CN113904190A

CN113904190A - Internal grounding method for concrete pole

Info

Publication number: CN113904190A
Application number: CN202111216524.0A
Authority: CN
Inventors: 于新民; 陈石川; 李小刚; 刘志伟; 施孝霖; 林瑞宗; 陈祥; 聂克剑; 傅本钊; 陈远浩
Original assignee: Economic and Technological Research Institute of State Grid Fujian Electric Power Co Ltd
Current assignee: Economic and Technological Research Institute of State Grid Fujian Electric Power Co Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-01-07

Abstract

The invention relates to a concrete pole internal grounding method, which comprises the following steps: access points are arranged at the upper part and the lower part of the concrete pole; step two: a nut electrically connected with a reinforcement cage of the concrete pole is embedded at an access point of the concrete pole, and the outer end of the nut is communicated with the outer periphery of the concrete pole; step three: the concrete pole has the advantages that the construction is convenient, the pole can be prefabricated, the inside of the pole is grounded, a grounding loop can be formed only by connecting an external bolt and a nut in the later period, the corrosion resistance is higher, and the appearance is more attractive.

Description

Internal grounding method for concrete pole

Technical Field

The invention relates to the field of pile foundation construction, in particular to an internal grounding method for a concrete pole.

Background

The distribution line pole used in China mostly adopts a concrete pole. Taking the Fujian area as an example, the Fujian province is located in the southeast coastal region, the strong thunder area and the multiple thunder area account for 97% of the total area of the whole province, the coverage rate of the lightning arresters of the power distribution lines exceeds 27%, most of the lightning arresters of the lines are not provided with independent grounding devices, and the poles are naturally grounded. After lightning stroke 10kV overhead line caused the arrester to switch on, because tower head metal cross arm does not do equipotential with reinforced concrete pole inner structure reinforcing bar usually and is connected, lightning overvoltage discharged pole structure reinforcing bar at the cross arm position easily, caused the concrete on pole top layer to burst and drop, exposed inner structure reinforcing bar even. Under the erosion of long-term rainwater moisture etc., the naked structural reinforcement of pole corrodes gradually, influences pole mechanical strength.

And the pole of the outside ground connection's of round steel form, its ground connection downlead under the erosion of long-term rainwater moisture etc. under the erosion of the exposed structural reinforcement of pole corrosion long-term rainwater moisture etc. gradually, the exposed structural reinforcement of pole corrosion gradually.

Disclosure of Invention

Aiming at the defects, the invention provides an internal grounding method for a concrete pole.

The technical scheme adopted by the invention for solving the technical problem is that the internal grounding method of the concrete pole comprises the following steps:

the method comprises the following steps: access points are arranged at the upper part and the lower part of the concrete pole;

step two: a nut electrically connected with a reinforcement cage of the concrete pole is embedded at an access point of the concrete pole, and the outer end of the nut is communicated with the outer periphery of the concrete pole;

step three: and grounding the lower end of a reinforcement cage of the concrete pole.

Furthermore, the access point of the upper part is arranged at a position 2 meters away from the tip top, and the access point of the lower part is arranged at a position 0.5 meters above the buried deep line of the electric pole.

Furthermore, two screw caps are arranged at each access point at intervals up and down.

Furthermore, the upper side and the lower side of the inner end of the nut are both provided with inner stirrups of the reinforcement cage, the inner end of the nut is welded with the inner stirrups on the upper side and the lower side of the nut, and the inner stirrups and main reinforcements of the reinforcement cage are bound through iron wires.

Furthermore, the inner stirrup and the binding part of the inner stirrup and the main reinforcement are coated with electric grease, and the coating thickness is not less than 0.2 mm.

Furthermore, the interior of the nut is coated with electric grease, the thickness of the coating is not less than 0.2mm, and a plastic factory-leaving protection bolt is screwed in the nut.

Compared with the prior art, the invention has the following beneficial effects: construction convenience, the pole can be prefabricated, and the inside ground connection of pole, the later stage only need be connected through outside bolt and nut and form ground return circuit promptly, and the corrosion resistance ability is stronger, and more pleasing to the eye.

