CN111256922B - Cable oversheath nitrogen gas detection device - Google Patents
Cable oversheath nitrogen gas detection device Download PDFInfo
- Publication number
- CN111256922B CN111256922B CN202010192345.7A CN202010192345A CN111256922B CN 111256922 B CN111256922 B CN 111256922B CN 202010192345 A CN202010192345 A CN 202010192345A CN 111256922 B CN111256922 B CN 111256922B
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- CN
- China
- Prior art keywords
- cable
- sealing cover
- detection device
- terminal sealing
- barometer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 238000001514 detection method Methods 0.000 title claims abstract description 18
- 229910001873 dinitrogen Inorganic materials 0.000 title claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 7
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 abstract description 9
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007127 saponification reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012956 testing procedure Methods 0.000 description 1
Images
Classifications
-
- 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
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2838—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for cables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Testing Relating To Insulation (AREA)
Abstract
A cable outer sheath nitrogen gas detection device relates to the field of power equipment and comprises a nitrogen gas bottle, wherein a first barometer and a control valve are installed on the nitrogen gas bottle, the control valve is connected with an air guide pipe, the air guide pipe is connected with a front cable terminal sealing cover, the front cable terminal sealing cover is connected with a connector sleeve, the connector sleeve is sleeved at one end of a cable, a sealing hoop is arranged on the connector sleeve, the other end of the cable is fixed in a rear cable terminal sealing cover through the connector sleeve, and a second barometer is arranged in the front cable terminal sealing cover; and a third barometer is arranged in the rear cable terminal sealing cover. The invention can realize the search of the damaged place of the cable outer sheath and timely block to prevent the cable fault caused by insulation damage, and solves the problem that no effective monitoring means for the operation condition of the high-voltage cable exists at present.
Description
Technical Field
The invention relates to the field of operation and maintenance of power cables, in particular to a nitrogen detection device for a cable outer sheath.
Background
The cable outer sheath plays a role in protection and insulation. On one hand, because the cable laying environment is often accompanied with moisture, corrosive substances and the like, if the outer sheath is damaged, the outer sheath positioned on the outer layer of the cable can protect the corrugated aluminum sheath from being corroded by surrounding cable substances, so that the main insulation of the cable is prevented from being endangered until the insulation is broken down, and accidents occur. In addition, the damage of the outer sheath can lead the corrugated aluminum sheath to generate multipoint grounding, the electromagnetic induction of conductor current in the running process leads the circulation of the metal sheath of the cable to be increased, and the transmission capacity of a cable line is reduced.
Because no effective monitoring means for the running condition of the high-voltage cable exists at present, the evaluation of the state of the outer sheath of the cable actually becomes an important index for the evaluation of the running condition of the cable. Current preventive testing procedures set strict standards for cable jacket insulation tests. According to the requirement of power cable laying construction, the underground laying of the power cable strictly prohibits the water inlet of the outer sheath, and the cable outer sheath plays a role in protecting the main insulation of the power cable. In the operation and maintenance work of power cables laid in the ground, the phenomenon that the outer sheath of the cable is subjected to water inflow due to the limitation of construction process and plugging materials is found to be common. The main reason why 60% of power cable accidents caused by faults in 2018 are caused by the fact that the insulation of a main insulating material is reduced due to water entering the outer sheath of the cable, so that the cable is broken down.
Disclosure of Invention
Aiming at the problem that no effective monitoring means for the operation condition of the high-voltage cable exists at present, the invention provides the cable outer sheath nitrogen detection device, which avoids accidents caused by insulation reduction of the power cable due to water inflow of the outer sheath.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a cable outer sheath nitrogen gas detection device comprises a pressure detection assembly, wherein the pressure detection assembly comprises a nitrogen cylinder, a first barometer and a control valve are mounted on the nitrogen cylinder, the control valve is connected with an air guide pipe, the air guide pipe is connected with a front cable terminal sealing cover, the front cable terminal sealing cover is connected with a connector sleeve, the connector sleeve is sleeved at one end of a cable, a sealing hoop is arranged on the connector sleeve, the other end of the cable is fixed in a rear cable terminal sealing cover through the connector sleeve, and a second barometer is arranged in the front cable terminal sealing cover; and a third barometer is arranged in the rear cable terminal sealing cover.
