CN105317610A - Pneumatic interlocking protecting device of diesel engine for engineering machinery - Google Patents
Pneumatic interlocking protecting device of diesel engine for engineering machinery Download PDFInfo
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- CN105317610A CN105317610A CN201510479406.7A CN201510479406A CN105317610A CN 105317610 A CN105317610 A CN 105317610A CN 201510479406 A CN201510479406 A CN 201510479406A CN 105317610 A CN105317610 A CN 105317610A
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- pneumatic
- air motor
- diesel engine
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Abstract
Disclosed is a pneumatic interlocking protecting device of a diesel engine for engineering machinery. The pneumatic interlocking protecting device comprises an oil pressure joint, a two-position three-way reversing valve and a pneumatic control reversing valve. The oil pressure joint is connected between an diesel engine oil way and the two-position three-way reversing valve and used for detecting and outputting an oil pressure signal of diesel engine oil. The two-position three-way reversing valve is connected between the pneumatic control reversing valve and an air storing tank, and a valve core of the two-position three-way reversing valve acts under the control of the oil pressure signal so as to output an air pressure control signal. The pneumatic control reversing valve is connected between the air storing tank and a starting switch of an air motor, a valve core of the pneumatic control reversing valve acts under the action of the air pressure control signal output by the two-position three-way reversing valve so as to control connection or disconnection of an air way L2 where the starting switch is located, connection or disconnection of a starting air way of the air motor is further controlled, and finally the interlocking protecting function of the air motor is achieved. The pneumatic interlocking protecting device is used for a common air motor starting system, and damage to the air motor due to repeated misoperation of the air motor can be prevented.
Description
Technical field
The invention belongs to engineering machinery diesel engine realm, specifically a kind of Diesel Engines for Construction Machinery pneumatic interlocking protective gear.
Background technique
At present in most engineering machinery using diesel engine as its power plant.In the engineering machinery that some industry uses, because the environment of its work is comparatively special, the start mode of its power plant adopts pneumatic starting.Namely, after receiving starting order signal, engage to drive flywheel turns using pressurized air as the driving pinion of the air motor of working medium and the flywheel of diesel engine.When the rotating speed of flywheel reaches diesel engine starting critical speed of rotation, diesel engine starting success.Such as operator's operating habit is bad to there is some in practical application, diesel engine work under bad environment, the factors such as pneumatic system air pressure is not enough there will be the phenomenon that starting process repeats to press switch starter misoperation, cause air motor small gear because repeatedly starting and just on-stream flywheel are beaten tooth and damaged.
Summary of the invention
The object of the invention is to the above-mentioned deficiency that overcomes existing for prior art and a kind of Diesel Engines for Construction Machinery pneumatic interlocking protective gear is provided, can prevent air motor from repeating misoperation in regular air motor starting system and cause air motor to damage.
The technical solution adopted for the present invention to solve the technical problems is: comprise Oil-pressure joint, two-bit triplet selector valve, Pneumatic reversal valve.
Described Oil-pressure joint is connected between diesel engine oil oil circuit and two-bit triplet selector valve, for detecting and exporting diesel engine oil fuel injection pressure signal.
Described two-bit triplet selector valve is connected between Pneumatic reversal valve and gas holder, and spool action under the control of fuel injection pressure signal of two-bit triplet selector valve, to export control air pressure signal.
Described Pneumatic reversal valve is connected between gas holder and the switch starter of air motor; action under the effect of the control air pressure signal that the spool of Pneumatic reversal valve exports at two-bit triplet selector valve; to control the break-make of the gas circuit at switch starter place; and then control the break-make that air motor starts gas circuit, finally realize air motor interlock protection function.
Described Oil-pressure joint is connected with the gas control mouth K of two-bit triplet selector valve; The suction port P1 of described two-bit triplet selector valve provides the gas holder of source of the gas to be connected with for air motor work; The air outlet A1 of two-bit triplet selector valve is connected with the gas control mouth Z of described Pneumatic reversal valve; The suction port P2 of Pneumatic reversal valve is connected with gas holder; The air outlet A2 of Pneumatic reversal valve is connected with the suction port P3 of air motor switch starter.
The present invention controls the air pressure signal of two-bit triplet selector valve output by the diesel engine oil fuel injection pressure signal that Oil-pressure joint exports; the air pressure signal exported by two-bit triplet selector valve again controls the air pressure signal that Pneumatic reversal valve exports, and the air pressure signal finally exported by Pneumatic reversal valve is to control the break-make of the starting gas circuit at switch starter place to realize interlock protection function when air motor starts.
Accompanying drawing explanation
Fig. 1 is pneumatic system schematic diagram of the present invention.
Fig. 2 is each pneumatic element connection diagram of the present invention.
Fig. 3 is each element connection diagram of regular air motor starting system under prior art.
In figure, 1, Oil-pressure joint, 2, two-bit triplet selector valve, 3, Pneumatic reversal valve, 4, air motor switch starter, 5, air feeding apparatus, 6, air motor, 7, gas holder.
Embodiment
In Fig. 1, the present invention includes the two-bit triplet selector valve 2 of the Oil-pressure joint 1 and conversion fuel injection pressure signal detecting diesel engine oil fuel injection pressure signal, and the Pneumatic reversal valve 3 that the control air pressure signal exported by two-bit triplet selector valve 2 controls.
The control mouth K of the Oil-pressure joint 1 and two-bit triplet selector valve 2 that are arranged on diesel engine oil oil circuit is connected, and the suction port P1 of two-bit triplet selector valve 2 is connected with gas holder, and the air outlet A1 of two-bit triplet selector valve 2 is connected with the gas control mouth Z of Pneumatic reversal valve 3; The suction port P2 of Pneumatic reversal valve 3 is connected with gas holder, and the air outlet A2 of Pneumatic reversal valve 3 is connected with the suction port P3 of switch starter 4, and the air outlet A3 of switch starter 4 is connected with the gas control mouth O of air feeding apparatus 5; The suction port P4 of air feeding apparatus 5 is connected with gas holder, and the air outlet A4 of air feeding apparatus 5 is connected with air motor 6.
In Fig. 2, Fig. 3, the control air pipe line L2 of main air line L1 and control L1 break-make that the starting system of regular air motor comprises starting-air motor 6 forms.The present invention is on the basis of the starting system of regular air motor, control air pipe line L2 adds detects and export the Oil-pressure joint 1 of diesel engine oil fuel injection pressure signal, the two-bit triplet selector valve 2 of conversion fuel injection pressure signal and by external control signal to control the Pneumatic reversal valve 3 of spool action, this external control signal is the air pressure signal by two-bit triplet selector valve 2 output in the present invention.Two-bit triplet selector valve 2 and Pneumatic reversal valve 3 adopt the mode of series connection to be connected.Detected by Oil-pressure joint 1 and the output pressure signal of the diesel engine oil fuel injection pressure signal exported control two-bit triplet selector valve 2; the air pressure signal exported by two-bit triplet selector valve 2 again controls the air pressure signal that Pneumatic reversal valve 3 exports, and the air pressure signal finally exported by Pneumatic reversal valve 3 is to control the break-make of the starting gas circuit at switch starter 4 place to realize interlock protection function when air motor starts.
Two-bit triplet selector valve 2 is provided with the k mouth detecting external control pressure, and Pneumatic reversal valve 3 is provided with the z mouth detecting external pressure.The k mouth of two-bit triplet selector valve 2 connects diesel engine oil Oil-pressure joint 1(Oil-pressure joint 1 and communicates with the engine oil passage of diesel engine, export diesel engine oil fuel injection pressure signal), P1 mouth connects the source of the gas of gas holder as two-bit triplet selector valve 2, A1 mouth connects the Z mouth of Pneumatic reversal valve 3, R1 mouth, as relief opening, can connect a baffler; The suction port P2 of Pneumatic reversal valve 3 is connected with gas holder and is used as its source of the gas, and the air outlet A2 of Pneumatic reversal valve 3 is connected with the P3 mouth of air motor switch starter 4, and the relief opening R2 of Pneumatic reversal valve 3 can connect a baffler equally; The switch starter 4 of motor is a fingertip control formula two-bit triplet selector valve, and the A3 mouth of switch starter 4 is connected with the gas control mouth O of air feeding apparatus 5.Due to air motor start time, required pressurized air air pressure is higher, for safety, therefore adopts low-pressure air pipeline to control the mode of high pressure airline.Namely on the main air line L1 of starter motor, increase air feeding apparatus 5, the low-voltage control signal that exported by switch starter 4 controls the action of the spool of air feeding apparatus 5, and then controls the break-make of high pressure primer line L1 of motor.The suction port P4 of air feeding apparatus 5 connects gas holder, and the air outlet A4 of air feeding apparatus 5 connects air motor 6.
Before starting diesel engine, the spool of two-bit triplet selector valve 2, air motor switch starter 4, air feeding apparatus 5 is all in right position normal off state, and only Pneumatic reversal valve 3 spool is in right position, is normal open state.Switch starter 4 is pressed when starting diesel engine, switch starter 4 spool moves to left position, start and control gas circuit L2 connection, the control air of being drawn by gas holder arrives the control gas port O of air feeding apparatus 5 through Pneumatic reversal valve 3, switch starter 4, this control air makes the changeover valve core of air feeding apparatus 5 inside move to left position thus connects the starting gas circuit L1 of air motor 6, high-pressure air just enters air motor via starting gas circuit L1, driving air motor starts, drive diesel engine flywheel to rotate by the actuation gear of air motor again, thus start diesel engine.
Start successful diesel engine inside and establish certain engine oil pressure, this machine oil hydraulic is detected by the Oil-pressure joint 1 be arranged on engine oil passage and fuel injection pressure signal is exported to the control mouth K of two-bit triplet selector valve 2, and the spool action of two-bit triplet selector valve 2 is connected to the left position of two-bit triplet selector valve 2.The minimum engine oil pressure size of the power of two-bit triplet selector valve 2 spool action being depended on when diesel engine operates.When the left position of two-bit triplet selector valve 2 is connected, the control air pressure of the two-bit triplet selector valve 2 of being drawn by gas holder is exported by two-bit triplet selector valve 2 and arrives the gas control mouth Z of Pneumatic reversal valve 3, make the spool of Pneumatic reversal valve 3 move to left position, Pneumatic reversal valve 3 transfers normal off state to from normal open state.Now, the place gas circuit L2 of the switch starter 4 of air motor is cut off, and when attempting the button again pressing switch starter 4, the spool of air feeding apparatus 5 is because air pressure out of hand and cannot action, the starting gas circuit L1 of air motor just cannot connect, and air motor just cannot start again.Doing so avoids because repeating to press air motor small gear that switch starter causes and flywheel is beaten tooth and damaged.
Claims (2)
1. a Diesel Engines for Construction Machinery pneumatic interlocking protective gear, is characterized in that: comprise Oil-pressure joint (1), two-bit triplet selector valve (2), Pneumatic reversal valve (3);
Described Oil-pressure joint (1) is connected between diesel engine oil oil circuit and two-bit triplet selector valve (2);
Described two-bit triplet selector valve (2) is connected between Pneumatic reversal valve (3) and gas holder (7);
Described Pneumatic reversal valve (3) is connected between the switch starter (4) of gas holder (7) and air motor.
