CN104596710A - Gas tightness test equipment - Google Patents

Gas tightness test equipment Download PDF

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Publication number
CN104596710A
CN104596710A CN201410848337.8A CN201410848337A CN104596710A CN 104596710 A CN104596710 A CN 104596710A CN 201410848337 A CN201410848337 A CN 201410848337A CN 104596710 A CN104596710 A CN 104596710A
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CN
China
Prior art keywords
air
test
gag
hold
airtight fixture
Prior art date
Application number
CN201410848337.8A
Other languages
Chinese (zh)
Inventor
熊家平
王战军
Original Assignee
宁波华瓷通信技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 宁波华瓷通信技术有限公司 filed Critical 宁波华瓷通信技术有限公司
Priority to CN201410848337.8A priority Critical patent/CN104596710A/en
Publication of CN104596710A publication Critical patent/CN104596710A/en

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Abstract

The invention is suitable for the field of detection equipment and provides gas tightness test equipment which comprises a rack, wherein the rack comprises a working rack and a workbench. The gas tightness test equipment is characterized in that a tester gas cylinder is arranged on the working rack, wherein a gas tightness tool is arranged on the workbench; the tester is connected with the gas tightness tool through a as tube; an opening which is matched with a contact surface of the test piece in shape is formed in the upper end surface of the gas tightness tool; a fixed base is arranged at the tail end of a piston rod of the gas cylinder; a pressing device is fixed on the fixed base; the gas tightness tool is positioned below the pressing device; the pressing device is used for pressing or loosening the test piece through extending and retracting of the piston rod. The gas tightness test equipment is used for solving the problems that the filter is long in test time in a gas tightness test process, low in test speed, low in working efficiency and cannot be suitable for gas tightness test needs of large-scale filters of enterprises.

Description

A kind of air-tightness testing device

Technical field

The invention belongs to checkout equipment field, particularly relate to a kind of air-tightness testing device.

Background technology

Along with the wave filter environment for use in field of microwave communication trends towards diversified and complicated, as in outdoor, use in the environment such as deep water, require more and more higher to the impermeability of wave filter, air tightness test must be carried out to judge whether to meet request for utilization to it with the seal that silicon rubber makes after wave filter is produced.

In prior art, one test platform is generally manufactured with to the bubble-tight test of wave filter, test platform is equipped with frock, measured piece adopts bolt to fix and after being sealed in frock, the annular seal space of frock starts air inlet, reach set pressure, and after keeping setting-up time, namely whether the drop-out value reading pressure judge that whether the impermeability of product is qualified within the range of permission.

But, sealing due to measured piece and frock is fixed employing and is manually installed set bolt, measured piece along with size difference need adapt with it in frock fix 10 ~ 30 bolts, like this in air tightness test process, after sealing fixed installation completes with test, demounting bolt all requires a great deal of time and manpower, and the test duration of this test mode is long, and test speed is slow, inefficiency, can not adapt to the air tightness test demand of enterprise's wave filter in enormous quantities.

Summary of the invention

The invention provides a kind of air-tightness testing device, it is long to be intended to solve the test duration in wave filter air tightness test process, and slowly, inefficiency, can not adapt to the problem of the air tightness test demand of enterprise's wave filter in enormous quantities to test speed.

The present invention realizes like this, a kind of air-tightness testing device is provided, comprise frame, described frame comprises falsework and worktable, it is characterized in that, described falsework is provided with tester and cylinder, described worktable is provided with airtight fixture, described tester is connected by tracheae with described airtight fixture, described airtight fixture upper surface offers the mouth closed with test block surface of contact matching form, the piston-rod end of described cylinder is configured with holder, described holder is fixed with hold down gag, described airtight fixture is positioned at below described hold down gag, described hold down gag is by the flexible compression of described piston rod or unclamp test block.

Further, described airtight fixture comprises: cavity, is rectangle, upper end open, and described worktable is fixed in lower end; O-ring seal, is arranged in the mounting groove of described cavity upper end open surrounding, contacts with described test block; Inlet suction port, is arranged at described cavity wall, and described inlet suction port connects the cavity of described airtight fixture and described tester by tracheae.

Further, described airtight fixture is fixed in the rectangular channel of described worktable by the rectangular block of described cavity lower surface.

Further, described rectangular block and described cavity lower surface are by being adhesively fixed.

Further, described hold down gag comprises: pressure support plate, and upper surface is connected with the holder of described cylinder piston rod end; At least four pressure support posts, be connected and fixed with the multiple corresponding screw of pressure support plate lower surface respectively, contact with described test block, the distribution of described pressure support post is corresponding and spaced apart with the frame shape of described airtight fixture surface of contact with described test block.

