CN102039691A - PLC control system for pulverized coal hydraulic forming machine - Google Patents
PLC control system for pulverized coal hydraulic forming machine Download PDFInfo
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- CN102039691A CN102039691A CN2010106093209A CN201010609320A CN102039691A CN 102039691 A CN102039691 A CN 102039691A CN 2010106093209 A CN2010106093209 A CN 2010106093209A CN 201010609320 A CN201010609320 A CN 201010609320A CN 102039691 A CN102039691 A CN 102039691A
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Abstract
The invention discloses a programmable logic controller (PLC) control system for a pulverized coal hydraulic forming machine. The PLC control system comprises a main oil cylinder descending limit switch, a main oil cylinder ascending limit switch, a mould cylinder ascending limit switch, a mould cylinder descending limit switch, a feeding cylinder pushing limit switch, a feeding cylinder retraction limit switch and a PLC controller, wherein a normally open contact and a normally closed contact of each limit switch are connected with a corresponding input port on the PLC controller respectively; a main oil cylinder descending output port, a main oil cylinder ascending output port, a mould cylinder ascending output port, a mould cylinder descending output port, a feeding cylinder pushing output port and a feeding cylinder retraction output port on the PLC controller are connected with a contactor respectively; and the normally open contacts of all contactors are respectively connected with electromagnets which control a main oil cylinder, a mould cylinder and a feeding cylinder to operate. The PLC control system has high stability, guarantees coordinated operation of process steps of automatic feeding, compression molding of a hydraulic press and automatic discharging of the entire machine, and realizes automation, stable operation and unattended operation.
Description
Technical field
The present invention relates to a kind of control circuit, specifically a kind of PLC control system of fine coal hydraulic forming machine.
Background technology
The fine coal hydraulic forming machine is used for fine coal is squeezed into piece, the fine coal hydraulic forming machine comprises shaping mechanism and feed mechanism, shaping mechanism is made up of the staking punch of the master cylinder drive on top and the mould of bottom, the piston that is provided with in the mould is driven by mould cylinder, the coal cinder of compression moulding can be ejected mould.Feed mechanism comprises a truck that is driven by charging cylinder, truck bottom opening.Material fell in the mould from the opening of truck bottom when charging cylinder was pushed into mould top with truck, and in the process that charging cylinder promotion truck moves ahead, truck will be pushed into the finished product conveyer structure from the coal cinder that mould ejects.The fine coal hydraulic forming machine is finished coal powder formation according to " the descending binder-master cylinder of master cylinder is up-the up pushing-off product of mould cylinder-charging cylinder releases and drive truck and move ahead-the descending material of mould cylinder falls in the mould-charging cylinder drives truck and regain the descending binder of the charging-oil cylinder again " continuous operation that according to said method circulates.
Summary of the invention
Technical problem to be solved by this invention provides a kind of PLC control system that is used to control the coordinated operation of fine coal hydraulic forming machine each several part, has stable advantage.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be: the PLC control system of fine coal hydraulic forming machine comprises that the descending limit switch of master cylinder, the up limit switch of master cylinder, the up limit switch of mould cylinder, the descending limit switch of mould cylinder, feeding cylinder are released limit switch, the feeding cylinder is regained limit switch and PLC controller; Descending limit switch of master cylinder and the up limit switch of master cylinder are separately positioned on descending spacing point and the up spacing point that drives the cephalomotor master cylinder of punching press; Up limit switch of mould cylinder and the descending limit switch of mould cylinder are separately positioned on up spacing point and the descending spacing point that drives the mould cylinder of injection block motion in the mould; The feeding cylinder is released limit switch and feeding cylinder and is regained limit switch and be separately positioned on the spacing point that moves ahead at the feeding cylinder that drives the stack pallet motion and the spacing point of withdrawal; The normally opened contact of each limit switch and normally-closed contact are connected with corresponding input port on the PLC controller respectively, the descending delivery outlet of master cylinder on the PLC controller, the up delivery outlet of master cylinder, the up delivery outlet of mould cylinder, the descending delivery outlet of mould cylinder, feeding cylinder are released on delivery outlet and the feeding cylinder withdrawal delivery outlet and are connected to contactor respectively, the normally opened contact of each contactor is connected with control master cylinder, mould cylinder and the electromagnet of feeding cylinder action respectively, also is provided with the input port of start button and stop button on the PLC controller.
The invention has the beneficial effects as follows: the PLC control system has good stable, guarantee the process procedure coordination operation of " automatic charging-hydraulic press compression moulding-material returned automatically " of complete machine, realize automation fully, automatic charging, the material returned automatically during machine run, stable, the personnel that need not operation on duty.
Description of drawings
Fig. 1 is the circuit connection diagram of PLC control system of the present invention.
Fig. 2 is a hydraulic oil cylinder driving circuit diagram of the present invention.
Fig. 3 is a PLC control program ladder diagram of the present invention.
Mark among the figure: 1, the descending limit switch normally opened contact of master cylinder, 2, the up limit switch normally opened contact of master cylinder, 3, the descending limit switch normally-closed contact of master cylinder, 4, the up limit switch normally-closed contact of master cylinder, 5, the up limit switch normally opened contact of mould cylinder, 6, the descending limit switch normally opened contact of mould cylinder, 7, the up limit switch normally-closed contact of mould cylinder, 8, the descending limit switch normally-closed contact of mould cylinder, 9, the feeding cylinder is released limit switch normally opened contact, 10, the feeding cylinder reclaims limit switch normally opened contact, 11, the feeding cylinder is released the limit switch normally-closed contact, 12, the feeding cylinder reclaims the limit switch normally-closed contact, 13, start button, 14, stop button, 15, the descending delivery outlet of master cylinder, 16, the up delivery outlet of master cylinder, 17, the up delivery outlet of mould cylinder, 18, the descending delivery outlet of mould cylinder, 19, the feeding cylinder is released delivery outlet, 20, the feeding cylinder reclaims delivery outlet, 21, the PLC controller.
KM1, KM2, KM3, KM4, KM5, KM6 are contactor among the figure; DT1, DT2, DT3, DT4, DT5, DT6 are electromagnet.
The specific embodiment
As shown in Figure 1, 2, the PLC control system of fine coal hydraulic forming machine comprises that the descending limit switch of master cylinder, the up limit switch of master cylinder, the up limit switch of mould cylinder, the descending limit switch of mould cylinder, feeding cylinder are released limit switch, the feeding cylinder is regained limit switch and PLC controller 21; Descending limit switch of master cylinder and the up limit switch of master cylinder are separately positioned on descending spacing point and the up spacing point that drives the cephalomotor master cylinder of punching press; Up limit switch of mould cylinder and the descending limit switch of mould cylinder are separately positioned on up spacing point and the descending spacing point that drives the mould cylinder of injection block motion in the mould; The feeding cylinder is released limit switch and feeding cylinder and is regained limit switch and be separately positioned on the spacing point that moves ahead at the feeding cylinder that drives the stack pallet motion and the spacing point of withdrawal; The normally opened contact of each limit switch and normally-closed contact are connected with corresponding input port on the PLC controller 21 respectively, the descending delivery outlet 15 of master cylinder on the PLC controller 21, the up delivery outlet 16 of master cylinder, the up delivery outlet 17 of mould cylinder, the descending delivery outlet 18 of mould cylinder, feeding cylinder are released on delivery outlet 19 and the feeding cylinder withdrawal delivery outlet 20 and are connected to contactor respectively, the normally opened contact of each contactor is connected with control master cylinder, mould cylinder and the electromagnet of feeding cylinder action respectively, also is provided with the input port of start button 13 and stop button 14 on PLC controller 21.
As shown in Figure 3, operation principle of the present invention is:
The circuit for controlling motor energising, motor rotation, oil pump is opened, system's fuel feeding.
Master cylinder is descending: press start button 13, the program of PLC controller 21 begins to carry out pulse timer TM0 timing, its self-holding contact closure, the descending delivery outlet 15 control contactor KM1 coils of master cylinder continue energising, electromagnet DT1 energising, the electro-hydraulic reversing valve action, master cylinder is descending.When the main oil cylinder piston bar went downwards to desired location, the descending limit switch normally-closed contact 3 of master cylinder disconnected descending end.
Master cylinder is up: during descending end, and descending limit switch normally opened contact 1 closure of master cylinder, pulse timer TM1 timing, its self-holding contact closure, the up delivery outlet 16 control contactor KM2 coils of master cylinder continue energising, electromagnet DT2 energising, the electro-hydraulic reversing valve action, master cylinder is up.When the main oil cylinder piston bar was up to desired location, the up limit switch normally-closed contact 4 of master cylinder disconnected up end.
Mould cylinder is up: during the up end of master cylinder, and up limit switch normally opened contact 2 closures of master cylinder, pulse timer TM2 timing, its self-holding contact closure, the up delivery outlet 17 control contactor KM3 coils of mould cylinder continue energising, electromagnet DT3 energising, the electro-hydraulic reversing valve action, mould cylinder is up.When the mould cylinder piston rod was up to desired location, the up limit switch normally-closed contact 7 of mould cylinder disconnected the up end of mould cylinder.
The feeding cylinder is released: during the up end of mould cylinder, and up limit switch normally opened contact 5 closures of mould cylinder, pulse timer TM3 timing, its self-holding contact closure, feeding cylinder are released delivery outlet 19 control contactor KM5 coils and are continued energising, electromagnet DT5 energising, the electro-hydraulic reversing valve action, the feeding cylinder is released.When the feeding cylinder piston rod was pushed into desired location with truck, the feeding cylinder was released limit switch normally-closed contact 11 and is disconnected, and the feeding cylinder is released and finished.
Mould cylinder is descending: the feeding cylinder is released when finishing, and the feeding cylinder is released limit switch normally opened contact 9 closures, pulse timer TM4 timing, its self-holding contact closure, the descending delivery outlet 18 control contactor KM4 coils of mould cylinder continue energising, electromagnet DT4 energising, the electro-hydraulic reversing valve action, mould cylinder is descending.When the mould cylinder piston rod went downwards to desired location, the descending limit switch normally-closed contact 8 of mould cylinder disconnected the descending end of mould cylinder.
The feeding cylinder reclaims: during the descending end of mould cylinder, and descending limit switch normally opened contact 6 closures of mould cylinder, pulse timer TM5 timing, its self-holding contact closure, feeding cylinder reclaim delivery outlet 20 control contactor KM6 coils and continue energising, electromagnet DT6 energising, the electro-hydraulic reversing valve action, the feeding cylinder reclaims.When the feeding cylinder piston rod was recovered to desired location, the feeding cylinder reclaimed limit switch normally-closed contact 12 and disconnects, and the feeding cylinder reclaims and finishes.
The feeding cylinder reclaims when finishing, and the feeding cylinder reclaims limit switch normally opened contact 10 closures, and next working cycles is carried out in pulse timer TM0 timing, makes the hydraulic system continuous operation.Pressing stop button X1 cut-out circuit in the time of need stopping to stop system.
