CN111678652A - Testing device for coarse leakage detection of sealing performance of sealing ring and testing method using testing device - Google Patents
Testing device for coarse leakage detection of sealing performance of sealing ring and testing method using testing device Download PDFInfo
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- CN111678652A CN111678652A CN202010579297.7A CN202010579297A CN111678652A CN 111678652 A CN111678652 A CN 111678652A CN 202010579297 A CN202010579297 A CN 202010579297A CN 111678652 A CN111678652 A CN 111678652A
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- sealing ring
- sealing
- testing
- top cover
- gas
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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
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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
- G01M13/00—Testing of machine parts
- G01M13/005—Sealing rings
Abstract
The invention provides a testing device for coarse leakage detection of sealing performance of a sealing ring and a gas test method, wherein the testing device comprises a sealing ring matched insert, a shell, a top cover and a gas quick connector; the shell comprises an upper end part and a lower end part, the upper end part is provided with a spigot used for placing the top cover, and the lower end part is provided with a mounting hole used for mounting the gas quick-plug connector; the gas quick-connection plug is used for connecting an external gas source with controllable gas pressure; the top cover is provided with a through hole for inserting the sealing ring. During testing, the sealing ring is inserted into the sealing ring in a manner of matching with the insert, the gas quick-plugging connector is connected into the gas pipe, and the pressure gauge is controlled to be filled with dry and clean air to reach an atmospheric pressure; and (3) immersing the head of the sealing air cavity into a large-capacity transparent container filled with transparent liquid at an angle of 45 degrees downwards, controlling the top of the sealing ring to be positioned 10-15 cm below the liquid level, and observing whether bubbles are generated at the joint of the sealing ring and the sealing ring matched with the insert. The invention can test the sealing performance and has the characteristics of easy assembly, easy operation and the like.
Description
Technical Field
The invention belongs to the technical field of sealing performance detection, and particularly relates to a testing device for coarse leakage detection of sealing performance of a sealing ring and a testing method using the testing device.
Background
Implantable medical devices include cardiac pacemakers, cerebral pacemakers, and the like, and a seal ring is a basic component of such devices, and one of the main functions of the seal ring is to prevent the electrode contacts from being short-circuited due to the invasion of body fluids. After the device is short-circuited, the power consumption is increased, and the use experience of the product is deteriorated. Therefore, the sealing performance of the sealing ring is necessary to be tested, but the sealing performance of the product in the field is not tested by various mechanisms at home and abroad, and therefore, the sealing air cavity is designed for the coarse leakage detection of the sealing performance of the sealing ring of the implanted medical instrument.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a testing device for coarse leakage detection of the sealing performance of a sealing ring and a testing method using the testing device.
The invention provides a testing device for coarse leakage detection of sealing performance of a sealing ring, which comprises: the sealing ring is matched with the insert, the shell, the top cover and the gas quick-plugging connector;
the housing includes an upper end and a lower end; the upper end part is provided with a spigot used for placing the top cover; the lower end part is provided with a mounting hole for mounting the gas quick-plug connector;
the gas quick-connection plug is used for being connected with an external gas source, and the external gas source can output gas with controllable gas pressure;
the top cover is provided with a through hole for inserting the sealing ring;
the sealing ring is matched with the insert and is inserted into the sealing ring when the sealing performance of the sealing ring is detected.
Preferably, the top cover is clearance-fitted to the housing and sealed by laser welding.
As a preferable scheme, the diameter of the through hole of the top cover is smaller than the diameter of the exposed end of the sealing ring and larger than the diameter of the inserted end of the sealing ring, and the sealing ring is inserted into the through hole in clearance fit.
Preferably, the depth of the through hole is larger than the thickness of the working surface of the sealing ring.
Preferably, the seal ring is inserted into the seal ring with an insert to compress the working surface of the seal ring to create a sealing effect.
Preferably, the sealing ring mating insert is a standard bulkhead or an electrode.
Preferably, the mounting hole of the lower end portion is a threaded hole.
Preferably, the housing and the top cover are made of stainless steel.
Preferably, the outer shape of the shell is a cylinder with the diameter not more than 40mm, the volume of the inner cavity is less than 15mL, and the shell can bear at least 2 standard atmospheric pressures.
