CN107327400A - A kind of suck-back device of urea pump - Google Patents
A kind of suck-back device of urea pump Download PDFInfo
- Publication number
- CN107327400A CN107327400A CN201710674299.2A CN201710674299A CN107327400A CN 107327400 A CN107327400 A CN 107327400A CN 201710674299 A CN201710674299 A CN 201710674299A CN 107327400 A CN107327400 A CN 107327400A
- Authority
- CN
- China
- Prior art keywords
- hole
- valve
- iron core
- cover plate
- diaphragm
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
Abstract
The invention discloses a kind of suck-back device of urea pump, it includes offering inlet and liquid outlet on pedestal, pedestal；Cover plate, cover plate for sealing is arranged on pedestal, and first through hole and the second through hole are offered on cover plate, first through hole is connected to form feed pathway with inlet, second through hole is connected to form liquid outlet channel with liquid outlet, the outlet end of first through hole and the second through hole is respectively arranged with import flat valve and outlet flat valve, and import flat valve and outlet flat valve include the valve element of energy automatic open-close；Diaphragm unit, including diaphragm iron core and the elastic membrane lamellar body being wrapped in outside diaphragm iron core, elastic membrane lamellar body is arranged at outside first through hole and the second through hole, and its edge seal is fixed on cover plate；And electromagnet assembly, magnet control diaphragm unit moves reciprocatingly relative to cover plate, coordinates import flat valve and outlet flat valve to complete to inhale, the action of discharge opeing.
Description
Technical field
The application is related to diesel motor exhaust post-processing technology field, more particularly to a kind of suck-back device, for without sky
In gas assist type urea pump.
Background technology
Internal purification technology can not fully meet increasingly harsh discharge standard, therefore install tail gas additional to Diesel engine
After-treatment device becomes necessity.The post-processing technology of current main flow is SCR technology, i.e., net as reducing agent with aqueous solution of urea
Change the nitrogen oxides in tail gas.Urea pump is the important component that urea liquid sprays metering system, and its effect is to nozzle
The medium with steady pressure is provided, pressure fluid sprays into offgas duct after nozzle atomization and chemically reacted with tail gas, so that
Remove the nitrogen oxides in tail gas.After urea pump is stopped, urea liquid should be emptied in pump and pipeline, otherwise be occurred residual
Urea crystals or ice formation issues are stayed, either crystallization or ice formation issues all can greatly damage urea pump, cause failure.It is related
Technology has the mode such as pump for proposing addition reversal valve to reverse the discharge opeing direction of pump or arrange a reverse discharge opeing again, but ties mostly
Structure is complicated and maintenance cost is high.
Accordingly, it would be desirable to a kind of new suck-back device be studied, to meet the demand of this area.
The content of the invention
It is an object of the invention to propose a kind of suck-back device of new urea pump, with residual urea knot in solution system
Brilliant, complicated, maintenance cost is high, the problem of can not meet market new demand.
For up to this purpose, the present invention uses following technical scheme：
A kind of conveying parallel connection of pumps of suck-back device of urea pump, suck-back device and urea pump, suck-back device includes：
Inlet and liquid outlet are offered on pedestal, pedestal；
Cover plate, cover plate for sealing is arranged on pedestal, and offers first through hole and the second through hole on cover plate, first through hole with
Inlet is connected to form feed pathway, and the second through hole is connected to form liquid outlet channel with liquid outlet, and first through hole and second is led to
The outlet end in hole is respectively arranged with import flat valve and outlet flat valve, and import flat valve and outlet flat valve include can be automatic
The valve element of folding；
Diaphragm unit, including diaphragm iron core and the elastic membrane lamellar body being wrapped in outside diaphragm iron core, elastic membrane lamellar body are arranged at
Outside first through hole and the second through hole, and its edge seal is fixed on cover plate；
Electromagnet assembly, including electromagnet, back-moving spring and the dynamic iron core being connected with diaphragm iron core, electromagnet assembly obtains electric
When, dynamic iron core band dynamic diaphragm iron core and elastic membrane lamellar body are integrally moved up, and then form film between elastic membrane lamellar body and cover plate
Piece side chamber, the valve element of import flat valve is opened, and the valve element of outlet flat valve is closed, and fluid is inhaled into diaphragm side chamber, electromagnet group
During part dead electricity, the elastic force of back-moving spring promotes diaphragm iron core and elastic membrane lamellar body integrally to move down, the valve element of import flat valve
Close, the valve element of outlet flat valve is opened, and fluid is discharged from diaphragm side chamber.
Wherein, import flat valve is identical with the structure of outlet flat valve, and including valve body and valve element, valve element can be relative to valve
Body is arranged in valve body up or down.
Wherein, first through hole valve element corresponding with the liquid outlet of the second through hole is provided with lug boss.Raised structure to match somebody with somebody
The sealing effectiveness for flowing valve is more preferable.
Wherein, correspondence import flat valve and outlet flat valve offer the first groove and the second groove, the first groove respectively on cover plate
It is all higher than with the depth of the second groove or equal to the height of valve body.
Wherein, one end of diaphragm iron core is connected through a screw thread with dynamic iron core, and the other end of diaphragm iron core props up import flow
Valve.
Wherein, first through hole, import flat valve, diaphragm iron core are coaxial.It is easy at first through hole provide maximum suction
Power, and facilitate diaphragm iron core compression import flat valve to block first through hole.
Wherein, cover plate insertion is arranged on pedestal, is sealed between cover plate and pedestal by O-ring.Prevent two passages pair
Two through holes should be connected and there are solution and pressure leakages.
Wherein, the contact surface of cover plate and elastic membrane lamellar body is set to matrix, and elastic membrane lamellar body is correspondingly arranged as convex.Matrix
When design causes suction, discharge opeing, the liquid in feed pathway is more easy to enter in liquid outlet channel.
Beneficial effects of the present invention are that the suck-back device of described urea pump, is driven by electromagnet compared with prior art
Dynamic elasticity diaphragm act, it is possible to achieve electromagnet must not electricity when, suck-back device is obstructed, electromagnet persistently it is electric when, suck-back device
Feed pathway connected with liquid outlet channel, reach the function of reversal valve；When electromagnet obtains electric with a certain frequency, suck-back device is realized
Inhale, the function of discharge opeing, with simple in construction, manufacture, maintenance cost are low, the strong advantage of resorption ability, and have reversal valve simultaneously
With drawing liquid pumping function.
Brief description of the drawings
Fig. 1 is position view of the suck-back device for the urea pump that the embodiment of the present invention 1 is provided in urea pump；
Fig. 2 is the structural representation of the suck-back device for the urea pump that the embodiment of the present invention 1 is provided；
Fig. 3 is the enlarged drawing at A in Fig. 2；
Fig. 4 is the structural representation of the import flat valve of the suck-back device for the urea pump that the embodiment of the present invention 1 is provided；
Fig. 5 is B-B direction sectional view in Fig. 4；
Fig. 6 is the structural representation of the suck-back device for the urea pump that the embodiment of the present invention 2 is provided.
Embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by embodiment.
Embodiment 1：
As Figure 1-3, in the present embodiment, the suck-back device 1 for the urea pump that the present invention is provided and the delivery pump 2 of urea pump
Parallel connection, wherein, suck-back device 1 includes：
Inlet 111 and liquid outlet 112 are provided with pedestal 11, pedestal 11, inlet 111 is not connected with liquid outlet 112；
Cover plate 12, cover plate 12 insertion be arranged on pedestal 11, and with the palette of first end face 113 of pedestal 11, cover plate
The through hole 122 of first through hole 121 and second is offered on 12, first through hole 121 is connected to form feed pathway with inlet 111,
Second through hole 122 is connected to form liquid outlet channel with liquid outlet 112, and cover plate 12 is extended at two Kong Juncong first end faces 113
Second end face 126 on, the outlet end of the through hole 122 of first through hole 121 and second is respectively arranged with import flat valve 15 and outlet
Flat valve 16, import flat valve 15 and outlet flat valve 16 include the valve element of energy automatic open-close；
Diaphragm unit 13, including diaphragm iron core 131 and the elastic membrane lamellar body 132 being wrapped in outside diaphragm iron core 131, elastic membrane
Lamellar body 132 is arranged at the through hole of first through hole 121 and second outer 122, fits in second end face 126, and its edge seal is fixed on
On cover plate 12；
Electromagnet assembly 14, including electromagnet 142, back-moving spring 143 and the dynamic iron core 141 being connected with diaphragm iron core 131,
When electromagnet assembly 14 obtains electric, dynamic iron core 141 is moved up with dynamic diaphragm iron core 131 and the entirety of elastic membrane lamellar body 132, and then bullet
Property membrane body 132 and cover plate 12 between form diaphragm side chamber, the valve element of import flat valve 15 is opened, and exports the valve element of flat valve 16
Close, fluid is inhaled into diaphragm side chamber, during 14 dead electricity of electromagnet assembly, the elastic force of back-moving spring 143 promotes the He of diaphragm iron core 131
Elastic membrane lamellar body 132 is overall to be moved down, and the valve element of import flat valve 15 is closed, and the valve element of outlet flat valve 16 is opened, fluid
From the discharge of diaphragm side chamber.
Wherein, referring to Fig. 4-5, import flat valve 15 is identical with the structure for exporting flat valve 16, including valve element 151 and valve
Body 152, valve body 152 is rigid material, and valve element 151 is round rubber part, and diameter is more than the through hole of first through hole 121 and second
122 aperture, elastic connection between valve element 151 and valve body 152, valve element 151 can be up or down arranged at relative to valve body 152
In valve body 152.Two flat valves are similar to check valve, and its valve element is automatically moved up by the negative pressure of diaphragm side chamber, is controlled
First through hole 121 is opened, and the second through hole 122 is closed.
The aperture of first through hole 121 in first groove 123 is set to the second through hole in tapered protrusion 125, the second groove 124
122 apertures are set to tapered protrusion 125.The structure of tapered protrusion 125 make it that the sealing effectiveness of flat valve is more preferable.
Correspondence import flat valve 15 and outlet flat valve 16 offer the first groove 123 and the second groove 124 respectively on cover plate 12,
I.e. the first groove 123 is opened at second end face 126, and the second groove 124 is opened at first end face 113, the first groove 123 and the second groove 124
Depth be all higher than or equal to the height of valve body 152.
One end of diaphragm iron core 131 is connected through a screw thread with dynamic iron core 141, and the other end of diaphragm iron core 131 props up import
The edge of elastic membrane lamellar body 132 is fixed on cover plate 12 by flat valve 15, electromagnet 142.
First through hole 121, import flat valve 15, diaphragm iron core 131 are coaxial.It is easy to provide most at first through hole 121
Big suction, and facilitate the compression import of diaphragm iron core 131 flat valve 15 to block first through hole 121.
Sealed between cover plate 12 and pedestal 11 by O-ring 17.Prevent two passage correspondence connections, two through holes from existing
Solution and pressure leakages.Inlet 111 is avoided directly to be connected by fit-up gap with liquid outlet 112, so as to cause pump can not work
Make.
The contact surface of cover plate 12 and elastic membrane lamellar body 132 is that second end face 126 is set to matrix, 132 pairs of elastic membrane lamellar body
Convex should be set to.When matrix design causes suction, discharge opeing, the liquid in feed pathway is more easy to enter in liquid outlet channel.
The suck-back device 1 drives diaphragm unit 13 to act by electromagnet assembly 14, it is possible to achieve electromagnet assembly 14 is not
It is electric when, suck-back device 1 is obstructed, electromagnet assembly 14 persistently it is electric when, the inlet 111 and liquid outlet 112 of suck-back device 1 connect
It is logical, reach the function of reversal valve；When electromagnet assembly 14 obtains electric with a certain frequency, suck-back device 1 realizes suction, the function of discharge opeing,
With simple in construction, manufacture, maintenance cost are low, the strong advantage of resorption ability, and have reversal valve and drawing liquid pumping function simultaneously.
When electromagnet assembly 14 must not be electric, dynamic iron core 141, will by the effect of the elastic force of back-moving spring 143 and self gravitation
Diaphragm unit 13 is pushed down in the second end face 126 of cover plate 12, seals the through hole 122 of first through hole 121 and second so that the device
Inlet 111 is not connected with liquid outlet 112.Wherein, the side of valve element 151 of import flat valve 15 is pressed by diaphragm unit 13, separately
Side is constrained by the conical surface, and because valve element 151 is made up of rubber, valve element 151 deforms and is fitted in completely under force
On sealing surface, to block first through hole 121.
When electromagnet assembly 14 persistently it is electric when, dynamic iron core 141 drive diaphragm unit 13 middle part move up, shape
Into first through hole 121 and the chamber that connects of the second through hole 122, import flat valve 15 and the outlet release of pressure of flat valve 16 are opened naturally, shape
Into inlet 111 and the path of liquid outlet 112.
Above two situation causes the device to have the function of reversal valve, can control to lead to/short circuit.
When electromagnet assembly 14 must be powered off with a certain frequency, when obtaining electric, dynamic iron core 141 drives the centre of diaphragm unit 13
Position is moved up, and forms imbibition chamber, and import flat valve 15 is moved up by suction, and first through hole 121 is separated, and exports flat valve 16
Moved up by suction, block the second through hole 122, solution enters to imbibition chamber from inlet 111, complete imbibition action；During power-off,
Dynamic iron core 141 declines with diaphragm unit 13, and import flat valve 15, which is pressurized, blocks first through hole 121, and the outlet release of pressure of flat valve 16 is beaten
Open, the solution in imbibition chamber is discharged from the second through hole 122 through liquid outlet 112, complete discharge opeing action.
Said circumstances causes the device to have the function of drawing liquid pump, can realize suction, discharge opeing.
It should be noted that in the present embodiment, the elastic force of back-moving spring 143 needed for realization sealing at second end face 126
Size depends on the factors such as device inlet hydraulic, the rigidity of valve element 151, the stroke of dynamic iron core 141, the suction of electromagnet assembly 14, in office
In the case of a kind of what determination parameter, it can realize that sealed highest fluid pressure is certain value, can calculate.Wherein, it is electric
The stroke of 14 dynamic iron core of magnet assemblies 141 is limited by internal structure, is definite value.
Embodiment 2：
Referring to Fig. 6, the present embodiment with embodiment 1 main difference is that：Diaphragm unit 13 is by diaphragm iron core in embodiment 1
131 compress import flat valve 15, and sealed power is carried by the gravity of the elastic force of back-moving spring 143 and dynamic iron core 141 and diaphragm unit 13
For, and embodiment 2 changes the internal structure of electromagnet assembly 14, that is, changes the moving direction of dynamic iron core 141, when electromagnet group
When part 14 obtains electric, dynamic iron core 141 drives the holddown plate 12 of diaphragm unit 13, when electromagnet assembly 14 must not be electric, by back-moving spring
143 effects, diaphragm unit 13 is pulled up, and realizes imbibition, and import flat valve 15 seals suction of the required power by electromagnet assembly 14
Power is provided.Remainder is identical with the structure of embodiment 1.
Above content is only presently preferred embodiments of the present invention, for one of ordinary skill in the art, according to the present invention's
Thought, will change in specific embodiments and applications, and this specification content should not be construed as to the present invention
Limitation.
Claims (8)
1. a kind of suck-back device of urea pump, it is characterised in that including：
Inlet and liquid outlet are offered on pedestal, the pedestal；
Cover plate, the cover plate for sealing is arranged on the pedestal, and first through hole and the second through hole, institute are offered on the cover plate
State first through hole to be connected to form feed pathway with the inlet, second through hole is connected to be formed out with the liquid outlet
The outlet end of liquid passage, the first through hole and second through hole is respectively arranged with import flat valve and outlet flat valve, institute
Stating import flat valve and the outlet flat valve includes the valve element of energy automatic open-close；
Diaphragm unit, the diaphragm unit includes diaphragm iron core and the elastic membrane lamellar body being wrapped in outside the diaphragm iron core, described
Elastic membrane lamellar body is arranged at outside the first through hole and second through hole, and its edge seal is fixed on the cover plate；
Electromagnet assembly, the electromagnet assembly includes electromagnet, back-moving spring and the dynamic iron core being connected with the diaphragm iron core,
When electromagnet assembly obtains electric, the dynamic iron core drives the diaphragm iron core and the elastic membrane lamellar body integrally to move up, and then
Diaphragm side chamber is formed between the elastic membrane lamellar body and the cover plate, the valve element of the import flat valve is opened, and the outlet is matched somebody with somebody
The valve element for flowing valve is closed, fluid suction diaphragm side chamber, and during electromagnet assembly dead electricity, the elastic force of the back-moving spring promotes the film
Piece iron core and the elastic membrane lamellar body are integrally moved down, and the valve element of the import flat valve is closed, the outlet flat valve
Valve element is opened, and fluid is discharged from diaphragm side chamber.
2. the suck-back device of urea pump according to claim 1, it is characterised in that：The import flat valve and the outlet
The structure of flat valve is identical, including valve body and valve element, and the valve element can be arranged at institute up or down relative to the valve body
State in valve body.
3. the suck-back device of urea pump according to claim 2, it is characterised in that：The first through hole and described second is led to
The liquid outlet correspondence valve element in hole is provided with lug boss.
4. the suck-back device of urea pump according to claim 1, it is characterised in that：The correspondence import is matched somebody with somebody on the cover plate
Stream valve and the outlet flat valve offer the first groove and the second groove respectively.
5. the suck-back device of urea pump according to claim 1, it is characterised in that：One end of the diaphragm iron core with it is described
Dynamic iron core is connected through a screw thread, and the other end of the diaphragm iron core props up the import flat valve.
6. the suck-back device of urea pump according to claim 5, it is characterised in that：The first through hole, the import are matched somebody with somebody
Flow valve, the diaphragm iron core coaxial.
7. the suck-back device of urea pump according to claim 1, it is characterised in that：The cover plate insertion is arranged at the base
On seat, sealed between the cover plate and the pedestal by O-ring.
8. the suck-back device of urea pump according to claim 1, it is characterised in that：The cover plate and the elastic membrane lamellar body
Contact surface be set to matrix, the elastic membrane lamellar body is correspondingly arranged as convex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710674299.2A CN107327400A (en) | 2017-08-09 | 2017-08-09 | A kind of suck-back device of urea pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710674299.2A CN107327400A (en) | 2017-08-09 | 2017-08-09 | A kind of suck-back device of urea pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107327400A true CN107327400A (en) | 2017-11-07 |
Family
ID=60198926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710674299.2A Withdrawn CN107327400A (en) | 2017-08-09 | 2017-08-09 | A kind of suck-back device of urea pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107327400A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110985170A (en) * | 2019-12-18 | 2020-04-10 | 华中科技大学 | Non-air-assisted urea pump adopting novel reversing valve and application thereof |
| CN111608772A (en) * | 2019-02-25 | 2020-09-01 | 赵晖 | Urea conveying pumpback pump core, device and SCR system |
-
2017
- 2017-08-09 CN CN201710674299.2A patent/CN107327400A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608772A (en) * | 2019-02-25 | 2020-09-01 | 赵晖 | Urea conveying pumpback pump core, device and SCR system |
| CN111608772B (en) * | 2019-02-25 | 2024-03-22 | 西安秦泰汽车排放技术有限公司 | Urea conveying back-pumping pump core, device and SCR system |
| CN110985170A (en) * | 2019-12-18 | 2020-04-10 | 华中科技大学 | Non-air-assisted urea pump adopting novel reversing valve and application thereof |
| CN110985170B (en) * | 2019-12-18 | 2021-01-19 | 华中科技大学 | Non-gas-assisted urea pump and application thereof |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20171107 |