CN106441721A - Device and system used for testing sealing performance of filtering element - Google Patents

Device and system used for testing sealing performance of filtering element Download PDF

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Publication number
CN106441721A
CN106441721A CN201610940873.XA CN201610940873A CN106441721A CN 106441721 A CN106441721 A CN 106441721A CN 201610940873 A CN201610940873 A CN 201610940873A CN 106441721 A CN106441721 A CN 106441721A
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China
Prior art keywords
filter element
hold assembly
sealing property
testing
connecting shaft
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CN201610940873.XA
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Chinese (zh)
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CN106441721B (en
Inventor
宋岱峰
韩亮
邱迪
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Chengdu Meifute Environmental Protection Industry Co ltd
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CHENGDU MFT MEMBRANE TECHNOLOGY Co Ltd
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Priority to CN201610940873.XA priority Critical patent/CN106441721B/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00Investigating fluid-tightness of structures
    • G01M3/02Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/06Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

The invention discloses a device and a system used for testing the sealing performance of a filtering element. The device comprises a clamping structure, a connecting structure and an air inlet structure, and is characterized in that the clamping structure comprises a first clamping component and a second clamping component, the first clamping component is provided with a first side sealing body, and the second clamping component is provided with a second side sealing body; the connecting structure is used for connecting the first clamping component and the second clamping component so as to enable the first side sealing body and the second side sealing body to oppositely clamp two side edges of a through hole of a tested filtering element; and the air inlet structure comprises an air path which guides the test air into the through hole of the tested filtering element in a non-leakage mode through the first clamping component or/and the second clamping component. The device and the system disclosed by the invention can check relevant performance of the filtering element before the filtering element is assembled into a filtering assembly, and various problems existing in a circumstance that sealing performing testing can only be performed on the filtering assembly are avoided.

