CN215645050U - Single-core power cable grounding device - Google Patents
Single-core power cable grounding device Download PDFInfo
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- CN215645050U CN215645050U CN202121994728.2U CN202121994728U CN215645050U CN 215645050 U CN215645050 U CN 215645050U CN 202121994728 U CN202121994728 U CN 202121994728U CN 215645050 U CN215645050 U CN 215645050U
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Abstract
The utility model belongs to the technical field of power electronics, and provides a single-core power cable grounding device which comprises: the box body is internally provided with a ground plate and a ground port respectively, and a conductor connecting block and a protector are arranged in the ground port; one end of the protector is detachably connected with the conductor connecting block, and the other end of the protector is detachably connected with the grounding plate; one end of the total grounding ring is connected with the grounding plate, and the other end of the total grounding ring penetrates through the rear cover plate of the box body and extends to the outside of the box body; a first sealing part is further arranged in the box body, and a first sealing part is arranged between the grounding wire and the grounding port; and a second seal between the general ground ring and the back cover plate; the single-core power cable grounding device further comprises a grounding wire locking device positioned outside the box body. Through to the earth wire mounting means, increase the summary ground ring that sets up outside the casing and improve sealed mode to make this single core power cable earthing device have small, simple to operate, sealing performance is good.
Description
Technical Field
The utility model relates to the technical field of power electronics, in particular to a single-core power cable grounding device.
Background
With the rapid development of economy, the power demand is continuously rising; the construction and development of a high-power transmission network are very rapid, and a high-voltage single-core power cable is very commonly used; in order to ensure the safety and the transmission efficiency of a power network, the high-voltage single-core power cable must be reliably grounded; the grounding box is a product for grounding, which is used for meeting the requirement.
However, the existing grounding box on the market at present generally has at least one of the following disadvantages:
1. the volume is large and the weight is heavy; when the grounding wire is installed, the case cover needs to be opened, so that the sealing performance is poor. The wire inlet structure is generally in a bolt connection mode, the wire inlet port is in a tape wrapping mode, the end of the protective layer protector is not separated from the wire inlet end, the waterproof and moistureproof performance is poor, and the installation is complicated; the box body adopts modes such as steel plate welding, and waterproof and insulating properties have hidden troubles.
2. The existing total grounding ring of the solid insulation grounding box is generally arranged on the side surface, and occupies the space on the side surface of the box body, so that the box body has larger volume; and the protector and the box body are cast into a whole by epoxy, so that the protector is not convenient to replace.
3. The existing solid insulation grounding box is generally not provided with a grounding wire locking device, a sealing rubber ring is aged and deformed along with time, and after the grounding wire is subjected to large pulling force, the risk that the grounding wire is separated from the box body and falls off exists.
SUMMERY OF THE UTILITY MODEL
The utility model provides a single-core power cable grounding device, which is characterized in that a summary grounding ring arranged outside a shell is added and a sealing mode is improved by a grounding wire installation mode, so that the single-core power cable grounding device has at least one of the advantages of small volume, convenience in installation, good sealing performance and high connection reliability.
The utility model provides a single-core power cable grounding device, which is characterized by comprising:
the box body is internally provided with a ground plate and a ground port respectively, and a conductor connecting block and a protector are arranged in the ground port; one end of the protector is detachably connected with the conductor connecting block, and the other end of the protector is detachably connected with the grounding plate;
the main grounding ring is connected with the grounding plate at one end, and the other end of the main grounding ring penetrates through a rear cover plate of the box body and extends to the outside of the box body;
the box body is internally provided with a first sealing part, a front cover plate on the outer side of the box body is provided with a clamping part, when a grounding wire penetrates through the front cover plate of the box body and one end of the grounding wire is installed on the grounding port, the grounding wire is locked by the clamping part on the front cover plate, and the first sealing part is installed between the grounding wire and the grounding port; and
a second seal between the general ground ring and the back cover plate;
the single-core power cable grounding device further comprises a grounding wire locking device located on the outer side of the box body.
In a preferred embodiment of the present invention, the protector is a three-phase protector, and three of the conductor connecting block, the ground port, and the first sealing portion are provided.
In a preferred embodiment of the present invention, the detachable connection between one end of the protector and the conductor connecting block is: the conductor connecting block is connected with the protector through threads.
In a preferred embodiment of the present invention, the first sealing portion includes a sealing ring having a trapezoidal cross section, the sealing ring is mounted at a port taper surface of the ground port, and the sealing ring and the ground wire are in an insulating interference fit.
In a preferred embodiment of the present invention, the second sealing portion includes a first nylon insulating ring and a second nylon insulating ring respectively located at two sides of the back cover plate, and the first nylon insulating ring and the second nylon insulating ring are respectively installed at two sides of the back cover plate through a threaded fit, so that the total ground ring is insulated from the back cover plate.
In a further preferred embodiment of the present invention, a sealing groove is disposed on the total ground ring, and the sealing groove and an inner hole of the first nylon insulating ring and/or the second nylon insulating ring realize axial sealing.
In a preferred embodiment of the present invention, the conductor connecting block and the box body are cast together by epoxy insulating material, and a circle of sealing groove is formed on the back cover plate to realize end face sealing with the epoxy insulating material.
In a preferred embodiment of the present invention, a plug conductor and a thrust ring are further disposed in the ground port, the ground wire is in compression joint with the plug conductor, and a contact finger and a compression spring are disposed in the plug conductor and are matched with the conductor connecting block.
In a preferred embodiment of the present invention, the tightening portion is a pressing sleeve, the pressing sleeve is connected to the front cover plate by a bolt, and the boss portion of the pressing sleeve is used for wrapping the heat shrinkable tube and the strip.
In a preferred embodiment of the utility model, the ground wire locking device comprises a hoop and a bracket, and the hoop and the bracket are arranged outside the box body along the wire inlet direction of the ground wire; the bracket mounting is in on the box left and right sides mounting hole, the support includes base, stull, works as when the staple bolt is fixed on the stull, the earth connection passes through the staple bolt to be fixed on the support.
By adopting the technical scheme provided by the utility model, the total grounding ring is arranged on the rear side of the rear cover plate, so that the whole width of the box body is reduced, the volume of the box body is reduced, and the weight is reduced. Because the protector, the grounding plate and the grounding ring are not integrally cast with epoxy, the protector is convenient to replace. And the case body is externally provided with a grounding wire locking device, so that the risk that the grounding wire falls is reduced.
Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure and/or process particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a structural cross-sectional view of a single-core power cable grounding device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a single-core power cable grounding device according to an embodiment of the present invention.
Reference numerals
1-a first nylon insulating ring, 2-a total grounding ring, 3-a second nylon insulating ring B, 4-a grounding outlet, 5-a rear cover plate, 6-a shell, 7-a grounding plate, 8-a protector, 9-an epoxy body, 10-a copper conductor connecting block, 11-a plug copper conductor, 12-a thrust ring, 13-a sealing ring, 14-a front cover plate, 15-a pressing sleeve, 16-a base, 17-a grounding wire, 18-an anchor ear and 19-a cross brace.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that the detailed description is only for the purpose of making the utility model easier and clearer for those skilled in the art, and is not intended to be a limiting explanation of the utility model; moreover, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are all within the scope of the present invention.
The technical scheme of the utility model is described in detail by the figures and the specific embodiments as follows:
examples
Fig. 1 is a cross-sectional view of a single-core power cable grounding device provided in this embodiment, and fig. 2 is a schematic structural view of the single-core power cable grounding device provided in this embodiment. The embodiment provides a single core power cable earthing device, it includes:
the box body is internally provided with a ground plate and a ground port respectively, and a conductor connecting block and a protector are arranged in the ground port; wherein, the one end and the conductor connecting block detachably of protector are connected, and the other end and the ground plate detachably of protector are connected.
The box body can be made of stainless steel materials, and anti-oxidation materials are brushed on the outer part of the box body; or can be a material for a distribution box commonly used in the field of electric power. Each side wall of the box body can be detachably combined together, for example, assembled by using screws, or directly welded together; the casing 6 corresponding to the box body can be a cuboid or other shapes.
The ground plate 7 may be made of a grounded material including, but not limited to, a copper material, and its specific configuration may follow a standard commonly used in electrical engineering. The protector 8 may be, but is not limited to, a varistor protective element having excellent current-voltage characteristics. The grounding port is a mounting portion for a grounding wire 17 (for example, a grounding cable), and the conductor connecting block is preferably a copper conductor connecting block 10, but the embodiment is not limited to only one material such as copper, and can satisfy a good grounding effect, and other materials are also possible; the shape of the copper conductor connection block 10 includes, but is not limited to, a circular ring shape.
The total grounding ring 2, one end of the total grounding ring 2 is connected with the grounding plate 7, and the other end of the total grounding ring passes through the rear cover plate 5 of the box body and extends to the outside of the shell 6 of the box body.
As shown in fig. 1, the present embodiment provides a case in which a first sealing portion is further provided, and the first sealing portion is configured to seal a position between the ground line 17 and a side wall of the ground port after the ground line 17 is mounted to the ground port. And a clamping part is arranged on the front cover plate 14 on the outer side of the box body, when the grounding wire 17 penetrates through the front cover plate 14 of the box body and one end of the grounding wire 17 is arranged on the grounding port, the grounding wire 17 is locked by the clamping part on the front cover plate 14, and a first sealing part is arranged between the grounding wire 17 and the grounding port. The clamping portion is used for fastening the earth wire inside the tank, and a preferred implementation of the clamping portion and the first sealing portion is as described in detail below.
The single core power cable earthing device that this embodiment provided still includes: a second seal between the general ground ring 2 and the rear cover plate 5; the second sealing part can seal the position between the total grounding ring 2 and the rear cover plate 5, so that external sundries, rainwater and the like are prevented from flowing into the box body; and is
The single core power cable earthing device further comprises an earth wire locking device located outside the box for fixing an earth wire 17 leaking out of the box corresponding to the outer part of the outer casing 6.
By adopting the technical scheme provided by the embodiment, the total grounding ring 2 is arranged on the rear side of the rear cover plate 5, so that the whole width of the box body can be reduced, the volume of the box body is reduced, and the weight is reduced. And the case body is externally provided with a grounding wire locking device, so that the risk that the grounding wire falls is reduced.
In a preferred embodiment of this embodiment, the protector 8 is a three-phase protector, and accordingly three conductor connecting blocks, three grounding ports, and three first sealing portions are required to be arranged, so that the single-core power cable grounding device can be provided with three grounding wires 17; however, only one total grounding ring 2 may be provided, and the present embodiment is not limited to only one total grounding ring 2. For example, as shown in fig. 1 and 2, the copper conductor connecting block 10 and the housing 6 are cast integrally by an epoxy body 9 (made of epoxy insulating material). The three-phase grounding port is arranged in the box body, a copper conductor connecting block 10 is arranged in each phase grounding port and is respectively in threaded connection with the protector 8, and the upper end face of the three-phase protector 8 is connected with the lower end face of the grounding plate 7 to realize three-phase connection. The upper end face of the grounding plate 7 is connected with the lower end face of the main grounding ring 2, the main grounding ring 2 is arranged on the rear side of the grounding plate 7, is on the same axis with the incoming line direction of the interphase port and is in threaded connection with the interphase protector, and the other side of the main grounding ring 2 extends out of the rear cover plate 5 and is connected with a grounding part of a cable system (for example, the other side of the main grounding ring is led out of an external power system through a grounding outgoing line) to realize three-phase grounding.
In a preferred embodiment of this embodiment, the detachable connection of one end of the protector 8 and the conductor connecting block includes, but is not limited to: the conductor connecting block is connected with the protector 8 through threads.
As shown in fig. 1, in a preferred embodiment of the present embodiment, the first sealing portion includes a sealing ring 13 with a trapezoidal cross section, the sealing ring 13 is installed at the port taper of the ground port, and the sealing ring 13 and the ground line 17 are in an insulating interference fit.
As shown in fig. 1, in a preferred embodiment of the present embodiment, the second sealing portion includes a first nylon insulating ring 1 and a second nylon insulating ring 3 respectively located at two sides of the back cover plate, and the first nylon insulating ring 1 and the second nylon insulating ring 3 are respectively installed at two sides of the back cover plate 5 through a screw-thread fit, so that the total grounding ring 2 is insulated from the back cover plate 5. In a further preferred embodiment, the total grounding ring 2 is provided with a sealing groove (e.g. 2 sealing grooves), and the sealing groove and the inner hole of the first nylon insulating ring 1 and/or the second nylon insulating ring 3 realize axial sealing.
In the preferred embodiment of this embodiment, the conductor connecting block and the box body are cast into a whole through epoxy insulating material, and a circle of sealing groove is arranged on the back cover plate 5 to realize end face sealing with the epoxy insulating material. For example, the casing 6 of the box body and the 3 copper conductor connecting blocks 10 are cast into a whole by the epoxy body 9 (made of epoxy insulating material), and the protector 8, the grounding plate 7 and the total grounding ring 2 can be detached and replaced.
Therefore, since the protector, the ground plate and the ground ring are not integrally molded with the epoxy, it is convenient to replace one or more of the protector 8, the ground plate 7 and the overall ground ring 2 when there is a replacement need (when a certain part has expired or damaged).
As shown in fig. 1, in a preferred embodiment of this embodiment, a plugging conductor (e.g., a plugging copper conductor 11) and a thrust collar 12 are further disposed in the ground port, the ground wire 17 is in pressure contact with the plugging conductor, and a contact finger and a compression spring are disposed in the plugging conductor and are matched with the conductor connecting block.
As shown in fig. 1, in a preferred embodiment of this embodiment, the clamping portion is a pressing sleeve 15, the pressing sleeve 15 is connected with the front cover plate 14 by bolts, and a boss portion of the pressing sleeve 15 is used for heat shrink tube and tape wrapping.
Specifically, the grounding wire 17 is in compression joint with the pluggable copper conductor 11, a contact finger and a compression spring are arranged on the pluggable copper conductor 11 and are matched with the copper conductor connecting block 10, the grounding wire 17 is provided with a sealing ring 13 and a thrust ring 12 in an insulating mode, and the sealing ring 13 is in insulating interference fit with the cable 17 and forms sealing with a wire inlet port. The pressing sleeve 15 is connected with the front cover plate 14 through bolts to realize tight sealing of the sealing ring 13 and the conical surface of the port, and the boss part of the pressing sleeve 15 is used for wrapping heat-shrinkable tubes and strips.
As shown in fig. 2, in a preferred embodiment of this embodiment, the ground wire locking device includes a hoop 18 and a bracket, and is disposed outside the box body along the wire incoming direction of the ground wire; the support is installed on the mounting hole of the left side and the right side of the box body, the support comprises a base 16 and a cross brace 19, and when the hoop 18 is fixed on the cross brace 19, the grounding wire 17 is fixed on the support through the hoop 18.
Therefore, by adopting the technical scheme provided by the embodiment, the total grounding ring is arranged at the rear side of the rear cover plate, so that the whole width of the box body is reduced, the volume of the box body is reduced, and the weight is reduced; the protector, the grounding plate and the grounding ring are not integrally cast with epoxy, so that the protector is convenient to replace; and the case body is externally provided with a grounding wire locking device, so that the risk that the grounding wire falls is reduced.
