JPH028365Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a grounding rod used for grounding, and in particular,
Related to grounding rods that are installed in conjunction with grounding materials.

[Summary of the idea]

The present invention provides a grounding rod that is installed in conjunction with a grounding material, by providing a lead-out hole in the peripheral wall of the grounding rod made of a conductive metal tube, so that the grounding rod can be connected to the ground through the opening at the rear end of the grounding rod. The fluid grounding material injected into the pipe can be guided outside the pipe, making it easy to achieve grounding with a large grounding effect.

[Conventional technology]

Traditionally, in various electrical equipment such as power equipment and communication equipment, by electrically connecting the electrical equipment and the earth, it has been used to protect the human body and the electrical equipment from ground faults, etc., and to clarify communications. This is called grounding.

In electrical equipment that is grounded in this way, for example, a grounding rod made of carbon or metal connected to the electrical equipment is driven into the ground to maintain a sufficiently low resistance between the electrical equipment and the earth (so-called ground resistance). That's what I do.

Furthermore, for grounding in so-called high-resistivity areas where electrical resistivity is high, such as in mountains, grounding resistance can be reduced by improving the conductivity of the grounding rod and the soil near the grounding rod to form a pseudo-grounding body. A grounding material such as a so-called grounding resistance reducing agent is used in combination.

A construction method that uses both the above-mentioned grounding rod and grounding material is to drive the grounding rod into the bottom of a hole drilled on the ground surface in the form of a mortar, and to flow liquid grounding material into the hole on the ground surface. A so-called inflow method is used in which the grounding material is infiltrated into the soil around the grounding rod to form a pseudo grounding body.

[Problem that the invention attempts to solve]

By the way, grounding using the above-mentioned inflow method has the disadvantage that the grounding material does not penetrate widely into the soil because it penetrates through the hole on the ground surface, and it is not possible to obtain a sufficiently low grounding resistance. In the worst case scenario, there was a risk of a ground fault occurring.

Therefore, in view of the above-mentioned problems, the present invention was developed by
The purpose of the present invention is to provide a grounding rod with a novel configuration that can easily realize grounding with a large grounding effect by widely permeating the grounding material into the soil.

[Means for solving problems]

In order to solve the above-mentioned conventional problems, the grounding rod according to the present invention is formed of a tube made of conductive metal, and a fluid grounding material is injected into the tube from the opening on the rear end. A single ground rod having a lead-out hole provided at least in the peripheral wall portion on the distal end side thereof, a joint made of a conductive metal that connects the single ground rod in a communicating state, and a large diameter portion larger than the outer diameter of the single ground rod. a plunger member formed in a conical shape and having a part for attaching to the single ground rod in the large diameter part; and a conductive metal lead having a part for attaching to the single ground rod at the lead-out part of the lead wire; The ground rod is connected in communication with the ground rod through the joint to form a ground rod main body, and the plunge member is attached to the tip of the ground rod main body, and the lead wire is connected to the rear end of the ground rod body. A grounding rod characterized by being equipped with a lead-out member.

[Effect]

In the grounding rod according to the present invention, the plunger member formed in a conical shape having a large diameter portion larger than the outer diameter of the grounding rod alone facilitates driving. The conductive metal joint allows the ground rods to be connected to each other in a communicating manner to a required length. Furthermore, by providing a lead-out hole in the peripheral wall of the ground rod made of a conductive metal tube, the fluid grounding material injected into the pipe from the opening on the rear end of the ground rod can be removed from the pipe. can lead to.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the embodiment shown in FIG. 1, the ground rod 10 is
The rear end of the first grounding rod 1 and the second grounding rod 1
1, a plunge member 20 attached to the tip of the ground rod, and a lead wire lead-out member 30 attached to the rear end of the ground rod. It's on.

Here, the first and second ground rod units 1 and 11
The electrode is made of a conductive metal tube, such as a galvanized iron tube, and is designed to withstand the impact of being driven into the ground, which will be described later, and to function as a ground electrode for a long time underground. Furthermore, the first and second grounding rods 1 and 11 each include:
Lead-out holes 3, 13 are provided in the distal end side peripheral wall portions 4, 14 for guiding the fluid grounding material injected into the tube from the rear end side opening portions 2, 12 to the outside of the tube. Also,
As shown in FIG. 2, the plunger member 20 is formed into a downward conical shape having a large diameter portion 21 larger than the outer diameter of the single ground rod 1.
A mounting part 22 is formed in which the upper part 22a is slightly thinner than the inner diameter of the ground rod 1 and the lower part 22b is tapered to be slightly thicker than the inner diameter of the ground rod 1 so that the ground rod 1 can be easily mounted thereon. has been done. Furthermore, the lead wire deriving member 30 is
As shown in FIG. 3, a lead wire 32 is connected to a lead wire lead-out portion 31 provided at the rear end, and an upper portion 33a is connected to the ground rod 11 so that the ground rod 11 can be easily attached to the tip. A mounting portion 33 is formed with a taper that is slightly thicker than the inner diameter of the ground rod unit 11 and whose lower part 33b is slightly thinner than the inner diameter of the ground rod unit 11. Moreover, the above-mentioned joint 40 is
As shown in FIG. 4, it is made of a tube having a communication hole 44, and has an upper part 41a slightly larger than the inner diameter of the ground rod 1 so that the rear end of the first ground rod 1 can be easily attached to the lower end. One attachment part 41 is thick and has a tapered lower part 41b that is slightly thinner than the inner diameter of the ground rod single body 1. The other mounting part 43 is formed symmetrically to the one mounting part 41 so that the tip of the second ground rod unit 11 can be easily mounted. moreover,
The joint 40 connects the first and second ground rods 1 and 11 in a communicating state, and functions as a ground electrode for a long time underground together with the first and second ground rods 1 and 11. It is made of conductive metal.

