CN217563045U - Top extension connecting device and regulator cubicle - Google Patents

Abstract

The utility model relates to a top extension connecting device and regulator cubicle, including first connecting piece and threaded connection spare, first connecting piece includes interior semi-conductive layer, outer semi-conductive layer and intermediate insulation layer, first connecting piece includes first interface, second interface, third interface and the end cap that sets up towards different directions respectively; threaded connection's one end with the sleeve pipe can be dismantled and be connected, the tip of generating line is provided with the generating line mounting hole, be provided with first mounting hole on the interior semi-conducting layer, threaded connection's the other end passes in proper order the generating line mounting hole first mounting hole can be dismantled with first nut and be connected. Be different from prior art, the utility model discloses can reduce the volume of top extension connecting piece, through threaded connection spare, the convenience is dismantled the installation of top extension connecting device, also convenient dismantles the generating line, and generating line adjustable length satisfies user's operation requirement.

Description

Top extension connecting device and regulator cubicle

Technical Field

The utility model relates to an electrical control cabinet technical field, in particular to top extension connecting device and regulator cubicle.

Background

The existing top expansion connecting piece is suitable for top or bottom full-insulation and full-sealing connection of equipment such as an inflatable cabinet and the like, and has two types of shielding type and non-shielding type. The full-insulation and full-sealing connection is realized, and the fatal defect caused by high-voltage exposure in severe weather is completely avoided. The size of a product interface meets the design of a C-shaped sleeve in the standard EN50180-50181, and the electrical performance meets the requirements in IEC60502 and GB 12706.4.

In a utility model with patent publication number CN203225492U, a built-in bus connecting structure for cabinet combination is disclosed, which comprises a cabinet combination bus and two bi-pass sleeves respectively embedded on side plates of gas boxes of different switch cabinets, wherein metal connecting pieces are arranged in the bi-pass sleeves, inner connecting ends of the metal connecting pieces are provided with inner connecting holes, and outer connecting ends of the metal connecting pieces are provided with outer connecting holes; the combined bus comprises an insulating outer sleeve and metal connecting columns wrapped in the insulating outer sleeve, and two ends of each metal connecting column are exposed out of two sides of the insulating outer sleeve.

In the process of implementing the present invention, the inventor finds the following problems in the prior art:

the existing top expansion connecting piece is large in size and inconvenient to detach, and a bus cannot meet the use requirement of a user.

SUMMERY OF THE UTILITY MODEL

Therefore, a top expansion connecting device and an electrical cabinet are needed to be provided for solving the technical problems that the existing top expansion connecting piece is large in size, inconvenient to detach and incapable of meeting the use requirements of users for a bus.

To achieve the above object, the present inventors provide a top extension connecting device, comprising:

the first connecting piece comprises a first interface, a second interface, a third interface and a plug, wherein the first interface, the second interface, the third interface and the plug are respectively arranged in different directions; and

threaded connection spare, threaded connection spare's one end with the connection can be dismantled to the sleeve pipe, the tip of generating line is provided with the generating line mounting hole, be provided with first mounting hole on the interior semi-conducting layer, threaded connection spare's the other end passes in proper order the generating line mounting hole first mounting hole can be dismantled with first nut and be connected.

Different from the prior art, the technical scheme of the application includes that a first connecting piece comprises an inner semi-conducting layer, an outer semi-conducting layer and an intermediate insulating layer, the inner semi-conducting layer, the intermediate insulating layer and the outer semi-conducting layer are sequentially arranged from inside to outside, the first connecting piece comprises a first interface, a second interface, a third interface and a plug, the first interface, the second interface, the third interface and the plug are respectively arranged in different directions, the first interface is matched with the plug, the second interface is used for being matched with a bus, and the third interface is used for being matched with a sleeve of an electrical cabinet; threaded connection spare's one end with the connection can be dismantled to the sleeve pipe, the tip of generating line is provided with the generating line mounting hole, be provided with first mounting hole on the interior semi-conducting layer, threaded connection spare's the other end passes in proper order the generating line mounting hole first mounting hole can be dismantled with first nut and be connected. So, can set up the tip of generating line in the second interface, the sleeve pipe can set up in the third interface, can reduce the volume of top extension connecting piece, through threaded connection spare, conveniently dismantles top extension connecting device, also conveniently dismantles the generating line, and generating line adjustable length satisfies user's operation requirement.

As an embodiment of the utility model, threaded connection spare is stud, the third interface sets up down, be provided with on the sleeve pipe with threaded connection spare bottom threaded connection's sleeve pipe mounting hole. So, when using, can be earlier at the first stud of fastening on the sleeve pipe, stud passes generating line mounting hole, first mounting hole in proper order again and can dismantle with first nut and be connected, and the convenience is connected to dismantling to forming between first connecting piece and the sleeve pipe.

As an embodiment of the present invention, the top-expanded connecting device further includes a second connecting member, the second connecting member has a same structure as the first connecting member, and the two ends of the bus bar are respectively used for the second interface of the first connecting member and the second interface of the second connecting member. So, can realize the cabinet combining of regulator cubicle through the cooperation of first connecting piece, generating line, second connecting piece, make things convenient for the cabinet combining.

As an embodiment of the present invention, the inner semi-conducting layer includes a connecting portion, the first mounting hole is located on the connecting portion, the two ends of the bus bar are respectively provided with a first extending portion and a second extending portion extending along the horizontal direction, the first extending portion is provided with the bus bar mounting hole on the second extending portion, the second interface is disposed towards the horizontal direction, the first extending portion is located the first connecting piece below the connecting portion, the second extending portion is located the second connecting piece above the connecting portion. So, be located the below of the connecting portion of first connecting piece through first extension, the second extension is located the top of the connecting portion of second connecting piece, makes things convenient for first connecting piece, second connecting piece to fix a position the both ends of generating line, and the both ends of generating line all can be connected with first connecting piece, second connecting piece, improves the commonality of generating line.

As an embodiment of the present invention, the first connecting member further includes a first nut, the plug is provided with a cavity, the first nut is disposed in the cavity, the first nut is connected to the other end of the threaded connecting member. So, can be through first nut and threaded connection's other end threaded connection, conveniently dismantle, install first connecting piece, threaded connection.

As an embodiment of the utility model, the inner semi-conducting layer includes connecting portion, first mounting hole is located on the connecting portion, first nut with still be provided with between the connecting portion and play pad and flat pad, first nut play pad flat pad sets gradually in the cavity. So, through being provided with bullet pad and flat pad between first nut and connecting portion, the flat pad is for increasing screw stress surface, and the bullet pad is not hard up in order to prevent the screw, plays a certain amount of buffering guard action during the atress.

As an embodiment of the present invention, the first interface is set up, the end cap is located in the first interface, the top expansion connecting device further includes a protective cap, the protective cap is in on the first interface. So, can further avoid in dust, water get into threaded connection spare through the helmet, improve the security of first connecting piece, avoid unexpected emergence.

To achieve the above object, the inventor further provides an electrical cabinet, including the top expansion connecting device as described in any one of the above inventor.

Be different from prior art, the regulator cubicle of the technical scheme of this application can set up the tip of generating line in the second interface, and the sleeve pipe can set up in the third interface, can reduce the volume of top extension connecting piece, through threaded connection spare, conveniently dismantles the installation of top extension connecting device, also conveniently dismantles the generating line, and generating line length is adjustable, satisfies user's operation requirement.

The above description of the present invention is only an overview of the technical solutions of the present application, and in order to make the technical solutions of the present application more clearly understood by those skilled in the art, further, the present invention can be implemented according to the contents described in the text and the drawings of the present application, and in order to make the above objects, other objects, features, and advantages of the present application more easily understood, the following description will be made in conjunction with the detailed description of the present application and the drawings.

Drawings

The drawings are only for purposes of illustrating the principles, implementations, applications, features, and effects of particular embodiments of the present application, as well as others related thereto, and are not to be construed as limiting the application.

In the drawings of the specification:

FIG. 1 is a schematic view of a top expansion joint according to an embodiment of the present application;

FIG. 2 is an exploded view of a top expansion joint according to one embodiment of the present application;

FIG. 3 is a schematic structural diagram of a first connector according to one embodiment of the present application;

FIG. 4 is a schematic view of a second connector according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a bus bar according to an embodiment of the present application.

