CN221080911U

CN221080911U - Leakage early warning device for protecting transformer substation equipment

Info

Publication number: CN221080911U
Application number: CN202322482703.XU
Authority: CN
Inventors: 武凯厚
Original assignee: Nanjing Houtai Electrical Technology Co ltd
Current assignee: Nanjing Houtai Electrical Technology Co ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-06-04
Anticipated expiration: 2033-09-13

Abstract

The utility model belongs to the technical field of transformer substations, in particular to an electric leakage early warning device for protecting transformer substation equipment, which comprises a box body provided with a groove, wherein an iron core is fixedly arranged in the groove of the box body, and a wire is spirally wound on the surface of the iron core; the box body is characterized in that a sliding block is connected in the groove of the box body in a sliding mode, extrusion blocks are fixedly arranged on two sides of the sliding block, and a power switch is arranged in the groove of the box body and located right above the extrusion blocks. According to the utility model, the electric equipment is connected with the electric leakage early warning device, when electric leakage occurs in the electric equipment, the current of the electromagnet is increased to enable the magnetic force of the electric equipment to be increased, the electromagnet pulls the sliding block through the attraction adsorption piece, the sliding block moves upwards to enable the extrusion block to extrude the power switch, the electric equipment is powered off, the electric leakage early warning device in the switch cabinet is prevented from tripping to enable other electric equipment of a bypass where the electric equipment is located to be powered off and closed, the damage to the equipment is avoided, and the service life of the electric equipment is shortened.

Description

Leakage early warning device for protecting transformer substation equipment

Technical Field

The utility model relates to the technical field of transformer substations, in particular to an electric leakage early warning device for protecting transformer substation equipment.

Background

The transformer substation is a place for converting voltage and current, receiving electric energy and distributing electric energy in the electric power system. The substation within the power plant is a step-up substation, which functions to step up the electrical energy generated by the generator and feed it into the high voltage grid. The leakage early warning device is usually installed in a switch cabinet in a transformer substation to perform leakage protection, acquires a leakage value of a line to be monitored through a leakage current transformer (a mutual inductance coil), analyzes and compares the leakage value, and automatically trips when the current exceeds a set value so as to protect electrical equipment in the transformer substation.

However, in the process of tripping the leakage early warning device, the technical scheme at least finds that the following technical problems exist:

The leakage early warning device monitors that an electrical device is automatically tripped when leakage occurs, so that all the electrical devices on the bypass where the electrical device is located are powered off, the electrical device is damaged when the electrical device is suddenly powered off, and the service life of the electrical device is shortened.

Disclosure of utility model

Based on the above, it is necessary to provide a leakage early-warning device for protecting substation equipment, aiming at the problem that the leakage early-warning device trips to bypass all electrical equipment to power off in the prior art.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The utility model relates to an electric leakage early warning device for protecting transformer substation equipment, which comprises a box body provided with a groove, wherein an iron core is fixedly arranged in the groove of the box body, and a wire is spirally wound on the surface of the iron core;

The box body is characterized in that a sliding block is connected in the groove of the box body in a sliding mode, extrusion blocks are fixedly arranged on two sides of the sliding block, and a power switch is arranged in the groove of the box body and located right above the extrusion blocks.

Further, the sliding block is positioned on an end extension line of the iron core.

Further, the end part of the sliding block is fixedly provided with an adsorption sheet, and the adsorption sheet adopts one of an iron sheet, a nickel sheet or a cobalt sheet.

Further, the groove of the box body is connected with the stop blocks in a sliding manner on two sides of the sliding block, and a limit spring is fixedly arranged between the stop blocks and the box body.

Further, the stop block adopts one of a ladder block structure and a cambered surface structure, and the shape of the extrusion block is the same as that of the stop block.

Further, a contact switch is arranged in the groove of the box body and right below the stop block, and the contact switch is electrically connected with a loudspeaker and an LED lamp.

Further, a reset spring is elastically connected between the sliding block and the box body, and the sliding block adopts one of a cylinder or a cuboid.

Furthermore, the groove of the box body is provided with symmetrically arranged partition plates between the iron core and the sliding block, and the distance between the two partition plates is shorter than the width of the sliding block.

Compared with the prior art, the utility model has the beneficial effects that:

1. According to the utility model, the lead is connected to the electrical equipment shell, current is transmitted to the lead when the electrical equipment shell leaks electricity, the current is circulated on the lead to enable the electromagnet to generate magnetic force, the magnetic force attracts the adsorption piece at the end part of the sliding block, the sliding block moves upwards to enable the extrusion block to extrude the power switch, the electrical equipment is shut down, the electric equipment is prevented from being completely shut down due to tripping of the leakage early warning device in the switch cabinet, other electrical equipment of a bypass where the electrical equipment is located is prevented from being damaged, and the service life of the electrical equipment is shortened.

2. In the process of moving up the sliding block, the limit spring is used for applying elasticity to the stop block to prevent the extrusion block from moving, when the leakage current of the electrical equipment is small, the attraction force of the electromagnet to the sliding block is smaller than the resistance of the stop block to the extrusion block and the elasticity of the spring, the extrusion blocks on two sides of the sliding block are blocked by the stop block and cannot move upwards, at the moment, the extrusion blocks extrude the contact switch below the stop block for a long time to perform early warning, and when the leakage amount is small, the alarm is timely given to prompt the inspection personnel to position the electrical equipment with leakage, and the inspection is timely performed.

Drawings

The disclosure of the present utility model is described with reference to the accompanying drawings. It should be understood that the drawings are for purposes of illustration only and are not intended to limit the scope of the present utility model in which like reference numerals are used to designate like parts.

Wherein:

fig. 1 is a schematic perspective view of an electric leakage early warning device for protecting substation equipment, which is introduced by the utility model;

FIG. 2 is a diagram showing a wire structure in a neutral state according to the present utility model;

FIG. 3 is a schematic diagram of the triggering state of the contact switch structure according to the present utility model;

FIG. 4 is a schematic diagram showing the state of a power switch trigger structure according to the present utility model;

fig. 5 is a schematic view of the structure of the case of the present utility model.

The reference numerals in the drawings indicate: 1. a case body; 2. an iron core; 3. a wire; 4. a slide block; 5. a return spring; 6. extruding a block; 7. a power switch; 8. a contact switch; 9. a stop block; 10. a limit spring; 11. a partition plate.

Detailed Description

It is to be understood that, according to the technical solution of the present utility model, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present utility model. Accordingly, the following detailed description and drawings are merely illustrative of the utility model and are not intended to be exhaustive or to limit the utility model to the precise form disclosed.

Example 1

In order to independently power off the electric equipment with electric leakage, the sudden power off of all the electric equipment on the bypass in the operation process is avoided, so that the electric equipment is damaged, and the service life of the electric equipment is shortened.

Referring to fig. 1, an embodiment of the utility model introduces an electric leakage early warning device for protecting substation equipment, which comprises a box body 1, wherein a groove is formed in the side part of the box body 1, an iron core 2 is fixedly installed in the groove, a wire 3 is wound on the surface of the iron core 2, the wire 3 is in a spiral shape, the end part of the wire 3 penetrates through the box body 1 and is connected to an electrical equipment shell, the iron core 2 and the wire 3 form an electromagnet, when electric leakage occurs in the electrical equipment shell, the current flowing in the wire 3 is increased, and the electromagnetic force formed by combining the iron core 2 and the wire 3 is increased.

