Power-off synchronization circuit of steel cord double twist machine DFM large machine and small machine with down-twist DOF

Abstract

A power-off synchronization circuit for a large steel cord double-twist machine DFM and a small machine with a lower take-up DOF, including a mains power supply, a first user interface connected to the mains power supply, and a drive board, the first user interface is connected to the upper take-up, cradle flipping, and lower take-up equipment; the drive board is provided with an energy recovery interface connected to the motor, for receiving the regenerated electric energy generated when the motor stops; the power output end of the drive board includes a power output terminal 1 for outputting AC 380V power, and a power output terminal 2 for outputting DC 24V power, the power output terminal 1 outputs AC380V power to the second user interface; a contactor is provided between the first user interface and the mains power supply, and between the second user interface and the power output terminal 1 of the drive board, the contactor uses a DC24V contactor, and is connected to the DC24V power supply. The utility model can achieve the effect of synchronous shutdown of the cradle flipping and the lower take-up, and then the take-up reel does not fall apart.

Description

Technical Field

[0001] The utility model relates to the technical field of control circuits for steel cord production equipment, in particular to a power-off synchronization circuit for a large steel cord double-twisting machine DFM and a small machine with a down-twisting DOF. Background Art

[0002] Steel cord is a steel rope with a diameter of 1.5-3mm, made by twisting multiple strands of high-carbon copper-plated steel wire with a diameter of 0.13-0.33mm. The machine used to twist the steel wires into rope is called a stranding machine. Double-twist machines are essential for double-twisting fine filaments in the steel cord industry. Pirelli double-twist machines have two upper flywheel assemblies, mounted on two flywheel shafts at either end of the cradle. The flywheel shafts are mounted in bearing blocks, which contain bearings. During operation, the flywheel and flywheel shaft rotate together at high speed.

[0003] Existing large DFM machines and small DOF-TUX machines (DOF machines with a bottom take-up mechanism) use power lines from the integrated machine to power the upper take-up motor, the tilting motor, and the lower take-up motor. Contactors are installed between the lines and each motor, switching power to each motor through three contactors. The coils of the three contactors are powered by a 220V power supply, which is converted from a 380V to 220V transformer within the integrated machine. In the event of a sudden power outage, the contactors immediately lose power, shutting down the take-up motor. The take-up spool will then suddenly stop, causing the wire to be unwound. This affects product quality and requires manual work to reel the wire, impacting product profitability. Utility Model Content

[0004] In response to the above technical problems, this technical solution provides a power-off synchronization circuit for a large steel cord double-twist machine DFM and a small machine with a lower take-up DOF, which converts the four contactors of the upper take-up, cradle flipping, lower take-up, and fan from the original 220V coil to a contactor with a 24V coil power supply, and recovers and stores the electric energy generated when the motor stops through the drive board. When needed, the DC 24V power supply is output to power the four contactor coils, which can realize the synchronous power-off function and keep the take-up wheel from falling apart; it can effectively solve the above problems.

[0005] The utility model is achieved through the following technical solutions:

[0006] A power-off synchronization circuit for a large steel cord double-twist machine (DFM) and a small machine with a down-takeup device (DOF), comprising a 220V AC mains power supply and a first user interface connected to the 220V AC mains power supply, the first user interface being connected to upper take-up, cradle flipping, and lower take-up equipment. The 220V AC mains power supply is also connected to a drive board, which is provided with an energy recovery interface connected to a motor for receiving regenerated electrical energy generated when the motor stops. The power output end of the drive board includes a first power output terminal for outputting 380V AC power and a second power output terminal for outputting 24V DC power. The first power output terminal outputs 380V AC power to the second user interface connected to the upper take-up, cradle flipping, and lower take-up equipment. Contactors are provided between the first user interface and the 220V AC mains power supply, and between the second user interface and the first power output terminal of the drive board. The contactors are DC 24V contactors and are connected to the DC 24V power supply.

[0007] Furthermore, the AC 220V mains power supply is connected to a guide rail fuse device and a transformer. After the AC 220V mains power supply is upgraded to AC 380V voltage by the transformer, it is connected to the first user interface connected to the drive board, upper take-up, cradle flip, and lower take-up equipment.

[0008] Furthermore, air switches QF1 and QF2 are provided between the AC 220V power supply and the first user interface.

[0009] Furthermore, the second power output terminal 24V2 and GND2 of the output DC 24V power supply are connected to a relay KA1 for controlling the switching of the down-line take-up contactor, and a relay KA2 for controlling the switching of the cradle flip contactor.

[0010] Furthermore, the power recovery interface of the driving board is connected to a power board, which converts the electric energy into DC 24V and AC 380V power and then connects to the driving board; and is connected to the device through the output interface of the driving board.

[0011] Furthermore, the driver board is also equipped with an energy conversion circuit composed of multiple braking resistors. When the regenerative energy generated by the motor suddenly stops is too large to be immediately recovered by the power board, the excess energy is converted into heat energy by the energy conversion circuit, thus protecting the driver board and the power board.

[0012] Furthermore, the signal input end of the driving board is connected to the controller through an interface; the controller is connected to a plurality of button switches and knob switches for controlling the start or stop of the upper wire taking-up, cradle flipping, and lower wire taking-up equipment.

[0013] Furthermore, the controller is also connected to a thermal overload relay and a display screen via a data line.

[0014] Furthermore, the controller and the driver board are both connected to a cooling fan, and the cooling fan is connected to a DC 24V power supply. Beneficial effects

[0015] The five-span special-shaped beam-arch composite structure bridge proposed in this utility model has the following beneficial effects compared with the prior art:

[0016] The utility model converts the four contactors of upper take-up, cradle flipping, lower take-up and fan from the original 220V coil into contactors with coils powered by 24V, and recovers the energy generated in a short period of time when the motor decelerates and stops through the drive board, and stores it in the power supply board; when the power supply of the grid is cut off, the drive board outputs a DC 24V power supply to power the four contactor coils, thereby obtaining a buffered deceleration and stopping time, realizing a controllable shutdown, and realizing a synchronous power-off function, so as to keep the take-up reel from falling apart.

[0017] The utility model cancels the original AC220V power supply for the contactor coils, takes the 24V power supply from the output end of the drive board, and connects it to the relay terminals to supply power to the two cradle flipping and lower take-up contactor coils, so that the output power supply on the drive board is changed to 24V power. In addition, the four control contactor coils are all changed to 24V power control. When the system suddenly loses power, according to the logic of the power-off synchronization control function, the 24V power supply of the take-up contactor coil will be delayed to lose power, and the take-up reel will continue to be powered and slowly stop, achieving the effect of deceleration and synchronous shutdown, and then the take-up reel will not fall apart.

[0018] The utility model simply changes the control circuit by modifying the drive board and the connecting circuit, and can easily implement hardware control. It can realize the power failure synchronization function and ensure that the take-up reel does not fall apart. It can effectively prevent the situation where the take-up reels of large-scale machines fall apart due to sudden power outages, thereby reducing product quality. It greatly reduces the manual processing time caused by the loose reels, while ensuring product quality, greatly reducing the downtime of batch equipment, and increasing product benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the internal circuit diagram of the main circuit of the present invention.

[0020] Figure 2 This is the internal circuit diagram of the driver board in the present invention.

[0021] Figure 3 This is the internal circuit diagram of the control board of the present invention.

[0022] Figure 4 Schematic diagram of the panel button of the present invention.

[0023] Figure 5 This is the internal circuit diagram of the expansion board of the present invention. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Under the premise of not departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in this field to the technical solutions of the present invention should fall within the scope of protection of the present invention. Example

[0025] like Figure 1 As shown, a power-off synchronization circuit for a large steel cord double-twist machine (DFM) and a small machine with a down-takeup DOF includes a 220V AC mains power supply. The live wire of the 220V AC mains power supply is connected to a guide rail fuse device FU and then to a 380-220 50W transformer together with the neutral wire. The 380-220 50W transformer boosts the 220V AC mains power supply to 380V AC. The voltage is then connected to a first user interface connected to a drive board, an upper take-up device, a cradle flipping device, and a lower take-up device. The first user interface is connected to the upper take-up device, the cradle flipping device, and the lower take-up device, serving as the main power source for these devices.