2. Diesel Engines for Construction Machinery pneumatic interlocking protective gear according to claim 1, is characterized in that: described Oil-pressure joint (1) is connected with the gas control mouth K of two-bit triplet selector valve (2); The suction port P1 of described two-bit triplet selector valve (2) is connected with providing the gas holder of source of the gas (7) for air motor work; The air outlet A1 of two-bit triplet selector valve (2) is connected with the gas control mouth Z of described Pneumatic reversal valve (3); The suction port P2 of Pneumatic reversal valve (3) is connected with gas holder (7); The air outlet A2 of Pneumatic reversal valve (3) is connected with the suction port P3 of air motor switch starter (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510479406.7A CN105317610A (en) | 2015-08-03 | 2015-08-03 | Pneumatic interlocking protecting device of diesel engine for engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510479406.7A CN105317610A (en) | 2015-08-03 | 2015-08-03 | Pneumatic interlocking protecting device of diesel engine for engineering machinery |
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| Publication Number | Publication Date |
|---|---|
| CN105317610A true CN105317610A (en) | 2016-02-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510479406.7A Pending CN105317610A (en) | 2015-08-03 | 2015-08-03 | Pneumatic interlocking protecting device of diesel engine for engineering machinery |
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| CN (1) | CN105317610A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110949364A (en) * | 2019-12-29 | 2020-04-03 | 刘剑 | Vehicle start control device |
Citations (8)
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|---|---|---|---|---|
| JP3562944B2 (en) * | 1997-10-09 | 2004-09-08 | ダイハツディーゼル株式会社 | Safety device for starting motor |
| CN101318539A (en) * | 2008-05-19 | 2008-12-10 | 天津大学 | Diagnosis method for system fault of ship air start |
| WO2009125542A1 (en) * | 2008-04-08 | 2009-10-15 | 川崎重工業株式会社 | Method and device for starting engine |
| CN201386613Y (en) * | 2009-04-23 | 2010-01-20 | 南车戚墅堰机车有限公司 | Dual air motor starting device for diesel engine |
| WO2012171049A1 (en) * | 2011-06-17 | 2012-12-20 | Ge Jenbacher Gmbh & Co Ohg | Method for starting an internal combustion engine |
| CN202971008U (en) * | 2012-11-21 | 2013-06-05 | 沈阳北方重矿机械有限公司 | Safe starting protection device of pneumatic motor |
| CN103364194A (en) * | 2012-03-28 | 2013-10-23 | 南车戚墅堰机车有限公司 | Diesel engine test station air starting system |
| CN204827753U (en) * | 2015-08-03 | 2015-12-02 | 湖北江山专用汽车有限公司 | Diesel engine pneumatic interlocking protection device for engineering machinery |
-
2015
- 2015-08-03 CN CN201510479406.7A patent/CN105317610A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3562944B2 (en) * | 1997-10-09 | 2004-09-08 | ダイハツディーゼル株式会社 | Safety device for starting motor |
| WO2009125542A1 (en) * | 2008-04-08 | 2009-10-15 | 川崎重工業株式会社 | Method and device for starting engine |
| CN101318539A (en) * | 2008-05-19 | 2008-12-10 | 天津大学 | Diagnosis method for system fault of ship air start |
| CN201386613Y (en) * | 2009-04-23 | 2010-01-20 | 南车戚墅堰机车有限公司 | Dual air motor starting device for diesel engine |
| WO2012171049A1 (en) * | 2011-06-17 | 2012-12-20 | Ge Jenbacher Gmbh & Co Ohg | Method for starting an internal combustion engine |
| CN103364194A (en) * | 2012-03-28 | 2013-10-23 | 南车戚墅堰机车有限公司 | Diesel engine test station air starting system |
| CN202971008U (en) * | 2012-11-21 | 2013-06-05 | 沈阳北方重矿机械有限公司 | Safe starting protection device of pneumatic motor |
| CN204827753U (en) * | 2015-08-03 | 2015-12-02 | 湖北江山专用汽车有限公司 | Diesel engine pneumatic interlocking protection device for engineering machinery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110949364A (en) * | 2019-12-29 | 2020-04-03 | 刘剑 | Vehicle start control device |
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Application publication date: 20160210 |
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