Improved circuit of carding machine

Abstract

The utility model provides an improved circuit of a carding machine. Comprising a PLC (Programmable Logic Controller) U1, a touch screen U2, a first frequency converter U3, a second frequency converter U4, a micro differential pressure sensor U5, a cylinder speed measurement sensor S1, a doffer speed measurement sensor S17, a cylinder motor start button S3, a cylinder motor stop button S4, a doffer motor start button S5, a doffer motor stop button S6, a broken bar sensor S16, a first frequency converter protection contact V1, a second frequency converter protection contact V2, a contactor K1 and a relay K2. A first cotton layer thickness sensor S12, a second cotton layer thickness sensor S13, a first cotton web thickness sensor S14, a second cotton web thickness sensor S15 and a reverse button S2; an electrical circuit is improved for an old carding machine, and certain automatic control functions are added, so that the functions of the carding machine are more complete, and the operation is safer.

Description

Technical Field

[0001] The utility model relates to an electric circuit, in particular to a cotton carding machine transformation circuit. Background Art

[0002] The carding machine FA224 is a product of Zhengzhou Textile Machinery Factory in the early 2000s. After more than 20 years of use, the electrical components of the original machine have aged and been damaged. In addition, since this model of carding machine was produced a long time ago, it is difficult to buy spare parts for the electrical components, and the machine is facing discontinuation of production.

[0003] In addition, the early FA224 carding machine had a low degree of automation and also needed electrical modification. Summary of the invention

[0004] In view of the shortcomings of the prior art, the embodiment of the utility model provides a carding machine transformation circuit, which is based on a PLC controller, improves the electrical circuit of the old carding machine, and adds some automatic control functions to make its functions more complete and its operation safer. In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:

[0005] In the first aspect, the embodiment of the utility model provides a carding machine transformation circuit, including a PLC controller U1, a touch screen U2, a first frequency converter U3, a second frequency converter U4, a micro-pressure difference sensor U5, a cylinder speed sensor S1, a doffer speed sensor S17, a cylinder motor start button S3, a cylinder motor stop button S4, a doffer motor start button S5, a doffer motor stop button S6, a broken strip sensor S16, a first frequency converter protection contact V1, a second frequency converter protection contact V2, a contactor K1, and a relay K2;

[0006] The PLC controller U1 includes a power module, the live wire terminal of the power module is connected to the live wire L, and the neutral terminal is connected to the neutral wire N; the power module provides low-voltage direct current for the PLC controller U1;

[0007] The touch screen U2 is connected to the display communication port of the PLC controller U1;

[0008] The control communication port of the PLC controller U1 is connected to the first frequency converter U3 and the second frequency converter U4 respectively; the first frequency converter U3 is used to drive the cotton feeding motor M1, and the second frequency converter U4 is used to drive the doffer motor M2;

[0009] The micro differential pressure sensor U5 is connected to the AD module configured by the PLC controller U1;

[0010] One end of the cylinder speed sensor S1 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0011] One end of the doffer speed sensor S17 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0012] One end of the cylinder motor start button S3 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0013] One end of the cylinder motor stop button S4 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0014] One end of the doffer motor start button S5 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0015] One end of the doffer motor stop button S6 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0016] One end of the broken bar sensor S16 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0017] The first inverter protection contact V1 and the second inverter protection contact V2 are connected in series to form a first protection branch, one end of the first protection branch is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0018] One end of the coil of the contactor K1 is connected to the live wire L, and the other end is connected to the corresponding output port on the PLC controller U1; the normally open contact of the contactor K1 is used to control the cylinder motor;

[0019] One end of the coil of the relay K2 is connected to the live wire L, and the other end is connected to the corresponding output port on the PLC controller U1; the normally open contact of the relay K2 is used to send a motor control signal to the first frequency converter U3 and the second frequency converter U4;

[0020] The AC common end of the output port on the PLC controller U1 is connected to the neutral line N.

[0021] Furthermore, the carding machine transformation circuit also includes a first cotton layer thickness sensor S12, a second cotton layer thickness sensor S13, a first cotton web thickness sensor S14, and a second cotton web thickness sensor S15;

[0022] One end of the first cotton layer thickness sensor S12 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0023] One end of the second cotton layer thickness sensor S13 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0024] One end of the first cotton web thickness sensor S14 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1;

[0025] One end of the second cotton web thickness sensor S15 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1.

