CN103048092B - Test device and test method for longitudinal air permeability performance of cable - Google Patents
Test device and test method for longitudinal air permeability performance of cable Download PDFInfo
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- CN103048092B CN103048092B CN201210549123.1A CN201210549123A CN103048092B CN 103048092 B CN103048092 B CN 103048092B CN 201210549123 A CN201210549123 A CN 201210549123A CN 103048092 B CN103048092 B CN 103048092B
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- test container
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- pressure test
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Abstract
The invention relates to a test device and a test method for longitudinal air permeability performance of a cable. The test device is characterized in that an air pressure test container is of a sealed rectangular structure, the top wall of the air pressure test container is provided with an exhaust valve, the center of one side surface of the air pressure test container is provided with a cable sealing connector, one end of the cable stretches into the air pressure test container from the cable sealing connector, an outer end of the cable is inserted in a water storage container and is positioned under a water line of the water storage container, the front end surface of the air pressure test container is provided with a high-pressure air pipe connector, an outlet of an air pressure pump is connected with the high-pressure air pipe connector of the air pressure test container through a high-pressure air pipe, the position on the high-pressure air pipe close to the air pressure pump is provided with an air pressure control valve, and the position on the high-pressure air pipe close to the air pressure test container is provided with a pressure meter. The test method is characterized by opening the air pressure control valve after starting the air pressure pump, closing the air pressure control valve and keeping for a set time when the reading on the pressure meter reaches a set value, observing whether bubbles bubble at the outer end of the cable or not, and obtaining the displacement situation of each component of the cable relative to a protection sleeve. According to the test device and the test method, disclosed by the invention, the whole process is simple, convenient, fast, accurate and reliable.
Description
Technical field
The present invention relates to a kind of cable testing apparatus, particularly the longitudinal air leakage test device of a kind of cable.The invention still further relates to a kind of longitudinal air leakage test method of cable.
Background technology
Along with the development on the gentle lower naval vessel of deep sea energy source exploitation, under requiring supporting gas, cable has the longitudinal air-tightness bearing large pressure, longitudinal air-tightness and longitudinal air-tightness.This just requires corresponding test unit and test method detects, and current relevant criterion does not provide test unit for these Performance Detection and test method.
Summary of the invention
Primary and foremost purpose of the present invention is, provides a kind of cable longitudinal air leakage test device, can carry out longitudinal air leakage test quickly and easily to cable.
For realizing above object, the longitudinal air leakage test device of a kind of cable provided by the present invention, comprise gas pressure test container, air lift pump and tank, described gas pressure test container is closed rectangular structure, the roof of described gas pressure test container is provided with vent valve, the center of a side of described gas pressure test container is provided with cable sealed joint, one end of cable is stretched into described gas pressure test container from described cable sealed joint, and the external end head of described cable to be inserted in described tank and to be positioned at below the waterline of tank; The front end face of described gas pressure test container is provided with high-pressure air pipe joint, described air pressure delivery side of pump is connected by the high-pressure air pipe joint of high-pressure air pipe with described gas pressure test container, position near described air lift pump on described high-pressure air pipe is provided with pneumatic control valve, is provided with tensimeter near the position of described gas pressure test container.
Relative to prior art, the present invention achieves following beneficial effect: stretched into described gas pressure test container from described cable sealed joint one end of cable, and the inner termination of cable can be made to be exposed in high pressure gas, tests it and whether produces Longitudinal Leakage; When air lift pump pressurizes to gas pressure test container, cable bears very large longitudinal pressure, if longitudinal air-tightness of cable is poor, then under the effect of high pressure, gas in gas pressure test container can progressively infiltrate from the inner termination of cable, and flow along the length direction of cable, until emerge from the external end head of cable, just can observe easily by emitting bubble in tank.
Another object of the present invention is, provide a kind of cable longitudinal air leakage test method, the method can carry out longitudinal air leakage test to cable quickly and easily.
For realizing above object, the longitudinal air leakage test method of cable provided by the present invention, comprise the following steps successively: (1) intercepts the long cable for 1.5m under the room temperature environment of 20 DEG C ± 5 DEG C, cable one end is stretched in described gas pressure test container by described cable sealed joint, described cable sealed joint and described gas pressure test container realize sealing, and the external end head of cable to be inserted in described tank and to be positioned at below the waterline of tank; (2) vent valve is closed; (3) first start air lift pump, then open pneumatic control valve, observe pressure gauge reading simultaneously, when pressure gauge reading reaches setting value, first close pneumatic control valve, then close air lift pump; (4) whether, under gas pressure test container being remained on set pressure, observing cable external end head has bubble to emerge; After continuing to the stipulated time, open pneumatic control valve, make the release of gas pressure test container; (5) take off cable, estimate the misalignment of each assembly relative to sheath of cable.
