JP2007292508A - Tool for x-ray photographing of overhead power transmission line - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool for moving a photographing device to a photographing portion on an overhead power transmission line to be attached, when inspecting the overhead power transmission line by X-ray photographing. <P>SOLUTION: This tool for X-ray-photographing the overhead power transmission line is a tool with a rectangular scalene triangular prism shape as the whole, and has skeleton structure having beams corresponding to respective sides of two triangles, beams for coupling three sets of opposed apex parts, and an auxiliary beam, The two beams serving as short sides with a right angle therebetween are located in an upper side when the tool is used, a member for moving the tool on the overhead power transmission line, a member for fixing it onto the overhead power transmission line, and a film attaching part, are attached in an under position, lower parts of the two beams serving as long sides with the right angle therebetween are formed into structure for attaching an X-ray generator, the two beams serving as oblique sides comprises respectively upper part side beams and lower part side beams, the upper part side beams are attached rotatably to the lower part side beams in a lower part to be attached detachably to the two beams serving as the short sides in an upper part, and the lower part side beams are fixedly supported to the two beams serving as the long sides with the right angle therebetween in the upper part side, via the respective auxiliary beams. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an X-ray imaging jig for an overhead power transmission line, and more particularly to a jig for fixing an X-ray generator and a film to an electric wire in order to inspect the state of internal corrosion of the overhead power transmission line.

  Since overhead power transmission lines are installed between steel towers several tens to several hundreds of meters away, they are usually twisted with zinc (Zn) -plated steel wire at the center or aluminum-covered steel wire with an aluminum layer fixed on the surface. , And a structure (steel core aluminum stranded wire, ACSR) in which a plurality of thin aluminum wires having good conductivity and low density are wound around the outer periphery to provide an outer peripheral wire portion. As a result, the core wire portion mainly bears an external force and its own weight, and the outer peripheral wire portion on the outer periphery thereof bears the electrical conductivity.

In many cases, a plurality of layers of aluminum wires are wound around the outer peripheral line portion.
Once installed, overhead power transmission lines will continue to be exposed to severe sunshine and wind and rain for many years. In particular, there is salt damage near the coastline, and it is easily exposed to industrial waste gas containing sulfur and nitric oxide in the factory area, and in recent years it is also exposed to acid rain. As a result, the overhead power transmission line is easily corroded. In particular, among the core wire portion and the outer peripheral wire portion wound around a plurality of layers, a substance that promotes corrosion tends to stay in the inner peripheral wire portion, and corrosion is likely to occur. In the case of ACSR, aluminum not only has a relatively high chemical activity, but also is easily corroded because it is in contact with different metals such as steel wires or Zn-plated steel wires (Patent Documents 1 and 2). Non-Patent Document 1).

Furthermore, if the progress of corrosion is left unattended, accidents such as fire due to heat generation due to an increase in electrical resistance, disconnection due to a strong wind or a load based on its own weight may occur. For this reason, it is not necessary to cut a test sample from an overhead power transmission line. Furthermore, X-ray imaging is used as an inspection means that is more accurate than the measurement of changes in the outer diameter, overflow flaw detection, etc., and can detect even small abnormalities. Further, an invention has been made to further perform cluster processing on the image (Patent Document 3).
JP 2003-79018 A JP 2000-275165 A Japanese Patent Application No. 2005-210840, drawing Special Committee on Investigation of Deterioration (Corrosion) Phenomena of Overhead Power Transmission Lines “Electric Corrosion Phenomena of Overhead Transmission Lines” Technical Report of the Institute of Electrical Engineers of Japan, The Institute of Electrical Engineers of Japan, June, 968 (B section) 54-65

In order to inspect the overhead power transmission line installed on the steel tower with X-rays, an X-ray generator, an X-ray film (including an IP plate), and a jig for attaching them to the overhead power transmission line (hereinafter referred to as “ (Also referred to as “mounting jig”) to the place where the overhead power transmission line is installed, move it to the overhead power transmission line using a steel tower, and then inspect the overhead power transmission line. It is necessary to move the overhead power transmission line to a location and then fix the X-ray generator and the X-ray film at that location while maintaining a predetermined positional relationship with the overhead power transmission line.
However, overhead power transmission lines are inherently very unstable because they hang in the air between towers, and are often in remote areas such as mountains. The vibration is short but the amplitude is small.
In addition, there are not a few cases where they are exposed to wind and rain during work.

For this reason, mounting of X-ray generators and X-ray films as well as jigs for mounting them on the overhead power transmission line and X-ray imaging are highly dangerous, unlike mere work at high places. High degree of skill is required.
In addition, in order to obtain a clear image by X-ray photography that cannot use a lens, the film is fixed closely to the overhead power transmission line, and the X-ray generator can adjust the distance within a certain range from the overhead power transmission line. However, since the overhead power transmission line is swaying and working at a high place, the mounting jig must be easy to work from both the hardware and soft sides and fall accidents. Sufficient consideration and attention are required to prevent this.
Further, since the overhead power transmission line is often shaken, it is preferable that the photographing apparatus, particularly the mounting jig, has a vibration absorbing property.

In addition, since exposure to X-rays has a great adverse effect on the human body, the mounting jig for the X-ray imaging apparatus is designed to completely and reliably prevent exposure of persons engaged in imaging from both hardware and software. There is a need.
In addition, the overhead power transmission lines to be inspected are often in inconvenient places such as mountainous areas, and in many cases, they must be done manually, especially at the final stage. . In addition, the installation of photography equipment on overhead power transmission lines installed at high altitudes is a heavy labor. For this reason, the apparatus required for X-ray imaging, especially the heaviest mounting jig, needs to be as light as possible.

  For this reason, when inspecting the state of damage to overhead power transmission lines using X-ray imaging and image processing, X-ray generators and films are fixed more securely and securely on overhead power transmission lines that are shaken in the air. In addition to making it possible to mount and shoot further, it is easier to work and handle in high places, and it is hoped to develop a mounting jig that is superior in strength and vibration resistance and lightweight. It was rare.

The present invention has been made for the purpose of solving the above-described problems. The mounting jig is formed into an unequal-sided right triangular prism as a whole, and three sets of beams corresponding to each side of two unequal-sided right-angled triangles. A frame structure having beams or the like that connect opposite vertices to each other, and an X-ray generator can be attached to the lower part of the long side across the right angle and to the inside of the jig by adjusting the height position thereof, At the position below the short side, a gripping clamp to fix the entire jig on the overhead power transmission line is attached and a release mechanism for passing the overhead power transmission line inside is provided on the oblique side. .
In addition, various ideas have been devised in order to ensure further safety and to obtain good handling properties. The invention of each claim will be described below.

The invention described in claim 1
It is a jig with a triangular prism shape with unequal sides as a whole,
A skeleton structure having a beam corresponding to each side of two unequal right-angled triangles, three pairs of opposite vertices or beams near each other, and a plurality of auxiliary beams further connecting the beams. Yes,
Two beams with short sides sandwiching a right angle are positioned above when using the jig, and two auxiliary beams are attached to these two beams or in parallel between these two beams. If there are two beams or these two auxiliary beams, the moving part for moving the jig on the overhead power transmission line below each of the two beams and the overhead power transmission line A fixing part for fixing the jig is attached,
In the beam of the portion that connects the apexes at right angles to each other, a film mounting portion is positioned below the short-angled portion that sandwiches the right angle at a position that is a predetermined height with respect to the overhead power transmission line fixed by the fixing portion. Is mounted parallel to the side,
The lower part of the two beams that are the long sides sandwiching the right angle has a structure that allows the X-ray generator to be attached at a predetermined distance from the film mounting part,
The two beams serving as the oblique sides are each composed of an upper side beam and a lower side beam, and the upper side beam is rotatably attached to the lower side beam at the lower part thereof, and the upper part thereof is composed of two beams each serving as the short side. The lower side beam is fixedly supported by two beams having long sides sandwiching the right angle on the upper side via auxiliary beams, respectively. This is a jig for X-ray imaging of electric wires.

In the invention of this claim, the jig is an unequal-angled right triangular prism as a whole, and the main part is a frame structure composed of beams, so the jig is light.
It is preferable that the beam, in particular, the main beam is made of metal.
Further, since the overhead power transmission line is moved into the unequal right-angled triangular prism and moved on the overhead power transmission line and fixed to the overhead power transmission line, there is no fear of dropping and it is safe.
In addition, the unequal-sided right triangular prism shape has a certain distance between the film and the X-ray generator in order to obtain a clear image because X-ray photography cannot use a lens. Depending on the length required. For this reason, in X-ray photography, the entire jig not only serves as a camera frame, but also ensures an appropriate exposure amount and focal length from the viewpoint of image analysis, and serves exactly as a diaphragm. It will be.
In this case, since the heavy X-ray generator is attached below the jig, the stability of the entire apparatus is sufficient.

The “overhead transmission line” in the present invention means an overhead distribution line having a voltage of less than 20,000 volts, an overhead transmission line having a voltage of 20,000 volts or more, a ground line, and connecting parts thereof such as a straight sleeve, a retention clamp, and a jumper sleeve. Therefore, even in the case of a jig used for inspecting ground wires or connecting parts, for example, it is included in the scope of the right of the present invention.
In addition, “a portion where three sets of opposite vertices or their vicinity are mutually connected” indicates a portion which is orthogonal to each side of the triangle and is horizontally installed at the time of photographing.
Further, “the vicinity thereof” is preferably within 15 cm, more preferably within 10 cm, although it depends on the adjustment of the dimensions of the jig and the arrangement with other components.
The “auxiliary beam for further coupling each beam” is, for example, a beam that couples the upper side of the lower side beam and a long side sandwiching a right angle, and may have several other beams. .
The “beam” refers to a bar, a U-shaped material, an L-shaped material, an I-shaped material, or the like.
The “framework structure” means that the main strength member is not a plate material but a beam, unlike a car body or the like.

  Here, “Two beams with short sides sandwiching a right angle are positioned above when using the jig”, but this is during normal use, such as directly below the core of the overhead power transmission line. Hold the jig of the present invention tilted 90 degrees using other overhead power lines installed between the same steel towers and special jig fixing tools in order to inspect the damage state of the aluminum wire directly above However, X-ray imaging of the overhead power transmission line in this state is not excluded (this case is also included in the scope of the right of the present invention).

The invention according to claim 2 is a jig for X-ray imaging of the overhead power transmission line,
An X-ray of an overhead power transmission line, wherein the beam corresponding to each side of the two unequal right-angled triangles and the three pairs of opposite vertices or their vicinity are metal pipes This is a photographing jig.

In the invention of this claim, since the beam is a metal pipe, it is lightweight and can be easily obtained and processed.
The tube preferably has a circular cross section. This is because the strength per weight is high and it is easy to hold by hand when transporting or manipulating manually.

The invention according to claim 3 is an X-ray imaging jig of the overhead power transmission line,
The two beams which are short sides sandwiching the right angle and the beams located at the same height as these two beams are all connected by welding,
The X-ray imaging jig for an overhead power transmission line is characterized in that the connection between the two beams having short sides sandwiching the right angle and the two beams having long sides sandwiching the right angle is bolt fastening. is there.

In the invention of this claim, the short side portion at the top of the inequality triangular prism-shaped jig as a whole becomes strong because the connection between the beams is welded, and the lower part at both ends of the short side Since the connection to the beam is bolted and tacked, transmission of undesired shaking of the overhead power transmission line to the beam below is prevented.
Here, “a beam located at the same height as these two beams” means an invariant triangular prism-like treatment such as a beam connecting perpendicular vertices and a beam connecting non-right vertices of short sides. A beam that overlaps the short side when the tool is viewed from the direction facing the triangle in use.
The effect of damping the vibration when there is play due to bolting or tacking is a well-known technique, as the former is used for the connection of building rebars and the latter is used for vehicle couplers.
Furthermore, since it is bolted or tacked, it can be easily disassembled, opened, and reassembled when transported between mountains.

