Improved yarn storage device control circuit

Abstract

The utility model discloses an improved yarn storage device control circuit which comprises a driving circuit and a control circuit, a yarn storage device motor and a silicon controlled rectifier are arranged in the driving circuit, the driving circuit is used for inputting alternating current, and the silicon controlled rectifier is used for controlling the alternating current to supply power to the yarn storage device motor; and a control module is arranged in the control circuit and is electrically connected with the control end of the silicon controlled rectifier through a bidirectional optocoupler. The bidirectional optocoupler can also electrically isolate the control circuit and the drive circuit, so that the safety performance of the improved yarn storage device control circuit is greatly improved in the state process of the yarn storage device motor.

Description

Technical Field

[0001] The utility model relates to the technical field of yarn storage devices, in particular to an improved yarn storage device control circuit. Background Art

[0002] The yarn storage device is an important component of the knitting machine. The yarn storage device mainly includes a shell and a main shaft and a yarn storage drum installed thereon. The yarn storage drum is sleeved with a yarn pressure ring and a tension ring. The main shaft is at the center of the yarn storage drum. The motor drives the yarn storage drum to rotate to store yarn.

[0003] The yarn storage device has multiple working states, which are controlled by a control module. The control module is easily interfered by the AC power supply when controlling the yarn storage device motor, which poses a safety hazard when controlling the working state of the yarn storage device. Summary of the Invention

[0004] The purpose of this application is to provide an improved yarn storage device control circuit with high safety performance.

[0005] The present application discloses an improved yarn storage device control circuit, which includes a drive circuit and a control circuit. A yarn storage device motor and a thyristor are provided in the drive circuit. The drive circuit is used to input alternating current, and the thyristor is used to control the alternating current to power the yarn storage device motor. A control module is provided in the control circuit, and the control module is electrically connected to the control end of the thyristor through a bidirectional optocoupler.

[0006] Optionally, the bidirectional optocoupler includes a power supply interface, an electrical output interface, and a light emission input interface, the power supply interface is used to be electrically connected to an AC power supply, the electrical output interface is electrically connected to the control end of the thyristor, and the light emission input interface is electrically connected to the control module.

[0007] Optionally, the thyristor is used to control the forward and reverse rotation of the yarn storage motor, and the yarn storage motor is a unidirectional rotating motor; if the yarn storage motor can rotate forward, the thyristor controls the reverse rotation of the yarn storage motor to achieve braking; if the yarn storage motor can reverse, the thyristor controls the forward rotation of the yarn storage motor to achieve braking.

[0008] Optionally, the number of the bidirectional optocouplers is two, and each of the bidirectional optocouplers is electrically connected to a control terminal of a thyristor.

[0009] Optionally, the optical emission input interface includes a first interface and a second interface, the control module includes a first pin and a second pin, and the first interface and the second interface are connected to the first pin and the second pin respectively.

[0010] Optionally, the improved yarn storage device control circuit further includes an isolation module arranged between the drive circuit and the control circuit.

[0011] Optionally, the improved yarn storage device control circuit further includes a rectifier and a DCDC module, the input end of the DCDC is connected to an AC power supply through the rectifier, and the output end of the DCDC is used to power the control circuit.

[0012] Optionally, the improved yarn storage device control circuit also includes a first switch, a second switch and a third switch, and the first switch, the second switch and the third switch are electrically connected to the control module respectively; the first switch is used to control the yarn storage device to be turned on or off, the second switch is used to control the yarn breakage of the yarn storage device, and the third switch is used to control whether the yarn storage device turns on the yarn storage detection.

[0013] Optionally, the improved yarn storage device control circuit further includes an alarm module, the alarm module is electrically connected to the control module, and the alarm module is used for alarming;

[0014] The alarm module alarm meets at least one of the following conditions:

[0015] The second switch controls the yarn storage device to break the yarn;

[0016] The yarn storage motor has a yarn blocking time that is greater than or equal to a first preset time;

[0017] The yarn storage device idles for a second preset time and is not fully stocked with yarn.

[0018] Optionally, the improved yarn storage device control circuit further comprises a sensor electrically connected to the control module, and the sensor is used to detect a jump signal of the yarn storage device motor.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. The drive circuit supplies power to the yarn storage motor, and the control circuit controls the state of the yarn storage motor. A bidirectional optocoupler is set between the control circuit and the drive circuit, which can transmit the control signal to the yarn storage motor to control the state of the yarn storage motor. The bidirectional optocoupler can also realize electrical isolation between the control circuit and the drive circuit, so that the safety performance of the improved yarn storage control circuit is greatly improved during the state of the yarn storage motor.

[0021] 2. In the process of controlling the yarn storage motor through the control circuit, the AC power supply supplies power to the yarn storage motor, and the AC power supply supplies power to the bidirectional optocoupler, which controls the state of the yarn storage motor by controlling the state of the thyristor. In the process of controlling the yarn storage motor, the bidirectional optocoupler changes the electrical signal by emitting a light signal to control the thyristor, and the light signal emitted by the bidirectional optocoupler is controlled by the control circuit. Among them, the power supply interface is used to be electrically connected to the AC power supply, the electrical output interface is electrically connected to the control end of the thyristor, the light emission input interface is electrically connected to the control module, and the light emission input interface has no direct electrical connection relationship with the power supply interface and the electrical output interface. Therefore, the use of a bidirectional optocoupler can realize electrical isolation between the drive circuit and the control circuit, which is beneficial to improving the safety performance of the improved yarn storage control circuit.

[0022] 3. The thyristor is used to control the forward and reverse rotation of the yarn storage motor. The thyristor can realize the control of the forward rotation, reverse rotation and braking of the yarn storage motor. In the process of controlling the braking of the yarn storage motor, the thyristor is used to switch the yarn storage motor from forward rotation to reverse rotation, or from reverse rotation to forward rotation, until the yarn storage motor stops rotating, thereby realizing rapid braking of the yarn storage motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the circuit structure of the utility model. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] See Figure 1 The improved yarn storage device control circuit includes a drive circuit and a control circuit. A yarn storage device motor M1 and a thyristor are provided in the drive circuit. The drive circuit is used to input alternating current, and the thyristor is used to control the alternating current to power the yarn storage device motor M1. A control module IC2 is provided in the control circuit, and the control module IC2 is electrically connected to the control end of the thyristor through a bidirectional optocoupler.

[0026] When AC power is supplied to the yarn storage motor M1, it can drive the yarn storage motor M1 to rotate. The yarn storage motor M1 can rotate both forward and reverse. A thyristor (SCR) can be used to achieve commutation (switching the phase line connecting the yarn storage motor M1 to the AC power source) when AC power is supplied to the yarn storage motor M1, thereby controlling the yarn storage motor M1 to switch between forward and reverse rotation. In the embodiment provided in the present application, the yarn storage motor is a unidirectional rotating motor, and its unidirectional rotation can be achieved through mechanical structures such as one-way bearings. If the yarn storage motor can rotate forward, the thyristor controls the yarn storage motor to reverse to achieve braking; if the yarn storage motor can reverse, the thyristor controls the yarn storage motor to rotate forward to achieve braking. In this embodiment, the yarn storage motor rotates forward to achieve the yarn storage function. When yarn storage is completed or a fault occurs and braking is required, the thyristor controls the yarn storage motor to reverse. At this time, the yarn storage motor is subjected to a reverse driving force, but the yarn storage motor cannot reverse due to the mechanical structure limitation of unidirectional rotation, so the yarn storage motor can quickly achieve braking.

[0027] In some embodiments, the control circuit and the drive circuit are connected via a bidirectional optocoupler to achieve electrical isolation between the two circuits, thereby improving the safety of the control circuit. The drive circuit may include an AC power supply, which provides AC power to the yarn storage motor M1. Specifically, the AC power supply powers the yarn storage motor M1 via a thyristor (SCR). The AC power supply also powers the bidirectional optocoupler, which is connected to the control terminal of the SCR. The bidirectional optocoupler can control the state of the SCR, thereby controlling the forward or reverse rotation (braking) of the yarn storage motor M1.

[0028] The optical transmitter of the bidirectional optocoupler is connected to the control circuit. The control circuit transmits an electrical signal to the bidirectional optocoupler, which converts the electrical signal transmitted by the control circuit into an optical signal. The optical signal is then used to control the electrical signal transmitted by the bidirectional optocoupler to the thyristor, thereby controlling the state of the thyristor and further controlling the operating state of the yarn storage motor M1, such as forward or reverse rotation (braking). Forward rotation of the yarn storage motor M1 enables the yarn storage to store yarn, and forward rotation followed by reverse rotation of the yarn storage motor M1 enables rapid braking of the yarn storage motor M1. A bidirectional optocoupler is provided between the control circuit and the drive circuit. This not only transmits the control signal to the yarn storage motor M1 to control the state of the yarn storage motor M1, but also electrically isolates the control circuit and the drive circuit, greatly improving the safety performance of the improved yarn storage control circuit during the operation of the yarn storage motor M1.

[0029] The bidirectional optocoupler includes a power interface, an electrical output interface, and a light emission input interface. The power interface is used to be electrically connected to the AC power supply, the electrical output interface is electrically connected to the control end of the thyristor, and the light emission input interface is electrically connected to the control module IC2.

[0030] In the embodiments provided herein, an AC power supply is electrically connected to a power interface, capable of supplying power to a bidirectional optocoupler. The electrical output interface is electrically connected to the control terminal of a thyristor (SCR). The electrical output interface outputs an electrical signal capable of controlling the state of the SCR, thereby controlling the forward or reverse rotation (braking) of the yarn storage motor M1. A control circuit is capable of controlling the electrical output interface of the bidirectional optocoupler to output an electrical signal. Specifically, a control module IC2 is electrically connected to the optical emission input interface, and the control circuit outputs an electrical signal to the optical emission input interface of the bidirectional optocoupler. The electrical signal output by the control circuit is capable of controlling the optical signal emitted by the bidirectional optocoupler. The optical signal emitted by the optocoupler is capable of controlling the electrical signal output by the electrical output interface of the bidirectional optocoupler, thereby controlling the state of the SCR.

[0031] There are two bidirectional optocouplers, each electrically connected to a control terminal of a thyristor. The two bidirectional optocouplers are OP1 and OP2, and the two thyristors are TQ1 and TQ2.

[0032] The optical transmission input interface includes a first interface and a second interface. The control module IC2 includes a first pin and a second pin. The first interface and the second interface are connected to the first pin and the second pin respectively.

[0033] In the embodiment provided in the present application, the control circuit transmits an electrical signal to the light emission input interface through the first pin and the second pin to realize control of the state of the thyristor.

[0034] The improved yarn storage device control circuit further comprises an isolation module T1 arranged between the drive circuit and the control circuit. The isolation module T1 is used to electrically isolate the drive circuit from the control circuit.

[0035] The improved yarn storage device control circuit also includes a rectifier D1 and a DC-DC module. The DC-DC input is connected to the AC power supply through rectifier D1, and the DC-DC output is used to power the control circuit. The DC-DC module includes a power chip IC1, a diode, an inductor L1, and a capacitor C3. These components form a buck circuit, with IC1 acting as a control switch.

[0036] In the embodiment provided in this application, the control module IC2 may be a chip, and the control module IC2 is generally powered by direct current. The rectifier D1 can convert alternating current into direct current, and the rectifier D1 may be a diode.

[0037] In the embodiment provided in the present application, the AC power is rectified by the rectifier D1 and then output as DC power. The DCDC module can change the voltage of the DC power output after rectification by the rectifier D1, so that the DC voltage output by the DCDC module can adapt to the rated voltage of the control module IC2.

[0038] The improved yarn storage device control circuit also includes a first switch SW1, a second switch SW2 and a third switch SW3, and the first switch SW1, the second switch SW2 and the third switch SW3 are electrically connected to the control module IC2 respectively; the first switch SW1 is used to control the yarn storage device to be turned on or off, the second switch SW2 is used to control the yarn breaking of the yarn storage device, and the third switch SW3 is used to control whether the yarn storage device turns on the yarn storage detection.

[0039] In the embodiment provided herein, the first switch SW1 can be a pushbutton switch. When the first switch SW1 is closed, the control module IC2 controls the thyristor to rotate the yarn storage motor M1 forward or reverse (braking). When the first switch SW1 is open, the control module IC2 controls the thyristor to stop the yarn storage motor M1. Specifically, a short press of the first switch SW1 powers the device on or clears an alarm, while a long press of the first switch SW1 for three seconds powers the device off. The first switch SW1 also has a save function (after powering off and restarting, the device will remember whether it was in the off or running state last time).

[0040] When the second switch SW2 is closed, it can transmit a yarn-breaking signal to the control module IC2, and the control module IC2 can control the yarn-breaking mechanism to perform a yarn-breaking action.

[0041] The third switch SW3 is closed as a signal for determining that the yarn storage device needs to store yarn, and the third switch SW3 is opened as a signal for determining that the yarn storage device does not need to store yarn.

[0042] In the embodiment provided in the present application, the control circuit further includes a transistor Q1 electrically connected to the control module IC2 , and the transistor Q1 is used to output an alarm signal to the control module IC2 .

[0043] The improved yarn storage device control circuit further includes an alarm module, which is electrically connected to the control module IC2 and is used for alarming;

[0044] The alarm module alarm meets at least one of the following conditions:

[0045] The second switch SW2 controls the yarn storage device to break the yarn;

[0046] The yarn storage motor M1 is blocked for a time greater than or equal to a first preset time;

[0047] The yarn storage device idles for a second preset time and is not fully stocked with yarn.

[0048] The first preset time may be 1.5 seconds, and the second preset time may be 10 seconds.

[0049] The alarm module may include a first indicator light and a second indicator light. After the transistor Q1 outputs an alarm signal to the control module IC2, the control module IC2 can control the states of the first indicator light and the second indicator light according to the alarm signal.

[0050] In the embodiment provided in the present application, the first indicator light may be a red light and the second indicator light may be a green light. If the transistor Q1 outputs an alarm signal, the first indicator light is always on. If the transistor Q1 does not output an alarm signal, the second indicator light is always on.

[0051] When the first switch SW1 is closed and the transistor Q1 does not output an alarm signal, the second indicator light is always on. When the first switch SW1 is open, the second indicator light is always off.

[0052] The improved yarn storage device control circuit further comprises a Hall sensor HR electrically connected to the control module IC2. The Hall sensor HR is used to detect the jump signal of the yarn storage device motor to identify the stalled, idling and braked states of the yarn storage device motor.

[0053] In the embodiment provided in the present application, the improved yarn storage device control circuit may further include a plurality of resistors, which may include resistors R1 to R14. The resistors in the improved yarn storage device control circuit may be adaptively increased or decreased according to actual conditions, and the present application does not impose any particular restrictions on the number and specific locations of the resistors.

[0054] The present application may further include a negative temperature coefficient thermistor disposed between the rectifier D1 and the AC power supply.

[0055] The improved yarn storage device control circuit may further include multiple capacitors, including capacitors C1 to C3. The capacitors are used for voltage stabilization or filtering. The present application does not impose any particular limitation on the number and specific location of the capacitors.

[0056] The improved yarn storage device control circuit may further include a plurality of diodes, including diodes D1 to D5. The diodes in the improved yarn storage device control circuit may be adaptively increased or decreased according to actual conditions. This application does not impose any special restrictions on the number and specific positions of the diodes.

