Crane resistance box outgoing line wiring structure
By introducing terminal blocks and connecting copper busbars into the overhead resistor box, the problems of cable aging and adhesion in the high-temperature coal dust environment were solved, and the stable operation and safe maintenance of the resistor box were achieved.
Patent Information
- Application Number
- CN202422619430.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-10-29
AI Technical Summary
When the crane resistor box is operating in high temperature and pulverized coal environment, the cable insulation layer is prone to carbonization and the internal copper wires are aged, resulting in poor contact and burnout, which makes maintenance difficult and poses a high safety hazard.
It adopts a terminal block and connecting copper busbar structure. The cable is connected to the terminal block, and the connecting copper busbar replaces the traditional cable. The external cable is uniformly connected through the terminal block. The connecting copper busbar is covered with heat shrink tubing or yellow wax tubing to ensure reliability and sealing.
This reduces the difficulty of maintenance, avoids melting of cable insulation and cable adhesion, ensures the operational stability and safety of the resistor box, and reduces the frequency of maintenance.
Smart Images
Figure CN223513725U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of resistor box technology, specifically to a wiring structure for the lead wires of a vehicle resistor box. Background Technology
[0002] The operation of the overhead crane is crucial to the continuity of production, the safety of operators, the safety of maintenance personnel, and the intensity of their work. The overhead crane is three or four stories high, requiring electricians to climb to great heights for maintenance. In summer, temperatures on the crane can reach over 50 degrees Celsius, increasing the risk of heatstroke during maintenance. Furthermore, the dusty environment on-site is poor, making maintenance extremely difficult and dangerous.
[0003] The overhead cranes in the company's new project have sealed resistor boxes. After one or two months of operation in the summer, it is found that the crane's grab bucket is weak and unable to grab properly. Even after three to four months of operation in the cold winter, the same problem occurs. Upon opening the resistor box for inspection, it is found that the insulation layer of the upper cable is carbonized, and the copper wires inside the cable show signs of aging, arcing, and heat dissipation. The internal wires are also hot and sticking together, frequently burning out or breaking and sticking together. This makes maintenance difficult and poses a significant safety hazard. Therefore, this utility model proposes a wiring structure for the lead wires of the overhead crane resistor box. Utility Model Content
[0004] The purpose of this utility model is to provide a wiring structure for the lead wire of a vehicle resistor box to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a wiring structure for the lead wire of a vehicle resistor box, comprising a resistor box, wherein multiple horizontally arranged resistors are fixedly installed inside the resistor box, and a energized metal rod is fixedly connected to the inner surface of each resistor. A terminal block is provided on the bottom inner wall of the resistor box, and a connecting copper busbar is fixedly connected between the terminal block and the energized metal rod. Multiple cables are installed at one end of the terminal block.
[0006] As a preferred technical solution of this utility model, the outer surface of the connecting copper busbar is covered with a heat shrink tubing.
[0007] As a preferred technical solution of this utility model, the outer surface of the connecting copper busbar is covered with a yellow wax tube.
[0008] As a preferred technical solution of this utility model, the number of connecting copper busbars is several, and each connecting copper busbar is arranged vertically.
[0009] As a preferred technical solution of this utility model, the end of the cable away from the terminal block passes through and extends to the outside of the resistor box.
[0010] Compared with the prior art, the beneficial effects of this utility model are:
[0011] This utility model discloses a wiring structure for the lead wires of a crane resistor box. To reduce maintenance difficulty and speed up maintenance time, the incoming line does not go directly to the connector. Instead, a terminal block is uniformly installed below, and all external cables are connected to the terminal block. To ensure reliability and durability, the connection in the middle is changed from the traditional cable to a connecting copper busbar. This solves the problem of the cable insulation melting and splicing with the outer shell or two cables due to overheating of the internal environment. At the same time, it does not damage the sealing of the resistor box itself. After the modification, the operation is stable and reliable, completely eliminating the previous faults, reducing maintenance, and ensuring production safety.
[0012] Other features and advantages of this invention will be described in detail in the following specific embodiments. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0014] In the diagram: 1. Resistance box; 2. Resistor; 3. Energized metal rod; 4. Terminal block; 5. Connecting copper busbar; 6. Cable. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0017] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0018] During the initial research and development of this utility model, the inventors, based on years of accumulated experience, determined that the aging, sparking, and overheating of the cables inside the resistor box were due to the working environment of the resistor box. It needs to be sealed to prevent external coal dust from entering and affecting safety. However, during continuous operation, the resistor box releases a large amount of heat, which accumulates on the upper part of the resistor box. Temperatures measured during shutdown maintenance were above 80 degrees Celsius. It can be inferred that the internal temperature will be even higher during continuous operation. Therefore, the cable heads at the top of the resistor box are particularly prone to aging and overheating during use, causing the two cables to stick together and resulting in poor contact. Meanwhile, the lower cables were observed to be basically fine. Therefore, it was determined that the problem was mainly due to overheating.
[0019] Based on this, see Figure 1 This embodiment provides a wiring structure for the lead wires of a vehicle resistor box, including a resistor box 1. Multiple horizontally arranged resistors 2 are fixedly installed inside the resistor box 1. A energized metal rod 3 is fixedly connected to the inner surface of each resistor 2. A terminal block 4 is provided on the bottom inner wall of the resistor box 1, and a connecting copper busbar 5 is fixedly connected between the terminal block 4 and the energized metal rod 3. Multiple cables 6 are installed at one end of the terminal block 4. The outer surface of the connecting copper busbar 5 is covered with heat shrink tubing or yellow wax tubing. There are several connecting copper busbars 5, each of which is arranged vertically. The bottom of the connecting copper busbar 5 is fixedly connected to the terminal block 4 by bolts. The end of the cable 6 away from the terminal block 4 passes through and extends to the outside of the resistor box 1, so that the cable 6 is led out and fixedly installed on the corresponding equipment.
[0020] It should be noted that in this embodiment, the inventor's improvement idea is as follows: adding a fan may reduce the sealing environment of the box. At the same time, the on-site environment is harsh and there is a lot of coal dust. The fan may blow coal dust onto the cables and resistors, causing damage to electrical appliances. If dustproof cotton is added, it will increase the difficulty and frequency of cleaning, as well as the difficulty of daily maintenance. This will make the environment less sealed, which may lead to power outages, overheating, and the probability of sparking.
[0021] Therefore, in order to reduce the difficulty of maintenance and speed up the maintenance time, the incoming line does not go directly to the connector. Instead, a terminal block 4 is installed at the bottom. All external cables 6 are connected to the terminal block 4. The connection in the middle is changed from the traditional cable to a copper busbar 5 to ensure reliability and durability. This solves the problem of the cable insulation melting and splicing with the outer shell or two cables due to overheating of the internal environment. At the same time, it does not damage the sealing of the resistor box itself. After the modification, the operation is stable and reliable, the previous faults are completely eliminated, maintenance is reduced, and production safety is ensured.
[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A wiring structure for the lead wires of a vehicle resistor box, characterized in that, The device includes a resistor box (1), in which multiple horizontally arranged resistors (2) are fixedly installed. Each resistor (2) has a energized metal rod (3) fixedly connected to its inner surface. A terminal block (4) is provided on the bottom inner wall of the resistor box (1), and a connecting copper busbar (5) is fixedly connected between the terminal block (4) and the energized metal rod (3). Multiple cables (6) are installed at one end of the terminal block (4).
2. The wiring structure for the lead wire of a crane resistor box according to claim 1, characterized in that, The outer surface of the connecting copper busbar (5) is covered with a heat shrink tubing.
3. The wiring structure for the lead wire of a crane resistor box according to claim 1, characterized in that, The outer surface of the connecting copper busbar (5) is covered with yellow wax tube.
4. The wiring structure for the lead wire of a crane resistor box according to claim 1, characterized in that, The number of connecting copper busbars (5) is several, and each connecting copper busbar (5) is arranged vertically.
5. The wiring structure for the lead wire of a crane resistor box according to claim 1, characterized in that, The end of the cable (6) away from the terminal block (4) passes through and extends to the outside of the resistor box (1).