CN212079166U - Door rolling machine capable of phase-staggered protection - Google Patents

Abstract

The door rolling machine capable of carrying out phase-dislocation protection comprises a gearbox, a three-phase motor, a brake device, an electric cabinet and an operation circuit; the gearbox, the three-phase motor and the brake device are sequentially connected, and the brake device is provided with a brake electromagnetic coil; the running circuit comprises a main circuit, an electromagnetic brake circuit and a control circuit; the main circuit comprises a three-phase four-wire system three-phase power supply, a circuit breaker, an uplink contactor main contact and a three-phase motor which are sequentially connected in series, wherein the main contact of the downlink contactor and the main contact of the uplink contactor are arranged in parallel; two normally closed open contacts of an upper limit fire breaking limiter and two normally closed open contacts of a lower limit fire breaking limiter are connected in series between two output ends of the main contacts of the uplink contactor and two input ends of the three-phase motor. The utility model discloses when three phase current takes place the mistake phase, enable three-phase rolling door machine automatic shutdown operation, prevent to damage the rolling slats door.

Description

Door rolling machine capable of phase-staggered protection

Technical Field

The utility model relates to a rolling slats door technical field especially relates to the rolling slats door machine that can carry out the phase dislocation protection.

Background

Electric rolling doors are widely used in storefronts, garages, markets and other places, a large-scale electric rolling door is lifted and lowered by a three-phase rolling door machine through a transmission mechanism to drive a winding drum arranged above a door opening to rotate, and the winding drum drives a door curtain wound on the winding drum to slide up and down along guide rails arranged on two sides of the door opening to open and close the door. The three-phase door roller generally comprises a gear box, a three-phase motor and a brake device, wherein the brake device is provided with a brake electromagnetic coil. The rolling door will stop automatically at the preset position when opening and closing the door, the function is completed by the limit device which is arranged at the side of the three-phase rolling door machine and is connected with the three-phase rolling door machine in a transmission way, and the limit device is internally provided with an upper limit travel switch and a lower limit travel switch which are connected with the control circuit in series. The opening and closing and the automatic stopping of the roller shutter door are controlled by a set of running circuit.

Fig. 3 is a circuit diagram of an operation circuit of a conventional three-phase door roller, in which an upper limit travel switch SQ1 and a lower limit travel switch SQ2 of a stopper are generally connected in series to an ascending control circuit and a descending control circuit, and the upper limit travel switch SQ1 and the lower limit travel switch SQ2 can automatically stop a curtain at a preset position when the curtain ascends or descends. In the circuit, after the roller shutter door is closed in place and automatically stops, the upward button can be pressed to enable the three-phase motor M to rotate forward to open the roller shutter door; after the roller shutter door is opened in place and automatically stopped, the downward button can be pressed to enable the three-phase motor M to rotate reversely to close the roller shutter door.

When natural disasters such as typhoon, storms, flood occur, the phenomenon that the wire pole is blown down, the electric wire is blown off can often take place, when salvageing the power supply, can connect the line order of three-phase electricity wrong sometimes, causes the wrong phase. According to the principle of a three-phase motor, after two phases of three-phase electricity are in a phase error, the three-phase electricity can be reversed, for the electric rolling door, the rolling door needs to be closed by pressing a down button, and the rolling door rises as a result, if the electric rolling door does not stop in time, the rolling door can be damaged by rolling back, and similarly, the rolling door needs to be opened by pressing an up button, and the rolling door needs to be closed as a result, so that the rolling door is accumulated at the bottom of a guide rail and damaged. The conventional circuit shown in fig. 3 cannot perform phase-dislocation protection, and therefore, a large-sized roller shutter door driven by a three-phase roller shutter door needs to be designed with a structure and a circuit capable of performing phase-dislocation protection.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art's is not enough, provides a rolling door machine that can carry out wrong looks protection, when three phase current took place the mistake looks, enabled three-phase rolling door machine automatic shutdown, prevented to damage the rolling slats door.

