JP2000287322A - Device raising for of grounding pin for working - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase working efficiency and safety by including a middle part constituted of a detachable member which supports an insertion supporting part in a bendable manner between an inserting part inserted into a fixed member and the insertion supporting part for a grounding pin for working. SOLUTION: A detachable part 30 is constituted of an inserting part 31 inserted into a fixed member 20, an insertion supporting part 32 inserted with an earthing pin for working for supporting, and an intermediate part positioned at the midpoint between the inserting part 31 and the insertion supporting part 32 and supporting the insertion supporting part 32 in a bendable manner. The middle part is formed with a pair of supporting fittings 33C whose upper part is fixed to both sides of a fixing fitting by means of bolts and nuts 33B. There are also provided a fixed part 33F involving a ratchet mounted at the lower part thereof and a movable part 33H with the upper part rotating around the fixed part 33F and a claw 33G whose upper part is engaged with the ratchet, and a movable part 33H whose lower part is fixed to the top surface of the stopper 31A of the inserting part 31. A ratchet mechanism is provided which includes a rotation stopper 331 press-contacting with the movable 33H for prevention of the rotation of the insertion supporting part 32 if the insertion supporting part 32 rotates by 90 degrees or more.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earthing rod erecting device for use in grounding a bus in order to ensure safety in indoor and outdoor electric facilities such as a substation.

[0002]

2. Description of the Related Art When a power outage operation is performed in indoor and outdoor electric facilities such as a substation, a bus is grounded to ensure safety. Unlike the mechanical grounding of the line-side disconnector for grounding the power transmission line, the busbar grounding is performed using a working grounding rod (also referred to as a hook rod) because the frequency of use is low. Specifically, the other end of the ground wire connected to the clamp mounted on the tip of the work ground rod is connected to the ground wire laid underground, and the ground mounted on the gantry of the electrical equipment. After connecting to the copper strip, the work ground rod is raised, and the clamp is connected to a grounded metal fitting attached to the bus bar that has fallen to the electric device.

[0003] In the 275 KV substation, the length of the working ground rod is as long as 6.5 m, and its weight is as heavy as 7.5 kg. For this reason, as shown in FIG.
After connecting the grounding wire 1B to the grounding copper band 3A mounted on the frame 3 of the electrical equipment 2 and the electrical equipment 2, the working grounding rods 1 are fixed in pairs by one person, and one person fixes the base of the working grounding rod 1 to the ground. Another person raises the working ground rod 1. Then, the clamp 1A of the standing work ground rod 1 is connected to the grounded metal fitting 5 attached to the bus bar 4 that has fallen to the electric device 2.

[0004]

In this prior art, two workers are required to stand up the working grounding rod 1, and the standing working grounding rod 1 is supported only by the worker. Therefore, the working ground rod 1 is largely shaken and is in an unstable state. Therefore, this conventional technique has problems in terms of work efficiency and work safety.

[0005] The present invention has been made for the purpose of solving such problems of the prior art.

[0006]

Means for solving the above problems will be described below with reference to FIGS. 1 and 2 corresponding to an embodiment. According to the present invention, the fixing member 20, the insertion portion 31 inserted into the fixing member 20, and the working ground rod 1 are inserted.
Insertion support part 32 supported, insertion part 31 and insertion support part 3
2. A detachable member 30 comprising an intermediate portion 33 which is intermediate between the two and which supports the insertion support portion 32 in a bendable manner.
It is composed of

[0007] In the above structure, the working ground rod 1 can be raised by one worker, and the raised working ground rod 1 is connected via the detachable member 30. Supported by the fixing member 20.

[0008]

1 and 2 show an embodiment of the present invention. 1 and 2, reference numeral 20 denotes a fixed member, and reference numeral 30 denotes a detachable member.

The fixing member 20 is formed from a square pipe,
It is erected underground. Alternatively, it is fixed to a fixing member protruding from the equipment stand. The use of square pipes
This is because the detachable member 30 is not rotated. Thereby, the attachment of the detachable member 30 is stabilized. Square pipe is
At □ 60, its length is 400 mm. Fixing member 2
A guide portion 21 for guiding the insertion of the detachable member 30 is provided at an upper end of the O, and a lower end thereof is formed in a tapered shape. The reason why the taper is formed is that it is easy to stand in the ground by hitting a hammer.

In order to facilitate the installation of the fixing member 20 by hammering, as shown in FIG.
The cross-shaped member 23 may be fixed on the upper part. As the cruciform member 23, an L50 × 6-500 equilateral angle iron is used. When digging a hole and fixing it with concrete or fixing it to a fixing member protruding from an equipment stand, it is not necessary to make the lower end thereof tapered. The square pipe is not limited to a square, but may be a rectangle. Also, the fixing member 2
0 may be constituted by a round pipe.

