CN112903197A - Waterproof detecting system of cable - Google Patents
Waterproof detecting system of cable Download PDFInfo
- Publication number
- CN112903197A CN112903197A CN202110074334.3A CN202110074334A CN112903197A CN 112903197 A CN112903197 A CN 112903197A CN 202110074334 A CN202110074334 A CN 202110074334A CN 112903197 A CN112903197 A CN 112903197A
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- cable
- guide wheel
- water
- rack
- water injection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a waterproof cable detection system, which belongs to the field of waterproof detection and comprises a water injection pressure mechanism, a microwave heater and an infrared imager, wherein the water injection pressure mechanism, the microwave heater and the infrared imager are arranged on a rack; the microwave heater and the infrared imager are located above the water injection pressure applying mechanism, and a cable to be tested is injected with water and then sequentially passes through the water injection pressure applying mechanism, the microwave heater and the infrared imager. Make water from damaged position seepage to the cable in through water injection mechanism of exerting pressure, then through microwave heater to cable heating, because medium heat production ability is different, the position that has the water seepage can be heated by large tracts of land, can clear demonstration through infrared imager and show.
Description
Technical Field
The invention relates to the field of waterproof detection, in particular to a cable waterproof detection system.
Background
According to statistics, the failure reasons and the occupied proportion of the direct-buried high-voltage cross-linked cable are as follows: 53% of water trees, 19% of artificial damage, 14% of natural damage, 10% of manufacturing failure, 2% of construction failure and 2% of unknown reason. From the training of cable water inflow accidents for many years, two main ways of water inflow are water inflow along the longitudinal direction of a conductor and radial and longitudinal water inflow among extrusion coating layers (an insulating layer, a semi-conductive shielding layer and an outer sheath), wherein the radial water inflow is more common. The longitudinal water inflow is mainly that in the cable manufacturing process, a hole is formed between a conductor and a lead due to improper sealing or insulation, and water enters a water cooling section. The holes in the jacket allow water to enter the cable and diffuse radially and longitudinally. During storage, if the cable head is not properly sealed, rain water may soak into the cable, and then water may creep along the cable as the cable drum rotates. During laying, after the cable is cut off, if the cable is dragged away in the cable trench filled with water without sealing the end, a large amount of water enters the conductor. The radial water inflow is basically caused by the breakage of a cable sheath during or after the laying. The causes of the damage are: the iron nail or sharp object punctures and scratches, and the cable is chiseled when the channel is excavated. The main causes of damage to underwater cables crossing rivers, lakes, and seas are ship breakdown, fishing reel trawls, or dredge boats.
For the water-cooled cable, a sealing pipe is required to be arranged in the water-cooled cable for placing cooling liquid, when the sealing pipe is broken, the cable is greatly influenced, and an anti-leakage test is required to be carried out on the cable after the cable is produced; the existing detection is not accurate enough, and the specific damaged position cannot be well determined.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a cable waterproof detection system which can conveniently and accurately detect a damaged position so as to ensure the accurate waterproof test of a cable.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a waterproof detection system for a cable, which comprises a water injection pressure mechanism, a microwave heater and an infrared imager, wherein the water injection pressure mechanism, the microwave heater and the infrared imager are arranged on a rack; the microwave heater and the infrared imager are located above the water injection pressure applying mechanism, and a cable to be tested is injected with water and then sequentially passes through the water injection pressure applying mechanism, the microwave heater and the infrared imager.
The invention has the preferable technical scheme that the liquid level in the cable to be measured is lower than the working plane of the microwave heater.
The invention has the preferable technical scheme that the water injection pressure mechanism comprises a reservoir positioned at the bottommost end and a water pump positioned in the reservoir, wherein the output end of the water pump is provided with a water outlet pipe, the other end of the water outlet pipe is connected to the side wall of the upper end of the rack, and the end part of the water outlet pipe is provided with a water injection joint for connecting with a cable.
The invention has the preferable technical scheme that the water injection pressure mechanism comprises a guide rod arranged along the vertical direction, a connector is arranged on the guide rod, and the installation height of the connector on the guide rod is adjustable; and a cable guide wheel is arranged on the connecting head.
The invention has the preferable technical scheme that the guide rods are positioned at two sides of the rack, one side of the rack is provided with a pay-off rack, a cable to be tested on the pay-off rack is wound from the cable guide wheel at one side to the cable guide wheel at the other side, and the pay-off rack is higher than the cable guide wheel.
The invention has the preferable technical scheme that a first guide wheel and a second guide wheel are respectively arranged on two sides of the top of the rack; a wire-rewinding frame is arranged on one side of the machine frame, and the second guide wheel is located on one side close to the wire-rewinding frame.
The invention preferably provides that the second guide wheel is higher than the first guide wheel, so that the height of the cable from the first guide wheel to the second guide wheel is higher and higher.
The microwave heating device and the infrared imager are fixed between the first guide wheel and the second guide wheel.
The invention has the beneficial effects that:
the invention provides a waterproof detection system for a cable, which comprises a water injection pressure mechanism, a microwave heater and an infrared imager, wherein the water injection pressure mechanism, the microwave heater and the infrared imager are arranged on a rack; the microwave heater and the infrared imager are located above the water injection pressure applying mechanism, and a cable to be tested is injected with water and then sequentially passes through the water injection pressure applying mechanism, the microwave heater and the infrared imager. Make water from damaged position seepage to the cable in through water injection mechanism of exerting pressure, then through microwave heater to cable heating, because medium heat production ability is different, the position that has the water seepage can be heated by large tracts of land, can clear demonstration through infrared imager and show.
Drawings
FIG. 1 is a general schematic diagram of a cable waterproofing detection system provided in an embodiment of the present invention;
FIG. 2 is a schematic side view of a cable water-proofing detection system provided in an embodiment of the present invention;
in the figure:
1. a frame; 2. a water injection pressure mechanism; 3. a first guide wheel; 4. a second guide wheel; 5. an infrared imager; 6. a microwave heater; 7. a pay-off rack; 8. a take-up stand; 21. a reservoir; 22. a water pump; 23. a water outlet pipe; 24. a guide bar; 25. a connector; 26. a cable guide wheel; 27. a water injection joint.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1-2, the present embodiment provides a cable waterproof detection system, which includes a water injection pressure mechanism 2 mounted on a rack 1, a microwave heater 6, and an infrared imager 5; the microwave heater 6 and the infrared imager 5 are located above the water injection pressure mechanism 2, and a cable to be tested is injected with water and then sequentially passes through the water injection pressure mechanism 2, the microwave heater 6 and the infrared imager 5. The cable is filled with a test liquid or purified water, and a certain pressure is applied to the part of the water filling pressure applying mechanism 2 while contacting with water for a period of time, so that water has enough time to enter the cable from the damaged position. Because water produces the heat and all is fast than other materials of cable under the microwave action, so in the position that takes place the damage, because water content is higher in the cable to this position can produce more heat after heating through microwave applicator 6, and the scope that generates heat also can extend to in the whole cable cross-section, thereby can clear differentiation seepage position after detecting through infrared imager 5.
For more accurate detection, the liquid level in the cable to be detected is lower than the working plane of the microwave heater 6. In the position where no leakage occurs, water flows only through the sealed tube inside the cable, and the microwave heater 6 is positioned at a high level so that when the cable is moved to this position, there is no water flow in the sealed tube and only the leakage position has water flow penetrating into the cable. Therefore, when the microwave heater 6 heats, the position of the cable which is not damaged can not be heated almost, the influence of water flow in the sealing tube on thermal imaging is avoided, and the detection is more accurate.
