An arc extinguishing structure of an electronic contactor

Abstract

The utility model discloses an arc extinguishing structure of electronic contactor belongs to electrical switch equipment technical field, and this structure includes arc extinguishing cover, movable contact and support, it still includes dustproof subassembly and installation subassembly, dustproof subassembly includes the transparent dust cover of covering in the outside of arc extinguishing cover and the dust cover of hinge rotation connection, the inside of butt joint edge of transparent dust cover and dust cover is fixed with the first magnetic block and the second magnetic block of mutual magnetic attraction respectively, is equipped with the heat dissipation hole on transparent dust cover, installation subassembly includes the fixed plate of being connected with transparent dust cover, mounting plate and the clamping block of being fixed in mounting plate, is equipped with the clamping groove of being hinged with clamping block on fixed plate, the clamping groove has big circle clamping area and narrow locking area. The utility model discloses through integrated dustproof and installation design, and the magnetic attraction structure of open and close is convenient for overhauling, and the heat dissipation hole guarantees the heat dissipation performance, and the clamping type structure realizes quick installation, and has the protection, easy maintenance and installation convenience.

Description

Technical Field

[0001] This utility model relates to the field of electrical switchgear technology, and in particular to an arc-extinguishing structure for an electronic contactor. Background Technology

[0002] Electronic contactors, as core components for remote connection and disconnection of circuits, are widely used in industrial automation control systems. Their internal arc-extinguishing structure, typically composed of an arc-extinguishing chamber, moving contacts, and stationary contacts, is a crucial part ensuring the safe and reliable operation of the contactor; its performance directly affects the service life and electrical safety of the entire equipment.

[0003] In real-world industrial applications, the air inevitably contains a large amount of dust, oil, and conductive powder particles. The core components of existing electronic contactor arc-extinguishing structures are mostly directly or semi-exposed to the working environment. This allows external contaminants to easily penetrate the arc-extinguishing chamber and the contact surfaces of the moving and stationary contacts. Long-term accumulation can lead to poor contact, prolonged arc burning time, and decreased insulation performance. In severe cases, it can even cause short-circuit faults, significantly affecting the stability and safety of the contactor's operation.

[0004] To address the aforementioned contamination issues, some existing designs add a simple protective cover to the arc-extinguishing structure. However, this additional protective cover is often fixed with screws or other fasteners, making it structurally relatively independent. When routine inspections, maintenance, or replacements of the internal arc-extinguishing cover or contacts are required, tools must be used to remove the protective cover, a cumbersome, time-consuming, and labor-intensive process that reduces maintenance efficiency. This inconvenience is particularly pronounced in production lines and other applications requiring rapid response.

[0005] Therefore, existing arc-extinguishing structures generally lack an integrated design that simultaneously achieves both "effective protection" and "easy maintenance." After achieving effective isolation and protection of core components, how to maintain ease of installation and maintenance has become a pressing technical problem in this field.

[0006] Therefore, this utility model proposes an arc-extinguishing structure for electronic contactors to overcome the shortcomings of the prior art. Utility Model Content

[0007] To overcome the above shortcomings, this utility model provides an arc-extinguishing structure for electronic contactors, aiming to improve the problems existing in the arc-extinguishing structure of electronic contactors, such as the susceptibility to dust contamination due to the exposure of core components, and the complexity and inefficiency of subsequent inspection and maintenance operations caused by the additional structure added for protection. This utility model aims to provide an improved arc-extinguishing structure for electronic contactors that can effectively solve the above problems.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: an arc-extinguishing structure for an electronic contactor, comprising: an arc-extinguishing cover, a moving contact, a bracket; and dustproof components and mounting components.

[0009] The dustproof assembly includes a transparent dustproof cover covering the arc-extinguishing cover and the moving contact, and a dustproof cap rotatably connected to the transparent dustproof cover via a hinge.

[0010] The installation assembly includes a fixing plate, a mounting plate, and a locking block. The fixing plate is fixedly connected to the transparent dust cover via a fixing post. The locking block is fixed to the mounting plate, and the fixing plate has a slot suitable for engaging with the locking block.

[0011] Preferably, to ensure reliable closure and convenient opening of the dust cover, the dustproof assembly further includes a first magnetic block and a second magnetic block. Specifically, the first magnetic block is fixed to the inner side of the mating edge of the transparent dust cover, and the second magnetic block is fixed to the inner side of the mating edge of the dust cover. When the dust cover is closed, the first magnetic block and the second magnetic block attract each other through magnetic attraction, thereby locking the dust cover.

[0012] Furthermore, to facilitate the operator in overcoming magnetic attraction to open the dust cover, a pull ring is provided on the outer surface of the dust cover.

[0013] Preferably, in order to solve the heat dissipation problem that may occur due to the sealing of the dustproof component, the transparent dustproof cover has multiple heat dissipation holes on its wall to enhance internal air circulation and dissipate the heat generated by the arc extinguishing cover during operation.

[0014] Preferably, to achieve rapid installation and self-locking of the mounting component, the slot is specifically constructed with a large circular engagement area and a narrow locking area extending along the direction of gravity. This structure allows the locking block to enter from the larger circular engagement area and then slide into the appropriately sized narrow locking area under the influence of gravity, thereby achieving a secure lock.

[0015] Preferably, the connection between the fixing plate and the transparent dust cover is as follows: the fixing plate is fixedly connected to the transparent dust cover by a fixing post. This method has a simple structure and a reliable connection.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, by setting up a dustproof component consisting of a transparent dustproof cover, a dustproof cap, a hinge, and a first magnetic block and a second magnetic block that are magnetically attracted to each other, the problem of arc extinguishing structure being easily contaminated by external dust and the complexity of inspection and maintenance operations in the prior art is solved, and the technical effect of integrating efficient dust prevention and convenient opening and closing maintenance is achieved.

[0018] 2. This utility model solves the problem of internal heat accumulation and poor heat dissipation caused by adding a protective cover by opening multiple heat dissipation holes on the wall of the transparent dust cover, and achieves the technical effect of ensuring good heat dissipation performance of the equipment while providing effective protection. Attached Figure Description

[0019] Figure 1 This is a perspective view of an arc-extinguishing structure for an electronic contactor proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of a transparent dust cover for an arc-extinguishing structure of an electronic contactor proposed in this utility model;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of a slot for an arc-extinguishing structure of an electronic contactor proposed in this utility model.

[0023] Legend:

[0024] 1. Arc extinguishing cover; 2. Moving contact; 3. Bracket; 4. Dustproof assembly; 401. Transparent dustproof cover; 402. Dustproof cap; 403. Hinge; 404. First magnetic block; 405. Second magnetic block; 406. Pull ring; 407. Heat dissipation hole; 5. Mounting assembly; 501. Fixing plate; 502. Slot; 503. Fixing post; 504. Locking block; 505. Mounting plate. Detailed Implementation

[0025] 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.

[0026] Please refer to Figures 1 to 4 This utility model provides an arc-extinguishing structure for electronic contactors, aiming to solve the problems in the prior art where the arc-extinguishing structure of electronic contactors is easily contaminated by dust due to its exposed structure, has poor heat dissipation due to the addition of a protective cover, and has complicated overall structure installation, inspection and maintenance operations.

[0027] like Figure 1As shown, the arc extinguishing structure of the electronic contactor includes an arc extinguishing cover 1 and a moving contact 2 disposed below the arc extinguishing cover 1. The lower end of the moving contact 2 is fixedly connected to the upper end of the bracket 3. The arc extinguishing cover 1 is used to cool and extinguish the arc generated when the moving contact 2 separates from the stationary contact. The bracket 3 is used to provide support for the movement of the moving contact 2.

[0028] The dustproof assembly 4 includes a transparent dust cover 401, which covers the arc-extinguishing chamber 1 and the moving contact 2 to isolate the core arc-extinguishing mechanism from the external environment. The dustproof assembly 4 also includes a dust cover 402, which is rotatably connected to one side of the transparent dust cover 401 via a hinge 403. When the dust cover 402 and the transparent dust cover 401 are closed, they together form a sealed shell for covering the arc-extinguishing chamber 1 and the moving contact 2. This openable structure connected by the hinge 403 provides a convenient passage for subsequent internal maintenance.

[0029] Mounting assembly 5 includes a fixing plate 501, a mounting plate 505, and a locking block 504. The fixing plate 501 is fixedly connected to the transparent dust cover 401 via a fixing post 503, thereby integrating the entire dustproof assembly 4 and mounting assembly 5 into a whole. The mounting plate 505 is used to pre-fix the working area of ​​the external equipment. The surface of the mounting plate 505 is fixed with an outwardly protruding locking block 504. The inner wall of the fixing plate 501 is provided with a slot 502 that matches the locking block 504. During installation, simply align the slot 502 of the fixing plate 501 with the locking block 504 of the mounting plate 505 and engage them to achieve quick fixing of the entire device.

[0030] The dustproof assembly 4 also includes a first magnetic block 404 and a second magnetic block 405. The first magnetic block 404 is fixed to the inner side of the mating edge of the transparent dust cover 401, and the second magnetic block 405 is fixed to the inner side of the mating edge of the dust cover 402. When the dust cover 402 is closed, the position of the second magnetic block 405 corresponds exactly to the position of the first magnetic block 404. The two magnetic blocks attract each other through magnetism, providing a self-locking closing force for the dust cover 402 without additional buckles, thus ensuring the airtightness of the housing.

[0031] The first magnetic block 404 is fixed to the inner side of the mating edge of the transparent dust cover 401, and the second magnetic block 405 is fixed to the inner side of the mating edge of the dust cover 402. In the closed state, the positions of the first magnetic block 404 and the second magnetic block 405 correspond one-to-one. The first magnetic block 404 and the second magnetic block 405 attract each other through magnetism, stably adsorbing and fixing the dust cover 402 onto the transparent dust cover 401, ensuring the airtightness of the shell and preventing accidental opening.

[0032] At the same time, such as Figure 2As shown, in order to facilitate the operator to open the dust cover 402 for maintenance, a pull ring 406 is also provided on the outer surface of the dust cover 402. The operator can pull the pull ring 406 to overcome the magnetic attraction between the first magnetic block 404 and the second magnetic block 405, and smoothly open the dust cover 402 around the hinge 403.

[0033] In addition, to address the potential heat dissipation issues caused by the sealed casing, such as Figure 2 and Figure 3 As shown, multiple evenly distributed heat dissipation holes 407 are also provided on the wall of the transparent dust cover 401. While enabling air circulation between the inside and outside, the heat dissipation holes 407 ensure that the heat generated by the internal arc extinguishing cover 1 during operation can be dissipated in time, thus avoiding the accumulation of heat that may affect the performance of the equipment.

[0034] In a preferred embodiment, in order to achieve rapid installation and stable fixation of the entire device, the fixing plate 501 is fixedly connected to the outer wall of the arc extinguishing cover 1 by the fixing column 503. This connection method provides basic support for the installation of the entire dustproof assembly 4.

[0035] Furthermore, to achieve a quick-locking function, the slot 502 specifically has a large circular engagement area and a narrow locking area extending along the direction of gravity. During installation, the operator holds the entire device, aligns the large circular engagement area of ​​the slot 502 on the fixing plate 501 with the locking block 504 on the mounting plate 505, and inserts it easily. Since the inner diameter of the large circular engagement area is larger than the outer diameter of the head of the locking block 504, it can be easily inserted. After insertion, under the action of the device's own gravity, the fixing plate 501 will naturally slide downward, causing the neck of the locking block 504 to slide into and lock into the narrow locking area below the slot 502. The width of the narrow locking area is matched with the diameter of the neck of the locking block 504, thereby achieving reliable axial and radial limiting and completing the quick installation and locking of the entire device.

[0036] Working principle: During the installation process, the mounting plate 505 with the locking block 504 is first fixed to the working position such as the back panel of the electrical control cabinet. Then, the operator holds the arc extinguishing structure body that integrates the dustproof component 4 and the fixing plate 501, aligns the large circular locking area of ​​the slot 502 on the fixing plate 501 with the locking block 504 on the mounting plate 505 and puts it in. Under the action of gravity, the fixing plate 501 drives the entire device to slide down naturally in the direction of gravity, so that the neck of the locking block 504 enters and locks in the narrow locking area of ​​the slot 502, thereby completing the installation quickly and stably.

[0037] When the equipment needs to disconnect the circuit, the drive bracket 3 separates the moving contact 2 from the stationary contact (not shown in the figure). The electric arc generated between the two is introduced into the arc extinguishing hood 1 above under the action of electrodynamic force to extinguish it. During the entire disconnection process, the shell composed of the transparent dust cover 401 and the dust cover 402 can effectively prevent external dust and impurities from entering and affecting the arc extinguishing effect. At the same time, the heat dissipation holes 407 on the transparent dust cover 401 can ensure that the heat generated by the arc extinguishing hood 1 during operation is dissipated in time.

[0038] When the internal arc-extinguishing cover 1 needs to be inspected and maintained, the operator can directly pull the pull ring 406 on the dust cover 402 to overcome the magnetic attraction between the first magnetic block 404 and the second magnetic block 405, and open the dust cover 402 conveniently through the hinge 403 to carry out the inspection and maintenance work. After the inspection and maintenance is completed, the dust cover 402 is closed, and the first magnetic block 404 and the second magnetic block 405 will automatically attract each other to pull the dust cover 402 back to its original position, maintaining the protective state of the equipment.

Claims

1. An arc-extinguishing structure for an electronic contactor, comprising: Arc-extinguishing shield (1); The moving contact (2) is located below the arc-extinguishing cover (1); The bracket (3) is fixedly connected to the lower part of the moving contact (2), characterized in that, The arc-extinguishing structure of the electronic contactor also includes a dustproof component (4), which includes a transparent dustproof cover (401) covering the arc-extinguishing cover (1) and the moving contact (2). A dust cover (402) is rotatably connected to one side of the transparent dust cover (401) via a hinge (403). The dust cover (402) and the transparent dust cover (401) together constitute a housing for covering the arc-extinguishing cover (1) and the moving contact (2).

2. The arc-extinguishing structure for an electronic contactor according to claim 1, characterized in that, A first magnetic block (404) is fixed to the inner side of the mating edge of the transparent dust cover (401); a second magnetic block (405) is fixed to the inner side of the mating edge of the dust cover (402), and the second magnetic block (405) and the first magnetic block (404) are magnetically attracted to each other.

3. An arc-extinguishing structure for an electronic contactor according to claim 1 or 2, characterized in that, The outer surface of the dust cover (402) is provided with a pull ring (406).

4. The arc-extinguishing structure for an electronic contactor according to claim 1, characterized in that, The inner wall of the transparent dust cover (401) is provided with multiple heat dissipation holes (407).

5. The arc-extinguishing structure for an electronic contactor according to claim 1, characterized in that, The electronic contactor arc extinguishing structure also includes a mounting assembly (5), which includes a fixing plate (501) fixedly connected to the transparent dust cover (401).

6. The arc-extinguishing structure for an electronic contactor according to claim 5, characterized in that, The fixing plate (501) is fixedly connected to the outer wall of the arc extinguishing cover (1) by the fixing column (503).

7. The arc-extinguishing structure for an electronic contactor according to claim 5, characterized in that, The mounting assembly (5) further includes a mounting plate (505), the surface of which is fixed with a clip (504).

8. The arc-extinguishing structure for an electronic contactor according to claim 7, characterized in that, The inner wall of the fixing plate (501) is provided with a slot (502), the slot (502) has a large circular engagement area and a narrow locking area, and the locking block (504) is adapted to engage with the large circular engagement area of ​​the slot (502) and slide down to the narrow locking area.

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