[0026] Furthermore, the carding machine transformation circuit further includes a reverse button S2;

[0027] One end of the reverse button S2 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1.

[0028] Furthermore, the carding machine transformation circuit also includes an indicator light H1;

[0029] One end of the indicator light H1 is connected to the live wire L, and the other end is connected to the corresponding output port on the PLC controller U1.

[0030] The beneficial effect brought about by the technical solution provided by the embodiment of the utility model is: for old models of carding machines, the utility model provides a fully functional transformation circuit with perfect control functions and multiple protection functions, so that the carding machine can operate more safely after electrical transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is an electrical block diagram of an embodiment of the present utility model.

[0032] Figure 2 It is the electrical principle diagram in the embodiment of the utility model. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] like Figure 1 , Figure 2As shown, a cotton carding machine transformation circuit proposed in an embodiment of the utility model includes a PLC controller U1, a touch screen U2, a first frequency converter U3, a second frequency converter U4, a micro-pressure difference sensor U5, a cylinder speed sensor S1, a doffer speed sensor S17, a cylinder motor start button S3, a cylinder motor stop button S4, a doffer motor start button S5, a doffer motor stop button S6, a broken strip sensor S16, a first frequency converter protection contact V1, a second frequency converter protection contact V2, a contactor K1, and a relay K2;

[0035] The PLC controller U1 includes a power module, the live wire terminal of the power module is connected to the live wire L, and the neutral terminal is connected to the neutral wire N; the power module provides low-voltage direct current for the PLC controller U1; in this embodiment, the alternating current input to the PLC controller U1 is 220v, and the low-voltage direct current provided to the PLC controller U1 through the power module is 24v;

[0036] The touch screen U2 is connected to the display communication port of the PLC controller U1; in this embodiment, the display communication port of the PLC controller U1 adopts an RS422 port;

[0037] The control communication port of the PLC controller U1 is connected to the first frequency converter U3 and the second frequency converter U4 respectively; the first frequency converter U3 is used to drive the cotton feeding motor M1, and the second frequency converter U4 is used to drive the doffer motor M2; in this embodiment, the control communication port of the PLC controller U1 adopts an RS485 port;

[0038] The micro differential pressure sensor U5 is connected to the AD module configured by the PLC controller U1;

[0039] One end of the cylinder speed sensor S1 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the cylinder speed sensor S1 is connected to the X0 port on the PLC controller U1;

[0040] One end of the doffer speed sensor S17 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the doffer speed sensor S17 is connected to the X1 port on the PLC controller U1;

[0041] One end of the cylinder motor start button S3 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the cylinder motor start button S3 is connected to the X3 port on the PLC controller U1;

[0042] One end of the cylinder motor stop button S4 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the cylinder motor stop button S4 is connected to the X4 port on the PLC controller U1;

[0043] One end of the doffer motor start button S5 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the doffer motor start button S5 is connected to the X5 port on the PLC controller U1;

[0044] One end of the doffer motor stop button S6 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the doffer motor stop button S6 is connected to the X6 port on the PLC controller U1;

[0045] One end of the broken bar sensor S16 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the broken bar sensor S16 is connected to the X15 port on the PLC controller U1;

[0046] The first inverter protection contact V1 and the second inverter protection contact V2 are connected in series to form a first protection branch, one end of the first protection branch is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the first protection branch is connected to the X17 port on the PLC controller U1;

[0047] One end of the coil of the contactor K1 is connected to the live wire L, and the other end is connected to the corresponding output port on the PLC controller U1; the normally open contact of the contactor K1 is used to control the cylinder motor; the cylinder motor is not drawn in this embodiment; in this embodiment, the coil of the contactor K1 is connected to the Y7 port on the PLC controller U1;

[0048] One end of the coil of the relay K2 is connected to the live wire L, and the other end is connected to the corresponding output port on the PLC controller U1; the normally open contact of the relay K2 is used to send a motor control signal to the first frequency converter U3 and the second frequency converter U4; in this embodiment, the coil of the relay K2 is connected to the Y6 port on the PLC controller U2;

[0049] The AC common end of the output port on the PLC controller U1 is connected to the neutral line N.

