Circuit breaker operating mechanism with interlocking interface

Abstract

The utility model relates to a circuit breaker operating mechanism with a linkage interface, which is provided with a shell and a movable iron core positioned in the shell, and is also provided with the linkage interface, the linkage interface is fixedly arranged on the movable iron core, the outer end of the linkage interface is exposed from the shell, the linkage interface is composed of one or more linkage components, each linkage component is composed of an inner connecting piece and an outer connecting piece, the inner connecting piece is L-shaped, and the horizontal section of the inner connecting piece is fixedly connected to the top face of the movable iron core. The interlocking mechanism is compact in structure, can realize interlocking with a corresponding external mechanism, and is beneficial to reducing the overall size in a corresponding occasion.

Description

Technical Field

[0001] The utility model relates to a circuit breaker operating mechanism provided with a chain interface. Background Art

[0002] With the development of technology, 85% of the ring network cabinets tendered by the State Grid are environmentally friendly gas cabinets. Since the environmentally friendly gas cabinets have more compact requirements for circuit breakers, the existing operating mechanism is too large and cannot meet the corresponding use requirements. For example, Chinese patent document CN117239614A discloses a magnetically controlled environmentally friendly gas insulated ring network cabinet, including: a fixed seat, a switch room and a transmission room, the circuit breaker module of the switch room includes a magnetically controlled operating mechanism, a vacuum arc extinguishing chamber, an insulating pull rod assembly and a manual separation transmission assembly, the magnetically controlled operating mechanism includes a moving iron core, a static iron core and a coil, the moving iron core is located on the upper side of the static iron core, the vacuum arc extinguishing chamber is located on the lower side of the static iron core, the upper side of the insulating pull rod assembly is fixedly connected to the moving iron core, the bottom end of the insulating pull rod assembly is fixedly connected to the vacuum arc extinguishing chamber, and the top end passes through the moving iron core and is connected to the manual separation transmission assembly; the circuit breaker manual separation mechanism of the transmission room is connected to the manual separation transmission assembly through a transmission pull rod and a transmission crank arm. According to the technical solution of this embodiment, the moving iron core will approach or move away from the static iron core in the vertical direction under the action of the magnetic field, driving the insulating pull rod assembly to move in the vertical direction, realizing direct-acting drive. Chinese patent document CN210692472U discloses an electromagnetic control device, specifically relating to a permanent magnet mechanism used in high, medium and low voltage circuit breakers and contactors in power systems. It includes an upper magnetic conductive plate, a lower magnetic conductive plate, an upper guide rod, a lower guide rod, a moving iron core, and a trip spring. The upper part of the moving iron core is covered with a closing coil, and the lower part is covered with a trip coil. A permanent magnet is installed between the closing coil and the trip coil on the outer wall of the moving iron core; it also includes a support arm, and the upper guide rod fixedly connected to the moving iron core is two symmetrically arranged upper guide rods, and the upper ends of the two symmetrically arranged upper guide rods are respectively fixedly connected to the support arm, and a connecting portion for connecting an insulator is provided on the support arm, and a contact spring is provided between the insulator and the support arm, realizing linear drive. Chinese patent document CN103762118A discloses a single-phase magnetic operating mechanism vacuum circuit breaker and an intelligent vacuum circuit breaker system including the circuit breaker and a drive controller, wherein the magnetic operating mechanism of the circuit breaker includes a cylindrical magnetic conductive ring, an upper and lower magnetic yoke connected to the upper and lower ends of the magnetic conductive ring, a magnetic circuit assembly, a movable magnetic core, an excitation coil, a trip spring and a contact pressure spring, the excitation coil is arranged in the magnetic conductive ring, at least the upper part of the movable magnetic core is located in the columnar space defined by the inner hole of the excitation coil, an output rod is passed through the upper and lower parts of the movable magnetic core, the upper end of the output rod is connected to the moving contact, the trip spring and the contact pressure spring are coaxially sleeved on the output rod, the lower ends are both against the movable magnetic core, the upper end of the trip spring is against the upper magnetic yoke, and the upper end of the contact pressure spring is relatively fixed to the output rod. These prior arts have their own characteristics and are respectively adapted to various adaptive occasions. However, since other facilities are required to be interlocked with the circuit breaker in some occasions, a special mechanical / electrical interlocking mechanism needs to be equipped, thereby increasing the overall volume. In addition, since these circuit breakers all use linear drive, in certain usage scenarios, it is necessary to set up an external linear motion guide mechanism to achieve guidance or improve the accuracy of linear motion, further increasing the overall volume. Utility Model Content

[0003] The utility model aims to provide a circuit breaker operating mechanism with an interlocking interface. The mechanism is provided with an interlocking interface, which can realize interlocking with a corresponding external mechanism and is helpful to reduce the overall volume in corresponding occasions.

