Circuit breaker grounding contact
By designing a circuit breaker grounding contact with a replaceable spring structure, the problem of unreliable circuit breaker grounding was solved, a reliable connection between the circuit breaker and the grounding rail was achieved, ensuring equipment safety and operator safety, and improving the grounding reliability of the circuit breaker and the safe operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2026-03-20
AI Technical Summary
The existing circuit breakers have unreliable grounding issues, which prevents fault current from being reliably discharged through the grounding contacts, potentially burning out the substation's integrated automation system and posing a safety hazard.
A circuit breaker grounding contact comprising a fixing component and a contact component has been designed. It employs a replaceable spring structure to ensure a tight fit between the circuit breaker grounding contact and the grounding rail, and provides seamless adhesion through a strong spring, thereby improving grounding reliability.
It effectively prevents fault current from interfering with secondary equipment, ensures safe equipment operation, avoids equipment damage and personal injury, improves the grounding reliability of circuit breakers, eliminates poor grounding problems, and ensures the safety of railway energy output equipment.
Smart Images
Figure CN224020717U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to circuit breaker technical field especially relates to circuit breaker ground contact. BACKGROUND
[0002] The DC switch cabinet is applied to the power transformation system of rail transit, is the key part of the DC traction power supply system, and the stable operation of the equipment is related to the safety of operation. The DC switch cabinet is usually designed in a cabinet body and trolley split mode. The trolley is installed with a DC circuit breaker, and the DC circuit breaker can be conveniently pushed in and out. As a switching element for cutting off faults, if the trolley is not reliably connected with the grounding contact, the current cannot be returned to the grounding loop, and at this time, the live equipment can cause damage to the secondary equipment of the switch cabinet and pose a threat to the personal safety of the operator.
[0003] The currently operated circuit breaker has the problem of unreliable grounding. After the circuit breaker body fails, large current cannot be reliably discharged through the grounding contact to connect the main ground network, resulting in that the fault current is introduced into the substation protection device through the secondary cable after the fault current occurs, and the substation integrated system is burned and damaged, which has a great safety hazard. In view of the above problems, the circuit breaker grounding contact is proposed. CONTENT OF THE UTILITY MODEL
[0004] The utility model discloses a circuit breaker grounding contact, which can solve the problem of unreliable grounding of the currently operated circuit breaker, and can reliably discharge large current through the grounding contact to connect the main ground network after the circuit breaker body fails, so that the fault current is not introduced into the substation protection device through the secondary cable after the fault current occurs, and the substation integrated system is not burned and damaged, thereby avoiding the great safety hazard.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the circuit breaker grounding contact comprises a fixing assembly and a contact assembly, the fixing assembly comprises a mounting plate, two connecting plates are symmetrically welded at both ends of the mounting plate, two limiting rods are symmetrically fixedly installed at the bottom end of the connecting plate, the contact assembly comprises a grounding row one, a grounding row two and a U-shaped plate, the bottom of the grounding row two is fixedly connected with the top of the grounding row one, and the top of the grounding row two is fixedly installed with the bottom of the U-shaped plate, limiting holes are symmetrically formed in the two sides of the U-shaped plate, the limiting rods pass through the limiting holes in the two sides of the U-shaped plate and are fixedly installed with the connecting plates, two springs are symmetrically fixedly connected with the two ends of the U-shaped plate through bolts, and the top end of the spring is fixedly connected with the bottom of the mounting plate through a bolt.
[0006] Preferably, the bottom of the mounting plate is symmetrically fixedly connected with two mounting blocks at both ends, and the outer diameter of the mounting block is smaller than the inner diameter of the spring.
[0007] Preferably, two fixing blocks are symmetrically fixedly connected to both ends of the U-shaped plate, and the outer diameter of the fixing blocks is smaller than the inner diameter of the spring.
[0008] Preferably, the mounting plate has multiple mounting holes symmetrically extending through both ends.
[0009] Preferably, one end of the second grounding bar has two symmetrical through-holes.
[0010] Preferably, one end of the first grounding busbar is bent upwards, and one end of the second grounding busbar is bent downwards.
[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0012] 1. In this utility model, by setting a grounding contact with a replaceable spring, after the circuit breaker is put into the operating position, on the one hand, when the circuit breaker body fails and the trolley circuit breaker drives the fixed component to move, the grounding contact of the circuit breaker can be tightly attached to the grounding rail under the action of the internal spring, ensuring the safety of the circuit breaker grounding. The current will not flow back to the grounding circuit, and the energized equipment will not cause damage to the secondary equipment of the switch cabinet, avoiding threats to the personal safety of the operators. On the other hand, by installing a strong spring inside the grounding contact of the circuit breaker, after the circuit breaker is in the operating position, the internal spring of the grounding contact can give the contact a certain force to the grounding rail, ensuring seamless adhesion between the grounding contact and the grounding rail.
