CN110676796A - Power cable sealing device - Google Patents
Power cable sealing device Download PDFInfo
- Publication number
- CN110676796A CN110676796A CN201911011049.6A CN201911011049A CN110676796A CN 110676796 A CN110676796 A CN 110676796A CN 201911011049 A CN201911011049 A CN 201911011049A CN 110676796 A CN110676796 A CN 110676796A
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- Prior art keywords
- sealing
- power cable
- supporting
- cable
- sealing device
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- 238000007789 sealing Methods 0.000 title claims abstract description 112
- 238000012360 testing method Methods 0.000 claims abstract description 42
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 238000010030 laminating Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000009434 installation Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 240000005572 Syzygium cordatum Species 0.000 description 2
- 235000006650 Syzygium cordatum Nutrition 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G15/00—Cable fittings
- H02G15/013—Sealing means for cable inlets
-
- 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
- G01M3/022—Test plugs for closing off the end of a pipe
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Installation Of Indoor Wiring (AREA)
Abstract
The invention relates to the field of electrical equipment test equipment, in particular to a power cable sealing device which comprises a supporting element, a sealing element, a fixing element, a test interface and a detection element, wherein the sealing element is arranged in a U-shaped structure, and two side walls of the sealing element are attached to the axial surface of the end part of a cable and used for ensuring the sealing property between the two side walls of the sealing element and the axial surface of the end part of the cable; the supporting element is arranged at the bottom of the sealing element, is abutted against the cross section of the end part of the cable, and is used for isolating the end part of the cable from the bottom of the sealing element to protect the sealing element; the fixing element is arranged corresponding to the sealing element and used for ensuring the sealing property of the sealing element; the supporting element, the sealing element, the fixing element and the cable correspondingly form a closed airflow passage for providing a test interface for the sealing performance of the cable; the test interface is arranged corresponding to the closed airflow passage, and the detection element is arranged in the test interface and used for detecting the moisture condition of the water entering the cable.
Description
Technical Field
The invention relates to the field of electrical equipment test equipment, in particular to a power cable sealing device which is mainly used for field test of sealing and sealing states of power cable transportation and installation.
Background
The high-voltage and ultrahigh-voltage power cable is an important link of power transmission, and the performance of the cable is directly related to the safe and stable operation of a power system. The performance of an insulating layer and a buffer layer of the cable plays a decisive role on the cable, but in the transportation, field installation and maintenance processes of the cable, the cable is often affected with damp due to untight sealing, and particularly in the southern city of China, the underground water level is low, rain in four seasons occurs, and the cable is frequently affected with damp. Because the damage of cable intaking and being affected with damp has the disguise, can not cause the breakdown nature trouble in a short time, but under the long-term effect of electric field, the cable water tree and the destruction of electric tree to the insulating layer can shorten the life of cable design 30 years greatly, and the difficult restoration of cable water tree can only change whole section cable, can bring huge economic loss and serious social influence. At present, to the cable defect of weing that intakes, use the sealed sealing cap of cable end to prevent at present on the market, but the leakproofness of sealing cap can't detect, and when carrying out the experimental test of sealing performance, need take off sealing cap, the test efficiency is low.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a power cable sealing device which can protect the sealing performance of a power cable in the processes of transportation, field installation and maintenance, provides a test interface for testing the sealing performance and has universality for cables of different models.
In order to achieve the purpose, the technical scheme applied by the invention is as follows:
a power cable sealing device comprises a supporting element, a sealing element, a fixing element, a test interface and a detection element, wherein the sealing element is arranged in a U-shaped structure, two side walls of the sealing element are attached to the axial surface of the end part of a cable, the supporting element is arranged at the bottom of the sealing element and is abutted against the transverse section of the end part of the cable, the fixing element and the sealing element are correspondingly arranged, and the supporting element, the sealing element, the fixing element, the test interface and the detection element are arranged,
The fixing element and the cable are correspondingly formed into a closed airflow passage, the test interface and the closed airflow passage are correspondingly arranged, and the detection element is arranged in the test interface.
Furthermore, the supporting element comprises a supporting chassis, a supporting tube and an air path, the supporting chassis is of a disc structure, the supporting tube is of a circular tube structure, the air path is arranged in the supporting tube, the supporting chassis and the supporting tube are integrally made of stainless steel, the section of the supporting chassis and the supporting tube is of a T-shaped structure, and a through hole through which the supporting tube can conveniently penetrate is formed in the bottom of the sealing element.
Further, the outer surface of the supporting chassis is smooth and burr-free.
Further, the diameter of the support chassis is smaller than or equal to the diameter of the cable end.
