Electrical interlocking device for circuit breaker

Abstract

The utility model provides an electrical interlocking device for a circuit breaker. An interlocking assembly comprises an interlocking shaft rotationally supported on the upper end face of a circuit breaker shell and a closing lock rod which is connected to the lower end of the interlocking shaft and corresponds to the upper position and the lower position of a closing bent plate in a closing assembly. The opening assembly comprises a pressing plate of which one end is fixed on the interlocking shaft, an opening lock rod which is guided and mounted in the circuit breaker shell through the upper end surface of the circuit breaker shell, and an opening beating plate which is positioned below the opening lock rod and is fixed on the opening half shaft, and the other end of the pressing plate is elastically connected with the upper end of the opening lock rod; a microswitch connected in series in a closing loop of the circuit breaker is arranged in the circuit breaker shell, and the microswitch is pressed by the opening beating plate to cut off the closing loop. According to the utility model, the electric interlocking structure is optimized, the transmission link of interlocking is reduced, the installation and debugging are simple and easy to operate, the reliability is strong, the operation is easier for an operator, the assembly efficiency is higher, the working intensity is reduced, the product performance is improved, the electric interlocking plays a role in electric locking besides mechanical locking, and the electric safety is high.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of circuit breaker, specifically relates to an electrical interlocking device for circuit breaker. BACKGROUND

[0002] High-voltage circuit breaker undertakes the heavy responsibility of overload, short-circuit protection and control of power equipment in high-voltage power transmission and distribution system. A reliable and complete circuit breaker interlocking device plays a great role in the electrical five-prevention maintenance, reconstruction and upgrading in the system, so each circuit breaker manufacturing enterprise lists the interlocking optimization of mechanism, assembly process and cooperation work meeting the requirements of electrical five-prevention as the top priority.

[0003] At present, the interlocking mainly takes mechanical interlocking function as the main, and other functions are secondary, so various complex interlocking redundant parts appear, leading to complex assembly, high consistency process requirement and low production efficiency, and the following problems exist: ① too many parts, complex assembly process, and individual process needs repeated debugging to assemble, so the whole process takes a long time; ② each part is independently assembled, transmission switching, and too many debugging points, so the uncertain factors of the whole product performance are increased; ③ too many parts also increase the procurement cost; ④ no electrical interlocking cooperation; therefore, it is necessary to improve in view of the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model solves the technical problem: provide a kind of electrical interlocking device for circuit breaker, by optimizing electrical interlocking structure, solve the problem of too many parts and many uncertain factors of product performance in the interlocking structure of current circuit breaker mechanism, reduce the transmission link of interlocking, installation and debugging are simple and easy to operate, reliability is strong, reduce the various problems in production and use process, so that operating personnel are easier to operate, more labor-saving, assembly efficiency is higher, reduce the working strength and work pressure of operating personnel, improve the performance of product, while electrical interlocking also plays the electrical locking outside mechanical locking, greatly improve the power safety, and lay a solid foundation for electrical five-prevention interlocking in power transmission and distribution system.

[0005] The utility model discloses a technical scheme: circuit breaker electrical interlocking device, including the interlocking assembly of installation on the circuit breaker, opening assembly and closing assembly, the interlocking assembly includes the interlocking shaft of rotation support on the circuit breaker casing upper end surface and the closing lock rod of the lower end of connection in the closing bent plate of interlocking shaft on closing assembly upper and lower position correspondence, the circuit breaker is by the interlocking shaft of counterclockwise rotation and drives closing lock rod to descend and inserts the rear end of closing bent plate when opening, realizes the anti -rotation locking of closing bent plate, the opening assembly includes the pressing plate of one end fixed on the interlocking shaft, the opening lock rod of the inside of the circuit breaker casing upper end surface guide installation to it, the opening beat of being located opening lock rod below and being fixed on the opening half shaft, the other end of pressing plate and opening lock rod upper end elasticity are connected, and when the interlocking shaft counterclockwise rotates, through the opening of descending pressing plate and opening lock rod and opening beat drive opening half shaft clockwise rotation and realize the circuit breaker opening of pushing opening beat, the inside of circuit breaker casing is equipped with the micro switch of being connected in the circuit breaker closing loop, and when opening beat drive opening half shaft clockwise rotation, realizes the closing loop cut-off by the micro switch of opening beat and pressing together.

[0006] Wherein, the opening lock rod is Z-shaped bending rod that upper and lower ends are vertical rods and middle part is inclined rod, the vertical rod of opening lock rod upper end is arranged through the through -hole of circuit breaker casing upper end surface and the long hole on the other end of pressing plate, the vertical rod of opening lock rod upper end is screw rod and is connected with the adjusting nut below pressing plate, the compression spring between circuit breaker casing upper end surface and adjusting nut is sleeved on opening lock rod, the guide plate is fixed on the inner wall of circuit breaker casing, and the vertical rod of opening lock rod lower end is arranged through the guide hole of guide plate, and when the interlocking shaft counterclockwise rotates, the opening half shaft is made to rotate clockwise by the opening beat of pressing plate and opening lock rod and descending.

[0007] Further, the guide plate below is equipped with the mounting plate of being fixed on the inner wall of circuit breaker casing, and the micro switch is installed on the mounting plate.

[0008] Further, the pressing plate is integral bending plate that middle part is inclined plate and both ends are horizontal plate, the horizontal plate of one end of pressing plate is fixed on the interlocking shaft, and the long hole for the upper end of opening lock rod is made on the horizontal plate of the other end of pressing plate.

[0009] Further, two connecting plates are fixed on the interlocking shaft, and the strip hole is made on the plate surface of the extending end of connecting plate, the upper end of closing lock rod is located between two connecting plates, and is connected as a whole by the short pin through the strip hole and the radial hole of closing lock rod upper end.

[0010] The utility model discloses a technical scheme: circuit breaker electrical interlocking device, including the interlocking assembly of installation on the circuit breaker, opening assembly and closing assembly, the interlocking assembly includes the interlocking shaft of rotation support on the circuit breaker casing upper end surface and the closing lock rod of the lower end of connection in the closing bent plate of interlocking shaft on closing assembly upper and lower position correspondence, the circuit breaker is by the interlocking shaft of counterclockwise rotation and drives closing lock rod to descend and inserts the rear end of closing bent plate when opening, realizes the anti -rotation locking of closing bent plate, the opening assembly includes the pressing plate of one end fixed on the interlocking shaft, the inside of the circuit breaker casing upper end surface guide installation to it, the opening of being located opening lock rod below and being fixed on the opening half shaft, the other end of pressing plate and opening lock rod upper end elasticity are connected, and when the interlocking shaft counterclockwise rotates, through the opening of descending pressing plate and opening lock rod and opening beat drive opening half shaft clockwise rotation and realize the circuit breaker opening of pushing opening beat, the inside of circuit breaker casing is equipped with the micro switch of being connected in the circuit breaker closing loop, and when opening beat drive opening half shaft clockwise rotation, realizes the closing loop cut-off by the micro switch of opening beat and pressing together.

[0011] 1. The technical scheme optimizes the electric interlocking structure, solves the problems of many parts and many uncertain factors of product performance in the current circuit breaker mechanism interlocking structure, reduces the interlocking transmission link, is simple to install and debug, is easy to use, has high reliability, and reduces various problems in the production and use process.

[0012] 2. In the tripping process, the counterclockwise rotating interlocking shaft is inserted into the closing bent plate through the downward closing lock rod, and the closing bent plate is prevented from rotating and locked, thereby greatly improving the power safety of the circuit breaker and improving the performance of the product.

[0013] 3. The tripping lock rod is elastically installed on the circuit breaker shell by a compression spring, the tripping lock rod is lowered by pressing the pressing plate to control the clockwise rotation of the tripping half shaft, and then the circuit breaker is tripped.

[0014] 4. The technical scheme makes it easier for the operator to operate, saves labor, has higher assembly efficiency, reduces the working strength and working pressure of the operator, and also plays the role of electrical locking in addition to mechanical locking, and lays a solid foundation for the electrical five-prevention interlocking in the power transmission and distribution system. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure front view of the utility model;

[0016] Figure 2 It is a structure left view of the utility model. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiments of the utility model will be clearly and completely described below. Figures 1-2 It is obvious that the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0018] It should be noted that in this paper, unless otherwise stated, it is understood that: the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the invention. In addition, the terms "first", "second", "third" and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0019] 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 limitation, 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.

[0020] Electrical interlocking devices for circuit breakers, such as Figures 1-2 As shown, the circuit breaker includes an interlocking assembly, a tripping assembly, and a closing assembly installed on it. The interlocking assembly includes a locking shaft 1 rotatably supported on the upper surface of the circuit breaker housing 14 and a closing locking rod 3 connected to the locking shaft 1, the lower end of which corresponds to the vertical position of the closing bend 13 in the closing assembly. When the circuit breaker trips, the counterclockwise rotating locking shaft 1 drives the closing locking rod 3 to move down and insert into the rear end of the closing bend 13, thereby achieving anti-rotation locking of the closing bend 13. The tripping assembly includes a pressure plate 5 fixed at one end to the locking shaft 1, a tripping locking rod 4 guided through the upper surface of the circuit breaker housing 14 and installed inside it, and a tripping plate 11 located below the tripping locking rod 4 and fixed to the tripping half-shaft 12. The other end of the pressure plate 5 is connected to the tripping half-shaft 12. The upper end of the locking rod 4 is elastically connected, and under the counterclockwise rotation of the interlocking shaft 1, the downward-moving pressure plate 5 and the tripping locking rod 4 push the tripping plate 11 to drive the tripping half shaft 12 to rotate clockwise, thereby realizing the tripping of the circuit breaker. The circuit breaker housing 14 is equipped with a micro switch 10 connected in series in the circuit breaker closing circuit. When the tripping plate 11 drives the tripping half shaft 12 to rotate clockwise, the tripping plate 11 presses the micro switch 10 to achieve the disconnection of the closing circuit. In the above structure, by optimizing the electrical interlocking structure, the problems of many parts and many uncertain factors in the current circuit breaker mechanism interlocking structure are solved. The transmission links of the interlocking are reduced, the installation and debugging are simple and easy to use, the reliability is strong, and various problems in the production and use process are reduced.