The utility model discloses a realize through following technical scheme: the door rolling machine capable of carrying out phase-dislocation protection comprises a gearbox, a three-phase motor, a brake device, an electric cabinet and an operation circuit; the gearbox, the three-phase motor and the brake device are sequentially connected, and the brake device is provided with a brake electromagnetic coil; the running circuit comprises a main circuit, an electromagnetic brake circuit and a control circuit; the main circuit comprises a three-phase four-wire system three-phase power supply, a circuit breaker, an uplink contactor main contact and a three-phase motor which are sequentially connected in series, wherein the main contact of the downlink contactor and the main contact of the uplink contactor are arranged in parallel; two normally closed open contacts of an upper limit fire breaking limiter and two normally closed open contacts of a lower limit fire breaking limiter are connected in series between two output ends of the main contacts of the uplink contactor and two input ends of the three-phase motor.

Preferably, the front end of the gearbox is provided with a mounting seat.

Preferably, three input ends of the circuit breaker are respectively connected with an A phase, a B phase and a C phase of a three-phase power supply; the ascending contactor is used for controlling the three-phase motor to rotate forwards to open the door, the input ends of three main contacts of the ascending contactor are respectively connected with three output ends of the breaker, and the output ends of the three main contacts are respectively connected with three input ends of the three-phase motor; the descending contactor is used for controlling the three-phase motor to reversely close the door, the input ends of three main contacts of the descending contactor are respectively connected with three output ends of the circuit breaker, and the output ends of the A phase, the B phase and the C phase of the main contacts of the descending contactor are respectively connected with the output ends of the C phase, the B phase and the A phase of the ascending contactor.

Preferably, the electromagnetic braking circuit comprises a single-phase rectifier bridge and a braking electromagnetic coil; two input ends of the single-phase rectifier bridge are respectively connected with a zero line of a three-phase power supply and one output end of a main contact of the uplink contactor, and two ends of the brake electromagnetic coil are respectively connected with two output ends of the single-phase rectifier bridge.

Preferably, the control circuit comprises an uplink control circuit and a downlink control circuit; the uplink control circuit comprises a zero line of a three-phase power supply, a normally open uplink button, a normally closed second auxiliary contact of a downlink contactor, an uplink contactor coil, a normally closed stop button and a C phase of an output end of the circuit breaker which are connected in series; two ends of the normally open uplink button are connected with a normally open third auxiliary contact of the uplink contactor in parallel; the downlink control circuit comprises a zero line of a three-phase power supply, a normally open downlink button, a normally closed second auxiliary contact of the uplink contactor, a downlink contactor coil, a normally closed stop button and a C phase of the output end of the circuit breaker which are connected in series; and the two ends of the normally open downlink button are connected with a normally open third auxiliary contact of the downlink contactor in parallel.

Preferably, a limiter is arranged on the side edge of the gearbox and is in transmission connection with the gearbox; the limiter is provided with a normally closed upper limit travel switch and a normally closed lower limit travel switch; the normally closed upper limit travel switch is connected in series in the uplink control circuit, and the normally closed lower limit travel switch is connected in series in the downlink control circuit. The limit stopper is arranged to automatically stop the door curtain at a preset position when the door curtain moves upwards or downwards, when the normally closed upper limit travel switch or the normally closed lower limit travel switch acts, the normally closed contact is disconnected, the coil of the ascending contactor or the descending contactor loses power to cut off the main circuit, the three-phase motor stops rotating, and the brake electromagnetic coil loses power to brake the three-phase door rolling machine, so that the door curtain is stopped at a preset position.

Preferably, the circuit breaker, the uplink contactor, the downlink contactor and the single-phase rectifier bridge are all arranged in the electric cabinet, and the normally open uplink button, the normally open downlink button and the normally closed stop button are all arranged outside the electric cabinet shell.

The utility model has the advantages that: when the three-phase power supply is out of phase and the down button is pressed to open the rolling door and the rolling door is down, the rolling door curtain moves down to the lower limit fire breaking limiter to make the two normally closed contacts break the main circuit, the three-phase motor stops running and brakes the three-phase rolling door machine, so that the rolling door curtain stops moving upwards or downwards and is prevented from being damaged.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a circuit diagram of the present invention.

Fig. 3 is a circuit diagram illustrating an operation of a conventional three-phase door roller.

