SU421985A1 - DEVICE FOR REMOTE CONTROL OF DISCRETE DISPENSERS - Google Patents

Description

one

The invention relates to devices that specify the duration and number of cycles per unit of operation of discrete metering devices moving various materials, and can be used to transport fine mineral raw materials along transport lines connecting various process equipment in chemistry, enrichment and metallurgy.

A device for remote control of a discrete metering device is known, comprising a control impulse time-delay implementation unit, consisting of a motor time relay and a movable dial-wheel with a lock.

The known device has insufficient accuracy.

The proposed device differs in that it contains a block of continuous change of the task for the duration of the control pulse consisting of a reversing motor connected through a reducer with a worm wheel, on the axis of which a scale disk with a lock is fixed.

This improves the accuracy of the device.

Pa figs. 1 shows the kinematic scheme of the proposed device; in fig. 2 is a section along the line A-A in FIG. one; pas figs. 3 is a section along BB in FIG. one; in fig. 4 - electric pinch scheme of the device.

The implementation unit of a given time delay consists of a synchronous motor 1, a sitting gear 2 connected to a clutch disc 3, which is free to sit on the clutch axis 4, and a retracting spring 5. For transmitting rotation from the synchronous motor to the main axis 6, i.e. . To start the countdown of a given time delay, an electromagnet 7, a disk 8, rigidly connected to tribe 9, and

gear 10, rigidly fixed on the main axis. On the main axis 11, the stops 11 are rigidly fixed, the purpose of which is to influence the cams 12, which switch the output contacts 13. The return spring 14 serves to return the unit to its original position.

The unit for continuous measurement of the task is structurally combined with a feedback device for remote signaling of a given time out and consists of a disk 15,

on the cylindrical surface of which are placed a rheostat sensor 16 with a sliding contact 7 and a digitized scale 18; on the disc itself is fixed a retainer 19. The disc is rigidly fixed on the axis 20. On the SToit the same axis

a worm gear 21 secured with a worm 22. The screw axis is connected through a gearbox to a reversible motor 23.

An input relay kit includes an electromechanical interlock assembly for the unit

the implementation of a given excerpt from the lever 24,

rigidly mounted on the main axis 6, the fixed stop 25, the lever 26, the finger 27, the switch 28 (the electromechanical interlock assembly is separately shown in FIG. 3).

The task block also has an electromechanical interlock unit consisting of a lever 29 rigidly fixed on the axis 20, and two switches 30 (on the switch in each winding of the reversing motor).

To reduce the impact when returning, the relay has a centrifugal brake 31, firmly seated on the same axis with tribe 32.

The power supply circuit of the reversing motor windings is turned off (Fig. 4) with the unlocked buttons 33 ("More) and 34 (" Less ") removed from the relay. A predetermined time delay is signaled by instrument indicator 35, which indicates a voltage drop on that part of the resistance sensor 16, which corresponds to the set time delay. The scale of the indicator 35 has the same graduation as the scale 18 of the display sensor. Power supply to the resistance sensor comes from a standard source of stabilized power 36.

The time delay setting is changed by pressing one of the buttons, as a result of which the nitane is fed to the corresponding winding of the reversing motor 23, rotates associated with the double shaft through the reducer of the worm to 22, the worm gear 21 and the axis 20, which is rigidly rotated. ukrenleno worm wheel. Together with the axis 20, a disk 15 with a scale, a rheostat sensor and a latch rigidly sitting on it comes into rotation. The latch 19, moving toward the "More," moves away from the norms 11, which follow him due to the action of the return spring 14 to the predetermined position. If the latch 19 moves in the direction of "Meishe", then it moves the stops 11 to a predetermined position, overcoming the resistance of the spring 14. The speed of rotation of the axis 20 is chosen close to the speed of rotation of the axis 6, and smaller than it in order to prevent mechanical damage in case of remote activation reversing motor in the direction of "Less at the moment or when the clutch electromagnet is activated.

The signaling of the setting drive disk (Fig. 4) occurs as a result of the removal of voltage from the section a-b of the resistance sensor with the help of sliding contact 17 to the device-indicator. The amount of set time delay is calculated on a scale indicator device. When the specified time delay value is reached, the button is released. The device is ready for operation.

Upon receipt of the input sigial on the time reference, the electromagnet 7 is triggered (Fig. 1), or the electromagnet 7 (with the synchronous motor 1 already running), or a synchronous motor and electromagnet simultaneously. Scheme

the relay allows any of these combinations to be made depending on the required time delay accuracy.

Rotation from the engine 1 through the reduction gear 2 is transmitted to the clutch disc 3, which is free to sit on the clutch axis 4. When the electromagnet 7 is turned on, the clutch disc 3 engages with the disc 8, which is rigidly connected to the tribe 9. Rotation from the disc

the clutch 8 is transmitted to the gear 10, rigidly fixed on the main axis 6, on which the stops 11 are located. Depending on the set time delay, the stops 11 are at different distances from the cam 12. The smaller the set time delay, the closer the stops to the cams are and the There will be a shift of cams. When shifting the cams 12 under the influence of the stops 11, the contact system 13 is switched. The relay has two stops 11 and two contact soils for non-switching. One switching contact implements the command output signal, the second switching contact opens the power supply of the electromagnet 7, passing through n. 3. output contact (according to the operating conditions of the circuit, the second switch contact can also perform command functions).

After working off a given time delay, the lying 1, the main axis 6 with the unors 11 ceases, since the winding of the electromagnet (or electromagnet and motor) is turned off by its own n. h contact or closed contact of other devices that are controlled by time relay contacts.

Electromechanical blocking in the event of a circuit failure or inattention of the task setting worker prevents breaks and breaks by the end switches of the supply circuit of the windings of the synchronous and reversing motors.

The synchronous motor locking device works as follows.

At the start of the relay, the lever 24, rigidly fixed on the axis 6, is pressed against the fixed stop 25 by the spring 14. When the maximum angle of rotation of the axis 6 is being worked out, the finger 27 of the lever 26 turns off the switch 28 in the engine power supply circuit.

The locking of the reversing motor is that in the extreme positions of the axis

20, the lever 29, which is rigidly mounted on the axis 20, acts on one of the two switches 30 and de-energizes the corresponding winding of the reversing motor. The relay returns to its original position after the electromagnet 7 is disconnected. In this case, the clutch disc 3 is disengaged from the disc 8 by the action of spring 5, and the return spring 14 returns the main axis 6 with rest 11 to its initial position

19 position.

To reduce impact, when the relay returns, it has a centrifugal brake 31, which is driven through rotation 32 from gear 10.

To use the proposed device in the automatic control scheme as an actuator, it is sufficient to connect the output terminals of the capacity controller of the apparatus to which the transported material is fed to terminals 37-38 and 39-40 (Fig. 4), depending on the required change in material flow.

The subject of the invention. A device for remote control of discrete metering devices, comprising its unit for implementing a given time delay of control, its pulse, made in the form of a motor time relay and a movable diskscale with a lock, distinguished by the fact that in order to improve the accuracy of the device, it It contains a continuous change control unit for the duration of the control pulse, consisting of a reversible motor connected through a gearbox to a worm gear, on the axis of which a dial-scale with a lock is fixed.

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