JP5524035B2 - Insulator salt resistance enhancing member - Google Patents

Description

  The present invention relates to a salt-resistant performance-enhancing member for an insulator that can be retrofitted to an insulator that supports an overhead power transmission line to increase the creeping distance and enhance the salt-resistant performance.

Insulators are used as means for supporting overhead power transmission lines on steel towers, or as insulation means in circuit breakers and transformers installed in substations. Mechanical strength is required. For this reason, porcelain, glass, lightweight polymers, and the like are used as insulator materials.
In addition, the structure is designed in advance so that a certain level of insulation performance can be secured even when salt adheres to the outer surface.
Patent Document 1 discloses an insulator device in which a creeping distance is increased and salt resistance is increased by forming a concentric collar portion on the bottom surface of an umbrella-shaped insulator.
In addition, if it is anticipated that salt exceeding the amount assumed at the time of design will be attached due to the influence of typhoons, etc., replace the insulator with one with high salt resistance, and apply a silicone insulating paint on the insulator surface. Or measures such as replacing the circuit breaker or the transformer itself are taken.

However, when replacing insulators and equipment, enormous costs are incurred. When applying insulating paint, the cost of the paint itself is not low, and the paint is cut off after a short period of about 2 years. Since it is necessary to remove and repaint, it is unavoidable that an increase in economic burden is unavoidable when any measure is taken.
There has been a demand for the development of a technique that can improve the salt resistance performance at a low cost by processing an existing insulator by a simple method, but such a technique has not been proposed so far.

JP 2003-31062 A

In the case of conventional insulators, if it is necessary to increase the salt resistance after being installed on a steel tower or equipment, replace with an insulator with high salt resistance, or apply insulating paint, Alternatively, only high-cost measures such as replacing the circuit breaker or the transformer itself could be taken.
The present invention has been made in view of the above, and when it is necessary to increase the salt resistance of an existing insulator, take high-cost measures such as replacing the insulator or equipment or applying an insulating paint. In addition, an object of the present invention is to provide a member for enhancing salt resistance of an insulator that can increase the creeping distance and increase the salt resistance simply by being attached to the insulator after retrofitting.

In order to achieve the above object, a salt resistant performance enhancing member for an insulator according to the invention of claim 1 is a salt resistant performance enhancing member made of an insulating material and bonded to the outer surface of an insulator having an annular bottom surface, A base sheet bonded to at least the annular bottom surface of the insulator; and an annular protrusion protruding from the bottom surface of the base sheet, wherein the base sheet and the protrusion are divided into a plurality of divided pieces. In addition, the protruding portion of each divided piece forms an annular protrusion by bonding the base sheet portion of each divided piece to the annular bottom surface of the insulator.
In the case of improving the salt resistance of existing insulators, conventionally, it was only possible to cope with high costs such as replacing the insulator itself or replacing the device to which the insulator is attached. The salt resistance performance can be increased by increasing the creeping distance by retrofitting the salt resistance performance enhancing member to the insulator. Moreover, since the salt-resistant reinforcement member which consists of a base sheet and a protrusion can be adhere | attached on an insulator in the state divided | segmented into the some division | segmentation piece, the construction in the state mounted in the steel tower or the apparatus is possible. Since the protrusions are fixed to the insulator via the base sheet, the adhesion area increases, and the bonded state can be maintained stably for a long period of time.

According to a second aspect of the present invention, the base sheet is integrated with the bottom surface of the base sheet bonded to the annular bottom surface of the insulator and the outer peripheral edge of the bottom surface of the base sheet, and is bonded to the tapered outer peripheral surface of the insulator. And a folded portion.
Since the base sheet is configured to adhere not only to the bottom surface of the insulator but also to the side surface of the insulator and the tapered outer peripheral surface, the adhesion area can be expanded to further enhance the durability.

The invention according to claim 3 is characterized in that a part of the folded portion of the base sheet contacting the side surface of the insulator is a thick portion.
Due to the presence of the thick wall portion, the outer diameter of the outer peripheral portion of the insulator can be substantially increased to extend the creepage distance.

The invention according to claim 4 is characterized in that a concave portion and a convex portion that are fitted to each other are formed in the facing portion of each of the divided pieces.
By bonding and fixing to the outer surface of the insulator in a state where the concave portion and the convex portion are fitted, the positioning of the divided pieces can be ensured.

According to the present invention, when it is necessary to increase the salt resistance (insulating property) of an existing insulator, insulation can be performed without taking high-cost measures such as replacing the insulator or equipment or applying an insulating paint. By simply attaching it to the insulator as a retrofit, the creepage distance can be increased and the salt resistance can be increased.
Moreover, since the salt-resistant reinforcement member which consists of a base sheet and a protrusion can be adhere | attached on an insulator in the state divided | segmented into the some division | segmentation piece, the construction in the state mounted in the steel tower or the apparatus is possible. Since the protrusions are fixed to the insulator via the base sheet, the adhesion area increases, and the bonded state can be maintained stably for a long period of time.

