CN207379683U - Auto pump assembly air-tightness leakage test mechanism - Google Patents
Auto pump assembly air-tightness leakage test mechanism Download PDFInfo
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- CN207379683U CN207379683U CN201721111215.6U CN201721111215U CN207379683U CN 207379683 U CN207379683 U CN 207379683U CN 201721111215 U CN201721111215 U CN 201721111215U CN 207379683 U CN207379683 U CN 207379683U
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- leak test
- workpiece
- fixed frame
- pump assembly
- rack
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Abstract
The utility model provides a kind of auto pump assembly air-tightness leakage test mechanism, belongs to parts detection technique field.The utility model includes the workpiece fixing component being arranged in rack and leak test component, the workpiece fixing component includes the fixed frame that can be moved back and forth along vertical direction, rotation leak test motor is equipped on fixed frame, leak test component includes being arranged on the leak test platform for being used to place workpiece to be detected in rack, the leak test platform is equipped with to place the leak test chamber of workpiece to be detected, rack is equipped with leak test instrument and compressed air generator, and leak test instrument and compressed air generator are respectively communicated with leak test chamber.The utility model has many advantages, such as that dynamic detection result is accurate.
Description
Technical field
The utility model belongs to parts detection technique field, is related to a kind of air-tightness leakage tester, more particularly, to one kind
Auto pump assembly air-tightness leakage test mechanism.
Background technology
As the important component in automobile engine, it pressurizes water pump for coolant, ensures coolant in a cooling system
It circulates.The leakproofness of water pump is very big on the suction performance influence of water pump, is directly related to the cooling effect of engine.
Water pump complement air-tightness leakage tester is the special equipment for detecting each junction air-tightness after water pump complement assembles.
At present, each producer is that performance checking, but water pump real use state are sealed to water pump using static mode
It is rotation, static test cannot really react the sealing performance of pump working state, and inspection result is inaccurate, it is impossible to true
Reaction water pump quality state.
Utility model content
The purpose of this utility model is regarding to the issue above and defect, to provide a kind of auto pump assembly air-tightness leakage tester
Structure.
In order to achieve the above objectives, the utility model employs following technical proposal：
A kind of auto pump assembly air-tightness leakage test mechanism, including workpiece fixing component and the leak test structure being arranged in rack
Part, the workpiece fixing component include the fixed frame that can be moved back and forth along vertical direction, and rotation leak test is equipped on fixed frame
Motor, the output shaft of rotation leak test motor, which is connected with to be inserted into workpiece, to be formed mating leak test with workpiece and grabs, described
Leak test component include being arranged in rack to place the leak test platform of workpiece to be detected, the leak test platform is equipped with and is used for
The leak test chamber of workpiece to be detected is placed, rack is equipped with leak test instrument and compressed air generator, leak test instrument and compressed air hair
Raw device is respectively communicated with leak test chamber.
In above-mentioned auto pump assembly air-tightness leakage test mechanism, rack, which is equipped with, has what can axially be moved back and forth
The lift actuator of output shaft, lift actuator Connection Bracket is so as to drive fixed frame vertically to move back and forth, institute
The leak test stated, which is grabbed, to be arranged on fixed frame and is rotatablely connected with fixed frame, and the compressed air generator includes being arranged on rack
On compressed air cylinder.
In above-mentioned auto pump assembly air-tightness leakage test mechanism, the upper surface rotation connection fixture group of the leak test platform
Part, the clamp assembly can rotate Workpiece clamping or the release that will be placed in leak test chamber, institute along with the junction of leak test platform
One is additionally provided on the fixed frame stated for detecting the glitch detection component of workpiece surface bounce.
In above-mentioned auto pump assembly air-tightness leakage test mechanism, the clamp assembly includes being rotatably connected on leak test platform
On fixture block, fixture block has several and a circumferentially spaced uniform setting, and rotation leak test motor connects torquemeter by belt pulley,
Torquemeter connection leak test is grabbed.
In above-mentioned auto pump assembly air-tightness leakage test mechanism, the one end of the torquemeter away from belt pulley is connected with
Bearing block, bearing block is interior to be equipped with rotation axis, jig plate is fixedly connected on fixed frame, glitch detection component is arranged on jig plate
On.
In above-mentioned auto pump assembly air-tightness leakage test mechanism, the glitch detection component includes being fixed on jig plate
On bounce stent, glacing flatness stent is equipped with dial gauge, and the probe of dial gauge grabs towards leak test.
In above-mentioned auto pump assembly air-tightness leakage test mechanism, the leak test packet capturing includes what is be fixedly connected with the rotating shaft
Seat is grabbed, at least one positioning that can be inserted into workpiece is fixed on seat is grabbed and is grabbed, it is described when positioning, which is grabbed, to be inserted into workpiece
The probe of dial gauge be located exactly on the upper surface of workpiece.
In above-mentioned auto pump assembly air-tightness leakage test mechanism, the positioning grabs that there are two and along grab the axial line of seat
It is symmetrical arranged, the fixed frame includes the supporting rack being fixedly connected with the output shaft of lift actuator, and supporting rack bottom is equipped with
Guide plate, rack are equipped with the lead being inserted into guide plate, and rotation leak test motor is fixedly mounted on supporting rack.
In above-mentioned auto pump assembly air-tightness leakage test mechanism, the fixed frame and leak test platform are solid equipped with that can control
Determine the limit assembly of frame movement lower limit.
In above-mentioned auto pump assembly air-tightness leakage test mechanism, the limit assembly includes being arranged on leak test platform
Several lower limit bars and several upper limit bars being arranged on fixed frame, the upper limit bar are a pair of with lower limit bar one
It should.
Compared with prior art, the utility model advantage is：
1st, auto pump assembly air-tightness leakage test mechanism described in the utility model by fixed water pump, and passes through rotation
Leak test motor achievees the purpose that dynamic detection so that the water pump in detection process is in rotary state, and test result is accurate；
2nd, using air leakage detector, measured compared to direct water flowing, it is more convenient；
3rd, measure air-tightness when measure bounce and torque etc. simultaneously, can for water pump other performance parameters into
Row measures, and efficiency is higher.
4th, this equipment has certain versatility, and similar workpiece is can also after component by replacing corresponding fix to clamp
It uses.
Part is illustrated to embody by the further advantage, target and feature of the utility model by following, and part will also pass through
Research and practice to the utility model and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 be the utility model proposes embodiment front view；
Fig. 2 be the utility model proposes embodiment side view；
Fig. 3 be the utility model proposes embodiment front view during the inspection process；
Fig. 4 is the structure diagram of water pump to be detected in the utility model；
Fig. 5 is structure diagram when clamp assembly unclamps in the present embodiment；
Fig. 6 is structure diagram when clamp assembly clamps in the present embodiment；
Fig. 7 is the top view after leak test platform installation workpiece for measurement in the present embodiment.
In figure, rack 1, workpiece fixing component 2, leak test component 3, fixed frame 4, rotation leak test motor 5, leak test grabs 6, leak test
Platform 7, leak test chamber 8, leak test instrument 9, compressed air generator 10, lift actuator 11, compressed air cylinder 12, clamp assembly 13 are jumped
Dynamic detection components 14, fixture block 15, belt pulley 16, torquemeter 17, bearing block 18, rotation axis 19, jig plate 20, stent 21 of beating,
Dial gauge 22, grabs seat 23, and positioning grabs 24, supporting rack 25, guide plate 26, lead 27, lower limit bar 28, upper limit bar 29；
Workpiece 100 to be detected, the shaft 101 of workpiece to be detected, 701 marking device 702 of workpiece locating piece, tracheae of hunting leak
703。
Specific embodiment
The detection workpiece that the present embodiment uses is as shown in figure 5, for a kind of auto pump, equipped with shaft 101.
As Fig. 1-3 shows a kind of embodiment of the utility model, a kind of auto pump assembly air-tightness leakage test mechanism, bag
The workpiece fixing component 2 being arranged in rack 1 and leak test component 3 are included, the workpiece fixing component 2 includes can be along vertical direction
The fixed frame 4 of reciprocating movement, is equipped with rotation leak test motor 5 on fixed frame 4, and the output shaft of rotation leak test motor 5 is connected with energy
It is inserted into workpiece and mating leak test is formed with workpiece grabs 6, the leak test component 3 includes being arranged in rack 1 being used for
The leak test platform 7 of workpiece to be detected is placed, the leak test platform 7 is equipped with to place the leak test chamber 8 of workpiece to be detected, machine
Frame 1 is equipped with leak test instrument 9 and compressed air generator 10, and leak test instrument 9 and compressed air generator 10 are respectively communicated with leak test chamber 8.
Using this scheme, by workpiece to be detected, i.e. water pump is placed in the leak test chamber 8 of leak test platform 7, and is fixed on examination
It leaks on platform 7, the height that leak test grabs 6 declines, and is supported just with workpiece to be detected, workpiece to be detected at this time is fixed on leak test platform
7, and start to test, leak test motor 5 is rotated in test process and is started, and leak test is driven to grab 6 rotations, leak test grab 6 with it is to be detected
Workpiece is fixedly connected, and the shaft 101 of workpiece to be detected is driven to rotate, and simulates water pump normal rotation, at this point, compressed air is sent out
Compressed air is passed through leak test chamber 8 by raw device 10, and leak test instrument 9 judges whether air-tightness is good according to the variation of air pressure.Also, this
Kind mode is a kind of explanation of preferred embodiments, but is not limited thereto.
It will be appreciated by those skilled in the art that sealing mechanism should be equipped between workpiece to be detected and leak test chamber 8 so that treat
The workpiece of detection is air tight between leak test chamber 8 in detection process, ensures the accuracy of detection.
In this implementation, test the component of torque and bounce and the component of driving rotation is all fixed on fixed frame 4, and with
Fixed frame 4 is moved back and forth along vertical direction.Fixed frame 4 includes lift actuator 11,11 Connection Bracket 4 of lift actuator
So as to which fixed frame 4 is driven vertically to move back and forth, the lift actuator 11 in the present embodiment selects cylinder, passes through cylinder
The length change of piston rod drive the reciprocal lifting of fixed frame 4, cylinder is fixed on the top of rack 1, the work that cylinder stretches out
Stopper rod is fixedly connected with the top of fixed frame 4, is fixedly connected with mode and is connected for dismountable fastener, is such as bolted, is convenient for
It safeguards and installs.This mode is a kind of explanation of preferred embodiments, but is not limited thereto.When implementing the utility model,
The activation configuration of fixed frame oscilaltion can be controlled according to user's demand sprocket wheel, belt etc..
Fixed frame 4 further includes the supporting rack 25 being fixedly connected with the output shaft of lift actuator 11, and rack 1 is equipped with vertical
Lead 27,25 bottom of supporting rack are equipped with horizontal guide plate 26, and guide plate 26 is through lead 27 and logical with lead 27
It crosses linear bearing to be attached, reduces resistance, reduce the load of lift actuator 11.
And fixed frame 4 and leak test platform 7 are equipped with the limit assembly that fixed frame 4 can be controlled to move lower limit, including being arranged on
Several lower limit bars 28 on leak test platform 7 and several upper limit bars 29 being arranged on fixed frame 4, the upper limit bar
29 correspond with lower limit bar 28.Upper limit bar 29 is vertically arranged with lower limit bar 28, and the position between two end faces
Difference is equal to leak test and grabs 6 to the potential difference between workpiece to be detected so that leak test, which is grabbed 6 and can be supported with workpiece to be detected, to be connected.
The upper surface rotation connection clamp assembly 13 of leak test platform 7, the clamp assembly 13 can be along the junctions with leak test platform 7
Workpiece clamping or the release that be placed in leak test chamber 8 are rotated, for workpiece to be detected to be fixed on leak test platform 7,
It prevents from loosening during the test, with reference to Fig. 7, the clamp assembly 13 includes the fixture block 15 being rotatably connected on leak test platform 7,
Fixture block 15 has several and circumferentially spaced uniform setting, and leak test platform 7 also sets up multiple workpiece locating pieces, contribute to by
Workpiece is placed into appropriate position.
Fig. 5,6 respectively illustrate state when clamp assembly 13 is clamped and unclamped in the present embodiment, and clamp assembly 13 includes
For the structure that the fixture block 15 and control fixture block 15 that are fixed lift, control lifting structure includes elevating lever and connecting rod, connecting rod
One end with clamp assembly 13 is rotatable is fixedly connected, the other end of connecting rod and the centre of fixture block 15 it is rotatable it is fixed even
Connect, the one end of fixture block 15 away from Devices to test with the top of elevating lever is rotatable is fixedly connected.When elevating lever rises, fixture block
15 around link rotatable and are pressed on workpiece to be measured, are at this time clamped condition.When elevating lever declines, fixture block 15 turns around connecting rod
It moves and leaves on workpiece to be measured, be at this time release.Elevating lever in the present embodiment is connected using cylinder, and is controlled automatically
System reduces the workload of worker, and it is homogeneous to exert a force, and contributes in detection process to keep the stabilization of workpiece to be detected.It is this
Mode is a kind of explanation of preferred embodiments, but is not limited thereto.It, can be according to user's need when implementing the utility model
Seek the realization method for clamping and unclamping using other modes driving fixture block 15 and change fixture block 15.
Leak test is grabbed 6 from upper decline and is pressed on workpiece 100 to be detected, and leak test is grabbed 6 and is arranged on fixed frame 4 and with turning
Moving axis 19 is fixedly connected, and transmission carrys out the kinetic energy of spinning leak test motor 5, and the shaft 101 of workpiece to be detected is driven to rotate, and simulates work
Water pump state when making.Leak test, which grabs 6, to be included grabbing seat 23 and positioning grabs 24, wherein grabbing seat 23 connects rotation axis 19, positioning grab 24 with
It is inserted into workpiece and links with the shaft 101 of workpiece to be detected.Positioning is grabbed there are two 24 and symmetrical along the axial line for grabbing seat 23
It sets.
Leak test is grabbed 6 detachable with fixed frame 4 in the present embodiment, and leak test platform 7 is detachable with rack 1, when testing different water
It, can be with the leak test platform 7 that is adjusted to that the leak test of the water pump is suitble to grab 6 and leak test chamber 8 during pump.Therefore this equipment has certain lead to
With property, similar products by replace it is corresponding fix to clamp component after can also use.
Air-leakage test component：Compressed air generator 10 described in the present embodiment includes the pressure being arranged in rack 1
Contracting air tank 12 is provided the compressed air of detection by compressed air cylinder 12.It will be appreciated by those skilled in the art that the present embodiment
Middle compressed air generator 10 should be further included by air cleaner, pressure reducing valve, cylinder, solenoid valve, muffler, pipeline and its attached
Part etc..With reference to shown in Fig. 7, leak detection tracheae 703 is passed into the lower section of workpiece 100, and ventilates from centre.
Torque detection part：It rotates leak test motor 5 and torquemeter 17 is connected by belt pulley 16, torquemeter 17 is away from belt pulley
16 one end is connected with bearing block 18, and rotation axis 19 is equipped in bearing block 18, and rotation axis 19 connects leak test and grabs 6.When leak test grabs 6 bands
When moving the rotation of shaft 10 of workpiece to be detected and held stationary, torque is measured.
Glitch detection component：One is additionally provided on fixed frame 4 for detecting the glitch detection component 14 of workpiece surface bounce,
Jig plate 20 is fixedly connected on fixed frame 4, glitch detection component 14 is arranged on jig plate 20.The glitch detection component
14 include the bounce stent 21 being fixed on jig plate 20, and bounce stent 21 is equipped with dial gauge 22, the probe court of dial gauge 22
6 are grabbed to leak test.When positioning, which is grabbed, to be inserted into workpiece, the probe of the dial gauge 22 is located exactly on the upper surface of workpiece.
Marked part：Marking device 702 is equipped on leak test platform 7, when air-tightness etc. detects it is qualified after, to workpiece into rower
Note.
The workflow of this implementation：The necessary adjustment of equipment is carried out first so that equipment is engaged with workpiece, will be to be checked
The workpiece of survey is placed into corresponding position by hand, starting device, at this point, 15 Automatic-clamping of fixture block of clamp assembly 13, by workpiece
It is fixed, and carry out necessary closure, it is ensured that air-leakage test it is closed, fixed frame 4 declines, and the positioning that leak test grabs 6 is grabbed and is inserted into
Workpiece, rotation leak test motor 5 start, and the shaft 101 of workpiece to be detected is driven to rotate, simulates operating mode during work, at this time accordingly
Component air-tightness, the detection of torque and bounce are carried out to workpiece, if test result meets the requirements, pass through marking device 702
Qualification is marked to workpiece, terminates to examine at this time, clamp assembly 13 and fixed frame 4 automatically reset, and workpiece is taken out.
Leakage tester airtightness measurement principle in the present embodiment：Workpiece to be detected and leak test chamber 8 are tightly connected, leak test instrument
9 and compressed air generator 10 be respectively communicated with leak test chamber 8, be passed through compressed air in leak test chamber 8.It is drawn according to physics research
" state equation of perfect gas " of " perfect gas " state change rule, i.e.,：PV/T=R, P is gas pressure in formula, and V is
The volume of gas, T are the temperature of gas, and R is gas universal constant, i.e., to the blanket constant of all gas, this side
Journey shows in the case of constant temperature, and 20s is generally higher than after the regular hour, and the cavity volume of leakage tester does not become
Change, and if cavity pressure has dropped one and determines value △ P, can determine that the workpiece " having leakage ".Due to air have it is compressible
Property, and viscosity is relatively low, it means that 100~400 times faster than liquid by the speed of leak source of air.Air is substantially without table
Face tension, this feature make it than liquid more easily by small leak source.However, air can by leakage, to liquid
Speech not necessarily leaks.Therefore the maximum allowable air leakage rate of leakage tester, workpiece leakage value then think the work when being less than the value
Part " No leakage " is known as certified products.Just think " unqualified " or " serious leak " when only workpiece leakage value is more than the value.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Described specific embodiment can be done various modifications or additions or using similar by belonging to those skilled in the art
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although herein more using rack 1, workpiece fixing component 2, leak test component 3, fixed frame 4, rotation leak test motor
5, leak test grabs 6, leak test platform 7, leak test chamber 8, leak test instrument 9, compressed air generator 10, lift actuator 11, compressed air cylinder 12,
Compressed air cylinder 12, clamp assembly 13, glitch detection component 14, fixture block 15, belt pulley 16, torquemeter 17, bearing block 18 rotate
Axis 19,20 grade terms of jig plate, but it does not preclude the possibility of using other terms.The use of these items is only for more
Easily describe and explain the essence of the utility model；It is all new with this practicality to be construed as any one of the additional limitations
Type spirit is disagreed.
Claims (10)
1. a kind of auto pump assembly air-tightness leakage test mechanism, including workpiece fixing component (2) and the examination being arranged in rack (1)
Leak component (3), which is characterized in that the workpiece fixing component (2) includes the fixed frame that can be moved back and forth along vertical direction
(4), rotation leak test motor (5) is equipped on fixed frame (4), the output shaft of rotation leak test motor (5), which is connected with, can be inserted into work
Mating leak test is formed with workpiece grab (6) in part,
The leak test component (3) is included being arranged on for placing the leak test platform (7) of workpiece to be detected in rack (1), described
Leak test platform (7) be equipped with to place the leak test chamber (8) of workpiece to be detected, rack (1) is equipped with leak test instrument (9) and compression
Air generator (10), leak test instrument (9) and compressed air generator (10) are respectively communicated with leak test chamber (8).
2. auto pump assembly air-tightness leakage test mechanism according to claim 1, which is characterized in that rack (1) is equipped with
Lift actuator (11) with the output shaft that can axially move back and forth, lift actuator (11) Connection Bracket (4) from
And fixed frame (4) can be driven vertically to move back and forth, the leak test grab (6) be arranged on fixed frame (4) and with fixation
Frame (4) is rotatablely connected, and the compressed air generator (10) includes the compressed air cylinder (12) being arranged in rack (1).
3. auto pump assembly air-tightness leakage test mechanism according to claim 2, which is characterized in that the leak test platform
(7) upper surface rotation connection clamp assembly (13), the compressed air cylinder (12) can along and leak test platform (7) junction rotate from
And the Workpiece clamping in leak test chamber (8) or release will be placed on, one is additionally provided on the fixed frame (4) for detecting workpiece
The glitch detection component (14) of surface run_out.
