CN102175405B - A kind of method for testing tightness of float switch - Google Patents
A kind of method for testing tightness of float switch Download PDFInfo
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- CN102175405B CN102175405B CN201110031513.5A CN201110031513A CN102175405B CN 102175405 B CN102175405 B CN 102175405B CN 201110031513 A CN201110031513 A CN 201110031513A CN 102175405 B CN102175405 B CN 102175405B
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- sealing
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- housing
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- float switch
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Abstract
The invention provides the method for testing tightness of a kind of float switch, comprise the following steps: part or all of float switch is inserted in water container 11, and is enclosed within hermetic container 10；The internal pressure being regulated float switch housing by regulation sealing test instrument forms malleation, the pressure initiation negative pressure outside adjustment housings, thus causes external and internal pressure poor；By seeing whether gas leakage under pressure differential, the sealing between test float ball switch device casing peripheral sealing, sealing, wire inner sealing, casing neck and cable, sealing fluid between wire and housing respectively.The method of testing of the sealing fluid present invention in the case of not destroying float switch product ontology, can accurately test the sealing property of product；And it is capable of the performing leak test under certain external and internal pressure difference.The method of testing of the present invention is simple to operate, without destructive, accuracy is high, low cost, and efficiency is high, to improving float switch manufacturing process, increasing product reliability and have important function.
Description
Technical field
The present invention relates to float switch manufacturing technology, particularly relate to the method for testing tightness of a kind of float switch.
Background technology
Float switch changes for induction level, and then send the signal of telecommunication control for system by cable, it is a kind of simple in construction, Liquid level components and parts easy to use, it is widely used in the aspects such as the Level Detection of various household electrical appliances, humidifier, spray drawing machine, armarium, medical machinery and fluid reservoir, the signal is far passed, switch alarm, could be applicable to use in the liquid of various poisonous, band acid and alkali corrosions.
The structure of float switch generally comprises the housing of a closing, and housing is generally welded by two hemisphere plastic hot melt, thus has weld portion at casing peripheral；Shell one end has neck opening, and cable accesses enclosure interior from the opening of cervical region, and the sensor circuit built-in with housing is connected；When cable accesses housing, it usually needs outer by the insulation displacement with internal core by cable, expose the conductor copper wire of inside；The joint portion perfusion sealing fluid of the backward casing neck of cable access, by the outer space between quilt and copper wire of sealing fluid seal casinghousing cervical region and cable, it is achieved fully sealing of float switch cavity.
Owing to float switch long-term work is under liquid environment, its sealing determines the quality of float switch performance.But, in actual production process, inside the housing weld portion of float switch and housing and the joint portion of cable, cable, often may be in conjunction with the tightest at sealing fluid sealing, or bond strength is not enough, space, mutually stripping, breakage quickly occur after causing coming into operation, outside dampness or liquid flow into cable and float switch enclosure interior along space, cause fault to damage.Therefore, it is necessary to above-mentioned position to be carried out when dispatching from the factory the detection in terms of sealing.
But, in existing float switch manufacturing process, still lacking effective sealing propertytest means, the most existing detection technique can not detect the bond strength of above-mentioned binding site, therefore it cannot be guaranteed that float switch sealing meets actual operation requirements.
Summary of the invention
For the problems referred to above of the prior art, the invention provides the method for testing tightness of a kind of float switch, the method is poor by the inside and outside formation certain pressure at float switch housing, observes float switch housing perimeter and the sealing of joint portion under certain pressure difference.
The method for testing tightness that the present invention provides comprises the following steps: part or all and partial cables line of float switch is inserted in water container 11, and is enclosed within hermetic container 10；The internal pressure formation malleation of float switch housing and cable is regulated by regulation sealing test instrument, or adjustment housings and the outside negative pressure of the pressure initiation outside cable, or the mode that employing malleation is combined with negative pressure simultaneously, thus cause external and internal pressure poor, carry out sealing test；Under the principle of pressure differential, see whether that bubble produces, respectively the sealing between test float ball switch device casing peripheral sealing, sealing, wire inner sealing, casing neck and cable, sealing fluid between wire and housing.Sealing fluid sealing fluid
Preferably, described tightness testing method includes that malleation test is tested with negative pressure.
Preferably, described negative pressure test predominantly two kinds of method of testings of A, B, described malleation test predominantly tri-kinds of method of testings of C, D, E.
