CN1904595B - Variable sampling volume filter paper type smoke meter - Google Patents
Variable sampling volume filter paper type smoke meter Download PDFInfo
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- CN1904595B CN1904595B CN200610069622A CN200610069622A CN1904595B CN 1904595 B CN1904595 B CN 1904595B CN 200610069622 A CN200610069622 A CN 200610069622A CN 200610069622 A CN200610069622 A CN 200610069622A CN 1904595 B CN1904595 B CN 1904595B
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Abstract
The invention relates to a filter paper type smoke meter that is sampling volume alterable. It is made up of air bleeding cylinder, filter paper and filter paper frame, blackness testing and display device, paper advance mechanism structure. The air bleeding cylinder connects to stepping cylinder and the flanges of the front cover board connecting with each other by bolt. Springing is set between two flanges. The piston rod in stepping cylinder is connected to the air bleeding cylinder. Contact switch is set on the back cover board of the pumping cylinder. The benefit of the invention is that: when the smoke thickness is low in exhaust of diesel engine, the measuring error could decrease 3-50 times and also ensure the error at high smoke thickness being very low.
Description
Technical field
The present invention relates to a kind of smoke intensity proving installation, specifically a kind of filter type smokemeter of variable sampling volume.
Background technology
We know that present known filter type smokemeter all uses the constant volume type smokemetor.Smokemetor by suction cylinder, filter paper and filter paper frame, dye blackness detection and display device, paper advance mechanism etc. and form.When suction cylinder was bled, probe, stopple coupon, the filtration filter paper of diesel engine part exhaust in being installed in Diesel Engine Exhaust Pipe entered suction cylinder, and the soot in the diesel exhaust gas is got off by filter paper filtering, the filter paper blackening.Photometer irradiation filter paper, the reflectance of measurement filter paper calculates smoke intensity value.At present filter type smokemeter all adopts the suction cylinder of deciding pump down volume, and the domestic pump down volume that all adopts is the suction cylinder of 330mL, and it is the suction cylinder of 1L that 409 smokemetors of Austrian AVL company adopt pump down volume.But along with the diesel emission rules are more and more strict, the smoke intensity of diesel engine under steady state condition significantly reduces, general maximum smoke intensity is less than 1.0BOSCH unit, the stable state smoke intensity of most of diesel engine is less than 0.5BOSCH unit, the stable state smoke intensity of some low-emission diesels is less than 0.2BOSCH unit, and the indicating value of smokemetor full scale is a 10.0BOSCH unit.Because now soot concentration is very little in the diesel exhaust gas, thereby the blackness of filter paper is very little when adopting the smokemetor of 330mL pump down volume to test at every turn, and the accuracy of smoke measurement significantly reduces, and error is very big.It was reported that adopt the filter type smokemeter of 1.0L pump down volume, when the diesel exhaust gas smoke intensity was 0.6-5BOSCH unit, its relative error was ± 2%.And when the diesel exhaust gas smoke intensity was 0.3BOSCH unit, its relative error was 9.2%, and when the diesel exhaust gas smoke intensity was 0.2BOSCH unit, its relative error was 22.0% (operation manuals of AVL 409 smokemetors).The error of FBY smokemetor is 0.3BOSCH unit (FBY series diesel vehicle smokemetor instructions), and the relative error when measuring very little smoke intensity is very big, is fit to use.Because the stable state exhaust smoke of diesel engine is very low at present, the smoke intensity of the diesel engine of the more low emission of researching and developing is lower, thereby utilizing the measuring relative errors of existing 330mL and 1.0L pump down volume smokemetor very big, the smokemetor of existing 330mL and 1.0L pump down volume can not satisfy the needs of diesel engine manufacturer and relevant department at all.
Summary of the invention
The present invention is for overcoming above-mentioned the deficiencies in the prior art, and a kind of filter type smokemeter of simple in structure, easy to operate, variable sampling volume that measuring accuracy is high is provided.
The objective of the invention is to adopt following technical proposals to realize: a kind of filter type smokemeter of variable sampling volume, mainly by suction cylinder, filter paper and filter paper frame, dye blackness detection and display device, paper advance mechanism is formed, suction cylinder is connected with stepping cylinder, both separately the flange on the front shroud be inter-connected via a bolt joint, between two flanges, be provided with elastic device, the interior piston of bleeding of piston rod in the stepping cylinder and suction cylinder is connected, and the suction cylinder back shroud is provided with contact switch.
