CN202661236U - Air tightness test fixture and air tightness test system - Google Patents
Air tightness test fixture and air tightness test system Download PDFInfo
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- CN202661236U CN202661236U CN2012202875502U CN201220287550U CN202661236U CN 202661236 U CN202661236 U CN 202661236U CN 2012202875502 U CN2012202875502 U CN 2012202875502U CN 201220287550 U CN201220287550 U CN 201220287550U CN 202661236 U CN202661236 U CN 202661236U
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Abstract
The utility model discloses an air tightness test fixture and an air tightness test system, wherein the air tightness test system comprises a rack, the air tightness test fixture, a fixture ascending-descending mechanism, a control module, and a vacuumizing and air pressure measurement device; the air tightness test fixture is installed on the rack and comprises an upper mould and a lower mould; a cavity for accommodating a to-be-tested product is formed in the lower surface of the upper mould; the to-be-tested product is placed on the lower mould and forms an airtight cavity with the lower mould when the upper mould is tightly pressed; an air extraction hole is formed below the position for placing the to-be-tested product in the lower mould and used for extracting air from the airtight cavity to generate a negative pressure; the fixture ascending-descending mechanism is connected with the upper mould and used for descending the upper mould to tightly press the to-be-tested product and the lower mould; the vacuumizing and air pressure measurement device is connected with the air extraction hole and used for extracting air and measuring an air pressure in the airtight cavity; the vacuumizing and air pressure measurement device is connected with an air source; the control module is electrically connected with the fixture ascending-descending mechanism and the vacuumizing and air pressure measurement device and used for controlling the fixture ascending-descending mechanism to ascend and descend, and controlling the vacuumizing and air pressure measurement device to extract air and measure the air pressure in the airtight cavity.
Description
Technical field
The utility model relates to impermeability detection technique field, relates in particular to the shell making-up unit waterproofing and airtight property testing of digital product such as mobile phone etc.
Background technology
The pressure that the Water-proof air-tight detection technique of the shell making-up unit of existing digital product such as mobile phone etc. comes analog equipment to be subjected in water with internally air blowing, what this mode was blown generation internally is malleation, opposite with actual product pressurized situation, impact test effect, whether existing waterproof mobile phone shell making-up unit impermeability detection technique is observed product with the method for emitting bubble simultaneously leakage, according to the decision means of how much coming of emitting bubble whether leakage is arranged, this kind determination methods subjectivity is strong, immeasurable voltinism, easily erroneous judgement; On the other hand, existing waterproof mobile phone shell making-up unit air tightness detection equipment does not have airtight test fixture, and anchor clamps are manual operation, and testing efficiency is low; Existing waterproof mobile phone shell making-up unit air tightness detection equipment precision is low simultaneously, and measuring accuracy is 0.1InH2O scale air pressure change.
The utility model content
Technical problem to be solved in the utility model is, the deficiency for above-mentioned impermeability detection technique exists provides a kind of precision is high, efficient is high, safe and reliable air tightness test anchor clamps, system.
The technical scheme that the utility model air tightness test anchor clamps adopt is: the air tightness test anchor clamps, comprise upper die and lower die, it is characterized in that: described patrix lower surface is provided with the cavity in order to accommodating product to be tested, product to be tested places on the counterdie when patrix compresses and forms seal chamber between the product to be tested and counterdie, and described counterdie is placed product space to be tested below and is provided with aspirating hole in order to the generation negative pressure of bleeding from seal chamber.
In the such scheme, be provided with sealant between preferred described counterdie and the product to be tested, in order to guarantee that seal degree between product to be tested and the counterdie is to form seal chamber.
In the such scheme, be provided with the guiding-positioning structure that coincide with product to be tested on the preferred described counterdie, to treat the test products location, described sealant is the O-ring seal that arranges along guiding-positioning structure.
In the such scheme, the groove of the guiding-positioning structure that arranges on the preferred described counterdie for matching with product to be tested edge.
In the such scheme, the convex edge of the guiding-positioning structure that arranges on the preferred described counterdie for matching with product to be tested edge.
In the such scheme, preferred described patrix is provided with in order to the guide pillar hole that slides up and down along guide pillar, is convenient to oscilaltion under the drive of anchor clamps lift drive mechanism.
