CN204726032U - A kind of disconnected paper detection control circuit for printing machine - Google Patents
A kind of disconnected paper detection control circuit for printing machine Download PDFInfo
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- CN204726032U CN204726032U CN201520464978.3U CN201520464978U CN204726032U CN 204726032 U CN204726032 U CN 204726032U CN 201520464978 U CN201520464978 U CN 201520464978U CN 204726032 U CN204726032 U CN 204726032U
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- wave rectification
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Abstract
The utility model discloses a kind of disconnected paper detection control circuit for printing machine, comprise connected AC power, full-wave rectification bridge, partial pressure type circuit.Diode VD1, diode VD2, diode VD3, diode VD4 that full-wave rectification bridge comprises transformer T and is connected with the secondary coil of transformer T, be connected with photoelectric tube EL between the tap of the secondary coil of transformer T and full-wave rectification bridge, between the primary coil of transformer T, be connected with switch contacts S1 and relay K 2.Partial pressure type circuit comprises photodiode VP, resistance R1, resistance R2, the slide rheostat RP of series connection.The control circuit being exclusively used in printing machine of the utility model design, do not need staff to think and observe the whether disconnected paper of machine, once disconnected paper, machine will decommission, decrease the damage that air transport is done to bring to machine, structure is simple, highly sensitive, result of use is good, is convenient to printing industry and promotes the use of on a large scale.
Description
Technical field
The utility model relates to a kind of testing circuit, particularly relates to a kind of disconnected paper detection control circuit for printing machine.
Background technology
The machine of printing word and image.Modern printing machine generally by locing up, inking, impression, the mechanism such as defeated paper (comprising folding) form.Its operation principle is: the writings and image that first will print makes forme, dress on the printer, then ink is coated on by artificial or printing machine place forme having writings and image, be transferred to directly or indirectly again on paper or other stocks (as textile, metallic plate, plastic cement, leather, plank, glass and pottery), thus copy the printed matter identical with forme.The invention of printing machine and development, the propagation for human civilization and culture has important function.
Two features maximum compared with common sheet-fed press of business rotary press are exactly: the first, and print speed printing speed is fast, can reach 18m/s the soonest; The second, the raw material used in printing process, by the paper tape continuously to front haulage, goes out to paste finally by disconnected of folding machine.From above 2: printing machine is when high speed printing, the phenomenons such as subsides are not smooth if folding machine rear end goes out, paperboard, the consequence caused is beyond imagination, only need several seconds time at a large amount of paper of folding apparatus inner accumulated, when this paper jam phenomenon is serious, will can cause destructive destruction to corresponding equipment.This paper that breaks does not stop and can receive in drum by underproof product, affects product quality; On the other hand, disconnected paper stops not in time, and operative employee will refund splicing, has must affect the stability of product, and operating efficiency reduces, and also has a significant impact the service life of equipment.
Utility model content
Utility model object: the purpose of this utility model is to solve deficiency of the prior art, provides a kind of structure simple, highly sensitive, the disconnected paper detection control circuit for printing machine that result of use is good.
Technical scheme: a kind of disconnected paper detection control circuit for printing machine described in the utility model, comprises connected AC power, full-wave rectification bridge, partial pressure type circuit;
Diode VD1, diode VD2, diode VD3, diode VD4 that described full-wave rectification bridge comprises transformer T and is connected with the secondary coil of transformer T, be connected with photoelectric tube EL between the tap of the secondary coil of described transformer T and full-wave rectification bridge, between the primary coil of described transformer T, be connected with switch contacts S1 and relay K 2;
Described partial pressure type circuit comprises the photodiode VP of series connection, resistance R1, resistance R2, slide rheostat RP, the negative pole of described photodiode VP is connected with full-wave rectification bridge, described resistance R1, the base stage b of NPN transistor VT1 is connected with between resistance R2, the colelctor electrode c of described NPN transistor VT1 is connected with full-wave rectification bridge respectively by resistance R3 and resistance R4 with emitter e, the emitter e of described NPN transistor VT1 is also connected with the base stage b of NPN transistor VT2, the colelctor electrode c of NPN transistor VT2 is connected with full-wave rectification bridge with relay K 1 by diode VD5 in parallel, the emitter e of NPN transistor VT2 is directly connected with full-wave rectification bridge,
Described AC power is 220V AC power, and alternating current source is also connected with switch S 2 and fuse FU.
Beneficial effect: the disconnected paper detection control circuit for printing machine of the utility model design, when printing machine normally works, paper is at the photoelectric tube EL as light head and pass through as receiving between bare headed photodiode VP, photodiode VP is by low light irradiation, its resistance is very large, because photodiode VP and resistance R1, resistance R2, slide rheostat RP forms partial pressure type circuit, make the Ube<0.7V of NPN transistor VT1, NPN transistor VT1 ends, NPN transistor VT2 also ends, relay K 1, relay K 2 is all in release conditions, control circuit no signal exports.When after disconnected paper, the illumination received as the photodiode VP receiving shaven head strengthens, and photoelectric current increases, and resistance reduces, and makes NPN transistor VT1 base stage b current potential increase, NPN transistor VT1 conducting.Because the base stage b current potential of NPN transistor VT2 also rises, NPN transistor VT2 is conducting thereupon also, relay K 1 adhesive, its normally opened contact closes, and makes relay K 2 also adhesive, now, control circuit has signal to export, and printing machine is shut down, and staff processes.Such circuit, do not need staff to think and observe the whether disconnected paper of machine, once disconnected paper, machine will decommission, and decreases the damage that air transport is done to bring to machine, and structure is simple, and highly sensitive, result of use is good, is convenient to printing industry and promotes the use of on a large scale.
Accompanying drawing explanation
Fig. 1 is electrical block diagram of the present utility model.
Detailed description of the invention
By particular specific embodiment, embodiment of the present utility model is described below, person skilled in the art scholar the content disclosed by this description can understand other advantages of the present utility model and effect easily.
As shown in Figure 1, a kind of disconnected paper detection control circuit for printing machine, comprises connected AC power, full-wave rectification bridge, partial pressure type circuit.
Diode VD1, diode VD2, diode VD3, diode VD4 that full-wave rectification bridge comprises transformer T and is connected with the secondary coil of transformer T, be connected with photoelectric tube EL between the tap of the secondary coil of transformer T and full-wave rectification bridge, between the primary coil of transformer T, be connected with switch contacts S1 and relay K 2.
Partial pressure type circuit comprises the photodiode VP of series connection, resistance R1, resistance R2, slide rheostat RP, the negative pole of photodiode VP is connected with full-wave rectification bridge, resistance R1, the base stage b of NPN transistor VT1 is connected with between resistance R2, the colelctor electrode c of NPN transistor VT1 is connected with full-wave rectification bridge respectively by resistance R3 and resistance R4 with emitter e, the emitter e of NPN transistor VT1 is also connected with the base stage b of NPN transistor VT2, the colelctor electrode c of NPN transistor VT2 is connected with full-wave rectification bridge with relay K 1 by diode VD5 in parallel, the emitter e of NPN transistor VT2 is directly connected with full-wave rectification bridge.
AC power is 220V AC power, and alternating current source is also connected with switch S 2 and fuse FU.
The disconnected paper detection control circuit for printing machine of the utility model design, when printing machine normally works, paper is at the photoelectric tube EL as light head and pass through as receiving between bare headed photodiode VP, photodiode VP is by low light irradiation, its resistance is very large, because photodiode VP and resistance R1, resistance R2, slide rheostat RP forms partial pressure type circuit, make the Ube<0.7V of NPN transistor VT1, NPN transistor VT1 ends, NPN transistor VT2 also ends, relay K 1, relay K 2 is all in release conditions, control circuit no signal exports.When after disconnected paper, the illumination received as the photodiode VP receiving shaven head strengthens, and photoelectric current increases, and resistance reduces, and makes NPN transistor VT1 base stage b current potential increase, NPN transistor VT1 conducting.Because the base stage b current potential of NPN transistor VT2 also rises, NPN transistor VT2 is conducting thereupon also, relay K 1 adhesive, its normally opened contact closes, and makes relay K 2 also adhesive, now, control circuit has signal to export, and printing machine is shut down, and staff processes.
The control circuit being exclusively used in printing machine of the utility model design, do not need staff to think and observe the whether disconnected paper of machine, once disconnected paper, machine will decommission, decrease the damage that air transport is done to bring to machine, structure is simple, highly sensitive, result of use is good, is convenient to printing industry and promotes the use of on a large scale.
Claims (1)
1., for a disconnected paper detection control circuit for printing machine, it is characterized in that: comprise connected AC power, full-wave rectification bridge, partial pressure type circuit;
Diode VD1, diode VD2, diode VD3, diode VD4 that described full-wave rectification bridge comprises transformer T and is connected with the secondary coil of transformer T, be connected with photoelectric tube EL between the tap of the secondary coil of described transformer T and full-wave rectification bridge, between the primary coil of described transformer T, be connected with switch contacts S1 and relay K 2;
Described partial pressure type circuit comprises the photodiode VP of series connection, resistance R1, resistance R2, slide rheostat RP, the negative pole of described photodiode VP is connected with full-wave rectification bridge, described resistance R1, the base stage b of NPN transistor VT1 is connected with between resistance R2, the colelctor electrode c of described NPN transistor VT1 is connected with full-wave rectification bridge respectively by resistance R3 and resistance R4 with emitter e, the emitter e of described NPN transistor VT1 is also connected with the base stage b of NPN transistor VT2, the colelctor electrode c of NPN transistor VT2 is connected with full-wave rectification bridge with relay K 1 by diode VD5 in parallel, the emitter e of NPN transistor VT2 is directly connected with full-wave rectification bridge,
Described AC power is 220V AC power, and alternating current source is also connected with switch S 2 and fuse FU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520464978.3U CN204726032U (en) | 2015-07-02 | 2015-07-02 | A kind of disconnected paper detection control circuit for printing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520464978.3U CN204726032U (en) | 2015-07-02 | 2015-07-02 | A kind of disconnected paper detection control circuit for printing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204726032U true CN204726032U (en) | 2015-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520464978.3U Expired - Fee Related CN204726032U (en) | 2015-07-02 | 2015-07-02 | A kind of disconnected paper detection control circuit for printing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204726032U (en) |
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2015
- 2015-07-02 CN CN201520464978.3U patent/CN204726032U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151222 Address after: 510000, room 2433, 1001 Xingang East Road, Guangzhou, Guangdong, Haizhuqu District Patentee after: GUANGZHOU HENGHAOTIAN ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY CO., LTD. Address before: Chashan village Yongning road Dasan street of Ouhai District 325000 in Zhejiang province Wenzhou City No. 30 second floor Patentee before: WENZHOU BOYUAN INDUSTRIAL DESIGN CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20160702 |