Described stepping cylinder is the cylinder block that some pistons are cascaded, and is equipped with gag lever post in each piston, and each piston is connected with each self-corresponding solenoid directional control valve respectively, adopts the O-ring seal sealing between each piston and the cylinder sleeve.
Described elastic device is the elasticity adapter sleeve.
Described elastic device is a spring.
During zeroing, by regulating the distance between stepping cylinder front end face flange and suction cylinder end face flange, elasticity of compression adapter sleeve or spring make that suction cylinder also is in 0 when stepping cylinder is in 0.
A kind of filter type smokemeter of variable sampling volume, mainly by suction cylinder, filter paper and filter paper frame, dying blackness detects and display device, paper advance mechanism is formed, suction cylinder is connected with stepping cylinder, the stepping cylinder front shroud directly is fixed on the forward flange plate of suction cylinder, the back shroud of stepping cylinder is connected with the stepping cylinder cylinder sleeve by screw thread, the stepping cylinder back shroud is connected with stepping cylinder front shroud or suction cylinder front shroud with bolt by pressing plate, the interior piston of bleeding of piston rod in the stepping cylinder and suction cylinder is connected, and the suction cylinder back shroud is provided with contact switch.
Described stepping cylinder is the cylinder block that some pistons are cascaded, and is equipped with gag lever post in each piston, and each piston is connected with each self-corresponding solenoid directional control valve respectively, adopts the O-ring seal sealing between each piston and the cylinder sleeve.
During zeroing,, regulate the position of stepping cylinder rearmost end piston gag lever post by regulating the position of stepping cylinder back shroud, thus the zero-bit of bleeding regulating cylinder piston.
Suction cylinder of the present invention adopts common light-duty cylinder, piston motion during impulse stroke, volume in the suction cylinder increases, negative pressure in the cylinder increases, part waste gas in the Diesel Engine Exhaust Pipe through stopple coupon, filters filter paper by being installed in the sampling probe in the Diesel Engine Exhaust Pipe, water condenser, cylinder air inlet enters suction cylinder.Control cylinder adopts the stepping cylinder (digital cylinder) of many pistons.By the inlet and outlet of each plunger shaft of control step cylinder, can make the stroke difference of stepping cylinder piston rod, drive suction cylinder, make the pump down volume difference of suction cylinder, realize becoming the function of pump down volume.When the diesel engine smoke intensity is very little, the inlet and outlet of each plunger shaft of control step cylinder, make the stroke maximum of stepping cylinder, the stroke maximum of suction cylinder, the pump down volume maximum of suction cylinder, just more at the black smoke that filters under filtering on the filter paper like this, just bigger with the smoke intensity displayed value that dyes the measurement of blackness pick-up unit, and the measuring error of smoke intensity displayed value when the 5.0BOSCH unit left and right sides is less.By being converted into the smoke intensity of 330mL pump down volume, can accurately measure the exhaust smoke under the low smoke intensity indicating value.As adopt the stepping cylinder of 3 pistons, and its piston rod position has 7 positions (not comprising 0), and promptly the stroke of suction cylinder has 7 positions, and the pump down volume of suction cylinder also has 7 different volumes.If the volume of pump down volume when primary importance is V, then the pump down volume when range is 7V, and the amount of soot under filtering on the filter paper like this is rate of air sucked in required 7 times when being V, and the precision of measuring the filter paper smoke intensity like this just significantly improves.
The invention has the beneficial effects as follows that at the exhaust smoke of institute's test diesel engine hour, the measuring error of exhaust smoke can reduce 3-50 doubly, can also guarantee that the error of institute's diesel exhaust gas smoke intensity of surveying than greatly the time is also very little simultaneously.
Description of drawings
Fig. 1 is the embodiment of the invention 1 cross-sectional view;
Fig. 2 is cross-sectional view during maximum sampling volume state in the embodiment of the invention 1;
Fig. 3 is the embodiment of the invention 2 cross-sectional view;
2. piston a among the figure, 3. solenoid directional control valve a, 4. piston b, 5. solenoid directional control valve b, 6. solenoid directional control valve c, 7. piston rod, 8. stepping cylinder front shroud, 9. coupling bolt, 11. elasticity adapter sleeve or springs, 12. suction cylinder front shroud, 13. adjustable damper valve, 15, the piston of bleeding, 17. air admission holes, 18. suction cylinder back shroud, 20.. contact switch, 21. stepping cylinder back shrouds, 22. O-ring seals, 23. piston c gag lever post, 24. piston c, 25. piston b gag lever posts, 26. stepping cylinder cylinder jacket, 27. piston a gag lever post, 28. stepping cylinder pressing plates.
Embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment 1: in Fig. 1, stepping cylinder has adopted 3 pistons, also can adopt more pistons, piston a2, the stroke of piston b4 and piston c24. piston a2 is S, the stroke of piston b4 is 2S, the stroke of piston c24 is a 4S (general piston 1,2,3 stroke is the multiple relation, also can not be the multiple relation), the travel position of its piston rod 7 does not comprise that 0 has 7 like this. cooperate between each piston and the cylinder sleeve 26, all adopt O-ring seal 22 to seal. the action of each piston is respectively by coupled solenoid directional control valve a3, solenoid directional control valve b5, solenoid directional control valve c6 control, solenoid directional control valve a3, solenoid directional control valve b5, solenoid directional control valve c6 connects pressure-air and atmosphere.
A straight-through low-pressure gas in the cylinder of piston c24 the right, as solenoid directional control valve a3, solenoid directional control valve b5, when solenoid directional control valve c6 leads to pressure-air, piston a2 then, piston b4, piston c24 moves right under the effect of pressure reduction, respectively with piston a gag lever post 27, piston b gag lever post 25 and piston c gag lever post 23 are collided, at this moment the position of piston rod 7 is at rightmost, the piston 15 of bleeding that piston rod 7 drives suction cylinder moves to rightmost position, by adjusting coupling bolt 9 elasticity of compression adapter sleeves or spring 11, can be so that the piston 15 of bleeding have just contacted with suction cylinder back shroud 18, contact switch 20 is connected, indicate the piston 15 of bleeding to be in 0, as shown in Figure 1.
When having only solenoid directional control valve a3 commutation to lead to atmosphere, then the pressure in the piston a2 chamber becomes 0, because piston c24 right side is a low pressure, pressure in the piston b4 chamber still is high pressure, then piston a2 is moved to the left under the effect of pressure reduction, up to contacting with stepping cylinder back shroud 21, displacement is S, while piston a2 moves drive piston b4 and piston c24 is moved to the left the S distance simultaneously, the stepping cylinder piston rod 7 and the piston 15 of bleeding are moved to the left simultaneously, displacement is S, engine exhaust enters in the suction cylinder chamber by air admission hole 17 through behind the filter paper filtering, pump down volume is V, adjustable damper valve 13 guarantees that the movement velocity of suction cylinder piston 15 is basicly stable, and the aperture of regulating orifice valve 13 can be controlled the movement velocity of suction cylinder, gets final product the time of bleeding regulating.
When having only solenoid directional control valve b5 commutation to lead to atmosphere, then the pressure in the piston b4 chamber become 0, because piston c24 right side one straight-through low-pressure gas, pressure in the piston c24 chamber still is high pressure, then piston b4 is moved to the left under the effect of pressure reduction, up to contacting with piston a2, displacement is 2S, piston b4 drives piston c24 and is moved to the left the 2S distance simultaneously, stepping cylinder piston rod 7 and suction cylinder piston 15 are moved to the left simultaneously, displacement is 2S, engine exhaust enters in the suction cylinder chamber by air admission hole 17 through behind the filter paper filtering, and pump down volume is 2V.
