CN213846216U - Fireproof flame-proof type cable intermediate joint - Google Patents
Fireproof flame-proof type cable intermediate joint Download PDFInfo
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- CN213846216U CN213846216U CN202022381944.1U CN202022381944U CN213846216U CN 213846216 U CN213846216 U CN 213846216U CN 202022381944 U CN202022381944 U CN 202022381944U CN 213846216 U CN213846216 U CN 213846216U
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- 239000002184 metal Substances 0.000 claims abstract description 75
- 229910052751 metal Inorganic materials 0.000 claims abstract description 75
- 230000001681 protective effect Effects 0.000 claims abstract description 35
- 238000004880 explosion Methods 0.000 claims abstract description 17
- 230000006378 damage Effects 0.000 claims abstract description 11
- 239000002360 explosive Substances 0.000 claims abstract description 5
- 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
- 239000006004 Quartz sand Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 9
- 230000002265 prevention Effects 0.000 claims description 9
- 229920006231 aramid fiber Polymers 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000010891 electric arc Methods 0.000 abstract description 3
- 239000000872 buffer Substances 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 70
- 239000007789 gas Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 230000015556 catabolic process Effects 0.000 description 6
- 239000003063 flame retardant Substances 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000009434 installation Methods 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
- 239000004744 fabric Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000003574 free electron Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009413 insulation Methods 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
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 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
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Abstract
A fire-proof flame-proof type cable intermediate head comprises: 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; 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 internal impact; and the filling layer is arranged between the metal flow guide layer and the outer protective shell and is used for absorbing heat generated by internal explosives. The embodiment of the utility model provides a puncture passageway electric arc length can be dwindled through metal water conservancy diversion layer for the energy value that plasma gathered reduces, the effectual damage that has reduced. Can effectual lowering the temperature through the filling layer, play the effect of putting out a fire, can also reduce the impact of explosion to the external protective housing simultaneously. Explosion power after the filling layer buffers can be blocked through the outer protective shell, and damage to external equipment is reduced or even avoided.
Description
Technical Field
The utility model belongs to high voltage power cable field, concretely relates to fire prevention flame-proof 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 fire prevention flame-proof type cable intermediate head, fire prevention flame-proof type cable intermediate head's simple structure has solved the problem that cable intermediate head can not explosion-proof put out a fire.
According to the utility model discloses fire prevention flame-proof 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; 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 internal impact; and the filling layer is arranged between the metal flow guide layer and the outer protective shell and is used for absorbing heat generated by internal explosives.
According to the utility model discloses fire prevention flame-proof 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. The heat generated by the plasma can be absorbed through the filling layer, the temperature level is effectively reduced, and the possibility of fire is reduced; meanwhile, the filling layer can effectively reduce the impact of the plasma on the outer protective shell. Explosion power after the filling layer buffers can be blocked through the outer protective shell, and damage to external equipment is reduced or even avoided.
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 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 present invention, the left casing and the right casing all include: the high-strength insulating inner container layer is arranged on the outer surface of the filling layer; the metal shell is arranged on the outer surface of the high-strength insulating inner container layer and is connected with the metal guide layer; and the insulating layer is arranged on the outer surface of the metal shell.
According to some embodiments of the utility model, above-mentioned fire prevention flame-proof type cable intermediate head still including set up in last relief valve of metal casing, the relief valve is used for the release atmospheric pressure in the metal casing.
According to some embodiments of the utility model, be provided with the screen cloth in the relief valve, the screen cloth is used for reducing the piece that brings out when inside explosion and to the damage of external equipment.
According to some embodiments of the utility model, be provided with gaseous extinguishing device in the relief valve.
According to some embodiments of the invention, the pressure relief valve is a plurality of.
According to some embodiments of the utility model, the insulating inner bag layer of high strength adopts glass fiber inner bag or aramid fiber combined material inner bag.
According to some embodiments of the utility model, the filling layer adopts quartz sand.
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;
fig. 4 is an enlarged schematic view of a portion a of fig. 3.
Reference numerals:
an intermediate joint body 100,
A metal flow guide layer 200,
The high-strength high-pressure explosion-proof inner container comprises an outer protective shell 300, a high-strength insulating inner container layer 301, a metal shell 302, an insulating layer 303, a left shell 310, a right shell 320, an insulating connecting assembly 330, a pressure release valve 340, a screen 341, a gas fire extinguishing device 342, a lower flange 343, an upper flange 344, a sealing ring 345, a rupture disk safety device 346, a pressure release hole 347, a pressure release cover 320, a pressure release cover, a pressure release spring, and a pressure release spring, a pressure release spring, and a pressure release, a pressure release pressure, and a pressure release, and a pressure, a pressure release, and a pressure release pressure, a pressure release, and a pressure, and a pressure release pressure, a pressure release, a pressure,
A filling layer 400,
A cable 500.
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.
The following describes a fireproof flame-proof type cable intermediate joint according to an embodiment of the present invention with reference to fig. 1 to 4.
According to the utility model discloses fire prevention flame-proof type cable intermediate head, include: the middle joint comprises a middle joint body 100, a metal flow guide layer 200, an outer protective shell 300 and a filling layer 400. 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 500 on 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 500 to pass therethrough; an outer protective case 300 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; the filling layer 400 is disposed between the metal current guiding layer 200 and the outer protective shell 300, and is used for absorbing heat generated by internal explosives.
Referring to fig. 1 to 4, the metal current guiding layer 200 is overlapped from the middle joint body 100 to the metal shielding layer of the cable 500 on both sides, and is connected to the grounding cable through the metal shielding layer, so as to achieve grounding. When the intermediate joint body 100 or the cable 500 is broken down, an arc breakdown channel of the conventional 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 filling layer 400 mainly absorbs the energy generated by the explosive inside, lowers the temperature, further reduces and prevents the impact of the plasma on the protective shell 300, and can indirectly perform the function of extinguishing the fire. When breakdown occurs, the plasma effectively reduces the amount of plasma by combining with the species in the fill layer 400.
The protective outer shell 300 is the last barrier and still does not completely eliminate the effects of puncture and explosion after being stopped by the filler layer 400. The impact of the high-pressure plasma can be blocked by the outer protective shell 300, and the impact of the filler in the filling layer 400 can be prevented from damaging external devices. In some embodiments of the utility model, the both ends of outer protective housing 300 still are provided with back-fire relief belting layer and lead sealing layer, can effectually prevent the appearance of condition of a fire.
It should be noted that the cables 500 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 fire prevention flame-proof type cable intermediate head can reduce puncture passageway electric arc length through metal current guiding layer 200, reduces the length from original sinle silk to outer protective housing 300 for sinle silk to the inner layer of metal current guiding layer 200 to metal shielding layer through being connected to metal current guiding layer 200 can be with short-circuit current ground connection, make the energy value that plasma gathers reduce, the effectual damage that has reduced. The heat generated by the plasma can be absorbed through the filling layer 400, so that the temperature level is effectively reduced, and the possibility of fire is reduced; meanwhile, the filling layer 400 may also effectively reduce the impact of the plasma on the outer protective shell 300. The outer protective shell 300 can block the explosion power of the filling layer 400 after buffering, and the 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 500, 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 outer surface of the metal flow guiding layer 200 is further provided with a fire retardant belt and a fire retardant heat shrinkable tube. The fire retardant tape and the fire retardant heat shrink tube may isolate the cable 500 from the outside air, preventing the inside from firing.
In some embodiments of the present invention, referring to fig. 1 to 3, the outer protective case 300 includes a left case 310 and a right case 320, and an insulating coupling assembly 330 for coupling the left case 310 and the right case 320. The left casing 310 and the right casing 320 can be connected together by the insulating connection assembly 330, and the direct electrical connection between the left casing 310 and the right casing 320 can be avoided, so that the left casing 310 and the right casing 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, referring to fig. 1 to 4, the left housing 310 and the right housing 320 each include: a high-strength insulating inner container layer 301 disposed on the outer surface of the filling layer 400; a metal shell 302 arranged on the outer surface of the high-strength insulating liner layer 301 and connected with the metal current guiding layer 200; and an insulating layer 303 disposed on an outer surface of the metal shell 302. The high-strength insulating inner container layer 301 is made of a material with high strength and good insulating property, so that short-circuit current can be prevented from directly melting through the metal shell 302 as a grounding end, and impact of high-voltage plasma can be blocked. Metal casing 302 realizes ground connection through metal current guiding layer 200, cable 500's metallic shield layer, earthing cable and terminal, can reduce short-circuit current to metal casing 302's influence, and metal casing 302 is because intensity is high simultaneously, also can effectually prevent the injury of inside explosion to external equipment. The insulating layer 303 wraps the surface of the metal shell 302, which can provide a good insulating effect.
In some embodiments of the present invention, the metal shell 302 may be a copper shell, which has better conductivity and certain hardness, and can play the role of grounding diversion and preventing explosion impact.
In some embodiments of the present invention, referring to fig. 1 to fig. 3, the above-mentioned fire-proof and flame-proof type cable intermediate joint further includes a pressure release valve 340 disposed on the metal housing 302, and the pressure release valve 340 is used for releasing the air pressure in the metal housing 302. 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, relief valve 340 includes a lower flange 343, an upper flange 344, a sealing ring 345, and a rupture disk safety device 346. The lower flange 343 is connected to the metal case 302 and communicates with the inside of the metal case 302, the upper flange 344 and the lower flange 343 are connected by bolts, and the upper flange 344 and the lower flange 343 are sealed by a seal ring 345. A pressure relief hole 347 is formed in the middle of the upper flange 344, and the rupture disc safety device 346 is clamped inside the pressure relief hole 347 of the upper flange 344. When the pressure in the metal housing 302 is excessive, it will impact and break the rupture disk safety device 346, thereby completing the pressure relief through the pressure relief hole 347. The rupture disk safety device 346 has the advantages of low cost, sensitive operation, large discharge area, simple maintenance, etc., compared with a spring-type safety valve.
