JP4763155B2 - gauge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gauge for measuring a series gap length and an insulation distance of a lightning arrester attached to an insulator device.
[Prior art]
[0002]
FIG. 2 shows a state in which the series gap length L0 of the lightning arrester b attached to the tension insulator b is measured using the conventional gauge b.
[0003]
Prior to the description of the gauge b, the tension insulator device A to which the lightning arrester B is attached will be described . In the tension insulator device A, one end side (the left side in FIG. 2) of the insulator string 10 is attached to an arm A of a transmission line tower (hereinafter referred to as “steel tower”) via a mounting bracket 11 and the others. A power transmission line (not shown) is attached to the end side via a mounting bracket 12.
[0004]
Lightning arrester device B are mounted in parallel form and its insulator communication 10 to the mounting bracket 11, 12 are kicked set on both sides of the insulator communicating 10. In other words, avoid lightning device B, the body 13 is attached a low duty-type lightning arrester device to one of the mounting bracket 11, the arc horn 14 and the other provided at the distal end of the main body 13 of that lightning protection device mounting member 12 A series gap length L0 is formed between the arc horn 15 and the arc horn 15.
[0005]
Series gap length L0 is referenced to the predetermined length, it is set to be from the reference within a predetermined range. For example, when the predetermined length is 320 mm, the predetermined range is set to 0 mm to −10 mm. When the series gap length L0 is in the above range, when a lightning strike occurs on the transmission line, the high-voltage current caused by the lightning returns to the voltage of the transmission line by passing through the main body 13 of the lightning arrester, and the current is interrupted. it can. Thereby, the operation of the circuit breaker in the substation is prevented, the occurrence of a temporary power failure is suppressed, and the influence on the OA equipment and the like can be reduced.
[0006]
The gauge b has a long first measuring part b1 for measuring the above-described series gap length L0, and a bolt nut (indicated by a black circle in FIG. 2 is fixed by a bolt nut) in the middle of the first measuring part b1. And a long second measuring portion b2 connected to be freely rotatable. The first measuring part b1 measures the series gap length L0 and has a length of L10 . The second measuring section b2 is a distance between the arc horn 14 of the lightning arrester main body 13 and the side of the insulator 13 where the main body 13 is provided (the distance between the arc guides 13a and 13b of the lightning arrester b). is intended to measure the distance) L20 which is determined by the insulating distance L20, it has a length of L20 '. Incidentally, insulation distance L20 is set to a predetermined distance or more in order to ensure the functions of the lightning arrester b.
[0007]
To measure the series gap length L0 using the up Kige over di b, the second rests on the worker M is insulator string 10 having an end portion of the measuring portion b2, the first measurement unit b1 both arcing horn 14 , Inserted between 15.
[0008]
FIG. 3 is an enlarged view of the portion A in FIG. 2 between both ends of the first measuring section b1 and both arc horns 14, 15 when both ends of the first measuring section b1 are inserted between both arc horns 14, 15. As shown in FIG. 2, when no gap is generated, it is determined that the distance between the arc horns 14 and 15 is within a predetermined series gap length L0. In this measurement, if there is a gap between one or both of the arc horns 14 and 15 and the first measurement part b1, the distance between the arc horns 14 and 15 is determined from the predetermined series gap length L0. It is determined that the length is long, and the gap adjustment is performed so that the series gap length L0 is within a predetermined range .
[0009]
When the first measurement unit b1 inserted between both arcing horn 14 is stopped at the position of that hit the tip of the arcing horn to the chamfered portion C provided at the end, both arcing horn 14, The distance between 15 is determined to be within a predetermined range of a predetermined series gap length L0. When the chamfered portion C passes over the center portion of the first measuring portion b1 and stops, the distance between the arc horns 14 and 15 is within a predetermined range of a predetermined series gap length L0. It is determined that the gap is not within the range, and the gap adjustment is performed so as to be within a predetermined range .
[0010]
The measurement using the second measuring part b2 of the gauge b is performed by placing the second measuring part b2 between the root of the arc horn 14 of the lightning arrester body 13 and the end of the insulator 10 on the side of the mounting bracket 11 (L20). Position it and do it. Usually, the distance L20 between the root of the arc horn 14 and the end of the insulator string 10 is not less than a predetermined distance (L20 '), so the measurement using the second measuring part b2 is a kind of confirmation work. It becomes.
