CN108332921B - Shielding centrifugal pump gas tightness testing arrangement - Google Patents
Shielding centrifugal pump gas tightness testing arrangement Download PDFInfo
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- CN108332921B CN108332921B CN201810110783.7A CN201810110783A CN108332921B CN 108332921 B CN108332921 B CN 108332921B CN 201810110783 A CN201810110783 A CN 201810110783A CN 108332921 B CN108332921 B CN 108332921B
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- fixed
- shell
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- elastic sealing
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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
Abstract
The invention discloses a gas tightness testing device of a shielding centrifugal pump, which comprises an inner container, a shell and a pump body, wherein the inner container is fixed on the inner wall of the top of the shell, a partition plate is fixed inside the inner container and divides the inner container into a detection groove and a mounting groove, an opening is arranged at the position, corresponding to the detection groove, of the top of the shell, a sealing cover is arranged at the top of the opening, one side of the sealing cover is movably connected with the shell through a hinge, the other side of the sealing cover is clamped with the shell through a lock catch, a lifting device is fixed inside the detection groove, the pump body is placed at the output end of the lifting device, one end of the pump body is provided with a gas inlet, a temperature control device is arranged outside the inner container, the temperature control device comprises a mounting shell, a heating pipe, a blowing device, a temperature sensor and a control panel, the mounting shell is, and make the pump body better with detection device's connection leakproofness, reduced the error that the pump body gas tightness detected.
Description
Technical Field
The invention relates to the technical field of shielding centrifugal pump air tightness testing, in particular to a shielding centrifugal pump air tightness testing device.
Background
The conventional centrifugal pump is driven by connecting an impeller shaft of the pump with an electric shaft through a coupling so that the impeller and the motor rotate together to work, while the canned pump is a sealless pump, and the pump and a driving motor are both sealed in a pressure vessel filled with a pumped medium, the pressure vessel is only provided with static seals, and a rotating magnetic field is provided by an electric wire set and drives a rotor. The structure eliminates a rotating shaft sealing device of the traditional centrifugal pump, so that the leakage can be completely avoided.
After the production of canned motor pump is accomplished, need detect the gas tightness of the pump body, prior art is comparatively simple to canned motor pump gas tightness detection's device structure, and is lower with the connection leakproofness of the pump body, makes the detection data error great, especially under the great environment of temperature difference change, because the change of temperature easily arouses the change of gas volume, is unfavorable for the reasonable detection of pump body gas tightness. Therefore, the airtightness testing device for the shielded centrifugal pump is provided.
Disclosure of Invention
The invention aims to provide a shielding centrifugal pump air tightness testing device to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a shielding centrifugal pump air tightness testing device comprises an inner container, a shell and a pump body, wherein the inner container is fixed on the inner wall of the top of the shell, a partition plate is fixed inside the inner container and divides the inside of the inner container into a detection groove and a mounting groove, an opening is formed in the position, corresponding to the detection groove, of the top of the shell, a sealing cover is arranged at the top of the opening, one side of the sealing cover is movably connected with the shell through a hinge, the other side of the sealing cover is clamped with the shell through a lock catch, a lifting device is fixed inside the detection groove, the pump body is placed at the output end of the lifting device, an air inlet is formed in one end of the pump body, a temperature control device is arranged on the outer side of the inner container and comprises an installation shell, a heating pipe, an air blowing device, a temperature sensor and a control panel, the installation shell is located on the outer side, the air blowing device is fixed on the inner walls of two sides of the installation shell, the heating pipe and the temperature sensor are fixed on the inner wall of the bottom of the installation shell, the temperature sensor is electrically connected with the control panel, the control panel is electrically connected with the heating pipe, the air blowing device and the heating pipe are electrically connected with the control panel, the control panel is fixed on the outer side of the shell, the detection device is fixed on the inner wall of the bottom of the shell, and the output end of the detection device is connected with the air inlet.