[0013] 2. In this utility model, the circuit breaker grounding contact can solve the problem of the circuit breaker body being disconnected from the main grounding grid, improve the grounding reliability of the circuit breaker in the traction substation, and prevent large currents from entering the secondary equipment after a circuit breaker failure, thus ensuring the safety of the operating equipment. At the same time, this circuit breaker grounding contact can be promoted and applied to circuit breakers of the same model to eliminate poor circuit breaker grounding, effectively prevent large primary currents from entering the secondary cables and burning the cables and protection devices, ensure the safe and reliable operation of the equipment grounding, and ensure the absolute safety of the railway energy output equipment. Attached Figure Description
[0014] Figure 1 A three-dimensional structural diagram of the grounding contact of the circuit breaker is provided for this utility model;
[0015] Figure 2 A schematic diagram of the rear structure of the grounding contact of the circuit breaker is provided for this utility model;
[0016] Figure 3 A side sectional view of the grounding contact of the circuit breaker is provided for this utility model;
[0017] Figure 4 This invention presents an exploded structural diagram of the grounding contact of a circuit breaker.
[0018] Legend: 1, fixed assembly; 2, contact assembly; 11, mounting plate; 12, mounting hole; 13, connecting plate; 14, limiting rod; 15, mounting block; 21, ground row one; 22, ground row two; 23, connecting hole; 24, fixed block; 25, spring; 26, U-shaped plate; 27, limiting hole. DETAILED DESCRIPTION
[0019] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be further described below with reference to the drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.
[0020] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be practiced in other ways different from those described herein, therefore, the present application is not limited to the specific embodiments disclosed in the following description.
[0021] As shown in Figure 1 - Figure 4 The utility model provides a circuit breaker ground contact, including fixed assembly 1 and contact assembly 2, fixed assembly 1 includes mounting plate 11, and the both ends of mounting plate 11 are symmetrically welded with two connecting plates 13, and the bottom end of connecting plate 13 is symmetrically fixed with two limiting rods 14, contact assembly 2 includes ground row one 21, ground row two 22 and U-shaped plate 26, and the bottom of ground row two 22 is fixedly connected with the top of ground row one 21, and the top of ground row two 22 is fixedly installed with the bottom of U-shaped plate 26, and the both sides of U-shaped plate 26 are symmetrically penetrated and are provided with limiting hole 27, limiting rod 14 passes through the limiting hole 27 of the both sides of U-shaped plate 26 and is fixedly installed with connecting plate 13, and the both ends of U-shaped plate 26 are fixedly connected with two springs 25 through bolt symmetry, and the top end of spring 25 is fixedly connected with the bottom of mounting plate 11 through bolt, by setting the ground contact of additional replaceable spring 25, on the one hand when the trolley circuit breaker drives fixed assembly 1 to move when the circuit breaker body fails, the circuit breaker ground contact (ground row one 21 and ground row two 22) can be tightly attached with the ground rail under the action of internal spring 25, guarantee the safety of circuit breaker ground, on the other hand, after the circuit breaker is in the running position, the internal spring 25 of ground contact can give the ground rail a certain force, ensure that the ground contact is seamlessly connected with the ground rail.
[0022] As shown in Figure 3As shown, the bottom of the mounting plate 11 is fixedly connected with two mounting blocks 15 at both ends symmetrically, the outer diameter of the mounting block 15 is smaller than the inner diameter of the spring 25, the mounting block 15 can assist in limiting the spring 25, so that the spring 25 can be compressed or stretched along the longitudinal direction, avoiding the direction deviation of the spring 25 when compressed.
[0023] As shown in the figure, Figure 3 As shown, the two ends of the U-shaped plate 26 are fixedly connected with two fixed blocks 24 symmetrically, the outer diameter of the fixed block 24 is smaller than the inner diameter of the spring 25, the fixed block 24 can assist in limiting the spring 25, so that the spring 25 can be compressed or stretched along the longitudinal direction, avoiding the direction deviation of the spring 25 when compressed.
[0024] As shown in the figure, Figure 1 As shown, a plurality of mounting holes 12 are symmetrically provided at both ends of the mounting plate 11, and the mounting holes 12 at both ends of the mounting plate 11 are fixedly connected with the circuit breaker through mounting bolts.
[0025] As shown in the figure, Figure 2 As shown, two connecting holes 23 are symmetrically provided at one end of the grounding row two 22, and the contact surfaces of the grounding row one 21 and the grounding row two 22 adopt a multi-layer composite structure, and the outermost layer is a metal alloy coating layer with oxidation resistance and corrosion resistance.
[0026] As shown in the figure, Figure 1 As shown, one end of the grounding row one 21 is bent upward, and one end of the grounding row two 22 is bent downward, when the circuit breaker body fails, the trolley circuit breaker drives the fixed assembly 1 to move, and the circuit breaker grounding contact (the grounding row one 21 and the grounding row two 22) can be tightly attached to the grounding rail under the action of the internal spring 25.
