阅读说明：本技术 一种室外的金属电缆托架的接地系统 (Outdoor metal cable bracket's ground system ) 是由 赵日升 李淑婧 黄伟 陈业 陈纯 季辉 龚洁 葛呈炜 赵琳 于 2020-06-11 设计创作，主要内容包括：本发明公开了一种室外的金属电缆托架的接地系统,其包括接地柱、接地孔、接地线和齿形垫圈。其中接地柱焊接在用于承载金属电缆托架的支墩上,接地孔位于金属电缆托架侧面的旁板上,采用接地线连接接地柱和接地孔。系统还包括齿形垫圈,齿形垫圈通过磨损托架小部分清漆涂层增强系统导电性。系统采用接地线连接相邻的两段托架。此外,系统还在接地柱和接地螺栓外部涂覆凡士林油脂增加接地设施的耐腐蚀性。本发明中的室外的金属电缆托架的接地系统保证了船舶电路设施的电连续性,避免电缆漏电形成的反向电流对设备的影响和对人身安全的威胁,确保了海上作业的安全环境。(The invention discloses an outdoor grounding system of a metal cable bracket, which comprises a grounding post, a grounding hole, a grounding wire and a tooth-shaped gasket. The grounding column is welded on a buttress used for bearing the metal cable bracket, the grounding hole is positioned on a side plate on the side surface of the metal cable bracket, and the grounding column and the grounding hole are connected by adopting a grounding wire. The system also includes a castellated washer that enhances system conductivity by wearing away a small portion of the varnish coating of the carrier. The system adopts a grounding wire to connect two adjacent sections of brackets. In addition, the system also coats Vaseline grease outside the grounding post and the grounding bolt to improve the corrosion resistance of the grounding facility. The grounding system of the outdoor metal cable bracket ensures the electrical continuity of the ship circuit facilities, avoids the influence of reverse current formed by cable leakage on equipment and the threat to personal safety, and ensures the safe environment of offshore operation.)

1. An outdoor grounding system of a metal cable bracket, wherein the metal cable bracket comprises a side plate, and the outdoor grounding system at least comprises a group of grounding assemblies, and each group of grounding assemblies comprises a grounding post, a grounding bolt, a first grounding hole and a first grounding wire which are in one-to-one correspondence; each group of the grounding assemblies corresponds to one buttress and one side plate of the ship body; the grounding columns are welded on the corresponding buttresses, one ends of the corresponding first grounding wires are fixed on the corresponding side plates by using the corresponding grounding bolts, and the other ends of the first grounding wires are fixedly connected on the corresponding grounding columns; when the metal cable bracket has leakage current, the leakage current enters the ground after passing through the corresponding side plate, the first grounding wire, the grounding column and the buttress in sequence.

2. The outdoor grounding system for metal cable trays of claim 1, wherein each set of said grounding assemblies further comprises a castellated washer that is fitted between the corresponding grounding bolt and the surface of said metal cable tray, said castellated washer being adapted to abrade a varnish coating of a portion in contact with said metal cable tray.

3. The outdoor grounding system for metal cable trays of claim 1 wherein said grounding system further comprises a second ground line; and two ends of each metal cable bracket are respectively provided with a second grounding hole, and two ends of each second grounding wire are respectively and fixedly connected in two second grounding holes which are closest to the two adjacent sections of the metal cable brackets.

4. The outdoor grounding system for metal cable trays of claim 1 wherein said grounding system comprises a plurality of sets of said grounding assemblies, and the spacing between two adjacent grounding posts is 30-60 meters.

5. The outdoor grounding system of metal cable trays of claim 1 wherein all of said grounding posts and the outside of said grounding bolts are coated with petrolatum.

6. The outdoor grounding system for metal cable trays of any one of claims 1 to 5, wherein said metal cable tray is a stainless steel cable tray.

7. The outdoor grounding system for metal cable trays of claim 1, wherein the first grounding wire has a nominal cross-sectional area ranging from 70mm to 120mm²。

8. The outdoor grounding system for metal cable trays of claim 3 wherein the second grounding wire has a nominal cross-sectional area in the range of 35 to 50mm²。

Technical Field

The invention relates to a grounding system of a cable bracket, in particular to a grounding system of an outdoor metal cable bracket.

Background

The metal cable bracket is widely used on an offshore floating production storage and offloading vessel (FPSO). The total length of the cables laid on the metal cable brackets on the single ship can reach 60 kilometers, the total length of the metal cable brackets required to be arranged can reach 1 kilometer, and most of the metal cable brackets are exposed to the outdoor environment. Therefore, the metal cable tray is easily electrified due to electromagnetic induction between the cables or cable breakage and leakage. Because the insulating layer is arranged between the metal cable bracket and the hull buttress, the bracket cannot be effectively grounded, the generated leakage current easily influences the normal work of electrical equipment, and great potential safety hazards are caused to personnel on the ship. Meanwhile, the metal material exposed in the air with high salt content and high humidity on the sea is easy to corrode and rust, so that the conductive effect is unstable.

Disclosure of Invention

The invention aims to overcome the defect of personnel and equipment safety caused by electrification of a metal cable bracket in the prior art, and provides an outdoor grounding system for the metal cable bracket.

The invention solves the technical problems through the following technical scheme:

the invention provides an outdoor grounding system of a metal cable bracket, which comprises a side plate, wherein the grounding system at least comprises a group of grounding assemblies, and each group of grounding assemblies comprises a grounding post, a grounding bolt, a first grounding hole and a first grounding wire which are in one-to-one correspondence; each group of the grounding assemblies corresponds to one buttress and one side plate of the ship body; the grounding columns are welded on the corresponding buttresses, one ends of the corresponding first grounding wires are fixed on the corresponding side plates by using the corresponding grounding bolts, and the other ends of the first grounding wires are fixedly connected on the corresponding grounding columns; when the metal cable bracket has leakage current, the leakage current enters the ground after passing through the corresponding side plate, the first grounding wire, the grounding column and the buttress in sequence.

Preferably, each group of grounding assemblies further comprises a tooth-shaped gasket, the tooth-shaped gasket is sleeved between the corresponding grounding bolt and the surface of the metal cable bracket, and the tooth-shaped gasket is used for wearing the varnish coating of the contact part of the tooth-shaped gasket and the metal cable bracket.

Preferably, the grounding system further comprises a second grounding line; and two ends of each metal cable bracket are respectively provided with a second grounding hole, and two ends of each second grounding wire are respectively and fixedly connected in two second grounding holes which are closest to the two adjacent sections of the metal cable brackets.

Preferably, the grounding system comprises a plurality of groups of grounding assemblies, and the interval between two adjacent grounding columns is 30-60 meters.

Preferably, all the grounding posts and the outer sides of the grounding bolts are coated with vaseline grease.

Preferably, the metal cable tray is a stainless steel cable tray.

Preferably, the first ground line has a nominal cross-sectional area ranging from 70mm to 120mm²(square millimeter).

Preferably, the nominal cross-sectional area of the second grounding wire ranges from 35mm to 50mm²。

The positive progress effects of the invention are as follows:

compared with the prior art, the grounding system of the outdoor metal cable bracket provided by the invention has the advantages that the grounding column is additionally arranged on the buttress of the ship body and is connected with the metal cable bracket, so that the metal cable bracket arranged outdoors can be grounded, and the conductive effect can be effectively enhanced by additionally arranging the tooth-shaped gasket, so that the normal work of electrical equipment is ensured, and the personal safety of personnel on the ship is ensured; the grounding wire is adopted to connect two adjacent sections of brackets, so that the effective grounding of the brackets can be ensured when the total distance of the brackets is long; the grounding system is effectively protected against the marine corrosion-prone environment.

Drawings

Fig. 1 is a schematic grounding diagram of a grounding system of an outdoor metal cable tray according to a preferred embodiment of the present invention.

Fig. 2 is a schematic view illustrating the connection of the grounding bolt and the tooth washer of the grounding system of the outdoor metal cable bracket according to a preferred embodiment of the present invention.

Fig. 3 is a top view of the grounding system of the outdoor metal cable tray of the present invention, showing the neighboring metal cable tray grounding.

Fig. 4 is a side view of the grounding system of the outdoor metal cable tray of the present invention for grounding the adjacent metal cable tray.

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

The buttress involved in the embodiment is a metal load-bearing building on a ship, the bottom of the buttress is welded on a ship body, the bottom of the buttress is at the same potential as the ship body, and a metal cable bracket is arranged on the buttress. The embodiment relates to a metal cable bracket made of stainless steel, a buttress is usually made of carbon steel, and the buttress and the metal cable bracket are separated by a nylon plate and are insulated from each other. The side plates mentioned in the examples are the side surfaces of the "shaped metal cable bracket". The metal cable brackets are connected and fixed by metal sheets.

Referring to fig. 1-4, the present embodiment provides an outdoor grounding system for a metal cable tray, the metal cable tray 2 includes a side plate 3, and the metal cable tray 2 is a stainless steel cable tray. The grounding system comprises a plurality of groups of grounding assemblies, and each group of grounding assemblies comprises a grounding post 5, a grounding bolt 6, a first grounding hole 7, a tooth-shaped gasket 9 and a first grounding wire 8 which are in one-to-one correspondence; each group of grounding assemblies corresponds to one buttress 10 and one side plate 3 of the ship body; the grounding columns 5 are welded on the corresponding buttresses 10, one ends of the corresponding first grounding wires 8 are fixed on the corresponding side plates 3 by using the corresponding grounding bolts 6, and the other ends of the first grounding wires 8 are fixedly connected on the corresponding grounding columns 5; when the metal cable bracket has leakage current, the leakage current enters the ground after sequentially passing through the corresponding side plate 3, the first grounding wire 8, the grounding column 5 and the buttress 10.

In this embodiment, the tooth-shaped washer 9 is fitted between the corresponding ground bolt 6 and the surface of the metal cable tray 2, and the tooth-shaped washer 9 is used to wear the varnish coating of the portion in contact with the metal cable tray 2. In the embodiment, the metal cable bracket 2 with the varnish coated on the surface is used, the conductive effect of the metal cable bracket is influenced due to the varnish coated on the surface of the bracket, and the tooth-shaped gasket 9 is additionally arranged at the grounding bolt of the metal cable bracket, so that the tooth-shaped gasket 9 abrades the varnish coating of the contact part of the tooth-shaped gasket 9 and the metal cable bracket 2 in the screwing process of the grounding bolt 6, and the conductive effect can be effectively enhanced.

In practice, the length of a single metal cable tray is typically around 3 meters, and the total length can reach hundreds of meters. Therefore, it is necessary to effectively ground the metal cable trays 2 and the buttresses 10, and to effectively connect two adjacent metal cable trays 2 to each other to ensure the electrical continuity of the entire grounding system. In this embodiment, the grounding system further includes a second grounding line 17; two ends of the side plate 3 of each metal cable bracket 2 are respectively provided with a second grounding hole, and two ends of a second grounding wire 17 are respectively and fixedly connected in two second grounding holes which are nearest to the same side of the two adjacent sections of metal cable brackets 2. Specifically, taking the left and right adjacent first metal cable tray 11 and second metal cable tray 12 in fig. 3 and 4 as an example, the first side plate 13 of the first metal cable tray 11 has a left second grounding hole 14, and the second side plate 15 of the second metal cable tray 12 has a right second grounding hole 16, wherein the first side plate 13 and the second side plate 15 are located on the same side, and the left second grounding hole 14 and the right second grounding hole 16 are nearest to each other. Two ends of a second grounding wire 17 are fixedly connected to the left second grounding hole 14 and the right second grounding hole 16 through a first grounding bolt 18 and a second grounding bolt 19 respectively, a first tooth-shaped gasket 20 and a second tooth-shaped gasket 21 are additionally arranged under the first grounding bolt 18 and the second grounding bolt 19, and the purposes and the principles are the same as those of the tooth-shaped gasket 9. When the first metal cable tray 11 is charged, the leakage current flows out through the second ground wire 17 and the second metal cable tray 12 in order, and vice versa.

In the embodiment, the interval between two adjacent grounding posts can be 30-60 meters; the range of the nominal sectional area of the first grounding wire is 70-120 mm²(ii) a The range of the nominal sectional area of the second grounding wire is 35-50 mm². In this embodiment, the installation interval of the grounding posts is 50 meters, the metal cable bracket is made of stainless steel, and the nominal sectional area of the first grounding wire 8 is 70mm²Specification, the nominal sectional area of the second grounding wire 17 is 35mm²And (5) specification.

In this embodiment, all the grounding posts and the outer sides of the grounding bolts are coated with vaseline grease so as to ensure the overall corrosion resistance and rust resistance of the grounding system.

According to the grounding system of the outdoor metal cable bracket, the grounding column is additionally arranged on the buttress of the ship body, and the metal cable bracket and the grounding column are connected through the first grounding wire, so that the metal cable bracket arranged outdoors can be grounded; the second grounding wire is connected with the two adjacent sections of metal cable brackets, so that the brackets can still be effectively grounded when the total distance of the brackets is long, the electric continuity of the paths of the metal cable brackets is enhanced, the influence of reverse current formed by electric leakage of cables on equipment can be avoided, and the safety of the cables under the condition of normal power on is improved. And the corrosion resistance of the whole grounding system is improved by covering the grounding post and the grounding bolt with the vaseline, so that the grounding system of the metal cable bracket is durable, and a safer operation environment is brought for marine navigation.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.