A general crane control linkage interlock device and control method

Abstract

A general crane control interlock device and control method belong to the technical field of general crane electrical control. This general crane control interlock device includes a handheld remote control and a control interlock device. The control interlock device includes a signal receiving module, a control module, and an action controller. The control module includes an input terminal block, a controller component group, and an output terminal block. The input terminal block is communicatively connected to the handheld remote control through the signal receiving module, and the output terminal block is communicatively connected to the crane through the action controller. By connecting the control module between the signal receiving module and the action controller, this device realizes the interlock function among various command actions of the crane. The crane can only receive a single command action through the control device, thus achieving the purpose of effectively controlling and safely operating the crane. In addition, this device has a simple structure and is convenient to operate. The linkage interlock of the crane operation is effectively realized through the input terminal block, the output terminal block, and a relay group.

Description

Technical Field

[0001] The present invention relates to a general crane control interlocking device and a control method, belonging to the technical field of general crane electrical control. Background Art

[0002] A crane, also known as a hoist, is a multi-action lifting machine that can carry heavy objects in multiple directions within a certain space. Due to its advantages such as stable operation, large lifting capacity, and the ability to lift heavy objects and move within a specific space range, the application proportion of cranes in production enterprises is increasing. During the working process of lifting equipment, it usually alternates between material taking, transportation, and unloading. During these conventional intermittent operations, to ensure operation safety, it is usually required that the crane perform a single action. In actual work, however, due to operating habits or efficiency considerations, operators often operate the trolley and the gantry simultaneously, or control the trolley, the gantry, and the hoisting simultaneously, which greatly increases the safety risk, and there are not a few safety accidents caused by similar operations. With the development of modern industry, safety management has become particularly important. Currently, the control device of a crane usually directly connects the action buttons on the remote control device to the controller of the crane. When multiple action buttons are pressed simultaneously, the crane can perform multiple actions simultaneously, resulting in the inability to effectively control the standard operation of the crane. Based on the improvement of safety management, there is an urgent need for an essential safety improvement. Starting from technical means, the possibility of interlocking operation should be completely avoided, and the safety control level of crane operation at the operation site should be improved. Summary of the Invention

[0003] In order to overcome the problems existing in the prior art, the present invention provides a general crane control interlocking device and a control method. The device has strong versatility, is convenient for installation and wiring, is connected in series to the operation control circuit, effectively realizes the interlocking of crane operation, achieves essential safety improvement, reduces the operation safety risk, and can be widely applied to the operation control of existing cranes.

[0004] The technical solution adopted by the present invention is: a general crane control interlocking device includes a handheld remote control and a control interlocking device. The handheld remote control is communicatively connected to the crane through the control interlocking device. The control interlocking device includes a signal receiving module, a control module, and an action controller. The control module includes an input terminal block, a controller component group, and an output terminal block. The input terminal block is communicatively connected to the handheld remote control through the signal receiving module, and the output terminal block is communicatively connected to the crane through the action controller;

[0005] The described controller device group includes six relays. The input terminal block includes six input terminals, the output terminal block includes six output terminals and a common terminal. Each input terminal on the input terminal block is sequentially connected in series with a normally closed contact of four relays, and then one branch is sequentially connected to the common terminal of the remaining one relay and the common terminal of the output terminal block, and the other branch is connected to the corresponding operating output terminal on the output terminal block;

[0006] The relay controlling one action is not connected to the control circuit for the opposite action.

[0007] The relay adopts a four-open-close relay.

[0008] The control method of a general crane control linkage interlock device includes the following steps:

[0009] a) After the signal receiving module receives the command action, it transmits the signal to the corresponding input terminal on the input terminal block;

[0010] b) The corresponding input terminal is connected to the relay controlling the command action and the output terminal block corresponding to the action through the four relays connected in series to form a closed loop;

[0011] c) After the output terminal is powered, it transmits the action command to the action controller, and the controller controls the crane to execute the command action.

[0012] After the input terminal receives the action command, the four relays connected to it are powered on and act, converting from normally closed contacts to normally open contacts, so as to connect the relay controlling the command action, the command action output terminal and the common terminal on the output terminal block to the circuit. After the corresponding operating output terminal is powered, it transmits the action command signal to the action controller, so that the controller controls the crane to execute the command action. After the relay with the normally closed contact acts, the signal is transmitted to the action controller, and at the same time the relay acts, and the four groups of normally closed contacts are converted to normally open contacts, and the other action output circuits connected are in the off state until the action ends. The crane only receives one command action and can only execute this action. Therefore, through this control method, it can effectively prevent the crane from executing two actions at the same time. By analogy, no matter which mechanism runs first, before this mechanism stops, the remaining mechanisms cannot act, so as to achieve control interlock.

[0013] Advantages of the present invention: This general crane control interlock device includes a handheld remote control and a control interlock device. The handheld remote control is communicatively connected to the crane through the control interlock device. The control interlock device includes a signal receiving module, a control module, and an action controller. The control module includes an input terminal block, a controller component group, and an output terminal block. The input terminal block is communicatively connected to the handheld remote control through the signal receiving module, and the output terminal block is communicatively connected to the crane through the action controller. By connecting the control module between the signal receiving module and the action controller, this device realizes the interlock function among various command actions of the crane. The crane can only receive a single command action through the control device, thus achieving the purpose of effectively controlling and safely operating the crane. In addition, this device has a simple structure and convenient operation, and effectively realizes the linkage interlock of the crane operation through the input terminal block, the output terminal block, and a relay group. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of a general crane control interlock device.

[0015] Figure 2 is Figure 1 the circuit connection diagram of the interlock control module in

[0016] Among them, CR1, rising inhibition relay; CR2, falling inhibition relay; CR3, eastward inhibition relay; CR4, westward inhibition relay; CR5, southward inhibition relay; CR1, northward inhibition relay; S1, input terminal block; S2, output terminal block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will be described in complete detail below with reference to the accompanying drawings.

[0018] Figure 1The structural schematic diagram of a general crane control interlock device is shown. In the figure, this general crane control interlock device includes a handheld remote control and a control interlock device. The handheld remote control is communicatively connected to the crane through the control interlock device. The control interlock device includes a signal receiving module, a control module, and an action controller. The control module includes an input terminal block, a controller component group, and an output terminal block. The input terminal block is communicatively connected to the handheld remote control through the signal receiving module, and the output terminal block is communicatively connected to the crane through the action controller. The controller component group includes a rising inhibition relay CR1, a falling inhibition relay CR2, an eastward inhibition relay CR3, a westward inhibition relay CR4, a southward inhibition relay CR5, and a northward inhibition relay CR6. The input terminal block S1 includes six input terminals for upward, downward, eastward, westward, southward, and northward (up, down, east, west, north, south). The corresponding output terminal block S2 includes six output terminals for upward, downward, eastward, westward, southward, and northward (N, S, W, E, D, U) and a common terminal (COM). The input terminal U receives the rising signal, the input terminal D receives the falling signal, the input terminal W receives the westward signal, the input terminal E receives the eastward signal, the input terminal N receives the northward signal, and the input terminal S receives the southward signal. The common terminal on the output terminal block S2 is connected to the common ends of the six relays. The output terminal N outputs the northward signal, the output terminal S outputs the southward signal, the output terminal W outputs the westward signal, the output terminal E outputs the eastward signal, the output terminal D outputs the downward signal, and the output terminal U outputs the upward signal.

[0019] The input terminal (up) on the input terminal block S1 sequentially connects in series a set of normally closed contacts on the southward inhibition relay CR5, the northward inhibition relay CR6, the westward inhibition relay CR4, and the eastward inhibition relay CR3. The latter branch is connected to the common end of the rising inhibition relay CR1 and the common terminal (COM) on the output terminal block S2, and the other branch is connected to the upward output terminal U on the output terminal block S2. The input terminal (down) sequentially connects in series another set of normally closed contacts on the southward inhibition relay CR5, the northward inhibition relay CR6, the westward inhibition relay CR4, and the eastward inhibition relay CR3. The latter branch is connected to the common end of the falling inhibition relay CR2 and the common terminal (COM) on the output terminal block S2, and the other branch is connected to the downward output terminal D on the output terminal block S2. The relays (CR1, CR2) for controlling upward and downward movements are not connected to each other's control circuits.

[0020] Similarly, the input terminal W is sequentially connected in series with a normally closed contact on the northward inhibition relay CR6, the southward inhibition relay CR5, the upward inhibition relay CR1, and the downward inhibition relay CR2. The latter branch is connected to the common terminal of the westward inhibition relay CR4 and the common terminal (COM), and the other branch is connected to the westward output terminal W on the output terminal block S2. The input terminal (east) is sequentially connected in series with another normally closed contact on the northward inhibition relay CR6, the southward inhibition relay CR5, the upward inhibition relay CR1, and the downward inhibition relay CR2. The latter branch is connected to the common terminal of the eastward inhibition relay CR3 and the common terminal (COM), and the other branch is connected to the eastward output terminal E on the output terminal block S2. The relays (CR3, CR4) that control the westward and eastward movements are not connected to each other's control circuits.

[0021] Similarly, the input terminals (north) and input terminals (south) that control the southward and northward directions are connected in series with a set of normally closed contacts of CR1, CR2, CR3, and CR4 and then respectively connected to the circuits controlled by the southward inhibition relay CR5 and the northward inhibition relay CR6 (as Figure 2 shown).

[0022] The relay adopts a four-open and closed relay, and only one contact switch on the same relay is connected to one circuit.

[0023] Taking the control of the crane's upward movement as an example, the working method of this general crane control linkage interlock device is described as follows:

[0024] a) Press the upward action button on the handheld remote control to transmit the signal to the signal receiving module;

[0025] b) The signal receiving module transmits the upward action instruction to the input terminal block S1. After the input terminal (up) receives the upward signal, it connects the eastward inhibition relay CR3, the westward inhibition relay CR4, the southward inhibition relay CR5, and the northward inhibition relay CR6. The switches of the four relays are converted from normally closed contacts to normally open contacts, and finally connect the control circuit of the upward inhibition relay CR1, and transmit the action instruction to the upward output terminal U on the terminal output terminal block S2;

[0026] c) After the upward output terminal U is powered on, it transmits the control signal to the action controller;

[0027] d) After the action controller receives the upward instruction, it controls the crane to lift the object upward (on the premise that the limit device is not touched).

[0028] After the rising inhibition relay CR1 is powered on, its coil is energized and the normally closed contacts will open; the electrical signal of each mechanism will pass through the normally closed contacts of the other two mechanisms. Therefore, when the input terminal S1 (W, E, N, S) receives the corresponding signal, it will be blocked, and the crane cannot receive the corresponding instruction and will not perform the corresponding action. At this time, the crane only has one rising action.

[0029] And so on. No matter which mechanism (up, down, east, west, south, or north) runs first, the remaining mechanisms cannot move until this mechanism stops, thus realizing control interlock.

Claims

1. A general crane control linkage interlock device, which comprises a handheld remote control and a control interlock device. The handheld remote control is communicatively connected to the crane through the control interlock device, and is characterized in that The control interlock device includes a signal receiving module, a control module, and an action controller. The control module includes an input terminal block, a controller component group, and an output terminal block. The input terminal block is communicatively connected to a handheld remote controller through the signal receiving module, and the output terminal block is communicatively connected to a crane through the action controller. The controller component group includes six relays. The input terminal block includes six input terminals. The output terminal block includes six output terminals and a common terminal. Each input terminal on the input terminal block is sequentially connected in series with a normally closed contact of four relays, and then one branch is sequentially connected to the common terminal of the remaining one relay and the common terminal of the output terminal block, and the other branch is connected to the output terminal corresponding to the corresponding action on the output terminal block. The relay for controlling one action is not connected to the control circuit for controlling the opposite action.

2. The general crane control linkage interlock device according to claim 1, characterized in that, The relay adopts a four-open and closed relay.

3. The control method of a general crane control linkage interlock device according to claim 1, characterized in that It includes the following steps: a) After the signal receiving module receives the command action, it transmits the signal to the corresponding input terminal of the input terminal block. b) The corresponding input terminal connects the relay for controlling the command action and the output terminal corresponding to the action through the four relays connected in series to form a closed loop. c) After the output terminal is powered, it transmits the action command to the action controller, and the controller controls the crane to execute the command action.

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