Wireless remote control device for grab bucket of travelling crane

Abstract

The utility model relates to the field of remote control equipment, in particular to a wireless remote control device for a grab bucket of a travelling crane, which comprises a field control cabinet positioned around the travelling crane, a wireless receiver transmitting unit for transmitting a control signal to the field control cabinet and a wireless receiver receiving unit for wirelessly receiving the control signal, an execution circuit for executing a plurality of control functions of the crane grab bucket is arranged in the field control cabinet; the wireless receiver transmitting unit is provided with a control button for transmitting a plurality of control signals according to a control function; and the receiving unit of the wireless receiver is in wired connection with an execution circuit in the field control cabinet. The device is not limited by a cable control handle, does not need to go to a control chamber and be operated on site, is convenient and rapid, and reduces the risk of high-place operation.

Description

Technical Field

[0001] The utility model relates to the field of remote control equipment, in particular to a wireless remote control device for a driving grab bucket. Background Art

[0002] The equipment used for dredging silt in power plants relies on cranes for lifting and transporting. Cranes are the common name for cranes, overhead cranes, overhead cranes, etc. Cranes are intermittently moving mechanisms. Their working characteristics are frequent starting and braking, and they are mainly used for grabbing and moving objects within the plant. The movement of the crane relies on the control system to control the motor to drive the reduction mechanism to drive forward or backward. The crane grabs objects and moves them mainly by relying on the grab bucket. In the process of grabbing objects, the motor mainly drives the reduction mechanism to drive the up and down, forward and backward movement and the opening and closing bucket devices to control (commonly known as electric hoists), thereby realizing the grabbing and transporting functions.

[0003] The electric hoist is installed on the overhead crane and gantry crane. The electric hoist has the characteristics of small size, light weight and simple operation. The electric hoist consists of an electric motor, a transmission mechanism and a drum or sprocket, and is divided into two types: wire rope electric hoist and chain electric hoist.

[0004] However, current electric hoists have the following problems: they are wired and their control range is limited by the length of the cable; they cannot observe the status of the dredging equipment in all directions; and personnel need to control the handle near the designated location or in the control room, which is cumbersome to operate. Utility Model Content

[0005] The utility model aims to provide a wireless remote control device for a crane grab bucket, so as to solve the problem that the control range of the existing crane grab bucket control is limited by the length of the cable.

[0006] The wireless remote control device for the crane grab in this solution includes a field control cabinet located around the crane, a wireless receiver transmitting unit for sending control signals to the field control cabinet, and a wireless receiver receiving unit for wirelessly receiving control signals;

[0007] The field control cabinet is provided with an execution circuit for executing multiple control functions on the crane grab bucket;

[0008] The wireless receiver transmitting unit is provided with a control button that transmits a plurality of control signals according to the control function;

[0009] The wireless receiver receiving unit is wired to the execution circuit in the field control cabinet.

[0010] Furthermore, the wireless receiver transmitting unit is provided with a button frequency conversion chip circuit board, a control button and a transmitting antenna, the control button signal is connected to the button frequency conversion chip circuit board, and the transmitting antenna signal is connected to the button frequency conversion chip circuit board.

[0011] Furthermore, the wireless receiver receiving unit is provided with a receiver relay, a frequency conversion contact chip circuit board, a wiring cable and a receiving antenna.

[0012] Furthermore, the execution circuit includes multiple grab execution branches connected in parallel between the positive power line and the negative power line to perform the functions of raising and lowering the hook, opening and closing, moving forward and backward, and running left and right. The execution branches correspond one-to-one to the control functions. The execution branches include switches connected in series in sequence from the positive power line to the negative power line, the normally open contacts of the receiver relay, and the first execution relay.

[0013] Furthermore, the execution circuit also includes a plurality of execution main circuits connected in parallel between the positive power line and the negative power line, and the execution main circuit includes a main power closing button, an opening button and a second execution relay connected in series in sequence from the positive power line to the negative power line, and the main power closing button is connected in parallel with the self-holding auxiliary contacts of the second execution relay.

[0014] Furthermore, the wireless receiver transmitting unit and the wireless receiver receiving unit include a rectangular shell, and the transmitting antennas are both located on the top of the shell.

[0015] The beneficial effects of this program are:

[0016] The control signal is sent to the wireless receiver receiving unit by wireless transmission. Wireless remote control is used, which is not restricted by the cable control handle. There is no need to go to the control room and operate on-site. It is convenient and fast, and reduces the risk of heights. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a circuit diagram of an execution circuit in an embodiment of a wireless remote control device for a crane grab bucket of the utility model;

[0018] Figure 2 It is a front view of a wireless receiver receiving unit in an embodiment of a wireless remote control device for a driving grab bucket of the utility model;

[0019] Figure 3 It is a front view of a wireless receiver transmitting unit in an embodiment of a wireless remote control device for a crane grab bucket of the utility model;

[0020] Figure 4 The utility model is a schematic diagram of the conversion and emission of the triode in the embodiment of the wireless remote control device for the driving grab bucket. DETAILED DESCRIPTION

[0021] The following is further explained in detail through specific implementation methods.

[0022] Example

[0023] Wireless remote control device for crane grab, such as Figure 1 , Figure 2 and Figure 3 As shown: it includes a field control cabinet located around the vehicle, a wireless receiver transmitting unit for sending control signals to the field control cabinet, and a wireless receiver receiving unit for wirelessly receiving control signals.

[0024] An execution circuit for executing multiple control functions for the crane grab is provided in the on-site control cabinet. The execution circuit includes multiple grab execution branches connected in parallel between the positive power line and the negative power line to execute the functions of raising the hook, lowering the hook, opening, closing, moving forward, backward, left and right. There are 8 grab execution branches, and the execution branches correspond to the control functions one by one, that is, 8 execution branches are set. The execution branches include switches connected in series in sequence from the positive power line to the negative power line, the normally open contact of the receiver relay and the first execution relay, that is, the hook raising operation button YK2 is electrically connected to the lock of the first execution relay KA3 for lowering the hook. Auxiliary contacts, the locking auxiliary contacts of the first execution relay KA3 for lowering the hook are electrically connected to the first execution relay KA2 for raising the hook, forming an execution branch; the hook lowering operation button YK3 is electrically connected to the locking auxiliary contacts of the first execution relay KA2 for raising the hook, and the locking auxiliary contacts of the first execution relay KA2 for raising the hook are electrically connected to the first execution relay KA3 for lowering the hook, forming an execution branch; the grab bucket opening operation button YK4 is electrically connected to the locking auxiliary contacts of the closing first execution relay KA5, and the locking auxiliary contacts of the first execution relay KA5 for closing the grab bucket are electrically connected to the opening first execution relay KA4, forming an execution branch. Branch; the grab bucket closing operation button YK5 is electrically connected to open the locking auxiliary contact of the first execution relay KA4, and the locking auxiliary contact of the grab bucket opening first execution relay KA4 is electrically connected to close the first execution relay KA5, forming an execution branch; the forward operation button YK6 is electrically connected to the locking auxiliary contact of the backward first execution relay KA7, and the locking auxiliary contact of the backward first execution relay KA7 is electrically connected to the forward first execution relay KA6, forming an execution branch; the backward operation button YK7 is electrically connected to the locking auxiliary contact of the forward first execution relay KA6, and the forward first execution relay K The locking auxiliary contact of A6 is electrically connected to the first backward execution relay KA7 to form an execution branch; the left running operation button YK8 is electrically connected to the locking auxiliary contact of the first right running execution relay KA9, and the locking auxiliary contact of the first right running execution relay KA9 is electrically connected to the first left running execution relay KA8 to form an execution branch; the right running operation button YK9 is electrically connected to the locking auxiliary contact of the first left running execution relay KA8, and the locking auxiliary contact of the first left running execution relay KA8 is electrically connected to the first right running execution relay KA9 to form an execution branch.

[0025] Each execution branch corresponds to each other, for example, one is for raising the hook and the other is for lowering the hook, one is for opening and the other is for closing, one is for moving forward and the other is for moving backward, one is for moving left and the other is for moving right. When the lifting hook YK2 is pressed, KA2 is energized, and its corresponding auxiliary contact KA2 is disconnected. At this time, if YK3 is pressed to raise the hook, the circuit will not act, thus avoiding the problem of raising the hook and lowering the hook at the same time, that is, avoiding the problem of the same motor rotating forward and reverse at the same time, and the operation is more organized and sequential. For the two opposite actions (reversible), only one motor drive is set on site, and the control circuit controls the two different phase contactors of the main circuit (through phase adjustment) by controlling the auxiliary contacts of the open and closed relays to achieve the control purpose.

[0026] The execution circuit also includes a plurality of execution main circuits connected in parallel between the positive power line and the negative power line. The execution main circuit includes a main power closing button, an opening button, and a second execution relay connected in series in sequence from the positive power line to the negative power line. The main power closing button is connected in parallel with the self-holding auxiliary contact of the second execution relay, that is, the main power closing button YK1 is connected in series with the opening button YK0, the opening button YK0 is connected in series with the second execution relay KA1, and the main power closing button YK1 is connected in parallel with the self-holding auxiliary contact KA1 of the second execution relay. In actual control operation, after pressing the main power closing button, all power supply circuits are kept normal through the self-holding auxiliary node. The purpose of self-holding is to avoid pressing the main power closing button by hand all the time; when the power needs to be disconnected, the main power can be disconnected by pressing the circuit's total opening button YK0 to disconnect its normally closed node.

[0027] The wireless receiver transmitting unit is provided with control buttons for transmitting multiple control signals according to the control function. The number of control buttons is set according to actual needs. The functions of the control buttons in this embodiment correspond to rise, fall, open, close, front, back, left, right, etc. The wireless receiver receiving unit is wired to the execution circuit in the on-site control cabinet. The wireless receiver receiving unit is provided with a receiver relay, a frequency conversion contact chip circuit board, a wiring cable and a receiving antenna, that is, the wiring cable is connected to the execution circuit, and multiple receiver relays are set and correspond to each control function one by one. The specific connection relationship and connection principle of the wireless receiver receiving unit adopt the existing method and will not be repeated here.

[0028] The wireless receiver transmitting unit is equipped with a button frequency conversion chip circuit board, a control button and a transmitting antenna. The control button signal is connected to the button frequency conversion chip circuit board, and the transmitting antenna signal is connected to the button frequency conversion chip circuit board. The specific connection method of the transmitting antenna and the button frequency conversion chip circuit board is as follows: Figure 4As shown, to put it simply, the transistor controls the base voltage to turn on the transistor, and when the collector is at a high potential, the function is converted into a frequency signal and transmitted. After multiple circuits are integrated, different frequencies are transmitted. The wireless receiver transmitting unit and the wireless receiver receiving unit include a rectangular shell, and the transmitting antenna is located on the top of the shell.

[0029] The specific implementation process is as follows:

[0030] This embodiment uses wireless access to the original control loop to solve the remote control problem. A wireless signal transmitter is set up to transmit the control signal to a wireless receiver installed on the local control box through a wireless frequency. The wireless receiver installed on the local control box receives the control signal of the wireless control transmitter internally, and converts the received signal into a corresponding control output signal. The signal directly outputs the internal relay of the wireless receiver, and the node signal output by the relay is incorporated into the control loop on site to achieve the purpose of wireless control of the electric hoist. Design the control loop on site; design the relay layout of the wireless receiver. Design a switch quantity wireless transmitter to simultaneously connect the response made by the photoreceiver circuit, that is, the output signal, to the wireless transmitter installed on the receiving end. The wireless transmitter pushes the alarm signal to the control room or the IoT QR code to meet the remote alarm.

[0031] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A wireless remote control device for a crane grab bucket, characterized in that: It includes a field control cabinet located around the vehicle, a wireless receiver transmitting unit for sending control signals to the field control cabinet, and a wireless receiver receiving unit for wirelessly receiving control signals; The field control cabinet is provided with an execution circuit for executing multiple control functions on the crane grab bucket; The wireless receiver transmitting unit is provided with a control button that transmits a plurality of control signals according to the control function; The wireless receiver receiving unit is wired to the execution circuit in the field control cabinet.

2. The wireless remote control device for a crane grab bucket according to claim 1, characterized in that: The wireless receiver transmitting unit is provided with a button frequency conversion chip circuit board, a control button and a transmitting antenna, the control button signal is connected to the button frequency conversion chip circuit board, and the transmitting antenna signal is connected to the button frequency conversion chip circuit board.

3. The wireless remote control device for a crane grab bucket according to claim 2, characterized in that: The wireless receiver receiving unit is provided with a receiver relay, a frequency conversion contact chip circuit board, a wiring cable and a receiving antenna.

4. The wireless remote control device for a crane grab bucket according to claim 3, characterized in that: The execution circuit includes multiple grab bucket execution branches connected in parallel between the positive power line and the negative power line to perform the functions of raising and lowering the hook, opening and closing, moving forward and backward, and running left and right. The execution branches correspond to the control functions one by one. The execution branches include switches connected in series in sequence from the positive power line to the negative power line, the normally open contacts of the receiver relay, and the first execution relay.

5. The wireless remote control device for a crane grab bucket according to claim 4, characterized in that: The execution circuit also includes a plurality of execution main circuits connected in parallel between the positive power line and the negative power line, and the execution main circuit includes a main power closing button, an opening button and a second execution relay connected in series in sequence from the positive power line to the negative power line, and the main power closing button is connected in parallel with the self-holding auxiliary contacts of the second execution relay.

6. The wireless remote control device for a driving grab bucket according to any one of claims 2 to 5, characterized in that: The wireless receiver transmitting unit and the wireless receiver receiving unit include a rectangular shell, and the transmitting antennas are both located on the top of the shell.

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