CN213846205U - Diversion arc-extinguishing type cable intermediate joint - Google Patents
Diversion arc-extinguishing type cable intermediate joint Download PDFInfo
- Publication number
- CN213846205U CN213846205U CN202022384634.5U CN202022384634U CN213846205U CN 213846205 U CN213846205 U CN 213846205U CN 202022384634 U CN202022384634 U CN 202022384634U CN 213846205 U CN213846205 U CN 213846205U
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- outer protective
- cable
- intermediate joint
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- 239000002184 metal Substances 0.000 claims abstract description 50
- 229910052751 metal Inorganic materials 0.000 claims abstract description 50
- 230000001681 protective effect Effects 0.000 claims abstract description 37
- 239000003063 flame retardant Substances 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 21
- 238000004880 explosion Methods 0.000 abstract description 11
- 230000006378 damage Effects 0.000 abstract description 7
- 239000002344 surface layer Substances 0.000 abstract description 4
- 238000010891 electric arc Methods 0.000 abstract description 3
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 239000006004 Quartz sand Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003574 free electron Substances 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- XJKVPKYVPCWHFO-UHFFFAOYSA-N silicon;hydrate Chemical compound O.[Si] XJKVPKYVPCWHFO-UHFFFAOYSA-N 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
A pilot arc suppressing cable intermediate joint, comprising: an intermediate joint body; the metal flow guide layer is arranged on the outer surface of the middle connector body and is respectively connected with the metal shielding layers of the cables on the two sides of the middle connector body, and cable channels allowing the cables to pass through are formed in the two ends of the metal flow guide layer; and the outer protective shell is arranged on the outer side of the metal flow guide layer, and two sides of the outer protective shell are respectively connected with the metal flow guide layer for preventing the internal impact. The embodiment of the utility model provides a puncture passageway electric arc length can be reduced through metal water conservancy diversion layer, reduces length from original sinle silk to the outer protective housing for sinle silk to the inner surface layer on metal water conservancy diversion layer to metal shielding layer through connecting the metal water conservancy diversion layer to the both sides cable can be with short-circuit current ground connection, makes the energy value that plasma gathered reduce, the effectual damage that has reduced. Can block explosion power through the outer protective housing, reduce and even avoid the injury to external equipment.
Description
Technical Field
The utility model belongs to high voltage power cable field, concretely relates to water conservancy diversion arc extinguishing type cable intermediate head.
Background
In recent years, the cabling application of urban power transmission and distribution lines in China has become a remarkable development trend, the cable intermediate connector is widely applied to the connection between cables in a power transmission system, the cable intermediate connector body is generally prefabricated and molded in a factory, the quality is easy to control, and the fault probability is low.
However, the field installation environment of the intermediate joint is complex and changeable, the overall quality of the joint is affected by various factors such as installation conditions, processes, materials and the quality of installation personnel, and the intermediate joint becomes a weak link of a cable line. In a tunnel for laying cables, due to the fact that space is narrow, barriers are multiple, combustibles in the cables are complex, the cables are dense, ventilation is poor, once an intermediate joint is broken down or exploded, a fire disaster is easily caused, high-temperature dense smoke is accumulated after fire is caught, a large amount of harmful gas is released, great difficulty is brought to fire extinguishing work, and the cables in a large area are easily damaged.
Traditional cable intermediate head protective housing adopts the structure of metal, realizes functions such as cable metallic shield resumes, metallic shield layer ground connection and explosion impact protection simultaneously, when the breakdown takes place, can't resist the high temperature impact of explosion, has taken place melting of casing even and has worn, can't effectively resist the explosion, more can't put out a fire. This is because when the cable intermediate head broke down the explosion, along with a large amount of material conversion and energy change, the pyrolysis and thermal ionization can take place for intermediate head insulation and cable insulation material, form high temperature high pressure plasma, and when the copper casing was as earthing terminal and protective housing simultaneously, high temperature plasma can directly impact on the copper casing wall, and the copper casing welds in the twinkling of an eye, and intensity is invalid, can't resist the impact of high temperature high pressure plasma, then the explosion is fired.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a water conservancy diversion arc extinguishing type cable intermediate head, water conservancy diversion arc extinguishing type cable intermediate head's simple structure has solved the problem that cable intermediate head easily causes the conflagration when taking place to puncture.
According to the utility model discloses water conservancy diversion arc extinguishing type cable intermediate head, include: an intermediate joint body; the metal flow guide layer is arranged on the outer surface of the middle connector body and is respectively connected with the metal shielding layers of the cables on the two sides of the middle connector body, and cable channels allowing the cables to pass through are formed in the two ends of the metal flow guide layer; and the outer protective shell is arranged on the outer side of the metal flow guide layer, and two sides of the outer protective shell are respectively connected with the metal flow guide layer and used for preventing the internal impact.
According to the utility model discloses water conservancy diversion arc extinguishing type cable intermediate head has following technological effect at least: can reduce puncture passageway electric arc length through the metal water conservancy diversion layer, reduce the length from original sinle silk to the outer protective housing for the sinle silk to the inner surface layer on metal water conservancy diversion layer to can be with short-circuit current ground connection through the metal shielding layer of connecting the metal water conservancy diversion layer to the cable of both sides, make the energy value that plasma gathers reduce, the effectual damage that has reduced. Can block explosion power through the outer protective housing, reduce and even avoid the injury to external equipment.
According to some embodiments of the utility model, the metal water conservancy diversion layer adopts lead belt, copper strips, the mixed winding of copper mesh to form.
According to some embodiments of the utility model, above-mentioned water conservancy diversion arc extinguishing type cable intermediate head still including set up in the fire-retardant layer of metal water conservancy diversion layer surface.
According to some embodiments of the invention, the fire retardant layer is a fire retardant tape and/or a fire retardant heat shrink tube.
According to some embodiments of the present invention, the outer protective shell includes a left shell and a right shell and an insulating coupling assembly for connecting the left shell and the right shell.
According to some embodiments of the utility model, above-mentioned water conservancy diversion arc extinguishing type cable intermediate head still includes all there is the relief valve that sets up on left side casing and the right casing, the relief valve is used for the release atmospheric pressure in the outer protective housing.
According to some embodiments of the utility model, the relief valve all is provided with a plurality ofly on left side casing and the right casing.
According to some embodiments of the present invention, the metal flow guiding layer and the outer protective shell are filled with quartz sand.
According to some embodiments of the utility model, the inboard of outer protective housing is provided with the insulating inner bag layer of high strength.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a front view of an embodiment of the present invention;
fig. 2 is a longitudinal cross-sectional view of an embodiment of the invention;
fig. 3 is a transverse cross-sectional view of an embodiment of the invention.
Reference numerals:
an intermediate joint body 100,
A metal flow guide layer 200,
An outer protective shell 300, a left shell 310, a right shell 320, an insulation connecting component 330,
344, a pressure relief hole 345,
A cable 400,
And 500 of quartz sand.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, if there are first, second, third, fourth, etc. described, it is only for the purpose of distinguishing technical features, and it is not understood that relative importance is indicated or implied or that the number of indicated technical features is implicitly indicated or that the precedence of the indicated technical features is implicitly indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.
A flow guiding extinction type cable intermediate joint according to an embodiment of the present invention is described below with reference to fig. 1 to 3.
According to the utility model discloses water conservancy diversion arc extinguishing type cable intermediate head, include: the middle joint comprises a middle joint body 100, a metal flow guide layer 200 and an outer protective shell 300. An intermediate joint body 100; a metal current guiding layer 200 disposed on an outer surface of the intermediate connector body 100 and connected to the metal shielding layers of the cables 400 at both sides of the intermediate connector body 100, respectively, wherein both ends of the metal current guiding layer 200 have cable passages for allowing the cables 400 to pass therethrough; the outer protective case 300 is disposed outside the metal current guiding layer 200, and both sides of the outer protective case are connected to the metal current guiding layer 200, respectively, for preventing internal impact.
Referring to fig. 1 to 3, the metal current guiding layer 200 is overlapped from the cable middle connector body 100 to the metal shielding layer of the cable 400 on both sides, and is further connected to the grounding cable through the metal shielding layer, so as to achieve grounding. When the intermediate joint body 100 or the cable 400 is broken down, an arc breakdown channel of the traditional cable intermediate joint protective shell is from the wire core to the inner surface of the outer protective shell 300, and after improvement, the arc length of the breakdown channel can be reduced to be from the wire core to the inner surface layer of the metal current guiding layer 200; and the short-circuit current is grounded through the metal shielding layer, so that the energy value accumulated by the plasma is reduced.
