CN219203517U - Pre-buried type grounding terminal board structure - Google Patents
Pre-buried type grounding terminal board structure Download PDFInfo
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- CN219203517U CN219203517U CN202320031495.9U CN202320031495U CN219203517U CN 219203517 U CN219203517 U CN 219203517U CN 202320031495 U CN202320031495 U CN 202320031495U CN 219203517 U CN219203517 U CN 219203517U
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Abstract
The utility model relates to a pre-buried grounding terminal plate structure, wherein 4 bolt holes are uniformly formed in the middle of the front surface of the structure, a grounding connecting column is arranged on the back surface of the structure, the grounding connecting column is a cylinder, 4 protruding hemispheres are arranged at positions corresponding to the bolt holes on the front surface, and the 4 protruding hemispheres are connected with the end parts of the cylinder through protruding X-shaped connecting ribs. The embedded grounding terminal board structure has good conductivity, corrosion resistance and mechanical strength, can resist the impact of lightning current, can bear the high-temperature chemical reaction of exothermic welding at the end, and can be applied to indoor and outdoor scenes of a nuclear power plant building.
Description
Technical Field
The utility model relates to the field of lightning protection grounding systems, in particular to the field of grounding connection devices, and specifically relates to a pre-buried grounding terminal board structure.
Background
In the building with the concrete structure of the nuclear island factory building of the nuclear power plant, each layer of concrete is laid with the specification of 120mm 2 Is a ground network of (c). The reserved grounding wire and the grounding terminal plate of the grounding grid extending out of the concrete surface are used for grounding. All electrical equipment housings, construction steel structures and other metal objects containing or near the live conductors need to be connected to the in-building ground net. 240mm of outdoor cable well 2 The grounding grid of the (2) extends out of the grounding terminal board on the surface of the concrete for grounding.
At present, the grounding terminal board applied to the transformer substation is made of brass, the conductivity is general, the corrosion resistance is not strong, the application range is aimed at the interior of a factory building, the verification of the external lightning influence is not carried out, and the end part of the grounding terminal board cannot be connected with 240mm 2 Is welded with bare copper cable in an exothermic manner. Due to the uneven quality, there may occur a case where the terminal plate heat release welded portion breaks.
After the nuclear power plant is introduced into the digital instrument control system, the nuclear power plant faces a more complex electromagnetic environment, the cable shielding layers are grounded at two ends, and the interference influence caused by the serial connection of potential differences at two points is required to be eliminated, so that design improvement on equipment components of the lightning protection grounding system is required.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the embedded type grounding terminal board structure which is arranged nearby equipment, has good compatibility and wider application range.
In order to achieve the above object, the pre-buried ground terminal board structure of the present utility model is as follows:
this pre-buried ground terminal plate structure, its main characteristics is, the positive middle part of structure evenly be provided with 4 bolt holes, the back of structure be provided with the ground connection spliced pole, the ground connection spliced pole be the cylinder, the position that corresponds with positive bolt hole is equipped with 4 convex hemispheroids, is connected 4 convex hemispheroids with the end of cylinder through convex X type splice bar.
Preferably, the structure is connected with a single-hole or double-hole grounding connecting sheet at the tail end of the equipment grounding wire through a front bolt hole in a bolt connection mode.
Preferably, the bolt hole is connected with the grounding connection piece in a bolt connection mode.
Preferably, the end of the cylinder on the back is connected to a ground network by exothermic welding.
Preferably, the connection mode of the end part of the cylinder and the grounding network is exothermic welding.
Preferably, each of said bolt holes is matched to 1/2 of a thread.
The embedded grounding terminal board structure has good conductivity, corrosion resistance and mechanical strength, can resist the impact of lightning current, can bear the high-temperature chemical reaction of exothermic welding at the end, and can be applied to indoor and outdoor scenes of a nuclear power plant building.
Drawings
Fig. 1 is a perspective view of a pre-buried ground terminal block structure of the present utility model.
Fig. 2 is a side view of the structure of the pre-buried grounding terminal block of the present utility model.
Fig. 3 is a front view of the structure of the pre-buried grounding terminal board of the present utility model.
Fig. 4 is a rear view of the structure of the pre-buried grounding terminal block of the present utility model.
Fig. 5 is an installation schematic diagram of the pre-buried grounding terminal board structure of the present utility model.
Reference numerals:
1. bolt hole
2. Cylinder body
3. Semicircle sphere
4X type connecting rib
Detailed Description
In order to more clearly describe the technical contents of the present utility model, a further description will be made below in connection with specific embodiments.
According to the embedded type grounding terminal board structure, 4 bolt holes are uniformly formed in the middle of the front face of the structure, the grounding connecting column is arranged on the back face of the structure, the grounding connecting column is a cylinder, 4 protruding hemispheres are arranged at positions corresponding to the bolt holes on the front face, and the 4 protruding hemispheres are connected with the end parts of the cylinder through protruding X-shaped connecting ribs.
As a preferred embodiment of the utility model, the structure is connected with a single-hole or double-hole grounding connection piece at the tail end of the equipment grounding wire through a front bolt hole in a bolt connection mode.
In a preferred embodiment of the present utility model, the bolt hole is connected to the ground connection piece by a bolt.
As a preferred embodiment of the utility model, the rear cylindrical end is connected to a ground network by means of exothermic welding.
As a preferred embodiment of the present utility model, the connection mode between the end of the cylinder and the grounding network is exothermic welding.
As a preferred embodiment of the utility model, each of said bolt holes is matched with 1/2 screw thread.
In the specific implementation mode, the lightning protection standard GB/T33588.1 (IEC 62561) requirements are met, and the lightning protection standard GB/T33588.1 can be simultaneously applied to indoor and outdoor; the conductive material has good conductive performance, is convenient to be arranged near equipment, and meets the electromagnetic compatibility requirement of a nuclear power plant.
The technical scheme of the utility model has a four-hole grounding terminal plate structure and a connecting mode, wherein 4 bolt holes are formed in the front through researching the shape structure and the connecting requirement of a grounding part, the hole pitch meets NEMA CC-1 standard, and the four-hole grounding terminal plate structure can be used for fixing single-hole or double-hole grounding connecting sheets. The back surface is provided with a grounding connecting column,connectable 240mm 2 And the bare copper cable with the following cross section meets the requirement of being connected with a building grounding network. The ground terminal block is integrally designed in the form of an embedded mount for convenient placement near the device.
The front dimension of the terminal board is 82.55mm multiplied by 82.55mm square (with chamfer and chamfer), 4 bolt holes are uniformly arranged in the middle, the hole distance is 44.45mm, the center of the hole is 19.05mm away from the edge, and 1/2 threads are matched in a single hole. The total length of the side faces of the terminal plate was 76.2mm. The back of the terminal board is connected with the cylindrical end parts through the form of the protruding X-shaped connecting ribs, and the 4 protruding hemispheres are connected with the cylindrical end parts. The reverse side is printed with obvious brand marks and lightning protection grounding marks.
The terminal board is connected with the grounding network through the cylindrical end part on the back surface, and the connection mode adopts exothermic welding and can be connected with 240mm 2 Bare copper cables of the following cross section. Through the bolt hole that openly reserves, link to each other with the terminal single hole of equipment earth connection or diplopore ground connection piece, the connected mode adopts bolted connection.
The technical scheme of the utility model has the metal proportion of the four-hole grounding terminal board, and the special metal proportion is adopted to achieve good electric conductivity, ensure the corrosion resistance and the mechanical strength, and can resist the influence of lightning current impact. Meets the requirements of 60 years of service life applied to the indoor and outdoor of the nuclear power plant.
The metal contents of the ground terminal plate are as follows:
| copper (Cu) | Iron (Fe) | Lead | Nickel (Ni) | Other ingredients |
| 92.85％ | 0.024 | 1.44 | 0.16 | 5.526 |
The technical scheme of the utility model meets the GB/T33588.1 (IEC 62561) standard, and the test verification is as follows:
| test item | Inspection item |
| Salt spray test | Appendix D.2 |
| Electrical test | 6.4 a)b)c) |
| Static mechanical stress test | 6.5 |
According to the technical scheme, through the research on the shape structure and the connection requirement of the grounding component, 4 bolt holes are formed in the front surface, the hole pitch meets NEMA CC-1 standard, and the grounding component can be used for fixing a single-hole or double-hole grounding connecting sheet and is matched with a full-thread bolt meeting ASME B1.1. The back is provided with a grounding connection column which can be connected with 240mm 2 And the bare copper cable with the following cross section meets the requirement of being connected with a building grounding network.