Preferably, the water injection pressurizing mechanism 2 comprises a reservoir 21 located at the bottom end and a water pump 22 located in the reservoir 21, an output end of the water pump 22 is provided with a water outlet pipe 23, the other end of the water outlet pipe 23 is connected to the upper end side wall of the rack 1, and an end of the water outlet pipe 23 is provided with a water injection joint 27 for connecting with a cable. At the time of detection, the end of the cable is inserted into the water filling joint 27, and the inner sealing tube is filled with water. After the final detection, the water in the sealed tube is discharged from the other end of the cable back to the reservoir 21 for recycling. The water filling joint 27 is provided at the upper end so that the liquid level in the sealing tube can be conveniently controlled.
Preferably, the water injection pressure mechanism 2 comprises a guide rod 24 arranged along the vertical direction, a connector 25 is arranged on the guide rod 24, and the installation height of the connector 25 on the guide rod 24 is adjustable; the connecting head 25 is provided with a cable guide wheel 26. By varying the mounting height of the cable guide wheel 26 on the guide bar 24, the liquid depth of the cable can be adjusted, thereby varying the pressure of the liquid, so that the waterproof state of the cable at different pressures can be detected. Some more tiny seepage can also be detected through increase pressure for in limited time, water can be from damaged position seepage to cable, under the condition of increase pressure, rivers can permeate more, thereby make infrared imager 5 show more accurately after heating.
Preferably, the guide rods 24 are located on two sides of the rack 1, a pay-off rack 7 is arranged on one side of the rack 1, a cable to be tested on the pay-off rack 7 is wound from the cable guide wheel 26 on one side to the cable guide wheel 26 on the other side, and the pay-off rack 7 is higher than the cable guide wheel 26. After a period of detection, part of water can be taken away by the side wall of the sealing pipe of the cable, so that the liquid level is reduced, and the detection result is influenced by the reduction of the water pressure. The cable guide wheels 26 on the two sides are independently adjusted, so that under the condition that one cable guide wheel 26 is kept still, the liquid level can be increased by adjusting the other cable guide wheel 26 upwards, and the water pressure at the position of the other cable guide wheel 26 is improved.
Preferably, a first guide wheel and a second guide wheel are respectively arranged on two sides of the top of the frame 1; a take-up stand 8 is arranged on one side of the machine frame 1, and the second guide wheel is located on one side close to the take-up stand 8. Further, the second guide wheel is higher than the first guide wheel, so that the height of the cable from the first guide wheel to the second guide wheel is higher and higher. Make the cable be in the tilt state to make there be some rivers along the sealed tube inner wall by promoting the back, can lead to the water conservancy diversion again along the inclined plane under the effect of gravity and go back, make rivers loss few, the inside too much water that can not stop of cable after the detection. Meanwhile, water vapor can be partially formed after being heated by the microwave heater 6, and the water vapor can flow back again after being condensed in the sealing tube. Preferably, the microwave heater 6 and the infrared imager 5 are fixed between the first guide wheel and the second guide wheel.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.
Claims (8)
1. The utility model provides a waterproof detecting system of cable which characterized in that:
comprises a water injection pressure mechanism (2) arranged on a frame (1), a microwave heater (6) and an infrared imager (5); the microwave heater (6) and the infrared imager (5) are located above the water injection pressure mechanism (2), and a cable to be tested is injected with water and then sequentially passes through the water injection pressure mechanism (2), the microwave heater (6) and the infrared imager (5).
2. The waterproof cable detection system of claim 1, wherein:
the liquid level in the cable to be measured is lower than the working plane of the microwave heater (6).
3. The waterproof cable detection system of claim 1, wherein:
the water injection pressing mechanism (2) comprises a water storage tank (21) located at the bottommost end and a water pump (22) located in the water storage tank (21), an outlet pipe (23) is arranged at the output end of the water pump (22), the other end of the outlet pipe (23) is connected to the upper end side wall of the rack (1), and a water injection joint (27) used for being connected with a cable is arranged at the end part of the outlet pipe (23).
