JPS6362173A - Impactproof current earth pole - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Purpose of the Invention) A. Field of Industrial Application The present invention aims to protect power transmission and distribution lines from shock currents generated by electric shocks, etc. This invention relates to an anti-shock current grounding electrode that provides a discharge effect.

W. Conventional technology The prior art of the earth electrode that utilizes the dead weight of the utility pole is Japanese Patent Publication No. 52-40424, which was previously filed by the present applicant.
A typical example is ``Method and Structure of Burying Spiral-shaped Push-in Earth'', which is a spiral-shaped round bar earth 81Ia installed at the bottom of a utility pole, as shown in Figures 7 and 8.
The utility pole (a) is pushed into the soil by its own weight, and the entire circumferential surface of the earth pole (a) is brought into close contact with the soil, and a chemical solution for reducing ground resistance is permeated to improve the conductivity of the soil. The aim is to improve the ground contact effect.

C1 Problems to be Solved by the Invention The above-mentioned conventional technology uses the pole's own weight to push the spiral earth pole installed at the bottom of the pole into the soil, bringing the entire circumferential surface of the round rod into close contact with the soil. This provides a sufficient grounding effect against overvoltages caused by so-called steady currents other than electric shocks, but it has been pointed out that when an impact current occurs, surface contact of the earth electrode with the soil has an extremely small discharge effect. Ta.

In other words, in order to discharge the shock current most effectively, it is necessary to bury a ground electrode with a large number of needle-like protrusions in soil with good conductivity, and discharge all at once from the tips of the sharp needle-like protrusions. .

(Structure of the Invention) Means for Solving 21 Problems The present invention is installed at the bottom of a utility pole installation hole, and a large number of needle-like protrusions are pushed into the soil using the own weight of the installed utility pole. The present invention relates to an anti-shock current grounding electrode that effectively discharges shock current, and embodiments thereof will be described below with reference to the drawings.

E. Example FIGS. 1 and 2 show the grounding body 1. and 2. Similar to the circular support plate 36, 4. is a discharge needle made of a good conductive metal and has an appropriate length, and has a sharp tip 4. has.

This discharge needle 2. is the support plate 3. are arranged in an annular manner on the lower surface of each, each having a sharp tip 4. It is formed in a substantially vertical position below.

5 in the diagram. is the support plate 3. This is a lead wire connected to the end of the support plate 3. The upper surface is insulated with resin material @6.
is listed.

Figures m3 and 4 show a cone shaped like a cone with the top cut off. The upper end surface shows the annularly arranged discharge needles 2. The diameter is large enough to fit inside the

"Anti-impact current grounding pole" of the present invention configured as described above
First, the utility pole installation hole 8. is drilled as shown in Figure 5. Pyramid body 7. Place the discharge needle 2. on the trowel surface at 8°. tip 4
．． Place the hole 9. Insert telephone pole b' into .

Large dust support plate 3. When telephone pole b' is placed above, telephone pole b
/, the discharge needle 2. Tip of 4. 8. Slide down the support plate 3. as shown in Figure 6. When the lower surface comes into contact with the upper end surface of the weight body 7°, the discharge needle 2. A predetermined portion of the tip is a built-in hole 9. It is pushed into the soil at the bottom in a radially expanded state. Support plate 3. Lead wire attached to 5. After connecting to the utility pole side, install hole 9. Backfill the gap and complete the work.

9 Functions and Effects As mentioned above, the present invention is carried out in conjunction with the installation work of utility poles. It can be constructed very easily by simply placing the pole in a large amount of dust and using the pole's own weight.

Discharge needle 2. Although many are arranged in a ring, the tip 4.
Since the pole is sharp and the resistance received by the soil is small, the utility pole can be easily pushed into the soil at the bottom, and the weight body 7. 8. At an angle along the annular discharge needle 2. are installed in a radially expanded state, creating an ideal shape for effectively discharging the shock current.

[Brief explanation of drawings]

Figure 1 shows grounding body 1. FIG. 2 is a plan view showing the same, and FIG. 2 is a side view as well. FIGS. 3 and 4 show the weight body 7. FIG. 2 is a plan view and a side view of 5 and 6 are side views related to construction, and FIGS. 7 and 8 are a side view and a plan view, respectively, related to the prior art. Note 1. Grounding body 3. Support plate 2, discharge needle 7. More than a cone

Claims (1)

[Claims] A grounding body in which discharge needles made of a good conductive metal and having appropriate lengths and sharp tips are arranged vertically in an annular manner via a homogeneous circular support plate, and a conical shape with the top cut off above the annular shape. An anti-shock current earthing electrode characterized in that it is composed of a weight body having a predetermined amount of small diameter and discharge needles arranged in the same direction.