Furthermore, a horizontal moving mechanism is arranged below the cable.
Further, the horizontal movement mechanism comprises a slide rail, a slide block is mounted on the slide rail, and a water tank is mounted on the slide block.
Further, horizontal migration mechanism includes front truck and after-poppet, it is connected with the action wheel to rotate on the front truck, it is connected with from the driving wheel to rotate on the after-poppet, the action wheel is connected through the hold-in range with from between the driving wheel, the action wheel is connected with driving motor, install the water tank on the hold-in range.
Furthermore, a submersible pump is arranged in the water tank and connected with a water pipe, the water pipe penetrates through a through hole in the top of the water tank and then is connected with an annular liquid spraying ring, and a plurality of water spraying pipes are arranged on the inner wall of the annular liquid spraying ring.
Furthermore, a bracket is arranged at the lower end of the joint sleeve.
Further, the bracket comprises a base, a supporting rod is installed on the base, and an arc-shaped bracket is arranged on the supporting rod.
Furthermore, the bracing piece includes outer tube, interior pole and knob bolt, the outer tube coupling has the base, and sliding fit has an interior pole in the outer tube, the knob bolt makes interior pole remove and be located the outer tube on one along the outer tube inner wall.
Furthermore, a screwing handle is arranged on the sealing hoop.
The invention has the beneficial effects that: the invention can realize the search of the damaged place of the cable outer sheath and timely block to prevent the cable fault caused by insulation damage, and solves the problem that no effective monitoring means for the operation condition of the high-voltage cable exists at present.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the water tank;
FIG. 3 is a schematic structural view of a bracket;
fig. 4 is a schematic structural view of a second embodiment of the horizontal movement mechanism.
In the figure: 1 pressure detecting component, 11 nitrogen gas bottle, 12 first barometer, 13 control valve, 14 air duct, 15 front cable terminal sealing cover, 16 second barometer, 17 joint sleeve, 18 sealing hoop, 19 tightening handle, 110 rear cable terminal sealing cover, 111 third barometer,
2 bracket, 21 base, 22 support rod, 23 bracket,
3 horizontal moving mechanism, 31 slide rail, 32 slide block, 33 water tank, 34 diving pump, water pipe 35, annular liquid spraying ring 36, water spraying pipe 37, through hole 38, 39 front frame, 310 rear frame, 311 driving wheel, 312 driven wheel, 313 synchronous belt, 314 driving motor, 4 cable.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
As shown in fig. 1 to 3, a cable oversheath nitrogen gas detection device, including a pressure measurement subassembly 1, the pressure measurement subassembly includes a nitrogen cylinder 11, install first barometer 12 and control valve 13 on the nitrogen cylinder, the control valve is connected with air duct 14, air duct 14 is connected with preceding cable terminal head sealed cowling 15, preceding cable terminal head sealed cowling 15 is connected with joint cover 17, the joint cover is in the one end of cable 4 for the cable head is in preceding cable terminal head sealed cowling. The connector sleeve is provided with a sealing hoop 18, the sealing hoop 18 is provided with a screwing handle 19, and meanwhile, the other end of the cable is fixed in the rear cable terminal sealing cover 110 through the connector sleeve 17.
Wherein, a second barometer 16 is arranged in the front cable terminal sealing cover; and a third barometer 111 is arranged in the rear cable terminal sealing cover.