In FIGS. 1-2: the device comprises a gearbox 1, a brake device 2, an electric cabinet 3, a mounting seat 4, a limiter 5, a breaker QF, an ascending contactor KM1, a descending contactor KM2, an upper limit fire breaking limiter TK1, a lower limit fire breaking limiter TK2, a three-phase motor M, a normally open ascending button SB1, a normally open descending button SB2, a normally closed stop button SB3, a zero line N, a single-phase rectifier bridge UR, a brake electromagnetic coil YA, a normally closed upper limit travel switch SQ1 and a normally closed lower limit travel switch SQ 2.

Detailed Description

As shown in fig. 1-2, the embodiment of the present invention provides a door roller capable of phase-staggered protection, which includes a transmission case 1, a three-phase motor M, a brake device 2, an electric cabinet 3 and an operating circuit; the gearbox 1, the three-phase motor M and the brake device 2 are sequentially connected, and the brake device 2 is provided with a brake electromagnetic coil YA; the running circuit comprises a main circuit, an electromagnetic brake circuit and a control circuit; the main circuit comprises a three-phase power supply, a breaker QF, an uplink contactor main contact KM1-1 and a three-phase motor M which are connected in sequence, wherein the main contact KM2-1 of the downlink contactor KM2 is connected with the uplink contactor main contact KM1-1 in parallel; two normally closed open contacts TK1 of an upper limit fire breaking limiter TK1 and two normally closed open contacts TK2 of a lower limit fire breaking limiter TK2 are connected in series between two output ends of the main contact KM1-1 of the uplink contactor and two input ends of the three-phase motor M.

In this embodiment, the front end of the transmission case 1 is provided with a mounting seat 4.

In this embodiment, three input terminals of the breaker QF are respectively connected to the a phase, the B phase and the C phase of the three-phase power supply; the ascending contactor KM1 is used for controlling a three-phase motor M to rotate forwards to open a door, and the input ends of three main contacts KM1-1 of the ascending contactor KM1 are respectively connected with three output ends of a breaker QF; the down contactor KM2 is used for controlling a three-phase motor M to reversely close a door, the input ends of three main contacts KM2-1 of the down contactor KM2 are respectively connected with three output ends of a breaker QF, and the output ends of the phase A, the phase B and the phase C of the main contacts KM2-1 of the down contactor KM are respectively connected with the output ends of the phase C, the phase B and the phase A of the up contactor KM 1.

In this embodiment, the electromagnetic brake circuit includes a single-phase rectifier bridge UR and a brake electromagnetic coil YA; two input ends of the single-phase rectifier bridge UR are respectively connected with a zero line N of a three-phase power supply and one output end of a main contact KM1-1 of an uplink contactor KM1, and two ends of the brake electromagnetic coil YA are respectively connected with two output ends of the single-phase rectifier bridge UR.

In this embodiment, the control circuit includes an uplink control circuit and a downlink control circuit; the uplink control circuit comprises a zero line N of a three-phase power supply, a normally open uplink button SB1, a normally closed second auxiliary contact KM2-2 of a downlink contactor KM2, an uplink contactor KM1 coil, a normally closed stop button SB3 and a C phase of a breaker QF output end which are connected in series; two ends of the normally open uplink button SB1 are connected in parallel with a normally open third auxiliary contact KM1-3 of an uplink contactor KM 1; the downlink control circuit comprises a zero line N of a three-phase power supply, a normally open downlink button SB2, a normally closed second auxiliary contact KM1-2 of an uplink contactor KM1, a downlink contactor KM2 coil, a normally closed stop button SB3 and a C phase of a breaker QF output end which are connected in series; and the two ends of the normally open downlink button SB2 are connected in parallel with a normally open third auxiliary contact KM2-3 of a downlink contactor KM 2.

In this embodiment, a stopper 5 is arranged on the side of the gearbox 1, and the stopper 5 is in transmission connection with the gearbox 1; the limiter 5 is provided with a normally closed upper limit travel switch SQ1 and a normally closed lower limit travel switch SQ 2; the normally closed upper limit travel switch SQ1 is connected in series in the uplink control circuit, and the normally closed lower limit travel switch SQ2 is connected in series in the downlink control circuit. The normally closed upper limit travel switch SQ1 and the normally closed lower limit travel switch SQ2 are arranged for enabling the door curtain to automatically stop at a preset position when ascending or descending, when the normally closed upper limit travel switch SQ1 or the normally closed lower limit travel switch SQ2 acts, a normally closed contact is disconnected, an ascending control circuit or a descending control circuit is cut off, an ascending contactor KM1 or a descending contactor KM2 cuts off a main circuit, the three-phase motor M stops rotating, the brake electromagnetic coil YA is also powered off, the brake device 2 brakes the three-phase door rolling machine, and the door curtain stops at a preset position.

