CN110595703B - Device and method for detecting tightness of vacuum tube of solar water heater - Google Patents
Device and method for detecting tightness of vacuum tube of solar water heater Download PDFInfo
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- CN110595703B CN110595703B CN201910785298.4A CN201910785298A CN110595703B CN 110595703 B CN110595703 B CN 110595703B CN 201910785298 A CN201910785298 A CN 201910785298A CN 110595703 B CN110595703 B CN 110595703B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title description 3
- 238000007789 sealing Methods 0.000 claims abstract description 68
- 230000002093 peripheral effect Effects 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims description 20
- 238000003491 array Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a device for detecting tightness of a vacuum tube of a solar water heater, and relates to the technical field of tightness detection. The invention comprises a base, wherein a first cylinder is fixed on the surface of the base; the inner wall of the first cylinder body is provided with a sleeve; the peripheral side surface of the first sleeve is provided with a first air hole; the inner wall of the first sleeve is rotationally connected with a first sealing cylinder; the surface of the base is provided with a guide rod; the peripheral side surface of the guide rod is in sliding fit with a second cylinder; the peripheral side surface of the first cylinder body is provided with a second air hole; the inner wall of the second cylinder body is rotationally connected with a second sealing cylinder. According to the invention, the gap between the first cylinder body and the sleeve is opened and closed through the first sealing cylinder, the air pressure in the gap between the first cylinder body and the sleeve is monitored by the first pressure gauge, so that the tightness of the outer wall of the vacuum tube is detected, the opening and closing of the second cylinder body is performed, the air pressure in the second cylinder body is monitored by the second pressure gauge, the inner wall of the vacuum tube is detected, and the accuracy of tightness detection of the vacuum tube is improved.
Description
Technical Field
The invention belongs to the technical field of tightness detection, and particularly relates to a device for detecting tightness of a vacuum tube of a solar water heater.
Background
The solar water heater vacuum tube is a core element of the solar water heater, is praised as the heart of the solar water heater, and the quality of the vacuum tube directly influences the service life and the performance of the solar water heater, so that the rapid development of the solar energy industry also drives the development of vacuum tube enterprises.
The existing vacuum tube tightness detection method is that a water immersion method is adopted: the vacuum tube to be tested is soaked into water, and the tightness of the container is judged by observing whether bubbles exist or not and how much bubbles exist.
Disclosure of Invention
The invention aims to provide a vacuum tube tightness detection device for a solar water heater, which solves the problem of poor detection precision of the existing vacuum tube tightness detection device through the matched use of a first cylinder body, a first sealing cylinder, a second cylinder body and a second sealing cylinder.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a device for detecting the tightness of a vacuum tube of a solar water heater, which comprises a base, wherein a first cylinder is fixed on the surface of the base; a sleeve is arranged between the opposite surfaces of the inner wall of the first cylinder; the peripheral side surface arrays of the sleeve are provided with first air holes; the inner wall of the sleeve is rotatably connected with a first sealing cylinder; the peripheral side surface arrays of the first sealing cylinder are provided with first communication holes matched with the first air holes;
the surface of the base is provided with a guide rod at one end of the first cylinder; the peripheral side surface of the guide rod is in sliding fit with a second cylinder; the second cylinder body is provided with second air holes in an array on the peripheral side face; the inner wall of the second cylinder body is rotatably connected with a second sealing cylinder; the peripheral side surface arrays of the second sealing cylinder are provided with second communication holes matched with the second air holes.
Further, a first annular groove is formed in the inner side of one end of the first cylinder; one end of the first cylinder body is provided with first arc grooves communicated with the first annular grooves in an array manner; the peripheral side surface of the first cylinder body is respectively communicated with a first air inlet pipe and a first pressure gauge; the other end of the first cylinder body is provided with a sealing groove; the first barrel is provided with a first gasket inside one end of the first barrel.
Further, a first sealing lip matched with the first annular groove is arranged on the peripheral side surface of one end of the first sealing cylinder; and one end of the first sealing cylinder is provided with an array of first rotary shifting sheets matched with the first arc-shaped grooves.
Further, a second ring groove is formed in the inner side of one end of the second cylinder; one end of the second cylinder body is provided with a second arc-shaped groove communicated with the second annular groove in an array manner; one end of the second cylinder is respectively communicated with a second air inlet pipe and a second pressure gauge.
Further, a second sealing lip matched with the second annular groove is arranged on the peripheral side surface of one end of the second sealing cylinder; and a second rotary plectrum matched with the second arc-shaped groove is arranged at one end of the second sealing cylinder in an array manner.
Further, a third sealing lip and a second gasket matched with the sealing groove are respectively arranged on the inner side of one end of the second cylinder body.
Further, an air cylinder is fixed on the surface of the base; one end of the cylinder piston rod is fixedly connected with the second cylinder body.
A detection method of a solar water heater vacuum tube tightness detection device comprises the following steps;
SS01, the inner cavity of the vacuum tube is sleeved on the surface of the second cylinder, the outer wall of the second cylinder is mutually attached to the inner cavity of the vacuum tube, the cylinder pushes the second cylinder to move so that the vacuum tube is inserted into the sleeve, the inner wall of the sleeve is mutually attached to the outer wall of the vacuum tube, and the sealing groove is mutually matched with the third sealing lip; sealing the first cylinder and the second cylinder from each other; the first gasket and the second gasket protect two ends of the vacuum tube respectively.
And SS02, rotating a first rotary plectrum, wherein the first rotary plectrum drives the first sealing cylinder to enable the first air holes and the first communication holes to be staggered, so that the first air holes on the peripheral side surface of the sleeve are closed, and the first air holes are externally connected with an air pump through the first air inlet pipe to inflate the gap between the first cylinder and the sleeve, and after inflation is finished, the first pressure gauge detects and records the air pressure in the gap between the first cylinder and the sleeve.
SS03: the first rotary plectrum is rotated, the first rotary plectrum drives the first sealing cylinder to enable the first air hole and the first communication hole to be communicated with each other, the first pressure gauge detects and records the air pressure in the gap between the first cylinder and the sleeve, if the detected air pressure value of the first pressure gauge is unchanged, the sealing performance of the outer wall of the vacuum tube is good, and the follow-up steps are continued; if the detected air pressure value of the first pressure gauge is gradually reduced, a leak exists on the outer wall of the vacuum tube, and subsequent steps are not needed.
SS04: and the second rotary plectrum is rotated, and drives the second sealing cylinder to enable the second air holes and the second communication holes to be staggered, so that the first air holes are closed, the second cylinder is inflated by an external air pump of the second air inlet pipe, and after inflation is completed, the second pressure gauge detects and records the air pressure of the second cylinder.
SS05: and the second rotary plectrum is rotated, the second rotary plectrum drives the second sealing cylinder to enable the second air hole and the second communication hole to be communicated with each other, the second pressure gauge detects and records the air pressure in the second cylinder, if the detected air pressure value of the second pressure gauge is unchanged, the tightness of the inner wall of the vacuum tube is good, and if the detected air pressure value of the second pressure gauge is gradually reduced, the inner wall of the vacuum tube is provided with a leak.
The invention has the following beneficial effects:
according to the invention, the gap between the first cylinder body and the sleeve is opened and closed through the first sealing cylinder, the air pressure in the gap between the first cylinder body and the sleeve is monitored by the first pressure gauge, so that the tightness of the outer wall of the vacuum tube is detected, the opening and closing of the second cylinder body is carried out, the air pressure in the second cylinder body is monitored by the second pressure gauge, the inner wall of the vacuum tube is detected, the tightness detection precision of the vacuum tube is improved, and the vacuum tube is not required to be cleaned and dried after detection is completed, so that the vacuum tube has high practicability.
Of course, it is not necessary for any one product to practice the invention to achieve all of the advantages set forth above at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a device for detecting tightness of a vacuum tube of a solar water heater;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a cross-sectional view of a solar water heater vacuum tube tightness detection device;
FIG. 4 is an enlarged view of FIG. 3 at B;
FIG. 5 is an enlarged view of FIG. 3 at C;
FIG. 6 is a schematic structural view of a first seal cartridge;
FIG. 7 is a schematic structural view of a second seal cartridge;
in the drawings, the list of components represented by the various numbers is as follows:
1-base, 2-first barrel, 3-first seal barrel, 4-guide rod, 5-second barrel, 6-second seal barrel, 7-cylinder, 201-sleeve, 202-first air hole, 203-first annular groove, 204-first arc groove, 205-first air inlet pipe, 206-first pressure gauge, 207-seal groove, 208-first gasket, 301-first communication hole, 302-first seal lip, 303-first rotary plectrum, 501-second air hole, 502-second annular groove, 503-second arc groove, 504-second air inlet pipe, 505-second pressure gauge, 506-third seal lip, 507-second gasket, 601-second communication hole, 602-second seal lip, 603-second rotary plectrum.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-7, the invention relates to a device for detecting tightness of a vacuum tube of a solar water heater, which comprises a base 1, wherein a first cylinder 2 is fixed on the surface of the base 1; a sleeve 201 is arranged between the opposite surfaces of the inner wall of the first cylinder 2; the peripheral side surface array of the sleeve 201 is provided with first air holes 202; the inner wall of the sleeve 201 is rotatably connected with a first sealing cylinder 3; the first sealing cylinder 3 is provided with first communication holes 301 matched with the first air holes 202 in an array on the peripheral side surface;
the surface of the base 1 and one end of the first cylinder 2 are provided with a guide rod 4; the second cylinder 5 is in sliding fit with the peripheral side surface of the guide rod 4; the second cylinder 5 is provided with second air holes 501 in the side surface array; the inner wall of the second cylinder body 5 is rotatably connected with a second sealing cylinder 6; the second sealing cylinder 6 is provided with second communication holes 601 matched with the second air holes 501 in an array on the peripheral side surface.
Wherein, a first ring groove 203 is formed on the inner side of one end of the first cylinder 2; one end of the first cylinder 2 is provided with a first arc-shaped groove 204 communicated with the first annular groove 203 in an array manner; the peripheral side surface of the first cylinder 2 is respectively communicated with a first air inlet pipe 205 and a first pressure gauge 206; the other end of the first cylinder 2 is provided with a sealing groove 207; a first gasket 208 is arranged inside one end of the first cylinder 1 and inside the sleeve 201.
Wherein, a first sealing lip 302 matched with the first ring groove 203 is arranged on the peripheral side surface of one end of the first sealing cylinder 3; the first seal cylinder 3 is provided with a first rotary plectrum 303 matched with the first arc-shaped groove 204 at one end array.
Wherein, a second ring groove 502 is arranged on the inner side of one end of the second cylinder 5; one end of the second cylinder 5 is provided with a second arc-shaped groove 503 communicated with the second annular groove 502 in an array manner; one end of the second cylinder 5 is respectively communicated with a second air inlet pipe 504 and a second pressure gauge 505.
Wherein, a second sealing lip 602 matched with the second ring groove 502 is arranged on one end circumference side surface of the second sealing cylinder 6; the second seal cylinder 6 is provided with a second rotary plectrum 603 at one end array, which is matched with the second arc-shaped groove 503.
Wherein, a third sealing lip 506 and a second gasket 507 which are matched with the sealing groove 207 are respectively arranged on the inner side of one end of the second cylinder body 5.
Wherein, the surface of the base 1 is fixed with a cylinder 7; one end of a piston rod of the air cylinder 7 is fixedly connected with the second cylinder body 5.
One specific application of this embodiment is: the detection method is as follows;
SS01, the inner cavity of the vacuum tube is sleeved on the surface of the second cylinder 5, the outer wall of the second cylinder 5 is mutually attached to the inner cavity of the vacuum tube, the cylinder 7 pushes the second cylinder 5 to move so that the vacuum tube is inserted into the sleeve 201, the inner wall of the sleeve 201 is mutually attached to the outer wall of the vacuum tube, and the sealing groove 207 is mutually matched with the third sealing lip 506; sealing the first cylinder 2 and the second cylinder 5 from each other; the first gasket 208 and the second gasket 507 protect the two ends of the vacuum tube respectively.
SS02, rotating the first rotary dial 303, wherein the first rotary dial 303 drives the first sealing cylinder 3 to enable the first air holes 202 and the first communication holes 301 to be staggered, so that the first air holes 202 on the peripheral side surface of the sleeve 201 are closed, an external air pump is connected to the first air inlet pipe 205 to inflate the gap between the first cylinder 2 and the sleeve 201, and after inflation is completed, the first pressure gauge 206 detects and records the air pressure in the gap between the first cylinder 2 and the sleeve 201.
SS03: rotating the first rotary pulling piece 303, wherein the first rotary pulling piece 303 drives the first sealing cylinder 3 to enable the first air hole 202 and the first communication hole 301 to be communicated with each other, the first pressure gauge 206 detects and records the air pressure in the gap between the first cylinder 2 and the sleeve 201, and if the detected air pressure value of the first pressure gauge 206 is unchanged, the sealing performance of the outer wall of the vacuum tube is good, and the subsequent steps are continued; if the detected air pressure value of the first pressure gauge 206 gradually decreases, a leak exists on the outer wall of the vacuum tube, and no subsequent steps are required.
SS04: the second rotary pulling piece 603 is rotated, the second rotary pulling piece 603 drives the second sealing cylinder 6 to enable the second air hole 501 and the second communication hole 601 to be staggered, so that the first air hole 202 is closed, an external air pump is connected to the second air inlet pipe 504 to inflate the inside of the second cylinder 5, and after inflation is completed, the second pressure gauge 505 detects and records the air pressure of the second cylinder 5.
SS05: the second rotary pulling piece 603 is rotated, the second rotary pulling piece 603 drives the second sealing cylinder 6 to enable the second air hole 501 and the second communication hole 601 to be communicated with each other, the second pressure gauge 505 detects and records air pressure in the second cylinder 5, if the detected air pressure value of the second pressure gauge 505 is unchanged, the sealing performance of the inner wall of the vacuum tube is good, and if the detected air pressure value of the second pressure gauge 505 is gradually reduced, a leak exists in the inner wall of the vacuum tube.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (3)
1. The utility model provides a solar water heater vacuum tube leakproofness detection device, includes base (1), its characterized in that:
the surface of the base (1) is fixed with a first cylinder (2); a sleeve (201) is arranged between opposite surfaces of the inner wall of the first cylinder (2); the circumferential side surface arrays of the sleeve (201) are provided with first air holes (202); the inner wall of the sleeve (201) is rotatably connected with a first sealing cylinder (3); the peripheral side surface arrays of the first sealing cylinder (3) are provided with first communication holes (301) matched with the first air holes (202);
a guide rod (4) is arranged on the surface of the base (1) and positioned at one end of the first cylinder (2); the peripheral side surface of the guide rod (4) is in sliding fit with a second cylinder (5); second air holes (501) are formed in the peripheral side face array of the second cylinder (5); the inner wall of the second cylinder body (5) is rotatably connected with a second sealing cylinder (6); the peripheral side surface arrays of the second sealing cylinder (6) are provided with second communication holes (601) matched with the second air holes (501);
a first annular groove (203) is formed in the inner side of one end of the first cylinder body (2); one end of the first cylinder body (2) is provided with first arc grooves (204) communicated with the first annular grooves (203) in an array manner; the peripheral side surface of the first cylinder body (2) is respectively communicated with a first air inlet pipe (205) and a first pressure gauge (206); the other end of the first cylinder body (2) is provided with a sealing groove (207); a first gasket (208) is arranged inside one end of the first cylinder (1) and inside the sleeve (201);
one end of the first sealing cylinder (3) is provided with a first rotary plectrum (303) matched with the first arc-shaped groove (204) in an array manner;
a second ring groove (502) is formed in the inner side of one end of the second cylinder body (5); one end of the second cylinder body (5) is provided with a second arc-shaped groove (503) communicated with the second annular groove (502) in an array manner; one end of the second cylinder (5) is respectively communicated with a second air inlet pipe (504) and a second pressure gauge (505);