Relative to prior art, method of the present invention achieves following beneficial effect: stretched into described gas pressure test container from described cable sealed joint one end of cable, and the inner termination of cable can be made to be exposed in high pressure gas, tests it and whether produces Longitudinal Leakage; Close vent valve by after gas pressure test container closure, first start air lift pump, open pneumatic control valve again, prevent the middle air-flow of gas pressure test container from going out, by observing tensimeter, when the air pressure determining in gas pressure test container reaches setting value, first close pneumatic control valve, close air lift pump again, now tensimeter is communicated with gas pressure test container by high-pressure air pipe, and manometric indicating value is exactly the air pressure in gas pressure test container; The sheath of cable bears very large longitudinal pressure, if longitudinal air-tightness of cable is poor, then under the effect of high pressure, the gas in gas pressure test container can progressively infiltrate from the inner termination of cable, and flows, until emerge from external end head along the length direction of cable; Take off cable, each assembly of range estimation cable is relative to the misalignment of sheath, and as displacement, to exceed limit value then undesirable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the longitudinal air leakage test device of cable of the present invention.
In figure: 1. gas pressure test container; 1a. cable sealed joint; 2. vent valve; 3. air lift pump; 4. high-pressure air pipe; 5. pneumatic control valve; 6. tensimeter; 7. cable; 8. tank.
Embodiment
The longitudinal air leakage test device of cable of the present invention comprises gas pressure test container 1, air lift pump 3 and tank 8.Gas pressure test container 1 is the rectangular structure closed, the roof of gas pressure test container 1 is provided with vent valve 2, the center of a side of gas pressure test container 1 is provided with cable sealed joint 1a, one end of cable 7 is stretched into gas pressure test container 1 from cable sealed joint, and the external end head of cable 7 to be inserted in tank 8 and to be positioned at below the waterline of tank; The front end face of gas pressure test container 1 is provided with high-pressure air pipe joint, the outlet of air lift pump 3 is connected with the high-pressure air pipe joint of gas pressure test container 1 by high-pressure air pipe 4, position near air lift pump 3 on high-pressure air pipe 4 is provided with pneumatic control valve 5, is provided with tensimeter 6 near the position of gas pressure test container 1.
The longitudinal air leakage test method of cable of the present invention, comprise the following steps successively: (1) intercepts the long cable for 1.5m under the room temperature environment of 20 DEG C ± 5 DEG C, cable 7 one end is stretched in gas pressure test container 1 by cable sealed joint 1a, cable sealed joint 1a and gas pressure test container 1 realize sealing, and the external end head of cable 7 to be inserted in tank 8 and to be positioned at below the waterline of tank 8; (2) close vent valve 2 gas pressure test container 1 is closed; (3) first start air lift pump 3, then open pneumatic control valve 5, observe tensimeter 6 reading simultaneously, when pressure gauge reading reaches setting value, first close pneumatic control valve 5, then close air lift pump 3, now the indicating value of tensimeter 6 is exactly the air pressure in gas pressure test container 1; (4) whether, under gas pressure test container 1 being remained on set pressure, observing cable 7 external end head has bubble to emerge; If longitudinal air-tightness of cable is poor, then under the effect of high pressure, the gas in gas pressure test container 1 can progressively infiltrate from the inner termination of cable 7, and flows, until emerge from external end head along the length direction of cable 7; After continuing to the stipulated time, open pneumatic control valve 5, make gas pressure test container 1 release; (5) take off cable, each assembly of range estimation cable is relative to the misalignment of sheath, and as displacement, to exceed limit value then undesirable.
These are only the better possible embodiments of the present invention, non-ly therefore limit to scope of patent protection of the present invention, source of the gas preferably adopts nitrogen.In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of application claims.
