Isolation mechanism of high-voltage line control device

Abstract

The invention relates to the technical field of high-voltage vacuum circuit breakers, in particular to an isolation mechanism of a high-voltage line control device, the isolation mechanism of the high-voltage line control device comprises a protective shell, an opening and closing assembly, a first contact finger assembly and a second contact finger assembly, and the opening and closing assembly is arranged in the protective shell. The driving force of an external switching mechanism is received through the rotating shaft, all the clamping pieces installed on the rotating shaft are driven to rotate synchronously, opening and closing actions of the isolation mechanism are achieved, and the on-off function is achieved by combining the rotating clamping pieces with the first contact finger assembly and the second contact finger assembly. A traditional cumbersome knife switch mechanism and a complex spring operation mechanism are replaced, the structure is more compact, the number of parts is smaller, debugging is simpler, installation is more stable, through modular design, the protective shell serves as a basic frame, the opening and closing assembly, the contact finger assembly and the insulation component are integrated, on-off control and insulation protection of a circuit are achieved, and the reliability of the circuit is improved. The problems that traditional springs and knife switch mechanisms have many parts and are large in size are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage vacuum circuit breakers, and in particular to an isolation mechanism of a high-voltage line control device. Background Art

[0002] High-voltage line control devices, namely vacuum circuit breakers, are power distribution devices in three-phase AC systems. They can be used to protect and control electrical equipment in industrial and mining enterprises, power plants, and substations. They are particularly suitable for use in places that require oil-free operation, low maintenance, and frequent operation. Circuit breakers can be configured in center cabinets, double-layer cabinets, and fixed cabinets to control and protect high-voltage electrical equipment.

[0003] Publication number CN118116767A discloses a locking mechanism for an electric isolating segmentation device, comprising: a limit assembly connected to a first rotating shaft; a positioning assembly mounted on a mounting frame; a limit wheel connected to a second rotating shaft; and a positioning wheel mounted on the first rotating shaft. By inserting a locking link on the limit assembly into a limit hole on the limit wheel, the second rotating shaft is prevented from rotating, preventing the earthing switch from closing. The earthing switch can be limited. A guide rod on the positioning assembly is fixed above a positioning baffle, preventing the positioning wheel from rotating clockwise, preventing the isolating switch from closing. The isolating switch can be limited to avoid accidental closure of the isolating switch, thereby ensuring the safety of electrical workers. However, the isolation mechanisms used in existing outdoor high-voltage vacuum circuit breakers are mostly composed of a spring mechanism and a knife mechanism. Due to the large number of components in the spring mechanism, mechanism debugging is cumbersome, and the knife mechanism is bulky, affecting installation stability. Summary of the Invention

[0004] The present invention aims to solve the problem in the prior art that the isolation mechanism used in outdoor high-voltage vacuum circuit breakers is mostly composed of a spring mechanism and a knife mechanism. Due to the large number of parts in the spring mechanism, the mechanism debugging is relatively complicated, and the knife mechanism is large in size, which affects the installation stability. The present invention provides an isolation mechanism for a high-voltage line control device with a protective shell as the basic framework, integrating an opening and closing component, a contact finger component and an insulating component to achieve circuit on-off control and insulation protection, thereby solving the problem of the large number of parts and large size of traditional spring and knife mechanisms.

[0005] To achieve the above objectives, the present invention proposes an isolation mechanism for a high-voltage line control device, comprising a protective housing, an opening and closing assembly, a first contact assembly, and a second contact assembly. The opening and closing assembly is disposed within the protective housing; the first contact assembly is mounted on one side of the opening and closing assembly; the second contact assembly is mounted on the other side of the opening and closing assembly; the opening and closing assembly includes a rotating shaft, on which a plurality of clamping members are mounted;

[0006] The rotating shaft is used to drive the clamping member to rotate, so as to achieve contact or disconnection between the clamping member and the first contact finger assembly and the second contact finger assembly.

[0007] As a further description of the above technical solution: the clamping member includes a rotating opening and closing plate, which is detachably connected to the rotating shaft through a fixed plate, one end of the rotating opening and closing plate is detachably connected to a first clamping jaw, and the other end of the rotating opening and closing plate is detachably connected to a second clamping jaw.

