CN206845433U - A kind of urea pump pumping diaphragm - Google Patents

A kind of urea pump pumping diaphragm Download PDF

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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
Application number
CN201720675273.5U
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Chinese (zh)
Inventor
王新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Luminescent Rubber Seal Ltd By Share Ltd
Original Assignee
Zhejiang Luminescent Rubber Seal Ltd By Share Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Luminescent Rubber Seal Ltd By Share Ltd filed Critical Zhejiang Luminescent Rubber Seal Ltd By Share Ltd
Priority to CN201720675273.5U priority Critical patent/CN206845433U/en
Application granted granted Critical
Publication of CN206845433U publication Critical patent/CN206845433U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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  • 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

A kind of urea pump pumping diaphragm
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.
CN201720675273.5U 2017-06-12 2017-06-12 A kind of urea pump pumping diaphragm Expired - Fee Related CN206845433U (en)

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

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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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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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