The outer shield 300 is the last barrier to shock, and after being guided by the metal guiding layer 200, can reduce the impact of a portion of the plasma, but it is difficult to absorb all the shock. The impact of the high-pressure plasma can be further blocked by the outer protective shell 300, and further, the impact and damage of fine substances generated in breakdown and explosion on external equipment can be effectively avoided.
It should be noted that the cables 400 on both sides of the intermediate connector body 100 are usually connected together by copper connecting tubes, pressure equalizing sleeves and spring hoops.
According to the utility model discloses water conservancy diversion arc extinguishing type cable intermediate head can reduce puncture passageway electric arc length through metal water conservancy diversion layer 200, reduces the length from original sinle silk to outer protective housing 300 for the sinle silk to the inner surface layer of metal water conservancy diversion layer 200 to the metal shielding layer through being connected to metal water conservancy diversion layer 200 to both sides cable 400 can be with short-circuit current ground connection, makes the energy value that plasma gathered reduce, the effectual damage that has reduced. Explosion power can be blocked through the outer protective shell 300, and damage to external equipment is reduced or even avoided.
In some embodiments of the present invention, the metal current guiding layer 200 is formed by a mixture of lead tape, copper tape and copper mesh. The material formed by the mixed lapping and weaving has good hardness and conductivity, and can directly lead the short-circuit current to the metal shielding layer of the cable 400, so that the short-circuit current is led to the ground, and the magnitude of energy gathering is effectively reduced.
In some embodiments of the present invention, the diversion arc extinguishing type cable intermediate joint further includes a flame retardant layer disposed on the outer surface of the metal diversion layer 200. Can keep apart cable 400 and outside air through fire-retardant layer, prevent that inside from catching a fire the utility model discloses an in some embodiments, fire-retardant layer adopts back-fire relief area and/or fire-retardant pyrocondensation pipe. The fire retardant belt and the flame-retardant heat shrinkable tube are common flame-retardant materials, and are low in price and suitable for large-batch use.
In some embodiments of the present invention, referring to fig. 1 and 2, the outer protective shell 300 includes a left shell 310 and a right shell 320, and an insulating connection assembly 330 for connecting the left shell 310 and the right shell 320. The left housing 310 and the right housing 320 can be connected together by the insulating connection assembly 330, and direct electrical connection between the left housing 310 and the right housing 320 can be avoided, so that the left housing 310 and the right housing 320 can be grounded respectively. In addition, for the through cable joint, the outer protective shell 300 may include the left shell 310 and the right shell 320, and the insulating connection component 330 is not required to separate the left shell 310 from the right shell 320, and the insulating connection component 330 may be used only in the insulating type cable middle joint.
In some embodiments of the present invention, referring to fig. 1-3, the insulating connection assembly 330 includes an insulator and a connection bolt. The left shell 310 and the right shell 320 are provided with first connecting through holes on one side which is required to be connected with the insulating part, the insulating part is provided with second connecting through holes corresponding to the connecting through holes on the left shell 310 and the right shell 320, and the first connecting through holes and the second connecting through holes are fixed through connecting bolts.
In some embodiments of the present invention, the main structure of the left housing 310 and the right housing 320 can be copper shells, which have better conductivity and certain hardness, and can play the role of grounding diversion and preventing explosion impact. The outer surfaces of the left and right cases 310 and 320 are also typically provided with an insulating layer, by which the insulating properties of the left and right cases 310 and 320 can be improved.
In some embodiments of the present invention, referring to fig. 1 to 3, the diversion arc extinguishing type cable intermediate joint further includes a pressure release valve 340 disposed on each of the left casing 310 and the right casing 320, and the pressure release valve 340 is used for releasing the air pressure in the outer protection casing 300. When an explosion occurs, the high-pressure gas can be released through the pressure relief valve 340, so that the influence of internal impact is reduced or avoided.
In some embodiments of the present invention, referring to fig. 3, the pressure relief valve 340 includes a lower flange 341, an upper flange 342, a sealing ring 343, and a rupture disk safety device 344. The lower flange 341 is connected to the outer protective case 300 and communicates with the inside of the outer protective case 300, the upper flange 342 and the lower flange 341 are connected by bolts, and the upper flange 342 and the lower flange 341 are sealed by a sealing ring 343. A pressure relief hole 345 is formed in the middle of the lower flange 341, and the rupture disc safety device 344 is clamped inside the pressure relief hole 345 of the lower flange 341. When the pressure in the outer protective shell 300 is too high, it will impact and break the rupture disk safety device 344, thereby completing the pressure relief through the pressure relief hole 345. The rupture disc safety device 344 has the advantages of low cost, sensitive action, large discharge area, simple maintenance, etc., compared with a spring-type safety valve.