Referring to fig. 2, a slider 4 is slidably connected in a groove of the box body 1, the slider 4 is one of a cylinder or a cuboid, an adsorption piece is fixedly mounted at an end portion of the slider 4, the adsorption piece is one of an iron piece, a nickel piece or a cobalt piece, the slider 4 is located on an extension line of an end portion of the iron core 2, an electromagnet formed by the iron core 2 and a wire 3 attracts the adsorption piece at the end portion of the slider 4, and when electric equipment leaks electricity, the magnetic force of the electromagnet is increased due to the increase of current flowing in the wire 3 connected with the electromagnet, so that the attraction force of the electromagnet to the adsorption piece and the slider 4 is larger.

The power switch 7 is arranged in the groove of the box body 1, the power switch 7 is electrically connected with the electrical equipment through the controller, the electrical equipment is powered off instead of being powered off by long-time pressing of the power switch 7, the power switch 7 is positioned above the extrusion block 6, the sliding block 4 is attracted by the electromagnet to move towards the power switch 7 and attract the power switch 7, the long-time piezoelectric switch 7 of the sliding block 4 enables the electrical equipment with electric leakage to be powered off, and the electrical equipment needs to be started manually.

Referring to fig. 4, a sliding block 4 is slidably connected in a groove of the box body 1, two sides of the sliding block 4 are fixedly provided with extrusion blocks 6, a stop block 9 is slidably connected in the groove of the box body 1, the stop block 9 adopts one of a ladder block structure and a cambered surface structure, and the shape of the extrusion blocks 6 is identical to that of the stop block 9. A limit spring 10 is elastically connected between the stop block 9 and the box body 1, when leakage current is large, the attraction force of the electromagnet to the slide block 4 is larger than the gravity of the slide block 4, the tension force of the reset spring 5 and the resistance of the stop block 9 to the extrusion block 6, and at the moment, the extrusion blocks 6 on two sides of the slide block 4 extrude the stop block 9 in the direction away from the slide block 4, so that the extrusion block 6 extrudes to the power switch 7.

Referring to fig. 2, a return spring 5 is elastically connected between the slider 4 and the box body 1, when the slider 4 is attracted by an electromagnet, the return spring 5 is elongated, the slider 4 drives a squeezing block 6 to move and long the power switch 7, so that the electrical equipment with electric leakage is powered off, no current is generated in the lead 3, the electromagnet loses magnetic force, and the return spring 5 resets the slider 4.

According to the leakage early warning device for protecting substation equipment, when electric equipment leaks, the current in the wire 3 electrically connected with the leakage early warning device is increased, the electromagnetic force formed by matching the iron core 2 and the wire 3 is increased to attract the sliding block 4, the sliding block 4 moves towards the electromagnet, the sliding block 4 drives the extrusion block 6 to move and presses the power switch 7 for a long time to close the leaked electric equipment, all the electric equipment on the bypass where the leaked electric equipment is located is suddenly powered off during operation when the leakage early warning device trips, and damage is caused to the equipment, so that the service life of the electric equipment is shortened.

Example two

In order to prompt the inspector to close and overhaul the electric leakage equipment when the electric equipment current is small, the continuous electric leakage is avoided, and the electric quantity loss is increased.

The embodiment of the utility model discloses a leakage early warning device for protecting substation equipment, referring to fig. 2, a contact switch 8 is arranged in a groove of a box body 1 and right below a stop block 9, and the contact switch 8 is electrically connected with a loudspeaker and an LED lamp.

Referring to fig. 3, when the electromagnet attracts the slider 4 to move upwards due to leakage of electrical equipment, the limit spring 10 applies resistance to the extrusion block 6 through the stop block 9 to prevent the slider 4 from moving, so that the leakage of electrical equipment increases the attraction of the electromagnet, and the position of the slider 4 gradually approaches the electromagnet. When the suction of the electromagnet to the sliding block 4 is smaller than the resistance of the stop block 9 to the extrusion block 6, the gravity of the sliding block 4 and the tension of the reset spring 5, the extrusion block 6 can only move to the bottom surface of the stop block 9, the extrusion block 6 is extruded to the contact switch 8, the contact switch 8 is pressed to enable the loudspeaker and the LED lamp to be electrified, so that the loudspeaker sounds and the LED lamp emits light to perform early warning, before the sliding block 4 and the power switch 7 are released, the extrusion block 6 is used for extruding the contact switch 8 to perform early warning, the position of the electric leakage equipment of a patrol inspector is prompted, the patrol inspector timely discovers electric leakage and manually closes the electric equipment, the alarm is performed when the electric leakage current is small, and the electric leakage phenomenon is prevented from becoming serious.