In this embodiment, the breaker QF, the up contactor KM1, the down contactor KM2 and the single-phase rectifier bridge UR are all disposed in the electric cabinet 3, and the normally open up button SB1, the normally open down button SB2 and the normally closed stop button SB3 are all disposed outside the casing of the electric cabinet 3.

The electric elements involved in the present embodiment are all commonly available electric elements.

The working principle is as follows: when the roller shutter door is to be opened, the breaker QF is closed, the normally open uplink button SB1 is pressed, the uplink control circuit is connected, the uplink contactor KM1 is electrified and closed, the main contact KM1-1 is closed, the electromagnetic brake circuit is connected, the brake electromagnetic coil YA obtains direct current rectified by the single-phase rectifier bridge UR, and electromagnetic force is generated to enable the brake device 2 to open the brake; meanwhile, the main circuit is switched on, the three-phase motor M is electrified and rotates forward to start and operate to drive the three-phase door rolling machine to work, and the three-phase door rolling machine drives the roller door to open; after the uplink contactor KM1 is electrified and attracted, the normally open third auxiliary contact KM1-3 is closed to carry out parallel self-locking on the normally open uplink button SB1, the normally closed second auxiliary contact KM1-2 is opened to cut off the downlink control circuit, and the downlink control circuit is protected, and at the moment, even if the normally open downlink button SB2 is pressed, the coil of the downlink contactor KM2 cannot be electrified to act; when the door curtain is stopped to go upwards, a normally closed stop button SB3 is pressed down, the ascending control circuit is cut off, the ascending contactor KM1 loses power, the main contact KM1-1 is disconnected, the main circuit loses power, the three-phase motor M loses power and stops running, the electromagnetic brake circuit loses power at the same time, the brake electromagnetic coil YA loses power, and the brake device 2 brakes the three-phase door rolling machine to stop the door curtain at a preset position.

Similarly, when the roller shutter door is closed, the breaker QF is closed, the normally open downlink button SB2 is pressed, the downlink control circuit is switched on, the downlink contactor KM2 is electrified and closed, the main contact KM2-1 is closed, the electromagnetic brake circuit is switched on, the brake electromagnetic coil YA obtains direct current rectified by the single-phase rectifier bridge UR, and electromagnetic force is generated to enable the brake device 2 to open the brake; meanwhile, the main circuit is switched on, the three-phase motor M is powered on and reversely rotated to start and operate, the three-phase door roller is driven to work, and the three-phase door roller drives the roller shutter door to close; after the downlink contactor KM2 is electrified and attracted, the normally open third auxiliary contact KM2-3 is closed to carry out parallel self-locking on the normally open downlink button SB2, and the normally closed second auxiliary contact KM2-2 is opened to cut off the uplink control circuit to protect the uplink control circuit; when the door curtain is stopped to descend, a normally closed stop button SB3 is pressed to cut off a descending control circuit, a descending contactor KM2 loses power, a main contact KM2-1 is disconnected, the main circuit loses power, a three-phase motor M loses power to stop running, an electromagnetic brake circuit loses power at the same time, a brake electromagnetic coil YA loses power, and a brake device 2 brakes the three-phase door rolling machine to stop the door curtain at a preset position.

Phase error protection: when a three-phase power supply is in a phase error state, the roller shutter door is closed in an opening state, a normally closed descending button SB2 is pressed, due to the phase error, the roller shutter door curtain of the roller shutter door is not closed downwards but is opened upwards, the roller shutter door curtain ascends to touch an upper limit fire-breaking limiter TK1, two normally closed contacts TK1 of the roller shutter door curtain are disconnected to cut off a main circuit, a three-phase motor M stops running and brakes the three-phase roller shutter door machine, the roller shutter door curtain stops ascending, and the roller shutter door curtain is prevented from being damaged; similarly, when a phase error occurs, the rolling door is opened in a closed state, the normally closed ascending button SB1 is pressed, the door curtain does not ascend and is closed downwards due to the phase error, the door curtain descends and touches the lower limit fire-breaking limiter TK2, two normally closed contacts TK2 of the door curtain are disconnected to cut off a main circuit, the three-phase motor M stops running and brakes the three-phase rolling door machine, the door curtain stops descending, and the door curtain is prevented from being damaged.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the creative work should be covered within the scope of the present invention.