Preferably, elevating gear includes elevator motor, mount, a screw thread section of thick bamboo, bearing plate and threaded rod, the bottom of a screw thread section of thick bamboo is passed through the bearing and is connected with the mount rotation, elevator motor's output shaft is fixed with the bottom of a screw thread section of thick bamboo, elevator motor all fixes on the inner wall of casing bottom with the mount, a screw thread section of thick bamboo runs through the inside of installation shell and inner bag, and a screw thread section of thick bamboo rotates through the bottom of bearing and installation shell and inner bag respectively and is connected, the threaded rod passes through screw thread swing joint in the inboard of a screw thread section of thick bamboo, the top and the bearing plate of threaded rod are fixed, the pump body is placed on.
Preferably, guide rails are symmetrically fixed on two sides of the detection groove, sliding grooves are formed in positions, corresponding to the guide rails, of the bearing plate, and the sliding grooves are in sliding connection with the guide rails.
Preferably, the blower device comprises a blower motor and fan blades, the blower motor is fixed to the outer side of the mounting shell, an output shaft of the blower motor penetrates through the mounting shell to be fixed to the fan blades, and the output shaft of the blower motor is rotatably connected with the mounting shell through a bearing.
Preferably, detection device includes air pump, air duct, gas-supply pipe, pressure chamber, baroceptor and connecting piece, the air pump is fixed on the inner wall of casing bottom, the output of air pump passes through the air duct and is connected with the pressure chamber, the bottom at the mounting groove is fixed to the pressure chamber, baroceptor fixes on the inner wall of pressure chamber bottom, the top of pressure chamber is passed through the gas-supply pipe and is fixed with the connecting piece, the connecting piece is connected with the air inlet.
Preferably, the connecting piece includes mounting flange, fixing bolt, compresses tightly subassembly, elastic sealing backing plate and elastic sealing piece, the outside of air inlet is fixed with flange, mounting flange passes through fixing bolt and flange is fixed, one side that mounting flange is close to flange is fixed with elastic sealing backing plate through compressing tightly the subassembly, elastic sealing piece is located the inboard of air inlet, and the inner wall interference fit of elastic sealing piece and air inlet, elastic sealing piece is kept away from one side that compresses tightly the subassembly with elastic sealing backing plate and is fixed, the one end that the pressure chamber was kept away from to the gas-supply pipe is fixed with elastic sealing piece, and communicates with the air inlet.
Preferably, one end of the elastic sealing block, which is far away from the elastic sealing cushion plate, is of a conical structure.
Preferably, the pressing assembly comprises a first pressing plate, a second pressing plate and a compression spring, one side of the first pressing plate is fixed with the fixing flange, the compression spring is fixed between the first pressing plate and the second pressing plate, and the second pressing plate is fixed with the elastic sealing base plate.
Preferably, the outer side of the mounting shell is fixed with heat preservation cotton.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can carry out constant temperature detection on the air tightness of the pump body, and the connection tightness between the pump body and the detection device is better, the error of the air tightness detection of the pump body is reduced, when in detection, the rotation of the lifting motor drives the rotation of the thread cylinder, the threaded rod is movably connected to the inner side of the thread cylinder through the threads, the top of the threaded rod is fixed with the bearing part, the rotation of the thread cylinder drives the bearing plate to move upwards, when the bearing plate is close to the bottom of the opening, the lifting motor stops rotating, the pump body is placed on the bearing plate, then the connecting piece is connected with the air inlet at one end of the pump body, after the connection, the pump body is conveyed to the inside of the detection groove through the rotation of the lifting motor, at the moment, the opening is sealed through the sealing cover, the air pressure in the pressure cavity is increased through the air pump, the pressure cavity, the atmospheric pressure of the pressure chamber is equal to the atmospheric pressure of the pump body, the pressure intensity change in the pressure chamber is detected through the air pressure sensor, the detection of the air tightness of the pump body is realized, the heating pipe is controlled through the control panel to heat the air in the installation shell, the temperature of the air is detected through the temperature sensor and fed back to the control panel, the constant temperature control of the air in the installation shell is realized, the heated air and the air in the detection groove are subjected to heat exchange, and therefore the constant temperature environment for detecting the pump body is realized.
2. The invention prevents the bearing plate from tilting during up-and-down movement through the sliding fit action of the guide rail and the sliding groove, the rotation of the blower motor drives the rotation of the fan blades, the rotation of the fan blades enables the inside of the mounting shell to generate air flow, so that the temperature of the air in the mounting shell is more uniform, one end of the elastic sealing block, which is far away from the elastic sealing base plate, is of a conical structure, the elastic sealing block can conveniently enter the air inlet, the elastic sealing base plate is enabled to be in closer contact with the port of the air inlet through the pressing assembly, the tightness of the elastic sealing base plate to the air inlet is improved, the heat insulation cotton is fixed on the outer side of the mounting shell, the heat dissipation of the air in the mounting shell is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a schematic view of the structure of the guide rail of the present invention;
FIG. 4 is an enlarged view of area A of FIG. 2;
FIG. 5 is an enlarged view of area B of FIG. 2;
FIG. 6 is an enlarged view of area C of FIG. 2;
FIG. 7 is an enlarged view of area D of FIG. 3;
fig. 8 is an enlarged view of the region E in fig. 4.
In the figure: 1-inner container; 2-a shell; 3-a separator; 4-detecting the groove; 5-mounting grooves; 6-opening; 7-sealing cover; 8-a lifting device; 9-a pump body; 10-an air inlet; 11-a temperature control device; 12-a mounting housing; 13-heating the tube; 14-a blower device; 15-a temperature sensor; 16-a control panel; 17-a detection device; 18-a lift motor; 19-a fixed mount; 20-a threaded cylinder; 21-a bearing plate; 22-a threaded rod; 23-a guide rail; 24-a chute; 25-a blower motor; 26-fan blades; 27-an air pump; 28-an airway tube; 29-gas pipe; 30-a pressure chamber; 31-a barometric pressure sensor; 32-a connector; 33-a fixed flange; 34-a fixing bolt; 35-a hold down assembly; 36-elastic sealing pad; 37-an elastic sealing block; 38-a first platen; 39-a second platen; 40-compression spring; 41-heat preservation cotton; 42-attachment flange.
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. 1-8, the present invention provides a technical solution: the utility model provides a shielding centrifugal pump gas tightness testing arrangement, includes inner bag 1, casing 2 and the pump body 9, inner bag 1 is fixed on the inner wall at casing 2 top, the inside of inner bag 1 is fixed with baffle 3, baffle 3 separates the inside of inner bag 1 for detecting groove 4 and mounting groove 5, the position that casing 2 top and detection groove 4 correspond is equipped with opening 6, the top of opening 6 is equipped with sealed lid 7, one side of sealed lid 7 is through hinge and casing 2 swing joint, the opposite side of sealed lid 7 passes through the hasp and casing 2 joint, the inside of detecting groove 4 is fixed with elevating gear 8, the pump body 9 is placed on elevating gear 8's output, the one end of the pump body 9 is equipped with air inlet 10, the outside of inner bag 1 is equipped with temperature control device 11, temperature control device 11 includes installation shell 12, heating pipe 13, air blast device 14, Temperature sensor 15 and control panel 16, installation shell 12 is located the outside of inner bag 1, and the top of installation shell 12 is fixed with casing 2, air-blast device 14 is fixed on the inner wall at installation shell 12 both sides, heating pipe 13 and temperature sensor 15 are all fixed on the inner wall of installation shell 12 bottom, temperature sensor 15 electric connection control panel 16, control panel 16 electric connection heating pipe 13, control panel 16 electric connection air-blast device 14 and heating pipe 13, control panel 16 is fixed in the outside of casing 2, be fixed with detection device 17 on the inner wall of casing 2 bottom, detection device 17's output and air inlet 10 are connected.
The blower device 14 comprises a blower motor 25 and fan blades 26, the blower motor 25 is fixed on the outer side of the mounting shell 12, an output shaft of the blower motor 25 penetrates through the mounting shell 12 and is fixed with the fan blades 26, the output shaft of the blower motor 25 is rotatably connected with the mounting shell 12 through a bearing, the fan blades 26 are driven to rotate through the rotation of the blower motor 25, the air flow is generated inside the mounting shell 12 through the rotation of the fan blades 26, and therefore the temperature of the air inside the mounting shell 12 is more uniform.
Connecting piece 32 includes mounting flange 33, fixing bolt 34, compresses tightly subassembly 35, elastic sealing backing plate 36 and elastic sealing piece 37, the outside of air inlet 10 is fixed with flange 42, mounting flange 33 is fixed with flange 42 through fixing bolt 34, one side that mounting flange 33 is close to flange 42 is fixed with elastic sealing backing plate 36 through compressing tightly subassembly 35, elastic sealing piece 37 is located the inboard of air inlet 10, and elastic sealing piece 37 and the inner wall interference fit of air inlet 10, elastic sealing piece 37 is fixed with one side that elastic sealing backing plate 36 kept away from compressing tightly subassembly 35, the one end that pressure chamber 30 was kept away from to gas-supply pipe 29 is fixed with elastic sealing piece 37, and communicates with air inlet 10, and the leakproofness that makes detection device 17 and pump body 9 be connected through connecting piece 32 is stronger.
The end of the elastic sealing block 37 far away from the elastic sealing pad 36 is of a conical structure, so that the elastic sealing block 37 can enter the air inlet 10 conveniently.
Compress tightly subassembly 35 and include first clamp plate 38, second clamp plate 39 and compression spring 40, one side of first clamp plate 38 is fixed with mounting flange 33, compression spring 40 fixes between first clamp plate 38 and second clamp plate 39, second clamp plate 39 is fixed with elastic sealing backing plate 36, and it is inseparabler to make elastic sealing backing plate 36 and the contact of air inlet 10 port department through compressing tightly subassembly 35, has improved elastic sealing backing plate 36 to the leakproofness of air inlet 10.
The heat insulation cotton 41 is fixed on the outer side of the mounting shell 12, so that the loss of air heat in the mounting shell 12 is reduced, and the fluctuation degree of air temperature is reduced.
The working principle is as follows: the air tightness of the pump body 9 can be detected at constant temperature, the connection tightness between the pump body 9 and the detection device 17 is better, the error of the air tightness detection of the pump body 9 is reduced, during the detection, the rotation of the lifting motor 18 drives the thread cylinder 20 to rotate, the threaded rod 22 is movably connected to the inner side of the thread cylinder 20 through threads, the top of the threaded rod 22 is fixed with a bearing part, the rotation of the thread cylinder 20 drives the bearing plate 21 to move upwards, when the bearing plate 21 is close to the bottom of the opening 6, the lifting motor 18 stops rotating, the pump body 9 is placed on the bearing plate 21, the connecting part 32 is connected with the air inlet 10 at one end of the pump body 9, after the connection, the pump body 9 is conveyed to the inside of the detection groove 4 through the rotation of the lifting motor 18, the opening 6 is sealed through the sealing cover 7 at the moment, the air pressure in the pressure cavity 30 is increased through the air pump 27, the pressure cavity 30 is, thereby the atmospheric pressure in the pump body 9 has been increased, the atmospheric pressure in the pressure chamber 30 equals the atmospheric pressure of the pump body 9, detect the pressure variation in the pressure chamber 30 through air pressure sensor 31, realized the detection to pump body 9 gas tightness, control panel 16 control heating pipe 13 heats the air in the installation shell 12, detect the temperature of air and feed back to control panel 16 through temperature sensor 15, realized the constant temperature control to the air in the installation shell 12, the air after the heating carries out the heat exchange with the air that detects the inside of groove 4, thereby the constant temperature environment that the pump body 9 detected has been realized.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (5)
1. The utility model provides a shield centrifugal pump gas tightness testing arrangement, includes inner bag (1), casing (2) and pump body (9), its characterized in that: the inner container (1) is fixed on the inner wall of the top of the shell (2), a partition plate (3) is fixed inside the inner container (1), the partition plate (3) divides the inner part of the inner container (1) into a detection groove (4) and a mounting groove (5), an opening (6) is arranged at the top of the shell (2) and at the position corresponding to the detection groove (4), a sealing cover (7) is arranged at the top of the opening (6), one side of the sealing cover (7) is movably connected with the shell (2) through a hinge, the other side of the sealing cover (7) is connected with the shell (2) through a lock catch, a lifting device (8) is fixed inside the detection groove (4), the pump body (9) is placed on the output end of the lifting device (8), an air inlet (10) is arranged at one end of the pump body (9), a temperature control device (11) is arranged outside the inner container (1), the temperature control device (11) comprises an installation shell (12), a heating pipe (13), an air blowing device (14), a temperature sensor (15) and a control panel (16), the installation shell (12) is located on the outer side of the inner container (1), the top of the installation shell (12) is fixed with the shell (2), the air blowing device (14) is fixed on the inner walls of the two sides of the installation shell (12), the heating pipe (13) and the temperature sensor (15) are both fixed on the inner wall of the bottom of the installation shell (12), the temperature sensor (15) is electrically connected with the control panel (16), the control panel (16) is electrically connected with the heating pipe (13), the control panel (16) is electrically connected with the air blowing device (14) and the heating pipe (13), the control panel (16) is fixed on the outer side of the shell (2), and a detection device (17) is fixed on the inner wall of the bottom of the shell (2), the output end of the detection device (17) is connected with the air inlet (10);
the air blowing device (14) comprises an air blowing motor (25) and fan blades (26), the air blowing motor (25) is fixed on the outer side of the mounting shell (12), an output shaft of the air blowing motor (25) penetrates through the mounting shell (12) to be fixed with the fan blades (26), and the output shaft of the air blowing motor (25) is rotatably connected with the mounting shell (12) through a bearing;
the detection device (17) comprises an air pump (27), an air guide pipe (28), an air conveying pipe (29), a pressure cavity (30), an air pressure sensor (31) and a connecting piece (32), the air pump (27) is fixed on the inner wall of the bottom of the shell (2), the output end of the air pump (27) is connected with the pressure cavity (30) through the air guide pipe (28), the pressure cavity (30) is fixed at the bottom of the mounting groove (5), the air pressure sensor (31) is fixed on the inner wall of the bottom of the pressure cavity (30), the top of the pressure cavity (30) is fixed with the connecting piece (32) through the air conveying pipe (29), and the connecting piece (32) is connected with the air inlet (10);
the lifting device (8) comprises a lifting motor (18), a fixed frame (19), a threaded cylinder (20), a bearing plate (21) and a threaded rod (22), the bottom of the threaded cylinder (20) is rotationally connected with the fixed frame (19) through a bearing, an output shaft of the lifting motor (18) is fixed with the bottom of the threaded cylinder (20), the lifting motor (18) and the fixed mount (19) are both fixed on the inner wall of the bottom of the shell (2), the threaded cylinder (20) penetrates through the mounting shell (12) and the inner container (1), and the threaded cylinder (20) is respectively connected with the bottom of the mounting shell (12) and the inner container (1) in a rotating way through a bearing, the threaded rod (22) is movably connected to the inner side of the threaded cylinder (20) through threads, the top of the threaded rod (22) is fixed with the bearing plate (21), and the pump body (9) is placed on the bearing plate (21);
the connecting piece (32) comprises a fixing flange (33), a fixing bolt (34), a pressing component (35), an elastic sealing cushion plate (36) and an elastic sealing block (37), a connecting flange (42) is fixed on the outer side of the air inlet (10), the fixing flange (33) is fixed with the connecting flange (42) through the fixing bolt (34), one side, close to the connecting flange (42), of the fixing flange (33) is fixed with the elastic sealing cushion plate (36) through the pressing component (35), the elastic sealing block (37) is located on the inner side of the air inlet (10), the elastic sealing block (37) is in interference fit with the inner wall of the air inlet (10), the elastic sealing block (37) is fixed with the elastic sealing cushion plate (36) on the side far away from the pressing component (35), one end, far away from the pressure cavity (30), of the air pipe (29) is fixed with the elastic sealing block (37), and communicates with the gas inlet (10).
2. The airtightness testing apparatus for the shielded centrifugal pump according to claim 1, wherein: guide rails (23) are symmetrically fixed on two sides of the detection groove (4), sliding grooves (24) are formed in positions, corresponding to the guide rails (23), of the bearing plate (21), and the sliding grooves (24) are connected with the guide rails (23) in a sliding mode.
3. The airtightness testing apparatus for the shielded centrifugal pump according to claim 1, wherein: one end of the elastic sealing block (37) far away from the elastic sealing cushion plate (36) is of a conical structure.
4. The airtightness testing apparatus for the shielded centrifugal pump according to claim 3, wherein: the pressing assembly (35) comprises a first pressing plate (38), a second pressing plate (39) and a compression spring (40), one side of the first pressing plate (38) is fixed to the fixing flange (33), the compression spring (40) is fixed between the first pressing plate (38) and the second pressing plate (39), and the second pressing plate (39) is fixed to the elastic sealing base plate (36).
5. The airtightness testing apparatus for the shielded centrifugal pump according to claim 1, wherein: and heat insulation cotton (41) is fixed on the outer side of the mounting shell (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810110783.7A CN108332921B (en) | 2018-02-05 | 2018-02-05 | Shielding centrifugal pump gas tightness testing arrangement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810110783.7A CN108332921B (en) | 2018-02-05 | 2018-02-05 | Shielding centrifugal pump gas tightness testing arrangement |
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| Publication Number | Publication Date |
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| CN108332921A CN108332921A (en) | 2018-07-27 |
| CN108332921B true CN108332921B (en) | 2021-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810110783.7A Active CN108332921B (en) | 2018-02-05 | 2018-02-05 | Shielding centrifugal pump gas tightness testing arrangement |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995940A (en) * | 2006-01-20 | 2007-07-11 | 河北第二机械工业有限公司 | Sealing performance detector by using vacuum balancing method and detection method therefor |
| CN101424581A (en) * | 2007-11-02 | 2009-05-06 | 英华达（上海）科技有限公司 | Sealing test device and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005214859A (en) * | 2004-01-30 | 2005-08-11 | Jfe Steel Kk | Airtight testing apparatus for pump for liquefied gas |
| CN201051040Y (en) * | 2007-01-31 | 2008-04-23 | 丹东热工仪表有限公司 | Leakage detection device |
| CN204301945U (en) * | 2014-12-31 | 2015-04-29 | 盛瑞传动股份有限公司 | A kind of water pump air-tightness detection device |
| CN106840548A (en) * | 2017-03-31 | 2017-06-13 | 合肥智慧殿投资管理有限公司 | A kind of preservative film gas leakage simulation detection equipment |
-
2018
- 2018-02-05 CN CN201810110783.7A patent/CN108332921B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1995940A (en) * | 2006-01-20 | 2007-07-11 | 河北第二机械工业有限公司 | Sealing performance detector by using vacuum balancing method and detection method therefor |
| CN101424581A (en) * | 2007-11-02 | 2009-05-06 | 英华达（上海）科技有限公司 | Sealing test device and method thereof |
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| CN108332921A (en) | 2018-07-27 |
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