CN211908351U

CN211908351U - Driving control system

Info

Publication number: CN211908351U
Application number: CN202020437238.1U
Authority: CN
Inventors: 林业; 庄文平; 李娟�
Original assignee: Linqu Yulong Paper Co ltd
Current assignee: Linqu Yulong Paper Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-11-10
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses a traveling crane control system, which relates to the technical field of motor control and comprises a main circuit and a control circuit for controlling the operation of a crane motor of the traveling crane, wherein the main circuit comprises an auxiliary contactor and a motor protector which are connected in series; the control circuit comprises a main protection circuit, and a manual power-on button is connected in series in the main protection circuit. The utility model discloses driving control system has solved the technical problem that the hoist motor easily burns out among the prior art, the utility model discloses driving control system can effectual protection hoist motor not burnt out, has guaranteed the life of hoist motor, has guaranteed the normal operating of driving.

Description

Driving control system

Technical Field

The utility model relates to a motor control technical field, in particular to a hoist control system for driving.

Background

The crane is installed in the workshop of present many processing enterprises for conveniently remove large-scale or heavier article, install the hoist on the crane, the hoist is equipped with the couple that is used for hoisting the article, rises and descends by the hoist motor drive. The crane motor is inching control, and the main circuit and the control circuit schematic diagram are shown in figures 1 and 2: the main circuit of the crane comprises a first contactor KM1 and a second contactor KM2 which are respectively used for controlling the forward rotation (ascending) and the reverse rotation (descending) of a crane motor M. The control circuit comprises a crane ascending circuit and a crane descending circuit which are connected in parallel, the crane ascending circuit is used for powering on and off a coil of the first contactor KM1, the crane descending circuit is used for powering on and off a coil of the second contactor KM2, and the auxiliary long closed contact of the first contactor KM1 and the auxiliary long closed contact of the second contactor KM2 are interlocked.

The main circuit of the crane motor is free of any phase loss, overload and other faults, but the crane often works in a short-time point-action state in daily life, and because of frequent point-action operation, the crane motor is frequently started, main contacts of the first contactor and the second contactor are easily damaged, and the phase loss or adhesion and other faults are caused, so that the crane motor is burnt.

Disclosure of Invention

To above defect, the utility model aims at providing a driving control system, this driving control system can effectual protection hoist motor, reduces the risk that the hoist motor is burnt out, has guaranteed the life of hoist motor.

In order to realize the purpose, the technical scheme of the utility model is that:

a traveling crane control system comprises a main circuit and a control circuit, wherein the main circuit is used for controlling a crane motor of a traveling crane to operate, and comprises an auxiliary contactor and a motor protector which are connected in series; the control circuit comprises a main protection circuit, and a manual power-on button is connected in series in the main protection circuit.

The main circuit further comprises a first contactor and a second contactor which are used for controlling the forward rotation and the reverse rotation of the crane motor respectively.

The main protection circuit comprises a long closed contact of the motor protector, a long open contact of the manual power-on button and a coil of the auxiliary contactor which are connected in series, and the long open auxiliary contact of the auxiliary contactor is connected with the manual power-on button in parallel.

The control circuit further comprises a crane ascending circuit and a crane descending circuit which are connected with the main protection circuit in parallel.

The crane ascending circuit comprises a long closed auxiliary contact of the second contactor, a long open contact of the ascending button and a coil of the first contactor which are connected in series.

The crane descending circuit comprises a long closed auxiliary contact of the first contactor, a long open contact of the descending button and a coil of the second contactor which are connected in series.

The long closed contact of the motor protector, the long closed contact of the first contactor and the long closed contact of the second contactor are all electrically connected with a power line; and the coil of the first contactor, the coil of the second contactor and the coil of the auxiliary contactor are electrically connected with a power supply zero line.

Wherein, the model of motor protector is JD-8.

After the technical scheme is adopted, the beneficial effects of the utility model are that:

the utility model comprises a main circuit and a control circuit for controlling the operation of the crane motor of the crane, wherein the main circuit comprises an auxiliary contactor and a motor protector which are connected in series; the control circuit comprises a main protection circuit, and a manual power-on button is connected in series in the main protection circuit. When the contacts of the first contactor and the second contactor are damaged, and a crane motor is in phase failure or overloaded, the motor protector can detect fault current, and the long-closed contacts of the motor protector are disconnected, so that the coil of the auxiliary contactor is powered off, the crane motor stops running, after the fault is eliminated, the coil of the auxiliary contactor is powered on after the manual power-on button is manually pressed, and the crane motor can normally work. Therefore, the crane motor is ensured not to work under the condition of phase failure or overload, the crane motor is effectively protected not to be burnt down due to faults such as phase failure or overload, the service life of the crane motor is ensured, and the normal running of a travelling crane is ensured.

To sum up, the utility model discloses driving control system has solved the technical problem that the hoist motor easily burns out among the prior art, the utility model discloses driving control system can effectual protection hoist motor not burnt out, has guaranteed the life of hoist motor, has guaranteed the normal operating of driving a vehicle.

Drawings

FIG. 1 is a schematic diagram of a main circuit of a vehicle control system in the prior art;

FIG. 2 is a schematic diagram of a control circuit of a vehicle control system according to the prior art;

FIG. 3 is a schematic diagram of a main circuit of the traveling control system of the present invention;

fig. 4 is a control circuit schematic diagram of the driving control system of the present invention.

Detailed Description

The invention is further explained below with reference to the drawings and examples.

All the orientations referred to in the present specification are based on the orientations shown in the drawings, and only represent relative positional relationships, not absolute positional relationships.

As shown in fig. 3 and 4 together, a crane control system includes a main circuit for controlling the operation of a crane motor M of a crane and a control circuit.

As shown in fig. 3, a motor protector and an auxiliary contactor KM0 are connected in series in the main circuit. The specific implementation mode is as follows: the main contact end of the auxiliary contactor KM0 is electrically connected with a three-phase power supply, the other end of the main contact of the auxiliary contactor KM0 is electrically connected with a motor protector, the model of the motor protector is preferably JD-8 in the present embodiment, so the motor protector is replaced by JD-8 in a circuit schematic diagram, the motor protector JD-8 is electrically connected with the main contact of the first contactor KM1 and the main contact of the second contactor KM2, the first contactor KM1 and the second contactor KM2 are used for controlling the forward rotation and the reverse rotation of the crane motor M, namely, the main contact of the first contactor KM1 and the main contact of the second contactor KM2 are connected into a forward and reverse rotation circuit, and the main contact of the first contactor KM1 and the main contact of the second contactor KM 2. Wherein the first contactor KM1 is switched on, and the crane motor M rotates forwards; the second contactor KM2 was switched on and the crane motor M reversed.

As shown in fig. 4, the control circuit includes a main protection circuit, a crane ascent circuit, and a crane descent circuit. The main protection circuit, the crane ascending circuit and the crane descending circuit are connected in parallel, namely the crane ascending circuit and the crane descending circuit are connected in parallel with the main protection circuit. One ends of the main protection circuit, the crane ascending circuit and the crane descending circuit are all electrically connected with a power live wire, and the other ends of the main protection circuit, the crane ascending circuit and the crane descending circuit are all electrically connected with a power zero wire.

As shown in fig. 4, a manual power-on button SB0 is connected in series in the main protection circuit, and the specific implementation manner is as follows: namely, the main protection circuit comprises a long closed contact of a motor protector JD-8, a long open contact of a manual power-on button SB0 and a coil of an auxiliary contactor KM0 which are connected in series, and the long open auxiliary contact of the auxiliary contactor KM0 is connected with the manual power-on button SB0 in parallel to form self-locking. The long closed contact of the motor protector JD-8 is electrically connected with a power supply live wire, and the coil of the auxiliary contactor KM0 is electrically connected with a power supply zero wire. When the crane motor M has a fault, the long closed contact of the motor protector JD-8 is disconnected, the coil of the auxiliary contactor KM0 loses power, the main contact of the auxiliary contactor KM0 is disconnected, and the crane motor M stops working. Because the auxiliary contactor KM0 does not participate in frequent inching operation, the contact is protected to be intact, and the main circuit of the crane motor M can be reliably disconnected when the motor fails. After the motor protector JD-8 is reset, the crane motor M can be started only by pressing the manual power-on button SB0 after manual troubleshooting due to the existence of the manual power-on button SB0, so that the crane motor M is effectively protected from being burnt out due to faults such as phase loss or overload, and the service life of the crane motor is ensured.

As shown in fig. 4, the crane lifting circuit includes the long closed auxiliary contact of the second contactor KM2, the long open contact of the lifting button SB1, and the coil of the first contactor KM1 connected in series. The long closed auxiliary contact of the second contactor KM2 is electrically connected with a power live wire, and the coil of the first contactor KM1 is electrically connected with a power neutral wire. When the crane needs to ascend, the crane only needs to press the ascending button SB1, and the crane stops ascending when the ascending button SB1 is released. The long-closed auxiliary contacts of the second contactor KM2 were interlocked, that is, when the coil of the second contactor KM2 was energized, the coil of the first contactor KM1 was not energized.

As shown in fig. 4, the crane lowering circuit includes the long closed auxiliary contact of the first contactor KM1, the long open contact of the lowering button SB2, and the coil of the second contactor KM2 connected in series. The long closed auxiliary contact of the first contactor KM1 is electrically connected with a power live wire, and the coil of the second contactor KM2 is electrically connected with a power neutral wire. When the crane needs to descend, the crane stops descending only by pressing the descending button SB2 and releasing the descending button SB 2. The elongated auxiliary contacts of the first contactor KM1 were interlocked, that is, when the coil of the first contactor KM1 was energized, the coil of the second contactor KM2 was not energized.

To sum up, the utility model discloses driving control system is because of having set up motor protector JD-8 and manual last electric button SB0, damage when first contactor KM1 and second contactor KM2 contact, when hoist motor M lacks looks or transships, motor protector JD-8 can detect fault current, its long closed contact disconnection, thereby supplementary contactor KM 0's coil outage, hoist motor M stop motion, thereby guaranteed that the hoist motor can not work under the condition of lacking looks or transshipping, the effectual hoist motor of having protected can not burn out because of faults such as lacking looks or transshipping, the life of hoist motor has been guaranteed, the normal operating of driving has been guaranteed.

The present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes without creative labor from the above conception, and all the changes fall within the protection scope of the present invention.

Claims

1. The crane control system comprises a main circuit and a control circuit, wherein the main circuit is used for controlling the crane motor of the crane to operate, and is characterized in that the main circuit comprises an auxiliary contactor and a motor protector which are connected in series; the control circuit comprises a main protection circuit, and a manual power-on button is connected in series in the main protection circuit.

2. A vehicle operation control system as claimed in claim 1, wherein said main circuit further comprises a first contactor and a second contactor for controlling forward and reverse rotation of said crane motor, respectively.

3. A vehicle operation control system according to claim 2, wherein said main protection circuit comprises a long closed contact of said motor protector, a long open contact of said manual power-on button and a coil of said auxiliary contactor connected in series, said long open auxiliary contact of said auxiliary contactor being connected in parallel with said manual power-on button.

4. The vehicle traveling control system according to claim 3, wherein the control circuit further comprises a crane ascending circuit and a crane descending circuit connected in parallel with the main protection circuit.

5. A vehicle control system as claimed in claim 4, wherein the crane raising circuit comprises in series the long closed auxiliary contact of the second contactor, the long open contact of the raising button and the coil of the first contactor.

6. A vehicle control system as claimed in claim 5, wherein the crane lowering circuit comprises in series the long closed auxiliary contact of the first contactor, the long open contact of the lowering button and the coil of the second contactor.

7. The vehicle running control system of claim 6, wherein the long closed contact of the motor protector, the long closed contact of the first contactor, and the long closed contact of the second contactor are all electrically connected to a power line; and the coil of the first contactor, the coil of the second contactor and the coil of the auxiliary contactor are electrically connected with a power supply zero line.

8. The vehicle motion control system of claim 1, wherein the motor protector is JD-8.