CN218386749U - Ultrahigh-voltage cable intermediate joint protection system applied to tunnel - Google Patents
Ultrahigh-voltage cable intermediate joint protection system applied to tunnel Download PDFInfo
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- CN218386749U CN218386749U CN202221519007.0U CN202221519007U CN218386749U CN 218386749 U CN218386749 U CN 218386749U CN 202221519007 U CN202221519007 U CN 202221519007U CN 218386749 U CN218386749 U CN 218386749U
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Abstract
The utility model relates to a power cable connects protection technical field, particularly, relate to an extra-high voltage cable intermediate head protection system for in tunnel, can solve conflagration or the explosion that extra-high voltage cable intermediate head trouble on the return circuit of extra-high voltage cable arouses to a certain extent, can lead to all the other return circuits extra-high voltage cable and the facility that set up in the tunnel section to take place the secondary accident, arouse the large tracts of land power failure accident, harm the problem of examining personnel's personal safety. The system comprises: the fire-fighting equipment comprises a fixed supporting device, an ultrahigh-voltage cable intermediate joint, a fire-proof and explosion-proof composite device, an explosion-proof device and a temperature-sensing fire extinguishing device; the fixed supporting device is arranged on the wall of the tunnel; the ultrahigh voltage cable intermediate joint is arranged on the fixed supporting device; the fireproof and explosion-proof composite device is arranged in the height direction of the intermediate joint of the ultrahigh-voltage cable; the explosion-proof device is arranged on one side of the intermediate joint of the ultrahigh-voltage cable, which is far away from the tunnel wall; the temperature sensing fire extinguishing device is arranged on two sides of the intermediate joint of the ultrahigh voltage cable.
Description
Technical Field
The application relates to the technical field of power cable joint protection, in particular to an extra-high voltage cable intermediate joint protection system applied to a tunnel.
Background
With the continuous promotion of urban power grid construction in China, more and more ultrahigh-voltage power cable circuits are provided. 330kV ultrahigh-voltage power cable lines and 500kV ultrahigh-voltage power cable lines in ultrahigh-voltage power cable lines are generally used as a power grid backbone network frame, the laying environment is relatively good, and the ultrahigh-voltage power cable lines are generally laid in special cable tunnels. When the extra-high voltage cable is laid to a longer length, an extra-high voltage cable intermediate joint is needed for connection. The ultrahigh voltage cable intermediate joint is a region with multiple faults in an ultrahigh voltage cable line, and once faults occur in the ultrahigh voltage cable intermediate joint, such as partial discharge, insulation breakdown and the like, fire and explosion are easily caused, and casualty accidents of operation and inspection can be caused.
At present, a high-voltage cable intermediate joint protection device adopts a two-piece structure and can accommodate two high-voltage cables simultaneously. An end face sealing disc is sleeved on each high-voltage cable at two ends of the existing high-voltage cable intermediate joint protection device, and the structural strength and the sealing performance of the high-voltage cable intermediate joint protection device can be improved.
However, at least three extra high voltage cables are generally arranged in the tunnel section, and when the existing high voltage cable intermediate joint protection device is used for protecting the at least three extra high voltage cables in the tunnel section. Because the explosion-proof performance of the existing high-voltage cable intermediate joint protection device is poor, fire or explosion caused by the fault of the ultrahigh-voltage cable intermediate joint on one loop of the ultrahigh-voltage cable can cause secondary accidents of other loops of the ultrahigh-voltage cable and facilities arranged in the cross section of the tunnel, large-area power failure accidents are caused, and the personal safety of operation and inspection personnel is damaged.
SUMMERY OF THE UTILITY MODEL
In order to solve the conflagration or the explosion that the super high voltage cable intermediate head trouble on the return circuit of super high voltage cable arouses, can lead to all the other return circuits super high voltage cable and facilities that set up in the tunnel section to take place the secondary accident, arouse the large tracts of land power failure accident, harm fortune personnel's personal safety's problem, this application provides a super high voltage cable intermediate head protection system who is applied to in the tunnel.