[0008] As a further description of the above technical solution: the first contact finger assembly includes a first contact finger seat, the upper end of the first contact finger seat is connected to the first connecting rod, the first connecting rod is sleeved with a first mounting sleeve, and the first mounting sleeve is mounted on the protective shell.

[0009] As a further description of the above technical solution: the second contact finger assembly includes a second contact finger seat, the upper end of the second contact finger seat is connected to the second connecting rod, the second connecting rod is sleeved with a second mounting sleeve, and the second mounting sleeve is mounted on the protective shell.

[0010] As a further description of the above technical solution: the first clamping jaw includes a first clamping plate and a second clamping plate, and the first clamping plate and the second clamping plate are connected to both sides of the end of the rotating opening and closing plate by bolts.

[0011] As a further description of the above technical solution: the second clamping jaw has the same structure as the first clamping jaw.

[0012] As a further description of the above technical solution: pads are provided on the inner sides of the first and second splints.

[0013] As a further description of the above technical solution: elastic pressure plates are provided on the outer sides of the first clamping plate and the second clamping plate.

[0014] As a further description of the above technical solution: a limiting plate and a reinforcement plate are provided inside the protective shell.

[0015] As a further description of the above technical solution: three of each of the first contact finger assembly, the second contact finger assembly and the clamping member are provided.

[0016] The above technical solution has the following advantages or beneficial effects:

[0017] The present invention receives the driving force of the external switch mechanism through the rotating shaft, drives all the clamping parts installed thereon to rotate synchronously, realizes the opening and closing actions of the isolation mechanism, and realizes the on-off function by adopting the rotating clamping part in combination with the first contact finger assembly and the second contact finger assembly, replacing the traditional bulky knife switch mechanism and the complex spring operating mechanism. The structure is more compact, with fewer parts, simpler debugging and more stable installation. Through modular design, with the protective shell as the basic framework, the opening and closing components, contact finger assemblies and insulating components are integrated to realize the on-off control and insulation protection of the circuit, solving the problem of the traditional spring and knife switch mechanism with many parts and large size. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of an isolation mechanism in one embodiment of the present invention Figure 1 ;

[0019] Figure 2 A schematic diagram of the structure of an isolation mechanism in one embodiment of the present invention Figure 2 ;

[0020] Figure 3 A schematic diagram of the internal structure of an isolation mechanism in an embodiment of the present invention;

[0021] Figure 4 A side view of the internal structure of the isolation mechanism in one embodiment of the present invention;

[0022] Figure 5 for Figure 1 Schematic diagram of the structure of the middle opening and closing component;

[0023] Figure 6 for Figure 1 Main view of the middle opening and closing assembly;

[0024] Figure 7 for Figure 5 Schematic diagram of the structure of the middle clamping member;

[0025] Figure 8 for Figure 7 A partial enlarged view of point A in the middle.

[0026] Legend:

[0027] 1. Protective shell; 2. Opening and closing assembly; 3. First contact finger assembly; 4. Second contact finger assembly; 5. Limiting plate; 6. Reinforcement plate; 7. Insulating sleeve; 8. Insulating sleeve; 9. Insulating isolation piece; 21. Rotating shaft; 22. Clamping piece; 221. Rotating opening and closing plate; 222. Fixed plate; 223. First clamping jaw; 224. Second clamping jaw; 2231. First clamping plate; 2232. Second clamping plate; 2233. Bolt; 2234. Spacer; 2235. Elastic pressure plate; 31. First contact finger seat; 32. First connecting rod; 33. First mounting sleeve; 41. Second contact finger seat; 42. Second connecting rod; 43. Second mounting sleeve; 91. First isolation disc; 92. Second isolation disc. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0031] See also Figure 1-8 The present invention provides a technical solution: the isolation mechanism of the high-voltage line control device of the present invention includes a protective shell 1, an opening and closing assembly 2, a first contact assembly 3 and a second contact assembly 4, the opening and closing assembly 2 is arranged inside the protective shell 1; the first contact assembly 3 is installed on one side of the opening and closing assembly 2; the second contact assembly 4 is installed on the other side of the opening and closing assembly 2; the opening and closing assembly 2 includes a rotating shaft 21, and a plurality of clamping members 22 are installed on the rotating shaft 21; wherein the rotating shaft 21 is used to drive the clamping members 22 to rotate, so as to realize contact or disconnection between the clamping members 22 and the first contact assembly 3 and the second contact assembly 4.