Further, the outer surface of the supporting tube is provided with external threads.
Further, the stiffness of the support element is greater than 75.
Further, the sealing element material is made of rubber or polyolefin material capable of shrinking under heat.
Further, the fixing element is provided with an internal thread which is matched with an external thread on the outer surface of the support tube.
Furthermore, the test interface comprises a rubber pad and a U-shaped plug, the rubber pad is arranged at the bottom of the U-shaped plug, and inner threads matched with the outer threads on the outer surface of the supporting tube are arranged on two side walls of the U-shaped plug.
Furthermore, the detection element is of a patch type circular structure, the detection element is attached to a rubber mat of the test interface (4), and the diameter of the detection element is smaller than the inner diameter of the support pipe.
The invention has the beneficial effects that:
1) the power cable sealing device disclosed by the invention is simple in structure and convenient to operate, is composed of the supporting element, the sealing element, the fixing element, the test interface and the detection element, and can simultaneously meet the detection functions of sealing and sealing performance;
2) the sealing element is made of rubber materials, sealing is realized by matching the structural size of the rubber and the structural size of the cable, the sealing effect is good, and the cable sealing device has universality for different cable models;
3) the test interface provides test conditions for the cable sealing performance, simplifies the test flow after transportation and installation, and greatly improves the detection efficiency of the cable sealing performance test.
Drawings
FIG. 1 is an overall configuration view of a power cable sealing device according to an embodiment;
FIG. 2 is a diagram of a power cable sealing device support member according to an embodiment;
FIG. 3 is a block diagram of a test interface of a power cable sealing device according to an embodiment;
FIG. 4 is an overall configuration view of a power cable sealing device according to a second embodiment;
FIG. 5 is a structural view of a supporting member of the electric power cable sealing apparatus according to the second embodiment;
FIG. 6 is a schematic diagram of a test interface of the second embodiment of the power cable sealing device.
1. A support element; 11. a support chassis; 12. supporting a tube; 13. a gas circuit; 2. a sealing element; 3. a fixing element; 4. a test interface; 41. a rubber pad; a U-shaped plug; 43. a metal tube; 5. a detection element.
Detailed Description
The technical solution of the present invention is described below with reference to the accompanying drawings and examples.
The first embodiment is as follows:
as shown in fig. 1 to 3, the power cable sealing device according to the present invention includes a supporting element 1, a sealing element 2, a fixing element 3, a testing interface 4 and a detecting element 5, wherein the sealing element 2 is configured in a U-shaped structure, and two side walls of the sealing element 2 are configured to be attached to an axial surface of an end portion of a cable, so as to ensure sealing performance between the two side walls of the sealing element 2 and the axial surface of the end portion of the cable; the supporting element 1 is arranged at the bottom of the sealing element 2, is abutted against the cross section of the end part of the cable, and is used for isolating the end part of the cable from the bottom of the sealing element 2 to protect the sealing element 2; the fixing element 3 is arranged corresponding to the sealing element 2 and used for ensuring the sealing performance of the sealing element 2; the supporting element 1, the sealing element 2, the fixing element 3 and the cable correspondingly form a closed airflow passage for providing a test interface for the sealing performance of the cable; the test interface 4 is arranged corresponding to the closed airflow passage, and the detection element 5 is arranged in the test interface 4 and used for detecting the moisture condition of the water entering the cable.
More specifically, the supporting element 1 includes a supporting chassis 11, a supporting tube 12 and an air passage 13, the supporting chassis 11 is of a disc structure, the supporting tube 12 is of a circular tube structure, the air passage 13 is disposed in the supporting tube 12, the supporting chassis 11 and the supporting tube 12 are integrally made of stainless steel, the cross section of the supporting chassis 11 and the supporting tube 12 is of a T-shaped structure, and a through hole for the supporting tube 12 to pass through is disposed on the bottom of the sealing element 2. When the sealing device is installed, the supporting tube 12 of the supporting element 1 penetrates through the through hole on the bottom of the sealing element 2, and the supporting chassis 11 is attached to the bottom of the sealing element 2 to realize the limit between the supporting element 1 and the sealing element 2.
More specifically, the outer surface of the support chassis 11 is smooth and burr-free. The sealing element 2 can be effectively prevented from being abraded and damaged.
More specifically, the diameter of the support chassis 11 is smaller than or equal to the diameter of the cable end.
More specifically, the outer surface of the support tube 12 is provided with an external thread. Can be used for locking of the fixing element 3.
More specifically, the support element 1 has a hardness greater than 75.
