CN112816153A - Stable airtight testing device that leads to pressure and can detect simultaneously by multiunit sample - Google Patents
Stable airtight testing device that leads to pressure and can detect simultaneously by multiunit sample Download PDFInfo
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- CN112816153A CN112816153A CN202011641251.XA CN202011641251A CN112816153A CN 112816153 A CN112816153 A CN 112816153A CN 202011641251 A CN202011641251 A CN 202011641251A CN 112816153 A CN112816153 A CN 112816153A
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- pump body
- rotating shaft
- workbench
- pressure
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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
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses an air tightness testing device capable of detecting multiple groups of samples simultaneously by stable pressure relief, which comprises a workbench, a protection box, a rotating shaft, a driven wheel and a fixed plate, wherein the bottom end of the workbench is provided with a supporting base, the workbench is provided with a first electric telescopic rod, the first electric telescopic rod is provided with a movable sliding block, the protection box is provided with an air supply device, the air supply device is provided with a motor, and the motor is arranged on the protection box. This but airtight testing arrangement of stable through-pressure multiunit sample while detecting, through the drive between pulley group and gear, thereby realize simultaneously carrying out the simultaneous action to the three pump body, make fixed plate and air inlet unit closely laminate each other promptly through the screw, thereby be convenient for the gas supply line to carry out the air feed pressurization in the pump body, thereby no longer need the manual work to carry out the fixed of changeing, and can detect simultaneously to the three pump body, labour saving and time saving more, effectual reduction labour cost.
Description
Technical Field
The invention relates to the technical field of air tightness testing, in particular to an air tightness testing device capable of simultaneously detecting multiple groups of samples through stable pressure.
Background
In the airtight test mainly used industrial production process, ventilate the detection to pipeline, the pump body and the device casing of accomplishing the production to whether there is hole or crack on can discovering the sample rapidly, thereby can be quick effectual sort the substandard product, avoid follow-up in-service problem to cause huge loss.
However, some problems also exist in the process of detecting the pump body, for example, a common detection mode is that workers fix the vent pipe on the pump body through screws, then the vent pipe is subjected to vent detection, the detection can only be performed in sequence in the process, time is consumed, the working efficiency is low, the screws need to be continuously screwed manually, and the labor intensity of people is increased.
Disclosure of Invention
The invention aims to provide an air tightness testing device capable of detecting multiple groups of samples simultaneously by stable pressure, which solves the problem that in the background technology, only sequential detection can be carried out, and screws need to be screwed manually and continuously.
In order to achieve the purpose, the invention provides the following technical scheme: an airtight testing device capable of detecting multiple groups of samples simultaneously and stably realizing pressure relief comprises a workbench, a protection box, a rotating shaft, a driven wheel and a fixed plate, wherein a supporting base is installed at the bottom end of the workbench, a first electric telescopic rod is installed on the workbench, a movable slider is installed on the first electric telescopic rod, the protection box is connected with the movable slider, the movable slider is attached to the workbench, an air supply device is installed on the protection box, a motor is placed on the air supply device, the motor is placed on the protection box, the rotating shaft is connected with the protection box, the rotating shaft is installed on the motor, a belt wheel set is installed on the rotating shaft, the rotating shaft is connected with the driving wheel, the driven wheel is installed on the air supply pipeline, and the air supply pipeline is connected with the protection box, meanwhile, a gas supply pipeline is arranged on a gas supply device, a fixed plate is connected with the gas supply pipeline, the fixed plate is connected with a rotating shaft, a threaded rod is arranged on the rotating shaft, a first sealing gasket is arranged on the fixed plate, the threaded rod is connected with the gas supply device, the gas supply device is mutually attached to the gas supply pipeline, the gas supply device is arranged on a pump body, the pump body is mutually attached to a limiting rod, the limiting rod is arranged on a placing plate, the pump body is placed on the placing plate, the placing plate is arranged on a workbench, a gas outlet device is arranged on the pump body, the gas outlet device is mutually attached to a pressure sensor, the pressure sensor is arranged on a second sealing gasket, the second sealing gasket is arranged at the bottom end of the bearing plate, a second electric telescopic rod is arranged at the upper end of the bearing plate, and the second electric, and the fixed back plate is arranged on the workbench, the fixed back plate is provided with a limiting device, and the limiting device is connected with the bearing plate.
Preferably, the movable sliding block is arranged in a T shape, and the movable sliding block is in sliding connection with the workbench through a groove formed in the workbench.
Preferably, the driving wheel and the fixing plate form a rotating mechanism through a rotating shaft, and the number of the driving wheels is 4 with respect to the center of the fixing plate at equal angles.
Preferably, the diameter of the driven wheel is 2 times of that of the driving wheel, and the driven wheel is connected with the air supply pipeline through a bearing arranged on the air supply pipeline.
Preferably, the equal angle of air inlet unit is seted up 4 and is run through the screw hole, and air inlet unit passes through its upper end screw hole and is connected with the threaded rod.
Preferably, the gag lever post sets up to cylindric, and the gag lever post surface sets up to smooth to the gag lever post is being placed the board equidistance and is being provided with 3 groups.
Preferably, the second sealing gasket is arranged in a T shape, and the second sealing gasket is made of rubber.
Preferably, stop device includes return spring and fixed sleeve, and installs return spring on the stop device to return spring and fixed sleeve interconnect, fixed sleeve installs on fixed backplate, and fixed sleeve and stop device laminate each other.
Preferably, the number of the fixed sleeves is 2 about the center symmetry of the second electric telescopic rod, and the fixed sleeves are in sliding connection with the limiting device through holes formed in the upper ends of the fixed sleeves.
Compared with the prior art, the invention has the beneficial effects that: the air tightness testing device capable of detecting a plurality of groups of samples simultaneously and stably through pressure realizes the simultaneous action on three pump bodies through the driving between the belt pulley group and the gears, namely, the fixing plate and the air inlet device are tightly attached to each other through the screws, so that the air supply pipeline can conveniently supply air and pressurize the air in the pump bodies, the fixation of rotation by manpower is not needed, the three pump bodies can be simultaneously detected, the time and the labor are saved, and the labor cost is effectively reduced;
1. the threaded rod arranged at the upper end of the rotating shaft is driven to rotate through the rotation of the rotating shaft, the fixed plate moves towards the direction close to the air inlet device under the action of the threaded rod, the air inlet device is sealed under the action of the first sealing gasket, and then the interior of the pump body is ventilated and pressurized through the air supply pipeline;
2. the position of accepting the board is changed through the realization of second electric telescopic handle to along with accepting the motion of board, also changing the position of pressure sensor and second sealed pad, detect the pressure in the pump body through pressure sensor promptly, thereby realize detecting the gas tightness of the pump body.
Drawings
FIG. 1 is a schematic cross-sectional view of a gas outlet device according to the present invention;
FIG. 2 is a schematic sectional view of a belt pulley set according to the present invention;
FIG. 3 is a schematic side sectional view of a fixing plate according to the present invention;
FIG. 4 is a schematic top sectional view of the pump body of the present invention;
FIG. 5 is a schematic side sectional view of an air inlet device according to the present invention;
FIG. 6 is a side view, cross-sectional view of the driving wheel of the present invention;
FIG. 7 is an enlarged view of the structure at A in FIG. 1 according to the present invention.
In the figure: 1. a work table; 2. a support base; 3. a first electric telescopic rod; 4. moving the slide block; 5. a protection box; 6. a gas supply device; 7. an electric motor; 8. a rotating shaft; 9. a pulley set; 10. a driving wheel; 11. a driven wheel; 12. a gas supply duct; 13. a fixing plate; 14. a first gasket; 15. an air intake device; 16. a threaded rod; 17. a pump body; 18. a limiting rod; 19. placing the plate; 20. an air outlet device; 21. a pressure sensor; 22. a second gasket; 23. a bearing plate; 24. a second electric telescopic rod; 25. fixing the back plate; 26. a limiting device; 2601. a return spring; 2602. and fixing the sleeve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, the present invention provides a technical solution: a stable pressure-through air tightness testing device capable of simultaneously detecting a plurality of groups of samples comprises a workbench 1, a supporting base 2, a first electric telescopic rod 3, a movable sliding block 4, a protection box 5, an air supply device 6, a motor 7, a rotating shaft 8, a belt pulley group 9, a driving wheel 10, a driven wheel 11, an air supply pipeline 12, a fixed plate 13, a first sealing gasket 14, an air inlet device 15, a threaded rod 16, a pump body 17, a limiting rod 18, a placing plate 19, an air outlet device 20, a pressure sensor 21, a second sealing gasket 22, a bearing plate 23, a second electric telescopic rod 24, a fixed back plate 25, a limiting device 26, a return spring 2601 and a fixed sleeve 2602, wherein the supporting base 2 is installed at the bottom end of the workbench 1, the first electric telescopic rod 3 is installed on the workbench 1, the movable sliding block 4 is installed on the first electric telescopic rod 3, the protection box 5 is connected with, and the movable slider 4 and the work table 1 are attached to each other, the protection box 5 is provided with an air supply device 6, the air supply device 6 is provided with a motor 7, the motor 7 is arranged on the protection box 5, a rotating shaft 8 is connected with the protection box 5, the rotating shaft 8 is arranged on the motor 7, a belt pulley group 9 is arranged on the rotating shaft 8, the rotating shaft 8 is connected with a driving wheel 10, a driven wheel 11 is connected with the driving wheel 10, the driven wheel 11 is arranged on an air supply pipeline 12, the air supply pipeline 12 is connected with the protection box 5, the air supply pipeline 12 is arranged on the air supply device 6, a fixing plate 13 is connected with the air supply pipeline 12, the fixing plate 13 is connected with the rotating shaft 8, the rotating shaft 8 is provided with a threaded rod 16, the fixing plate 13 is provided with a first sealing gasket 14, and the threaded rod 16 is, and the air inlet device 15 and the air supply pipeline 12 are mutually attached, the air inlet device 15 is installed on the pump body 17, the pump body 17 and the limiting rod 18 are mutually attached, the limiting rod 18 is installed on the placing plate 19, the pump body 17 is placed on the placing plate 19, the placing plate 19 is installed on the workbench 1, the air outlet device 20 is installed on the pump body 17, the air outlet device 20 and the pressure sensor 21 are mutually attached, the pressure sensor 21 is installed on the second sealing gasket 22, the second sealing gasket 22 is installed at the bottom end of the bearing plate 23, the second electric telescopic rod 24 is installed at the upper end of the bearing plate 23, the second electric telescopic rod 24 is installed on the fixed back plate 25, the fixed back plate 25 is installed on the workbench 1, the limiting device 26 is installed on the fixed back plate 25, and the limiting device 26 and the bearing plate 23 are mutually connected.
In the embodiment, the movable sliding block 4 is arranged in a T shape, and the movable sliding block 4 is in sliding connection with the workbench 1 through a groove formed in the workbench 1, so that the moving range of the protection box 5 is conveniently limited through the movable sliding block 4, and the protection box 5 is conveniently driven to move through the movable sliding block 4;
the driving wheel 10 and the fixed plate 13 form a rotating mechanism through the rotating shaft 8, and 4 driving wheels 10 are arranged at equal angles relative to the center of the fixed plate 13, so that the driving wheel 10 can freely rotate, and 4 driving wheels 10 are arranged at equal angles relative to the center of the fixed plate 13, so that the driving wheel 10 can drive the threaded rod 16 to rotate;
the diameter of the driven wheel 11 is 2 times of that of the driving wheel 10, and the driven wheel 11 is connected with the air supply pipeline 12 through a bearing arranged on the air supply pipeline 12, so that the driving wheel 10 can be driven to rotate conveniently through the driven wheel 11, the driven wheel 11 is connected with the air supply pipeline 12 through the bearing arranged on the air supply pipeline 12, and the rotation of the driven wheel 11 is not influenced while the driven wheel 11 is supported and limited;
4 through threaded holes are formed in the air inlet device 15 at equal angles, the air inlet device 15 is connected with the threaded rod 16 through the threaded hole in the upper end of the air inlet device, and the distance between the fixing plate 13 and the air inlet device 15 is changed while the threaded rod 16 rotates;
the limiting rod 18 is cylindrical, the outer surface of the limiting rod 18 is smooth, 3 groups of limiting rods 18 are arranged on the placing plate 19 at equal intervals, and by the structure, the friction force between the limiting rod 18 and the pump body 17 can be effectively reduced, and the pump body 17 can be positioned conveniently through the limiting rod 18;
the second sealing gasket 22 is arranged in a T shape, and the second sealing gasket 22 is made of rubber, so that the pump body 17 can be conveniently sealed when the pressure sensor 21 detects the pressure in the pump body 17;
the limiting device 26 comprises a return spring 2601 and a fixing sleeve 2602, the return spring 2601 is mounted on the limiting device 26, the return spring 2601 is connected with the fixing sleeve 2602, the fixing sleeve 2602 is mounted on the fixing back plate 25, and the fixing sleeve 2602 is attached to the limiting device 26, so that the movement range and the movement direction of the bearing plate 23 are limited conveniently through the structure;
the number of the fixing sleeves 2602 is 2 about the center symmetry of the second electric telescopic rod 24, and the fixing sleeves 2602 are slidably connected with the limiting device 26 through the holes formed in the upper ends of the fixing sleeves 2602, so that the limiting device 26 can freely move on the fixing sleeves 2602.
The working principle is as follows: when the airtightness of the pump body 17 needs to be detected, the pump body 17 is placed on a placing plate 19 in fig. 4, a hole formed in the pump body 17 is attached to a limiting rod 18 mounted on the placing plate 19, so that the first electric telescopic rod 3 in fig. 1 starts to operate, because the first electric telescopic rod 3 is connected to the moving slider 4, the moving slider 4 starts to move rightwards under the action of the first electric telescopic rod 3, the protection box 5 mounted on the moving slider 4 starts to move along with the movement of the moving slider 4, the motor 7 is connected to an external power supply, the motor 7 starts to operate, because the output end of the motor 7 is connected to the rotating shaft 8, the rotating shaft 8 also starts to rotate, and along with the rotation of the rotating shaft 8, the belt pulley set 9 mounted on the rotating shaft 8 also starts to rotate, that is, the rotating shafts 8 of three stations are driven to rotate, as can be seen from fig. 7, the driving wheel 10 is mounted on the rotating shaft 8, so the driving wheel 10 at the top end starts to rotate, and as the driving wheel 10 at the top end in fig. 6 rotates, the driven wheel 11 engaged with the driving wheel starts to rotate under the action of the bearing mounted on the air supply duct 12, at this time, the driven wheel 11 drives the other three driving wheels 10 engaged with the driven wheel to rotate, that is, the four rotating shafts 8 connected with the driving wheels 10 start to rotate, and because the rotating shafts 8 in fig. 7 are mounted with the threaded rods 16, and the threaded rods 16 are connected with the air inlet device 15 through the threaded holes formed in the air inlet device 15, the threaded rods 16 start to move in the direction close to the air inlet device 15 until the first gasket 14 mounted on the fixing plate 13 is tightly attached to the air inlet device 15;
the second electric telescopic rod 24 in fig. 1 is started to work, because the second electric telescopic rod 24 and the receiving plate 23 are connected with each other, the receiving plate 23 starts to move downwards under the action of the second electric telescopic rod 24 until the second sealing gasket 22 arranged at the lower end of the receiving plate 23 is attached to the top end of the air outlet device 20, at this time, the air supply device 6 in fig. 1 starts to supply air and pressurize through the air supply pipeline 12, because the air supply pipeline 12 is connected with the pump body 17, the air enters the pump body 17, at this time, the pressure sensor 21 starts to continuously monitor the pressure in the pump body 17, when the value detected by the pressure sensor 21 is observed again after a period of time, the air tightness of the pump body 17 can be detected, and when the detection is finished, the second electric telescopic rod 24, the motor 7 and the first electric telescopic rod 3 move in the direction opposite to the above movement, so that the bearing plate 23 moves upwards, the threaded rod 16 in fig. 7 moves towards the direction far away from the air inlet device 15, the device is not attached to the air inlet device 15 any more, then the pump body 17 in fig. 1 is lifted upwards, the pump body 17 is not attached to the limiting rod 18 any more, and at the moment, the detection process of the pump body 17 is completed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a but stable airtight testing arrangement who presses multiunit sample and detect simultaneously, includes workstation (1), guard box (5), axis of rotation (8), follows driving wheel (11) and fixed plate (13), its characterized in that: the automatic cleaning device is characterized in that a supporting base (2) is installed at the bottom end of the workbench (1), a first electric telescopic rod (3) is installed on the workbench (1), a movable sliding block (4) is installed on the first electric telescopic rod (3), the protection box (5) is connected with the movable sliding block (4) in an interconnecting mode, the movable sliding block (4) is attached to the workbench (1) in an interconnecting mode, an air supply device (6) is installed on the protection box (5), a motor (7) is placed on the air supply device (6), the motor (7) is placed on the protection box (5), a rotating shaft (8) is connected with the protection box (5) in an interconnecting mode, the rotating shaft (8) is installed on the motor (7), a belt wheel set (9) is installed on the rotating shaft (8), meanwhile, the rotating shaft (8) is connected with a driving wheel (10) in an interconnecting mode, and the driven wheel (11) is connected, and the driven wheel (11) is installed on the gas supply pipeline (12), the gas supply pipeline (12) is connected with the protection box (5), the gas supply pipeline (12) is installed on the gas supply device (6), the fixing plate (13) is connected with the gas supply pipeline (12), the fixing plate (13) is connected with the rotating shaft (8), the rotating shaft (8) is provided with a threaded rod (16), the fixing plate (13) is provided with a first sealing gasket (14), the threaded rod (16) is connected with the gas inlet device (15), the gas inlet device (15) is attached with the gas supply pipeline (12), the gas inlet device (15) is installed on the pump body (17), the pump body (17) is attached with the limiting rod (18), the limiting rod (18) is installed on the placing plate (19), and the pump body (17) is placed on the placing plate (19), place board (19) simultaneously and install on workstation (1), install air outlet means (20) on the pump body (17), and air outlet means (20) and pressure sensor (21) laminate each other to pressure sensor (21) are installed on second sealed pad (22), and second sealed pad (22) are installed and are being accepted the bottom of board (23) simultaneously, accept board (23) upper end and install second electric telescopic handle (24), and second electric telescopic handle (24) are installed on fixed backplate (25), and install on workstation (1) fixed backplate (25), install stop device (26) on fixed backplate (25), and stop device (26) and accept board (23) interconnect.
2. The airtightness testing apparatus according to claim 1, wherein the stable pressure-applied pressure is capable of simultaneously testing a plurality of sets of samples, and wherein: the movable sliding block (4) is arranged in a T shape, and the movable sliding block (4) is in sliding connection with the workbench (1) through a groove formed in the workbench (1).
3. The airtightness testing apparatus according to claim 1, wherein the stable pressure-applied pressure is capable of simultaneously testing a plurality of sets of samples, and wherein: the driving wheel (10) and the fixed plate (13) form a rotating mechanism through a rotating shaft (8), and 4 driving wheels (10) are arranged at equal angles relative to the center of the fixed plate (13).
4. The airtightness testing apparatus according to claim 1, wherein the stable pressure-applied pressure is capable of simultaneously testing a plurality of sets of samples, and wherein: the diameter of the driven wheel (11) is 2 times of that of the driving wheel (10), and the driven wheel (11) is connected with the air supply pipeline (12) through a bearing arranged on the air supply pipeline (12).
5. The airtightness testing apparatus according to claim 1, wherein the stable pressure-applied pressure is capable of simultaneously testing a plurality of sets of samples, and wherein: 4 through thread holes are formed in the air inlet device (15) at equal angles, and the air inlet device (15) is connected with the threaded rod (16) through the thread hole in the upper end of the air inlet device.
6. The airtightness testing apparatus according to claim 1, wherein the stable pressure-applied pressure is capable of simultaneously testing a plurality of sets of samples, and wherein: the limiting rod (18) is set to be cylindrical, the outer surface of the limiting rod (18) is set to be smooth, and 3 groups of limiting rods (18) are arranged on the placing plate (19) at equal intervals.
7. The airtightness testing apparatus according to claim 1, wherein the stable pressure-applied pressure is capable of simultaneously testing a plurality of sets of samples, and wherein: the second sealing gasket (22) is arranged in a T shape, and the second sealing gasket (22) is made of rubber.
8. The airtightness testing apparatus according to claim 1, wherein the stable pressure-applied pressure is capable of simultaneously testing a plurality of sets of samples, and wherein: stop device (26) include return spring (2601) and fixed sleeve (2602), and install return spring (2601) on stop device (26) to return spring (2601) and fixed sleeve (2602) interconnect, fixed sleeve (2602) are installed on fixed backplate (25), and fixed sleeve (2602) and stop device (26) laminate each other.
9. The apparatus for testing airtightness of claim 8, wherein the stable pressure is applied to the apparatus for testing airtightness of a plurality of sets of samples simultaneously, and wherein: the fixed sleeves (2602) are symmetrically arranged about the center of the second electric telescopic rod (24), and the fixed sleeves (2602) are in sliding connection with the limiting device (26) through holes formed in the upper ends of the fixed sleeves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011641251.XA CN112816153B (en) | 2020-12-31 | 2020-12-31 | Airtight testing device capable of stably and simultaneously detecting multiple groups of samples through pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011641251.XA CN112816153B (en) | 2020-12-31 | 2020-12-31 | Airtight testing device capable of stably and simultaneously detecting multiple groups of samples through pressure |
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| Publication Number | Publication Date |
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| CN112816153A true CN112816153A (en) | 2021-05-18 |
| CN112816153B CN112816153B (en) | 2023-08-11 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0902268A2 (en) * | 1997-09-13 | 1999-03-17 | Wolfgang Rausch GmbH & Co. Electronic-Maschinenbau | Pressure testing apparatus |
| CN103292964A (en) * | 2013-06-21 | 2013-09-11 | 无锡博进精密机械制造有限公司 | Pump leakage detecting device |
| CN106768677A (en) * | 2016-11-30 | 2017-05-31 | 芜湖立创包装有限公司 | For the air tightness detection apparatus of packing tube |
| CN109374226A (en) * | 2018-10-26 | 2019-02-22 | 怀化智信能源科技有限公司 | A kind of ammeter production shell quality detection device |
| CN209979143U (en) * | 2019-05-29 | 2020-01-21 | 宁波云电智能控制技术有限公司 | Airtightness testing device |
| CN111562065A (en) * | 2018-10-16 | 2020-08-21 | 黄茴茴 | Water-cooled machine gas tightness detecting instrument |
-
2020
- 2020-12-31 CN CN202011641251.XA patent/CN112816153B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0902268A2 (en) * | 1997-09-13 | 1999-03-17 | Wolfgang Rausch GmbH & Co. Electronic-Maschinenbau | Pressure testing apparatus |
| CN103292964A (en) * | 2013-06-21 | 2013-09-11 | 无锡博进精密机械制造有限公司 | Pump leakage detecting device |
| CN106768677A (en) * | 2016-11-30 | 2017-05-31 | 芜湖立创包装有限公司 | For the air tightness detection apparatus of packing tube |
| CN111562065A (en) * | 2018-10-16 | 2020-08-21 | 黄茴茴 | Water-cooled machine gas tightness detecting instrument |
| CN109374226A (en) * | 2018-10-26 | 2019-02-22 | 怀化智信能源科技有限公司 | A kind of ammeter production shell quality detection device |
| CN209979143U (en) * | 2019-05-29 | 2020-01-21 | 宁波云电智能控制技术有限公司 | Airtightness testing device |
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| CN112816153B (en) | 2023-08-11 |
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