阅读说明：本技术 母线支撑绝缘子及开关柜 (Bus supporting insulator and switch cabinet ) 是由 张罗锐 康世荣 王爽 汪宁 陈利民 杜敬敬 王茜 于 2019-09-11 设计创作，主要内容包括：本发明涉及一种母线支撑绝缘子及开关柜,该母线支撑绝缘子包括：绝缘柱,一端用于固定装配在开关柜柜体上,另一端一体成型有两个绝缘护翼,两个绝缘护翼和绝缘柱围成供母线搭接结构安装的安装槽,两个绝缘护翼用于对母线搭接结构进行绝缘防护；嵌件,嵌设在安装槽的槽底上；所述嵌件为具有内螺纹的螺纹套,用于与螺纹紧固件配合将母线搭接结构固定装配在安装槽内,或者嵌件为具有外螺纹的螺杆,用于与螺母配合将母线搭接结构固定装配在安装槽内。两个绝缘护翼能够对安装槽内母线搭接结构起到绝缘防护的作用,保证两相之间的绝缘距离,绝缘柱能够对母线搭接结构起到支撑作用,同时螺纹紧固件或螺母不会外露,避免螺纹紧固件或螺母的放电现象。(The invention relates to a bus supporting insulator and a switch cabinet, wherein the bus supporting insulator comprises: the insulation column is used for fixedly assembling one end of the insulation column on the switch cabinet body, two insulation protective wings are integrally formed at the other end of the insulation column, the two insulation protective wings and the insulation column enclose a mounting groove for mounting a bus lapping structure, and the two insulation protective wings are used for insulating and protecting the bus lapping structure; the insert is embedded on the bottom of the mounting groove; the inserts are threaded sleeves with internal threads and are used for being matched with threaded fasteners to fixedly assemble the bus lap joint structure in the mounting groove, or the inserts are threaded rods with external threads and are used for being matched with nuts to fixedly assemble the bus lap joint structure in the mounting groove. Two insulating wings can play the effect of insulation protection to generating line overlap joint structure in the mounting groove, guarantee the insulating distance between the double-phase, and the insulated column can play the supporting role to generating line overlap joint structure, and threaded fastener or nut can not expose simultaneously, avoids the phenomenon of discharging of threaded fastener or nut.)

1. Busbar support insulator, its characterized in that includes:

the insulating column, one end is used for fixing and assembling on the body of the switch cabinet, another end has insulating wings relatively disposed integrally, insulating wing and insulating column relatively disposed enclose the mounting groove for bus lap joint structural installation, the insulating wing is used for insulating and protecting the bus lap joint structure;

the insert is embedded on the bottom of the mounting groove;

the inserts are threaded sleeves with internal threads and are used for being matched with threaded fasteners to fixedly assemble the bus lap joint structure in the mounting groove, or the inserts are threaded rods with external threads and are used for being matched with nuts to fixedly assemble the bus lap joint structure in the mounting groove.

2. The bus bar supporting insulator according to claim 1, wherein said insulating wings and said insulating posts form a U-shaped structure, and said mounting slots are U-shaped slots.

3. The bus bar support insulator according to claim 1 or 2, wherein the insert is a threaded sleeve having an internal thread, an upper end surface of the threaded sleeve is higher than a groove bottom of the mounting groove, and satisfies: the distance from the upper end surface of the threaded sleeve to the bottom of the mounting groove is larger than the thickness of the insulating layer on the bus.

4. The bus bar support insulator according to claim 3, wherein the distance from the upper end surface of said threaded sleeve to the bottom of the mounting groove is 4 ~ 6 mm.

5. The bus bar support insulator according to claim 1 or 2, wherein said insulating posts are cast from epoxy resin.

6. A switchgear, comprising:

a cabinet body;

the bus is arranged in the cabinet body and is provided with at least two sections, and the lap joint ends of two adjacent sections of buses form a bus lap joint structure;

it is characterized by also comprising:

the insulating column is fixedly assembled on the cabinet body at one end, insulating protective wings which are oppositely arranged are integrally formed at the other end, the insulating protective wings and the insulating column which are oppositely arranged enclose a mounting groove for mounting the bus lapping structure, and the insulating protective wings are used for insulating and protecting the bus lapping structure;

the insert is embedded on the bottom of the mounting groove;

the inserts are threaded sleeves with internal threads and are used for being matched with threaded fasteners to fixedly assemble the bus lap joint structure in the mounting groove, or the inserts are threaded rods with external threads and are used for being matched with nuts to fixedly assemble the bus lap joint structure in the mounting groove.

7. The switchgear cabinet as claimed in claim 6, wherein the said insulating wings and the insulating posts form a U-shaped structure, and the said mounting groove is a U-shaped groove.

