RU2080282C1 - Garage lift control device - Google Patents

Abstract

FIELD: mechanical engineering; lifting and transportation mechanisms. SUBSTANCE: device has reversible magnetic starter with power contacts and UP and DOWN magnetic starter, maximum current relays with make and break contacts, LIFT, LOWER and START push- buttons, voltage relays, resistor, electric lamp, operating lower and emergency upper and lower limit switches, and lift electric motors. Device has additional three-phase magnetic starter and single-phase switch. Device makes it possible to stop lift without time delay when any electric motor stops. When UP or DOWN starter power contacts are closed, lift is stopped automatically and it can be started only after elimination of sticking. Simultaneous switching on of UP and DOWN starters when LIFT and LOWER buttons are pressed on simultaneously is also prevented. EFFECT: improved reliability of operation. 2 cl, 4 dwg

Description

 The invention relates to lifting and transport mechanisms.

 A device is known that contains a three-phase circuit breaker, six reverse magnetic starters, in which the “Up” actuator and the “Down” actuator, a fuse, nine resistors, nine electric lamps, twelve overcurrent relays, two time relays, three voltage relays, six lower , six emergency upper and six emergency lower limit switches, the "Up" button and the "Lower" button with their opening contacts, six button stations, which have the "Up" and "Down" buttons, with one terminal an aromatic switch for connecting a three-phase supply network, the other one and the third through the power contacts of reverse magnetic starters, and the other through series-connected windings of one, another overcurrent relay and power contacts of reverse magnetic starters are connected to the terminals of the stator windings of the electric motors to which the zero point of the mains is connected between the last and the fuse of the chain with a resistor and an electric lamp connected in series, the closing contact of one maximum relay OKA, the fourth resistor and fourth electric lamp, the closing contact of the sixth overcurrent relay, the ninth resistor and the ninth electric lamp, six emergency lower limit switches and a coil of one voltage relay, six emergency upper limit switches and a coil of another voltage relay, the closing contact of one time relay and coil the latter is shunted connected in series by another resistor and another electric lamp, some conclusions: coils of a time relay and another resistor through connected in parallel disconnect The contact contacts of six overcurrent relays are connected by one terminal with one terminal of the make contacts of another group of overcurrent relays, via the “Lift” button, the make contact of another voltage relay and the contact of one voltage relay with a fuse, and through the “Lower” button with the connection point of the terminals: one of the make contacts of three voltage relays and another time relay, the coil of the third voltage relay is shunted connected in series with the third resistor and the third electric lamp, the other output of the make contact the act of another time relay is connected to the other outputs of the six make contacts of another group of contacts of other overcurrent relays, and connected in series: the make contact of the other time relay, the open contact of the first time relay, the third voltage relay, the open contact of the "Lower" button, connected in series to the open: contact of one “Up” button, contact of one “Down” motion starter and coil of one “Up” motion starter, opening: contact of the sixth “Up” button, contact sixth about the “Down” motion starter and the coil of the sixth “Up” motion starter, as well as through the opening: contact of the “Up” button, contact of the first “Down” button, one lower working limit switch, opening contact of the first up-motion actuator and the coil of the first the “Down” motion starter, the opening contact of the sixth Down button, the sixth lower working limit switch, the opening contact of the sixth “Up” motion starter and the sixth “Down” motion starter coil, to the connection point of the terminals of the other contact of the other relay of the voltage and the “Up” button, one output of one “Up” button is connected, the other output of which is connected to the output of the opening contact of it, to the connection point of the other output of the “Lower” button and one output of the closing contact of another time relay, one output of the first Down button is connected , the other terminal is connected to another terminal of its opening contact, one terminal of the sixth “Down” button, the other terminal is connected to its opening contact.