The embodiment of the application is realized as follows:
the embodiment of the application provides an extra-high voltage cable intermediate head protection system for in tunnel, includes: the fire-fighting equipment comprises a fixed supporting device, an ultrahigh-voltage cable intermediate joint, a fire-proof and explosion-proof composite device, an explosion-proof device and a temperature-sensing fire extinguishing device;
wherein, the fixed supporting device is arranged on the wall of the tunnel;
the ultrahigh voltage cable intermediate joint is arranged on the fixed supporting device;
the fireproof and explosion-proof composite device is arranged in the height direction of the middle joint of the ultrahigh-voltage cable and is connected with the fixed supporting device;
the anti-explosion device is arranged on one side, away from the tunnel wall, of the ultrahigh-voltage cable intermediate joint, the anti-explosion device, the fireproof and anti-explosion composite device and the tunnel wall form a closed space, and the ultrahigh-voltage cable intermediate joint is arranged in the closed space;
the temperature-sensing fire extinguishing device is arranged on two sides of the intermediate joint of the ultrahigh-voltage cable and is arranged in the extending direction of the intermediate joint of the ultrahigh-voltage cable.
In some embodiments, the fire and explosion protection composite device comprises a first fire and explosion protection composite device and a second fire and explosion protection composite device which are arranged in parallel;
the first fireproof and explosion-proof composite device is connected with a first bracket of the fixed supporting device and arranged at the top of an intermediate joint of the ultrahigh-voltage cable;
the second fireproof and explosion-proof composite device is connected with a second support of the fixed supporting device and is arranged at the bottom of the intermediate joint of the ultrahigh-voltage cable.
In some embodiments, the first fire-proof and explosion-proof composite device and the second fire-proof and explosion-proof composite device are arranged in a layered structure comprising a fire-proof partition plate, a stainless steel plate and the fire-proof partition plate from top to bottom.
In some embodiments, the explosion-proof device comprises grade A explosion-proof glass and a glass frame;
wherein, first grade explosion-proof glass and glass frame fixed connection, and first grade explosion-proof glass sets up in the one side that tunnel wall was kept away from to the ultra-high voltage cable intermediate head.
In some embodiments, the number of the class A explosion-proof glass is set according to the type of the intermediate joint of the ultra-high voltage cable, and at least one piece of class A explosion-proof glass is arranged.
In some embodiments, the fixed support means comprises a bracket upright, a first bracket, a second bracket and a third bracket;
wherein, the support upright post is arranged on the wall of the tunnel;
a first bracket, a second bracket and a third bracket are sequentially arranged on the bracket upright post from top to bottom;
the first bracket is connected with the fireproof and explosion-proof composite device;
the second bracket is used for fixing an intermediate joint of the extra-high voltage cable;
the second bracket is connected with the fireproof and explosion-proof composite device;
the third support is used for fixing the lower-layer ultrahigh-voltage cable.
In some embodiments, the fixed support device further comprises a bracket arm bracket for fixing the fire and explosion protection composite device and the explosion protection device.
In some embodiments, at least two groups of bracket supports are arranged, and the bracket supports are fixedly connected with the tunnel wall through expansion bolts.
In some embodiments, the temperature-sensitive fire extinguishing apparatus includes at least two fire extinguishing bombs respectively disposed at a head end and a tail end of the extension direction of the intermediate joint of the extra-high voltage cable.
In some embodiments, the glass bezel is made of stainless steel material.
The beneficial effect of this application: the fireproof and explosion-proof composite devices are respectively arranged above and below the intermediate joint of the ultrahigh-voltage cable, and the explosion-proof devices are arranged on the passageway side of the intermediate joint of the ultrahigh-voltage cable, so that the personal safety of operation and inspection personnel in the tunnel can not be damaged when a fire disaster and explosion are caused by the failure of the intermediate joint of the ultrahigh-voltage cable; the safe operation of other loop ultrahigh-voltage cables and facilities on the opposite side of the section of the tunnel and other loop ultrahigh-voltage cables and facilities on the upper layer or the lower layer on the same side in the tunnel can be further realized; further, the head end and the tail end of the ultrahigh-voltage cable intermediate joint are respectively provided with the temperature sensing fire extinguishing device, so that the temperature of the ultrahigh-voltage cable intermediate joint can be monitored in real time, and when the temperature rises, namely, a fire disaster occurs, the fire is timely extinguished through the temperature sensing fire extinguishing device, and the fire is prevented from spreading.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic perspective view illustrating an extra-high voltage cable intermediate joint protection system applied to a tunnel according to one or more embodiments of the present disclosure;
fig. 2 is a schematic cross-sectional view of an extra-high voltage cable intermediate joint protection system applied to a tunnel according to one or more embodiments of the present application;
fig. 3 is a schematic plan view illustrating an extra-high voltage cable intermediate joint protection system applied to a tunnel according to one or more embodiments of the present disclosure;
illustration of the drawings:
wherein, 1-a fixed supporting device, 10-a bracket upright post, 11-a first bracket, 12-a second bracket, 13-a third bracket and 14-a bracket arm bracket; 2-an extra-high voltage cable intermediate joint; 3-a fireproof and explosion-proof composite device, 30-a first fireproof and explosion-proof composite device and 31-a second fireproof and explosion-proof composite device; 4-explosion-proof device, 40-grade A explosion-proof glass, 41-glass frame; 5-temperature sensing fire extinguishing device, 50-fire extinguishing bomb; 6-tunnel wall.
Detailed Description
To make the objects, embodiments and advantages of the present application clearer, the following description of exemplary embodiments of the present application will clearly and completely describe the exemplary embodiments of the present application with reference to the accompanying drawings in the exemplary embodiments of the present application, and it is to be understood that the described exemplary embodiments are only a part of the embodiments of the present application, and not all of the embodiments.
It should be noted that the brief descriptions of the terms in the present application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of the present application. These terms should be understood in their ordinary and customary meaning unless otherwise indicated.
The terms "first," "second," "third," and the like in the description and claims of this application and in the above-described drawings are used for distinguishing between similar or analogous objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances.
The terms "comprises," "comprising," "has," "having," "also includes," "for," and any variation thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to all elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.
The terms "disposed", "connected", "mounted" and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, or integral connections; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The terms "upper", "lower", "top", "bottom", "head end", and "tail end" are used in the orientation shown in the drawings of the present application or in an orientation known to those skilled in the art when such elements are used. The use of the above terms will not make the technical solution of the present application unclear to a person of ordinary skill in the art.
Fig. 1 schematically shows a perspective view of an extra-high voltage cable intermediate joint protection system applied in a tunnel according to an embodiment of the present application.
As shown in fig. 1 and 3, the protection system for the intermediate joint of an extra-high voltage cable applied in a tunnel according to the present application includes: a fixed supporting device 1, an ultrahigh voltage cable intermediate joint 2, a fire-proof and explosion-proof composite device 3, an explosion-proof device 4 and a temperature-sensing fire extinguishing device 5,
wherein, the fixed supporting device 1 is fixedly arranged on the tunnel wall 6,
the ultrahigh voltage cable intermediate joint 2 is detachably mounted on the fixed supporting device 1,
the fireproof and explosion-proof composite device 3 is detachably arranged in the height direction of the intermediate joint 2 of the ultrahigh voltage cable and is fixedly connected with the fixed support device 1,
the explosion-proof device 4 is detachably arranged at one side of the ultrahigh-voltage cable intermediate joint 2 far away from the tunnel wall 6, the explosion-proof device 4, the fire-proof and explosion-proof composite device 3 and the tunnel wall 6 form a closed space, the ultrahigh-voltage cable intermediate joint 2 is arranged in the closed space,
the temperature-sensing fire extinguishing device 5 is arranged on two sides of the ultrahigh-voltage cable intermediate joint 2 and is arranged in the extending direction of the ultrahigh-voltage cable intermediate joint 2.
It should be noted that the fire-proof and explosion-proof composite device 3 and the explosion-proof device 4 are arranged in the scheme, so that the personal safety of operation and inspection personnel in the tunnel can not be harmed when fire and explosion conditions caused by faults of the ultrahigh-voltage cable intermediate joint 2 occur. The fire-proof and explosion-proof composite device 3 and the explosion-proof device 4 can also ensure the safe operation of other loop ultrahigh-voltage cables and facilities on the opposite side of the tunnel section and other loop ultrahigh-voltage cables and facilities on the upper layer or the lower layer on the same side in the tunnel. Still set up temperature sensing extinguishing device 5 in the above-mentioned scheme, can the temperature of real-time supervision superhigh pressure cable intermediate head 2, rise suddenly at the temperature, when perception conflagration or explosion take place promptly, put out a fire through temperature sensing extinguishing device 5.
Fig. 2 schematically shows a cross-sectional structural view of an extra-high voltage cable intermediate joint protection system applied to a tunnel according to an embodiment of the present application.
In some embodiments, as shown in fig. 1 and 2, the fixed support 1 comprises a stand column 10, a first bracket 11, a second bracket 12 and a third bracket 13,
wherein the support upright post 10 is fixedly arranged on the tunnel wall 6,
a first bracket 11, a second bracket 12 and a third bracket 13 are sequentially arranged on the bracket upright post 10 from top to bottom,
the first bracket 11 is fixedly connected with the fireproof and explosion-proof composite device 3, and the first bracket 11 is used for fixing an upper-layer ultrahigh-voltage cable (not shown in the figure),
the second bracket 12 is used for fixing the intermediate joint 2 of the extra-high voltage cable,
the second bracket 12 is fixedly connected with the fireproof and explosion-proof composite device 3,
the third bracket 13 is used for fixing a lower ultra-high voltage cable (not shown in the figure).
Fig. 3 schematically shows a plan view of an extra-high voltage cable intermediate joint protection system applied to a tunnel according to an embodiment of the present application.
It should be noted that, as shown in fig. 1 and 3, at least three support columns 10 are provided, and at least one first support 11, one second support 12 and one third support 13 are provided on one support column 10, that is, the first support 11 is an upper cable mounting support, the second support 12 is a cable intermediate connector mounting support, and the third support 13 is a lower cable mounting support. However, in practical use, a corresponding number of fixing and supporting devices 1 may be arranged according to the practical situation of the extra-high voltage cable inside the tunnel, and the application does not specifically limit the number.
In some embodiments, as shown in FIG. 3, the flameproof composite means 3 comprises a first flameproof composite means 30 and a second flameproof composite means 31 arranged in parallel with each other,
wherein the first fireproof and explosion-proof composite device 30 is fixedly connected with the first bracket 11 of the fixed supporting device 1, the first fireproof and explosion-proof composite device 30 is arranged at the top of the middle joint 2 of the ultrahigh-voltage cable,
the second fire and explosion protection composite device 31 is fixedly connected with the second bracket 12 of the fixed support device 1, and the second fire and explosion protection composite device 31 is arranged at the bottom of the ultrahigh-voltage cable intermediate joint 2.
In some embodiments, the first and second flameproof and explosion-proof composite apparatuses 30 and 31 are each configured as a hierarchical structure including, from top to bottom, a flameproof barrier (not shown), a stainless steel plate (not shown), and a flameproof barrier (not shown).
In some embodiments, as shown in fig. 1 and 3, the vent 4 includes a class a vent glass 40 and a glass bezel 41,
wherein, the two sides of the class a explosion-proof glass 40 are respectively fixedly connected with the glass frame 41 through bolts (not shown in the figure), and the class a explosion-proof glass 40 is arranged on one side of the ultrahigh voltage cable intermediate joint 2 far away from the tunnel wall 6, namely the side of passing through the road.
It should be particularly noted that the explosion-proof device 4 uses the class-a explosion-proof glass 40, which can ensure that the personal safety of the inspection personnel in the tunnel is not damaged when the ultrahigh-voltage cable intermediate joint 2 breaks down to cause fire or explosion. The grade A explosion-proof glass 40 can also facilitate the operation condition of the ultra-high voltage cable intermediate joint 2 monitored by the operation personnel.
In some embodiments, the glass frame 41 may be made of stainless steel, but other materials known to those skilled in the art may be used, and the present application is not limited thereto.
In some embodiments, as shown in fig. 1 and 3, two class a explosion-proof glasses 40 may be used on the channel side of the intermediate joint 2 of the extra-high voltage cable, and the number of the class a explosion-proof glasses 40 may be determined according to the model of the intermediate joint 2 of the extra-high voltage cable, which is not specifically limited in this application.
In some embodiments, as shown in fig. 1 and 3, the fixing and supporting device 1 further comprises a bracket 14, the bracket 14 is fixedly installed on the tunnel wall 6, and the bracket 14 is used for fixing the fire and explosion protection composite device 3 and the explosion protection device 4.
In some embodiments, as shown in fig. 1 and 3, the bracket arm brackets 14 may be provided in four sets, and each of the four sets of bracket arm brackets 14 is fixedly connected to the tunnel wall 6 by an expansion bolt (not shown).
