CN202789500U - Urea pump shell body for selective catalytic reduction (SCR) metering injection system - Google Patents
Urea pump shell body for selective catalytic reduction (SCR) metering injection system Download PDFInfo
- Publication number
- CN202789500U CN202789500U CN 201220332505 CN201220332505U CN202789500U CN 202789500 U CN202789500 U CN 202789500U CN 201220332505 CN201220332505 CN 201220332505 CN 201220332505 U CN201220332505 U CN 201220332505U CN 202789500 U CN202789500 U CN 202789500U
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- Prior art keywords
- connecting hole
- injection system
- pump housing
- urea
- metering injection
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- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model discloses a urea pump shell body for a selective catalytic reduction (SCR) metering injection system. The urea pump shell body comprises a cavity body inside a pump body, wherein an axial inlet connecting hole and a radial outlet connecting hole are respectively formed in the pump body, the axial inlet connecting hole and the radial outlet connecting hole are communicated with the cavity body, and a taper pipe thread structure is arranged inside the axial inlet connecting hole. A liquid backflow channel is arranged on the pump body, one end of the liquid backflow channel is communicated with a backflow opening connecting hole of the end face of the pump body and the cavity body, the other end of the liquid backflow channel is an auxiliary hole, and the auxiliary hole is provided with a top thread. A taper pipe thread structure is arranged inside the backflow opening connecting hole. The pump body is made of metal. The urea pump shell body can keep good strength and toughness in high temperature and low temperature, and therefore, the urea pump shell body not only can satisfy strict demands for high and low temperature of parts in an automotive environment, but also can satisfy special demands of bearing urea aqueous solution corrosion. By adoption of the liquid backflow channel structure, the difficult problem that after down, the SCR metering injection system needs to discharge liquid is resolved.
Description
Technical field
The utility model relates to a kind of pump housing parts, relates in particular to a kind of urea pump housing for the SCR metering injection system.
Background technique
The agent structure of Miniature diaphragm pump is roughly the same, and its material is nylon material, because nylon material poor-performing at low temperatures, easily damaged or cracking; When being in low temperature environment, residual liquid produces and freezes and volumetric expansion in the pump case, the phenomenon of pump case occurs pushing even destroying easily; In addition, pump case only can realize the sealing transmitting effect of liquid, its function singleness.At present, yet there are no the Miniature diaphragm pump take aqueous solution of urea as working medium, and, because Miniature diaphragm pump does not have the function of back suction liquid, can not satisfy the requirement of needs evacuation of liquid function in the SCR metering injection system.
The model utility content
For above-mentioned prior art; the utility model provides a kind of urea pump housing for the SCR metering injection system; solved a difficult problem that needs evacuation of liquid after the SCR metering injection system is shut down; can also satisfy simultaneously under the automobile-used environment strict demand to the high low temperature of component, and can satisfy and bear the specific (special) requirements that aqueous solution of urea corrodes.
In order to solve the problems of the technologies described above, a kind of technological scheme that is achieved for the urea pump housing of SCR metering injection system of the utility model is: comprise that cavity, the described pump housing in the pump housing is provided with respectively the axial inlet attachment hole that connects with described cavity and radially exports attachment hole, the described pump housing is provided with liquid reflux channel, one end of described liquid reflux channel and the refluxing opening attachment hole of pump body end surface and cavity connect, the other end of described liquid reflux channel is auxiliary hole, is provided with jackscrew in the described auxiliary hole; The material of the described pump housing is metal.
Further, a kind of urea pump housing for the SCR metering injection system of the utility model wherein, is provided with the taper pipe thread structure in the described axial inlet attachment hole.
Be provided with the taper pipe thread structure in the described refluxing opening attachment hole.
Compared with prior art, effect of the present utility model is:
Because the pump housing in the utility model adopts metal material, all can keep good intensity and toughness at high and low temperature state, satisfy under the automobile-used environment strict demand to the high low temperature of component, and can satisfy and bear the specific (special) requirements that aqueous solution of urea corrodes.
Housing of the present utility model is provided with liquid reflux channel, solves a difficult problem that needs evacuation of liquid after the SCR metering injection system is shut down by this liquid reflux channel.In addition, the employing liquid reflux channel is integrated in the design of pump case, so that pump body structure is very compact.
