A circuit breaker contact shield

Abstract

The utility model discloses a circuit breaker contact baffle, include: baffle body, joint subassembly and fixed in the positioning seat of circuit breaker surface, joint subassembly fixed mounting is in the bottom surface of baffle body, and joint subassembly includes bottom plate, lock sleeve sliding plate and elastic part, and the surface fixed mounting of bottom plate has the slide guide for guiding lock sleeve sliding plate sliding, and elastic part is used for connecting two lock sleeve sliding plates. In the utility model, through setting joint subassembly in baffle body bottom, the structure design of combination ball head rod plug -in, inclined slot linkage and elastic part reset, realized the quick plug -in and steady locking between baffle and circuit breaker positioning seat, and the installation process does not need tool, and the operation is simple, and can effectively promote the assembly efficiency and maintenance convenience of circuit breaker contact interval isolation baffle.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a circuit breaker contact baffle. Background Technology

[0002] Circuit breakers, as important switching devices widely used in power systems, need to frequently perform opening and closing operations during operation, especially to quickly disconnect the circuit under fault conditions such as short circuits and overloads to prevent the fault from escalating. During the breaking process, a high-temperature arc is generated between the moving and stationary contacts. Therefore, forming a reliable electrical isolation and mechanical shielding structure after the contacts separate is crucial for improving the safety, insulation performance, and protection capabilities of the circuit breaker.

[0003] In existing technologies, contact baffles (also known as contact partitions) or isolation partitions are often used to quickly insert between the moving and stationary contacts after they disconnect, achieving arc blocking and insulation isolation. Existing low-voltage circuit breaker baffle devices use an integrated insulating plate inserted between the contacts, which is simple in structure, but this type of structure has the following shortcomings in practical use: Installation and disassembly are cumbersome: Most existing baffles are fixed with screws or clips, which takes a long time to install and is difficult to disassemble in multi-module circuit breaker scenarios, thus limiting maintenance efficiency.

[0004] Poor structural versatility and insufficient modularity: Some baffles cannot be spliced ​​or combined in multiple positions, making it difficult to adapt to the circuit breaker structure with multiple contacts arranged in a compact manner, resulting in insufficient flexibility in use.

[0005] Lack of a quick locking mechanism: Existing structures generally use a single plug-in fixing method, which lacks a reliable quick positioning and limiting structure, making them prone to loosening and displacement, reducing service life and safety.

[0006] Limited arc resistance: Some baffles are made of ordinary engineering plastics, which are difficult to withstand high-temperature arc erosion for a long time, and are prone to carbonization, insulation degradation and other problems.

[0007] Therefore, in view of the technical defects of existing circuit breaker contact baffles in terms of installation efficiency, locking stability, insulation arc resistance and modularity, there is an urgent need to propose a circuit breaker contact baffle structure that is reliable, quick to install, combinable, has self-locking limit function and good insulation performance, so as to meet the needs of modern circuit breakers for miniaturization, modularization and high safety. Utility Model Content

[0008] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0009] Therefore, the technical solution adopted by this utility model is as follows: a circuit breaker contact baffle, comprising: a baffle body, a connecting assembly, and a positioning seat, wherein: the connecting assembly is fixedly installed on the bottom surface of the baffle body for engaging with the positioning seat on the surface of the circuit breaker housing to achieve quick installation and locking connection; the connecting assembly includes a base plate, a locking sleeve slide plate, and an elastic element, the surface of the base plate is fixedly provided with a sliding guide structure for guiding the sliding of the locking sleeve slide plate; the sliding end faces of the two locking sleeve slide plates are respectively provided with a through hole, a stop groove, and an inclined abutment groove, the elastic element elastically connects the two locking sleeve slide plates for applying a reset tension; the top surface of the positioning seat is provided with a ball head rod, a tongue, and a guide rod, the ball head rod is arranged on one side of the tongue, the through hole of the locking sleeve slide plate engages with the ball head rod, the stop groove and the ball head rod form a locking limit, and the inclined abutment groove slides and abuts with the inclined surface of the tongue to achieve insertion force guidance and conversion.

[0010] In a preferred embodiment, the baffle body is configured as follows: the baffle body is T-shaped, with grooves and connectors on both sides. Multiple baffle bodies can be spliced ​​together through the grooves and connectors to form isolation compartments for multiple circuit breaker contacts.

[0011] Specifically, the structure allows for modular assembly, making it suitable for circuit breaker structures with different pole numbers and contact arrangements, thus improving assembly flexibility and versatility.

