JP3996590B2 - Arrester cover - Google Patents

Description

  The present invention relates to a lightning arrester cover for waterproof protection of a lightning arrester and a connector connected to the top of the lightning arrester in a high voltage overhead distribution line.

  In each measure against the waterproofing, salt damage, insulation and contact with other objects of the lightning arrester for the distribution line, the entire outer shell part of the lightning arrester is formed of a material having both waterproofness and insulation, and further, the electrode of the arrester On the upper side, the mainstream was to attach a cover made of synthetic resin to prevent contact of nesting and other objects to the lightning arrester. However, it is necessary to provide a hole for the connector cable connected to the top of the lightning arrester at the top of the cover, and rainwater or salt water is infiltrated from this hole, and the electrode in the lightning arrester wets along with this. When an object touched, the leakage current of the electrode increased, causing a power failure.

In addition, if the cover does not correspond to the size and shape of the lightning arrester at the time of installation, there is a risk of hindering the normal operation of the lightning arrester.
Japanese Laid-Open Patent Publication No. 6-204209 (first page, FIG. 1) No. 7-3538 (1st page, Fig. 1)

  Therefore, in view of the conventional drawbacks, the cover is currently shifting to a cover that covers both the lightning arrester and the connector. Measures can be taken, for example, by using a product that is integrally provided with the cover. However, in such a case where the connection portion between the lightning arrester and the connector is also waterproof protected, after the connection between the lightning arrester and the connector, Something that made it possible to attach and detach was necessary. This cover is formed by splitting each cover component part of bilaterally symmetrical shape so that it can be opened and closed via a connecting part, and when used, an operator directly fits the parts to each other, both a lightning arrester and a connector. It was intended to be put on. However, even when the cover is mounted across the lightning arrester and the connector, the flooding from the connector cable extraction hole is not prevented, and various problems such as the above-described salt damage and loss of insulation due to the flooding of the electrodes are still not yet possible. It remained unsolved.

  The present invention has been invented in view of the above problems, and insulates both the lightning arrester and the connector and, in addition, performs contact with other objects and waterproof protection, as well as flooding the lightning arrester electrode from the cable outlet. It is intended to provide a lightning arrester cover that can prevent long-term stable operation by preventing abnormal operation.

The invention according to claim 1 of the present invention is a lightning arrester cover that covers a lightning arrester and a connector with a cable connected to the upper part of the lightning arrester, and the cover body opens and closes left and right via the connecting part. Consists of two parts, each part has a lightning arrester and connector housing space, and a joint space arranged so as to cover the upper and side surfaces of the housing space. Yes apart by, and even more the time of closure of each part, at a position disposed in arrester and the connector upper side of the partition to form an extraction hole of the cable, the position of the upper side of at least extraction hole of the joint space Is characterized in that each part is provided with a waterproof material that adheres integrally when each part is closed.

  Here, left and right are directions based on a lightning arrester attached to the housing. Moreover, as a material of each part, the thing which has the flame retardance which does not burn at the time of a thunderbolt as well as insulation is selected, and a polyethylene-type reinforced resin etc. are mentioned specifically ,. In addition, it is necessary to select a material that has both insulating properties and flame retardancy in the waterproof material as well as the cover, but it also has a viscosity that adheres in a state that does not create a gap when each part is closed. Specific conditions include butyl rubber and the like. Furthermore, the waterproofing material only needs to be prepared so as to block the extraction hole, but the waterproofing material should be arranged along the side surface of each part, that is, the joint part of each part as well as the extraction hole. Is desirable. Moreover, the connection part should just be what can open and close each part without inconvenience, and specifically, the strip | belt-shaped body integrally formed with each part, a hinge, etc. are mentioned. In addition, the waterproof material is divided and arranged in each part in order to allow the cable to enter the extraction hole without hindrance, and the waterproof material satisfies the condition that the extraction hole is blocked, and either When only these parts are provided, the distance that the cable enters to the position of the extraction hole against the viscosity of the waterproof material increases when each part is closed. As a result, each part cannot be closed when this cover is installed. Inconvenience arises.

