CN104317243A - Scraper slag conveyor protection circuit - Google Patents
Scraper slag conveyor protection circuit Download PDFInfo
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- CN104317243A CN104317243A CN201410638854.2A CN201410638854A CN104317243A CN 104317243 A CN104317243 A CN 104317243A CN 201410638854 A CN201410638854 A CN 201410638854A CN 104317243 A CN104317243 A CN 104317243A
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- dragveyer
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- oil pump
- relay
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/16—Plc to applications
- G05B2219/163—Domotique, domestic, home control, automation, smart, intelligent house
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a scraper slag conveyor protection circuit. The scraper slag conveyor protection circuit comprises a slag conveyor start and stop control circuit, a local centralized control switching circuit, a slag conveyor oil pump motor control loop, a slag conveyor trip signal circuit and a slag conveyor trip signal switch-on and switch-off circuit, wherein the slag conveyor start and stop control circuit controls start or stop of a scraper slag conveyor, the local centralized control switching circuit controls the slag conveyor start and stop control circuit to be switched between local control and remote centralized control, the slag conveyor start and stop control circuit triggers the slag conveyor oil pump motor control loop to control start or stop of a slag conveyor oil pump motor, the slag conveyor trip signal circuit receives a trip signal sent by a remote centralized control system and triggers the slag conveyor oil pump motor control loop to trip and be opened, and the slag conveyor trip signal switch-on and switch-off circuit controls switch-on or switch-off of the slag conveyor trip signal circuit. According to the scraper slag conveyor protection circuit, local PLC control is eliminated, the remote centralized control system is adopted to achieve centralized control over the scraper slag conveyor protection circuit, redundancy control is reduced, the number of fault points of operation of the slag conveyor is reduced, and therefore the abnormalities of mal-operation and miss-operation in slag conveyor protection are effectively restrained.
Description
Technical field
The present invention relates to a kind of power station auxiliary protection optimisation technique, be specifically related to a kind of submerged slag conveyor protection circuit.
Background technology
Dragveyer is the important subsidiary engine equipment of thermal power plant, its whether stable operation directly affect the safety of unit.To the protection optimization of dragveyer, the reliability of dragveyer can be improved.
As shown in Figure 1, for the control drawing of prior art dragveyer, wherein comprise connect power supply respectively scram button circuit, power supply indicating module, on the spot collection control module, manual automatic module, dragveyer start and stop control module, dragveyer Oil pump electrical machinery control loop, Oil pump electrical machinery fault alarm module, electric heater control loop, dragveyer run signal module, dragveyer chain rupture detection module, dragveyer chain rupture alarm module.Take multiple protective in dragveyer Oil pump electrical machinery control loop, be provided with the ultralow KAD2 of oil level, the ultralow KAD3 of oil temperature, oil temperature superelevation KAD7, dragveyer transverse shifting shift out KM5, dragveyer laterally shift out reset KM6, dragveyer electrical fault KA5, dragveyer chain rupture warning KA7 '.
Wherein relay K A2 is connected with a PLC module for controlling on the spot, however due to its with dragveyer Oil pump electrical machinery control loop the function that rises be the same, cause dragveyer to add a trouble spot, Redundant Control.
As shown in Figure 2, oil temperature on the spot high three for prior art gets the circuit diagram of secondary circuit, it comprises 24 volts of direct supplys and 10 volts of direct supplys, and be connected to the oil level low signal module between these two power supplys, ultralow warning module, ultralow oil temperature alarm module, electrical heating start module, refrigeratory run signal module, oil temperature height signaling module, superelevation oil temperature alarm module, oil return oil filter blocking are reported to the police, draining oil filter blocking alarm module, oil temperature superelevation three get two control loops, power station water-cool control loop, dragveyer speed-regulating control module.As seen from the figure, original oil temperature superelevation signal gets two by the oil temperature high three that hardwire realizes on the spot.
Its shortcoming is, the dragveyer control loop of prior art adopts the hard loop realized by relay, single relay fault or because wiring loosens, dragveyer all can be caused trip, and the probability of malfunction greatly, and is not easy to the cause investigation after accident.Dragveyer oil temperature superelevation, the ultralow protection of oil level are all single-point protections, poor reliability.
Summary of the invention
The invention provides a kind of submerged slag conveyor protection circuit, reduce circuit connection on the spot, improve the protection reliability of dragveyer.
For achieving the above object, the invention provides a kind of submerged slag conveyor protection circuit, be characterized in, this protection circuit comprises:
Dragveyer starting or stopping control circuit, its circuit connects submerged slag conveyor, controls starting or stoping of submerged slag conveyor;
Collection control commutation circuit on the spot, its circuit connects dragveyer starting or stopping control circuit, controls dragveyer starting or stopping control circuit and is controlling on the spot to switch between remote control;
Dragveyer Oil pump electrical machinery control loop, its circuit connects dragveyer starting or stopping control circuit and dragveyer Oil pump electrical machinery, and dragveyer starting or stopping control circuit triggers dragveyer Oil pump electrical machinery control loop to control startup or the closedown of dragveyer Oil pump electrical machinery;
Electric heater control loop, its circuit connects dragveyer fuel tank electric heater, controls startup or the closedown of dragveyer fuel tank electric heater;
Dragveyer trip signal circuit, its circuit connects dragveyer Oil pump electrical machinery control loop, and the remote central control that wireless communication connection is external, dragveyer trip signal circuit receives the trip signal that remote central control sends, and triggers the tripping operation of dragveyer Oil pump electrical machinery control loop and disconnects;
Dragveyer trip signal is thrown and is moved back circuit, and its circuit connects dragveyer trip signal circuit, controls the input of dragveyer trip signal circuit or exits.
Above-mentioned submerged slag conveyor protection circuit also comprises scram button circuit, and scram button circuit comprises the scram button of the power input being connected to submerged slag conveyor protection circuit, controls submerged slag conveyor protection circuit emergent stopping.
Above-mentioned submerged slag conveyor protection circuit also comprises Oil pump electrical machinery failure alarm circuit, and Oil pump electrical machinery failure alarm circuit comprises:
Dragveyer Oil pump electrical machinery electrothermal relay, its circuit is connected in dragveyer Oil pump electrical machinery;
Dragveyer Oil pump electrical machinery power transfer relay, its circuit connects dragveyer Oil pump electrical machinery control loop;
Dragveyer Oil pump electrical machinery electrothermal relay triggers dragveyer Oil pump electrical machinery power transfer relay when detecting dragveyer Oil pump electrical machinery fault, disconnects dragveyer Oil pump electrical machinery control loop.
The above-mentioned commutation circuit of collection control on the spot comprises distant place switching push button and on the spot distant signal relay on the spot; The trigger end of distant signal relay is connected in series with distant place switching push button on the spot on the spot, and the normally closed contact of distant signal relay and normally opened contact circuit are connected in dragveyer starting or stopping control circuit on the spot; Distant place switching push button is controlling switching between the collection control of a distant place by distant signal Control dragveyer starting or stopping control circuit on the spot on the spot on the spot.
Above-mentioned dragveyer starting or stopping control circuit comprises start-up circuit and halt circuit;
Above-mentioned start-up circuit comprises the normally closed contact of normally closed contact, on the spot manual actuation of button, the on the spot manual slew relay of the relay of distant signal be on the spot connected in series and manually boots relay trigger end on the spot; On the spot distant signal relay normally closed contact and on the spot manual actuation of button be connected in parallel to normally opened contact and the distant place collection control starting switch of distant signal relay on the spot;
Described halt circuit comprises normally closed contact, the on the spot manual stop button of the relay of distant signal be on the spot connected in series, the normally closed contact manually booting relay on the spot and manual slew relay trigger end on the spot; On the spot distant signal relay normally closed contact and on the spot manual stop button be connected in parallel to normally opened contact and the distant place collection control shutdown switch of distant signal relay on the spot;
The normally closed contact of distant signal relay is in closed on the spot, and normally opened contact is in disconnection, and manual actuation of button and manual stop button on the spot control submerged slag conveyor start and stop on the spot on the spot; The normally opened contact of distant signal relay is in closed on the spot, and normally closed contact is in disconnection, and distant place collection control starting switch and a collection control shutdown switch distant place, a distant place control submerged slag conveyor start and stop.