In the working mode, the cable 4 is firstly detached, and the cover of the suspected place is cleaned. When in use, the front cable terminal sealing cover and the rear cable terminal sealing cover are respectively arranged at two ends of the cable 4. After the cable terminal is inserted into the front cable terminal sealing cover and the rear cable terminal sealing cover, the cable terminal is sealed by the sealing hoop 18 to prevent air leakage. Connecting a nitrogen cylinder 11 to a front cable terminal sealing cover through an air duct 14, starting a control valve 13 to check a first barometer, wherein the indication of the first barometer is 0.5Mpa, respectively observing a second barometer 16 and a third barometer 111, and if the second barometer 16 and the first barometer indicate low, a leak source is positioned at a cable end close to the second barometer, otherwise, the leak source is positioned at a cable end close to the first barometer. When the saponification agent spray gun is used for searching, the saponification agent is uniformly sprayed on the surface of the outer sheath of the cable in a sticking mode, the damaged point of the outer sheath of the cable can generate air leakage and bubbling, and the mark is made for timely repairing after the damaged point of the outer sheath of the cable is found.
Alternatively, a horizontal movement mechanism 3 is provided below the cable. The horizontal moving mechanism comprises a slide rail 31, a slide block 32 is installed on the slide rail, and a water tank 33 is installed on the slide block.
Referring to fig. 4, another embodiment of the horizontal movement mechanism is shown. The horizontal moving mechanism comprises a front frame 39 and a rear frame 310, a driving wheel 311 is connected to the front frame in a rotating mode, a driven wheel 312 is connected to the rear frame in a rotating mode, and the driving wheel and the driven wheel are connected through a synchronous belt 313. The driving wheel is connected with a driving motor 314, and a water tank 33 is arranged on the synchronous belt.
Referring to fig. 2, a submersible pump 34 is arranged in the water tank, the submersible pump is connected with a water pipe 35, the water pipe penetrates through a through hole 38 in the top of the water tank and is connected with an annular liquid spraying ring 36, and a plurality of water spraying pipes 37 are arranged on the inner wall of the annular liquid spraying ring. The water tank is pushed manually by people to move along the sliding rail, so that automatic water spraying can be realized, and the saponifying agent is uniformly sprayed on the surface of the cable outer sheath.
Further optimize technical scheme, the joint cover lower extreme is equipped with a bracket 2.
The bracket comprises a base 21, a support rod 22 is installed on the base, and an arc-shaped bracket 23 is arranged on the support rod.
The scheme refines, the bracing piece is scalable regulation formula, the bracing piece includes outer tube, interior pole and knob bolt, outer union coupling has the base, and sliding fit has an interior pole in the outer tube, the knob bolt can make interior pole remove and be located an outer tube department along the outer tube inner wall.
In addition to the technical features described in the specification, the technology is known to those skilled in the art.
Claims (7)
1. The cable outer sheath nitrogen detection device is characterized by comprising a pressure detection assembly, wherein the pressure detection assembly comprises a nitrogen cylinder, a first barometer and a control valve are mounted on the nitrogen cylinder, the control valve is connected with an air guide pipe, the air guide pipe is connected with a front cable terminal sealing cover, the front cable terminal sealing cover is connected with a connector sleeve, the connector sleeve is sleeved at one end of a cable, a sealing hoop is arranged on the connector sleeve, the other end of the cable is fixed in a rear cable terminal sealing cover through the connector sleeve, and a second barometer is arranged in the front cable terminal sealing cover; a third barometer is arranged in the rear cable terminal sealing cover; the cable is characterized in that a horizontal moving mechanism is arranged below the cable, a water tank is arranged on the horizontal moving mechanism, a submersible pump is arranged in the water tank and connected with a water pipe, the water pipe penetrates through a through hole in the top of the water tank and then is connected with an annular liquid spraying ring, and a plurality of water spraying pipes are arranged on the inner wall of the annular liquid spraying ring.
2. The cable outer sheath nitrogen gas detection device according to claim 1, wherein the horizontal movement mechanism comprises a slide rail, a slide block is mounted on the slide rail, and a water tank is mounted on the slide block.
