Structure for suppressing bounce of circuit breaker

Abstract

The utility model provides a structure for suppressing bounce of a circuit breaker, and belongs to the technical field of high-voltage circuit breakers. Comprising an upper porcelain bottle, an upper outgoing line, an arc extinguish chamber, a lower outgoing line, a lower porcelain bottle and an insulating pull rod, and a bounce buffer suppression assembly is arranged between the upper porcelain bottle and the upper outgoing line and used for absorbing excess energy during switching-on and reducing switching-on bounce time. According to the utility model, the problem that the closing bounce time of the high-voltage circuit breaker exceeds the standard is solved, and on the premise that the mounting structure of the arc extinguish chamber is not changed, redundant energy during closing is absorbed and the closing bounce time is reduced by additionally arranging the bounce buffer suppression assembly on the wire outlet side under the condition that the over-travel of the arc extinguish chamber is not changed; the structure is simple, the reliability is high, the service life of the arc extinguish chamber is effectively prolonged, and the closing stability of the circuit breaker is improved.

Description

Technical Field

[0001] This utility model belongs to the field of high-voltage circuit breaker technology, specifically relating to a structure for suppressing circuit breaker bounce, applicable to high-voltage vacuum circuit breakers, which can effectively reduce the bounce time during closing, improve the life of the arc-extinguishing chamber and system stability. Background Technology

[0002] High-voltage circuit breakers play a crucial role in power systems for overload and short-circuit protection and control. Closing bounce is a common problem with circuit breakers, characterized by the repeated opening and closing of the moving and stationary contacts during closure. Excessive closing bounce time can lead to the following issues:

[0003] 1. Contact erosion: During the bouncing process, the arc is repeatedly extinguished, which accelerates contact wear and reduces the life of the arc-extinguishing chamber;

[0004] 2. Overvoltage hazards: Bounce may cause current-cutting overvoltage or multiple reignition overvoltage, threatening the insulation performance of power equipment;

[0005] 3. Standard restrictions: National standards (such as GB / T 1984) and international standards (such as IEC62271) have strict requirements on the closing bounce time. Exceeding the standard may result in product non-compliance.

[0006] Analysis revealed that the excessive closing bounce time was due to the following: When the circuit breaker closes, the closing power is output by the mechanism and acts on the insulating rod. The insulating rod moves upward and drives the moving conductive rod of the arc-extinguishing chamber to continue moving upward. When closing is completed, if the redundant closing power can be absorbed by the contact spring of the insulating rod, the moving and stationary contacts of the arc-extinguishing chamber will make direct contact and there will be no rebound, thus no closing bounce will occur.

[0007] If the closing redundancy is too high when the circuit breaker closes, exceeding the absorption capacity of the contact springs of the insulating pull rod, and the upper outgoing line and upper porcelain insulator are rigidly connected, and the arc-extinguishing chamber and upper outgoing line are also rigidly connected, the force is transmitted from the insulating pull rod through the arc-extinguishing chamber to the upper outgoing line and upper porcelain insulator. In order to release the excess energy, the moving and stationary contacts of the arc-extinguishing chamber will repeatedly contact and bounce to gradually release the energy. When the energy release is complete, the moving and stationary contacts will no longer contact and bounce. The time for the moving and stationary contacts of the arc-extinguishing chamber to release energy is the closing bounce time of the circuit breaker.

[0008] In existing technologies, contact springs or buffers are typically used to absorb closing energy, but these methods have the following drawbacks: contact springs have limited absorption capacity, and redundant energy may still cause bouncing; traditional buffer structures are complex, difficult to debug, and prone to loosening and failure after long-term use.

[0009] Therefore, there is an urgent need for a solution that is simple in structure, highly reliable, and can effectively suppress closing bounce. Utility Model Content

[0010] The technical problem solved by this utility model is to provide a structure for suppressing circuit breaker bounce. This utility model aims to solve the problem of excessive closing bounce time of high-voltage circuit breakers and provides a structural optimization solution. Without changing the installation structure of the arc-extinguishing chamber, a bounce buffer suppression component is added to the outgoing side. While ensuring that the overtravel of the arc-extinguishing chamber remains unchanged, the redundant energy during closing is absorbed, thereby reducing the closing bounce time.

[0011] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0012] The structure used to suppress circuit breaker bounce includes an upper porcelain insulator, upper outgoing line, arc-extinguishing chamber, lower outgoing line, lower porcelain insulator, and insulating tie rod.

[0013] A bounce buffer suppression component is provided between the upper porcelain insulator and the upper outgoing line. The bounce buffer suppression component is used to absorb excess energy during closing and reduce the closing bounce time.

[0014] Further defining the above solution, the bounce buffer suppression assembly includes a bolt, a compression spring, a flat washer, a nut, and a spring washer, wherein:

[0015] The bolt passes through the mounting holes of the upper porcelain insulator and the upper outgoing wire.

