Cable reel active arm anti-slip system

Abstract

The utility model discloses a cable take -up frame initiative arm prevent downslide system, including brake power, brake power converts commercial power into pulse direct current, and brake power is connected with the motor of cable take -up frame, control module, control module controls the operation of motor, and before the rotation of control motor's rotor, control transformer's pulse direct current acts on the stator of motor, and the stator winding of pulse direct current that acts on the motor of cable take -up frame forms stationary electric field, the utility model discloses through setting brake power, adds direct current voltage at the motor stator both ends of cable take -up frame, makes the motor inside produce a stationary magnetic field, when the rotor of motor rotates, cuts the magnetic force line and produces induced current, and this current and stationary magnetic field interact and produce the braking torque opposite with the rotation direction of rotor, and the braking torque acts on the motor rotor, and through the torque amplification of reduction gearbox and acts on the screw rod, fundamentally solves the initiative arm downslide problem.

Description

Technical Field

[0001] This utility model relates to the field of cable reel technology, and in particular to an anti-slip system for the active arm of a cable reel. Background Technology

[0002] Background technology: Cable production equipment uses a special take-up and release frame for take-up and release. In order to ensure smooth take-up and release, the cable reel needs to be raised to a certain height for production rotation.

[0003] Defects and shortcomings of existing technology:

[0004] The semi-finished cable is quite heavy. After a long period of operation, the gap between the lead screw and sleeve of the take-up frame gradually increases (the main motor and gearbox on the take-up frame are more prone to wear due to their weight). The damping that maintains the position of the cable reel decreases. After long-term operation, the take-up frame often slips down, causing the entire production line to malfunction or resulting in quality accidents. Summary of the Invention

[0005] This invention primarily addresses the problem of cable retractor arm slipping down in existing technologies; it provides a cable retractor arm anti-slipping system that is low-cost and, by comprehensively balancing energy consumption and braking system, effectively solves the damping descent problem and prevents the cable retractor arm from slipping down.

[0006] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a cable reel active arm anti-slip system, including a braking power supply, which converts mains power into pulsed DC power and is connected to the motor of the cable reel; a control module, which controls the operation of the motor and controls the pulsed DC power of the transformer to act on the stator of the motor before controlling the rotor of the motor to rotate, and the pulsed DC power acts on the stator winding of the motor of the cable reel to form a static electric field.

[0007] Preferably, the system also includes a switching unit, through which the braking power supply is connected to the mains power.

[0008] Preferably, the system also includes an AC contactor, wherein the braking power supply is connected to the first end of the AC contactor, the second end of the AC contactor is connected to the motor, and the control end of the AC contactor is connected to the control module.

[0009] Preferably, a first time relay is also included, which is used for delayed starting of the motor.

[0010] Preferably, a second time relay is also included, which is used for delayed power supply to the braking power supply and the motor after the motor stops running.

[0011] Preferably, the braking power supply includes a transformer and a rectifier module, wherein the transformer is connected to the mains power and the rectifier module is connected to the transformer.

[0012] Preferably, the transformer is mounted vertically on the cable reel.

[0013] Preferably, the rectifier module is provided with thermal grease.

[0014] The beneficial effects of this utility model are as follows: By setting a braking power supply, a DC voltage is added to both ends of the motor stator of the cable retractor, so that a static magnetic field is generated inside the motor. When the motor rotor rotates, it cuts the magnetic lines of force to generate an induced current. This current and the static magnetic field interact to generate a braking torque opposite to the direction of rotor rotation. The braking torque acts on the motor rotor, and after being amplified by the gearbox, it acts on the lead screw, which fundamentally solves the problem of the active arm slipping. Compared with directly replacing or improving the active arm, this utility model has low cost and good effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the control circuit of the control module in an embodiment of this utility model. Detailed Implementation

[0016] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0017] Example:

[0018] Traditional solutions to address the slippage of the cable reel's drive arm typically employ one of two approaches. The first is to replace the drive arm's lifting screw and sleeve. This solution requires custom-made screws and sleeves of the same specifications, which is time-consuming, costly, and requires periodic replacement. The second solution is to increase the reduction ratio of the lifting motor's gearbox. This solution effectively addresses the reduced damping issue, but a higher reduction ratio increases the time required for the cable reel to be loaded and unloaded, reducing production efficiency. Furthermore, custom-installing a gearbox with a higher reduction ratio and matching screw and sleeve is also costly.

[0019] Based on this, this utility model proposes an anti-slip system for the active arm of a cable reel, including a braking power supply, a control module, a switching unit, an AC contactor, a first time relay, and a second time relay. The braking power supply converts mains power into pulsed DC power. The control module controls the operation of the motor and, before controlling the rotor rotation of the motor, controls the pulsed DC power from the transformer to act on the stator of the motor. The pulsed DC power acts on the stator windings of the motor of the cable reel to form a static electric field. The switching unit and the AC contactor both serve as energizing switches. The first and second time relays are used for delay. The first time relay is used for delayed motor start-up, and the second time relay is used for delayed energization of the braking power supply and the motor after the motor stops running.