[0057] For example, in the power-on state, when the second switch SW2 is disconnected and the third switch SW3 is closed, the control module IC2 outputs a control signal to drive the thyristor TQ1 to start the yarn storage motor M1 to start storing yarn, until the third switch SW3 sends a disconnect signal to stop storing yarn and drives the thyristor TQ2 to make the yarn storage motor M1 quickly reverse and brake, and so on.

[0058] If the HR Hall sensor continuous jump signal is not detected for more than 10 seconds after the yarn storage motor M1 is started (stall), the control module IC2 turns off the yarn storage motor M1, outputs an alarm signal through the transistor Q2, and the red light flashes at 1 second intervals.

[0059] If the third switch SW3 is not detected to be disconnected for more than 10 seconds after the yarn storage motor M1 is started (idling), the control module IC2 turns off the yarn storage motor M1, outputs an alarm signal through the transistor Q2, and the red light flashes at 1-second intervals.

[0060] If the second SW2 signal is closed (yarn breakage), the control module IC2 outputs a control signal to drive the thyristor TQ2, so that the yarn storage motor M1 is reversed to achieve the purpose of rapid braking of the weft storage wheel. At the same time, an alarm signal is output through the transistor Q1, and the red light is always on.

[0061] The above description is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features and principles described in the scope of the present invention patent application are included in the scope of the present invention patent application.

Claims

1. An improved yarn storage device control circuit, characterized in that: It includes a drive circuit and a control circuit. A yarn storage motor and a thyristor are provided in the drive circuit. The drive circuit is used to input alternating current, and the thyristor is used to control the alternating current to power the yarn storage motor. A control module is provided in the control circuit, and the control module is electrically connected to the control end of the thyristor through a bidirectional optical coupler. The bidirectional optocoupler includes a power supply interface, an electrical output interface, and a light emission input interface. The power supply interface is used to be electrically connected to an AC power supply, the electrical output interface is electrically connected to the control end of the thyristor, and the light emission input interface is electrically connected to the control module.

2. The improved yarn storage device control circuit according to claim 1, characterized in that: The thyristor is used to control the forward and reverse rotation of the yarn storage device motor.

3. The improved yarn storage device control circuit according to claim 1, characterized in that: There are two bidirectional optocouplers, and each of the bidirectional optocouplers is electrically connected to a control terminal of a thyristor.

4. The improved yarn storage device control circuit according to claim 1, characterized in that: The optical emission input interface includes a first interface and a second interface, the control module includes a first pin and a second pin, and the first interface and the second interface are connected to the first pin and the second pin respectively.

5. The improved yarn storage device control circuit according to claim 1, characterized in that: It also includes an isolation module arranged between the drive circuit and the control circuit.

6. The improved yarn storage device control circuit according to claim 1, characterized in that: It also includes a rectifier and a DCDC module, the input end of the DCDC module is connected to the AC power supply through the rectifier, and the output end of the DCDC module is used to power the control circuit.

7. The improved yarn storage device control circuit according to claim 1, characterized in that: The improved yarn storage device control circuit also includes a first switch, a second switch and a third switch, and the first switch, the second switch and the third switch are electrically connected to the control module respectively; the first switch is used to control the yarn storage device to be turned on or off, the second switch is used to control the yarn storage device to break yarn, and the third switch is used to control whether the yarn storage device turns on yarn storage detection.

8. The improved yarn storage device control circuit according to claim 7, characterized in that: It also includes an alarm module, the alarm module is electrically connected to the control module, and the alarm module is used for alarming; The alarm module alarm meets at least one of the following conditions: The second switch controls the yarn storage device to break the yarn; The yarn storage motor has a yarn blocking time that is greater than or equal to a first preset time; The yarn storage device idles for a second preset time and is not fully stocked with yarn.

9. The improved yarn storage device control circuit according to claim 1, characterized in that: It also includes a sensor electrically connected to the control module, and the sensor is used to detect the jump signal of the yarn storage device motor.

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