In the such scheme, be provided with the limited block that guarantees distance between counterdie and the patrix on preferred described patrix and/or the counterdie.
The technical scheme that the utility model tightness test system adopts is: tightness test system comprises frame, the air tightness test anchor clamps, jig lifting mechanism, control module, vacuumize and air pressure measuring apparatus, described air tightness test anchor clamps are installed on the frame, comprise upper die and lower die, described patrix lower surface is provided with the cavity in order to accommodating product to be tested, product to be tested places on the counterdie and form seal chamber when patrix compresses and between the counterdie, described counterdie is placed product space to be tested below and is provided with aspirating hole in order to the generation negative pressure of bleeding from seal chamber, described jig lifting mechanism is connected with patrix, compress product to be tested and counterdie in order to fall patrix, described vacuumize and air pressure measuring apparatus is connected to bleed with aspirating hole and measures the seal chamber internal gas pressure, described vacuumizing and air pressure measuring apparatus connection source of the gas, described control module and jig lifting mechanism, vacuumize and air pressure measuring apparatus is electrically connected in order to controlling the jig lifting mechanism lifting, and vacuumize and air pressure measuring apparatus is bled and measured the seal chamber internal gas pressure.
In the such scheme, be provided with sealant between preferred described counterdie and the product to be tested.
In the such scheme, be provided with the guiding-positioning structure that coincide with product to be tested on the preferred described counterdie, described sealant is the O-ring seal that arranges along guiding-positioning structure.
In the such scheme, preferred described jig lifting mechanism adopts air cylinder driven or screw mandrel drive mechanism.
In the such scheme, preferred described jig lifting mechanism adopts air cylinder driven mechanism, described jig lifting mechanism adopts air cylinder driven mechanism, described air cylinder driven mechanism connects source of the gas, comprise cylinder, solenoid valve I, described control module connected electromagnetic valve I is controlled described cylinder and is driven described patrix and move up and down.
In the such scheme, preferred described tightness test system comprises safety door, described air cylinder driven mechanism comprises safe door electromagnetic inductive switch and safety door travel switch, described safe door electromagnetic inductive switch link control module is in order to transmit safety door open and-shut mode signal, and described safety door travel switch is series between control module and the solenoid valve I in order to disconnect the air cylinder driven circuit when safety door is opened.
In the such scheme, preferred described vacuumizing and air pressure measuring apparatus connection source of the gas, described vacuumize and air pressure measuring apparatus comprises the solenoid valve II, reduction valve, vacuum generator, the vacuum precision reduction valve, the solenoid valve III, differential pressure gauge, described control module connected electromagnetic valve II, reduction valve, vacuum generator, the vacuum precision reduction valve, the solenoid valve III, differential pressure gauge, after described jig lifting mechanism is fallen patrix and is compressed product to be tested and counterdie and form seal chamber, after described control module control solenoid valve II control vacuum generator is pumped to fixed time or specified pressure from seal chamber, described control module control solenoid valve III is closed, seal chamber and differential pressure gauge form sealing, the air pressure change of differential pressure gauge test seal chamber fixed time section.
In the such scheme, preferred control module adopts Single-chip Controlling.
In the such scheme, preferred described control module comprises the time setting module, in order to setting bleed time and the rear fixed time section of bleeding.
In the such scheme, preferred described control module comprises the automatic decision module, in order to judge test result according to air pressure change.
In the such scheme, preferred described tightness test system comprises that also display lamp and hummer are in order to show the test result of automatic decision module.
In the such scheme, preferred described tightness test system also comprises cleaning mechanism, described cleaning mechanism comprises solenoid valve IV and lancing door joint, and described lancing door joint is connected with source of the gas, and described control module is connected to control lancing door joint cleaning air tightness test anchor clamps with the solenoid valve IV.
