CN206845433U - A kind of urea pump pumping diaphragm - Google Patents
A kind of urea pump pumping diaphragm Download PDFInfo
- Publication number
- CN206845433U CN206845433U CN201720675273.5U CN201720675273U CN206845433U CN 206845433 U CN206845433 U CN 206845433U CN 201720675273 U CN201720675273 U CN 201720675273U CN 206845433 U CN206845433 U CN 206845433U
- Authority
- CN
- China
- Prior art keywords
- pumping diaphragm
- urea pump
- rubber membrane
- pump pumping
- bolt head
- 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.)
- Expired - Fee Related
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- Reciprocating Pumps (AREA)
- Diaphragms And Bellows (AREA)
Abstract
The utility model provides a kind of urea pump pumping diaphragm, belongs to urea pump parts technical field.It solves the problems such as existing urea pump pumping diaphragm job insecurity, easily reveal.This urea pump pumping diaphragm, including fixing bolt and it is arranged at the rubber membrane of fixing bolt upper end, fixing bolt is connected with bolt head in the form of annular discs by stud and formed, the lower surface of bolt head is provided with cooperation step, rubber membrane lower surface has the bound edge for extending downwardly and wrapping bolt head, and the tail end of bound edge, with coordinating step to lean, rubber membrane has the reinforcement fibrous layers to play a supportive role in arc-shaped in the outside of bound edge opposite position to lower recess, rubber membrane laid inside.The utility model has the advantages that stable performance, high temperature resistant.
Description
Technical field
The utility model belongs to urea pump parts technical field, is related to a kind of pumping diaphragm, more particularly to a kind of urea pump pump
Film.
Background technology
SCR (SCR) technology for improve because exhaust emissions and caused by environmental pollution played significantly
Effect, urea pump is the core component of SCR system, and its performance and the discharge function of engine have close ties, and urea pump is
Urea liquid sprays the important component of metering system, and its major function is the urea liquid in extracted urea case, and is kept
Certain pressure, is then delivered to injection unit, and NOX is rapid in the tail gas of injection unit injection urea liquid and diesel emission
Reaction generation nitrogen and water, discharges N2 harmless to the human body into air, urea pump pumping diaphragm served in urea pump sealing,
The effect of anti-leak, the most material of pumping diaphragm on existing market is relatively simple, is made using traditional rubber to realize, due to bavin
Typically at 200-500 DEG C, traditional urea pump pumping diaphragm is oxidized easily the delivery temperature of oil machine under the working condition of high temperature, is made
Its performance changes, and influences the stability of urea pump work.
The content of the invention
The purpose of this utility model is to be directed to the above-mentioned problems in the prior art, there is provided a kind of high temperature resistant, performance
Stable urea pump pumping diaphragm.
The purpose of this utility model can be realized by following technical proposal：A kind of urea pump pumping diaphragm, including fixing bolt
And be arranged at the rubber membrane of fixing bolt upper end, it is characterised in that described fixing bolt by stud with it is in the form of annular discs
Bolt head, which is connected, to be formed, and the lower surface of the bolt head is provided with cooperation step, and described rubber membrane lower surface has to downward
The bound edge for wrapping bolt head is stretched, and the tail end of bound edge, with coordinating step to lean, the rubber membrane is in the corresponding position of bound edge
There are the reinforcement fibrous layers to play a supportive role in the outside put in arc-shaped to lower recess, described rubber membrane laid inside.
In a kind of above-mentioned urea pump pumping diaphragm, the reinforcement fibrous layers and the depression radian one of rubber membrane corresponding position
Cause.
In a kind of above-mentioned urea pump pumping diaphragm, the outer edge of the upper surface of the rubber membrane has half to raise up
Circular lip.Set lip to play a part of reducing stress impact and slow down edge abrasion in edge, improve pumping diaphragm
Service life.
In a kind of above-mentioned urea pump pumping diaphragm, offer between described stud and bolt head and tightened when being assembled for pumping diaphragm
Mating groove.
In a kind of above-mentioned urea pump pumping diaphragm, the periphery of the bolt head passes through round-corner transition.Fillet is set to keep away
Exempt from extruding of the fixing bolt periphery to rubber membrane, reduce the damage of rubber membrane.
In a kind of above-mentioned urea pump pumping diaphragm, the outer surface of the rubber membrane has tetrafluoro coating, the plating of described tetrafluoro
The thickness of layer is 0.3 millimeter.Tetrafluoro has resistant to elevated temperatures effect, can improve stability of the pumping diaphragm when hot environment works.
In a kind of above-mentioned urea pump pumping diaphragm, described rubber membrane is by ethylene propylene diene rubber machine-shaping.EPDM
Rubber has ageing-resistant, erosion-resisting feature, can improve the service life of pumping diaphragm.
Compared with prior art, reinforcement fibrous layers are equipped with the rubber membrane of this urea pump pumping diaphragm, enhance pumping diaphragm work
Stability, be coated with PTFE in the outer surface of rubber membrane, lift resistant to elevated temperatures ability, improve the service life of pumping diaphragm.
Brief description of the drawings
Fig. 1 is the structural representation of this urea pump pumping diaphragm.