[0012] In a preferred embodiment, the bottom surfaces of both the base plate and the baffle body are provided with guide holes, which are used to engage with the guide rod on the positioning seat to achieve accurate alignment guidance during installation and avoid assembly misalignment.

[0013] Specifically, this structure improves the structural calibration accuracy during baffle installation, ensuring reliable matching between the mating components and the positioning seat.

[0014] In a preferred embodiment, the through hole has an inner diameter greater than or equal to the diameter of the ball head of the ball head rod, the stop groove has an arc-shaped structure and an inner diameter smaller than the diameter of the ball head, and the stop groove and the inclined groove are respectively provided on both sides of the through hole.

[0015] Specifically, this structure implements a two-stage guidance from initial insertion to limit locking, improving the smoothness and safety of the locking action.

[0016] In a preferred embodiment, the ball joint and the tongue are each in two sets, the two locking slides are connected by an elastic element, and the stop groove is located on the side close to the elastic element.

[0017] Specifically, during the insertion process, the two ball-head rods respectively engage with the corresponding through holes to form a symmetrical linkage structure, which enhances the structure's self-calibration capability and improves the overall assembly stability.

[0018] In a preferred embodiment, the elastic element is further configured such that, in its initial state, the distance between the two through holes is equal to the distance between the two ball joints. During insertion, the axial insertion force is converted into the sliding force of the locking slide plate through the cooperation of the tongue and the oblique groove. After the limiting is completed, the ball joints are engaged through the stop groove to form a stable connection. When disassembling, it is only necessary to pull out the baffle vertically to disengage the oblique groove from the tongue, and the elastic element drives the two slide plates to spring back and reset, thus completing the quick unlocking.

[0019] Specifically, the structure realizes a quick installation and disassembly mechanism of "insertion locks, removal releases", which significantly improves the efficiency of circuit breaker assembly and maintenance.

[0020] In a preferred embodiment, the baffle body is further configured as follows: from the inside out, the baffle body comprises a reinforcing skeleton layer, an insulating isolation layer, and an arc-resistant protection layer; wherein, the reinforcing skeleton layer provides structural support strength, the insulating isolation layer provides reliable electrical isolation capability, and the arc-resistant protection layer is disposed near the moving and stationary contacts to resist arc erosion and thermal breakdown.

[0021] Specifically, this three-layer structure achieves a comprehensive improvement in strength, insulation, and arc resistance, making it suitable for circuit breaker operation scenarios with high breaking frequency and strong arc environments.

[0022] In summary, this utility model achieves a highly reliable, efficient, and adaptable circuit breaker contact isolation structure through a detachable and splicable baffle body structure, a sliding locking mechanism with linkage limiting, and an arc-resistant multi-layer structure design, and has broad application value.

[0023] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, by setting a connecting component at the bottom of the baffle body, combined with the structural design of ball head rod insertion, inclined groove linkage and elastic element reset, the quick insertion and stable locking between the baffle and the circuit breaker positioning seat are realized. The installation process does not require tools and is simple to operate, which can effectively improve the assembly efficiency and maintenance convenience of the isolation baffle between circuit breaker contacts.

[0024] 2. In this utility model, the baffle body adopts a multi-layer structure design, including an internal reinforcing skeleton layer, an insulating isolation layer, and an arc-resistant protection layer. It not only has good mechanical strength and insulation capability, but also excellent arc impact resistance performance. It can effectively block the arc and isolate the arc path during the disconnection of the moving and stationary contacts, thereby improving the insulation safety between contacts and the overall operational reliability of the circuit breaker. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2This is an exploded structural diagram of one embodiment of the present invention; Figure 3 This is a schematic diagram of the joining component and positioning seat structure according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the locking sleeve slide and elastic element structure according to one embodiment of the present utility model; Figure 5 This is a schematic diagram of the cross-sectional structure of the baffle body according to an embodiment of the present invention.

[0026] Figure label: 100. Baffle body; 101. Connecting groove; 102. Connector; 200. Connecting assembly; 210. Base plate; 211. Sliding guide; 220. Locking sleeve slide plate; 221. Through hole; 222. Stop groove; 223. Angled abutment groove; 230. Elastic element; 300, Positioning seat; 310, Ball head; 320, Tongue; 330, Guide rod. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0028] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0029] The following describes, with reference to the accompanying drawings, some embodiments of a circuit breaker contact baffle provided by this utility model.

[0030] Combination Figures 1-5 As shown, the present invention provides a circuit breaker contact baffle, comprising: a baffle body 100, a connecting assembly 200, and a positioning seat 300.

