JPH0550658U - Electric wire compression connection tube - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a freeze-breakage-prevention type compression connecting pipe that is free from damage due to freeze-expansion of rainwater and does not require periodic replacement or repair. [Structure] An annular groove 3 is formed on the outer periphery of a compression connecting pipe such as a straight aluminum sleeve 1, and the outer end of a through hole 2 for compound injection is opened at the bottom of this groove 3 and inside this groove. Insert one or more elastic O-rings 4 into 3,
The elastic O-ring 4 closes the opening of the through hole 2. When the water that has entered the inside of the compression connection pipe freezes and expands, the ice spreads the elastic O-ring 4 and swells from the through hole 2 to the outside. Therefore, the compression connecting pipe does not burst. When the ice is thawed, the O-ring 4 is restored to seal the through hole 2 and constantly prevent rainwater from entering.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In order to connect two steel-core aluminum stranded wires, the present invention inserts the steel-core aluminum stranded wires from both sides and then compression-connects a straight aluminum sleeve, or one end of the steel-core aluminum stranded wire to a steel tower or the like. Tubular products that are compression-connected to electric wires, such as strain clamps that are compressed and connected after inserting a steel-core aluminum stranded wire from one end side to stop them, especially when freeze-expansion of rainwater that enters the inside after compression connection It is related to the structure for preventing the destruction of the tubular object.

[0002]

[Prior Art]

 Conventionally, as a compression connecting pipe of an electric wire having a structure for preventing the destruction of tubular objects due to freezing and expansion of rainwater that has penetrated into the inside, for example, Japanese Utility Model Publication No. 63-38541 or Japanese Utility Model Publication No. 61-48659. The ones described in are known. The one disclosed in Japanese Utility Model Publication No. 63-38541 has a non-penetrating long hole with a bottom, which is long in the axial direction and has a thin wall at the bottom, on the outer surface of the compression connecting pipe. The purpose of this is to prevent destruction of the main body of the compression connecting pipe due to freezing and expansion of rainwater. Further, in the one disclosed in Japanese Utility Model Publication No. 61-48659, rainwater is obtained by inserting an aluminum stopper into a through hole for compound injection and plastically deforming the tip end side by compression to seal the through hole. It is designed to prevent the invasion of.

[0003]

[Problems to be solved by the device]

 All of the above-mentioned conventional compression connecting pipes are irrecoverable because at least a part of them is destroyed by freezing and expansion of rainwater, so that there is a problem that they require periodic replacement and repair. Therefore, an object of the present invention is to provide a freeze-breakage-prevention type compression connecting pipe which is free from damage due to freeze-expansion of rainwater and does not require periodic replacement or repair.

[0004]

[Means for Solving the Problems]

 In the present invention, in order to solve the above problems, an annular groove 3 is formed on the outer periphery of a compression connecting pipe such as a straight aluminum sleeve 1, and the outer end of a through hole 2 for compound injection is formed at the bottom of this groove 3. , And one or more elastic rings 4 were fitted into the groove 3 and the opening of the through hole 2 was sealed by this elastic ring 4.

[0005]

[Action]

 In the compression connection pipe of the present invention, when the water that has entered the inside freezes and expands, the ice spreads the elastic ring 4 and expands from the through hole 2 to the outside. Therefore, the compression connecting pipe does not burst. When the ice is thawed, the ring 4 is restored to seal the through hole 2 and prevent rainwater from entering.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view of the compression connecting pipe, and FIG. 2 is an enlarged front view of a part of the compression connecting pipe. In this embodiment, the present invention is applied to a straight aluminum sleeve for connecting two power transmission lines by inserting a steel core aluminum stranded wire from both sides and making compression connection. An aluminum sleeve 1 which is a compression connecting pipe has a hole 2 penetrating in the radial direction at the center thereof. The through hole 2 is for injecting a compound into the inside to prevent intrusion of rainwater. An annular groove 3 having a predetermined width is formed on the outer periphery of the central portion of the aluminum sleeve 1, and the outer end of the through hole 2 is opened at the bottom of the groove 3. Then, a plurality of elastic O-rings 4 are tightly fitted in the groove 3, whereby the through hole 2 is sealed. In this embodiment, when the water that has penetrated into the interior freezes and expands, the elastic O-ring 4 is spread and expanded from the through hole 2 to the outside. Therefore, the aluminum sleeve 1 does not burst. When the ice is thawed, the O-ring 4 is restored to seal the through hole 2 and prevent rainwater from entering. The present invention is not limited to the straight aluminum sleeve 1 and can be applied to any connecting pipe compression-connected to an electric wire. The O-ring 4 may be a single O-ring as long as the through-hole 2 can be sealed at all times, and various kinds of elastic rings can be used instead of the O-ring.

[0007]

[Effect of the device]

 As described above, in the present invention, the annular groove 3 is formed on the outer periphery of the compression connecting pipe such as the straight aluminum sleeve 1, and the outer end of the through hole 2 for compound injection is opened at the bottom of the groove 3. In addition, since one or more elastic rings 4 are fitted in the groove 3 and the opening of the through hole 2 is sealed by this elastic ring 4, the ring 4 always prevents rainwater from entering the inside. If rainwater enters the inside and freezes and expands for some reason, the ring 4 is expanded and the ice swells out from the through hole 2, effectively preventing the compression connecting pipe from rupturing, and periodically It is possible to provide a freeze connection type compression connection pipe that does not require replacement or repair.

[Brief description of drawings]

FIG. 1 is a front view of a compression connecting pipe.

FIG. 2 is an enlarged front view of a part of the compression connecting pipe.

[Explanation of symbols]

 1 Aluminum sleeve 2 Through hole 3 Annular groove 4 O-ring

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koji Miyahara, 6-41, 3-41 Yoshida, Nagano City, Nagano Chuden Appart B-41 (72) Masafumi Yoshida, 6-5-19 Minami-Shinagawa, Shinagawa-ku, Tokyo No. Sanwa Techchi Co., Ltd. (72) Inventor Hiroshi Tajima 6-5-19 Minami-Shinagawa, Shinagawa-ku, Tokyo Sanwa Techchi Co., Ltd. (72) Mitsuo Hamada 5-17 Tsubaki-cho, Nakamura-ku, Aichi Prefecture Sanwa Tech Co., Ltd. Chubu Branch

Claims (1)

[Scope of utility model registration request] 1. A compression connecting pipe which is inserted into a power transmission line and compression-connected to the power transmission line, wherein the non-compressing portion has a radial through hole for injecting a compound therein. An annular groove is formed on the outer circumference so that the outer end opens to the bottom, and one or more elastic rings are fitted into the groove, and the opening of the through hole is sealed by this elastic ring. Characteristic electric wire compression connection tube.