The disadvantages of the existing device are:
low operational safety: the safety nut is screwed onto the rack screw when the power contacts of the Down trigger are stuck;
the upper emergency limit switches are cut off when the power contacts of the "Up" motion starter stick;
the time delay of 15 s for the shutdown of the lift when the motor is stopped is large, because a phase failure caused by the windings of the first and other overcurrent relays causes them to fail in their functions, the motor rotor will not rotate, and a current of 1.3 will flow through its stator windings for 15 s times greater than the operating current and they will fail, an emergency situation is created, which can also be created when one time relay fails;
low technical reliability;
complex design and a large number of contact joints; there is no protection of the lines of the supply network, power contacts of the reverse magnetic starter from short circuit when individually controlled by the buttons of the push-button station (the emergency switch for protection is not suitable, since it is six times coarser than the protection positions);
lack of blocking for simultaneous activation of the “Up” and “Down” movement actuators while simultaneously pressing the “Up” and “Down” buttons on the button stations, which leads to failure;
a large number of contact connections of the "Up" buttons and the "Down" buttons
a high probability of non-opening of their NC contacts, which leads to the simultaneous supply of voltage to the mains through the NC contacts of the buttons "Raise" and "Lowering" on the coil of the reversing magnetic starter and its failure;
frequent alignment of the levers of the working lower limit switches, which do not return to their original state after each actuation of the latter, which leads to the failure of them, as well as the lower limit switches;
poor fastening of push-button stations on the racks of the elevator and they break off from flexible hoses and hang on electric wires, the penultimate ones are stretched.

 The listed shortcomings on the four lifts of our company ATP-13028 led to considerable material losses: many reverse magnetic starters, several lower working limit switches and their levers, one electric motor, and large losses of time to restore their working condition failed.

 We have developed several types of devices. The penultimate type of device already had the entire description, but the device also had the following drawbacks: a large number of contact connections, which leads to low reliability, and the lack of blocking for simultaneous activation of the "Up" motion trigger and the "Down" motion trigger while simultaneously pressing Up button and Down button on key stations.

 After repeated conversations with high-level auto mechanics TO-1, TO-2 and ZTR about the operation of lifts and their use, work began on installing buses with body support platforms on platforms for support beams for lifting racks of lifting racks without individual installation using push-button stations. It turned out that there were absolutely no problems, so we settled on the last type of device, which is proposed for consideration.

 In FIG. 1 and 2 depict an electrical diagram of the proposed device for controlling a garage lift.