[0021] The split lock rod 4 is a Z-shaped bent rod with an inclined rod in the middle and vertical rods at the upper and lower ends, the vertical rod at the upper end of the split lock rod 4 is arranged through the through hole in the upper end face of the circuit breaker shell 14 and the long hole in the other end face of the pressing plate 5, the vertical rod at the upper end of the split lock rod 4 is a screw rod and is connected with the adjusting nut 6 below the pressing plate 5, the compression spring 7 arranged between the upper end face of the circuit breaker shell 14 and the adjusting nut 6 is sleeved on the split lock rod 4, the guide plate 8 is fixed on the inner side wall of the circuit breaker shell 14, and the vertical rod at the lower end of the split lock rod 4 is arranged through the guide hole in the guide plate 8, and when the counterclockwise rotating interlocking shaft 1 drives the split lock plate 11 to move downward through the pressing plate 5 and the split lock rod 4, the split half shaft 12 rotates clockwise; specifically, the mounting plate 9 fixed on the inner side wall of the circuit breaker shell 14 is arranged below the guide plate 8, and the micro switch 10 is mounted on the mounting plate 9.

[0022] The specific structure of the pressing plate 5 is as follows: the pressing plate 5 is an integral bent plate made of an inclined plate in the middle and horizontal plates at both ends, the horizontal plate at one end of the pressing plate 5 is fixed on the interlocking shaft 1, and the horizontal plate at the other end of the pressing plate 5 is provided with a long hole for the upper end of the split lock rod 4 to pass through, which has the same purpose and effect as the strip-shaped hole 16 arranged on the connecting plate 15, and provides the required amount of position adjustment when the split lock rod 4 moves downward.

[0023] In the structure, the split lock rod 4 elastically mounted on the circuit breaker shell 14 by the compression spring 7 moves downward to control the split half shaft 12 to rotate clockwise after the split lock rod 4 is driven to move downward by the pressing plate 5, so as to realize the circuit breaker split, the split lock rod 4 moves downward and resets, and the involved parts are few, the structure is simple, and the operation is reliable;

[0024] The connection structure of the interlocking shaft 1 and the closing lock rod 3 is as follows: the interlocking shaft 1 is fixed with two connecting plates 15, and the plate face of the extending end of the connecting plate 15 is provided with a strip-shaped hole 16, the upper end of the closing lock rod 3 is located between the two connecting plates 15 and is connected as a whole by a short pin passing through the strip-shaped hole 16 and the radial hole in the upper end of the closing lock rod 3, wherein the strip-shaped hole 16 is arranged to provide a position adjustment amount for the short pin, so as to ensure that the rotating connecting plate 15 can smoothly control the closing lock rod 3 to move up and down; specifically, the interlocking shaft 1 is rotatably supported on the upper end face of the circuit breaker shell 14 by the L-shaped support bent plate 2 provided with a through hole on the vertical plate, wherein the through hole on the support bent plate 2 is clearance-fitted with the interlocking shaft 1 to ensure the rotation of the interlocking shaft 1.

[0025] In the above structure, the counterclockwise rotating interlocking shaft 3 inserts the closing bent plate 13 and prevents it from rotating by moving downward during the split process, which greatly improves the electrical safety of the circuit breaker and the performance of the product;

[0026] When the circuit breaker needs to be powered off for maintenance, the circuit breaker needs to be in the split state, first, according to the Figure 1Rotate the interlocking shaft 1 counterclockwise at the position shown, pressing down the closing locking rod 3 and the pressure plate 5. The closing locking rod 3 inserts behind the closing bending plate 13 to prevent the closing bending plate 13 from rotating. At the same time, the opening locking rod 4 is pressed down by the pressure plate 5 and guided by the guide plate 8, causing the opening plate 11 to drive the opening half shaft 12 to rotate clockwise, thereby opening the circuit breaker. At the same time, during the rotation of the opening plate 11, the micro switch 10 on the mounting plate 9 is pressed, giving an opening signal and cutting off the closing circuit, which serves as a reminder and prevents misoperation. At this time, the entire interlocking operation process is completed, and the circuit breaker is in the open and de-energized state, and the next maintenance work can be carried out.

[0027] Conversely, during unlocking, rotating the interlocking shaft 1 clockwise causes the closing locking rod 3 and the opening locking rod 4 to lift and reset due to the rebound force of the compression spring 7. The closing locking rod 3 will be removed from the rear end of the closing bend plate 13, ready for the next closing operation. After the opening locking rod 4 resets, the opening half shaft 12 will drive the opening stop plate 11 to reset. The micro switch 10 will switch and connect the closing circuit, waiting for the next closing command. This completes the interlock release function, laying the foundation for safe power supply next time. It also ensures that personnel will not misoperate during maintenance.

[0028] This technical solution makes it easier and less strenuous for operators to operate, and increases assembly efficiency. It reduces the workload and pressure on operators, and the electrical interlocking also provides electrical locking in addition to mechanical locking, laying a solid foundation for the five-proof electrical interlocking in the power transmission and distribution system.

[0029] 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.

[0030] 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. An electrical interlock device for a circuit breaker, comprising an interlock assembly, a trip assembly and a close assembly mounted on the circuit breaker, characterized in that: The interlocking assembly comprises a locking shaft (1) rotatably supported on the upper end face of the circuit breaker shell (14) and a closing lock rod (3) connected to the lower end of the locking shaft (1) and corresponding to the upper and lower positions of the closing bent plate (13) in the closing assembly, when the circuit breaker is opened, the closing lock rod (3) is driven by the counterclockwise rotating locking shaft (1) to move downward and insert into the rear end of the closing bent plate (13), so as to realize the anti-rotation locking of the closing bent plate (13); the opening assembly comprises a pressing plate (5) fixed to one end of the locking shaft (1), an opening lock rod (4) installed in the inside of the upper end face of the circuit breaker shell (14) through the guide, an opening striking plate (11) located below the opening lock rod (4) and fixed to the opening half shaft (12), the other end of the pressing plate (5) is elastically connected with the upper end of the opening lock rod (4), and when the locking shaft (1) rotates counterclockwise, the opening striking plate (11) is pushed by the downward pressing plate (5) and the opening lock rod (4) to drive the opening half shaft (12) to rotate clockwise to realize the opening of the circuit breaker, and the inside of the circuit breaker shell (14) is provided with a micro switch (10) connected in series in the closing circuit of the circuit breaker, and when the opening striking plate (11) drives the opening half shaft (12) to rotate clockwise, the micro switch (10) is pressed by the opening striking plate (11) to realize the cutting off of the closing circuit.

2. The electrical interlock for circuit breakers of claim 1, wherein: The opening lock rod (4) is a Z-shaped bent rod with a slanted rod in the middle and vertical rods at the upper and lower ends, the vertical rod at the upper end of the opening lock rod (4) is arranged to pass through the through hole in the upper end face of the circuit breaker shell (14) and the long hole in the other end plate face of the pressing plate (5), the vertical rod at the upper end of the opening lock rod (4) is a screw rod and is connected with an adjusting nut (6) located below the pressing plate (5), a compression spring (7) arranged between the upper end face of the circuit breaker shell (14) and the adjusting nut (6) is sleeved on the opening lock rod (4), a guide plate (8) is fixed on the inner side wall of the circuit breaker shell (14), and the vertical rod at the lower end of the opening lock rod (4) passes through the guide hole in the guide plate (8), and when the locking shaft (1) rotates counterclockwise, the opening half shaft (12) is rotated clockwise by the downward pressing plate (5) and the opening lock rod (4) pressing the opening striking plate (11).

3. The electrical interlock for circuit breakers of claim 2, wherein: A mounting plate (9) fixed to the inner side wall of the circuit breaker shell (14) is arranged below the guide plate (8), and the micro switch (10) is mounted on the mounting plate (9).

4. The electrical interlock for circuit breakers of claim 1, wherein: The pressing plate (5) is an integral bent plate made of a middle inclined plate and two end horizontal plates, the horizontal plate at one end of the pressing plate (5) is fixed to the locking shaft (1), and the horizontal plate at the other end of the pressing plate (5) is provided with a long hole for the upper end of the opening lock rod (4) to pass through.

5. An electrical interlock device for a circuit breaker according to any one of claims 1-4, characterized in that: Two connecting plates (15) are fixed on the locking shaft (1), and strip holes (16) are arranged on the plate faces of the extending ends of the connecting plates (15), the upper end of the closing lock rod (3) is located between the two connecting plates (15), and the closing lock rod (3) is connected as a whole by passing through the strip holes (16) and the radial holes in the upper end of the closing lock rod (3).

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