CN111828139A - Urea pump integrated flow passage block - Google Patents
Urea pump integrated flow passage block Download PDFInfo
- Publication number
- CN111828139A CN111828139A CN202010866844.XA CN202010866844A CN111828139A CN 111828139 A CN111828139 A CN 111828139A CN 202010866844 A CN202010866844 A CN 202010866844A CN 111828139 A CN111828139 A CN 111828139A
- Authority
- CN
- China
- Prior art keywords
- flow channel
- block
- runner
- urea pump
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 239000004202 carbamide Substances 0.000 title claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 238000002347 injection Methods 0.000 claims abstract description 37
- 239000007924 injection Substances 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000003825 pressing Methods 0.000 claims abstract description 16
- 238000005086 pumping Methods 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 238000002425 crystallisation Methods 0.000 abstract description 4
- 230000008025 crystallization Effects 0.000 abstract description 4
- 239000012528 membrane Substances 0.000 description 3
- 238000005336 cracking Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1473—Overflow or return means for the substances, e.g. conduits or valves for the return path
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1486—Means to prevent the substance from freezing
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a urea pump integrated flow channel block which comprises a flow channel block, a supporting block, a pressing buckle and a process plug, wherein the supporting block is installed together with the flow channel block through the pressing buckle, the flow channel block comprises a flow channel block liquid inlet, an injection flow channel and a flow channel block liquid outlet, the injection flow channel is installed at the longitudinal center line position of the flow channel block, the flow channel block liquid inlet and the flow channel block liquid outlet are installed at the bottom of the flow channel block, process holes in the head and the tail of the injection flow channel are plugged by the process plug, and a pressure building flow channel and a back-pumping flow channel are respectively installed on two sides of the pipe wall of the. The urea pump can effectively save the structural arrangement space of the urea pump, increase the pumping-back function of the urea pump, reduce the crystallization blockage fault of the injection pipeline of the urea pump and reduce the cost.
Description
Technical Field
The invention relates to the technical field of automobile urea pump accessory production, in particular to a urea pump integrated flow passage block.
Background
At present, urea pumps used in the emission stage of national six and non-road T4 have two structures, namely a urea pump with a pumping-back function and a urea pump without the pumping-back function; the pressure building motor of the urea pump with the pumping-back function and the pumping-back motor are designed in a split structure, so that the structural arrangement space of a flow passage, the material cost and the arrangement space of the whole vehicle are increased; the urea pump without the back-pumping function has the common crystal blockage fault of an injection pipeline, so that certain improvement on the integration of liquid inlet and return channels of the urea pump is necessary.
Disclosure of Invention
The invention aims to provide a urea pump integrated flow passage block.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides an integrated runner block of urea pump, includes runner piece, supporting shoe, presses and detains and technology end cap, the supporting shoe is in the same place through pressing to detain and runner piece installation, the runner piece includes runner piece inlet, sprays runner, runner piece liquid outlet, it installs at the vertical central line position of runner piece to spray the runner, respectively installs runner piece inlet and runner piece liquid outlet near right and near left position in the bottom of runner piece, the process hole of the head and the afterbody of spraying the runner is stopped up by technology end cap, connects respectively to install in the pipe wall both sides of spraying the runner and builds pressure runner and back the runner of taking out.
Preferably, the pressure-building flow passage sequentially penetrates through the supporting block and the pressing buckle outwards, and the tail part of the pressure-building flow passage is connected with a pressure-building motor.
Preferably, the withdrawing flow channel sequentially penetrates through the supporting block and the pressing buckle outwards, and the tail part of the withdrawing flow channel is connected with a withdrawing motor.
Preferably, the liquid inlet end of the pressure building flow passage and the liquid outlet end of the withdrawal flow passage, namely the joint of the pressure building flow passage and the liquid inlet of the flow passage block and the joint of the withdrawal flow passage and the liquid outlet of the flow passage block, are provided with one-way valve membranes, so that the urea is ensured not to flow back.