[0032] In the technical solution of the present invention, the protective shell 1 provides a mounting base for the internal components, and the rotating shaft 21 receives the driving force of the external switch mechanism, driving all the clamping members 22 installed thereon to rotate synchronously, thereby realizing the opening and closing actions of the isolation mechanism. In the closed state, it rotates to a specific position, and the claws at both ends of the clamping member 22 respectively reliably clamp the first contact finger assembly 3 and the second contact finger assembly 4, forming a complete current path from the vacuum tube base to the outgoing conductive rod. In the open state, it rotates to another position, and the claws at both ends of the clamping member 22 are completely separated from the first contact finger assembly 3 and the second contact finger assembly 4, forming a visible electrical isolation fracture that meets safety standards. By using the rotating clamping member 22 in combination with the first contact finger assembly 3 and the second contact finger assembly 4 to achieve the on-off function, it replaces the traditional bulky knife switch mechanism and complex spring operating mechanism, with a more compact structure, fewer parts, simpler debugging, and more stable installation. Through modular design, with the protective shell as the basic framework, the opening and closing components, contact components and insulating components are integrated to achieve circuit on-off control and insulation protection, solving the problems of traditional spring and knife switch mechanisms with many components and large size.

[0033] Among them, the clamping member 22 is a key component that directly executes current on and off. It is made of conductive metal material. The opening and closing component 2 is connected to the switch mechanism of the high-voltage line control device, the first contact finger component 3 is connected to the vacuum tube base body of the high-voltage line control device, and the second contact finger component 4 is connected to the outgoing conductive rod of the high-voltage line control device.

[0034] Specifically, the entire isolation mechanism formed by the protective shell 1 and the internal components is installed inside the high-voltage line control device as a relatively independent module. By forming a standardized interface between it and the circuit breaker body, this greatly facilitates maintenance and replacement, and also enables the isolation mechanism to be adapted to other types of switchgear, thereby improving versatility and interchangeability.

[0035] like Figure 5 and Figure 6 As shown, an insulating sleeve 7 is installed on the rotating shaft 21, an insulating sleeve 8 is installed on each clamping member 22, and insulating isolation members 9 connected to the insulating sleeve 7 are provided on both sides of the clamping member 22.

[0036] Specifically, the insulating sleeve 7 is installed on the rotating shaft 21 to isolate the rotating shaft 21 and the clamping member 22, preventing the current from being conducted through the rotating shaft 21 or leaking to the ground, while providing rotation support. The insulating sleeve 8 is installed on each clamping member 22 to isolate the clamping member 22 and the rotating shaft 21, thereby enhancing the insulation performance of the main circuit. The insulating isolation member 9 provides a key three-phase insulation protection structure, which is installed on both sides of the clamping member 22 and connected to the insulating sleeve 7.

[0037] The insulating isolator 9 includes a first isolating disc 91 and a second isolating disc 92. The first isolating disc 91 is located between the second isolating disc 92 and the clamping member 22, and the diameter of the first isolating disc 91 is smaller than that of the second isolating disc 92. Because the first isolating disc 91 and the second isolating disc 92 are made of insulating material, the first isolating disc 91 has a smaller diameter and is located between the clamping member 22 and the second isolating disc 92; the second isolating disc 92 has a larger diameter. Phase isolation forms a physical barrier between two adjacent clamping members (representing phases A, B, and C). The small disc 91 is close to the conductive member, and the large disc 92 is on the outside. This double-layer, large-small disc design greatly increases the creepage distance along the surface of the insulating member, improving insulation. The increased creepage distance and physical isolation effectively prevent surface flashover or air breakdown between phases, significantly improving the withstand voltage capability (power frequency withstand voltage and impulse withstand voltage) of the isolation fracture and adjacent phases, ensuring safe and reliable operation in high-voltage environments.

