CN112421558B - Power cable intermediate head protector - Google Patents
Power cable intermediate head protector Download PDFInfo
- Publication number
- CN112421558B CN112421558B CN202011381885.6A CN202011381885A CN112421558B CN 112421558 B CN112421558 B CN 112421558B CN 202011381885 A CN202011381885 A CN 202011381885A CN 112421558 B CN112421558 B CN 112421558B
- Authority
- CN
- China
- Prior art keywords
- shell
- power cable
- housing
- intermediate joint
- cable intermediate
- Prior art date
- 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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Links
- 230000001012 protector Effects 0.000 title claims description 9
- 239000000463 material Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000007769 metal material Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 239000010426 asphalt Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims description 3
- 239000004593 Epoxy Substances 0.000 claims 1
- 239000011083 cement mortar Substances 0.000 claims 1
- 239000000945 filler Substances 0.000 claims 1
- 238000004880 explosion Methods 0.000 description 6
- 238000012856 packing Methods 0.000 description 4
- 230000001066 destructive effect Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000013521 mastic Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004078 waterproofing Methods 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
- H02G15/08—Cable junctions
- H02G15/18—Cable junctions protected by sleeves, e.g. for communication cable
Landscapes
- Cable Accessories (AREA)
Abstract
The invention provides a power cable intermediate joint protection device which comprises an upper shell, a lower shell and a connecting piece. The both sides of upper portion casing outwards extend respectively and are equipped with connecting portion, the both sides of lower part casing outwards extend respectively and are equipped with down connecting portion, go up connecting portion with lower connecting portion correspond the setting, the both ends of upper portion casing with the both ends of lower part casing correspond respectively and are equipped with the port. The connecting piece connects the corresponding upper connecting part and the lower connecting part to tightly connect the upper shell and the lower shell. The upper housing and the lower housing are connected to form a receiving space for receiving a power cable intermediate connector therein. The invention can realize the protection of the power cable intermediate joint on the basis of not changing the structure of the existing power cable intermediate joint body, is easy to install and convenient to replace quickly.
Description
Technical Field
The invention relates to the field of power cables, in particular to a power cable intermediate joint protection device.
Background
Explosion of the middle joint of the power cable is one of the important causes of fire in the cable trench. The materials commonly adopted by the power cable intermediate joint comprise silicon rubber, ethylene propylene rubber and the like, and the possibility of continuous combustion exists when the power cable intermediate joint meets large current. At the moment of breakdown of the internal insulation of the power cable intermediate joint, the intermediate joint structure of the power cable is broken due to pressure waves formed by a large amount of gas, the intermediate joint structure of the power cable is violently exploded under the combined effect of the electrical and mechanical aspects, and high-risk fire disasters can be caused by the generated huge energy. Thus, despite the low probability of fire in the intermediate joint of the power cable, once a fire has occurred for some reason, it often irreparably damages other equipment in the cable trench (e.g., other loop cables, optical cables, etc.), and even damages other equipment in the vicinity.
At present, in the aspect of protection of a power cable intermediate joint, waterproof and explosion-proof functions are mainly considered, and in the aspect of waterproofing, measures such as wrapping a waterproof adhesive tape and waterproof paint on a shell of the power cable intermediate joint are adopted; in the aspect of explosion prevention, the size and the structure of the baffle plate are designed around the power cable intermediate joint, so that the function of explosion prevention is achieved. Although these protection schemes have certain protection effect, the surrounding environment of the body structure of the power cable intermediate joint is more complicated, the cost is increased in the aspects of processing and maintenance, and the large-area popularization and application are not facilitated.
Disclosure of Invention
The invention aims to solve the technical problem that aiming at the defects in the prior art, the invention provides the power cable intermediate joint protection device which realizes the protection of the power cable intermediate joint on the basis of not changing the structure of the existing power cable intermediate joint body, is easy to install and is convenient to replace quickly.
The technical scheme adopted by the invention for solving the technical problem is to provide a power cable intermediate joint protection device, which comprises an upper shell, a lower shell and a connecting piece, wherein two sides of the upper shell are respectively provided with an upper connecting part in an outward extending manner, two sides of the lower shell are respectively provided with a lower connecting part in an outward extending manner, the upper connecting parts and the lower connecting parts are correspondingly arranged, and two ends of the upper shell and two ends of the lower shell are respectively provided with ports correspondingly; the connecting piece is connected with the corresponding upper connecting part and the corresponding lower connecting part to enable the upper shell and the lower shell to be tightly connected, and the upper shell and the lower shell are connected to form a containing space for containing an intermediate joint of a power cable inside.
The upper portion casing includes casing portion, the casing of lower part includes casing portion down, go up casing portion with casing portion is half cylinder symmetrical structure down, just go up casing portion both ends with the both ends of casing narrow respectively and form down the port, go up connecting portion by the both sides of going up casing portion radially extend outward respectively and form, lower connecting portion by the both sides of casing portion radially extend outward respectively and form down.
The inner surface or the outer surface of the upper shell part is provided with a plurality of circumferential grooves and a plurality of axial grooves, and the inner surface or the outer surface of the lower shell part is also provided with a plurality of circumferential grooves and a plurality of axial grooves.
The upper connecting part and the lower connecting part are correspondingly provided with a plurality of connecting through holes, the connecting piece is a fastening bolt, and the connecting piece penetrates through the connecting through holes correspondingly arranged on the upper connecting part and the lower connecting part to tightly connect the upper shell and the lower shell.
The upper shell further comprises an upper flow guide part, the upper flow guide part is arranged in the upper shell and extends from one end of the upper shell to the other end of the upper shell; the lower shell further comprises a lower flow guide part, wherein the lower flow guide part is arranged in the lower shell part and extends from one end of the lower shell part to the other end of the lower shell part.
The section of the upper flow guide part is V-shaped, and the V-shaped bottom of the upper flow guide part faces the inner surface of the upper shell part; the cross section of the lower flow guide part is V-shaped, and the V-shaped bottom of the lower flow guide part faces the inner surface of the lower shell part.
The upper shell further comprises an upper filling layer, and the upper filling layer is arranged between the inner surface of the upper shell and the upper flow guide piece; the lower shell further comprises a lower filling layer, and the lower filling layer is arranged between the inner surface of the lower shell and the lower flow guide piece.
The power cable intermediate joint protector further comprises end seals and shell seals, wherein the end seals are arranged at the ports at the two ends of the upper shell and the ports at the two ends of the lower shell and are in close contact with the ports of the upper shell and the ports of the lower shell; the housing seal is disposed on the upper connection portion and/or the lower connection portion and is located on a contact surface of the upper connection portion and the lower connection portion excluding the port of the upper housing and the port of the lower housing.
The upper shell portion and the lower shell portion are made of one or a combination of glass fiber reinforced plastics, epoxy resin and metal materials, and the metal materials comprise copper and stainless steel.
The upper and lower deflectors are made of non-absorbent materials with Shore hardness greater than or equal to 40.
The filling layer is formed by fireproof mortar or asphalt.
According to the invention, on the basis of not changing the structure of the existing power cable intermediate joint body, through adding the protective shell structure, the impact energy generated when the power cable intermediate joint explodes is discharged by utilizing the mechanical strength tolerance of the material, so that the destructive influence on surrounding objects caused by the explosion of the power cable intermediate joint is reduced, and the explosion-proof function is achieved. Meanwhile, the water guide piece can be used for gathering water to a specified position after water enters the protection device, and the filling layer is used for realizing a fireproof function. Moreover, the power cable intermediate joint protection device is simple in structure, easy to install, convenient to rapidly replace and good in engineering application value.
Drawings
Fig. 1 is a schematic cross-sectional view of a protection device for an intermediate joint of a power cable according to the present invention.
Fig. 2 is a schematic structural view of an upper housing of the power cable intermediate joint protector of the present invention.
Fig. 3 is a schematic cross-sectional view of an upper housing of the intermediate joint protector for power cables according to the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments, which are only exemplary and do not limit the scope of the present invention.
As shown in fig. 1 to 3, the protection device for an intermediate joint of a power cable according to the present invention includes an upper housing 10, a lower housing 20, a connector, and a sealing member, wherein the upper housing 10 and the lower housing 20 are connected to form a receiving space 50 for receiving the intermediate joint of the power cable therein.
The upper casing 10 includes an upper casing 11, an upper baffle 12, and an upper packing layer 13, and the lower casing 20 includes a lower casing 21, a lower baffle 22, and a lower packing layer 23.
In the present embodiment, the upper case portion 11 and the lower case portion 21 have a semi-cylindrical (180 ° cylindrical) symmetrical structure, and therefore, the upper case portion 11 will be mainly described in detail herein. Referring to fig. 1-3, the upper housing portion 11 is semi-cylindrical, and two ends of the upper housing portion are narrowed to form two ports. The inner or outer surface of the upper housing part 11 of the upper housing 10 may be provided with a plurality of circumferential grooves 110 and a plurality of axial grooves 111, which are aimed at designing the mechanical strength of the shielding device, creating a relatively weak point where the energy is quickly discharged in case of a disruptive failure of the intermediate joint, avoiding the accumulation of energy leading to a crushing explosion, damaging other equipment. In the present embodiment, a plurality of circumferential grooves 110 and a plurality of axial grooves 111 are provided on the inner surface of the upper housing portion 11. As shown in fig. 2, a specific embodiment is shown. Shown is a schematic representation of the upper (lower) shell including 6 (schematic a-f in the figures) circumferential grooves and 1 axial groove.
An upper connecting portion 112 extends radially outward from each of two sides of the upper housing portion 11, and a plurality of connecting through holes 113 are formed in the upper connecting portion 112. The upper flow guide part 12 is installed in the upper housing part 11 and extends from one end of the upper housing part 11 to the other end, the cross section of the upper flow guide part 12 is V-shaped, and the V-shaped bottom of the upper flow guide part faces the inner surface of the upper housing part 11. The upper filling layer 13 is provided between the inner surface of the upper casing 11 and the upper baffle 12, and fills the inner gap of the upper casing 10.
The lower casing portion 21 of the lower casing 20 has a semi-cylindrical shape, and both ends thereof are narrowed to form two ports. The inner surface of the lower housing portion 21 is also provided with a plurality of circumferential grooves and a plurality of axial grooves. The two sides of the lower housing portion 21 respectively extend radially outward to form lower connecting portions corresponding to the upper connecting portions 112, and the lower connecting portions are also provided with a plurality of connecting through holes. The lower deflector 22 is installed in the lower housing portion 21 and extends from one end of the lower housing portion 21 to the other end thereof, and the cross section of the lower deflector 22 is V-shaped, and the V-shaped bottom thereof faces the inner surface of the lower housing portion 21. The lower packing layer 23 is provided between the inner surface of the lower casing portion 21 and the lower baffle 22, and fills the inner gap of the lower casing 20.
A plurality of connection through holes 113 on the upper connection portion 112 of the upper housing portion 11 correspond to a plurality of connection through holes on the lower connection portion of the lower housing portion 21 one by one, so that a connection member (not shown) can pass through the corresponding connection through holes on the upper housing portion 11 and the lower housing portion 21 to tightly connect the upper housing 10 and the lower housing 20, at this time, an accommodating space 50 for accommodating an intermediate joint of a power cable is formed inside the upper housing 10 and the lower housing 20, and ports at two ends of the upper housing portion 11 and ports at two ends of the lower housing portion 11 are correspondingly combined to form a port of a protection device for the intermediate joint of the power cable. In the present embodiment, the connecting member is a fastening bolt, but the invention is not limited thereto, and is not limited to this connecting manner.
The seals comprise an end seal 41 and a housing seal 42 for enhancing the sealing of the power cable intermediate joint protection. As shown in fig. 1, end seals 41 are installed at both end ports of the upper case 10 and both end ports of the lower case 20 and are in close contact with inner walls of both end ports of the upper case 10 and both end ports of the lower case 20. The case seal 42 is provided on the connection portion 112 of the upper case portion 11 (as shown in fig. 3) and the connection portion of the lower case portion 21, and is located on the contact surface between the connection portion 112 of the upper case portion 11 and the connection portion of the lower case portion 21 excluding the ports at both ends, and is in close contact with the upper case portion 11 and the lower case portion 21.
In the protection device for the intermediate joint of the power cable of the present invention, the material of the upper housing part 11 and the lower housing part 21 may be one or a combination of more of glass fiber reinforced plastics, epoxy resin and metal materials, wherein the metal materials include copper, stainless steel, etc., but are not limited thereto; the upper and lower deflectors 12 and 22 are made of a non-absorbent material having a hardness (shore hardness greater than or equal to 40); the upper and lower packing layers 13 and 23 may be formed of fire-retardant mastic, asphalt, etc., but are not limited thereto; the connecting piece is made of stainless steel, but is not limited to the stainless steel; the end seal 41 and the housing seal 42 are made of, but not limited to, silicone rubber or other rubber material having water-blocking properties.
When the power cable intermediate joint protection device is used for a power cable intermediate joint, the power cable intermediate joint can be firstly arranged between the upper shell and the lower shell, and then the upper shell and the lower shell are tightly connected by using the connecting piece, so that the power cable intermediate joint is stably arranged in the power cable intermediate joint protection device.
Therefore, on the basis of not changing the structure of the existing power cable intermediate joint body, the protection shell structure is added, the impact energy generated when the power cable intermediate joint explodes is discharged by utilizing the mechanical strength tolerance of the material, the destructive influence on surrounding objects caused by the explosion of the power cable intermediate joint is reduced, and the explosion-proof function is achieved. Meanwhile, the water guide piece can be used for gathering water to a specified position after water enters the protection device, and the filling layer is used for realizing a fireproof function. Moreover, the power cable intermediate joint protection device is simple in structure, easy to install, convenient to rapidly replace and good in engineering application value.
The technical solutions and drawings provided in the embodiments of the present invention are used for further illustrating the present invention and are not limited thereto, and it should be noted that, as will be understood by those skilled in the art, modifications may still be made to the technical solutions described in the foregoing embodiments, or equivalents may be made to some or all of the technical features thereof, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the present invention.
Claims (8)
1. A power cable intermediate joint protection device is characterized by comprising an upper shell, a lower shell and a connecting piece, wherein two sides of the upper shell are respectively provided with an upper connecting part in an outward extending manner, two sides of the lower shell are respectively provided with a lower connecting part in an outward extending manner, the upper connecting parts are arranged corresponding to the lower connecting parts, and two ends of the upper shell and two ends of the lower shell are respectively provided with ports; the connecting piece is connected with the corresponding upper connecting part and the corresponding lower connecting part to enable the upper shell and the lower shell to be tightly connected, and the upper shell and the lower shell are connected to form a containing space for containing an intermediate joint of a power cable inside;
the upper shell comprises an upper shell body, the lower shell comprises a lower shell body, the upper shell body and the lower shell body are of semi-cylindrical symmetrical structures, and two ends of the upper shell body and two ends of the lower shell body are respectively narrowed to form the port; the upper shell further comprises an upper flow guide part, and the upper flow guide part is mounted in the upper shell and extends from one end of the upper shell to the other end of the upper shell; the lower shell also comprises a lower flow guide part, and the lower flow guide part is arranged in the lower shell part and extends from one end of the lower shell part to the other end;
the section of the upper flow guide part is V-shaped, and the V-shaped bottom of the upper flow guide part faces the inner surface of the upper shell part; the cross section of the lower flow guide part is V-shaped, and the V-shaped bottom of the lower flow guide part faces the inner surface of the lower shell part.
2. The power cable intermediate joint protector as claimed in claim 1, wherein the upper connecting portion is formed by extending radially outwardly from both sides of the upper housing portion, and the lower connecting portion is formed by extending radially outwardly from both sides of the lower housing portion.
3. A power cable intermediate joint protector according to claim 2 wherein the inner or outer surface of the upper housing portion is provided with a plurality of circumferential grooves and a plurality of axial grooves, and the inner or outer surface of the lower housing portion is also provided with a plurality of circumferential grooves and a plurality of axial grooves.
4. The power cable intermediate joint protection device according to claim 1 or 2, wherein a plurality of connecting through holes are correspondingly formed on the upper connecting portion and the lower connecting portion, the connecting member is a fastening bolt, and the connecting member passes through the corresponding connecting through holes formed on the upper connecting portion and the lower connecting portion to tightly connect the upper housing and the lower housing.