Above-mentioned dragveyer Oil pump electrical machinery control loop comprises the normally closed contact manually booting relay normally open contact, on the spot manual slew relay on the spot, the normally closed contact of dragveyer Oil pump electrical machinery power transfer relay, dragveyer chain rupture tripping relay normally closed contact and the dragveyer Oil pump electrical machinery contactor trigger end that are connected in series; The normally opened contact of dragveyer Oil pump electrical machinery contactor with manually boot relay normally open contact on the spot and be connected in parallel; The normally opened contact circuit of dragveyer Oil pump electrical machinery contactor connects dragveyer Oil pump electrical machinery, controls startup or the closedown of dragveyer Oil pump electrical machinery.
Above-mentioned electric heater control loop comprises: dragveyer fuel tank electrical heating starting relay and dragveyer fuel tank electrical heating contactor; Dragveyer fuel tank electrical heating contactor circuit connects dragveyer fuel tank electric heater, controls the electrically heated startup of dragveyer fuel tank or closedown.
Above-mentioned dragveyer trip signal circuit comprises the trigger end of remote control switch and the dragveyer chain rupture tripping relay be connected in series; The trip signal that remote central control sends, triggers dragveyer chain rupture tripping relay, controls the tripping operation of dragveyer Oil pump electrical machinery control loop and disconnects.
Above-mentioned dragveyer trip signal throwing is moved back circuit and is comprised: the dragveyer chain rupture be connected in series detects input exit button and dragveyer chain rupture detection input exits relay; Dragveyer chain rupture detects input exit button triggering dragveyer chain rupture detection input and exits Control dragveyer trip signal circuit input or exit.
Above-mentioned protection circuit also includes dragveyer run signal circuit; dragveyer run signal circuit includes normally opened contact and the dragveyer run indicator of the dragveyer Oil pump electrical machinery contactor be connected in series; when dragveyer Oil pump electrical machinery control loop controls the startup of dragveyer Oil pump electrical machinery; the normally opened contact of dragveyer Oil pump electrical machinery contactor closes, and dragveyer run indicator is luminous.
Submerged slag conveyor protection circuit of the present invention is compared with the submerged slag conveyor resist technology of prior art, its advantage is, present invention eliminates hand, auto-changeover control, and PLC controls on the spot, remote central control is adopted to carry out centralized control to submerged slag conveyor protection circuit, reduce Redundant Control, reduce the trouble spot that dragveyer runs, thus effectively contained the abnormal conditions of dragveyer false protection and tripping, greatly increase unit operation reliability, there is not the phenomenon of overprotection malfunction again in dragveyer since completing transformation, unit for identical type provides with reference to experience,
The present invention can be optimized transformation for its essential reason, make whole protection system have higher anti-malfunction and anti-tripping ability, and improvement expenses is low, Be very effective, saves writing and changes rapid wear electrical equipment and the expense that causes.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of prior art submerged slag conveyor protection circuit;
Fig. 2 be prior art submerged slag conveyor protection circuit on the spot oil temperature high three get the circuit diagram of secondary circuit;
Fig. 3 is the circuit diagram of submerged slag conveyor protection circuit of the present invention;
Fig. 4 realizes the schematic diagram that oil temperature high three gets two and dragveyer trip protection in submerged slag conveyor protection circuit remote central control of the present invention.
Embodiment
Below in conjunction with accompanying drawing, further illustrate specific embodiments of the invention.