In another aspect, the present invention provides a method for testing by using the above testing apparatus for coarse leak detection of sealing performance of a sealing ring, including:
inserting the sealing ring into the through hole of the top cover, and coating liquid silicon rubber for sealing around the seam to enable the sealing ring to be fixed on the top cover in a sealing manner;
inserting the sealing ring into the sealing ring to match with an insert, connecting the gas quick-connection plug into a gas pipe, and filling dry and clean air into the gas pipe to reach an atmospheric pressure;
the head of the testing device is inclined downwards at an angle of 45 degrees and is immersed into a transparent container filled with transparent liquid, and the top of the sealing ring is controlled to be positioned 10cm-15cm below the liquid level;
and observing whether bubbles are generated at the joint of the sealing ring and the sealing ring matching insert.
The invention designs a testing device for coarse leak detection of sealing performance aiming at a sealing ring of an implanted medical instrument, can carry out testing by a bubble method, has the characteristics of easy assembly, easy operation and the like, and provides a convenient and easy-to-observe specific testing method for coarse leak detection of sealing performance of the sealing ring of the implanted medical instrument in the field.
Drawings
FIG. 1 is a schematic view of a seal ring being tested;
FIG. 2 is a cross-sectional view of the testing device of the present invention in use;
FIG. 3 is a cross-sectional view of the housing of the testing device of the present invention;
FIG. 4 is a cross-sectional view of a top cover of the testing device of the present invention;
FIG. 5 is a cross-sectional view of a working surface of the test apparatus of the present invention in use;
fig. 6 is a schematic diagram of a bubble method coarse leak detection using the test apparatus of the present invention.
Wherein the meaning of the individual reference symbols is as follows: 1-sealing ring, 2-liquid silicon rubber, 3-sealing ring matching insert, 4-shell, 5-top cover, 6-gas quick connector, 7-spigot, 8-threaded hole, 9-through hole and 10-working surface.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a seal ring to be tested. The sealing ring is a basic component of implantable medical equipment such as a cardiac pacemaker, a cerebral pacemaker and the like, mainly comprises an exposed end 11 and an inserted end 12, and is internally provided with a working surface 10. When the sealing performance of the sealing ring is tested, the sealing ring and the testing device form a sealing air cavity, and the sealing performance test of the sealing ring is converted into the sealing performance test of the sealing air cavity. The test has standard test parameters and comprises coarse leak detection of air tightness test and fine leak detection of air tightness test. The bubble method is used for coarse leak detection. The testing followed the specific test criteria of method 112 seal test section part method A, B, D in GJB 360B-2009 electronic and Electrical elements test methods.
FIG. 2 is a block diagram of the test apparatus of the present invention in use. The testing device comprises a sealing ring matching insert 3, a shell 4, a top cover 5 and a gas quick-connection plug 6. The test is carried out by connecting the gas quick-connection plug 6 into an external gas source with controllable gas pressure. In a preferred embodiment, the gasket-engaging insert 3 is a standard bulkhead or electrode. When the sealing performance of the sealing ring is detected, the sealing ring 1 (to be tested) is installed on the sealing ring matching insert 3.
FIG. 3 is a view showing the structure of the housing of the test apparatus of the present invention. The shell 4 is made of stainless steel, is cylindrical with the diameter not more than 40mm, and is provided with an inner cavity, the volume of the inner cavity is less than 15mL, and the inner cavity can bear at least 2 standard atmospheric pressures. The upper end part of the shell 4 is provided with a spigot 7 which can be put into the top cover 5 to be matched with the spigot; the lower end of the housing 4 has a mounting hole 8 for mounting the gas quick connector 6. In a preferred embodiment, the mounting holes 8 are threaded holes.
FIG. 4 is a top cover structure of the testing device of the present invention. The top cover 5 is preferably made of stainless steel and is placed in the spigot 7 of the housing 4, and the top cover 5 is in clearance fit with the housing 4. In a preferred embodiment, the top cover 5 and the shell 4 are welded by using a laser welding machine, the seam is sealed at a higher level, and sealing detection is carried out after welding, namely, the through hole is blocked after welding to check the airtightness of the welding seam. The top cover 5 is provided with a through hole 9 for inserting the sealing ring 1. The diameter of the through hole 9 is smaller than the exposed end diameter of the seal ring 1 and larger than the insertion end diameter of the seal ring 1. In a preferred embodiment, the through hole 9 is a clearance fit with the insertion end of the sealing ring 1.