4. The waterproof cable detection system of claim 1, wherein:
the water injection pressure mechanism (2) comprises a guide rod (24) arranged in the vertical direction, a connector (25) is arranged on the guide rod (24), and the installation height of the connector (25) on the guide rod (24) is adjustable; and a cable guide wheel (26) is arranged on the connecting head (25).
5. The waterproof cable detection system of claim 4, wherein:
the guide rod (24) is located on two sides of the rack (1), a pay-off rack (7) is arranged on one side of the rack (1), cables to be tested on the pay-off rack (7) are wound to the cable guide wheel (26) on the other side from the cable guide wheel (26), and the pay-off rack (7) is higher than the cable guide wheel (26).
6. The waterproof cable detection system of claim 1, wherein:
a first guide wheel and a second guide wheel are respectively arranged on two sides of the top of the rack (1); a take-up stand (8) is arranged on one side of the rack (1), and the second guide wheel is located on one side close to the take-up stand (8).
7. The waterproof cable detection system of claim 6, wherein:
the second guide wheel is higher than the first guide wheel, so that the height of the cable from the first guide wheel to the second guide wheel is higher and higher.
8. The waterproof cable detection system of claim 7, wherein:
the microwave heater (6) and the infrared imager (5) are fixed between the first guide wheel and the second guide wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110074334.3A CN112903197B (en) | 2021-01-20 | 2021-01-20 | Waterproof detecting system of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110074334.3A CN112903197B (en) | 2021-01-20 | 2021-01-20 | Waterproof detecting system of cable |
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| Publication Number | Publication Date |
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| CN112903197A true CN112903197A (en) | 2021-06-04 |
| CN112903197B CN112903197B (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110074334.3A Active CN112903197B (en) | 2021-01-20 | 2021-01-20 | Waterproof detecting system of cable |
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| CN (1) | CN112903197B (en) |
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| CN107782737A (en) * | 2016-08-26 | 2018-03-09 | 天津山旗线缆有限公司 | A kind of cable molding detection device |
| CN107843395A (en) * | 2017-09-07 | 2018-03-27 | 国网浙江省电力公司宁波供电公司 | Cable tunnel cement section of jurisdiction defect multi-pose infiltration characteristic infrared thermal imagery experimental provision |
| CN108652595A (en) * | 2018-03-30 | 2018-10-16 | 健康力（北京）医疗科技有限公司 | A kind of infra-red thermal imaging system and thermal imaging method |
| CN109752149A (en) * | 2019-02-26 | 2019-05-14 | 上海国缆检测中心有限公司 | A kind of medium-low voltage power cable apparatus for permeability test |
| CN110779660A (en) * | 2019-11-08 | 2020-02-11 | 杭州应敏科技有限公司 | Cable protection pipe sealing test device |
| CN211347229U (en) * | 2019-12-14 | 2020-08-25 | 涿州市文信石油装备有限公司 | Cable water tightness testing machine convenient to test |
-
2021
- 2021-01-20 CN CN202110074334.3A patent/CN112903197B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5886636A (en) * | 1997-12-17 | 1999-03-23 | A-Acme, Inc. | Moisture detection and source identification method for structures |
| JP2005098959A (en) * | 2003-08-25 | 2005-04-14 | Taiyo Kogyo Corp | Method of inspecting breakage portion in water-barrier sheet |
| JP2013190229A (en) * | 2012-03-12 | 2013-09-26 | Chugoku Electric Power Co Inc:The | Apparatus and method for tube leak inspection |
| CN102636313A (en) * | 2012-04-11 | 2012-08-15 | 浙江工业大学 | Leakage source detecting device based on infrared thermal imaging processing |
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| CN110779660A (en) * | 2019-11-08 | 2020-02-11 | 杭州应敏科技有限公司 | Cable protection pipe sealing test device |
| CN211347229U (en) * | 2019-12-14 | 2020-08-25 | 涿州市文信石油装备有限公司 | Cable water tightness testing machine convenient to test |
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| CN112903197B (en) | 2023-04-18 |
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