[0004] The technical solution of the utility model is: a circuit breaker operating mechanism with a locking interface is provided with a shell and a moving iron core located in the shell, and is also provided with a locking interface, wherein the locking interface is fixedly mounted on the moving iron core, and the outer end of the locking interface is exposed from the shell and is used to connect an external mechanism to be locked.

[0005] The interlocking interface is composed of one or more interlocking components, and the interlocking components are composed of an inner connecting part and an outer connecting part. The inner connecting part is L-shaped (or, adopts an L-shaped connecting plate), and its horizontal section is fixedly connected to (for example, fastened by screws) the top surface of the moving iron core (the end surface facing away from the static iron core, or, the non-attractive end surface), and its vertical section is located on one side of the moving iron core (the outer side of the circumferential surface). The outer connecting part is fixedly connected to the outer side of the vertical section of the corresponding inner connecting part, forming or including the outer end of the interlocking interface, which is used to connect the external mechanism to be interlocked.

[0006] The specific structure or shape of the external connecting member may depend on the connection method / connection structure of the external mechanism to be interlocked.

[0007] For example, the outer connecting member may be a cylinder extending in the radial direction (in the radial direction of the moving iron core / operating mechanism).

[0008] Furthermore, the number of the interlocking components may be two, which are symmetrically distributed left and right.

[0009] The shell can be composed of a protective outer cover and a mechanism limit plate and a static iron core bottom plate respectively fixedly connected to the upper and lower ends of the protective outer cover. A static iron core and a mechanism coil are also provided in the shell. The moving iron core is located above the static iron core and the mechanism coil. The mechanism coil is used for excitation (or magnetization).

[0010] The protective cover is usually cylindrical with upper and lower ends open. The mechanism limit plate and the static iron core top plate respectively cover the upper and lower ports of the protective cover and are fixedly connected to the protective cover to form a shell.

[0011] The inner cavity (inner wall) of the protective cover can usually be cylindrical, and other suitable shapes can also be adopted according to actual needs.

[0012] The outer side surfaces of the moving iron core and the static iron core are generally in a shape similar to the inner wall of the protective cover.

[0013] According to the shape, position and travel range of the interlocking interface (including the inner connector and the outer connector), corresponding notches or holes / through holes can be provided on the protective cover and / or the mechanism limit plate to avoid obstruction to the interlocking interface.

[0014] The mechanism limit plate and the static iron core bottom plate can be fastened and connected by multiple (for example, four) housing fixing bolts, and the protective outer cover is clamped between the mechanism limit plate and the static iron core bottom plate to form an integral structure.

[0015] The protective outer cover may be provided with vertical holes for passing the shell fixing bolts. If necessary, a support tube may be arranged in the vertical holes for passing the shell fixing bolts to improve the supporting capacity and strength of the protective outer cover. The support tube is coaxial with the corresponding vertical hole, and the outer wall is close to or close to the inner wall of the corresponding vertical hole. The shell fixing bolts pass through the tube hole of the support tube.

[0016] The protective cover may be provided with a plurality of vertically extending external expansion parts, the thickness of the external expansion parts increases, and a vertically extending convex structure is formed on the outer surface of the mechanism protective cover, and a vertical hole for passing the housing fixing bolt is opened in the corresponding external expansion part to avoid the inability to open the corresponding vertical hole due to insufficient thickness of the protective cover. This vertically extending convex structure can also play a corresponding reinforcement (reinforcement rib) role, which is conducive to improving / ensuring the overall strength of the housing.

[0017] The movable iron core limiting plate can be in the shape of a flat plate, or can be punched into a cover shape (three-dimensional structure).

[0018] The static iron core bottom plate is preferably provided with a mounting hole for fixed mounting on the circuit breaker frame, so that the overall weight of the mechanism and the opening and closing impulse can be borne by the static iron core bottom plate.

[0019] Preferably, a guide column is fixedly provided on the static iron core, and the guide column extends vertically upward (parallel to the axial direction of the moving iron core and the operating mechanism), with a certain distance between the guide column and the axis of the moving iron core (or the axis of the operating mechanism), and a guide hole corresponding to the guide column is provided on the moving iron core, and the guide column extends into the corresponding guide hole on the moving iron core and cooperates with the vertical guidance of the moving iron core (a cooperation method that limits the guide column to only vertical linear movement relative to the moving iron core).

[0020] The guide hole may generally be a vertical through hole.

[0021] Preferably, there are two guide posts, which are symmetrically distributed left and right.

