An arc extinguishing chamber cover plate locking mechanism

Abstract

This utility model provides a locking mechanism for an arc-extinguishing chamber cover plate, relating to the field of power equipment. It includes a cover plate structure mounted on the outer shell of the arc-extinguisher. The cover plate structures are symmetrically arranged at the upper and lower ends of the outer shell. One end of the cover plate structure faces the outer shell and is equipped with a compression spring. The compression spring operates through the squeezing action of the cover plate structure. Limiting inner cylinders are provided at both the upper and lower ends of the inner wall of the outer shell to restrict the squeezing action of the cover plate structure. This application utilizes the cooperation of the connecting inner cylinder, locking shaft, and locking groove, as well as the interaction of the squeezing structure, compression spring, and squeezing element. During installation, simply aligning the cover plate with the outer shell, inserting it, and rotating it completes the locking process. Compared to the traditional method of fixing with multiple bolts, this significantly reduces installation time and improves the assembly efficiency of the arc-extinguishing chamber, especially during emergency maintenance or when rapid replacement of the arc-extinguishing chamber is required, enabling quick operation.

Description

Technical Field

[0001] This utility model relates to the field of power equipment, and in particular to a locking mechanism for an arc-extinguishing chamber cover. Background Technology

[0002] In power equipment and switchgear, the arc-extinguishing chamber is a crucial component, responsible for effectively extinguishing electric arcs during circuit switching, thereby protecting equipment and personnel safety. An arc-extinguishing chamber typically consists of a cover plate, an outer shell, and an internal arc-extinguishing medium. The connection and locking mechanism between the cover plate and the outer shell has a significant impact on the performance and reliability of the arc-extinguishing chamber.

[0003] Traditional methods of connecting the arc-extinguishing chamber cover plate to the outer shell are often quite complex. Multiple bolts are typically used for fixing, requiring operators to tighten each bolt individually during installation. In emergency situations, such as power system failures necessitating rapid arc-extinguishing chamber repair, traditional assembly methods cannot meet time constraints. Furthermore, in routine maintenance and repair work, the frequent disassembly and reassembly of the cover plate becomes extremely time-consuming and labor-intensive due to the complex locking mechanism, reducing installation efficiency.

[0004] To address the aforementioned issues, this invention proposes a locking mechanism for the arc-extinguishing chamber cover, enabling the cover to be easily and quickly assembled with the outer shell, thus achieving rapid assembly between the cover and the outer shell. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a locking mechanism for the arc-extinguishing chamber cover. Through the cooperation of the connecting inner cylinder, locking shaft, and locking groove, as well as the interaction of the extrusion structure, compression spring, and extrusion component, the cover is simply aligned with the outer shell during installation, inserted, and then rotated to lock. Compared to the traditional method of fixing with multiple bolts, this significantly reduces installation time and improves the assembly efficiency of the arc-extinguishing chamber, especially enabling rapid operation during emergency maintenance or when quick replacement of the arc-extinguishing chamber is required.

[0006] To solve the above-mentioned technical problems, this utility model solves the problem of inconvenient and quick assembly between the cover plate and the outer shell in the arc-extinguishing chamber cover plate locking mechanism through the following technical solution.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A locking mechanism for an arc-extinguishing chamber cover includes a cover structure disposed on the outer shell of the arc-extinguisher. The cover structure is symmetrically arranged at the upper and lower ends of the outer shell of the arc-extinguisher. One end of the cover structure faces the cover structure and is provided with a compression spring. The compression spring operates by the squeezing action of the cover structure. Limiting inner cylinders are provided at both the upper and lower ends of the inner cylinder wall of the outer shell of the arc-extinguisher to limit the squeezing action of the cover structure. Locking shafts are provided around the cover structure. Locking grooves are opened around the inner walls of the upper and lower cylinder openings of the outer shell of the arc-extinguisher, and the locking shafts can be rotatably engaged in them.

[0009] Preferably, the cover plate structure includes a cover plate body, a connecting inner cylinder, and a pressing structure. The cover plate body, the connecting inner cylinder, and the pressing structure are designed as an integral structure and are assembled with the arc extinguisher shell body. An outer stabilizing protrusion is connected to the outer wall of the limiting inner cylinder and is engaged with the inside of the arc extinguisher shell body.

[0010] Preferably, the arc extinguisher housing body has built-in grooves at the upper and lower cylinder openings, and the connecting inner cylinder can move and rotate inside the built-in grooves, so that the locking shaft can enter along the locking groove and rotate to engage inside the locking groove.

[0011] Preferably, the inner cylinder of the limiting device has an inner groove so that the compression spring can be surrounded therein. One end of the inner groove is welded to the inner wall of the inner groove, and the other end is welded to an extrusion member. The extrusion member is subjected to the extrusion of the extrusion structure in the cover plate structure. The contact area between the connecting inner cylinder and the extrusion structure is set to be equal.

[0012] Preferably, the locking groove is configured in an L-shape.

[0013] Preferably, a sealing ring is provided between the cover plate body and the built-in groove for sealing.

[0014] Preferably, one end of the sealing ring is engaged in a groove on the outer ring of the cover plate body, and the other end is in contact with the inner wall of the built-in groove.

[0015] Preferably, the outer diameter of the connecting inner cylinder is larger than that of the extrusion structure, and the diameter of the extrusion structure is larger than that of the cover plate body.

[0016] Preferably, an extension cylinder is connected to the opening of the cover plate body, and the outer wall of the extension cylinder matches the opening of the arc extinguisher shell body to form a tight fit.

[0017] Preferably, the inner wall of the extension cylinder is uniformly provided with anti-slip grooves.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The arc-extinguishing chamber cover locking mechanism provided in this application, through the cooperation of the connecting inner cylinder, locking shaft and locking groove, and the interaction of the extrusion structure, compression spring and extrusion component, allows for locking during installation simply by aligning the cover with the outer shell, inserting it, and then rotating it. Compared with the traditional method of fixing with multiple bolts, this greatly reduces installation time and improves the assembly efficiency of the arc-extinguishing chamber, especially in emergency maintenance or when the arc-extinguishing chamber needs to be replaced quickly, enabling rapid operation.

[0020] The disassembly process is equally simple. Simply rotate the cover plate in the opposite direction to disengage the locking shaft from the locking groove. With the help of the compression spring, the cover plate can easily pop out, facilitating maintenance and repair operations and significantly reducing equipment downtime.

[0021] The connecting inner cylinder and extrusion structure in the cover plate structure of this application adopt an integrated design, which enhances the overall structural strength of the cover plate and reduces the possibility of components loosening or being damaged due to long-term use.

[0022] The design of the limiting inner cylinder and its internal compression springs and clamping components ensures that all parts can work stably and collaboratively during installation and use. The compression spring provides stable elastic force during locking, ensuring the cover plate is securely locked, and also assists in the cover plate popping out during disassembly, ensuring operational reliability.

[0023] This application utilizes a sealing ring positioned between the cover plate body and the arc extinguisher housing to effectively prevent external dust, moisture, and other impurities from entering the arc extinguishing chamber, ensuring a clean and dry environment inside. Furthermore, one end of the sealing ring is engaged within a groove in the cover plate body, while the other end is in close contact with the inner wall of the groove. This design ensures that the sealing ring is not easily displaced during long-term use, guaranteeing a stable sealing effect.

[0024] This application effectively prevents the cover plate of the arc-extinguishing chamber from being accidentally opened due to vibration or other reasons during operation by rotating the locking shaft in the locking groove. This avoids safety accidents such as arc leakage that may be caused by loosening or falling off of the cover plate structure, and ensures the safety of power equipment and personnel. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0027] Figure 2This is a schematic diagram of the overall disassembled structure of this utility model;

[0028] Figure 3 This is a partial structural diagram showing the disassembled parts of the cover plate structure, the limiting inner cylinder, and the sealing ring of this utility model;

[0029] Figure 4 This is a partial structural diagram of the limiting inner cylinder of this utility model from a bottom view;

[0030] Figure 5 This is a partial structural schematic diagram of the front cross-sectional view of the arc extinguisher housing of this utility model;

[0031] Figure 6 This is a partial structural schematic diagram of the front cross-section of the cover plate structure of this utility model;

[0032] Figure 7 This is a partial structural schematic diagram of the front cross-section of the outer shell and cover plate structure of the arc extinguisher of this utility model.

[0033] Figure 8 This utility model Figure 7 A magnified structural diagram of point A in the middle.

[0034] Drawing number explanation: 1. Arc extinguisher outer shell body; 101. Internal groove; 102. Locking groove; 2. Cover plate structure; 201. Cover plate body; 202. Connecting inner cylinder; 2022. Locking shaft; 2023. Extension cylinder; 203. Extrusion structure; 3. Limiting inner cylinder; 301. Internal groove; 3011. External stabilizing protrusion; 302. Compression spring; 303. Extrusion part; 4. Sealing ring. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings.

[0036] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0037] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0038] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0039] Please see Figure 1 - Figure 8 A locking mechanism for an arc-extinguishing chamber cover includes a cover structure 2 disposed on the outer shell 1 of the arc-extinguisher. The cover structure 2 is symmetrically arranged at the upper and lower ends of the outer shell 1 of the arc-extinguisher. One end of the cover structure 2 faces the cover structure 2 and is provided with a compression spring 302. The compression spring 302 works by the squeezing action of the cover structure 2. The upper and lower ends of the inner wall of the outer shell 1 of the arc-extinguisher are provided with limiting inner cylinders 3 to limit the squeezing action of the cover structure 2. Locking shafts 2022 are provided around the cover structure 2. Locking grooves 102 are opened around the inner walls of the upper and lower cylinder openings of the arc-extinguisher. The locking shafts 2022 can be rotatably engaged in them.

[0040] The arc-extinguishing chamber cover locking mechanism of this application is mainly composed of components such as the arc-extinguishing device outer shell body 1, locking groove 102, cover structure 2, locking shaft 2022, limiting inner cylinder 3, and compression spring 302. The following is a detailed description of the structure and working principle.

[0041] The following is a detailed description of the locking mechanism for the arc-extinguishing chamber cover of this utility model:

[0042] I. Overall structural assembly

[0043] (a) Arc extinguisher housing body 1

[0044] The outer shell 1 of the arc extinguisher is the external supporting structure of the entire arc-extinguishing chamber, and it is usually made of high-strength insulating materials, such as polycarbonate (PC) or epoxy resin. These materials have good insulation properties and mechanical strength, and can withstand the high temperature and high pressure generated during the arc extinguishing process.

[0045] (ii) Cover plate structure 2

[0046] Cover body 201 and connecting inner cylinder 202

[0047] The cover structure 2 includes a cover body 201, a connecting inner cylinder 202, and an extrusion structure 203, which are designed as a single unit. The cover body 201 can be made of metal, such as stainless steel or aluminum alloy, to provide sufficient strength and good heat dissipation.

[0048] The connecting inner cylinder 202 extends from the cover plate body 201 and is made of the same material as the cover plate body 201. The outer diameter of the connecting inner cylinder 202 is larger than that of the extrusion structure 203, and the diameter of the extrusion structure 203 is larger than that of the cover plate body 201. A locking shaft 2022 is provided on the connecting inner cylinder 202 for engaging with the locking groove 102 on the arc extinguisher outer shell body 1 to achieve locking.

[0049] An extension cylinder 2023 is connected to the opening of the cover plate body 201. The outer wall of the extension cylinder 2023 matches and fits tightly with the opening of the arc extinguisher shell body 1, ensuring the stability of the overall assembly of the cover plate structure 2 and the opening of the arc extinguisher shell body 1 during assembly. The inner wall of the extension cylinder 2023 is evenly provided with anti-slip grooves to increase friction and prevent hand slippage during assembly.

[0050] Sealed design

[0051] A sealing ring 4 is provided between the cover plate body 201 and the built-in groove 101 of the arc extinguisher housing body 1 for sealing. One end of the sealing ring 4 is engaged in the groove opened on the outer ring of the cover plate body 201, and the other end is in contact with the inner wall of the built-in groove 101. The sealing ring 4 can be made of high-temperature resistant and aging-resistant rubber material, such as fluororubber, to ensure good sealing performance during long-term use.

[0052] (III) Limiting Inner Cylinder 3

[0053] Structural design

[0054] The limiting inner cylinder 3 is located inside the outer shell 1 of the arc extinguisher, and an inner groove 301 is formed inside it, around which the compression spring 302 is surrounded. One end of the compression spring 302 is welded to the inner wall of the inner groove 301, and the other end is welded to an extrusion member 303. The extrusion member 303 is used to withstand the extrusion of the extrusion structure 203 in the cover plate structure 2.

[0055] One end of the limiting inner cylinder 3 is also provided with an outer stabilizing protrusion 3011, which is used to increase the stability of the limiting inner cylinder 3 within the arc extinguisher outer shell 1. The limiting inner cylinder 3 can be made of the same high-strength insulating material as the arc extinguisher outer shell 1.

[0056] II. Working Principle

[0057] (I) Installation process

[0058] When installing the arc-extinguishing chamber cover, first align the cover structure 2 with the arc-extinguishing device housing body 1. The connecting inner cylinder 202 in the cover structure 2 enters from the built-in groove 101 of the arc-extinguishing device housing body 1. At this time, the locking shaft 2022 on the connecting inner cylinder 202 is inserted along the axial direction of the connecting inner cylinder 202.