Claims (1)
1. an employing test unit carries out the longitudinal air leakage test method of cable, described test unit comprises gas pressure test container, air lift pump and tank, described gas pressure test container is closed rectangular structure, the roof of described gas pressure test container is provided with vent valve, the center of a side of described gas pressure test container is provided with cable sealed joint, one end of cable is stretched into described gas pressure test container from described cable sealed joint, and the external end head of described cable to be inserted in described tank and to be positioned at below the waterline of tank, the front end face of described gas pressure test container is provided with high-pressure air pipe joint, described air pressure delivery side of pump is connected by the high-pressure air pipe joint of high-pressure air pipe with described gas pressure test container, position near described air lift pump on described high-pressure air pipe is provided with pneumatic control valve, tensimeter is provided with near the position of described gas pressure test container, it is characterized in that, comprise the following steps successively: (1) intercepts the long cable for 1.5m under the room temperature environment of 20 DEG C ± 5 DEG C, cable one end is stretched in described gas pressure test container by described cable sealed joint, described cable sealed joint and described gas pressure test container realize sealing, the external end head of cable to be inserted in described tank and to be positioned at below the waterline of tank, (2) vent valve is closed, (3) first start air lift pump, then open pneumatic control valve, observe pressure gauge reading simultaneously, when pressure gauge reading reaches setting value, first close pneumatic control valve, then close air lift pump, (4) whether, under gas pressure test container being remained on set pressure, observing cable external end head has bubble to emerge, after continuing to the stipulated time, open pneumatic control valve, make the release of gas pressure test container, (5) take off cable, estimate the misalignment of each assembly relative to sheath of cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210549123.1A CN103048092B (en) | 2012-12-18 | 2012-12-18 | Test device and test method for longitudinal air permeability performance of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210549123.1A CN103048092B (en) | 2012-12-18 | 2012-12-18 | Test device and test method for longitudinal air permeability performance of cable |
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| Publication Number | Publication Date |
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| CN103048092A CN103048092A (en) | 2013-04-17 |
| CN103048092B true CN103048092B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210549123.1A Expired - Fee Related CN103048092B (en) | 2012-12-18 | 2012-12-18 | Test device and test method for longitudinal air permeability performance of cable |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364149A (en) * | 2013-07-29 | 2013-10-23 | 天津六〇九电缆有限公司 | Testing device and testing method for water tightness of cable |
| CN109781351B (en) * | 2017-11-10 | 2021-11-19 | 神讯电脑(昆山)有限公司 | Air tightness detection device |
| CN109269741A (en) * | 2018-11-09 | 2019-01-25 | 安徽宇测线缆质检技术有限公司 | A kind of cable longitudinally water blocking detection device |
| CN113963859A (en) * | 2021-10-27 | 2022-01-21 | 深圳市华瑞线缆科技有限公司 | Full-automatic production line for cable processing |
| CN114088573B (en) * | 2021-11-12 | 2023-09-12 | 国网湖南省电力有限公司 | High-voltage cable insulation damage detection method, system and medium |
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| EP0021816A1 (en) * | 1979-07-02 | 1981-01-07 | Mitsubishi Rayon Co., Ltd. | Method and system of detecting pinholes in hollow fibres |
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| EP0089823A2 (en) * | 1982-03-19 | 1983-09-28 | Olympus Optical Co., Ltd. | Leakage detector of endoscopes |
| CN2383057Y (en) * | 1999-06-01 | 2000-06-14 | 王杵 | Air keeping monitoring and warning device for inflated cable |
| CN1932464A (en) * | 2006-10-06 | 2007-03-21 | 成都飞机工业（集团）有限责任公司 | Airtight type tested pieces air-leakage detecting device |
| CN202329958U (en) * | 2011-12-07 | 2012-07-11 | 东莞龙杰电子有限公司 | Water resistance testing device for cable bundle |
| CN203011636U (en) * | 2012-12-18 | 2013-06-19 | 江苏远洋东泽电缆股份有限公司 | Cable longitudinal air-tightness test apparatus |
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Patent Citations (7)
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|---|---|---|---|---|
| EP0021816A1 (en) * | 1979-07-02 | 1981-01-07 | Mitsubishi Rayon Co., Ltd. | Method and system of detecting pinholes in hollow fibres |
| JPS58117434A (en) * | 1981-12-30 | 1983-07-13 | Showa Electric Wire & Cable Co Ltd | Method for locating breakdown point of cable |
| EP0089823A2 (en) * | 1982-03-19 | 1983-09-28 | Olympus Optical Co., Ltd. | Leakage detector of endoscopes |
| CN2383057Y (en) * | 1999-06-01 | 2000-06-14 | 王杵 | Air keeping monitoring and warning device for inflated cable |
| CN1932464A (en) * | 2006-10-06 | 2007-03-21 | 成都飞机工业（集团）有限责任公司 | Airtight type tested pieces air-leakage detecting device |
| CN202329958U (en) * | 2011-12-07 | 2012-07-11 | 东莞龙杰电子有限公司 | Water resistance testing device for cable bundle |
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| "电缆纵向水密封性能检测技术研究";陈佶民 等;《电线电缆》;20050630(第3期);第27-29页第2-3节 * |
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| CN103048092A (en) | 2013-04-17 |
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