WO2020156082A1

WO2020156082A1 - High heat dissipating bus duct and bus duct connector structure

Info

Publication number: WO2020156082A1
Application number: PCT/CN2020/071058
Authority: WO
Inventors: 王署斌; 蒋文功; 王杰
Original assignee: 威腾电气集团股份有限公司
Priority date: 2019-01-29
Filing date: 2020-01-09
Publication date: 2020-08-06

Abstract

The present invention relates to an electrical power transmission and distribution device, and relates to a high heat dissipating bus duct and a bus duct connector structure. The high heat dissipating bus duct comprises a housing for which the cross section of an inner cavity is narrow at an upper half and wide at a lower half, and comprises a cover plate installed at a bottom opening of the housing; the inner cavity of the upper half of the housing is divided at the middle into a left and a right accommodating cavity, the left and right cavity each accommodating one U-shaped upper insulator; two U-shaped lower insulators that abuttingly press against the edge of the housing are disposed in the inner cavity of the lower half of the housing; U-shaped accommodating grooves used for accommodating U-shaped conductors are formed within both the upper insulators and the lower insulators; a plurality of insulating supports that are longitudinally arranged along the housing are mounted on the cover plate, and each insulating support may support at a lower end of each phase of the conductor. The high heat dissipating bus duct according to the present invention has a reliable connection, has good heat-dissipating performance, and is convenient to install.

Description

High heat dissipation bus duct and bus duct joint structure

Technical field

The invention belongs to power transmission and distribution equipment, and relates to a high heat dissipation bus slot and a bus slot joint structure.

Background technique

The busway is an important power transmission equipment in the power system. The existing intensive busway usually includes a shell and a multi-phase conductor covered by an insulating material provided in the shell. The existing busway or busway joint structure of this kind, due to the long heat conduction path between the conductor or transition conductor and the shell, and the small heat conduction area, the overall heat dissipation capacity during use is poor; in addition, the shell of the busway The integrated design of the body and the conductor makes the installation troublesome, the conductive connection is unreliable, and the manufacturing cost is also high.

Summary of the invention

The technical problem to be solved by the present invention is to provide a high heat dissipation bus slot and bus slot joint structure with reliable connection, good heat dissipation performance and convenient installation.

In order to solve the above technical problems, the high heat dissipation bus duct of the present invention includes a casing with a narrow upper half and a wider lower half of the inner cavity section (ie a casing with a "convex" cross-sectional structure) and an opening at the bottom of the casing The inner cavity of the upper half of the shell is divided into two cavities on the left and right from the middle. A U-shaped upper insulator is installed in the two cavities on the left and right, and the inner cavity of the lower half of the shell is installed There are two U-shaped lower insulators pressed against the edge of the shell. Both the upper insulator and the lower insulator are formed with U-shaped placement grooves for arranging U-shaped conductors. The cover is installed along the longitudinal direction of the shell. A plurality of insulating supports, each insulating support can be supported at the lower end of each phase conductor.

The size of the shell in the length direction of the bus duct is equal to the upper and lower insulators, and the size of the U-shaped conductor in the length direction of the bus duct is smaller than that of the upper and lower insulators, so as to meet the requirement of creepage distance to the ground.

The upper half of the shell has two plates extending from the top to the lower part of the cavity to form a U-shaped slot between the left and right cavities, and a U-shaped ground is arranged in the U-shaped slot. conductor.

The inner side wall of the lower insulating member is provided with a supporting block, and the lower end of the outer side wall of the upper insulating member is supported on the supporting block.

The insulating support includes a lower support frame and a support arm provided on the lower support frame.

One side wall in the U-shaped placement groove of the upper and lower insulators is provided with a protrusion, and the outer side surface of the U-shaped conductor of each phase is in full-surface contact with the side wall of the U-shaped placement groove so that each The U-shaped conductors of each phase can directly dissipate heat through the housing, and the other side surface of the U-shaped conductor of each phase is pressed against the protrusion on the side wall of the U-shaped seating groove.

The cover plate is provided with a pair of support hooks located in the housing, and the bottom edge of the lower support frame is provided with hooks matched with the support hooks.

The outer side of the top of the shell is provided with a top dovetail groove in the middle.

Both sides of the lower part of the housing are provided with bottom dovetail grooves, and the cover plate is installed in cooperation with the housing through the bottom dovetail grooves.

A heat dissipation tooth is arranged outside the housing.