It can be understood that, in the above solution, the bracket arm support 14 is used to fixedly support the fire and explosion protection composite device 3 and the explosion protection composite device 4 in fig. 1, and the bracket arm support 14 can also be welded to the support column 10, so that the whole protection system for the intermediate joint of the extra-high voltage cable has sufficient support strength.
In some embodiments, as shown in fig. 3, the temperature-sensitive fire extinguishing apparatus 5 includes two fire extinguishing bombs 50, and the two fire extinguishing bombs 50 are respectively disposed at the head end and the tail end of the extension direction of the ultra-high voltage cable intermediate joint 2.
It should be noted that the position where the temperature-sensitive fire-extinguishing device 5 is placed in fig. 3 does not represent the position where the temperature-sensitive fire-extinguishing device 5 is placed in actual use. In addition, the temperature-sensitive fire extinguishing apparatus 5 may be a device having a fire extinguishing function other than the fire extinguishing bomb 50, and the temperature-sensitive fire extinguishing apparatus 5 may include other components used together with the fire extinguishing bomb 50, which are not shown in fig. 3. Fig. 3 shows the positional relationship between the temperature-sensitive fire extinguishing device 5 and the ultra-high voltage cable intermediate joint 2 only for clarity, so as to fully explain the technical solution of the present application.
It can be understood that the fire extinguishing bomb 50 in the above-described scheme is used for preventing fire from spreading and extinguishing fire when the middle joint 2 of the ultra-high voltage cable fails to cause a fire.
It should be particularly noted that, in the embodiment of the present application, all the extra-high voltage cable intermediate joint protection systems are described by taking a rectangular tunnel as an example, but the present application does not limit the specific shape of the tunnel, and the connection manner of corresponding parts is changed according to the difference in the tunnel shape. For example: when the ultrahigh-voltage cable intermediate head protection system is applied to a circular tunnel, the supporting arm stand column can be fixed to the arc-shaped support through the cross arm.
It can be understood that the manufacturing materials, the installation numbers and the connection fixing manners of the devices in the extra-high voltage cable intermediate joint protection system of the present application are also determined according to practical situations, and the examples of the present application are only for illustrative purposes and do not represent the actual manufacturing materials, installation numbers and connection fixing manners of the present application, and the present application does not specifically limit the present application.
The beneficial effect of this application: the fireproof and explosion-proof composite devices 3 are respectively arranged above and below the ultrahigh-voltage cable intermediate joint 2, and the explosion-proof devices 4 are arranged on the passageway side of the ultrahigh-voltage cable intermediate joint 2, so that the personal safety of operation and inspection personnel in a tunnel can not be harmed when a fire disaster and an explosion caused by the fault of the ultrahigh-voltage cable intermediate joint 2 occur; the safe operation of other loop ultrahigh-voltage cables and facilities on the opposite side of the section of the tunnel and other loop ultrahigh-voltage cables and facilities on the upper layer or the lower layer on the same side in the tunnel can be further realized; further, the head end and the tail end of the ultrahigh-voltage cable intermediate joint 2 are respectively provided with the temperature sensing fire extinguishing device 5, so that the temperature of the ultrahigh-voltage cable intermediate joint 2 can be monitored in real time, and when the temperature rises and a fire disaster happens, the fire is extinguished in time through the temperature sensing fire extinguishing device 5, and the fire is prevented from spreading.
The foregoing description, for purpose of explanation, has been described with reference to specific embodiments. However, the foregoing discussion in some embodiments is not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.
Claims (10)
1. The utility model provides an be applied to extra-high voltage cable intermediate head protection system in tunnel which characterized in that includes: the fire-fighting equipment comprises a fixed supporting device, an ultrahigh-voltage cable intermediate joint, a fire-proof and explosion-proof composite device, an explosion-proof device and a temperature-sensing fire extinguishing device;
wherein the fixed supporting device is arranged on the wall of the tunnel;
the ultrahigh voltage cable intermediate joint is arranged on the fixed supporting device;
the fireproof and explosion-proof composite device is arranged in the height direction of the intermediate joint of the ultrahigh-voltage cable and is connected with the fixed supporting device;
the anti-explosion device is arranged on one side, away from the tunnel wall, of the ultrahigh-voltage cable intermediate joint, the anti-explosion device, the fire-proof and anti-explosion composite device and the tunnel wall form a closed space, and the ultrahigh-voltage cable intermediate joint is arranged in the closed space;
the temperature sensing fire extinguishing device is arranged on two sides of the ultrahigh-voltage cable intermediate joint and is arranged in the extending direction of the ultrahigh-voltage cable intermediate joint.
