Low-voltage tubular bus duct
By designing low-voltage tubular bus ducts, and using sheet-shaped phase conductors and insulated support to form a tubular structure, the problems of inconvenient installation and short life of dense bus ducts are solved, and the effects of compact structure, convenient installation, long life and low cost are achieved.
Patent Information
- Application Number
- CN202420367062.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-02-27
AI Technical Summary
The existing dense bus ducts are inconvenient to install, have short service life and low production efficiency during high current transmission.
A low-pressure tubular bus trough is designed to form a tubular structure through splicing of sheet-shaped phase conductors and insulating support. It has a compact structure, convenient installation, long life and low cost.
A more compact structure, more flexible installation, longer service life and lower cost are achieved, while avoiding the problem of heat dissipation caused by conductor stacking.
Smart Images
Figure CN222601978U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power distribution, and more specifically to a low-voltage tubular bus duct. Background Art
[0002] With the emergence of high-rise buildings and large workshops and factories, traditional cables can no longer meet the needs of large current transmission, and bus ducts have emerged as a new type of distribution conductor.
[0003] Currently, bus ducts are mainly concentrated bus ducts. In the concentrated bus duct, the conductive bars are arranged in parallel, and an insulating layer is provided between two adjacent conductive bars. The more conductive bars there are, the greater the current allowed to pass through the concentrated bus duct, and the larger the space occupied by the concentrated bus duct. In addition, bus ducts with multiple conductive bars and high current are difficult to install on site.
[0004] Since the dense bus duct adopts a sandwich structure, the heat dissipation capacity of the middle part of the dense bus duct is poor, which makes the temperature of the middle conductor higher than the temperature of the conductors on both sides during operation, resulting in rapid aging of the insulation of the middle conductor and a short service life.
[0005] In addition, the production of dense bus duct is currently mainly manual, with low production efficiency.
[0006] In summary, how to provide a bus duct that is easy to install and has a long service life is an urgent problem to be solved by those skilled in the art. Utility Model Content
[0007] In view of this, the purpose of the utility model is to provide a low-voltage tubular bus duct, in which sheet-shaped phase conductors pass through insulating supports, and the structure is compact, the installation is convenient, the service life is long and the cost is low.
[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0009] A low-voltage tubular bus duct is used in a low-voltage bus duct system, comprising at least three sheet-like phase line conductors, an insulating support is provided between two adjacent sheet-like phase line conductors, the sheet-like phase line conductors are clamped in the conductor mounting groove of the insulating support to form a tubular structure, and the tubular structure is provided with a PE wire and an insulating protective layer in sequence from the inside to the outside.
[0010] Preferably, the tubular structure has at least four sheet-shaped phase line conductors evenly distributed along the circumferential direction, and any of the sheet-shaped phase line conductors is an N-phase conductor.
[0011] Preferably, a coaxially arranged N-phase insulating tube is provided in the tubular structure, an N-phase conductor is sleeved in the N-phase insulating tube, and the insulating supports are all insulated and connected to the outer wall surface of the N-phase insulating tube.
[0012] Preferably, the insulating support and the N-phase insulating tube are an integral structure.
[0013] Preferably, a conductor insulating layer is provided on the surface of the sheet-shaped phase line conductor, and both ends of the sheet-shaped phase line conductor are provided with a tin-plated layer or a silver-plated layer.
[0014] Preferably, the conductor insulation layer includes a fluidized insulation layer and a heat shrinkable insulation layer.
[0015] Preferably, the PE wire is wound around the outer circumference of the tubular structure to form a PE wire layer.
[0016] Preferably, the insulating protective layer comprises a steel belt layer and a heat-shrinkable wear-resistant protective sleeve, the steel belt layer is wound around the outside of the PE line, and the heat-shrinkable wear-resistant protective sleeve is sleeved outside the steel belt layer.
[0017] The low-voltage tubular bus duct provided by the utility model has a tubular structure formed by splicing a plurality of sheet-shaped phase line conductors through insulating support members, and the current level can be adjusted by changing the thickness of the sheet-shaped phase line conductors. Compared with the existing rectangular intensive bus duct, the structure is more compact, the space occupied is smaller, the installation is more flexible and convenient, the cost is lower, the span is larger, and the application scenarios are more extensive;
[0018] The tubular layout of the sheet-like phase line conductors increases the heat dissipation area of the bus duct, avoids the problems of poor heat dissipation and high temperature of the middle conductor caused by parallel stacking of conductors, slows down the aging rate of insulating supports, and significantly improves the service life of the bus duct. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0020] Figure 1 A schematic structural diagram of a specific embodiment 1 of the low-voltage tubular bus duct provided by the utility model;
[0021] Figure 2 for Figure 1 A schematic diagram of the main view;
[0022] Figure 3 for Figure 1 A cross-sectional schematic diagram of
[0023] Figure 4 It is a cross-sectional schematic diagram of a specific embodiment 2 of the low-voltage tubular bus duct provided by the utility model.
[0024] Figure 1-Figure 4 middle:
[0025] 1 is a sheet-like phase conductor, 11 is a conductor insulation layer, 12 is a tinned layer (or a silvered layer), 2 is an insulating support, 3 is an N-phase insulating tube, 4 is an N-phase conductor, 5 is a PE line layer, 6 is an insulating protective layer, 61 is a steel belt layer, 62 is a heat-shrinkable wear-resistant protective sleeve, and 7 is an insulating filling block. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] The core of the utility model is to provide a low-voltage tubular bus duct, in which the sheet-shaped phase conductor passes through an insulating support, and has a compact structure, convenient installation, long service life and low cost.
[0028] The low-voltage tubular bus duct provided by the utility model is used for a low-voltage bus duct system, comprising at least three sheet-like phase line conductors 1, an insulating support 2 being provided between two adjacent sheet-like phase line conductors 1, the sheet-like phase line conductors 1 being clamped in the conductor mounting groove of the insulating support 2 to form a tubular structure, and the tubular structure being provided with a PE line and an insulating protective layer 6 in sequence from the inside to the outside.
[0029] It should be noted that the tubular structure can be a round tube structure or a square tube structure. The specific shape and size of the tubular structure are determined according to design indicators such as the current level of the bus duct in actual production, and will not be repeated here.
[0030] The two ends of the sheet-like phase line conductor 1 are respectively clamped with the insulating support members 2 on both sides. Several sheet-like phase line conductors 1 are spliced through the insulating support members 2 to form a tubular structure. Compared with the traditional parallel stacking setting, the tubular structure has a large heat dissipation area and a better heat dissipation effect. There is no obvious temperature difference between the sheet-like phase line conductors 1 during operation. Therefore, the aging speed of the insulating support members 2 of each sheet-like phase line conductor 1 is roughly the same, which is beneficial to extending the service life of the bus duct.
[0031] The thickness of the sheet-like phase line conductor 1 can affect the current level of the low-voltage tubular bus duct, so its current level can be adjusted by changing the thickness of the sheet-like phase line conductor 1; the material and size of the sheet-like phase line conductor 1 and the insulating support 2 are determined according to actual production needs and with reference to the prior art.
[0032] Considering the factors such as conductivity and tensile strength, the sheet-shaped phase conductor 1 is usually set as an electrolytic copper conductor; the insulating support 2 is made of insulating material, and its specific material can refer to the insulating layer between each conductive row of the existing dense bus duct.
[0033] In order to improve the insulation performance and protection level of the sheet-shaped phase conductor 1, a conductor insulation layer 11 is provided on the surface of the sheet-shaped phase conductor 1. The conductor insulation layer 11 can be a heat shrinkable insulation layer formed by heat shrinking a cross-linked sleeve, or a fluidized insulation layer obtained by fluidizing a powder.
[0034] At the same time, both ends of the sheet-shaped phase line conductor 1 are provided with a tin-plated layer or a silver-plated layer 12 to reduce the contact resistance, improve the conductivity, and prevent the surface of the sheet-shaped phase line conductor 1 from being oxidized.
[0035] The specific material and size of the conductor insulation layer 11 and the tin-plated layer or silver-plated layer 12 are determined according to the actual production needs with reference to the existing intensive bus duct, and will not be elaborated here.
[0036] In order to ensure the safety of power distribution, the bus duct is equipped with a PE line (ground line) and an N line (neutral line). The PE line is arranged outside the tubular structure and is mostly wound around the outer surface of the tubular structure to form a PE line layer 5. In order to prevent the PE line from contacting the L line (live line) and causing a short circuit, Figure 3 and Figure 4 As shown, an insulating filling block 7 is provided between the PE line and the sheet-like phase line conductor 1. The shape and size of the insulating filling block 7 are determined according to the shape and size of the sheet-like phase line conductor 1, and the material is the same as the insulating support member 2 mentioned above.
[0037] The N line can be any one of the flat phase conductors 1, such as Figure 4 It can also be a centrally arranged N-phase conductor 4, the N-phase conductor 4 is connected to the insulating support member 2 through the N-phase insulating tube 3, such as Figure 3 As shown, the N-phase conductor 4 can be effectively fixed, and the N-phase conductor 4 can be prevented from contacting and short-circuiting with each sheet-shaped phase line conductor 1 as an L line.
[0038] In order to make the intervals between the phase lines consistent, the shapes and sizes of the sheet-like phase line conductors 1 are usually the same, and the sheet-like phase line conductors 1 are evenly distributed along the axial direction of the tubular structure.
[0039] In order to protect the tubular structure and the PE line, an insulating protective layer 6 is provided on the outermost side of the tubular structure. The specific number of layers, material and size of the insulating protective layer 6 are determined according to actual production needs and with reference to the prior art.
