CN210113642U

CN210113642U - Electrical switch with arc extinguishing structure

Info

Publication number: CN210113642U
Application number: CN201921394323.8U
Authority: CN
Inventors: 黄小凡
Original assignee: Southwest Jiaotong University
Current assignee: Southwest Jiaotong University
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-02-25
Anticipated expiration: 2029-08-26

Abstract

The utility model discloses an electrical switch with arc extinguishing structure, including the casing, the inside sliding connection of casing has the mounting box, and the inside fixed mounting of mounting box has a plurality of arc extinguishing grid tray, and leaves the arc extinguishing interval between every two adjacent arc extinguishing grid tray, and the below of arc extinguishing grid tray is equipped with static contact and moving contact, and the below of static contact and moving contact is equipped with the magnetic blow iron core, spiral winding has the magnetic blow coil on the magnetic blow iron core, the utility model discloses an arc extinguishing grid tray is mobile to reduce electric arc at the detention time of grid tray somewhere, reduced the emergence probability that punctures the grid tray, and electric arc can be along with arc extinguishing grid tray rebound, make electric arc length elongated, thereby reach and improve arc voltage increase current-limiting capacity, reduce the purpose of electric arc energy, thereby realize the effect of quick arc extinguishing.

Description

Electrical switch with arc extinguishing structure

Technical Field

The utility model relates to an electrical equipment technical field specifically is an electrical switch with arc extinguishing structure.

Background

The arc is a physical phenomenon which occurs when the electric switch is disconnected, and is characterized in that the arc is very strong in brightness and very high in temperature, the arc has a very large destructive effect on a contact, the generation of the arc has a very large influence on the safe operation of a power supply system, when the electric switch breaks short-circuit current, the time for the short-circuit current to pass through a circuit is prolonged by the arc on the contact of the electric switch, so that the time for the short-circuit current to damage the circuit equipment is prolonged, the circuit equipment is possibly damaged more, meanwhile, the contact of the switch can be burnt out by the high temperature of the arc, lead cables of the electric equipment are burnt out, the arc is extinguished by cutting the arc by adopting a grid plate in the current common scheme, the common position of the existing grid plate is fixed, when the arc is cut, the arc is blown into an arc extinguishing chamber only in a magnetic blowing mode, the arc extinguishing effect is, then cause grid plate to be punctured and burn out seriously easily, in order to introduce the explosion chamber with electric arc more fast, and realize the effect of quick arc extinguishing, and prevent that electric arc from detaining at a certain fixed position of arc extinguishing grid plate, therefore we have provided an electrical switch with arc extinguishing structure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electrical switch with arc extinguishing structure to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an electrical switch with arc extinguishing structure, includes the casing, the inside sliding connection of casing has the mounting box, the inside fixed mounting of mounting box has a plurality of arc extinguishing grid tray that are the inline, and leaves the arc extinguishing interval between every two adjacent arc extinguishing grid tray, the below of arc extinguishing grid tray is equipped with static contact and moving contact, the static contact is connected with the inlet wire end through the insulating block, just the moving contact is connected with the leading-out terminal, static contact and moving contact swing joint, moving contact sliding connection is in the inside of supporting shoe, be equipped with switching mechanism between moving contact and the leading-out terminal, the below of static contact and moving contact is equipped with the magnetic blow iron core, spiral winding has the magnetic blow coil on the magnetic blow iron core, the both ends of magnetic blow coil are connected with static contact, inlet wire end respectively.

Preferably, the switch mechanism comprises a shifting lever, the shifting lever is rotatably connected inside the shell through a rotating shaft, a waist-shaped groove is formed in the lower end of the shifting lever, a sliding column is slidably connected inside the waist-shaped groove, and the sliding column is fixedly connected to the side wall of the moving contact.

Preferably, the guide pillars are sleeved at four corners of the mounting box, the spring is sleeved on each guide pillar, the upper end of each guide pillar is fixedly connected to the inner side wall of the shell, a sliding plate is arranged above the mounting box, the left end of each sliding plate is sleeved on the corresponding shifting rod, a plurality of guide wheels are rotatably connected to the lower portion of each sliding plate, the guide wheels are slidably connected to the upper side face of the mounting box, and a plurality of bosses are arranged on the upper side face of the mounting box.

Preferably, the fixed contact and the movable contact are provided with arc striking angles.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model separates the moving contact from the static contact through the switch mechanism, when the moving contact is separated from the static contact, the electric arc generated between the moving contact and the static contact moves upwards along the arc striking angle and enters the arc extinguishing chamber under the action of the arc blowing force, then the arc extinguishing grid plate is caused to cut the generated electric arc, in the process, the slide plate slides relatively along with the rotation of the shift lever, the guide wheel slides on the upper side surface of the mounting box, at the moment, the guide wheel and the boss are mutually matched to cause the mounting box to slide upwards and downwards in the shell for a cycle, the arc extinguishing grid plate can move reversely after being close to the electric arc along with the sliding of the mounting box, after the arc extinguishing grid plate is close to the electric arc, the opposite electric arc can more quickly enter between the arc extinguishing grid plates, and because the arc extinguishing grid plate is moved, the detention time of the electric arc at a certain position of the grid plate is, the arc length is lengthened, so that the purposes of improving the arc voltage, increasing the current-limiting capacity and reducing the arc energy are achieved, and the effect of quickly extinguishing the arc is realized.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an exploded view of the housing of the present invention;

fig. 3 is an overall sectional view of the present invention;

fig. 4 is a schematic structural diagram I of the arc extinguishing grid plate, the static contact and the moving contact of the present invention;

fig. 5 is a schematic structural diagram II of the arc extinguishing grid plate, the static contact and the moving contact of the present invention;

fig. 6 is a schematic structural diagram III of the arc extinguishing grid, the static contact and the moving contact of the present invention;

fig. 7 is a schematic structural view of the mounting box, the switch mechanism and the sliding plate of the present invention;

FIG. 8 is an exploded view of the case, cover plate and arc chute plate of the present invention;

fig. 9 is a schematic structural view of the mounting box and the arc-extinguishing grid plate of the present invention.

In the figure: 1. the magnetic blow-out switch comprises a shell, 2, a mounting box, 201, a box body, 202, a cover plate, 3, an arc-extinguishing grid plate, 4, a static contact, 5, a moving contact, 6, a magnetic blow-out iron core, 7, a magnetic blow-out coil, 8, a switch mechanism, 801, a deflector rod, 802, a kidney-shaped groove, 803, a sliding column, 9, a supporting block, 10, a guide column, 11, a spring, 12, a sliding plate, 13, a guide wheel, 14, a boss, 15, an arc striking angle, 16 and an insulating block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: an electric switch with an arc extinguishing structure comprises a shell 1, wherein the shell 1 is made of an insulating plastic material, so that the phenomenon of electric shock is prevented when a user uses the electric switch, as shown in figure 2, one side surface of the shell 1 is separable from a main body, a device in the shell 1 is sealed through a bolt connection mode, a mounting box 2 is connected in the shell 1 in a sliding mode, a plurality of arc extinguishing grid plates 3 which are arranged in a straight line are fixedly mounted in the mounting box 2, the arc extinguishing grid plates 3 have the function of cutting off and extinguishing electric arcs generated in the device, the arc extinguishing grid plates 3 are of an insulating cuboid structure, an arc extinguishing interval is reserved between every two adjacent arc extinguishing grid plates 3, as shown in figure 9, the interval between the adjacent arc extinguishing grid plates 3 is gradually reduced from bottom to top, so that the bottoms of the arc extinguishing grid plates 3 are thinner, and the electric arcs can conveniently enter the inside of the interval, meanwhile, the air circulation is facilitated to play a role in cooling and arc extinguishing, reinforcing ribs are arranged on two sides of the arc extinguishing grid plate 3, the strength of the arc extinguishing grid plate 3 is guaranteed, a static contact 4 and a moving contact 5 are arranged below the arc extinguishing grid plate 3, the static contact 4 is connected with a wire inlet end through an insulating block 16, the moving contact 5 is connected with a wire outlet end, when the static contact 4 and the moving contact 5 are disconnected, the wire inlet end is still electrified, the wire outlet end does not have electricity, the wire inlet end and the wire outlet end are both connected with external leads, the device is connected in series on a closed loop of a power utilization circuit, the wire inlet end and the wire outlet end are both fixed on the side wall of the shell 1 through bolts, the wire inlet end and the wire outlet end cannot move in the shell 1, the moving contact 5 is connected with the wire outlet end through a telescopic spiral lead, the conduction between the moving contact 5 and, after the static contact 4 is connected with the moving contact 5, the inlet end and the outlet end are connected in series to keep current flowing, when the static contact 4 is separated from the moving contact 5, the inlet end and the outlet end are disconnected to promote current to be blocked, the moving contact 5 is slidably connected inside the supporting block 9, the supporting block 9 is fixed on the inner side wall of the shell 1, a switch mechanism 8 is arranged between the moving contact 5 and the outlet end, a magnetic blow iron core 6 is arranged below the static contact 4 and the moving contact 5, a magnetic blow coil 7 is spirally wound on the magnetic blow iron core 6, the magnetic blow iron core 6 is fixed in the center of the magnetic blow coil 7 to increase the arc blowing force of a magnetic field, two ends of the magnetic blow coil 7 are respectively connected with the static contact 4 and the inlet end, the surface of the magnetic blow coil 7 can be coated with an insulating shell, the magnetic blow coil 7, the static contact 4 and the inlet end are connected in series (due, therefore, the two can not be directly conducted through the insulating block 16, and only the static contact 4 can be connected with the incoming line end in series through the magnetic blow-out coil 7), a magnetic field is generated in the magnetic blow-out iron core 6 through current in the magnetic blow-out coil 7, so that the current of the magnetic blow-out coil 7 is equal to the arc current, after the magnetic blow-out iron core 6 generates a strong magnetic field, the arc is stressed in the magnetic field to move, and then the arc quickly leaves the contact and enters the interval of the arc-extinguishing grid plate 3 to force the arc to be extinguished.