The invention according to claim 4 is an X-ray imaging jig of the overhead power transmission line,
The bolt tightening that couples the two beams with the short sides sandwiching the right angle and the two beams with the long sides sandwiching the right angle is detachable and has a bolt detent. It is a characteristic X-ray imaging jig for an overhead power transmission line.

In the invention of this claim, safety is improved because the bolt has a detent.
In addition, “bolt detent” can be performed by a method that can be easily enforced at the inspection place in the mountains, such as passing a detent wire through the bolt and nut, fitting a washer, or using double bolts. Any means is acceptable.

The invention according to claim 5 is an X-ray imaging jig of the overhead power transmission line,
X-ray imaging of an overhead power transmission line characterized in that the two beams having long sides sandwiching the right angle and the beams other than the two beams having short sides sandwiching the right angle are joined by welding. Jig.

  In the invention of this claim, the heavy X-ray imaging apparatus and the long beam for fixing the battery are strengthened and the fixing is stable.

The invention according to claim 6 is an X-ray imaging jig for the overhead power transmission line,
The lower side beam is fixedly supported via two beams having long sides sandwiching the right angle on the upper side and auxiliary beams, respectively, at the position to be fixedly supported and at a position below the position. The X-ray imaging jig for the overhead power transmission line is characterized in that the connection with the other beam is made by welding.

  In the invention of this claim, the heavy X-ray imaging apparatus and the location where the battery is fixed are strengthened and the fixing is stable.

The invention according to claim 7 is an X-ray imaging jig of the overhead power transmission line,
It has two auxiliary beams mounted in parallel between two beams that are short sides across a right angle, and the moving part and the fixing part are both on the two auxiliary beams. An X-ray imaging jig for an overhead power transmission line, wherein the jig is attached with a bolt.

In the invention of this claim, since it is attached with bolts, it is possible to reduce the weight by replacing it from the main body of the framework structure when replacing it with the overhead power transmission line to be inspected, and transporting it manually. It becomes possible.
Moreover, the upper part of the jig is further strengthened by the two beams attached in parallel between the two beams having short sides sandwiching the right angle.

The invention according to claim 8 is an X-ray imaging jig of the overhead power transmission line,
In the state where the moving part has a roller in which a concave portion for fitting the overhead power transmission line is formed in the central part, and the X-ray generator is attached to the lower part of the jig and the roller is put on the overhead power transmission line, An X-ray imaging jig for an overhead power transmission line, wherein the roller is attached so as to face in a vertical direction.

In the invention of this claim, since there is a roller, not only is the conveyance easy, but the roller is in the vertical direction in the conveyance state, so that it is easy to roll the roller.
Moreover, since the recessed part which fits an overhead power transmission line is formed in the roller (including the cylindrical shape which has a collar at both ends), it becomes difficult to derail from the overhead power transmission line which shakes.

The invention according to claim 9 is an X-ray imaging jig of the overhead power transmission line,
The moving part has a derailment prevention string, and the derailment prevention string is in a state where the roller is placed on the overhead power transmission line, the central part is located below the overhead power transmission line, and both end parts are An X-ray imaging jig for an overhead power transmission line, wherein the jig is attached so that the derailment prevention string is positioned near both ends of a member that supports the roller and on the opposite side of the roller.

In the invention of this claim, since the derailment prevention string is provided, it becomes more difficult to derail.
The “attachment” includes locking by a hook mechanism and the like, and is not limited to tying.
The material of the “string” is not limited.

The invention according to claim 10 is an X-ray imaging jig of the overhead power transmission line,
The portion of the fixing portion that grips the overhead power transmission line and the concave portion below the roller of the moving portion are at the same height in the vertical direction from the two beams that are short sides across the right angle. An X-ray imaging jig for an overhead power transmission line, which is characterized in that

  In the invention of this claim, the height in the vertical direction (the distance in the long side direction) is the same (however, the distance in the long side direction) from the beam having the short sides sandwiching the right angle, and from the overhead power transmission line, in the state of use. (Including the case where there is an error), it is convenient to change and replace the roller and clamp on the overhead power transmission line.

The invention according to claim 11 is an X-ray imaging jig of the overhead power transmission line,
X-ray photography of an overhead power transmission line, wherein the moving part has a horizontal ring welded to the outside of the jig at two right-angled vertices of the unequal right-angled triangle Jig.

In the invention of this claim, since the ring is provided, the jig can be easily pulled by the rope on the overhead power transmission line. At this time, since the jig is located at a right apex (including within 5 cm in the vicinity thereof), and further above the heavy X-ray generator, the jig does not tilt and is stable during towing.
In addition, since the ring is horizontal and outside the jig, the end of the tied rope for traction also hangs down outside the jig, so that the rope does not interfere with the overhead power transmission line. In addition, it is easy to attach to the beam, which is the short side of the ring jig, and does not protrude upward from the beam. It does not become an obstacle.

The invention according to claim 12 is an X-ray imaging jig of the overhead power transmission line,
The planar shape is a Kanji shape,
It has a side wall in the direction perpendicular to the ceiling frame, the bottom frame, and the overhead power transmission line,
The ceiling frame is horizontally held by two beams that are short sides sandwiching the right angle, or by these two beams and a beam suspended from an auxiliary beam located at the same height as these two beams,
The bottom frame is formed with a notch for the overhead power transmission line located in the center, and bolts are screwed from below into the four corners,
The film can be loaded and unloaded from the side parallel to the overhead power transmission line.
In a state in which the jig is fixed to the overhead power transmission line by the fixing portion, it has a film mounting portion that can be adjusted so that the lower surface of the mounted film is in contact with the upper end of the overhead power transmission line. It is a characteristic X-ray imaging jig for an overhead power transmission line.

