CN218070962U - Bolt type wedge-shaped strain clamp - Google Patents

Abstract

The utility model relates to a strain clamp technical field especially relates to a bolt formula wedge strain clamp, including fastener body, fastener inner wedge, U type bolt, this internal mounting groove that is used for holding the stranded conductor that is equipped with of fastener, the first end of fastener inner wedge is located in the mounting groove, the first end of fastener inner wedge is used for closely cooperating with the stranded conductor, U type bolt with the second end of fastener inner wedge is connected. The utility model discloses a self-locking effect cooperation of less U type bolt and fastener inner wedge reaches the grip value of the required pair strand wires of product, and product application scope is wide, and simple to operate and convenient to overhaul and change have obviously to improve in the aspect of protecting the wire, have improved the life of stranded conductor.

Description

Bolt type wedge-shaped strain clamp

Technical Field

The utility model relates to a strain clamp technical field especially relates to a bolt formula wedge strain clamp.

Background

At present, a tension clamp is generally used for fixing and tensioning a ground wire on a tension tower of an overhead transmission, transformation and distribution device. The strain clamp mainly comprises a compression type strain clamp, a bolt type strain clamp, a wedge type strain clamp and a pre-twisted type strain clamp. The bolt type strain clamp is characterized in that a pressing block and a clamp body pressing groove are acted on a stranded wire to compress the stranded wire by using vertical pressure generated after the U-shaped bolt is fastened, so that friction force is generated between the stranded wire and the clamp to prevent the stranded wire from moving relatively, and U-shaped bolts with different groups are configured according to different diameters and rated tensile strengths of the ground wire to achieve a specified holding force value. The wedge type strain clamp is characterized in that a special wedge type structure is utilized to lock a stranded wire in the clamp under the action of the self tension of the stranded wire so that the stranded wire cannot slide, and the wedge type strain clamp is simple in structure and is generally used for more steel stranded wires.

When the bolt type strain clamp is used for fastening a lead, the holding force value of the lead is required to be more than 90% of the rated breaking force of the lead, and the friction force generated by the pressing force provided by the U-shaped bolt is unstable. When the diameter of the stranded wire is increased, in order to achieve a holding force value, the number of the U-shaped bolts needs to be increased, and sometimes 5 or more groups of the U-shaped bolts are needed to provide enough holding force, so that the manufacturing difficulty of the product is greatly increased, and the cost is greatly increased; when the diameter of the stranded wire is very small, the diameter of some steel stranded wires in the engineering is less than one centimeter, the pressure conversion friction force becomes difficult due to the limitation of the structure, the sliding risk is greatly increased, frequent inspection and maintenance are required, and the operation and maintenance cost is increased. When a wedge-shaped strain clamp is used for installing a lead, the stranded wire needs to be folded back by 180 degrees along the clamping groove, so that the clamp is generally only used for the steel stranded wire with small diameter and convenient bending, has small application range and is only used when the ground wire and a tower fix the stay wire.

In conclusion, the strain clamp in the prior art is difficult to achieve the grip strength value of the twisted wire required by the product, and the applicable range of the twisted wire is small.

SUMMERY OF THE UTILITY MODEL

The utility model provides a bolt formula wedge strain clamp to solve strain clamp and be difficult to reach the required grip value to the stranded conductor of product, and be suitable for the little technical problem of stranded conductor scope.

In order to solve the technical problem, the utility model provides a bolt formula wedge strain clamp, including fastener body, fastener inner wedge, U type bolt, this internal mounting groove that is used for holding the stranded conductor that is equipped with of fastener, the first end of fastener inner wedge is located in the mounting groove, the first end of fastener inner wedge is used for closely cooperating with the stranded conductor, U type bolt with the second end of fastener inner wedge is connected.

Preferably, one end, far away from the cable clamp inner wedge, of the U-shaped bolt is connected with a gland, and the gland is used for being abutted to a stranded wire.

Preferably, this internal locking piece that is equipped with of fastener, the locking piece with the cooperation of fastener body forms the mounting groove.

Preferably, the outside of the wire clamp body is provided with a wire clamp casing and a hanging plate, and the wire clamp casing, the hanging plate, the wire clamp body and the locking block are fixedly connected through a bolt.

Preferably, the second end of the inner wedge of the wire clamp and one side of the gland close to the stranded wire are both provided with a wavy wire groove.

Preferably, the curvature radius of the mounting groove is 8 times or more than 8 times of the diameter of the stranded wire.

Preferably, the inner wall of the mounting groove is a smooth inner wall.

Preferably, the U-shaped bolts are provided in two.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model provides a bolt formula wedge strain clamp, it includes fastener body, fastener inner wedge, U type bolt, this internal mounting groove that is used for holding the stranded conductor that is equipped with of fastener, the first end of fastener inner wedge is located in the mounting groove, the first end of fastener inner wedge is used for closely cooperating with the stranded conductor, U type bolt with the second end of fastener inner wedge is connected. The utility model discloses combined the structural feature of bolt type strain clamp and wedge type strain clamp, through setting up fastener inner wedge and less U type bolt, realized the auto-lock effect of stranded conductor, can reach the required grip value to the stranded conductor of product, application scope is wide simultaneously, simple to operate, convenient to overhaul and change.

Drawings

Fig. 1 is a schematic structural view of a bolt-type wedge strain clamp provided by an embodiment of the present invention.

