CN211086982U

CN211086982U - Lifting unit cooperative work system

Info

Publication number: CN211086982U
Application number: CN201922319344.XU
Authority: CN
Inventors: 周治汉; 林华; 吴启锋; 岑汝吉
Original assignee: Associated Engineers Zhuhai Sez Ltd
Current assignee: Associated Engineers Zhuhai Sez Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-07-24
Anticipated expiration: 2029-12-23

Abstract

The utility model aims at providing an automatic balanced lift unit collaborative work system of regulation the utility model discloses a control module and a plurality of three phase machine, it is a plurality of all be provided with proximity switch on the three phase machine, proximity switch with three phase machine's output shaft cooperation, control module includes P L C controller, and is a plurality of proximity switch all with the signal end one-to-one of P L C controller is connected, and is a plurality of three phase machine all with P L C controller electric connection, P L C controller control is all three phase machine's positive and negative rotation and control are single three phase machine's independent opening stops the utility model discloses be applied to motor control system's technical field.

Description

Lifting unit cooperative work system

Technical Field

The utility model discloses be applied to motor control system's technical field, in particular to lift unit collaborative work system.

Background

Because the volume of aircraft is great, need large-scale maintenance platform to maintain when maintaining, the height dimension of the aircraft of different models is not the same, for this reason needs elevating system to carry out the lift action of platform, and elevating system is mostly motor and lead screw drive assembly to constitute, because the whole size of maintenance platform is great, the distance between every lead screw is too far and the position is restricted, and elevating system is not convenient for adopt the transmission shaft linkage. In order to ensure that the platform is stably lifted and does not incline, the lifting of each screw rod needs to be synchronous.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide an automatic balanced lift unit collaborative work system of regulation.

The utility model adopts the technical scheme that the utility model discloses a control module and a plurality of three phase machine, it is a plurality of all be provided with proximity switch on the three phase machine, proximity switch with three phase machine's output shaft cooperation, control module includes P L C controller, and is a plurality of proximity switch all with the signal end one-to-one of P L C controller is connected, and is a plurality of three phase machine all with P L C controller electric connection, P L C controller control is all three phase machine's positive and negative rotation and control are single three phase machine's independent opening stops.

According to the scheme, the proximity switch is matched with the output shaft of the three-phase motor to detect the rotation times of the output shaft of the three-phase motor, the proximity switch is connected with the signal end of the P L C controller to feed back a pulse signal to the P L C controller, a counter in the P L C controller counts, the counting of the three-phase motor with high count is stopped when the rotation times of the three-phase motors are different, and the three-phase motor is restarted after the rotation times are close.

One preferred scheme is, the utility model discloses still include motor power module, motor power module includes positive reverse circuit and a plurality of ac contactor, and is a plurality of first ac contactor all with positive reverse circuit connection, it is a plurality of three phase machine's power end corresponds and a plurality of first ac contactor's three normally open switch is connected, and is a plurality of first ac contactor's coil all with the current control port one-to-one of P L C controller is connected.

According to the scheme, the motor power supply module is used for supplying power to the three-phase motors and is matched with the P L C controller to cut off power and stop running, the forward and reverse rotation circuit is used for controlling forward and reverse rotation of the three-phase motors, simultaneous forward rotation or simultaneous reverse rotation of all the three-phase motors is achieved through the design that the first alternating current contactors and the forward and reverse rotation circuit are arranged, the current on-off of the coil of the first alternating current contactor is controlled through the P L C controller, the on-off of the normally open switch of the first alternating current contactor is further controlled, and switching of power supply and power off of the three-phase motors is further achieved.

The motor power supply module further comprises a first low-voltage switch and a plurality of thermal relays, wherein the input end of the first low-voltage switch is connected with an external three-phase power, the forward and reverse rotation circuit is connected with the output end of the first low-voltage switch, and the thermal relays are correspondingly connected in series between the three-phase motor and the first alternating current contactor.

According to the scheme, the first low-voltage switch is a master switch for switching on and off all the three-phase motors, and the thermal relay is used for overload protection of a single three-phase motor.

One preferred scheme is, positive and negative circuit includes parallel connection's third ac contactor and fourth ac contactor, third ac contactor with the output of first low-voltage switch is established ties, the first phase of input of fourth ac contactor with the third phase connection of input of third ac contactor, the third phase of input of fourth ac contactor with the first phase connection of input of third ac contactor, a current control port of P L C controller, the normally closed switch of third ac contactor and the coil of fourth ac contactor establish ties in proper order, a current control port of P L C controller, the normally closed switch of fourth ac contactor and the coil of third ac contactor establish ties in proper order.