Further, described pressure support post comprises first paragraph and second segment; Described first paragraph is the screw rod of metal material, is connected by the screw of screw rod with described pressure support plate lower surface; Described second segment is the cylinder of plastic material, and cylinder one end is provided with screw, and described screw is connected with the described screw rod of described first paragraph, the rear-face contact of the other end of cylinder and described test block and described airtight fixture surface of contact.

Further, the inlet end of described cylinder is connected with source of the gas, and described inlet end is provided with hold down gag lift controil valve, and described hold down gag lift controil valve is provided with hold down gag direction switch.

Further, described tester inlet end is connected with source of the gas, and gas transmission end is connected by the cavity of tracheae with described airtight fixture.

Further, described tester comprises PLC electric control unit.

Further, described source of the gas is external gas source.

Air-tightness testing device provided by the invention, air pressure is adopted to drive the hold down gag be connected with cylinder to fix and dismantlement work to the sealing of the airtight fixture completing test block and worktable, under the cooperation of tester, automatically complete the air tightness test of test block simultaneously, make the air tightness test procedural test time of the electronic products such as wave filter short, test speed is fast, work efficiency is high, adapts to the air tightness test demand of enterprise's wave filter in enormous quantities.

Accompanying drawing explanation

Fig. 1 is the perspective view of air-tightness testing device provided by the invention;

Fig. 2 is airtight fixture exploded perspective schematic diagram in air-tightness testing device;

Fig. 3 is airtight fixture schematic perspective view in air-tightness testing device;

Fig. 4 is worktable schematic perspective view in air-tightness testing device;

Fig. 5 is hold down gag schematic perspective view in air-tightness testing device;

Fig. 6 is pressure support plate preferred embodiment schematic perspective view in air-tightness testing device;

Fig. 7 is pressure support post schematic perspective view in air-tightness testing device;

Fig. 8 is test block impaction state schematic diagram in air-tightness testing device;

Fig. 9 is air-tightness testing device test flow chart.

Embodiment

In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.

The Reference numeral of Fig. 1 to Fig. 8 is:

Frame 1, worktable 2, falsework 3, airtight fixture 4, hold down gag 5, test block 6, cylinder 7, piston rod 8, holder 9, tester 10, gas piping 11, Test Switchboard 12, admission pressure control handle 13, hold down gag direction switch 14, hold down gag lift controil valve 15, external gas source 16, square groove 21, cavity 41, O-ring seal 42, inlet suction port 43, mounting groove 44, square block 45, coordinate mouth 46, pressure support plate 51, pressure support post 52, back up pad screw 53, support column first paragraph 521, support column screw 522, support column second segment 523.

As shown in Figure 1, in the present embodiment, air-tightness testing device comprises frame 1, tester 6, frame 1 is made up of worktable 2 and falsework 3, worktable 2 is provided with airtight fixture 4, airtight fixture 4 is used for placing test block 6, falsework 3 is fixed with tester 10 and cylinder 7 by screw, cylinder 7 is positioned at the top of airtight fixture 4, piston rod 8 end of cylinder 7 is provided with holder 9, holder 9 is bolted hold down gag 5, during test, with reference to figure 5, the pressure support post 52 engaged test part 6 of hold down gag 5, sealing fixation is played with the contact site of airtight fixture 4 by the pressure compaction test block 6 of piston rod 8.

As shown in Figures 2 to 4, airtight fixture 4 is rectangular cavities, cavity 41 upper surface has the cooperation mouth 46 coordinated with test block 6, cooperation mouth 46 circumferentially offers the mounting groove 44 for installing O-ring seal 42, the sidewall of cavity 41 offers air intake opening and is provided with inlet suction port 43, and the bottom surface of airtight fixture 4 is fixed with a rectangular block 45, coordinates with the rectangular channel 21 on worktable 2 as shown in Figure 4, airtight fixture clamping is fixed on the table, prevents airtight fixture in test process from moving on the table.In the present embodiment, cavity geometry is rectangle, be appreciated that, in other embodiments of the invention, the shape of cavity can be other polygonal shape adapted with test block 6, simultaneously, rectangular block 45 and cavity 41 are independently two parts, namely rectangular block 45 is variable with the position of cavity 41, when the alteration of form of cavity 41, when needing the aligned position adjusting airtight fixture 4 and hold down gag 5, the position of adjustment rectangular block 45 and cavity 41, in the present embodiment, rectangular block 45 and cavity 41 are by being adhesively fixed, be appreciated that, in other embodiments of the invention, rectangular block 45 can be other connected mode meeting fixed function with the fixed form of cavity 41, as screw connection etc.

Rectangular block 45 coordinates fixed form with rectangular channel 21, the fixed function of airtight fixture can be met, the quick-replaceable requirement of different size airtight fixture can be met again, make air-tightness testing device can be applicable to the test request of different size test block, improve test job efficiency.Be appreciated that, in other embodiments of the invention, the fixed form of airtight fixture and worktable can for meeting other fixed form of its function needs, as screw connects, simultaneously the block of rectangular configuration and groove also can be meet other shape coordinating fixed function, as quincunx etc.

As shown in Figure 5, hold down gag 5 is made up of the pressure support plate 51 of rectangle and columniform pressure support post 52, pressure support plate 51 lower surface is provided with multiple screw 53 and is connected with multiple pressure support post 52, the distribution of pressure support post 52 on pressure support plate 51 is relevant with the contact shape of O-ring seal 42 on airtight fixture 4 to test block 6, this distribution design of pressure support post can better ensure the sealing effectiveness of airtight fixture 4 and test block 6, be appreciated that, in other embodiments of the invention, the distribution shape of pressure support post can be other shape of adaptive testing part and airtight fixture O-ring seal surface of contact, pressure support post is corresponding at least four.

Preferably, as shown in Figure 6, multiple screws 53 that pressure support plate 51 lower surface is arranged can become matrix distribution, the test block of such foundation different size and shape, corresponding multiple screw 53 Bonding pressure support column 52 can be selected in matrix screw, to adapt to the test block of different size and shape, increase work efficiency.

As shown in Figure 7, pressure support post 52 is divided into support column first paragraph 521 and support column second segment 523, support column first paragraph 521 is the cylindrical screw rod of metal, and the screw on screw rod one end and pressure support plate is connected and fixed, and the other end is connected with the support column screw 522 on support column second segment 523.In the present embodiment, support column second segment 523 material is plastics, and plastic support post can prevent test block embossing again, have cut etc. while meeting compression requirement, ensures that in test process, product external surfaces does not sustain damage.Meanwhile, in other embodiments of the invention, the diameter of support column second segment can be other diameter adapted with test block, and shape can be other shape of meeting the demands as square etc.

As shown in Figure 8, test block 6 is fastened on the cooperation mouth of airtight fixture 4, contact with O-ring seal, compress test block 6 and the back side of airtight fixture 4 surface of contact by the pressure support post 52 of hold down gag 5, make the cavity 4 of airtight fixture form a closed cavity with test block 6.In the present embodiment, test block 6 is wave filter, and in actual test, test block can have the electronic product of hermetically-sealed construction for other.

As shown in Figure 9, the testing procedure of the present embodiment is as follows:

Step S901, places test block in the airtight fixture of worktable;

In step S901, place on the airtight fixture 4 of test block 6 on worktable 2, the O-ring seal 42 on the binding face of test block 6 and airtight fixture 4 is fitted, and the test block 6 of the present embodiment is wave filter, and binding face is the flange face of wave filter.

Step S902, Manual descending hold down gag, compresses test block;

Connect external gas source 16, regulate admission pressure control handle 13, the admission pressure of external gas source is made to control within proper range, hold down gag direction switch 14 on Non-follow control hold down gag lift controil valve 15, the piston rod 8 of cylinder 7 is moved down, hold down gag 5 moves down thereupon, and makes the pressure support post 52 on hold down gag 5 compress test block 6 and the back side of airtight fixture 4 binding face, stops the piston rod 8 of cylinder 7 to move down after compressing.

Step S903, starts tester, setting test pressure and time;

Start tester 10, experimental pressure, experimental pressure drop are set, and experimental period.

Step S904, start Test Switchboard, testing tool completes test automatically;

Open Test Switchboard 12, tester 10 begins through gas piping 11, inlet suction port 43, cavity 41 air inlet to airtight fixture 4, due to the sealing function of O-ring seal 42, the pressure in cavity will increase gradually, when reaching the experimental pressure of setting, tester stops air inlet automatically, and start timing, after reaching setting-up time, tester 10 is by the pressure on pressure transducer test gas piping 11, judge pressure drop whether in allowed band, and judge that whether the impermeability of test block is qualified with this.

Step S905, manually rises hold down gag, unclamps test block, takes out test block, enters next test loop.

Test defensive position dynamic operation hold down gag direction switch 14, made hold down gag 5 increase, test block 6 is unclamped, after taking out test block 6, enter the air tightness test circulation of next test block.

A kind of air-tightness testing device provided by the invention, air pressure is adopted to drive the hold down gag be connected with cylinder to be sealingly fastened on the airtight fixture of worktable by test block, automatically the air tightness test of test block is completed under the control of the tester controlled by PLC, the electronic product air tightness test processes such as wave filter are become efficiently, quick, accurately, improve the work efficiency of unit interval build-in test, reduce the time cost of product test, adapt to the air tightness test demand of enterprise's typical products in mass production.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. an air-tightness testing device, comprise frame, described frame comprises falsework and worktable, it is characterized in that, described falsework is provided with tester and cylinder, described worktable is provided with airtight fixture, described tester is connected by tracheae with described airtight fixture, described airtight fixture upper surface offers the mouth closed with test block surface of contact matching form, the piston-rod end of described cylinder is configured with holder, described holder is fixed with hold down gag, described airtight fixture is positioned at below described hold down gag, described hold down gag is by the flexible compression of described piston rod or unclamp test block.
2. air-tightness testing device as claimed in claim 1, it is characterized in that, described airtight fixture comprises:
Cavity is rectangle, upper end open, and described worktable is fixed in lower end;
O-ring seal, is arranged in the mounting groove of described cavity upper end open surrounding, contacts with described test block;
Inlet suction port, is arranged at described cavity wall, and described inlet suction port connects the cavity of described airtight fixture and described tester by tracheae.
3. air-tightness testing device as claimed in claim 2, it is characterized in that, described airtight fixture is fixed in the rectangular channel of described worktable by the rectangular block of described cavity lower surface.
4. air-tightness testing device as claimed in claim 3, described rectangular block and described cavity lower surface are by being adhesively fixed.
5. air-tightness testing device as claimed in claim 1, it is characterized in that, described hold down gag comprises:
Pressure support plate, upper surface is connected with the holder of described cylinder piston rod end;
At least four pressure support posts, be connected and fixed with the multiple corresponding screw of pressure support plate lower surface respectively, contact with described test block, the distribution of described pressure support post is corresponding and spaced apart with the frame shape of described airtight fixture surface of contact with described test block.
6. air-tightness testing device as claimed in claim 5, it is characterized in that, described pressure support post comprises first paragraph and second segment;
Described first paragraph is the screw rod of metal material, is connected by the screw of screw rod with described pressure support plate lower surface;
Described second segment is the cylinder of plastic material, and cylinder one end is provided with screw, and described screw is connected with the described screw rod of described first paragraph, the rear-face contact of the other end of cylinder and described test block and described airtight fixture surface of contact.
7. air-tightness testing device as claimed in claim 1, it is characterized in that, the inlet end of described cylinder is connected with source of the gas, and described inlet end is provided with hold down gag lift controil valve, and described hold down gag lift controil valve is provided with hold down gag direction switch.
8. air-tightness testing device as claimed in claim 1, it is characterized in that, described tester inlet end is connected with source of the gas, and gas transmission end is connected by the cavity of tracheae with described airtight fixture.
9. air-tightness testing device as claimed in claim 1, it is characterized in that, described tester comprises PLC electric control unit.
10. as claim 7 or air-tightness testing device according to claim 8, it is characterized in that, described source of the gas is external gas source.
CN201410848337.8A 2014-12-29 2014-12-29 Gas tightness test equipment CN104596710A (en)

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CN201410848337.8A CN104596710A (en) 2014-12-29 2014-12-29 Gas tightness test equipment

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105784295A (en) * 2016-04-27 2016-07-20 摩比天线技术(深圳)有限公司 Automatic detection system and method used for detecting air tightness of radio frequency product
CN106595972A (en) * 2016-11-30 2017-04-26 芜湖立创包装有限公司 Air-tightness detection method for packaging cylinder
CN107806972A (en) * 2017-12-05 2018-03-16 郑州斯倍思机电有限公司 A kind of testboard and its operating method for crankcase air-tightness
CN107991024A (en) * 2017-11-29 2018-05-04 郑州斯倍思机电有限公司 A kind of automotive seat assembly performing leak test platform and its operating method
CN109341975A (en) * 2018-10-08 2019-02-15 苏州中晟精密制造有限公司 A kind of airtight automation equipment of test

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105784295A (en) * 2016-04-27 2016-07-20 摩比天线技术(深圳)有限公司 Automatic detection system and method used for detecting air tightness of radio frequency product
CN106595972A (en) * 2016-11-30 2017-04-26 芜湖立创包装有限公司 Air-tightness detection method for packaging cylinder
CN106595972B (en) * 2016-11-30 2019-05-31 蔡怀峰 Airtight detection method for packing tube
CN107991024A (en) * 2017-11-29 2018-05-04 郑州斯倍思机电有限公司 A kind of automotive seat assembly performing leak test platform and its operating method
CN107806972A (en) * 2017-12-05 2018-03-16 郑州斯倍思机电有限公司 A kind of testboard and its operating method for crankcase air-tightness
CN109341975A (en) * 2018-10-08 2019-02-15 苏州中晟精密制造有限公司 A kind of airtight automation equipment of test

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