CN201228603Y - Time-delay starting protection arrangement for diesel engine - Google Patents
Time-delay starting protection arrangement for diesel engine Download PDFInfo
- Publication number
- CN201228603Y CN201228603Y CNU200820014414XU CN200820014414U CN201228603Y CN 201228603 Y CN201228603 Y CN 201228603Y CN U200820014414X U CNU200820014414X U CN U200820014414XU CN 200820014414 U CN200820014414 U CN 200820014414U CN 201228603 Y CN201228603 Y CN 201228603Y
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- China
- Prior art keywords
- time
- branch road
- diesel engine
- relay
- starting
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- Expired - Fee Related
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Abstract
The utility model relates to a time-delay starting protection device for a diesel engine, which comprises a starting button, a stop button, an intermediate relay and a starting motor controller. A time delay relay is arranged, the coil KT of the time delay relay is connected with the normally open contacts of the intermediate relay in series to form a time delay branch circuit, and the contact KT1 of the time delay relay is connected with the middle points of a shutdown branch circuit and the time delay branch circuit. The mandatory requirement for the starting time interval each time for the diesel engine can be met by the method that the compulsory protection of the time relay is added in the control loop of the diesel engine, so that the phenomenon of incorrect manipulation of the operators is avoided.
Description
Technical field
The utility model belongs to the Diesel Engine Control technical field, relates in particular to a kind of novel diesel engine delayed firing protective gear.
Background technique
In the experimental stage and using process of diesel engine, explosion easily takes place in the silencing apparatus in the diesel exhaust gas pipeline in the machine that repeatedly the rises process of diesel engine, to the quality safety generation threat of Field Force's life safety and diesel engine, is major safety risks.
Have following reason can cause " oil gas " detonation in the diesel engine exhaust system and cause gas sharply to expand, powerful air-flow is being to flow back in the silencing apparatus of assisting to choke eliminating the noise based on reactive muffling structure, resistive structure, and pressure rises sharply and causes the silencing apparatus explosion:
1, the resistance of vent systems is made of two-part: pipe resistance (by how much constituting of the length of straight tube, elbow) and parts resistance (silencing apparatus or miscellaneous part), if the resistance of vent systems is bigger, the oil gas circulation is not smooth, then easily is collected in pipeline and the parts.
2, gas content is 2.0% in the diesel oil oil gas lower explosion limit air, that is to say, if contain 2.0% diesel oil oil gas in the air, as long as there is a spark to set off an explosion.
3, because Mars may be nearer from diesel engine when playing machine, if near gas concentration is suitable for explosion condition, the gas of detonation then, along the pipeline preshoot, arrival silencing apparatus place air-flow returns chokes, and the kinetic energy of gas becomes the pressure energy immediately, pressure raises rapidly, forms pressure wave, causes the silencing apparatus explosion.
When 4, diesel engine was swept cylinder, if top petrol tank is arranged, fuel oil also can enter diesel engine under the effect of its gravity, may make a part of atomized diesel fuel enter gas exhaust piping and silencing apparatus.
5, air motor starting diesel engine failure, partly atomized diesel oil enters gas exhaust piping and silencing apparatus, more residual " oil gas ".
At the above-mentioned reason that may cause the silencing apparatus explosion; except the structure of improving baffler and diesel engine exhaust system and note the safety production measures of gas concentration and Mars in the air; the method that certain interval of time is restarted after can shutting down by diesel engine at every turn reduces gathering of vent systems " oil gas ", prolongs the cohesion and the sedimentation time of the oil droplet in " oil gas ".But in specific operation, the operator still can often ignore this point, and misoperation makes the time lag of twice machine too short, thereby accidents caused.
Summary of the invention
The purpose of this utility model overcomes the deficiency of above-mentioned prior art exactly, and a kind of diesel engine delayed firing protective gear that diesel engine plays the machine time lag, avoids the human operational error of forcing to limit is provided.
The purpose of this utility model is existing like this: a kind of diesel engine delayed firing protective gear; by starting button; stop botton; auxiliary reclay; actuating motor constitutes; (1 of starting button QA; 2) with the normally-closed contact KA1 of auxiliary reclay KA; starter motor QD series connection constitutes the starting branch road; (3 of starting button QA; 4) with after the normally opened contact KM1 of oil feed pump relay K M is in parallel; connect with normally-closed contact KA2 and the oil feed pump relay coil KM of auxiliary reclay KA; constitute the fuel feeding branch road; stop botton is connected with auxiliary reclay coil KA to constitute and is shut down branch road; it is characterized in that being provided with time delay relay; time delay breaker coil KT connects with the auxiliary reclay normally opened contact and constitutes the time-delay branch road, and time delay relay contact KT1 will shut down the mid point of branch road and the mid point of time-delay branch road couples together.