5. The power cable intermediate joint shield apparatus of claim 4 wherein the upper housing further comprises an upper filler layer disposed between an inner surface of the upper housing portion and the upper baffle; the lower shell further comprises a lower filling layer, and the lower filling layer is arranged between the inner surface of the lower shell and the lower flow guide piece.
6. A power cable intermediate joint protector according to claim 1 further comprising end seals and housing seals, wherein the end seals are provided at the ports at both ends of the upper housing and at the ports at both ends of the lower housing and are in intimate contact with inner walls of the ports of the upper housing and the lower housing; the housing seal is disposed on the upper connection portion and/or the lower connection portion and is located on a contact surface of the upper connection portion and the lower connection portion excluding the port of the upper housing and the port of the lower housing.
7. The power cable intermediate joint guard of claim 2 wherein the material of the upper and lower housing portions is a combination of one or more of glass reinforced plastic, epoxy, and metal materials including copper and stainless steel.
8. The power cable intermediate joint protector of claim 5, wherein the upper and lower deflectors are made of a non-water absorbent material having a Shore hardness greater than or equal to 40; and/or the filling layer is formed by fireproof cement mortar or asphalt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011381885.6A CN112421558B (en) | 2020-12-01 | 2020-12-01 | Power cable intermediate head protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011381885.6A CN112421558B (en) | 2020-12-01 | 2020-12-01 | Power cable intermediate head protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112421558A CN112421558A (en) | 2021-02-26 |
| CN112421558B true CN112421558B (en) | 2022-06-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011381885.6A Active CN112421558B (en) | 2020-12-01 | 2020-12-01 | Power cable intermediate head protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112421558B (en) |
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| CN205029296U (en) * | 2015-09-02 | 2016-02-10 | 重庆大业电气有限责任公司 | Double -deck explosion -proof box |
| CN206364489U (en) * | 2016-11-30 | 2017-07-28 | 广东安诺新材料科技有限公司 | Totally-enclosed watering-type cable intermediate joint waterproof fireproofing anti-explosion safety box |
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| JP2002184596A (en) * | 2000-12-14 | 2002-06-28 | Yokogawa Denshikiki Co Ltd | Terminal treatment structure of high-tension cable for static charge eliminator |
| CN103795019A (en) * | 2013-11-26 | 2014-05-14 | 宁波东昊电缆附件有限公司 | Crosslinked cable intermediate joint copper shell |
| CN205882640U (en) * | 2016-08-15 | 2017-01-11 | 中国电力工程顾问集团西北电力设计院有限公司 | 800kV direct current exchanges with tower wire arrangement structure with two 750kV that return |
| CN206364488U (en) * | 2016-11-30 | 2017-07-28 | 广东安诺新材料科技有限公司 | A kind of inside is equipped with the cable intermediate joint safety box of antiknock fire-proof plate |
| CN108808617B (en) * | 2018-07-03 | 2024-05-17 | 深圳供电局有限公司 | Three-phase cable intermediate joint |
| CN110220628A (en) * | 2019-07-03 | 2019-09-10 | 四川大学 | A method of expanding radial force when measurement cable intermediate joint operation |
| CN210380218U (en) * | 2019-08-23 | 2020-04-21 | 苏州九维电气制造有限公司 | Cable joint protective sleeve |
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2020
- 2020-12-01 CN CN202011381885.6A patent/CN112421558B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205029296U (en) * | 2015-09-02 | 2016-02-10 | 重庆大业电气有限责任公司 | Double -deck explosion -proof box |
| CN206364489U (en) * | 2016-11-30 | 2017-07-28 | 广东安诺新材料科技有限公司 | Totally-enclosed watering-type cable intermediate joint waterproof fireproofing anti-explosion safety box |
| CN109286083A (en) * | 2018-09-28 | 2019-01-29 | 乐清市华仪电缆附件有限公司 | A kind of three-core cable welded joint and its mounting process |
| CN108973480A (en) * | 2018-10-19 | 2018-12-11 | 常州市武进广宇花辊机械有限公司 | Oil-leakage-prevention heated embossing rolls |
| CN111463584A (en) * | 2020-04-28 | 2020-07-28 | 深圳市沃尔电力技术有限公司 | Wire core intermediate joint and connection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112421558A (en) | 2021-02-26 |
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