[0031] The baffle body 100 has an overall T-shaped structure and is used to insulate and shield the multiple contact intervals in the circuit breaker. The two sides of the baffle body 100 are respectively provided with a groove 101 and a plug 102. The groove 101 and the plug 102 cooperate to realize the splicing and installation of multiple baffle bodies 100 to form a multi-unit combination structure, which is suitable for the partitioning and isolation of multiple circuit breaker contacts.

[0032] The engagement assembly 200 is fixedly installed on the bottom surface of the baffle body 100 to enable quick connection and disassembly of the baffle structure and the circuit breaker body. The engagement assembly 200 includes a base plate 210, a locking slide plate 220, and an elastic element 230. The base plate 210 is provided with two sliding guides 211, which guide the sliding engagement of the two locking slide plates 220 respectively. Each locking slide plate 220 is provided with a through hole 221, a stop groove 222, and a beveled groove 223.

[0033] The elastic element 230 adopts an elastic tension structure to connect the two locking slide plates 220, so that it can slide to both sides simultaneously after being subjected to sliding force, and provides elastic reset capability in the released state, ensuring that the structure's movement is controllable and reset is reliable during assembly and disassembly.

[0034] The positioning seat 300 is fixedly installed on the surface of the circuit breaker body housing. Its top surface is provided with two sets of ball-end rods 310, latches 320, and guide rods 330. The guide rods 330 are inserted into corresponding guide holes in the baffle body 100 and the base plate 210 to achieve accurate alignment between the baffle and the positioning seat. The ball-end rods 310 have a ball-end structure, and the latches 320 have a beveled surface structure to engage with the inclined grooves 223 on the locking sleeve slide plate 220.

[0035] During installation, when the baffle body 100 is inserted downwards, the guide rod 330 first enters the guide hole to achieve alignment. The ball head rod 310 passes through the through holes 221 on the two locking sleeve slide plates 220 in sequence. Under the guidance and cooperation of the inclined surface of the tongue 320 and the inclined groove 223, the insertion force is converted into a lateral sliding force, driving the two locking sleeve slide plates 220 to slide along the sliding guide 211 respectively. As the locking sleeve slide plates 220 slide to both sides, the ball head rod 310 disengages from the through hole 221 and enters the stop groove 222. The inner diameter of the stop groove 222 is smaller than the diameter of the ball head of the ball head rod 310, thereby achieving a limiting engagement and completing the mechanical locking between the engaging assembly 200 and the positioning seat 300.

[0036] During disassembly, the operator simply pulls the baffle body 100 upwards vertically, causing the inclined groove 223 to disengage from the inclined surface of the tongue 320. The elastic element 230 then pulls the two locking slide plates 220 back to their original position, and the ball head rod 310 disengages from the stop groove 222 and smoothly passes through the through hole 221, achieving rapid disassembly. The elastic element 230 is a spring-shaped metal strip. Under the condition of short-circuit heating of the circuit breaker contacts, it conducts heat to the locking slide plates 220 and the elastic element 230, causing the elastic element 230 to lose its elastic restoring ability. This means that the locking slide plates 220 and the ball head rod 310 are permanently locked under abnormally high temperatures, preventing them from falling off.

[0037] Furthermore, such as Figure 5As shown, the baffle body 100 includes a three-layer structure arranged sequentially from the inside out: a reinforcing skeleton layer, an insulating isolation layer, and an arc-resistant protection layer. The reinforcing skeleton layer is the main structural support layer, made of reinforced plastic or composite material, and provides structural rigidity support for the baffle. The insulating isolation layer covers the surface of the reinforcing skeleton layer to improve electrical insulation. The arc-resistant protection layer is located on the side facing the moving and stationary contacts of the circuit breaker to improve arc impact resistance. The insulating isolation layer covers the surface of the reinforcing skeleton layer to improve electrical insulation between contacts. The arc-resistant protection layer is located on the side close to the moving and stationary contacts and is made of high-temperature resistant insulating material, ceramic coating, or mica sheet to resist arc impact and thermal erosion during the circuit breaker breaking process, enhancing the isolation reliability between contacts and the baffle life.

[0038] Working principle and usage process of this utility model: This invention achieves rapid installation, reliable locking, and convenient disassembly of circuit breaker contact baffles through the structural cooperation between the connecting component and the positioning seat, and is suitable for isolation and protection scenarios between multi-unit contacts.

[0039] Specifically: During installation, the operator aligns the engagement assembly 200 below the baffle body 100 with the positioning seat 300 on the surface of the circuit breaker body, and achieves initial alignment guidance through the guide rod 330 provided on the base plate 210 and the positioning seat 300. As the engagement assembly 200 continues to be inserted downwards, the ball joint 310 passes through the through holes 221 located on the surfaces of the two locking sleeve slide plates 220 in sequence. Under the synergistic action of the inclined surface of the tongue 320 and the inclined groove 223, the insertion force is converted into the lateral sliding force of the slide plate 220, pushing the two slide plates 220 to slide to both sides along the sliding guide 211 respectively.

[0040] During the sliding process, the ball joint 310 enters and locks into the stop groove 222 on the locking sleeve slide plate 220. The inner diameter of the stop groove 222 is smaller than the diameter of the ball joint, thereby limiting and locking the ball joint 310 to prevent it from coming out. Since the two locking sleeve slide plates 220 are connected by the elastic element 230, the elastic element 230 is stretched and stores energy during the sliding process, forming a self-resetting capability, further enhancing the connection stability. At this point, the baffle body 100 is quickly engaged with the positioning seat 300 through the engaging assembly 200, completing the installation and positioning.

[0041] If disassembly is required, the operator simply pulls up the baffle body 100 vertically, causing the inclined groove 223 to disengage from the tongue 320 surface. At this time, under the rebound action of the elastic element 230, the two locking slide plates 220 simultaneously return to their original position inward, the stop groove 222 disengages from the ball head rod 310, and the through hole 221 aligns with the ball head rod 310, thereby enabling the ball head rod 310 to be smoothly disengaged. The entire baffle structure can be quickly unlocked, allowing for convenient disassembly.

[0042] In addition, by interlocking the slot 101 and the plug 102, multiple baffle bodies 100 can be spliced ​​into a continuous combination structure, which can achieve efficient isolation of multiple contact assemblies, and improve the overall insulation performance, safety protection level and modular compatibility of the circuit breaker system.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A circuit breaker contact baffle, characterized in that, include: The circuit breaker includes a baffle body (100), a connecting assembly (200), and a positioning seat (300) fixed to the surface of the circuit breaker. The connecting assembly (200) is fixedly installed on the bottom surface of the baffle body (100). The connecting assembly (200) includes a base plate (210), a locking slide plate (220), and an elastic element (230). A guide (211) for guiding the sliding of the locking slide plate (220) is fixedly installed on the surface of the base plate (210). The elastic element (230) is used to connect two locking slide plates (220, 220, and 300). 0), the top surface of the positioning seat (300) is fixedly installed with a ball head rod (310), a tongue (320) and a guide rod (330). The ball head rod (310) is arranged on one side of the tongue (320). The surface of the locking sleeve slide plate (220) is provided with a through hole (221) and a stop groove (222) adapted to the ball head rod (310). One side of the through hole (221) is provided with a slanted groove (223). The surface of the tongue (320) is slanted and abuts against the inner side of the slanted groove (223).

2. The circuit breaker contact baffle according to claim 1, characterized in that, The baffle body (100) has an overall T-shaped structure, and its two sides are respectively provided with a groove (101) and a connector (102).

3. The circuit breaker contact baffle according to claim 1, characterized in that, The bottom surfaces of the base plate (210) and the baffle body (100) are provided with guide holes for fitting the guide rod (330) to accurately position and guide the connecting assembly (200) and the positioning seat (300) during installation.

4. The circuit breaker contact baffle according to claim 1, characterized in that, The inner diameter of the through hole (221) is greater than or equal to the diameter of the ball head of the ball head rod (310). The stop groove (222) is an arc-shaped groove with an inner diameter smaller than the diameter of the ball head of the ball head rod (310). The stop groove (222) and the inclined groove (223) are located on both sides of the through hole (221).

5. The circuit breaker contact baffle according to claim 1, characterized in that, The ball joint (310) and the tongue (320) are in two sets each, and the locking sleeve slide (220) is in two sets. The two locking sleeve slides (220) are elastically connected by an elastic element (230), and the stop groove (222) is located on the side of the through hole (221) close to the elastic element (230).

6. The circuit breaker contact baffle according to claim 1, characterized in that, In its initial state, the elastic element (230) makes the distance between the through holes (221) on the two locking slide plates (220) equal to the distance between the two ball joints (310).

7. The circuit breaker contact baffle according to claim 1, characterized in that, The baffle body (100) includes, from the inside out, a reinforcing skeleton layer, an insulating isolation layer and an arc-resistant protection layer. The reinforcing skeleton layer provides structural rigidity support for the baffle. The insulating isolation layer covers the surface of the reinforcing skeleton layer and improves electrical insulation. The arc-resistant protection layer is located on the side facing the moving and stationary contacts of the circuit breaker and improves resistance to electric arc impact.

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