CN218690340U

CN218690340U - Control circuit for automatic material distribution of double-rotor sand making machine

Info

Publication number: CN218690340U
Application number: CN202223011213.3U
Authority: CN
Inventors: 胡世强
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-11-13
Filing date: 2022-11-13
Publication date: 2023-03-24
Anticipated expiration: 2032-11-13

Abstract

The utility model provides a control circuit for automatic material distribution of a double-rotor sand making machine, which comprises a material distribution plate, a material distribution motor, a material distribution speed reducer, a first motor for crushing and a second motor for crushing, wherein the material distribution motor drives the material distribution speed reducer which controls the material distribution plate to swing; when the difference value of the driving currents of the first motor and the second motor is delta I and the absolute value of the delta I exceeds a set value, the output end Y1 of the PLC outputs a signal, the relay K acts in the direction, and the K normally open contact is attracted to the main motor at the side with large current and triggers the BP of the frequency converter to output; the material distributing motor rotates in the same direction, the material distributing plate also rotates in the same direction, and the material distributing motor stops when the material distributing plate rotates in the same direction to a certain angle until the value of the delta I value is zero. The absolute value of the motor delta I is set to be a set value so as to avoid frequent left or right swinging of the material distribution plate and further protect the material distribution motor.

Description

Control circuit for automatic material distribution of double-rotor sand making machine

Technical Field

The utility model belongs to the technical field of mine limestone delivery, especially, relate to an even feed divider of birotor system sand machine.

Background

The double-rotor sand making machine is divided into a left cavity and a right cavity, is respectively driven by two high-power motors (a motor and a motor II), and shares a feeding port and a discharging port with the machine body. Generally, a belt conveyor feeds materials to a double-rotor sand making machine for processing, and stone materials cannot be completely and evenly distributed to a left machine cavity and a right machine cavity when the belt conveyor feeds the materials, so that the processing state that the materials in the machine cavities are more on one side and the materials in the machine cavities are less on the other side is caused. The current of the motor is large when the machine cavity with more materials is processed, and the current of the motor is small when the machine cavity with less materials is processed. When the sand making machine works and produces, the material is fed according to the current of the dragging motor, if the working current difference of the two motors is too large, the current of the motor with large current is used as the basis of the feeding quantity, and the power of the motor with small current cannot be fully utilized to influence the yield.

In addition, the abrasion loss of the hammer head and the sieve plate of the double-cavity of the sand making machine is different, so that the working current of the motor is seriously unbalanced.

Disclosure of Invention

The utility model discloses to foretell technical problem, provide a control circuit of birotor system sand machine and automatic feed divider.

The technical scheme of the utility model is that: a control circuit for automatic material distribution of a dual-rotor sand making machine comprises a material distribution plate, a material distribution motor, a material distribution speed reducer, a first motor and a second motor for crushing, wherein the material distribution motor drives the material distribution speed reducer, and the material distribution speed reducer controls the material distribution plate to swing; the difference value of the driving currents of the first motor and the second motor is delta I, when the absolute value of the delta I exceeds a set value, the output end Y1 of the PLC outputs a signal, the relay K acts, and the K normally-open contact is attracted to the main motor at the side with large current and triggers the frequency converter BP to output; the material distributing motor rotates in the same direction, the material distributing plate also rotates in the same direction, and after the material distributing plate rotates in the same direction to a certain angle, the material distributing motor stops until the value of the delta I value is zero.

Further, when the material distributing plate reaches the action of the forward rotation limit switch B1 or the reverse rotation limit switch B2, the forward and reverse rotation limit switch outputs a signal to the PLC input end XO or X1, at the moment, the material distributing plate rotates to the limit position, the PLC output end outputs an alarm signal, and meanwhile, the forward or reverse rotation of the material distributing motor is stopped.

Has the advantages that:

1. the absolute value of the motor delta I is set to be a set value so as to avoid frequent left or right swinging of the material distribution plate and further protect the material distribution motor.

2. The limiting device is arranged to further protect the crushing motor, and when the material distributing plate exceeds the position, the PLC gives an alarm.

Drawings

FIG. 1 is a schematic diagram of a dual rotor sand maker;

FIG. 2 is a schematic structural diagram of a material separating speed reducer;

FIG. 3 is a first schematic structural diagram of a limit sensor;

FIG. 4 is a second schematic structural view of a limit sensor;

fig. 5 is a schematic diagram of the circuit control of the present invention;

1-a feed inlet, 2-a material distribution plate, 3-a material distribution motor, 4-a material distribution speed reducer, 5-a flywheel, 6-a discharge outlet,

4.1-main shaft of the material distributing plate, 4.2-left limit sensor, 4.3-right limit sensor, 4.4-worm wheel, 4.5-worm and 4.6-worm wheel position transmission contact;

circuit symbol description:

k1-forward rotation relay, K2-reverse rotation relay, PLC-programmable controller, B1-forward rotation limit switch, B2-reverse rotation limit switch and BP-frequency converter.

Detailed Description

The invention will be further described with reference to the accompanying drawings:

referring to fig. 1, the dual-rotor sand making machine comprises a feeding port 1, a material distributing plate 2, a material distributing motor 3, a material distributing speed reducer 4, a flywheel 5 and a discharging port 6, wherein the material distributing plate 2 is arranged in the feeding port 1, the material distributing motor 3 drives the material distributing speed reducer 4, and the material distributing speed reducer 4 drives the material distributing plate 2 to swing and is used for distributing and conveying stone materials to a left cavity and a right cavity when the distributing belt conveyor feeds the materials.

Two left cavities and right cavities are arranged below the feeding hole 1, the left cavities and the right cavities are driven by inner flywheels 5 through two motors (a motor and a motor II) respectively, and a discharging hole 6 is formed in the machine body of the double-rotor sand making machine.

Referring to fig. 2, 3 and 4, the material separating speed reducer 4 comprises a material separating plate main shaft 4.1, a left limit sensor 4.2, a right limit sensor 4.3, a worm wheel 4.4, a worm 4.5 and a worm wheel position transmission contact 4.6.

The utility model discloses a spacing sensor passes the ware for non-contact induction type position, when worm wheel 4.4 is dividing material motor 3, worm 4.5 to drive down rotatory, link firmly worm wheel position conveying contact 4.6 on worm wheel 4.4 and rotate along with worm wheel 4.4, divide material board left side spacing sensor 4.2 and divide material board right side spacing sensor 4.3 motionless, worm wheel position conveying contact 4.6 can be along with worm wheel 4.4 left side, dextrorotation and synchronous revolution.

When the material distribution plate rotates to be close to the left limit sensor 4.2, the material distribution plate 2 rotates left to the maximum angle; on the contrary, when the material distribution plate rotates to be close to the right limit sensor 4.3, the material distribution plate 2 rotates rightwards to the maximum angle; at this time, the PLC gives an alarm.

Left side limit sensor 4.2 or right limit sensor 4.3 tip inductive head and worm wheel position transfer contact 4.6 non-contact between the front end, and keep apart through the organic glass board to avoid the speed reducer incasement lubricating oil to spill over.

The device detects currents dragged by two high-power motors respectively through an AD module of a PLC (programmable logic controller), the PLC adds the currents of the two motors firstly through program operation and then removes 2 to obtain an average value of the currents of the two motors, the program utilizes the average value to compare with the working current of the motor No. 1, Y0 and Y1 of the PLC output on-off signals to start the positive and negative rotation of a distributor motor to drive a material distributing plate to swing left and right (a limit switch) after 2 seconds of time delay, the left and right swinging angles of the material distributing plate are controlled by the PLC according to the unbalanced working currents of the two motors, so that materials at a feeding port are automatically distributed to a left cavity and a right cavity, and the purpose of balancing the working currents of the two motors is achieved.

Referring to fig. 5, the operation principle is as follows:

1. when the driving current of the main motors of the left crusher and the right crusher is larger than or smaller than the average value, the material distributing motor 3 acts, and the left feeding port and the right feeding port are used for distributing materials;

2. when the driving current phase difference value delta I of the main motors of the left crusher and the right crusher is large, the feeding amount of a main motor on one side with large current (for example, the current of the main motor on the left side is 100A, and the current of the motor on the right side is 80A, the average value is 90A +/-5A) is reduced, at the moment, a Y0 output signal of a PLC output end outputs a signal, a relay Kl acts, a Kl normally-open contact 3-4 is attracted and triggers a frequency converter B, namely P output, the distributing motor 3 rotates forwards, the distributing plate 2 rotates leftwards, after the distributing plate 2 rotates leftwards to a certain angle, the driving current of the main motor on the left side is reduced due to the reduction of the feeding amount, and the distributing motor 3 stops working until the delta I value and the average value of the motor on the left side are equal. On the contrary, when the delta I value of the main motor on the left side is smaller than the average value +/-5A (namely the driving current of the main motor on the right side is larger than the driving current of the main motor on the left side), the output end Y1 of the PLC outputs signals, the relay K2 acts, the K2 normally-open contacts a-c attract and trigger the frequency converter BP to output, the material distribution motor 3 rotates reversely, the material distribution plate 2 rotates rightwards, after the material distribution plate 2 rotates rightwards to a certain angle, the driving current of the main motor on the left side is increased due to the increase of the feeding amount, and the material distribution motor 3 stops working until the delta I value and the average value of the main motor on the left side are equal.

3. When the material distributing plate 2 is driven by the material distributing motor 3 to rotate leftwards or rightwards until the forward rotation limit switch B1 or the reverse rotation limit switch B2 is reached to act, the forward and reverse rotation limit switch outputs a signal to the PLC input end XO or X1, at the moment, the material distributing plate is shown to rotate to the limit position, the PLC output end outputs an alarm signal, and meanwhile, the material distributing motor stops rotating forwards or reversely.

Claims

1. A control circuit for automatic material distribution of a double-rotor sand making machine is characterized by comprising a material distribution plate, a material distribution motor, a material distribution speed reducer, a first motor for crushing and a second motor for crushing, wherein the material distribution motor drives the material distribution speed reducer, and the material distribution speed reducer controls the material distribution plate to swing;

the difference value of the driving currents of the first motor and the second motor is delta I, when the absolute value of the delta I exceeds a set value, the output end Y1 of the PLC outputs a signal, the relay K acts, and the K normally-open contact is attracted to the main motor at the side with large current and triggers the frequency converter BP to output;

the material distributing motors rotate in the same direction, the material distributing plates also rotate in the same direction, and the material distributing motors stop when the absolute value of the delta I value is smaller than a set value after the material distributing plates rotate to a certain angle in the same direction.

2. The control circuit according to claim 1, wherein when the material distributing plate reaches the action of the forward rotation limit switch B1 or the reverse rotation limit switch B2, the forward rotation limit switch outputs a signal to the PLC input XO or X1, which indicates that the material distributing plate has rotated to the limit position, and the PLC output outputs an alarm signal, and stops the material distributing motor from rotating in the forward direction or the reverse direction.