According to the scheme, the first phase and the third phase of the fourth alternating current contactor are reversely connected to the input circuit, so that the motor is reversely rotated. And the normally closed switch of the third alternating current contactor is connected with the coil of the fourth alternating current contactor in series, and the normally closed switch of the fourth alternating current contactor is connected with the coil of the third alternating current contactor, so that the reverse rotation circuit is automatically disconnected when the forward rotation circuit is connected.

Preferably, a trigger piece matched with the proximity switch is arranged on an output shaft of the three-phase motor.

According to the scheme, the proximity switch is triggered by the trigger piece, so that the proximity switch is triggered once by the trigger piece when the output shaft rotates for one circle, and the proximity switch feeds back a pulse signal to the P L C controller for counting.

Preferably, the control module further comprises a touch screen electrically connected with the P L C controller.

According to the scheme, the working state of the motor is monitored by setting the touch screen.

Preferably, the P L C controller is a Siemens brand 6ES7214-1BG40-0XBO model P L C controller.

Drawings

FIG. 1 is a connection diagram of the present invention;

fig. 2 is a circuit diagram of a first part of the invention;

fig. 3 is a circuit diagram of the second part of the present invention.

Detailed Description

As shown in fig. 1 to 3, in this embodiment, the present invention includes a control module and a plurality of three-phase motors M1/M2/M3, a plurality of three-phase motors M1/M2/M3 are respectively provided with a proximity switch SQ1/SQ 1, the proximity switch SQ1/SQ 1 is matched with an output shaft of the three-phase motors M1/M1, the control module includes a P1C controller a, the plurality of proximity switches SQ1/SQ 1 are respectively connected with a signal terminal of the P1C controller a in a one-to-one correspondence manner, the plurality of three-phase motors M1/M1 are electrically connected with the P1C controller a, and the P1C controller a controls forward and reverse rotation of all the three-phase motors M1/M1 and controls independent start and stop of the single three-phase motor M1/M1.

In this embodiment, the utility model discloses still include the motor power module, the motor power module includes positive and negative rotation circuit and a plurality of first ac contactor KM1/KM2/KM3, a plurality of first ac contactor KM1/KM2/KM3 all with positive and negative rotation circuit connection, a plurality of the power end of three-phase motor M1/M2/M3 correspond with a plurality of three normally open switch of first ac contactor KM1/KM2/KM3 are connected, a plurality of the coil of first ac contactor KM1/KM2/KM3 all with the current control port one-to-one of P L C controller A is connected, the model number of first ac contactor KM1/KM2/KM3 is L C1D-D09 BDC.

In this embodiment, the motor power supply module further includes a first low-voltage switch S1 and a plurality of thermal relays FR1/FR2/FR3, an input end of the first low-voltage switch S1 is connected to an external three-phase power, the forward/reverse circuit is connected to an output end of the first low-voltage switch S1, the plurality of thermal relays FR1/FR2/FR3 are correspondingly connected in series between the plurality of three-phase motors M1/M2/M3 and the plurality of first ac contactors KM1/KM2/KM3, the types of the thermal relays FR1/FR2/FR3 are L RD-10c, and the type of the first low-voltage switch S1 is A9F 27350.

In this embodiment, the forward-reverse circuit includes a third ac contactor KM4 and a fourth ac contactor KM5 connected in parallel, the third ac contactor KM4 is connected in series with an output terminal of the first low-voltage switch S1, an input first phase of the fourth ac contactor KM5 is connected with an input third phase of the third ac contactor KM4, an input third phase of the fourth ac contactor KM5 is connected with an input first phase of the third ac contactor KM4, one current control port of the P L C controller a, the normally closed switch of the third ac contactor KM4, and the coil of the fourth ac contactor KM5 are connected in series in sequence, one current control port of the P L C controller a, the normally closed switch of the fourth ac contactor KM5, and the coil of the third ac contactor KM4 are connected in series in sequence, and the third ac contactor KM 39 5 and the fourth ac contactor KM 39L C1-D-BDC 18 are both in model.

In the embodiment, the output shaft of the three-phase motor M1/M2/M3 is correspondingly provided with a trigger piece matched with the proximity switch SQ1/SQ2/SQ 3.

In this embodiment, the control module further includes a touch screen B electrically connected to the P L C controller a.