A busway joint structure of the present invention includes two sections of high heat dissipation busway of the above-mentioned structure to be butted and a plug structure for connecting the two sections of high heat dissipation busway; the plug structure includes an insulator and is located on the insulator And embedded in the positioning slot of the multi-phase plug-in conductor, the two ends of the plug-in conductor extend out of the front end surface of the insulator and are plug-connected with the U-shaped conductor or the grounding conductor in the two sections of high heat dissipation bus groove.

The top, bottom and both sides of the insulator are closed by the joint housing.

The two side surfaces of the plug-in conductor are provided with strap contact fingers for plug-fitting with U-shaped conductors or grounding conductors in two sections of high heat dissipation bus grooves.

Another busway joint structure of the present invention includes two sections of busway to be butted and a plug-in structure for cooperating installation of the busway to be butted. Both sections of busway are provided with m-shaped insulators. U-shaped conductor, the plug-in structure includes a joint insulation bracket arranged with support arms and a plug-in conductor supported by the joint insulation bracket; the bottom of the joint insulation bracket is provided for supporting and enclosing the joint insulation bracket in the two-section bus duct The bottom plate in the cavity, the periphery of the two sections of busway is also provided with a top plate for installing on the top of the two sections of busway and side plates for installing on the two outer sides of the two sections of busway. The bottom plate, side plate and top plate are The joints of the two-section busway are closed. The two side surfaces of the plug-in conductor are provided with strap contact fingers for plug-fitting with the U-shaped conductor in the two-section busway. The plug-in conductor can be inserted into the two sections. In the inner cavity of the corresponding U-shaped conductor in the bus duct, the strap contact fingers are pressed into contact with the U-shaped conductor.

A pair of flanges located in the inner cavity of the bus duct are provided on the bottom plate as slots for arranging the joint insulation support, and both sides of the joint insulation support are inserted into the slots.

Both sides of the bottom plate are provided with flanges capable of closing the bottom of the two sections of the bus duct.

Four-phase U-shaped conductors and a grounding conductor with a U-shaped structure for one phase are arranged in the two sections of bus ducts, and five plug-in conductors are provided and inserted into the cavities of the U-shaped conductor and the grounding conductor, respectively .

The strap contact fingers have an arched cross-sectional structure with a convex middle.

In the busway structure of the present invention, the upper insulator of the two-phase U-shaped conductor is installed in the inner cavity of the upper half of the shell and the two two-phase U-shaped conductors are installed in the inner cavity of the lower half of the shell. A plurality of insulating brackets arranged along the longitudinal direction of the shell are installed on the lower insulator of the phase U-shaped conductor and the cover plate, so that the four-phase U-shaped conductor is directly pressed against the side wall of the shell through the insulator. The conductors can directly dissipate heat to the outside, thereby greatly improving the heat dissipation capacity. The additional convex structure also ensures stable force and improves the reliability of the connection. Furthermore, the overall structure design is reasonable, the connection and installation are simple, and the plug The connection is convenient and the electrical conductivity is very reliable. The busway joint structure of the present invention can conveniently connect the busway using U-shaped conductors, and the plug-in conductor is provided with strap contact fingers for plug-fitting with the U-shaped conductors in the two-section busway. Stable and reliable connection, good sealing, high safety and no need to use insulating partitions, good heat dissipation, greatly expanding the scope of application; in addition, the use of strap contact fingers not only makes the conductive contact stable and reliable, and has good conductivity, but also can be used The arched structure of the contact fingers of the watchband realizes the tight connection of the plug-in part of the conductor, which makes the connection strong and durable.

Description of the drawings

FIG. 1 is a schematic cross-sectional structure diagram of a high heat dissipation busbar structure in Embodiment 1 of the present invention;

2 is a schematic cross-sectional structure diagram of the high heat dissipation busbar structure of the second embodiment of the present invention;

3 is a schematic diagram of the U-shaped conductor structure of the second embodiment of the present invention;

4 is a schematic diagram of the ground conductor structure of the second embodiment of the present invention;

Figure 5 is a schematic structural diagram of Embodiment 3 of the present invention;

6 is a schematic diagram of the plug-in structure of the third embodiment of the present invention;

Fig. 7 is a schematic cross-sectional view of a plug-in conductor according to a third embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an exploded state of the busbar joint connection structure (with the side plate removed) according to the fourth embodiment of the present invention;

9 is a structural schematic diagram of the installation state of the busbar joint connection structure (with the side plate removed) according to the fourth embodiment of the present invention;

Fig. 10 is a schematic view of the A-A cross-sectional structure of Fig. 9.

detailed description

The high heat dissipation busbar structure of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

Embodiment 1: A high heat dissipation bus duct.

As shown in Figure 1, the high heat dissipation busway structure of this embodiment includes a housing 1 with a narrow upper half and a wider lower half of the inner cavity cross section, and a cover plate 2 installed at the bottom opening of the housing; 1 has a U-shaped slot 7 formed by two plates extending from the top to the lower part of the cavity. A grounding conductor 8 is arranged in the U-shaped slot 7 and the upper half of the housing 1 is separated from the cavity by the U-shaped slot 7 The middle part is divided into two cavities on the left and right. A U-shaped upper insulator 3 is arranged in the left and right cavities. In the lower half of the housing 1 there are two U-shaped cavities pressing against the edges of the housing. The lower insulating member 4, the upper insulating member 3 and the lower insulating member 4 are all formed with U-shaped positioning grooves for positioning the U-shaped conductor 5, that is to say, four U-shaped positioning grooves are formed in the upper insulating member 3 and the lower insulating member 4. The U-shaped placement grooves of the shaped conductor 5, the upper left and right two and the lower left and right U-shaped placement grooves respectively fix L1, L2, L3 and N four-phase U-shaped conductor 5, the middle U-shaped slot 7 fixes the PE phase grounding conductor In other words, the U-shaped conductors 5 of each phase are separated from the shell by the upper insulator 3 and the lower insulator 4; the cover plate 2 is equipped with a plurality of insulating brackets 6 arranged in the longitudinal direction of the shell, each insulating bracket 6 It can be supported at the lower end of each phase conductor (including U-shaped conductors and grounding conductors). The distance between adjacent insulating supports 6 ranges from 50 to 3000 mm, which mainly depends on different amperages and the length of the busbar; the ground wire PE Direct contact with the shell to provide grounding protection.

Since the lower insulating member 4 and the upper insulating member 3 are both arranged in a U-shaped structure, they must both form two side walls. The one on the outside is called the outer side wall, and the one on the inside is called the inner side wall. The inner side wall of the member 4 is provided with a support block 9, and the lower end of the outer side wall of the upper insulating member 3 is supported on the support block 9. The insulating support 6 includes a lower support frame 16 and a support arm 10 provided on the lower support frame. The arm 10 is located in the middle part of the support frame, just below the U-shaped conductor 5 in the two upper insulators 3, the bottom of the inner side wall of the lower insulator 4 and the bottom of the inner side wall of the U-shaped conductor 5 in the lower insulator 4 Both ends are supported on the lower support frame 16, and the bottom end of the U-shaped conductor 5 in the upper insulator 3 is supported on the top end of the support arm 10. The outer side walls of the L1, L2, L3, and N four-phase U-shaped conductors 5 are in planar contact with the outer side walls of the upper insulator 3 or the lower insulator 4, and the outer side walls of the upper insulator 3 or the lower insulator 4 are in direct contact with the housing. Contact to achieve a larger heat dissipation surface and a higher heat conduction and heat dissipation speed; and the inner surface of the inner side wall of the upper insulating member 3 or the lower insulating member 4 is provided with protrusions 11, and the protrusions 11 are arranged from top to bottom The four-phase U-shaped conductors are arranged in multiple and the height is sequentially reduced, thereby achieving line contact between the outer surface of the inner side wall of the four-phase U-shaped conductor and the inner surface of the inner side wall of the upper insulating member 3 or the lower insulating member 4 to improve the reliability of the mating connection and ensure The phase U-shaped conductor 4 has suitable elasticity and conductive contact pressure when plugged into the joint conductor.

The cover plate 2 is provided with a pair of support hooks 12 located in the housing, the bottom edge of the lower support frame is provided with hooks 13 that cooperate with the support hooks, and the top outside of the housing 1 is provided with a top dovetail groove in the middle. 14. It is convenient for hoisting and joint connection. The lower two sides of the housing 1 are provided with bottom dovetail grooves 15, and the cover plate 2 is installed in cooperation with the housing 1 through the bottom dovetail groove, which is convenient to fix the cover plate. In addition, the housing is made of aluminum alloy. , The shape can be added or not added to the design of the heat dissipation teeth, further increasing the heat dissipation effect.

Embodiment 2: A high heat dissipation bus duct.

As shown in Figures 2 to 4, the difference between the high heat dissipation busway structure of this embodiment and the first embodiment includes: heat dissipation teeth are provided outside the housing; the outer side wall and the inner side wall of the U-shaped conductor 5 are two parts connected by The piece 18 is fixedly connected, and the thickness of the outer side wall is greater than the thickness of the inner side wall; the two side walls of the ground conductor 8 are also composed of two parts connected to each other; the insulating support is composed of a base 17 of an integrated structure and a plurality of support arms 10, Each support arm is supported on the lower end of the U-shaped conductor and the grounding conductor of each phase, and the two sides of the bottom of the base are plugged and connected with the cover through the protrusions.

The third embodiment: a busbar connection structure for connecting the high heat dissipation busbar of the first or second embodiment.

As shown in FIG. 5, this embodiment includes two sections of high heat dissipation bus duct B1 of the above-mentioned structure to be butted and a plug structure B2 for connecting two sections of high heat dissipation bus duct; as shown in FIG. 6, the plug structure includes one The insulator B3 and the positioning slot B5 on the insulator and embedded with the multi-phase plug-in conductor B4. The two ends of the plug-in conductor extend out of the front and rear faces of the insulator and are connected to the U-shaped conductor 5 or The grounding conductor 8 is plug-connected. The top, bottom and both sides of the insulator B3 are enclosed by the joint housing B6. As shown in Figure 7, the two side surfaces of the plug-in conductor B4 are provided with strap contact fingers B5 for plug-fitting with the U-shaped conductors or grounding conductors in the two sections of high heat dissipation bus duct.

The fourth embodiment: a busbar connection structure.

As shown in Figures 8-10, the busway joint connection structure of the present invention includes two busway sections A1 to be docked and a plug-in structure A2 for cooperating installation of the busway sections to be docked. A U-shaped conductor 5 installed through an M-shaped insulator is provided. A four-phase U-shaped conductor 5 and a grounding conductor 8 of the same U-shaped structure are arranged in the busbar. The grounding conductor is located between the two m-shaped insulators. The plug-in structure A2 includes a joint insulation bracket A4 arranged with supporting arms and a plug-in conductor A8 supported by the insulation bracket. As can be seen from the figure, each joint insulation bracket A4 The support arm and the joint insulation support where it is located are an integral structure. Of course, even the support arm on each insulation support A4 and the joint insulation support A4 where it is located can also be set as a split structure; the bottom of the joint insulation support A4 is provided with The joint insulation bracket A4 supports the bottom plate A5 enclosed in the inner cavity of the two bus ducts A1. The outer periphery of the two bus ducts A1 to be butted is also provided with a top plate A6 for installation on the top of the two bus ducts and for installation in the two bus ducts. The two outer side plates A7, bottom plate A5, side plate A7 and top plate A6 of the bus duct close the joints of the two bus ducts A1. There is a gap of 1-30mm between the two bus ducts to avoid thermal expansion and cold As a result of shrinkage, the joint insulation bracket A4 is placed on the bottom plate A5, and the two side surfaces of each plug-in conductor A8 are provided with strap contact fingers A9 for mating with the U-shaped conductor 5 in the two-section busway. , Each strap contact finger A9 has an arched cross-section structure with a convex middle. It can be seen from Figure 10 that the middle of the strap contact finger A9 is the highest point of the arch, and the height is gradually reduced to both sides. Each plug-in conductor A8 can be inserted into the corresponding U-shaped conductor in the two busbars. The strap contact finger A9 is in tight contact with the corresponding U-shaped conductor 5 in the cavity. It can be seen from FIG. 10 that there are five plug-in conductors A8 and they are respectively plugged into the inner cavities of the U-shaped conductor 5 and the grounding conductor 8. This structural design makes the busway conductors connect with the plug-in conductors.

The bottom plate A5 is provided with a pair of flanges located in the inner cavity of the bus duct A1 as slots for installing the joint insulation bracket A4. The two sides of the joint insulation bracket A4 are inserted into the slots, and both sides of the bottom plate A5 have upward bending The flanging of the bottom plate A5 can close the bottom of the two-section bus duct from the outside.

Claims

A high heat dissipation busway, which is characterized in that it comprises a casing (1) with a narrow upper part and a wider lower half of the inner cavity cross section, and a cover plate (2) installed at the bottom opening of the casing. ) The upper half of the inner cavity is divided from the middle into two left and right cavities. A U-shaped upper insulator (3) is arranged in the left and right cavities. The lower half of the housing (1) is provided with Two U-shaped lower insulators (4) pressed against the edge of the shell, the upper insulator (3) and the lower insulator (4) are both formed with U-shaped placement grooves for placing the U-shaped conductor (5), A plurality of insulating brackets (6) arranged in the longitudinal direction of the shell are installed on the cover plate (2), and each insulating bracket (6) can be supported at the lower end of each phase conductor.
The high heat dissipation busway according to claim 1, characterized in that: the middle of the upper half of the shell (1) has two plates extending from the top to the bottom of the cavity to form a space between the left and right installation cavities. A U-shaped card slot (7) is provided, and a U-shaped ground conductor (8) is arranged in the U-shaped card slot (7).
The high heat dissipation bus duct according to claim 1 or 2, characterized in that: the inner side wall of the lower insulating member (4) is provided with a supporting block (9), and the lower end of the outer side wall of the upper insulating member (3) supports On the support block (9).
The high heat dissipation busway according to claim 3, characterized in that the insulating support (6) comprises a lower support frame (16) and a support arm (10) provided on the lower support frame.
The high heat dissipation bus duct according to claim 1 or 2, characterized in that: one side wall in the U-shaped placement groove of the upper insulating member (3) and the lower insulating member (4) is provided with a protrusion (11 ), the outer side surface of the U-shaped conductor (4) of each phase is in full-surface contact with the side wall of the U-shaped placement groove, and the other side surface of the U-shaped conductor (4) of each phase is pressed against the U-shaped placement groove On the protrusions of the side walls.
The high heat dissipation bus duct structure according to claim 5, characterized in that: the cover plate (2) is provided with a pair of support hooks (12) in the housing, and the bottom edge of the lower support frame is provided with A hook (13) for supporting the hook.
The high heat dissipation busway structure according to claim 1, characterized in that: the outer side wall and the inner side wall of the U-shaped conductor (5) are two parts, which are fixedly connected by a connector (18), and the thickness of the outer side wall is greater than or Equal to the thickness of the inner wall.
The high heat dissipation bus duct structure according to claim 1, characterized in that: the size of the casing (1) in the length direction of the bus duct is equal to the upper and lower insulators (3, 4), and the U-shaped conductor (5) The size in the length direction of the bus duct is smaller than the upper and lower insulators (3, 4).
A busway joint structure, which is characterized in that it includes two sections of busway (A1) to be butted and a plug-in structure for cooperating and installing the busway to be butted. Both sections of the busway are provided with m-shaped The U-shaped conductor (5) installed by the insulator. The plug-in structure includes a joint insulation support (A4) arranged with support arms and a plug conductor (A8) supported by the joint insulation support; the joint insulation support (A4) The bottom is provided with a bottom plate (A5) for supporting and enclosing the joint insulation bracket (A4) in the inner cavity of the two-section busway (A1), and the outer periphery of the two-section busway (A1) is also provided for installation in the two-section busway The top plate (A6) at the top and the side plates (A7) for installing on the two outer sides of the two-section busway. The bottom plate (A5), side plates (A7) and top plate (A6) connect the two-section busway (A1) The joints of the plug-in conductor (A8) are closed, and the two side surfaces of the plug-in conductor (A8) are provided with strap contact fingers (A9) for plug-fitting with the U-shaped conductors in the two-section busway. The plug-in conductor (A8) It can be inserted into the inner cavity of the corresponding U-shaped conductor in the two busbars and make the strap contact finger (A9) and the U-shaped conductor press-contact.
The busway joint structure according to claim 9, characterized in that: the bottom plate (A5) is provided with a pair of flanges located in the inner cavity of the busway (A1) as inserts for installing the joint insulation bracket (A4) Slot, both sides of the connector insulation bracket (A4) are inserted into the slot.
The busway joint structure according to claim 9 or 10, characterized in that: both sides of the bottom plate (A5) have flanges capable of closing the bottom of the two sections of the busway.
The busway joint structure according to claim 9, wherein the strap contact finger (A9) has an arched cross-sectional structure with a convex middle.
A busway joint structure, characterized in that it comprises two sections of high heat dissipation busway (B1) of the above-mentioned structure to be butted and an insertion structure (B2) for connecting two sections of high heat dissipation busway; said plug structure It includes an insulator (B3) and a positioning slot (B5) on the insulator and embedded with a multi-phase plug-in conductor (B4). The two ends of the plug-in conductor (B4) protrude from the front and rear faces of the insulator and connect with the two The U-shaped conductor (5) or the grounding conductor (8) in the section high heat dissipation bus duct is plug-connected.
The busway joint structure according to claim 13, characterized in that the top, bottom and both sides of the insulator (B3) are enclosed by a joint housing (B6).
The busway joint structure according to claim 13, characterized in that: two side surfaces of the plug-in conductor (B4) are provided with U-shaped conductors (5) or grounding conductors (8) in the two sections of high heat dissipation busway. ) Plug and match the strap contact fingers (B5).