4. auto pump assembly air-tightness leakage test mechanism according to claim 3, which is characterized in that the clamp assembly
(13) include being rotatably connected on fixture block (15) on leak test platform (7), fixture block (15) there are several and circumferentially spaced uniformly sets
It puts, rotation leak test motor (5) connects torquemeter (17) by belt pulley (16), and torquemeter (17) connection leak test is grabbed (6).
5. auto pump assembly air-tightness leakage test mechanism according to claim 4, which is characterized in that the torquemeter
(17) one end away from belt pulley (16) is connected with bearing block (18), rotation axis (19) is equipped in bearing block (18), in fixed frame
(4) jig plate (20) is fixedly connected on, glitch detection component (14) is arranged on jig plate (20).
6. auto pump assembly air-tightness leakage test mechanism according to claim 5, which is characterized in that the glitch detection
Component (14) includes being fixed on bounce stent (21) on jig plate (20), and bounce stent (21) is equipped with dial gauge (22), and hundred
The probe of table (22) is divided to be grabbed (6) towards leak test.
7. auto pump assembly air-tightness leakage test mechanism according to claim 6, which is characterized in that the leak test is grabbed
(6) include being fixedly connected with rotation axis (19) grabs seat (23), and being fixed on seat (23) is grabbed at least one can be inserted into workpiece
In positioning grab (24), when positioning, which is grabbed, to be inserted into workpiece, the probe of the dial gauge (22) is located exactly at the upper of workpiece
On surface.
8. auto pump assembly air-tightness leakage test mechanism according to claim 7, which is characterized in that the positioning is grabbed
(24) it is symmetrical arranged there are two and along the axial line for grabbing seat (23), the fixed frame (4) includes and lift actuator (11)
The supporting rack (25) that output shaft is fixedly connected, supporting rack (25) bottom are equipped with guide plate (26), and rack (1) is equipped with to be inserted into and lead
Lead (27) into plate (26), rotation leak test motor (5) are fixedly mounted on supporting rack (25).
9. auto pump assembly air-tightness leakage test mechanism according to claim 1, which is characterized in that the fixed frame
(4) and leak test platform (7) is equipped with the limit assembly that can control the mobile lower limit of fixed frame (4).
10. auto pump assembly air-tightness leakage test mechanism according to claim 9, which is characterized in that the /V group
Part includes several lower limit bars (28) being arranged on leak test platform (7) and several upper limit bars being arranged on fixed frame (4)
(29), the upper limit bar (29) is corresponded with lower limit bar (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721111215.6U CN207379683U (en) | 2017-08-31 | 2017-08-31 | Auto pump assembly air-tightness leakage test mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721111215.6U CN207379683U (en) | 2017-08-31 | 2017-08-31 | Auto pump assembly air-tightness leakage test mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207379683U true CN207379683U (en) | 2018-05-18 |
Family
ID=62343260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721111215.6U Expired - Fee Related CN207379683U (en) | 2017-08-31 | 2017-08-31 | Auto pump assembly air-tightness leakage test mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207379683U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108787493A (en) * | 2018-08-01 | 2018-11-13 | 福州鸿基自动化设备有限公司 | Four station workpiece air leak testers |
| CN109520674A (en) * | 2018-12-04 | 2019-03-26 | 盛瑞传动股份有限公司 | A kind of multifunctional water pump air tightness test-bed |
-
2017
- 2017-08-31 CN CN201721111215.6U patent/CN207379683U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108787493A (en) * | 2018-08-01 | 2018-11-13 | 福州鸿基自动化设备有限公司 | Four station workpiece air leak testers |
| CN108787493B (en) * | 2018-08-01 | 2023-10-31 | 福州鸿基自动化设备有限公司 | Four-station workpiece leak detector |
| CN109520674A (en) * | 2018-12-04 | 2019-03-26 | 盛瑞传动股份有限公司 | A kind of multifunctional water pump air tightness test-bed |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180518 Termination date: 20210831 |