As shown in FIG. 5, the grounding rod 10 is driven into the ground almost vertically by an electric hammer or the like, and forms a grounding structure 50 together with a pseudo-grounding body 51 made of grounding material. That is, first, the first grounding rod unit 1 with the plunger member 20 attached to its tip is driven into the ground. At the time of this driving, the plunge member 20 cuts through the soil and the large diameter portion 21 forms a hole that is slightly thicker than the ground rods 1 and 11, so it is possible to perform this driving relatively easily. Next, a grounding material that exhibits a low electrical resistivity in the soil is dissolved in water and injected through the rear end opening 2 of the grounding rod 1 and flowing out through the outlet hole 3 to form a gap between the grounding rod and the soil. Insert it into the soil and allow it to penetrate into the soil. Furthermore, the second ground rod 11 is connected to the rear end of the ground rod 1 through the joint 40 and driven into the ground, so that the ground rod 11 flows through the rear end opening 12. Inject the grounding material into the above-mentioned lead-out holes 3 and 13.
It flows out to fill the gap between the grounding rod and the soil and permeates into the soil. Finally, the lead wire deriving member 30 with the lead wire 32 attached thereto is attached to the rear end of the ground rod unit 11, and the lead wire 32 is connected to the electrical equipment 52. The grounding structure 50 formed as described above is grounded by a very large pseudo-grounding body 51 around the grounding electrode 10 formed from the grounding material that has flowed out from the lead-out holes 3 and 13 and permeated into the soil. You can get the effect.

Note that the grounding rod used in the present invention is not limited to a grounding rod made by connecting two of the above-mentioned grounding rods, but may also be one in which a plunger member and a lead wire lead-out portion are connected to a single grounding rod. It is possible to connect a large number of single ground rods with joints up to a long length. Further, as the grounding material, for example, a material mainly composed of calcined sludge obtained through water treatment may be used by dissolving it in water, or other fluid materials that increase the grounding effect may be used. It is also possible.

[Effect of idea]

According to the grounding rod according to the present invention, it is possible to easily drive the grounding rod by using the plunger member formed in a conical shape having a large diameter portion larger than the outer diameter of the grounding rod alone.
The conductive metal joint allows the ground rods to be connected to each other in a communicating manner to a required length. Furthermore, by providing an outlet hole in the peripheral wall of the grounding rod made of a conductive metal pipe, the fluid grounding material injected into the pipe from the opening on the rear end of the grounding rod can be removed from the pipe. It is possible to easily achieve grounding with a large grounding effect.

[Brief explanation of drawings]

Fig. 1 is a front view showing the configuration of an embodiment of the grounding rod according to the present invention, Fig. 2 is a front view showing the plunger member constituting the above embodiment, and Fig. 3 is a front view showing the structure of the above embodiment. Front view showing the lead wire lead-out member, No. 4
The figure is a partially longitudinal front view showing a joint constituting the above-mentioned embodiment, and FIG. 5 is a schematic diagram showing a grounding structure using the above-mentioned grounding rod. 1, 11...Earth rod alone, 3, 13...Leading hole, 10...Earth rod, 20...Plunging member, 30...
...Lead wire lead-out member, 40...Joint.

Claims (1)

[Claims for Utility Model Registration] A tubular body made of a conductive metal, with an outlet hole provided in at least the peripheral wall on the distal end side to guide a fluid grounding material injected into the pipe from the opening on the rear end side to the outside of the pipe. a conductive metal joint that connects the ground rod single body in a communicating state; and a lead wire lead-out member made of a conductive metal, the lead-out part of which is provided with a part for attaching the ground rod to the single ground rod; The ground rod body is connected in a communicating state through the joint, and the plunger member is attached to the tip of the ground rod body, and the lead wire lead-out member is attached to the rear end of the ground rod body. ground rod.