CN206360756U - Urea tube and its urea injection system with one-way throttle function - Google Patents
Urea tube and its urea injection system with one-way throttle function Download PDFInfo
- Publication number
- CN206360756U CN206360756U CN201621193188.7U CN201621193188U CN206360756U CN 206360756 U CN206360756 U CN 206360756U CN 201621193188 U CN201621193188 U CN 201621193188U CN 206360756 U CN206360756 U CN 206360756U
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- Prior art keywords
- urea
- tube
- heat
- resistant
- wrapped
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Abstract
A kind of urea tube and its urea injection system with one-way throttle function, wherein urea tube includes fast plug, the urea outlet connection being connected with the fast plug and the bypass tube assembly being connected with the urea outlet connection, the bypass tube assembly includes resistant to urea nylon tube, it is wrapped on the resistant to urea nylon tube and to heat the resistance wire of the resistant to urea nylon tube, heat-conducting layer positioned at the periphery of the resistance wire and to limit the resistance wire, it is wrapped in the heat-insulation layer of the heat-conducting layer periphery and is wrapped in the corrugate sheath of the heat-insulation layer periphery, one-way throttle valve is installed in the bypass tube assembly.It is arranged such, urea can be back to urea box when system pressure is higher, play the protective effect to urea pump.In addition, playing a part of when urea pump pumpback reversely by so that the urea in urea pressure pipe can flow back into the urea box.
Description
Technical field
The utility model is related to a kind of urea tube with one-way throttle function and its urea injection system, belongs to engine
Exhaust aftertreatment technical field.
Background technology
Existing urea injection system generally include be used to from urea box the urea pump assembly of extracted urea solution and
Urea nozzle to spray urea in from the tail gas to engine.Based on current urea pump assembly at work, pump continuous service
Urea is supplied, and the water-cooled nozzle used is not provided with the structure of urea cooling for reflux.When nozzle is not turned on, pumped out from urea pump
Urea can not flow back, cause urea pump overflow phenomena, urea pump will be damaged.
Utility model content
The purpose of this utility model is to provide a kind of urea tube and its urea injection system with one-way throttle function.
To achieve the above object, the utility model is adopted the following technical scheme that：A kind of urea with one-way throttle function
Pipe, it include fast plug, the urea outlet connection being connected with the fast plug and with the urea outlet connection phase
The bypass tube assembly of connection, the bypass tube assembly includes resistant to urea nylon tube, is wrapped on the resistant to urea nylon tube and uses
To heat the resistance wire of the resistant to urea nylon tube, the heat conduction positioned at the periphery of the resistance wire and to limit the resistance wire
Layer, the heat-insulation layer for being wrapped in the heat-conducting layer periphery and the corrugate sheath for being wrapped in the heat-insulation layer periphery, the bypass pipe
One-way throttle valve is installed in component.
As the further improved technical scheme of the utility model, the fast plug is provided with and the urea outlet connection
The inlet duct portion of alignment and the outlet duct portion being connected between the inlet duct portion and the urea outlet connection, wherein described
Outlet duct portion is inserted in the resistant to urea nylon tube.
As the further improved technical scheme of the utility model, the one-way throttle valve is also inserted into the resistant to urea Buddhist nun
Long Guanzhong and the downstream for being located at the outlet duct portion.
As the further improved technical scheme of the utility model, the heat-conducting layer includes masking foil.
As the further improved technical scheme of the utility model, the urea tube is also wrapped in the inlet tube
Portion, the outlet duct portion and the peripheral moulding for being at least partially disposed at the bypass tube assembly.
The utility model further discloses a kind of urea injection system, and it includes being used to the extracted urea solution from urea box
Urea pump assembly and the urea nozzle to spray urea in the tail gas to engine, before the urea injection system also includes
The urea tube stated, wherein the fast plug is connected with the urea pump assembly, the bypass tube assembly and the urea box
It is connected, the urea outlet connection is connected with the urea nozzle.
As the further improved technical scheme of the utility model, the urea pump assembly includes can be positive and reverse
The gear pump of operating.
