CN212570903U

CN212570903U - Low-voltage switchgear protection device against electric shock and automatic unhooking

Info

Publication number: CN212570903U
Application number: CN202021584479.5U
Authority: CN
Inventors: 张雪
Original assignee: Xin Tian Tangshan Electrical Engineering Co ltd
Current assignee: Xin Tian Tangshan Electrical Engineering Co ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2021-02-19
Anticipated expiration: 2030-08-04

Abstract

The utility model discloses an automatic unhook protection device of low-voltage switchgear protection against electric shock, including the last shell fragment that is located casing inner chamber upper wall right side, be located the crisscross lower shell fragment that sets up of shell fragment lower extreme, fix the iron core that pushes away the handle and be located lower shell fragment downside at shell fragment left end down, the right-hand member that pushes away the handle rotates with the casing through the round pin axle to be connected, and the wire that the shell fragment is connected down is the heliciform winding on the iron core, the upper end of going up the shell fragment and the upper end of iron core are fixed with the magnet piece respectively. The iron core is driven to move up and down to change the suction force of the lower elastic sheet. The rotating handle is rotated to drive the threaded rod to rotate, so that the sliding block is pulled to change the distance from the iron core to the lower elastic piece, the attraction effect of the lower elastic piece is changed, the larger the distance is, the lower the sensitivity is, the larger the current is, the lower elastic piece can be attracted from the upper elastic piece, the magnetic force of the magnet block on the upper side is overcome, the sensitivity is adjusted conveniently, and the rotating handle can be directly rotated.

Description

Low-voltage switchgear protection device against electric shock and automatic unhooking

Technical Field

The utility model relates to a cubical switchboard protection against electric shock sensitivity adjustment field specifically is a low-voltage switchgear protection against electric shock automatic unhook protection device.

Background

To low-voltage switchgear, in order to prevent to electrocute, a lot of protection mechanisms that have increased, for example set up the protector at the inlet wire end of switch board, in case electrocute, the electric current is too big, the electro-magnet actuation realizes the unhook of conducting strip to the outage, however, current this kind of sensitivity can't be adjusted, and is sometime along with ageing, electrocuted, the protector has not yet worked, consequently, how to adjust the unhook sensitivity of protector, is the problem that this field technical staff urgently needed to solve.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic unhook protection device of low-voltage switchgear protection against electric shock 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 automatic protection device that moults of low-voltage switchgear protection against electric shock, is including the last shell fragment that is located casing inner chamber upper wall right side, the lower shell fragment that is located the crisscross setting of shell fragment lower extreme, fixed shell fragment left end down push away the handle and be located the iron core of shell fragment downside, the right-hand member that pushes away the handle rotates with the casing through the round pin axle to be connected, and the wire that the shell fragment is connected down is the heliciform winding on the iron core, the upper end of going up the shell fragment and the upper end of iron core are fixed with the magnet.

The iron core is driven to move up and down to change the suction force of the lower elastic sheet.

Preferably, the adjusting mechanism is in a threaded manner.

Preferably, adjustment mechanism is including fixing the insulating guide cylinder of cup jointing the iron core in casing inner chamber bottom, and the cross-section of guide cylinder is squarely, install the insulating slider of the looks adaptation that can slide from top to bottom in the guide cylinder, and the slider is fixed at the lower extreme of iron core, still including driving the screw-thread mechanism that the slider reciprocated along the guide cylinder.

Preferably, the screw mechanism comprises a threaded rod connected to the lower end of the sliding block in a threaded manner, the threaded rod penetrates out of the shell downwards and is connected with a rotating handle, the threaded rod is rotatably connected with the shell, and a threaded hole corresponding to the threaded rod is formed in the lower end of the sliding block.

Preferably, the turning handle is a cake shape attached to the lower end of the shell, and anti-skid wales are arranged in the circumferential direction of the turning handle.

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

1. the upper elastic sheet is connected with the live wire inlet end of the power distribution cabinet, the tail end of a lead connected with the lower elastic sheet is connected with the power distribution cabinet, under the normal condition, the lower elastic sheet is adsorbed under the magnetic force of the magnet block on the upper side, so that the lower elastic sheet is attached to the upper elastic sheet to realize the electric conduction, once the electric shock occurs, the current of the lead on the iron core is increased, the generated magnetic force is increased, the lower elastic sheet is instantly attracted, the lower elastic sheet is made to overturn downwards, the magnetic force of the magnet block on the upper side is overcome, and the lower elastic sheet is attracted to the magnet;

2. the rotating handle is rotated to drive the threaded rod to rotate, so that the sliding block is pulled to change the distance from the iron core to the lower elastic piece, the attraction effect of the lower elastic piece is changed, the larger the distance is, the lower the sensitivity is, the larger the current is, the lower elastic piece can be attracted from the upper elastic piece, the magnetic force of the magnet block on the upper side is overcome, the sensitivity is adjusted conveniently, and the rotating handle can be directly rotated.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front view of the present invention;

fig. 3 is a top view of the guide cylinder and the iron core of the present invention.

In the figure: 1. a housing; 11. an upper spring plate; 12. a lower spring plate; 13. a push handle; 14. an iron core; 15. a magnet block; 2. a guide cylinder; 21. a slider; 22. a threaded rod; 23. and (5) screwing a handle.

