CN2209400Y

CN2209400Y - Electromagnetic motor protector

Info

Publication number: CN2209400Y
Application number: CN 94231332
Authority: CN
Inventors: 杨春树
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-25
Filing date: 1994-11-25
Publication date: 1995-10-04
Anticipated expiration: 2004-11-25

Abstract

The utility model relates to an emergency protective circuit device which can finish automatic switchover used for a motor when appearing detrimental change of deviating normal operating condition. Two pairs of upper and lower iron cores, electric induction coils L < 1 > and L < 2 > and normally-closed contacts C < 1 > and C < 2 > are arranged in an upper casing and on the base plate of a lower casing. The motor is made to always lie in the normal operating state by the utility model. When appearing deviating the normal conditions, the iron cores are attracted immediately to prompt the normally-closed contacts to quickly disconnect to make the motor cut-off an electric source to avoid the motor burning. The emergency protective circuit device has the advantages of safe and reliable in use, high sensibility, simple and compact structure, easy production and installation, convenient maintenance, low cost, etc.

Description

Electromagnetic motor protector

The utility model relates to and is used for motor can be finished automatic switchover when harmful variation of departing from normal running conditions occurring emergency protective circuit device, particularly a kind of electromagnetic motor protector.

The motor protector of using is of a great variety at present; when meeting the phase failure; overload; during reasons such as bearing of motor damages and motor rotor breaks down; electronic function is cut off the power supply automatically; avoid burning of motor; protector mostly adopts semiconductor element; it is low to exist action sensitivity; it is unreliable to use; make motor be in the unprotect operating condition; and high-tension circuit often has phase failure phenomenon to take place and plant equipment is prone to failure and other reasons and causes that motor current increases; the phenomenon of impelling motor to burn happens occasionally; and cause a series of economic losses such as stopping production, and shortcoming such as fragile maintenance is inconvenient, and wastage is bigger; for overcoming above-mentioned deficiency, the utility model has designed a kind of electromagnetic motor protector.

The purpose of this utility model provides a kind of safe and reliable, and is highly sensitive, makes motor be in work under the normal state, the electromagnetic motor protector that can in time avoid motor to burn all the time when the abnormal work condition occurring.

The utility model is achieved in that to reach on the lower house substrate in upper shell and is separately installed with on two pairs, lower core, upper core is moving iron core, lower core is a secured core, on the lower house substrate, have two rectangle secured core grooves, at lower house substrate centre and the vertical fixedly through hole that is drilled with of two rectangle secured core grooves, the place is drilled with the fixedly through hole identical with the lower house substrate in the middle of the two lower core downsides, two lower cores lay respectively in the lower house substrate two rectangle secured core grooves and run through fixing with fixed lever, on the upper shell medial surface, have two rectangle detents, has rectangle post bar respectively in the both sides of two rectangle detents, two upper core upsides lay respectively in the two rectangle detents that have on the upper shell medial surface, on two pairs, in the lower core respectively cover coiling drum frame being installed, two coiling drum framves are wound with inductance coil L respectively ₁, L ₂Two coiling drum frame downsides contact respectively with above the lower house substrate, two coiling drum frame upper sides contact with the inboard rectangle fixed leg of upper shell bar respectively, right side central at two upper cores has been riveted support respectively, two stands is separately installed with to being columniform pole under the rectangle, overlap respectively on the cylinder under two poles spring is installed, be positioned at two poles place at the lower house substrate and be drilled with the pole through hole respectively, the cylindrical end place inserts in respectively in the pole through hole under two poles, two springs upper end is gone up the rectangle lower end with pole respectively and is contacted, the lower end of spring contacts with the lower house real estate respectively, on rectangular left surface on two poles, be separately installed with normally-closed contact sheet down, be separately installed with the normally-closed contact sheet on the lower house substrate at the following normally-closed contact sheet place of installing on corresponding two poles, the contact of normally-closed contact sheet contacts and forms two normally-closed contact C on twice normally-closed contact sheets and two ₁, C ₂, have two connecting grooves in the left side of lower house substrate and be separately installed with terminal block and screw, have four connecting grooves on the right side of lower house substrate and be separately installed with terminal block and screw, inductance coil L ₁, L ₂Two ends respectively with lower house substrate left side two connecting grooves in terminal block and right side four connecting grooves wherein the terminal block in two connecting grooves be connected two normally-closed contact C ₁, C ₂Two ends, series connection back are connected with terminal block in two connecting grooves in addition of lower house substrate right side four connecting grooves respectively, terminal block in two access slots of lower house substrate left side is connected lower house substrate right side four connecting groove inductance coil L respectively with any two-phase end of three-phase ac contactor C ₁, L ₂Terminal block in two connecting grooves respectively with motor D three phase connections wherein the two-phase terminals be connected lower house substrate right side two normally-closed contact C ₁, C ₂Two connecting grooves in terminal block be connected with the following two ends of double start button QAN respectively, left end connects behind stop button TAN and the A.C. contactor pull-in winding CJ with three phase mains and wherein one is connected mutually under the double start button QAN, the following right-hand member of double start button QAN is connected with last right-hand member, and the last left end of double start button QAN connects behind the fuse with the two-phase in addition of three phase mains and wherein one is connected mutually.