[0026] Air switches QF1 and QF2 are provided between the 380-220 50W transformer and the first user interface. A relay and a thermal overload relay are also provided between the air switch QF2 and the first user interface, which protect the power circuit.

[0027] like Figure 1 and Figure 2 As shown, the AC 220V mains power supply is also connected to the drive board. The drive board is provided with an energy recovery interface connected to the motor, and the energy recovery interface is connected to the power boards DY1 and DY2; it is used to receive the regenerative electric energy generated when the motor stops, and recover the energy generated during the short period of motor deceleration and stop, and store it in the power board. The drive board is also provided with an energy conversion circuit composed of multiple braking resistors. When the regenerative electric energy generated when the motor stops suddenly is too large, making it impossible for the power board to recover the electric energy immediately, the excess electric energy is converted into heat energy by the energy conversion circuit, which protects the drive board and the power board.

[0028] The power board converts electrical energy into DC 24V and AC 380V power, which is connected to the driver board through an interface, and the output interface of the driver board is connected to the device. The power output end of the driver board includes a power output terminal 1 that outputs AC 380V power, and a power output terminal 2 that outputs DC 24V power; the power output terminal 1 outputs AC 380V power to the second user interface connected to the upper wire-winding, cradle flipping, and lower wire-winding equipment; a contactor is provided between the second user interface and the power output terminal 1 of the driver board, and the contactor uses a DC 24V contactor and is connected to a DC 24V power supply. The second user interface is connected to the upper wire-winding, cradle flipping, and lower wire-winding equipment and serves as a backup power source for the upper wire-winding, cradle flipping, and lower wire-winding equipment to supply power to them; when the power grid is out of power, the second user interface is switched to supply power to the upper wire-winding, cradle flipping, and lower wire-winding equipment to prevent the upper wire-winding, cradle flipping, and lower wire-winding equipment from suddenly stopping when the power grid is out of power. The system then controls the contactor through the logic of the power-off synchronization control function (this part is the existing technology, and this solution has not made effective improvements to this part, so it will not be elaborated here). The 24V power supply of the take-up contactor coil will be delayed to lose power, and the take-up wheel will continue to be powered and slowly stop, achieving the effect of deceleration and synchronous shutdown, so that the take-up reel will not fall apart.

[0029] The DC 24V power output terminals 24V2 and GND2 are connected to relays KA1, which controls the switching of the down-winding contactor, and KA2, which controls the switching of the cradle flip contactor. The driver board is also connected to a cooling fan, which is connected to the DC 24V power supply.

[0030] The cooling fan's contactor coil is energized by the machine's start signal. By default, the driver board is powered by the AC 220V mains power supply. The upper take-up, cradle flip, and lower take-up functions are also powered by two wires from the AC 220V mains power supply to the external contactor coil. By default, the upper take-up contactor is energized. When the AC 220V mains power supply fails and the driver board's internal power supply is switched, relays KA1 and KA2 control the lower take-up contactor and the cradle flip contactor, respectively.

[0031] The improvement of this embodiment is that the four 220V contactor coils (cooling fan, upper take-up, cradle flip, lower take-up) connected to the drive board are converted into coils of 24V DC contactor, and the original AC220V power supply for the contactor coils is cancelled. The 24V V2 and GND2 output terminals of the drive board are taken and connected to the relay terminal 5 to supply power to the two cradle flip and lower take-up contactor coils. The power supply for the cooling fan contactor coil is also connected to the 24V V2 and GND2 power supplies to the drive board, so that the output power on the drive board is changed to 24V power.

[0032] The four control contactor coils have all been changed to 24V power supply control. When the system suddenly loses power, according to the logic of the power-off synchronization control function, the 24V power supply of the take-up contactor coil will be delayed to lose power, and the take-up wheel will continue to be powered and slowly stop, achieving the effect of deceleration and synchronous shutdown, so that the take-up reel will not fall apart.