According to the technical scheme, through the research on design requirements of the nuclear power plant electric instrument equipment protection ground, the signal ground, the cable shielding and the like, the layout design requirements of electromagnetic compatibility influence are considered. The grounding terminal board is designed into an embedded installation mode, the installation is completed during concrete pouring, and a grounding interface is reserved. When the subsequent electric instrument equipment is installed, the grounding copper cable of the equipment is connected with the grounding terminal board through the grounding connecting sheet. The grounding terminal board can be arranged at the bottom of the floor equipment and near the wall-mounted equipment, so that the grounding is convenient, and the influence of external complex electromagnetic environment is reduced.
The technical scheme of the utility model is suitable for 240mm 2 And the bare copper cable connection with the following cross section meets the arrangement requirement of considering electromagnetic compatibility design, and can meet the requirements of GB/T33588.1 (IEC 62561) salt spray test, electric test and static mechanical stress test.
The hole pitch of the grounding terminal plate is matched with the double-hole connecting sheet of NEMA CC-1.
The reverse side adopts special structural design, can firmly inlay in concrete wall to arrange near equipment in a flexible way, realize the electromagnetic compatibility requirement of equipment ground connection nearby.
When the outdoor wall surface is used, the grounding terminal plate is used as a transitional connecting piece, so that the copper stranded wire gap can be eliminated, and the purpose of blocking outdoor water from penetrating into the indoor is achieved. The domestic requirements of the lightning protection grounding parts of the third-generation nuclear power plants can be met.
The technical scheme of the utility model is applied to lightning protection grounding systems of national and first nuclear power plants, and grounding terminal boards are arranged on the inner wall surface and the ground of a nuclear island factory building and used for grounding nearby electrical instrument equipment, structural modules, cable bridges and the like. And the grounding terminal board is arranged on the wall surface of the factory cable well and the outside of the nuclear island factory building and is used for grounding nearby electric instrument equipment and metal objects.
The specific implementation manner of this embodiment may be referred to the related description in the foregoing embodiment, which is not repeated herein.
It is to be understood that the same or similar parts in the above embodiments may be referred to each other, and that in some embodiments, the same or similar parts in other embodiments may be referred to.
It should be noted that in the description of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "plurality" means at least two.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embedded grounding terminal board structure has good conductivity, corrosion resistance and mechanical strength, can resist the impact of lightning current, can bear the high-temperature chemical reaction of exothermic welding at the end, and can be applied to indoor and outdoor scenes of a nuclear power plant building.
In this specification, the utility model has been described with reference to specific embodiments thereof. It will be apparent, however, that various modifications and changes may be made without departing from the spirit and scope of the utility model. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (6)
1. The utility model provides a pre-buried formula ground terminal plate structure, its characterized in that, positive middle part of structure evenly be provided with 4 bolt holes, the back of structure be provided with the ground connection spliced pole, the ground connection spliced pole be the cylinder, the position that corresponds with positive bolt hole is equipped with 4 convex hemispheroids, is connected 4 convex hemispheroids with the end of cylinder through convex X type splice bar.
2. The pre-buried grounding terminal block structure according to claim 1, wherein the structure is connected with a single-hole or double-hole grounding connection piece at the tail end of a grounding wire of the equipment through a front bolt hole in a bolt connection mode.
3. The pre-buried ground terminal block structure of claim 2, wherein the bolt hole is connected to the ground connection piece by a bolt.
4. The pre-buried ground terminal block structure of claim 1, wherein the cylindrical end of the back face is connected to a ground network by exothermic welding.
5. The structure of claim 4, wherein the connection between the cylinder end and the ground network is by heat release welding.
6. The pre-buried ground terminal block structure of claim 1, wherein each of said bolt holes is 1/2 threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320031495.9U CN219203517U (en) | 2023-01-06 | 2023-01-06 | Pre-buried type grounding terminal board structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320031495.9U CN219203517U (en) | 2023-01-06 | 2023-01-06 | Pre-buried type grounding terminal board structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219203517U true CN219203517U (en) | 2023-06-16 |
Family
ID=86703919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320031495.9U Active CN219203517U (en) | 2023-01-06 | 2023-01-06 | Pre-buried type grounding terminal board structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219203517U (en) |
-
2023
- 2023-01-06 CN CN202320031495.9U patent/CN219203517U/en active Active
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