[0038] like Figure 3 and Figure 4 As shown, the clamping member 22 includes a rotating opening and closing plate 221, which is detachably connected to the rotating shaft 21 through a fixed plate 222. One end of the rotating opening and closing plate 221 is detachably connected to a first clamping jaw 223, and the other end of the rotating opening and closing plate 221 is detachably connected to a second clamping jaw 224; the rotating opening and closing plate 221 is detachably mounted on the rotating shaft 21 through the fixed plate 222, so that its rotation directly drives the clamping jaws at both ends to move, and the first clamping jaw 223 and the second clamping jaw 224 are located at both ends of the rotating opening and closing plate 221, directly clamping parts of the first contact finger assembly 3 and the second contact finger assembly 4.

[0039] The second clamping jaw 224 has the same structure as the first clamping jaw 223 .

[0040] like Figure 3 and Figure 4 As shown, the first contact assembly 3 includes a first contact base 31, the upper end of which is connected to a first connecting rod 32. A first mounting sleeve 33 is sleeved on the first connecting rod 32, and the first mounting sleeve 33 is mounted on the protective shell 1. The first contact base 31 is fixedly mounted on the protective shell. As one of the fixed end contacts of the current path, the contact base 31 and the vacuum tube base body are connected through the first connecting rod 32, and are responsible for conducting current from the vacuum interrupter (connected to the base) to the contact base 31. The first mounting sleeve 33 is sleeved on the first connecting rod 32 and fixed to the protective shell 1, providing support, fixation, and insulation, ensuring that the first connecting rod 32 and the contact base 31 are in a stable and reliable position and are insulated from the protective shell 1.

[0041] like Figure 3 and Figure 4As shown, the second contact assembly 4 includes a second contact base 41. The upper end of the second contact base 41 is connected to a second connecting rod 42. A second mounting sleeve 43 is sleeved on the second connecting rod 42. The second mounting sleeve 43 is mounted on the protective housing 1. The second contact base 41 is fixedly mounted on the protective housing 1 and serves as the other fixed end contact of the current path. The second connecting rod 42 connects the contact base 41 and the output conductive rod. The current is conducted from the contact base 41 to the external circuit (via the output conductive rod). The second mounting sleeve 43 functions similarly to the first mounting sleeve 33, supporting, fixing, and insulating the second connecting rod 42 and the contact base 41.

[0042] like Figure 7 and Figure 8 As shown, the first clamping jaw 223 includes a first clamping plate 2231 and a second clamping plate 2232, which are connected to the ends of the rotating opening and closing plate 221 via bolts 2233. The first clamping plate 2231 and the second clamping plate 2232 constitute the main clamping surface of the clamping jaw, which is detachably connected to the ends of the rotating opening and closing plate 221 via bolts 2233. The detachable design facilitates adjustment and replacement. The bolts 2233 facilitate the installation and removal of the first clamping plate 2231 and the second clamping plate 2232.

[0043] like Figure 7 and Figure 8 As shown, pads 2234 are provided on the inner sides of both the first and second clamping plates 2231, 2232. Pads 2234 are mounted on the inner sides of the first and second clamping plates 2231, 2232. Adjustment and compensation are possible. By adjusting the thickness or position of pads 2234, the clamping position and force of the clamping jaws can be fine-tuned, effectively eliminating any manufacturing or installation errors of the static contact finger seat mounted on the protective housing 1 and ensuring reliable contact.

[0044] like Figure 7 and Figure 8 As shown, elastic pressure plates 2235 are provided on the outside of the first clamping plate 2231 and the second clamping plate 2232. By installing the elastic pressure plates 2235 on the outside of the first clamping plate 2231 and the second clamping plate 2232, the contact pressure can be increased and maintained stable. In the closed state, the elastic pressure plates 2235 elastically deform, continuously providing additional pressing force to the clamping surface, compensating for possible wear or vibration, significantly improving the reliability and long-term stability of the clamping jaws, and preventing heat generation due to poor contact.

[0045] Specifically, adjustable spacers 2234 mitigate manufacturing errors, while elastic pressure plates 2235 ensure contact reliability. A unique double-layered, large- and small-disc insulation spacer design significantly improves interphase insulation performance. This modular design offers a compact structure, high reliability, and easy maintenance, effectively overcoming the shortcomings of traditional spring-loaded blade mechanisms.

[0046] like Figure 1 and Figure 2 As shown, a limit plate 5 and a reinforcement plate 6 are provided inside the protective shell 1; the protective shell 1 is the outer shell of the entire isolation mechanism, provides mechanical protection and environmental protection, and serves as the installation basis for other components. It is installed inside the protective shell 1 through the limit plate 5 to limit the rotation angle of the rotating shaft 21 and the clamping member 22, ensure that the opening and closing positions are accurate, and prevent damage to components due to over-travel. It is installed inside the protective shell 1 through the reinforcement plate 6 to enhance the overall mechanical strength and rigidity of the protective shell 1, especially when subjected to opening and closing operating forces and short-circuit electric power, to ensure that the structure is stable and not deformed.

[0047] Specifically, there are three first contact finger assemblies 3, three second contact finger assemblies 4 and three clamping members 22, corresponding to phases A, B and C respectively, and each clamping member 22 is independently responsible for the on and off of one phase.

[0048] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0049] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An isolation mechanism of a high-voltage line control device, characterized in that: include: Protective shell (1); An opening and closing component (2), the opening and closing component (2) being arranged inside the protective shell (1); A first contact finger assembly (3), the first contact finger assembly (3) being installed on one side of the opening and closing assembly (2); A second contact finger assembly (4), the second contact finger assembly (4) being mounted on the other side of the opening and closing assembly (2); The opening and closing assembly (2) comprises a rotating shaft (21), and a plurality of clamping members (22) are mounted on the rotating shaft (21); The rotating shaft (21) is used to drive the clamping member (22) to rotate, thereby enabling the clamping member (22) to be in contact with or disconnected from the first contact finger assembly (3) and the second contact finger assembly (4).

2. The isolation mechanism of the high-voltage line control device according to claim 1, characterized in that: The clamping member (22) comprises a rotating opening and closing plate (221), the rotating opening and closing plate (221) being detachably connected to the rotating shaft (21) via a fixed plate (222), one end of the rotating opening and closing plate (221) being detachably connected to a first clamping claw (223), and the other end of the rotating opening and closing plate (221) being detachably connected to a second clamping claw (224).

3. The isolation mechanism of the high-voltage line control device according to claim 1, characterized in that: The first contact finger assembly (3) comprises a first contact finger seat (31), the upper end of the first contact finger seat (31) is connected to a first connecting rod (32), a first mounting sleeve (33) is sleeved on the first connecting rod (32), and the first mounting sleeve (33) is mounted on the protective shell (1).

4. The isolation mechanism of the high-voltage line control device according to claim 1, characterized in that: The second contact finger assembly (4) comprises a second contact finger seat (41), the upper end of the second contact finger seat (41) is connected to a second connecting rod (42), a second mounting sleeve (43) is sleeved on the second connecting rod (42), and the second mounting sleeve (43) is mounted on the protective shell (1).

5. The isolation mechanism of the high-voltage line control device according to claim 2, characterized in that: The first clamping jaw (223) includes a first clamping plate (2231) and a second clamping plate (2232), and the first clamping plate (2231) and the second clamping plate (2232) are connected to both sides of the end of the rotating opening and closing plate (221) through bolts (2233).

6. The isolation mechanism of the high-voltage line control device according to claim 2, characterized in that: The second clamping jaw (224) has the same structure as the first clamping jaw (223).

7. The isolation mechanism of the high-voltage line control device according to claim 5, characterized in that: Pads (2234) are provided on the inner sides of the first clamping plate (2231) and the second clamping plate (2232).

8. The isolation mechanism of the high-voltage line control device according to claim 5, characterized in that: Elastic pressure plates (2235) are provided on the outsides of the first clamping plate (2231) and the second clamping plate (2232).

9. The isolation mechanism of the high-voltage line control device according to claim 1, characterized in that: A limiting plate (5) and a reinforcement plate (6) are provided inside the protective shell (1).

10. The isolation mechanism of the high-voltage line control device according to claim 3, characterized in that: Three of each of the first contact finger assembly (3), the second contact finger assembly (4) and the clamping member (22) are provided.

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