Compared to prior art, the utility model be able to will be urinated by setting one-way throttle valve when system pressure is higher
Element is back to urea box, plays the protective effect to urea pump；In addition, play a part of when urea pump pumpback reversely by,
So that the urea in urea pressure pipe can flow back into the urea box.
Brief description of the drawings
Fig. 1 is the schematic perspective view for the urea tube that the utility model has one-way throttle function.
Fig. 2 is to remove the top view after the resistance wire in Fig. 1.
Fig. 3 is the diagrammatic cross-section of the line A-A along along Fig. 2.
Fig. 4 is the partial enlarged drawing of circled portion in Fig. 3.
Fig. 5 is the schematic diagram of the utility model urea injection system.
Embodiment
It please join shown in Fig. 1 to Fig. 4, the utility model discloses a kind of urea tube 100 with one-way throttle function.Fig. 5
Disclose the urea injection system 200 with the urea tube 100, wherein the urea injection system 200, it include being used to from
The urea pump assembly 400 of extracted urea solution and the urea to spray urea in the tail gas to engine in urea box 300
Nozzle 500.
It please join shown in Fig. 1 to Fig. 4, the urine that the urea tube 100 includes fast plug 1, is connected with the fast plug 1
Plain outlet connection 2 and the bypass tube assembly 3 being connected with the urea outlet connection 2.The bypass tube assembly 3 includes resistance to urine
Plain nylon tube 31, be wrapped on the resistant to urea nylon tube 31 and to heat the resistant to urea nylon tube 31 resistance wire 32,
Positioned at the periphery of the resistance wire 32 and to limit the heat-conducting layer 33 of the resistance wire 32, be wrapped in the periphery of heat-conducting layer 33
Heat-insulation layer 34 and be wrapped in the corrugate sheath 35 of the periphery of the heat-insulation layer 34.It is provided with the bypass tube assembly 3 unidirectional
Choke valve 36.
Please join shown in Fig. 3 and Fig. 4, in the utility model embodiment illustrated, the fast plug 1 be provided with it is described
Inlet duct portion 11 and be connected between the inlet duct portion 11 and the urea outlet connection 2 that urea outlet connection 2 aligns
Outlet duct portion 12.The outlet duct portion 12 is inserted in the resistant to urea nylon tube 31.The one-way throttle valve 36 is also inserted into
In the resistant to urea nylon tube 31 and positioned at the downstream of the outlet duct portion 12, the wherein signified direction of arrow is that urea is normally returned
The direction of stream.
The heat-conducting layer includes masking foil, to prevent heat from outwards dissipating, and improves the efficiency that heating is thawed.
The urea tube 100 is also wrapped in the inlet duct portion 11, the outlet duct portion 12 and at least part position
In the peripheral moulding 4 of the bypass tube assembly 3.
It please join shown in Fig. 5, the fast plug 1 is connected with the urea pump assembly 400.It is described bypass tube assembly 3 with
The urea box 300 is connected.The urea outlet connection 2 is connected with the urea nozzle 500.Preferably, the urea
Pump assembly 400 includes the gear pump for being capable of positive and antiport.
The control method of the utility model urea injection system 200 comprises the following steps：
S1, when the urea pump assembly 400 is started working, opens the urea nozzle 500；Set when system pressure reaches
When putting value, the urea nozzle 500 is closed；When the urea pressure come out from the urea pump assembly 400 reaches the unidirectional section
When flowing the Opening pressure of valve 36, open the one-way throttle valve 36 at least part urea is back in the urea box 300；
S2, when 400 normal work of urea pump assembly, the urea come out from the gear pump is a part of from the urine
Plain nozzle 500 sprays, and unnecessary urea flows back to the urea box 300 from the bypass tube assembly 3；
S3, when the gear pump inverts pumpback, opens the urea in the urea nozzle 500, the bypass tube assembly 3
Reversely end through the one-way throttle valve 36, the urea in urea pressure pipe flows back into the urea box 300 through the gear pump.
Urea can be back to urea box by the utility model by setting one-way throttle valve 36 when system pressure is higher
300, play the protective effect to urea pump.In addition, playing a part of when gear pump inverts pumpback reversely by so that urine
Urea in plain pressure pipe can flow back into the urea box 300.
In addition, above example is merely to illustrate the utility model and not limits the technical side described by the utility model
Case, understanding of this description should be based on person of ordinary skill in the field, although this specification is with reference to above-mentioned
Embodiment has been carried out detailed description to the utility model, still, it will be understood by those within the art that, affiliated skill
The technical staff in art field still can modify or equivalent substitution to the utility model, and all do not depart from this practicality newly
The technical scheme of the spirit and scope of type and its improvement, all should cover in right of the present utility model.
Claims (7)
1. a kind of urea tube with one-way throttle function, it includes fast plug, the urea being connected with the fast plug
Outlet connection and the bypass tube assembly being connected with the urea outlet connection, it is characterised in that：The bypass tube assembly bag
Resistant to urea nylon tube is included, is wrapped on the resistant to urea nylon tube and to heat resistance wire, the position of the resistant to urea nylon tube
In the periphery of the resistance wire and to limit the heat-conducting layer of the resistance wire, be wrapped in the heat-insulation layer of heat-conducting layer periphery with
And be wrapped in the corrugate sheath of heat-insulation layer periphery, the bypass tube assembly one-way throttle valve is installed.
2. urea tube as claimed in claim 1, it is characterised in that：The fast plug is provided with and the urea outlet connection pair
Neat inlet duct portion and the outlet duct portion being connected between the inlet duct portion and the urea outlet connection, wherein it is described go out
Mouth pipe portion is inserted in the resistant to urea nylon tube.
3. urea tube as claimed in claim 2, it is characterised in that：The one-way throttle valve is also inserted into the resistant to urea nylon
In pipe and positioned at the downstream of the outlet duct portion.
4. urea tube as claimed in claim 1, it is characterised in that：The heat-conducting layer includes masking foil.
5. urea tube as claimed in claim 3, it is characterised in that：The urea tube be also wrapped in the inlet duct portion,
The outlet duct portion and the peripheral moulding for being at least partially disposed at the bypass tube assembly.
6. a kind of urea injection system, it include being used to from urea box the urea pump assembly of extracted urea solution and to
The urea nozzle of urea is sprayed in the tail gas of engine, it is characterised in that：The urea injection system also includes such as claim 1
Urea tube into 5 described in any one, wherein the fast plug is connected with the urea pump assembly, the bypass pipe
Component is connected with the urea box, and the urea outlet connection is connected with the urea nozzle.
7. urea injection system as claimed in claim 6, it is characterised in that：The urea pump assembly include can it is positive and
The gear pump of antiport.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621193188.7U CN206360756U (en) | 2016-10-26 | 2016-10-26 | Urea tube and its urea injection system with one-way throttle function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621193188.7U CN206360756U (en) | 2016-10-26 | 2016-10-26 | Urea tube and its urea injection system with one-way throttle function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206360756U true CN206360756U (en) | 2017-07-28 |
Family
ID=59368706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621193188.7U Active CN206360756U (en) | 2016-10-26 | 2016-10-26 | Urea tube and its urea injection system with one-way throttle function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206360756U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285864A (en) * | 2016-10-26 | 2017-01-04 | 天纳克（苏州）排放系统有限公司 | There is the urea tube of one-way throttle function, urea injection system and control method thereof |
-
2016
- 2016-10-26 CN CN201621193188.7U patent/CN206360756U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285864A (en) * | 2016-10-26 | 2017-01-04 | 天纳克（苏州）排放系统有限公司 | There is the urea tube of one-way throttle function, urea injection system and control method thereof |
| WO2018077005A1 (en) * | 2016-10-26 | 2018-05-03 | 天纳克（苏州）排放系统有限公司 | Urea tube having one-way throttling function, urea spraying system and control method therefor |
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| GR01 | Patent grant |