CN103163794B - Blower fan, air lock, well heater interlock control apparatus - Google Patents
Blower fan, air lock, well heater interlock control apparatus Download PDFInfo
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- CN103163794B CN103163794B CN201310084856.7A CN201310084856A CN103163794B CN 103163794 B CN103163794 B CN 103163794B CN 201310084856 A CN201310084856 A CN 201310084856A CN 103163794 B CN103163794 B CN 103163794B
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Abstract
The invention discloses a kind of blower fan, air lock, well heater interlock control apparatus, comprise main current supply circuit, pilot lamp loop and two equipment control loops, externally fed power supply is connected to circuit breaker Q 1 end of incoming cables, Q1 leading-out terminal connects contactor KM end of incoming cables, the electrothermal relay FR of KM leading-out terminal connecting fan motor; In addition, before connection Q1, externally fed power supply draws two-phase electricity respectively for connection transformer TR1 and TR2; Outside 380V power source transition is become 220V by transformer TR1, and L2-N2 end is respectively used to the power supply of two control loops, and outside 380V power source transition is become 24V by transformer TR1 simultaneously, and L-N end is used to indicate the power supply in lamp loop; Outside 380V power supply is become 220V by transformer TR2, and L3-N3 end, L4-N4 end are respectively used to the power supply of well heater and air lock.
Description
Technical field
The invention belongs to technical field of electrical automation control, relate to a kind of blower fan, air lock, well heater interlock control apparatus.
Background technology
Oil drilling platform often can use blower fan between various workplace, storage, send into fresh air from outside in room by blower fan.For making room air normal convection, room, except needs air inlet, also needs to set out air port at rational position.When causing danger, in order to prevent the harmful gas outside room from entering room, need to increase fire proof wind sluice at inlet and outlet.If when personnel or equipment have a requirement to temperature in room, also need mounting heater in intake stack.
At present, the starter gear of drilling platform fan, air lock, well heater is unified to be arranged in the drawout cubicle in automatically controlled cabin, and its power supply needs from automatically controlled cabin cabling to apparatus body; In addition, in room, be provided with the start-stop button of above-mentioned each equipment, need other cabling connecting drawer cabinet and button.General outfit multiple stage ventilation blower, air lock, well heater on platform, this just needs to draw very many cables from automatically controlled cabin.Though blower fan, air lock, well heater are three kinds of independently equipment, but in use, have certain relevance: 1) during fan starting, the air lock of inlet and outlet must start; 2), when well heater runs, blower fan, air lock must start; 3), when air lock starts, other equipment need not start.
Summary of the invention
The object of this invention is to provide a kind of blower fan, air lock, well heater interlock control apparatus, solve coordinated in prior art not enough, annexation is complicated, and cable is too many, and take up room large problem.
The technical solution adopted in the present invention is, a kind of blower fan, air lock, well heater interlock control apparatus, is characterized in that: comprise main current supply circuit, pilot lamp loop, equipment control loop one and equipment control loop two,
Described main current supply circuit structure is that externally fed power supply is connected to circuit breaker Q 1 end of incoming cables, and Q1 leading-out terminal connects contactor KM end of incoming cables, the electrothermal relay FR of KM leading-out terminal connecting fan motor; In addition, before connection Q1, externally fed power supply draws two-phase electricity respectively for connection transformer TR1 and TR2; The 220V that outside 380V power source transition becomes L2-N2 to hold by transformer TR1, simultaneously the transformer TR1 24V that becomes L-N to hold outside 380V power source transition; Outside 380V power supply is become the 220V of L3-N3 end, L4-N4 end by transformer TR2.
The invention has the beneficial effects as follows: control box can be placed on to be needed in room with good ventilation, outside need provide a road power supply, control and the powerup issue of above-mentioned three kinds of equipment in a room can be solved, decrease the quantity of cable between automatically controlled cabin and each room; And by rigid line connecting mode, the controllers such as PLC need not be adopted can to realize the interlocking on off control of three kinds of equipment.
1) this control box only need draw a cable to control box body from automatically controlled cabin, can realize the power supply of blower fan, air lock, well heater.
2) this control box can be placed on needs in room with good ventilation, reduces taking of automatically controlled cabin spaces.The start-stop button of integrated blower fan, air lock, well heater and run indicator on control panel
3) this control box can according to the interlock requirement of blower fan, air lock, well heater, correct start and stop equipment, and when pressing fan starting button, air lock also can start; When pressing blower fan stop button, air lock also can stop; Well heater is identical therewith.The realization of above-mentioned functions, does not need to use the controllers such as PLC, low cost of manufacture.
Accompanying drawing explanation
Fig. 1 is the main current supply circuit sketch of blower fan of the present invention, air lock, well heater interlock control apparatus;
Fig. 2 is the pilot lamp loop sketch of blower fan of the present invention, air lock, well heater interlock control apparatus;
Fig. 3 is equipment control loop one sketch of blower fan of the present invention, air lock, well heater interlock control apparatus;
Fig. 4 is equipment control loop two sketch of blower fan of the present invention, air lock, well heater interlock control apparatus.
In figure, TR1, TR2 are transformer, and FR is electrothermal relay, and Q1, Q2, Q3 are isolating switch,
KM, KM3, KM4 are contactor, and H1, H2, H3, H4, H5 are pilot lamp,
KA0, KA1, KA2, KA3, KA4, KA5, KA6, KA7 are relay,
SB1, SB2, SB3, SB4, SB5, SB6 are gauge tap,
FU1, FU2, FU3, FU4, FU5, FU6, FU7, FU8 are fuse.
Embodiment
The structure of blower fan of the present invention, air lock, well heater interlock control apparatus is, comprise main current supply circuit, pilot lamp loop and two equipment control loops, the effect of all parts in circuit is:
Circuit breaker Q 1 for Non-follow control blower fan current supply circuit closed and disconnected, and has motor overload protection function.Circuit breaker Q 2 is for Non-follow control heating installation power supply circuit closed and disconnection.Circuit breaker Q 3 is for Non-follow control air lock current supply circuit closed and disconnected.
Contactor KM controls blower fan circuit closed and disconnection according to interlock requirement.Contactor KM3 is according to interlock requirement control heater circuit closed and disconnection.Contactor KM4 controls air lock circuit closed and disconnection according to interlock requirement.
When relay K A0 is used for blower fan main current supply circuit fault, disconnect the power supply of blower fan, air lock, well heater control loop.When relay K A1 is used for blower fan main current supply circuit non-fault, connect the normal pilot lamp of blower fan.Relay K A2 is used for air-blower control loop, realizes the functions such as the interlocking start and stop of blower fan and air lock and fan starting self-sustaining.Relay K A3 is used for well heater control loop, realizes the functions such as the interlocking start and stop of well heater and air lock and heater starting self-sustaining.Relay K A4, KA5 are used for air lock control loop, the control of the tentaculum KM4 that achieves a butt joint.Relay K A6 is for connecting air lock running status feedback signal, and during air lock normal operation, KA6 obtains electric.Relay K A7 for connecting outside washout, when there is no this signal, KA7 dead electricity.
Gauge tap SB2 and SB1 is used for the on off control of blower fan.Gauge tap SB4 and SB3 is used for the on off control of well heater.Gauge tap SB6 and SB5 is used for the on off control of air lock.
Pilot lamp H1 is used for blower fan current supply circuit malfunction coefficient.Pilot lamp H2 is used for blower fan current supply circuit and normally shows.Pilot lamp H3 is used for fan operation display.Pilot lamp H4 is used for well heater and runs display.Pilot lamp H5 is used for air lock and runs display.
Electrothermal relay FR is used for carrying out overload protection to blower motor.
Fuse FU1-FU8, only plays circuit protective effect, does not affect the control of equipment.
With reference to Fig. 1, the structure of main current supply circuit is, externally fed power supply is connected to circuit breaker Q 1 end of incoming cables, and Q1 leading-out terminal connects contactor KM end of incoming cables, the electrothermal relay FR of KM leading-out terminal connecting fan motor; In addition, before connection Q1, externally fed power supply draws two-phase electricity respectively for connection transformer TR1 and TR2; Outside 380V power source transition is become 220V(L2-N2 by transformer TR1), L2-N2 end is respectively used to the power supply (see Fig. 3 and Fig. 4) of two control loops, outside 380V power source transition is become 24V(L-N by transformer TR1 simultaneously), L-N end is used to indicate the power supply (see figure 2) in lamp loop; Outside 380V power supply is become 220V(L3-N3, L4-N4 by transformer TR2), L3-N3 end, L4-N4 end are used for the power supply (see figure 4) of well heater and air lock.
Two input ends of transformer TR1 are in series with FU1 and FU2 respectively, and output terminal L2 and L is respectively arranged with FU3 and FU4, and two input ends of transformer TR2 are in series with FU5 and FU6 respectively, and output terminal L3 and L4 is respectively arranged with FU7 and FU8.
With reference to Fig. 2, the structure of pilot lamp loop is, anode L connects normally opened contact Q1, and the contact Q1 other end is connected to five tunnels: 1) be connected with hot normally opened contact FR, the FR other end connects relay K A0 respectively and pilot lamp H1, KA0 are connected pilot lamp loop negative terminal N with the pilot lamp H1 other end; 2) be connected with normally closed contact KM, the KM other end connects normally opened contact KA1, and the KA1 other end connects pilot lamp H2, and the H2 other end connects pilot lamp loop negative terminal N; 3) be connected with normally opened contact KM, the KM other end connects pilot lamp H3, and the H3 other end connects pilot lamp loop negative terminal N; 4) be connected with normally opened contact KM3, the KM3 other end connects pilot lamp H4, and the H4 other end connects pilot lamp loop negative terminal N; 5) be connected with normally opened contact KM4, the KM4 other end connects normally opened contact KA6, and the KA6 other end connects pilot lamp H5, and the H5 other end connects pilot lamp loop negative terminal N.
With reference to Fig. 3, the structure of control loop one is, L2 end is connected to four tunnels: 1) be connected with normally closed contact FR, the FR other end connects relay K A1 and normally opened contact KA5 respectively, KA1 other end connection control loop N2 holds, and the normally opened contact KA5 other end is connected with normally opened contact KA6, relay K M control loop N2 in turn and holds; 2) be connected with stop button SB1, the SB1 other end is connected with normally closed contact KA0, normally closed contact KA7 in turn, KA7 is connected with normally opened contact KA2 and start button SB2 respectively, KA2 with the SB2 other end is connected with relay K A2 jointly, and the KA2 other end is held with control loop N2 and is connected; 3) be connected with stop button SB3, the SB3 other end connects normally closed contact KA0, normally closed contact KA7 successively, KA7 is connected with normally opened contact KA3 and start button SB4 respectively, KA3 with the SB4 other end is connected with relay K A3 jointly, and the KA3 other end is held with control loop N2 and is connected; 4) be connected with stop button SB5, the SB5 other end is connected with normally closed contact KA0, normally closed contact KA7 successively, KA7 is connected with normally opened contact KA4, start button SB6, normally opened contact KA3, normally opened contact KA2 respectively simultaneously, KA4 with the SB6 other end is connected with relay K A5 jointly, the KA5 other end to be held with control loop N2 by KA4 and is connected, KA3 with the KA2 other end is connected with relay K A5 jointly, and the KA5 other end is held with control loop N2 and is connected.
With reference to Fig. 4, the structure of control loop two is, L6, N6 in Fig. 4 correspond respectively to L2, N2 end, and L6 end is connected with normally opened contact KA4, normally opened contact KA5, normally opened contact KM4 respectively; KA4 with the KA5 other end is connected with relay K M4 jointly, and KM4 other end connection control loop N6 holds; Normally opened contact KM4 holds with normally opened contact KM, relay K M3, control loop N6 successively and is connected;
Current supply circuit L3-N3 is connected with circuit breaker Q 2 end of incoming cables, and Q2 leading-out terminal is connected with contactor KM3, and the KM3 other end is connected with well heater, powers;
Current supply circuit L4-N4 is connected with circuit breaker Q 3 end of incoming cables, and Q3 leading-out terminal is connected with contactor KM4, and the KM4 other end is connected with air lock, powers;
KA6 represents air lock running status feedback signal, and after air lock runs, KA6 normally opened contact closes;
KA7 represents outside washout, and after having urgent signal, KA7 normally closed contact is opened.
The course of work of apparatus of the present invention is:
1, prepare before starting:
1.1) by Fig. 1 circuit breaker Q 1, Fig. 4 circuit breaker Q 2, Q3 manual closing; After circuit breaker Q 1 is closed, its auxiliary contact Q1 at Fig. 2 closes.
1.2) after circuit breaker Q 1 closes, if the electrothermal relay FR action of Fig. 1, its normally opened contact FR at Fig. 2 closes, and now fan trouble pilot lamp H1 brightens, and relay K A0 obtains electric simultaneously, and it all disconnects at three normally opened contact KA0 of Fig. 3.When malfunction indicator lamp lights, do not allow to start any equipment.Relay K A0 obtain electric after, the start-stop button of each equipment lost efficacy.
1.3) after circuit breaker Q 1 closes, if the electrothermal relay FR of Fig. 1 does not have action, it remains closed at the normally closed contact FR of Fig. 3, and relay K A1 obtains electric, and its normally opened contact KA1 at Fig. 2 closes.If now the contactor KM1 of Fig. 1 does not close, then the normal pilot lamp H2 of the blower fan of Fig. 2 brightens.When the normal pilot lamp of blower fan lights, just allow to start each equipment.
2, blower fan shutdown process:
2.1) when starting blower fan, press Fig. 3 button SB2, Fig. 3 relay K A2 obtains electric, its normally opened contact KA2 at Fig. 3 closes, Fig. 3 relay K A5 is obtained electric, its normally opened contact KA5 at normally opened contact KA5 and Fig. 3 of Fig. 4 closes, and relay K M4 is obtained electric, the contactor KM4 of Fig. 4 closes, and air lock obtains electric startup.When air lock normal operation, relay K A6 obtains electric, and its normally opened contact KA6 at Fig. 3 closes, and relay K M is obtained electric, and the contactor KM of Fig. 1 closes, and blower fan obtains electric startup.
2.2), when stopping blower fan, Fig. 3 button SB1 is pressed, Fig. 3 relay K A2 dead electricity, its normally opened contact KA2 at Fig. 3 disconnects, and makes Fig. 3 relay K A5 dead electricity, and its normally opened contact KA5 at normally opened contact KA5 and Fig. 3 of Fig. 4 disconnects, the contactor KM4 of Fig. 4 disconnects, and air lock dead electricity stops.When air lock is out of service, the relay K A6 dead electricity of Fig. 4, its normally opened contact KA6 at Fig. 3 disconnects, and makes relay K M dead electricity, and the contactor KM of Fig. 1 disconnects, and blower fan dead electricity stops.
3, air lock shutdown process:
3.1) when starting air lock, press Fig. 3 button SB6, Fig. 3 relay K A4 obtains electric, and its normally opened contact at Fig. 4 closes, and Fig. 4 relay K M4 is obtained electric, and the contactor KM4 of Fig. 4 closes, and air lock obtains electric startup.
3.2), when stopping air lock, press Fig. 3 button SB5, Fig. 3 relay K A4 dead electricity, its normally opened contact at Fig. 4 disconnects, and makes Fig. 4 relay K M4 dead electricity, and the contactor KM4 of Fig. 4 disconnects, and air lock obtains electric startup.
4, well heater shutdown process:
4.1) when starting well heater, press Fig. 3 button SB4, Fig. 3 relay K A3 obtains electric, its normally opened contact at Fig. 3 closes, Fig. 3 relay K A5 is obtained electric, its normally opened contact KA5 at normally opened contact KA5 and Fig. 3 of Fig. 4 closes, and relay K M4 is obtained electric, the contactor KM4 of Fig. 4 closes, and air lock obtains electric startup.When air lock normal operation, the relay K A6 of Fig. 4 obtains electric, and its normally opened contact KA6 at Fig. 3 closes, and relay K M is obtained electric, and the contactor KM of Fig. 1 closes, and blower fan obtains electric startup.Now, the normally opened contact of relay K M4 and the normally opened contact of relay K M close, and Fig. 4 relay K M3 are obtained electric, and the contactor KM3 of Fig. 4 closes, and well heater obtains electric startup.
4.2), when stopping well heater, Fig. 3 button SB3 is pressed, Fig. 3 relay K A3 dead electricity, its normally opened contact at Fig. 3 disconnects, and makes Fig. 3 relay K A5 dead electricity, and its normally opened contact KA5 at normally opened contact KA5 and Fig. 3 of Fig. 4 closes, the contactor KM4 of Fig. 4 disconnects, and air lock dead electricity stops.When air lock is out of service, relay K A6 dead electricity, its normally opened contact KA6 at Fig. 3 disconnects, and makes relay K M dead electricity, and the contactor KM of Fig. 1 disconnects, and blower fan dead electricity stops.Now, the normally opened contact of relay K M4 and the normally opened contact of relay K M disconnect, and make Fig. 4 relay K M3 dead electricity, and the contactor KM3 of Fig. 4 disconnects, and well heater dead electricity stops.
Apparatus of the present invention, can realize the function such as interlocking on off control, running status display, equipment emergent stopping of blower fan, air lock, well heater.Outside need provide a road power supply to control box, can realize above-mentioned all functions.
Claims (1)
1. blower fan, air lock, a well heater interlock control apparatus, is characterized in that: comprise main current supply circuit, pilot lamp loop, equipment control loop one and equipment control loop two,
Described main current supply circuit structure is that externally fed power supply is connected to the end of incoming cables of circuit breaker Q 1, and the leading-out terminal of circuit breaker Q 1 connects the end of incoming cables of contactor KM, the electrothermal relay FR of the leading-out terminal connecting fan motor of contactor KM; In addition, before connecting breaker Q1, externally fed power supply draws two-phase electricity respectively for connection transformer TR1 and TR2; The 220V that outside 380V power source transition becomes L2-N2 to hold by transformer TR1, simultaneously the transformer TR1 24V that becomes L-N to hold outside 380V power source transition; Outside 380V power supply is become the 220V of L3-N3 end, L4-N4 end by transformer TR2;
The structure of described pilot lamp loop is, the normally opened contact of anode L connecting breaker Q1, and the normally opened contact other end of circuit breaker Q 1 is connected to five tunnels:
1) be connected with the normally opened contact of electrothermal relay FR, the normally opened contact other end of electrothermal relay FR connects relay K A0 respectively and pilot lamp H1, relay K A0 are connected pilot lamp loop negative terminal N with the pilot lamp H1 other end;
2) be connected with the normally closed contact of contactor KM, the normally closed contact other end of contactor KM connects the normally opened contact of relay K A1, and the normally opened contact other end of relay K A1 connects pilot lamp H2, and the pilot lamp H2 other end connects pilot lamp loop negative terminal N;
3) be connected with the normally opened contact of contactor KM, the normally opened contact other end of contactor KM connects pilot lamp H3, and the pilot lamp H3 other end connects pilot lamp loop negative terminal N;
4) be connected with the normally opened contact of contactor KM3, the normally opened contact other end of contactor KM3 connects pilot lamp H4, and the pilot lamp H4 other end connects pilot lamp loop negative terminal N;
5) be connected with the normally opened contact of contactor KM4, the normally opened contact other end of contactor KM4 connects the normally opened contact of relay K A6, and the normally opened contact other end of relay K A6 connects pilot lamp H5, and the pilot lamp H5 other end connects pilot lamp loop negative terminal N;
Contactor KM controls blower fan circuit closed and disconnection according to interlock requirement;
Relay K A6 is for connecting air lock running status feedback signal, and during air lock normal operation, relay K A6 obtains electric;
The structure of described equipment control loop one is, L2 end is connected to four tunnels:
1) be connected with the normally closed contact of electrothermal relay FR, the normally closed contact other end of electrothermal relay FR connects the normally opened contact of relay K A1 and relay K A5 respectively, relay K A1 other end connection control loop N2 holds, and the normally opened contact other end of relay K A5 is connected with normally opened contact KA6, relay K M control loop N2 in turn and holds;
2) be connected with stop button SB1, the stop button SB1 other end is connected with normally closed contact KA0, normally closed contact KA7 in turn, normally closed contact KA7 is connected with normally opened contact KA2 and start button SB2 respectively, normally opened contact KA2 is connected with relay K A2 jointly with the start button SB2 other end, and the relay K A2 other end is held with control loop N2 and is connected;
3) be connected with stop button SB3, the stop button SB3 other end connects normally closed contact KA0, normally closed contact KA7 successively, normally closed contact KA7 is connected with normally opened contact KA3 and start button SB4 respectively, normally opened contact KA3 is connected with relay K A3 jointly with the start button SB4 other end, and the relay K A3 other end is held with control loop N2 and is connected;
4) be connected with stop button SB5, the stop button SB5 other end is connected with normally closed contact KA0, normally closed contact KA7 successively, and normally closed contact KA7 is connected with normally opened contact KA4, start button SB6, normally opened contact KA3, normally opened contact KA2 respectively simultaneously; Normally opened contact KA4 is connected with the normally closed contact of relay K A5 jointly with the start button SB6 other end, and the normally closed contact other end of relay K A5 is held with control loop N2 by relay K A4 and is connected; Normally opened contact KA3, the normally opened contact KA2 other end are connected with relay K A5 jointly, and the relay K A5 other end is held with control loop N2 and is connected;
The structure of described equipment control loop two is,
L6, N6 wherein correspond respectively to L2, N2 end, and L6 end is connected with the normally opened contact of normally opened contact KA4, relay K A5, the normally opened contact of contactor KM4 respectively; Normally opened contact KA4 is connected with relay K M4 jointly with the normally opened contact other end of relay K A5, and contactor KM4 other end connection control loop N6 holds; The normally opened contact of contactor KM4 is held be connected with the normally opened contact of contactor KM, contactor KM3, control loop N6 successively;
Current supply circuit L3-N3 is connected with the end of incoming cables of circuit breaker Q 2, and the leading-out terminal of circuit breaker Q 2 is connected with contactor KM3, and the contactor KM3 other end is connected with well heater;
Current supply circuit L4-N4 is connected with the end of incoming cables of circuit breaker Q 3, and the leading-out terminal of circuit breaker Q 3 is connected with contactor KM4, and the contactor KM4 other end is connected with air lock;
Two input ends of described transformer TR1 are in series with fuse FU1 and FU2 respectively, output terminal L2 and L is respectively arranged with fuse FU3 and FU4, two input ends of transformer TR2 are in series with fuse FU5 and FU6 respectively, output terminal L3 and L4 are respectively arranged with fuse FU7 and FU8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310084856.7A CN103163794B (en) | 2013-03-15 | 2013-03-15 | Blower fan, air lock, well heater interlock control apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310084856.7A CN103163794B (en) | 2013-03-15 | 2013-03-15 | Blower fan, air lock, well heater interlock control apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN103163794A CN103163794A (en) | 2013-06-19 |
| CN103163794B true CN103163794B (en) | 2016-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310084856.7A Active CN103163794B (en) | 2013-03-15 | 2013-03-15 | Blower fan, air lock, well heater interlock control apparatus |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982694A (en) * | 2014-04-29 | 2014-08-13 | 南通中远船务自动化有限公司 | Automatic switching-on/off device for fireproof pneumatic brake |
| CN108121264B (en) * | 2017-12-26 | 2023-10-10 | 广州地铁设计研究院股份有限公司 | Intelligent electric air valve control system and method applied to urban rail transit |
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| CN2084245U (en) * | 1990-09-19 | 1991-09-04 | 植良明 | Loss-of-phase protector for motor |
| JPH1163023A (en) * | 1997-08-28 | 1999-03-05 | Aisin Seiki Co Ltd | Viscous fluid joint device |
| CN201139894Y (en) * | 2007-07-17 | 2008-10-29 | 大连船舶重工集团电气有限公司 | Fire and gas control system |
| CN202121534U (en) * | 2011-06-13 | 2012-01-18 | 上海市东方海事工程技术有限公司 | Soft start control system of bowl type coal pulverizer |
| CN102749876A (en) * | 2011-04-21 | 2012-10-24 | 江苏天禹农业机械有限公司 | Controller special for two-section fire grain drier with multi-protection function |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2084245U (en) * | 1990-09-19 | 1991-09-04 | 植良明 | Loss-of-phase protector for motor |
| JPH1163023A (en) * | 1997-08-28 | 1999-03-05 | Aisin Seiki Co Ltd | Viscous fluid joint device |
| CN201139894Y (en) * | 2007-07-17 | 2008-10-29 | 大连船舶重工集团电气有限公司 | Fire and gas control system |
| CN102749876A (en) * | 2011-04-21 | 2012-10-24 | 江苏天禹农业机械有限公司 | Controller special for two-section fire grain drier with multi-protection function |
| CN202121534U (en) * | 2011-06-13 | 2012-01-18 | 上海市东方海事工程技术有限公司 | Soft start control system of bowl type coal pulverizer |
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