one end of the second sealing cylinder (6) is provided with a second rotary plectrum (603) matched with the second arc-shaped groove (503) in an array manner; a third sealing lip (506) and a second gasket (507) which are matched with the sealing groove (207) are respectively arranged on the inner side of one end of the second cylinder body (5); an air cylinder (7) is fixed on the surface of the base (1); one end of a piston rod of the air cylinder (7) is fixedly connected with the second cylinder body (5);
the detection method adopting the solar water heater vacuum tube tightness detection device comprises the following steps:
SS01, the inner cavity of the vacuum tube is sleeved on the surface of the second cylinder (5), the outer wall of the second cylinder (5) is mutually attached to the inner cavity of the vacuum tube, the cylinder (7) pushes the second cylinder (5) to move so that the vacuum tube is inserted into the sleeve (201), the inner wall of the sleeve (201) is mutually attached to the outer wall of the vacuum tube, and the sealing groove (207) is mutually matched with the third sealing lip (506); sealing the first cylinder (2) and the second cylinder (5) from each other; the first gasket (208) and the second gasket (507) respectively protect the two ends of the vacuum tube;
SS02, rotating the first rotary plectrum (303), the first rotary plectrum (303) drives the first sealing cylinder (3) to enable the first air holes (202) and the first communication holes (301) to be staggered, so that the first air holes (202) on the peripheral side surface of the sleeve (201) are closed, an external air pump is connected to the first air inlet pipe (205) to inflate the gap between the first cylinder (2) and the sleeve (201), and after inflation is completed, the first pressure gauge (206) detects and records the air pressure in the gap between the first cylinder (2) and the sleeve (201);
SS03: rotating the first rotary plectrum (303), wherein the first rotary plectrum (303) drives the first sealing cylinder (3) to enable the first air hole (202) and the first communication hole (301) to be communicated with each other, the first pressure gauge (206) detects and records the air pressure in the gap between the first cylinder (2) and the sleeve (201), if the detected air pressure value of the first pressure gauge (206) is unchanged, the sealing performance of the outer wall of the vacuum tube is good, and the subsequent steps are continued; if the detected air pressure value of the first pressure gauge (206) gradually decreases, a leak exists on the outer wall of the vacuum tube, and subsequent steps are not needed;
SS04: the second rotary plectrum (603) is rotated, the second rotary plectrum (603) drives the second sealing cylinder (6) to enable the second air hole (501) and the second communication hole (601) to be staggered, so that the first air hole (202) is closed, an external air pump is connected to the second air inlet pipe (504) to charge air into the second cylinder (5), and after the air charging is finished, the second pressure gauge (505) detects and records the air pressure of the second cylinder (5);
SS05: and the second rotary shifting sheet (603) is rotated, the second rotary shifting sheet (603) drives the second sealing cylinder (6) to enable the second air hole (501) and the second communication hole (601) to be communicated with each other, the second pressure gauge (505) detects and records the air pressure in the second cylinder (5), if the detected air pressure value of the second pressure gauge (505) is unchanged, the tightness of the inner wall of the vacuum tube is good, and if the detected air pressure value of the second pressure gauge (505) is gradually reduced, the inner wall of the vacuum tube is provided with a leak.
2. The device for detecting the tightness of the vacuum tube of the solar water heater according to claim 1, wherein a first sealing lip (302) matched with the first annular groove (203) is arranged on the peripheral side surface of one end of the first sealing cylinder (3).
3. The device for detecting the tightness of the vacuum tube of the solar water heater according to claim 1, wherein a second sealing lip (602) matched with the second annular groove (502) is arranged on the peripheral side surface of one end of the second sealing cylinder (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910785298.4A CN110595703B (en) | 2019-08-23 | 2019-08-23 | Device and method for detecting tightness of vacuum tube of solar water heater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910785298.4A CN110595703B (en) | 2019-08-23 | 2019-08-23 | Device and method for detecting tightness of vacuum tube of solar water heater |
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| CN110595703A CN110595703A (en) | 2019-12-20 |
| CN110595703B true CN110595703B (en) | 2024-03-26 |
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Families Citing this family (2)
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| CN117589392B (en) * | 2023-11-24 | 2024-05-28 | 山东龙普太阳能股份有限公司 | Solar vacuum tube leak protection gas detection device |
| CN117906882B (en) * | 2024-03-20 | 2024-05-24 | 烟台焕发新能源有限公司 | Air tightness detection equipment for air cylinders |
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