Description

For testing the apparatus and system of filter element sealing property
Technical field
The present invention relates to a kind of apparatus and system for testing filter element sealing property.
Background technology
Applicant of the present invention have developed a kind of filter element for water process, and the profile of this filter element is lamellar, There is a through hole at center.As shown in Figure 3,4, the concrete structure of this filter element include the first filtration membrane 420 with first filter thin The second filtration membrane 430 that film 420 is oppositely arranged and by the first filtration membrane 420 and the second filtration membrane 430 be stacked shape Become the cavity 440 between the first filtration membrane 420 and the second filtration membrane 430, this cavity 440 is thin by running through the first filtration Described through hole 410 between film 420 and the second filtration membrane 430 is communicated with the outside of filter element;Additionally, in cavity 440 It is additionally provided with the gripper shoe 450 being stacked and placed between the first filtration membrane 420 and the second filtration membrane 430 and be located at the first filtration First supporting network of thin film 420 inner side and the second supporting network being located at the second filtration membrane 430 inner side, described through hole 410 is same Run through this gripper shoe 450, the first supporting network and the second supporting network.Above-mentioned filter element be on the first filtration membrane 420 successively After stacking the first supporting network, gripper shoe 450, the second supporting network and the second filtration membrane 430, then by the first filtration membrane 420 The edge hot-working fusion of edge and the second filtration membrane 430 is made, in hot procedure the edge of the first supporting network with And second supporting network edge also together combine in crator.Above-mentioned filter element has good inner support, and supports Net also has certain water conservancy diversion effect.
However, also do not find at present a kind of can be to the edge and second of the first filtration membrane 420 of above-mentioned filter element Filter element therefore can only be assembled into by the device that the sealing after the edge hot-working fusion of filtration membrane 430 is tested The sealing of this filter assemblies of re-test after filter assemblies.When testing the sealing of filter assemblies, such as find to reveal, not only not It is easily found the concrete filter element occurring and revealing, and also need to filter assemblies are entered after finding the filter element occurring to reveal Row is dismantled, is replaced new filter element and assemble again and tested.
Content of the invention
The technical problem to be solved is to provide a kind of device for testing filter element sealing property And system, above-mentioned filter element and its similar filter element can be carried out with the test of sealing property." similar filter element " Refer to that profile is lamellar the filter element with through hole.
Device for testing filter element sealing property provided by the present invention, including:Clamp structure, described clamping knot Structure includes the first hold assembly and the second hold assembly, and described first hold assembly has the first edge seal, and described second Hold assembly has the second edge seal;Attachment structure, described attachment structure is used for connecting the first hold assembly and the second folder Hold part and make the two of the first edge seal through hole of clamping tested filter element relative with the second edge seal Lateral edges;And air intake structure, described air intake structure includes by the first hold assembly or/and the second hold assembly testing Gas imports the gas circuit in the through hole of tested filter element in the way of not revealing.
Provided by the present invention for testing the system of filter element sealing property, including above-mentioned close for testing filter element The test gas that the device of sealing property is connected with the air intake structure in the described device for testing filter element sealing property supplies Air pressure that device of air is connected with this feeder detection adjusting means and can placing is used for testing filter element described in being mounted with The test liquid bath of the tested filter element of the device of sealing property.
The above-mentioned apparatus and system for testing filter element sealing property of the present invention, its operation principle is as follows:First Tested filter element is installed to the device for testing filter element sealing property, under the fastening of attachment structure, makes folder Hold the first hold assembly of structure and the second hold assembly clamps the both sides of tested filter element, at this moment, the first edge is close The both sides of the edge of the relative through hole clamping tested filter element of Feng Tiyu the second edge seal;Described use will be mounted with Tested filter element in the device of test filter element sealing property is put under the liquid level of test liquid bath, then passes through to survey Gas testing body feeder injects test gas to air intake structure, and detects the pressure to test gas for the adjusting means using air pressure It is controlled, the pressure of test gas sets according to the filtering material of tested filter element, and this pressure should not make test It is larger that gas can set under conditions of passing through filtering material as far as possible;In test process, whether observe on tested filter element There is bubble to produce, if having, showing that testing gas reveals on filter element, the sealing existing problems of corresponding site.Can See, the above-mentioned apparatus and system for testing filter element sealing property can be to described filter element in background technology and its class As filter element carry out the test of sealing property, therefore can filter element be assembled into filter assemblies before i.e. to crossing filtering element The correlated performance of part is verified, it is to avoid filter assemblies can only be carried out with existing problems during sealing property test.
Below in conjunction with the drawings and specific embodiments, the present invention is described further.The aspect that the present invention adds and Advantage will be set forth in part in the description, and partly will become apparent from the description below, or by the practice of the present invention Recognize.
Brief description
Fig. 1 is used for for the present invention testing a kind of structural representation of the device of filter element sealing property.
Fig. 2 is used for for the present invention testing the structural representation of the system of filter element sealing property.
A kind of structural representation of filter element that Fig. 3 introduces for background technology.
Fig. 4 be 3 in A-A to sectional view.
Specific embodiment
As shown in figure 1, a kind of device for testing filter element sealing property of the present invention, including:Clamp structure 100, described clamp structure 100 includes the first hold assembly 110 and the second hold assembly 120, and described first hold assembly 110 has There is the first edge seal 111, described second hold assembly 120 has the second edge seal 121;Attachment structure 200, described Attachment structure 200 is used for connecting the first hold assembly 110 and the second hold assembly 120 and makes the first edge seal 111 and the What two edge seals 121 were relative clamps the both sides of the edge of the through hole 410 of tested filter element 400;And air intake structure 300, described air intake structure 300 include testing by the first hold assembly 110 or/and the second hold assembly 120 gas with The mode do not revealed imports the gas circuit 310 in the through hole 410 of tested filter element 400.Tested filter element 400 is installed During to the above-mentioned device for testing filter element sealing property, under the fastening of attachment structure 200, make clamp structure 100 First hold assembly 110 and the second hold assembly 120 clamp the both sides of tested filter element 400, and at this moment, the first edge is close The both sides of the edge of envelope body 111 through hole 410 that clamp tested filter element 400 relative with the second edge seal 121, from And pass through the first edge seal 111 and the second edge seal 121 guarantees the first hold assembly 110 and tested filter element 400 contact surfaces and the sealing of the second edge seal 121 and tested filter element 400 contact surface.Above-mentioned " the side not revealed It is tested that formula " refers to that test gas is imported from the first hold assembly 110 or/and the second hold assembly 120 by air intake structure 300 Do not reveal during the through hole 410 of filter element 400, thus ensureing that the pressure testing gas to set enters through hole 410 and then enter in the cavity of tested filter element 400.
As shown in Fig. 2 for the system testing filter element sealing property, including close for testing filter element with above-mentioned The air pressure inspection that the test gas feeder 1 that air intake structure 300 in the device of sealing property connects is connected with this feeder 1 Survey adjusting means 2 and the tested filter element being mounted with the described device for testing filter element sealing property can be placed 400 test liquid bath 3.In this embodiment, test gas feeder 1 employs air compressor, and air pressure detects Adjusting means 2 then include barometer on the compressed air piping connecting between air compressor and air intake structure 300 and Pressure regulator valve, the side wall of test liquid bath 3 adopts transparent material, and test fluid therein is clear water.During the work of this system, first will be mounted with The tested filter element 400 of the above-mentioned device for testing filter element sealing property is put under the liquid level of test liquid bath 3, Then pass through to test gas feeder 1 to air intake structure 300 injection test gas, and detect adjusting means 2 using air pressure The pressure of test gas is controlled, the pressure of test gas sets according to the filtering material of tested filter element 400, It is larger that this pressure can set under conditions of test gas should not be made to pass through filtering material as far as possible, in test process, observes quilt Whether there is bubble to produce on test filter element 400, if having, showing that testing gas reveals on filter element 400, phase The sealing answering position has problems.
Embodiment 1
As shown in figure 1, the device for testing filter element sealing property of embodiment 1, its clamp structure 100 includes One hold assembly 110 and the second hold assembly 120, described first hold assembly 110 has the first edge seal 111, described Second hold assembly 120 has the second edge seal 121, and described first hold assembly 110 and the second hold assembly 120 are respectively It is provided with the annular groove for disposing the first edge seal 111 and the second edge seal 121, the first edge seal 111 It is respectively adopted the sealing ring with corresponding annular groove adaptation with the second edge seal 121.Its attachment structure 200 includes connecting Axle 210 and axial fastener 220, connecting shaft 210 passes through described through hole 410 and respectively in the both sides of tested filter element 400 Connect the first hold assembly 110 and the second hold assembly 120, described axial fastener 220 makes the first hold assembly 110 and second Produce between hold assembly 120 to tested filter element 400 along connecting shaft 210 axial direction chucking power.Specifically, described company One end of spindle 210 passes through the first hold assembly 110 connect locking nut, this locking nut and connecting shaft 210 threaded adapter Connect;The other end of connecting shaft 210 passes through the second hold assembly 120 connect locking nut, this locking nut same be connected Axle 210 threaded adapter connects.Additionally, this connecting shaft 210 also also serves as described air intake structure 300, described gas circuit 310 is arranged on this In connecting shaft 210.By tested filter element 400 be installed to embodiment 1 be used for test the device of filter element sealing property When, first connecting shaft 210 is passed through the through hole 410 of tested filter element 400, be then respectively charged at the two ends of connecting shaft 210 First hold assembly 110 and the second hold assembly 120, then it is respectively charged into locking nut at the two ends of connecting shaft 210, so, the One hold assembly 110 and the second hold assembly 120 are just produced to tested mistake by the locking nut positioned at connecting shaft 210 two ends Filtering element 400 is along the chucking power of connecting shaft 210 axial direction.
Embodiment 2
As shown in figure 1, the device for testing filter element sealing property of embodiment 2 changes on the basis of embodiment 1 Enter attachment structure 200.Specifically, in example 2, described connecting shaft 210 and the second hold assembly 120 are integrated knot Structure, and this connecting shaft 210 and the first hold assembly 110 are still detachable axis hole fit structure, described axial fastener 220 is (i.e. Locking nut with connecting shaft 210 threaded adapter) it is arranged at the first hold assembly 110 side.Additionally, the first hold assembly 110 Sealing ring 111 is additionally provided with the mating surface and connecting shaft 210 between.Because connecting shaft 210 is integrated with the second hold assembly 120 Structure, tested filter element 400 is installed to when being used for the device testing filter element sealing property of embodiment 2, first will The through hole 410 of test filter element 400 is inserted in connecting shaft 210, is then inserted in the first hold assembly again in connecting shaft 210 successively 110 and axial fastener 220, the first hold assembly 110 and the second hold assembly 120 can be made after tightening axial fastener 220 Between produce to tested filter element 400 along connecting shaft 210 axial direction chucking power.Obviously, embodiment 2 for test filter The device of component seal performance can be simpler with structure for the device testing filter element sealing property compared to embodiment 1 And can faster carry out the installation and removal of tested filter element 400.
Embodiment 3
As shown in figure 1, the device for testing filter element sealing property of embodiment 3 changes on the basis of embodiment 2 Enter air intake structure 300.Specifically, in embodiment 3, described connecting shaft 210 is set to tubular structure, and its side wall is provided with Air inlet 211 with the conducting of described through hole 410.Because connecting shaft 210 is structure as a whole with the second hold assembly 120, therefore connect The one end being connected with the second hold assembly 120 in spindle 210 is blind end.For the ease of air inlet, with described envelope in connecting shaft 210 The relative one end of closed end is opening, and this opening is additionally provided with the joint 212 for being connected with test gas feeder.
Embodiment 4
As shown in figure 1, the device for testing filter element sealing property of embodiment 4 changes on the basis of embodiment 2 Enter attachment structure 200.Specifically, in example 4, a portion of the first hold assembly 110 and connecting shaft 210 spiral shell Stricture of vagina adaptation is so that the first hold assembly 110 doubles as axial fastener 220.Thus further reduce for testing filtering element The component part of the device of part sealing property, can faster carry out tested filter element 400 while simplifying structure Installation and removal.
Embodiment 5
The device for testing filter element sealing property of embodiment 5, on the basis of embodiment 2, increased and connecting The quantity of the tested filter element 400 that can simultaneously install on axle 210.Specifically, embodiment 5 for testing filter element In the device of sealing property, the first hold assembly 110 has at least two (preferably 3~6), and each first hold assembly 110 Upper and lower ends are equipped with edge seal, so, the relative clamping of the edge seal between the first adjacent hold assembly 110 Live the both sides of the edge of the through hole 410 of corresponding tested filter element 400.Embodiment 5 for testing filter element sealing The device of energy can test at least two filter elements simultaneously.

Claims (10)

1. it is used for testing the device of filter element sealing property it is characterised in that including:
Clamp structure (100), described clamp structure (100) includes the first hold assembly (110) and the second hold assembly (120), Described first hold assembly (110) has the first edge seal (111), and described second hold assembly (120) has the second side Portion's seal (121);
Attachment structure (200), described attachment structure (200) is used for connecting the first hold assembly (110) and the second hold assembly (120) make the first edge seal (111) relative with the second edge seal (121) clamp tested filter element (400) both sides of the edge of through hole (410);And
Air intake structure (300), described air intake structure (300) is included by the first hold assembly (110) or/and the second hold assembly (120) test gas is imported the gas circuit in the through hole (410) of tested filter element (400) in the way of not revealing (310).
2. the as claimed in claim 1 device being used for testing filter element sealing property it is characterised in that:Described attachment structure (200) connecting shaft (210) and axial fastener (220) are included, described connecting shaft (210) passes through described through hole (410) difference Connect the first hold assembly (110) and the second hold assembly (120), described axial direction in the both sides of tested filter element (400) Securing member (220) makes to produce to tested filter element between the first hold assembly (110) and the second hold assembly (120) (400) along the chucking power of connecting shaft (210) axial direction.
3. the as claimed in claim 2 device being used for testing filter element sealing property it is characterised in that:Described axially fasten Part (220) is using the locking nut being connected with connecting shaft (210) threaded adapter.
4. the as claimed in claim 2 device being used for testing filter element sealing property it is characterised in that:Described connecting shaft (210) with the second hold assembly (120) be structure as a whole and with the first hold assembly (110) be detachable axis hole fit structure, Described axial fastener (220) is arranged at the first hold assembly (110) side.
5. the as claimed in claim 4 device being used for testing filter element sealing property it is characterised in that:First hold assembly (110) mating surface and connecting shaft (210) between is provided with sealing ring (111).
6. the device for testing filter element sealing property as described in any one claim in claim 2 to 5, its It is characterised by:Described first hold assembly (110) and the second hold assembly (120) are respectively provided with arrangement the first edge sealing Body (111) and the annular groove of the second edge seal (121).
7. the device for testing filter element sealing property as described in any one claim in claim 2 to 5, its It is characterised by:Described connecting shaft (210) also serves as described air intake structure (300), then described gas circuit (310) is arranged on this connecting shaft (210) in.
8. the as claimed in claim 7 device being used for testing filter element sealing property it is characterised in that:Described connecting shaft (210) it is tubular structure, its side wall is provided with the air inlet (211) turning on described through hole (410).
9. the as claimed in claim 8 device being used for testing filter element sealing property it is characterised in that:Connecting shaft (210) One end be provided with for the test joint (212) that is connected of gas feeder.
10. be used for test filter element sealing property system it is characterised in that:Weigh including any one in claim 1 to 9 Profit requires the described device for testing filter element sealing property and the described dress for testing filter element sealing property The air pressure detection that test gas feeder (1) that air intake structure (300) in putting connects is connected with this feeder (1) is adjusted Regulating device (2) and can placing is mounted with the tested filter element of the described device for testing filter element sealing property (400) test liquid bath (3).
CN201610940873.XA 2016-11-01 2016-11-01 Device and system for testing sealing performance of filter element Active CN106441721B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29713637U1 (en) * 1997-07-31 1997-09-25 Enviro-Chemie Abwassertechnik Gmbh, 64380 Rossdorf Device for checking and preserving a membrane stack
JP2001021436A (en) * 1999-07-08 2001-01-26 Sony Corp Leakage inspecting device and method
CN203688161U (en) * 2013-12-12 2014-07-02 北京碧水源膜科技有限公司 Air tightness detecting device for upper end cover of column type film element
CN204301933U (en) * 2014-11-14 2015-04-29 北京碧水源膜科技有限公司 Araeosystyle film film pipe and upper end cover detect bubble-tight system simultaneously
CN205102983U (en) * 2015-10-29 2016-03-23 苏州创佳电子材料有限公司 A waterproof testing arrangement for membrane
CN206496871U (en) * 2016-11-01 2017-09-15 成都美富特膜科技有限公司 Apparatus and system for testing filter element sealing property

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29713637U1 (en) * 1997-07-31 1997-09-25 Enviro-Chemie Abwassertechnik Gmbh, 64380 Rossdorf Device for checking and preserving a membrane stack
JP2001021436A (en) * 1999-07-08 2001-01-26 Sony Corp Leakage inspecting device and method
CN203688161U (en) * 2013-12-12 2014-07-02 北京碧水源膜科技有限公司 Air tightness detecting device for upper end cover of column type film element
CN204301933U (en) * 2014-11-14 2015-04-29 北京碧水源膜科技有限公司 Araeosystyle film film pipe and upper end cover detect bubble-tight system simultaneously
CN205102983U (en) * 2015-10-29 2016-03-23 苏州创佳电子材料有限公司 A waterproof testing arrangement for membrane
CN206496871U (en) * 2016-11-01 2017-09-15 成都美富特膜科技有限公司 Apparatus and system for testing filter element sealing property

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
夏纪真: "《无损检测导论》", 31 August 2016 *

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