Preferably, the process plug and the process hole of the injection flow channel are connected in a threaded fit manner, or other structures capable of realizing sealing between the process hole of the injection flow channel and the process plug are adopted.
Due to the adoption of the technical scheme, the invention has the beneficial effects that: the urea pump can effectively save the structural arrangement space of the urea pump, increase the pumping-back function of the urea pump, reduce the crystallization blockage fault of the injection pipeline of the urea pump and reduce the cost.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a top view of the present invention.
FIG. 3 is a view in the direction A-A of the top view of the present invention.
FIG. 4 is a view along the direction B-B of the top view of the first embodiment of the present invention.
FIG. 5 is a top view in the direction of C-C of the first embodiment of the present invention.
FIG. 6 is a D-D view of a top view of an embodiment of the present invention.
FIG. 7 is a view along the direction B-B as a top view of the second embodiment of the present invention.
FIG. 8 is a top view in the direction of C-C of the second embodiment of the present invention.
FIG. 9 is a D-D view of the top view of the second embodiment of the present invention.
In the figure: 1. the device comprises a flow channel block 11, a flow channel block liquid inlet, 12, an injection flow channel, 13, a flow channel block liquid outlet, 14, a pressure building flow channel, 15, a withdrawal flow channel, 2, a supporting block, 3, a pressing buckle, 4, a process plug, 5, a pressure building motor, 6 and a withdrawal motor.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
As shown in fig. 1-6, the invention relates to a urea pump integrated flow channel block, which comprises a flow channel block 1, a supporting block 2, a press buckle 3 and a process plug 4, wherein the supporting block 2 is installed with the flow channel block 1 through the press buckle 3, the flow channel block 1 comprises a flow channel block liquid inlet 11, an injection flow channel 12 and a flow channel block liquid outlet 13, the injection flow channel 12 is installed at the longitudinal center line position of the flow channel block 1, the flow channel block liquid inlet 11 and the flow channel block liquid outlet 13 are installed at the bottom of the flow channel block 1, the process holes at the head and the tail of the injection flow channel 12 are blocked by the process plug 4, and a pressure building flow channel 14 and a back pumping flow channel 15 are respectively connected and installed at two sides of.
The pressure building flow passage 14 sequentially penetrates through the supporting block 2 and the pressing buckle 3 outwards, and the tail part of the pressure building flow passage is connected with a pressure building motor 5.
The pumping-back flow passage 15 sequentially penetrates through the supporting block 2 and the pressing buckle 3 outwards, and the tail part of the pumping-back flow passage is connected with a pumping-back motor 6.
Check valve membranes are arranged at the liquid inlet end of the pressure building flow channel 14 and the liquid outlet end of the pumping flow channel 15, namely, the joint of the pressure building flow channel 14 and the flow channel block liquid inlet 11 and the joint of the pumping flow channel 15 and the flow channel block liquid outlet 13, so that the urea is prevented from flowing back.
The technical plug 4 is connected with the technical hole of the injection flow channel 12 in a threaded fit manner, or other structures capable of realizing sealing between the technical hole of the injection flow channel 12 and the technical plug 4 are adopted.
In this embodiment, the positions of the flow path block liquid inlet 11 and the flow path block liquid outlet 13 are respectively located at the right and left positions of the bottom of the flow path block 1.
The working principle is as follows: when the urea pump works for pressure buildup, urea enters a pressure buildup flow channel 14 from a flow channel block liquid inlet 11, runs through a pressure buildup motor 5, sequentially passes through a supporting block 2 and a pressing buckle 3, then flows into an injection flow channel 12, and enters an injection state after the pressure reaches the injection pressure set by the pump body; after the whole vehicle is shut down, the pumping-back motor 6 works, urea enters the injection runner 12 through the runner block liquid outlet 13, sequentially passes through the supporting block 2 and the pressing buckle 3, then runs to the pumping-back runner 15 from the pumping-back motor 6, and flows out of the urea pump from the runner block liquid inlet 11 after the pumping-back runner 15 is transported, so that the urea residues in the injection pressure runner 14, the pumping-back runner 15 and the injection runner 12 are emptied, the failure of the urea pump due to low-temperature freezing and expansion cracking of the pump body and the long-time pipeline parking crystallization are reduced, and the cost increase caused by the failure of the urea pump is effectively reduced.
Example two
As shown in fig. 1, 2, 3, 7, 8 and 9, the invention relates to a urea pump integrated flow channel block, which comprises a flow channel block 1, a supporting block 2, a press buckle 3 and a process plug 4, wherein the supporting block 2 is installed with the flow channel block 1 through the press buckle 3, the flow channel block 1 comprises a flow channel block liquid inlet 11, an injection flow channel 12 and a flow channel block liquid outlet 13, the injection flow channel 12 is installed at the longitudinal center line position of the flow channel block 1, the flow channel block liquid inlet 11 and the flow channel block liquid outlet 13 are installed at the bottom of the flow channel block 1, the process holes at the head and the tail of the injection flow channel 12 are plugged by the process plug 4, and a pressure building flow channel 14 and a back-pumping flow channel 15 are respectively installed at two sides of the.
The pressure building flow passage 14 sequentially penetrates through the supporting block 2 and the pressing buckle 3 outwards, and the tail part of the pressure building flow passage is connected with a pressure building motor 5.
The pumping-back flow passage 15 sequentially penetrates through the supporting block 2 and the pressing buckle 3 outwards, and the tail part of the pumping-back flow passage is connected with a pumping-back motor 6.
And check valve membranes are arranged at the liquid inlet end of the pressure building flow channel 14 and the liquid outlet end of the pumping flow channel 15, namely the joint of the pressure building flow channel 14 and the flow channel block liquid outlet 13 and the joint of the pumping flow channel 15 and the flow channel block liquid inlet 11, so that the urea is prevented from flowing back.
The technical plug 4 is connected with the technical hole of the injection flow channel 12 in a threaded fit manner, or other structures capable of realizing sealing between the technical hole of the injection flow channel 12 and the technical plug 4 are adopted.
In this embodiment, the positions of the flow path block liquid inlet 11 and the flow path block liquid outlet 13 are respectively located at the left and right positions of the bottom of the flow path block 1.
The working principle is as follows: when the urea pump works for pressure buildup, urea enters a pressure buildup flow channel 14 from a flow channel block liquid outlet 13, runs through a pressure buildup motor 5, sequentially passes through a supporting block 2 and a pressing buckle 3, then flows into an injection flow channel 12, and enters an injection state after the pressure reaches the injection pressure set by the pump body; after the whole vehicle is shut down, the pumping-back motor 6 works, urea enters the injection runner 12 through the runner block liquid inlet 11, sequentially passes through the supporting block 2 and the pressing buckle 3, then runs to the pumping-back runner 15 from the pumping-back motor 6, and flows out of the urea pump from the runner block liquid outlet 13 after the pumping-back runner 15 is transported, so that the urea residues in the injection pressure runner 14, the pumping-back runner 15 and the injection runner 12 are emptied, the problems that the urea pump fails due to low-temperature freezing and expansion cracking and long-time pipeline parking crystallization are caused are reduced, and the cost increase caused by the failure of the urea pump is effectively reduced.
The foregoing is a detailed description of the invention in connection with specific preferred embodiments thereof, and it is not intended that the specific embodiments of the invention be limited to these descriptions. For those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which should be construed as falling within the scope of the claims as filed.
Claims (5)
1. A urea pump integrated flow channel block is characterized in that: including runner piece (1), supporting shoe (2), pressure knot (3) and technology end cap (4), supporting shoe (2) are detained (3) through the pressure and are installed together with runner piece (1), runner piece (1) is including runner piece inlet (11), injection runner (12), runner piece liquid outlet (13), install at the vertical central line position of runner piece (1) injection runner (12), install runner piece inlet (11) and runner piece liquid outlet (13) in the bottom of runner piece (1), the process hole of the head of injection runner (12) and afterbody is stopped up by technology end cap (4), connects respectively in the pipe wall both sides of injection runner (12) and installs pressure building runner (14) and pumpback runner (15).