The reference numerals referred to in the above figures are explained below:

1. a first connecting piece is arranged at the bottom of the shell,

11. an inner semi-conducting layer, which is,

111. a first mounting hole is formed in the first mounting hole,

112. a connecting part which is connected with the connecting part,

12. an outer semi-conducting layer, which is,

13. an intermediate insulating layer is formed on the substrate,

14. a first interface for the first and the second communication interfaces,

15. the second interface is connected with the first interface,

16. a third interface for the second communication unit to communicate with the first communication unit,

17. a plug is arranged at the bottom of the container,

171. the cavity body is provided with a cavity body,

18. a first nut is arranged on the first side of the nut,

19. the elastic pad is arranged on the upper surface of the elastic pad,

20. the utility model is a flat cushion which is provided with a flat cushion,

21. the cushion block is arranged on the upper surface of the frame,

2. a threaded connecting piece is arranged on the outer side of the shell,

3. a bus bar is arranged on the base plate,

31. a bus bar mounting hole is formed in the bus bar mounting hole,

32. a first extension part which is arranged at the first side of the frame,

33. a second extension part which is arranged at the second side of the frame,

4. the casing pipe is provided with a plurality of casing pipes,

41. a sleeve mounting hole is formed in the sleeve,

5. a second connecting piece is arranged on the first connecting piece,

6. a protective cap.

Detailed Description

To explain in detail the possible application scenarios, technical principles, and practical embodiments of the present application, and to achieve the objectives and effects thereof, the following detailed description is given with reference to the accompanying drawings. 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 otherwise defined, 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 only to describe particular embodiments 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 are to 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 pertains in accordance with specific situations.

The existing top expansion connecting piece is suitable for top or bottom full-insulation and full-sealing connection of equipment such as an inflatable cabinet and the like, and has two types of shielding type and non-shielding type. The full-insulation and full-sealing connection is realized, and the fatal defect caused by high-voltage exposure in severe weather is completely avoided.

In the prior art, the top expansion connecting piece on the market at present has a large volume, and part of the bus 3 cannot be customized according to the requirements of customers. The existing top expansion connecting piece is not convenient to disassemble, and the bus 3 can not meet the use requirement of users on the adjustable length of the bus 3.

The applicant researches and discovers that the detachable first connecting piece 1 and the detachable threaded connecting piece 2 can be arranged, the end part of the bus 3 can be arranged in the second interface 15, the sleeve 4 can be arranged in the third interface 16, the size of the top expansion connecting piece can be reduced, the top expansion connecting device can be conveniently mounted and dismounted through the threaded connecting piece 2, the bus 3 can be conveniently dismounted, the length of the bus 3 can be adjusted, and the use requirements of users can be met.

The top extension connecting device and the electrical cabinet related to the embodiment can be applied to cabinet combination of various electrical cabinets and can connect two electrical cabinets in series.

According to some embodiments of the present application, please refer to fig. 1 to 5, the present embodiment relates to a top-extended connecting device, which includes a first connecting member 1 and a threaded connecting member 2, the first connecting member 1 includes an inner semi-conducting layer 11, an outer semi-conducting layer 12 and an intermediate insulating layer 13, the inner semi-conducting layer 11, the intermediate insulating layer 13 and the outer semi-conducting layer 12 are sequentially disposed from inside to outside, the first connecting member 1 includes a first interface 14, a second interface 15, a third interface 16 and a plug 17 respectively disposed facing different directions, the first interface 14 is matched with the plug 17, the second interface 15 is used for matching with a bus 3, and the third interface 16 is used for matching with a bushing 4 of an electrical cabinet; one end of the threaded connecting piece 2 is detachably connected with the sleeve 4, a bus mounting hole 31 is formed in the end portion of the bus 3, a first mounting hole 111 is formed in the inner semi-conducting layer 11, and the other end of the threaded connecting piece 2 sequentially penetrates through the bus mounting hole 31 and the first mounting hole 111 to be detachably connected with the first nut 18.

The first connecting piece 1 is a connecting piece of a three-way joint, wherein one end of the connecting piece is sealed by a plug 17, the other two ends of the connecting piece are respectively connected with the three-phase electricity of the electrical equipment, and the other end of the connecting piece is electrically connected with the bus 3. The first connecting part 1 is made of an inner semiconducting layer 11, an intermediate insulating layer 13 and an outer semiconducting layer 12 from the inside to the outside.

The surface of the conductor is added with a layer of shielding layer made of a semi-conductive material, the inside and the outside of the main insulating layer are provided with semiconductor layers, the inner semiconductor layer fills the air gap between the conductor and the insulating layer and the unevenness on the surface of the conductor to form a smooth surface to be combined with the insulating layer, and the electric field distribution between the insulating layer and the conductor is ensured to be as uniform as possible. In addition, the outer semiconductor layer also has the functions of discharging induced charges and homogenizing potential gradient. The two semiconductor layers form an equidistant surface inside and outside the main insulating layer, which is also an important condition for ensuring the uniform change of the electric field.

The cable conductor is formed by twisting a plurality of conducting wires, an air gap is easily formed between the cable conductor and the insulating layer, the surface of the cable conductor is not smooth, and electric field concentration can be caused. A shielding layer of semi-conductive material is added on the surface of the conductor, and the shielding layer is equipotential with the shielded conductor and is in good contact with the insulating layer, so that partial discharge between the conductor and the insulating layer is avoided, and the shielding layer is an inner shielding layer.

The bus 3 (bus line) is made of high-conductivity copper (copper bar) and aluminum materials, is used for transmitting electric energy, and has the capacity of collecting and distributing electric power. And the power station or the transformer substation transmits a main lead for electric energy. Through it, the electric energy output by the generator, transformer or rectifier is delivered to the individual users or other substations. Mathematically, it refers to a straight line that moves under certain conditions to produce a surface.

The threaded connecting piece 2 is a stud bolt of M16/M12, the lower half section is a thread of M16, and the upper half section is a thread of M12.

The structure of the second connecting piece 5 is the same as that of the first connecting piece 1, and only one direction is changed, so the specific structure is not repeated.

In this embodiment, the first connecting member 1 includes an inner semiconductive layer 11, an outer semiconductive layer 12, and an intermediate insulating layer 13, the inner semiconductive layer 11, the intermediate insulating layer 13, and the outer semiconductive layer 12 are sequentially disposed from inside to outside, the first connecting member 1 includes a first interface 14, a second interface 15, a third interface 16, and a plug 17 that are disposed facing different directions, respectively, the first interface 14 is matched with the plug 17, the second interface 15 is used for being matched with the bus 3, and the third interface 16 is used for being matched with the bushing 4 of the electrical cabinet; one end of the threaded connecting piece 2 is detachably connected with the sleeve 4, a bus mounting hole 31 is formed in the end portion of the bus 3, a first mounting hole 111 is formed in the inner semi-conducting layer 11, and the other end of the threaded connecting piece 2 sequentially penetrates through the bus mounting hole 31 and the first mounting hole 111 to be detachably connected with the first nut 18.

So, can set up the tip of generating line 3 in second interface 15, sleeve pipe 4 can set up in third interface 16, can reduce the volume of top extension connecting piece, through threaded connection spare 2, conveniently dismantle the installation of top extension connecting device, also conveniently dismantle generating line 3, and generating line 3 adjustable length satisfies user's operation requirement.

According to some embodiments of the present application, optionally, the threaded connector 2 is a stud bolt, the third interface 16 is disposed downward, and the sleeve 4 is provided with a sleeve mounting hole 41 for threaded connection with the bottom of the threaded connector 2.

The sleeve mounting hole 41 is a threaded hole.

So, when using, can fix stud on sleeve pipe 4 earlier, stud passes generating line mounting hole 31, first mounting hole 111 in proper order again and can dismantle with first nut 18 and be connected, and the convenience is connected to dismantling to forming between first connecting piece 1 and the sleeve pipe 4.

According to some embodiments of the present application, optionally, the top expansion connecting device further includes a second connecting member 5, the structure of the second connecting member 5 is the same as that of the first connecting member 1, and two ends of the bus bar 3 are respectively used for connecting the second interface 15 of the first connecting member 1 and the second interface 15 of the second connecting member 5.

So, can realize the cabinet combination of regulator cubicle through the cooperation of first connecting piece 1, generating line 3, second connecting piece 5, make things convenient for the cabinet combination.

According to some embodiments of the present application, optionally, the inner semiconductive layer 11 includes a connection portion 112, the first installation hole 111 is located on the connection portion 112, the two ends of the bus bar 3 are respectively provided with a first extension portion 32 and a second extension portion 33 extending along the horizontal direction, the first extension portion 32 and the second extension portion 33 are both provided with bus bar installation holes 31, the second interface 15 is arranged towards the horizontal direction, the first extension portion 32 is located below the connection portion 112 of the first connection member 1, and the second extension portion 33 is located above the connection portion 112 of the second connection member 5.

Therefore, the first extending part 32 is located below the connecting part 112 of the first connecting piece 1, and the second extending part 33 is located above the connecting part 112 of the second connecting piece 5, so that the two ends of the bus 3 can be conveniently located by the first connecting piece 1 and the second connecting piece 5, the two ends of the bus 3 can be connected with the first connecting piece 1 and the second connecting piece 5, and the universality of the bus 3 is improved.

According to some embodiments of the present application, optionally, the first connecting element 1 further includes a first nut 18, the plug 17 is provided with a cavity 171, the first nut 18 is disposed in the cavity 171, and the first nut 18 is screwed with the other end of the threaded connecting element 2.

Therefore, the first nut 18 can be in threaded connection with the other end of the threaded connecting piece 2, and the first connecting piece 1 and the threaded connecting piece 2 can be conveniently detached and installed.

According to some embodiments of the present application, optionally, the inner semiconductor layer 11 includes a connection portion 112, the first mounting hole 111 is located on the connection portion 112, an elastic pad 19 and a flat pad 20 are further disposed between the first nut 18 and the connection portion 112, and the first nut 18, the elastic pad 19 and the flat pad 20 are sequentially disposed in the cavity 171.

As described above, by providing the elastic washer 19 and the flat washer 20 between the first nut 18 and the connecting portion 112, the flat washer 20 is used to increase the force bearing surface of the screw, and the elastic washer 19 plays a certain amount of buffer protection when receiving a force in order to prevent the screw from loosening.

According to some embodiments of the present application, optionally, the first interface 14 is disposed upward, the plug 17 is located in the first interface 14, and the top expansion joint further includes a protective cap 6, and the protective cap 6 covers the first interface 14.

So, can further avoid in dust, water get into threaded connection spare 2 through helmet 6, improve the security of first connecting piece 1, avoid unexpected emergence.

The installation step:

A. fastening the M16/M12 threaded connector 2 on the sleeve 4, and screwing the M16 end into the sleeve 4;

B. cleaning the matching surface of the first connecting piece 1 and the sleeve 4, and then uniformly coating a layer of silicone grease;

C. the first connecting piece 1 and the second connecting piece 5 are arranged at two ends of the bus 3, and the bus mounting hole 31 is ensured to be opposite to the sleeve mounting hole 41 after the bus is mounted;

D. sleeving a cushion block 21 on one end of the threaded connecting piece 2, wherein the cushion block 21 is positioned on the other side of the bus 3, and the thickness of the cushion block 21 is the same as that of the bus 3 and is used for filling up the thickness of the bus 3;

E. mounting the first connecting piece 1 and the second connecting piece 5 on the sleeves 4 of two electrical cabinets, and enabling the threaded connecting piece 2 to penetrate through the bus mounting hole 31;

F. sequentially loading a cushion block 21, a flat pad 20, an elastic pad 19 and a nut 18, and screwing by using a tool;

G. attaching a binding belt on the surface of the sleeve 4 for exhausting air, screwing in the cleaned plug 17 coated with silicone grease, screwing in the plug by using a tool (the torque is less than or equal to 30N × m), and then pulling out the binding belt;

H. sheathing a protective cap 6;

I. and the ground wire is connected, so that the ground wire is reliably grounded.

The embodiment also relates to an electrical cabinet, which comprises the top extension connecting device and a cabinet. Two three-phase cabinets are connected, one phase uses a three-way top extension connecting piece and a three-way top extension connecting piece, and three phases namely use three sets of top extension connecting pieces. The cabinet is a conventional electrical cabinet, and the specific principle of the cabinet is not described herein.

