CN216388976U

CN216388976U - Novel current transformer for insulation monitoring based on direct-current power supply system

Info

Publication number: CN216388976U
Application number: CN202122940865.4U
Authority: CN
Inventors: 谭亮
Original assignee: Hunan Zhijiang Mangtangxi Water Conservancy And Hydropower Development Co ltd
Current assignee: Hunan Zhijiang Mangtangxi Water Conservancy And Hydropower Development Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-04-26
Anticipated expiration: 2031-11-26

Abstract

The utility model relates to a novel current transformer for insulation monitoring based on a direct-current power supply system, which comprises a transformer body and an installation bottom plate, wherein the bottom of the transformer body is provided with a stand column, and the bottom of the stand column is provided with a containing cavity with an inverted T-shaped cross section; the middle part of the mounting bottom plate is provided with a rotating shaft, the rotating shaft is provided with a flange plate, and the rotating shaft is limited by a flange end cover and can be rotatably mounted in the accommodating cavity of the upright post; the transformer comprises a transformer body and is characterized by further comprising a positioning mechanism, wherein the positioning mechanism is arranged in the containing cavity and used for positioning the relative position of the transformer body and the mounting base plate. According to the utility model, the mutual inductor body and the mounting bottom plate are designed into a rotatable structure, and the relative position of the mutual inductor body and the mounting bottom plate is positioned through the positioning mechanism, so that the mounting flexibility of the current mutual inductor is greatly improved, and the mounting position requirement is also reduced.

Description

Novel current transformer for insulation monitoring based on direct-current power supply system

Technical Field

The utility model relates to the technical field of electric power engineering, in particular to a novel current transformer for insulation monitoring based on a direct-current power supply system.

Background

In a traditional secondary circuit of an electric power system, a 200V/100V direct-current power supply system is generally adopted as a power supply circuit, so that the high reliability of the power supply of the secondary circuit is ensured, and the fault that the direct-current bus is short-circuited due to grounding of the other end caused by single-end insulation reduction is avoided; meanwhile, in order to avoid electric shock caused by that the other end of the single-end insulation is grounded and forms effective high direct-current voltage to the ground after the single-end insulation is reduced, the monitoring of the insulation of the positive bus and the negative bus of the direct-current power supply system to the ground becomes very important.

Insulation monitoring of a direct-current power supply system comprises insulation monitoring of a direct-current bus and insulation monitoring of each load branch, and a branch mutual inductor (current transformer) is generally used for insulation monitoring of each load branch. The existing current transformer is limited by the structure, has low flexibility after installation, can be installed only according to installation hole positions, and cannot be subjected to azimuth adjustment; and the wiring end is arranged at the bottom of the current transformer (the distance between the wiring end and the side of the transformer is only about 15 mm), the wiring space is small, and the wiring space of the wiring end is insufficient and the operation is difficult no matter the current transformer is installed horizontally or vertically.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems in the prior art. Therefore, the novel current transformer is good in flexibility, capable of adjusting the direction after installation and convenient to wire.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

the novel current transformer for insulation monitoring based on the direct-current power supply system comprises a transformer body and an installation bottom plate; the bottom of the mutual inductor body is provided with an upright post, and the bottom of the upright post is provided with a containing cavity with an inverted T-shaped cross section; the middle part of the mounting bottom plate is provided with a rotating shaft, the rotating shaft is provided with a flange plate, and the rotating shaft is limited by a flange end cover and can be rotatably mounted in the accommodating cavity of the upright post; the transformer comprises a transformer body and is characterized by further comprising a positioning mechanism, wherein the positioning mechanism is arranged in the containing cavity and used for positioning the relative position of the transformer body and the mounting base plate.

In a preferred embodiment of the novel current transformer for insulation monitoring based on a dc power supply system, the positioning mechanism includes a first toothed disc and a second toothed disc, the first toothed disc is disposed at the bottom of the flange, the second toothed disc is disposed at an end surface of the flange end cover opposite to the first toothed disc, and the first toothed disc and the second toothed disc can be meshed with each other.

In a preferred embodiment of the novel current transformer for insulation monitoring based on the dc power supply system, the novel current transformer further comprises a spring, the spring is disposed in the cavity, one end of the spring is connected to the cavity bottom of the cavity, and the other end of the spring abuts against the top of the rotating shaft.

In a preferred embodiment of the novel current transformer for insulation monitoring based on a dc power supply system, the spring is a diaphragm spring.

In a preferred embodiment of the novel current transformer for insulation monitoring based on a dc power supply system, the flange end cover is fixedly mounted at the bottom of the column by a plurality of screws distributed in a circle.

In a preferred embodiment of the novel current transformer for insulation monitoring based on a dc power supply system, a diameter of a circle formed by a plurality of screws is larger than a width of the mounting base plate.

In a preferred embodiment of the novel current transformer for insulation monitoring based on a direct-current power supply system, the terminal is arranged at the top of the transformer body.