Wherein the reference numbers are as follows: 1. a wire clamp body; 11. mounting grooves; 12. a locking block; 2. wedging in the wire clamp; 3. a U-shaped bolt; 4. a gland; 5. a wire clamp casing; 6. hanging plates; 7. and (5) stranding.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, the embodiment of the utility model provides a bolt formula wedge strain clamp, including fastener body 1, fastener inner wedge 2, U type bolt 3, this internal mounting groove 11 that is used for holding stranded conductor 7 that is equipped with of fastener, the first end of fastener inner wedge 2 is located in fastener body 1, the first end of fastener inner wedge 2 is used for closely cooperating with stranded conductor 7, U type bolt 3 with the second end of fastener inner wedge 2 is connected. Wherein, the first end of fastener inner wedge 2 is the awl end, and the inside of fastener body 1 is located to the awl end of fastener inner wedge 2. The inner wall of the mounting groove 11 is a smooth inner wall, and after the stranded wire 7 is placed in the wire clamp body 1, the stranded wire 7 is attached to the smooth inner wall of the mounting groove 11.

Illustratively, the curvature radius of the installation groove 11 is 8 times or more than 8 times of the diameter of the stranded wire 7. Compared with the prior art, the installation groove is short in length and reduces bending deformation of the stranded wire 7, the curvature radius of the installation groove 11 is controlled to be more than 8 times of the diameter of the stranded wire 7, stress concentration is avoided, the stress state of the stranded wire 7 can be effectively relieved, damage is reduced, the service life of the stranded wire 7 is prolonged, and long-term stable operation is facilitated.

In the present embodiment, two U-bolts 3 are provided. Compared with the prior art, the utility model discloses reduced U type bolt 3's quantity, reduced the screw that probably appears in the operation not hard up risk of bringing for the unstable factor reduces. Meanwhile, fewer U-shaped bolts 3 are convenient for construction operation, the installation efficiency is greatly improved, and the construction period is shortened. In addition, after the U-shaped bolts 3 are reduced, the overall size of the wire clamp can be properly shortened, meanwhile, the integral wire clamp is changed into a split type, the sizes of parts are reduced, the production and the processing are convenient, and the yield is improved. Of course, in other embodiments, the U-shaped bolt 3 may be provided in other numbers, which is not limited by the present invention.

Further, be equipped with locking piece 12 in the fastener body 1, locking piece 12 with the cooperation of fastener body 1 forms mounting groove 11. The wire clamp body 1 is matched with the locking block 12 inside, so that the pre-tightening effect is enhanced, the grip strength requirement is completely met, and the use performance of the product is improved.

In this embodiment, a wire clamp casing 5 and a hanging plate 6 are arranged on the outer side of the wire clamp body 1, and the wire clamp casing 5, the hanging plate 6, the wire clamp body 1 and the locking block 12 are fixedly connected through bolts. The design of fastener cover shell 5 can effectual improvement mechanical strength, and the wholeness can be promoted by a wide margin. When the cable clamp is installed, a bolt sequentially penetrates through the hanging holes of the cable clamp casing 5, the hanging plate 6, the cable clamp body 1 and the locking block 12 from outside to inside and then penetrates out, so that the components are combined together.

Furthermore, one end, far away from the wire clamp inner wedge 2, of the U-shaped bolt 3 is connected with a gland 4, and the gland 4 is used for abutting against a stranded wire 7. And a wave line groove is formed in the second end of the wire clamp inner wedge 2 and one side, close to the stranded wire 7, of the gland 4. When the U-shaped bolt 3 is screwed, the wavy wire groove can improve the pressing effect on the wire, so that the holding force of the bolt type wire clamp is improved.

The implementation principle of the bolt type wedge-shaped strain clamp in the embodiment of the application is as follows: firstly, installing a wire clamp inner wedge 2 and a gland 4 at the drainage wire end of a stranded wire 7, then placing the conical end of the wire clamp inner wedge 2 into a wire clamp body 1, then installing and fastening a U-shaped bolt 3, preliminarily fixing the stranded wire 7, adjusting the wedging position and direction of the wire clamp inner wedge 2, screwing the U-shaped bolt 3 according to a specified torque value, and finishing installation.

The utility model discloses combined the structural feature of bolt type strain clamp and wedge type strain clamp, through the self-locking effect cooperation of wedge in less U type bolt and the fastener, reached the required grip value to the stranded conductor of product, product application scope is wide, simple to operate, and convenient to overhaul and change have obvious improvement in the aspect of protecting the wire, have improved the life of stranded conductor.

The above-mentioned embodiments further describe the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention. It should be understood that any modification, equivalent replacement, or improvement made by those skilled in the art without departing from the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a bolt formula wedge strain clamp, its characterized in that, includes fastener body, fastener inner wedge, U type bolt, this internal mounting groove that is used for holding the stranded conductor that is equipped with of fastener, the first end of fastener inner wedge is located in the mounting groove, the first end of fastener inner wedge is used for closely cooperating with the stranded conductor, U type bolt with the second end of fastener inner wedge is connected.

2. The bolted wedge strain clamp of claim 1, wherein a gland is attached to an end of said U-bolt distal from said wedge in said clamp, said gland adapted to abut against a strand.

3. The bolted wedge strain clamp of claim 1, wherein a locking block is disposed within the clamp body, the locking block cooperating with the clamp body to form the mounting groove.

4. The bolt-type wedge-shaped strain clamp according to claim 3, wherein a clamp casing and a hanging plate are arranged outside the clamp body, and the clamp casing, the hanging plate, the clamp body and the locking block are fixedly connected through bolts.

5. The bolted wedge strain clamp of claim 2, wherein the second end of the clamp inner wedge and the side of the gland adjacent the strand are each provided with a wave raceway.

6. The bolted wedge strain clamp of claim 1, wherein the radius of curvature of the mounting groove is 8 or more than 8 times the diameter of the strand.

7. The bolted wedge strain clamp of claim 1, wherein the interior walls of said mounting groove are rounded.

8. The bolted wedge strain clamp of claim 1, wherein there are two of said U-bolts.

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