CN203592714U - Safety control system of pressure machine - Google Patents
Safety control system of pressure machine Download PDFInfo
- Publication number
- CN203592714U CN203592714U CN201320738475.1U CN201320738475U CN203592714U CN 203592714 U CN203592714 U CN 203592714U CN 201320738475 U CN201320738475 U CN 201320738475U CN 203592714 U CN203592714 U CN 203592714U
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- safety
- plc
- forcing press
- dual valve
- circuit
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Abstract
The utility model discloses a safety control system of a pressure machine. The safety control system comprises a PLC, a safety PLC and a dual valve. The signal input end of the safety PLC is connected with a safety input signal circuit, the signal output end of the safety PLC is connected with an execution circuit, a normally-open switch of a pressure machine starting relay, a normally-open switch of a pressure machine emergency stop relay and a normally-open switch of a pressure machine photoelectric relay are respectively connected with the signal input end of the PLC, normally-open switches of two dual valve control relays connected with the signal output end of the PLC are in series connection with normally-open switches of two dual valve safety relays in the execution circuit respectively, and then the normally-open switches of the two dual valve safety relays in the execution circuit are in series connection with two two-position three-way electromagnetic valves of the dual valve respectively. According to the safety control system, real-time detection is implemented on safety signals of the pressure machine so as to find a danger source as soon as possible, double-loop redundancy control is adopted in the safety PLC to enable the operation safety of the pressure machine to be fully ensured, the execution motion of the dual valve is monitored, a closed-loop feedback system is formed, and the safety level of the pressure machine can be obviously improved.
Description
Technical field
The utility model relates to a kind of control system, and particularly a kind of forcing press safety control system, belongs to Press Control System technical field.
Background technology
Forcing press belongs to the production equipment that safety requirements is higher; its main driving mechanism is the dual valve of controlled pressure machine clutch operating; if there is the abnormal or necessary hard stop of fault in forcing press; otherwise will cause damage to equipment; harm operating personnel's life security, its loss causing is very serious.Suddenly stop control system generally adopts single loop control to traditional forcing press safety, this single-circuit control system is mainly gathered the position signalling of forcing press by the each travel switch of forcing press, the signal by PLC, each travel switch being gathered is again processed, finally, by PLC output control signal, carry out relay and perform an action.
By the look of it, this safety control system can guarantee security in a short time, but, in the time that common relay and PLC cause disabler due to self-defect or outside cause (as faults such as contact melted, electric short circuit, processor disorders), will lose safety protection function, accidents caused; In addition, because this safety control system is not monitored executive component, not only detection failure in time, and control and whether be difficult to judge by designing requirement action for output, can not fully guarantee the safety of personnel and equipment.
Utility model content
The purpose of this utility model is for deficiency of the prior art, a kind of forcing press safety control system is provided, adopts double loop Redundant Control, and coordinate PLC to form double loop closed-loop control system, can realize the high request security control of forcing press, significantly improve forcing press safe class.
The purpose of this utility model is achieved in that a kind of forcing press safety control system, comprise the dual valve of PLC, safety PLC and controlled pressure machine clutch operating, described dual valve includes two two-position three way magnetic valves, and described PLC is connected with described safety PLC communication by condition of work feedback line; The signal input part of described safety PLC is connected with safe input signal circuit, and signal output part is connected with executive circuit; Described safe input signal circuit includes self-checking circuit one and self-checking circuit two, the signal input part of described self-checking circuit one accesses the self check output channel one of described safety PLC, and the signal input part of described self-checking circuit two accesses the self check output channel two of described safety PLC; Described self-checking circuit one and self-checking circuit two include respectively forcing press start button, forcing press scram button, forcing press photoelectric detective circuit, forcing press photoelectricity inhibition travel switch and safety door travel switch, the forcing press scram button of described self-checking circuit one and the interlock of the forcing press scram button of self-checking circuit two; Described self-checking circuit one also includes working mode change switch, and described self-checking circuit two also includes two dual valve actuating length switches that are connected in series; Described executive circuit comprises two-way dual valve safety relay, two-way forcing press starting relay, the anxious relay He Yi road forcing press photoelectric relay that stops of a road forcing press; The normal open switch of described forcing press starting relay, forcing press be anxious stops the normal open switch of relay and the normal open switch of forcing press photoelectric relay and accesses respectively the signal input part of described PLC; The signal input part of described PLC is also connected with respectively described working mode change switch and two described dual valve actuating length switches that are connected in series; The signal output part of described PLC is connected with two-way dual valve control relay; The power output end of described safety PLC is electrically connected with the control circuit of described dual valve, the control circuit of described dual valve includes the normal open switch of dual valve control relay described in the normal open switch of dual valve safety relay described in two-way and two-way, described in two-way, described in the normal open switch of dual valve safety relay and two-way, the normal open switch of dual valve control relay is connected in series respectively, then is connected in series with two described two-position three way magnetic valves respectively.
When the utility model work, first select mode of operation according to need of work, then press the forcing press start button of self-checking circuit one and self-checking circuit two simultaneously, two-way dual valve safety relay and two-way forcing press starting relay all electric, corresponding normal open switch is closed respectively, thus two-way dual valve control relay obtain electric, the normal open switch closure of dual valve control relay, two two-position three way magnetic valves of dual valve obtain electric work; Simultaneously; safety PLC detects each road input signal in real time by self check output channel; if any extremely taking corresponding safeguard measure; make relevant relay electric-loss; the normal open switch of relevant relay resets, and PLC, according to the duty of each normal open switch, takes corresponding measure; danger signal is removed, and PLC resumes work by condition of work feedback line notice safety PLC.Compared with prior art, the beneficial effects of the utility model are: 1, detect in real time the safety signal of safety control system by safety PLC, take in time safeguard measure, to stop dangerous generation and the diffusion of accident; 2, safety PLC adopts double loop Redundant Control, even if there is a loop to break down, still can prevent that forcing press from moving under the state not meeting the demands, and the handling safety of forcing press is fully guaranteed, and has significantly improved forcing press safe class; 3, the signal input part of safety PLC and PLC is all connected with dual valve actuating length switch, and performing an action of dual valve monitored, and forms closed loop feedback system, and processing safety is further improved.
As further improvement of the utility model, two degree that the signal input part of described PLC is also connected with forcing press fall mechanical cam travel switch, two-way electric cam braking detective circuit and the two-way electric cam angle feedback circuit of travel switch, two-way forcing press.Multiple signaling points to forcing press detect in real time, are more conducive to find as early as possible potential danger signal, take in time safeguard measure to get rid of potential safety hazard.
As preferred version of the present utility model, the PNOZ mm0.1P type safety PLC that described safety PLC adopts German Pilz GmbH & Co to produce.
Accompanying drawing explanation
Fig. 1 is I/O electric interfaces figure of the present utility model.
Fig. 2 is the I/O address allocation table of safety PLC in Fig. 1.
Fig. 3 is the I/O address allocation table of PLC in Fig. 1.
Wherein, 1, PLC; 2, safety PLC; 3, dual valve; 4, safe input signal circuit; 4a, self-checking circuit one; 4b, self-checking circuit two; 5, executive circuit.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, forcing press safety control system, the dual valve 3 that comprises PLC1, safety PLC 2 and controlled pressure machine clutch operating, dual valve 3 includes two two-position three way magnetic valve YV1, YV2, and PLC1 is connected with safety PLC 2 communications by condition of work feedback line.
The signal input part of safe input signal circuit 4 is connected with the COM port of safety PLC 2, the signal output part of safe input signal circuit 4 is connected with the signal input part of safety PLC 2, the signal input part of executive circuit 5 is connected with the signal output part of safety PLC 2, the signal output part of executive circuit 5 connects the no-voltage port of safety PLC 2, and the A2 port of safety PLC 2 is electrically connected with no-voltage port.
Safe input signal circuit 4 includes self-checking circuit one 4a and self-checking circuit two 4b, self check output channel one T1 of the signal input part access security PLC2 of self-checking circuit one 4a, self check output channel two T0 of the signal input part access security PLC2 of self-checking circuit two 4b.Self-checking circuit one 4a includes forcing press start button SB1, forcing press scram button SB3-1, forcing press photoelectric detective circuit S1, forcing press photoelectricity inhibition travel switch SQ1, safety door travel switch SQ5 and working mode change switch S A1.Self-checking circuit two 4b include forcing press start button SB2, forcing press scram button SB3-2, forcing press photoelectric detective circuit S2, forcing press photoelectricity inhibition travel switch SQ2, safety door travel switch SQ6 and two dual valve actuating length switch S Q3, SQ4 that are connected in series.The forcing press scram button SB3-2 interlock of the forcing press scram button SB3-1 of self-checking circuit one 4a and self-checking circuit two 4b, under normal operating conditions, forcing press scram button SB3-1, SB3-2 are all in closure state.
Dual valve actuating length switch S Q3, SQ4 that working mode change switch S A1 is connected in series with two are also connected with the signal input part of PLC1 respectively.The input of dual valve control relay KA7, KA8 is connected with the signal output part of PLC1 respectively, accesses the COM port of PLC1 after the output short circuit of dual valve control relay KA7, KA8.
The 24V DC power output end of safety PLC 2 is electrically connected with the control circuit of dual valve 3, for giving the control circuit power supply of dual valve 3, the 24V DC power output end of safety PLC 2 and its A1 port short circuit.
The control circuit of dual valve 3 includes the normal open switch KA1-1 that is controlled by dual valve safety relay KA1, be controlled by the normal open switch KA2-1 of dual valve safety relay KA2, be controlled by the normal open switch KA7-1 of dual valve control relay KA7, be controlled by the normal open switch KA8-1 of dual valve control relay KA8, after normal open switch KA1-1 and normal open switch KA7-1 series connection, be connected in series with one of them two-position three way magnetic valve YV1 of dual valve 3 again, after normal open switch KA2-1 and normal open switch KA8-1 series connection, be connected in series with another two-position three way magnetic valve YV2 of dual valve 3 again.
For being more conducive to find as early as possible potential danger signal; take in time safeguard measure to get rid of potential safety hazard; the utility model detects in real time multiple signaling points of forcing press and is programmed and carried out centralized Control by PLC; two degree of forcing press fall mechanical cam travel switch SQ8, the SQ9 of travel switch SQ7, two-way forcing press, two-way electric cam braking detective circuit BR1, BR2 and electric cam indicator lamp RD and two-way electric cam angle feedback circuit F1, F2 access respectively the signal input part of PLC.
As shown in Figure 2, be the I/O address allocation table of the utility model safety PLC 2; As shown in Figure 3, be the I/O address allocation table of the utility model PLC1.
As most preferred embodiment of the present utility model, the PNOZ mm0.1P type safety PLC that safety PLC 2 adopts German Pilz GmbH & Co to produce.
The utility model is not limited to above-described embodiment; as: safety PLC 2 also can adopt safety relay to replace on an equal basis; on the basis of the disclosed technical scheme of the utility model; those skilled in the art is according to disclosed technology contents; do not need performing creative labour just can make some replacements and distortion to some technical characterictics wherein, these replacements and distortion are all in protection domain of the present utility model.
Claims (3)
1. a forcing press safety control system, it is characterized in that, the dual valve that comprises PLC, safety PLC and controlled pressure machine clutch operating, described dual valve includes two two-position three way magnetic valves, and described PLC is connected with described safety PLC communication by condition of work feedback line;
The signal input part of described safety PLC is connected with safe input signal circuit, and signal output part is connected with executive circuit;
Described safe input signal circuit includes self-checking circuit one and self-checking circuit two, the signal input part of described self-checking circuit one accesses the self check output channel one of described safety PLC, and the signal input part of described self-checking circuit two accesses the self check output channel two of described safety PLC; Described self-checking circuit one and self-checking circuit two include respectively forcing press start button, forcing press scram button, forcing press photoelectric detective circuit, forcing press photoelectricity inhibition travel switch and safety door travel switch, the forcing press scram button of described self-checking circuit one and the interlock of the forcing press scram button of self-checking circuit two; Described self-checking circuit one also includes working mode change switch, and described self-checking circuit two also includes two dual valve actuating length switches that are connected in series;
Described executive circuit comprises two-way dual valve safety relay, two-way forcing press starting relay, the anxious relay He Yi road forcing press photoelectric relay that stops of a road forcing press; The normal open switch of described forcing press starting relay, forcing press be anxious stops the normal open switch of relay and the normal open switch of forcing press photoelectric relay and accesses respectively the signal input part of described PLC; The signal input part of described PLC is also connected with respectively described working mode change switch and two described dual valve actuating length switches that are connected in series; The signal output part of described PLC is connected with two-way dual valve control relay;
The power output end of described safety PLC is electrically connected with the control circuit of described dual valve, the control circuit of described dual valve includes the normal open switch of dual valve control relay described in the normal open switch of dual valve safety relay described in two-way and two-way, described in two-way, described in the normal open switch of dual valve safety relay and two-way, the normal open switch of dual valve control relay is connected in series respectively, then is connected in series with two described two-position three way magnetic valves respectively.
2. forcing press safety control system according to claim 1, it is characterized in that two degree that the signal input part of described PLC is also connected with forcing press fall mechanical cam travel switch, two-way electric cam braking detective circuit and the two-way electric cam angle feedback circuit of travel switch, two-way forcing press.
3. forcing press safety control system according to claim 1, is characterized in that, the PNOZ mm0.1P type safety PLC that described safety PLC adopts German Pilz GmbH & Co to produce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320738475.1U CN203592714U (en) | 2013-11-21 | 2013-11-21 | Safety control system of pressure machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320738475.1U CN203592714U (en) | 2013-11-21 | 2013-11-21 | Safety control system of pressure machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203592714U true CN203592714U (en) | 2014-05-14 |
Family
ID=50673628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320738475.1U Withdrawn - After Issue CN203592714U (en) | 2013-11-21 | 2013-11-21 | Safety control system of pressure machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203592714U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103587141A (en) * | 2013-11-21 | 2014-02-19 | 江苏扬力集团有限公司 | Safety control system for press machine |
| CN111703108A (en) * | 2020-06-12 | 2020-09-25 | 扬力集团股份有限公司 | Control system of double-point servo press |
-
2013
- 2013-11-21 CN CN201320738475.1U patent/CN203592714U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103587141A (en) * | 2013-11-21 | 2014-02-19 | 江苏扬力集团有限公司 | Safety control system for press machine |
| CN103587141B (en) * | 2013-11-21 | 2015-12-09 | 江苏扬力集团有限公司 | A kind of press safety control system |
| CN111703108A (en) * | 2020-06-12 | 2020-09-25 | 扬力集团股份有限公司 | Control system of double-point servo press |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140514 Effective date of abandoning: 20151209 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |