JP2014096284A - Insulation support member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulation support member which allows a visual check of cracks in an upper part of an insulation support member from the ground.SOLUTION: A tension insulator 1 is arranged between an electric wire and a utility pole supporting the electric wire and provided with a hollow part 20 sealed with a coloring member 30 consisting of a colored liquid within a part of the insulator body 10 exposed to the outside. When a crack occurs in the tension insulator 1, the coloring member 30 flows out through the crack and colors the tension insulator 1. The crack of the tension insulator 1 can be confirmed by worker's visual check of the coloring. Especially, when a crack occurs in an upper part of the tension insulator 1, a check of the coloring from the ground is feasible because the coloring member 30 flows down while coloring the surface of the tension insulator 1.

Description

  The present invention relates to an insulating support member such as an insulator.

  Conventionally, an insulator is mainly used as an insulating support member for insulating between an electric wire and its support (for example, a utility pole). The insulator may be cracked by lightning, and the insulator that has cracked needs to be replaced.

  However, since the insulator is often arranged at a place away from the ground, an operator often performs visual inspection work of the insulator using binoculars or the like. However, if, for example, the bottom of the insulator is dulled due to dirt or rust and black streaks are formed, the operator may erroneously recognize the black streaks as cracks.

  Therefore, in order to make it easier to confirm the deterioration of the insulator, the technique described in Patent Document 1 has been proposed. Patent Document 1 discloses a film containing a microcapsule in which a coloring material that develops color by reacting with a dye or an atmospheric component is encapsulated and the outer shell is damaged in response to a change in external stress. It describes a deterioration display type suspension insulator that can display deterioration of an insulator by being formed on the surface.

JP 2000-276957 A

  However, in the technique described in Patent Document 1, since the number of microcapsules that are damaged due to deterioration of the insulator is limited, it is difficult to secure the amount of coloring members necessary for coloring. For this reason, there is a risk of missing a crack when viewed from the ground.

  In particular, when a crack occurs in the upper part of the insulator, it becomes difficult to confirm the crack visually from the ground. In order to check for cracks in the upper part of the insulator, for example, it is conceivable that an operator gets into a monitoring helicopter aircraft and observes it from the air, but in this case, the cost for flying the helicopter aircraft is increased.

  It is an object of the present invention to provide an insulating support member that solves such problems and realizes visual confirmation of cracks in the insulating support member easily and reliably from the ground.

  In order to achieve the above object, the present invention has the following configuration.

  (1) An insulating support member that is disposed between an electric wire and a support that supports the electric wire, and is a hollow that encloses a colored liquid inside a portion of the insulating support member that is exposed to the outside. An insulating support member comprising a portion.

  According to (1), when a crack occurs in the insulating support member, the liquid flows out from the crack and the insulating support member is colored. When the worker visually recognizes this coloring, cracks of the insulating support member can be confirmed. In particular, when a crack occurs in the upper portion of the insulating support member, the liquid flows down while coloring the surface of the insulating support member, so that it is possible to confirm the coloring from the ground. In this way, it is possible to easily and reliably check the cracks of the insulating support member from the ground.

  (2) The insulating support member according to (1), wherein the liquid is sealed in the hollow portion in a pressurized state.

  According to (2), when a crack occurs in the insulating support member, the insulating support member is surely colored by flowing out from the crack so that the liquid is ejected.

  (3) An insulating support member disposed between an electric wire and a support that supports the electric wire, and a water-soluble coloring member is provided inside a portion of the insulating support member body exposed to the outside. An insulating support member.

  According to (3), when a crack occurs in the insulating support member, rainwater flows from the crack, is colored by the internal coloring member, and flows out to the outside, thereby coloring the insulating support member. When the worker visually recognizes this coloring, cracks of the insulating support member can be confirmed. In particular, when a crack occurs in the upper part of the insulating support member, the colored rainwater flows down while coloring the surface of the insulating support member, so that it is possible to confirm the coloration from the ground. In this way, it is possible to easily and reliably check the cracks of the insulating support member from the ground.

  (4) In (3), the insulating support member body has a rotating body shape, and the colored member forms a band-shaped colored layer that goes around the inside of the insulating support member body. Insulating support member.

  According to (4), for example, when the insulating support member between the electric wire and the support is arranged in the horizontal direction, a part of the colored layer is always positioned above the insulating support member. For this reason, when cracks occur in the upper part of the insulating support member, it becomes possible to color the rainwater more reliably, and the colored rainwater flows down while coloring the surface of the insulating support member. Confirmation becomes possible.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to perform the visual confirmation of the crack of an insulating support member easily and reliably from the ground.

It is a front view including the partial cross section which shows the structure of the insulation support member in 1st Embodiment of this invention. It is a perspective view which shows the state which attached the insulation support member shown in FIG. 1 to the utility pole. It is a front view including the partial cross section which shows the structure of the insulation support member in 2nd Embodiment of this invention. It is a front view including the partial cross section which shows the other structure of the insulation support member in 2nd Embodiment of this invention.

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

[First Embodiment]
FIG. 1 is a front view including a partial cross section showing a configuration of an insulating support member in the first embodiment of the present invention. The tension insulator 1 corresponding to an example of an insulating support member includes an insulator main body 10, a cap metal fitting 12, and a pin metal fitting 14 corresponding to an insulating support member main body.

  The tension insulator 1 has salt resistance, and is particularly disposed between a utility pole and an electric wire installed near a sea.

  The insulator body 10 is manufactured by subjecting a porcelain material to kneading, molding, and drying, and then applying glaze and baking. The insulator body 10 has a rotating body shape and includes a cylindrical body 10a and a bottomed cylindrical head 10b connected to the body 10a.

  The trunk | drum 10a and the head 10b are coaxial, and the diameter of the trunk | drum 10a is larger than the diameter of the head 10b. For this reason, the level | step difference 10c is formed in the boundary part of the trunk | drum 10a and the head 10b. Further, an inner cylindrical portion 10d is provided inside the trunk portion 10a. The inner cylindrical portion 10d is erected from the step 10c, and when the insulator body 10 is viewed from the opening side, the trunk portion 10a and the inner cylindrical portion 10d are concentric. The tip of the inner cylindrical portion 10d slightly protrudes from the opening of the trunk portion 10a.

  For the convenience of the following description, the head 10b side of the central axis of the insulator body 10 is referred to as the upper side, and the opening side of the body 10a is referred to as the lower side.

  The cap metal fitting 12 is a bottomed, substantially cylindrical member that covers the head 10b, and is made of metal. A pair of extending pieces 12a are erected on the top of the cap fitting 12, and hole portions 12b are formed in the pair of extending pieces 12a so as to face each other. Moreover, the space | interval of a pair of extension piece 12a is set to the magnitude | size in which the connection part 14a of the pin metal fitting 14 can be inserted.

  The pin fitting 14 is formed of a cylindrical metal rod that is longer than the insulator body 10, one end portion is formed thick, and the other end portion is formed with a connecting portion 14 a. The connecting portion 14a is processed into a flat plate shape, and a hole portion 14b is formed in the central portion of the flat plate.

  Further, a cement member (not shown) is filled between the head portion 10 b and the cap fitting 12. Thereby, the cap metal fitting 12 is fixed to the insulator body 10. Further, one end portion of the pin fitting 14 is inserted into the inner cylindrical portion 10d and positioned inside the head portion 10b. Then, the cement member 16 is filled into the head 10b. As a result, the pin fitting 14 is fixed to the insulator body 10.

  Moreover, as shown in FIG. 1, the hollow part 20 is formed in the inside of the trunk | drum 10a. The hollow portion 20 is formed inside a region exposed to the outside of the trunk portion 10a. Here, the hollow portion 20 may be formed as a single space, a plurality of spaces connected to each other, or a net shape.

  Further, the insulator body 10 is formed with an injection port 22 for injecting a liquid coloring member 30 into the hollow portion 20. The injection port 22 is closed by a rubber plug 24. The rubber plug 24 has a cylindrical shape, and a hole (not shown) is formed in the center along the central axis. This hole is closed by elastic deformation when a rubber stopper is attached to the inlet 22.

  When the liquid coloring member 30 is injected into the hollow portion 20, a probe (not shown) for injecting the coloring member 30 is inserted into the hole of the rubber stopper, and the probe is inserted through the probe (not shown). Then, the coloring member 30 is injected. After the specified amount of the coloring member 30 is injected, an appropriate amount of air is introduced into the hollow portion 20 through a probe (not shown) to increase the pressure in the hollow portion 20. In addition, the coloring member 30 and the injection amount of air are appropriately set in consideration of the size of the hollow part 20 and the pressure change in the hollow part 20 due to changes in temperature.

  FIG. 2 is an explanatory view showing an example of attachment of the tension insulator 1. The example shown in FIG. 2 uses two tension insulators 1. When connecting the tension insulator 1, the connecting portion 14 a of one tension insulator 1 is inserted between the pair of extending pieces 12 a of the other tension insulator 1 in FIG. The two tension insulators 1 are formed by passing one connecting pin (not shown) through the hole 14b and the hole 12b in a state in which the part 12b is aligned.

  Then, the electric wire 110 is connected to the connecting portion 14a of the two tension insulators 1, and the fixing member attached to the electric pole 100 is connected to the extending piece 12a, whereby the electric pole 100 and the electric wire 110 are insulated. It becomes.

  When a crack occurs in the tensile insulator 1 due to a lightning strike, the colored member 30 is ejected from the crack, and the colored member 30 flows down while coloring the surface of the tensile insulator 1. Thereby, since the lower part of the tension insulator 1 is colored, coloring becomes visible to the worker on the ground.

  When the worker confirms the colored tension insulator 1, the worker promptly replaces the colored tension insulator 1.

  As described above, according to the first embodiment of the present invention configured as described above, for example, when a crack is generated in the upper portion of the tension insulator 1, the liquid coloring member 30 flows out from the crack, and the tension resistance Insulator 1 is colored. When the worker visually recognizes this coloring, it is possible to confirm cracks in the upper portion of the tension insulator 1. Further, since the liquid coloring member 30 is sealed in the hollow portion 20 in a pressurized state, when a crack is generated in the tensile insulator 1, the tensile strength is generated by flowing out the liquid from the crack. The insulator 1 is reliably colored. In this way, visual confirmation of cracks in the tension insulator 1 can be performed easily and reliably from the ground.

[Second Embodiment]
FIG. 3 is a front view including a partial cross section showing the configuration of the insulating support member in the second embodiment of the present invention. In addition, about the member same as the member in 1st Embodiment shown in FIG. 1, or the member of the same function, detailed description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  In the second embodiment, instead of providing the hollow portion 20 and the injection port 22 in the trunk portion 10a of the insulator body 10 in the first embodiment shown in FIG. 1, as shown in FIG. The colored layer 40 is formed inside.

  The colored layer 40 is made of a water-soluble colored member, and is formed in a layered manner by applying a water-soluble colored member to the portion forming the body portion 10a when kneading and forming the porcelain material when the insulator body 10 is manufactured. Further, it is formed by coating a porcelain material thereon. The colored member is preferably a member that can maintain water solubility even after the firing step.

  Further, the colored layer 40 is formed in a cylindrical shape that circulates around the inside of the insulating support member main body in a strip shape.

  When a crack is generated in the tension insulator 1 of the second embodiment, rainwater enters from the crack when it rains. At this time, since the colored layer 40 is formed in a cylindrical shape, a part of the colored layer 40 exists near the cracked portion. For this reason, when rainwater infiltrates from a crack, the rainwater is colored by the colored layer 40 being melted by the rainwater. Furthermore, the colored rainwater flows out and flows down while coloring the tensile insulator 1. Thereby, since the lower part of the tension insulator 1 is colored, the coloring to the tension insulator 1 can be visually recognized by workers on the ground.

  As described above, according to the second embodiment of the present invention configured as described above, when a crack occurs in the upper portion of the tension insulator 1, rainwater flows from the crack and is colored by the internal colored layer 40. By flowing out to the outside, the tension insulator 1 is colored. When the worker visually recognizes this coloring, the crack of the tensile insulator 1 can be confirmed.

  The tension insulator 1 is disposed between the electric wire 110 and the utility pole 100 in the horizontal direction. At this time, since the colored layer 40 is formed in a ring shape and a belt shape, a part of the colored layer 40 is always positioned above the tension insulator 1. For this reason, when cracking occurs in the upper part of the tension insulator 1, it becomes possible to color rainwater more reliably, and the colored rainwater flows down while coloring the surface of the tension insulator 1. Coloration can be confirmed.

  In addition, as the coloring material for forming the colored layer 40, it is possible to apply a member that has a heat melting property and maintains a liquid state after being melted. Thereby, the portion of the colored layer 40 formed in the kneading and forming process for forming the insulating support member main body becomes the hollow portion 20 shown in FIG. 1 after firing, and the colored liquid is sealed in the hollow portion 20. It becomes possible to be in a state.

  As mentioned above, although embodiment of this invention was described, embodiment of this invention is not restricted to embodiment mentioned above. For example, in the embodiment described above, the salt-proof tension insulator 1 is described as an example of the insulating support member. However, the present invention is not limited to this, and can be applied to a general tension insulator 1 that is not salt-resistant. is there.

  FIG. 4 is a front view including a partial cross section showing another configuration of the insulating support member according to the second embodiment of the present invention. In the other configuration shown in FIG. 4, a colored layer 40 is formed on a general tension insulator 1. In general, the salt-resistant tensile insulator 1 shown in FIG. 1 has a path (from the distal end portion of the body portion 10a to the distal end portion of the inner cylindrical portion 10d), as compared to the general tensile insulator 1 shown in FIG. It is designed so that the route passing through points A, B, and C in FIG.

  The general tensile insulator 1 shown in FIG. 4 includes the colored layer 40. However, the hollow portion 20 is formed as in the first embodiment shown in FIG. Enclosure designation is also acceptable. Further, the present invention can also be applied to insulators other than tension insulators, such as pins insulators and hanging insulators.

DESCRIPTION OF SYMBOLS 1 Tensile insulator 10 insulator main body 10a trunk | drum 10b head part 10c level | step difference 10d inner cylindrical part 12 cap metal fitting 12a extension piece 12b hole part 14 pin metal fitting 14a connection part 14b hole part 16 cement member 20 hollow part 22 inlet 24 rubber plug 30 Colored member 40 Colored layer 100 Utility pole 110 Electric wire

Claims (4)

An insulating support member disposed between an electric wire and a support that supports the electric wire,
An insulating support member comprising: a hollow portion that encloses a colored liquid inside a portion of the insulating support member body exposed to the outside.   The insulating support member according to claim 1, wherein the liquid is sealed in the hollow portion in a pressurized state. An insulating support member disposed between an electric wire and a support that supports the electric wire,
An insulating support member comprising a water-soluble coloring member inside a portion of the insulating support member body exposed to the outside. The insulating support member body has a rotating body shape,
The insulating support member according to claim 3, wherein the colored member forms a belt-like colored layer that goes around the inside of the main body of the insulating support member.

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