[0059] As the inner cylinder 202 moves further in, when the locking shaft 2022 reaches the inner end of the built-in groove 101 and encounters a corner, the extrusion structure 203 of the cover plate structure 2 will extrude the extrusion member 303 in the limiting inner cylinder 3, thereby compressing the compression spring 302.

[0060] Simultaneously, the operator rotates the cover plate structure 2. Since the locking groove 102 is constructed in an L-shape, during the rotation, the locking shaft 2022 will rotate to a lateral position inside the locking groove 102. At this time, the elastic potential energy of the compression spring 302 is released, locking the cover plate structure 2 inside the arc extinguisher housing body 1, achieving rapid installation.

[0061] (II) Disassembly process

[0062] When it is necessary to disassemble the cover plate structure 2, simply rotate the cover plate structure 2 in the opposite direction so that the locking shaft 2022 rotates from the lateral position of the locking groove 102 back to the axial position. Under the action of the compression spring 302, the cover plate structure 2 will automatically pop out a certain distance, and then the cover plate can be easily removed. This is convenient and quick, and greatly improves the assembly and disassembly efficiency of the arc extinguishing chamber cover plate.

[0063] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A locking mechanism for an arc-extinguishing chamber cover plate, characterized in that: The device includes a cover plate structure (2) installed on the outer shell body (1) of the arc extinguisher. The cover plate structure (2) is symmetrically arranged at the upper and lower ends of the outer shell body (1). One end of the cover plate structure (2) faces the cover plate structure (2) and is provided with a compression spring (302). The compression spring (302) works by the squeezing action of the cover plate structure (2). The upper and lower ends of the inner wall of the outer shell body (1) of the arc extinguisher are provided with limiting inner cylinders (3) to limit the squeezing action of the cover plate structure (2). The cover plate structure (2) is provided with locking shafts (2022) around its perimeter. Locking grooves (102) are opened around the inner walls of the upper and lower cylinder openings of the outer shell body (1) of the arc extinguisher and the locking shafts (2022) can be rotated and locked in them.

2. The arc-extinguishing chamber cover locking mechanism according to claim 1, characterized in that: The cover plate structure (2) includes a cover plate body (201), a connecting inner cylinder (202) and an extrusion structure (203). The cover plate body (201), the connecting inner cylinder (202) and the extrusion structure (203) are designed as an integral structure and are assembled with the arc extinguisher shell body (1). The outer wall of the limiting inner cylinder (3) is connected to an outer stabilizing protrusion (3011) and is snapped into the inside of the arc extinguisher shell body (1).

3. The arc-extinguishing chamber cover locking mechanism according to claim 2, characterized in that: The arc extinguisher housing body (1) is provided with built-in grooves (101) at the upper and lower cylinder openings. The connecting inner cylinder (202) can move and rotate inside the built-in groove (101), and the locking shaft (2022) can rotate and engage inside the locking groove (102) after entering along the locking groove (102).

4. The arc-extinguishing chamber cover locking mechanism according to claim 2, characterized in that: The inner groove (3) of the limiting inner cylinder (3) is provided with an inner groove (301) so that the compression spring (302) surrounds it. One end of the inner groove (301) is welded to the inner wall of the inner groove (301), and the other end is welded to an extrusion member (303). The extrusion member (303) is subjected to the extrusion of the extrusion structure (203) in the cover plate structure (2). The contact area between the connecting inner cylinder (202) and the extrusion structure (203) is set to be equal.

5. The arc-extinguishing chamber cover locking mechanism according to claim 1, characterized in that: The locking slot (102) is configured in an L-shape.

6. The arc-extinguishing chamber cover locking mechanism according to claim 3, characterized in that: A sealing ring (4) is provided between the cover plate body (201) and the built-in groove (101) for sealing.

7. The arc-extinguishing chamber cover locking mechanism according to claim 6, characterized in that: One end of the sealing ring (4) is engaged in the groove on the outer ring of the cover plate body (201), and the other end is in contact with the inner wall of the built-in groove (101).

8. The arc-extinguishing chamber cover locking mechanism according to claim 2, characterized in that: The outer diameter of the connecting inner cylinder (202) is larger than that of the extrusion structure (203), and the diameter of the extrusion structure (203) is larger than that of the cover plate body (201).

9. The arc-extinguishing chamber cover locking mechanism according to claim 2, characterized in that: An extension cylinder (2023) is connected to the opening of the cover plate body (201). The outer wall of the extension cylinder (2023) matches the opening of the arc extinguisher shell body (1) to form a tight fit.

10. A locking mechanism for an arc-extinguishing chamber cover plate according to claim 9, characterized in that: The inner wall of the extension cylinder (2023) is uniformly provided with anti-slip grooves.

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