JP4919749B2 - Drilling tool for indirect hot wire method and emergency repair method for pole switch using this tool - Google Patents

Description

  The present invention, for example, in the situation where the outer casing of a pole-mounted power distribution device such as a pole-mounted switch is extremely corroded and rainwater has penetrated the inside, the internal power line construction method is used until the power distribution device is replaced. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drilling tool used for draining accumulated water and an emergency repair method for a pole switch using the drilling tool.

  On high-voltage overhead distribution lines, on-pillar switches such as high-pressure air load switches that open and close the distribution lines in normal times are installed on the pillars necessary for reducing accident blackouts and reducing work blackouts. is set up. The outer box of this pole switch is usually made of an iron plate of about 3 mm and the surface thereof is painted. When raining, rainwater may enter the inside through the hole.

  The electric power company grasps the state of this corrosion and conducts regular inspections to replace it periodically, and replaces the pole switch with such a severe corrosion of the outer box. However, it usually takes time to prepare for the procurement of pole switches. In addition, replacement work of the pole switch is performed by power failure of the distribution circuit where the pole switch is installed, but it requires advanced technology and must be performed carefully. There is a possibility. However, depending on the electric circuit, there may be a situation where a power outage cannot be performed for a long time. In such a case, it is necessary to make an emergency repair and extend the life of the pole switch.

In this emergency repair, the water accumulated inside the pole box outer casing may come into direct contact with the high-voltage charging part and cause a ground fault. It is important to prevent the occurrence of this. However, when draining the water that has accumulated in the outer box, the operator is standing in an unstable position directly below the pole switch and drilled in the bottom plate using an electric drill or the like. The tip of the drill may come into contact and an electric shock may occur. Even if such an accident does not occur, water containing rust that has accumulated inside the drill falls and enters the eyes of the operator. There is a safety problem.
JP-A-7-130250 JP-A-9-213177 JP 2002-75142 A JP 2003-223833 A JP 2004-55310 A

  Accordingly, an object of the present invention is to easily and surely and safely drain the water accumulated inside the pole distribution device such as the pole switch, in which the outer box is extremely corroded and rainwater has entered inside. An object of the present invention is to provide a drilling tool capable of preventing a tie-up accident and the like and prolonging the life of pole-mounted power distribution equipment. Moreover, an object of this invention is to provide the emergency repair method using the said tool about a pole switch among pole distribution devices.

  In order to achieve the above object, a drilling tool for indirect hot wire construction of the present invention (hereinafter simply referred to as a drilling tool) includes a support rod, a puncture member attached to one end of the support rod, and having a puncture end. And a support member for supporting the support rod in the middle thereof.

  The drilling tool of the present invention uses the principle of the lever, the bearing rod as a lever rod, the contact with the support member in the middle and the puncture member mounted at the tip of the bearing rod as a fulcrum and an action point, respectively. In addition, when an operator exerts an operating force on the other end of the bearing rod, the bottom plate of the pole-mounted power distribution device is perforated by the puncture end portion. By using the drilling tool of the present invention, the operator does not have to be in an unstable posture directly under the pole power distribution device, and can easily, reliably and safely perform the drilling work without requiring a large force. Can do.

  Further, the emergency repair method of the pole switch according to the present invention is an emergency repair method by an indirect hot wire construction method of the pole switch in which rainwater has entered through a hole caused by corrosion of the outer box plate material. Using the drilling tool according to any one of 1 to 5, forming a drainage hole penetrating the bottom plate of the pole switch, and draining the intrusion water from the drainage hole; And a step of attaching a waterproof patch material to close the hole of the outer box plate material.

This drains rainwater or the like that has entered the pole distribution device, and prevents rainwater from entering the pole distribution device even in the case of rain. As the waterproof patch material, it is preferable to use a microporous material which allows water vapor to pass but does not allow liquid water to pass. By using such a material patch material, inside when prevents the entry of rainwater from the outside through the perforation by corrosion, became pole power distribution equipment by evaporation of the infiltration water and high humidity conditions Of water vapor can be dissipated.

