CN201008803Y

CN201008803Y - Automatic feeding controller of rock material crusher

Info

Publication number: CN201008803Y
Application number: CNU2006201621857U
Authority: CN
Inventors: 吴爱营
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-15
Filing date: 2006-12-15
Publication date: 2008-01-23
Anticipated expiration: 2016-12-15

Abstract

The application discloses an automatic feed control device for stone cracker which comprises a prior rectification circuit of current transformer, a control integrated circuit, a direct current supply circuit and an alternating current contactor. The automatic feed control device is characterized in that, an electric on-off circuit is also included and the electric on-off circuit has the output end of rectification circuit of current transformer connected to a potentiometer and to a voltage-regulator diode and finally to the base of a triode; a collector of the triode is connected with an actuating coil of a first relay and then with an anode of the direct current supply circuit, an emitter of the triode is connected with a cathode of the direct current power supply to form a loop; a normally open contact of the first relay is concatenated with the anode of the direct current supply circuit and the input connection point of the control integrated circuit in series, the output end of the control integrated circuit and the cathode of direct current power supply form a loop through the actuating coil of a second relay, the normally open contact of the second relay is concatenated in an alternating current loop of the actuating coil of the alternating current contactor. The control device in the application can adjust the start load of the main electric motor through the potentiometer of the electric on-off circuit, thereby accommodating various feed states in quarry and has a wide application.

Description

Stone-crushing mechanical feed controller

Technical field

Please relate to stone-crushing in this.

Background technology

Present stone-crushing is made up of broken head and drawing-in device.Broken head and drawing-in device are dragged by main motor and auxiliary-motor respectively, by the running of two motors of Artificial Control.When broken head entered big stone or feeding capacity greater than crushing, main motor was with overload operation, and final power source trip quits work, and needed to close auxiliary-motor by the workman this moment and stopped feeding, restarted after artificial the removing again.This disintegrating machine can not continuous operation, and influence is produced, and artificial removing obstacles needs the repeatable operation motor, and labour intensity is big.

Generally adopt a kind of over current of motor protector in the market; this current protector is mounted in the power circuit; be used to protect the situation of motor self overload running, its structure mainly is made up of current transformer rectification circuit, control integrated circuit, DC power-supply circuit and A.C. contactor.When motor excess load or short circuit, current transformer produces strong signal and makes control circuit work, and the electric motor protecting effect is played in the A.C. contactor outage.

Summary of the invention

The application is for addressing the above problem, and the principle according to the over current of motor protection proposes a kind of stone-crushing mechanical feed controller.

The application's controller is improved on the basis of existing motor overcurrent protection device.It comprises existing current transformer rectification circuit, control integrated circuit, DC power-supply circuit and A.C. contactor, it is characterized in that also comprising electronic switching circuit, this circuit is to insert potentiometer and Zener diode successively to transistor base on the inductor rectification circuit output end; Transistor collector inserts behind first actuating of relay coil to the DC power-supply circuit positive pole, and the triode emitter-base bandgap grading connects the dc power supply negative pole and forms the loop; First relay normally open contact is serially connected in the anodal and control integrated circuit input contact of DC power-supply circuit, the control ic output forms the loop through second actuating of relay coil and dc power cathode, and second relay normally open contact is serially connected in the A.C. contactor actuation coil ac circuit.

When the application's controller uses, require at least one phase power line of main motor to pass the current mutual inductor coil of overcurrent protection controller, the three phase mains of auxiliary-motor is connected on the controller A.C. contactor normally-closed contact.According to the size that disintegrating machine runs well and loads, adjust the action current of A.C. contactor by the controller voltage-regulating circuit.

When main motor overload, the induced-current increase makes the triode conducting, connects the control integrated circuit after the first relay coil conducting closing of contact, the second relay power closing of contact, thereby make the ac contactor coil energising, the contact disconnects, and auxiliary-motor quits work.First relay contact disconnects after main motor load reduces, and the control integrated circuit quits work, the ac contactor contact adhesive, and auxiliary-motor recovers running, feed again automatically.Determine the running current of main motor to make the disintegrating machine head be in the continuous duty of nonoverload all the time by the resistance sizes of adjusting potentiometer.

Owing in the power supply circuits of disintegrating machine two motors, connected the application's controller, realized disintegrating machine according to the load condition mechanical feed, no longer with manually stopping feeding.And can adjust feeding capacity automatically according to the size of broken head load, and avoided frequent overload trip of main motor and artificial removing obstacles, realize producing continuously.The application's controller can be adjusted the starting load of main motor by the potentiometer of electronic switching circuit, so can adapt to the various feeding situations of building stones factory, adapts to wide.

Description of drawings

Fig. 1 is the application's a control circuit schematic diagram, is the circuit diagram of an embodiment of controller in the empty frame.

The specific embodiment

The structure of controller at first is described according to Fig. 1.Shown in the empty as shown in Figure 1 frame, by current transformer L, diode D, potentiometer R ₂With integrated circuit NE555N, constituted inductance-rectification-pressure regulation-control circuit.Transformer B, whole bridge rectifier Z and capacitor C ₂Constitute DC power-supply circuit; The coil of relay is connected between integrated circuit NE555N and the commutation supply voltage circuit negative pole, in the output branch road of diode D, is connected with resistance R in turn ₁, adjustable resistance R ₃, voltage-stabiliser tube W and triode BG, the colelctor electrode cut-in relay J of triode BG ₁Coil, and connect with DC power-supply circuit is anodal; Relay J ₁Two contacts be connected on the power input of dc power anode and integrated circuit respectively, integrated circuit NE555N output termination second relay J ₂Actuation coil, J ₂Normally opened contact be serially connected in A.C. contactor J ₃Actuation coil on.The foregoing circuit components and parts are assembled in the housing of controller.Wherein main motor D D is convenient to wear in the housing exposed at both sides in the core hole, two ends of current transformer ₁Power line, A.C. contactor J ₃Terminals be connected on the terminal box of housing.

During installation, as long as with main motor D D ₁Power line pass current transformer L, auxiliary-motor DD ₂Power line is connected on the terminal box on the three phase mains, A.C. contactor J ₃Actuation coil is connected in the AC power two-phase, connects three-phase power line and gets final product work.

Enforcement for the application further specifies operation principle again.

A.C. contactor J ₃Coil in sealed in relay J ₂Normally-closed contact, when main current of electric did not reach adjusted value, NE555N is output not, J ₂Be failure to actuate; When reaching adjusted value, voltage of NE555N output makes J ₂Closure, thereby contactor J ₃Coil electricity cuts off the contact, closes the feeding machine power supply.Because the control of integrated circuit, only it just can cut off J under the situation that loses the integrated circuit power supply ₂Power supply, make J ₂Disconnect J ₃Closure starts feeding machine.

Adjustable resistance R ₂Be used for feeding machine and close the afterpotential adjustment, adjust this current potential and just adjust disintegrating machine head motor D D ₁Input power, generally be adjusted to 2 times of motor power (output), just cut off feeding machine when reaching this current value automatically.

Adjustable resistance R ₃The afterpotential adjustment that is used to start shooting, after feeding machine is closed, because the running of main motor, the passing that the electric current of main motor can be in time at this moment and reducing, triode BG is become by conducting and ends J when little blanking voltage to voltage-stabiliser tube W ₁Losing voltage makes contact disconnect relay J ₂Closure, contactor J ₃Closure also begins feeding.

Claims

1. stone-crushing mechanical feed controller, it comprises existing current transformer rectification circuit, control integrated circuit, DC power-supply circuit and A.C. contactor, it is characterized in that also comprising electronic switching circuit, this circuit is to insert potentiometer and Zener diode successively to transistor base on the inductor rectification circuit output end; Transistor collector inserts behind first actuating of relay coil to the DC power-supply circuit positive pole, and the triode emitter-base bandgap grading connects the dc power supply negative pole and forms the loop; First relay normally open contact is serially connected in the anodal and control integrated circuit input contact of DC power-supply circuit, the control ic output forms the loop through second actuating of relay coil and dc power cathode, and second relay normally open contact is serially connected in the A.C. contactor actuation coil ac circuit.