JPH0714519U - Insulator protection device - Google Patents

Abstract

(57) [Abstract] [Purpose] The mounting member 11 including the discharge electrode 10 facing the ground-side base metal fitting 3 with a gap G is prevented from sliding down or tilting due to the weight of snow caused by snow cover.
The attachment member 11 is attached to the body portion 2c of the insulator body 2. [Structure] A band tightening system is adopted in which a mounting member 11 having a discharge electrode 10 can be tightened and mounted to a body portion 2c of an insulator 2. Support holder 8 fitted on the head 2a of the insulator body 2
The ground side lead portion 22 of the current limiting element unit 9 fixed to the above is connected to the mounting member 11. The support holder 8 and the mounting member 11 are located substantially opposite to the ground side lead portion 22.
And are connected by the connection support member 23.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved insulator protection device for protecting an insulated wire of a high-voltage distribution line and an insulator from a continuous arc caused by an abnormal voltage such as a lightning surge.

[0002]

[Prior art]

 Insulator protection devices are attached to the wire support devices of high-voltage power distribution lines to protect insulated wires and insulators from follow-up arcs.

The ring-shaped discharge electrode of this insulator protection device is internally mounted in an annular mounting member made of an insulating member fitted to the outer peripheral surface of the insulator body, and the discharge electrode faces the ground-side base metal fitting. In this way, the mounting member is fitted to the outer surface of the insulator, and the discharge electrode discharges the base metal through the gap.

[0004]

[Problems to be solved by the device]

 In the above-mentioned conventional protection device, when the insulator protection device is used in a snowfall area, the ring-shaped mounting member is covered with snow (snow) and the weight of the snow causes the ring-shaped mounting member to slide down. And the ring-shaped discharge electrode fixed to the same member also tilts. Therefore, there is a problem that the discharge gap length between the discharge electrode and the base metal is changed or becomes non-uniform, and stable discharge characteristics cannot be obtained.

Therefore, an object of the present invention is to provide an insulator protection device that prevents such inclination of the discharge electrode and solves the above problems.

[0006]

[Means for Solving the Problems]

 SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a support holder (8) removably fitted to an upper surface (2b) of a head (2a) of an insulator (2), and a body of the insulator (2). The ring-shaped mounting member (11) wound around the outer peripheral surface (2c ') of the portion (2c), the current limiting element unit (9) provided in the support holder (8), and the mounting member ( 11) is provided with a ring-shaped discharge electrode (10), and the charging side lead portion (15) of the current limiting element unit (9) is electrically connected to the insulated wire (5) through the connector (12). In which the ground-side lead portion (22) is connected to the discharge electrode (10) by using the mounting member (11) as a support member, the ring-shaped mounting member (11) is connected to the insulator (2). ) The body is tightened to the body part (2c), and the band tightening method is used. In generally opposite that over de section (22) is arranged, it is characterized in that the support holder (8) and the mounting member (11) and connected by a connecting support member (23).

[0007]

[Action]

 Since the mounting member (11) can be tightened and fixed to the body portion (2c) of the insulator body (2) by a band method, even if the outer diameter of the body portion (2c) of the insulator body (2) is different, the mounting member (11 ) Can be fixed easily and with a strong tightening force.

Further, the mounting member (11) is supported at two places by the grounding side lead portion (22) and the connecting support member (23) provided at positions substantially opposite to each other, so that this mounting member (11) At the time of mounting, the mounting member (11) can be fixedly fixed at a predetermined position and in a predetermined posture. In addition, even if the mounting member (11) is snowed (snowed) in a snowfall area, the mounting member (11) is supported at two substantially opposed positions as described above, and therefore the mounting member (11) is supported. It is possible to surely prevent (11) from sliding down and leaning under the weight of snow.

Therefore, the discharge gap (G) formed between the link-shaped discharge electrode (10) fixed to the mounting member (11) and the ground-side base metal fitting (3) is set at the time of mounting and after mounting. Can always be set to the best and still maintain it.

[0010]

Embodiments Embodiments of the present invention will be specifically described below with reference to FIGS. 1 to 12. Reference numeral 1 denotes an insulated wire supporting device, which is attached to a arm 4 through a ground side base metal fitting 3 fixed to a lower part of an insulator body 2, and an insulated wire 5 is bound or wound around an upper head 2a. It is bound by the attached grip 6.