  According to the drilling tool of the present invention, the water that has entered the inside of the pole-mounted power distribution device with a markedly corroded outer box can be reliably and safely removed, so that a distribution line accident can be prevented. In addition, draining the pole power distribution device using the drilling tool of the present invention, and using a waterproof patch material to close the perforated portion and repairing it quickly, thereby extending the life of the pole power distribution device. Can be achieved.

  As described above, the drilling tool of the present invention includes a support rod that serves as a lever rod, a puncture member that has a puncture end as an action point, and a support member that serves as a fulcrum for a contact point with the support rod. Utilizing the principle, the tip of the puncture end is pressed against a location (for example, the bottom plate) suitable for draining the outer box of the pole power distribution device, and a drain hole penetrating the plate of the outer box is drilled. .

  The bearing rod is not particularly limited as long as it has bending strength and deflection resistance that can be used as a lever rod. For example, a rod-like body made of metal, synthetic resin, wood, or a tubular body is used. it can. In the case where a metal rod or tube is used as the support rod, an insulating coating is preferably applied to the entire outer peripheral surface or a part thereof. As such a supporting rod, for example, an insulating operation rod used in the indirect hot wire method can be suitably used. This insulating operation rod is a metal pipe with an insulating coating applied to the entire outer surface of an iron pipe, and is provided with a mounting portion on the tip of which various tip tools can be mounted.

  The puncture end is provided with a sharp point that penetrates the outer box plate of the columnar power distribution device, and the outer shape thereof is, for example, a pyramid shape, a cone shape, an elliptical cone shape, a nail shape, a pin shape, etc. can do. These shapes can be appropriately selected in consideration of the hole diameter of the drain hole to be drilled. The height should be longer in a common sense range than the thickness of the outer box of the pole-mounted power distribution device. Moreover, the material will not be restrict | limited especially if a drain hole can be drilled in an outer case, It can select suitably from various metals, alloys, ceramics, etc. with high hardness. The puncture end portion may be fixed integrally to the puncture member (including a case where the puncture end portion is integrally formed), or may be detachably attachable.

  The puncture member having the puncture end transmits the operating force applied to the support rod to the pointed end of the puncture end when using the drilling tool of the present invention, and thereby the on-pillar power distribution device to be drilled It functions so as to be pressed against a predetermined position of the outer box plate material, and as long as it has such a function, it is not limited to its strength characteristics and outer shape. Specific examples of such external shapes include, for example, a sphere, an elliptic sphere, a cylinder, a substantially cylinder having a plane along the circumferential direction of the circumference, an elliptic cylinder, a triangular cylinder, a quadrangular cylinder, a truncated cone, an ellipse, and the like. Examples include a frustum shape and a truncated pyramid shape. It is preferable that the puncture end is located on one end face in the length (height) direction.

  Depending on the pole power distribution device, there are cases where the internal components are stored close to the inner surface of the plate at the position where the outer box is to be punched. In this case, if a drainage hole is drilled at that position using the drilling tool of the present invention, the tip of the puncture end may come into contact with the internal part, possibly damaging it. Therefore, the puncture member or the puncture end portion can be provided with a stopper portion that prevents the puncture end portion from penetrating too deeply into the outer box of the pole power distribution device during the drilling operation.

  As this stopper portion, for example, the puncture member or the puncture end portion is projected from a predetermined position in the length direction into a hook shape perpendicular to the direction so as to regulate the maximum penetration depth of the puncture end portion. A provided flat surface can be used. Such a flat surface may be formed by providing the puncture end portion on a part of one end surface of the puncture member. Further, instead of or in addition to such a bowl-shaped flat surface, it is also possible to use a casing having a predetermined plate thickness provided with a through-hole through which the puncture end can be inserted as a stopper. . In this case, the housing may be fixed at a predetermined position by drilling the insertion hole so as to fit the outer peripheral surface of the puncture end, and one end surface in the thickness direction of the housing May be fixed in contact with the bowl-shaped flat surface. In this case, there is an advantage that the maximum penetration depth of the puncture end can be changed by preparing a plurality of casings having different plate thicknesses.