8. The switch cabinet according to claim 6 or 7, characterized in that the insert is a threaded sleeve with an internal thread, the upper end surface of the threaded sleeve is higher than the bottom of the mounting groove, and the following conditions are satisfied: the distance from the upper end surface of the threaded sleeve to the bottom of the mounting groove is larger than the thickness of the insulating layer on the bus.

9. The switchgear cabinet according to claim 8, wherein the distance from the upper end face of the threaded sleeve to the bottom of the mounting groove is 4 ~ 6 mm.

10. The switchgear cabinet according to claim 6 or 7, wherein the insulating columns are made of epoxy resin by casting.

Technical Field

The invention relates to a bus supporting insulator and a switch cabinet.

Background

The main function of the switch cabinet is to open and close, control and protect electric equipment in the power generation, transmission, distribution and electric energy conversion processes of a power system. The circuit breaker can be divided into a movable switch cabinet and a fixed switch cabinet according to different installation modes of the circuit breaker. In an electric power system, an armored movable metal closed switch cabinet is widely used, and the switch cabinet is mostly composed of four compartments, namely a bus chamber, a breaker chamber, a cable chamber and an instrument chamber.

The chinese utility model patent with the grant publication number of CN202997405U discloses an armor removal type metal-enclosed switchgear, is equipped with the main bus in this switchgear's the cable chamber, because the main bus is longer, for the convenience of assembly, the main bus is formed by two sections bus overlap joints, and the overlap joint end of two sections buses passes through fastening bolt fixed connection, and the overlap joint end of two buses constitutes bus overlap joint structure.

Disclosure of Invention

The invention aims to provide a bus supporting insulator, which aims to solve the technical problems that insulation protection is realized at a bus lap joint structure in the prior art through a heat-shrinkable joint box, and the heat-shrinkable joint box is easy to generate an interphase discharge phenomenon due to aging after being used for a long time; the invention also aims to provide a switch cabinet, which aims to solve the technical problems that insulation protection is realized at a bus lapping structure in the prior art through a heat-shrinkable joint box, and the interphase discharge phenomenon is easy to occur due to aging after the heat-shrinkable joint box is used for a long time.

In order to achieve the purpose, the technical scheme of the bus supporting insulator is as follows:

a bus bar support insulator comprising: the insulating column, one end is used for fixing and assembling on the body of the switch cabinet, another end has insulating wings relatively disposed integrally, insulating wing and insulating column relatively disposed enclose the mounting groove for bus lap joint structural installation, the insulating wing is used for insulating and protecting the bus lap joint structure; the insert is embedded on the bottom of the mounting groove; the inserts are threaded sleeves with internal threads and are used for being matched with threaded fasteners to fixedly assemble the bus lap joint structure in the mounting groove, or the inserts are threaded rods with external threads and are used for being matched with nuts to fixedly assemble the bus lap joint structure in the mounting groove.

The beneficial effects are that: the insulating protective wings which are oppositely arranged are formed at one end of the insulating column, so that the insulating protective wings and the insulating column which are oppositely arranged enclose a mounting groove for mounting a bus lapping structure; the insulating protective wings can play an insulating protection role in a bus lapping structure in the mounting groove, so that the insulating distance between the two phases is ensured, and meanwhile, the insulating columns are generally supported by epoxy resin or ceramic, so that the insulating protective wings are not easy to age and have longer service life; the bottom of the mounting groove is embedded with the insert, the bus lapping structure is fixedly assembled in the mounting groove through the cooperation of the insert and the threaded fastener or the nut, the insulating column plays a supporting role in the bus lapping structure, meanwhile, the threaded fastener or the nut cannot be exposed, and the discharging phenomenon of the threaded fastener or the nut is avoided.

Furthermore, the insulation protective wing and the insulation column form a U-shaped structure, and the mounting groove is a U-shaped groove.

The beneficial effects are that: the insulating wings of the U-shaped structures which are arranged oppositely are parallel to each other, so that the insulating wings can be conveniently formed, and meanwhile, the insulating wings are thinner, so that the forming material can be saved.

Further, the inserts are thread sleeves with internal threads, the upper end faces of the thread sleeves are higher than the bottoms of the mounting grooves, and the requirements are met: the distance from the upper end surface of the threaded sleeve to the bottom of the mounting groove is larger than the thickness of the insulating layer on the bus.

The beneficial effects are that: after the bus is placed in the mounting groove, a gap is reserved between the insulating layer on the bus and the groove bottom of the mounting groove, and the bus can be firmly fastened on the insulating column.

Further, the distance from the upper end face of the threaded sleeve to the bottom of the mounting groove is 4 ~ 6 mm.

The bus bar mounting structure has the beneficial effects that the thickness of the insulating layer on the bus bar is generally 4mm, and the distance from the upper end surface of the threaded sleeve to the bottom of the mounting groove is designed to be 4 ~ 6mm, so that the bus bar can be firmly fastened on the insulating column, and the threaded sleeve cannot be protruded too much.