As shown in Figure 1; disclose a kind of embodiment of submerged slag conveyor protection circuit, this protection circuit comprises: scram button circuit 101, power indicating circuit 102, scram button circuit 103, dragveyer starting or stopping control circuit 104, dragveyer Oil pump electrical machinery control loop 105, Oil pump electrical machinery failure alarm circuit 106, electric heater control loop 107, dragveyer run signal circuit 108, dragveyer trip signal are thrown and moved back circuit 109, dragveyer trip signal circuit 110.
Scram button circuit 101 comprises the scram button SB0 of the power input being connected to submerged slag conveyor protection circuit; this scram button SB0 is normally closed switch; for controlling submerged slag conveyor protection circuit emergent stopping; in case of emergency cut off the power supply of submerged slag conveyor protection circuit, thus emergent stopping submerged slag conveyor.
Power indicating circuit 102 comprises circuit and is connected to power light HL0 in submerged slag conveyor protection circuit; when submerged slag conveyor protection circuit is energized and controls submerged slag conveyor startup; power light HL0 lights; when the power-off of submerged slag conveyor protection circuit and submerged slag conveyor close time, power light HL0 extinguishes.
Collection control commutation circuit 103 circuit connects dragveyer starting or stopping control circuit 104 on the spot, controls dragveyer starting or stopping control circuit 104 and is controlling on the spot to switch between remote control.
Collection control commutation circuit 103 comprises distant place switching push button SA1 and on the spot distant signal relay K A1 on the spot on the spot.The trigger end of distant signal relay K A1 is connected in series with distant place switching push button SA1 on the spot on the spot, and the normally closed contact of distant signal relay K A1 and normally opened contact circuit are connected in dragveyer starting or stopping control circuit 104 on the spot.Switching push button SA1 in a distant place is by the closed of distant signal relay K A1 normally closed contact on the spot and normally opened contact or disconnect and control dragveyer starting or stopping control circuit 104 and controlling on the spot switching between the collection control of a distant place on the spot.
Dragveyer starting or stopping control circuit 104 circuit connects submerged slag conveyor, controls starting or stoping of submerged slag conveyor on the spot.
Dragveyer starting or stopping control circuit 104 includes start-up circuit and halt circuit.Start-up circuit and halt circuit adopt on the spot distant signal relay K A1, on the spot manual actuation of button SB1, on the spot manual stop button SB2, on the spot manual slew relay KA4, manually boot relay K A3, distant place collection control starting switch 112 and distant place collection control shutdown switch 113 on the spot and form.
Start-up circuit comprises: the normally closed contact of normally closed contact, on the spot the manual actuation of button SB1 of the relay K A1 of distant signal be on the spot connected in series, on the spot manual slew relay KA4 and manually boot relay K A3 trigger end on the spot.Wherein, on the spot distant signal relay K A1 normally closed contact and on the spot manual actuation of button SB1 be connected in parallel to normally opened contact and the distant place collection control starting switch 112 of distant signal relay K A1 on the spot, distant place collection control starting switch 112 communicates to connect distant place centralized control system, and distant place centralized control system adopts distant place PLC.
When closed, the normally opened contact of the normally closed contact of distant signal relay K A1 disconnects on the spot, dragveyer starting or stopping control circuit 104 controls dragveyer on the spot by manual actuation of button SB1 on the spot and starts; The normally closed contact of distant signal relay K A1 disconnects on the spot, normally opened contact is when closing, and dragveyer starting or stopping control circuit 104 controls dragveyer by distant place centralized control system by distant place collection control starting switch 112 and starts.
Halt circuit comprises: the normally closed contact of the relay K A1 of distant signal be on the spot connected in series, on the spot manual stop button SB2, the normally closed contact manually booting relay K A3 on the spot and manual slew relay KA4 trigger end on the spot; Wherein, on the spot distant signal relay K A1 normally closed contact and on the spot manual stop button SB2 be connected in parallel to normally opened contact and the distant place collection control shutdown switch 113 of distant signal relay K A1 on the spot.Distant place collection control shutdown switch 113 communicates to connect distant place centralized control system.
