CN220914121U - High-conduction short-circuit-resistant structure - Google Patents

Abstract

The utility model discloses a high-conduction anti-short-circuit structure, which relates to the technical field of relays and comprises a spring seat, wherein a fixing frame is arranged right above the spring seat, the center of the upper surface of the spring seat is fixedly provided with the lower end of a supporting spring, and the upper end of the supporting spring is fixedly connected with a movable reed.

Description

High-conduction short-circuit-resistant structure

Technical Field

The utility model relates to the technical field of relays, in particular to a high-conduction short-circuit-resistant structure.

Background

Along with the continuous expansion of the scale of the power grid system, the short-circuit current level in the power grid system is increased year by year, and various power transmission and transformation equipment, particularly a large-scale power transformer and the like, meet the higher insulation requirement brought by the higher and higher short-circuit current level, otherwise, short-circuit current limiting measures are required, which becomes a serious problem for realizing safe and stable operation of the power grid system. The short-circuit current tolerance capability of main equipment such as a transformer in a power grid directly determines the safe operation level of the power grid, calculates the short-circuit resistance capability of key power equipment in the power grid according to the actual capacity of the current power grid, and carries out targeted treatment on equipment with insufficient short-circuit resistance capability risk according to the result, thereby having important significance for the safe production and operation of the power grid.

The relay is an important electric control device which is easy to generate short circuit in an electric power system, has an interaction relation between the control system and a controlled system, is generally applied to an automatic control circuit, and is actually an automatic switch which uses small current to control large current to operate, so that the relay plays roles of automatic adjustment, safety protection, circuit switching and the like in the circuit.

When the load end of the high-voltage direct-current relay passes through the current, electric repulsive force can be generated at the moving contact point and the fixed contact point, when abnormal working conditions occur, the electric repulsive force generated by the load current can exceed the contact force, the contacts can be separated, and arcing can occur between the moving contact point and the fixed contact point. With the development of technology, battery performance is continuously improved, short-circuit current is larger and larger, arcing is more and more serious, and then relay failure is caused.

Aiming at the problems, innovative design based on the original short-circuit resistant structure is urgently needed.

Disclosure of utility model

The technical scheme of the utility model aims at solving the technical problem that the prior art is too single, and provides a solution which is obviously different from the prior art, and particularly the utility model aims to provide a high-conduction short-circuit-resistant structure so as to solve the problem that when a load end of a high-voltage direct-current relay passes through current, electric repulsive force can occur at a dynamic contact point and a static contact point, when abnormal working conditions occur, the electric repulsive force generated by load current can exceed contact force, the contacts can be separated, and arcing can occur between the dynamic contact point and the static contact point. With the development of technology, battery performance is continuously improved, short-circuit current is larger and larger, arcing is more and more serious, and then the problem of relay failure is caused.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a high anti short circuit structure that switches on, includes the spring holder, be provided with the mount directly over the spring holder, and the center department of spring holder upper surface is fixed with the lower extreme of bearing spring to bearing spring's upper end fixedly connected with movable reed, movable reed's upper end is provided with the magnetic conduction piece, and installs the slip spacing subassembly between magnetic conduction piece and the mount, and the internally mounted of mount has the high mechanism that switches on of reverse thrust, the slip spacing subassembly includes spacing groove and spacing slider, and the both sides of going up the magnetic conduction piece all are fixed with spacing slider, the spacing groove has all been seted up to the both sides of mount, and two the outer end of spacing slider block respectively block slide set up in the inside of two spacing grooves, the high mechanism that switches on of reverse thrust includes reset spring, the upper surface of going up the magnetic conduction piece is seted up flutedly, reset spring's one end is fixed in the recess, and reset spring's the other end is all fixed in the lower surface of mount upper end.

Preferably, the two sides of the upper end of the spring seat are symmetrically fixed with positioning plates, the lower end of the fixing frame is provided with square through grooves which are spliced and matched with the positioning plates, the positioning plates are symmetrically arranged at the lower end of the fixing frame, and the center of the lower surface of the spring seat is fixedly connected with a push rod.

Preferably, the lower surface of the movable reed is provided with a lower magnetic conduction block, the lower magnetic conduction block is U-shaped, and two upper ends of the lower magnetic conduction block are attached to the lower surface of the upper magnetic conduction block.

Preferably, the limit sliding block is square, both sides and the upper surface of the limit sliding block are all connected with the inner wall of the limit groove in a fit manner, and a longitudinal space for the limit sliding block to move downwards is reserved between the limit sliding block and the limit groove.

