CN221053784U - Urea injection device adopting rear filter element structure and reversing valve - Google Patents
Urea injection device adopting rear filter element structure and reversing valve Download PDFInfo
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- CN221053784U CN221053784U CN202322808432.2U CN202322808432U CN221053784U CN 221053784 U CN221053784 U CN 221053784U CN 202322808432 U CN202322808432 U CN 202322808432U CN 221053784 U CN221053784 U CN 221053784U
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- urea
- reversing valve
- pipeline
- injection
- inlet
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 103
- 239000004202 carbamide Substances 0.000 title claims abstract description 103
- 238000002347 injection Methods 0.000 title claims abstract description 75
- 239000007924 injection Substances 0.000 title claims abstract description 75
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 239000000243 solution Substances 0.000 abstract description 28
- 238000001914 filtration Methods 0.000 abstract description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 12
- 239000013078 crystal Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Exhaust Gas After Treatment (AREA)
Abstract
The utility model discloses a urea injection device adopting a rear filter element structure and a reversing valve, which comprises: a urea tank; the diaphragm pump is connected with the urea box through a liquid inlet pipeline; the urea nozzle is connected with the diaphragm pump through an injection pipeline; the first liquid inlet end of the inlet reversing valve is connected with the urea box, the second liquid inlet end of the inlet reversing valve is connected with the injection pipeline through a first branch pipe, and the liquid outlet end of the inlet reversing valve is connected with the diaphragm pump; the liquid inlet end of the outlet reversing valve is connected with the rear filter element, the first liquid outlet end of the outlet reversing valve is connected with the urea nozzle through an injection pipeline, and the second liquid outlet end of the outlet reversing valve is connected with the overflow pipeline through a second branch pipe. The utility model adopts the rear filter element as the filtering device of the feed pump, can more effectively regulate pressure fluctuation, improves the injection precision of urea solution, reduces urea consumption deviation, realizes the inlet and outlet reversing of the urea injection device through the reversing valve, and improves the efficiency of emptying the urea injection device and the liquid in the injection pipe.
Description
Technical Field
The utility model relates to the field of urea injection devices. More particularly, the utility model relates to a urea injection device employing a post-filter element structure and a reversing valve.
Background
In many cases, when an internal combustion engine of an automobile, such as a diesel engine, is operated, nitrogen oxides (NOx) are generated with an excessive amount of oxygen, and thus the environment is polluted. In order to meet the increasingly severe emission requirements and reduce the emission of nitrogen oxides, the NOx in the tail gas needs to be reduced into nitrogen and water, and usually, before the tail gas enters a catalyst, urea aqueous solution is injected into the tail gas as a reducing agent to reduce the NOx. However, the urea injection device currently on the market has one problem: the urea solution remained in the pipeline is crystallized, damage is caused to the pipeline, and when the temperature is too low, the urea solution remained in the pipeline is frozen to block the pipeline, so that the system is problematic.
Disclosure of utility model
The utility model aims to provide a urea injection device adopting a rear filter element structure and a reversing valve, wherein the rear filter element is used as a filtering device of a supply pump, so that pressure fluctuation can be regulated more effectively, the injection precision of urea solution is improved, urea consumption deviation is reduced, the inlet and outlet reversing of the urea injection device is realized through the reversing valve, and the efficiency of emptying the urea injection device and the liquid in an injection pipe is improved.
The technical scheme adopted by the utility model for solving the technical problem is as follows: a urea injection apparatus employing a post-cartridge structure and a reversing valve, comprising:
a urea tank;
The diaphragm pump is connected with the urea box through a liquid inlet pipeline; the urea nozzle is connected with the diaphragm pump through an injection pipeline;
wherein,
An inlet reversing valve is arranged on the liquid inlet pipeline, a first liquid inlet end of the inlet reversing valve is connected with the urea box, a second liquid inlet end of the inlet reversing valve is connected with the injection pipeline through a first branch pipe, and a liquid outlet end of the inlet reversing valve is connected with the diaphragm pump;
an outlet reversing valve and a pressure sensor are arranged on the injection pipeline from the diaphragm pump to the urea nozzle;
The liquid inlet end of the outlet reversing valve is connected with the rear filter element, the first liquid outlet end of the outlet reversing valve is connected with the urea nozzle through an injection pipeline, and the second liquid outlet end of the outlet reversing valve is connected with the overflow pipeline through a second branch pipe.
Preferably, the urea injection device adopting the post-filter element structure and the reversing valve further comprises a control end which is connected with the diaphragm pump, the inlet reversing valve, the outlet reversing valve and the pressure sensor.
Preferably, in the urea injection device adopting the post-filter element structure and the reversing valve, the control end is a DCU control end.
Preferably, in the urea injection device adopting the post-filter element structure and the reversing valve, one end of the overflow pipeline is connected with an injection pipeline corresponding to the liquid outlet end of the post-filter element, and the other end of the overflow pipeline is connected with the urea box.
Preferably, in the urea injection device adopting the post-filter element structure and the reversing valve, the overflow pipe is provided with an overflow hole.
Preferably, in the urea injection device adopting the post-filter element structure and the reversing valve, a liquid inlet end of the post-filter element is connected with the diaphragm pump, a liquid outlet end of the post-filter element is connected with the urea nozzle through an injection pipeline, and a pressure sensor is arranged on the injection pipeline.
Preferably, in the urea injection device adopting the post-filter element structure and the reversing valve, the urea nozzle is an electric control nozzle.
The utility model at least comprises the following beneficial effects:
1. The utility model adopts the rear filter element as the filtering device of the feed pump, can more effectively regulate pressure fluctuation, improves the injection precision of urea solution and reduces urea consumption deviation.
2. The inlet and outlet reversing of the urea injection device is realized through the reversing valve, and the efficiency of emptying the urea injection device and the liquid in the injection pipe is improved.
3. According to the utility model, the rotating speed of the diaphragm pump is regulated by controlling the current of the input end, so that the urea solution can be easily extracted, and the pressure is stable by regulating the DCU control end according to the signal fed back by the pressure sensor. The inlet reversing valve and the outlet reversing valve are controlled by the current of the input end, after the inlet reversing valve and the outlet reversing valve are electrified, the diaphragm pump operates to ensure that the system has a back suction emptying function, residual solution in a pipeline after back suction injection is stopped can be pumped out and discharged back to a urea tank, so that the problems that urea crystals are formed in the pipeline by the residual solution in an injection system, the diaphragm pump is worn due to the crystals, a nozzle is blocked and the like are avoided. In extremely cold conditions, when the temperature is lower than-11 ℃, the residual solution freezes in the pipeline, when the system is started at low temperature, the urea conveying pipeline is blocked by the ice, and meanwhile, the frozen urea solution expands in volume, so that the pipeline is broken in a swelling manner, and the system is in fault; but have the import switching-over valve and the export switching-over valve of back-suction emptying function, after the engine is put out, system control import switching-over valve and export switching-over valve operation, can evacuate the residual solution in the pipeline rapidly, eliminate urea solution crystallization and the risk of icing, improved injection system's anti risk ability.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a urea injection device employing a post-filter structure and a reversing valve according to the present utility model.
FIG. 2 is a schematic diagram of the structure of the urea injection device with the rear filter element structure and the reversing valve when the inlet and outlet reversing valves of the urea injection device are electrified to work.
Reference numerals illustrate: 1. the urea box, 2, the urea nozzle, 3, overflow pipeline, 4, export switching-over valve, 5, overflow hole, 6, post filter core, 7, diaphragm pump, 8, feed liquor pipeline, 9, injection pipeline, 10, import switching-over valve, 11, pressure sensor, 12, first branch pipe, 13, second branch pipe.
Detailed Description
The present utility model is described in further detail below with reference to the drawings to enable those skilled in the art to practice the utility model by referring to the description.
The following description is presented to enable one of ordinary skill in the art to make and use the utility model. The preferred embodiments in the following description are by way of example only and other obvious variations will occur to those skilled in the art. The basic principles of the utility model defined in the following description may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the utility model.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms should not be construed as limiting the present utility model.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
As shown in fig. 1-2, a preferred embodiment of the present utility model provides a urea injection apparatus employing a post-cartridge structure and a reversing valve, comprising:
A urea tank 1;
a diaphragm pump 7 connected to the urea tank 1 through a liquid inlet pipe 8; a urea nozzle 2 connected to the diaphragm pump 7 through an injection pipe 9;
wherein,
An inlet reversing valve 10 is arranged on the liquid inlet pipeline 8, a first liquid inlet end of the inlet reversing valve 10 is connected with the urea box 1, a second liquid inlet end of the inlet reversing valve 10 is connected with the injection pipeline 9 through a first branch pipe 12, and a liquid outlet end of the inlet reversing valve 10 is connected with the diaphragm pump 7;
An outlet reversing valve 4 and a pressure sensor 11 are arranged on the injection pipeline 9 from the diaphragm pump 7 to the urea nozzle 2;
The liquid inlet end of the outlet reversing valve 4 is connected with the rear filter element 6, the first liquid outlet end of the outlet reversing valve 4 is connected with the urea nozzle 2 through an injection pipeline 9, and the second liquid outlet end of the outlet reversing valve 4 is connected with the overflow pipeline 3 through a second branch pipe 13;
and a control end connected with the diaphragm pump 7, the inlet reversing valve 10, the outlet reversing valve 4 and the pressure sensor 11.
Among the above-mentioned technical scheme, rear-mounted filter core 6, its feed liquor end connect in diaphragm pump 7, rear-mounted filter core 6 go out the liquid end through spray pipeline 9 connect in urea nozzle 2, be provided with pressure sensor 11 on the spray pipeline 9, can more effectually adjust pressure fluctuation with the filter core rear-mounted, can effectually improve the injection accuracy of urea solution like this, reduce urea consumption deviation.
In addition, in the above technical scheme, the diaphragm pump 7 adjusts the rotation speed by controlling the current of the input end, so that the urea solution can be easily extracted, and the pressure is stable by adjusting the control end of the DCU according to the signal fed back by the pressure sensor 11. The inlet reversing valve 10 and the outlet reversing valve 4 are controlled by the current of the input end, after the inlet reversing valve 10 and the outlet reversing valve 4 are electrified, the diaphragm pump 7 operates to ensure that the system has a back suction emptying function, residual solution in a pipeline after the back suction injection is stopped can be pumped out and discharged back to the urea tank 1, so that the problems that urea crystals are formed in the pipeline by the residual solution in the injection system, the diaphragm pump is worn and the nozzle is blocked due to the crystals are avoided. In extremely cold conditions, when the temperature is lower than-11 ℃, the residual solution freezes in the pipeline, when the system is started at low temperature, the urea conveying pipeline is blocked by the ice, and meanwhile, the frozen urea solution expands in volume, so that the pipeline is broken in a swelling manner, and the system is in fault; but the reversing valve with the back suction emptying function can quickly evacuate residual solution in the pipeline after the engine is shut down by controlling the operation of the inlet reversing valve 10 and the outlet reversing valve 4 by the system, so that the risks of urea solution crystallization and icing are eliminated, and the anti-risk capability of the injection system is improved.
In another technical scheme, one end of the overflow pipeline 3 is connected with an injection pipeline 9 corresponding to the liquid outlet end of the rear filter element 6, and the other end of the overflow pipeline 3 is connected with the urea box 1. And the overflow pipe 3 is provided with an overflow hole 5. When the inlet reversing valve 10 and the outlet reversing valve 4 are not electrified, the pipeline at the point A and the point D are closed (the joint of the second liquid inlet end of the inlet reversing valve 10 and the first branch pipe 12 is closed, the joint of the second liquid outlet end of the outlet reversing valve 4 and the second branch pipe 13 is closed), and the pipeline at the point B and the point C are opened (the joint of the liquid inlet pipeline 8 and the first liquid inlet end of the inlet reversing valve 10 is opened, and the joint of the first liquid outlet end of the outlet reversing valve 4 and the injection pipeline 9 is opened); when the inlet reversing valve 10 and the outlet reversing valve 4 are electrified and work, a pipeline at the point A and the point D are opened (the joint of the second liquid inlet end of the inlet reversing valve 10 and the first branch pipe 12 is opened, the joint of the second liquid outlet end of the outlet reversing valve 4 and the second branch pipe 13 is opened), and a pipeline at the point B and the point C is closed (the joint of the liquid inlet pipeline 8 and the first liquid inlet end of the inlet reversing valve 10 is closed, and the joint of the first liquid outlet end of the outlet reversing valve 4 and the injection pipeline 9 is closed). The inlet and outlet reversing of the urea injection device is realized through the reversing valve, and the efficiency of emptying the urea injection device and the liquid in the injection pipe is improved.