[0033] like Figure 1 and Figure 3 As shown, the signal input end of the driving board is connected to the controller through an interface; the controller is connected to a plurality of button switches and knob switches for controlling the upper winding, cradle flip, and the start or stop of the lower winding device. The settings of each switch button are as follows Figure 4 shown.

[0034] like Figure 3 As shown, the controller is also connected to a thermal overload relay and a display screen via a data line. The controller is also connected to a cooling fan, which is connected to a DC 24V power supply.

[0035] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. All equivalent changes or modifications based on the spirit of the present invention are intended to be covered by the present invention.

Claims

1. A power-off synchronization circuit for a steel cord double twist machine DFM and a small machine with a down-tightening DOF, comprising a mains AC 220V power supply and a first user interface connected to the mains AC 220V power supply, the first user interface being connected to an up-tightening, cradle flipping, and down-tightening device; characterized in that: The AC 220V mains power supply is also connected to a drive board, which is provided with an energy recovery interface connected to a motor for receiving regenerated electric energy generated when the motor stops; the power output end of the drive board includes a power output terminal 1 for outputting an AC 380V power supply, and a power output terminal 2 for outputting a DC 24V power supply, and the power output terminal 1 outputs an AC 380V power supply to a second user interface connected to an upper wire-winding, cradle flipping, and lower wire-winding device; contactors are provided between the first user interface and the AC 220V mains power supply, and between the second user interface and the power output terminal 1 of the drive board, and the contactor uses a DC 24V contactor and is connected to a DC 24V power supply.

2. The power-off synchronization circuit of the steel cord double twist machine DFM large machine and the down-twist machine DOF small machine according to claim 1 is characterized by: The AC 220V mains power supply is connected to a guide rail fuse device and a transformer. After the AC 220V mains power supply is upgraded to an AC 380V voltage by the transformer, it is connected to a first user interface connected to a drive board, an upper take-up, a cradle flip, and a lower take-up device.

3. A power-off synchronization circuit for a steel cord double twist machine DFM large machine and a down-twist machine DOF small machine according to claim 1 or 2, characterized in that: Air switches QF1 and QF2 are also provided between the AC 220V power supply and the first user interface.

4. The power-off synchronization circuit of the steel cord double twist machine DFM large machine and the down-twist machine DOF small machine according to claim 1 is characterized by: The power output terminal 24V2 and GND2 of the output DC 24V power supply are connected to the relay KA1 for controlling the switching of the down-winding contactor, and the relay KA2 for controlling the switching of the cradle flipping contactor.

5. The power-off synchronization circuit of the steel cord double twist machine DFM large machine and the down-twist machine DOF small machine according to claim 1, characterized in that: The power recovery interface of the driving board is connected to a power board, which converts the electric energy into DC24V and AC 380V power and then connects to the driving board; and is connected to the device through the output interface of the driving board.

6. A power-off synchronization circuit for a steel cord double twist machine DFM large machine and a down-twist machine DOF small machine according to claim 1 or 5, characterized in that: The drive board is also provided with an energy conversion circuit composed of multiple braking resistors; when the regenerative electric energy generated when the motor stops suddenly is too large, so that the power board cannot recover the electric energy immediately, the excess electric energy is converted into heat energy by the energy conversion circuit, which protects the drive board and the power board.

7. A power-off synchronization circuit for a steel cord double twist machine DFM large machine and a down-twist machine DOF small machine according to any one of claims 1, 2, 4, and 5, characterized in that: The signal input end of the driving board is connected to the controller through an interface; the controller is connected to a plurality of button switches and knob switches for controlling the start or stop of the upper wire taking-up, cradle flipping, and lower wire taking-up equipment.

8. The power-off synchronization circuit of the steel cord double twist machine DFM large machine and the down-twist machine DOF small machine according to claim 7, characterized in that: The controller is also connected to a thermal overload relay and a display screen via a data line.

9. The power-off synchronization circuit of the steel cord double twist machine DFM large machine and the down-twist machine DOF small machine according to claim 7, characterized in that: The controller and the driving board are both connected with a cooling fan, and the cooling fan is connected with a DC 24V power supply.

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