JP2008206253A - Indirect hot-line tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indirect hot-line tool for the overhead distribution line of 20 kV grade system, by which indirect hot-line can be carried out by an uninterruptible electrical method, instead of a manipulator method, by improving the indirect hot-line tool used in the indirect hot-line work of a 6 kV grade overhead distribution line. <P>SOLUTION: The indirect hot-line tool such as pliers or the like to be used in the indirect hot-line work of a 20 kV grade overhead distribution line has an insulation distance L11 of at least 110 cm from the tip end of an insulation operating rod 2 to the limit collar 20a on the lower end side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an indirect hot wire tool such as Yatco used for indirect hot wire work, and more particularly to an indirect hot wire tool used for indirect hot wire work of a 20 kV class overhead distribution line which is a special high voltage live wire.

  The 20 kV class overhead distribution lines have less power loss and larger transmission capacity than the generally used 6 kV class overhead distribution lines, so it is necessary to actively utilize them including the existing systems. The 20kV-class new overhead power distribution line has been steadily growing, and the expansion of 20kV-class facilities is expected in the future.

However, the hot line work of the 20 kV class distribution line is limited to a construction method using a robot arm called a manipulator according to the occupational safety and health regulations of the Ministry of Health, Labor and Welfare. The manipulator method has contributed to avoiding power outages for customers and supporting the site in harsh working environments, but due to the following limitations, it cannot be expected to expand its application range.
(1). Since a roadway (one lane) is required for the parking space, construction may be difficult depending on road conditions.
(2). Since the work range is limited by the pillars, the work content is limited.
(3). Human resource development (education) is difficult because it has special functions in operation.

  Therefore, the inventor of the present invention can perform the indirect hot line work by the uninterruptible work method regardless of the manipulator method by improving the indirect hot line tool used for the indirect hot line work of the 6 kV class overhead distribution line. This is an indirect hot wire tool for 20kV class overhead distribution lines.

  FIG. 1 (a) shows a YATCO 1 that is currently used for indirect hot-wire work of 6kV class overhead distribution lines. In this YATCO 1, the front end of the insulation operating rod 2 and its lower end are shown. The insulation distance L1 to the limit fence on the side is 60 cm. This insulation distance of 60 cm can conform to the occupational safety and health regulations that are considered safe if the worker works directly below the overhead power line and works at a position 60 cm below the work site. The approach limit distance.

  In FIG. 1A, reference numerals 3 and 4 denote a fixed gripping piece and a movable gripping piece that are assembled to the tip of the insulating operation rod 2 via a mounting member 5 so that gripping is possible, and 6 denotes a base of the movable gripping piece 4. An insulating operating rod connected to the end portion via a connecting pin 7, 8 is an operating lever connected to the lower end portion of the operating rod 7 via a connecting pin 9, and this operating lever 8 is provided with a mounting member 10. And is attached to the lower end portion of the insulating operating rod 6. Rubber insulating rods 20a and 20b are attached to the insulating operation rod 2 at a required interval, and the insulating rod 20a on the lower end side is a limit insulating rod. The insulating rod 6 is also provided with an insulating rod 21.

  Therefore, the inventor of the present invention examined the insulation distance from the tip of the insulation operation rod to the limit rod on the lower end side in the tool for indirect hot wire work of 20 kV class overhead distribution wires, and performed the work directly under the wire. As a premise, a length of at least 110 cm that can prevent entry into a standard safety distance of 80 cm is set even if 30 cm of wire rise due to hot wire distribution (hot puller) work is taken into account. In addition, the hot line distribution work is a work to provide a bypass in the middle of the overhead power line and to distribute power by cutting the power in the middle to cut the power line. When the power outage point is first drawn from both sides by the hot puller electric wire support, the electric wire rises when the drawn and bent electric wire portion is pushed upward.

  Means for solving the above-described problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 is directed to an indirect activity such as a yatco used for indirect hot line work of 20 kV class overhead distribution lines. The wire tool is characterized in that an insulation distance L11 from the distal end portion of the insulating operation rod 2 to the limit rod 20a on the lower end side is at least 110 cm.