When closed, the normally opened contact of the normally closed contact of distant signal relay K A1 disconnects on the spot, dragveyer starting or stopping control circuit 104 controls dragveyer on the spot by manual stop button SB2 on the spot to be stopped; The normally closed contact of distant signal relay K A1 disconnects on the spot, normally opened contact is when closing, and dragveyer starting or stopping control circuit 104 controls dragveyer by distant place centralized control system by distant place collection control shutdown switch 113 to be stopped.
Dragveyer Oil pump electrical machinery control loop 105 circuit connects dragveyer starting or stopping control circuit 104 and dragveyer Oil pump electrical machinery, and dragveyer starting or stopping control circuit 104 triggers dragveyer Oil pump electrical machinery control loop 105 to control startup or the closedown of dragveyer Oil pump electrical machinery.
Dragveyer Oil pump electrical machinery control loop 105 comprises the trigger end of the normally closed contact manually booting relay K A3 normally opened contact, on the spot manual slew relay KA4 on the spot, the normally closed contact of dragveyer Oil pump electrical machinery power transfer relay KA5, dragveyer chain rupture tripping relay KA7 normally closed contact and the dragveyer Oil pump electrical machinery contactor KM1 be connected in series.The normally opened contact of dragveyer Oil pump electrical machinery contactor KM1 with manually boot relay K A3 normally opened contact on the spot and be connected in parallel.The normally opened contact circuit of dragveyer Oil pump electrical machinery contactor KM1 connects dragveyer Oil pump electrical machinery, when dragveyer Oil pump electrical machinery control loop 105 circuit turn-on, the trigger end of dragveyer Oil pump electrical machinery contactor KM1 triggers, triggering normally opened contact closes, control dragveyer Oil pump electrical machinery to start, or dragveyer Oil pump electrical machinery control loop 105 circuit disconnects, the normally opened contact controlling dragveyer Oil pump electrical machinery contactor KM1 disconnects, and controls dragveyer Oil pump electrical machinery and stops.
Oil pump electrical machinery failure alarm circuit 106 comprises: dragveyer Oil pump electrical machinery electrothermal relay FR1, dragveyer Oil pump electrical machinery power transfer relay KA5 and dragveyer Oil pump electrical machinery malfunction indicator lamp HL1.The trigger end of dragveyer Oil pump electrical machinery electrothermal relay FR1, dragveyer Oil pump electrical machinery power transfer relay KA5 is connected in series, and the trigger end of dragveyer Oil pump electrical machinery malfunction indicator lamp HL1 and dragveyer Oil pump electrical machinery power transfer relay KA5 is connected in parallel.
Dragveyer Oil pump electrical machinery electrothermal relay FR1 circuit is connected in dragveyer Oil pump electrical machinery, and when dragveyer Oil pump electrical machinery fault, dragveyer Oil pump electrical machinery electrothermal relay FR1 triggers and disconnects.
The normally closed contact circuit of dragveyer Oil pump electrical machinery power transfer relay KA5 connects in dragveyer Oil pump electrical machinery control loop, when dragveyer Oil pump electrical machinery electrothermal relay FR1 triggers closed, dragveyer Oil pump electrical machinery power transfer relay KA5 triggers, the normally closed contact of dragveyer Oil pump electrical machinery power transfer relay KA5 is disconnected, thus make the open circuit of dragveyer Oil pump electrical machinery control loop, control dragveyer Oil pump electrical machinery contactor KM1 and control the stopping of dragveyer Oil pump electrical machinery.Dragveyer Oil pump electrical machinery malfunction indicator lamp HL1 conducting simultaneously lights.
Electric heater control loop 107 circuit connects dragveyer fuel tank electric heater, for controlling startup or the closedown of dragveyer fuel tank electric heater.