[0027] The working principle and method of use of the device: the grounding contact is composed of the fixed assembly 1 and the contact assembly 2, the mounting plate 11 of the fixed assembly 1 is used to install and fix the grounding contact with the circuit breaker, and the mounting holes 12 at both ends of the mounting plate 11 can be fixedly connected with the circuit breaker through mounting bolts; by setting the grounding contact with replaceable spring 25, after the circuit breaker is put into the running position, on the one hand, when the circuit breaker body fails, the trolley circuit breaker drives the fixed assembly 1 to move, and the circuit breaker grounding contact (the grounding row one 21 and the grounding row two 22) can be tightly attached to the grounding rail under the action of the internal spring 25, ensuring the safety of the circuit breaker grounding, and the current will not flow back to the grounding loop, at this time, the equipment under voltage will not damage the secondary equipment of the switch cabinet, avoiding the threat to the personal safety of the operator, on the other hand, the strong spring 25 is installed in the circuit breaker grounding contact, which can give the contact a certain force to the grounding rail after the circuit breaker is in the running position, ensuring the seamless adhesion of the grounding contact to the grounding rail.
[0028] The circuit breaker grounding contact can solve the problem of the circuit breaker body being separated from the main ground network, improve the reliability of the circuit breaker grounding of the traction substation, prevent the invasion of large current from disturbing the secondary equipment after the circuit breaker fails, ensure the safety of the running equipment, and promote the application of the circuit breaker grounding contact to circuit breakers of the same type, eliminate the poor grounding of the circuit breaker, effectively prevent the invasion of large current into the secondary cable, and prevent the burning of the cable and the protection device, ensure the safe and reliable operation of the equipment grounding, ensure the absolute safety of the railway energy output equipment, and additionally, when the circuit breaker grounding contact is operated for a long time, the internal strong spring 25 needs to be checked, and the spring is replaced and treated when the force is insufficient, to ensure the safe and reliable operation of the running circuit breaker grounding.
[0029] Meanwhile, the contact surface of the first grounding row 21 and the second grounding row 22 adopts a multi-layer composite structure, the outermost layer is an oxidation-resistant and corrosion-resistant metal alloy coating, such as a nickel-chromium alloy coating, the middle layer is a copper alloy layer with high conductivity, which is tightly combined with the inner layer and the outer layer through a special process (such as hot pressing) to reduce the contact resistance, and the inner layer is a high-strength support structure made of stainless steel, which provides sufficient mechanical strength for the contact, and a heat dissipation channel can be designed in the grounding contact, the heat dissipation channel is distributed in the high-heat area of the contact in a mesh shape, and the heat dissipation channel is filled with a heat dissipation material with high thermal conductivity, such as graphite, when the contact generates heat during operation, the heat can be quickly conducted and dissipated through the heat dissipation channel, avoiding local overheating, thereby prolonging the service life of the contact.
[0030] The above is only a preferred embodiment of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can modify or change the above disclosed technical content to equivalent embodiments applied to other fields, but any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application still belong to the protection scope of the present application technical scheme.
Claims
1. A circuit breaker grounding contact, characterized in that: The assembly includes a fixing component (1) and a contact component (2). The fixing component (1) includes a mounting plate (11). Two connecting plates (13) are symmetrically welded to both ends of the mounting plate (11), and two limiting rods (14) are symmetrically fixedly installed at the bottom of the connecting plates (13). The contact component (2) includes a grounding busbar (21), a grounding busbar (22), and a U-shaped plate (26). The bottom of the grounding busbar (22) is fixedly connected to the top of the grounding busbar (21), and the top of the grounding busbar (22) is fixedly installed to the bottom of the U-shaped plate (26). Limiting holes (27) are symmetrically opened through both sides of the U-shaped plate (26). The limiting rods (14) pass through the limiting holes (27) on both sides of the U-shaped plate (26) and are fixedly installed to the connecting plates (13). Two springs (25) are symmetrically fixedly connected to both ends of the U-shaped plate (26) by bolts, and the top of the springs (25) is fixedly connected to the bottom of the mounting plate (11) by bolts.
2. The circuit breaker grounding contact according to claim 1, characterized in that: The bottom ends of the mounting plate (11) are symmetrically fixed with two mounting blocks (15), the outer diameter of the mounting block (15) being smaller than the inner diameter of the spring (25).
3. The circuit breaker grounding contact according to claim 1, characterized in that: The two ends of the U-shaped plate (26) are symmetrically fixedly connected to two fixing blocks (24), the outer diameter of the fixing blocks (24) being smaller than the inner diameter of the spring (25).
4. The circuit breaker grounding contact according to claim 1, characterized in that: The mounting plate (11) has multiple mounting holes (12) symmetrically through both ends.
5. The circuit breaker grounding contact according to claim 1, characterized in that: Two connecting holes (23) are symmetrically opened through one end of the grounding busbar (22).
6. The circuit breaker grounding contact according to claim 1, characterized in that: One end of the grounding busbar one (21) is bent upwards, and one end of the grounding busbar two (22) is bent downwards.