In some embodiments of the present invention, referring to fig. 1 to 3, the pressure relief valve 340 is provided in plurality on both the left housing 310 and the right housing 320. The pressure relief speed can be increased by arranging the pressure relief valves 340340, and the reaction can be more convenient.
In some embodiments of the present invention, the inner side of the outer protective shell 300 is provided with a high-strength insulating inner container layer. The high-strength insulating inner container layer is made of a material with high strength and good insulating property, so that short-circuit current can be prevented from directly melting the outer protective shell 300 as a grounding end on one hand, and impact of high-voltage plasma can be blocked on the other hand.
In some embodiments of the present invention, referring to fig. 1 and 3, the quartz sand 500 is filled between the metal flow guiding layer 200 and the outer protective shell 300. After the quartz sand 500 is filled, after breakdown occurs, the formed high-temperature plasma with carbon, hydrogen and free electrons as main components is firstly combined with the quartz sand 500 to generate silicon carbide and water with stable chemical properties, so that the impact of the plasma on the protective shell 300 is effectively prevented.
In some embodiments of the present invention, the quartz sand 500 is used in a size of 40 to 70 mesh. The quartz sand 500 of 40 to 70 mesh can be better combined with high temperature plasma having carbon, hydrogen and free electrons as main components.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and those skilled in the art can understand that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. A flow-guiding arc-extinguishing type cable intermediate joint is characterized by comprising:
an intermediate joint body (100);
the metal flow guiding layer (200) is arranged on the outer surface of the middle connector body (100) and is respectively connected with the metal shielding layers of the cables (400) on two sides of the middle connector body (100), and two ends of the metal flow guiding layer (200) are provided with cable channels allowing the cables (400) to pass through;
and the outer protective shell (300) is arranged on the outer side of the metal flow guide layer (200), and two sides of the outer protective shell are respectively connected with the metal flow guide layer (200) and used for preventing internal impact.
2. The intermediate joint of the diversion arc extinguishing type cable according to claim 1, wherein the metal diversion layer (200) is formed by wrapping a mixture of lead strips, copper strips and copper meshes.
3. The intermediate joint of a deflector-type arc-extinguishing cable according to claim 1, further comprising a flame-retardant layer disposed on an outer surface of the metal deflector layer (200).
4. The flow-guiding and arc-extinguishing type cable intermediate joint according to claim 3, wherein the flame-retardant layer is made of a fire-retardant tape and/or a flame-retardant heat-shrinkable tube.
5. The medium cable joint of the pilot arc type according to claim 1, wherein the outer protective case (300) comprises left and right cases (310, 320), and an insulating connection assembly (330) for connecting the left and right cases (310, 320).
6. The medium joint of a diversion extinguishing type cable according to claim 5, further comprising a pressure relief valve (340) provided on each of said left housing (310) and said right housing (320), said pressure relief valve (340) being configured to release air pressure inside said outer protective housing (300).
7. The medium cable joint of the pilot quenching type according to claim 6, wherein the pressure relief valve (340) is provided in plurality on both the left housing (310) and the right housing (320).
8. The medium joint of a current guiding and arc extinguishing type cable according to claim 1, wherein the inner side of the outer protective shell (300) is provided with a high strength insulating inner container layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022384634.5U CN213846205U (en) | 2020-10-23 | 2020-10-23 | Diversion arc-extinguishing type cable intermediate joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022384634.5U CN213846205U (en) | 2020-10-23 | 2020-10-23 | Diversion arc-extinguishing type cable intermediate joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213846205U true CN213846205U (en) | 2021-07-30 |
Family
ID=77010987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022384634.5U Active CN213846205U (en) | 2020-10-23 | 2020-10-23 | Diversion arc-extinguishing type cable intermediate joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213846205U (en) |
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2020
- 2020-10-23 CN CN202022384634.5U patent/CN213846205U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 410000 No. 223, tongzipo West Road, Lugu Industrial Park, high tech Development Zone, Changsha, Hunan Patentee after: Long Cable Technology Group Co.,Ltd. Country or region after: China Address before: No.223, tongzipo West Road, Lugu Industrial Park, high tech Development Zone, Changsha City, Hunan Province, 410205 Patentee before: CHANGLAN CABLE ACCESSORIES Co.,Ltd. Country or region before: China |