Claims (7)

1. The door rolling machine capable of carrying out phase-dislocation protection comprises a gearbox, a three-phase motor, a brake device, an electric cabinet and an operation circuit; the gearbox, the three-phase motor and the brake device are sequentially connected, and the brake device is provided with a brake electromagnetic coil; the running circuit comprises a main circuit, an electromagnetic brake circuit and a control circuit; the main circuit comprises a three-phase four-wire system three-phase power supply, a circuit breaker, an uplink contactor main contact and a three-phase motor which are sequentially connected in series, wherein the main contact of the downlink contactor and the main contact of the uplink contactor are arranged in parallel; the method is characterized in that:

two normally closed open contacts of an upper limit fire breaking limiter and two normally closed open contacts of a lower limit fire breaking limiter are connected in series between two output ends of the main contacts of the uplink contactor and two input ends of the three-phase motor.

2. A door roller with phase error protection as claimed in claim 1, wherein: the front end of the gearbox is provided with a mounting seat.

3. A door roller with phase error protection as claimed in claim 1, wherein: three input ends of the circuit breaker are respectively connected with an A phase, a B phase and a C phase of a three-phase power supply; the ascending contactor is used for controlling the three-phase motor to rotate forwards to open the door, the input ends of three main contacts of the ascending contactor are respectively connected with three output ends of the breaker, and the output ends of the three main contacts are respectively connected with three input ends of the three-phase motor; the descending contactor is used for controlling the three-phase motor to reversely close the door, the input ends of three main contacts of the descending contactor are respectively connected with three output ends of the circuit breaker, and the output ends of the A phase, the B phase and the C phase of the main contacts of the descending contactor are respectively connected with the output ends of the C phase, the B phase and the A phase of the ascending contactor.

4. A door roller with phase error protection as claimed in claim 1, wherein: the electromagnetic brake circuit comprises a single-phase rectifier bridge and a brake electromagnetic coil; two input ends of the single-phase rectifier bridge are respectively connected with a zero line of a three-phase power supply and one output end of a main contact of the uplink contactor, and two ends of the brake electromagnetic coil are respectively connected with two output ends of the single-phase rectifier bridge.

5. A door roller with phase error protection as claimed in claim 1, wherein: the control circuit comprises an uplink control circuit and a downlink control circuit; the uplink control circuit comprises a zero line of a three-phase power supply, a normally open uplink button, a normally closed second auxiliary contact of a downlink contactor, an uplink contactor coil, a normally closed stop button and a C phase of an output end of the circuit breaker which are connected in series; two ends of the normally open uplink button are connected with a normally open third auxiliary contact of the uplink contactor in parallel; the downlink control circuit comprises a zero line of a three-phase power supply, a normally open downlink button, a normally closed second auxiliary contact of the uplink contactor, a downlink contactor coil, a normally closed stop button and a C phase of the output end of the circuit breaker which are connected in series; and the two ends of the normally open downlink button are connected with a normally open third auxiliary contact of the downlink contactor in parallel.

6. A door roller with phase error protection as claimed in claim 5, wherein: a limiter is arranged on the side edge of the gearbox and is in transmission connection with the gearbox; the limiter is provided with a normally closed upper limit travel switch and a normally closed lower limit travel switch; the normally closed upper limit travel switch is connected in series in the uplink control circuit, and the normally closed lower limit travel switch is connected in series in the downlink control circuit.

7. A door roller with phase error protection as claimed in claim 1, wherein: the circuit breaker, the ascending contactor, the descending contactor and the single-phase rectifier bridge are all arranged in the electric cabinet, and the normally-open ascending button, the normally-open descending button and the normally-closed stop button are all arranged outside the electric cabinet shell.

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