JP6314293B1 - Plate member of ground electrode - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plate member of a grounding electrode which can be easily aligned when connecting a plate-like grounding member and a long rod-shaped grounding member. SOLUTION: It is used as a grounding electrode for burying in the ground and releasing grounding current to the ground, and is electrically connected to one end of a long rod-shaped grounding member that can be driven into the ground via a connecting pin. It is a plate-like member to be connected, and is composed of a central step portion 12 that is located at the center in the width direction and has a step from the central flat portion 11 and a central flat portion 11 that is flush with the extending portion 13. The center portion, the end portion 14 positioned at the end in the width direction, and the extending portion 13 that connects the center portion and the end portion 14 in a flush manner, have two different diameters for inserting a connection pin. A plurality of large-diameter hole portions 16 and small-diameter hole portions 17 are opened at locations other than the extended portion 13, and a viewing window portion 18 wider than the opening area of the large-diameter hole portion 16 is opened at a location excluding the extended portion 13. Has been. [Selection] Figure 1

Description

  The present invention relates to a grounding electrode for burying in the ground in a place close to a power pole or the like to ground a power facility, and more particularly to a plate-like member used for the grounding electrode.

   In order to prevent accidents caused by lightning strikes and leakages, grounding measures are mandatory for utility poles that lay power facilities such as transformers, lightning arresters, and high-voltage equipment, according to the ministerial ordinances that establish technical standards for electrical equipment. As a grounding measure, there is a grounding work in which a grounding electrode is buried in the ground in the vicinity of the power pole, and the grounding electrode is connected to a grounding terminal attached to the power pole in order to relay the grounding electrode and power equipment. . When the grounding work is performed, if an abnormal current occurs that hinders the operation of the power equipment, the abnormal current flows to the grounding electrode via the grounding terminal, and the abnormal current is released from the grounding electrode to the ground. It becomes possible to prevent the failure of the power equipment. The grounding electrode used in the grounding work is mainly a bar-shaped grounding rod having conductivity, or a connecting-type grounding rod that can be driven deep into the ground by connecting the grounding rods (Patent Document 1 and Patent Document) 2).

  By the way, in the grounding work, the grounding resistance value required for each type of power equipment is determined by the above-mentioned ministerial ordinance, and the grounding electrode must be buried at a depth of 75 cm or more from the ground surface. Has been. Therefore, in grounding work using conventional grounding rods or connected grounding rods, an inverted conical hole is excavated, and the grounding rod or connected grounding rod is driven into the ground with a hammer or the like from the bottom of the hole and buried. Was. Here, when the grounding resistance of the buried grounding rod etc. is less than the grounding resistance value specified by the Ministerial Ordinance, a new hole for excavation is newly drilled at a position away from the grounding rod etc. It was necessary to repeat this until the ground resistance met the ground resistance value specified by the Ministerial Ordinance.

  From such a problem, it is possible to perform construction without taking time and to further reduce the grounding resistance, a long first grounding member that can be driven into the ground, and a first grounding member A ground having a plate-like second grounding member electrically connected to one end of the lead wire and a lead wire connected to the first grounding member or the second grounding member and connected to a grounding wire through which a grounding current flows. A pole and its construction method are disclosed (see Patent Document 3).

  FIG. 46 is a diagram showing a configuration of a conventional ground electrode. A lead wire 95 is connected to the plate-like member 91 corresponding to the second grounding member, and the first grounding member including the tip portion 92 and the connecting portion 93 and the plate-like member 91 are connected by a connection pin 94. Yes.

Japanese Utility Model Publication No. 49-52036 JP 09-298073 A JP 2010-146938

  However, in the conventional grounding electrode, when the plate-shaped member and the first grounding member are connected, the connection pin must be aligned with one end of the first grounding member through the hole formed in the plate-shaped member. However, since the first grounding member has already been driven into the ground, there is a problem that alignment is difficult and work efficiency is poor.

  Accordingly, the present invention has been made in view of the above problems, and a plate of a grounding electrode that can be easily aligned when a plate-shaped grounding member and a long rod-shaped grounding member are connected. An object is to provide a shaped member.

  In order to solve the above-mentioned problems, the plate-like member of the ground electrode according to the present invention is used as a ground electrode for burying in the ground and releasing the ground current to the ground, and is a long rod-shaped member that can be driven into the ground. A plate-like member that is electrically connected to one end of the grounding member via a connecting pin, a central portion located at the center in the width direction, an end portion located at the end in the width direction, and the central portion A plurality of circular holes having different diameters for inserting the connecting pins, each having a plurality of openings except for the extending portion. It is characterized by.

  According to this, when connecting a plate-shaped grounding member and a long rod-shaped grounding member, it is possible to easily align the connecting pins.