Claims (1)
1. the PLC control system of fine coal hydraulic forming machine is characterized in that: comprise that the descending limit switch of master cylinder, the up limit switch of master cylinder, the up limit switch of mould cylinder, the descending limit switch of mould cylinder, feeding cylinder are released limit switch, the feeding cylinder is regained limit switch and PLC controller (21); Descending limit switch of master cylinder and the up limit switch of master cylinder are separately positioned on descending spacing point and the up spacing point that drives the cephalomotor master cylinder of punching press; Up limit switch of mould cylinder and the descending limit switch of mould cylinder are separately positioned on up spacing point and the descending spacing point that drives the mould cylinder of injection block motion in the mould; The feeding cylinder is released limit switch and feeding cylinder and is regained limit switch and be separately positioned on the spacing point that moves ahead at the feeding cylinder that drives the stack pallet motion and the spacing point of withdrawal; The normally opened contact of each limit switch is gone up corresponding input port with PLC controller (21) respectively with normally-closed contact and is connected, the descending delivery outlet of master cylinder (15) on the PLC controller (21), the up delivery outlet of master cylinder (16), the up delivery outlet of mould cylinder (17), the descending delivery outlet of mould cylinder (18), the feeding cylinder is released on delivery outlet (19) and the feeding cylinder withdrawal delivery outlet (20) and is connected to contactor respectively, the normally opened contact of each contactor respectively with control master cylinder, mould cylinder is connected with the electromagnet of feeding cylinder action, also is provided with the input port of start button (13) and stop button (14) on PLC controller (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106093209A CN102039691A (en) | 2010-12-28 | 2010-12-28 | PLC control system for pulverized coal hydraulic forming machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106093209A CN102039691A (en) | 2010-12-28 | 2010-12-28 | PLC control system for pulverized coal hydraulic forming machine |
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| Publication Number | Publication Date |
|---|---|
| CN102039691A true CN102039691A (en) | 2011-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010106093209A Pending CN102039691A (en) | 2010-12-28 | 2010-12-28 | PLC control system for pulverized coal hydraulic forming machine |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2077957A (en) * | 1980-06-14 | 1981-12-23 | Giles & Sons Ltd John | Press apparatus |
| CN2082232U (en) * | 1990-06-18 | 1991-08-07 | 徐维贵 | Automatic hydraulic fine coal forming machine |
| JPH07198056A (en) * | 1993-12-28 | 1995-08-01 | Sumitomo Metal Ind Ltd | Solenoid valve control device at the operating time of safety switch |
| CN2908135Y (en) * | 2005-12-21 | 2007-06-06 | 陈锐球 | Four-column type stretching expansion hydraulic press |
| CN201020866Y (en) * | 2007-03-26 | 2008-02-13 | 龙岩华洁机械工贸有限公司 | Garbage compressor human-machine dialog display and control device |
| CN101161450A (en) * | 2007-11-22 | 2008-04-16 | 天津市天锻压力机有限公司 | T type double moveable platform structure of hydraulic press as well as its drive and control system |
| CN201231582Y (en) * | 2008-04-17 | 2009-05-06 | 刘廷明 | Cold compression automatic molding machine of diamond powder |
-
2010
- 2010-12-28 CN CN2010106093209A patent/CN102039691A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2077957A (en) * | 1980-06-14 | 1981-12-23 | Giles & Sons Ltd John | Press apparatus |
| CN2082232U (en) * | 1990-06-18 | 1991-08-07 | 徐维贵 | Automatic hydraulic fine coal forming machine |
| JPH07198056A (en) * | 1993-12-28 | 1995-08-01 | Sumitomo Metal Ind Ltd | Solenoid valve control device at the operating time of safety switch |
| CN2908135Y (en) * | 2005-12-21 | 2007-06-06 | 陈锐球 | Four-column type stretching expansion hydraulic press |
| CN201020866Y (en) * | 2007-03-26 | 2008-02-13 | 龙岩华洁机械工贸有限公司 | Garbage compressor human-machine dialog display and control device |
| CN101161450A (en) * | 2007-11-22 | 2008-04-16 | 天津市天锻压力机有限公司 | T type double moveable platform structure of hydraulic press as well as its drive and control system |
| CN201231582Y (en) * | 2008-04-17 | 2009-05-06 | 刘廷明 | Cold compression automatic molding machine of diamond powder |
Non-Patent Citations (2)
| Title |
|---|
| 李粤: "《液压***PLC控制》", 30 September 2009, 化学工业出版社 * |
| 赵峰等: "可编程序控制器（PLC）在砌块成型机中的应用", 《机械》 * |
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Application publication date: 20110504 |