CN217240293U

CN217240293U - Cable connection structure for extension

Info

Publication number: CN217240293U
Application number: CN202123073911.1U
Authority: CN
Inventors: 林理; 汪童志; 吴昕高
Original assignee: Ceepower Co ltd
Current assignee: Ceepower Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-08-19
Anticipated expiration: 2031-12-08

Abstract

The utility model relates to a cable junction structure for extension, include two intermediate connectors and connect the generating line between two intermediate connectors, the intermediate connector includes intermediate connector body, binding post, connecting piece and insulating stopper, the intermediate connector body is hollow bar structure, and the middle part of intermediate connector body has seted up the connector, binding post, locking hole has been seted up to binding post's one end, and binding post's the other end is the cable junction end, and the connecting hole has been seted up respectively at the both ends of generating line, and binding post's locking hole and the connecting hole of generating line are connected to the connecting piece, and insulating stopper, cover are located outside the connecting piece, and connect in connector department. This a cable junction structure for extension is particularly useful for when two treat that connecting cable length is not enough, and the cable junction structure for extension of accessible comes to realize connecting two cable termination that have the certain distance, and also can realize the butt joint of two not equidimension cable termination through matcing different binding post.

Description

Cable connection structure for extension

Technical Field

The utility model relates to a cable junction technique device for well high voltage transmission and distribution lines especially relates to a cable junction structure for extension.

Background

In an electric power system, the intermediate connector serves to connect two cables and serves as an electrical insulation, and according to the prior art, the intermediate connector has a structure adopting cold shrinkage, thermal shrinkage and prefabrication. In the actual application, the middle heads of several different sizes are adopted to meet cables with different cross-section sizes, and meanwhile, the two cables are connected with the cable core in a pressed mode through copper pipe fittings so as to meet the through-flow requirement of a circuit, and the copper pipe fittings are deformed and cannot be detached after being pressed. Because conventional intermediate head is difficult to dismantle, dismantles and need destroy whole intermediate head and copper pipe gold utensil, consequently after breaking down, the installation convenience is very poor, and like this, two circuit high-speed joint or maintenance just put forward the requirement.

The common cold-shrink and thermal-shrinkage middle head in the market is used for expanding the inner diameter of a product, is reduced by using a tool when being installed and is tightly held on a cable, and has the defect that once the cable is installed, the cable cannot be disassembled for maintenance. And the problems of over short cable and difficult lap joint often occur.

Disclosure of Invention

For this reason, it is necessary to provide a cable connection structure for extension to solve the problems of the conventional intermediate joint that it is difficult to detach, and the cable is too short and difficult to lap.

To achieve the above object, the inventors provide a cable connection structure for extension, comprising:

two intermediate connectors and a bus bar connected between the two intermediate connectors,

the middle joint comprises a middle joint body, a wiring terminal, a connecting piece and an insulating plug, the middle joint body is of a hollow strip-shaped structure, the middle part of the middle joint body is provided with a connecting port,

a wiring terminal, wherein one end of the wiring terminal is provided with a locking hole, the other end of the wiring terminal is a cable connecting end,

two ends of the bus bar are respectively provided with a connecting hole,

the connecting piece is connected with the locking hole of the connecting terminal and the connecting hole of the bus,

and the insulating plug is covered outside the connecting piece and connected to the connecting port.

Furthermore, two connectors which are symmetrical up and down are arranged in the middle of the middle joint body.

Further, the edge of the connection port protrudes outward.

Furthermore, the connecting pieces are stud bolts, the number of the insulating plugs is two, and threaded holes matched with the stud bolts are formed in the two insulating plugs respectively.

Further, this be used for cable junction structure of extension still includes cable adapter stress cone, and cable adapter stress cone is used for connecting intermediate head body and treats the cable termination of connecting.

Furthermore, a bus insulating layer is sleeved on the bus, and extends into the middle joint body.

Furthermore, the shape of the insulating plug is a conical structure, and the insulating plug is matched with the connecting port.

Further, the cable connecting end of the wiring terminal is of a hollow columnar structure.

Further, the intermediate joint body is made of epoxy resin, phenolic resin, plastic or glass.

Further, the insulating plug is made of epoxy resin, phenolic resin, plastic or glass.

Different from the prior art, the technical scheme has the following advantages: this a cable junction structure for extension is particularly useful for when two treat that connecting cable length is not enough, and the cable junction structure for extension of accessible comes to realize connecting two cable termination that have certain distance, and also can realize the butt joint of two not equidimension cable termination through matcing different binding post. This a cable junction structure for extension installation and dismantlement are convenient, do not use any special equipment to install, connect reliably stably, satisfy the heavy current.

Drawings

Fig. 1 is a schematic overall structure view of a cable connection structure for extension according to the present embodiment;

FIG. 2 is a schematic structural view of an intermediate joint body of an extended cable connection structure according to the present embodiment;

fig. 3 is a schematic view of a terminal block for an extended cable connection structure according to the present embodiment;

FIG. 4 is a schematic view of an insulation plug for an extended cable connection structure according to the present embodiment;

fig. 5 is a schematic structural view of a bus bar for an extended cable connection structure according to the present embodiment.

Description of reference numerals:

1. an intermediate joint body;

2. a wiring terminal;

21. a locking hole;

22. a cable connection end;

3. a bus bar;

31. connecting holes;

4. a connecting member;

5. an insulating plug;

6. a connecting port;

7. a protrusion portion;

51. a threaded hole;

8. a cable adapter stress cone;

9. an electrical cable.

Detailed Description

In order to explain in detail possible application scenarios, technical principles, practical embodiments, and the like of the present application, the following detailed description is given with reference to the accompanying drawings in conjunction with the listed embodiments. The embodiments described herein are merely for more clearly illustrating the technical solutions of the present application, and therefore, the embodiments are only used as examples, and the scope of the present application is not limited thereby.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or related to other embodiments specifically defined. In principle, in the present application, the technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution as long as there is no technical contradiction or conflict.

Unless defined otherwise, technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of relational terms herein is intended to describe specific embodiments only and is not intended to limit the present application.

In the description of the present application, the term "and/or" is a expression for describing a logical relationship between objects, meaning that three relationships may exist, for example a and/or B, meaning: there are three cases of A, B, and both A and B. In addition, the character "/" herein generally indicates that the former and latter associated objects are in a logical relationship of "or".

In this application, terms such as "first" and "second" are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

Without further limitation, in this application, the use of "including," "comprising," "having," or other similar expressions in phrases and expressions of "including," "comprising," or "having," is intended to cover a non-exclusive inclusion, and such expressions do not exclude the presence of additional elements in a process, method, or article that includes the recited elements, such that a process, method, or article that includes a list of elements may include not only those elements but also other elements not expressly listed or inherent to such process, method, or article.

As is understood in the examination of the guidelines, the terms "greater than", "less than", "more than" and the like in this application are to be understood as excluding the number; the expressions "above", "below", "within" and the like are understood to include the present numbers. In addition, in the description of the embodiments of the present application, "a plurality" means two or more (including two), and expressions related to "a plurality" similar thereto are also understood, for example, "a plurality of groups", "a plurality of times", and the like, unless specifically defined otherwise.

In the description of the embodiments of the present application, spatially relative expressions such as "central," "longitudinal," "lateral," "length," "width," "thickness," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used, and the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the specific embodiments or drawings and are only for convenience of describing the specific embodiments of the present application or for the convenience of the reader, and do not indicate or imply that the device or component in question must have a specific position, a specific orientation, or be constructed or operated in a specific orientation and therefore should not be construed as limiting the embodiments of the present application.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and "disposed" used in the description of the embodiments of the present application should be construed broadly. For example, the connection can be a fixed connection, a detachable connection, or an integrated arrangement; it can be a mechanical connection, an electrical connection, or a communication connection; they may be directly connected or indirectly connected through an intermediate; which may be communication within two elements or an interaction of two elements. Specific meanings of the above terms in the embodiments of the present application can be understood by those skilled in the art to which the present application belongs according to specific situations.

In an electrical power system, the intermediate connector serves to connect two cables and serves as electrical insulation, and according to the prior art, the intermediate connector has a structure that employs cold shrinkage, heat shrinkage and prefabrication. In actual application, the middle heads of different sizes are adopted to meet the cables 9 with different cross sections, and meanwhile, the two cables are connected with the cable cores in a pressed mode through copper pipe fittings so as to meet the through-flow requirement of the line, and the copper pipe fittings are deformed and cannot be detached after being pressed. Because conventional intermediate head is difficult to dismantle, dismantles and need destroy whole intermediate head and copper pipe gold utensil, consequently after breaking down, the installation convenience is very poor, and like this, two circuit high-speed joint or maintenance just put forward the requirement.

The common cold-shrink and heat-shrink middle head in the market is used for expanding the inner diameter of a product, is reduced by using a tool when being installed, and is tightly held on the cable 9, and the common cold-shrink and heat-shrink middle head has the defect that once the cable is installed, the cable cannot be disassembled for maintenance. And the problems of over short cable and difficult lap joint often occur.

Referring to fig. 1 to 5, a cable connection structure for extending according to the present embodiment includes:

two intermediate joints and a busbar 3 connected between the two intermediate joints,

the middle joint comprises a middle joint body 1, a wiring terminal 2, a connecting piece 4 and an insulating plug 5, the middle joint body is of a hollow strip-shaped structure, the middle part of the middle joint body is provided with a connecting port 6,

a wiring terminal 2, one end of the wiring terminal is provided with a locking hole 21, the other end of the wiring terminal is a cable connecting end 22,

the two ends of the bus bar 3 are respectively provided with a connecting hole 31,

a connecting piece 4 which is connected with the locking hole 21 of the connecting terminal and the connecting hole 31 of the bus,

and the insulating plug 5 is covered outside the connecting piece 4 and is connected to the connecting port 6.

The utility model provides a cable junction structure for extension is particularly useful for when two treating connecting cable length not enough, and the cable junction structure for extension of accessible comes to realize connecting two cable termination that have the certain distance, and also can realize the butt joint of two not equidimension cable termination through matching different binding post.

The length of the bus 3 depends on the distance between two cable terminals to be connected, and buses with different lengths can be selected for different connection distances to realize connection.

The middle joint body 1 is made of insulating materials, the left side and the right side of the middle joint body are used as connecting interfaces of two to-be-connected cable terminals, and a connecting port formed in the middle of the middle joint body is used for fixing one cable terminal and one end of a bus which are arranged in the middle joint body.

The middle part of the middle joint body is close to the central point position in the length direction of the middle joint body, or is the central point position in the length direction of the middle joint body.

The terminal block 2 functions to fix the terminal of the cable to be connected and is fixed in the cable connection structure for extension through the locking hole.

In order to facilitate the lap joint of the wiring terminal 2 and the bus 3, the end part of the wiring terminal 2 provided with the locking hole is of a flat structure, the wiring terminal is lapped above the bus during connection, or the bus is lapped above the wiring terminal, and the locking hole of the wiring terminal is tightly matched with the connecting hole of the bus.

The insulating plug 5 serves to electrically block the cable connection structure for extension.

The wiring terminal is used for wiring in various electric control distribution equipment, complete equipment, multi-loop electric meter boxes and combined terminal electric appliance boxes. The wiring of the wiring terminal is firm and reliable, and the use is flexible and convenient. Can be used as bus bar, large current terminal, zero connection, grounding terminal, and equipotential terminal in various electrical devices.

The bus bar is a conductor for collecting, distributing, and transmitting electric energy in each electric device. When short-circuit failure occurs, the short-circuit current is subjected to heat generation and electromotive force, and thus the short-circuit current is an important primary element in high-and low-voltage electric appliances. The bus is divided into the following parts according to the cross section: rectangular, circular (or double-D shape) and slot-shaped bus bars 3.

When the cross-sectional areas of the buses are the same, the perimeter of the rectangular bus is larger than that of the circular bus, the heat dissipation effect is good, the cooling condition is good, moreover, under a certain allowable heating temperature, the current passed by the rectangular bus is larger than that of the circular bus, the skin effect of the circular bus is stronger, and the rectangular bus is more uniform, so the rectangular bus is generally adopted in the complete set of switch cabinets. The bus is made of: copper; aluminum; the copper in the steel has the highest conductivity, and the current-carrying capacity of the steel is the largest when the cross section area is the same; and steel is the smallest and is commonly used in PT circuits or arrester circuits.

In some preferred embodiments, two connecting ports 6 are formed in the middle of the middle joint body 1, and are vertically symmetrical. That is, the user can connect the terminal to the bus bar through the connection port on the upper portion of the intermediate joint body, or connect the terminal to the bus bar through the connection port on the lower portion of the intermediate joint body. When two connectors which are symmetrical up and down are arranged in the middle of the middle joint body, the upper connector and the lower connector are provided with insulating plugs, so that the cable connection structure for extension can realize more closed electrical plugging.