  The effect of the invention by the above solution will be described with reference numerals of the embodiments described later. According to the invention according to claim 1, the approach limit distance of the hot line work for the 20 kV class overhead distribution line 12 is the Ministry of Health, Labor and Welfare. The standard safety distance is set to 80cm from this 20cm, and the standard safety distance of 80cm is set to 80cm. By taking into account the rising distance of 30 cm, the insulation distance L11 from the front end of the insulating operation rod 2 to the limit rod 20a on the lower end side is set to at least 110 cm. be able to.

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 (b) shows a Yatco (indirect hot wire tool) 11 used for indirect hot wire work of a 20 kV class overhead distribution wire according to the present invention. Indicates. The Yatco 11 is structurally the same as the Yatco 1 shown in FIG. 2A, and is attached to the upper end of an insulating operation rod 2 made of synthetic resin via a mounting member 5 and The movable gripping piece 4 is assembled so as to be grippable, and a synthetic resin insulating operating rod 6 is connected to the base end portion of the movable gripping piece 4 via a connecting pin 7, and connected to the lower end portion of the insulating operating rod 6. An operating lever 8 is connected via a pin 9, and this operating lever 8 is attached to the lower end portion of the insulating operating rod 6 via an attachment member 10. By gripping the operating lever 8, the movable gripping piece 4 is attached. Is closed with respect to the fixed gripping piece 3. Insulating rods 20a, 20b, 20c made of rubber are attached to the insulating operation rod 2 at a required interval, and the insulating rod 20a on the lower end side is a limit insulating rod. Insulating rods 21 a and 21 b are attached to the insulating operating rod 6.

  The feature of this Yatco 11 is that the insulating distance L11 from the front end of the insulating operating rod 2, that is, the limit member 20a provided on the lower end side of the insulating operating rod 2 from the mounting member 5, is at least 110 cm. That is, in setting the optimum length of the YATCO 11 corresponding to the 20 kV class overhead distribution line, as can be seen from FIG. The standard safety distance is set to 80 cm from this 20 cm, and the standard safe distance is set to 80 cm, and the standard safety distance is 80 cm. By taking into account the rising distance of 30 cm, the insulation distance L11 is set to 110 cm.

  In addition, 30 cm of the rising distance of the electric wire 12 due to the hot puller construction is that the portion of the electric wire 12 that has been pulled and bent when the power outage point of the electric wire 12 is pulled by the hot puller electric wire supporter is raised by 30 cm at the maximum. Is. In FIG. 2, a state in which the electric wire 12 is raised during the hot puller construction is indicated by a virtual line.

  FIG. 2 shows a state in which the worker M who is riding in the bucket B of the aerial work vehicle is performing indirect hot-wire construction of the 20 kV class overhead distribution line 12 using the YATCO 11. Since the insulation distance L11 from the mounting member 5 to the limit rod 20a on the lower end side of the insulating operation rod 2 is 110 cm, the hot-wire operation can be performed safely. The insulation distance L11 of the Yatco 11 can be set to 110 cm or more. However, if the insulation distance L11 is made too long, the work becomes difficult. Therefore, the insulation distance L11 is preferably about 110 cm.

  In the above-described embodiment, only the Yatsuko is exemplified as the indirect hot-line tool, but a stick may be used in addition to the Yatsuko.

(a) is a front view of a yatco according to the present invention, and (b) is a front view of a conventional yatco. It is explanatory drawing which shows the state which is performing the indirect hot wire construction of a 20kV class overhead distribution line using the Yatco which concerns on this invention.

Explanation of symbols

L11 Yatco L1 according to the present invention Conventional Yatco 2 Insulating operation rod 6 Insulating operation rod

Claims (1)

  An indirect hot wire tool such as Yatco used for indirect hot wire work of 20 kV class overhead distribution lines, characterized in that the insulation distance from the tip of the insulation operating rod to the limit rod on the lower end side is at least 110 cm. Indirect hot wire tool.

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