  When this cover formed in this way is attached to a lightning arrester and a connector, the waterproof materials arranged in each part adhere to each other, and the waterproof material adheres tightly to the cable surface of the connector, and above the extraction hole. A waterproof material is put on the cover, which can prevent water from entering the lightning arrester electrode from the outside of the cover.

  In the invention according to claim 2 of the present invention, since the gripped portion by the indirect live wire gripping tool is provided on the outer surface side of the part provided with the waterproof material in each part, the indirect live wire gripping tool is operated. By gripping the gripped part many times, the waterproofing material in each part is strongly pressed inward, and the adhesive part between the waterproofing material becomes familiar, so the waterproofing material is integrated in a tighter state Turn into. Thereby, it becomes possible to attach the cover to the installed lightning arrester without causing a power failure even in rainy weather.

  Here, the gripped portion only needs to have a shape suitable for sandwiching each part by an indirect live wire gripping tool, specifically a flat surface, and more preferably, an action portion of the indirect live wire gripping tool. What is necessary is just to form in the uneven surface which agree | coincides with a meshing surface.

According to the first aspect of the present invention, the joining space is arranged through the partition so as to cover the upper side and the side surface of the lightning arrester and the housing space of the connector, and the joining space is filled with the waterproof material. Since the waterproof material adheres tightly between the cable and the cable and the extraction hole without any gaps, it is possible to reliably prevent water from entering the cover from the cable extraction hole extending from the connector. The main purpose of attaching this cover is to prevent contact with other objects and to ensure insulation, as well as to prevent damage such as salt damage due to prevention of the above-mentioned flooding. Since it is reliably prevented, long-term normal operation of the lightning arrester can be expected. Further, according to the invention described in claim 2, the adhesive state between the waterproof materials arranged in each part becomes tighter, and it is possible to more reliably prevent water from entering the cover.

Next, an embodiment of the lightning arrester cover of the present invention will be described below.
As shown in FIGS. 1 and 2, the lightning arrester cover is composed of two parts 1a and 1b having a symmetrical shape that opens and closes to the left and right via a connecting band 2. Each of the parts 1a and 1b is made of a polyethylene flame retardant. It can be obtained by injection molding a functional resin. And about the internal structure of each part 1a, 1b, the storage space S of the lightning arrester 4 and the connector 5 which arrange | positioned the connector holding piece 12 in multiple places radially on the inner peripheral surface, and the upper side and side surface of this storage space S are covered. The joint space R is filled with putty materials 3a and 3b mainly composed of butyl rubber having strong viscosity.

The cover will be described in more detail. When the parts 1a and 1b are closed when the cover is attached to the lightning arrester 4 and the connector 5, the upper stage, the interruption, and the lower stage at the edge on the side away from the connection band 2 side. Are provided with overhanging pieces 7, 7, 7 having a meshing surface with the indirect live wire gripping tool 16 on the outer surface side, and on the opposite side of each overhanging piece 7, 7, 7, Each has a huge portion 9 and a receiving hole 10. Then, by operating the indirect live wire gripping tool 16 and sequentially grasping the outer surface side of each of the projecting pieces 7, 7, 7, the enormous portion 9 and the receiving hole 10 are snapped into each other, and each part 1a , 1b are attached to the lightning arrester 4 and the connector 5 in a state in which they cannot be pulled out upward. Further, the housing space S and the joint space R of the lightning arrester 4 are separated by a partition 18, and further, at the upper center position of the partition 18, an extraction hole 8 of the cable 6 extending upward from the connector 5. Is provided.
Reference numeral 17 denotes an insertion piece. The insertion piece 17 positions and holds the putty materials 3a and 3b on the upper side of the extraction holes 8 in the parts 1a and 1b, and closes the parts 1a and 1b. At this time, the putty material 3a, 3b filled in the joining space R of the parts 1a, 1b on the side where the insertion piece 17 is not provided is inserted into the part 1a, 1b, thereby achieving the purpose of improving the sealing performance between the parts 1a, 1b.