  Here, it is preferable that a window portion wider than the opening area of the larger diameter of the circular hole portion is opened at a place excluding the extending portion.

  According to this, it is possible to confirm the position of the end of the long rod-shaped first grounding member that has already been driven into the ground from the window, and the connection pin is easily aligned, inserted, and connected. be able to.

  Further, the central portion is composed of a central flat portion that is flush with the extending portion, and a central step portion that is located at the center in the width direction and has a step from the central flat portion, and the central step portion includes the central step portion. It is preferable that the circular hole is opened.

  Furthermore, it is preferable that the extending portion is formed in a bellows shape, and is deformed and elongated in a net shape in the width direction.

  Thereby, according to the condition of the positional relationship between the long rod-shaped first grounding member and the plate-like member, the connection position between them can be adjusted.

  As described above, according to the plate-like member of the ground electrode according to the present invention, alignment can be easily performed when the plate-like ground member and the long rod-like ground member are connected.

It is a top view which shows the structure of the plate-shaped member of the ground electrode which concerns on this Embodiment. It is a right view of FIG. It is a bottom view of FIG. It is a front view of FIG. It is a perspective view from the bottom side. It is a figure which shows the structure of the ground electrode using the plate-shaped member of a ground electrode. It is a top view which shows the structure of the plate-shaped member of the ground electrode which concerns on 2nd Embodiment. FIG. 8 is a right side view of FIG. 7. FIG. 8 is a bottom view of FIG. 7. FIG. 8 is a front view of FIG. 7. It is a perspective view from the bottom side. It is a top view which shows the state which extended the extending | stretching part of the plate-shaped member of the ground electrode which concerns on 2nd Embodiment. It is a front view of FIG. It is a perspective view from the bottom side. It is a top view which shows the state which extended | stretched the extending | stretching part of the plate-shaped member of the ground electrode which concerns on 2nd Embodiment. FIG. 17 is a front view of FIG. 16. It is a perspective view from the bottom side. It is a top view which shows the structure of the plate-shaped member of the ground electrode which concerns on 3rd Embodiment. It is a right view of FIG. It is a bottom view of FIG. It is a front view of FIG. It is a perspective view from the bottom side. It is a top view which shows the state which extended the extending | stretching part of the plate-shaped member of the ground electrode which concerns on 3rd Embodiment. It is a front view of FIG. It is a perspective view from the bottom side. It is a top view which shows the state which extended | stretched the extending part of the plate-shaped member of the ground electrode which concerns on 3rd Embodiment further. It is a front view of FIG. It is a perspective view from the bottom side. It is a top view which shows the structure of the plate-shaped member of the ground electrode which concerns on 4th Embodiment. FIG. 30 is a right side view of FIG. 29. FIG. 30 is a bottom view of FIG. 29. FIG. 30 is a front view of FIG. 29. It is a perspective view from the bottom side. It is a top view which shows the state which extended the extending | stretching part of the plate-shaped member of the ground electrode which concerns on 4th Embodiment. FIG. 35 is a front view of FIG. 34. It is a perspective view from the bottom side. It is a top view which shows the state which extended | stretched the extending | stretching part of the plate-shaped member of the ground electrode which concerns on 4th Embodiment further. FIG. 38 is a front view of FIG. 37. It is a perspective view from the bottom side. It is a top view which shows the structure of the plate-shaped member of the ground electrode which concerns on 5th Embodiment. It is a right view of FIG. It is a bottom view of FIG. It is a front view of FIG. It is a perspective view from the bottom side. It is a top view which shows the state which extended the extending | stretching part of the plate-shaped member of the ground electrode which concerns on 5th Embodiment. It is a front view of FIG. It is a perspective view from the bottom side. It is a top view which shows the state which extended | stretched the extending | stretching part of the plate-shaped member of the ground electrode which concerns on 5th Embodiment further. FIG. 49 is a front view of FIG. 48. It is a perspective view from the bottom side. It is a figure which shows the structure of the conventional ground electrode.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing the configuration of the plate-like member of the ground electrode according to the present embodiment. 2 is a right side view, FIG. 3 is a bottom view, and FIG. 4 is a front view. FIG. 5 is a perspective view seen from the bottom side.

  The plate-like member 1 of the ground electrode according to the present embodiment is a plate-like ground member used as a ground electrode for burying in the ground near a utility pole or the like to release a ground current to the ground.

  The plate-like member 1 is made of a metal such as copper having good conductivity, and is located at the center of the flat plate-like central flat portion 11 and in the center in the width direction, and has a step from the flat plate of the central flat portion 11 in a convex shape. The central step portion 12 formed in this manner, the extending portion 13 that is flush with the central flat portion 11 at both ends in the width direction, and the end portions 14 that are flush with the extending portion 13 and are located at both ends in the width direction. I have. The central portion in the width direction of the plate-like member 1 is constituted by the central flat portion 11 and the central step portion 12.

  The central step portion 12 has a large-diameter hole portion 16 which is a hole for inserting a connection pin for coupling with a long rod-shaped first grounding member that can be driven into the ground, and a large-diameter hole portion 16. A small-diameter hole 17 having a smaller diameter and a viewing window 18 that is a hole for allowing the end of the first grounding member to be confirmed when the connecting pin is inserted are opened. A lead terminal 15 for connecting the lead wire 9 is also provided on the upper surface of the central step portion 12. A large-diameter hole portion 16 and a small-diameter hole portion 17 are also opened at the end portions 14 at both ends. The large-diameter hole portion 16 is a hole for 14φ, and the small-diameter hole portion 17 is a hole for 10φ, which is a circular hole portion having two different diameters. Further, the viewing window 18 is opened wider than the opening area of the large-diameter hole 16.

  FIG. 6 is a diagram illustrating a configuration of a ground electrode using a plate-like member of the ground electrode.

  One end of a long rod-shaped first grounding member provided with a tip portion 6 and a connecting portion 7 is electrically connected to the plate-like member 1 by a connection pin 8. At this time, a plurality of large-diameter hole portions 16 and small-diameter hole portions 17 are opened in the central step portion 12 and the end portion 14 at the center, respectively, so that the first grounding member and the plate-like member 1 according to the situation. The connection position can be adjusted. Further, since the position of the end portion of the first grounding member already driven into the ground can be confirmed from the viewing window portion 18 drilled in the central step portion 12, it is easily aligned and connected. It becomes possible to insert the pin 8 for use.

  7 is a plan view showing a configuration of a plate-like member of the ground electrode according to the second embodiment, FIG. 8 is a right side view, FIG. 9 is a bottom view, and FIG. 10 is a front view. FIG. 11 is a perspective view seen from the bottom side.

  The plate-like member 2 according to the second embodiment is different from the plate-like member 1 according to the first embodiment in that the extending portion 23 is configured to be extendable. Hereinafter, this difference will be mainly described.

  The extending portion 23 that is continuous with the central flat portion 21 toward both ends is formed in a bellows shape, and when the end portion 24 is grasped and pulled, the extending portion 23 is configured to deform and extend in a net shape in the width direction. Yes.

  FIG. 12 is a plan view showing a state in which the extending portion 23 of the plate-like member 2 is extended, and FIG. 13 is a front view thereof. FIG. 14 is a perspective view seen from the bottom side. 12 to 14 show a state in which the stretched portion 23 is stretched by about 50%, that is, about half.

  FIG. 15 is a plan view showing a state where the extending portion 23 is further extended, and FIG. 16 is a front view thereof. FIG. 17 is a perspective view seen from the bottom side. 15 to 17 show a state in which the extending portion 23 is 100% as the degree of extension, that is, a state where it is completely extended.

  As described above, the extending portion 23 is configured to be extendable step by step so that the connection position between the first grounding member and the plate-like member 2 can be adjusted according to the situation of the positional relationship between the first grounding member and the plate-like member 2. Become.

  18 is a plan view showing the configuration of the plate-like member of the ground electrode according to the third embodiment, FIG. 19 is a right side view, FIG. 20 is a bottom view, and FIG. 21 is a front view. FIG. 22 is a perspective view seen from the bottom side.

  In the plate-like member 3 according to the third embodiment, in addition to the large-diameter hole portion 36 and the small-diameter hole portion 37 at the center step portion, a plurality of viewing window portions 38 are opened. It is different from the form. By providing the plurality of viewing windows 38 in this way, the first grounding member and the plate-like member 3 can be more easily aligned.

  FIG. 23 is a plan view showing a state in which the extending portion 33 of the plate-like member 3 is extended by 50%, and FIG. 24 is a front view thereof. FIG. 25 is a perspective view seen from the bottom side.

  FIG. 26 is a plan view showing a state in which the extending portion 33 is further extended by 100% and FIG. 27 is a front view thereof. FIG. 28 is a perspective view seen from the bottom side.

  FIG. 29 is a plan view showing the configuration of the plate-like member of the ground electrode according to the fourth embodiment, FIG. 30 is a right side view, FIG. 31 is a bottom view, and FIG. 32 is a front view. FIG. 33 is a perspective view seen from the bottom side.

  The plate-like member 4 according to the fourth embodiment is different from the plate-like member 3 of the third embodiment in the arrangement pattern of the large-diameter hole portion 46, the small-diameter hole portion 47, and the observation window portion 48.

  34 is a plan view showing a state in which the extending portion 43 of the plate-like member 4 is extended by 50%, and FIG. 35 is a front view thereof. FIG. 36 is a perspective view seen from the bottom side.

  FIG. 37 is a plan view showing a state in which the extending portion 43 is further extended by 100% and FIG. 38 is a front view thereof. FIG. 39 is a perspective view seen from the bottom side.

  40 is a plan view showing a configuration of a plate-like member of the ground electrode according to the fifth embodiment, FIG. 41 is a right side view, FIG. 42 is a bottom view, and FIG. 43 is a front view. FIG. 44 is a perspective view seen from the bottom side.

  The plate-like member 5 of the fifth embodiment has a large-diameter hole portion 56, a small-diameter hole portion 57, and a viewing window portion 58 opened in the central step portion 52, and a large-diameter hole portion 56 and a small-diameter hole portion 57 at the end portions, respectively. In addition to opening, the central flat portion 51 is different from the above embodiments in that a large diameter hole portion 56 and a small diameter hole portion 57 are opened. Thus, by opening the large-diameter hole portion 56 and the small-diameter hole portion 57 in the portion excluding the extending portion of the plate-like member 5, it can cope with all situations of the positional relationship between the first grounding member and the plate-like member 5. It is possible to adjust the connection position.

  45 is a plan view showing a state in which the extending portion 53 of the plate-like member 5 is extended by 50%, and FIG. 46 is a front view thereof. FIG. 47 is a perspective view seen from the bottom side.

  FIG. 48 is a plan view showing a state in which the extending portion 53 is further extended by 100% and FIG. 49 is a front view thereof. FIG. 50 is a perspective view seen from the bottom side.

  According to the plate-like member of the ground electrode configured as described above, there are a plurality of holes having different diameters for inserting the connecting pins into portions other than the extending portion, such as the center portion and both end portions in the width direction of the plate-like member. Since it is opened, it is possible to easily align the plate-shaped grounding member and the long rod-shaped grounding member.

  As mentioned above, although the plate-shaped member of the ground electrode according to the present invention has been described based on the embodiment, the present invention is not limited to this, can achieve the object of the present invention, and does not depart from the gist of the invention. Various design changes are possible within the scope, and they are all included in the scope of the present invention.

  For example, in each of the above embodiments, the central step portion is provided with a step from the flat plate of the central flat portion in a convex shape. However, the central step portion may be formed with a concave step. Although the central step portion is provided, the central portion may be configured as a flat plate continuous with the central flat portion without providing the central step portion.

  Moreover, although the observation window portion is provided in the central step portion, it may be provided in the central flat portion or the end portion. Furthermore, although a rectangular viewing window is illustrated, the opening shape of the viewing window is not limited to a rectangle, and may be an elliptical shape.

  The plate-like member of the ground electrode according to the present invention is useful as a component of the ground electrode for burying in the ground near a utility pole or the like to release the ground current to the ground.

1, 2, 3, 4, 5, 91 Plate-like member 6, 92 Tip portion 7, 93 Connection portion 8, 94 Connection pin 9, 95 Lead wire 11, 21, 31, 41, 51 Center flat portion 12, 22 , 32, 42, 52 Center step portion 13, 23, 33, 43, 53 Extending portion 14, 24, 34, 44, 54 End portion 15, 25, 35, 45, 55 Lead terminal 16, 26, 36, 46, 56 Large-diameter hole 17, 27, 37, 47, 57 Small-diameter hole 18, 28, 38, 48, 58 Viewing window

Claims (4)

A plate that is embedded in the ground and used as a grounding electrode to release grounding current to the ground, and is electrically connected to one end of a long rod-shaped grounding member that can be driven into the ground via a connecting pin Shaped member,
A center portion located at the center in the width direction, an end portion located at the end in the width direction, and an extending portion that connects the center portion and the end portion flush with each other,
A plate-like member of a grounding electrode, wherein a plurality of different types of circular hole portions with different diameters for inserting the connection pins are opened at locations excluding the extending portion. Furthermore, the window part wider than the opening area of the larger diameter of the said circular hole part is opened in the location except the said extension part. The plate-shaped member of the grounding electrode of Claim 1 characterized by the above-mentioned. The central part is
A central flat portion continuous with the extending portion; and
It is located at the center in the width direction, and is composed of a central step portion with a step from the central flat portion,
The plate-shaped member of the grounding electrode according to claim 1 or 2, wherein the circular hole is opened in the central stepped portion. The plate member of the ground electrode according to any one of claims 1 to 3, wherein the extending portion is formed in a bellows shape and deforms and extends in a net shape in the width direction.