In the invention of this claim, since the film (including the IP plate) is sandwiched between the upper and lower frames, the film can be easily mounted and the fixing is stable. At this time, it is possible to fix not only the film but also the resin plate and the number plates on the upper and lower sides thereof by adjusting the bolts below. Furthermore, it becomes easy to place the film in close contact with the upper part of the overhead power transmission line, and the image becomes clear.
Note that “a beam positioned at the same height as a beam having a short side sandwiching a right angle” refers to a beam or the like that connects perpendicular vertices and includes a beam having a short side that sandwiches a right angle.
Further, the film mounting portion is preferably supported at four corners by beams (including rods) suspended from the upper beam, but may be supported at two locations for convenience of weight or the like.
Moreover, since the planar shape is a square shape, there is little reflection at the time of X-ray photography, and an operator who is below (on the ground) is not exposed by X-rays by reflection.

The invention according to claim 13 is an X-ray imaging jig for the overhead power transmission line,
Two vertically long and narrow vertical plates each having a hole formed in a vertical direction at a predetermined interval at a predetermined distance from the lower part of the two beams having long sides sandwiching the right angle and the film mounting portion, X-ray of an overhead power transmission line, characterized in that it has an X-ray generator mounting portion having a structure in which the surface in which the hole is formed faces the inner side of the jig and is attached by welding This is a photographing jig.

In the invention of this claim, the X-ray generator is mounted using holes formed in the standing plate fixed to the long side beam by welding, but the standing plate has a number of holes of 50 mm in the vertical direction. Therefore, the distance between the X-ray generator and the film can be adjusted according to the situation.
Moreover, since it becomes easy to remove an X-ray generator from a jig | tool, or to attach in reverse, conveyance by the human power in a mountain etc. becomes convenient.

The invention according to claim 14 is an X-ray imaging jig for the overhead power transmission line,
The X-ray generator includes two upper and lower horizontal plates fixed at both ends to the two upper and lower elongated plates by bolts, and a vertical plate fixed at the center of the two upper and lower horizontal plates. It is the jig | tool for radiography of an overhead power transmission line characterized by being fixed to the jig | tool using.

  In the present invention, the thick columnar X-ray generator is fixed to the vertical plate using a rubber material or the like in a state where the X-ray generator is set up in the vertical direction, and the vertical plate is fixed to the horizontal plate at two upper and lower positions. Since the two horizontal plates are fixed to the standing plate with bolts at two left and right positions, the X-ray generator is firmly and easily fixed to the jig.

The invention according to claim 15 is an X-ray imaging jig of the overhead power transmission line,
The two lower side beams are reinforced and joined to each other with an auxiliary beam at the upper part, and a rope for preventing the fall of the X-ray generator attached to the jig is fixed to the central part of the auxiliary beam. This is a jig for X-ray imaging of an overhead power transmission line, characterized by being provided with an eaves.

In the invention of this claim, since there is a hook in front of the X-ray generator, the operator notices the hook immediately and hardly forgets to attach the fall prevention rope. For this reason, safety increases.
In addition, since it is only necessary that the rope can be firmly fixed or tied to the rope here, it is not limited to a pure cage, and may be a ring shape, for example.

The invention according to claim 16 is an X-ray imaging jig of the overhead power transmission line,
The fixing part for fixing the jig to the overhead power transmission line is:
A clamp for gripping and fixing the outer periphery of the overhead power transmission line;
The clamp has a collar so that the outer periphery of the overhead power transmission line having an outer diameter smaller than the hole for gripping the outer periphery of the overhead power transmission line of the clamp can be gripped and fixed. This is an X-ray imaging jig for an overhead power transmission line.

  In the invention of this claim, when inspecting an overhead power transmission line whose outer diameter is smaller than the inner diameter of the hole of the electric wire gripping clamp of the fixing part, it must be replaced with a clamp adapted to the outer diameter of the overhead power transmission line each time. As an accessory, it has a collar as an accessory. For this reason, when fixing an X-ray imaging jig to an overhead power transmission line whose outer diameter is slightly smaller than a hole (for gripping) for fitting and fixing the electric wire of the clamp, it is preliminarily placed in the hole of the clamp. The prepared lightweight collar is fitted, and the overhead power transmission line is fitted and fixed through the collar. This eliminates the need to carry multiple types and relatively heavy clamps to the measurement site.

  The collar is a split metal ring, the outer diameter is the same as the hole into which the electric wire of the clamp is fitted, and the inner diameter is the same as the outer diameter of the overhead power transmission line to be inspected. However, if the object to be inspected is the above-described connecting component or the like, the inner shape and dimensions are those that match the outer shapes and dimensions, for example, hexagons having the same dimensions. Since it is further broken into two, the ring cross-section is concave, fixed inside the ring through an overhead power transmission line, and the clamp holds the concave in the center of the concave cross-section of the ring. The both sides of the clamp may be sandwiched so that the ring secures the overhead power transmission line and does not come off the clamp.

In addition, since the clamp is in principle attached to the X-ray imaging jig body by a bolt, when inspecting an overhead power transmission line having a greatly different size, it can be replaced with the clamp for the overhead power transmission line. In addition, when a new inspection place has a large difference in outer diameter from the overhead transmission line inspected at the previous place, and when inspecting multiple types of overhead transmission lines, the X-ray imaging jig should be managed. In place (such as the management center for inspection jigs), replace the clamp with the one with the largest outer diameter of the overhead transmission line to be inspected at the new measurement location, and measure the site with the necessary collar It is possible to change the color only on site.
Therefore, in this case, there are a plurality of types of clamps, and a collar is prepared for each clamp dimension.