The technical solution of the utility model realizes the mandatory requirement of the each starting time interval of diesel engine by the method that adds the rigid protection of time relay in the Diesel Engine Control loop, has avoided operator's misoperation phenomenon.
Description of drawings
Accompanying drawing 1 is the utility model embodiment's a circuit diagram.
Embodiment
Referring to Fig. 1, diesel engine delayed firing protective gear of the present utility model, (1,2) point of starting button QA are connected with auxiliary reclay normally-closed contact KA1, actuating motor QD and are constituted the starting branch road.Starting button QA (3,4) point is with after the normally opened contact KM1 of oil feed pump relay K M is in parallel; connect with normally-closed contact KA2 and the oil feed pump relay coil KM of auxiliary reclay KA; constitute the fuel feeding branch road, stop botton TA connects with auxiliary reclay coil KA to constitute and shuts down branch road.Time delay relay KT connects with auxiliary reclay normally opened contact KA2 and constitutes the time-delay branch road.Be connected on the power supply after starting branch road, shutdown branch road and the parallel connection of time-delay branch road.Time delay relay contact KT1 will shut down the mid point of branch road and the mid point of time-delay branch road couples together.
When starting for the first time, press starting button QA, starting branch road and fuel feeding branch road conducting work.When shutting down, press stop botton TA, shut down the branch road conducting, auxiliary reclay work, normally-closed contact KA1, KA2 disconnect, starting branch road and the outage of fuel feeding branch road; Simultaneously, normally opened contact KA3 closure, the conducting of time-delay branch road.Between time delay, normally-closed contact KA1, KA2 keep off state, and normally opened contact KA3 is kept closed.At this moment, even press start button QA, starting branch road and fuel feeding branch road can not conductings, thereby can't start.After time-delay finished, delayed contact KT1 disconnected, auxiliary reclay coil KA outage, and normally-closed contact KA1, KA2 closure, normally opened contact KA3 disconnects.At this moment, press starting button QA again, starting branch road and fuel feeding branch road just can conductings.
Claims (1)
1; a kind of diesel engine delayed firing protective gear; by starting button; stop botton; auxiliary reclay; actuating motor constitutes; (1 of starting button QA; 2) with the normally-closed contact KA1 of auxiliary reclay KA; actuating motor QD series connection constitutes the starting branch road; (3 of starting button QA; 4) with after the normally opened contact KM1 of oil feed pump relay K M is in parallel; connect with normally-closed contact KA2 and the oil feed pump relay coil KM of auxiliary reclay KA; constitute the fuel feeding branch road; stop botton is connected with auxiliary reclay coil KA to constitute and is shut down branch road; it is characterized in that being provided with time delay relay; time delay breaker coil KT connects with the auxiliary reclay normally opened contact and constitutes the time-delay branch road, and time delay relay contact KT1 will shut down the mid point of branch road and the mid point of time-delay branch road couples together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820014414XU CN201228603Y (en) | 2008-07-23 | 2008-07-23 | Time-delay starting protection arrangement for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820014414XU CN201228603Y (en) | 2008-07-23 | 2008-07-23 | Time-delay starting protection arrangement for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201228603Y true CN201228603Y (en) | 2009-04-29 |
Family
ID=40633554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820014414XU Expired - Fee Related CN201228603Y (en) | 2008-07-23 | 2008-07-23 | Time-delay starting protection arrangement for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201228603Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104477043A (en) * | 2014-11-14 | 2015-04-01 | 中国北车集团大连机车车辆有限公司 | DC power source time-delay supply circuit of urban rail vehicle |
| CN105508115A (en) * | 2015-11-28 | 2016-04-20 | 中国北车集团大连机车车辆有限公司 | Electric starting control circuit of diesel engine |
-
2008
- 2008-07-23 CN CNU200820014414XU patent/CN201228603Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104477043A (en) * | 2014-11-14 | 2015-04-01 | 中国北车集团大连机车车辆有限公司 | DC power source time-delay supply circuit of urban rail vehicle |
| CN105508115A (en) * | 2015-11-28 | 2016-04-20 | 中国北车集团大连机车车辆有限公司 | Electric starting control circuit of diesel engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090429 Termination date: 20170723 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |