CN210779998U

CN210779998U - Power transmission line wedge-shaped backup wire clamp with prestress

Info

Publication number: CN210779998U
Application number: CN201922042693.1U
Authority: CN
Inventors: 占龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-22
Filing date: 2019-11-22
Publication date: 2020-06-16
Anticipated expiration: 2029-11-22

Abstract

The utility model discloses a wedge-shaped backup wire clamp with prestress for a power transmission line, which comprises a wedge block for clamping a wire, an outer sleeve for sheathing and inhibiting the expansion of the wedge block, a tensioning device for preventing the wedge block from loosening and a hanging plate for connecting a tower pole; the wedge block is divided into an upper wedge piece and a lower wedge piece, the inner part of each wedge piece is arc-shaped and is provided with transverse grains, the wedge block is clamped in a wedge block outer sleeve, the wedge block outer sleeve is made of two open aluminum alloy sections and is buckled and connected with each other through bolts or other modes, the front end of the inner diameter of the wedge block outer sleeve is larger than the tail end of the wedge block outer sleeve, the tensioning device comprises tensioning plates which are fixedly arranged at the front end of the wedge block and the tail end of the wedge block outer sleeve respectively, and the two tensioning plates are mutually connected and. The wedge backup wire clamp can improve the connection firmness between the wedge block and the wedge block outer sleeve, so that the wedge backup wire clamp generates prestress on a wire, the wedge block is prevented from loosening and separating, and the wedge backup wire clamp is ensured to clamp the wire.

Description

Power transmission line wedge-shaped backup wire clamp with prestress

Technical Field

The utility model belongs to the technical field of transmission line, specifically be a transmission line wedge spare fastener with prestressing force.

Background

The transmission lines among the specified wire towers in the transmission lines need to be connected with wires, and on the 35 kV-500 kV transmission lines, the overhead wires among the wire towers possibly cause the accidents that the wires are separated from the original crimping pipes due to the influences of crimping defects, wind vibration, ice coating due to rain and snow, thermal cycle and the like in the operation process. In order to prevent the overhead transmission line from breaking, a set of wedge-shaped backup wire clamps are generally required to be added on the original transmission line to tension and reinforce the wire, and if the wire falls off from the crimping pipe, the wire clamps play a role in tensioning the wire, so that the backup effect is achieved. The wedge spare wire clamp principle is that the voussoir presss from both sides in the wire outside, and the voussoir overcoat presss from both sides in the voussoir outside and fixed, and the wedge wire clamp that contains voussoir and voussoir overcoat is connected with the tower pole with link fitting such as link plate, and original wedge spare wire clamp is under the condition that does not have prestressing force or does not receive pulling force at all, and the voussoir is easy not hard up and probably falls from the voussoir overcoat.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to above problem, provide a transmission line wedge type backup wire clamp with prestressing force, it can improve the firm in connection nature between voussoir and the voussoir overcoat and make wedge backup wire clamp produce prestressing force and hold the wire to the wire, ensures the firm stability of wire that wedge backup wire clamp cliied, prevents that wedge backup wire clamp voussoir from breaking away from the wire and falling.

In order to achieve the above object, the utility model adopts the following technical scheme:

a transmission line wedge backup wire clamp with prestress comprises a wedge block for clamping a wire, a wedge block outer sleeve for sheathing and clamping the wedge block, and a tensioning frame hinged on the wedge block outer sleeve; a tensioning device for promoting the wedge block to be clamped in the wedge block outer sleeve is arranged between the wedge block and the wedge block outer sleeve; the tensioning device comprises tensioning plates which are fixedly arranged at the front end of the wedge block and the tail end of the wedge block casing respectively, and the two tensioning plates are connected with each other through connecting rods positioned at the two ends.

As a further improvement of the above technical solution:

the tensioning plate is formed by oppositely overlapping two clamping groove plates; the clamping groove plate is provided with a U-shaped groove for clamping the wedge block, and two ends of the U-shaped groove are provided with mounting holes for mounting the connecting rod.

The head of the wedge block is provided with an annular groove, and a tensioning plate positioned at the head of the wedge block is clamped in the annular groove; and a tensioning plate positioned in the tail part of the wedge block outer sleeve is clamped at the tail part of the wedge block outer sleeve.

The wedge block consists of two clamping plates, and arc-shaped grooves for clamping the wires are arranged on the inner side surfaces of the two clamping plates; the wedge block is integrally conical; the inner cavity of the wedge block outer sleeve is a conical cavity matched with the wedge block.

The front end of one of the clamping plates is provided with a guide plate bent outwards; and the tail end of the guide plate is provided with a clamping block which is used for clamping a wire together with the guide plate through a bolt.

Compared with the prior art, the utility model has the advantages of:

through add on the fastener and establish straining device, adopt take-up plate and connecting rod to mutually support and fix voussoir overcoat and voussoir for even the wire is not hard up from the crimping pipe also can ensure that the fastener presss from both sides the wire tight can not become flexible.

Drawings

FIG. 1 is a schematic structural view of the cable clamp;

FIG. 2 is a schematic top view of the wire clamp;

FIG. 3 is a schematic sectional structure view of the cable clamp;

FIG. 4 is a schematic end face structure of the cable clamp;

FIG. 5 is a schematic structural view of two slot plates stacked oppositely;

FIG. 6 is a schematic structural view of a single card slot plate;

fig. 7 is a schematic view of the installation structure of the wire clamp.

In the figure: 1. a wedge block; 2. a wedge block outer sleeve; 3. tensioning the plate; 4. a connecting rod; 5. a guide plate; 6. a clamping block; 7. a wire; 8. tensioning the frame; 9. hanging the plate; 10. crimping the tube; 31. a slot clamping plate; 32. mounting holes; 33. a clamping groove.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.

As shown in fig. 1-7, the specific structure of the present invention is:

a transmission line wedge backup wire clamp with prestress comprises a wedge block 1 for clamping a wire 7, a wedge block outer sleeve 2 for sheathing and clamping the wedge block 1, and a tensioning frame 8 hinged on the wedge block outer sleeve 2; a tension device for promoting the wedge block 1 to be clamped in the wedge block outer sleeve 2 is arranged between the wedge block 1 and the wedge block outer sleeve 2; the tensioning device comprises tensioning plates 3 fixedly arranged at the front end of the wedge block 1 and the tail end of the wedge block casing 2 respectively, and the two tensioning plates 3 are connected with each other through connecting rods 4 positioned at the two ends.

Wherein the connecting rod 4 is a cylindrical rod, both ends of the connecting rod are provided with threads, and the connecting rod 4 passes through the mounting holes at both ends of the tensioning plate 3 and then is connected and fixed through nuts. The tensioning frame 8 can be connected with a hanging plate on the wire tower, so that the wire clamp is hung and cannot fall down.

Further optimization is carried out on the basis of the embodiment:

as shown in fig. 5 and 6, in order to enable the tensioning plate 3 to clamp the wedge block 1, the tensioning plate 3 is formed by oppositely stacking two clamping groove plates 31; the slot plate 31 is provided with a U-shaped slot for clamping the wedge block 1, and two ends of the slot plate are provided with mounting holes 32 for mounting the connecting rod 4.

The head of the wedge block 1 is provided with an annular groove, and a tensioning plate 3 positioned at the head of the wedge block 1 is clamped in the annular groove; the tensioning plate 3 positioned in the tail part of the wedge block outer sleeve 2 is clamped at the tail part of the wedge block outer sleeve 2.

In order to allow the notch plate 31 to catch the wedge 1 while being blocked by the wedge housing 2, the U-shaped notch is smaller than the maximum outer diameter of the wedge housing 2.

As shown in fig. 3-4, the wedge block 1 is composed of two clamping plates, and arc-shaped grooves for clamping wires are arranged on the opposite inner side surfaces of the two clamping plates; the wedge block 1 is integrally conical; the inner cavity of the wedge block outer sleeve 2 is a conical cavity matched with the wedge block 1.