Finally, it should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make many changes and simple substitutions to the technical solution of the present invention without departing from the technical solution of the present invention, and the technical solution of the present invention is protected by the following claims.
Claims (10)
1. A single core power cable grounding device, comprising:
the box body is internally provided with a ground plate and a ground port respectively, and a conductor connecting block and a protector are arranged in the ground port; one end of the protector is detachably connected with the conductor connecting block, and the other end of the protector is detachably connected with the grounding plate;
the main grounding ring is connected with the grounding plate at one end, and the other end of the main grounding ring penetrates through a rear cover plate of the box body and extends to the outside of the box body;
the box body is internally provided with a first sealing part, a front cover plate on the outer side of the box body is provided with a clamping part, when a grounding wire penetrates through the front cover plate of the box body and one end of the grounding wire is installed on the grounding port, the grounding wire is locked by the clamping part on the front cover plate, and the first sealing part is installed between the grounding wire and the grounding port; and
a second seal between the general ground ring and the back cover plate;
the single-core power cable grounding device further comprises a grounding wire locking device located on the outer side of the box body.
2. The apparatus of claim 1, wherein the protector is a three-phase protector, and three of the conductor connecting block, the ground port and the first sealing portion are provided.
3. The apparatus of claim 1, wherein one end of the protector is detachably connected to the conductor connecting block by: the conductor connecting block is connected with the protector through threads.
4. The device of claim 1, wherein the first sealing portion comprises a sealing ring with a trapezoidal cross section, the sealing ring is mounted at a port taper of the ground port, and the sealing ring is in an insulating interference fit with the ground wire.
5. The device of claim 1, wherein the second sealing portion comprises a first nylon insulating ring and a second nylon insulating ring respectively located at two sides of the rear cover plate, and the first nylon insulating ring and the second nylon insulating ring are respectively installed at two sides of the rear cover plate through threaded fit, so that the total grounding ring is insulated from the rear cover plate.
6. The device of claim 5, wherein the total grounding ring is provided with a sealing groove, and the sealing groove is axially sealed with an inner hole of the first nylon insulating ring and/or the second nylon insulating ring.
7. The device of claim 1, wherein the conductor connecting block and the box body are integrally cast by epoxy insulating materials, and a circle of sealing groove is formed in the rear cover plate to realize end face sealing with the epoxy insulating materials.
8. The device of claim 1, wherein a plug conductor and a thrust ring are further arranged in the ground port, the ground wire is in compression joint with the plug conductor, and a contact finger and a compression spring are arranged in the plug conductor and are matched with the conductor connecting block.
9. The device of claim 1, wherein the tightening part is a pressing sleeve, the pressing sleeve is connected with the front cover plate through a bolt, and a boss part of the pressing sleeve is used for wrapping the heat-shrinkable tube and the strip.
10. The device as claimed in any one of claims 1 to 9, wherein the ground wire locking device comprises a hoop and a bracket, and is arranged outside the box body along the incoming line direction of the ground wire; the bracket mounting is in on the box left and right sides mounting hole, the support includes base, stull, works as when the staple bolt is fixed on the stull, the earth connection passes through the staple bolt to be fixed on the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121994728.2U CN215645050U (en) | 2021-08-24 | 2021-08-24 | Single-core power cable grounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121994728.2U CN215645050U (en) | 2021-08-24 | 2021-08-24 | Single-core power cable grounding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215645050U true CN215645050U (en) | 2022-01-25 |
Family
ID=79901128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121994728.2U Active CN215645050U (en) | 2021-08-24 | 2021-08-24 | Single-core power cable grounding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215645050U (en) |
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2021
- 2021-08-24 CN CN202121994728.2U patent/CN215645050U/en active Active
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