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 to 3, the present invention provides a technical solution of an anti-electric shock automatic unhooking protection device for a low-voltage switch cabinet: the utility model provides an automatic protection device that unhooks of low-voltage switchgear protection against electric shock, including last shell fragment 11 that is located 1 inner chamber upper wall right side of casing, be located the crisscross lower shell fragment 12 that sets up of last shell fragment 11 lower extreme, fixed under the iron core 14 that pushes away handle 13 and be located shell fragment 12 downside of shell fragment 12 left end, the right-hand member that pushes away handle 13 rotates with casing 1 through the round pin axle to be connected, and the wire that shell fragment 12 is connected down is the heliciform winding on iron core 14, the upper end of going up shell fragment 11 and the upper end of iron core 14 are fixed with magnet piece 15 respectively. Go up the shell fragment 11 and connect the total inlet wire end of live wire, lower shell fragment 12 is connected the outlet terminal of live wire, and the outlet terminal is connected with the switch board, and in case the electric current is too big, the magnetic force that iron core 14 produced is greater than the magnet piece 15 of upside and to the magnetic force of lower shell fragment 12 of downside to make lower shell fragment 12 move the actuation downwards on magnet piece 15 of downside. The left end of the push handle 13 extends out of the housing 1, so that the push handle is convenient to break.

The adjusting mechanism drives the iron core 14 to move up and down so as to change the attraction force to the lower elastic sheet 12. The adjusting mechanism is in a thread mode. The adjustment is carried out in a threaded manner, so that the device is more precise and stable. The adjusting mechanism comprises an insulated guide cylinder 2 fixed at the bottom of an inner cavity of the shell 1 and sleeved with an iron core 14, the cross section of the guide cylinder 2 is square, an insulated sliding block 21 capable of sliding up and down in a matched mode is installed in the guide cylinder 2, the sliding block 21 is fixed at the lower end of the iron core 14, and the adjusting mechanism further comprises a thread mechanism driving the sliding block 21 to move up and down along the guide cylinder 2. The screw mechanism drives the slide block 21 to move up and down. The screw mechanism comprises a threaded rod 22 in threaded connection with the lower end of the sliding block 21, the threaded rod 22 penetrates out of the shell 1 downwards to be connected with a rotating handle 23, the threaded rod 22 is rotatably connected with the shell 1, and a threaded hole corresponding to the threaded rod 22 is formed in the lower end of the sliding block 21. The threaded rod 22 moves telescopically within the threaded bore. The swing handle 23 is a cake shape attached to the lower end of the shell 1, so that the occupied space is reduced, and the anti-skidding convex lines are arranged in the circumferential direction of the swing handle 23 to increase the friction force.

The working principle is as follows: go up the live wire inlet end connection of shell fragment 11 and switch board, and the terminal and switch board connection of wire of shell fragment 12 down, normal conditions, under the magnetic force of the magnet piece 15 of upside, adsorb shell fragment 12 down, make shell fragment 12 paste shell fragment 11 down, realize electrically conductive, in case take place to electrocute, the increase of wire current on the iron core 14, the magnetic force increase of production, shell fragment 12 under the actuation in the twinkling of an eye, make shell fragment 12 upset downwards down, overcome the magnetic force of the magnet piece 15 of upside, and on the actuation reaches the magnet piece 15 of downside, realize power-off protection. The rotating handle 23 is rotated to drive the threaded rod 22 to rotate, so that the sliding block 21 is pulled, the distance from the iron core 14 to the lower elastic sheet 12 is changed, the attraction effect on the lower elastic sheet 12 is changed, the larger the distance is, the lower the sensitivity is, and the larger the current is required to be, so that the lower elastic sheet 12 can be attracted from the upper elastic sheet 11 to overcome the magnetic force of the magnet block 15 on the upper side, the sensitivity can be adjusted conveniently, and the rotating handle 23 can be directly rotated.

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. An electric shock prevention automatic unhooking protection device of a low-voltage switch cabinet comprises an upper elastic sheet (11) positioned on the right side of the upper wall of an inner cavity of a shell (1), lower elastic sheets (12) positioned at the lower ends of the upper elastic sheets (11) in a staggered mode, a push handle (13) fixed at the left end of the lower elastic sheet (12) and an iron core (14) positioned on the lower side of the lower elastic sheet (12), wherein the right end of the push handle (13) is rotatably connected with the shell (1) through a pin shaft, a lead connected with the lower elastic sheet (12) is spirally wound on the iron core (14), and magnet blocks (15) are respectively fixed at the upper end of the upper elastic sheet (11) and the upper end of the;

the method is characterized in that: the adjusting mechanism is used for driving the iron core (14) to move up and down so as to change the suction force of the lower elastic sheet (12).

2. The low-voltage switch cabinet electric shock prevention automatic unhooking protection device according to claim 1, characterized in that: the adjusting mechanism is in a thread mode.

3. The low-voltage switch cabinet electric shock prevention automatic unhooking protection device according to claim 2, characterized in that: adjustment mechanism is including fixing insulating guide cylinder (2) of cup jointing iron core (14) in casing (1) inner chamber bottom, and the cross-section of guide cylinder (2) is squarely, install insulating slider (21) of gliding looks adaptation from top to bottom in guide cylinder (2), and slider (21) are fixed at the lower extreme of iron core (14), still including driving the screw-thread mechanism that slider (21) reciprocated along guide cylinder (2).

4. The low-voltage switch cabinet electric shock prevention automatic unhooking protection device according to claim 3, characterized in that: the screw mechanism comprises a threaded rod (22) which is in threaded connection with the lower end of the sliding block (21), the threaded rod (22) penetrates out of the shell (1) downwards to be connected with a rotating handle (23), the threaded rod (22) is rotatably connected with the shell (1), and a threaded hole corresponding to the threaded rod (22) is formed in the lower end of the sliding block (21).

5. The low-voltage switch cabinet electric shock prevention automatic unhooking protection device according to claim 4, characterized in that: the rotary handle (23) is a cake-shaped body attached to the lower end of the shell (1), and anti-skidding ribs are arranged in the circumferential direction of the rotary handle (23).