In the present invention, since it is a jig with a skeleton structure of unequal sides and right triangular prisms as a whole, it is lightweight and strong, and it is easy to carry and attach a set of X-ray imaging apparatuses to an imaging location on an overhead power transmission line and It becomes safer.
In addition, X-ray imaging of the overhead power transmission line is easy and safe.

For this reason, it is not necessary to cut a test sample from the overhead power transmission line, and it is possible to appropriately inspect the state of damage such as an internal corrosion state of the overhead power transmission line.
In addition, since X-ray imaging is more accurate than measurement of changes in the outer diameter and overflow flaw detection, it is possible to detect even small abnormalities, and such X-ray imaging can be easily aerial using the jig of the present invention. Applicable to transmission lines.

Hereinafter, the present invention will be described based on the best mode. Note that the present invention is not limited to the following embodiments. Various modifications can be made to the following embodiments within the same and equivalent scope as the present invention.
An X-ray imaging jig for an overhead power transmission line according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram conceptually showing a jig on an overhead power transmission line as viewed from the direction (transport direction) in which the overhead power transmission line is installed, and FIG. 2 is a view of FIG. FIG. 3 is a view taken from the arrow BB in FIG. 1 (viewed from below). FIG. 4 is a diagram conceptually showing a film mounting portion.

  In these drawings, 10 is a beam (bone, frame) on the outside of a beam having a short side sandwiching a right angle (hereinafter also referred to as “short side”), 11 is a hooking portion thereof, 13 Is a check rope ring, and 15 is an inner beam of the short side beams. Reference numeral 20 denotes a beam having a long side sandwiching a right angle (hereinafter also referred to as “long side”), and reference numeral 21 denotes a vertical plate for attaching the X-ray generator attached in pairs below the two long side beams. 22 and 23 are upper and lower horizontal plates for attaching the X-ray generator, 24 is a vertical plate for fixing, and 28 is a hanging coupling bolt. Reference numeral 31 denotes a beam on the lower side of the beams having a right-angled oblique side, 32 denotes a beam on the upper side, 33 denotes a rotating portion, and 34 denotes a collar portion.

Reference numeral 40 is a beam connecting the upper sides of two oblique sides, and 41 is a beam connecting (connecting and connecting) right-angled vertex portions of two unequal-sided right triangles (hereinafter also referred to as “triangles” depending on the case). And 42 is an auxiliary beam of the inner beam. 50, 55, 56 and 57 are also auxiliary beams. Reference numeral 59 denotes a rope ring.
Reference numeral 60 is a film mounting portion, 61 and 62 are respectively a ceiling frame and a bottom frame, 63 is a film adjusting bolt, and 64 is a beam (bar material) that hangs down to suspend the film mounting portion from the upper beam. And 65 is a film. 80 is a roller with a collar, 81 is a roller holding portion, 82 is a roller shaft, 83 is a roller mounting bolt, and 84 is a derailment prevention string. 85 is a clamp for holding the overhead power transmission line, 88 is a clamp mounting bolt, and 98 is a rubber material.

  90 is an X-ray generator, 91 is its battery, and 95 is an overhead power transmission line. Since these are not constituent parts of the jig, they are indicated by dotted lines.

Hereinafter, the details of the whole and the structure and function of each part will be described.
As shown in FIGS. 1 to 3, the jig as a whole is an unequal-sided right triangular prism (hereinafter also referred to as “triangle” depending on the case), and each side of the two unequal-sided right-angled triangles is mainly a steel pipe, Specifically, it is composed of a light and inexpensive gas pipe, and in principle, a beam (bone) connecting each vertex of two triangles or the vicinity thereof and a reinforcing beam is a frame structure composed of a steel pipe. In X-ray imaging, the jig is not only a tool for carrying and fixing the X-ray generator and film (including IP plate) to the imaging location on the overhead power transmission line, but also the body or It is also the part that plays the role of a diaphragm mechanism that adjusts the case and exposure amount and focus.

As described above, when transporting or shooting on an overhead power transmission line, the short side part sandwiching the right angle of the unequal-sided right triangular prism-shaped jig as a whole is located above, and the intersection of the long side and the oblique side, the coupling part Is located at the lowermost position, the overhead power transmission line is inside the triangle, and the X-ray generator 90 is fixed below the triangle.
In order to incorporate the overhead power transmission line inside the triangle, as shown in FIG. 1, the two oblique sides are largely divided into a lower beam 31 and an upper beam 32, and the upper beam 32 is in the lower part. It can be rotated around the rotating part 33, and a hook part 34 is provided on the upper part thereof. The hook part 34 is hooked and fixed to the hook part 11 of the beam 10 on the outer side of the short side. It is possible. For safety, a fixing bolt tightening mechanism, a wire, and the like are also provided, but this is not shown because it is a well-known technique.

Further, the two lower beams 31 are fixed to each other by an auxiliary beam 57 for reinforcement at the upper portion thereof, and are also fixed to the long-side beam 20 by an auxiliary beam 50 for reinforcement. .
Further, the two long-side beams 20 are also fixed to each other by the auxiliary beam 55 at substantially the same height, and the lower part of the triangular jig has sufficient strength to fix the X-ray generator. It has a structure.

The two long-side beams 20 have a length of about 1 m, and below them, as shown in FIG. 2, a pair of upright plates 21 for attaching the X-ray generator are attached to the opposite sides by welding. ing. However, in FIG. 2, the long beam is not visible because it is behind the hypotenuses 31 and 32 (not shown). The two standing plates 21 have the same height so that the distance between the X-ray imaging apparatus 90 and the film can be adjusted at a pitch of 50 mm from 250 mm to 500 mm, i.e., can function as a diaphragm. A hole through which the bolt penetrates at equal intervals in the vertical direction is formed.
The upper and lower horizontal plates 22 and 23 are attached by bolts (not shown) using bolt holes, and an X-ray generator is fixed to the center of the two horizontal plates 22 and 23 by a rubber material 98. A vertical plate 24 is fixed.

