CN218939409U

CN218939409U - Insulating wire clamp special for transformer

Info

Publication number: CN218939409U
Application number: CN202221979591.8U
Authority: CN
Inventors: 文世彬; 吴许谦; 刘克军; 黄其平; 欧波; 王超
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2023-04-28
Anticipated expiration: 2032-07-28

Abstract

The utility model discloses a special insulating wire clamp for a transformer, which comprises the following components: the device comprises a conductive terminal, an insulating shell, a pressing piece and a sealing joint, wherein the insulating shell is arranged on the outer side of the conductive terminal, the conductive terminal comprises a wire connecting end and a conductive column connecting end, a cavity for a wire to penetrate is formed in the wire connecting end, the pressing piece can press the wire on the inner wall of the cavity so as to ensure tight connection of the wire and the cavity, and the sealing joint is sleeved on the wire and is in sealing connection with an inlet of the cavity; the conductive column connecting end is in threaded connection with the conductive column of the transformer. The safety of the wire clamp can be effectively improved through the insulating shell, the wire clamp is not easy to be interfered by foreign objects, and secondly, the contact area of the conductive post and the conductive terminal can be effectively improved through threaded connection of the conductive post and the conductive terminal, so that the connection reliability is improved.

Description

Insulating wire clamp special for transformer

Technical Field

The utility model relates to the technical field of power systems, in particular to an insulating wire clamp special for a transformer.

Background

The transformer clamp plays a role in connecting a transformer and a wire, is usually in exposed connection, and in the use process, an external falling object can be hung between two phases, so that the risk of interphase short circuit occurs. In addition, the service life is shorter in severe weather environment. In addition, the contact area is smaller when the traditional transformer clamp is connected with the conductive column, so that the contact resistance is larger, and the problem of ablation adhesion caused by heating is easy to occur.

Disclosure of Invention

The utility model aims to provide an insulating wire clamp special for a transformer, which can effectively improve the safety and prolong the service life of the insulating wire clamp.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

an insulation clip special for a transformer, comprising: conductive terminal, insulating housing, compress tightly the piece, seal joint, conductive terminal's outside is equipped with insulating housing, conductive terminal includes wire link and conductive post link, be equipped with the cavity that is used for supplying the wire to penetrate in the wire link, compress tightly the piece and be used for with the wire compresses tightly on the inner wall of cavity, seal joint cover is established on the wire, and with the entrance sealing connection of cavity, conductive post link and the conductive post threaded connection of transformer.

Preferably, the device further comprises an insulating shielding cover, wherein the insulating shielding cover is used for being arranged at the joint of the conductive column connecting end and the conductive column.

Preferably, the insulating shielding cover further comprises a terminal sealing support and a terminal sealing gland, wherein the terminal sealing support is in threaded connection with the outer side of the insulating shell outside the connecting end of the conductive column, a connecting ring is arranged on the inner side of the upper end of the insulating shielding cover, the connecting ring is located between the terminal sealing support and the terminal sealing gland, and the terminal sealing support is located in the insulating shielding cover.

Preferably, a circular umbrella cover is arranged on the outer side of the insulating shell, and the upper end of the terminal sealing gland is positioned in the circular umbrella cover.

Preferably, the conductive post is sleeved with a nut and a disc-shaped spring washer, and the disc-shaped spring washer is located between the upper end of the nut and the lower end of the conductive terminal.

Preferably, a limiting part is arranged on the inner side of the bottom end of the terminal sealing support and is used for being in contact with the lower end of the insulating shell so as to limit the terminal sealing support to move upwards.

Preferably, the upper surface of the terminal sealing support is provided with an annular groove, and the lower end of the connecting ring is provided with an annular protrusion matched with the annular groove.

Preferably, a sealing gasket is arranged between the terminal sealing gland and the connecting ring.

Preferably, the inner side wall of the cavity is provided with a tooth surface contacting the outer side wall of the wire.

Preferably, the compressing element is a compressing bolt, at least one threaded hole is formed in the side wall of the cavity, a plurality of threaded holes are distributed along the axis direction of the cavity, through holes corresponding to the threaded holes one by one are formed in the insulating shell, the aperture of each through hole is larger than that of each threaded hole, the compressing bolt penetrates through the corresponding through hole to be in threaded connection with the corresponding threaded hole on the conductive terminal, the conducting wire is compressed, and the sealing cover is buckled on the corresponding through hole.

Compared with the prior art, the technical scheme has the following advantages:

the utility model provides a special insulating wire clamp for a transformer, which comprises the following components: the device comprises a conductive terminal, an insulating shell, a pressing piece and a sealing joint, wherein the insulating shell is arranged on the outer side of the conductive terminal, the conductive terminal comprises a wire connecting end and a conductive column connecting end, a cavity for a wire to penetrate is formed in the wire connecting end, the pressing piece can press the wire on the inner wall of the cavity so as to ensure tight connection of the wire and the cavity, and the sealing joint is sleeved on the wire and is in sealing connection with an inlet of the cavity; the conductive column connecting end is in threaded connection with the conductive column of the transformer. The safety of the wire clamp can be effectively improved through the insulating shell, the wire clamp is not easy to be interfered by foreign objects, and secondly, the contact area of the conductive post and the conductive terminal can be effectively improved through threaded connection of the conductive post and the conductive terminal, so that the connection reliability is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

Fig. 1 is a cross-sectional view of a special insulating wire clamp for a low-voltage side of a transformer according to an embodiment of the present utility model;

fig. 2 is an isometric view of a special insulation clip for a low-voltage side of a transformer according to an embodiment of the present utility model;

fig. 3 is a cross-sectional view of a special insulating wire clamp for a high-voltage side of a transformer according to an embodiment of the present utility model;

fig. 4 is an isometric view of a special insulation clip for a high voltage side of a transformer according to an embodiment of the present utility model.

The reference numerals are as follows:

1 is a conductive terminal, 1-1 is a wire connecting end, 1-2 is a conductive column connecting end, and 1-3 is a cavity;

2 is an insulating shell, and 2-1 is a circular umbrella cover;

the sealing cover is 3, the compression bolt is 4, the sealing joint is 5, the terminal sealing gland is 6, the sealing gasket is 7, the insulating shielding cover is 8, the terminal sealing support is 9, the dish-shaped spring washer is 10, the nut is 11, the conductive column is 12, and the wire is 13.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 4, fig. 1 is a cross-sectional view of a special insulation wire clip for a low-voltage side of a transformer according to an embodiment of the present utility model; fig. 2 is an isometric view of a special insulation clip for a low-voltage side of a transformer according to an embodiment of the present utility model; fig. 3 is a cross-sectional view of a special insulating wire clamp for a high-voltage side of a transformer according to an embodiment of the present utility model; fig. 4 is an isometric view of a special insulation clip for a high voltage side of a transformer according to an embodiment of the present utility model.

The embodiment of the utility model provides a special insulating wire clamp for a transformer, which is divided into a special insulating wire clamp for a low-voltage side of the transformer and a special insulating wire clamp for a high-voltage side of the transformer, and comprises the following components: the conductive terminal 1, the insulating shell 2, the pressing piece and the sealing joint 5 are arranged on the outer side of the conductive terminal 1, the insulating shell 2 is preferably integrally injection molded on the outer side of the conductive terminal 1, the injection molded shell is preferably plastic with high strength, high dielectric strength and good ageing resistance, and the conductive terminal 1 is preferably a special aluminum alloy material with high strength, non-magnetism and high conductivity; the conductive terminal 1 comprises a wire connecting end 1-1 and a conductive column connecting end 1-2, wherein the two connecting ends are of an integrated structure, a cavity 1-3 for a wire 13 to penetrate is arranged in the wire connecting end 1-1, a pressing piece can press the wire 13 on the inner wall of the cavity 1-3 so as to ensure the tight connection of the wire and the cavity, a sealing joint 5 is sleeved on the wire 13 and is in sealing connection with an inlet of the cavity 1-3, and the sealing joint 5 is preferably a waterproof sealing joint; the conductive post connecting end 1-2 is in threaded connection with the conductive post 12 of the transformer. Wherein the axis of the cavity 1-3 in the wire connection end 1-1 and the axis of the threaded hole in the conductive post connection end 1-2 are preferably in a mutually perpendicular relationship. The safety of the wire clamp can be effectively improved through the insulating shell 2, the wire clamp is not easy to be interfered by foreign objects, and secondly, the contact area of the conductive post 12 and the conductive terminal 1 can be effectively improved through threaded connection, so that the connection reliability is improved.