In figure, 1, fixing bolt；2nd, rubber membrane；3rd, stud；4th, bolt head；5th, step is coordinated；6th, bound edge；7th, reinforcing fibre
Layer；8th, lip；9th, mating groove；10th, tetrafluoro coating.
Embodiment
It is specific embodiment of the utility model and with reference to accompanying drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these embodiments.
As shown in figure 1, this urea pump pumping diaphragm, including fixing bolt 1 and the rubber membrane for being arranged at the upper end of fixing bolt 1
2, fixing bolt 1 is connected with bolt head 4 in the form of annular discs by stud 3 and formed, and the lower surface of bolt head 4, which is provided with, coordinates step 5,
The lower surface of rubber membrane 2 has the bound edge 6 for extending downwardly and wrapping bolt head 4, and the tail end of bound edge 6 is with coordinating step 5 to offset
Lean on, rubber membrane 2 plays a supportive role in the outside of the opposite position of bound edge 6 in arc-shaped to lower recess, the laid inside of rubber membrane 2
Reinforcement fibrous layers 7.
Further describe in detail, reinforcement fibrous layers 7 are consistent with the depression radian of the corresponding position of rubber membrane 2.
In order to reduce stress impact and slow down edge abrasion, the outer edge of the upper surface of rubber membrane 2, which has, to raise up
Semicircle lip 8.
Further describe in detail, the mating groove 9 tightened when being assembled for pumping diaphragm is offered between stud 3 and bolt head 4.
In order to reduce the damage of rubber membrane 2, the periphery of bolt head 4 passes through round-corner transition.
In order to improve stability of the pumping diaphragm when hot environment works, the outer surface of rubber membrane 2 has tetrafluoro coating 10, institute
The thickness for the tetrafluoro coating 10 stated is 0.3 millimeter.
In order to improve the service life of pumping diaphragm, rubber membrane 2 is by ethylene propylene diene rubber machine-shaping.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement to described specific embodiment or using similar
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Although more used herein fixing bolt 1, rubber membrane 2, stud 3, bolt head 4, coordinate step 5, bound edge 6,
The terms such as reinforcement fibrous layers 7, lip 8, mating groove 9, tetrafluoro coating 10, but it is not precluded from the possibility using other terms.Make
It is used for the purpose of more easily describing and explaining essence of the present utility model with these terms；It is construed as any attached
The limitation added is all disagreed with the utility model spirit.
Claims (7)
1. a kind of urea pump pumping diaphragm, including fixing bolt（1）And it is arranged at fixing bolt（1）The rubber membrane of upper end（2）, its
It is characterised by, described fixing bolt（1）By stud（3）With bolt head in the form of annular discs（4）Be connected composition, the bolt head
（4）Lower surface be provided with cooperation step（5）, described rubber membrane（2）Lower surface, which has to extend downwardly, wraps bolt head（4）
Bound edge（6）, and bound edge（6）Tail end with coordinate step（5）Lean, the rubber membrane（2）In bound edge（6）Corresponding position
The outside put is in arc-shaped to lower recess, described rubber membrane（2）Laid inside has the reinforcement fibrous layers to play a supportive role（7）.
A kind of 2. urea pump pumping diaphragm according to claim 1, it is characterised in that described reinforcement fibrous layers（7）With rubber
Film（2）The depression radian of corresponding position is consistent.
A kind of 3. urea pump pumping diaphragm according to claim 1, it is characterised in that described rubber membrane（2）Upper surface
Outer edge has the semicircle lip to raise up（8）.
A kind of 4. urea pump pumping diaphragm according to claim 1, it is characterised in that described stud（3）With bolt head（4）It
Between offer the mating groove tightened when being assembled for pumping diaphragm（9）.
A kind of 5. urea pump pumping diaphragm according to claim 1, it is characterised in that the bolt head（4）Periphery pass through circle
Angle transition.
A kind of 6. urea pump pumping diaphragm according to claim 1, it is characterised in that the rubber membrane（2）Outer surface have
Tetrafluoro coating（10）, described tetrafluoro coating（10）Thickness be 0.3 millimeter.
A kind of 7. urea pump pumping diaphragm according to claim 1, it is characterised in that described rubber membrane（2）By EPDM
Rubber processing is molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720675273.5U CN206845433U (en) | 2017-06-12 | 2017-06-12 | A kind of urea pump pumping diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720675273.5U CN206845433U (en) | 2017-06-12 | 2017-06-12 | A kind of urea pump pumping diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206845433U true CN206845433U (en) | 2018-01-05 |
Family
ID=60799691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720675273.5U Expired - Fee Related CN206845433U (en) | 2017-06-12 | 2017-06-12 | A kind of urea pump pumping diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206845433U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718858A (en) * | 2021-08-31 | 2022-07-08 | 上海飞科电器股份有限公司 | Tooth flushing device |
-
2017
- 2017-06-12 CN CN201720675273.5U patent/CN206845433U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718858A (en) * | 2021-08-31 | 2022-07-08 | 上海飞科电器股份有限公司 | Tooth flushing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180105 Termination date: 20200612 |