Description of drawings
Fig. 1 is the plan view of a kind of urea pump housing for the SCR metering injection system of the utility model;
Fig. 2 is the revolved sectional view of A-A slice location among Fig. 1;
Fig. 3 is the rear view of pump case shown in Figure 1;
Fig. 4 is the revolved sectional view of B-B slice location among Fig. 1.
Among the figure:
The 1-pump housing, 2-axial inlet attachment hole, 3-radially exports attachment hole, 4-liquid reflux channel, 5-cavity.
Embodiment
Below in conjunction with embodiment the utility model is described in further detail.
As shown in figures 1 and 3, a kind of urea pump housing for the SCR metering injection system of the utility model, comprise the cavity 5 in the pump housing 1, the described pump housing 1 is provided with respectively the axial inlet attachment hole 2 that connects with described cavity 5 and radially exports attachment hole 3, be provided with the taper pipe thread structure in the described axial inlet attachment hole 2, as shown in Figure 2, the described attachment hole 3 that radially exports adopts the piston rod type sealing configuration with the sealing that is connected of associated part, the described pump housing 1 is provided with liquid reflux channel 4, the refluxing opening attachment hole of one end of described liquid reflux channel 4 and the pump housing 1 end face and cavity 5 connect, the other end of described liquid reflux channel 4 is auxiliary hole, is provided with jackscrew in the described auxiliary hole; Be provided with the taper pipe thread structure in the described refluxing opening attachment hole, the another port of described liquid reflux channel 4 is provided with auxiliary hole, as shown in Figure 4, solve a difficult problem that needs evacuation of liquid after the SCR metering injection system is shut down by this liquid reflux channel, in addition, the employing liquid reflux channel is integrated in the design of pump case, so that pump body structure is very compact; The material of the described pump housing 1 is metal, all can keep good intensity and toughness at high and low temperature state, satisfies under the automobile-used environment strict demand to the high low temperature of component, and can satisfy the specific (special) requirements of bearing the aqueous solution of urea corrosion.
Although the above is described the utility model in conjunction with figure; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; in the situation that does not break away from the utility model aim, can also make a lot of distortion, these all belong within the protection of the present utility model.
Claims (3)
1. urea pump housing that is used for the SCR metering injection system, comprise the cavity (5) in the pump housing (1), the described pump housing (1) is provided with respectively the axial inlet attachment hole (2) that connects with described cavity (5) and radially exports attachment hole (3), it is characterized in that, the described pump housing (1) is provided with liquid reflux channel (4), the refluxing opening attachment hole of one end of described liquid reflux channel (4) and the pump housing (1) end face and cavity (5) connect, the other end of described liquid reflux channel (4) is auxiliary hole, is provided with jackscrew in the described auxiliary hole; The material of the described pump housing (1) is metal.
2. described urea pump housing for the SCR metering injection system according to claim 1 is characterized in that, is provided with the taper pipe thread structure in the described axial inlet attachment hole (2).
3. described urea pump housing for the SCR metering injection system according to claim 1 is characterized in that, is provided with the taper pipe thread structure in the described refluxing opening attachment hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332505 CN202789500U (en) | 2012-07-10 | 2012-07-10 | Urea pump shell body for selective catalytic reduction (SCR) metering injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220332505 CN202789500U (en) | 2012-07-10 | 2012-07-10 | Urea pump shell body for selective catalytic reduction (SCR) metering injection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202789500U true CN202789500U (en) | 2013-03-13 |
Family
ID=47816771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220332505 Expired - Fee Related CN202789500U (en) | 2012-07-10 | 2012-07-10 | Urea pump shell body for selective catalytic reduction (SCR) metering injection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202789500U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150621A (en) * | 2015-04-01 | 2016-11-23 | 天纳克（苏州）排放系统有限公司 | Carbamide ejection assemblies |
-
2012
- 2012-07-10 CN CN 201220332505 patent/CN202789500U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106150621A (en) * | 2015-04-01 | 2016-11-23 | 天纳克（苏州）排放系统有限公司 | Carbamide ejection assemblies |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20180710 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |