A control circuit for a crane controlled by two remote controls

Abstract

The utility model discloses a control circuit of double remote controller control crane, including general contactor control circuit, remote controller one power supply circuit, remote controller two power supply circuit, remote controller one emergency stop control circuit, remote controller two emergency stop control circuit and remote control start control circuit, general contactor control circuit has contactor coil KM1 in series, the normally open contact of relay K01, the normally open contact of relay K03, the normally open contact of relay K01 is connected in parallel the normally open contact of relay K02, the normally open contact of relay K03 is connected in parallel the normally open contact of contactor coil KM1, and remote controller one power supply circuit has the normally closed contact of relay K02 in series. The utility model discloses through the emergency stop of remote controller each independent, realizes the interlock of remote controller, and the automatic completion remote controller's priority control authority, and still can control crane general power supply, and the circuit is simple, reliable in use, and can be extended to the multi remote controller control occasion.

Description

Technical Field

[0001] This utility model relates to the field of crane control technology, specifically a control circuit for a crane controlled by dual remote controllers. Background Technology

[0002] Cranes, as an indispensable special equipment in the industrial field, must ensure high reliability while also being easy to operate and quick and efficient in case of failure. Currently, an increasing number of cranes are equipped with remote controls. Furthermore, to meet the need for rapid production recovery in the event of remote control failure, a single crane is often equipped with two sets of remote controls. This reveals two problems: either the interlocking design between the two remote controls is too complex and inconvenient for maintenance, or the interlocking control is unreasonable, easily causing mutual signal interference and posing safety hazards. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a control circuit for a crane controlled by dual remote controllers. The remote controllers achieve interlocking through independent emergency stops, automatically complete the priority control authority of the remote controllers, and can also control the main power supply of the crane. The circuit is simple, reliable, and can be extended to multi-remote controller applications, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a control circuit for a crane controlled by dual remote controllers, comprising a main contactor control circuit, a power supply circuit for remote controller one, a power supply circuit for remote controller two, an emergency stop control circuit for remote controller one, an emergency stop control circuit for remote controller two, and a remote start control circuit; The main contactor control circuit is connected in series with contactor coil KM1, normally open contact of relay K01 and normally open contact of relay K03. The normally open contact of relay K01 is connected in parallel with the normally open contact of relay K02, and the normally open contact of relay K03 is connected in parallel with the normally open contact of contactor coil KM1. The power circuit of the remote control has a normally closed contact of relay K02 connected in series. The power supply circuit of the remote control is connected in series with the normally closed contact of relay K01; The emergency stop control circuit of the remote control is connected in series with relay K01 and emergency stop rotary switch of the remote control. The emergency stop control circuit of the second remote controller is connected in series with relay K02 and the emergency stop rotary switch of the second remote controller; The remote start control circuit includes two parallel branches, which are connected in series with the start button of remote controller one and the start button of remote controller two, respectively, and the two parallel branches are connected in series with relay K03.

[0005] Preferably, it also includes a remote control hoisting control circuit, which includes two parallel branches. The two parallel branches are respectively connected in series with the hoisting button of remote control one and the hoisting button of remote control two, and the two parallel branches are connected in series with relay K04.

[0006] Preferably, it also includes a remote control descent control circuit, which includes two parallel branches. The two parallel branches are connected in series with the descent button of remote control one and the descent button of remote control two, respectively, and the two parallel branches are connected in series with relay K05.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: When any remote control presses the start button, the relay K03 of the remote control start control circuit is turned on. Then, when the emergency stop knob switch of the remote control is pressed, the relay K01 is also automatically turned on, and the contactor coil KM1 is energized. At this time, the power circuit of the other remote control is disconnected due to the interlocking effect of K01, and loses its operating authority. Only the remote control with priority operating authority can work, thus realizing priority control. The remote control interlocking is achieved through the independent emergency stop of each remote control, which automatically completes the priority control authority of the remote control. It can also control the total power supply of the crane. The circuit is simple, reliable, and can be extended to multi-remote control occasions. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the circuit control principle of this utility model.

[0009] In the diagram: 1. Main contactor control circuit; 2. Remote control 1 power supply circuit; 3. Remote control 2 power supply circuit; 4. Remote control 1 emergency stop control circuit; 5. Remote control 2 emergency stop control circuit; 6. Remote control start control circuit; 7. Remote control hoisting control circuit; 8. Remote control descent control circuit. Detailed Implementation

[0010] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right" indicating the orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation.

[0011] Please see Figure 1 The present invention provides the following technical solution: Example 1: A control circuit for a crane controlled by two remote controllers, including a main contactor control circuit 1, a power supply circuit for remote controller one 2, a power supply circuit for remote controller two 3, an emergency stop control circuit for remote controller one 4, an emergency stop control circuit for remote controller two 5, and a remote start control circuit 6. The main contactor control circuit 1 is connected in series with contactor coil KM1, normally open contact of relay K01 and normally open contact of relay K03. The normally open contact of relay K01 is connected in parallel with the normally open contact of relay K02, and the normally open contact of relay K03 is connected in parallel with the normally open contact of contactor coil KM1. The power circuit 2 of the remote control has a normally closed contact of relay K02 connected in series. The power supply circuit 3 of the remote control has a normally closed contact of relay K01 connected in series. The emergency stop control circuit 4 of remote control 1 is connected in series with relay K01 and emergency stop rotary switch of remote control 1; The emergency stop control circuit 5 of remote control 2 is connected in series with relay K02 and emergency stop rotary switch of remote control 2; The remote start control circuit 6 includes two parallel branches, which are connected in series with the start button of remote controller 1 and the start button of remote controller 2, respectively, and the two parallel branches are connected in series with relay K03. Both remote control 1 and remote control 2 need to be started before they can work. That is, remote control 1 needs to have its start button pressed before it will work, and similarly, remote control 2 needs to have its start button pressed before it will work. When remote control 1 or remote control 2 is started, relay K03 is energized, and the normally open contact of relay K03 on the main contactor control circuit 1 closes. When using remote control one, rotating the emergency stop knob switch of remote control one energizes the emergency stop control circuit 4 of remote control one, energizes relay K01, closes the normally open contact of relay K01 on the main contactor control circuit 1, and the contactor coil KM1 is energized. At the same time, the normally open contact of contactor coil KM1 closes and self-locks, and the crane can only work when connected to the three-phase power supply. When the normally closed contact of relay K01 on the power circuit 3 of remote control two opens, the power supply of remote control two is disconnected, that is, the power supply of remote control two is cut off, and remote control two cannot work. When using remote control 2, rotating the emergency stop knob switch of remote control 1 energizes the emergency stop control circuit 5 of remote control 2, which in turn energizes relay K02. The normally open contact of relay K02 on the main contactor control circuit 1 closes, and contactor coil KM1 is energized. At the same time, the normally open contact of contactor coil KM1 closes and self-locks, and the crane can only work when connected to three-phase power. Meanwhile, the normally closed contact of relay K02 on the power circuit 2 of remote control 1 opens, thus disconnecting the power supply to remote control 1, i.e., the power supply to remote control 1 is cut off, and remote control 1 cannot work. The normally closed contacts of the emergency stop control circuit relays of the other remote control are connected in series in the power circuits of the two remote controls to form an interlock function. Only the remote control with priority can work, and the other remote control cannot work. Priority control is achieved to ensure safe operation. It can also be extended to multi-remote control occasions. Other circuits with the same function of the remote control are directly connected in parallel to control the relays. The circuit is simple and reliable.

[0012] Example 2: Unlike Example 1, it also includes a remote lifting control circuit 7 and a remote lowering control circuit 8. The remote lifting control circuit 7 includes two parallel branches, each connected in series with the lifting button of remote controller 1 and the lifting button of remote controller 2, respectively. The two parallel branches are connected in series with relay K04. The remote lowering control circuit 8 includes two parallel branches, each connected in series with the lowering button of remote controller 1 and the lowering button of remote controller 2, respectively. The two parallel branches are connected in series with relay K05. By operating the lifting button of remote controller 1 or remote controller 2, relay K04 is energized and used to output a switch to control the lifting of the crane. Similarly, by operating the lowering button of remote controller 1 or remote controller 2, relay K05 is energized and used to output a switch to control the lowering of the crane.

[0013] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents in the content of this utility model.

Claims

1. A control circuit for a crane controlled by dual remote controllers, characterized in that: It includes a main contactor control circuit (1), a remote control power supply circuit (2), a remote control power supply circuit (3), a remote control emergency stop control circuit (4), a remote control emergency stop control circuit (5), and a remote start control circuit (6). The main contactor control circuit (1) is connected in series with contactor coil KM1, normally open contact of relay K01 and normally open contact of relay K03, normally open contact of relay K01 is connected in parallel with normally open contact of relay K02, and normally open contact of relay K03 is connected in parallel with normally open contact of contactor coil KM1. The power circuit (2) of the remote control is connected in series with the normally closed contact of relay K02; The power supply circuit (3) of the remote control is connected in series with the normally closed contact of relay K01; The emergency stop control circuit (4) of the remote control is connected in series with relay K01 and emergency stop rotary switch of the remote control. The emergency stop control circuit (5) of the remote control 2 is connected in series with relay K02 and emergency stop rotary switch of remote control 2; The remote start control circuit (6) includes two parallel branches, which are connected in series with the start button of remote controller one and the start button of remote controller two, respectively, and the two parallel branches are connected in series with relay K03.

2. The control circuit for a crane controlled by a dual remote controller according to claim 1, characterized in that: It also includes a remote lifting control circuit (7), which includes two parallel branches. The two parallel branches are connected in series with the lifting button of remote controller one and the lifting button of remote controller two, respectively. The two parallel branches are connected in series with relay K04.

3. The control circuit for a crane controlled by a dual remote controller according to claim 1, characterized in that: It also includes a remote control descent control circuit (8), which includes two parallel branches. The two parallel branches are connected in series with the descent button of remote control one and the descent button of remote control two, respectively. The two parallel branches are connected in series with relay K05.

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