[0040] Please refer to Figure 3 and Figure 4The insulating protective layer 6 includes a steel belt layer 61 and a heat-shrinkable wear-resistant protective sleeve 62. The steel belt layer 61 is wound around the outside of the PE line, and the steel belt layer 61 is mainly used for the internal protection of the bus duct; the heat-shrinkable wear-resistant protective sleeve 62 is sleeved outside the steel belt layer 61, and the heat-shrinkable wear-resistant protective sleeve 62 is mostly set as a rubber protective sleeve, which has good sealing and wear resistance, and can play a good role in insulation protection and anti-oxidation.
[0041] During production, the sheet-like phase conductor 1 and the insulating support 2 are first assembled so that the two form a tubular structure; then the PE wire layer 5 and the steel belt layer 61 are wound using automated equipment, and finally a heat-shrinkable wear-resistant protective sleeve 62 is extruded on the outer peripheral surface of the steel belt layer 61 using an extrusion process to improve the protection level of the low-voltage tubular bus duct, which can usually reach IP68.
[0042] In this embodiment, a plurality of sheet-shaped phase line conductors 1 are spliced through an insulating support 2 to form a tubular structure, and the current level can be adjusted by changing the thickness of the sheet-shaped phase line conductor 1. Compared with the existing rectangular intensive bus duct, the structure is more compact, the space occupied is smaller, the installation is more flexible and convenient, the cost is lower, the span is larger, and the application scenarios are more extensive;
[0043] The tubular layout of the sheet-like phase conductor 1 increases the heat dissipation area of the bus duct, avoids the problem of poor heat dissipation and high temperature of the middle conductor caused by conductor stacking, slows down the aging speed of the insulating support 2, and significantly improves the service life of the bus duct.
[0044] In a specific embodiment, please refer to Figure 4 The tubular structure has at least four sheet-shaped phase line conductors 1 evenly distributed along the circumferential direction, and any sheet-shaped phase line conductor 1 is an N-phase conductor 4 .
[0045] In another specific implementation, a coaxially arranged N-phase insulating tube 3 is provided in the tubular structure, the N-phase conductor 4 is sleeved in the N-phase insulating tube 3 , and the insulating support members 2 are insulated and connected to the outer wall of the N-phase insulating tube 3 .
[0046] It should be noted that the coaxial arrangement here means that the shape of the N-phase insulating tube 3 is similar to the tubular structure, and the centers of the two coincide.
[0047] The outer wall of the N-phase insulating tube 3 is connected to each insulating support 2. To ensure that the N line and the L line are not conductive, the connection structure between the two should be an insulating structure. Considering that the span of the low-voltage tubular bus duct is relatively long, which can be as large as 6m, in order to facilitate the connection between the N-phase insulating tube 3 and the insulating support 2, a snap-on connection is often provided between the two, or the two are provided as an integrated structure.
[0048] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0049] The low-voltage tubular bus duct provided by the utility model is introduced in detail above. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.
Claims
1. A low-voltage tubular bus duct, used in a low-voltage bus duct system, characterized in that: The invention comprises at least three sheet-shaped phase line conductors (1), an insulating support (2) being provided between two adjacent sheet-shaped phase line conductors (1), the sheet-shaped phase line conductors (1) being clamped in the conductor installation groove of the insulating support (2) to form a tubular structure, and the tubular structure being provided with a PE wire and an insulating protective layer (6) in sequence from the inside to the outside.
2. The low-voltage tubular bus duct according to claim 1, characterized in that: The tubular structure has at least four sheet-shaped phase line conductors (1) evenly distributed along the circumferential direction, and any one of the sheet-shaped phase line conductors (1) is an N-phase conductor (4).
3. The low-voltage tubular bus duct according to claim 1, characterized in that: A coaxially arranged N-phase insulating tube (3) is provided in the tubular structure, an N-phase conductor (4) is sleeved in the N-phase insulating tube (3), and the insulating support members (2) are insulated and connected to the outer wall surface of the N-phase insulating tube (3).
4. The low-voltage tubular bus duct according to claim 3, characterized in that: The insulating support member (2) and the N-phase insulating tube (3) are an integrated structure.
5. The low-voltage tubular bus duct according to any one of claims 1 to 4, characterized in that: The surface of the sheet-shaped phase line conductor (1) is provided with a conductor insulation layer (11), and both ends of the sheet-shaped phase line conductor (1) are provided with a tin-plated layer or a silver-plated layer (12).
6. The low-voltage tubular bus duct according to claim 5, characterized in that: The conductor insulation layer (11) comprises a fluidized insulation layer and a heat shrinkable insulation layer.
7. The low-voltage tubular bus duct according to any one of claims 1 to 4, characterized in that: The PE wire is wound around the outer peripheral surface of the tubular structure to form a PE wire layer (5).
8. The low-voltage tubular bus duct according to any one of claims 1 to 4, characterized in that: The insulating protective layer (6) comprises a steel belt layer (61) and a heat-shrinkable wear-resistant protective sleeve (62); the steel belt layer (61) is wound around the outside of the PE wire, and the heat-shrinkable wear-resistant protective sleeve (62) is sleeved outside the steel belt layer (61).