A cap 22 is detachably mounted on the guide portion 21. The cap 22 allows the fixing member 2
Inundation to zero is prevented. The cap 22 has a plate 22A of □ 80 and a □ fixed to the lower surface of the plate 22A.
50 and a square pipe 22B having a length of 50 mm. The ground height of the plate 22A is set to such an extent that it does not hinder patrol on the premises.

The detachable member 30 includes an insertion portion 31 inserted into the fixing member 20, an insertion support portion 32 into which the working ground rod 1 is inserted and supported, and an insertion portion intermediate the insertion portion 31 and the insertion support portion 32. It is composed of an intermediate portion 33 that supports the support portion 32 in a freely bendable manner.

The insertion portion 31 is provided on the guide portion 21 of the fixing member 20.
Stopper 3 consisting of a □ 80 plate that abuts against
1A, □ 50 fixed to the lower surface of the stopper 31A,
It is formed from a square pipe 31B having a length of 170 mm.

The insertion support portion 32 includes a guide portion 32A formed of a φ114.3 reducer for guiding insertion of the working ground rod 1, and a φ60 connected to the lower end of the guide portion 32A.
And a support plate 32C, which is fixed to the lower end of the round pipe 32B and supports the working ground rod 1, is constituted by a plate of □ 80. Round pipe 3
2B is used because the working ground rod 1 is a round pipe and the working ground rod 1 can be easily rotated. The length of the insertion support part 32 is 620 mm
It is.

As shown in FIGS. 1, 2, and 3, the intermediate portion 33 has a U-shaped fixing bracket 33A fixed to the lower surface of the support plate 32C of the insertion supporting section 32, and bolts on both sides of the fixing bracket 33A. A pair of support brackets 33C whose upper parts are fixed by nuts 33B, and a fixing part 33F including a ratchet (not shown) bridged between the lower parts of the pair of support brackets 33C by bolts / nuts 33D and nuts 33E; Upper part is fixed part 3
A pawl 33G that pivots the 3F and is interlocked with the pawl in the middle is pivotally mounted, and a lower part is protruded downward from the fixing bracket 33A, and a movable part 33H whose lower part is fixed to the upper surface of the stopper 31A of the insertion part 31. When the insertion support portion 32 is rotated by 90 degrees or more, the tip of the insertion support portion 32 is pressed against the movable portion 33H and
And a rotation stopper 33I for preventing rotation of the ratchet mechanism.

When the work ground rod 1 is used, as shown in FIG. 4, the detachable member 30, the work ground rod 1, the clamp 1A and the ground wire 1B are transported to the site, and the work ground rod 1 is used. Attach the clamp 1A to the tip, and connect the ground wire 1
Connect B. Remove the cap 22 from the fixing member 20,
The detachable member 30 is inserted into the fixed member 20 such that the rotation stopper 33I is located on the left side (see FIG. 2). Rotate the pawl 33G clockwise to move the insertion support portion 32
When the is rotated clockwise, the movable portion 33H becomes a fixed portion and the fixed portion 33F becomes a movable portion, and makes the insertion support portion 32 horizontal. The pawl 33G is rotated counterclockwise to be locked with the pawl and maintain a horizontal state (see FIG. 2). The insertion support portion 32 cannot rotate clockwise due to the engagement between the pawl 33G and the ratchet wheel, but can rotate counterclockwise.

The worker leaves the place of the fixing member 20 and
The operator moves to the place of the work ground rod 1 and inserts the work ground rod 1 into the insertion support portion 32. Thus, the working ground rod 1 having one end fixed to the fixing member 20 via the detachable member 30
Stand up. In the process of standing, even if the work ground rod 1 is released, the work ground rod 1 does not rotate clockwise by its own weight due to the engagement between the pawl 33G and the ratchet.

When the work grounding rod 1 stands upright, the state is maintained, and the work grounding rod 1 stands on its own. After that, the working ground rod 1 is lifted and operated, and the clamp 1A is connected to the grounded metal fitting 5 attached to the bus bar 4 that has fallen to the electric device 2.

In the process of erecting the working ground rod 1,
When the insertion support part 32 is rotated by 90 degrees or more, the rotation stopper 33I is pressed against the movable part 33H, and the rotation of the insertion support part 32 is prevented.

The working rod 1 can be raised by one worker. In addition, the standing work ground rod 1 is
Since it is guided and supported not only by the operator but also by the insertion support portion 32, the working ground rod 1 does not greatly shake,
It is in a stable state.

In the prior art, the working ground rod 1 is detached from the clamp 1A for safety because the lower end of the working ground rod 1 is free after the clamp 1A is connected to the metal fitting 5 to be grounded. Since the lower end is held by the insertion support portion 32, it is not necessary to remove the lower end from the clamp 1A. Therefore, the standing of the work grounding rod 1 indicates the grounding state.
It is possible to avoid an accident of energizing due to a mistake.

The above is the case where the intermediate portion 33 is constituted by a ratchet mechanism. However, as shown in FIG. 5, the intermediate portion 34 may be constituted by a rotating mechanism. That is, the intermediate portion 34
A pair of upper fittings 34A whose upper ends are fixed to the lower surface of the support plate 32C of the insertion support portion 32 and face each other at a fixed interval.
And a lower metal fitting 3 whose lower end is fixed to the upper surface of the stopper 31A of the insertion portion 31 and is inserted between the pair of upper metal fittings 34A.
4B, a bolt / nut 34C that is inserted into the pair of upper fittings 34A and the lower fitting 34B and rotatably supports the pair of upper fittings 34A, and is inserted between the lower portions of the pair of upper fittings 34A. When 32 rotates more than 90 degrees,
One end is fixed to the upper fitting 34A by a screw 34E, and the other end is the upper fitting 34A. A rotation stopper 34D that presses against the side surface of the lower fitting 34B to prevent the rotation of the insertion support portion 32.
The spring plate 34I is inserted into a hole 34F formed in the lower metal fitting 34B and pressed against a steel ball 34H mounted in a hole 34G formed in the lower metal fitting 34B.

The spring plate 34I fixed to the pair of upper fittings 34A is brought into contact with the lower fitting 34B via the steel ball 34H, so that a pair of upper fittings 34A and lower fittings 34B are provided.
Between the upper metal fittings 34A
Prevents rotation due to its own weight.

The thickness of the upper fitting 34A is 6 mm, the interval between the upper fittings 34A is 11 mm, and the thickness of the lower fitting 34B is 9 m.
m, hole 34F is φ10, hole 34G is φ7, and steel ball 34H is φ9.

The fixing member 20, the detachable member 30
Are galvanized or rust-proof painted to prevent corrosion.

[0026]

As described above, the present invention provides:
A fixing member, an insertion portion to be inserted into the fixing member, an insertion support portion into which a working ground rod is inserted and supported, and an intermediate portion between the insertion portion and the insertion support portion, the insertion support portion being bent freely. And a detachable member constituted by an intermediate portion to be supported. Therefore, the erecting of the working ground rod can be performed by one worker,
The standing work ground rod is supported by a fixing member via a detachable member. Therefore, according to the present invention, it is possible to obtain an effect that the working efficiency and the working safety can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded front view of an upright state, showing one embodiment of the present invention.

FIG. 2 is a side view of the detachable member constituting the present invention, which is bent.

FIG. 3 is an exploded perspective view of an intermediate portion constituting the present invention.

FIG. 4 is a diagram showing a use state of the present invention.

FIG. 5 is an exploded perspective view showing another embodiment of the present invention in an upright state.

FIG. 6 is a diagram showing a conventional technique.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 work ground rod 1A clamp 1B ground wire 2 electric equipment 3 gantry 4 busbar 5 grounded metal fitting 20 fixing member 30 detachable member 31 insertion part 32 insertion support part 33 intermediate part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Masaki Kobayashi 6-9-7 Shimbashi, Minato-ku, Tokyo Inside Tokyo Electric Works Co., Ltd. (72) Inventor Hiroshi Ogawa 6-9-7 Shimbashi, Minato-ku, Tokyo Stock Company Tokyo Electric Works

Claims (9)

[Claims] 1. A fixing member, an insertion portion to be inserted into the fixing member, an insertion support portion into which a working ground rod is inserted and supported, and the insertion support intermediate the insertion portion and the insertion support portion. Grounding rod erecting device comprising a detachable member comprising an intermediate portion for supporting the portion so as to be freely bent. 2. The apparatus according to claim 1, wherein the fixing member is formed of a square pipe, is erected in the ground, and has a cap detachably attached thereto. 3. The apparatus according to claim 2, wherein the lower end of the square pipe is tapered. 4. The apparatus according to claim 3, wherein a cross member is fixed to an upper portion of the square pipe. 5. The working rod according to claim 1, wherein the fixing member is formed of a square pipe, is fixed to the fixing member protruding from the equipment stand, and is removably mounted with a cap. apparatus 6. The guide according to claim 2, wherein a guide portion for guiding insertion of the detachable member is provided at an upper end of the square pipe, and a cap is attached to the guide portion. Grounding rod erecting device for work 7. The working ground rod erecting device according to claim 1, wherein the insertion portion comprises a square pipe, the insertion support portion comprises a round pipe, and the intermediate portion comprises a ratchet mechanism. 8. The work-ground-rod erecting device according to claim 1, wherein the insertion portion comprises a square pipe, the insertion support portion comprises a round pipe, and the intermediate portion comprises a rotating mechanism. 9. A guide portion for guiding insertion of a working ground rod at a tip of a round pipe.
The described work ground rod erecting device