Circuit breaker easy to overhaul

Abstract

The circuit breaker comprises a circuit breaker shell, an upper wiring terminal and a lower wiring terminal are fixedly installed at the top end and the bottom end of the interior of the circuit breaker shell respectively, a static contact is fixedly arranged on one side of the top of the inner wall of the circuit breaker shell, and a sliding groove is fixedly formed in the middle of the top of the inner wall of the circuit breaker shell. The circuit breaker easy to overhaul is characterized in that a sliding groove is formed in the middle of the circuit breaker body, a sliding block is slidably connected in the sliding groove, two lifting blocks are slidably connected in the sliding block, a brush and a scraper are fixedly arranged at the top ends of the two lifting blocks respectively, and rectangular blocks are fixedly arranged at the bottom ends of the two lifting blocks. When the surface of the static contact is abraded and oxidized due to the fact that the static contact is in frequent opening and closing operation of the circuit breaker and is affected by electric arc ablation and the current heat effect, the two lifting blocks can be sequentially ejected out, and the static contact can be cleaned through the scraper and the brush.

Description

Technical Field

[0001] This utility model relates to a circuit breaker, and more particularly to a circuit breaker that is easy to maintain. Background Technology

[0002] In the operation and maintenance of power systems, circuit breakers, as key devices for controlling and protecting electrical equipment, are of paramount importance in terms of reliability and maintainability. Traditional circuit breaker structures often face numerous maintenance challenges in their stationary contact sections after long-term use. During frequent opening and closing operations, the stationary contacts are subjected to arc erosion and current thermal effects, leading to wear, oxidation, and even deformation of the contact surface. However, due to the compact internal layout of traditional circuit breakers, the stationary contacts are often surrounded by complex mechanical structures and electrical connections. During maintenance, technicians need to spend a significant amount of time removing surrounding components to access the stationary contacts. This not only greatly increases the workload and difficulty of maintenance, prolonging maintenance time, but also easily introduces human error during the removal and reinstallation of these components, posing a potential threat to the overall performance and reliability of the circuit breaker. Furthermore, traditional methods of fixing stationary contacts are usually quite complex, involving multiple bolts, nuts, or special snap-fit ​​structures. During disassembly and installation, these small components are easily lost or damaged, further exacerbating the complexity and cost of maintenance.

[0003] Meanwhile, during long-term operation of the arc-extinguishing chamber, the arc-extinguishing medium (such as SF6 gas, vacuum, etc.) inside the chamber gradually deteriorates due to frequent arc interruption. Key components such as the contacts and grid plates also suffer from ablation, wear, and deformation due to the high temperature and high pressure of the arc. However, when maintenance of the arc-extinguishing chamber is required, technicians face numerous difficulties.

[0004] Based on this, an easy-to-maintain circuit breaker is proposed. Utility Model Content

[0005] The purpose of this invention is to provide an easy-to-maintain circuit breaker to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an easy-to-maintain circuit breaker, comprising a circuit breaker housing, a stationary contact fixedly provided on one side of the top of the inner wall of the circuit breaker housing, a sliding groove fixedly provided in the middle of the top of the inner wall of the circuit breaker housing, a slider slidably connected inside the sliding groove, two lifting blocks slidably connected inside the slider, a brush and a scraper fixedly provided at the top of the two lifting blocks respectively, and a rectangular block fixedly provided at the bottom of each of the two lifting blocks.

[0007] As a preferred embodiment of this utility model, a movable part is fixedly provided in the middle of the back of the slider, and the movable part is slidably connected to the slide groove.

[0008] As a preferred technical solution of this utility model, there is sliding friction at the connection between the two lifting blocks and the slider, and the sliding friction is much greater than the weight of the lifting blocks, and a slot is provided in the middle of the two rectangular blocks.

[0009] As a preferred embodiment of this utility model, an upper terminal block and a lower terminal block are fixedly installed at the top and bottom of the circuit breaker housing, respectively.

[0010] As a preferred embodiment of this utility model, two mounting plates are movably connected to the middle of the inner wall of the circuit breaker housing, and a back plate is fixedly connected between the two mounting plates.

[0011] In a preferred embodiment of this utility model, one of the mounting plates is slidably connected to the circuit breaker housing via two sliding plates, and an arc extinguisher is fixedly installed on the back plate.

[0012] In a preferred embodiment of this utility model, a connecting cylinder is fixedly provided in the middle of the mounting plate, and a connecting groove is fixedly provided in the middle of the connecting cylinder.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model sets up a slider that slides inside the slide groove. When the stationary contact is subjected to frequent opening and closing operations of the circuit breaker, and is affected by arc erosion and current heat effect, resulting in wear and oxidation on the contact surface, the two lifting blocks can be pushed out in sequence, and the stationary contact can be cleaned by scraper and brush respectively, so as to repair the stationary contact.

[0015] 2. This utility model uses a mounting plate and a back plate to fix the arc extinguisher on the back plate. When maintenance is required, the arc extinguisher can be brought out by a sliding plate, which carries out the entire structure of the two mounting plates and the back plate, thus facilitating maintenance.

[0016] In summary, the above design eliminates the need to spend a lot of time disassembling surrounding components when inspecting the stationary contacts and arc extinguishers inside the circuit breaker. This not only greatly reduces the workload and difficulty of maintenance and shortens the maintenance time, but also prevents human error during the removal and reinstallation of these components, thus ensuring the overall performance and reliability of the circuit breaker. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2This is a schematic diagram of the two mounting plates of this utility model;

[0019] Figure 3 This is a schematic diagram of the slider structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the connecting cylinder structure of this utility model.

[0021] In the diagram: 1. Circuit breaker housing; 2. Upper terminal block; 3. Lower terminal block; 4. Arc extinguisher; 5. Stationary contact; 6. Slider; 7. Mounting plate; 8. Back plate; 9. Slide plate; 10. Connecting cylinder; 11. Connecting groove; 12. Slide groove; 13. Lifting block; 14. Brush; 15. Scraper; 16. Rectangular block; 17. Slot; 18. Moving part. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-4 This utility model provides a technical solution for an easy-to-maintain circuit breaker:

[0024] Example 1:

[0025] according to Figure 1 and Figure 3 As shown, an easy-to-maintain circuit breaker includes a circuit breaker housing 1. An upper terminal 2 and a lower terminal 3 are fixedly installed at the top and bottom of the circuit breaker housing 1, respectively. A stationary contact 5 is fixedly provided on one side of the top of the inner wall of the circuit breaker housing 1. A sliding groove 12 is fixedly opened in the middle of the top of the inner wall of the circuit breaker housing 1. A slider 6 is slidably connected inside the sliding groove 12. A movable part 18 is fixedly provided in the middle of the back of the slider 6. The movable part 18 is slidably connected to the sliding groove 12. Two lifting blocks 13 are slidably connected inside the slider 6. A brush 14 and a scraper 15 are fixedly provided at the top of the two lifting blocks 13, respectively. The brush 14 and the scraper 15 clean the stationary contact 5 from the ablation caused by the electric arc and the thermal effect of the current, which causes wear and oxidation on the contact surface. A rectangular block 16 is fixedly provided at the bottom of each of the two lifting blocks 13.

[0026] according to Figure 3As shown, there is sliding friction at the connection between the two lifting blocks 13 and the slider 6, and the sliding friction is much greater than the weight of the lifting block 13. This prevents the sliding friction from being too small when the lifting block 13 pushes out the brush 14 and scraper 15, which would cause the entire structure to fall and fail to achieve the cleaning effect. The middle of each of the two rectangular blocks 16 is provided with a slot 17, which makes it easy to insert a screwdriver to drive the rectangular block 16 to rise, thereby driving the lifting block 13 to rise.