  When attaching the puncture member to the tip of the support rod, the height direction of the puncture end is directed to the longitudinal axis direction of the support rod so that the height direction of the puncture end is directed to an angle at which drilling can be performed on the pole power distribution device. It may be fixed at a fixed angle or may be rotatable. In either case, if necessary, a mounting portion can be provided at the tip of the puncture member or the bearing rod, or a mounting portion can be provided on one of them and a mounted portion on the other.

  Furthermore, it is preferable that the puncture member includes a hook at an end portion opposite to an end surface having the puncture end portion. A receiver or the like for receiving drainage can be hung on the hook. There are no particular restrictions on the type, material and shape of the hook, but in order to prevent the receiver suspended etc. from coming off and falling, a hook with a stopper that can open and close its opening is used. Is preferred. This hook may be directly fixed to the other end surface of the puncture member using a known means, or may be detachably and swingably attached via a connecting fitting such as an eyebolt fixed to the end surface. . Thus, by providing a hook and suspending a receiver or the like on the hook, when the puncture member and the receiver are viewed as one combination, the center of gravity position in the combination is supported by the puncture member or It can be moved more to the receiver side than the position of the pivoting shaft or shaft-like projection, and as a result, the direction of this combination can be maintained in a substantially vertical direction during drilling.

  The support member can support the support rod in the middle from below, or can support it by hanging from above. When the support rod is supported from below, for example, a support column having a predetermined height may be erected in the vertical direction on the bucket of the ground or an aerial work vehicle, and the support rod may be supported at the upper end thereof. In addition, when hanging and supporting from above, for example, the suspension support member is suspended from the arm of the utility pole or the suspension bracket of the pole-mounted power distribution device to be drilled, and the support rod is suspended and supported at the lower end thereof. Good. It is preferable that the support column or the suspension member can be expanded and contracted and the total length thereof can be adjusted. Among these, in consideration of the circumstances such as the fact that it is impossible to stand up the pole around the power pole or to close the bucket of the aerial work vehicle, in the present invention, the support rod is suspended from above as the support member. It is preferable to use a hanging support member to support.

  When the support rod is suspended and supported, the suspension support member is not particularly limited as long as it supports the weight of the support rod and the like and can withstand the load applied to the drilling operation. In addition to a pipe body, for example, a wire rope or a rope can be used. One end of the support member can be attached with a support metal fitting that supports the swing through the support rod. However, when a rope is used as the support member, it may be directly connected to the support rod. . Examples of the support fitting include eyebolts, hooks, carabiners, and shackles, and these can be attached to the suspension support member by a known method.

  When the support rod is inserted into and supported by the support fitting, it is preferable to attach a drop-off preventing member to the support rod. As this drop-off preventing member, a bowl-shaped body having a diameter larger than the outer dimension of the support fitting can be preferably used. The drop-off preventing member made of this hook-shaped body may be one whose center opening is in close contact with the outer periphery of the bearing rod and cannot be changed in its mounting position, but preferably its mounting position is changed along the bearing rod. What you can do is good. By attaching the drop-off preventing member to the support rod, it is possible to prevent the operator from sliding off the support fitting even when the operator releases his / her hand from the grip portion of the support rod.

  Hereinafter, embodiments of the drilling tool of the present invention will be described in detail with reference to the accompanying drawings. However, it goes without saying that the present invention is not limited to the following embodiments. FIG. 1 shows an example of an embodiment of the drilling tool of the present invention, and FIG. 2 shows an example of another embodiment of the drilling tool of the present invention. The embodiment shown in FIG. 2 is different from the embodiment shown in FIG. 1 in that the puncture member 3 and its mounting state on the support rod 2 are different, so that only the tip of the support rod 2 is illustrated. Other end sides and support members are not shown. In the following drawings, the same reference numerals are used for the same or common parts.

  As shown in FIG. 1, the drilling tool 1 of the present invention includes a support rod 2, a puncture member 3, and a suspension member 4. The support rod 2 is made of a metal tube whose outer periphery is insulation-coated, and includes a mounting portion 20 for pivotally supporting the puncture member 3 at one end, and a gripping portion 22 at which the operator grips the support rod 2 at the other end. Is provided. The mounting portion 20 includes two shaft support pieces 19 and 19 that extend in parallel to face each other along the axial direction of the support rod 2, and have a substantially U shape so as to grip the puncture member 3 from both side surfaces thereof. Bolt through holes 191 and 191 are formed in the two shaft support pieces 19 and 19 near the tips, respectively.

  The puncture member 3 that is rotatably mounted on the support rod 2 via the mounting portion 20 includes a puncture member main body 10, a puncture end portion 12 that is positioned substantially at the center of one end surface in the length direction, and the other end surface. It consists of a fixed hook 13.

  The puncture member main body 10 has a substantially cylindrical shape having two parallel planes facing the circumferential surface, and the mounting portion 20 so that these two planes abut against the inner surfaces of the support pieces 19, 19, respectively. Is fitted. Through holes (not shown) penetrating these two planes are formed, and bolts as shafts 15 are inserted into the through holes and bolt through holes 191 and 191. The bolt 15 can be fixed by screwing a nut (not shown) or the like to its tip. Thus, the puncture member main body 10 is pivotally supported by the shaft 15 and is rotatable around the shaft 15.

  The puncture member main body 10 has a puncture end portion 12 substantially at the center of one end surface in the length direction, and an outer collar 11 extending outward in the radial direction is provided on the end surface. The end surface having the outer casing 11 serves as a stopper that prevents the puncture end 12 from reaching the deep part of the outer box from the bottom plate of the outer box of the pole-mounted power distribution device and damaging the internal components.

  A hook 13 having a stopper 14 is attached to the other end surface of the puncture member body 10. The stopper 14 is urged to always close the hook opening by a torsion coil spring or the like, and opens the opening against the urging force only when the handle of the receiver is detached from the hook. It is preferable that

  When an insulating operation rod is used as the support rod 2, as shown in FIG. 2, a connection provided with a star seat 18 that is usually used to connect the insulation operation rod 2 and a known tip tool attached thereto. A tool or the like can also be suitably used as the mounting part 20 (hereinafter, the reference numeral 20 is also used for this connecting tool). The connector 20 includes a mounting portion 21 attached to the distal end of the insulating operation rod 2 and a substantially conical shaft support piece 19 that is divided in half along the length direction of the connector 20 at the distal end. The shaft support piece 19 is formed with a screw hole 191 penetrating from the approximate center of the halved surface to the outer periphery thereof, and a plurality of teeth are arranged at predetermined intervals on a circumference centering on the screw hole 191. And is formed with a Kikuza part 18.

  The puncture member 3 in FIG. 2 has a puncture end portion 12 at one end in the length direction of a columnar puncture member main body 10, and an outer collar 11 is provided flush with the end surface. In the puncture member main body 10, a mounted portion 16 having a shaft through hole 161 is fixed to the side surface along the length direction, and the mounted portion 16 and the shaft support piece 19 are connected to a thumbscrew (shaft). By being connected by 15, the puncture member 3 can be rotated. In order to facilitate the rotation of the puncture member 3 around the butterfly screw 15, the butterfly screw 15 is provided between the projecting piece 16 and the chrysanthemum portion 18 along the axis thereof and the head of the projecting piece 16 and the butterfly screw 15. Are fitted with flat washers 17, 17 respectively. On the other end surface of the puncture member 3, a hook 13 having an eyebolt 101 fixed thereto and a stopper 14 is attached.

  The puncture member 3 shown in FIG. 2 can also be used as a tip tool for drilling in the indirect hot wire method that can be attached to the insulating operation rod 2 in a state in which the puncture member 3 is connected to the connector 20 via the mounted portion 16. it can.

  The suspension support member 4 shown in FIG. 1 suspends and supports the middle of the support rod 2 from, for example, an arm of a power pole above the pole-distribution device, a brace or a mount of the pole-distribution device (none of which is shown). To do. The suspension support member 4 has a wire rope 30 and a shackle 31 attached to one end thereof. The support rod 2 is inserted through the opening of the shackle 31. A manual winch (see reference numeral 29 in FIG. 3) such as a shimmer (trade name) can be interposed in the suspension support member 4 in the middle.

  In the embodiment shown in FIG. 1, when an operator applies a downward operating force to the grip portion 22 of the support rod 2, the contact point between the shackle 31 and the support rod 2 serves as a fulcrum, and the puncture member 3 (puncture end portion 12). The puncture member 3 is raised by the principle of the lever with the action point as a point of action. By using the drilling tool of this embodiment, for example, a drain hole is surely drilled by the indirect hot wire method in the bottom plate of the pole-top distribution device in which rainwater has entered through a hole caused by corrosion, and the water that has entered inside is drained. As a result, distribution line accidents can be prevented. Moreover, in this drilling operation, the drilling tool of the present invention uses the principle of the lever, so that the operator does not need to apply a large operating force, the fatigue level can be reduced, and the operator can be directly under the pole power distribution equipment. Since there is no work, there is no danger of wearing waste water containing rust, and there is no safety problem.

  Next, an emergency repair method by an indirect hot wire method using the drilling tool of the present invention will be described for a pole switch that is a kind of pole power distribution device. FIG. 3 is a diagram showing an implementation status of the emergency repair method for a pole switch according to the present invention. In this figure, it is assumed that the pole switch 50 suspended from the arm 61 on the utility pole 60 via the mounting bracket 51 has a hole 52 in the outer box due to significant corrosion, and rainwater has entered inside. .

  One end of the wire rope 30 is hung near the outermost end of the arm 61, and this is suspended. As shown in FIG. 3, a manual winch 29 is attached to the wire rope 30 in the middle, and a shackle 29 is attached to the lower end.

  On the other hand, a drop-off prevention member 24 is previously attached to the bearing rod 2 in the middle, and a puncture member 3 is rotatably attached to the tip thereof. If necessary, the puncture end 12 is prevented from penetrating deeply into the pole switch 50 to cause damage to internal parts or a distribution line accident. The outer surface (not shown) may be inserted in contact with the end surface of the puncture member body 10.

  The shackle 29 is removed from the wire rope 30, and the U-shaped portion of the shackle 29 is placed between the puncture member 3 and the drop-off preventing member 24 of the support rod 2, and in this state, the support rod 2 is lifted and the wire rope 30 The bearing rod 2 is suspended and supported by screwing the thumbscrew of the shackle 29 at the lower end. Thereafter, a manual winch 29 is prepared, the length of the wire rope 30 is adjusted, the support rod 2 is moved up and down to adjust the height position of the fulcrum, and the support rod 2 inserted through the shackle 29 is moved in the longitudinal direction. Thus, the puncture member 3 is brought to a predetermined position directly below the bottom plate of the pole switch 50.

  When the handle of the receiver 40 made of a tool bag with a plastic bag is hung on the hook 13 attached to the puncture member main body 10, the puncture member 2 rotates around the shaft 15 due to the weight of the receiver 40, It is maintained in a substantially vertical state. A net 41 is attached to the open end of the receiver 40.

  The operator grips the gripping portion 22 of the support rod 2 and applies an operating force downward thereto, so that the puncture member 3 is raised according to the principle of the lever, and the puncture end portion 12 is connected to the pole switch (outer box ) A predetermined portion of the 50 bottom plate is penetrated and a drain hole (not shown) is formed. When the puncture end 12 is removed from the drainage hole, the water inside the pole switch 50 is drained and stored in the receiver 40.

  On the other hand, the periphery of the hole 52 caused by the corrosion of the upper surface of the column switch 50 is polished by a known method. For polishing, for example, a known file handle attached to the tip of an insulating operation rod or the like can be used. The file may be fixed to the insulating operation rod so that its length direction forms a certain angle with respect to the long axis direction of the insulating operation rod, but the angle may be attached to be adjustable.

  In the latter case, using the connecting tool (mounting portion 20) shown in FIG. 2, the mounting end 21 is mounted on the tip of the insulating operating rod, and the file handle portion is fixed to the opposite half-split surface. You may make it connect with a bolt and a nut by facing a seat adapter. In this case, the angle formed between the file and the operating rod can be freely adjusted by loosening the nut screwed to the bolt.

  The patch material that is attached to the perforated portion and its periphery to close the hole is a material having at least waterproofness, and a material having a form such as a film, a sheet, a woven fabric, or a non-woven fabric can be used. The patch material is preferably a microporous material that allows water vapor to pass but does not allow liquid water to pass. A typical example of such a microporous material is Gore-Tex (trade name, registered trademark: manufactured by Gore-Tex). In addition, Gore-Tex is a thin film of highly functional polymer centering on porous expanded polytetrachloroethylene (ePTFE). Furthermore, this patch material may be provided with heat resistance, flame retardancy, weather resistance and the like.

  Such a patch material is cut into a circular shape or a quadrangular shape at the time of repair work, and it is preferable to provide an ear portion at each facing position. Except for these ears, apply a known adhesive to the adhesive surface of the thin film piece, and then apply it to the peripheral area of the perforated part using a gripping tool for indirect hot wire construction. It is easy to grip with a gripping tool by folding it in two so that the ears are overlapped with the adhesive surface facing outward.

  The step of closing the perforated portion using this patch material may be performed either before or after the step of forming the drainage hole in the bottom plate of the above-mentioned column switch outer box.

  As explained above, by implementing the emergency repair method of the present invention on a pole switch that has a hole that is extremely corroded and has rainwater intrusion, even if it takes time to replace the pole switch, it can be replaced. Can prolong life.

It is a perspective view which shows an example of embodiment of the drilling tool of this invention. It is a figure which shows the example of another embodiment of the drilling tool of this invention. It is a figure which shows the implementation condition of the emergency repair method of the pole switch of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drilling tool 2 Bearing rod 3 Puncture member 4 Support member (suspending member)
DESCRIPTION OF SYMBOLS 10 Puncture member main body 11 Outer collar 12 Puncture end part 13 Hook 14 Detachment 19 Axial support piece 20 Attachment part 21 Base (attachment part)
22 gripping part 24 drop-off prevention member 29 wire rope manual winch 30 wire rope 31 shackle 40 receiver 41 wire net 50 pole switch 51 hanging bracket 60 utility pole 61 arm W direction of operating force

Claims (7)

  For indirect hot wire construction comprising a bearing rod, a puncture member attached to one end of the bearing rod and having a puncture end, and a support member for supporting the middle of the bearing rod in the middle Drilling tool.   2. The drilling tool according to claim 1, wherein an intermediate portion of the puncture member is pivotally or pivotally supported at a distal end of the support rod and is rotatable.   The puncture tool according to claim 1 or 2, wherein the puncture member includes a hook at an end opposite to the puncture end.   The drilling tool according to any one of claims 1 to 3, wherein the support member suspends and supports the middle of the support rod from above.   The drilling tool according to any one of claims 1 to 4, wherein the support member is adjustable in overall length.   An emergency repair method using an indirect hot wire method for a pole switch in which rainwater has entered through a hole caused by corrosion of an outer box plate material, using the drilling tool according to any one of claims 1 to 5 Drilling a drainage hole penetrating the bottom switch of the pole switch and draining the infiltrated water from the drainage hole, and attaching a waterproof patch material to the hole of the outer box plate The method of emergency repair of a pole switch characterized by including the process of plugging. The emergency repair method for a pole switch according to claim 6 , wherein the patch material is made of a microporous material that allows water vapor to pass but does not allow liquid water to pass.

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