Wireless control-based power supply safety control circuit for ground slide car track

Abstract

The utility model discloses a ground slide rail power supply safety control circuit based on wireless control, including main circuit and wireless control circuit, wireless control circuit includes transmitting end and receiving end, when user sends the control signal of advancing or retreating with transmitting end, the track that contacts with ground slide in main circuit can be electrified, at this moment, the power receiving slide block of ground slide is connected to the input of step -up transformer, and the output of step -up transformer is connected to the normally closed contact of emergency stop circuit breaker, and the normally closed contact of emergency stop circuit breaker is connected to three -phase asynchronous motor through cable, realizes the rotation or reverse rotation of three -phase asynchronous motor. Only when ground slide runs, the electrification of track is carried out, reduces the no -load energy consumption, and installs microwave radar sensing device at the front and rear of ground slide, prevents the collision in the process of advancing.

Description

Technical Field

[0001] This utility model relates to the field of industrial transportation equipment technology, and in particular to a safety control circuit for the power supply of a ground slide track based on wireless control. Background Technology

[0002] In the process of steel coil production and transfer, ground-mounted trolleys are commonly used to move the coils from one location to another. However, existing ground-mounted trolleys operate by stepping down a three-phase 380V AC power supply to 30V via a step-down transformer. This 30V power is then directly connected to parallel rails laid on the ground. The trolley, through a energized slider, contacts the rails to connect the stepped-down 30V power to the input of a step-up transformer, boosting the voltage to 380V. This 380V power is then connected to the upper end of a contactor. The trolley contains a control box, using a wired handle to control the contactor and move the trolley forward and backward. With this control method, the rails are constantly energized. Although the voltage is safe, this poses a risk of electric shock. Furthermore, the ground-mounted trolley operates intermittently, with daily working hours not exceeding 3 hours. The step-up and step-down transformers and rails remain energized for extended periods, increasing no-load losses and wasting energy. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a wireless control circuit for the power supply of a ground slide rail, which only powers the rail when the ground slide is running, reducing energy consumption when not in use, and installs microwave radar sensing devices at both ends of the ground slide to prevent collisions during operation.

[0004] To achieve the above objectives, this utility model provides a wireless control-based power safety control circuit for a ground scooter track, comprising: a main circuit and a wireless control circuit; the main circuit includes a circuit breaker, normally open contacts of a positive / reverse contactor, a thermal relay and a step-down transformer connected in sequence to a three-phase 380V power supply, the output terminal of which is connected to a parallel rail laid on the ground via a wire; It also includes a power receiving slider of the ground slide and a step-up transformer; the power receiving slider of the ground slide is connected to the input terminal of the step-up transformer, the output terminal of the step-up transformer is connected to the normally closed contact of the emergency stop circuit breaker, and the normally closed contact of the emergency stop circuit breaker is connected to a three-phase asynchronous motor through a cable; The wireless control circuit includes a transmitter and a receiver; the transmitter and receiver use 433MHz wireless communication, and the transmitter includes a first main control chip, multiple remote control buttons and a 433MHz wireless transmission module. The receiving end is connected to a power supply circuit, and includes a second main control chip and a 433 wireless receiving module; the output end of the second main control chip is connected to a driver chip, and the output end of the driver chip is respectively connected to a start relay coil, a forward relay coil, and a reverse relay coil; the other end of the start relay coil, the forward relay coil, and the reverse relay coil is connected to a high level. The power supply circuit includes a main circuit, a forward branch circuit, and a reverse branch circuit; the forward branch circuit and the reverse branch circuit are connected in parallel and then connected in series with the main circuit; the forward branch circuit is provided with a positive contactor coil, and the reverse branch circuit is provided with a reverse contactor coil; when the positive contactor coil is energized, the normally open contact of the positive contactor is closed, and when the reverse contactor coil is energized, the normally open contact of the reverse contactor is closed.

[0005] More preferably, the main circuit of the power supply circuit includes a fuse and one end of a normally open contact of a starting relay connected in sequence; the other end of the normally open contact of the starting relay is connected to the positive branch circuit. The forward branch includes a normally open contact of a forward relay and a coil of a forward contactor connected in sequence; the reverse branch includes a normally open contact of a reverse relay and a coil of a reverse contactor connected in sequence to the other end of a normally open contact of a starting relay.

[0006] Further preferably, it also includes a radar alarm module; the radar alarm module includes a front microwave radar installed at the front end of the ground skid and a rear microwave radar installed at the rear end of the ground skid; the signal output terminals of the front microwave radar and the rear microwave radar are respectively connected to the signal input terminals of the second main control chip, the signal output terminal of the second main control chip is also connected to a driver, and the output terminal of the driver is connected to the coil of the emergency stop circuit breaker.

[0007] More preferably, both the first and second main control chips are STM32F103C8T6 series chips.

[0008] More preferably, the 433 wireless transmitter module and the 433 wireless receiver module are of model CMT2300.

[0009] More preferably, there are at least two driving chips, and the two driving chips are respectively connected to the start relay coil, the forward relay coil and the reverse relay coil.

[0010] More preferably, the driver chip is model ULN2380.

[0011] More preferably, the second main control chip is also connected to a power supply linkage alarm module, which is an audible and visual alarm, and the audible and visual alarm is connected to a signal output pin of the second main control chip.

[0012] The wirelessly controlled track power safety control circuit disclosed in this application changes the traditional continuous-powered nature of scooters by adopting an on-demand power supply method, thus avoiding energy consumption. It forms a dual active safety barrier by setting up two protection modes: microwave lightning avoidance and power supply-linked alarm. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the power supply safety control circuit for the wireless-controlled trolley track according to this utility model.

[0014] Figure 2 This is a schematic diagram of the main circuit in this utility model.

[0015] Figure 3 This is a schematic diagram of the wireless control circuit in this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of the second main control chip in this utility model.

[0017] Figure 5 This is a schematic diagram of the power supply circuit in this utility model. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] like Figure 1 As shown, one embodiment of this utility model provides a wirelessly controlled safety control circuit for the power supply of a scooter track, comprising: a main circuit and a wireless control circuit; as shown... Figure 2 As shown, the main circuit includes a circuit breaker QF, a positive contactor KM1 / reverse contactor KM2, a thermal relay FR, and a step-down transformer TR1 connected in sequence to a three-phase 380V power supply. The output terminal of the step-down transformer TR1 is connected to a parallel rail laid on the ground through a wire. It should be noted that the circuit breaker QF here is connected to the contacts of the positive contactor KM1 and the negative contactor KM2. The contacts of the positive contactor KM1 and the negative contactor KM2 are connected in parallel. When the coil of the positive contactor KM1 is energized, the contacts of the positive contactor are connected. At this time, the three-phase 380V power supply flows through the circuit breaker QF, the positive contactor KM1, and the thermal relay FR into the step-down transformer TR1 in sequence. After being converted into 30V low voltage by the step-down transformer, it is introduced into the parallel rail.

[0020] At this time, the parallel rails carry 30V low-voltage electricity. The ground slide car uses the power receiving slider to obtain the 30V low-voltage electricity, and then uses the step-up transformer to convert the 30V low-voltage electricity to 380V. The power receiving slider of the ground slide car is connected to the input terminal of the step-up transformer TR2, and the output terminal of the step-up transformer is connected to the normally closed contact of the emergency stop circuit breaker. The normally closed contact of the emergency stop circuit breaker is connected to the three-phase asynchronous motor through a cable. like Figure 3 As shown, the wireless control circuit includes a transmitter and a receiver. The transmitter and receiver communicate wirelessly via 433MHz. The transmitter includes a first main control chip, multiple remote control buttons, and a 433MHz wireless transmission module. The multiple remote control buttons include a forward button, a backward button, a power button, and a stop button. Each button is independently connected to an input pin of the first main control chip. When the user uses the forward and backward buttons to control the scooter to move forward or backward, the control command is acquired by the first main control chip and sent to the 433MHz wireless transmission module, which then uses 433MHz radio frequency communication to send the control signal to the receiver.

[0021] like Figure 4 As shown, the receiving end is connected to a power supply circuit and includes a second main control chip and a 433 wireless receiving module. The output end of the second main control chip is connected to a driver chip, and the output end of the driver chip is respectively connected to a start relay coil, a forward relay coil, and a reverse relay coil. The other ends of the start relay coil, the forward relay coil, and the reverse relay coil are connected to a high level. Preferably, at least two driver chips are provided, and the two driver chips are respectively connected to the start relay coil, the forward relay coil, and the reverse relay coil. The model of the driver chip is ULN2380.

[0022] Each driver chip in the diagram, U3-U4, can generate two outputs. For example, U3 uses output pins OUT4 and OUT8 to output two drive signals respectively. Pin OUT4 drives the coil of start relay K1. When the user presses the start button, the start relay coil is energized and closes. Pin OUT8 drives the coil of forward relay K2. When the user presses the forward button, the forward relay K2 coil is energized and K2 closes. Similarly, the output pins of U4 drive the reverse relay K3. When the coil of K3 is energized, the normally open contact of K3 closes.

[0023] like Figure 5 As shown, the power supply circuit includes a main circuit, a forward branch circuit, and a reverse branch circuit; the main circuit includes a fuse FU and one end of a normally open contact of a starting relay K1 connected in sequence; the other end of the normally open contact of the starting relay K1 is connected in sequence to a normally open contact of a forward relay K2 and a coil KM1 of a positive contactor; The reverse branch is connected in parallel with the forward branch. The reverse branch includes the normally open contact of the reverse relay K3 and the coil KM2 of the reverse contactor, which are connected in sequence to the other end of the normally open contact of the starting relay. It should be noted that this application also incorporates a self-locking design, that is, the normally closed contact of the reverse contactor is connected in series in the forward branch, and the normally closed contact of the forward contactor is connected in series in the reverse branch. When moving in the forward direction, the normally open contact of the forward contactor closes and the normally closed contact opens, preventing the reverse branch from being energized.

[0024] Both the first and second main control chips use the STM32F103C8T6 series chips. The 433 wireless transmitter and receiver modules are model CMT2300. The 433 wireless transmitter and receiver modules communicate with the main control chips via an SPI interface.

[0025] More preferably, the second main control chip is also connected to a power supply linkage alarm module, which is an audible and visual alarm, and the audible and visual alarm is connected to a signal output pin of the second main control chip.

[0026] In this application, when the scooter needs to operate, the user first needs to press a remote control button on the wireless transmitter. This remote control button includes a start button, a forward button, and a reverse button. The signal input terminals of the first main control chip are connected to the start button, forward button, and reverse button, respectively. After the start button is pressed, it automatically locks. Then, pressing the forward or reverse button controls the scooter's movement. Taking pressing the forward button as an example, when the forward button is pressed, if the input pins of the first main control chip connected to the forward button and the input pins connected to the start button detect valid signals, the first main control chip uses the 433 wireless transmitter module to transmit signals to the start button. When the receiving end 433 wireless receiving module receives this signal, it sends the received signal to the second main control chip. The second main control chip controls the starting relay coil and the forward relay coil to be energized through the driver chip. When the starting relay coil and the forward relay coil are energized, the normally open contacts of the starting relay and the forward relay are closed. At this time, the forward branch is connected, the coil of the forward contactor is energized, the forward contactor is closed, and the main circuit is connected. The three-phase 380V power supply flows into the step-down transformer in sequence through the circuit breaker, the forward contactor, and the thermal relay. Then, it is converted into 30V low voltage electricity by the step-down transformer and introduced into the parallel rail.

[0027] At this time, the parallel rails carry 30V low-voltage electricity. The ground slide car uses a receiving slider to obtain the 30V low-voltage electricity and then uses a step-up transformer to convert the 30V low-voltage electricity into high voltage. The receiving slider of the ground slide car is connected to the input end of the step-up transformer, and the output end of the step-up transformer is connected to the normally closed contact of the emergency stop circuit breaker. The normally closed contact of the emergency stop circuit breaker is connected to the three-phase asynchronous motor through a cable. Under normal circumstances, the emergency stop circuit breaker is closed, and the three-phase asynchronous motor of the ground slide car moves in the forward direction. When it is necessary to reverse, the process is similar to the above, except that when the reverse button is pressed, the forward contactor is disconnected and the reverse contactor is connected, changing the phase sequence of the three-phase 380V power supply. Therefore, the phase sequence of the three-phase asynchronous motor of the ground slide car also changes accordingly, thus realizing the reverse movement of the ground slide car.

[0028] It should be noted that this application also includes a radar alarm module; the radar alarm module includes a front microwave radar installed at the front of the scooter and a rear microwave radar installed at the rear of the scooter; the signal output terminals of the front microwave radar and the rear microwave radar are respectively connected to the signal input terminal of the second main control chip, the signal output terminal of the second main control chip is also connected to the driver, and the output terminal of the driver is connected to the coil of the emergency stop relay K4.

[0029] When the current or rear microwave radar detects an obstacle, it sends a detection signal to the signal input terminal of the second main control chip. The second main control chip then controls the coil of the emergency stop circuit breaker to be energized via a driver. The emergency stop relay is a normally open relay, which closes after its coil is energized. One end of the coil of the emergency stop circuit breaker KA1 is connected to the L line and the other end is connected to the N line. At this time, the coil of the emergency stop circuit breaker KA1 is energized, and the three-phase asynchronous motor of the scooter stops rotating. The coil of the emergency stop circuit breaker KA1 is also connected in parallel with an audible and visual alarm light to output an alarm.

[0030] In addition, this application provides another protection method: the second main control chip is also connected to a power supply linkage alarm module, which uses an audible and visual alarm. The audible and visual alarm is connected to a signal output pin of the second main control chip. When the second main control chip detects a start signal sent via wireless communication, the audible and visual alarm sounds, indicating that the track is energized and prompting personnel near the track to evacuate. This method is a commonly used alarm method and is not shown in the diagram; it can be implemented using existing technology.

[0031] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A wirelessly controlled safety control circuit for the power supply of a scooter track, characterized in that, include: The main circuit and wireless control circuit; the main circuit includes a circuit breaker, normally open contacts of a positive / reverse contactor, a thermal relay and a step-down transformer connected in sequence on a 380V three-phase power supply, and the output terminal of the step-down transformer is connected to a parallel rail laid on the ground through a wire; It also includes a power receiving slider of the ground slide and a step-up transformer; the power receiving slider of the ground slide is connected to the input terminal of the step-up transformer, the output terminal of the step-up transformer is connected to the normally closed contact of the emergency stop circuit breaker, and the normally closed contact of the emergency stop circuit breaker is connected to a three-phase asynchronous motor through a cable; The wireless control circuit includes a transmitter and a receiver; the transmitter and receiver use 433MHz wireless communication, and the transmitter includes a first main control chip, multiple remote control buttons and a 433MHz wireless transmission module. The receiving end is connected to a power supply circuit, and includes a second main control chip and a 433 wireless receiving module; the output end of the second main control chip is connected to a driver chip, and the output end of the driver chip is respectively connected to a start relay coil, a forward relay coil, and a reverse relay coil; the other end of the start relay coil, the forward relay coil, and the reverse relay coil is connected to a high level. The power supply circuit includes a main circuit, a forward branch circuit, and a reverse branch circuit; the forward branch circuit and the reverse branch circuit are connected in parallel and then connected in series with the main circuit; the forward branch circuit is provided with a positive contactor coil, and the reverse branch circuit is provided with a reverse contactor coil; when the positive contactor coil is energized, the normally open contact of the positive contactor is closed, and when the reverse contactor coil is energized, the normally open contact of the reverse contactor is closed.

2. The wireless control-based track power safety control circuit for a ground scooter as described in claim 1, characterized in that, The main circuit includes a fuse and one end of a normally open contact of a starting relay connected in sequence; the other end of the normally open contact of the starting relay is connected to the forward branch circuit. The forward branch includes a normally open contact of a forward relay and a coil of a forward contactor connected in sequence; the reverse branch includes a normally open contact of a reverse relay and a coil of a reverse contactor connected in sequence to the other end of a normally open contact of a starting relay.

3. The wireless control-based power supply safety control circuit for a ground scooter track according to claim 1, characterized in that, It also includes a radar alarm module; the radar alarm module includes a front microwave radar installed at the front of the ground skid and a rear microwave radar installed at the rear of the ground skid; the signal output terminals of the front microwave radar and the rear microwave radar are respectively connected to the signal input terminal of the second main control chip, the signal output terminal of the second main control chip is also connected to the driver, and the output terminal of the driver is connected to the coil of the emergency stop circuit breaker.

4. The wireless control-based track power safety control circuit for a ground scooter as described in claim 1, characterized in that, Both the first and second main control chips use the STM32F103C8T6 series chips.

5. The wireless control-based power supply safety control circuit for a ground scooter track according to claim 1, characterized in that, The 433 wireless transmitter module and the 433 wireless receiver module are model CMT2300.

6. The wirelessly controlled track power safety control circuit for a ground scooter as described in claim 1, characterized in that, The driving chip is provided with at least two chips, and the two driving chips are respectively connected to the start relay coil, the forward relay coil and the reverse relay coil.

7. The wireless control-based power supply safety control circuit for a ground scooter track according to claim 1, characterized in that, The driver chip is model ULN2380.

8. The wireless control-based power supply safety control circuit for a ground scooter track according to claim 1, characterized in that, The second main control chip is also connected to a power supply linkage alarm module, which uses an audible and visual alarm. The audible and visual alarm is connected to a signal output pin of the second main control chip.

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