CN201294471Y

CN201294471Y - Delay circuit for leather belt motor startup

Info

Publication number: CN201294471Y
Application number: CNU2008202187239U
Authority: CN
Inventors: 张荣军; 闻晓丹
Original assignee: Angang Steel Co Ltd
Current assignee: Angang Steel Co Ltd
Priority date: 2008-10-28
Filing date: 2008-10-28
Publication date: 2009-08-19
Anticipated expiration: 2018-10-28

Abstract

The utility model relates to a start delaying circuit of a belt motor, which is characterized in that time relays KT1 and KT2 are respectively connected in a natural rotating circuit and a reverse rotating circuit in parallel. The start delaying circuit can effectively prevent the problem that the motor is directly forced in the reverse direction without reducing the speed, which is caused by error operation or habitual operation, the accidents of twisting off a motor shaft are reduced, and the service life of the motor is improved. The phenomenon that a belt runs to one side is controlled, the abrasion of the belt is reduced, the use period of the belt is prolonged, material spilling is reduced, the quality mixing is avoided, the workload and the labor intensity of clearing materials, replacing the belt and the motor are reduced, the cost outlay is saved, and the smooth working of production is guaranteed.

Description

A kind of belt motor start delay circuit

Technical field

The utility model belongs to the maintenance of electric device field, relates in particular to a kind of reversible travelling belt motor forward and backward protective circuit of start-up time that postpones.

Background technology

Often can use reversible travelling belt in industrial production, when making things convenient for mass transport, also ubiquity two problems that can not be ignored: the one, and belt deviation is serious; The 2nd, motor shaft easily twists off.And cause the main cause of the problems referred to above to have:

1, reversible belt needs often to change direction in the process of convey materials, and the variation of loading and unloading amount in addition or blanking point all can make the stressed change of belt, so easy sideslip;

2, when belt reversing, custom operation or misoperation appear in operative employee regular meeting, because in the motor positive and inverse circuit, stop button SB1 is in normally off, is just playing button SB2 and are being in normally open with the anti-button SB3 of rising; When starting when just playing button SB2, positive contactor coil KM1 gets electric, and positive contactor coil is often opened subsidy contact KM1 adhesive, and the simultaneously positive contactor coil normally closed subsidy contact KM1 that interlocks disconnects, and motor just changes.If in just changeing, play counter-rotating, closed SB3, anti-clinching normally closed contact SB3 disconnection this moment, positive contactor coil KM1 outage, KM1 disconnects thereby positive contactor coil is often opened the subsidy contact, and the positive contactor coil normally closed subsidy contact KM1 closure of interlocking makes positive crossover outage; While is electric owing to counter-rotating contactor coil KM2 gets, and the counter-rotating contactor coil is often opened subsidy contact KM2 closure, and motor is without direct stressed counter-rotating of deceleration.Motor just changes and earlier belt is not stopped in (or counter-rotating) process and directly play counter-rotating (or just changeing), not only lacked the step of adjusting belt, make belt deviation easily, and in this process, the belt forced brake also immediately oppositely quickens to make current of electric strengthen, easily burn motor, and motor shaft oppositely is subjected to strong reversing suddenly, moment of torsion moment increase very easily causes shaft break of motor;

No matter be that belt deviation or motor shaft twist off, all will cause unnecessary loss:

In case belt deviation just will aggravate the wearing and tearing of belt, the belt life cycle is shortened; It is serious to cause belt to spill material simultaneously, and the increasing of material that land easily causes mixed matter, and product quality is reduced; Removing is landed and is expected to have strengthened operating personnel's workload and labour intensity, has consumed great amount of manpower and time.And if shaft break of motor, constitution equipment accident not only then, and loss is also even more serious.Owing to often change belt, motor or motor shaft, both increased attendant's labour intensity, strengthened expense and cost; Also reduced the operating rate of equipment simultaneously, untimelyly also will directly influence production, resulted in greater loss if change.

Summary of the invention

The purpose of this utility model is exactly at the problems referred to above, aim to provide a kind of by postponing belt motor rotating start-up time, thereby reduce Motor torque, prevent the startup protective circuit design of belt deviation.

For this reason, the technical solution taked of the utility model is:

A kind of belt motor start delay circuit, comprise counter-rotating contactor coil interlock normally closed subsidy contact KM2, counter the interlock normally closed subsidy contact KM1 and just playing clinching normally closed contact SB2 of clinching normally closed contact SB3, positive contactor coil that rises, it is characterized in that, in positive crossover and counter-rotating circuit respectively and meet time relay KT1 and KT2; The time relay retarded closing contact KT1 that promptly between the counter-rotating contactor coil of positive crossover is interlocked normally closed subsidy contact KM2 and the anti-clinching normally closed contact SB3 of rising, connects, the positive contactor coil of the circuit that reverses interlock normally closed subsidy contact KM1 with just play the time relay retarded closing contact KT2 that also connects between the clinching normally closed contact SB2.

The beneficial effects of the utility model are:

Adopt the belt motor start delay circuit of the utility model, the motor that can effectively prevent to cause because of misoperation or custom operation has reduced motor shaft and has twisted off accident without the oppositely stressed problem of slowing down directly, has improved motor useful life; Control the belt deviation phenomenon, alleviated the belt wearing and tearing, prolonged the belt life cycle; Reduce belt and spilt material, avoided mixing matter, reduced workload and labour intensity that cleaning is spilt material, changed belt and motor, saved the cost expenditure, guaranteed the direct motion of producing.；

Description of drawings

Accompanying drawing is a belt motor start delay circuit interconnect pattern.

Among the figure: SB1 is a stop button, SB2 is for just playing button, SB3 is the anti-button that rises, SB3 is for just playing the clinching normally closed contact, SB3 is the anti-clinching normally closed contact that rises, KM1 is positive contactor coil, KM1 is that positive contactor coil is often opened the subsidy contact, KM1 is the positive contactor coil normally closed subsidy contact of interlocking, KM2 is the counter-rotating contactor coil, KM2 is the counter-rotating contactor coil normally closed subsidy contact of interlocking, KM2 often opens the subsidy contact for the counter-rotating contactor coil, RT was a thermal element, and KT1 is a positive crossover time relay (or positive crossover time relay normal opened contact, the positive crossover time relay is often opened time closing contact), KT2 is the counter-rotating circuit time relay (or counter-rotating circuit time relay normal opened contact, the counter-rotating circuit time relay is often opened time closing contact).

Embodiment

Below, in conjunction with the accompanying drawings the utility model is described further.By accompanying drawing as seen, the utility model comprises counter-rotating contactor coil interlock normally closed subsidy contact KM2, counter the interlock normally closed subsidy contact KM1 and just playing clinching normally closed contact SB2 of clinching normally closed contact SB3, positive contactor coil that rises, its main feature be in positive crossover and counter-rotating circuit respectively and meet time relay KT1 and KT2; The time relay retarded closing contact KT1 that promptly between the counter-rotating contactor coil of positive crossover is interlocked normally closed subsidy contact KM2 and the anti-clinching normally closed contact SB3 of rising, connects, the positive contactor coil of the circuit that reverses interlock normally closed subsidy contact KM1 with just play the time relay retarded closing contact KT2 that also connects between the clinching normally closed contact SB2.

Operation principle of the present utility model is:

After startup is just playing button SB2, positive crossover time relay KT1 coil gets, positive crossover time relay normal opened contact KT1 closure, the simultaneously positive crossover time relay is often opened time closing contact KT1 and is begun action, several seconds (time can be set) back timing closing, at this moment positive contactor coil KM1 gets electric, and positive contactor coil is often opened subsidy contact KM1 adhesive, the positive contactor coil normally closed subsidy contact KM1 that interlocks disconnects, and motor just changes.

If because operative employee's misoperation or custom operation, in just changeing, play counter-rotating, the closed clinching normally closed contact SB3 that just rises, this moment, the anti-clinching normally closed contact SB3 of rising disconnected, positive contactor coil KM1 and positive crossover time relay KT1 coil blackout, thereby making positive crossover time relay normal opened contact KT1, the positive crossover time relay often open time closing contact KT1 and positive contactor coil often opens subsidy contact KM1 and disconnects, the positive contactor coil normally closed subsidy contact KM1 closure of interlocking, motor is just changeing gradually and is stopping.Simultaneously, because counter-rotating circuit time relay KT2 coil gets, counter-rotating circuit time relay normal opened contact KT2 closure, and this moment reverse the circuit time relay often open time closing contact KT2 begin the action, several seconds (duration can be set, with enough motors just changeing stop and settling out after reverse again) back timing closing, closed back counter-rotating contactor coil KM2 gets, the counter-rotating contactor coil is often opened subsidy contact KM2 closure, and motor is just changeing through slowing down and stopping the back and realize that safety reverses.

Just change in like manner by counter-rotating.

Claims

1, a kind of belt motor start delay circuit, comprise counter-rotating contactor coil interlock normally closed subsidy contact (KM2), counter the interlock normally closed subsidy contact (KM1) and just playing clinching normally closed contact (SB2) of clinching normally closed contact (SB3), positive contactor coil that rises, it is characterized in that, in positive crossover and counter-rotating circuit respectively and be connected to the time relay (KT1) and (KT2); Promptly at the counter-rotating contactor coil of positive crossover interlock normally closed subsidy contact (KM2) and the anti-time relay retarded closing contact (KT1) of connecting between the clinching normally closed contact (SB3) that rises, the positive contactor coil of the circuit that reverses interlock normally closed subsidy contact (KM1) with just play the time relay retarded closing contact (KT2) of also connecting between the clinching normally closed contact (SB2).