Preferably, described negative pressure method of testing A is predominantly, to be fully recessed in water 1 by joint 6, housing weld 8 outside ball float housing 2, inside conductor 4, casing neck, sealing fluid, cable, and in hermetic container 10, add the negative pressure of default certain value, whole float switch housing parts is made to be in negative pressure or vacuum state, whether detect and observe is had continuous air bubbles to emerge by joint 6, housing weld 8, conductor copper wire 9 outside ball float housing 2, casing neck, sealing fluid, cable, if not having continuous air bubbles, this sealing test is qualified.If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
Preferably, described negative pressure method of testing B is predominantly, by ball float housing 2, inside conductor 4, plug or binding post 5, casing neck, sealing fluid, cable is outer by joint 6, housing weld 8 is fully recessed in water 1, and in hermetic container 10, add the negative pressure of default certain value, whole float switch housing parts is made to be in negative pressure or vacuum state, detect and observe ball float housing 2, inside conductor 4, plug or binding post 5, casing neck, sealing fluid, cable is outer by joint 6, cable is outer by 7, housing weld 8, whether conductor copper wire 9 position has continuous air bubbles to emerge, if nothing, this sealing test is qualified.If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
Preferably, described malleation method of testing C is predominantly, to be inserted in water 1 by joint 6, housing weld 8 outside ball float housing 2, inside conductor 4, casing neck, sealing fluid, cable, and to inside conductor 4, the outer normal pressure air pressure being added default certain value by 7 of cable, product is made to be in malleation or high pressure conditions, detect and observe ball float housing 2, sealing fluid 3, inside conductor 4, casing neck, sealing fluid, cable outer by joint 6, cable outer by 7, housing weld 8, conductor copper wire 9 whether have continuous air bubbles to emerge, if nothing, this sealing test is qualified.If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
Preferably, described malleation method of testing D is predominantly, first by ball float housing 2 by analysing or the method such as jewel hole makes ball float housing 2 and water 1 infiltration the most in advance, the two ends of inside conductor 4(4 are exposed independent from the water surface), cable is outer is added the malleation presetting certain values by 7, product is made to be in malleation or high pressure conditions, whether sealing fluid 3, inside conductor 4, casing neck, sealing fluid, cable outside by joint 6, conductor copper wire 9 had continuous air bubbles emerge, if nothing, this sealing test is qualified if observing.If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
Preferably, described method of testing E, first by ball float housing 2 by analysing or the method such as jewel hole makes ball float housing 2 and water 1 infiltration the most in advance, is surfaced in one end of inside conductor 4(4, one end is immersed in the water), cable is outer is added the malleation presetting certain values by 7, product is made to be in malleation or high pressure conditions, observe sealing fluid 3, inside conductor 4, casing neck, sealing fluid, cable outer by joint 6, cable outer by 7, conductor copper wire 9 whether have continuous air bubbles to emerge, if nothing, this sealing test is qualified.If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
The method of testing of the present invention in the case of not destroying float switch product ontology, can accurately test the sealing property of product；And it is capable of the performing leak test under certain external and internal pressure difference.The method of testing of the present invention is simple to operate, without destructive, accuracy is high, low cost, and efficiency is high, to improving float switch manufacturing process, increasing product reliability and have important function.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the float switch performing leak test of the embodiment of the present invention
Detailed description of the invention
By describing the technology contents of the present invention, structural feature in detail, being realized purpose and effect, below in conjunction with detailed description of the invention and coordinate accompanying drawing to be explained in detail.
For float switch, it is that gap, mutually stripping, damaged position easily in use occur at joint portion, cable inside and casing neck sealing fluid sealing between the weld of its casing peripheral, each parts, needs the most in testing the seal degree with upper bit is detected.Sealing inside float switch casing peripheral weld, cable and housing joint portion, cable and between casing neck and cable and sealing fluid i.e. for upper bit, is detected by method for testing tightness of the present invention respectively.
The present invention method for testing tightness to float switch is introduced below in conjunction with Fig. 1.In Fig. 1,1, water 2, ball float housing 3, sealing fluid 4, inside conductor 5, plug or binding post 6, casing neck, sealing fluid, cable outer by joint 7, cable outer by 8, housing weld 9, conductor copper wire 10, hermetic container 11 water container.
In described method for testing tightness, first, part or all of float switch is inserted in water container 11, and is enclosed within hermetic container 10；Then interiors of products pressure initiation malleation is regulated by regulation sealing test instrument, regulation product external pressure forms negative pressure, or adjustment housings and the outside negative pressure of the pressure initiation outside cable, or use the mode that malleation is combined with negative pressure simultaneously, thus cause external and internal pressure poor；Afterwards, by observing whether float switch exists gas leak phenomenon, test float switch housing weld, cable and housing joint portion, cable inside and sealing fluid seal the sealing between position.
First, float switch is tested by negative pressure method of testing A, to be fully recessed in 1 by joint 6, housing weld 8 outside ball float housing 2, inside conductor 4, casing neck, sealing fluid, cable, and in hermetic container 10, add the negative pressure of default certain value, whole float switch housing parts is made to be in negative pressure or vacuum state, whether detect and observe is had continuous air bubbles to emerge by joint 6, housing weld 8, conductor copper wire 9 outside ball float housing 2, casing neck, sealing fluid, cable, if not having continuous air bubbles, this sealing test is qualified.If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
Secondly, float switch is tested by negative pressure method of testing B, by ball float housing 2, inside conductor 4, plug or binding post 5, casing neck, sealing fluid, cable is outer by joint 6, housing weld 8 is fully recessed in water 1, and in hermetic container 10, add the negative pressure of default certain value, whole float switch housing parts is made to be in negative pressure or vacuum state, detect and observe ball float housing 2, inside conductor 4, plug or binding post 5, casing neck, sealing fluid, cable is outer by joint 6, cable is outer by 7, housing weld 8, whether conductor copper wire 9 position has continuous air bubbles to emerge, if nothing, this sealing test is qualified.If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
Again, float switch is tested by malleation method of testing C, by ball float housing 2, inside conductor 4, casing neck, sealing fluid, cable is outer by joint 6, housing weld 8 is inserted in water 1, and to inside conductor 4, cable is outer is added the normal pressure air pressure presetting certain value by 7, product is made to be in malleation or high pressure conditions, detect and observe ball float housing 2, sealing fluid 3, inside conductor 4, casing neck, sealing fluid, cable is outer by joint 6, cable is outer by 7, housing weld 8, whether conductor copper wire 9 has continuous air bubbles to emerge, if nothing, this sealing test is qualified.If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
Then, float switch is tested by malleation method of testing D, first by ball float housing 2 by analysing or the method such as jewel hole makes ball float housing 2 and water 1 infiltration the most in advance, the two ends of inside conductor 4(4 are exposed independent from the water surface), cable is outer is added the malleation presetting certain values by 7, product is made to be in malleation or high pressure conditions, whether observe is had continuous air bubbles to emerge by joint 6, conductor copper wire 9 outside sealing fluid 3, inside conductor 4, casing neck, sealing fluid, cable, if nothing, this sealing test is qualified.If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
Finally, float switch is tested by malleation method of testing E, first by ball float housing 2 by analysing or the method such as jewel hole makes ball float housing 2 and water 1 infiltration the most in advance, is surfaced in one end of inside conductor 4(4, one end is immersed in the water), cable is outer is added the malleation presetting certain values by 7, product is made to be in malleation or high pressure conditions, observe sealing fluid 3, inside conductor 4, casing neck, sealing fluid, cable outer by joint 6, cable outer by 7, conductor copper wire 9 whether have continuous air bubbles to emerge, if nothing, this sealing test is qualified.If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
In sum, the method for testing of the present invention in the case of not destroying float switch product ontology, can accurately test the sealing property of product；And by forming pressure differential inside and outside float switch, observe product casing periphery and the sealing of joint portion under a certain pressure.The method of testing of the present invention is simple to operate, without destructive, accuracy is high, low cost, and efficiency is high, to improving float switch manufacturing process, increasing product reliability and have important function.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (1)
1. the method for testing tightness of a float switch, it is characterised in that comprise the following steps: part or all and partial cables line of float switch are inserted in water container (11), and is enclosed within hermetic container (10)；The internal pressure formation malleation of float switch housing and cable is regulated by regulation sealing test instrument, or adjustment housings and the outside negative pressure of the pressure initiation outside cable, or the mode that employing malleation is combined with negative pressure simultaneously, thus cause external and internal pressure poor, carry out sealing test；Under pressure differential, see whether that bubble produces, respectively the sealing between test float ball switch device casing peripheral sealing, sealing, wire inner sealing, casing neck and cable, sealing fluid between wire and housing；
Described performing leak test includes that malleation test is tested with negative pressure；
The test of described negative pressure is at float switch, or the peripheral of water forms negative pressuren zone or region of no pressure so that around float switch, the ambient air pressure of water less than float switch internal cavity air pressure, form Negative Pressure Difference；
The test of described malleation is for injecting gases at high pressure in float switch internal cavity, cable so that the air pressure in float switch internal cavity, cable is peripheral higher than float switch, the periphery of water, the air pressure that cable is peripheral, forms positive differential pressure；
The test of described negative pressure includes: by ball float housing (2), inside conductor (4), casing neck, sealing fluid and cable are outer by joint (6), housing weld (8) is fully recessed in water (1), and in hermetic container (10), add the negative pressure of default certain value, whole float switch housing parts is made to be in negative pressure or vacuum state, detect and observe ball float housing (2), casing neck, sealing fluid and cable are outer by joint (6), housing weld (8), whether conductor copper wire (9) place has continuous air bubbles to emerge, if there is no continuous air bubbles, this sealing test is qualified；If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem；And, the test of described negative pressure may further comprise: ball float housing (2), inside conductor (4), plug or binding post (5), casing neck, sealing fluid and cable are outer by joint (6), conductor copper wire (9) is fully recessed in water (1), and in hermetic container (10), add the negative pressure of default certain value, whole float switch housing parts is made to be in negative pressure or vacuum state, detect and observe ball float housing (2), inside conductor (4), plug or binding post (5), casing neck, sealing fluid and cable are outer by joint (6), cable is outer by (7), housing weld (8), whether conductor copper wire (9) position has continuous air bubbles to emerge, if nothing, this sealing test is qualified；If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem；
By ball float housing (2), inside conductor (4), casing neck, sealing fluid and cable are outer by joint (6), housing weld (8) is inserted in water (1), and to inside conductor (4), cable is outer is added the normal pressure air pressure presetting certain value by (7), product is made to be in malleation or high pressure conditions, detect and observe ball float housing (2), sealing fluid (3), inside conductor (4), casing neck, sealing fluid and cable are outer by joint (6), cable is outer by (7), housing weld (8), whether conductor copper wire (9) has continuous air bubbles to emerge, if nothing, this sealing test is qualified；If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem；
The test of described malleation farther includes: first by ball float housing (2) by analysing or jewel hole method makes the infiltration the most in advance of ball float housing (2) and water (1), the two ends of inside conductor (4) are exposed independent from the water surface, to inside conductor (4), the outer malleation being added default certain value by (7) of cable, product is made to be in malleation or high pressure conditions, observe whether sealing fluid (3), inside conductor (4), casing neck, sealing fluid and cable are outer is had continuous air bubbles to emerge by joint (6), conductor copper wire (9), if nothing, this sealing test is qualified；If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem；
The test of described malleation may further comprise: first by ball float housing (2) by analysing or jewel hole method makes the infiltration the most in advance of ball float housing (2) and water (1), make one end of inside conductor (4) surface, one end is immersed in the water；To inside conductor (4), the outer malleation being added default certain value by (7) of cable, product is made to be in malleation or high pressure conditions, observe whether sealing fluid (3), inside conductor (4), casing neck, sealing fluid and cable are outer is had continuous air bubbles to emerge by joint (6), the outer quilt (7) of cable, conductor copper wire (9), if nothing, this sealing test is qualified；If any continuous air bubbles, then the position that bubble occurs indicates that corresponding detecting position is buied property raw poor sealing problem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110031513.5A CN102175405B (en) | 2011-01-29 | 2011-01-29 | A kind of method for testing tightness of float switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110031513.5A CN102175405B (en) | 2011-01-29 | 2011-01-29 | A kind of method for testing tightness of float switch |
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| CN102175405A CN102175405A (en) | 2011-09-07 |
| CN102175405B true CN102175405B (en) | 2016-08-03 |
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| CN201110031513.5A Expired - Fee Related CN102175405B (en) | 2011-01-29 | 2011-01-29 | A kind of method for testing tightness of float switch |
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| US11134156B1 (en) * | 2020-03-31 | 2021-09-28 | Saudi Arabian Oil Company | System and method for detecting and alerting of flooding in telecommunications manholes |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768305A (en) * | 1971-02-24 | 1973-10-30 | B Ivnitsky | Installation for testing pressure tightness of check valve closing element |
| JPH08240506A (en) * | 1995-03-02 | 1996-09-17 | Churyo Eng Kk | Apparatus for detecting leak of container |
| JP2004245752A (en) * | 2003-02-17 | 2004-09-02 | Murata Mfg Co Ltd | Method and apparatus for sealing test |
| JP2006244751A (en) * | 2005-03-01 | 2006-09-14 | Kuramo Electric Co Ltd | Float switch |
| CN201004004Y (en) * | 2007-02-08 | 2008-01-09 | 付孜隽 | An electromotor leakage detection device |
-
2011
- 2011-01-29 CN CN201110031513.5A patent/CN102175405B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3768305A (en) * | 1971-02-24 | 1973-10-30 | B Ivnitsky | Installation for testing pressure tightness of check valve closing element |
| JPH08240506A (en) * | 1995-03-02 | 1996-09-17 | Churyo Eng Kk | Apparatus for detecting leak of container |
| JP2004245752A (en) * | 2003-02-17 | 2004-09-02 | Murata Mfg Co Ltd | Method and apparatus for sealing test |
| JP2006244751A (en) * | 2005-03-01 | 2006-09-14 | Kuramo Electric Co Ltd | Float switch |
| CN201004004Y (en) * | 2007-02-08 | 2008-01-09 | 付孜隽 | An electromotor leakage detection device |
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| CN102175405A (en) | 2011-09-07 |
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Granted publication date: 20160803 Termination date: 20170129 |