2. The protection system for the intermediate joint of the extra-high voltage cable applied to the tunnel according to claim 1, wherein the fire and explosion protection composite device comprises a first fire and explosion protection composite device and a second fire and explosion protection composite device which are arranged in parallel;
the first fireproof and explosion-proof composite device is connected with a first bracket of the fixed supporting device and is arranged at the top of the intermediate joint of the ultrahigh-voltage cable;
the second fireproof and explosion-proof composite device is connected with a second support of the fixed supporting device, and the second fireproof and explosion-proof composite device is arranged at the bottom of the intermediate joint of the ultrahigh-voltage cable.
3. The protection system for the intermediate joint of the extra-high voltage cable applied to the tunnel according to claim 2, wherein the first fire-proof and explosion-proof composite device and the second fire-proof and explosion-proof composite device are arranged in a layered structure comprising a fire barrier, a stainless steel plate and a fire barrier from top to bottom.
4. The protection system for the intermediate joint of the extra-high voltage cable applied to the tunnel according to claim 1, wherein the explosion-proof device comprises class A explosion-proof glass and a glass frame;
the first-level explosion-proof glass is fixedly connected with the glass frame, and the first-level explosion-proof glass is arranged on one side, far away from the tunnel wall, of the ultrahigh-voltage cable intermediate joint.
5. The protection system for the intermediate joint of the extra-high voltage cable applied to the tunnel according to claim 4, wherein the number of the first-class explosion-proof glass is set according to the type of the intermediate joint of the extra-high voltage cable, and the first-class explosion-proof glass is provided with at least one block.
6. The protection system for the intermediate joint of the extra-high voltage cable applied to the tunnel according to claim 1, wherein the fixed supporting device comprises a bracket upright, a first bracket, a second bracket and a third bracket;
wherein the support upright is mounted on the tunnel wall;
the first support, the second support and the third support are sequentially arranged on the support upright column from top to bottom;
the first bracket is connected with the fireproof and explosion-proof composite device;
the second bracket is used for fixing the ultrahigh-voltage cable intermediate joint;
the second bracket is connected with the fireproof and explosion-proof composite device;
and the third support is used for fixing the lower-layer ultrahigh-voltage cable.
7. The protection system for the intermediate joint of the extra-high voltage cable applied to the tunnel according to claim 1, wherein the fixing and supporting device further comprises a bracket arm bracket, and the bracket arm bracket is used for fixing the fire-proof and explosion-proof composite device and the explosion-proof device.
8. The protection system for the intermediate joint of the extra-high voltage cable applied to the tunnel according to claim 7, wherein at least two groups of the bracket arm brackets are provided, and the bracket arm brackets are fixedly connected with the wall of the tunnel through expansion bolts.
9. The protection system for the intermediate joint of the extra-high voltage cable applied to the tunnel according to claim 1, wherein the temperature-sensitive fire extinguishing device comprises at least two fire extinguishing bombs, and the at least two fire extinguishing bombs are respectively arranged at the head end and the tail end of the extension direction of the intermediate joint of the extra-high voltage cable.
10. The protection system for the intermediate joint of the extra-high voltage cable applied to the tunnel according to claim 4, wherein the glass frame is made of stainless steel material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221519007.0U CN218386749U (en) | 2022-06-16 | 2022-06-16 | Ultrahigh-voltage cable intermediate joint protection system applied to tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221519007.0U CN218386749U (en) | 2022-06-16 | 2022-06-16 | Ultrahigh-voltage cable intermediate joint protection system applied to tunnel |
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| CN218386749U true CN218386749U (en) | 2023-01-24 |
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| CN202221519007.0U Active CN218386749U (en) | 2022-06-16 | 2022-06-16 | Ultrahigh-voltage cable intermediate joint protection system applied to tunnel |
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| CN (1) | CN218386749U (en) |
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2022
- 2022-06-16 CN CN202221519007.0U patent/CN218386749U/en active Active
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