[0016] The compression spring is sleeved on the bolt and located at the lower part of the upper porcelain bottle connection;

[0017] The flat pads are respectively disposed at the upper and lower ends of the compression spring to prevent the compression spring from sinking into the mounting hole;

[0018] A flat washer is also provided between the nut of the bolt and the upper lead wire;

[0019] The nut and spring washer constitute a nut anti-loosening structure, which is fastened to the end of the bolt to press the compression spring.

[0020] As a further limitation of the above scheme, the stiffness of the compression spring is adjustable to adapt to the absorption requirements of different closing energy.

[0021] To further define the above scheme, the compression spring is a combination of multiple springs with different stiffnesses to absorb the closing impact energy in stages.

[0022] To further define the above solution, the bolt is tightened by using two nuts and a spring washer to form a double-nut anti-loosening structure, ensuring long-term operational stability.

[0023] Further defining the above scheme, the upper porcelain insulator is equipped with an arc-extinguishing chamber, and the upper outgoing line is rigidly connected to the arc-extinguishing chamber; the lower part of the upper porcelain insulator is connected to the lower outgoing line, and the lower outgoing line is connected to the lower porcelain insulator; the lower porcelain insulator is equipped with an insulating pull rod, and the moving conductive rod of the arc-extinguishing chamber is connected to the insulating pull rod. When the circuit is closed, the insulating pull rod drives the arc-extinguishing chamber to move, and the redundant energy is consumed through the vibration of the compression spring.

[0024] Advantages of this utility model compared to the prior art:

[0025] 1. This solution effectively suppresses bounce: By absorbing redundant energy through a compression spring, the closing bounce time is significantly reduced, which meets national standards;

[0026] 2. This solution has a simple and reliable structure: it is assembled using standard parts (bolts, flat washers, double nuts), making it easy to manufacture and maintain;

[0027] 3. This solution has wide adaptability: the spring stiffness is adjustable, making it suitable for circuit breakers of different specifications;

[0028] 4. Long-term stability of this solution: The double-nut anti-loosening structure prevents bolts from loosening, ensuring long-term operational reliability;

[0029] 5. This solution has strong compatibility: it does not require changes to the original structure of the arc-extinguishing chamber, making it easy to upgrade existing products. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the primary circuit structure of this utility model;

[0031] Figure 2 This utility model Figure 1 An enlarged schematic diagram of the bounce buffer suppression component shown in section A. Detailed Implementation

[0032] 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 scope of protection of the present utility model.

[0033] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0035] Please see Figure 1-2 The embodiments of this utility model are described in detail below.

[0036] Example: Structure for suppressing circuit breaker bounce, see reference. Figure 1 As shown, it includes an upper porcelain insulator 1, an upper outgoing line 2, an arc-extinguishing chamber 3, a lower outgoing line 4, a lower porcelain insulator 5, and an insulating pull rod 6. A bounce buffer suppression component is provided between the upper porcelain insulator 1 and the upper outgoing line 2. The bounce buffer suppression component is used to absorb excess energy during closing and reduce the closing bounce time.

[0037] This embodiment is designed to allow energy to be released at the upper porcelain insulator and upper outgoing line when there is a large redundancy in the closing power, thereby reducing the bounce time of the arc-extinguishing chamber.

[0038] In one specific implementation, see Figure 2 As shown, the bounce buffer suppression assembly includes an M10 bolt 7, a compression spring 8, a flat washer 9, a nut 10, and a spring washer 11, wherein: the bolt 7 passes through the mounting holes of the upper porcelain insulator 1 and the upper outlet 2; the compression spring 8 is sleeved on the bolt 7 and located at the lower part of the connection of the upper porcelain insulator 1; the flat washer 9 is respectively set at the upper and lower ends of the compression spring 8 to prevent the compression spring 8 from sinking into the mounting hole; a flat washer 9 is also provided between the nut of the bolt 7 and the upper outlet 2; the nut 10 and the spring washer 11 constitute a nut anti-loosening structure, which is fastened to the end of the bolt 7 to press the compression spring 8.

[0039] In this embodiment, there is still redundant energy during the closing process. At this time, the moving conductive rod of the arc-extinguishing chamber 3 continues to move upward. When the moving and stationary contacts of the arc-extinguishing chamber 3 come into contact, the force is transmitted from the arc-extinguishing chamber 3 to the upper outgoing line 2. Since the M10 bolt 7 between the upper outgoing line 2 and the upper porcelain insulator 1 contains a compression spring 8, the energy will be consumed by the vibration of the compression spring 8, thereby reducing the bounce of the moving and stationary contacts on the arc-extinguishing chamber 3.

[0040] Preferably, the stiffness of the compression spring 8 is adjustable to adapt to the absorption requirements of different closing energy.