The engine ECU sends signals to a DCU controller in the urea supply pump, the DCU controller controls a diaphragm pump 7 to start, suction is provided for urea solution in the urea tank 1, at the moment, an inlet reversing valve 10 and an outlet reversing valve 4 are not electrified, pipelines at A point and D point are closed, pipelines at B point and C point are opened, the urea solution is conveyed to a rear filter element 6 through the diaphragm pump, one end of the urea solution returns to the urea tank 1 through an overflow hole 5 and an overflow pipeline 3, the other end of the urea solution flows into an electric control urea nozzle 2 through an injection pipeline 9, at the moment, the pressure in the pipeline is stable, and when the nozzle receives a quantitative urea flow electric signal, the nozzle opens a corresponding opening to inject specified urea solution flow; as shown in figure 2, after the engine is shut down, the diaphragm pump 7 stops working, the DCU controller controls the inlet reversing valve 10 and the outlet reversing valve 4 to be electrified and work, meanwhile, the diaphragm pump 7 restarts to rapidly start to operate, at the moment, the pipeline at the point A and the point D is opened, the pipeline at the point B and the point C is closed, meanwhile, the electric control nozzle is opened for a certain opening degree, the diaphragm pump 7 evacuates urea solution remained in the injection pipeline and the urea injection device, and the urea solution flows into the urea tank 1 through the overflow pipeline 3.
Although embodiments of the present utility model have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the utility model would be readily apparent to those skilled in the art, and accordingly, the utility model is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (7)
1. A urea injection device employing a post-filter element structure and a reversing valve, comprising:
a urea tank;
The diaphragm pump is connected with the urea box through a liquid inlet pipeline; the urea nozzle is connected with the diaphragm pump through an injection pipeline;
wherein,
An inlet reversing valve is arranged on the liquid inlet pipeline, a first liquid inlet end of the inlet reversing valve is connected with the urea box, a second liquid inlet end of the inlet reversing valve is connected with the injection pipeline through a first branch pipe, and a liquid outlet end of the inlet reversing valve is connected with the diaphragm pump;
an outlet reversing valve and a pressure sensor are arranged on the injection pipeline from the diaphragm pump to the urea nozzle;
The liquid inlet end of the outlet reversing valve is connected with the rear filter element, the first liquid outlet end of the outlet reversing valve is connected with the urea nozzle through an injection pipeline, and the second liquid outlet end of the outlet reversing valve is connected with the overflow pipeline through a second branch pipe.
2. The urea injection apparatus of claim 1, further comprising a control port coupled to the diaphragm pump, the inlet diverter valve, the outlet diverter valve, and the pressure sensor.
3. The urea injection apparatus of claim 2, wherein the control end is a DCU control end.
4. The urea injection device adopting the post-filter element structure and the reversing valve according to claim 1, wherein one end of the overflow pipeline is connected to an injection pipeline corresponding to the liquid outlet end of the post-filter element, and the other end of the overflow pipeline is connected to the urea tank.
5. The urea injection apparatus of claim 4, wherein the overflow conduit is provided with an overflow aperture.
6. The urea injection device adopting a post-filter element structure and a reversing valve according to claim 1, wherein a liquid inlet end of the post-filter element is connected to the diaphragm pump, a liquid outlet end of the post-filter element is connected to the urea nozzle through an injection pipeline, and a pressure sensor is arranged on the injection pipeline.
7. The urea injection apparatus of claim 1, wherein the urea nozzle is an electronically controlled nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322808432.2U CN221053784U (en) | 2023-10-19 | 2023-10-19 | Urea injection device adopting rear filter element structure and reversing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322808432.2U CN221053784U (en) | 2023-10-19 | 2023-10-19 | Urea injection device adopting rear filter element structure and reversing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221053784U true CN221053784U (en) | 2024-05-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322808432.2U Active CN221053784U (en) | 2023-10-19 | 2023-10-19 | Urea injection device adopting rear filter element structure and reversing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221053784U (en) |
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2023
- 2023-10-19 CN CN202322808432.2U patent/CN221053784U/en active Active
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