 A device comprising a reversing magnetic starter 1 with a starter 2 for an “Up" motion and a starter 3 for a "Down" motion, a maximum current relay 4 with a closing contact core (KS) 4.1, a maximum current relay 5 with an opening movable KS 5.1 and a stationary KS 5.2 and winding 6, fuse 7, button 8 "Lift" and its NC contact 8.1, button 9 "Lower" and its NC contact 9.1, resistor 10, lamp 11, lower working limit switch 12, emergency upper limit switch 13 and lower limit switch 14 , while some conclusions with The main contacts 2.1 and 3.1 of the reverse magnetic starter 1 are connected to the leads of the stator windings of the electric motor 15, the motor housing 15 20 is connected to the zero point 21 of the supply network, characterized in that it is equipped with a three-phase magnetic starter 22, a voltage relay 23, a single-phase switch 24, a button 25 "start" with the opening contact 25.1 and the closing contact 25.2, while the conclusions of the stator windings of the electric motors X 16 20 are connected to one terminal of the power contacts 2.1 and 3.1 of the reverse magnetic starter 1, relay 4 maximum ka with magnetically controlled KS 4.1, whose winding with the number of turns provides opening KS 4.1 when stopping, for example, an electric motor 15, its center is placed against the center of contact of the working section KS 4.1, relay 5 maximum current magnetically controlled KS 5.1 and 5.3, which is equipped with a winding 26 and a winding 27, the length of the winding 26 is greater than the length of the winding 6, and the length of the winding 27 is less than the last, the centers of the windings 6, 26 and 27 coincide and are located behind the centers of the working sections of the contacts of the movable contact cores 5.1 and 5.3, but closer to the first with the number of turns, providing which have excellent sensitivity, overcurrent relays 5 are located on a coil 28, at one end of which there is a screw 29 perpendicular to its axis, between which and a sealed cylinder 30 of magnetically controlled contacts 5.1 and 5.3 there is a rubber gasket 31 to soften the stop of screw 29 in the latter when it is secured in coil 28 (FIG. 3), the conclusions are one and the third, and the other through the winding of the overcurrent relay 4 is connected to the terminals 32, 33 and 34, which are also used to connect the three-phase power supply network, the other conclusions through the power contacts 22.1 of the magnetic starter 22 are connected to other terminals of the power contacts 2.1 and 3.1 reverse magnetic starter 1, the terminals of the stator ohm magnetic starter 1 are connected to one of its terminals, the terminals of the stator windings of the electric motors 16 20 are connected to one of the terminals, to the terminal 34 connected in series, I will turn off the single-phase the switch 24 and the fuse 7 are connected chains connected in series: movable KS 5.3 which one contact is open with a movable KS 5.1 relay 5 maximum current, which are bridged connected in series disconnecting a movable contact 23.1 and a fixed contact 23.2 voltage relay 23 and the button 25 "Start", coil starter 22, emergency upper limit switch 13, which is bridged by the opening contact 2.2 of the actuator 2 "Up", lower limit switch 14, which is bridged by the opening contact 3.2 start Atelier 3 of the "down" movement, opening contact 2.3 of the starter 2 of the "up" movement and contact 3.3 of the starter 3 of the "Down" movement, which are bridged by the block contact 22.2 of the starter 22, opening the stationary contact 23.3 and the movable contact 23.4 of the voltage relay 23, zero point 21 mains, opening the moving contact 23.1 and fixed contact 23.2, opening contact 25.1 of the 25 start button, coil of voltage relay 23 and fixed contact 23.5 of the latter, resistor 10, electric lamp 11 and fixed contact 23.5 of voltage relay 23, through closing relay 4.1 of one relay 4 poppy mimalnogo current that is shunted by closing contact 25 25.2 button "Start" button 8 connected "Lift" break contact buttons 9.1 9 "Lower" coil 2 of the magnetic actuator movement "Top" and the point of connection pins times. contact. 2.3, 3.3, con. off. 12, 14 and circuit. block contact 22.2, as well as the opening contact 8.1 of the button 8 "Lift", the button 9 "Lowering", the coil of the magnetic actuator 3 movement "Down" and the other output of the lower working limit switch 12, combined the findings of the fixed contact 23.6, one opening contact 25.1 buttons 25 "Start", a fixed KS 5.5 closes with a movable KS 5.3 relay 5 of the maximum current. and one coil of the voltage relay 23, the other terminal of which is connected to the terminal of the fixed KS 5.4 which closes the maximum current relay 5 with the movable KS 5.1. In addition, the device has magnetically controlled contacts 5.1 and 5.3, containing a sealed container 30, in which there is one stationary KS 5.2 with non-magnetic conductive material with two contacts and installed with ends at the ends of the sealed container 30, movable KS 5.1 and 5.3, fixed KS 5.4 and 5.5 s ferromagnetic material, while a fixed COP 5.4 with a section with a reduced cross section 35 and a movable COP 5.1 with an anchor 36 are installed in one end of the sealed container 30 so that the anchor 36 is located opposite the section with reduced section 35, a fixed KS 5.5 with a section with a reduced section 37 and a movable KS 5.3 with an anchor 38 are installed in the second end of the sealed cylinder 30 so that the anchor 38 is opposite the section with a reduced section 37, the free ends of the fixed KS 5.4 and 5.5 are located inside a sealed container 30 at a distance that allows you to place the center of the windings 6, 26 and 27 of the maximum current relay 5 at the optimal distance to the contact centers of the movable COP 5.1 and 5.3, maximum current relay 5, to perform its functions and are interconnected by means of a dielectric material (Fig. 4).

 In FIG. 1 and 2 depict an electrical diagram of the proposed device for controlling a garage lift.

 A device containing a reverse magnetic starter 1 with actuators 2 of the "Up" motion and actuator 3 of the "Down" motion, overcurrent relay 4 with closing KS 4.1, overcurrent relay 5 with opening movable KS 5.1 and stationary KS 5.2 and winding 6, fuse 7, button 8 "Raise" and its NC contact 8.1, the button 9 "Lower" and its NC contact 9.1, a resistor 10, an electric lamp 11, a lower working limit switch 12, emergency upper limit switch 13 and a lower limit switch 14, while one of the conclusions of the power contacts 2.1 and 3.1 re The magnetic starter 1 is connected to the leads of the stator windings of the electric motor 15, the motor housing 15 20 is connected to the zero point 21 of the supply network, the device is equipped with a three-phase magnetic starter 22, a voltage relay 23, a single-phase switch 24, a start button 25 with an open contact 25.1 and a make contact 25.2, while the conclusions of the stator windings of the electric motor 16 20 are connected to one of the terminals of the power contacts 2.1 and 3.1 of the reverse magnetic starter 1, relay 4 of the maximum current with magnetically controlled contact 4.1, which th winding a number of turns ensuring unlocking 4.1 COP, when stopping the 1st e. engine maximum current relay 5 with magnetically controlled KS 5.1 and 5.3, which is equipped with a winding 26 and a winding 27, the length of the winding 26 is longer than the length of the winding 6, and the length of the winding 27 is less than the last, the centers of the windings 6, 26 and 27 coincide and are located behind the centers of the working sections of the movable contacts KS 5.1 and 5.3, but closer to the first one with the number of turns providing excellent sensitivity of the overcurrent relays 5, are placed on a coil 28, at one end of which there is a screw 29 perpendicular to its axis, between which and a sealed balloon 30 magnetically controlled contacts 5.1 and 5.3 there is a rubber gasket 31 to soften the stop of the screw 29 in the latter, when it is fixed in the coil 28 see FIG. 3, the conclusions are one and the third, and the other through the winding of the overcurrent relay 4 is connected to Lemmas 32, 33 and 34, which are also for connecting a three-phase supply network, the other conclusions are connected through the power contacts 22.1 of the magnetic starter 22 to other terminals of the power contacts 2.1 and 3.1 reverse magnetic starter 1, the terminals of the stator windings of electric motors 16 20 are connected to one of their terminals, connected in series: terminal 34, single-phase switch 24, fuse 7 connected to chains from connected in series: movable КС 5.3, to the contact is open with another contact of the stationary KS 5.2, one contact is open with the movable KS 5.1 of the maximum current relay 5, which are bridged by a series-disconnecting movable contact 23.1 and the fixed contact 23.2 of the voltage relay 23 and the Start button 25, starter coil 22, emergency the upper limit switch 13, which is bridged by the opening contact 2.2 of the actuator 2 "up" the lower limit switch 14, which is bridged by the opening contact 3.2 of the actuator 3 of "down", size poking contact 2.3 of the starter 2 of the “Up” movement, and contact 3.3 of the starter 3 of the “Down” movement, which are bridged by the block contact 22.2 of the starter 22, opening the fixed contact 23.3 and the moving contact 23.4 of the voltage relay 23, the zero point 21 of the mains, opening the moving contact 23.1 and fixed contact 23.2 of voltage relay 23, opening contact 25.1 of start button 25, coil of voltage relay 23 and fixed contact 23.5 of the latter, resistor 10, electric lamp 11 and non-movable contact 23.5 of voltage relay 23, through make contact core 4.1 of relay 4 the maximum current, which is shunted by the closing contact 25.2 of the Start button 25, the 8 Up button, the opening contact 9.1 of the 9 lower button, the upstream magnetic starter coil 2, and the connection point of one terminal block contact 22.2 of the starter 22 are connected , contact block 3.2 of starter 3, block contact 2.3 of starter 2, lower operating limit switch 12 and emergency limit switch 14, as well as NC 8.1 of button 8 "Lift", button 9 "Lower", magnetic coil of magnetic actuator 3 of the movement "Down "and another conclusion of the lower working of its limit switch 12, the findings of the fixed contact 23.6 are combined, one of the disconnecting contact 25.1 of the start button 25 of the stationary KS 5.5 closes the maximum current relay 5 closing with the movable KS 5.3, one coil of the voltage relay 23, the other terminal of which is connected to the terminal of the fixed KS 5.4 closing with mobile KS 5.1 relay 5 of the maximum current, magnetically controlled contacts 5.1 and 5.3, containing a sealed container 30, in which there is one stationary KS 5.2 with non-magnetic conductive material with two contacts and installed ends at the ends of a sealed container 30, movable KS 5.1 and 5.3, fixed KS 5.4 and 5.5 with ferromagnetic material, while a fixed KS 5.4 with a section with a reduced cross section 35 and a movable KS 5.1 with an anchor 36 are installed in one end of the sealed cylinder 30 so that the anchor 36 is located opposite the section with a reduced section 35, a fixed KS 5.5 with a section with a reduced section 37 and a movable KS 5.3 with an anchor 38 are installed in the second end of the sealed container 30 so that the anchor 38 is located opposite the section with a reduced section 37, the free ends of the stationary KS 5.4 and 5.5 are located inside the sealed container 30 at a distance that allows you to place the center of the windings 6, 26 and 27 of the maximum current relay 5 at the optimal distance to the centers of the moving contacts 5.1 and 5.3 of the maximum current relay 5, for the latter to perform its functions and are connected between by means of a dielectric material (FIG. 4).