Figure 5 is a cross-sectional view of a working surface of the test apparatus of the present invention in use. After the gasket 1 is inserted into the through hole 9, a liquid silicone rubber 2 for sealing is applied around the joint to seal and fix the gasket 1 to the top cover 5. The thickness H of the cap 5 is required to ensure that it completely covers the running surface 10 of the sealing ring 1. When the sealing ring co-operating insert 3 is inserted into the sealing ring 1, the working surface 10 of the sealing ring 1 is compressed, thereby producing a sealing effect.
Fig. 6 is a schematic view of a bubble method rough leak detection of the seal ring 1 using the testing apparatus of the present invention. The steps of using the testing device of the invention to carry out the air tightness coarse leakage detection test on the sealing ring are as follows.
The gasket 1 is inserted into the through hole 9 of the top cover 5, and the liquid silicone rubber 2 for sealing is applied around the joint to seal and fix the gasket 1 to the top cover 5.
Then, a sealing ring matched insert 3 is inserted into the sealing ring 1, a gas quick-connection plug 6 at the lower end is connected into a gas pipe, and a pressure gauge is controlled to be filled with dry and clean air to reach an atmospheric pressure.
The head of the testing device is inclined downwards at an angle of 45 degrees and is immersed into a large-capacity transparent container filled with transparent liquid, and the top of the sealing ring 1 is controlled to be positioned 10cm-15cm below the liquid level. In a preferred embodiment, the transparent container is a glass beaker and the transparent liquid is water.
The seam between the gasket 1 and the gasket mating insert 3 was observed for bubble formation and the rate of bubble formation, recorded in minutes. If continuous bubbles are generated, the sealing property is poor, and if no bubbles are generated, the airtightness is excellent.
The technical personnel in the field can understand that the invention can also be matched with a trace gas fine leak detection method, so as to comprehensively evaluate and compare the sealing performance of the sealing ring and verify the design effect and the production quality of the sealing ring.
The present invention is not limited to the above embodiments, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A testing device for coarse leakage detection of sealing performance of a sealing ring comprises a sealing ring matched insert, a shell, a top cover and a gas quick-connection plug;
the housing includes an upper end and a lower end; the upper end part is provided with a spigot used for placing the top cover; the lower end part is provided with a mounting hole for mounting the gas quick-plug connector;
the gas quick-connection plug is used for being connected with an external gas source, and the external gas source can output gas with controllable gas pressure;
the top cover is provided with a through hole for inserting the sealing ring;
the matching insert is inserted into the sealing ring when the sealing performance of the sealing ring is detected.
2. The device for testing the rough leakage detection of the sealing performance of the sealing ring according to claim 1, characterized in that: the top cover is in clearance fit with the housing and sealed by laser welding.
3. The device for testing the rough leakage detection of the sealing performance of the sealing ring according to claim 2, characterized in that: the diameter of the through hole of the top cover is smaller than the diameter of the exposed end of the sealing ring and larger than the diameter of the inserted end of the sealing ring, and the sealing ring is inserted into the through hole in clearance fit.
4. The device for testing the rough leakage detection of the sealing performance of the sealing ring according to claim 3, wherein: the depth of the through hole is larger than the thickness of the working surface of the sealing ring.
5. The device for testing the rough leakage detection of the sealing performance of the sealing ring according to claim 4, wherein: the sealing ring is inserted into the sealing ring in a matching manner with the insert, so that the working surface of the sealing ring is compressed, and a sealing effect is generated.
6. The device for testing the rough leakage detection of the sealing performance of the sealing ring according to claim 5, wherein: the sealing ring is matched with the insert and is a standard plug or an electrode.
7. The device for testing the rough leakage detection of the sealing performance of the sealing ring according to claim 1, characterized in that: the mounting hole of the lower end part is a threaded hole.
8. The device for testing the rough leakage detection of the sealing performance of the sealing ring according to claim 1, characterized in that: the shell and the top cover are made of stainless steel.
9. The device for testing the rough leakage detection of the sealing performance of the sealing ring according to claim 1, characterized in that: the outer shape of the shell is a cylinder with the diameter not more than 40mm, the volume of the inner cavity is less than 15mL, and the shell can bear at least 2 standard atmospheric pressures.
10. A method for testing the sealing performance of the sealing ring by using the testing device for the coarse leak detection of the sealing performance of the sealing ring as claimed in any one of claims 1 to 9, wherein:
inserting the sealing ring into the through hole of the top cover, and coating liquid silicon rubber for sealing around the seam to enable the sealing ring to be fixed on the top cover in a sealing manner;
inserting the sealing ring into the sealing ring to match with an insert, connecting the gas quick-connection plug into a gas pipe, and filling dry and clean air into the gas pipe to reach an atmospheric pressure;
the head of the testing device is inclined downwards at an angle of 45 degrees and is immersed into a transparent container filled with transparent liquid, and the top of the sealing ring is controlled to be positioned 10cm-15cm below the liquid level;
observing whether bubbles are generated at the joint of the sealing ring and the matching insert.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010579297.7A CN111678652A (en) | 2020-06-23 | 2020-06-23 | Testing device for coarse leakage detection of sealing performance of sealing ring and testing method using testing device |
| PCT/CN2020/141950 WO2021258710A1 (en) | 2020-06-23 | 2020-12-31 | Testing apparatus and method for rough leakage detection of sealing performance of sealing ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010579297.7A CN111678652A (en) | 2020-06-23 | 2020-06-23 | Testing device for coarse leakage detection of sealing performance of sealing ring and testing method using testing device |
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| Publication Number | Publication Date |
|---|---|
| CN111678652A true CN111678652A (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010579297.7A Pending CN111678652A (en) | 2020-06-23 | 2020-06-23 | Testing device for coarse leakage detection of sealing performance of sealing ring and testing method using testing device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111678652A (en) |
| WO (1) | WO2021258710A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229788A (en) * | 2020-12-16 | 2021-01-15 | 南京仪汇仪器设备有限公司 | Corrosion-resistant sealing washer testing arrangement |
| WO2021258710A1 (en) * | 2020-06-23 | 2021-12-30 | 北京品驰医疗设备有限公司 | Testing apparatus and method for rough leakage detection of sealing performance of sealing ring |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114289344B (en) * | 2021-12-31 | 2023-06-23 | 山东新华医疗器械股份有限公司 | Linkage production type vacuum attenuation leak detector |
| CN116124445B (en) * | 2023-04-18 | 2023-06-30 | 山东聚金龙汽车发展有限公司 | Hydrogen fuel cell sealing ring detection device |
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| CN111678652A (en) * | 2020-06-23 | 2020-09-18 | 北京品驰医疗设备有限公司 | Testing device for coarse leakage detection of sealing performance of sealing ring and testing method using testing device |
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2020
- 2020-06-23 CN CN202010579297.7A patent/CN111678652A/en active Pending
- 2020-12-31 WO PCT/CN2020/141950 patent/WO2021258710A1/en active Application Filing
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| CN102607776A (en) * | 2012-03-12 | 2012-07-25 | 陈东明 | Water-proof shell convenient for seal test and seal test method thereof |
| CN104748919A (en) * | 2013-12-25 | 2015-07-01 | 格力电器（武汉）有限公司 | Leak detection device and leak detection method |
| CN105092164A (en) * | 2015-09-08 | 2015-11-25 | 深圳供电局有限公司 | Air tightness detection method of seal ring and detection device thereof |
| KR20170002469U (en) * | 2015-12-30 | 2017-07-10 | 한국남부발전 주식회사 | Leak tester of nozzle for gas turbine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021258710A1 (en) * | 2020-06-23 | 2021-12-30 | 北京品驰医疗设备有限公司 | Testing apparatus and method for rough leakage detection of sealing performance of sealing ring |
| CN112229788A (en) * | 2020-12-16 | 2021-01-15 | 南京仪汇仪器设备有限公司 | Corrosion-resistant sealing washer testing arrangement |
| CN112229788B (en) * | 2020-12-16 | 2021-04-23 | 南京仪汇仪器设备有限公司 | Corrosion-resistant sealing washer testing arrangement |
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| Publication number | Publication date |
|---|---|
| WO2021258710A1 (en) | 2021-12-30 |
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Application publication date: 20200918 |
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