More specifically, the sealing element 2 is made of rubber or polyolefin material capable of shrinking under heat. For ensuring tightness between the two side walls of the sealing element 2 and the axial surface of the cable end.
More specifically, the fixing element 3 is provided with an internal thread which is arranged to cooperate with an external thread on the outer surface of the support tube 12. May be used to seal the gap between the sealing element 2 and the support tube 12.
More specifically, the test interface 4 includes a rubber pad 41 and a U-shaped plug 42, the rubber pad 41 is disposed on the bottom of the U-shaped plug 42, and two side walls of the U-shaped plug 42 are provided with internal threads that are disposed in cooperation with external threads on the outer surface of the support tube 12. The test port 4 can be used for sealing the air passage 13 on the support tube 12.
More specifically, the detection element 5 is a patch type circular structure, the detection element 5 is attached to the rubber pad 41 of the test interface 4, and the diameter of the detection element 5 is smaller than the inner diameter of the support tube 12. The detection element 5 is convenient to be attached to the rubber pad 41 of the test interface 4, and meanwhile, the detection element 5 is used for detecting the moisture condition of the water entering the cable.
In the first embodiment, the installation at the end of the power cable comprises the following steps:
step 1: the support tube 12 of the support element 1 is passed through the through-hole in the bottom of the sealing element 2;
step 2: the fixing element 3 is sleeved on the supporting tube 12 and screwed tightly;
and step 3: attaching the detection element 5 to the surface of the rubber pad 41, and placing the rubber pad 41 and the bottom of the U-shaped plug 42;
and 4, step 4: installing the test interface 4 on the end part of the support tube 12, and sealing the gas path 13;
and 5: the sealing element 2 is sleeved into the end part of the power cable, and is tightly attached to the cable body through interference fit.
In this embodiment, the sealing of the power cable is achieved by the sealing element 2 and the test interface 4, and the sealing integrity of the sealing element 2 is achieved by the pressure generated by the mechanical combination of the support chassis 11 of the support element 1 and the fixing element 3.
Example two:
as shown in fig. 4 to 6, the supporting element 1 is made of a hollow circular ring body, the material is epoxy resin, so as to provide an isolation effect for the sealing element 2 and the end surface of the cable, the sealing element 2 is an integral rubber member, the outer diameter of the integral rubber member is larger than the diameter of the cable, the fixing element 3 provides a fastening force for the sealing element 2 and the contact surface of the cable, typically, a stainless steel rolled strip can be selected, the test interface 4 is made of a rubber pad 41, a U-shaped plug 42 and a metal tube 43, the rubber pad 41 is disposed inside the U-shaped plug 42, one end of the metal tube 43 is in threaded fit with the U-shaped plug 42, the other end of the metal tube 43 is tightly connected with the sealing element 2, and the detecting element 5 is attached to the surface of the rubber pad 41 and.
In the second embodiment, the installation at the end of the power cable comprises the following steps:
step 1: connecting the sealing element 2 with the metal tube 43;
step 2: attaching the detection element 5 to the surface of the rubber pad 41, and forming a complete test interface 4 by the rubber pad 41 and the U-shaped plug 42;
and step 3: placing the support element 1 inside the sealing element 2;
and 4, step 4: sleeving the sealing element 2 into the end part of the power cable;
and 5: the fixing element 3 is sleeved outside the sealing element 2 and fastened on the power cable body through the sealing element 2.
In the second embodiment, the power cable is sealed by the sealing element 2, the fixing element 3 and the test interface 4.
While the embodiments of the present invention have been described, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make various modifications without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (10)
1. A power cable sealing device characterized by: including support element (1), sealing element (2), fixed component (3), test interface (4) and detecting element (5), sealing element (2) set up for the U-shaped structure, the both sides wall of sealing element (2) sets up with the axial surface laminating of cable tip, the bottom of sealing element (2) is located in support element (1) to contradict the setting with the cross section of cable tip, fixed component (3) correspond the setting with sealing element (2), support element (1), sealing element (2), fixed component (3) correspond with the cable and constitute airtight air current route, test interface (4) correspond the setting with airtight air current route, detecting element (5) are located in test interface (4).
2. A power cable sealing device according to claim 1, wherein: the supporting element (1) comprises a supporting chassis (11), a supporting tube (12) and an air path (13), the supporting chassis (11) is of a disc structure, the supporting tube (12) is of a round tube structure, the air path (13) is arranged in the supporting tube (12), the supporting chassis (11) and the supporting tube (12) are integrally made of stainless steel, the section of the supporting chassis is of a T-shaped structure, and a through hole which is convenient for the supporting tube (12) to pass through is formed in the bottom of the sealing element (2).
