Manual isolation knife mechanism for mutual inductor

Abstract

The utility model relates to a manual isolation knife mechanism for a mutual inductor. The manual isolation knife mechanism is characterized by comprising a mutual inductor shell, an isolation module and an isolation knife mechanism, the manual isolation knife mechanism provided by the utility model is simple to operate, and the electrified maintenance of the mutual inductor can be realized by operating the handle, so that the testing and maintenance of the mutual inductor are more convenient and safer. And the manual isolation knife mechanism is modularly designed according to different models of mutual inductors, so that the assembly and disassembly between the isolation knife mechanism and the isolation device are facilitated, the models of the isolation knife mechanism are reduced, and the material management is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to a manual disconnecting knife mechanism for a current transformer. Background Technology

[0002] In the field of high-voltage power electronics, testing capacitive voltage transformers requires removing the capacitive voltage divider before testing. Furthermore, repairing the internal components of capacitive voltage transformers also necessitates taking the product out of service. This is not only time-consuming and labor-intensive but also increases safety hazards. Therefore, current transformer products increasingly require manual operation for opening and closing the transformer. Manual isolating mechanisms have become a crucial requirement for transformer products, and their reliability directly impacts the operational quality of the transformer in the engineering field. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a manual isolation knife mechanism for current transformers, which can solve the problems of low modularity and inconvenient installation and removal of general manual isolation knife mechanisms.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a manual isolation knife mechanism for a current transformer, the innovation of which is: including a current transformer housing, an isolation module and an isolation knife mechanism;

[0005] The side of the current transformer housing has an isolation knife mechanism mounting hole, and the isolation knife mechanism is fixedly installed at the isolation knife mechanism mounting hole on the current transformer housing; one end of the isolation module is connected to the isolation knife mechanism, and the other end of the isolation module extends into the current transformer housing;

[0006] The isolation blade mechanism includes an isolation blade shaft assembly, a mechanical locking assembly, and an electrical locking assembly. The isolation blade shaft assembly includes a frame, an isolation blade shaft, a handle, a limiting sleeve, a bevel gear set, and an auxiliary switch. The frame is a bent sheet metal structure, and the frame has vertically arranged mounting holes for the isolation blade shaft. The isolation blade shaft is mounted on the frame vertically via a slewing bearing. The handle is horizontally positioned, and the limiting sleeve is located below one end of the handle. The limiting sleeve is connected to one end of the isolation blade shaft via a spline. The side of the limiting sleeve has a limiting hole that mates with the mechanical locking assembly. The other end of the isolation blade shaft is installed on the isolation module via a plug-in method. The bevel gear set includes a first bevel gear and a second bevel gear, and the first bevel gear is mounted on the isolation blade shaft. The auxiliary switch is mounted on the frame, and a transmission indicator rod is horizontally inserted through the auxiliary switch. One end of the transmission indicator rod has an indicator ball, and the other end of the transmission indicator rod is equipped with a second bevel gear, which meshes with the first bevel gear.

[0007] The mechanical locking assembly includes a base, a positioning shaft, a handle, and screws. The base is mounted on the frame and located on one side of the limiting sleeve. The base has a through hole along its axial direction to accommodate the positioning shaft. The positioning shaft passes through the base along the through hole, and one end of the positioning shaft extends out of the base and is connected to the handle by a pin. The other end of the positioning shaft extends out of the base and is locked to the limiting sleeve by a screw. Alternatively, the screw can be loosened to drive the handle and disengage the end of the positioning shaft from the limiting sleeve. A locking hole for cooperation with the electronic locking assembly is provided on one side of the handle.

[0008] The electronic locking assembly includes an electromagnetic lock, which is mounted on the frame and located below the handle. The electromagnetic lock is equipped with an electromagnetic pin that engages with a locking hole on the handle.

[0009] Furthermore, a spring is nested on the positioning shaft, with both ends of the spring abutting against the inner wall of the base and the positioning shaft, respectively.

[0010] The advantages of this utility model are:

[0011] 1) The manual isolating knife mechanism provided in this utility model is simple to operate. The operating handle can be used to perform live maintenance on the current transformer, making the testing and maintenance of the current transformer more convenient and safer. Furthermore, the modular design of the manual isolating knife mechanism for different models of current transformers facilitates the assembly and disassembly of the isolating knife mechanism and the isolation device, reduces the number of isolation knife mechanism models, and facilitates material management. Attached Figure Description

[0012] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0013] Figure 1 This is a schematic diagram of a manual isolation knife mechanism for a current transformer according to the present invention.

[0014] Figure 2 This is a cross-sectional schematic diagram of a manual isolation knife mechanism for a current transformer according to the present invention.

[0015] Figure 3 This is a diagram showing the working state of the electronic lock of a manual isolation knife mechanism for a current transformer according to this utility model. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0018] like Figure 1 Only Figure 3 The manual isolation knife mechanism for a current transformer shown includes a current transformer housing 1, an isolation module 2, and an isolation knife mechanism 3.

[0019] The side of the current transformer housing 1 has an isolation knife mechanism mounting hole, and the isolation knife mechanism 3 is fixedly installed at the isolation knife mechanism mounting hole on the current transformer housing; one end of the isolation module 2 is connected to the isolation knife mechanism 3, and the other end of the isolation module 2 extends into the current transformer housing 1.

[0020] The isolating blade mechanism 3 includes an isolating blade shaft assembly 4, a mechanical locking assembly 5, and an electrical locking assembly 6. The isolating blade shaft assembly 4 includes a frame 41, an isolating blade shaft 42, a handle 43, a limiting sleeve 44, a bevel gear set 45, and an auxiliary switch 46. The frame 41 is a bent sheet metal structure, and the frame 41 has an isolating blade shaft mounting hole along the vertical direction. The isolating blade shaft 42 is mounted on the frame 41 along the vertical direction via a slewing bearing. The handle 43 is horizontally positioned, and the limiting sleeve 44 is located below one end of the handle 43. The limiting sleeve 44 is integrally formed with the handle 43, and the limiting sleeve 44 is connected to the handle 43. The spline is connected to one end of the isolation cutter shaft 42. The side of the limiting sleeve 44 is provided with a limiting hole that cooperates with the mechanical locking component 5. The other end of the isolation cutter shaft 42 is installed on the isolation module 2 by plugging and unplugging. The bevel gear set 45 includes a first bevel gear and a second bevel gear, and the first bevel gear is installed on the isolation cutter shaft. The auxiliary switch 46 is installed on the frame 41, and a transmission indicator rod is horizontally installed inside the auxiliary switch 46. One end of the transmission indicator rod is provided with an indicator ball 47, and the other end of the transmission indicator rod is installed with a second bevel gear, which meshes with the first bevel gear.

[0021] The mechanical locking assembly 5 includes a base 51, a positioning shaft 52, a handle 53, and a screw 54. The base 51 is mounted on the frame 41 and located on one side of the limiting sleeve 44. The base 51 has a through hole along the axial direction to accommodate the positioning shaft 52. The positioning shaft 52 passes through the base 51 along the through hole, and one end of the positioning shaft 52 extends out of the end of the base 51 and is connected to the handle 53 by a pin. The other end of the positioning shaft 52 extends out of the end of the base 51 and is locked to the limiting sleeve 44 by the screw 54. Alternatively, the end of the positioning shaft 52 can be disengaged from the limiting sleeve 44 by loosening the screw 54 and driving the handle 53. A locking hole that cooperates with the electronic locking assembly 6 is provided on one side of the handle 53.

[0022] The electronic locking assembly 6 includes an electromagnetic lock, which is mounted on the frame and located below the handle. The electromagnetic lock is equipped with an electromagnetic pin, which engages with a locking hole on the handle.

[0023] A spring is nested on the positioning shaft 52, and the two ends of the spring abut against the inner wall of the base and the positioning shaft 52, respectively.

[0024] The working principle of this utility model is as follows: the provided manual isolating knife mechanism is simple to operate; the operating handle allows for live-line maintenance of the instrument transformer, making the testing and maintenance of the instrument transformer more convenient and safer. Furthermore, the modular design of the manual isolating knife mechanism for different models of instrument transformers facilitates the assembly and disassembly of the isolating knife mechanism and the isolation device, reduces the number of isolating knife mechanism models, and simplifies material management.

[0025] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A manual isolation knife mechanism for a current transformer, characterized in that: Includes the current transformer housing, isolation module, and isolation blade mechanism; The side of the current transformer housing has an isolation knife mechanism mounting hole, and the isolation knife mechanism is fixedly installed at the isolation knife mechanism mounting hole on the current transformer housing; one end of the isolation module is connected to the isolation knife mechanism, and the other end of the isolation module extends into the current transformer housing; The isolation blade mechanism includes an isolation blade shaft assembly, a mechanical locking assembly, and an electrical locking assembly. The isolation blade shaft assembly includes a frame, an isolation blade shaft, a handle, a limiting sleeve, a bevel gear set, and an auxiliary switch. The frame is a bent sheet metal structure, and the frame has vertically arranged mounting holes for the isolation blade shaft. The isolation blade shaft is mounted on the frame vertically via a slewing bearing. The handle is horizontally positioned, and the limiting sleeve is located below one end of the handle. The limiting sleeve is connected to one end of the isolation blade shaft via a spline. The side of the limiting sleeve has a limiting hole that mates with the mechanical locking assembly. The other end of the isolation blade shaft is installed on the isolation module via a plug-in method. The bevel gear set includes a first bevel gear and a second bevel gear, and the first bevel gear is mounted on the isolation blade shaft. The auxiliary switch is mounted on the frame, and a transmission indicator rod is horizontally inserted through the auxiliary switch. One end of the transmission indicator rod has an indicator ball, and the other end of the transmission indicator rod is equipped with a second bevel gear, which meshes with the first bevel gear. The mechanical locking assembly includes a base, a positioning shaft, a handle, and screws. The base is mounted on the frame and located on one side of the limiting sleeve. The base has a through hole along its axial direction to accommodate the positioning shaft. The positioning shaft passes through the base along the through hole, and one end of the positioning shaft extends out of the base and is connected to the handle by a pin. The other end of the positioning shaft extends out of the base and is locked to the limiting sleeve by a screw. Alternatively, the screw can be loosened to drive the handle and disengage the end of the positioning shaft from the limiting sleeve. A locking hole for cooperation with the electronic locking assembly is provided on one side of the handle. The electronic locking assembly includes an electromagnetic lock, which is mounted on the frame and located below the handle. The electromagnetic lock is equipped with an electromagnetic pin that engages with a locking hole on the handle.

2. The manual isolation knife mechanism for a current transformer according to claim 1, characterized in that: A spring is nested on the positioning shaft, with the two ends of the spring abutting against the inner wall of the base and the positioning shaft, respectively.

3. The manual isolation knife mechanism for a current transformer according to claim 1, characterized in that: The limiting bushing and the handle are integrally formed.

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