Preferably, the lower surface of the movable reed is fixedly connected with the inner wall of the U-shaped groove of the lower magnetic conduction block, and the interval distance between the lower magnetic conduction block and the upper magnetic conduction block is zero point two millimeters when the movable reed is at the closed position.

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

On the basis of the original anti-short circuit structure, the utility model limits the movement of the upper magnetic conducting block through the grooving position of the fixing frame to reduce the gap between the upper magnetic conducting block and the lower magnetic conducting block so as to increase the electromagnetic attraction force, and the supporting spring upwards pushes the starting reed, the upper magnetic conducting block, the lower magnetic conducting block and the return spring in the initial state, so that the first section force of the supporting spring is weakened, the second suction is favorably reduced, and the pressure of the terminal supporting spring is increased; the upper magnetic conducting block moves downwards under the pushing of the return spring when the movable reed is at the closed position, stops at a smaller position away from the movable reed, has the advantages of large contact pressure, excellent conduction and breaking performance and extremely strong short circuit resistance compared with the traditional short circuit resistance structure, has the advantages of large contact pressure, simple structure, low cost, suitability for mass production and popularization and use, and plays a role in promoting the safe use of electric power.

Drawings

FIG. 1 is a perspective view of the present utility model;

FIG. 2 is a schematic side view of the present utility model;

FIG. 3 is a schematic elevational view of the present utility model;

fig. 4 is an enlarged schematic view of the structure of fig. 2 at 7 according to the present utility model.

In the figure: 1. a spring seat; 2. a positioning plate; 3. a fixing frame; 31. a limit groove; 4. a support spring; 7. a movable reed; 6. a magnetic conduction block is arranged on the upper part; 61. a limit sliding block; 5. a lower magnetic conductive block; 8. a return spring; 9. a push rod.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution: the utility model provides a high short circuit resistant structure who switches on, including spring holder 1, be provided with mount 3 directly over spring holder 1, and the center department of spring holder 1 upper surface is fixed with the lower extreme of bearing spring 4, and the upper end fixedly connected with movable reed 7 of bearing spring 4, the upper end of movable reed 7 is provided with magnetic conduction piece 6, and install the slip spacing subassembly between upper magnetic conduction piece 6 and the mount 3, and the internally mounted of mount 3 has the high mechanism that switches on of reverse thrust, the slip spacing subassembly includes spacing groove 31 and spacing slider 61, and the both sides of upper magnetic conduction piece 6 all are fixed with spacing slider 61, spacing groove 31 has all been seted up to the both sides of mount 3, and the outer end difference block slip of two spacing sliders 61 sets up in the inside of two spacing grooves 31, the high mechanism that switches on of reverse thrust includes reset spring 8, the upper surface of upper magnetic conduction piece 6 is seted up flutedly, the one end of reset spring 8 is fixed in the recess, and the other end of reset spring 8 is all fixed in the lower surface of mount 3 upper ends.

The locating plate 2 is fixed to the bilateral symmetry of spring holder 1 upper end, and the square logical groove that matches with locating plate 2 pegging graft is seted up to the lower extreme of mount 3 to locating plate 2 sets up at the lower extreme symmetry of mount 3, and the center department fixedly connected with push rod 9 of spring holder 1 lower surface has guaranteed that mount 3 can with the stable cooperation of pegging graft of locating plate 2, has guaranteed simultaneously that mount 3 can be stably fixed directly over spring holder 1.

The lower surface of movable reed 7 is provided with down magnetic conduction piece 5, and down magnetic conduction piece 5 is "U" font setting to two upper ends of lower magnetic conduction piece 5 all laminate with the lower surface of last magnetic conduction piece 6, and lower magnetic conduction piece 5 that "U" font set up is used for stably joining upper magnetic conduction piece 6 and lower magnetic conduction piece 5, provides stable bearing supporting role for movable reed 7.

The limit slider 61 is square, both sides and the upper surface of the limit slider 61 are all connected with the inner wall of the limit groove 31 in a fitting way, a longitudinal space for the limit slider 61 to move downwards is reserved between the limit slider 61 and the limit groove 31, and the limit slider 61 is positioned at the upper end of the limit groove 31 in an initial state, so that the upper magnetic conductive block 6 can only fall down for a short distance.

The lower surface of the movable reed 7 is fixedly connected with the inner wall of the U-shaped groove of the lower magnetic conduction block 5, and the interval distance between the lower magnetic conduction block 5 and the upper magnetic conduction block 6 is zero point two millimeters when the movable reed 7 is at the closed position.