The groove of the box body 1 and the partition plates 11 which are symmetrically arranged are arranged between the iron core 2 and the sliding block 4, and the distance between the two partition plates 11 is shorter than the width of the sliding block 4. Limiting the moving distance of the sliding block 4 through the partition plate 11 prevents the sliding distance of the sliding block 4 from being too long, so that the reset spring 5 cannot recover deformation due to too large stretching deformation, and also prevents the power switch 7 from being damaged due to too large force of the pressing block 6 for pressing the power switch 7.

The embodiment of the utility model introduces a leakage early warning device for protecting transformer substation equipment, which has the advantages that the leakage current of the electrical equipment is small, when the suction force of an electromagnet to a sliding block 4 is smaller than the resistance of a stop block 9 to an extrusion block 6, the gravity of the sliding block 4 and the elasticity of a reset spring 5, so that the extrusion block 6 can only move to the bottom surface of the stop block 9, the extrusion block 6 is extruded to a contact switch 8, a loudspeaker is turned on for warning and an LED lamp is turned on for emitting light, before the electrical equipment is forced to be turned off, the position of the leakage equipment is prompted to a patrol personnel, the patrol personnel can timely find the leakage and manually turn off the electrical equipment, and the leakage equipment is timely turned off and overhauled.

In the description of the present utility model, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present utility model.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a transformer substation equipment protection is with electric leakage early warning device which characterized in that: the novel electric iron comprises a box body (1) with a groove, wherein an iron core (2) is fixedly arranged in the groove of the box body (1), and a wire (3) is spirally wound on the surface of the iron core (2);

the novel box is characterized in that a sliding block (4) is connected in the groove of the box body (1) in a sliding mode, two sides of the sliding block (4) are fixedly provided with extrusion blocks (6), and a power switch (7) is arranged in the groove of the box body (1) and located right above the extrusion blocks (6).

2. The leakage early warning device for protecting substation equipment according to claim 1, wherein: the sliding block (4) is positioned on an extension line of the end part of the iron core (2).

3. The leakage early warning device for protecting substation equipment according to claim 1, wherein: the end part of the sliding block (4) is fixedly provided with an adsorption sheet, and the adsorption sheet adopts one of an iron sheet, a nickel sheet or a cobalt sheet.

4. The leakage early warning device for protecting substation equipment according to claim 3, wherein: the box body (1) is provided with a groove and two sides of the sliding block (4) are slidably connected with stop blocks (9), and a limit spring (10) is fixedly arranged between the stop blocks (9) and the box body (1).

5. The leakage early warning device for protecting substation equipment according to claim 4, wherein: the stop block (9) adopts one of a ladder block structure and a cambered surface structure, and the shape of the extrusion block (6) is the same as that of the stop block (9).

6. The leakage early warning device for protecting substation equipment according to claim 5, wherein: the LED lamp is characterized in that a contact switch (8) is arranged in a groove of the box body (1) and located under the stop block (9), and the contact switch (8) is electrically connected with a loudspeaker and an LED lamp.

7. The leakage early warning device for protecting substation equipment according to claim 1, wherein: a reset spring (5) is elastically connected between the sliding block (4) and the box body (1), and the sliding block (4) adopts one of a cylinder or a cuboid.

8. The leakage early warning device for protecting substation equipment according to claim 7, wherein: the groove of the box body (1) is provided with symmetrically arranged partition plates (11) between the iron core (2) and the sliding blocks (4), and the distance between the two partition plates (11) is shorter than the width of the sliding blocks (4).