Next, the beam 10 on the outer side of the short side has a length of about 50 cm, and the beam 20 on the long side is attached to the apex side of the right side by a hanging coupling bolt 28, and also on the opposite end side. A beam 32 on the upper side of the hypotenuse is attached by a collar portion 34, and thereby, an undesired fluctuation from the overhead power transmission line 95 to the X-ray generator 90 located below is absorbed.
In addition, since the X-ray imaging apparatus 90 having a relatively heavy weight of about 5.5 kg is firmly fixed and attached, the beam 20 on the long side of the triangular jig and the beam 31 on the lower side of the hypotenuse are joined by welding. In addition, the two welding points are also firmly fixed by the auxiliary beam 56.
As a result, the steel frames at the corners of the building are firmly fixed by welding, and the connection between the corners is strong as well as the bolts, and the entire frame is strong and difficult to shake.
Furthermore, it is possible to disassemble the entire jig into a part consisting of a short side beam part, a long side and an oblique side, which makes it easier to carry by manpower between mountains.

  There are two beams corresponding to the short side, the outer beam 10 and the inner beam 15, but the outer beam 10 is located at the upper part of the long side beam 20 and the flange 34 of the upper side beam 32 of the oblique side. Attached to form the outer frame of the jig. As shown in FIG. 3, a roller 80 and a clamp 85 are attached to the two inner beams 15 using bolts (including nuts) 83 and 88. As a result, it is possible to replace the overhead power transmission line to be inspected with an optimal size according to the type and size of the inspection target or to disassemble it in order to make it easy to transport by hand in a steep mountain.

Although there are a total of four beams corresponding to the short sides, the upper part of the jig has a more solid structure. As will be described later, the two inner beams 15 are provided with auxiliary beams 42 that also serve as a support for the film mounting portion 60, which also leads to strengthening of the structure.
The roller 80 is placed on the overhead power transmission line 95 and rolled when carrying the entire jig equipped with the X-ray generator 90, film, etc. to the measurement point of the overhead power transmission line. For this reason, it has a concave shape and flanges on both sides, and is rotatably attached to the roller holding portion 81 via the roller shaft 82.
In addition, the weight is reduced by using aluminum.

When the entire jig is placed on the overhead power transmission line 95, the entire jig is inclined due to the mounting position of the relatively heavy X-ray generator 90 and its battery 91. As shown in FIG. 1, it is attached to the inner beam 15 with an inclination of about 35 degrees to the vertical plane.
Further, in order to prevent the roller 80 from being detached from the overhead power transmission line 95, the center part is located below the overhead power transmission line 95 and the roller 80 on both sides of the roller shaft 82 in a state where the roller 80 is put on the overhead power transmission line 95. Both ends of a high-strength resin derailment prevention string 84 that passes therethrough are connected.

When moving the entire jig to the shooting location on the overhead power transmission line 95 and when moving the entire jig to the steel tower after shooting is completed, a check rope (not shown) is used to check, as clearly shown in FIG. A check rope ring 13 for connecting the check rope to the outside of the jig near the right apex of the beam 10 on the outer side of the short side is horizontally attached.
At the time of photographing, the entire jig is manually transferred from the roller 80 to the clamp 85. At this time, since the overhead power transmission line is within the triangular framework, there is no risk of accidentally falling to the ground.
Further, in order to make the transfer as easy as possible, the roller 80 and the clamp 85 are set to have substantially the same height.

When the overhead transmission line is fixed by the clamp 85, as shown in FIGS. 3 and 4, the overhead transmission line 95 is located immediately below the center of the film, and its upper end is as shown in the AA sectional view of FIG. In addition, it is close to the lower end of the film 65.
In addition, since a lens cannot be used in X-ray photography, in order to obtain a clear X-ray photograph, in addition to the small X-ray source, the distance between the subject and the X-ray source is increased to some extent, and the film and the subject It is essential to bring them close together.

As shown in FIG. 4, the main part of the film mounting portion 60 is a flat shape as a whole, and the upper portion is formed of a square-shaped ceiling frame 61, and the four corners are formed on the inner side of the short side. The beam 15 is supported by a total of four metal hanging beams 64 that are suspended from the beam 41 that connects the vertexes at right angles to the auxiliary beam 42 that reinforces and supports the beam 15.
The lower part is composed of two U-shaped bottom frames 62, and the lower two bottom frames 62 are arranged to face each other with a space through which the overhead power transmission line 95 passes through the tip portions of the two legs. Furthermore, it is fixed to the ceiling frame 61 by welding with a side wall orthogonal to the overhead power transmission line 95.

A film 65 indicated by a dotted line in the AA sectional view of FIG. 4 is inserted into the space between the ceiling frame 61 and the bottom frame 62 through an opening in a direction perpendicular to the overhead power transmission line 95.
Further, bolts 63 with thread grooves are attached to the respective corners of the ceiling frame 61 and the bottom frame 62, whereby the bolts are inserted from both the upper and lower sides, and the overhead transmission line to be inspected at the tip of the bolt. It is possible to finely adjust the height of the film 65 in accordance with the outer diameter of the film, and to firmly fix the film 65 to the film mounting portion 60 in a state where the film 65 is in close contact with the upper part of the overhead power transmission line. .
Although not shown in the drawing, an acrylic plate is attached to the upper and lower sides of the film 65, a number plate for identifying the film is sandwiched between the lower acrylic plate and the film 65, and further fixed with a leaf spring. Is also possible.
Note that the ceiling frame 61 is shaped like a bracket and the upper part of the film is not covered with metal to prevent blurring of the image due to reflection of X-rays and to prevent exposure of people below. This is to reduce even a little. In order to prevent the film from vibrating due to the wind and to fix the film together with bolts or the like, it is preferable to install an acrylic plate above the ceiling frame 61 or between the ceiling frame and the film.

