CN103291423A - Reducing-agent supply device - Google Patents
Reducing-agent supply device Download PDFInfo
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- CN103291423A CN103291423A CN201310233879XA CN201310233879A CN103291423A CN 103291423 A CN103291423 A CN 103291423A CN 201310233879X A CN201310233879X A CN 201310233879XA CN 201310233879 A CN201310233879 A CN 201310233879A CN 103291423 A CN103291423 A CN 103291423A
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- Prior art keywords
- cylindrical filter
- reducing agent
- reducing
- supply device
- feeding device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention discloses a reducing-agent supply device which comprises a supply device body, a cylindrical filter, a supply pump, an inverse suction pump and a two-position two-way switching valve. The reducing-agent supply device is characterized in that the cylindrical filter is transversely installed in the supply device body, a floor drain type emptying flow channel is installed at a tangential of the circumferential bottommost end of the cylindrical filter, the floor drain type emptying flow channel is connected with the inverse suction pump through the two-position two-way switching valve, and the supply pump is communicated with the inner cavity of the cylindrical filter through a supply pipe. According to the feature structure of the reducing-agent supply device, reducing agent can be gathered in the floor drain type emptying flow channel, thorough discharging is achieved, and meanwhile the direction in which the reducing agent flows through the filter will not be changed. The reducing-agent supply device is simple and effective in structure, and does not need compressed air. In addition, the cylindrical filter is installed transversely, disassembly is convenient, and the reducing agent will not be easily leaked to pollute the environment in disassembly and replacement processes of the filter.
Description
Technical field
The present invention relates to a kind of reducer feeding device, before need quitting work for SCR system reducer feeding device reducing agent is wherein thoroughly emptied.
Background technique
Increasingly serious along with environmental problem and energy crisis, the Abgasgesetz increasingly stringent, increasing energy-conserving and emission-cutting technology is used on the vehicle, wherein the SCR(selective catalytic reduction) technology is a kind of technology that reduces the oxynitrides discharging.The SCR technology is exactly that reducing agent is sprayed in the waste gas stream of motor, afterwards reducing agent in the SCR catalytic converter with waste gas in the oxynitrides reaction generate the nitrogen G﹠W, thereby reach the purification purpose.But reducing agent can freeze or crystallization when temperature was low, stopped up supplier inner volume and runner, so needed to empty processing before the reducer feeding device use end.
At present, after using under the low temperature environment, reducing agent need empty processing because freezing to stop up supplier inner volume and runner with crystallization before supplier quits work for fear of the SCR system.Major part on the market in the reducer feeding device helps the formula product for gas, adopts the auxiliary method that empties of pressurized gas, namely utilizes vehicle-mounted pressurized air that the reducing agent in the supplier is emptied; Also there is small part not have gas and helps the formula product, adopt the method that empties of oppositely finding time.No matter have gas to help the formula product or no gas helps the formula product, the design that reducing agent empties all is one of core technology of supplier, because the method that reducing agent empties and effect directly have influence on usability and the reliability of supplier.Utilize vehicle-mounted pressurized air that the residual reducing agent in reducer feeding device inside is emptied, the defective that the method exists is to consume vehicle-mounted pressurized air, brings certain potential safety hazard for brake system, and is inapplicable for the vehicle of no vehicle-mounted source of compressed air; No gas helps the reducer feeding device of formula product generally complicated slightly, and reducing agent empties halfway problem in the supplier but also exist.
At present no gas help the formula product reducer feeding device empty the upper-end surface that the runner entrance is positioned at strainer cover, no gas practise midwifery product as Bosch, its design that empties runner is to adopt inclined hole to connect the above filter exocoel of strainer cover, under the pumping action of pump, empty the reducing agent in the reducer feeding device, but can not realize emptying fully of the interior reducing agent of the following strainer cover of inclined hole.
In addition, the prior art middle filtrator all is vertical setting, and filter is when vertically arranging, and is arranged on the bottom or is arranged on the runner that empties of filter circumferential location, reducing agent thoroughly can not be emptied, and in the process of dismounting and replacing filter, easily cause reducing agent to leak and spill and befouling environment.
Summary of the invention
The objective of the invention is to provides a kind of reducer feeding device at the defective of prior art, thereby avoid supplier inner volume and runner to stop up, during with realization SCR system restart, reducing agent after thawing can be rapidly, waltz through reducer feeding device and pipeline, is transported in the injection apparatus afterwards.
The present invention adopts following technological scheme for achieving the above object:
A kind of reducer feeding device, comprise supplier body, cylindrical filter, supply pump, back suction pump, bi-bit bi-pass switch valve, it is characterized in that: described cylindrical filter is horizontally installed in the supplier body, the tangential place of described cylindrical filter circumference lowermost end is provided with the floor drain formula and empties runner, described floor drain formula empties runner and links to each other with the back suction pump through the bi-bit bi-pass switch valve, and described supply pump communicates with the filter inner chamber by service.
Be further characterized in that: described supplier body is provided with pressure transducer, and pressure transducer communicates with the cylindrical filter exocoel.
Described service communicates with the cylindrical filter inner chamber after through an one-way valve.
Described supplier body bottom is provided with the reducing agent import, top is respectively arranged with reducing agent outlet and reducing agent refluxing opening.
Preferably: described supply pump, back suction pump are diaphragm pump.
The present invention is the cylindrical filter cross setting, and at the tangential place of cylindrical filter circumference lowermost end the floor drain formula is set and empties runner, reducing agent can be converged in empty in the runner, and can thoroughly be discharged, and do not change the flow through direction of filter of reducing agent simultaneously.This is simple in structure effectively, need not use pressurized air.Can also prevent in the dismounting of cylindrical filter and replacing process that in addition the leakage of reducing agent from spilling, avoid befouling environment.
Description of drawings
Fig. 1 is the normal cross section schematic representation of structure of the present invention.
Fig. 2 is the side generalized section of structure of the present invention.
Embodiment
A kind of reducer feeding device as shown in Figure 1, comprise supplier body 15, cylindrical filter 5, supply pump 13, back suction pump 4, bi-bit bi-pass switch valve 3, described cylindrical filter 5 is horizontally installed in the supplier body 15, the tangential place of described cylindrical filter 5 circumference lowermost ends is provided with the floor drain formula and empties runner 2, described floor drain formula empties runner 2 and links to each other with back suction pump 4 through bi-bit bi-pass switch valve 3, and described supply pump 13 communicates with filter inner chamber 10 by service and one-way valve 12 backs.Described supplier body 15 is provided with pressure transducer 8, and communicates with cylindrical filter exocoel 11.Described supplier body 15 bottoms are provided with reducing agent import 14, top is respectively arranged with reducing agent outlet 7 and reducing agent refluxing opening 9.
Back suction pump 4 described in the present invention, supply pump 13, preferred a kind of diaphragm pump.
Reducing agent preferably adopts urea liquid (32.5% aqueous solution of urea), is stored in advance in the reducing agent storage tank.
At first according to the principle schematic of Fig. 1, reducing agent empties the basic principle of method in the description supplier.The core of this reducer feeding device is that the floor drain formula empties runner 2.When reducing agent was supplied with, supply pump 13 was in running order, and the bi-bit bi-pass switch valve 3 described in the present invention is in normally off, so the floor drain formula empties, and 2 no reducing agents flow in the runner.
When the SCR system works, reducing agent flowing in supplier is as follows: reducing agent import 14 → supply pump 13 → one-way valve 12 → filter inner chamber 10 → filter 5 → filter exocoel 11 → connecting passage 6 → pressure transducer 8 → reducing agent outlet 7(is delivered to nozzle) and reducing agent refluxing opening 9.
Before the SCR system was about to quit work, the reducing agent system of emptying started working, and bi-bit bi-pass switch valve 3 is opened, and under the pumping action of back suction pump 4, the reducing agent in the supplier begins to empty.When emptying system works reducing agent specifically flow to as follows: filter inner chamber 10 → filter 5 → filter exocoel 11 → floor drain formula empties runner entrance 1 → floor drain formula and empties runner 2 → bi-bit bi-pass switch valve 3 → back suction pump 4 → reducing agent import 14 → reducing agent storage tank.When pressure transducer 8 detects filter interior pressure and is lower than certain particular value (20kPa), to finish the emptying of reducing agent, this moment, bi-bit bi-pass switch valve 3 and back suction pump 4 were closed in outage, and the system of emptying quits work.
As shown in Figure 2, the entrance that the floor drain formula empties runner 2 is positioned at cylindrical filter circumference lowermost end tangentially to be located, and can converge reducing agent well.16 is strainer cover among Fig. 2.
In a word, the present invention adopts the cylindrical filter of cross setting and the design that the floor drain formula empties runner, can realize thoroughly emptying reducing agent in the supplier, effectively prevent from remaining in reducing agent the freezing or crystallization and stop up supplier inner volume and runner at low temperatures in the supplier, improve usability and the reliability of system.
Claims (5)
1. reducer feeding device, comprise supplier body, cylindrical filter, supply pump, back suction pump, bi-bit bi-pass switch valve, it is characterized in that: described cylindrical filter is horizontally installed in the supplier body, the tangential place of described cylindrical filter circumference lowermost end is provided with the floor drain formula and empties runner, described floor drain formula empties runner and links to each other with the back suction pump through the bi-bit bi-pass switch valve, and described supply pump communicates with the cylindrical filter inner chamber by service.
2. reducer feeding device according to claim 1, it is characterized in that: described supplier body is provided with pressure transducer, and pressure transducer communicates with the cylindrical filter exocoel.
3. reducer feeding device according to claim 1 is characterized in that: described service communicates with the cylindrical filter inner chamber after through an one-way valve.
4. reducer feeding device according to claim 1 is characterized in that: described supplier body bottom is provided with the reducing agent import, top is respectively arranged with reducing agent outlet and reducing agent refluxing opening.
5. reducer feeding device according to claim 1, it is characterized in that: described supply pump, back suction pump are diaphragm pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310233879.XA CN103291423B (en) | 2013-06-13 | 2013-06-13 | Reducing-agent supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310233879.XA CN103291423B (en) | 2013-06-13 | 2013-06-13 | Reducing-agent supply device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103291423A true CN103291423A (en) | 2013-09-11 |
| CN103291423B CN103291423B (en) | 2015-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310233879.XA Active CN103291423B (en) | 2013-06-13 | 2013-06-13 | Reducing-agent supply device |
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| CN (1) | CN103291423B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19946902A1 (en) * | 1999-09-30 | 2001-04-05 | Bosch Gmbh Robert | Device for the aftertreatment of exhaust gases from an internal combustion engine |
| US20040098978A1 (en) * | 2002-11-21 | 2004-05-27 | Combustion Components Associates, Inc. | Mobile diesel selective catalytic reduction systems and methods |
| CN101103185A (en) * | 2005-01-17 | 2008-01-09 | 罗伯特·博世有限公司 | Exhaust gas subsequent processing method and method therefor |
| CN101988409A (en) * | 2009-08-03 | 2011-03-23 | 海德里克林有限公司 | SCR exhaust gas aftertreatment device |
| CN202402109U (en) * | 2012-01-17 | 2012-08-29 | 博世汽车柴油***股份有限公司 | Reducing agent supply module for vehicle and shell of reducing agent supply module |
| DE102011077953A1 (en) * | 2011-06-22 | 2012-12-27 | Robert Bosch Gmbh | Injector |
-
2013
- 2013-06-13 CN CN201310233879.XA patent/CN103291423B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19946902A1 (en) * | 1999-09-30 | 2001-04-05 | Bosch Gmbh Robert | Device for the aftertreatment of exhaust gases from an internal combustion engine |
| US20040098978A1 (en) * | 2002-11-21 | 2004-05-27 | Combustion Components Associates, Inc. | Mobile diesel selective catalytic reduction systems and methods |
| CN101103185A (en) * | 2005-01-17 | 2008-01-09 | 罗伯特·博世有限公司 | Exhaust gas subsequent processing method and method therefor |
| CN101988409A (en) * | 2009-08-03 | 2011-03-23 | 海德里克林有限公司 | SCR exhaust gas aftertreatment device |
| DE102011077953A1 (en) * | 2011-06-22 | 2012-12-27 | Robert Bosch Gmbh | Injector |
| CN202402109U (en) * | 2012-01-17 | 2012-08-29 | 博世汽车柴油***股份有限公司 | Reducing agent supply module for vehicle and shell of reducing agent supply module |
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| Publication number | Publication date |
|---|---|
| CN103291423B (en) | 2015-05-20 |
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Effective date of registration: 20170613 Address after: 214063 Jiangsu province Binhu District of Wuxi City Qian Rong Lu No. 15 Patentee after: China FAW Group Corporation Address before: 214063 Jiangsu province Binhu District of Wuxi City Qian Rong Lu No. 15 Patentee before: Wuxi Oil Pump Nozzle Institute of First Automobile Works |
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