CN2391686Y

CN2391686Y - Soft starting control device for heavy duty ball mill

Info

Publication number: CN2391686Y
Application number: CN 99208678
Authority: CN
Inventors: 刘小平; 毛世文
Original assignee: WULING GROUP CO HUNAN PROV
Current assignee: WULING GROUP CO HUNAN PROV
Priority date: 1999-05-04
Filing date: 1999-05-04
Publication date: 2000-08-16
Anticipated expiration: 2009-05-04

Abstract

The utility model discloses a soft starting control device for heavy duty ball mill, which comprises a main return circuit of a motor, a contactor km 2, and a soft start controller AST. One soft start controller is used for controlling and starting bypassed one or more motors, and a torque is regulated and started via the soft start controller for protecting a driving mechanism and realizing centralized control. The utility model can save hydraulic couplers, etc. and have the advantages of less repair and less energy consumption.

Description

Large-tonnage ball mill soft start-up control device

The utility model relates to a kind of electric motor starting control device, particularly a kind of large-tonnage ball mill soft start-up control device.

At present, in ceramic industry is produced, large-tonnage ball mill start-up control mostly is to adopt following dual mode: the one, mechanically install fluid coupling additional, electric going up used squirrel-cage motor, adopt Y one △ to start or self coupling reduced-voltage starting mode, the 2nd, mechanically install fluid coupling additional, electric going up used wound-rotor motor, adopts the frequency sensitive trheostat Starting mode.The former impacts big to electrical network; The latter adopts wound-rotor motor, and the equipment heaviness costs an arm and a leg, and maintenance capacity is big.The both is mechanically installed fluid coupling additional, has increased the mechanical breakdown point, often needs to safeguard.

The purpose of this utility model is to provide a kind of electrical control gear for large-tonnage ball mill soft start.

The purpose of this utility model is to realize by the large-tonnage ball mill soft start-up control device of following structure.It comprises motor main circuit operation contactor and soft start controller AST, operation contactor contact lower end at every motor main circuit is connected to soft start controller AST respectively and after connecing a starting contactor contact, is connected to the normal opened contact serial connection auxiliary reclay coil of starting contactor at the control end of soft start controller AST; The control loop of starting contactor is that the normally closed contact of serial connection shutdown switch S2 after being connected in series control relay normal opened contact and starting switch S1 and being connect the starting contactor normal opened contact by change-over switch Q1, operation contactor connects the starting contactor coil; The control loop of operation contactor is to connect the operation contactor coil after connecing the normal opened contact of control relay coil and auxiliary reclay respectively and connect the normal opened contact that moves contactor behind change-over switch Q2 serial connection shutdown switch S3 and the SB1.Can and connect more than two or two on the soft start controller AST and connect motor through starting contactor, the starting contactor contact is connected to motor main circuit operation contactor contact lower end, is connected to the normal opened contact serial connection auxiliary reclay coil of starting contactor at the control end of soft start controller AST.

1 the form that the utility model starts and connects by the electrical control of adopting soft start controller AST to a plurality of motors; and pass through soft start controller AST and regulate detent torque with the protection gearing; realize centralized Control; and equipment such as fluid coupling have been saved; reduce maintenance capacity, also reduced energy consumption.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Fig. 1 is a major loop electrical schematic diagram of the present utility model;

Fig. 2 is a control loop electrical schematic diagram of the present utility model.

By Fig. 1 and Fig. 2 as can be known, the utility model comprises motor main circuit operation contactor and soft start controller AST, operation contactor contact lower end at every motor main circuit is connected to soft start controller AST respectively and after connecing a starting contactor contact, is connected to the normal opened contact serial connection auxiliary reclay coil of starting contactor at the control end of soft start controller AST; The control loop of starting contactor is that the normally closed contact of serial connection shutdown switch S2 after being connected in series control relay normal opened contact and starting switch S1 and being connect the starting contactor normal opened contact by change-over switch Q1, operation contactor connects the starting contactor coil; The control loop of operation contactor is to connect the operation contactor coil after connecing the normal opened contact of control relay coil and auxiliary reclay respectively and connect the normal opened contact that moves contactor behind change-over switch Q2 serial connection shutdown switch S3 and the SB1.

Now be described in further detail with regard to 1M electric motor starting, the method for operation.In the time must starting the 1M motor, the three-position switch Q1 that is equipped with on the guidance panel with electrical control cabinet pushes the position No. 1, make 1 of Q1,2 closings of contact, main auxiliary machine selector switch Q2 pushes " main frame " position, make 1 of Q2,2 closings of contact, then control relay K17 coil is charged, the normal opened contact closure of its relay K 17, after confirming that this mechanical shift fork leaves jaw clutch, click No. 1 machine " host-initiated " the button S1 on the electrical control cabinet guidance panel, then power supply is through switch Q1, relay K 17, the normal opened contact of starting switch S1, the normally closed contact of shutdown switch S2, normally closed contact and the limit switch 1ST of operation contactor KM2, arrive starting contactor KM1 coil, make it charged, its normal opened contact KM1 closure, when pressing starting switch S1, the RUN that another of starting switch S1 connected soft start controller AST to normal opened contact holds, and starts soft start controller AST; Motor starts through the starting contactor KM1 of soft start controller AST main contact, and " starting indication " lamp H1 is bright.As must stop to start the time, then press shutdown switch S2, the normally closed contact of its shutdown switch S2 disconnects, and the outage of 1M motor stops to start.After motor 1M starts, automatically detect that electric current reaches the motor rated current or below the rated current through soft start controller AST, its interior contacts R2A, the R2C closure, normal opened contact (this moment is closed) through starting contactor KM1 is connected auxiliary reclay K21 coil, auxiliary reclay K21 normal opened contact closure in the operating loop, make the control power supply through 1 of change-over switch Q2,2 contacts, the normally closed contact of shutdown switch S3, the normally closed contact of shutdown switch SB1, auxiliary reclay K21 normal opened contact, electrothermal relay K1 normally closed contact, connect operation contactor KM2 coil, by the self-insurance of operation contactor KM2 normal opened contact, start the normally closed contact disconnection of loop by operation contactor KM2, automatically switch to operating loop, at this moment, the 1M motor is by electrothermal relay K1, the power supply of operation contactor KM2 main contact, lamp H1 goes out " to start indication ", " operation indication " lamp H5 is bright, and the 1M motor changes normal operating condition over to.As must stop No. 1 machine the time, by No. 1 machine " operation stops " the button S3 on the electrical control cabinet guidance panel, the normally closed contact of halt switch S3 disconnects, thereby has disconnected operation contactor KM2 loop, and motor KM1 shuts down.In the time must promptly stopping motor 1M in the working site, press the halt switch SB1 on the motor, the normally closed contact of halt switch SB1 is disconnected, operating loop disconnects, and the 1M motor is shut down.When change-over switch Q1 pushes other positions when starting other motors, it starts, the method for operation is the same with the 1M motor of above-mentioned control.If in the time of must promptly stopping all motors, by " suddenly stopping " the button S0 on the electrical control cabinet guidance panel, the normally closed contact of power switch S0 disconnects, and starts loop and operating loop and is disconnected entirely, thereby all motors are quit work.

Claims

1, a kind of large-tonnage ball mill soft start-up control device, it comprises motor main circuit operation contactor and soft start controller AST, it is characterized in that: the operation contactor contact lower end at every motor main circuit is connected to soft start controller AST respectively and after connecing a starting contactor contact, is connected to the normal opened contact serial connection auxiliary reclay coil of starting contactor at the control end of soft start controller AST; The control loop of starting contactor is that the normally closed contact of serial connection shutdown switch S2 after being connected in series control relay normal opened contact and starting switch S1 and being connect the starting contactor normal opened contact by change-over switch Q1, operation contactor connects the starting contactor coil; The control loop of operation contactor is to connect the operation contactor coil after connecing the normal opened contact of control relay coil and auxiliary reclay respectively and connect the normal opened contact that moves contactor behind change-over switch Q2 serial connection shutdown switch S3 and the SB1.

2, according to the described large-tonnage ball mill of claim 1 soft start-up control device, it is characterized in that: can and connect more than two or two on the described soft start controller AST and connect motor through starting contactor, the starting contactor contact is connected to motor main circuit operation contactor contact lower end, is connected to the normal opened contact serial connection auxiliary reclay coil of starting contactor at the control end of soft start controller AST.