- CN116296109A CN116296109A CN202310321337.1A CN202310321337A CN116296109A CN 116296109 A CN116296109 A CN 116296109A CN 202310321337 A CN202310321337 A CN 202310321337A CN 116296109 A CN116296109 A CN 116296109A
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- bellows
- capillary tube
- clamp body
- air
- capsule
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 239000002775 capsule Substances 0.000 claims abstract description 42
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000005086 pumping Methods 0.000 claims abstract description 5
- 239000011229 interlayer Substances 0.000 claims description 7
- 239000011148 porous material Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008213 purified water Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/10—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for containers, e.g. radiators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/007—Malfunction diagnosis, i.e. diagnosing a sensor defect
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Biomedical Technology (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a capsule air tightness detection device and a detection method, wherein the capsule air tightness detection device comprises a clamp, the clamp comprises a first clamp body and a second clamp body, the first clamp body and the second clamp body are mutually hinged, the proximal end of the first clamp body penetrates through and fixes a capillary tube, the other end of the capillary tube is connected with an air pump through a high-pressure air pipe, the first clamp body and the second clamp body are used for clamping a capsule seat of the capsule and enabling a part of the capillary tube to extend into an air inlet hole on the side surface of the capsule seat, and the air pump is used for pumping high-pressure air into the capsule through the high-pressure air pipe and the capillary tube. Immersing the bellows in the liquid, observing whether bubbles appear, and if not, judging that the bellows is qualified in air tightness. Therefore, the capsule air tightness detection device is simple in structure, convenient to operate and high in detection efficiency.
Description
Technical Field
The invention relates to the technical field of bellows, in particular to a bellows air tightness detection device and a detection method.
Background
The bellows pressure gauge adopts a bellows as a sensing element for measuring minute pressure. The method is widely applied to boiler ventilation, gas pipelines, combustion devices and other similar equipment by measuring the micro-pressure and the negative pressure of the gas which has corrosion effect on copper alloy and has no explosion hazard.
The air tightness test of the capsule is to introduce high-purity nitrogen with certain pressure into the inner cavity of the capsule, and immerse the capsule in alcohol or purified water to observe the air tightness of the capsule.
In the original detection flow, a fixing tool is generally adopted to manually clamp and fix the diaphragm capsule, the clamping step is complex, the labor is wasted, and the detection efficiency is low;
in addition, when the gas is introduced, the pressure is high, so that the bellows is easy to deform greatly, the deformation exceeds the deformation range of the material of the bellows, the bellows is permanently deformed, and the function of the bellows is invalid;
in addition, the butt joint of the air inlet of the diaphragm capsule and the tool air tap is difficult to leak air due to poor sealing, so that the judgment of the air tightness of the diaphragm capsule is affected.
Disclosure of Invention
In view of the foregoing drawbacks of the prior art, an object of the present invention is to provide a bellows air tightness detecting device and detecting method, so as to solve one or more of the problems in the prior art.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the utility model provides a bellows gas tightness detection device, bellows gas tightness detection device includes the clamp, the clamp includes the first clamp body, the second clamp body, the first clamp body, the second clamp body are articulated each other, the capillary is passed and fixed to the first clamp body proximal end, the air pump is connected through the high-pressure air pipe to the capillary other end, the first clamp body, the second clamp body are used for pressing from both sides the box seat of bellows and make the capillary partly stretch into the inlet port of box seat side, the air pump is used for pumping high-pressure gas into the bellows through high-pressure air pipe, capillary.
Further, the first clamp body comprises a mouth and a handle connected to the distal end of the mouth, and the capillary tube passes through the mouth.
Further, rubber is arranged around the capillary tube at one side of the proximal end of the mouth close to the box seat.
Further, the side of the proximal end of the mouth, which is far away from the box seat, is welded and connected with the capillary tube.
Further, a limiting groove for clamping the capillary tube is formed in the side face of the far end of the mouth.
Further, the capillary tube is connected with the high-pressure air pipe through a locking piece.
Further, the locking piece comprises a first connecting end and a second connecting end which are connected with each other in a threaded mode, the first connecting end is connected with the capillary tube, and the second connecting end is connected with the high-pressure air tube.
Further, the capillary pore diameter is 0.1mm.
Further, the capsule comprises a capsule seat and a capsule cover connected to the top of the capsule seat, an interlayer is arranged in the capsule cover, and a through hole is arranged in the capsule seat and is respectively communicated with the interlayer and the air inlet.
The detection method using the bellows air tightness detection device comprises the following steps:
the first clamp body and the second clamp body clamp a box seat of the bellows and enable a part of capillary tube to extend into an air inlet hole on the side surface of the box seat;
the air pump pumps high-pressure gas into the diaphragm capsule;
immersing the bellows in the liquid, and observing whether bubbles appear;
if not, judging that the air tightness of the diaphragm capsule is qualified.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the capsule air tightness detection device disclosed by the invention, the capsule seat of the capsule is clamped by the first clamp body and the second clamp body, one part of the capillary tube extends into the air inlet hole on the side surface of the capsule seat, the air pump pumps high-pressure air into the capsule through the high-pressure air pipe and the capillary tube, the capsule is immersed into liquid, whether air bubbles appear or not is observed, and if no air bubbles appear, the capsule air tightness is judged to be qualified. Therefore, the capsule air tightness detection device is simple in structure, convenient to operate and high in detection efficiency.
And (II) further, rubber is arranged around the capillary tube at one side of the near end of the mouth close to the box seat, and the rubber around the capillary tube is clamped and extruded by the clamp so as to fill a gap between the capillary tube and the air inlet hole, so that the air tightness testing precision is ensured.
And thirdly, a limiting groove for clamping the capillary tube is formed in the side face of the far end of the mouth, so that the capillary tube made of stainless steel is prevented from shaking and breaking.
And (IV) the capillary tube is connected with the high-pressure air pipe through a locking piece, and the locking piece comprises a first connecting end and a second connecting end which are connected with each other in a threaded manner, so that the clamp is convenient to detach and replace.
Drawings
Fig. 1 is a schematic front view of a bellows air tightness detection device according to an embodiment of the present invention.
Fig. 2 is a schematic side view of a bellows air tightness detection device according to an embodiment of the present invention.
Fig. 3 is an enlarged schematic view of a bellows air tightness detection device at a position a according to an embodiment of the present invention.
Fig. 4 shows a schematic structural diagram of a bellows in a bellows air tightness detection device according to an embodiment of the present invention.
Fig. 5 shows a connection diagram of a bellows air tightness detection device according to an embodiment of the present invention.
Fig. 6 shows a flowchart of a bellows air tightness detection method according to an embodiment of the present invention.
The reference numerals in the drawings:
1. a first clamp body; 11. a mouth; 111. rubber; 112. a limit groove; 12. a handle; 121. an elastic member; 2. a second clamp body; 3. a capillary tube; 4. a high pressure gas pipe; 5. a locking member; 51. a first connection end; 52. a second connection end; 6. a bellows; 61. a box cover; 62. a box base; 621. a through hole; 622. an air inlet hole; 7. a foot switch; 8. an air pump.
Detailed Description
For a better understanding of the invention with objects, features and advantages, refer to the drawings. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that any modifications, changes in the proportions, or adjustments of the sizes of structures, proportions, or otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or essential characteristics thereof.
In the description of the present invention, the positional or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
To more clearly describe the structure of the bellows air tightness detection device, the present invention defines terms of a distal end and a proximal end, specifically, "distal end" means an end far from the clamp holding bellows 6, and "proximal end" means an end near to the clamp holding bellows 6, taking fig. 1 as an example, an upper end of the first clamp body 1 is a proximal end in fig. 1, and a lower end of the first clamp body 1 is a distal end in fig. 1.
Example 1
Referring to fig. 1, 2, 3, 4 and 5, a bellows air tightness detecting device includes a clamp, the clamp includes a first clamp body 1 and a second clamp body 2, the first clamp body 1 and the second clamp body 2 are hinged to each other at a connection position of a mouth 11 and a handle 12, a proximal end of the first clamp body 1 passes through and fixes a capillary tube 3, the other end of the capillary tube 3 is connected with an air pump 8 through a high-pressure air pipe 4, the first clamp body 1 and the second clamp body 2 are used for clamping a box seat 62 of a bellows 6 and enabling a part of the capillary tube 3 to extend into an air inlet hole 622 on a side surface of the box seat 62, and the air pump 8 is used for pumping high-pressure air into the bellows 6 through the high-pressure air pipe 4 and the capillary tube 3.
The specific structure of the clamp is described below:
referring to fig. 1, 2 and 3, further, the first clamp body 1 includes a mouth 11 and a handle 12 connected to a distal end of the mouth 11, and the capillary 3 passes through the mouth 11. An elastic member 121 is further provided between the handles 12 of the first and second clamp bodies 1 and 2 for preventing the first and second clamp bodies 1 and 2 from clamping and damaging the capillary tube 3 without clamping the bellows 6. Preferably, the handle 12 may also be sleeved with rubber 111 for anti-slip.
Referring to fig. 1 and 3, further, a rubber 111 is disposed around the capillary tube 3 near the side of the cartridge 62 near the proximal end of the mouth 11. Specifically, the aperture of the capillary tube 3 is 0.1mm, and the outer diameter of the capillary tube 3 is smaller than the inner diameter of the air inlet 622, so that a gap is formed between the capillary tube 3 and the air inlet 622 when the capillary tube 3 is inserted into the air inlet 622, and the rubber 111 around the capillary tube 3 is clamped and extruded by a clamp so as to fill the gap between the capillary tube 3 and the air inlet 622, so that the air tightness test precision is ensured.
Referring to fig. 1, 2 and 3, further, the proximal end of the mouth 11 is welded to the capillary tube 3 at a side far away from the cartridge seat 62, so that the capillary tube 3 is firmly fixed.
Referring to fig. 1, 2 and 3, further, a limit groove 112 is provided on the distal side of the mouth 11 for the capillary tube 3 to be clamped. Preferably, a heat shrinkage tube, an adhesive tape and the like can be sleeved outside the mouth 11 at the limit groove 112 for fixing the capillary tube 3, so that the capillary tube 3 made of stainless steel is prevented from shaking and breaking.
Referring to fig. 1 and 2, further, the capillary tube 3 is connected to the high-pressure air tube 4 by a locking member 5.
Referring to fig. 1 and 2, further, the locking member 5 includes a first connecting end 51 and a second connecting end 52 that are connected with each other by threads, the first connecting end 51 is connected with the capillary tube 3, and the second connecting end 52 is connected with the high-pressure air tube 4, so as to facilitate the disassembly and replacement of the clamp.
Referring to fig. 5, the air pump 8 is further connected to a foot switch 7, and the foot switch 7 is manually stepped to control the air pump 8 to be opened or closed, so that the air pump 8 provides air pressure of 1-2 MPa each time when being opened, and the bellows 6 is prevented from being permanently deformed due to overlarge air pressure.
Referring to fig. 4, further, the bellows 6 includes a case seat 62, a case cover 61 connected to the top of the case seat 62, an interlayer is disposed in the case cover 61, and a through hole 621 is disposed in the case seat 62 and is respectively communicated with the interlayer and the air inlet hole 622.
The detection method using the bellows air tightness detection device comprises the following steps:
s1, the first clamp body 1 and the second clamp body 2 clamp the box seat 62 of the membrane box 6, and a part of the capillary tube 3 extends into an air inlet hole 622 on the side surface of the box seat 62;
specifically, the cover 61 of the bellows 6 faces upwards, a part of the capillary tube 3 extends into the air inlet 622 on the side surface of the box seat 62, and simultaneously the first clamp body 1 and the second clamp body 2 are clamped, so that the rubber 111 around the capillary tube 3 is extruded to fill the gap between the capillary tube 3 and the air inlet 622.
S2, pumping high-pressure gas into the diaphragm capsule 6 by the air pump 8;
specifically, the air pump 8 is started, the operator presses the foot switch 7 to open the air valve, and the high-pressure air pumped by the air pump 8 sequentially passes through the high-pressure air pipe 4, the capillary tube 3, the air inlet 622 and the through hole 621 to enter the interlayer of the box cover 61 of the diaphragm capsule 6.
S3, immersing the diaphragm capsule 6 in the liquid, and observing whether bubbles appear;
specifically, the operator holds the clamp to clamp the bellows 6 and immerse it in the liquid. The liquid may be alcohol, purified water, etc.
And S4, if not, judging that the air tightness of the capsule 6 is qualified.
Specifically, the cover 61 of the bellows 6 deforms after being inflated, and if bubbles appear after immersing in the liquid, the bellows 6 is judged to be unqualified in air tightness. If no bubble appears after immersing in the liquid, the air tightness of the bellows 6 is judged to be qualified.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. 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 invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The utility model provides a bellows gas tightness detection device which characterized in that: the capsule air tightness detection device comprises a clamp, the clamp comprises a first clamp body and a second clamp body, the first clamp body and the second clamp body are mutually hinged, the proximal end of the first clamp body penetrates through and fixes a capillary tube, the other end of the capillary tube is connected with an air pump through a high-pressure air tube, the first clamp body and the second clamp body are used for clamping a capsule seat of the capsule and enabling a part of the capillary tube to extend into an air inlet hole on the side face of the capsule seat, and the air pump is used for pumping high-pressure air into the capsule through the high-pressure air tube and the capillary tube.
2. A bellows air tightness detecting device as defined in claim 1, wherein: the first clamp body comprises a mouth and a handle connected to the distal end of the mouth, and the capillary tube passes through the mouth.
3. A bellows air tightness detecting device as defined in claim 2, wherein: rubber is arranged around the capillary tube at one side of the near end of the mouth close to the box seat.
4. A bellows air tightness detecting device as defined in claim 3, wherein: the side of the proximal end of the mouth, which is far away from the box seat, is welded and connected with the capillary tube.
5. A bellows air tightness detecting device as defined in claim 2, wherein: and a limiting groove for clamping the capillary tube is formed in the side face of the far end of the mouth.
6. A bellows air tightness detecting device as defined in claim 1, wherein: the capillary tube is connected with the high-pressure air pipe through a locking piece.
7. The bellows air tightness detecting device according to claim 6, wherein: the locking piece comprises a first connecting end and a second connecting end which are connected with each other in a threaded mode, the first connecting end is connected with the capillary tube, and the second connecting end is connected with the high-pressure air tube.
8. A bellows air tightness detecting device as defined in claim 1, wherein: the capillary pore diameter is 0.1mm.
9. A bellows air tightness detecting device as defined in claim 1, wherein: the diaphragm capsule comprises a box seat and a box cover connected to the top of the box seat, wherein an interlayer is arranged in the box cover, and a through hole is arranged in the box seat and is respectively communicated with the interlayer and the air inlet.
10. A detection method using the bellows air tightness detection apparatus according to any of claims 1 to 9, characterized by comprising the steps of:
the first clamp body and the second clamp body clamp a box seat of the bellows and enable a part of capillary tube to extend into an air inlet hole on the side surface of the box seat;
the air pump pumps high-pressure gas into the diaphragm capsule;
immersing the bellows in the liquid, and observing whether bubbles appear;
if not, judging that the air tightness of the diaphragm capsule is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310321337.1A CN116296109A (en) | 2023-03-29 | 2023-03-29 | Bellows air tightness detection device and detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310321337.1A CN116296109A (en) | 2023-03-29 | 2023-03-29 | Bellows air tightness detection device and detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116296109A true CN116296109A (en) | 2023-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310321337.1A Pending CN116296109A (en) | 2023-03-29 | 2023-03-29 | Bellows air tightness detection device and detection method |
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| Country | Link |
|---|---|
| CN (1) | CN116296109A (en) |
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2023
- 2023-03-29 CN CN202310321337.1A patent/CN116296109A/en active Pending
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