[0022] Preferably, the lower part of the guide column is provided with a thread, and the static iron core is provided with a threaded hole threadedly connected to the guide column (the lower thread of the guide column), thereby realizing a fixed connection between the guide column and the static iron core. The upper part of the guide column can usually be cylindrical (or adopt a cylindrical head structure), and other suitable shapes can also be adopted according to actual needs.

[0023] Preferably, a guide sleeve (or guide bolt sleeve, or moving iron core protection sleeve, or guide column protection sleeve) is provided in the guide hole of the moving iron core, and the upper part of the guide column is inserted into the guide sleeve of the corresponding guide hole and slidingly cooperates with the inner wall (or hole wall) of the guide sleeve, thereby realizing vertical guiding cooperation between the guide column and the moving iron core and avoiding the generation of debris due to wear of the moving iron core.

[0024] Preferably, the guide sleeve is made of a wear-resistant non-metallic material.

[0025] The beneficial effects of the utility model are as follows: due to the provision of the interlocking interface, there is no need to provide an independent interlocking connection during use, which is not only convenient to use, but also compact in structure and occupies less space; since the guide column and the vertical guide hole are provided inside the operating mechanism, the guiding accuracy and stability are improved without substantially increasing the volume; due to the mounting holes fixedly installed on the circuit breaker frame, the overall weight of the mechanism and the opening and closing impulse can be borne by the static iron core bottom plate.

[0026] The utility model can be mainly used for medium and low voltage vacuum circuit breakers and other suitable occasions. In addition to being suitable for conventional circuit breaker operation, it is particularly suitable for the operation of circuit breakers in environmental protection switch cabinets. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the utility model;

[0028] Figure 2 It is a disassembled / exploded diagram of the utility model;

[0029] Figure 3 It is a cross-sectional view of the utility model. DETAILED DESCRIPTION

[0030] See also Figure 1-Figure 3This operating mechanism is a circuit breaker operating mechanism with an interlocking joint, and is mainly composed of a countersunk bolt 1, a guide bolt 2, a countersunk screw for a mechanism coil 3, a static iron core bottom plate 4, a static iron core 5, a mechanism coil 6, a protective cover 7, a trip spring 8, a guide bolt sleeve 9, a moving iron core 10, an interlocking interface 11, a mechanism limit plate 12 and a nut 13. Among them, the countersunk bolt 1 is used as a housing fixing bolt to fix the overall structure, the guide bolt 2 is used as a guide column, the countersunk screw for the mechanism coil 3 is used to fasten the mechanism coil (mechanism coil frame), the static iron core and the static iron core bottom plate together, the nut 13 is tightened on the top of the countersunk bolt to achieve the fastening of the countersunk bolt to the housing / mechanism, and the protective cover 7 is provided with four axially extending external expansion parts (convex structures) 14, and the external expansion parts are provided with through holes, and the countersunk bolts pass through the through holes corresponding to the external expansion parts and are hidden in the protective cover.

[0031] The static iron core assembly includes a static iron core, a static iron core base plate, and a mechanism coil. The countersunk screws for the mechanism coil (countersunk screws for the mechanism coil) pass through the static iron core base plate and the mechanism coil mounting holes on the static iron core, and then are tightened with the embedded nuts on the mechanism coil frame. There are two threaded holes on the static iron core for screwing in the guide bolts 2. These two screw holes (hole openings) are located on the inner engaging surface of the static iron core. The guide bolt 2 is a cylindrical head structure with a hexagonal groove at the top of the cylindrical head and a threaded structure at the bottom of the cylindrical head for fastening with the threaded holes of the static iron core. The outermost four holes on the static iron core base plate are used to fix the mechanism module to the circuit breaker housing.

[0032] The moving iron core assembly includes a moving iron core, two interlocking interfaces with L-shaped connectors (internal connectors), and two guide stud sleeves with one end being T-shaped (with an annular flange) and the other end having a pair of slots. There are also two through holes (guide holes) on the inner suction surface of the moving iron core, which are used to pass through the guide column protection sleeve and the guide column. The function of the guide column protection sleeve is to reduce the direct friction between the guide column and the moving core mechanism to produce impurities and debris, thereby affecting the smoothness of the suction surface and the mechanism cannot be closed normally. In order to prevent the guide sleeve from affecting the suction surface, the inner suction surface of the moving iron core (the end of the guide hole) has a symmetrical sinking groove, and the corresponding end of the guide sleeve is a T-shaped matching sinking groove to ensure that it does not slip out of the guide hole. There is a mounting hole on the outer bottom surface of the moving iron core for installing the L-shaped interface interlock. A cylinder is installed on the other end of the L-shaped interlock, which is used to provide a non-fixed connection interface, which plays the role of mechanical interlocking or realizing a three-phase synchronous interface.

[0033] The overall assembly method of this operating mechanism is: the mechanism protection cover is used as an overall support, the opening spring is placed in the inner hole of the moving and static iron cores, one end is against the step of the inner hole of the static iron core, and the other end is against the step of the inner hole of the moving iron core. During installation, the guide column of the static iron core passes through the guide sleeve on the moving iron core, and the end of the guide column sleeve extending out of the moving iron core is clamped with a retaining spring, and 4 countersunk bolts pass through the bottom plate of the static iron core, the mechanism protection cover, and the mechanism limit plate and then tightened with nuts. This becomes a complete circuit breaker mechanism module. At this time, the mechanism is in the opening state due to the action of the opening spring.

[0034] The height of the protective cover should be compatible with the opening torque and overtravel of the circuit breaker contacts.

[0035] According to the design strength requirements, the four through holes on the protective cover can be provided with support tubes or without support tubes.

[0036] The guide protection sleeve can be fixed by a retaining ring, and a retaining groove structure cooperating with the retaining ring is arranged at the top, or a thread can be arranged and fixed by a self-locking nut.

[0037] The operating mechanism can be fixed on the circuit breaker frame through the mounting holes on the bottom plate of the static iron core, and the bottom plate bears the overall weight of the mechanism and the opening and closing impact.

[0038] The utility model belongs to a semi-hard magnetic operating mechanism, and its basic working principle is: a positive closing pulse current is injected into the mechanism coil through a special control module, and after excitation, the moving iron core moves until it is attracted with the static iron core, completing the circuit breaker closing operation, and then the closing position is maintained by residual magnetism, and no energy maintenance is required. When opening is required, a reverse current is injected into the mechanism coil, the mechanism is demagnetized, and the circuit breaker opening operation is realized by relying on the action of the opening spring.

[0039] The terms up, down, left, right, top, bottom, horizontal, vertical, etc. in this specification are only used to express the relative position relationship of the relevant parts and do not constitute a limitation on the actual usage status.

[0040] Except for special instructions or situations where one preferred or optional technical means is a further limitation of another technical means, all preferred and optional technical means disclosed in the present utility model can be arbitrarily combined to form several different specific implementation methods.

Claims

1. A circuit breaker operating mechanism with an interlocking interface, comprising a housing and a moving iron core located in the housing, characterized in that A locking interface is also provided, which is fixedly installed on the moving iron core, and the outer end of the locking interface is exposed from the shell. The locking interface is composed of one or more locking components, and the locking component is composed of an inner connecting part and an outer connecting part. The inner connecting part is L-shaped, and its horizontal section is fixedly connected to the top surface of the moving iron core, and its vertical section is located on one side of the moving iron core. The outer connecting part is fixedly connected to the outer side of the vertical section of the corresponding inner connecting part.

2. The circuit breaker operating mechanism according to claim 1, characterized in that The number of the chain components is two, and they are symmetrically distributed on the left and right.

3. The circuit breaker operating mechanism according to claim 2, characterized in that The outer connecting member is a radially extending cylinder.

4. The circuit breaker operating mechanism according to claim 3, characterized in that The shell is composed of a protective outer cover and a mechanism limit plate and a static iron core bottom plate respectively fixedly connected to the upper and lower ends of the protective outer cover. A static iron core and a mechanism coil are also arranged in the shell, and the moving iron core is located above the static iron core and the mechanism coil.

5. The circuit breaker operating mechanism according to claim 4, characterized in that The movable iron core limiting plate is in a flat plate shape or is punched into a cover shape.

6. The circuit breaker operating mechanism according to claim 4, characterized in that The static iron core bottom plate is provided with a mounting hole for fixed mounting on the circuit breaker frame.

7. The circuit breaker operating mechanism according to claim 4, characterized in that A guide column is fixedly arranged on the static iron core, and the guide column extends vertically upward with a certain distance from the axis of the moving iron core. A guide hole corresponding to the guide column is arranged on the moving iron core, and the guide column extends into the corresponding guide hole on the moving iron core to cooperate with the vertical guidance of the moving iron core.

8. The circuit breaker operating mechanism according to claim 7, characterized in that There are two guide columns, which are symmetrically distributed on the left and right. The lower part of the guide column is provided with a thread. The static iron core is provided with a threaded hole which is threadedly connected to the guide column. The guide hole of the moving iron core is provided with a guide sleeve. The upper part of the guide column is inserted into the guide sleeve of the corresponding guide hole and slidably cooperates with the inner wall of the guide sleeve, thereby realizing vertical guiding cooperation between the guide column and the moving iron core.

9. The circuit breaker operating mechanism according to claim 8, characterized in that The guide sleeve is made of wear-resistant non-metal material.

Images