In the embodiment, the P L C controller A is a P L C controller of Siemens brand 6ES7214-1BG40-0XBO model.

The utility model discloses still include 24VDC power supply circuit, 24VDC power supply circuit is used for the conversion alternating current to the direct current, does P L C controller A 'S current control end power supply, and does proximity switch SQ1/SQ2/SQ 3' S two input power supplies, 24VDC power supply circuit includes second low-voltage switch S2.

The utility model discloses a theory of operation:

the three-phase motor M1/M2/M3 drives the corresponding trigger piece to rotate, so that the proximity switch SQ1/SQ2/SQ3 is triggered, after the proximity switch SQ1/SQ2/SQ3 is triggered, a pulse signal is fed back to a signal end of the P L C controller A, a counter in the P L C controller A counts, when the rotation times of all the three-phase motors M1/M2/M3 are different, the three-phase motor with higher counting is stopped, and the three-phase motor is started again after the rotation times of the rest three-phase motors are equal to or close to the numerical values of the three-phase motors.

Claims

1. The cooperative work system of the lifting unit is characterized by comprising a control module and a plurality of three-phase motors (M1/M2/M3), wherein each of the plurality of three-phase motors (M1/M2/M3) is provided with a proximity switch (SQ 1/SQ 1/SQ 1), the proximity switches (SQ 1/SQ 1/SQ 1) are matched with output shafts of the three-phase motors (M1/M1/M1), the control module comprises a P1C controller (A), the plurality of proximity switches (SQ 1/SQ 1/SQ 1) are respectively and correspondingly connected with signal ends of the P1C controller (A), the plurality of three-phase motors (M1/M1/M1/M1) are electrically connected with the P1C controller (A), and the P1C controller (A) controls the positive and negative rotation of all the three-phase motors (M1/M1/M1) and the single three-phase motor (M1/M1/M1) to start and stop the single three-phase motor (M1/M1/M.

2. The cooperative work system of lifting units as claimed in claim 1, further comprising a motor power supply module, wherein the motor power supply module comprises a forward-reverse circuit and a plurality of first ac contactors (KM 1/KM2/KM 3), a plurality of first ac contactors (KM 1/KM2/KM 3) are connected to the forward-reverse circuit, a plurality of three-phase motors (M1/M2/M3) have power terminals correspondingly connected to three normally-open switches of a plurality of first ac contactors (KM 1/KM2/KM 3), and coils of a plurality of first ac contactors (KM 1/KM2/KM 3) are correspondingly connected to current control ports of the P L C controller (A).

3. The lift unit cooperative work system according to claim 2, wherein: the motor power supply module further comprises a first low-voltage switch (S1) and a plurality of thermal relays (FR 1/FR2/FR 3), wherein an input end of the first low-voltage switch (S1) is connected with external three-phase electricity, the forward and reverse circuit is connected with an output end of the first low-voltage switch (S1), and the plurality of thermal relays (FR 1/FR2/FR 3) are correspondingly connected in series between the plurality of three-phase motors (M1/M2/M3) and the plurality of first alternating-current contactors (KM 1/KM2/KM 3).

4. The cooperative work system of a lifting unit as claimed in claim 3, wherein the forward/reverse rotation circuit comprises a third AC contactor (KM 4) and a fourth AC contactor (KM 5) connected in parallel, the third AC contactor (KM 4) is connected in series with an output terminal of the first low voltage switch (S1), an input first phase of the fourth AC contactor (KM 5) is connected with an input third phase of the third AC contactor (KM 4), an input third phase of the fourth AC contactor (KM 5) is connected with an input first phase of the third AC contactor (KM 4), one current control port of the P L C controller (A), a normally closed switch of the third AC contactor (KM 4) and a coil of the fourth AC contactor (KM 5) are connected in series, and one current control port of the P L C controller (A), a normally closed switch of the fourth AC contactor (KM 5) and a coil of the third AC contactor (KM 4) are connected in series.

5. The lift unit cooperative work system according to claim 1, wherein: and a trigger piece matched with the proximity switch (SQ 1/SQ2/SQ 3) is arranged on an output shaft of the three-phase motor (M1/M2/M3).

6. The lift unit coordination system according to claim 1, wherein said control module further comprises a touch screen (B) in electrical signal connection with said P L C controller (A).

7. The cooperative work system of lifting units as claimed in claim 1, wherein the P L C controller (A) is a Siemens brand 6ES7214-1BG40-0XBO model P L C controller.