[0011]
[Problems to be solved by the invention]
However, since the conventional gauge is inserted between the two arc horns, the end of the first measuring unit is difficult to be aligned with the tip of the arc horn, which makes it difficult to measure. In addition, since the worker is mounted on the insulator during measurement, the deflection of the insulator chain changes, thereby changing the distance between the arc horns, which is different from the actual series gap length.
[0012]
Therefore, the present invention has been made to solve the above-described drawbacks, and the purpose of the present invention is to easily lock the measuring unit to the tip of the arc horn, and to connect the lightning arrester in series without being mounted on the insulator chain. The object is to provide a gauge capable of measuring the gap length .
[0013]
[Means for Solving the Problems]
This onset Ming, in order to achieve the above object, the gauge having a measuring unit for measuring the series gap length of arrester device attached to the insulator device, a gripping portion whose tip is fixed to the measurement unit, the measuring unit, which has a stepped engaging portion applied to the distal end portion of one of the arcing horn of the lightning arrester device at one end, stage of fitting the tip of the other arcing horn of the lightning arrester device to the other end has a section, the distance between the between the locking portion stepped portion together when equal to the lower limit of the allowable range of the predetermined series gap length (L2), the depth in the direction away from the locking portion of the step portion The length dimension is made equal to the difference (L1−L2) between the upper limit (L1) and the lower limit (L2) of the allowable range of the predetermined series gap length.
The gauge according to the present invention is characterized in that the measuring section has a length that can measure the insulation distance of the lightning arrester.
Furthermore, the gauge according to the present invention is used for measuring the series gap length of a lightning arrester attached to a tension insulator installed sideways, and the gripping unit is connected in series by the operator from the arm of the transmission line tower. It is characterized by having a length that can be applied to the gap.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1A shows a state in which the gap length L0 of the lightning arrester B attached to the tension insulator device A is measured using the gauge a according to the embodiment, and FIG. It is an enlarged view of a gauge a part.
[0015]
Since the tension insulator device A and the lightning arrester device B are the same as those in FIG. 2 described above, the same components are denoted by the same reference numerals and description thereof is omitted.
[0016]
The gauge a has a long measuring portion a1 for measuring the series gap length L0, and a bolt nut in the middle of the measuring portion a1 (a black circle in FIG. 1 indicates a state fixed by the bolt nut. ), And a length L ′ of the gripping portion a2 is measured by an operator M mounted on a mounting bracket 11 on the tower side (not shown). The portion a1 is set so as to be fitted to the series gap length L0. The measuring portion a1 of the gauge a, as shown in FIG. 1 (b), one end portion is formed in the locking portion 1 applied to the distal end of one of the arc horn 15, the other end portion with a series gap length L0 It is formed in the step part 2 which measures. Upper portion of the step portion 2, a predetermined equal from the locking portion 1 to a predetermined series gap length L0 and having a length L1, the bottom of the step portion 2 has a length equal to the lower limit of the predetermined series gap length L0 and it has a L2. In FIG. 1 (b), its lower limit is shown an example of a 10mm length shorter than the series gap length L0.
[0017]
The arc horn 14 of the lightning arrester main body 13 and the main body 13 are provided from the longer tip of the locking portion 1 of the measuring portion a1 to the tip of the upper portion of the step portion 2 (the total length of the measuring portion a1). The distance L20 ′ (that is, L20 ≧ L20 ′) that can measure the distance (insulation distance of the lightning arrester b) L20 from the mounting side of the insulator side 10 on the side where the wire is connected is set . The insulation distance L20 is set to be a predetermined distance or more in order to ensure the function of the lightning arrester b.
[0018]
In order to measure the series gap length L0 using the gauge a having the above-described configuration, an operator M having an end of the gripping portion a2 moves the locking portion 1 of the measuring portion a1 to one arc horn from the arm A of the steel tower. placed at the tip of 14, then, it performs fitted a stepped portion 2 on the other arcing horn 15.