In some embodiments of the present invention, referring to fig. 3, a screen 341 is disposed in the pressure relief valve 340, and the screen 341 is used to reduce damage to external equipment caused by debris brought out during internal explosion. The screen 341 can reduce the impact and damage of the substances such as quartz sand in the filling layer 400 to the external devices, and when fine substances are to be discharged from the pressure relief holes 347, the fine substances can be effectively blocked by the screen 341 and cannot rush out of the metal shell 302. The edges of the screen 341 are typically clamped by the upper flange 344 and the lower flange 343.
In some embodiments of the present invention, referring to fig. 3, a gas fire suppression device 342 is provided within pressure relief valve 340. The gas fire extinguishing device 342 can be activated when a breakdown or explosion occurs inside, effectively reducing the effect of high temperature. The gas fire extinguishing device 342 usually employs aerosol, which has good fire extinguishing effect at high temperature and can effectively reduce the oxygen concentration.
In some embodiments of the present invention, the gas fire extinguisher 342 may be provided separately and independently from the pressure relief valve 340. The separate valve body structure is arranged on the metal shell 302, and the gas fire extinguishing device 342 is arranged in the separate valve body structure, so that the fire extinguishing effect is better. A gas fire suppression device 342 may be disposed on the metal housing 302 on a side opposite the pressure relief valve 340.
In some embodiments of the present invention, referring to fig. 1 to 3, the pressure relief valve 340 is provided in plurality. The pressure relief speed can be increased by arranging the pressure relief valves 340, and the reaction can be more convenient and faster.
In some embodiments of the present invention, the high-strength insulating liner layer 301 is made of a glass fiber liner or an aramid fiber composite liner. The glass fiber material and the aramid fiber composite material are high-strength materials, have good insulating property and can meet the protection requirement.
In some embodiments of the present invention, the filling layer 400 is made of quartz sand. The quartz sand has good stability. After the quartz sand is filled and breakdown occurs, the formed high-temperature plasma which takes carbon, hydrogen and free electrons as main components is firstly combined with the quartz sand 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 is 40 to 70 mesh in size. The quartz sand of 40 to 70 meshes can be better combined with high-temperature plasma which takes 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 (10)
1. The utility model provides a fire prevention flame-proof type cable intermediate head which characterized in that includes:
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 (500) 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 (500) to pass through;
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;
and the filling layer (400) is arranged between the metal diversion layer (200) and the outer protective shell (300) and is used for absorbing heat generated by internal explosives.
2. The intermediate joint of the fireproof flame-proof cable according to claim 1, wherein the metal flow guiding layer (200) is formed by wrapping a lead belt, a copper belt and a copper mesh in a mixed manner.
3. A fire-proof and flameproof cable intermediate joint according to claim 1, characterized in that the outer protective shell (300) comprises a left shell (310) and a right shell (320), and an insulating connecting component (330) for connecting the left shell (310) and the right shell (320).
4. A fire and flame proof type cable intermediate joint according to claim 3, wherein the left casing (310) and the right casing (320) both comprise:
a high-strength insulating inner container layer (301) disposed on the outer surface of the filling layer (400);
the metal shell (302) is arranged on the outer surface of the high-strength insulating inner container layer (301) and is connected with the metal flow guide layer (200);
and the insulating layer (303) is arranged on the outer surface of the metal shell (302).
5. The intermediate joint of the fireproof and flameproof cable according to claim 4, characterized by further comprising a pressure relief valve (340) arranged on the metal shell (302), wherein the pressure relief valve (340) is used for releasing air pressure in the metal shell (302).
6. The intermediate joint of the fireproof flame-proof cable according to claim 5, wherein a screen (341) is arranged in the pressure release valve (340), and the screen (341) is used for reducing the damage of the debris brought out during the internal explosion to the external equipment.
7. A fire-proof and flameproof cable intermediate joint according to claim 5, characterized in that a gas fire extinguishing device (342) is arranged in the pressure relief valve (340).
8. A fire-proof and flameproof cable intermediate joint according to claim 5, characterized in that the pressure relief valve (340) is provided in plurality.
9. The intermediate joint of a fireproof flame-proof cable according to claim 4, wherein the high-strength insulating inner container layer (301) is a glass fiber inner container or an aramid fiber composite material inner container.
10. A fire-proof and flameproof cable intermediate joint according to claim 1, characterized in that the filling layer (400) is made of quartz sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022381944.1U CN213846216U (en) | 2020-10-23 | 2020-10-23 | Fireproof flame-proof type cable intermediate joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022381944.1U CN213846216U (en) | 2020-10-23 | 2020-10-23 | Fireproof flame-proof type cable intermediate joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213846216U true CN213846216U (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022381944.1U Active CN213846216U (en) | 2020-10-23 | 2020-10-23 | Fireproof flame-proof type cable intermediate joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213846216U (en) |
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- 2020-10-23 CN CN202022381944.1U patent/CN213846216U/en active Active
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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 |
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