CN207967877U - A kind of EHV transmission cable connection structure - Google Patents

Abstract

The utility model discloses a connection structure of an ultra-high voltage power transmission cable, which comprises symmetrically arranged left and right fixed plates, the upper and lower ends of the left and right fixed plates are fixed by buffers, the left and right fixed plates are Fasteners are fixed through the middle part; the buffer is provided with a sleeve, and the sleeve is inserted with a shaft handle, and the left and right sides of the expansion part of the shaft handle insertion end are respectively contacted with a first spring and a second spring, and the sleeve and the shaft The handles are respectively fixed on the inner side of the left fixing plate and the right fixing plate; during the implementation of the utility model, the cable first penetrates into the first perforation, then passes through the second perforation, and finally penetrates into the third perforation, under tension , the cable presses the abutment block, the insertion rod presses the wedge block, and finally presses the friction block to abut the fixed cable. The greater the cable tension, the higher the degree of abutment and fixation; when the tension is abnormal, the first spring and the second spring The telescoping plays a role in restraining buffering; it not only has self-fastening cables, but also suppresses abnormal cable tension caused by turbulent flow.

Description

A connection structure for ultra-high voltage transmission cables

technical field

The utility model relates to the field of electric equipment, in particular to an ultra-high voltage transmission cable connection structure.

Background technique

Ultra-high voltage transmission refers to the use of 500 kV - 1000 kV voltage level to transmit electric energy. If the 220 kV power transmission index is 100%, the relative investment per kilometer of ultra-high voltage power transmission, the relative cost per kWh power transmission of 100 kilometers, and the consumption of metal materials will all be greatly reduced, and the utilization rate of the line corridor will be significantly improved. improve.

Because the higher the transmission voltage is, the span between towers often exceeds 100 meters in the construction of transmission overhead lines, the joints between two sections of cables need to bear several tons of tension, and because ultra-high voltage transmission lines are mostly used in western regions and eastern regions. Therefore, most of them are located in areas with harsh natural climates, where high-altitude turbulent currents shake the cables, causing the tension of the joints to be in an unstable state and easy to break.

Utility model content

The purpose of the utility model is to overcome the above-mentioned problems in the prior art, and provide a connection structure for ultra-high voltage transmission cables, which not only has self-fastening cables, but also can suppress abnormal cable tension caused by turbulent flow.

In order to achieve the above-mentioned technical purpose and achieve the above-mentioned technical effect, the utility model is realized through the following technical solutions:

A connection structure for ultra-high voltage transmission cables, comprising symmetrically arranged left and right fixing plates, the upper and lower ends of the left and right fixing plates are fixed by buffers, and the middle parts of the left and right fixing plates are Fasteners are fixed throughout;

The buffer is provided with a sleeve, and the sleeve is plugged with a shaft handle, and the left and right sides of the expansion part of the plug-in end of the shaft shaft are respectively abutted against a first spring and a second spring. They are respectively fixed on the inside of the right and left fixing plates;

The fastener includes a body, and the body is provided with a first through hole, a second through hole and a third through hole from top to bottom, and an upper The friction block and the lower friction block, the insertion ends of the upper friction block and the lower friction block are respectively abutted against the upper wedge block and the lower wedge block, and the slope ends of the upper wedge block and the lower wedge block are respectively abutted against the insertion rod for insertion The slope at the end, and the non-insertion end of the insertion rod is fixed with an abutment block.

Further, a rubber block is inserted into the expansion part of the plug-in end of the shank, and the rubber block frictionally abuts against the inner wall of the sleeve under the pressure of the third spring in the expansion part.

Further, the first spring, the second spring and the third spring are all helical springs.

Further, the surface of the abutment block is provided with curved corners.

Further, the first through hole, the second through hole and the third through hole are arranged in parallel.

The benefit effect of the present utility model is:

The cable first passes through the first hole, then passes through the second hole, and finally passes through the third hole. Under tension, the cable presses the contact block, the insertion rod presses the wedge block, and finally presses the friction block to contact Fix the cable, the greater the tension of the cable, the higher the degree of abutment and fixation;

When the tension is abnormal, the expansion and contraction of the first spring and the second spring play the role of inhibiting buffering.

In the above operation, compared with the traditional method, it not only has self-fastening cables, but also can suppress abnormal cable tension caused by turbulent flow.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the structural representation of the cable connection structure described in the utility model;

Fig. 2 is the structural representation of buffer described in the utility model;

Fig. 3 is a structural schematic diagram of the fastener described in the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

As shown in Figures 1-3, the utility model is a connection structure for ultra-high voltage transmission cables, including symmetrically arranged left fixing plates 100 and right fixing plates 200, and the upper and lower ends of the left fixing plate 100 and the right fixing plate 200 pass through The buffer 300 is fixed, and the middle parts of the left fixing plate 100 and the right fixing plate 200 are fixed with fasteners 400;

The buffer 300 is provided with a sleeve 310, the sleeve 310 is plugged with a shaft 320, and the left and right sides of the expansion part of the plug-in end of the shaft 320 are respectively abutted against a first spring 330 and a second spring 340, and the sleeve 310 and the shaft 320 are respectively fixed on the inside of the right fixing plate 200 and the left fixing plate 100;

The fastener 400 includes a body 410. The body 410 is provided with a first through hole 420, a second through hole 430 and a third through hole 480 from top to bottom. There is an upper friction block 440 and a lower friction block 450, and the insertion ends of the upper friction block 440 and the lower friction block 450 are respectively abutted against an upper wedge block 441 and a lower wedge block 451, and the inclined plane ends of the upper wedge block 441 and the lower wedge block 451 are respectively The inclined surface of the inserting end of the inserting rod 460 is abutted against, and the non-inserting end of the inserting rod 460 is fixed with an abutting block 470 .

A preferred item of this embodiment is that a rubber block 321 is plugged into the expansion part of the shaft handle 320 , and the rubber block 321 frictionally abuts against the inner wall of the sleeve 310 under the pressure of the third spring 322 in the expansion part.

A preferred item of this embodiment is that the first spring 330 , the second spring 340 and the third spring 322 are all helical springs.

A preferred item of this embodiment is that the surface of the abutment block 470 is provided with curved corners.

A preferred item of this embodiment is that the first through hole 420 , the second through hole 430 and the third through hole 480 are arranged in parallel.

A specific application of this embodiment is:

The cable first passes through the first through hole 420, then passes through the second through hole 430, and finally passes through the third through hole 480. Under tension, the cable presses the contact block 470, and the insertion rod 460 presses the wedge block 441, 451 , finally pressing the friction blocks 440 and 450 to abut against the fixed cable, the greater the tension of the cable, the higher the degree of abutment and fixation;

When the tension is abnormal, the first spring 330 and the second spring 340 expand and contract to suppress buffering.

In the above operation, compared with the traditional method, it not only has self-fastening cables, but also can suppress abnormal cable tension caused by turbulent flow.

In the description of this specification, descriptions referring to the terms "one embodiment", "example", "specific example" and the like mean that the specific features, structures, materials and characteristics described in conjunction with the embodiment or example are included in the present invention. In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Obviously, many modifications and variations can be made based on the contents of this specification. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that those skilled in the art can well understand and utilize the utility model. The invention is to be limited only by the claims and their full scope and equivalents.

Claims (5)

1. A connection structure for extra-high voltage transmission cables, characterized in that: comprise a symmetrically arranged left fixed plate (100) and a right fixed plate (200), the left fixed plate (100) and the right fixed plate (200) up and down Both ends are fixed by buffers (300), and the middle parts of the left fixing plate (100) and the right fixing plate (200) are fixed with fasteners (400); The buffer (300) is provided with a sleeve (310), the sleeve (310) is plugged with a shaft (320), and the left and right sides of the expansion part of the insertion end of the shaft (320) are respectively abutted against The first spring (330) and the second spring (340), the sleeve (310) and the shank (320) are respectively fixed on the inside of the right fixing plate (200) and the left fixing plate (100); The fastener (400) includes a body (410), and the body (410) is provided with a first through hole (420), a second through hole (430) and a third through hole (480) from top to bottom, so The upper friction block (440) and the lower friction block (450) are plugged into the chute provided inside the first through hole (420) and the second through hole (430), and the upper friction block (440) and the lower friction block ( 450) are respectively abutted against an upper wedge (441) and a lower wedge (451), and the slope ends of the upper wedge (441) and the lower wedge (451) are respectively abutted against the insertion rod (460) The inclined surface of the connection end, and the non-insertion end of the insertion rod (460) is fixed with an abutment block (470). 2. A connection structure for ultra-high voltage power transmission cables according to claim 1, characterized in that: a rubber block (321) is plugged into the expansion part of the plug-in end of the shaft handle (320), and the rubber block (321 ) is in frictional contact with the inner wall of the sleeve (310) under the pressure of the third spring (322) in the expansion part. 3. A connection structure for extra-high voltage power transmission cables according to any one of claims 1-2, characterized in that: the first spring (330), the second spring (340) and the third spring (322) For uniform helical springs. 4. The connection structure of extra-high voltage power transmission cables according to claim 1, characterized in that: the surface of the abutment block (470) is provided with curved corners. 5. The connection structure of extra-high voltage power transmission cables according to claim 1, characterized in that: the first through hole (420), the second through hole (430) and the third through hole (480) are arranged in parallel.