Low-voltage direct-current bus of tubular conductor
By adopting the method of using a round tube -type conductor and welding the intermediate joint, the problem of poor heat dissipation performance and insufficient mechanical strength of the low -voltage DC busine conductivity, and realized higher load capacity, lower temperature rise and smaller maintenance volume , Has a high cost performance.
Patent Information
- Application Number
- CN202420229054.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-01-31
AI Technical Summary
When the existing low-voltage DC bus transmits a large current, the conductor's thermal dissipation performance is poor, resulting in an increase in line resistance and a decrease in current carrying capacity. At the same time, the contact resistance at the intermediate joint is large, the temperature is increased, the maintenance workload is large, and the mechanical strength of the conductor is limited. Higher cost.
The circular tube -type conductors are used as the load conductor of the low -voltage DC bus, and the intermediate joints are connected through welding to reduce the contact resistance and temperature rise, and improve the heat dissipation performance and mechanical strength.
It improves the heat dissipation performance and mechanical strength of the conductor, reduces the temperature rise and maintenance workload, enhances the current bearing capacity and reliability, and has a high cost performance.
Smart Images
Figure CN222421382U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of power transmission and distribution, in particular to a low-voltage direct current busbar used for electric energy transmission. Background Art
[0002] Low-voltage DC busbars are widely used, using copper or aluminum bars as conductors. When transmitting larger currents, multiple copper or aluminum bars are generally connected in parallel as one phase. Experiments have shown that multiple bars connected in parallel affect the heat dissipation performance of the conductor itself. As the temperature of the conductor increases, the line resistance will increase, thereby reducing the current carrying capacity of the busbar. The middle joints of low-voltage DC busbars with copper or aluminum bars as conductors generally use plug-in bolt connections. The contact resistance at the joints is large, the temperature rises, and it is necessary to shut down the power regularly to tighten the bolts, which requires a lot of maintenance work.
[0003] Copper or aluminum busbars have limited mechanical strength and insufficient electric force bearing capacity, so it is necessary to reduce the span and increase the number of insulating supports. However, the increase in the number of insulating supports also leads to an increase in cost.
[0004] To this end, the utility model adopts a round tube conductor as a current-carrying conductor of a low-voltage DC busbar and processes the intermediate joint by welding, thereby effectively solving the above-mentioned problem. Summary of the invention
[0005] The technical problem to be solved by the utility model is to provide a low-voltage DC busbar with a round tube conductor which has a larger surface area, stronger heat dissipation performance, higher mechanical strength and less maintenance during operation.
[0006] The purpose of the utility model is achieved in this way:
[0007] A round tube conductor is used as the busbar current carrier, and the busbar intermediate joint conductor connection method is welding connection.
[0008] The specific structure is: it includes a circular tubular conductor, and the starting and terminal circular tubular conductors are only provided with a terminal at one end (that is, the busbar end terminal), and the middle circular tubular conductor does not need to be provided with a terminal at both ends. Each section of the circular tubular conductor is connected as a whole by welding, that is, the connection method of the busbar middle joint conductor is welding connection, the circular tubular conductor is covered with an insulator, and a fixing clip is installed outside the insulator.
[0009] The fixing clamp is composed of two fixing clamp monomers. The corresponding sides of the two fixing clamp monomers are provided with semicircular grooves recessed into the inside of the fixing clamp monomers. The grooves of the two fixing clamp monomers are in contact with the insulator outside the circular tube conductor. The two fixing clamp monomers are connected by bolts.
[0010] As an improvement of a low-voltage DC busbar with a round tube conductor, the round tube conductor has a hollow tube-shaped cross section and is made of copper or aluminum.
[0011] As an improvement of the low-voltage DC busbar of the round tube conductor, the end terminal can be directly pressed by the end of the round tube conductor, or a conductive wire clamp can be welded to the end of the round tube conductor.
[0012] As an improvement of the low-voltage DC busbar of the round tube conductor, the insulator covers the entire or part of the outer surface of the round tube conductor.
[0013] As an improvement of the low-voltage DC busbar with round tube conductor, each phase of the busbar is independently insulated and can be installed without a shell. A shielding shell can also be added to the outside of the busbar according to user requirements.
[0014] The advantages of the utility model are:
[0015] Because it uses round tube conductors as the current carrier of the low-voltage DC busbar, it has a larger surface area, stronger heat dissipation performance, and higher mechanical strength under the same material and cross-sectional area. It has the advantages of large current carrying capacity, low temperature rise, high reliability, and the hollow inner cavity can pass cooling air or coolant, which is convenient for establishing a strong cooling system. Compared with the low-voltage busbar using copper or aluminum bars as conductors, the low-voltage DC busbar with round tube conductors has certain cost-effectiveness advantages. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the utility model;
[0017] Figure 2 It is a cross-sectional schematic diagram of the round tube conductor in the utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the end terminal of the utility model. Figure 1 ;
[0019] Figure 4 This is a schematic diagram of the structure of the end terminal of the utility model. Figure 2 ;
[0020] Figure 5 It is a structural schematic diagram of the fixing clip in the utility model. DETAILED DESCRIPTION
[0021] The following is combined with Figure 1-5 The technical solution described in the utility model is further described in detail so that those skilled in the art can better understand the utility model and implement it, but the implementation methods cited are not intended to limit the utility model.
[0022] A round tube conductor is used as the busbar current carrier, and the busbar intermediate joint conductor connection method is welding connection.
[0023] Reference Figure 1The specific structure is as follows: it includes a round tube conductor 1, the starting and terminal round tube conductors are only provided with a terminal 3 at one end (that is, the busbar end terminal), and the middle round tube conductor does not need to be provided with a terminal at both ends. Each section of the round tube conductor is connected as a whole by welding, that is, the conductor connection method of the busbar middle joint 2 is welding connection, the round tube conductor is covered with an insulator 4, and a fixing clamp 5 is installed outside the insulator.
[0024] Reference Figure 5 The fixing clamp 5 is composed of two fixing clamp monomers 51. The corresponding sides of the two fixing clamp monomers are provided with semicircular grooves 52 recessed into the inside of the fixing clamp monomers. The grooves of the two fixing clamp monomers are in contact with the insulator outside the circular tube conductor. The two fixing clamp monomers are connected by bolts 53.
[0025] Reference Figure 2 The cross section of the circular tube conductor is hollow tube-shaped and is made of copper or aluminum.
[0026] Reference Figure 3 and Figure 4 The end terminal can be directly pressed by the end of the round tube conductor, or a conductive wire clamp can be welded to the end of the round tube conductor.
[0027] The preferred method of connecting the conductors at the busbar intermediate joints is copper welding or aluminum welding, with butt welding being used and covered with an insulator after welding.
[0028] The insulator covers the outer surface of the conductor except the end terminal.
[0029] The above are only preferred implementations of the utility model, and do not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made using the contents of the utility model specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the utility model.
Claims
1. A low-voltage DC busbar with a round tube conductor, characterized in that: The invention comprises a round tube conductor (1), the starting and ending round tube conductors are provided with a connection terminal (3) at only one end, the sections of the round tube conductors are connected as a whole by welding, that is, the conductor connection method of the busbar intermediate joint (2) is welding connection, the round tube conductor is covered with an insulator (4), and a fixing clamp (5) is installed outside the insulator.
2. The low-voltage DC busbar with round tube conductor according to claim 1, characterized in that: The fixing clamp (5) is composed of two fixing clamp monomers (51), and the corresponding sides of the two fixing clamp monomers are provided with semicircular grooves (52) recessed into the inside of the fixing clamp monomers, and the grooves of the two fixing clamp monomers are in contact with the insulator outside the circular tube conductor. The two fixing clamp monomers are connected by bolts (53).
3. The low-voltage DC busbar with round tube conductor according to claim 1 or 2, characterized in that: The cross section of the round tube conductor is in the shape of a hollow tube and is made of copper or aluminum.
4. The low-voltage DC busbar with round tube conductor according to claim 1 or 2, characterized in that: The end terminal is directly pressed by the end of the round tube conductor, or a conductive wire clamp is welded on the end of the round tube conductor.
5. The low-voltage DC busbar with round tube conductor according to claim 1 or 2, characterized in that: The conductor connection method of the busbar intermediate joint is copper welding or aluminum welding, and the welding is butt welding, and the insulation is covered after welding.
6. The low-voltage DC busbar with round tube conductor according to claim 1 or 2, characterized in that: The insulator covers the outer surface of the conductor except the end terminal.