According to some embodiments of the present application, optionally, the present embodiment relates to a top-extended connecting device, including a first connecting member 1 and a threaded connecting member 2, where the first connecting member 1 includes an inner semiconductive layer 11, an outer semiconductive layer 12, and an intermediate insulating layer 13, the inner semiconductive layer 11, the intermediate insulating layer 13, and the outer semiconductive layer 12 are sequentially disposed from inside to outside, the first connecting member 1 includes a first interface 14, a second interface 15, a third interface 16, and a plug 17 that are respectively disposed facing different directions, the first interface 14 is matched with the plug 17, the second interface 15 is used for being matched with a bus bar 3, and the third interface 16 is used for being matched with a bushing 4 of an electrical cabinet; one end of the threaded connecting piece 2 is detachably connected with the sleeve 4, a bus mounting hole 31 is formed in the end portion of the bus 3, a first mounting hole 111 is formed in the inner semi-conducting layer 11, and the other end of the threaded connecting piece 2 sequentially penetrates through the bus mounting hole 31 and the first mounting hole 111 to be detachably connected with the first nut 18.

Be different from prior art, the regulator cubicle of the technical scheme of this application can set up the tip of generating line 3 in second interface 15, and sleeve pipe 4 can set up in third interface 16, can reduce the volume of top extension connecting piece, through threaded connection spare 2, conveniently dismantles generating line 3 to top extension connecting device installation, and the generating line 3 length is adjustable, satisfies user's operation requirement.

It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, changes and modifications made to the embodiments described herein, or equivalent structures or equivalent flow changes made by using the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the scope of the present invention.

Claims (8)

1. A top extension joint, comprising:

the first connecting piece comprises a first interface, a second interface, a third interface and a plug, wherein the first interface, the second interface, the third interface and the plug are respectively arranged in different directions; and

threaded connection spare, threaded connection spare's one end with the connection can be dismantled to the sleeve pipe, the tip of generating line is provided with the generating line mounting hole, be provided with first mounting hole on the interior semi-conductive layer, threaded connection spare's the other end passes in proper order the generating line mounting hole first mounting hole can be dismantled with first nut and be connected.

2. The top expansion joint as claimed in claim 1, wherein the threaded connector is a stud, the third port is disposed downward, and the sleeve is provided with a sleeve mounting hole for threadedly coupling with a bottom of the threaded connector.

3. The top extension connecting device of claim 1, further comprising a second connecting member having the same structure as the first connecting member, wherein two ends of the bus bar are respectively used for connecting the second interface of the first connecting member and the second interface of the second connecting member.

4. The top extension connecting device according to claim 3, wherein the inner semi-conductive layer comprises a connecting portion, the first mounting hole is located on the connecting portion, a first extending portion and a second extending portion extending in a horizontal direction are respectively disposed at two ends of the bus bar, the bus bar mounting hole is disposed on each of the first extending portion and the second extending portion, the second interface is disposed in the horizontal direction, the first extending portion is located below the connecting portion of the first connecting member, and the second extending portion is located above the connecting portion of the second connecting member.

5. The top extension connecting device of claim 1, wherein the first connecting member further comprises a first nut, the plug is provided with a cavity, the first nut is arranged in the cavity, and the first nut is in threaded connection with the other end of the threaded connecting member.

6. The top extension connecting device of claim 5, wherein the inner semi-conducting layer comprises a connecting portion, the first mounting hole is located on the connecting portion, an elastic pad and a flat pad are further arranged between the first nut and the connecting portion, and the first nut, the elastic pad and the flat pad are sequentially arranged in the cavity.

7. The top expansion connection device of claim 6, wherein the first port is oriented upward, the plug is positioned within the first port, and the top expansion connection device further comprises a protective cap that is capped over the first port.

8. An electrical cabinet comprising a top extension connection apparatus as claimed in any one of claims 1 to 7.

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