Working principle:

This high short circuit resistant structure who switches on utilizes reset spring 8's promotion reset action to make upper magnetic conduction piece 6 have stable downward reset action, and the spacing slider 61 of upper magnetic conduction piece 6 both sides block slip in the spacing groove 31 of seting up in mount 3 both sides respectively simultaneously, therefore upper magnetic conduction piece 6 only can carry out vertical lift slip along the inner wall of mount 3.

Meanwhile, a vertical upward extrusion reset function is provided for the movable reed 7 by using the bearing spring 4, so that a proper distance between the lower magnetic conducting block 5 on the movable reed 7 and the upper magnetic conducting block 6 can be kept, and when the movable reed 7 is at a closed position, the distance between the upper magnetic conducting block 6 and the lower magnetic conducting block 5 is about two millimeters, and the distance is the optimal electromagnetic suction distance and has higher electromagnetic suction.

According to the utility model, the upper magnetic conduction block 6 is limited to move by clamping and sliding fit between the limiting grooves 31 on two sides of the fixing frame 3 and the limiting sliding blocks 61, so that the gap between the upper magnetic conduction block 6 and the lower magnetic conduction block 5 is reduced, the electromagnetic attraction force is further increased, the supporting spring 4 is used for jacking the movable reed 7, the upper magnetic conduction block 6, the lower magnetic conduction block 5 and the return spring 8 upwards in an initial state, at the moment, one section of force of the supporting spring 4 is weakened, the two-absorption reduction is facilitated, and the pressure of the tail end supporting spring 4 is increased; when the movable reed 7 is in the closed position, the upper magnetic conducting block 6 moves downwards under the pushing of the reset spring and stops at a smaller position away from the movable reed 7, the distance between the upper magnetic conducting block 6 and the lower magnetic conducting block 5 is about two millimeters at zero point, and the electromagnetic attraction force is large.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims (5)

1. The utility model provides a high short circuit resistant structure that switches on, includes spring holder (1), its characterized in that: the utility model is characterized in that a fixing frame (3) is arranged right above the spring seat (1), the lower end of a bearing spring (4) is fixed at the center of the upper surface of the spring seat (1), the upper end of the bearing spring (4) is fixedly connected with a movable spring piece (7), the upper end of the movable spring piece (7) is provided with an upper magnetic conduction block (6), a sliding limiting component is arranged between the upper magnetic conduction block (6) and the fixing frame (3), a reverse pushing high conducting mechanism is arranged in the fixing frame (3), the sliding limiting component comprises a limiting groove (31) and a limiting slide block (61), and go up both sides of magnetic conduction piece (6) and all be fixed with spacing slider (61), spacing groove (31) have all been seted up to the both sides of mount (3), and two the outer end of spacing slider (61) respectively block slide set up in the inside of two spacing grooves (31), thrust-reversing high conduction mechanism includes reset spring (8), the upper surface of going up magnetic conduction piece (6) is seted up flutedly, the one end of reset spring (8) is fixed in the recess, and the other end of reset spring (8) is all fixed in the lower surface of mount (3) upper end.

2. The high pass anti-shorting structure of claim 1, wherein: the square through groove matched with the positioning plate (2) in an inserting mode is formed in the lower end of the fixing frame (3), the positioning plate (2) is symmetrically arranged at the lower end of the fixing frame (3), and a push rod (9) is fixedly connected to the center of the lower surface of the spring seat (1).

3. The high pass anti-shorting structure of claim 1, wherein: the lower surface of movable reed (7) is provided with lower magnetic conduction piece (5), and lower magnetic conduction piece (5) are "U" font setting to two upper ends of lower magnetic conduction piece (5) all laminate with the lower surface of last magnetic conduction piece (6).

4. The high pass anti-shorting structure of claim 1, wherein: the limiting slide block (61) is square, both sides and the upper surface of the limiting slide block (61) are connected with the inner wall of the limiting groove (31) in a fitting mode, and a longitudinal space for the limiting slide block (61) to move downwards is reserved between the limiting slide block (61) and the limiting groove (31).

5. A high pass anti-shorting structure as recited in claim 3, wherein: the lower surface of the movable reed (7) is fixedly connected with the inner wall of the U-shaped groove of the lower magnetic conduction block (5), and the interval distance between the lower magnetic conduction block (5) and the upper magnetic conduction block (6) is zero point two millimeters when the movable reed (7) is at the closed position.