Specifically, the switch mechanism 8 includes a shift lever 801, the shift lever 801 is rotatably connected to the inside of the housing 1 through a rotating shaft, the upper end of the shift lever 801 penetrates through the housing 1 and extends to the outside of the housing 1, the shift lever 801 is made of an insulating plastic material, a waist-shaped groove 802 is formed in the lower end of the shift lever 801, a sliding column 803 is slidably connected to the inside of the waist-shaped groove 802, the sliding column 803 is fixedly connected to a side wall of the movable contact 5, when the circuit is disconnected, the shift lever 801 is pushed rightwards to rotate the shift lever 801, the sliding column 803 slides inside the waist-shaped groove 802, the sliding column 803 is pushed leftwards to slide by the side wall of the waist-shaped groove 802, the sliding column 803 drives the movable contact 5 to slide leftwards to enable the movable contact 5 to be separated from the stationary contact 4 to achieve power off, and when the shift lever 801 is.

Specifically, guide pillars 10 are sleeved on four corners of the mounting box 2, a spring 11 is sleeved on each guide pillar 10, as shown in fig. 4, the spring 11 has a certain elastic force, the mounting box 2 is pushed upwards to keep the mounting box 2 at the uppermost position, the upper end of each guide pillar 10 is fixedly connected to the inner side wall of the housing 1, a sliding plate 12 is arranged above the mounting box 2, the left end of the sliding plate 12 is sleeved on a shifting rod 801, a plurality of guide wheels 13 are rotatably connected to the lower side of the sliding plate 12, the guide wheels 13 are slidably connected to the upper side surface of the mounting box 2, baffles perpendicular to the upper side surface of the mounting box 2 are arranged on two sides of the mounting box 2 to block the guide wheels 13, the guide wheels 13 are prevented from being separated from the mounting box 2, the upper side surface of the mounting box 2 is provided with a plurality of bosses 14, the number of the bosses 14 is the same as that of the guide wheels 13, when, the guide wheel positioned at the left side of the boss 14 rolls to the right side of the boss 14 along the boss 14, so that the arc-extinguishing grid plate 3 realizes a cycle of downward movement and upward movement;

further, the mounting box 2 is composed of a box body 201 and a cover plate 202, the box body 201 and the cover plate 202 are fixedly connected through bolts, the box body 201 is separated from the cover plate 202 when the arc-extinguishing grid plate 3 is mounted, then the arc-extinguishing grid plate 3 is assembled inside the box body 201 one by one according to the state shown in fig. 8, and the box body 201 and the cover plate 202 are fixed after the arc-extinguishing grid plate 3 is mounted, so that the mounting box has the effect of being convenient to assemble.

Specifically, the fixed contact 4 and the movable contact 5 are provided with the arc striking angle 15, and when the movable contact 5 is separated from the fixed contact 4, the arc generated between the movable contact 5 and the fixed contact 4 can move upwards along the arc striking angle 15, so that the arc can rapidly reach the arc extinguishing grid 3, and the arc extinguishing grid 3 can rapidly cut the arc.

The working principle is as follows: when the circuit is disconnected, the driving lever 801 is pushed rightwards to rotate the driving lever 801, so that the driving lever 801 causes the movable contact 5 to slide leftwards through the sliding column 803 to cause the movable contact 5 and the static contact 4 to be separated to realize power failure, an electric arc is generated between the movable contact 5 and the static contact 4, the electric arc moves upwards along the arc ignition angle 15 under the action of a magnetic field force, in the process, the driving lever 801 drives the sliding plate 12 to slide rightwards, then the guide wheel 13 slides on the upper side surface of the installation box 2, the guide wheel 13 slides to the top of the boss 14 in the state shown in fig. 4 (shown in fig. 5), at the moment, the installation box 2 drives the arc extinguishing grid 3 to move downwards, then the arc extinguishing grid 3 is driven to approach the electric arc (at the moment, the movable contact 5 and the static contact 4 are relatively close, the electric arc energy is relatively strong), at the moment, when the, and the sliding plate 12 will continue to slide rightwards, so the guide wheel 13 will cross the boss 14 (as shown in fig. 6), at this time, the mounting box 2 drives the arc-extinguishing grids 3 to move upwards through the elastic force of the spring 11, and then the electric arc between the arc-extinguishing grids 3 moves upwards along with the movement, so that the length of the electric arc is prolonged, the voltage of the electric arc is increased, the current-limiting capacity is increased, and the effect of rapid arc extinction is realized.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an electrical switch with arc extinguishing structure, includes casing (1), its characterized in that: the inner part of the shell (1) is connected with a mounting box (2) in a sliding manner, a plurality of arc-extinguishing grid plates (3) which are arranged in a straight line are fixedly mounted in the mounting box (2), an arc-extinguishing interval is reserved between every two adjacent arc-extinguishing grid plates (3), a static contact (4) and a moving contact (5) are arranged below each arc-extinguishing grid plate (3), the static contact (4) is connected with a wire inlet end through an insulating block (16), the moving contact (5) is connected with a wire outlet end, the static contact (4) is movably connected with the moving contact (5), the moving contact (5) is connected in a supporting block (9) in a sliding manner, a switch mechanism (8) is arranged between the moving contact (5) and the wire outlet end, a magnetic blow iron core (6) is arranged below the static contact (4) and the moving contact (5), and a magnetic blow coil (7) is spirally wound on the, and two ends of the magnetic blow coil (7) are respectively connected with the static contact (4) and the wire inlet end.

2. The electrical switch with an arc extinguishing structure according to claim 1, wherein: the switch mechanism (8) comprises a shifting lever (801), the shifting lever (801) is rotatably connected to the inside of the shell (1) through a rotating shaft, a waist-shaped groove (802) is formed in the lower end of the shifting lever (801), a sliding column (803) is connected to the inside of the waist-shaped groove (802) in a sliding mode, and the sliding column (803) is fixedly connected to the side wall of the movable contact (5).

3. An electrical switch with an arc quenching structure as claimed in claim 2, wherein: guide pillars (10) are sleeved at four corners of the mounting box (2), a spring (11) is sleeved on each guide pillar (10), the upper end of each guide pillar (10) is fixedly connected to the inner side wall of the shell (1), a sliding plate (12) is arranged above the mounting box (2), the left end of the sliding plate (12) is sleeved on the deflector rod (801), a plurality of guide wheels (13) are rotatably connected to the lower portion of the sliding plate (12), the guide wheels (13) are slidably connected to the upper side face of the mounting box (2), and a plurality of bosses (14) are arranged on the upper side face of the mounting box (2).

4. The electrical switch with an arc extinguishing structure according to claim 1, wherein: and arc striking angles (15) are arranged on the static contact (4) and the moving contact (5).