In some preferred embodiments, the edge of the connecting port 6 protrudes outwards, which has the advantage that it is easy to insert the insulating plug into the protrusion 7 of the connecting hole, so that a tighter connection can be achieved, and the insulating plug can be flush with the protruding end of the connecting port. When two connectors which are symmetrical up and down are arranged in the middle of the middle joint body, the edges of the two connectors protrude outwards, and a cross-shaped cable connection structure for extension can be formed.

In some more preferred embodiments, two connecting ports 6 are formed in the middle of the middle joint body, and are vertically symmetrical. The connecting pieces 4 are stud bolts, the number of the insulating plugs is two, and threaded holes 51 matched with the stud bolts are respectively formed in the two insulating plugs. The middle joint body is of a cross-shaped structure, is arranged in the locking hole of the wiring terminal and the connecting hole of the bus in a penetrating mode through the stud bolt and is connected with the upper insulating plug and the lower insulating plug through the stud bolt. The stud bolts not only play a role in fixing the wiring terminals and the bus bars, but also firmly fix the two insulating plugs on the middle joint body.

In a more preferred embodiment, the threaded hole is a blind hole. The beneficial effect is that the insulating plug 5 can not be communicated with the outside through the threaded hole, thereby forming a closed electric plug.

In certain preferred embodiments, the cable connection arrangement for lengthening further comprises a cable adaptor stress cone 8 for connecting the intermediate connector body with a cable termination to be connected.

The stress cone has the functions of improving the electric field distribution of the cable terminal and reducing the electric field intensity at the cable terminal.

When connecting cable terminals of different sizes, cable adapter stress cones of different inner diameters are selected.

In some preferred embodiments, the bus bar 3 is sleeved with a bus bar insulating layer, and the bus bar insulating layer extends into the intermediate joint body.

In some preferred embodiments, the insulating plug 5 has a tapered shape, and is adapted to the connection port. The connector has the beneficial effects that the insulation plug can be matched with the connector more tightly.

In certain preferred embodiments, the cable connection end 22 of the terminal is a hollow cylindrical structure. And (3) extending the cable terminal to be connected into the hollow structure of the wiring terminal, and fixing the wiring terminal on the cable terminal.

In certain preferred embodiments, the intermediate joint body is made of epoxy, phenolic, plastic or glass.

In certain preferred embodiments, the insulating plug is made of epoxy, phenolic, plastic or glass.

When the cable connection structure for extension is installed, two adaptive cable adapter stress cones are respectively installed on two cable terminals, and connecting terminals matched with the two cable terminals are respectively connected with the two cable terminals in a pressing mode; the connection structure of the other connection joint is referred to above.

Finally, it should be noted that, although the above embodiments have been described in the text and drawings of the present application, the scope of the patent protection of the present application is not limited thereby. All technical solutions which are generated by replacing or modifying the equivalent structure or the equivalent flow according to the contents described in the text and the drawings of the present application, and which are directly or indirectly implemented in other related technical fields, are included in the scope of protection of the present application.

Claims

1. A cable connection structure for extension, comprising:

two intermediate joints and a busbar connected between the two intermediate joints,

the two ends of the bus bar are respectively provided with a connecting hole,

2. The cable connection structure for elongation according to claim 1, wherein: two connectors which are symmetrical up and down are arranged in the middle of the middle joint body.

3. The cable connection structure for elongation according to claim 1 or 2, wherein: the edge of the connecting port protrudes outwards.

4. The cable connection structure for elongation according to claim 2, wherein: the connecting piece is a stud bolt, the number of the insulating plugs is two, and threaded holes matched with the stud bolts are formed in the two insulating plugs respectively.

5. The cable connection structure for elongation according to claim 1, wherein: the cable connection structure for extension further comprises a cable adapter stress cone, and the cable adapter stress cone is used for connecting the middle joint body and a cable terminal to be connected.

6. The cable connection structure for elongation as claimed in claim 1, wherein: the bus is sleeved with a bus insulating layer, and the bus insulating layer extends into the middle joint body.

7. The cable connection structure for elongation according to claim 1, wherein: the shape of the insulating plug is a conical structure, and the insulating plug is matched with the connector.

8. The cable connection structure for elongation as claimed in claim 1, wherein: the cable connecting end of the wiring terminal is of a hollow columnar structure.

9. The cable connection structure for elongation according to claim 1, wherein: the middle joint body is made of epoxy resin, phenolic resin or glass.

10. The cable connection structure for elongation according to claim 1, wherein: the insulating plug is made of epoxy resin, phenolic resin or glass.