 Preparation and operation of the device.

 When the single-phase switch 24 is off, in the mains supply of the electric motor 15, we disconnect one line. We turn on the switch 24 and a current will flow through the coil of the magnetic starter 22, it trips, closes the power contacts 22.1 in the common supply network of electric motors 15 20 and the voltage of the latter goes to the other terminals of the power contacts 2.1 and 3.1 of the reverse magnetic starter 1.

 On the control panel, simultaneously press button 8 "Lift", with which we open contact 8.1 in the power supply circuit of the starter coil 3 of the "Down" motion and on button 25 "Start", with which we open contact 25.1 in the power supply circuit of the coil of voltage relay 23 to lock it for a while the inrush current of the electric motors 15 20, contact 25.2 bypass the closing KS 4.1 relay 4 maximum current. Inrush current will flow in the winding of the relay 4 of the maximum current, it will operate and the КС 4.1 will close, similarly in the windings 6, 26 and 27, the relay 5 of the maximum current, which will work, will open the movable КС 5.1 and the stationary КС 5.2, but the starter 22 will remain operational due to the parallel connection of the Start button 25 to the movable KS 5.1 and 5.3, it closes with a stationary KS 5.4 in the power supply circuit of the electric lamp 11, which lights up, signals the working state of the KS 5.1, 5.4 contacts and the decay time of the starting current of the electric motors 15 20. The light disappears electric bulbs 1 1 occurs when the mobile CS 5.1 returns to its original state due to a lack of a 1.3-fold increase in current from the operating current caused by disconnection of one line of the power supply network of the electric motor 15, it is necessary to immediately release the "Start" button and the 8 "Rise" button, and rebuild overcurrent relay 5.

 With the switch 24 off, we shift the sealed container 30 in the coil 28 to reduce the distance between the center of the windings 6, 26, 27 of the overcurrent relay 5 and the contact centers of the movable KS 5.1 and 5.3, in which false shutdowns of the electric motors 15 20 at the time of start-up and ensuring the lift stops during overload due to phase failure, mechanical locking, short circuit after a drop in the starting current of electric motors 15 20. The sealed cylinder 30 must be secured with a screw 29, with the switch 24 turned off, connecting m line disconnected the mains motor 15, turn on the switch 24 and the device is ready for use.

 At the lowest position of the carriages all the way into the shoe, the car is driven onto the lift.

 In this case, we turn the pick-up beams under the bus and set their centers of support platforms under the centers of support platforms of the base of the body. On the elevator remote control, simultaneously press the “Start” button 25 and the “Up” button 8. After the inrush current of the electric motors 15 20 decreases and the light of the electric lamp 11 disappears, we release the first one and hold the other to reduce the distance to 100 mm between the closest platforms of the supports of the pickup beams and the body supports. Then we go around the lift and precisely install the latter, lift again, but this time to a height of 300,400 mm, after that we go around it again and make sure the bus is correctly positioned on the pickups, i.e. one more time we make a bypass of the lift in comparison with the existing device, after which we continue to lift it to the desired height. The upper limit is carried out using the emergency upper limit switch 13.

 To turn the lift on to the “Down” stroke, on the control panel, simultaneously press the “Start” button 25, which we release after the light of the electric lamp 11 disappears and the “Lowering” button 9, which we block with the opening contact 9.1 from the supply voltage to the upward motion coil ", while the voltage of the supply network is the coil of the starter 3 of the movement" Down ", which is triggered and power contacts 3.1 closes the power supply circuit of the electric motors 15 20, the lift is switched on the course" Down ". We hold the “Lowering” button 9 until the elevator automatically stops by the lower working limit switch 12, which on the first rack near the control panel opens the starter coil 3 power circuit.

 In case of sticking of power contacts 3.1 of starter 3 or contact of the lower working limit switch 12, the rack carriages will move “Down” for some more time and the lift will stop automatically using the emergency lower limit switch 14, which also on the first rack of the lift opens the power supply circuit of the starter coil 29, and by power contacts 22.1 it opens the general power supply circuit of electric motors 15 20. The elevator can be switched on again after eliminating the emergency mode.