[0020] The braking power supply includes a transformer and a rectifier module. The transformer is connected to one end of a switching unit, and the other end of the switching unit is connected to the mains power. The input terminal of the rectifier module is connected to the transformer. The output terminal of the rectifier module is connected to the first terminal of an AC contactor, the second terminal of the AC contactor is connected to the motor, and the control terminal of the AC contactor is connected to a control module.

[0021] To reduce magnetic field interference, the transformer is installed vertically on the cable reel during installation. At the same time, thermal grease is applied to the rectifier module to facilitate heat dissipation.

[0022] like Figure 1 The diagram shows the motor control and energy-saving braking control circuit of the control module. Through commands transmitted from the host computer, KA1 is the up control switch and KA2 is the down control switch. When down control is performed, the down control switch KA2, AC contactor KM4, and motor switch KM2 are closed via command transmission. Due to the delay of the second time relay KT2, the down control switch KA2 and motor switch KM2 close a certain period after AC contactor KM4 closes, ensuring that the stator is energized and forms a magnetic field before the motor rotor rotates. Similarly, the same operation is performed when up control is performed.

[0023] Specifically, this invention takes a 220V phase voltage, isolates it with a transformer, and steps it down to 12-24V. This voltage is then rectified by a bridge rectifier to obtain corresponding pulsed DC power for use in the motor's stator windings. The control module circuit takes the master command from the PLC's active boom lifting motor's switching output. In addition to the existing lifting limit interlock, an interlock for energy-saving braking and motor operation is added. Due to residual magnetism in the motor, arcing between contactor contacts, and slight delays, time relays are used to isolate the energy-saving braking and motor operation states in time, ensuring that the stator is energized to form a magnetic field before the motor rotor rotates.

[0024] The control module of this invention adopts a modular installation, reducing input and output and facilitating debugging and inspection. Vertical transformer mounting reduces magnetic field interference, and the bridge rectifier module incorporates passive heat dissipation with thermal grease to improve heat dissipation.

[0025] During operation, the main circuit was first debugged. After the braking function was implemented, the input voltage was continuously reduced until it just met the target and had a slight redundancy. Next, the control circuit was debugged. After the command test showed no errors, the delay times of the two time relays were adjusted. Upon issuing the lifting command, the DC power was immediately disconnected, and the motor started after a 0.4-second delay. After the motor stopped, the windings were reconnected to DC power after a 1.5-second delay. After the system ran for one hour, the temperatures of the bridge rectifier and transformer were checked. No significant temperature rise was observed, completing the debugging process.

[0026] This invention solves the problem of the drive arm slipping by setting up a braking power supply and adding DC voltage to both ends of the motor stator of the cable retractor. This generates a stationary magnetic field inside the motor. When the motor rotor rotates, it cuts the magnetic lines of force, generating an induced current. This current and the stationary magnetic field interact to produce a braking torque in the opposite direction to the rotor's rotation. The braking torque acts on the motor rotor and is amplified by the gearbox to act on the lead screw. This fundamentally solves the problem of the drive arm slipping. Compared with directly replacing or improving the drive arm, this invention is low in cost and effective.

[0027] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A cable retractor active arm anti-slip system, characterized in that, include: A braking power supply converts mains power into pulsed DC power and is connected to the motor of the cable take-up frame; a control module controls the operation of the motor and, before controlling the rotor of the motor to rotate, controls the pulsed DC power of the transformer to act on the stator of the motor, and the pulsed DC power acts on the stator windings of the motor of the cable take-up frame to form a static electric field.

2. The cable reel active arm anti-slip system according to claim 1, characterized in that, It also includes a switching unit, through which the braking power supply is connected to the mains power.

3. The cable reel active arm anti-slip system according to claim 1, characterized in that, It also includes an AC contactor, the braking power supply is connected to the first end of the AC contactor, the second end of the AC contactor is connected to the motor, and the control end of the AC contactor is connected to the control module.

4. A cable reel active arm anti-slip system according to claim 1, 2, or 3, characterized in that, It also includes a first time relay, which is used for delayed starting of the motor.

5. The cable retractor active arm anti-slip system according to claim 1, characterized in that, It also includes a second time relay, which is used to delay the connection between the braking power supply and the motor after the motor stops running.

6. The cable reel active arm anti-slip system according to claim 1, characterized in that, The braking power supply includes a transformer and a rectifier module. The transformer is connected to the mains power, and the rectifier module is connected to the transformer.

7. The cable reel active arm anti-slip system according to claim 1, characterized in that, The transformer is mounted vertically on the cable take-up rack.

8. The cable reel active arm anti-slip system according to claim 6, characterized in that, The rectifier module is equipped with thermal grease.

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