Reference numeral 7 denotes an insulator protection device, which is a support holder 8 made of synthetic resin detachably mounted on the upper surface of the head 2 a of the insulator body 2, and detachably fitted to the holder 8. The attached current limiting element unit 9 and a band tightening type mounting member 11 made of rubber or synthetic resin for concentrically disposing the discharge electrode 10 on the outer peripheral surface 2c 'of the body 2c of the insulator 2. It is composed of a ring-shaped discharge electrode 10 fixed to the mounting member 11 and a connector 12 for connecting to an insulated wire.

In the above description, the support holder 8 is particularly formed as shown in FIG. 7 to FIG. 9, and the adhered portion 8a thereof is detachably attached to the head portion 2a of the insulator body 2, and the support portion of the upper portion is further supported. The current limiting element unit 9 is formed to be detachably fitted to the holding portion 8b. Reference numeral 8c is a locking portion for positioning provided on the support portion 8b, 8d is a hooking portion formed on the adhered portion 8a, 8e is a drain hole penetrating the support portion 8b and the adhered portion 8a, and 8f is an elastic member. For the purpose of revealing, a split groove portion is formed through the partition wall with the adhered portion 8a, and 8g indicates a screw portion for inserting a screw for connecting a support member.

The current limiting element unit 9 includes a current limiting element 13 having excellent voltage non-linearity as shown in FIG. 10, a charging side lead portion 15 connected to a charging side electrode 14 of the element, and an element. The ground-side lead portion 22 connected to the ground-side electrode 16 and the rubber member 17 covering the outer peripheral surfaces thereof. In the figure, 18 is a connecting screw, 19 is a crimping terminal, 20 is a reinforcing spacer disposed so as to surround the protruding connecting portions 14a and 16a of the ground side electrode and the charging side electrode, and 21 is a primary molding member such as synthetic resin. Show.

The mounting member 11 is ring-shaped and has a band tightening method, and is mounted by being tightened to the outer peripheral surface of the body 2c of the insulator body 2, and is made of rubber such as EP or EPDM. . A deep groove 11a having an opening on the lower surface side is formed in the mounting member 11, and a ring-shaped discharge electrode 10 connected to the ground side lead portion 22 of the current limiting element unit 9 is fixedly provided in the deep groove 11a. . The discharge electrode 10 is attached to the outer peripheral surface 2c 'of the body portion 2c of the insulator body 2 in a predetermined manner between the discharge electrode 10 and the ground-side base metal fitting 3 at the bottom of the insulator body as shown in FIG. To form the discharge gap G of.

In FIG. 11 and FIG. 12, 11b is a positioning projection, which is integrally formed with the mounting member 11 at a plurality of intervals in the circumferential direction of the mounting member 11 and whose inner surface is the upper part. Is formed on the taper surface 11b 'protruding inward. Reference numeral 11c is a connection hole formed in one predetermined protrusion 11b.

Reference numeral 23 denotes a connection support member. As shown in FIG. 4, one end 23a is connected to the screw portion 8g of the support holder 8 and the other end 23b is inserted into the connection hole 11c of the mounting member 11 to support the support holder. 8 and the mounting member 11 are connected to each other, and are provided at a position substantially facing the ground side lead portion 22.

FIG. 12 shows the details of the tightening portion 11f of the band-type mounting member 11. The end face 11A of the end-shaped mounting member 11 has a saw blade-shaped hooking surface 11h. A stopper portion 11g is provided, and a hooking hole 11i is formed on the other end side 11B opposite to the stopper portion 11g. When tightening, the hooking portion 11g is inserted into the hooking hole 11i, and is further pushed fully so that the insulator 2 Tighten it to the body part 2c.

Reference numeral 12 is a connector provided at the tip of the charging side lead portion 15 for electrically connecting the lead portion 15 to the insulated electric wire 5, and the lead portion 15 is provided with a screw 2 It is connected to the main body metal fitting 26 by means of 4, 25. The connector is provided with a main body metal fitting 26, an electric wire support member 27 provided on the upper side of the main body metal fitting 26, a coating cutting portion 28 and a compound 29 in which a tip of the electric wire support member 27 is slightly protruded downward from the support member 27. Further, the lower side is provided with a needle electrode 30, a washer 31, a tightening bolt 32, and a torque management member 33. Reference numeral 34 indicates a connector cover.

To mount the protective device, the support holder 8 is fitted to the head 2 a of the insulator body 2 with the band-type mounting member 11 opened. Next, the mounting member 11 is wound around the body 2c of the insulator body 2, and the hooking portion 11g on the one end side 11A is inserted into the hooking hole 11i on the other end side B, and is pushed further to the full. As a result, the retaining surface 11h is retained in the retaining hole 11i, and the mounting member 11 is clamped and held by the body portion 2c of the insulator body 2.

Then, the connector 12 provided on the charging side lead portion 15 is connected to the core wire of the insulated electric wire 5 by the needle electrode 30. Next, the operation of the protection device of the above embodiment will be described.

If a lightning surge enters the distribution line and a flashover occurs in the discharge gap (G) between the discharge electrode 10 and the base metal fitting 3, the surge is the core wire of the insulated wire 5-connector-12. -Charging side lead part 15-Charging side electrode 14-Current limiting element 13-Grounding side electrode 16-Grounding side lead part 22-Discharging side electrode 10-Discharging gap G-Base metal fitting 3 or arm It is quickly discharged to the earth (ground) through the discharge path of 4. In this case, since the current limiting element 13 is interposed in series in the above path, the lightning surge passes through the element and the follower arc is interrupted. Therefore, the breakage accident of the insulated wire due to the follower arc or the insulator Destruction accidents are prevented in advance. The above operation is the case where a positive (plus) lightning surge is applied to the insulated wire 5. However, when the polarity of the lightning surge is negative (minus), it passes through the same discharge path as above and the positive The discharge current will flow in the opposite direction.

[0022]

[Effect of device]

 As described above, according to the present invention, the ring-shaped mounting member having the discharge electrode can be reliably supported at the predetermined position and the predetermined posture with respect to the body of the insulator body, especially when the mounting member is covered with snow. Also in this case, the mounting member can be prevented from sliding down and its predetermined position and posture can be maintained.

Therefore, the discharge gap length formed between the ring-shaped discharge electrode provided on the mounting member and the ground-side base metal fitting can be constantly maintained at a predetermined value, and stable discharge characteristics can be obtained.

[Brief description of drawings]

FIG. 1 is a mounting state diagram of a protective device showing an embodiment of the present invention.

FIG. 2 is a right side view of FIG.

FIG. 3 is a plan view of FIG.

FIG. 4 is a mounting state diagram of a connecting support member in which a support holder and a mounting member are connected to each other.

FIG. 5 is a side view of the connector.

6 is a front view of FIG.

FIG. 7 is a front view of a support holder.

FIG. 8 is a bottom view of FIG.

9 is a cross-sectional view taken along the line AA of FIG.

FIG. 10 is a vertical sectional view of a current limiting element unit.

FIG. 11 is a partially cutaway view showing the assembled state of the current limiting element unit and the mounting member.

FIG. 12 is a partially cutaway plan view of a mounting member.

[Explanation of symbols]

 2 Insulator 2a Head 2b Upper surface 2c Body 2c 'Outer peripheral surface 8 Support holder 9 Current limiting device unit 10 Discharge electrode 11 Mounting member 22 Grounding side lead 23 Connection support member

Claims (1)

[Scope of utility model registration request] 1. An upper surface (2) of a head (2a) of an insulator (2).
a support holder (8) removably fitted to b), a ring-shaped mounting member (11) wound around the outer peripheral surface (2c ') of the body (2c) of the insulator body (2), A current limiting element unit (9) provided on the support holder (8) and a ring-shaped discharge electrode (1) provided on the mounting member (11).
0), the charging side lead part (15) of the current limiting element unit (9) is electrically connected to the insulated wire (5) through the connector (12), and the ground side lead part (22) is Using the mounting member (11) as a support member, the discharge electrode (1
0) connected to the body (2c) of the insulator (2) by a band-tightening system in which the ring-shaped mounting member (11) is tightened and mounted. 22. An insulator protection device, characterized in that the support holder (8) and the attachment member (11) are connected by a connection support member (23) substantially on the side opposite to the side where 22) is arranged.