(A) And (b) is a front view which shows the procedure which attaches the salt tolerance improving member which concerns on the 1st Embodiment of this invention to an insulator apparatus, (c) is the bottom face of the insulator apparatus which attached the salt tolerance enhancing member. FIG. (A) And (b) is the bottom side perspective view of a salt-resistant performance reinforcement member, and an exploded perspective view. (A) And (b) is a front view which shows the procedure which fixes the salt-resistant performance reinforcement | strengthening member which concerns on the 2nd Embodiment of this invention to an insulator. It is a perspective view which shows the external appearance structure of a salt tolerance performance reinforcement | strengthening member. It is principal part structure explanatory drawing of the salt tolerance improving member which concerns on the 3rd Embodiment of this invention. (A) (b) And (c) is the partial perspective view of the salt-resistant performance reinforcement | strengthening member which concerns on the 4th Embodiment of this invention, principal part sectional drawing, and the bottom view of a modification.

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.
1 (a) and 1 (b) are front views showing a procedure for attaching the salt-resistant performance enhancing member according to the first embodiment of the present invention to the insulator device, and (c) is an insulator device attached with the salt-resistant performance enhancing member. FIG. 2 (a) and 2 (b) are a bottom perspective view and an exploded perspective view of the salt resistance enhancing member.

The salt-resistant performance enhancing member 1 is a means for making it possible to increase the creeping distance and reinforce salt resistance by being retrofitted to the individual insulators 51 constituting the insulator device 50.
The insulator device 50 has a structure in which a plurality of insulators 51 made of an insulating material such as porcelain, glass, and lightweight polymer are connected in series.
Each insulator 51 has an umbrella-like front shape, a disk-like planar shape, and an annular bottom surface 52 that is a flat surface.
In addition, although the cross-sectional structure of the illustrated insulator is shown in a simplified manner, the actual insulator is fixed in a recessed portion in which metal fittings connecting the upper and lower insulators are provided in the center portion of the upper surface and the lower surface, respectively. For this reason, the bottom surface 52 of the insulator is annular.

The salt-resistant performance enhancing member 1 is made of a resin material having insulation properties and weather resistance, for example, a polymer, and is fixed to the outer surface of an umbrella-like insulator 51 having a flat annular bottom surface 52 by adhesion. The material of the salt-resistant performance-enhancing member 1 is not necessarily the same as the material of the insulator, and may be a material having an insulation property equal to or higher than that of the insulator.
The salt-resistant performance enhancing member 1 includes an annular base sheet 2 that is bonded to at least the annular bottom surface 52 of the insulator 51, and an annular protrusion (ridge) 10 that protrudes from the bottom surface of the base sheet 2. The number of protrusions may be one, or two or more as illustrated.
In this example, the base sheet 2 has been illustrated as being bonded only to the annular bottom surface 52 of the insulator, but by bending the outer peripheral edge of the base sheet upward and extending to the side surface 53 of the insulator, The adhesion area may be increased.
The salt-resistant performance-enhancing member 1 is composed of two divided pieces 1A and 1B for bonding and fixing not only to the insulator 51 located at the lowermost part but also to the outer surfaces of all other insulators. By attaching the base sheet portions 2A, 2B of the divided pieces to the annular bottom surface 52 of the insulator with an insulating adhesive, the annular protrusions 10A, 10B of the divided pieces are continuous. Is formed.
By adhering the upper surface of the base sheet 2 having a large area to the annular bottom surface 52 of the insulator as described above, the annular protrusion 10 is integrally formed on the annular bottom surface 52 of the insulator while ensuring strong adhesive strength. It is possible to increase the distance and improve the salt resistance.

Next, FIGS. 3A and 3B are front views showing a procedure for fixing the salt-resistant performance enhancing member according to the second embodiment of the present invention to the insulator, and FIG. 4 shows the salt-resistant performance enhancing member. It is a perspective view which shows an external appearance structure.
The salt-resistant performance-enhancing member 1 according to this embodiment is configured to protrude from the annular bottom surface 52, the side surface 53, the substantially bag-shaped base sheet 2 bonded to the tapered outer peripheral surface 54, and the bottom surface of the base sheet 2. And an annular protrusion (protrusion portion = ridge portion) 10 provided.
The base sheet 2 is integrated with an annular base sheet bottom surface 3 that is bonded to an annular bottom surface 52 of the insulator, an outer peripheral edge of the base sheet bottom surface 3, and a side surface 53 of the insulator and / or a tapered outer peripheral surface 54. And a folded portion 4 to be bonded.
The protrusion 10 is an annular protrusion integrated with the base sheet bottom surface 2.
The salt-resistant performance enhancing member 1 is composed of two divided pieces 1A and 1B. The base sheet portions 2A and 2B of each divided piece are insulated from the annular bottom surface 52, the side surface 53, and the tapered outer peripheral surface 54 of the insulator. By adhering with an adhesive having the above, the protruding portions 10A and 10B of each divided piece are formed to form a continuous annular protrusion 10.

In this way, the base sheet 2 that covers not only the annular bottom surface 52 of the insulator but also the side surface 53 and the tapered outer peripheral surface 54 is bonded and fixed to the outer surface of the insulator, thereby ensuring strong adhesive strength and ensuring the strength of the insulator. The creeping distance can be increased by integrally forming the annular protrusion 10 on the annular bottom surface 52.
The base sheet may be configured to cover the annular bottom surface 52 and the side surface 53.

Next, FIG. 5 is an explanatory view of the main part configuration of the salt-resistant performance enhancing member according to the third embodiment of the present invention.
In the salt-resistant performance enhancing member 1, the outer peripheral portion (a part of the folded portion 4) of the base sheet 2 in contact with the side surface 53 of the insulator is the thick portion 5. For this reason, the outer diameter of the insulator can be substantially enlarged to increase the creepage distance.
When the distance between the insulators 51 connected in series is too small to increase the protrusion amount of the protrusion 10 (when the protrusion 10 cannot be provided), the base sheet 2 having the thick portion 5 is attached. The creepage distance can be increased by using and increasing the outer diameter of the insulator.
That is, the protrusion 10 may be provided side by side, or the creeping distance may be secured by providing the thick portion 5 instead of the protrusion.

Next, FIGS. 6A, 6 </ b> B, and 6 </ b> C are a partial perspective view, a cross-sectional view of a main part, and a bottom view of a modified example of the salt-resistant performance enhancing member according to the fourth embodiment of the present invention.
The salt-resistant performance-enhancing member 1 is characterized in that a concave portion and a convex portion that are fitted to each other are formed at opposing portions (joining portions) between the divided pieces 1A and 1B.
6 (a) and 6 (b) show that the concave portions 11 and the convex portions 12 are respectively formed on the end surfaces of the projecting portions 10A and 10B constituting the respective divided pieces 1A and 1B, and the other is in the concave portion 11 provided in one of the divided pieces. By fitting the convex portions 12 provided on the divided pieces, the positioning accuracy of each other is increased. For this reason, one salt-resistant performance reinforcement member can be comprised by uniting two division pieces, without producing position shift.

Further, in the modified example of FIG. 6C, the recesses 13 and the protrusions 14 that are fitted to each other are formed on the opposing edges of the base sheet portions 2A and 2B, not the protrusions, and the recesses provided on one divided piece. By fitting the convex portion 14 provided on the other divided piece into the inside 13, the positioning accuracy of each other is increased. For this reason, one salt-resistant performance reinforcement member can be comprised by uniting two division pieces, without producing position shift.
In addition, the structure for positioning which consists of a recessed part and a convex part is applicable also to the salt-resistant performance reinforcement | strengthening member which concerns on embodiment of FIG.
In each of the above embodiments, the annular bottom surface of the insulator is shown as a flat surface orthogonal to the axial direction of the insulator, but a flat tapered surface or a curved surface that is inclined from the inner diameter side toward the outer diameter side. It may be. In this case, it is needless to say that the base sheet 2 is configured so that the shape of the base sheet 2 is aligned and in close contact with the annular bottom surface 52.
The salt-resistant performance-enhancing member of the present invention can secure durability for about 6 to 12 years by bonding and fixing to an insulator using an adhesive having sufficient adhesive strength and weather resistance. have. In addition, since there is no need to process the insulator, the workability is excellent.

DESCRIPTION OF SYMBOLS 1 ... Salt resistance performance reinforcement | strengthening member, 1A, 1B ... Divided piece, 2 ... Base sheet, 3 ... Base sheet bottom face, 2A, 2B ... Base sheet part, 5 ... Thick part, 10 ... Protrusion, 10A, 10B ... Protrusion part, DESCRIPTION OF SYMBOLS 11 ... Concave part, 12 ... Convex part, 13 ... Concave part, 14 ... Convex part, 50 ... Insulator device, 51 ... Insulator, 52 ... Annular bottom surface, 53 ... Side surface, 54 ... Tapered outer peripheral surface

Claims (4)

A salt-resistant performance-enhancing member made of an insulating material and bonded to the outer surface of an insulator having an annular bottom surface,
A base sheet bonded to at least the annular bottom surface of the insulator, and an annular protrusion projecting from the bottom surface of the base sheet,
The base sheet and the protruding portion are divided into a plurality of divided pieces, and the protruding portion of each divided piece is formed into an annular protrusion by bonding the base sheet portion of each divided piece to the annular bottom surface of the insulator. A member for enhancing salt resistance performance of an insulator, characterized by being formed.   The base sheet includes a base sheet bottom surface that is bonded to an annular bottom surface of the insulator, and a folded portion that is integrated with an outer peripheral edge of the base sheet bottom surface and bonded to the tapered outer peripheral surface of the insulator. The member for enhancing salt resistance of an insulator according to claim 1, wherein   3. The salt resistant performance-enhancing member for an insulator according to claim 2, wherein a part of the folded portion of the base sheet that contacts the side surface of the insulator is a thick portion. Wherein the opposing portions between the divided pieces, the insulator of the salt performance enhancing member according to claim 1, 2 or 3, characterized in that it is formed concave portions and convex portions to be fitted to each other.

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