3. The nitrogen detection device for the outer sheath of the cable as claimed in claim 1, wherein the horizontal movement mechanism comprises a front frame and a rear frame, a driving wheel is rotatably connected to the front frame, a driven wheel is rotatably connected to the rear frame, the driving wheel and the driven wheel are connected through a synchronous belt, the driving wheel is connected with a driving motor, and a water tank is mounted on the synchronous belt.
4. The cable jacket nitrogen detection device of claim 1, wherein a bracket is provided at a lower end of the connector housing.
5. The cable jacket nitrogen detection device of claim 4, wherein the bracket comprises a base, the base is provided with a support rod, and the support rod is provided with an arc-shaped bracket.
6. The cable outer sheath nitrogen detection device of claim 5, wherein the support rod comprises an outer tube, an inner rod and a knob bolt, the outer tube is connected with the base, the inner rod is in sliding fit with the outer tube, and the knob bolt enables the inner rod to move along the inner wall of the outer tube and be positioned at one position on the outer tube.
7. The nitrogen gas detection device for the outer sheath of the cable according to claim 1, wherein a screwing handle is arranged on the sealing hoop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010192345.7A CN111256922B (en) | 2020-03-18 | 2020-03-18 | Cable oversheath nitrogen gas detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010192345.7A CN111256922B (en) | 2020-03-18 | 2020-03-18 | Cable oversheath nitrogen gas detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111256922A CN111256922A (en) | 2020-06-09 |
| CN111256922B true CN111256922B (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010192345.7A Expired - Fee Related CN111256922B (en) | 2020-03-18 | 2020-03-18 | Cable oversheath nitrogen gas detection device |
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| CN (1) | CN111256922B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018670B (en) * | 2020-07-20 | 2021-09-28 | 国家电网有限公司 | Dual-purpose device for disassembling T-shaped terminal of cable |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011045170A1 (en) * | 2009-10-14 | 2011-04-21 | Contitech Schlauch Gmbh | Device and method for detecting insulation faults of a cable |
| CN202082629U (en) * | 2011-04-06 | 2011-12-21 | 黄定军 | Natural gas pipeline leakage monitoring system |
| CN102353503A (en) * | 2011-07-06 | 2012-02-15 | 浙江晨光电缆股份有限公司 | Device for fast air-charging test of high-voltage cable |
| CN204255589U (en) * | 2014-11-27 | 2015-04-08 | 河北新宝丰电线电缆有限公司 | Cable metal cover leak tightness test device |
| CN204479246U (en) * | 2015-03-16 | 2015-07-15 | 远东电缆有限公司 | A kind of high-tension cable tightness test device |
| CN206378258U (en) * | 2017-01-14 | 2017-08-04 | 中山市三浦金属制品有限公司 | Soldering stainless steel coil pipe Automatic Leakage |
-
2020
- 2020-03-18 CN CN202010192345.7A patent/CN111256922B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011045170A1 (en) * | 2009-10-14 | 2011-04-21 | Contitech Schlauch Gmbh | Device and method for detecting insulation faults of a cable |
| CN202082629U (en) * | 2011-04-06 | 2011-12-21 | 黄定军 | Natural gas pipeline leakage monitoring system |
| CN102353503A (en) * | 2011-07-06 | 2012-02-15 | 浙江晨光电缆股份有限公司 | Device for fast air-charging test of high-voltage cable |
| CN204255589U (en) * | 2014-11-27 | 2015-04-08 | 河北新宝丰电线电缆有限公司 | Cable metal cover leak tightness test device |
| CN204479246U (en) * | 2015-03-16 | 2015-07-15 | 远东电缆有限公司 | A kind of high-tension cable tightness test device |
| CN206378258U (en) * | 2017-01-14 | 2017-08-04 | 中山市三浦金属制品有限公司 | Soldering stainless steel coil pipe Automatic Leakage |
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| CN111256922A (en) | 2020-06-09 |
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