Further, the insulating column is made of epoxy resin in a pouring mode.

The beneficial effects are that: the epoxy resin is commonly used, has good insulating property, is not easy to age and has long service life.

In order to realize the purpose, the technical scheme of the switch cabinet is as follows:

the switch cabinet includes: a cabinet body; the bus is arranged in the cabinet body and is provided with at least two sections, and the lap joint ends of two adjacent sections of buses form a bus lap joint structure; further comprising: the insulating column is fixedly assembled on the cabinet body at one end, insulating protective wings which are oppositely arranged are integrally formed at the other end, the insulating protective wings and the insulating column which are oppositely arranged enclose a mounting groove for mounting the bus lapping structure, and the insulating protective wings are used for insulating and protecting the bus lapping structure; the insert is embedded on the bottom of the mounting groove; the inserts are threaded sleeves with internal threads and are used for being matched with threaded fasteners to fixedly assemble the bus lap joint structure in the mounting groove, or the inserts are threaded rods with external threads and are used for being matched with nuts to fixedly assemble the bus lap joint structure in the mounting groove.

The beneficial effects are that: the insulating protective wings which are oppositely arranged are formed at one end of the insulating column, so that the insulating protective wings and the insulating column which are oppositely arranged surround a mounting groove to mount a bus lapping structure; the insulating protective wings can play an insulating protection role in a bus lapping structure in the mounting groove, so that the insulating distance between the two phases is ensured, and meanwhile, the insulating columns are generally supported by epoxy resin or ceramic, so that the insulating protective wings are not easy to age and have longer service life; the bottom of the mounting groove is embedded with the insert, the bus lapping structure is fixedly assembled in the mounting groove through the cooperation of the insert and the threaded fastener or the nut, the insulating column plays a supporting role in the bus lapping structure, meanwhile, the threaded fastener or the nut cannot be exposed, and the discharging phenomenon of the threaded fastener or the nut is guaranteed.

Furthermore, the insulation protective wing and the insulation column form a U-shaped structure, and the mounting groove is a U-shaped groove.

The beneficial effects are that: the insulating wings of the U-shaped structures which are arranged oppositely are parallel to each other, so that the insulating wings can be conveniently formed, and meanwhile, the insulating wings are thinner, so that the forming material can be saved.

Further, the inserts are thread sleeves with internal threads, the upper end faces of the thread sleeves are higher than the bottoms of the mounting grooves, and the requirements are met: the distance from the upper end surface of the threaded sleeve to the bottom of the mounting groove is larger than the thickness of the insulating layer on the bus.

The beneficial effects are that: after the bus is placed in the mounting groove, a gap is reserved between the insulating layer on the bus and the groove bottom of the mounting groove, and the bus can be firmly fastened on the insulating column.

Further, the distance from the upper end face of the threaded sleeve to the bottom of the mounting groove is 4 ~ 6 mm.

The bus bar mounting structure has the beneficial effects that the thickness of the insulating layer on the bus bar is generally 4mm, and the distance from the upper end surface of the threaded sleeve to the bottom of the mounting groove is designed to be 4 ~ 6mm, so that the bus bar can be firmly fastened on the insulating column, and the threaded sleeve cannot be damaged due to too much protrusion.

Further, the insulating column is made of epoxy resin in a pouring mode.

The beneficial effects are that: the epoxy resin is commonly used and has better insulating property, so the epoxy resin is not easy to age and has longer service life.

Drawings

Fig. 1 is a schematic view of the structure of a bus bar support insulator of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is a schematic view of the bus bar support insulator mounting bus bar configuration of the present invention;

FIG. 4 is a cross-sectional view (without the cross-beam) of the right side view of FIG. 3;

in the figure: 11-an insulating column; 12-an insulating flap; 13-a first threaded sleeve; 14-a second threaded sleeve; 15-lower bus bar; 16-upper bus bar; 17-a fastening bolt; 18-a cross beam; 19-lap ends; and (20) installing the groove.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

The specific embodiment of the bus supporting insulator of the invention:

as shown in fig. 1 and 4, the bus bar supporting insulator includes an insulating column 11, the insulating column 11 is defined to extend along the front-back direction, a second threaded sleeve 14 is embedded at the rear end of the insulating column 11, and the insulating column 11 is fixedly assembled on a cross beam 18 of the switch cabinet body through the second threaded sleeve 14 and a fastening bolt; the front end integrated into one piece of insulated column 11 has two insulating wings 12, and two insulating wings 12 extend forward and the mutual disposition backward, and two insulating wings 12 enclose into mounting groove 20 with the tip of insulated column 11, and the notch of mounting groove 20 is forward to supply the installation of generating line overlap joint structure, two insulating wings 12 can play insulating protection's effect to generating line overlap joint structure in the mounting groove 20, guarantee the insulating distance between the double-phase. It should be noted that the busbar overlapping structure is an overlapping end of two adjacent busbars.

In this embodiment, the ends of the two insulating wings 12 and the insulating column 11 form a U-shaped structure, that is, the two insulating wings 12 are arranged in parallel to perform insulating protection on the bus bar overlapping structure in the mounting groove 20, the two insulating wings of the U-shaped structure are parallel to each other, which is convenient for the formation of the insulating wings, and the insulating wings are made thinner at the same time, so that the forming material can be saved, wherein the mounting groove 20 is a U-shaped groove. In other embodiments, in order to insulate and protect the bus bar overlapping structure, the two insulating wings may not be parallel, such as a necking type or a bell mouth type, and the two insulating wings are inconvenient to process; or at the tip direct forming mounting groove of insulated column, the diameter that requires insulated column this moment will satisfy greatly to place generating line overlap joint structure, the whole size that causes insulated column this moment is great, extravagant molding material. It should be noted that the base connecting the two insulating wings 12 is the same length as the insulating wings 12.

In this embodiment, as shown in fig. 2 and 4, the insulating column 11 is provided with the first thread bushing 13, the first thread bushing 13 forms an insert, the first thread bushing 13 has an internal thread, the first thread bushing 13 is embedded in the bottom of the mounting groove 20 to cooperate with the fastening bolt 17 to fixedly assemble the bus bar overlapping structure in the mounting groove 20, so that the insulating column supports the bus bar overlapping structure, the first thread bushing 13 is embedded in the bottom of the mounting groove 20, after the fastening bolt 17 cooperates with the first thread bushing 13, the bus bar overlapping structure is not exposed to the outside, and the tip discharge of the fastening bolt 17 is avoided. In other embodiments, in order to fix the busbar overlapping structure in the mounting groove, the insert may be a screw rod with external threads to match with a nut to fix the busbar overlapping structure in the mounting groove, and at this time, the screw rod needs to extend out of the groove bottom by a longer distance.

As shown in fig. 2 and 4, the upper end surface of the first threaded sleeve 13 is higher than the bottom of the mounting groove 20, and the distance from the upper end surface of the first threaded sleeve 13 to the bottom of the mounting groove 20 is greater than the thickness of the insulating layer on the bus bar, so that after the bus bar is mounted on the insulating column 11, a gap is still left between the insulating layer of the bus bar and the bottom of the mounting groove 20, and the bus bar can be firmly fastened on the insulating column 11. In other embodiments, the distance from the upper end surface of the second threaded sleeve to the bottom of the mounting groove is equal to the thickness of the insulating layer on the bus bar, or the distance from the upper end surface of the second threaded sleeve to the bottom of the mounting groove is smaller than the thickness of the insulating layer on the bus bar, at this time, when the fastening bolt 17 fixes the bus bar overlapping structure in the mounting groove, the insulating layer is deformed, so as to ensure that the bus bar can be firmly fastened on the insulating column.

Since the thickness of the insulation layer on the bus bar is generally 4mm, in the present embodiment, the distance from the upper end surface of the first thread bushing 13 to the bottom of the mounting groove 20 is designed to be 4 ~ 6mm, which can ensure that the bus bar can be firmly fastened to the insulation column 11 and also does not cause the first thread bushing 13 to protrude too much, in other embodiments, the distance from the upper end surface of the second thread bushing to the bottom of the mounting groove may be designed to be less than 4mm, or the distance from the upper end surface of the first thread bushing 13 to the bottom of the mounting groove may be designed to be greater than 6 mm.

In this embodiment, the insulating column 11 is made of epoxy resin by casting, and the two insulating wings 12 and the insulating column 11 are integrally cast, so that the epoxy resin is commonly used, has good insulating property, is not easy to age, and has a long service life. In other embodiments, to ensure the insulating property and the service life of the insulating column, the insulating column may be made of ceramic instead of epoxy.

It should be noted that the number of the first thread bushings 13 can be set according to the area of the bottom of the mounting groove 20, and the width of the mounting groove 20 can be adjusted according to the width of the bus bar to adapt to bus bars with different widths. The upper bus bar 16 and the lower bus bar 15 are coated with insulating layers in a fluidized manner except for the overlapping end 19, the upper bus bar 16 and the lower bus bar 15 are in conductive communication through the overlapping end 19, and the overlapping end 19 of the two bus bars forms a bus bar overlapping structure.

Because the bus supporting insulator is mainly used in a 40.5kV switch cabinet, the overall height of the insulating column 11 and the design of the umbrella skirt on the insulating column meet requirements, and the bus supporting insulator can also be applied to switch cabinets of other voltage classes, and the structure of the insulating column needs adaptive change.