Drawings

The invention is further described with reference to the following figures.

Fig. 1 is a schematic view of a structure of a concrete pole.

Fig. 2 is a schematic view of the installed position of the nut.

Fig. 3 is a first schematic view of the connection structure of the nut and the reinforcement cage.

Fig. 4 is a schematic view of a connection structure of the nut and the reinforcement cage.

In the figure: 1-concrete pole, 2-upper access point, 3-lower access point, 4-nut, 5-reinforcement cage, 6-main reinforcement and 7-inner stirrup.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

As shown in fig. 1 to 4, a method for grounding the inside of a concrete pole includes the steps of:

the method comprises the following steps: access points are arranged at the upper part and the lower part of the concrete pole 1;

step two: a nut 4 electrically connected with a reinforcement cage of the concrete pole is embedded at an access point of the concrete pole, and the outer end of the nut is communicated with the outer periphery of the concrete pole;

step three: the lower end of the reinforcement cage 5 of the concrete pole is grounded.

In the present embodiment, the upper access point 2 is located 2 meters from the tip, and the lower access point 3 is located 0.5 meters above the buried deep line of the pole.

In this embodiment, to ensure the grounding stability, two nuts are provided at an interval from top to bottom at each access point.

In this embodiment, downside all is provided with steel reinforcement cage's interior stirrup 7 on the nut inner end, and the nut inner welds with the interior stirrup welding of its upper and lower side two-sidedly, and the hot-galvanize processing need be done in the nut outside, and interior stirrup passes through iron wire cross ligature with steel reinforcement cage's main muscle 6, and the access point passes through the nut after the concrete pole setting, and interior stirrup is connected with the main muscle of pole and realizes ground connection, and the access point passes through the nut down, and interior stirrup is connected with the main muscle of pole and realizes ground connection.

In this embodiment, the inner stirrup and the main reinforcement are bound by using a cross iron wire no less than #20, the two ends of the inner stirrup are folded and bent to form an angle of 60 degrees and pass through the binding points, and the two ends of the inner stirrup are hooked by iron hooks and rotated for 5-6 circles, so that the binding firmness is ensured.

In this embodiment, the inner stirrup and the binding part between the inner stirrup and the main bar are coated with power grease, and the coating thickness is not less than 0.2 mm.

In this embodiment, the nut is internally coated with electric grease, the coating thickness is not less than 0.2mm, and a plastic factory protection bolt is screwed in the nut.

If this patent discloses or refers to parts or structures that are fixedly connected to each other, the fixedly connected may be understood as: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In the description of this patent, it is to be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the patent, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

The above-mentioned preferred embodiments, further illustrating the objects, technical solutions and advantages of the present invention, should be understood that the above-mentioned are only preferred embodiments of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A concrete pole internal grounding method is characterized by comprising the following steps:

2. A concrete pole internal grounding method as set forth in claim 1, wherein: the access point of upper portion sets up in 2 meters departments apart from the tip top, and the access point setting of lower part is 0.5 meters above the pole buried depth line.

3. A concrete pole internal grounding method as set forth in claim 1, wherein: two screw caps are arranged at the upper part and the lower part of each access point at intervals.

4. A concrete pole internal grounding method as set forth in claim 1, wherein: the lower side all is provided with the interior stirrup of steel reinforcement cage on the nut inner end, and the nut inner welds with the interior stirrup of its upper and lower side, and interior stirrup passes through the iron wire ligature with the main muscle of steel reinforcement cage.

5. A concrete pole internal grounding method as set forth in claim 4, wherein: and the inner stirrups, binding positions of the inner stirrups and the main reinforcements are coated with electric grease, and the coating thickness is not less than 0.2 mm.

6. A concrete pole internal grounding method as set forth in claim 1, wherein: the interior of the nut is coated with electric grease, the coating thickness is not less than 0.2mm, and a plastic factory-leaving protection bolt is screwed in the nut.