The device provides protection for the lines of the supply network, power contacts 2.1 and 3.1 of the reverse magnetic starter 1, power contacts 22.1 of the starter 22 from short circuit, and electric motors 15 20 against overload due to phase failure, mechanical locking, and it also provides for a stop of the lift without delay when stopping any with electric motors 15
20. In this case, the operating current in the winding of the relay 4 maximum current will decrease by 7 A, the relay 4 maximum current returns to its original state and opens KS 4.1 in the power supply circuit of the coils of the starter 2 or starter 3.

 A short circuit can occur at the moment of starting the electric motors 15 - 20, for example, in the lines of the windings 26 and 27 of the overcurrent relay 5, it will flow through the last short circuit current and the overcurrent relay 5 will open, open the movable CS 5.1 with the stationary CS 5.4. It opens the movable KS 5.3 with a motionless KS 5.2 and closes with a motionless KS 5.5.

 Moreover, in a chain connected in series: terminal 34, single-phase switch 24, fuse 7, movable KS 5.3, closed with a fixed KS 5.5, a relay coil 23 voltage, closed stationary KS 5.4 and movable KS 5.1, starter coil 22, emergency upper limit switch 13 shunted by the opening contact 2.2 of the upward actuator 2, the lower limit switch 14 bypassed by the opening contact 3.2 of the downward actuator 3, opening contact 2.3 and opening contact 3.3 are bridged by closing contact 2 2.2 of the starter 22, opening the fixed contact 23.3 and the moving contact 23.4 of the voltage relay 23, and the zero point 21 of the supply network will flow current, which is not enough to keep the starter 22 in operation, the voltage relay 23 is activated, opens the movable contact 23.1 with the fixed contact 23.2 excluding the supply voltage to the zero point 21 of the last through the Start button and closed КС 5.1 and 5.4, the closure of the movable contact 23.4 with the fixed contact 23.5 blocks the restart of the starter 22, the movable contact 23.1 closes It comes with a fixed contact 23.6 and blocks the disconnection of its coil from the supply voltage. In this case, the electric lamp 11 will light up and signal emergency mode-short circuit.

 Similar switching will occur during a phase short circuit, for example, in the lines of the zero point 21 of the supply network and the line in which the coil of relay 4 of maximum current and coil 6 of relay 5 of maximum current.

 If a short circuit is similar to the first and second case, as well as the overload of anyone with an electric motor 15 20 due to a break in the phase of mechanical locking occurs after the inrush current of the electric motors 15 20 drops, then in the windings 6, 26 and 26 of the relay 5 of the maximum current and the coil of the relay 4 of the maximum current with the remaining phases, the current will flow 1.3 times more from the operating one and the maximum current relay 5 is activated, opens the movable KS 5.1 with the stationary KS 5.2 and the starter 22 returns to its original state, closes with the stationary KS 5.4 and the chain is connected in series: terminal 34, switch 24, fuse 7, opening movable contact 23.1 and fixed contact 23.2, opening contact 25.1 of start 25 button, voltage relay coil 23, closed КС 5.4 and 5.1, starter coil 22, emergency upper limit switch 13, which is shunted by the opening contact 2.2 of the starter 2 and the lower limit switch 14, which is shunted by the opening contact of the starter 3, the opening contact 2.3 of the starter 2 and the opening contact 3.3 of the starter 3 are shunted by the block contact 22.2 of the starter 22, ra short-circuit fixed contact 23.3 and movable contact 23.4, the zero point 21 of the supply network will flow current and the voltage relay 23 is activated, all switching produces the same way as the first and second cases.

 The elevator cannot be turned on in all cases until the emergency operation of the circuit breaker 24 is cleared after the voltage relay 23 returns to its original state. The device is now ready to control the garage lift.

Thus, the advantages of the proposed device over the existing are:
increased operational safety:
stop the lift without delay when stopping any electric motor;
automatic stop of the lift when the power contacts stick: the "Up" actuator and the "Down"actuator;
the impossibility of turning on the lift after sticking the power contacts of the up-motion actuator or the down-motion actuator until it is eliminated;
increase of technical reliability:
simple design and a small number of contact joints;
high-speed protection against short circuit, phase failure, overload (using a maximum current relay on magnetically controlled contacts);
monitoring the suitability of the contacts of one moving and other fixed contact cores of another overcurrent relay;
motor protection in the event of a break in any phase of the supply voltage;
the impossibility of simultaneously activating the "Up" and "Down" motion actuators while simultaneously pressing the "Raise" and "Lower"buttons;
increased efficiency due to non-use:
circuit breaker, six reverse magnetic starters, twelve maximum current relays, two time relays, three voltage relays, fifteen limit switches, six push-button stations, several terminal blocks, a large number of meters: 0.5 inch pipes, electric wire and sheet metal to the remote control case control, a network of electric lamps with fittings for their fastening and a resistor, as well as a large amount of time that is spent in assembling all (of the above) elements of the existing lift.

Claims (2)

 1. A device for controlling a garage elevator, comprising a reversible magnetic starter with power contacts and Up and Down magnetic actuators, the first overcurrent relay with a closing contact, the second overcurrent relay with an opening movable and fixed contacts, fuse, buttons Raise "and" Lowering "with NC contact, voltage relay, resistor, light bulb, working lower limit switch, emergency lower and upper limit switches and lift motors, conclusions the toroidal windings of which are connected to the terminals of the power contacts of the reversing magnetic starter, and the cases with a zero point of the supply network, characterized in that it is equipped with a three-phase magnetic starter, a single-phase switch, a "Start" button with opening and closing contacts, while the closing contact of the first maximum relay the current is magnetically controlled, and the coil of its coil is made with a number of turns, providing the opening of the magnetically controlled contact when one of the motors stops, the center of the winding p is located opposite the working section of the magnetically controlled contact, the second overcurrent relay is equipped with a second and third windings, a second movable contact, a second and third fixed contacts, and all contacts are magnetically controlled and placed in a sealed container located inside the coil, the length of each subsequent coil is longer than the previous one, and the centers of all windings coincide and are located behind the centers of the working sections of the first and second magnetically controlled movable contacts, but closer to the first with the number of turns For example, a screw is mounted on one end of the coil perpendicular to its axis, and a rubber gasket is installed between it and the sealed cylinder, the first and third inputs of the second overcurrent relay are directly connected, and the second input is connected through the winding of the first overcurrent relay to the terminals of the three-phase supply network, the terminals of the second overcurrent relay are connected to the terminals of the three-phase supply network, the outputs of the second overcurrent relay are connected to the terminals of the power con acts of a reversing magnetic starter through the power contacts of a three-phase magnetic starter, one of the terminals of a three-phase supply network through a series-connected single-phase switch and a fuse is connected to chains of series-connected second movable opening magnetically controlled contact, first fixed magnetically controlled contact and first movable magnetically controlled contact of the second overcurrent relay, shunted connected in series by opening movable and the fixed contacts of the voltage relay and the "Start" button, the coils of the three-phase magnetic starter, emergency upper and lower limit switches, shunted respectively by the first NC contacts of the magnetic actuators "Up" and "Down", the second NC contacts of which are shunted by the block contact of the three-phase magnetic starter disconnecting the fixed and movable contacts of the voltage relay and the zero point of the supply network, from series-connected closing magnetically controlled contact first the first overcurrent relay shunted by the make contact of the Start button, the Lift button, the make contact of the Lower button, the coil of the up magnetic actuator, the input contact block of the three-phase magnetic actuator and the output of the lower working limit switch, the input of which through connected in series to the coil of the magnetic actuator "Down", the "Lower" button, the opening contact of the "Rise" button is connected to the output of the magnetically controlled contact of the first overcurrent relay, from the second about the movable and second fixed contacts of the voltage relay, the opening contact of the "Start" button, the voltage relay coils shunted in series with the resistor and the lamp, the third fixed contact closing with the first movable contact of the voltage relay, and the output of the opening contact of the "Start" button, the inputs of the third closing fixed contact with the second movable contact of the second overcurrent relay, fourth stationary contact closing with the second movable contact of the relay Nia and relay coil voltages are combined, and the output voltage relay coil through a second fixed closing contact is connected to a first terminal of the second magnetically movable overcurrent relay.  2. The device according to claim 1, characterized in that the first stationary magnetically controlled contact of the second overcurrent relay is made of non-magnetic material, the first and second movable, the second and third stationary magnetically controlled contacts are made of ferromagnetic material, the second fixed contact and the first movable contact installed in one end of the sealed container, a third fixed contact and a second movable contact are installed in the second end of the sealed container, while the movable the contacts have anchors, and the fixed sections of a reduced cross section opposite which the anchors are placed, the free ends of the second and third fixed contacts are located inside the sealed container at a distance that allows the center of the windings of the second overcurrent relay to be placed at the optimal distance to the first and second movable contacts, and connected between yourself with a dielectric.

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