The utility model makes motor be under the normal operating conditions all the time, when occurring departing from normal condition, iron core adhesive immediately impelled normally-closed contact to disconnect rapidly when motor current changed, motor is cut off the electricity supply at any time, the economic loss that can avoid motor to burn and cause has safe and reliable, highly sensitive, simple and compact for structure, be easy to make to install, easy to maintenance, advantage such as with low cost.

Concrete structure of the present utility model and embodiment are provided by the following drawings.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is an A-A cross-sectional view of the present utility model;

Fig. 3 is a circuit connection diagram of the present utility model.

To be described in further detail concrete structure of the present utility model and embodiment below in conjunction with accompanying drawing.

See shown in the accompanying drawing 1-3: in rectangle or square upper shell 6 and on rectangle or the square lower house substrate 1, be separately installed with two pairs of iron cores that are " day " font or are " mouth " font, two pairs of

upper cores

5,8, lower core 2,7,

upper core

5,8 are moving iron core, lower core 2,7 is secured core, on lower house substrate 1, have two rectangle secured core grooves, in lower house substrate 1 centre and the vertical fixedly through hole that is drilled with of two rectangle secured core grooves, two lower cores 2, the place is drilled with the fixedly through hole identical with lower house substrate 1 in the middle of 7 downsides, two lower cores 2,7 lay respectively in 1 liang of rectangle secured core of lower house substrate groove and run through fixing with fixed lever 15, on upper shell 6 medial surfaces, have two rectangle detents, has rectangle post bar 16 respectively in the both sides of two rectangle detents, two

upper cores

5,8 upsides lay respectively in the two rectangle detents that have on upper shell 6 medial surfaces, at two pairs of

upper cores

5,8, lower core 2, overlap respectively in 7 coiling drum frame 4 is installed, 9, two

coiling drum framves

4,9 are wound with inductance coil L respectively ₁3, L ₂17, two coiling drum framves 4,9 downsides contact respectively with above the lower house substrate 1, two

coiling drum framves

4,9 upper sides contact with upper shell 6 inboard rectangle fixed leg bars 16 respectively, at two

upper cores

5,8 right side central has been riveted support 10 respectively, two stands 10 is separately installed with to being columniform pole 11 under the rectangle, overlap respectively on 11 times cylinders of two poles spring 12 is installed, be positioned at two poles, 11 places at lower house substrate 1 and be drilled with the pole through hole respectively, 11 times cylindrical end places of two poles insert in respectively in the pole through hole, two springs, 12 upper ends contact with rectangle lower end on the pole 11 respectively, the lower end of spring 12 contacts respectively with above the lower house substrate 1, on rectangular left surface on two poles 11, be separately installed with normally-closed contact sheet 13 down, the contact that is separately installed with normally-closed contact sheet 14 on 14, twice normally-closed contact sheets 13 of normally-closed contact sheet and two on the lower house substrate 1 at following normally-closed contact sheet 13 places of installing on corresponding two poles 11 contacts and forms two normally-closed contact C ₁, C ₂, have two connecting grooves in the left side of lower house substrate 1 and be separately installed with terminal block and screw, have four connecting grooves on the right side of lower house substrate 1 and be separately installed with terminal block and screw, inductance coil L ₁3, L ₂17 two ends respectively with lower house substrate 1 left side two connecting grooves in terminal block and right side four connecting grooves wherein the terminal block in two connecting grooves be connected two normally-closed contact C ₁, C ₂Two ends, series connection back are connected with terminal block in two connecting grooves in addition of lower house substrate 1 right side four connecting grooves respectively, terminal block in two access slots of lower house substrate 1 left side is connected with any two-phase end of three-phase ac contactor C respectively, lower house substrate 1 right side four connecting groove inductance coil L ₁3, L ₂Terminal block in 17 two connecting grooves respectively with motor D three phase connections wherein the two-phase terminals be connected lower house substrate 1 right side two normally-closed contact C ₁, C ₂Two connecting grooves in terminal block be connected with the following two ends of double start button QAN respectively, left end connects behind stop button TAN and the A.C. contactor pull-in winding CJ with three phase mains and wherein one is connected mutually under the double start button QAN, the following right-hand member of double start button QAN is connected with last right-hand member, and the last left end of double start button QAN connects behind the fuse with the two-phase in addition of three phase mains and wherein one is connected mutually.