  When the main cover having the above-described configuration is actually attached to the lightning arrester 4, the putty materials 3a and 3b filled in the joining space R adhere to each other at the adhesion portion L as shown in FIG. In addition to being in close contact with the circumference, the extraction hole 8 of the cable 6 is completely sealed, thereby preventing water from entering from the upper side of the cover.

Next, an actual attachment procedure of the lightning arrester cover having the above-described structure will be described in order based on each drawing.
In the present embodiment, a configuration in which the lower end side of the cover is cut off by the cut line 14 is used.
First, as shown in FIG. 4A, the fin 11 provided on one of the parts 1a and 1b is gripped by the indirect hot wire gripping tool 16, and the cover is brought closer to the lightning arrester 4 to which the connector 5 is connected. Next, as shown in FIG. 4B, the connector holding pieces 12 in the housing spaces S of the parts 1 a and 1 b are aligned with the position of the connector 5, and the cable 6 of the connector 5 is aligned with the extraction hole 8. After the position adjustment, the connector 5 is fitted into each connector holding piece 12. Next, as shown in FIG. 4 (c), the protruding pieces 7, 7, 7 of the parts 1a, 1b are gripped by the indirect live wire gripping tool 16, and the enormous portions 9 of the protruding pieces 7, 7, 7 are The receiving holes 10 are fitted into the respective parts 1a and 1b so that the parts 1a and 1b are not opened. Finally, as shown in FIG. 4 (d), the gripped surfaces 13 and 13 of the parts 1a and 1b are gripped several times by the indirect hot wire gripping tool 16 from the outside of the cover, and putty materials for both the parts 1a and 1b are obtained. 3a and 3b are adhered and integrated to complete the mounting operation.

  In addition to the purpose of adjusting the protection range by the main cover in accordance with the standard of the lightning arrester 4 by cutting the lower end side portion through the cutoff line 14 from the main cover, the cutoff line 14 has a lower end edge of the main cover. The purpose of keeping the distance between the lightning arrester 4 and the support bracket (not shown) at an appropriate distance is also achieved. If the distance between the lower edge of the main cover and the support bracket of the lightning arrester 4 is extremely close, during lightning strike, the normal operation of the lightning arrester 4 is obstructed, that is, the lightning arrester 4 does not pass through the peripheral wall of the main cover. There is a possibility that current may be applied to the support bracket side, which may cause inconveniences such as failure of distribution line equipment and power failure.

It is a side view which shows the use condition of the cover for lightning arresters by this invention. It is the side view which expand | deployed the cover for lightning arresters by this invention from the state of the said FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. (A) (b) (c) (d) is explanatory drawing which shows the attachment procedure of the cover for lightning arresters of this invention.

Explanation of symbols

1a, 1b Parts 2 Connection band (connection part)
3a, 3b Putty material (waterproof material)
4 Lightning Arrester 5 Connector 6 Cable 8 Extraction Hole 13 Grip Surface (Grip Part)
16 Indirect hot wire gripper
18 Partition L Adhesive point S Storage space R Joint space

Claims (2)

A lightning arrester cover that covers the lightning arrester and a connector with a cable connected to the top of the lightning arrester,
The cover body is composed of two parts (1a, 1b) that open and close left and right via the connecting part (2).
Inside each part (1a, 1b), there is a housing space (S) for the lightning arrester (4) and the connector (5), and a joint space (R) arranged to cover the upper and side surfaces of the housing space (S). The housing space (S) and the joint space (R) are separated by a partition (18), and when the parts (1a, 1b) are closed, the lightning arrester (4) in the partition (18 ) and In the place arranged on the upper side of the connector (5), an extraction hole (8) of the cable (6) is formed,
A waterproof material (3a, 3b) that adheres integrally when the parts (1a, 1b) are closed is placed at least on the upper side of the extraction hole (8) of the joining space (R). (1a, 1b) A lightning arrester cover characterized by being provided. A part to be gripped (13) by an indirect live wire gripping tool (16) is provided on the outer surface side of the part (1a, 1b) provided with the waterproof material (3a, 3b). The lightning arrester cover according to claim 1.