3. A power cable sealing device according to claim 2, wherein: the outer surface of the supporting chassis (11) is smooth and burr-free.
4. A power cable sealing device according to claim 2, wherein: the diameter of the support chassis (11) is smaller than or equal to the diameter of the cable end.
5. A power cable sealing device according to claim 2, wherein: the outer surface of the supporting tube (12) is provided with external threads.
6. A power cable sealing device according to claim 2, wherein: the support element (1) has a hardness greater than 75.
7. A power cable sealing device according to claim 1, wherein: the sealing element (2) is made of rubber or polyolefin material capable of shrinking under heat.
8. A power cable sealing device according to claim 1, wherein: the fixing element (3) is provided with an internal thread which is matched with the external thread on the outer surface of the supporting tube (12).
9. A power cable sealing device according to claim 1, wherein: the test interface (4) comprises a rubber pad (41) and a U-shaped plug (42), the rubber pad (41) is arranged at the bottom of the U-shaped plug (42), and inner threads matched with the outer threads of the outer surface of the support pipe (12) are arranged on two side walls of the U-shaped plug (42).
10. A power cable sealing device according to claim 1, wherein: the detection element (5) is of a patch type circular structure, the detection element (5) is attached to a rubber mat (41) of the test interface (4), and the diameter of the detection element (5) is smaller than the inner diameter of the support pipe (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911011049.6A CN110676796A (en) | 2019-10-23 | 2019-10-23 | Power cable sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911011049.6A CN110676796A (en) | 2019-10-23 | 2019-10-23 | Power cable sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110676796A true CN110676796A (en) | 2020-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911011049.6A Pending CN110676796A (en) | 2019-10-23 | 2019-10-23 | Power cable sealing device |
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| Country | Link |
|---|---|
| CN (1) | CN110676796A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004015952A (en) * | 2002-06-10 | 2004-01-15 | Sumitomo Electric Ind Ltd | Cable connecting apparatus |
| GB0409225D0 (en) * | 2003-04-25 | 2004-05-26 | Paltexa Ltd | An improved cable joint closure system |
| US20080196919A1 (en) * | 2006-05-29 | 2008-08-21 | Klaus Manfred Steinich | Watertight sensor |
| CN202034748U (en) * | 2011-03-24 | 2011-11-09 | 长沙电缆附件有限公司 | Waterproof cold-shrinking sealing cap for sealing power cable |
| CN204333887U (en) * | 2014-12-15 | 2015-05-13 | 宁波球冠电缆股份有限公司 | A kind of end enclosure structure of inflatable high-tension cable |
| KR101562166B1 (en) * | 2015-02-09 | 2015-10-20 | 신재식 | Waterproof tube for cable connecter |
| CN105591347A (en) * | 2014-10-23 | 2016-05-18 | 无锡市金力电力成套设备有限公司 | Cable connection protection device based on leakage detection and humidity investigation |
| CN210468759U (en) * | 2019-10-23 | 2020-05-05 | 国网电力科学研究院武汉南瑞有限责任公司 | Power cable sealing device |
-
2019
- 2019-10-23 CN CN201911011049.6A patent/CN110676796A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004015952A (en) * | 2002-06-10 | 2004-01-15 | Sumitomo Electric Ind Ltd | Cable connecting apparatus |
| GB0409225D0 (en) * | 2003-04-25 | 2004-05-26 | Paltexa Ltd | An improved cable joint closure system |
| US20080196919A1 (en) * | 2006-05-29 | 2008-08-21 | Klaus Manfred Steinich | Watertight sensor |
| CN202034748U (en) * | 2011-03-24 | 2011-11-09 | 长沙电缆附件有限公司 | Waterproof cold-shrinking sealing cap for sealing power cable |
| CN105591347A (en) * | 2014-10-23 | 2016-05-18 | 无锡市金力电力成套设备有限公司 | Cable connection protection device based on leakage detection and humidity investigation |
| CN204333887U (en) * | 2014-12-15 | 2015-05-13 | 宁波球冠电缆股份有限公司 | A kind of end enclosure structure of inflatable high-tension cable |
| KR101562166B1 (en) * | 2015-02-09 | 2015-10-20 | 신재식 | Waterproof tube for cable connecter |
| CN210468759U (en) * | 2019-10-23 | 2020-05-05 | 国网电力科学研究院武汉南瑞有限责任公司 | Power cable sealing device |
Non-Patent Citations (1)
| Title |
|---|
| 张建新;: "10以下电力电缆故障分类及测试方法", 中国战略新兴产业, no. 12, 7 March 2018 (2018-03-07), pages 186 * |
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