Compared with the prior art, the novel current transformer for insulation monitoring based on the direct-current power supply system has the beneficial effects that:

the mutual inductor body and the mounting base plate are designed into a rotatable structure, and the relative position of the mutual inductor body and the mounting base plate is positioned through the positioning mechanism, so that the mounting flexibility of the current mutual inductor is greatly improved, and the mounting position requirement is also reduced;

and the wiring terminal is arranged at the top of the current transformer, so that the wiring convenience is improved, and meanwhile, whether wiring is correct or not is checked conveniently.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:

fig. 1 is a schematic structural diagram of a novel current transformer for insulation monitoring based on a dc power supply system provided by the utility model;

FIG. 2 is an enlarged partial view of the FIG. 1;

fig. 3 is a bottom view of the current transformer provided in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

This embodiment provides a based on novel current transformer is used in insulating monitoring of DC power supply system, as shown in figure 1 and figure 2, including mutual-inductor body 1 and mounting plate 2, mounting plate 2 locates the bottom of mutual-inductor body 1, as the installation basis of mutual-inductor body. In order to solve the flexibility problem after the mutual inductor is installed, in the embodiment, the column 101 is arranged at the bottom of the mutual inductor body 1, and the bottom of the column 101 is provided with a containing cavity 1010 with an inverted T-shaped cross section; correspondingly, the middle part of the mounting base plate 2 is provided with a rotating shaft 201, the rotating shaft 201 is provided with a flange 2012, the rotating shaft 201 is limited by a flange end cover 3 and is rotatably installed in the accommodating cavity 1010 of the upright post 101, as shown in fig. 2 and fig. 3, the flange end cover 3 is fixedly installed at the bottom of the upright post 101 through a plurality of screws distributed in a circular manner, in this embodiment, 3-4 screws are arranged for fixing, in order to facilitate the dismounting and mounting of the flange end cover, the diameter D of a circle formed by the plurality of screws in this embodiment is greater than the width of the mounting base plate L, and the mounting base plate does not interfere with the dismounting and mounting of the screws due to the design.

In order to realize the relative stability of the mutual inductor body and the mounting base plate, the present embodiment is further designed with a positioning mechanism, and the positioning mechanism is arranged in the accommodating cavity and used for positioning the relative position of the mutual inductor body and the mounting base plate.

Example two

On the basis of the first embodiment, the positioning mechanism is further designed in this embodiment, as shown in fig. 2, the positioning mechanism of this embodiment includes a first toothed disc 4 and a second toothed disc 5, the first toothed disc 4 is disposed at the bottom of the flange plate 2012, the second toothed disc 5 is disposed on the end surface of the flange end cover 3 relative to the first toothed disc 4, the first toothed disc 4 and the second toothed disc 5 can be meshed with each other, and the relative positions of the transformer body and the mounting base plate are fixed by the meshing of the first toothed disc and the second toothed disc. During specific adjustment, the first fluted disc and the second fluted disc can be separated by loosening the screw, and the screw is screwed after the position of the mutual inductor is adjusted; further, a spring can be sleeved on the screw.

EXAMPLE III

On the basis of the second embodiment, in order to realize that the mutual inductor is convenient for adjust the position of the mutual inductor relative to the mounting plate, the present embodiment is further designed with a spring 6, as shown in fig. 2, the spring 6 is disposed in the accommodating cavity 1010, one end of the spring 6 is connected to the bottom of the accommodating cavity 1010, and the other end of the spring abuts against the top of the rotating shaft 201.

Preferably, the spring 6 of the present embodiment may be a diaphragm spring.

Example four.

Based on any of the above embodiments, the terminal 102 of the transformer body is arranged at the top of the transformer body, so that the convenience of wiring is improved, and meanwhile, whether the wiring is correct or not is checked conveniently.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the present specification, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a based on DC power supply system insulation monitoring uses novel current transformer, includes mutual-inductor body and mounting plate, its characterized in that:

the bottom of the mutual inductor body is provided with an upright post, and the bottom of the upright post is provided with a containing cavity with an inverted T-shaped cross section;

the middle part of the mounting bottom plate is provided with a rotating shaft, the rotating shaft is provided with a flange plate, and the rotating shaft is limited by a flange end cover and can be rotatably mounted in the accommodating cavity of the upright post;

the transformer comprises a transformer body and is characterized by further comprising a positioning mechanism, wherein the positioning mechanism is arranged in the containing cavity and used for positioning the relative position of the transformer body and the mounting base plate.

2. The novel current transformer for insulation monitoring based on the direct-current power supply system according to claim 1, characterized in that: positioning mechanism includes first fluted disc and second fluted disc, first fluted disc is located the bottom of ring flange, the second fluted disc is relative first fluted disc is located the terminal surface of flange end cover, first fluted disc and second fluted disc can intermeshing.

3. The novel current transformer for insulation monitoring based on the direct-current power supply system according to claim 2, characterized in that: the spring is arranged in the containing cavity, one end of the spring is connected with the cavity bottom of the containing cavity, and the other end of the spring is abutted to the top of the rotating shaft.

4. The novel current transformer for insulation monitoring based on the direct-current power supply system according to claim 3, characterized in that: the spring is a diaphragm spring.

5. The novel current transformer for insulation monitoring based on the direct-current power supply system according to claim 2, characterized in that: the flange end cover is fixedly arranged at the bottom of the upright post through a plurality of screws distributed in a circular shape.

6. The novel current transformer for insulation monitoring based on the direct-current power supply system according to claim 5, characterized in that: the diameter of the circle formed by the plurality of screws is larger than the width of the mounting baseplate.

7. The novel current transformer for insulation monitoring based on the direct-current power supply system according to any one of claims 1 to 6, characterized in that: the wiring end is arranged at the top of the mutual inductor body.