The beneficial effects of the utility model are: make the sealing test cavity of product to be tested produce negative pressure by the method that vacuumizes, the real test case of Simulation with I P67 and real water are invaded environment from the outside; Such as the logic control of further use single-chip microcomputer and high-accuracy differential pressure gauge product is revealed and to be analyzed and judge, can accurately test out the tiny leakage of 0.01InH2O scale air pressure change; Further, judge for making things convenient for test result, two sections set of times are adopted in test stopwatch and system's control, and remind by hummer and display lamp; Air tightness test parts and sealing clamp are supported by the aluminium alloy extrusions frame and fix, be designed to single equipment, unifiedly carry out system's control by singlechip control panel; For guaranteeing that sealed environment is clean and reducing mistake and survey, avoid dust to affect the air locking sealing, also can increase and adopt the automatic or manual cleaning function, for guaranteeing equipment operating safety, also can duplicate protection be set at safety door.During the Water-proof air-tight that the utility model can be widely used in the assembly of various digital products and small household electrical appliance and parts detects.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the utility model perspective view one;
Fig. 2 is the utility model perspective view two;
Fig. 3 is the utility model profile front elevation;
Fig. 4 is the utility model profile left view;
Fig. 5 is the utility model profile right view;
Fig. 6 is the utility model air tightness test clamp structure schematic diagram;
Fig. 7 is local enlarged diagram among Fig. 6;
Fig. 8 is the structural representation of the another kind of embodiment of the utility model air tightness test anchor clamps;
Fig. 9 is the utility model pneumatic control schematic diagram;
Figure 10 is the utility model circuit control line graph
Figure 11 is the utility model test process logic control chart.
Embodiment
In order to make those skilled in the art understand better the technical solution of the utility model, below in conjunction with accompanying drawing, the utility model is described in further detail, such as Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5, the utility model tightness test system comprises frame 1, frame 1 comprises support mould bases 2 and the equipment outside framework assembly 3 that the 80X80MM section bar is made, control module 4 is installed in the equipment outside framework assembly 3, air tightness test anchor clamps 5 are assemblied in and support on the mould bases 2 stopwatch 19, automatic test result display lamp 20, automatic test buzzer 21, device drives alarm buzzer 22, safety door mechanical trip switch 23, safety door 24, cleaning switch 25, safe door electromagnetic inductive switch 26, operating switch 27 is located on the equipment outside framework assembly 3.
Such as Fig. 6, shown in Figure 7, air tightness test anchor clamps 5 comprise patrix 33 and counterdie 37, patrix 33 lower surfaces are provided with the cavity in order to accommodating product 32 to be tested, patrix 33 also is provided with the guide pillar hole that slides up and down in order to along support mould bases 2 upper guide posts, be provided with the profiling fitting surface structure 38 of coincideing with product to be tested 32 on the counterdie 37 as guiding-positioning structure, profiling fitting surface structure 38 is the convex edge of matching with product to be tested 32 edges, another side structure and the seal compression of assembling are the same mutually in final assembly with product 32 to be tested, along being provided with O-ring seal 34 on the profiling fitting surface structure 38, product to be tested places on the O-ring seal 34 when patrix 33 compresses and forms seal chamber 36 between the product to be tested and counterdie 37, is that seal chamber 36 bottoms are provided with aspirating hole 35 in order to the formation negative pressure of bleeding from seal chamber 36 below counterdie 37 placements product space to be tested.Different products can be tested by changing different air tightness test anchor clamps, guiding-positioning structure also can have different forms simultaneously, be illustrated in figure 8 as the another kind of embodiment of air tightness test anchor clamps, wherein, profiling fitting surface structure is the groove that matches with product to be tested edge.
Be illustrated in figure 9 as the pneumatic control schematic diagram of tightness test system, Figure 10 is the circuit control line graph of tightness test system, control module 4 adopts Single-chip Controlling, system is connected with oil sprayer and connects source of the gas by filtering dropping valve, jig lifting mechanism adopts air cylinder driven mechanism, air cylinder driven mechanism comprises double-acting cylinder 9, solenoid valve I, and the solenoid valve I is pilot solenoid valve 8, and control module 4 connects pilot solenoid valve 8 control double-acting cylinders 9 drive patrixes 33 and moves up and down.
Vacuumize and air pressure measuring apparatus connection source of the gas, vacuumize and air pressure measuring apparatus comprises solenoid valve II (five-way pilot solenoid valve) 10, precise pressure-reducing valve 11, vacuum generator 12, vacuum precision reduction valve 13, solenoid valve III (two-way straight-through electromagnetic valve) 14, differential pressure gauge EXTECH HD700 15, mechanical valve 16, control module 4 connected electromagnetic valve II (five-way pilot solenoid valve) 10, precise pressure-reducing valve 11, vacuum generator 12, vacuum precision reduction valve 13, solenoid valve III (two-way straight-through electromagnetic valve) 14, differential pressure gauge (model is EXTECH HD700) 15, mechanical valve 16, mechanical valve 16 is in order to judge when closing whether test tracheae pipeline and parts leak gas, carry out air pressure by differential pressure gauge 15 and leak the variation test, the test tracheae is connected to the negative pressure input interface of differential pressure gauge 15, differential pressure gauge 15 another input interfaces are unsettled, this table scale precision is 0.01InH2O unit, use the differential pressure pattern, test in InH2O unit, can accurately test out the tiny leakage of product, usually to leak leakage rate less than 0.02InH2O/ second as the qualification determination standard.
Equipment outside framework assembly 3 also is equipped with safety door 24; safety door 24 adopts two protection structures; air cylinder driven mechanism comprises safe door electromagnetic inductive switch 26 and safety door travel switch 23; safe door electromagnetic inductive switch 26 link control modules 4 are in order to transmit safety door 24 open and-shut mode signals; safety door travel switch 23 is series between control module 4 and the pilot solenoid valve 8 in order to disconnect the air cylinder driven circuit when safety door 24 is opened; only have like this when safety door 24 closes; safe door electromagnetic inductive switch 26 and safety door travel switch 23 are all connected; cylinder ability downlink working; whenever needing only safety door 24 does not shut; double-acting cylinder 9 can't be descending; as long as safety door 24 is opened; double-acting cylinder 9 is up return immediately; because safety door travel switch 23 is connected in air cylinder driven pilot solenoid valve 8 control circuits, guaranteed the reliability of device security operation.
Tightness test system also comprises cleaning mechanism, cleaning mechanism can adopt automatic or manual control, cleaning mechanism comprises solenoid valve IV 17 and lancing door joint 18, lancing door joint 18 is connected with source of the gas, and control module 4 is connected with solenoid valve IV 17, behind patrix 33 returns, can press cleaning switch 25, solenoid valve 17 work, 18 ventilations of lancing door joint avoid dust to affect the air locking sealing from anchor clamps top aeration cleaning anchor clamps.
The air tightness test process is as follows:
1. at first, product 32 to be tested is positioned on the tightness test system air tightness test lower clamping fixture 37; The safety door 24 that closes presses the operation button 27, pilot solenoid valve 8 work, and device drives alarm buzzer 22 provides prompting simultaneously, and it is descending that double-acting cylinder 9 drives patrixes 33, compresses formation seal chamber 36 between product 32 to be tested and the counterdie 37;
2. after the air tightness test anchor clamps closed, cylinder stroke switch 28 was connected, under control module 4 controls, as shown in figure 11, stopwatch 19 beginning timing, solenoid valve 10 is started working, and vacuum generator 12 begins to bleed by aspirating hole 35 and forms negative pressure to 3 seconds fixed times at seal chamber 36;
Two-way through type battery valve 14 was closed when 3. stopwatch 19 showed 3 seconds, and seal chamber 36 forms sealing with differential pressure gauge 15, and stopwatch 19 restarts timing, and differential pressure gauge 15 is by the air pressure change of aspirating hole 35 test 36 fixed time of seal chamber sections; The automatic decision module of control module 4, judge test result according to air pressure change, if 20 seconds any time in seal chamber 36 air pressure leakage rate of change less than setting value 0.02InH2O/ second product to be tested can be accepted as qualified, otherwise can not accept, for defective, test result is by automatic test result display lamp 20, automatically test buzzer 21 is sounded or light shows;
4. behind patrix 33 returns, press cleaning switch 25, solenoid valve 17 work, 18 ventilations of lancing door joint are from the next product to be tested of anchor clamps top aeration cleaning anchor clamps setup test.
Above embodiment has been described in detail the utility model, but these are not to consist of restriction of the present utility model.Protection domain of the present utility model is not limited with above-mentioned embodiment, as long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection domain of putting down in writing in claims.
Claims (19)
1. air tightness test anchor clamps, comprise upper die and lower die, it is characterized in that: described patrix lower surface is provided with the cavity in order to accommodating product to be tested, product to be tested places on the counterdie when patrix compresses and forms seal chamber between the product to be tested and counterdie, and described counterdie is placed product space to be tested below and is provided with aspirating hole in order to the generation negative pressure of bleeding from seal chamber.
2. air tightness test anchor clamps as claimed in claim 1 is characterized in that: be provided with sealant between described counterdie and the product to be tested.
3. air tightness test anchor clamps as claimed in claim 2, it is characterized in that: be provided with the guiding-positioning structure that coincide with product to be tested on the described counterdie, described sealant be the O-ring seal along the guiding-positioning structure setting.
4. air tightness test anchor clamps as claimed in claim 3 is characterized in that: the groove of the guiding-positioning structure that arranges on the described counterdie for matching with product to be tested edge.
5. air tightness test anchor clamps as claimed in claim 3 is characterized in that: the convex edge of the guiding-positioning structure that arranges on the described counterdie for matching with product to be tested edge.
6. such as air tightness test anchor clamps as described in the arbitrary claim of claim 1 to 5, it is characterized in that: described patrix is provided with the guide pillar hole in order to slide up and down along guide pillar.
7. air tightness test anchor clamps as claimed in claim 6 is characterized in that: be provided with the limited block that guarantees distance between counterdie and the patrix on described patrix and/or the counterdie.
8. tightness test system, it is characterized in that: described tightness test system comprises frame, the air tightness test anchor clamps, jig lifting mechanism, control module, vacuumize and air pressure measuring apparatus, described air tightness test anchor clamps are installed on the frame, comprise upper die and lower die, described patrix lower surface arranges the cavity in order to accommodating product to be tested, product to be tested places on the counterdie and form seal chamber when patrix compresses and between the counterdie, described counterdie is placed product space to be tested below and is provided with aspirating hole in order to the generation negative pressure of bleeding from seal chamber, described jig lifting mechanism is connected with patrix, compress product to be tested and counterdie in order to fall patrix, described vacuumize and air pressure measuring apparatus is connected to bleed with aspirating hole and measures the seal chamber internal gas pressure, described vacuumizing and air pressure measuring apparatus connection source of the gas, described control module and jig lifting mechanism, vacuumize and air pressure measuring apparatus is electrically connected in order to controlling the jig lifting mechanism lifting, and vacuumize and air pressure measuring apparatus is bled and measured the seal chamber internal gas pressure.
9. tightness test system as claimed in claim 8 is characterized in that: be provided with sealant between described counterdie and the product to be tested.
10. tightness test system as claimed in claim 9, it is characterized in that: be provided with the guiding-positioning structure that coincide with product to be tested on the described counterdie, described sealant be the O-ring seal along the guiding-positioning structure setting.
11. tightness test system is characterized in that: described jig lifting mechanism employing air cylinder driven or screw mandrel drive mechanism as claimed in claim 10.
12. tightness test system as claimed in claim 11, it is characterized in that: described jig lifting mechanism adopts air cylinder driven mechanism, described air cylinder driven mechanism connects source of the gas, comprise cylinder, solenoid valve I, described control module connected electromagnetic valve I is controlled described cylinder and is driven described patrix and move up and down.
13. tightness test system as claimed in claim 12, it is characterized in that: described tightness test system comprises safety door, described air cylinder driven mechanism comprises safe door electromagnetic inductive switch and safety door travel switch, described safe door electromagnetic inductive switch link control module is in order to transmit safety door open and-shut mode signal, and described safety door travel switch is series between control module and the solenoid valve I in order to disconnect the air cylinder driven circuit when safety door is opened.
14. such as tightness test system as described in the arbitrary claim of claim 8 to 13, it is characterized in that: described vacuumizing and air pressure measuring apparatus connection source of the gas, described vacuumize and air pressure measuring apparatus comprises the solenoid valve II, reduction valve, vacuum generator, the vacuum precision reduction valve, the solenoid valve III, differential pressure gauge, described control module connected electromagnetic valve II, reduction valve, vacuum generator, the vacuum precision reduction valve, the solenoid valve III, differential pressure gauge, after described jig lifting mechanism is fallen patrix and is compressed product to be tested and counterdie and form seal chamber, after described control module control solenoid valve II control vacuum generator is pumped to fixed time or specified pressure from seal chamber, described control module control solenoid valve III is closed, seal chamber and differential pressure gauge form sealing, the air pressure change after the differential pressure gauge test seal chamber fixed time section.
15. tightness test system is characterized in that: described control module employing Single-chip Controlling as claimed in claim 14.
16. tightness test system as claimed in claim 15, it is characterized in that: described control module comprises the time setting module, in order to setting bleed time and the rear fixed time section of bleeding.
17. tightness test system as claimed in claim 15, it is characterized in that: described control module comprises the automatic decision module, in order to judge test result according to air pressure change.
18. tightness test system as claimed in claim 15, it is characterized in that: described tightness test system comprises that also display lamp and hummer are in order to show the test result of automatic decision module.
19. tightness test system as claimed in claim 15, it is characterized in that: described tightness test system also comprises cleaning mechanism, described cleaning mechanism comprises solenoid valve IV and lancing door joint, described lancing door joint is connected with source of the gas, and described control module is connected to control lancing door joint cleaning air tightness test anchor clamps with the solenoid valve IV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202875502U CN202661236U (en) | 2012-06-19 | 2012-06-19 | Air tightness test fixture and air tightness test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202875502U CN202661236U (en) | 2012-06-19 | 2012-06-19 | Air tightness test fixture and air tightness test system |
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| CN202661236U true CN202661236U (en) | 2013-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012202875502U Expired - Fee Related CN202661236U (en) | 2012-06-19 | 2012-06-19 | Air tightness test fixture and air tightness test system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749179A (en) * | 2012-06-19 | 2012-10-24 | 赛龙通信技术（深圳）有限公司 | Clamp, system and method for testing air tightness |
| CN103728084A (en) * | 2013-05-28 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | Upper probe and lower probe detection system with position capable of being calibrated accurately and calibration method thereof |
| TWI486569B (en) * | 2013-06-10 | 2015-06-01 | Pegatron Corp | Airtight testing equipment and airtight testing method |
| CN107042380A (en) * | 2017-04-11 | 2017-08-15 | 广东南海昌和模具有限公司 | A kind of upper and lower mould for special bent pipe presses welding fixture |
| CN109141772A (en) * | 2018-07-02 | 2019-01-04 | 宝鸡文理学院 | The detection device and method of lamps and lanterns dustproof and waterproof |
| CN109799178A (en) * | 2019-03-08 | 2019-05-24 | 济南兰光机电技术有限公司 | A kind of sample automated exchanged cutter structure and gas permeation test system |
| CN110805834A (en) * | 2019-10-15 | 2020-02-18 | 北京安达维尔航空设备有限公司 | Two-section vacuum power and water pressure power air tightness testing device |
-
2012
- 2012-06-19 CN CN2012202875502U patent/CN202661236U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749179A (en) * | 2012-06-19 | 2012-10-24 | 赛龙通信技术（深圳）有限公司 | Clamp, system and method for testing air tightness |
| CN103728084A (en) * | 2013-05-28 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | Upper probe and lower probe detection system with position capable of being calibrated accurately and calibration method thereof |
| TWI486569B (en) * | 2013-06-10 | 2015-06-01 | Pegatron Corp | Airtight testing equipment and airtight testing method |
| CN107042380A (en) * | 2017-04-11 | 2017-08-15 | 广东南海昌和模具有限公司 | A kind of upper and lower mould for special bent pipe presses welding fixture |
| CN109141772A (en) * | 2018-07-02 | 2019-01-04 | 宝鸡文理学院 | The detection device and method of lamps and lanterns dustproof and waterproof |
| CN109799178A (en) * | 2019-03-08 | 2019-05-24 | 济南兰光机电技术有限公司 | A kind of sample automated exchanged cutter structure and gas permeation test system |
| CN110805834A (en) * | 2019-10-15 | 2020-02-18 | 北京安达维尔航空设备有限公司 | Two-section vacuum power and water pressure power air tightness testing device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20150619 |
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| EXPY | Termination of patent right or utility model |