Electric heater control loop 107 comprises: dragveyer fuel tank electrical heating starting relay KAD4 and dragveyer fuel tank electrical heating contactor KM2; Wherein the normally opened contact of dragveyer fuel tank electrical heating starting relay KAD4 and dragveyer fuel tank electrical heating contactor KM2 are connected in series, dragveyer fuel tank electrical heating contactor KM2 circuit connects dragveyer fuel tank electric heater, dragveyer fuel tank electrical heating starting relay KAD4 closes, and dragveyer fuel tank electrical heating contactor KM2 controls the electrical heating of dragveyer fuel tank and starts; Dragveyer fuel tank electrical heating starting relay KAD4 disconnects, and dragveyer fuel tank electrical heating contactor KM2 controls the electrical heating of dragveyer fuel tank and closes.
Dragveyer run signal circuit 108 comprises normally opened contact and the dragveyer run indicator HL2 of the control dragveyer Oil pump electrical machinery contactor KM1 be connected in series, when dragveyer Oil pump electrical machinery contactor KM1 triggers the startup of dragveyer Oil pump electrical machinery, the normally opened contact controlling dragveyer Oil pump electrical machinery contactor KM1 closes, and dragveyer run indicator HL2 lights.
Dragveyer trip signal circuit 110 circuit connects dragveyer Oil pump electrical machinery control loop 105, and the remote central control that wireless communication connection is external, dragveyer trip signal circuit 110 receives the trip signal that remote central control sends, and triggers the tripping operation of dragveyer Oil pump electrical machinery control loop 105 and disconnects.
Dragveyer trip signal circuit 110 comprises the trigger end of the remote control switch 111 and dragveyer chain rupture tripping relay KA7 be connected in series, and remote control switch 111 connects remote central control.The dragveyer trip signal that remote central control sends, remote control switch 111 closes, trigger dragveyer chain rupture tripping relay KA7, the normally closed contact controlling dragveyer chain rupture tripping relay KA7 in dragveyer Oil pump electrical machinery control loop disconnects, thus controls dragveyer Oil pump electrical machinery control loop tripping operation disconnection.
Herein, the principle of transformation is: will cancel by electric hard wired trip signal on the spot, change remote PLC into and realize trip signal, the tripping operation of dragveyer is realized eventually through dragveyer chain rupture tripping relay KA7, reduce because wiring loosens the equipment malfunction caused on the spot, process rapidly after being also beneficial to fault simultaneously.
As shown in Figure 4; the schematic diagram of two and dragveyer trip protection is got for realizing oil temperature high three in remote central control; wherein No. three dragveyer oil temperature height inputs are combined through and logic gate respectively and export three road signals to or logic gate; export the signal of dragveyer oil temperature superelevation; signal and the dragveyer chain rupture alerting signal of this dragveyer oil temperature superelevation together input to an or logic gate; when the signal of dragveyer oil temperature superelevation and dragveyer chain rupture alerting signal have arbitrarily one, namely remote central control exports dragveyer trip signal to dragveyer trip signal circuit 110.
Dragveyer trip signal is thrown and is moved back circuit 109 circuit connection dragveyer trip signal circuit 110, controls the input of dragveyer trip signal circuit 110 or exits.
The throwing of dragveyer trip signal is moved back circuit 109 and is comprised: the dragveyer chain rupture be connected in series detects input exit button SA3 and dragveyer chain rupture detection input exits relay K A6.Dragveyer chain rupture detection drops into exit button SA3 triggering dragveyer chain rupture detection input and exits relay K A6 control dragveyer trip signal circuit input or exit.
The present invention is directed to the not foot point of the original interlock protection design of dragveyer; carry out corresponding technological improvement and in daily servicing, taken effective safeguard; reach continuous, the reliable long-term operation of Important Auxiliary equipment dragveyer; ensure that boiler slag removal is timely; ensure that the safety of unit; ensure that related personnel's personal safety, create good social benefit.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a submerged slag conveyor protection circuit, is characterized in that, this protection circuit comprises:
Dragveyer starting or stopping control circuit, its circuit connects submerged slag conveyor, controls starting or stoping of submerged slag conveyor;
Collection control commutation circuit on the spot, its circuit connects dragveyer starting or stopping control circuit, controls dragveyer starting or stopping control circuit and is controlling on the spot to switch between remote control;
Dragveyer Oil pump electrical machinery control loop, its circuit connects dragveyer starting or stopping control circuit and dragveyer Oil pump electrical machinery, and dragveyer starting or stopping control circuit triggers dragveyer Oil pump electrical machinery control loop to control startup or the closedown of dragveyer Oil pump electrical machinery;
Electric heater control loop, its circuit connects dragveyer fuel tank electric heater, controls startup or the closedown of dragveyer fuel tank electric heater;
Dragveyer trip signal circuit, its circuit connects dragveyer Oil pump electrical machinery control loop, and the remote central control that wireless communication connection is external, dragveyer trip signal circuit receives the trip signal that remote central control sends, and triggers the tripping operation of dragveyer Oil pump electrical machinery control loop and disconnects;
Dragveyer trip signal is thrown and is moved back circuit, and its circuit connects dragveyer trip signal circuit, controls the input of dragveyer trip signal circuit or exits.
2. submerged slag conveyor protection circuit as claimed in claim 1; it is characterized in that; this protection circuit also comprises scram button circuit, and scram button circuit comprises the scram button of the power input being connected to submerged slag conveyor protection circuit, controls submerged slag conveyor protection circuit emergent stopping.
3. submerged slag conveyor protection circuit as claimed in claim 1, it is characterized in that, this protection circuit also comprises Oil pump electrical machinery failure alarm circuit, and Oil pump electrical machinery failure alarm circuit comprises:
Dragveyer Oil pump electrical machinery electrothermal relay (FR1), its circuit is connected in dragveyer Oil pump electrical machinery;
Dragveyer Oil pump electrical machinery power transfer relay (KA5), its circuit connects dragveyer Oil pump electrical machinery control loop;
Dragveyer Oil pump electrical machinery electrothermal relay (FR1) triggers dragveyer Oil pump electrical machinery power transfer relay (KA5) when detecting dragveyer Oil pump electrical machinery fault, disconnects dragveyer Oil pump electrical machinery control loop.
4. submerged slag conveyor protection circuit as claimed in claim 1, is characterized in that, the described commutation circuit of collection control on the spot comprises distant place switching push button (SA1) and on the spot distant signal relay (KA1) on the spot; The trigger end of distant signal relay (KA1) is connected in series with distant place switching push button (SA1) on the spot on the spot, and the normally closed contact of distant signal relay (KA1) and normally opened contact circuit are connected in dragveyer starting or stopping control circuit on the spot; Distant place switching push button (SA1) controls dragveyer starting or stopping control circuit by distant signal relay (KA1) on the spot and is controlling on the spot switching between the collection control of a distant place on the spot.
5. submerged slag conveyor protection circuit as claimed in claim 1, it is characterized in that, described dragveyer starting or stopping control circuit comprises start-up circuit and halt circuit;
Described start-up circuit comprises the normally closed contact of normally closed contact, on the spot manual actuation of button (SB1), the on the spot manual slew relay (KA4) of the relay of distant signal on the spot (KA1) be connected in series and manually boots relay (KA3) trigger end on the spot; On the spot distant signal relay (KA1) normally closed contact and on the spot manual actuation of button (SB1) be connected in parallel to normally opened contact and distant place collection control starting switch (112) of distant signal relay (KA1) on the spot;
Described halt circuit comprises normally closed contact, the on the spot manual stop button (SB2) of the relay of distant signal on the spot (KA1) be connected in series, the normally closed contact manually booting relay (KA3) on the spot and manual slew relay (KA4) trigger end on the spot; On the spot distant signal relay (KA1) normally closed contact and on the spot manual stop button (SB2) be connected in parallel to normally opened contact and distant place collection control shutdown switch (113) of distant signal relay (KA1) on the spot;
The normally closed contact of distant signal relay (KA1) is in closed on the spot, and normally opened contact is in disconnection, and manual actuation of button (SB1) and manual stop button (SB2) on the spot control submerged slag conveyor start and stop on the spot on the spot; The normally opened contact of distant signal relay (KA1) is in closed on the spot, and normally closed contact is in disconnection, and distant place collection control starting switch (112) and distant place collection control shutdown switch (113) distant place control submerged slag conveyor start and stop.
6. submerged slag conveyor protection circuit as claimed in claim 5, it is characterized in that, described dragveyer Oil pump electrical machinery control loop comprises the normally closed contact manually booting relay (KA3) normally opened contact, on the spot manual slew relay (KA4) on the spot, the normally closed contact of dragveyer Oil pump electrical machinery power transfer relay (KA5), dragveyer chain rupture tripping relay (KA7) normally closed contact and dragveyer Oil pump electrical machinery contactor (KM1) trigger end that are connected in series; The normally opened contact of dragveyer Oil pump electrical machinery contactor (KM1) with manually boot relay (KA3) normally opened contact on the spot and be connected in parallel; The normally opened contact circuit of dragveyer Oil pump electrical machinery contactor (KM1) connects dragveyer Oil pump electrical machinery, controls startup or the closedown of dragveyer Oil pump electrical machinery.
7. submerged slag conveyor protection circuit as claimed in claim 1, it is characterized in that, described electric heater control loop comprises: dragveyer fuel tank electrical heating starting relay (KAD4) and dragveyer fuel tank electrical heating contactor (KM2); Dragveyer fuel tank electrical heating contactor (KM2) circuit connects dragveyer fuel tank electric heater, controls the electrically heated startup of dragveyer fuel tank or closedown.
8. submerged slag conveyor protection circuit as claimed in claim 6, it is characterized in that, described dragveyer trip signal circuit comprises the trigger end of remote control switch and the dragveyer chain rupture tripping relay (KA7) be connected in series; The trip signal that remote central control sends, triggers dragveyer chain rupture tripping relay (KA7), controls the tripping operation of dragveyer Oil pump electrical machinery control loop and disconnects.
9. submerged slag conveyor protection circuit as claimed in claim 1, it is characterized in that, described dragveyer trip signal throwing is moved back circuit and is comprised: the dragveyer chain rupture be connected in series detects input exit button (SA3) and dragveyer chain rupture detection input exits relay (KA6); Dragveyer chain rupture detect drop into exit button (SA3) trigger dragveyer chain rupture detect input exit relay (KA6) control dragveyer trip signal circuit drop into or exit.
10. submerged slag conveyor protection circuit as claimed in claim 6; it is characterized in that; described protection circuit also includes dragveyer run signal circuit; dragveyer run signal circuit includes normally opened contact and the dragveyer run indicator (HL2) of the dragveyer Oil pump electrical machinery contactor (KM1) be connected in series; when dragveyer Oil pump electrical machinery control loop controls the startup of dragveyer Oil pump electrical machinery; the normally opened contact of dragveyer Oil pump electrical machinery contactor (KM1) closes, and dragveyer run indicator (HL2) is luminous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410638854.2A CN104317243A (en) | 2014-11-13 | 2014-11-13 | Scraper slag conveyor protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410638854.2A CN104317243A (en) | 2014-11-13 | 2014-11-13 | Scraper slag conveyor protection circuit |
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| CN104317243A true CN104317243A (en) | 2015-01-28 |
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| CN201410638854.2A Pending CN104317243A (en) | 2014-11-13 | 2014-11-13 | Scraper slag conveyor protection circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113126595A (en) * | 2021-03-31 | 2021-07-16 | 武汉益邦汽车技术有限公司 | Fault processing method and system for LPG vaporizing device |
| CN113126595B (en) * | 2021-03-31 | 2023-06-27 | 湖北普峰新能源科技有限公司 | Fault processing method and system for LPG vaporization device |
| CN113595447A (en) * | 2021-07-30 | 2021-11-02 | 内蒙古伊泰化工有限责任公司 | Protection control method and device for asynchronous motor and electronic equipment |
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