The special insulating wire clamp for the low-voltage side of the transformer is different from the special insulating wire clamp for the high-voltage side of the transformer in that: the axis of the wire connecting end 1-1 and the axis of the conductive column connecting end 1-2 in the special insulating wire clamp for the low-voltage side of the transformer are preferably arranged at 90 degrees, and the wire connecting end 1-1 is separated from the inside of the conductive column connecting end 1-2, namely the cavity 1-3 is not communicated with the conductive column connecting end 1-2; the axis of the wire connecting end 1-1 and the axis of the conductive column connecting end 1-2 in the special insulating wire clamp for the high-voltage side of the transformer are preferably arranged at an obtuse angle, and the wire connecting end 1-1 is communicated with the inside of the conductive column connecting end 1-2; the other structures are the same.

The inner side wall of the cavity 1-3 is provided with a tooth surface which is in contact with the outer side wall of the wire 13, such as a sawtooth-shaped cambered surface, the inner side wall of the cavity 1-3 can also be of a thread structure, and when the wire 13 is pressed on the inner side wall of the cavity 1-3 by the pressing piece, an oxide layer on the surface of the wire 13 can be pierced through the tooth surface, so that the electric contact between the conductive terminal 1 and the wire 13 is more reliable; the compressing element is preferably a compressing bolt 4, at least one threaded hole is arranged on the side wall of the cavity 1-3, a plurality of threaded holes are distributed along the axis direction of the cavity 1-3, through holes corresponding to the threaded holes one by one are formed in the insulating shell 2, the aperture of each through hole is larger than that of each threaded hole, so that the head of the compressing bolt 4 is contained in each through hole, the compressing action on the conducting wire 13 can be achieved through one compressing bolt 4, but the compressing effect of the conducting wire 13 can be improved through the plurality of compressing bolts 4, when the compressing bolt 4 penetrates into the through holes to be in threaded connection with the threaded holes on the conducting terminal 1 during assembly, the sealing cover 3 is buckled on the through holes, and the sealing cover 3 is preferably a rubber sealing cover.

The conductive column connecting end 1-2 is preferably in a cylindrical structure, a threaded hole connected with the conductive column 12 is formed in the cylindrical structure, and the insulating housing 2 outside the conductive column connecting end 1-2 is also in a cylindrical structure correspondingly.

In one embodiment of the utility model, the insulating shielding cover 8 is further comprised, the insulating shielding cover 8 is preferably made of rubber material with high dielectric strength and good ageing resistance, the upper end of the insulating shielding cover 8 is covered on the insulating shell 2 outside the conductive column connecting end 1-2, rainwater can be prevented from entering through the insulating shielding cover 8, and the insulating shielding cover 8 is preferably of a cone-shaped cylinder structure with a small upper part and a large lower part so as to play a role of water guide.

In order to improve the installation effect of the insulating shielding cover 8, in the embodiment, the insulating shielding cover further comprises a terminal sealing support 9 and a terminal sealing gland 6, the terminal sealing support 9 and the terminal sealing gland 6 are in threaded connection with the outer side of the insulating shell 2 of the conductive column connecting end 1-2, a connecting ring is arranged on the inner side of the upper end of the insulating shielding cover 8 and positioned between the terminal sealing support 9 and the terminal sealing gland 6, the terminal sealing support 9 is positioned in the insulating shielding cover 8, and when the terminal sealing support 9 and the terminal sealing gland 6 are matched and pressed, a certain extrusion effect can be achieved on the connecting ring, and the connecting ring can be used as a sealing ring at the moment. Wherein can set up sealing gasket 7 between terminal seal gland 6 and the go-between, can prevent when rotatory terminal seal gland 6, drive insulating shielding cover 8 and terminal seal support 9 synchronous revolution, reduce terminal seal gland 6 simultaneously and to the extrusion destruction of go-between, and further improved the sealed effect of terminal seal gland 6 and go-between junction.

In order to ensure the position installation accuracy of the insulating shield cover 8, a limit part is arranged on the inner side of the bottom end of the terminal sealing support 9, and when the limit part contacts with the lower end of the insulating shell 2, the terminal sealing support 9 can be limited to move upwards.

Further, the upper surface of the terminal sealing support 9 is provided with an annular groove, the lower end of the connecting ring is provided with an annular protrusion matched with the annular groove, and the radial limiting and sealing effects can be achieved through the concave-convex connecting structure.

Further, a circular umbrella cover 2-1 is arranged on the outer side of the insulating shell 2, as shown in fig. 1 and 3, the circular umbrella cover 2-1 can be regarded as a cylindrical structure, an annular cavity is formed between the circular umbrella cover 2-1 and the insulating shell 2 on the outer side of the conductive column connecting end 1-2, the upper end of the terminal sealing gland 6 is positioned in the circular umbrella cover 2-1, and rainwater can be prevented from entering the wire clamp from the inner side of the terminal sealing gland 6.

Further, the nut 11 and the disc spring washer 10 are sleeved on the conductive column 12, the disc spring washer 10 is located between the upper end of the nut 11 and the lower end of the conductive terminal 1, after the conductive terminal 1 is installed, the nut 11 and the disc spring washer 10 apply elastic stress to the conductive column connecting end 1-2 reversely and compress the conductive terminal 1, when the wire clamp expands with heat and contracts with cold in operation, the disc spring washer 10 can play a role in stress compensation, connection stability of the wire clamp and the conductive column 12 is further effectively guaranteed, and meanwhile, the terminal sealing support 9 can be supported, so that the sealing effect of the insulating shielding cover 8 is more reliable.

In summary, according to the insulating wire clamp special for the transformer, the sealing joint 5 can seal the connection part of the lead 13 and the conductive terminal 1; the sealing of the compression bolt 4 on the side wall of the conductive terminal 1 can be realized through the sealing cover 3; the sealing of the connection of the conductive post 12 to the conductive terminal 1 can be achieved by the insulating shield 8. Through combining above-mentioned three seals, can realize the full seal to the fastener, when having promoted fastener security, reliability and stability, also improved the life of fastener under adverse circumstances.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The insulating wire clamp special for the transformer is described in detail. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims

1. The utility model provides a special insulating fastener of transformer which characterized in that includes: conductive terminal, insulating housing, compress tightly the piece, seal joint, conductive terminal's outside is equipped with insulating housing, conductive terminal includes wire link and conductive post link, be equipped with the cavity that is used for supplying the wire to penetrate in the wire link, compress tightly the piece and be used for with the wire compresses tightly on the inner wall of cavity, seal joint cover is established on the wire, and with the entrance sealing connection of cavity, conductive post link and the conductive post threaded connection of transformer.

2. The transformer specific insulation clip of claim 1, further comprising an insulation shield cover configured to cover a junction between the conductive post connection end and the conductive post.

3. The transformer specific insulation wire clamp according to claim 2, further comprising a terminal sealing support and a terminal sealing gland, wherein the terminal sealing support and the terminal sealing gland are respectively in threaded connection with the outer side of the insulating shell outside the connecting end of the conductive terminal conductive column, a connecting ring is arranged on the inner side of the upper end of the insulating shielding cover, the connecting ring is located between the terminal sealing support and the terminal sealing gland, and the terminal sealing support is located in the insulating shielding cover.

4. The transformer specific insulation wire clamp according to claim 3, wherein a circular umbrella cover is arranged on the outer side of the insulation shell, and the upper end of the terminal sealing gland is positioned in the circular umbrella cover.

5. The transformer specific insulation wire clamp according to claim 1, wherein the conductive post is sleeved with a nut and a disc-shaped spring washer, and the disc-shaped spring washer is located between the upper end of the nut and the lower end of the conductive terminal.

6. The transformer-dedicated insulating wire clamp according to claim 3, wherein a limiting portion is provided on the inner side of the terminal seal support bottom end, and the limiting portion is used for contacting with the lower end face of the insulating housing.

7. The transformer-dedicated insulating wire clamp according to claim 3, wherein the upper surface of the terminal sealing support is provided with an annular groove, and the lower end of the connecting ring is provided with an annular protrusion matched with the annular groove.

8. The transformer specific insulation wire clip of claim 3, wherein a gasket seal is provided between the terminal gland and the connecting ring.

9. The transformer specific insulation clip according to any one of claims 1 to 8, wherein an inner side wall of the cavity is provided with a tooth surface contacting an outer side wall of the wire.

10. The special insulating wire clamp for the transformer according to any one of claims 1 to 8, wherein the pressing piece is a pressing bolt, at least one threaded hole is formed in the side wall of the cavity, a plurality of threaded holes are distributed along the axis direction of the cavity, through holes corresponding to the threaded holes one by one are formed in the insulating housing, the aperture of each through hole is larger than that of each threaded hole, the pressing bolt penetrates through each through hole to be in threaded connection with the threaded hole in the conductive terminal, the conductive wire is pressed, and a sealing cover is buckled on each through hole.