[0041] Preferably, the compression spring 8 is a combination of multiple springs with different stiffnesses to absorb the closing impact energy in stages.

[0042] Preferably, the bolt 7 is fastened by using two nuts 10 and a spring washer 11 to form a double-nut anti-loosening structure, which can effectively prevent the M10 bolt from loosening and ensure long-term operational stability.

[0043] In one specific embodiment, the upper porcelain insulator 1 is provided with an arc-extinguishing chamber 3 inside, and the upper outgoing line 2 is rigidly connected to the arc-extinguishing chamber 3; the lower part of the upper porcelain insulator 1 is connected to the lower outgoing line 4, the lower outgoing line 4 is connected to the lower porcelain insulator 5, the lower porcelain insulator 5 is provided with an insulating pull rod 6 inside, the moving conductive rod of the arc-extinguishing chamber 3 is connected to the insulating pull rod 6, when the circuit is closed, the insulating pull rod 6 drives the arc-extinguishing chamber 3 to move, and the redundant energy is dissipated through the vibration of the compression spring 8.

[0044] The installation and use principle of this utility model:

[0045] 1. Assemble the bounce buffer suppression assembly: Pass the M10 bolt 7 through the mounting holes of the upper porcelain insulator 1 and the upper cable outlet 2; install the flat washer 9, the compression spring 8, and the flat washer 9 in sequence on the bolt 7; tighten with the double nut 10 and the spring washer 11 to ensure that it is not loose.

[0046] 2. Energy absorption during closing: When closing, the insulating rod 6 pushes the arc-extinguishing chamber 3 to close; if the energy exceeds the absorption capacity of the contact spring, the redundant energy is consumed by the vibration of the compression spring 8; the deformation of the compression spring 8 buffers the impact force and reduces the bouncing of the moving and stationary contacts.

[0047] 3. Debugging and optimization: The stiffness of the compression spring 8 can be adjusted according to the actual working conditions to optimize the bounce suppression effect; the tightness of the double nuts 10 should be checked regularly to ensure long-term stable operation.

[0048] This invention solves the problem of excessive closing bounce time in high-voltage circuit breakers. Without changing the installation structure of the arc-extinguishing chamber, a bounce buffer suppression component is added to the outgoing line side. This absorbs redundant energy during closing and reduces the closing bounce time while ensuring that the overtravel of the arc-extinguishing chamber remains unchanged.

[0049] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0050] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A structure for suppressing circuit breaker bounce, comprising an upper porcelain insulator (1), an upper outgoing line (2), an arc-extinguishing chamber (3), a lower outgoing line (4), a lower porcelain insulator (5), and an insulating tie rod (6), characterized in that: A bounce buffer suppression component is provided between the upper porcelain insulator (1) and the upper outgoing line (2). The bounce buffer suppression component is used to absorb excess energy during closing and reduce the closing bounce time. The bounce buffer suppression assembly includes a bolt (7), a compression spring (8), a flat washer (9), a nut (10), and a spring washer (11), wherein: The bolt (7) passes through the mounting holes of the upper porcelain bottle (1) and the upper outlet (2); The compression spring (8) is sleeved on the bolt (7) and located at the lower part of the connection of the upper porcelain bottle (1); The flat pads (9) are respectively set at the upper and lower ends of the compression spring (8) to prevent the compression spring (8) from sinking into the mounting hole; A flat washer (9) is also provided between the nut of the bolt (7) and the upper wire (2). The nut (10) and spring washer (11) constitute a nut anti-loosening structure, which is fastened to the end of the bolt (7) to press the compression spring (8).

2. The structure for suppressing bounce of a circuit breaker according to claim 1, characterized by: The stiffness of the compression spring (8) is adjustable to meet the absorption requirements of different closing energy.

3. The structure for suppressing bounce of a circuit breaker according to claim 1, characterized by: The compression spring (8) is composed of multiple springs with different stiffnesses to absorb the closing impact energy in stages.

4. The structure for suppressing bounce of a circuit breaker according to claim 1, characterized by: The bolt (7) is fastened by using two nuts (10) and a spring washer (11) to form a double nut anti-loosening structure, which ensures long-term operational stability.

5. The structure for suppressing bounce of a circuit breaker according to claim 1, characterized by: The upper porcelain insulator (1) is provided with an arc-extinguishing chamber (3) inside. The upper outgoing line (2) is rigidly connected to the arc-extinguishing chamber (3). The lower part of the upper porcelain insulator (1) is connected to the lower outgoing line (4). The lower outgoing line (4) is connected to the lower porcelain insulator (5). The lower porcelain insulator (5) is provided with an insulating pull rod (6) inside. The moving conductive rod of the arc-extinguishing chamber (3) is connected to the insulating pull rod (6). When the circuit is closed, the insulating pull rod (6) drives the arc-extinguishing chamber (3) to move.

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