[0027] according to Figure 1 , Figure 2 and Figure 4 As shown, two mounting plates 7 are movably connected to the middle of the inner wall of the circuit breaker housing 1. A back plate 8 is fixedly connected between the two mounting plates 7. One of the mounting plates 7 is slidably connected to the circuit breaker housing 1 through two sliding plates 9. The sliding plates 9 allow the two mounting plates 7 and the back plate 8 to slide out easily, similar to a drawer structure, for the arc extinguisher 4 to be inspected. The arc extinguisher 4 is fixedly installed on the back plate 8. A connecting cylinder 10 is fixedly provided in the middle of one of the mounting plates 7. A connecting groove 11 is fixedly opened in the middle of the connecting cylinder 10. The connecting groove 11 facilitates the insertion of a screwdriver to drive the entire structure to slide out.

[0028] In practical use, this utility model of an easy-to-maintain circuit breaker, when being inspected, first disassembles the circuit breaker housing 1. When the stationary contact 5 is affected by arc erosion and current heat effect, causing wear and oxidation on the contact surface, if the wear and oxidation are minor, a screwdriver can be inserted into the slot 17. Then, by turning the screwdriver upwards, the two rectangular blocks 16 move upwards, thereby causing the corresponding lifting block 13 to rise, so that the brush 14 and scraper 15 can clean and maintain the stationary contact 5. If the wear and oxidation at the stationary contact 5 is minor... When the corrosion is severe, it is necessary to disassemble and replace the related components around the stationary contact 5. When the key components of the arc extinguisher 4, such as the contacts and grid plates, are also burned, worn, or deformed due to the high temperature and high pressure impact of the arc, and the arc extinguisher 4 needs to be repaired, a screwdriver is inserted into the connection slot 11 and then pulled outward. The sliding plate 9 drives the two mounting plates 7 and the back plate 8 to move outward, thereby moving the arc extinguisher 4 outward for repair. There is no need to disassemble the arc extinguisher 4 for repair, which makes the repair more efficient.

[0029] In the description of this utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "a solution," "some solutions," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that solution or example is included in at least one solution or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same solution or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more solutions or examples.

Claims

1. An easily serviceable circuit breaker comprising a circuit breaker housing (1), characterized in that: The top of the inside wall of the circuit breaker shell (1) is fixed with a static contact (5), and the middle of the top of the inside wall of the circuit breaker shell (1) is fixed with a sliding groove (12), the inside of the sliding groove (12) is slidably connected with a sliding block (6), the inside of the sliding block (6) is slidably connected with two lifting blocks (13), the top of the two lifting blocks (13) is respectively fixed with a brush (14) and a scraper (15), and the bottom of the two lifting blocks (13) is fixed with a rectangular block (16).

2. The easily serviceable circuit breaker of claim 1, wherein: The middle of the back of the sliding block (6) is fixed with a movable element (18), and the movable element (18) is slidably connected with the sliding groove (12).

3. The easily serviceable circuit breaker of claim 1, wherein: The connection between the two lifting blocks (13) and the sliding block (6) has sliding friction, and the sliding friction is much greater than the gravity of the lifting block (13), and the middle of the two rectangular blocks (16) is provided with a slot (17).

4. The easily serviceable circuit breaker of claim 1, wherein: The top and bottom of the inside of the circuit breaker shell (1) are respectively fixed with an upper terminal (2) and a lower terminal (3).

5. The easily serviceable circuit breaker of claim 1, wherein: The middle of the inside wall of the circuit breaker shell (1) is movably connected with two mounting plates (7), and the two mounting plates (7) are fixedly connected with a back plate (8).

6. The easily serviceable circuit breaker of claim 5, wherein: One of the mounting plates (7) is slidably connected with the circuit breaker shell (1) through two sliding plates (9), and the back plate (8) is fixedly provided with an arc extinguisher (4).

7. The easily serviceable circuit breaker of claim 5, wherein: The middle of one of the mounting plates (7) is fixed with a connecting cylinder (10), and the middle of the connecting cylinder (10) is fixedly provided with a connecting groove (11).

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