Large-current high-voltage circuit breaker connecting contact arm
By setting up multiple sets of heat dissipation grooves and convex parts on the outer periphery of the contact arm of the high-voltage circuit breaker, forming a wavy structure, solving the problem of poor heat dissipation of the contact arm, achieving effective heat dissipation, extending service life and reducing equipment failures.
Patent Information
- Application Number
- CN202422544524.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-22
AI Technical Summary
The contact arms of existing high-voltage circuit breakers have poor heat dissipation effect, resulting in thermal deformation during large currents, reducing contact surfaces and increasing the risk of equipment failure.
A high-current high-voltage circuit breaker is designed to connect the contact arm. Multiple groups of heat dissipation grooves and convex parts are provided on the outer periphery of the contact arm body to form a wavy structure to increase the heat dissipation area, and a sensor and a steel belt fixing structure are provided at the connection head of the high-voltage circuit breaker.
Effectively disperse heat generated by large currents, avoid thermal deformation, improve the service life of the contact arm and reduce the failure rate of high-voltage circuit breakers.
Smart Images
Figure CN223230266U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electricity, in particular to a connecting contact arm of a large current and high voltage circuit breaker. Background Art
[0002] High-voltage circuit breakers (or high-voltage switches) not only cut off or close the no-load and load currents in high-voltage circuits, but also, when a system fault occurs, cut off overload and short-circuit currents through the action of relay protection devices. They have a fairly complete arc-extinguishing structure and sufficient current-interrupting capacity. The contact arm is a key component of the high-voltage circuit breaker, connecting it to the high-voltage circuit breaker and the plum blossom contacts.
[0003] The contact arm of the existing high-voltage circuit breaker is cylindrical with a closed outer surface, which has poor heat dissipation effect. When the current is large, this contact arm will generate a lot of heat, causing thermal deformation and reducing the contact surface, thus causing a short circuit and equipment failure. Utility Model Content
[0004] The utility model provides a connecting contact arm for a large current and high voltage circuit breaker, the main purpose of which is to overcome the problem of poor heat dissipation effect of the existing contact arm.
[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:
[0006] A high-current, high-voltage circuit breaker connecting contact arm comprises a contact arm body, wherein a first mounting hole extending leftward and rightward is provided in the middle of the contact arm body, a plurality of groups of heat dissipation grooves connected to the first mounting hole are distributed on the outer periphery of the contact arm body, each group of heat dissipation grooves is composed of a plurality of heat dissipation grooves, and a sheet is formed between two adjacent heat dissipation grooves, a plum blossom contact mounting groove is provided on the outer periphery of the left end of the contact arm body, a high-voltage circuit breaker connector is provided on the right end of the contact arm body, an outer diameter of the high-voltage circuit breaker connector is smaller than an outer diameter of the contact arm body, a second mounting hole extending leftward and rightward and connected to the first mounting hole is provided on the connector, and a diameter of the second mounting hole is smaller than a diameter of the first mounting hole.
[0007] Furthermore, the heat dissipation slots are provided in four groups, and each group of heat dissipation slots consists of three heat dissipation slots.
[0008] Furthermore, the outer periphery of the contact arm body is provided with a plurality of protrusions arranged on the left and right, and the multiple groups of heat dissipation grooves cut the multiple protrusions into a plurality of large protrusions and a plurality of small protrusions, and the plurality of large protrusions and the plurality of small protrusions are all triangular in shape. The large protrusions are formed on the outer periphery of the contact arm body, and the heat dissipation grooves are distributed on the front and rear sides of the large protrusions, and the small protrusions are formed on the outer side surface of the sheet.
[0009] Furthermore, the plurality of heat dissipation slots are arranged along the length direction of the contact arm body.
[0010] Furthermore, a sensor placement groove is provided on the outer periphery of the high-voltage circuit breaker connector.
[0011] Furthermore, the outer periphery of the high-voltage circuit breaker connector is also provided with a steel belt fixing cut and two steel belt placement grooves. The sensor placement groove and the steel belt fixing cut are arranged front and back. The two steel belt placement grooves are respectively located on the upper and lower sides of the sensor placement groove and are both connected to the steel belt fixing cut.
[0012] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following advantages:
[0013] 1. The multiple sets of heat dissipation slots on the contact arm body enable the contact arm body to have a heat dissipation function, ensuring that a large amount of heat generated during high current can be dissipated in time, avoiding the problem of reducing the contact surface of the contact arm body due to thermal deformation, and reducing the failure rate of the high-voltage circuit breaker while increasing the service life of the contact arm body.
[0014] 2. The arrangement of the plurality of large protrusions and the plurality of small protrusions enables the contact arm body and the sheet body to form a wave shape, thereby increasing the heat dissipation area of the contact arm body and further improving the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a structural diagram of the utility model.
[0016] Figure 2 This is a structural diagram of the utility model from another angle. DETAILED DESCRIPTION
[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0018] Reference Figure 1 and Figure 2A high-current, high-voltage circuit breaker connecting contact arm includes a contact arm body 1. A first mounting hole 2 extending horizontally through the middle of the contact arm body 1 is provided. Multiple groups of heat dissipation slots 3 communicating with the first mounting hole 2 are distributed uniformly on the periphery of the contact arm body 1. Each group of heat dissipation slots 3 is composed of multiple heat dissipation slots 3, and a sheet 4 is formed between two adjacent heat dissipation slots 3. A plum blossom contact mounting slot 5 is provided on the periphery of the left end of the contact arm body 1. A high-voltage circuit breaker connector 6 is provided on the right end of the contact arm body 1. The outer diameter of the high-voltage circuit breaker connector 6 is smaller than the outer diameter of the contact arm body 1. The high-voltage circuit breaker connector 6 is provided with a second mounting hole 7 extending horizontally through the contact arm body 1 and communicating with the first mounting hole 2. The diameter of the second mounting hole 7 is smaller than the diameter of the first mounting hole 1.
[0019] Reference Figure 1 and Figure 2 The plurality of groups of heat dissipation slots 3 are arranged along the length of the contact arm body 1. In this embodiment, four groups of heat dissipation slots 3 are provided, each group of heat dissipation slots 3 consisting of three heat dissipation slots 3. Of course, the number of heat dissipation slots 3 does not necessarily need to be limited to four groups; other reasonable numbers of groups may be provided. The number of groups of heat dissipation slots 3 can be appropriately set based on the size of the contact arm body 1, such as two, three, five, or six groups. The number of heat dissipation slots 3 in each group does not necessarily need to be limited to three; other reasonable numbers of groups may be provided. The number of heat dissipation slots 3 in each group can be appropriately set based on the size of the contact arm body 1, such as two, three, five, or six groups.
[0020] Reference Figure 1 and Figure 2 The outer periphery of the contact arm body 1 is provided with a plurality of protrusions arranged left and right. The plurality of heat dissipation grooves 3 cut the plurality of protrusions into a plurality of large protrusions 8 and a plurality of small protrusions 9. The plurality of large protrusions 8 and the plurality of small protrusions 9 are all triangular in shape. The large protrusions 8 are formed on the outer periphery of the contact arm body 1, and the heat dissipation grooves 3 are distributed on both the front and rear sides of the large protrusions 8. The small protrusions 9 are formed on the outer side of the sheet 4. In this embodiment, there are four protrusions. Of course, the number of protrusions can be reasonably set according to the size of the contact arm body 1, such as two, three, five, six, etc.
[0021] Reference Figure 1 and Figure 2 The multiple sets of heat dissipation slots 3 on the contact arm body 1 provide heat dissipation, ensuring that the large amounts of heat generated during high current flow can be dissipated promptly. This prevents the contact arm body 1 from reducing its contact surface due to thermal deformation, thereby increasing the service life of the contact arm body and reducing the failure rate of the high-voltage circuit breaker. Furthermore, the arrangement of the multiple large protrusions 8 and the multiple small protrusions 9 creates a wavy shape between the contact arm 1 and the plate 4, thereby increasing the heat dissipation area of the contact arm body 1 and further enhancing the heat dissipation effect.
[0022] Reference Figure 1 and Figure 2 The outer periphery of the high-voltage circuit breaker connector 6 is provided with a sensor placement groove 10. The outer periphery of the high-voltage circuit breaker connector 6 is also provided with a steel belt fixing cutout 11 and two steel belt placement grooves 12. The sensor placement groove 10 and the steel belt fixing cutout 11 are arranged front and back. The two steel belt placement grooves 12 are respectively located on the upper and lower sides of the sensor placement groove 10 and are both connected to the steel belt fixing cutout 11. A sensor is placed in the sensor placement groove 10. The sensor can record temperature, power transmission, conductivity and other data. The two ends of the sensor are respectively connected to two steel belts. When the sensor is installed, each steel belt is located in a steel belt placement groove 12, and the ends of the two steel belts are fixed on the fixing cutout 11.
[0023] The above is only a specific implementation method of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.
Claims
1. A high current and high voltage circuit breaker connecting contact arm, characterized by: It includes a contact arm body, a first mounting hole that passes through the middle of the contact arm body to the left and right, a plurality of groups of heat dissipation grooves that are connected to the first mounting hole are distributed on the outer periphery of the contact arm body, each group of heat dissipation grooves is composed of a plurality of heat dissipation grooves, and a sheet is formed between two adjacent heat dissipation grooves, a plum blossom contact mounting groove is provided on the outer periphery of the left end of the contact arm body, a high-voltage circuit breaker connector is provided on the right end of the contact arm body, the outer diameter of the high-voltage circuit breaker connector is smaller than the outer diameter of the contact arm body, and the high-voltage circuit breaker connector is provided with a second mounting hole that passes through the left and right and is connected to the first mounting hole, and the diameter of the second mounting hole is smaller than the diameter of the first mounting hole.
2. A high current and high voltage circuit breaker connecting contact arm according to claim 1, characterized in that: The heat dissipation slots are provided in four groups, and each group of heat dissipation slots consists of three heat dissipation slots.
3. The high-current and high-voltage circuit breaker connecting contact arm according to claim 1, characterized in that: The outer periphery of the contact arm body is provided with a plurality of protrusions arranged on the left and right, and the plurality of heat dissipation grooves cut the plurality of protrusions into a plurality of large protrusions and a plurality of small protrusions. The plurality of large protrusions and the plurality of small protrusions are all triangular in shape. The large protrusion is formed on the outer periphery of the contact arm body, and the heat dissipation grooves are distributed on the front and rear sides of the large protrusion. The small protrusion is formed on the outer side surface of the sheet.
4. The high-current and high-voltage circuit breaker connecting contact arm according to claim 1, characterized in that: The plurality of heat dissipation slots are arranged along the length direction of the contact arm body.
5. The high-current and high-voltage circuit breaker connecting contact arm according to claim 1, characterized in that: A sensor placement groove is provided on the outer periphery of the high-voltage circuit breaker connector.
6. A high current and high voltage circuit breaker connecting contact arm according to claim 5, characterized in that: The outer periphery of the high-voltage circuit breaker connector is also provided with a steel belt fixing cutout and two steel belt placement grooves. The sensor placement groove and the steel belt fixing cutout are arranged front and back. The two steel belt placement grooves are respectively located on the upper and lower sides of the sensor placement groove and are both connected to the steel belt fixing cutout.