When solenoid directional control valve a3 and solenoid directional control valve b5 commutate when leading to atmosphere simultaneously, then the pressure in piston a2 and the piston b4 chamber all becomes 0 simultaneously, because piston c24 right side is a low pressure always, pressure in the piston c24 chamber still is high pressure, then piston b4 at first is moved to the left under the effect of pressure reduction, contact back drive piston a2 continues to be moved to the left with piston a2, up to contacting with stepping cylinder back shroud 21, moving total distance is 3S, piston b4 drives piston c24 and is moved to the left the 3S distance simultaneously, the stepping cylinder piston rod 7 and the piston 15 of bleeding are moved to the left simultaneously, displacement is 3S, engine exhaust enters in the suction cylinder chamber by air admission hole 17 through behind the filter paper filtering, and pump down volume is 3V.
When having only solenoid directional control valve c6 commutation to lead to atmosphere, then the pressure in the piston c24 chamber become 0, because piston c24 right side is a low pressure, then piston c24 is moved to the left under the effect of pressure reduction, up to contacting with piston b4, displacement is 4S, and the stepping cylinder piston rod 7 and the piston 15 of bleeding are moved to the left simultaneously, and displacement is 4S, engine exhaust enters in the suction cylinder chamber by air admission hole 17 through behind the filter paper filtering, and pump down volume is 4V.
In like manner, when solenoid directional control valve a3 and solenoid directional control valve c6 commutated logical atmosphere simultaneously, pump down volume was 5V.When solenoid directional control valve b5 and solenoid directional control valve c6 commutated logical atmosphere simultaneously, pump down volume was 6V.When solenoid directional control valve a3, solenoid directional control valve b5 and solenoid directional control valve c6 commutated logical atmosphere simultaneously, pump down volume was 7V.
Fig. 2 is the structural drawing of the variable sampling volume filter type smokemeter sampling apparatus when solenoid directional control valve a3, solenoid directional control valve b5 and solenoid directional control valve c6 commutate logical atmosphere simultaneously of first embodiment of the invention.Piston a2, piston b4 and piston c24 all are in leftmost position among the figure, and the piston 15 of bleeding also is in leftmost position, i.e. maximum travel position, and maximum sampling volume is 7V.
By the action of control solenoid directional control valve a3, solenoid directional control valve b5 and solenoid directional control valve c6, can control the pump down volume of suction cylinder like this.Pump down volume is bigger, by the pump down volume of filter paper and the engine exhaust soot quality under the filter paper filtering the more.In the engine smoke intensity hour, adopt bigger pump down volume, the soot quality under the filter paper filtering that can be multiplied significantly improves the measuring accuracy of soot.
When stepping cylinder adopted n piston, the stroke of stepping cylinder had 2
nIndividual (comprising 0), corresponding pump down volume also can be changed into 1V-(2
n-1) V generally adopts 3 or 4 pistons to get final product.
Embodiment 2: as shown in Figure 3, it regulates the mode difference of zero-bit as different from Example 1.Resilient sleeve or spring 11 among the embodiment 1 have been removed, stepping cylinder front shroud 8 directly is fixed on the forward flange plate of suction cylinder, stepping cylinder back shroud 21 is connected with the stepping cylinder steel bushing by screw thread, by regulating the position of stepping cylinder back shroud 21, the position of regulating piston a gag lever post 27, thereby the zero-bit of bleeding regulating piston 15.Stepping cylinder back shroud 21 is connected on stepping cylinder front shroud 8 or the suction cylinder front shroud 12 by stepping cylinder pressing plate 28 usefulness bolts.
Claims (4)
1. the filter type smokemeter of a variable sampling volume, mainly by suction cylinder, filter paper and filter paper frame, dye blackness detection and display device, paper advance mechanism is formed, it is characterized in that: suction cylinder is connected with stepping cylinder, be respectively equipped with flange on the front shroud of aforementioned two cylinders, two flanges are inter-connected via a bolt joint, be provided with elastic device between two flanges, the interior piston of bleeding of the piston rod in the stepping cylinder and suction cylinder is connected, and the suction cylinder back shroud is provided with contact switch; Stepping cylinder is the cylinder block that some pistons are cascaded, and is equipped with gag lever post in each piston, and each piston is connected with each self-corresponding solenoid directional control valve respectively, adopts the O-ring seal sealing between each piston and the cylinder sleeve.
2. the filter type smokemeter of a kind of variable sampling volume according to claim 1, it is characterized in that: described elastic device is the elasticity adapter sleeve.
3. the filter type smokemeter of a kind of variable sampling volume according to claim 1, it is characterized in that: described elastic device is a spring.
4. the filter type smokemeter of a variable sampling volume, mainly by suction cylinder, filter paper and filter paper frame, dying blackness detects and display device, paper advance mechanism is formed, it is characterized in that: suction cylinder is connected with stepping cylinder, the stepping cylinder front shroud directly is fixed on the forward flange plate of suction cylinder, the back shroud of stepping cylinder is connected with the stepping cylinder steel bushing by screw thread, the stepping cylinder back shroud is connected with stepping cylinder front shroud or suction cylinder front shroud with bolt by pressing plate, the interior piston of bleeding of piston rod in the stepping cylinder and suction cylinder is connected, and the suction cylinder back shroud is provided with contact switch; Stepping cylinder is the cylinder block that some pistons are cascaded, and is equipped with gag lever post in each piston, and each piston is connected with each self-corresponding solenoid directional control valve respectively, adopts sealing gasket Mi Quan between each piston and the cylinder sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610069622A CN1904595B (en) | 2006-07-28 | 2006-07-28 | Variable sampling volume filter paper type smoke meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610069622A CN1904595B (en) | 2006-07-28 | 2006-07-28 | Variable sampling volume filter paper type smoke meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1904595A CN1904595A (en) | 2007-01-31 |
| CN1904595B true CN1904595B (en) | 2010-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610069622A Expired - Fee Related CN1904595B (en) | 2006-07-28 | 2006-07-28 | Variable sampling volume filter paper type smoke meter |
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| Country | Link |
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| CN (1) | CN1904595B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111577686B (en) * | 2020-05-18 | 2022-03-29 | 广东志成电液科技有限公司 | Stepping hydraulic equipment and control method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988009492A1 (en) * | 1987-05-19 | 1988-12-01 | Avl Gesellschaft Für Verbrennungskraftmaschinen Un | Process and device for determining the soot content of flue gases |
| CN2080669U (en) * | 1990-09-17 | 1991-07-10 | 佛山分析仪器厂 | Full-automatic smokemeter |
| WO2004104576A1 (en) * | 2003-05-23 | 2004-12-02 | Sensatronic Gmbh | Device for conveying a fluid volume, device and method for the analysis thereof |
| CN2662235Y (en) * | 2003-12-13 | 2004-12-08 | 庞抗美 | A filter paper type smokemeter |
| CN2727726Y (en) * | 2004-04-14 | 2005-09-21 | 佛山市瑞谱分析仪器有限公司 | A filter paper smoke meter |
| CN2935135Y (en) * | 2006-07-28 | 2007-08-15 | 山东大学 | Filter paper smoke meter with variable sampling volume |
-
2006
- 2006-07-28 CN CN200610069622A patent/CN1904595B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988009492A1 (en) * | 1987-05-19 | 1988-12-01 | Avl Gesellschaft Für Verbrennungskraftmaschinen Un | Process and device for determining the soot content of flue gases |
| CN2080669U (en) * | 1990-09-17 | 1991-07-10 | 佛山分析仪器厂 | Full-automatic smokemeter |
| WO2004104576A1 (en) * | 2003-05-23 | 2004-12-02 | Sensatronic Gmbh | Device for conveying a fluid volume, device and method for the analysis thereof |
| CN2662235Y (en) * | 2003-12-13 | 2004-12-08 | 庞抗美 | A filter paper type smokemeter |
| CN2727726Y (en) * | 2004-04-14 | 2005-09-21 | 佛山市瑞谱分析仪器有限公司 | A filter paper smoke meter |
| CN2935135Y (en) * | 2006-07-28 | 2007-08-15 | 山东大学 | Filter paper smoke meter with variable sampling volume |
Non-Patent Citations (2)
| Title |
|---|
| 吴碧金, 苏锦树.双行程集成气缸的设计及动态特性研究.集美大学学报10 3.2005,10(3),257-260. |
| 吴碧金, 苏锦树.双行程集成气缸的设计及动态特性研究.集美大学学报10 3.2005,10(3),257-260. * |
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| CN1904595A (en) | 2007-01-31 |
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Granted publication date: 20100512 Termination date: 20130728 |