The X-ray generator 90 is heavy. Therefore, as shown in FIG. 2, a fall prevention rope is provided at the center of the auxiliary beam 57 that fixes and supports the upper part of the two beams on the lower side of the hypotenuse, and at a position almost opposite to the X-ray generator 90. A rope ring 59 is provided for tying. Since the rope ring 59 is installed in a conspicuous position, the operator may forget to tie the rope to the X-ray generator 90 and firmly fix the tied rope to the rope ring 59. Absent.
Further, a rubber band or the like is used for attaching the X-ray generator 90 to the jig, but a fixing hook (not shown) or the like is also provided.
Note that the battery is fixed to the lower part of the X-ray generator with a fastener-type band for use not only on the overhead power transmission line but also in remote areas.

Finally, vibration characteristics will be described.
The overhead power transmission line itself vibrates substantially continuously between about 10 to 100 Hz. For this reason, when the X-ray imaging jig or the X-ray apparatus resonates, not only a beautiful X-ray picture cannot be taken, it becomes difficult to perform an accurate inspection, but also a safety problem may occur. Therefore, the strain generated in each part of the jig and the natural frequency of the jig were measured, and the resonance with the overhead power transmission line was also investigated.

FIG. 5 shows the state of the vibration system performing the measurement. In FIG. 5, 12 is an X-ray imaging jig, 96 is a vibrator, 97 is a weight of 50 kg, and 99 is a displacement meter. The overhead power transmission line 95 to be measured has an overall length of about 20 m and a 15% UTS (tensile strength) tensile force (16,400 N) in a state of IACSR120sq (steel core No. aluminum alloy stranded wire, cross-sectional area 120 mm ² ) It is. The reason why the overhead power transmission line to be measured is IACSR120sq is that there is a high possibility of the occurrence of slight wind vibration.
Further, the weight 97 is likened to a person. For this reason, the vibration test was performed both when the weight 97 was added and when the weight 97 was not added. Although only one weight 97 is depicted in FIG. 5, one weight 97 is attached to each of the equidistant positions on both sides of the X-ray imaging jig 12.

FIG. 6 shows the position where the strain gauge is attached. In FIG. 6, 1 to 6 are pasting points, each of which is a vertical plate 24, a beam 32 on the upper side of the oblique side, a beam 31 on the lower side of the oblique side, a central portion of the beam 20 on the long side, an upper horizontal plate 22 and a lower side. This is a horizontal plate 23.
The measurement results when no weight is added are shown in FIGS. FIG. 7 shows the measurement results at positions 1 to 3 in FIG. 6, and FIG. 8 shows the measurement results at positions 4 to 6 in FIG. 6 and the amplitude of the overhead power transmission line.

As a result of the measurement, the distortion generated in the long side and the hypotenuse part of the unequal-sided right triangular prism-shaped jig that suspends the X-ray generator is about ± 8μ at the maximum. The vertical expansion and contraction of the wire is about 8 μm, which is very small compared to the wire amplitude of ± 2.6 mm. It seems that the damping effect by the bolt tightening and the play of the buttocks also contributes.
It can also be seen that the distortion generated at the location where the X-ray generator is attached is as small as ± 26 μ at the maximum, and the natural frequency of the location in the lateral direction is 28.3 Hz.

  Although data is omitted, when the weight 97 is added, the distortion is even smaller, and from experiments under other conditions, the distortion generated in each part of the X-ray generator, and hence the stress and expansion / contraction, are extremely small. It was confirmed that no resonance occurred in the vibration.

Next, although there is no direct relationship with the jig body, great care is taken in handling X-rays. Specifically, a cover is added to the X-ray emission button, and a key drop prevention cord for turning on the X-ray generator is attached.
In addition, the worker wears a survey meter.
In addition, a white tape is wound around the unused film so that it can be prevented from being reused accidentally by removing it every time it is used.
A lead plate is attached to the film case to prevent exposure.

It is a figure which shows notionally the side which looked at the X-ray imaging jig | tool of the overhead power transmission line of embodiment of this invention from the direction in which the overhead power transmission line is constructed. It is an A direction arrow directional view of FIG. It is a BB direction arrow line view of FIG. It is a figure which shows notionally the mounting part of a film. It is a figure which shows the structure of the measurement system in the vibration test of the jig | tool for X-ray imaging. It is a figure which shows the measurement location of the jig | tool for X-ray imaging. It is a figure which shows a part of measurement result of the jig | tool for X-ray imaging. It is a figure which shows a part of measurement result of the jig | tool for an X-ray imaging, and the mode of vibration of an overhead power transmission line.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Outside beam 11 of short side 12 Hook part 12 X-ray imaging jig 13 Ring 15 for check rope Inside beam 20 of short side Long beam 21 Vertical plate 22 Horizontal plate (upper side)
23 Horizontal plate (lower side)
24 Vertical plate 28 Hanging coupling bolt 31 Beam on the lower side of the hypotenuse 32 Beam on the upper side of the hypotenuse 33 Rotating part 34 Hook 40 Beam connecting the upper side of the hypotenuse 41 Beam connecting the apex of the right side 42 Supporting the inner beam Beams 50, 55, 56, 57 Auxiliary beams 59 Rope ring 60 Film mounting portion 61 Ceiling frame 62 Bottom frame 63 Film adjusting bolt 64 Hanging beam 65 Film 80 Brim roller 81 Roller holding portion 82 Roller shaft 83 Roller mounting bolt 84 Derailment prevention string 85 Clamp 88 Clamp mounting bolt 90 X-ray generator 91 Battery 95 Overhead power transmission line 96 Exciter 97 Weight 98 Rubber material 99 Displacement meter

Claims (16)

It is a jig with a triangular prism shape with unequal sides as a whole,
A skeleton structure having a beam corresponding to each side of two unequal right-angled triangles, three pairs of opposite vertices or beams near each other, and a plurality of auxiliary beams further connecting the beams. Yes,
Two beams with short sides sandwiching a right angle are positioned above when using the jig, and two auxiliary beams are attached to these two beams or in parallel between these two beams. If there are two beams or these two auxiliary beams, the moving part for moving the jig on the overhead power transmission line below each of the two beams and the overhead power transmission line A fixing part for fixing the jig is attached,
In the beam of the portion that connects the apexes at right angles to each other, a film mounting portion is positioned below the short-angled portion that sandwiches the right angle at a position that is a predetermined height with respect to the overhead power transmission line fixed by the fixing portion. Is mounted parallel to the side,
The lower part of the two beams that are the long sides sandwiching the right angle has a structure that allows the X-ray generator to be attached at a predetermined distance from the film mounting part,
The two beams serving as the oblique sides are each composed of an upper side beam and a lower side beam, and the upper side beam is rotatably attached to the lower side beam at the lower part thereof, and the upper part thereof is composed of two beams each serving as the short side. The lower side beam is fixedly supported by two beams having long sides sandwiching the right angle on the upper side via auxiliary beams, respectively. X-ray photography jig for electric wires.   2. The beam corresponding to each side of the two unequal right-angled triangles and the three pairs of opposite vertices or the vicinity thereof are metal pipes according to claim 1. X-ray imaging jig for overhead power transmission lines. The two beams which are short sides sandwiching the right angle and the beams located at the same height as these two beams are all joined by welding,
3. The aerial system according to claim 1 or 2, wherein the connection between the two beams having short sides sandwiching the right angle and the two beams having long sides sandwiching the right angle is bolt fastening. X-ray imaging jig for power transmission lines.   The bolt tightening that couples the two beams that are the short sides sandwiching the right angle and the two beams that are the long sides sandwiching the right angle is detachable and has a bolt detent. The jig for X-ray photography of an overhead power transmission line according to claim 3, wherein   5. The coupling between the two beams having long sides sandwiching the right angle and the beams other than the two beams having short sides sandwiching the right angle is made by welding. An X-ray imaging jig for an overhead power transmission line according to any one of the above.   The lower side beam is fixedly supported via two beams having long sides sandwiching the right angle on the upper side and auxiliary beams, respectively, at the position to be fixedly supported and at a position below the position. 6. An aerial transmission line X-ray imaging jig according to claim 1, wherein the connection with the other beam is made by welding.   It has two auxiliary beams mounted in parallel between two beams that are short sides across a right angle, and the moving part and the fixing part are both on the two auxiliary beams. The jig for X-ray photography of an overhead power transmission line according to any one of claims 1 to 6, wherein the jig is attached with a bolt.   In the state where the moving part has a roller in which a concave portion for fitting the overhead power transmission line is formed in the central part, and the X-ray generator is attached to the lower part of the jig and the roller is put on the overhead power transmission line, The X-ray imaging jig for an overhead power transmission line according to any one of claims 1 to 7, wherein the roller is attached so as to face in a vertical direction.   The moving part has a derailment prevention string, and the derailment prevention string is in a state where the roller is placed on the overhead power transmission line, the central part is located below the overhead power transmission line, and both end parts are 9. The jig for X-ray imaging of an overhead power transmission line according to claim 8, wherein the jig is attached so that the derailment prevention string is positioned near both ends of a member that supports the roller and on the opposite surface side of the roller.   The portion of the fixing portion that grips the overhead power transmission line and the concave portion below the roller of the moving portion are at the same height in the vertical direction from the two beams that are short sides across the right angle. The X-ray imaging jig for an overhead power transmission line according to claim 8 or 9, wherein the jig is used for X-ray imaging.   11. The moving part has a horizontal ring welded to the outermost part of the jig and to the two right-angled vertices of the unequal right-angled triangle. An X-ray imaging jig for an overhead power transmission line according to any one of the above. The planar shape is a Kanji shape,
It has a side wall in the direction perpendicular to the ceiling frame, the bottom frame, and the overhead power transmission line,
The ceiling frame is horizontally held by two beams that are short sides sandwiching the right angle, or by these two beams and a beam suspended from an auxiliary beam located at the same height as these two beams,
The bottom frame is formed with a notch for the overhead power transmission line located in the center, and bolts are screwed from below into the four corners,
The film can be loaded and unloaded from the side parallel to the overhead power transmission line.
In a state in which the jig is fixed to the overhead power transmission line by the fixing portion, it has a film mounting portion that can be adjusted so that the lower surface of the mounted film is in contact with the upper end of the overhead power transmission line. The jig for X-ray photography of an overhead power transmission line according to any one of claims 1 to 11,   Two vertically long and narrow vertical plates each having a hole formed in a vertical direction at a predetermined interval at a predetermined distance from the lower part of the two beams having long sides sandwiching the right angle and the film mounting portion, 2. An X-ray generator mounting portion having a structure in which a surface in which a hole is formed is disposed so as to face an inner side of a jig and is mounted by welding. 12. An X-ray imaging jig for an overhead power transmission line according to any one of 12.   The X-ray generator includes two upper and lower horizontal plates fixed at both ends to the two upper and lower elongated plates by bolts, and a vertical plate fixed at the center of the two upper and lower horizontal plates. The jig for X-ray imaging of an overhead power transmission line according to any one of claims 1 to 13, wherein the jig is fixed to the jig using a cable.   The two lower side beams are reinforced and joined to each other with an auxiliary beam at the upper part, and a rope for preventing the fall of the X-ray generator attached to the jig is fixed to the central part of the auxiliary beam. The jig | tool for X-ray imaging | photography of an overhead power transmission line in any one of Claim 1 thru | or 14 characterized by the above-mentioned. The fixing part for fixing the jig to the overhead power transmission line is:
A clamp for gripping and fixing the outer periphery of the overhead power transmission line;
The clamp has a collar so that the outer periphery of the overhead power transmission line having an outer diameter smaller than the hole for gripping the outer periphery of the overhead power transmission line of the clamp can be gripped and fixed. An X-ray imaging jig for an overhead power transmission line according to any one of claims 1 to 15.

Images