CN219458602U - Bus structure and power transmission system - Google Patents

Abstract

The utility model relates to the technical field of power transmission and distribution of power systems, in particular to a bus structure and a power transmission system. The bus structure adopts a plurality of supporting pieces to separate a plurality of conductive pipes, wherein the plurality of conductive pipes are hollow pipes with different diameters, the plurality of hollow pipes are coaxially nested together in a laminated state, and a gap is reserved between every two adjacent conductive pipes; the supporting pieces are arranged in each gap along the axial direction of the conductive tube at intervals, and the two-layer gap and the supporting pieces are arranged so that a certain distance is kept between the conductive tubes and the conductive tubes can be mutually insulated through air. The coaxial nesting enables the multiphase magnetic fields of the plurality of conductive pipes to be in a balanced state relative to the stress of each conductive pipe, reduces vibration caused by alternating magnetic fields, thereby avoiding the faults of short circuit of the plurality of conductive pipes, improving the safety guarantee, prolonging the service life of the whole bus structure, and effectively solving the technical problem that the bus has larger short circuit risk due to larger interference vibration of the magnetic fields of the three-phase bus arranged on the plane.

Description

Bus structure and power transmission system

Technical Field

The utility model relates to the technical field of power transmission and distribution of power systems, in particular to a bus structure and a power transmission system.

Background

With the development of modern mechanical industry, the power consumption of various industries is increased, and the requirement of high-current transmission and power can not be met by the traditional power transmission cable. Bus bars are conductors of an electrical device in which current carrying branch circuits are connected together, and serve as carriers for collecting and distributing power, and often have large current passing therethrough during operation, so that the structure of the bus bars is critical.

The existing bus structure is in a tube shape, three phases are generally arranged on the same plane, the three-phase buses are respectively connected with independent insulating supports, alternating magnetic fields exist around the buses with current, the magnetic fields of the three-phase lines influence each other to generate vibration, the middle of the bus structure is compatible and easy to interfere with the vibration of two sides, the generated vibration is similar to the vibration of pushing each other to easily cause short circuit of the buses, huge electromotive force is generated in the moment of short circuit of the buses, the electromotive force can deform and damage the buses and the insulating supports to cause accidents, and potential safety hazards are large.

Disclosure of Invention

The utility model mainly aims to provide a bus structure, and aims to solve the technical problem that the bus has larger short circuit risk due to larger interference vibration of a magnetic field of a three-phase bus in the conventional planar arrangement.

In order to achieve the above object, the present utility model provides a bus structure, comprising:

the plurality of conductive pipes are hollow pipes with different diameters, and are coaxially and nested, and a gap is reserved between every two adjacent conductive pipes; and

and each gap is internally provided with at least one supporting piece so as to support two adjacent conductive pipes.

Optionally, a plurality of the supporting pieces are arranged in each gap;

the supporting pieces are distributed at intervals along the axial direction of the conductive tube; and/or a plurality of the supporting pieces are uniformly arranged along the axial direction of the conductive tube.

Alternatively, each of the two supporting members respectively located in the two gaps is distributed in a staggered manner in the axial direction of the conductive tube.

Optionally, the support member is an annular structure, and the support member is detachably connected with two adjacent conductive pipes.

Optionally, each supporting piece is provided with at least one through hole in a penetrating way, and the through holes are communicated with the gaps to form a heat dissipation channel.

Optionally, one of the supporting members is provided with three spaced through holes.

Optionally, the inner peripheral wall and/or the outer peripheral wall of each conductive tube is/are coated with an insulating layer.

Optionally, the inner peripheral wall and/or the outer peripheral wall of each conductive tube is/are coated with a shielding layer.

Optionally, the sectional areas of the three conductive pipes in the radial direction are equal;

and/or the support is an insulator;

and/or the supporting piece is made of rigid materials.

The utility model also provides a power transmission system comprising a busbar arrangement as defined in any one of the preceding claims.

According to the technical scheme, the plurality of conductive pipes are separated to form a bus structure by adopting the plurality of supporting pieces, the plurality of conductive pipes are hollow pipes with different diameters, the plurality of hollow pipes are coaxially nested together in a stacked state, and a gap is reserved between every two adjacent conductive pipes; the supporting pieces are arranged in each gap along the axial direction of the conductive tube at intervals, and the two-layer gap and the supporting pieces are arranged so that a certain distance is kept between the conductive tubes and the conductive tubes can be mutually insulated through air. The coaxial nesting enables the multiphase magnetic fields of the plurality of conductive pipes to be in a balanced state relative to the stress of each conductive pipe, reduces vibration caused by alternating magnetic fields, thereby avoiding the faults of short circuit of the plurality of conductive pipes, improving the safety guarantee, prolonging the service life of the whole bus structure, and effectively solving the technical problem that the bus has larger short circuit risk due to larger interference vibration of the magnetic fields of the three-phase bus arranged on the plane.

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 in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of an embodiment of a bus structure according to the present utility model;

FIG. 2 is a schematic top view of another embodiment of a bus bar structure according to the present utility model;

FIG. 3 is a schematic view of an axial cross-section of another embodiment of a bus structure according to the present utility model;

FIG. 4 is a schematic top view of a first connector according to another embodiment of the bus bar structure of the present utility model;

fig. 5 is a schematic top view of a second connector according to another embodiment of the bus bar structure of the present utility model.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Bus structure	30	Support member
10	Conductive tube	31	First connecting piece
				11	Aphase line	32	Second connecting piece
12	B-phase line	30A	Through hole
				13	C-phase line	30B	Annular hole
301	Inside of the ring	10B	Gap of
				302	Outside of the ring	10A	Hollow cavity
303	Connecting rib

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. 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.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

With the development of modern mechanical industry, the power consumption of various industries is increased, and the requirement of high-current transmission and power can not be met by the traditional power transmission cable. Bus bars are conductors of an electrical device in which current carrying branch circuits are connected together, and serve as carriers for collecting and distributing power, and often have large current passing therethrough during operation, so that the structure of the bus bar tube is critical.

In the existing bus tube structure, three phases are generally arranged on the same plane, alternating magnetic fields exist around a current-carrying bus, the magnetic fields of the three phase lines influence each other to generate vibration, the middle compatibility is easy to vibrate due to the interference of two sides, the generated vibration is similar to the vibration of mutual pushing to easily cause bus short circuit, huge electromotive force can be generated at the moment of bus short circuit, the electromotive force can deform and damage the bus and an insulating support to cause accidents, and potential safety hazards are large.

The present utility model proposes a busbar construction 100.

Referring to fig. 1 to 5, fig. 1 is a schematic perspective view of a bus bar structure 100 according to an embodiment of the present utility model; FIG. 2 is a schematic top view of another embodiment of a bus bar structure 100 according to the present utility model; FIG. 3 is a schematic axial cross-sectional view of another embodiment of a bus bar structure 100 according to the present utility model; fig. 4 is a schematic top view of a first connecting member 31 of another embodiment of a bus bar structure 100 according to the present utility model; fig. 5 is a schematic top view of a second connector 32 according to another embodiment of the bus bar structure 100 of the present utility model.

In an embodiment of the present utility model, the bus bar structure 100 includes a plurality of conductive tubes 10 and a plurality of supports 30; as shown in fig. 1 to 3, the plurality of conductive pipes 10 are hollow pipes with different diameters, and the plurality of hollow pipes are coaxially and nested, a gap 10B is provided between every two adjacent conductive pipes 10, and at least one supporting member 30 is provided in each gap 10B to support two adjacent conductive pipes 10.

The bus structure 100 according to the present utility model may be configured as a three-phase electrical structure, i.e. the conductive pipe 10 is provided with three. By adopting a plurality of supporting pieces 30 to space three conductive pipes 10 to form a bus structure 100, the three conductive pipes 10 are three hollow pipes with different diameters, the three hollow pipes are coaxially nested together, and a gap 10B is formed between every two adjacent conductive pipes 10; a plurality of supporting members 30 are provided in each of the gaps 10B along the axial direction of the conductive pipe 10 at intervals, and the two-layer gap 10B and the plurality of supporting members 30 are provided so as to maintain a certain distance between the three conductive pipes 10 and to be insulated from each other by air. The coaxial nesting enables the three-phase magnetic fields of the three conductive pipes 10 to be in a balanced state for the stress of each conductive pipe 10, and reduces vibration caused by alternating magnetic fields, so that the three conductive pipes 10 are prevented from being short-circuited, the safety guarantee is improved, the service life of the whole bus structure 100 is prolonged, and the technical problem that the bus is at great short-circuited risk due to the fact that the existing same plane is respectively provided with three-phase bus magnetic fields to interfere with vibration is effectively solved.

It can be understood that the stacked nesting of the three conductive pipes 10 not only has a better vibration-proof effect on the magnetic effect of the current, but also greatly saves the arrangement space on the structural layout of the three conductive pipes 10, and avoids the condition that the space is wasted due to the stable increase of the space between the horizontally arranged three phases of the existing bus.

Alternatively, the three conductive tubes 10 have equal sectional areas in the radial direction, so that the three conductive tubes 10 have a comparable current carrying capacity, and the overall space of the bus bar structure 100 can be effectively saved.

Optionally, a plurality of the supporting members 30 are disposed in each of the gaps 10B, and the plurality of supporting members 30 are spaced apart along the axial direction of the conductive tube 10.

In the present embodiment, two gaps 10B are formed between the three conductive pipes 10, respectively. Wherein, the three conductive pipes 10 are an a-phase line 11, a B-phase line 12 and a C-phase line 13, wherein the a-phase line 11 is the conductive pipe 10 with the smallest diameter, the diameters of the B-phase line 12 and the C-phase line 13 are sequentially increased, gaps 10B are respectively formed between the a-phase line 11 and the B-phase line 12, and between the B-phase line 12 and the C-phase line 13, and the intermediate phase B-phase line 12 is positioned between the two gaps 10B. Each gap 10B is internally provided with a plurality of supporting pieces 30, the plurality of supporting pieces 30 are distributed at intervals along the axial direction of the conductive tube 10, the interval stability between every two adjacent phase lines is enhanced by a plurality of interval arrangement of the supporting pieces 30, the stability of the gap 10B is improved, the insulation performance of the three phases through air insulation is stable, and the service life of the bus structure 100 is prolonged.

Optionally, the plurality of supporting members 30 are uniformly disposed along the axial direction of the conductive tubes 10, so that two conductive tubes 10 of the bus structure 100 are supported by one supporting member 30 along the axial direction at equal length distances, thereby improving the axial strength of the bus structure 100 and prolonging the length of a section of bus structure 100 as much as possible.

Alternatively, each of the two supporting pieces 30 respectively located in the two gaps 10B is distributed in a staggered manner in the axial direction of the conductive pipe 10.

In this embodiment, the supporting members 30 of the bus bar structure 100 located in different gaps 10B are not installed on the same plane, but are uniformly and mutually staggered in the axial direction of the conductive tubes 10, so as to uniformly distribute stress at the contact position of each conductive tube 10 and the supporting member 30, and improve the service life of the conductive tube 10.

Optionally, the supporting member 30 has a ring structure, and the supporting member 30 is detachably connected to two adjacent conductive pipes 10.

In this embodiment, an annular hole is formed in the annular middle of the supporting member 30, the plurality of supporting members 30 in the inner-layer gap 10B are respectively sleeved on the outer ring of the a-phase line 11, the inner side 301 of the plurality of supporting members 30 abuts against the a-phase line 11, and the outer side 302 of the ring abuts against the B-phase line 12. The plurality of supports 30 in the outer-layer gap 10B are respectively fitted over the outer ring of the B-phase line 12, the inner side 301 of the plurality of supports 30 abuts against the B-phase line 12, and the outer side 302 of the ring abuts against the C-phase line 13. The supporting member 30 may be slightly in interference fit with the conductive tubes 10, or may be fixed relative to the conductive tubes 10 by gluing, so as to support a gap 10B between every two adjacent conductive tubes 10, thereby improving air insulation strength.

Referring to fig. 4 and 5 in combination, at least one through hole 30A is formed through each supporting member 30, and the through holes 30A are all communicated with the gap 10B to form a heat dissipation channel.

In this embodiment, the hollow cavity 10A in the middle of the a-phase line 11 can blow air to form convection to dissipate heat. Wherein, at least one through hole 30A is formed in each supporting member 30, the through holes 30A are all communicated with the gaps 10B to form a heat dissipation channel, air can be blown into the heat dissipation channel to form convection so as to dissipate heat, and the heat dissipation channel and the hollow cavity 10A cooperate to take away heat caused by current transmission of each phase, so that the stability of the bus structure 100 in use is improved.

It is understood that the support members 30 located in the different gaps 10B may be identical in shape but different in size. The support member 30 located in the inner gap 10B is a first connection member 31, the support member 30 located in the outer gap 10B is a second connection member 32, and the second connection member 32 has a larger size than the first connection member 31, so that the assembly is facilitated.

Alternatively, one of the supporting members 30 is provided with three spaced through holes 30A. In this embodiment, three through holes 30A are arranged in a ring. In other embodiments, the support 30 may have more than three through holes 30A provided that the support strength is ensured.

In this embodiment, the supporting members 30 are a first connecting member 31 and a second connecting member 32 with different diameters, each supporting member 30 has a ring inner side 301 and a ring outer side 302 with different diameters, and each first connecting member 31 or each second connecting member 32 can be provided with three spaced through holes 30A, so that three connecting ribs 303 are formed between the ring inner side 301 and the ring outer side 302, and each two adjacent connecting ribs 303 are provided with through holes 30A for communicating with the gaps 10B to form a heat dissipation channel, thereby improving the heat dissipation efficiency of the bus structure 100 and prolonging the service life of the bus structure 100.

It will be appreciated that the provision of the through holes 30A can provide both a heat dissipation channel and a weight reduction, reducing the overall weight of the bus structure 100, facilitating assembly and overhead placement.

Optionally, the inner and/or outer peripheral wall of each of the conductive pipes 10 is coated with an insulating layer.

In this embodiment, the inner peripheral wall of each conductive tube 10 is coated with an insulating layer, or the outer peripheral wall of each conductive tube 10 is coated with an insulating layer, or the inner peripheral wall and the outer peripheral wall of each conductive tube 10 are coated with insulating layers, so as to improve the insulation reliability between two adjacent conductive tubes 10 and reduce the electrical breakdown phenomenon.

Optionally, the inner and/or outer circumferential wall of each of the conductive tubes 10 is coated with a shielding layer.

In this embodiment, the inner peripheral wall of each conductive tube 10 is coated with a shielding layer, or the outer peripheral wall of each conductive tube 10 is coated with a shielding layer, or both the inner peripheral wall and the outer peripheral wall of each conductive tube 10 are coated with a shielding layer. Wherein, insulating layer and shielding layer can wrap up on the electric conduction pipe 10 respectively, also can wrap up on the electric conduction pipe 10 simultaneously, promote the insulating reliability between two adjacent electric conduction pipes 10, reduce the electric breakdown phenomenon.

It can be appreciated that, on the conductive tube 10 coated with the insulating layer and/or the shielding layer, a limiting groove may be disposed on a surface of the insulating layer and/or the shielding layer, which contacts the supporting member 30, so as to limit the installation position of the supporting member 30, improve the installation strength and reliability of the supporting member 30, and enhance the structural reliability of the bus structure 100.

And/or, the supporting members 30 are insulators, and the supporting members 30 are uniformly and mutually staggered in the axial direction of the bus bar and are connected through insulating connecting members, so that a certain distance is kept between the phases of the bus bar structure 100, and the electric breakdown phenomenon is effectively reduced again.

And/or the support 30 is made of rigid material.

In this embodiment, the supporting member 30 is made of an insulating and rigid material, and the supporting member 30 is made of iron or a polymer material with high temperature resistance, so as to improve the supporting strength and insulation reliability between every two adjacent conductive tubes 10.

The utility model also provides a power transmission system, which comprises a power distribution main body and a bus structure 100, wherein the specific structure of the bus structure 100 refers to the embodiment, and the power transmission system adopts all the technical schemes of all the embodiments, so that the power transmission system at least has all the beneficial effects brought by the technical schemes of the embodiments, and the detailed description is omitted.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A bus bar structure, characterized in that the bus bar structure comprises:

the plurality of conductive pipes are hollow pipes with different diameters, and are coaxially and nested, and a gap is reserved between every two adjacent conductive pipes; and

and each gap is internally provided with at least one supporting piece so as to support two adjacent conductive pipes.

2. The bus bar structure of claim 1, wherein a plurality of said support members are disposed within each of said gaps;

the supporting pieces are distributed at intervals along the axial direction of the conductive tube; and/or a plurality of the supporting pieces are uniformly arranged along the axial direction of the conductive tube.

3. The bus bar structure of claim 1, wherein each two of the support members respectively located in the two gaps are arranged in a staggered manner in the axial direction of the conductive pipe.

4. The bus bar structure of claim 1, wherein the support member is a ring-shaped structure, the support member being detachably connected to both of the adjacent two of the conductive tubes.

5. The bus bar structure of claim 1, wherein each of the support members has at least one through hole therethrough, the through holes each communicating with the gap to form a heat dissipation channel.

6. The bus bar structure of claim 5 wherein one of the support members defines three spaced apart through holes.

7. The busbar construction of claim 1, wherein an inner peripheral wall and/or an outer peripheral wall of each of the conductive tubes is covered with an insulating layer.

8. The busbar construction of claim 1 wherein the inner and/or outer peripheral walls of each of the conductive tubes are coated with a shielding layer.

9. The bus bar structure according to any one of claims 1 to 8, wherein the three conductive pipes have equal sectional areas in the radial direction;

and/or the support is an insulator;

and/or the supporting piece is made of rigid materials.

10. An electric power transmission system, characterized in that it comprises a busbar arrangement according to any one of claims 1 to 9.