After the wire 7 is placed into the wedge block 1, the wedge block 1 is inserted into the wedge block outer sleeve 2 and then is extruded and fixed through the tensioning device, and the tapered wedge block 1 is always extruded by the inner cavity of the wedge block outer sleeve 2, so that the wedge block 1 clamps the wire 7 and cannot loosen.

Because the lead 7 needs to be bent and connected in a turning way in the connection process, the front end of one of the clamping plates is provided with the guide plate 5 bent towards the outer side; the tail end of the guide plate 5 is provided with a clamping block 6 which is used for clamping a wire 7 together with the guide plate 5 through a bolt.

This fastener theory of operation:

as shown in fig. 7, after the wire 7 is placed into the wedge block 1, the wedge block 1 is inserted into the wedge block outer sleeve 2, then the two clamping groove plates 31 are oppositely stacked and installed, so that the middle mounting hole 32 is clamped in the groove at the front end of the wedge block 1, then the other two clamping groove plates 31 are oppositely stacked and installed, so that the middle mounting hole 32 is clamped at the tail end of the wedge block outer sleeve 2, the two ends of the two tensioning plates 3 are fixedly connected with the nut through the connecting rod 4, the tapered wedge block 1 is always extruded by the inner cavity of the wedge block outer sleeve 2, and the wedge block 1 clamps the wire 7 and cannot be loosened.

The tensioning frame 8 of the wire clamp is connected with the wire tower hanging plate 9 through other connecting rods.

After passing through the wire clamp, the lead 7 is connected to a ground wire through a crimp tube 10.

When the lead 7 is bent and connected, the bent section of the lead 7 is attached to the guide plate 5, and the front end of the lead 7 is fixed through the clamping block 6.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims

1. A transmission line wedge spare wire clamp with prestress comprises a wedge block (1) for clamping a wire (7), a wedge block outer sleeve (2) for sheathing and clamping the wedge block (1), and a tensioning frame (8) hinged on the wedge block outer sleeve (2), and is characterized in that a tensioning device for urging the wedge block (1) to be clamped in the wedge block outer sleeve (2) is arranged between the wedge block (1) and the wedge block outer sleeve (2); the tensioning device comprises tensioning plates (3) fixedly arranged at the front end of the wedge block (1) and the tail end of the wedge block outer sleeve (2), and the two tensioning plates (3) are connected with each other through connecting rods (4) positioned at the two ends.

2. The prestressed wedge-shaped backup wire clamp for electric transmission lines according to claim 1, characterized in that the tension plate (3) is composed of two clamping groove plates (31) which are oppositely stacked; the clamping groove plate (31) is provided with a U-shaped groove for clamping the wedge block (1), and two ends of the clamping groove plate are provided with mounting holes (32) for mounting the connecting rod (4).

3. The prestressed wedge-shaped backup wire clamp for the power transmission line according to claim 2, characterized in that the head of the wedge block (1) is provided with an annular groove, and the tensioning plate (3) at the head of the wedge block (1) is clamped in the annular groove; the tensioning plate (3) positioned in the tail part of the wedge block outer sleeve (2) is clamped at the tail part of the wedge block outer sleeve (2).

4. The prestressed wedge-shaped backup wire clamp for the power transmission line according to claim 1, wherein the wedge block (1) is composed of two clamping plates, and arc-shaped grooves for clamping wires are formed in the opposite inner side surfaces of the two clamping plates; the wedge block (1) is integrally conical; the inner cavity of the wedge block outer sleeve (2) is a conical cavity matched with the wedge block (1).

5. The prestressed wedge-shaped backup wire clamp for the power transmission line according to claim 4, wherein a guide plate (5) bent towards the outside is arranged at the front end of one clamping plate; the tail end of the guide plate (5) is provided with a clamping block (6) which is used for clamping a wire (7) together with the guide plate (5) through a bolt.