[0050] The working principle of the utility model is as follows: when the cylinder motor start button S3 is pressed, the first frequency converter U3 (feeding frequency converter) and the second frequency converter U4 (doffer frequency converter) are first detected to see if there is any alarm information. If there is no alarm information, the cylinder motor is started, and at this time, the PLC controller U1 controls the coil of the contactor K1 to be energized; the normally open contact of the contactor K1 is closed, the cylinder motor is energized to operate, and the cylinder is driven to operate through the belt; a cylinder speed sensor S1 is installed on the cylinder, and the cylinder speed sensor S1 is used to The PLC controller U1 detects the cylinder speed. Only when the cylinder speed reaches the set value, the doffer motor M2 will start by pressing the doffer motor start button S5; the cotton feeding motor M1 and the doffer motor M2 are started at the same time. At this time, the PLC controller U1 controls the relay K2 coil to be energized, and the normally open contact of the relay K2 sends a motor control signal to the first frequency converter U3 and the second frequency converter U4; the first frequency converter U3 and the second frequency converter U4 respectively drive the cotton feeding motor M1 and the doffer motor M2 to operate together; the cotton feeding mechanism and the doffer of the carding machine start to operate; the raw material, i.e., the cotton layer, starts to enter the cylinder; the cotton net is output from the doffer;

[0051] Then the operator starts to prepare the cotton mesh for production; the operator twists the cotton mesh into cotton slivers and feeds them into the cotton sliver collecting mechanism; the cotton sliver collecting mechanism is provided with a broken sliver sensor S16, and after the broken sliver sensor S16 senses that there are cotton slivers continuously and for more than three seconds, the PLC controller U1 determines that the production is finished and automatically switches to normal production speed (i.e. express speed); the doffer is provided with a doffer speed sensor S17, and when it is detected that the doffer speed is lower than the protection set value for three consecutive seconds, the doffer motor M2 and the cotton feeding motor M1 are stopped.

[0052] The micro-pressure difference sensor U5 is used to detect the negative pressure in the negative pressure pipe on the carding machine; the negative pressure pipe can absorb impurities generated during the carding process; when the negative pressure value in the negative pressure pipe is insufficient, the PLC controller U1 can control the shutdown alarm.

[0053] The touch screen U2 is used to set production parameters, such as low-speed spinning speed, pulling times, strip output speed, etc., as well as parameters used for various protections; production stop fault information can also be displayed on the touch screen U2 to help maintenance personnel quickly locate problems and shorten the downtime of broken machines.

[0054] Other major automatic stop protection functions include:

[0055] Cylinder startup protection: During the startup phase, if the cylinder speed sensor S1 fails to detect the cylinder speed within 10 seconds, the PLC controller U1 will control the cylinder motor to stop automatically to prevent the motor from burning;

[0056] Sliver break protection: During normal production speed, when the sliver break sensor S16 detects that there is no sliver, the PLC controller U1 will control the doffer motor to stop automatically.

[0057] When the first inverter U3 or the second inverter U4 is overloaded or overheated, the first inverter protection contact V1 or the second inverter protection contact V2 will be disconnected, and the PLC controller U1 will control the cotton feeding motor M1 and the doffer motor M2 to stop; at the same time, it also controls the cylinder motor to stop.

[0058] More preferably, the carding machine modification circuit further includes a first cotton layer thickness sensor S12, a second cotton layer thickness sensor S13, a first cotton web thickness sensor S14, and a second cotton web thickness sensor S15;

[0059] One end of the first cotton layer thickness sensor S12 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the first cotton layer thickness sensor S12 is connected to the X10 port on the PLC controller U1;

[0060] One end of the second cotton layer thickness sensor S13 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the second cotton layer thickness sensor S13 is connected to the X11 port on the PLC controller U1;

[0061] One end of the first cotton web thickness sensor S14 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the first cotton web thickness sensor S14 is connected to the X12 port on the PLC controller U1;

[0062] One end of the second cotton web thickness sensor S15 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the second cotton web thickness sensor S15 is connected to the X13 port on the PLC controller U1;

[0063] The first cotton layer thickness sensor S12 and the second cotton layer thickness sensor S13 are installed on the left and right sides of the cotton layer before entering the cylinder; the first cotton web thickness sensor S14 and the second cotton web thickness sensor S15 are installed on the left and right sides of the cotton web output by the doffer; when it is detected that the cotton layer or cotton web is too thick, the PLC controller U1 will also control the cotton feeding motor M1, the cylinder motor and the doffer motor M2 to stop. The first cotton layer thickness sensor S12 and the second cotton layer thickness sensor S13 and the first cotton web thickness sensor S14 and the second cotton web thickness sensor S15 can all use proximity switches.

[0064] More preferably, the carding machine transformation circuit further includes a reverse button S2;

[0065] One end of the reverse button S2 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; in this embodiment, the reverse button S2 is connected to the X2 port on the PLC controller U1;

[0066] The reverse button S2 can control the cotton layer to exit, that is, the cotton feeding motor M1 reverses.

[0067] More preferably, the carding machine transformation circuit further includes an indicator light H1;

[0068] One end of the indicator light H1 is connected to the live wire L, and the other end is connected to the corresponding output port on the PLC controller U1; in this embodiment, the indicator light H1 is connected to the Y3 port on the PLC controller U1.

[0069] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A carding machine transformation circuit, characterized in that: It includes a PLC controller U1, a touch screen U2, a first frequency converter U3, a second frequency converter U4, a micro-pressure difference sensor U5, a cylinder speed sensor S1, a doffer speed sensor S17, a cylinder motor start button S3, a cylinder motor stop button S4, a doffer motor start button S5, a doffer motor stop button S6, a broken bar sensor S16, a first frequency converter protection contact V1, a second frequency converter protection contact V2, a contactor K1, and a relay K2; The PLC controller U1 includes a power module, the live wire terminal of the power module is connected to the live wire L, and the neutral terminal is connected to the neutral wire N; the power module provides low-voltage direct current for the PLC controller U1; The touch screen U2 is connected to the display communication port of the PLC controller U1; The control communication port of the PLC controller U1 is connected to the first frequency converter U3 and the second frequency converter U4 respectively; the first frequency converter U3 is used to drive the cotton feeding motor M1, and the second frequency converter U4 is used to drive the doffer motor M2; The micro differential pressure sensor U5 is connected to the AD module configured by the PLC controller U1; One end of the cylinder speed sensor S1 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; One end of the doffer speed sensor S17 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; One end of the cylinder motor start button S3 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; One end of the cylinder motor stop button S4 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; One end of the doffer motor start button S5 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; One end of the doffer motor stop button S6 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; One end of the broken bar sensor S16 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; The first inverter protection contact V1 and the second inverter protection contact V2 are connected in series to form a first protection branch, one end of the first protection branch is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; One end of the coil of the contactor K1 is connected to the live wire L, and the other end is connected to the corresponding output port on the PLC controller U1; the normally open contact of the contactor K1 is used to control the cylinder motor; One end of the coil of the relay K2 is connected to the live wire L, and the other end is connected to the corresponding output port on the PLC controller U1; the normally open contact of the relay K2 is used to send a motor control signal to the first frequency converter U3 and the second frequency converter U4; The AC common end of the output port on the PLC controller U1 is connected to the neutral line N.

2. The carding machine transformation circuit according to claim 1, characterized in that: The carding machine transformation circuit also includes a first cotton layer thickness sensor S12, a second cotton layer thickness sensor S13, a first cotton web thickness sensor S14, and a second cotton web thickness sensor S15; One end of the first cotton layer thickness sensor S12 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; One end of the second cotton layer thickness sensor S13 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; One end of the first cotton web thickness sensor S14 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1; One end of the second cotton web thickness sensor S15 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1.

3. The carding machine transformation circuit according to claim 1, characterized in that: The carding machine transformation circuit also includes a reverse button S2; One end of the reverse button S2 is connected to the DC common terminal of the PLC controller U1, and the other end is connected to the corresponding digital input port on the PLC controller U1.

4. The carding machine transformation circuit according to claim 1, characterized in that: The carding machine transformation circuit also includes an indicator light H1; One end of the indicator light H1 is connected to the live wire L, and the other end is connected to the corresponding output port on the PLC controller U1.

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