Claims

1, a kind of electromagnetic motor protector, it is by upper shell (6), lower house substrate (1), upper core (5), (8), lower core (2), (7), fixed lever (15), coiling drum frame (4), (9), inductance coil L ₁(3), L ₂(17), support (10), spring (12), following normally-closed contact sheet (13), last normally-closed contact sheet (14), terminal block, three-phase ac contactor C, double start button QAN, stop button TAN, A.C. contactor pull-in winding CJ forms, it is characterized in that: in upper shell (6) and on the lower house substrate (1), have two pairs of upper cores (5), (8), lower core (2), (7), on lower house substrate (1), have two rectangle secured core grooves, at the middle vertical fixedly through hole that has of lower house substrate (1) with two rectangle secured core grooves, two lower cores (2), (7) the downside place has the fixedly through hole identical with lower house substrate (1), two lower cores (2), (7) lay respectively in lower house substrate (1) the two rectangle secured core groove and run through fixing with fixed lever (15), on upper shell (6) medial surface, have two rectangle detents, has rectangle post bar (16) respectively in the both sides of two rectangle detents, two upper cores (5), (8) upside lays respectively in the two rectangle detents that have on upper shell (6) medial surface, at two pairs of upper cores (5), (8), lower core (2), (7) has coiling drum frame (4) in respectively, (9), two coiling drum framves (4), (9) has inductance coil L respectively ₁(3), L ₂(17), two coiling drum framves (4), (9) downside contacts respectively with above the lower house substrate (1), two coiling drum framves (4), (9) upper side contacts with upper shell (6) inboard rectangle fixed leg bar (16) respectively, in two upper cores (5), (8) has support (10) respectively, two stands (10) has respectively to be gone up to being columniform pole (11) under the rectangle, two poles (11) have spring (12) respectively on the cylinder down, be positioned at two poles (11) at lower house substrate (1) and locate to have the pole through hole respectively, two poles (11) insert in respectively in the pole through hole at the cylindrical end place down, two springs (12) upper end is gone up the rectangle lower end with pole (11) respectively and is contacted, the lower end of spring (12) contacts respectively with above the lower house substrate (1), upward has following normally-closed contact sheet (13) respectively on the rectangular side two poles (11), have last normally-closed contact sheet (14) respectively on the lower house substrate (1) that the following normally-closed contact sheet (13) on corresponding two poles (11) is located, the contact of normally-closed contact sheet (14) contacts and forms two normally-closed contact C on twice normally-closed contact sheets (13) and two ₁, C ₂, have two connecting grooves in the left side of lower house substrate (1) and have terminal block respectively, have four connecting grooves on the right side of lower house substrate (1) and have terminal block, inductance coil L respectively ₁(3), L ₂(17) two ends respectively with lower house substrate (1) left side two connecting grooves in terminal block and right side four connecting grooves wherein the terminal block in two connecting grooves be connected two normally-closed contact C ₁, C ₂Two ends, series connection back are connected with terminal block in two connecting grooves in addition of lower house substrate (1) right side four connecting grooves respectively, terminal block in two access slots of lower house substrate (1) left side is connected lower house substrate (1) right side four connecting groove inductance coil L respectively with the two-phase end of three-phase ac contactor C ₁(3), L ₂(17) terminal block in two connecting grooves respectively with motor D three phase connections wherein the two-phase terminals be connected lower house substrate (1) right side two normally-closed contact C ₁, C ₂Two connecting grooves in terminal block be connected with the following two ends of double start button QAN respectively, left end connects behind stop button TAN and the A.C. contactor pull-in winding CJ with three phase mains and wherein one is connected mutually under the double start button QAN, the following right-hand member of double start button QAN is connected with last right-hand member, and the two-phase in addition of the last left end of double start button QAN and three phase mains wherein one is connected mutually.