[0019]
When the upper part of the step part 2 of the measuring part a1 of the gauge a is inserted without a gap between the arc horns 14 and 15, the distance between the arc horns 14 and 15 is set to a predetermined series gap length L0. It is determined that there is. If, if occurs a gap between the engaging portion 1 and the stepped portion 2 of the measuring portion a1 which is inserted between the two arcing horn 14 in the measurement between the two arcing horns 14 and 15, both arcing horn 14 It is determined that the distance between them is longer than a predetermined series gap length L0, and the gap is adjusted.
[0020]
When the tip of the other arc horn 14 is stopped at the step 2 (see the state of FIG. 1 (b)), the distance between the arc horns 14 and 15 is within a predetermined range of a predetermined series gap length L0. Is determined to be within. Then, when the distal end of the other arc horn 14 is stopped at the central side of the measuring portion a1 beyond the position of the step portion 2, the distance between the two arcing horns 14 and 15, given a predetermined series gap length L0 It is determined that it is not within the range, and the gap adjustment is performed .
[0021]
The measurement using the longest length (L20 ') of the measuring part a1 of the gauge a is performed between the root of the arc horn 14 of the lightning arrester main body 13 and the end of the insulator 10 on the side of the mounting bracket 11 (L20). The measurement unit a1 is positioned at Usually, the distance L20 between the root of the arc horn 14 and the end of the insulator series 10 is equal to or greater than a predetermined distance (L20 '), so the measurement using the measuring part a1 is a kind of confirmation work. Become.
[0022]
As described above, the gauge a according to the present invention can be measured by hooking the locking portion 1 on the tip of one arc horn 15 and fitting the stepped portion 2 to the other arc horn 14, so that the series gap length L0 is measured. Can be easily measured. Further, since measurement can be performed without the worker M being placed on the insulator series 10, the operator M does not cause deflection in the insulator series 10, and therefore the actual series gap length L0 can be measured. Furthermore, the insulation distance L20 of the main body 13 of the lightning arrester can be easily measured.
[0023]
In the above-described example, the lightning arrester is provided in the tension insulator, but may be provided in another insulator such as a suspension insulator or a support insulator.
[0024]
【The invention's effect】
The gauge according to the present invention has a stepped locking portion that hangs the tip of one arc horn of the lightning arrester on one end side, and fits the tip of the other arc horn of the lightning arrester on the other end. A measuring unit having a stepped portion formed with a length of an allowable range of a predetermined series gap length, and a measuring unit that is fixed to the measuring unit by a tip, and is not mounted on a insulator by an operator from an arm of a steel tower. Therefore, the series gap length can be measured accurately and easily.
Moreover, when the measuring part is formed to a length that can measure the insulation distance of the lightning arrester, the insulation distance of the lightning arrester can be easily measured.
[Brief description of the drawings]
FIG. 1A is a view showing a state in which a series gap length is measured using a gauge according to the present invention, and FIG. 1B is an enlarged view of a gauge portion.
FIG. 2 is a diagram showing a state in which a series gap length is measured using a conventional gauge.
FIG. 3 is an enlarged view of part A in FIG. 2;
[Explanation of symbols]
a Gauge a1 Measuring part a2 Holding part 1 Locking part 2 Step part A Tensile insulator (insulator)
B Lightning arrester 13 Lightning arrester body 14, 15 Arc horn M Worker A Arm

Claims (3)

A gauge having a measuring part for measuring a series gap length of a lightning arrester attached to the insulator device, and a grip part having a tip fixed to the measuring part ,
The measuring unit, which has a stepped engaging portion applied to the distal end portion of one of the arcing horn of the lightning arrester device at one end, fitted to the tip portion of the other of the arc horn of the lightning arrester device to the other end Have a step ,
The distance between the locking portion and the stepped portion is made equal to the lower limit (L2) of the allowable range of the predetermined series gap length, and the depth dimension of the stepped portion in the direction away from the locking portion is set to the predetermined range. A gauge characterized by being equal to the difference (L1-L2) between the upper limit (L1) of the allowable range of the series gap length and the lower limit (L2) . The gauge according to claim 1, wherein the measuring section has a length capable of measuring an insulation distance of the lightning arrester. It is used to measure the series gap length of a lightning arrester attached to a tension insulator installed sideways. Have
  The gauge according to claim 1 or 2, wherein

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