2. The urea pump integrated flowpath block of claim 1, wherein: the pressure building flow channel (14) sequentially penetrates through the supporting block (2) and the pressing buckle (3) outwards, and the tail part of the pressure building flow channel is connected with a pressure building motor (5).
3. The urea pump integrated flowpath block of claim 1, wherein: the drawing-back flow passage (15) sequentially penetrates through the supporting block (2) and the pressing buckle (3) outwards, and the tail part of the drawing-back flow passage is connected with a drawing-back motor (6).
4. The urea pump integrated flowpath block of claim 1, wherein: and check valve diaphragms are arranged at the liquid inlet end of the pressure building flow channel (14) and the liquid outlet end of the pumping flow channel (15), namely the joint of the pressure building flow channel (14) and the flow channel block liquid inlet (11) and the joint of the pumping flow channel (15) and the flow channel block liquid outlet (13), so that the urea is prevented from flowing back.
5. The urea pump integrated flowpath block of claim 1, wherein: the process plug (4) is in threaded fit connection with the process hole of the injection flow channel (12), or other structures capable of achieving sealing between the process hole of the injection flow channel (12) and the process plug (4) are adopted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010866844.XA CN111828139A (en) | 2020-08-26 | 2020-08-26 | Urea pump integrated flow passage block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010866844.XA CN111828139A (en) | 2020-08-26 | 2020-08-26 | Urea pump integrated flow passage block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111828139A true CN111828139A (en) | 2020-10-27 |
Family
ID=72918396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010866844.XA Pending CN111828139A (en) | 2020-08-26 | 2020-08-26 | Urea pump integrated flow passage block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111828139A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855312A (en) * | 2021-03-04 | 2021-05-28 | 山东艾泰克环保科技股份有限公司 | Urea pump injection metering pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011081628A1 (en) * | 2011-08-26 | 2013-02-28 | Robert Bosch Gmbh | Dosing system for a liquid reducing agent |
| CN104053873A (en) * | 2011-12-12 | 2014-09-17 | 罗伯特·博世有限公司 | Metering arrangement for liquid exhaust-gas aftertreatment medium and metering method |
| CN210289881U (en) * | 2019-02-25 | 2020-04-10 | 杜玮 | Urea conveying and back-pumping metering device and SCR system thereof |
| CN210440102U (en) * | 2019-02-25 | 2020-05-01 | 杜玮 | Urea conveying pumpback pump core, device and SCR system |
| CN212296566U (en) * | 2020-08-26 | 2021-01-05 | 山东艾泰克环保科技股份有限公司 | Urea pump integrated flow passage block |
-
2020
- 2020-08-26 CN CN202010866844.XA patent/CN111828139A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011081628A1 (en) * | 2011-08-26 | 2013-02-28 | Robert Bosch Gmbh | Dosing system for a liquid reducing agent |
| CN104053873A (en) * | 2011-12-12 | 2014-09-17 | 罗伯特·博世有限公司 | Metering arrangement for liquid exhaust-gas aftertreatment medium and metering method |
| CN210289881U (en) * | 2019-02-25 | 2020-04-10 | 杜玮 | Urea conveying and back-pumping metering device and SCR system thereof |
| CN210440102U (en) * | 2019-02-25 | 2020-05-01 | 杜玮 | Urea conveying pumpback pump core, device and SCR system |
| CN212296566U (en) * | 2020-08-26 | 2021-01-05 | 山东艾泰克环保科技股份有限公司 | Urea pump integrated flow passage block |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855312A (en) * | 2021-03-04 | 2021-05-28 | 山东艾泰克环保科技股份有限公司 | Urea pump injection metering pump |
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