CN210689952U - Sealing structure for dry type leakage detection of filter - Google Patents
Sealing structure for dry type leakage detection of filter Download PDFInfo
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- CN210689952U CN210689952U CN201921458726.4U CN201921458726U CN210689952U CN 210689952 U CN210689952 U CN 210689952U CN 201921458726 U CN201921458726 U CN 201921458726U CN 210689952 U CN210689952 U CN 210689952U
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- air guide
- guide cover
- mounting seat
- filter
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Abstract
The utility model discloses a sealing structure for dry type leak detection of a filter, which comprises an air guide cover for placing the filter and a mounting seat which is arranged in a way of being adaptive to the air guide cover, wherein the mounting seat is arranged below the air guide cover, the air guide cover is in an inverted groove shape, the mounting seat is in a ladder shape, the shape of the small-size end of the mounting seat is adaptive to the shape of the lower end of the inner cavity of the air guide cover, and the side surface of the large-size end of the mounting seat is flush with the side surface of the air guide cover; a sealing groove is formed in the side face of the small-size end, and a sealing ring is arranged in the sealing groove; the upper end surface of the air guide cover is provided with a screw hole connected with the cylinder, the air guide cover is provided with a pressure measuring port, the mounting seat is provided with an air inlet, and an air inlet channel of the mounting seat is communicated with an inner cavity of a filter arranged in the air guide cover. The utility model discloses a radial seal form, air guide cover and mount pad rigid contact have eliminated the pressure fluctuation in the air guide cover in the testing process completely, have reduced the pressure stabilization time, have improved efficiency of software testing.
Description
Technical Field
The utility model relates to a seal structure for filter dry-type leaks hunting.
Background
Conventional filter detection methods include helium mass spectrometry, bubble method, static pressure method, U-tube method, etc., which are all performed by charging a filter with gas in advance and then testing whether the gas in the filter leaks. The structure of the current dry type measuring sealing device is shown in fig. 1: the air guide cover 2 is pushed to be pressed downwards by the air cylinder 1, the air guide cover 2 is in contact with the mounting seat 5, and sealing between the air guide cover 2 and the mounting seat 5 is achieved through the sealing ring 4. As the sealing form between the air guide hood 2 and the mounting seat 5 is axial sealing, the long-term use shows that the lower part of the air guide hood 2 is easy to be extruded, deformed and damaged, and the sealing effect is influenced. And because of the relation of the hardness of the sealing ring 4, the sealing element still has micro deformation in the test process, so that the pressure in the air guide cover 2 fluctuates, the pressure stabilization time needs to be prolonged, and the test efficiency is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the defects in the prior art and providing a sealing structure for dry leak detection of a filter, wherein the gas guide cover is in rigid contact with the mounting seat, so that the pressure fluctuation in the gas guide cover in the test process is completely eliminated, the pressure stabilization time is shortened, and the test efficiency is improved; the air guide cover is in rigid contact with the mounting seat, the contact surface is increased, the damage such as extrusion deformation is not easy to generate, the sealing of the air guide cover is not affected by local damage, and the service life of the air guide cover is prolonged.
In order to achieve the purpose, the technical scheme of the utility model is to design a sealing structure for dry leak detection of a filter, which comprises an air guide cover for placing the filter and a mounting seat which is installed in a matching way with the air guide cover, wherein the mounting seat is positioned below the air guide cover, the air guide cover is in an inverted groove shape, the mounting seat is in a ladder shape, the shape of the small-size end of the mounting seat is matched with the shape of the lower end of the inner cavity of the air guide cover, and the side surface of the large-size end of the mounting seat is flush with the side surface of the air guide cover; a sealing groove is formed in the side face of the small-size end, and a sealing ring is arranged in the sealing groove; the upper end surface of the air guide cover is provided with a screw hole connected with the cylinder, the air guide cover is provided with a pressure measuring port, the mounting seat is provided with an air inlet, and an air inlet channel of the mounting seat is communicated with an inner cavity of a filter arranged in the air guide cover. Of course, the side of the large-size end of the mounting base can also extend beyond the side of the scoop, but flush is a more preferred solution.
The further technical scheme is that an air inlet channel of the mounting seat comprises a first air inlet channel which is coaxial with the rotation axis of the filter, a stud which is in threaded connection with a threaded cover plate of the filter is arranged in the first air inlet channel in a matched mode, a through air channel is arranged in the middle of the stud, and an air inlet is communicated with the first air inlet channel through a second air inlet channel.
The gas guide cover is formed by detachably connecting a circular tubular cover body and an upper end cover, a sealing groove is formed in the circular tubular cover body, and a sealing ring is arranged in the sealing groove; the pressure measuring port is arranged on the side surface of the air guide cover and communicated with the inner cavity of the air guide cover; the air guide cover and the mounting seat are both made of rigid materials. The original cylindrical form of the mounting seat is changed into a stepped cylindrical form, so that the original axial sealing is changed into radial sealing, the air guide cover is in rigid contact with the mounting seat, the contact surface is enlarged, the damage such as extrusion deformation and the like is not easy to generate, the sealing of the air guide cover is not influenced by local damage, and the service life of the air guide cover is prolonged; the mounting seat can also adopt a stepped square column shape, and the air guide cover is formed by detachably connecting a square tubular cover body and an upper end cover; the sealing ring is a square sealing ring.
The action process is as follows: the cylinder promotes the air guide cover and pushes down, and the air guide cover contacts the mounting base to realize the sealing between air guide cover and the mounting base through the sealing washer. Then air is introduced into the first air inlet channel and the second air inlet channel through the air inlets, air enters the inner cavity of the filter in the middle of the air guide cover through the ventilation channel of the stud, and finally the air reaches the pressure measuring port to be tested.
The utility model has the advantages and the beneficial effects that: the radial sealing mode is adopted, the air guide cover is in rigid contact with the mounting seat, the pressure fluctuation in the air guide cover in the testing process is completely eliminated, the pressure stabilizing time is shortened, and the testing efficiency is improved; the air guide cover is in rigid contact with the mounting seat, the contact surface is increased, the damage such as extrusion deformation is not easy to generate, the sealing of the air guide cover is not affected by local damage, and the service life of the air guide cover is prolonged.
Drawings
FIG. 1 is a schematic diagram of a prior art configuration;
FIG. 2 is a schematic view showing the working state of a sealing structure for dry leak detection of a filter according to the present invention;
fig. 3 is an enlarged schematic view of the lower end portion of fig. 2.
In the figure: 1. a cylinder; 2. a gas guide hood; 2-1, a cover body; 2-2, an upper end cover; 3. a filter; 4. a seal ring; 5. a mounting seat; 6. a screw hole; 7. a pressure measuring port; 8. an air inlet; 9. a first air inlet channel; 10. a stud; 11. a vent passage; 12. a second air inlet channel; 13. and (4) a sealing ring.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 2 and 3, the utility model relates to a sealing structure for dry leak detection of a filter, which comprises an air guide cover 2 for placing the filter 3 and a mounting seat 5 matched and mounted with the air guide cover 2, wherein the mounting seat 5 is positioned below the air guide cover 2, the air guide cover 2 is in an inverted groove shape, the mounting seat 5 is in a ladder shape, the shape of the small-size end of the mounting seat 5 is matched with the shape of the lower end of the inner cavity of the air guide cover 2, and the side surface of the large-size end of the mounting seat 5 is flush with the side surface of the air guide cover 2; a sealing groove is formed in the side face of the small-size end, and a sealing ring 4 is arranged in the sealing groove; the upper end surface of the air guide cover 2 is provided with a screw hole 6 connected with the cylinder 1, the air guide cover 2 is provided with a pressure measuring port 7, the mounting seat 5 is provided with an air inlet 8, and an air inlet channel of the mounting seat 5 is communicated with an inner cavity of the filter 3 arranged in the air guide cover 2. The air inlet channel of the mounting seat 5 comprises a first air inlet channel 9 which is coaxial with the rotation axis of the filter 3, a stud 10 which is in threaded connection with the threaded cover plate of the filter 3 is arranged in the first air inlet channel 9 in a matching mode, a through air channel 11 is arranged in the middle of the stud 10, and the air inlet 8 is communicated with the first air inlet channel 9 through a second air inlet channel 12. The mounting seat 5 is in a stepped cylindrical shape, the air guide cover 2 is formed by detachably connecting a circular tubular cover body 2-1 and an upper end cover 2-2, a sealing groove is formed in the circular tubular cover body 2-1, and a sealing ring 13 is arranged in the sealing groove; the pressure measuring port 7 is arranged on the side surface of the air guide cover 2 and communicated with the inner cavity of the air guide cover 2; the air guide hood 2 and the mounting seat 5 are made of rigid materials.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A sealing structure for dry leak detection of a filter is characterized by comprising an air guide cover for placing the filter and a mounting seat which is mounted in a matching way with the air guide cover, wherein the mounting seat is positioned below the air guide cover, the air guide cover is in an inverted groove shape, the mounting seat is in a step shape, the shape of the small-size end of the mounting seat is matched with the shape of the lower end of the inner cavity of the air guide cover, and the side surface of the large-size end of the mounting seat is flush with the side surface of the air guide cover; a sealing groove is formed in the side face of the small-size end, and a sealing ring is arranged in the sealing groove; the upper end surface of the air guide cover is provided with a screw hole connected with the cylinder, the air guide cover is provided with a pressure measuring port, the mounting seat is provided with an air inlet, and an air inlet channel of the mounting seat is communicated with an inner cavity of a filter arranged in the air guide cover.
2. The sealing structure for dry leak hunting of the filter as claimed in claim 1, wherein the air inlet passage of the mounting seat comprises a first air inlet passage coaxial with the rotation axis of the filter, a stud bolt in threaded connection with the threaded cover plate of the filter is adapted to be arranged in the first air inlet passage, a through air passage is arranged in the middle of the stud bolt, and the air inlet is communicated with the first air inlet passage through the second air inlet passage.
3. A sealing structure for dry-type leak hunting of a filter according to claim 2, wherein said mounting seat is in a stepped cylindrical shape, said air guide cover is formed by detachably connecting a circular tubular cover body and an upper end cap, a sealing groove is provided on the circular tubular cover body, and a sealing ring is provided in the sealing groove; the pressure measuring port is arranged on the side surface of the air guide cover and communicated with the inner cavity of the air guide cover; the air guide cover and the mounting seat are both made of rigid materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921458726.4U CN210689952U (en) | 2019-09-04 | 2019-09-04 | Sealing structure for dry type leakage detection of filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921458726.4U CN210689952U (en) | 2019-09-04 | 2019-09-04 | Sealing structure for dry type leakage detection of filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210689952U true CN210689952U (en) | 2020-06-05 |
Family
ID=70892847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921458726.4U Active CN210689952U (en) | 2019-09-04 | 2019-09-04 | Sealing structure for dry type leakage detection of filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210689952U (en) |
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2019
- 2019-09-04 CN CN201921458726.4U patent/CN210689952U/en active Active
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