CN207750226U - A kind of suck-back device of urea pump - Google Patents
A kind of suck-back device of urea pump Download PDFInfo
- Publication number
- CN207750226U CN207750226U CN201720992668.8U CN201720992668U CN207750226U CN 207750226 U CN207750226 U CN 207750226U CN 201720992668 U CN201720992668 U CN 201720992668U CN 207750226 U CN207750226 U CN 207750226U
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- hole
- flat valve
- iron core
- diaphragm
- cover board
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Abstract
The utility model discloses a kind of suck-back devices of urea pump comprising pedestal offers inlet and liquid outlet on pedestal；Cover board, cover plate for sealing is set on pedestal, and first through hole and the second through-hole are offered on cover board, 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 spool of energy automatic open-close；Diaphragm unit, including diaphragm iron core and the elastic membrane sheet body being wrapped in outside diaphragm iron core, elastic membrane sheet body is set to outside first through hole and the second through-hole, and its edge seal is fixed on cover board；And electromagnet assembly, magnet control diaphragm unit move reciprocatingly relative to cover board, cooperation import flat valve and the action for exporting flat valve completion suction, drain.
Description
Technical field
This application involves diesel motor exhaust post-processing technology field more particularly to a kind of suck-back devices, for no 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 mainstream is SCR technology at present, that is, uses aqueous solution of urea net as reducing agent
Change the nitrogen oxides in tail gas.Urea pump is the important component of urea liquid injection metering system, and effect is to nozzle
Medium with steady pressure is provided, pressure fluid sprays into offgas duct after nozzle atomization and is chemically reacted with tail gas, to
Remove the nitrogen oxides in tail gas.After urea pump is stopped, urea liquid should empty in pump and pipeline, otherwise will appear residual
Urea crystals or ice formation issues, either crystallization or ice formation issues are stayed all can greatly to damage urea pump, cause to fail.It is related
In a manner of pump that technology has proposition addition reversal valve to reverse the drain direction of pump or arrange a reversed drain again etc., but knot mostly
Structure complexity and maintenance cost are high.
Therefore, it is necessary to study a kind of novel suck-back device, to meet the needs of this field.
Utility model content
The purpose of this utility model is that propose a kind of suck-back device of novel urea pump, it is residual with urea in solution system
Stay that crystallization, complicated, maintenance cost is high, cannot be satisfied the problem of market new demand.
For this purpose, the utility model uses following technical scheme：
The conveying parallel connection of pumps of a kind of suck-back device of urea pump, suck-back device and urea pump, suck-back device include：
Pedestal offers inlet and liquid outlet on pedestal；
Cover board, cover plate for sealing are set on pedestal, and first through hole and the second through-hole are offered on cover board, 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 spool of folding；
Diaphragm unit, including diaphragm iron core and the elastic membrane sheet body that is wrapped in outside diaphragm iron core, elastic membrane sheet body are set to
Outside first through hole and the second through-hole, and its edge seal is fixed on cover board；
Electromagnet assembly, including electromagnet, resetting spring and the dynamic iron core being connect with diaphragm iron core, electromagnet assembly obtain electric
When, dynamic iron core band dynamic diaphragm iron core and elastic membrane sheet body integrally move up, and then form film between elastic membrane sheet body and cover board
The spool of piece side chamber, import flat valve is opened, and the spool for exporting flat valve is closed, and fluid is inhaled into diaphragm side chamber, electromagnet group
When part dead electricity, the elastic force of resetting spring pushes diaphragm iron core and elastic membrane sheet body integrally to move down, the spool of import flat valve
It closes, the spool for exporting flat valve is opened, and fluid is discharged from diaphragm side chamber.
Wherein, import flat valve is identical with the outlet structure of flat valve, includes valve body and spool, spool can be relative to valve
Body is set in valve body up or down.
Wherein, the liquid outlet of first through hole and the second through-hole corresponds to spool and is provided with lug boss.The structure of protrusion to match
The sealing effect for flowing valve is more preferable.
Wherein, import flat valve is corresponded on cover board and outlet flat valve offers the first slot and the second slot, the first slot respectively
Be all higher than with the depth of the second slot or equal to valve body height.
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 resists import flow
Valve.
Wherein, first through hole, import flat valve, diaphragm iron core are coaxial.Convenient for providing maximum suction at first through hole
Power, and facilitate diaphragm iron core to compress import flat valve and block first through hole.
Wherein, cover board insertion is set on pedestal, is sealed by O-ring between cover board and pedestal.Prevent two channels pair
Two through holes should be connected, and there are solution and pressure leakages.
Wherein, the contact surface of cover board and elastic membrane sheet body is set as concave, and elastic membrane sheet body is correspondingly arranged as convex.Concave
When design makes suction, drain, the liquid in feed pathway is more easy to enter in liquid outlet channel.
The beneficial effects of the utility model are that the suck-back device of the urea pump, passes through electromagnetism compared with prior art
Iron drive flexible sheet action, may be implemented electromagnet must not electricity when, suck-back device is obstructed, electromagnet persistently it is electric when, resorption
The feed pathway of device is connected to liquid outlet channel, reaches the function of reversal valve；When electromagnet obtains electric with a certain frequency, suck-back device
Realize inhale, the function of drain, have simple in structure, manufacture, maintenance cost are low, the strong advantage of resorption ability, and have change simultaneously
To valve and drawing liquid pumping function.
Description of the drawings
Fig. 1 is position view of the suck-back device for the urea pump that the utility model embodiment 1 provides in urea pump；
Fig. 2 is the structural schematic diagram of the suck-back device for the urea pump that the utility model embodiment 1 provides；
Fig. 3 is the enlarged drawing at A in Fig. 2；
Fig. 4 is the structural schematic diagram of the import flat valve of the suck-back device for the urea pump that the utility model embodiment 1 provides；
Fig. 5 is B-B direction sectional view in Fig. 4；
Fig. 6 is the structural schematic diagram of the suck-back device for the urea pump that the utility model embodiment 2 provides.
Specific implementation mode
Further illustrate the technical solution of the utility model below with reference to the accompanying drawings and specific embodiments.
Embodiment 1：
As shown in Figs. 1-3, in the present embodiment, the suck-back device 1 of urea pump provided by the utility model is defeated with urea pump
Send pump 2 in parallel, wherein suck-back device 1 includes：
Pedestal 11 is provided with inlet 111 and liquid outlet 112 on pedestal 11, and inlet 111 is not connected to liquid outlet 112；
Cover board 12, cover board 12 insertion be set on pedestal 11, and with 113 palette of the first end face of pedestal 11, cover board
First through hole 121 and the second through-hole 122 are 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 board 12 is extended at two Kong Juncong first end faces 113
Second end face 126 on, the outlet end of first through hole 121 and the second through-hole 122 is respectively arranged with import flat valve 15 and outlet
Flat valve 16, import flat valve 15 and outlet flat valve 16 include the spool of energy automatic open-close；
Diaphragm unit 13, including diaphragm iron core 131 and the elastic membrane sheet body 132 being wrapped in outside diaphragm iron core 131, elastic membrane
Sheet body 132 is set to first through hole 121 and the second through-hole outer 122, fits in second end face 126, and its edge seal is fixed on
On cover board 12；
Electromagnet assembly 14, including electromagnet 142, resetting spring 143 and the dynamic iron core 141 being connect 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 132 entirety of elastic membrane sheet body, and then bullet
Property membrane body 132 and cover board 12 between form diaphragm side chamber, the spool of import flat valve 15 is opened, and the spool of flat valve 16 is exported
It closes, fluid is inhaled into diaphragm side chamber, and when 14 dead electricity of electromagnet assembly, the elastic force of resetting spring 143 pushes 131 He of diaphragm iron core
Elastic membrane sheet body 132 is whole to be moved down, and the spool of import flat valve 15 is closed, and the spool of outlet flat valve 16 is opened, fluid
It is discharged from diaphragm side chamber.
Wherein, referring to Fig. 4-5, import flat valve 15 is identical as the outlet structure of flat valve 16, includes spool 151 and valve
Body 152, valve body 152 are rigid material, and spool 151 is round rubber part, and diameter is more than first through hole 121 and the second through-hole
122 aperture, elastic connection between spool 151 and valve body 152, spool 151 can be up or down set to relative to valve body 152
In valve body 152.Two flat valves are similar to check valve, and its spool is automatically moved up by the negative pressure of diaphragm side chamber, control
First through hole 121 is opened, and the second through-hole 122 is closed.
121 aperture of first through hole in first slot 123 is set as tapered protrusion 125, the second through-hole in the second slot 124
122 apertures are set as tapered protrusion 125.The structure of tapered protrusion 125 makes the sealing effect of flat valve more preferable.
Import flat valve 15 is corresponded on cover board 12 and outlet flat valve 16 offers the first slot 123 and the second slot 124 respectively,
I.e. the first slot 123 is opened at second end face 126, and the second slot 124 is opened at first end face 113, the first slot 123 and the second slot 124
Depth be all higher than or equal to valve body 152 height.
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 resists import
The edge of elastic membrane sheet body 132 is fixed on cover board 12 by flat valve 15, electromagnet 142.
First through hole 121, import flat valve 15, diaphragm iron core 131 are coaxial.Convenient for being provided most at first through hole 121
Big suction, and facilitate diaphragm iron core 131 to compress import flat valve 15 and block first through hole 121.
It is sealed by O-ring 17 between cover board 12 and pedestal 11.It prevents from two channels to be correspondingly connected with two through holes to exist
Solution and pressure leakages.Inlet 111 is avoided directly to be connected to by fit-up gap with liquid outlet 112, it can not work so as to cause pump
Make.
Cover board 12 and contact surface, that is, second end face 126 of elastic membrane sheet body 132 are set as concave, and elastic membrane sheet body 132 is right
It should be set as convex.When concave design makes suction, drain, 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, and electromagnet assembly 14 may be implemented not
It is electric when, suck-back device 1 is obstructed, electromagnet assembly 14 persistently it is electric when, suck-back device 1 inlet 111 and liquid outlet 112 company
It is logical, reach the function of reversal valve；When electromagnet assembly 14 obtains electric with a certain frequency, suck-back device 1 realizes the function of suction, drain,
With simple in structure, 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 resetting spring 143 elastic force and its own gravity
Diaphragm unit 13 is pushed down in the second end face 126 of cover board 12, seals first through hole 121 and the second through-hole 122 so that the device
Inlet 111 is not connected to liquid outlet 112.Wherein, 151 side of spool of import flat valve 15 is pressed by diaphragm unit 13, separately
Side is constrained by the conical surface, and since spool 151 is made of rubber, spool 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 intermediate position move up, shape
At the chamber that is connected to of first through hole 121 and the second through-hole 122, import flat valve 15 and outlet 16 release of pressure of flat valve are opened naturally, shape
At the access of inlet 111 and liquid outlet 112.
Above two situation makes the device have the function of reversal valve, can control logical/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 moves up, and forms imbibition chamber, and import flat valve 15 is moved up by suction, and first through hole 121 detaches, and exports flat valve 16
It is moved up by suction, blocks the second through-hole 122, solution enters to imbibition chamber from inlet 111, completes imbibition action；When power-off,
Dynamic iron core 141 declines with diaphragm unit 13, and first through hole 121 is blocked in the compression of import flat valve 15, and outlet 16 release of pressure of flat valve is beaten
It opens, the solution in imbibition chamber is discharged from the second through-hole 122 through liquid outlet 112, completes drain action.
Said circumstances make the device have the function of drawing liquid pump, can realize suction, drain.
It should be noted that in the present embodiment, 143 elastic force of resetting spring needed for realization sealing at second end face 126
Size depends on the factors such as device inlet hydraulic, 151 rigidity of spool, 141 stroke of dynamic iron core, 14 suction of electromagnet assembly, in office
In the case of a kind of what determining parameter, it can realize that the highest fluid pressure of sealing is certain value, can be calculated.Wherein, electric
14 dynamic iron core of magnet assemblies, 141 stroke 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 the power of sealing is carried by 143 elastic force of resetting spring and the gravity of 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 13 holddown plate 12 of diaphragm unit, when electromagnet assembly 14 must not be electric, by resetting spring
143 effects, diaphragm unit 13 are pulled up, and realize that imbibition, import flat valve 15 seal suction of the required power by electromagnet assembly 14
Power provides.Rest part is identical as the structure of embodiment 1.
The above content is only the preferred embodiment of the utility model, for those of ordinary skill in the art, according to this reality
With novel thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as
Limitations of the present invention.
Claims (8)
1. a kind of suck-back device of urea pump, which is characterized in that including：
Pedestal offers inlet and liquid outlet on the pedestal；
Cover board, the cover plate for sealing are set on the pedestal, and first through hole and the second through-hole are offered on the cover board, institute
It states 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 channel, the first through hole and second through-hole is respectively arranged with import flat valve and outlet flat valve, institute
It states import flat valve and the outlet flat valve includes the spool of energy automatic open-close；
Diaphragm unit, the diaphragm unit includes diaphragm iron core and the elastic membrane sheet body that is wrapped in outside the diaphragm iron core, described
Elastic membrane sheet body is set to outside the first through hole and second through-hole, and its edge seal is fixed on the cover board；
Electromagnet assembly, the electromagnet assembly include electromagnet, resetting spring and the dynamic iron core being connect with the diaphragm iron core,
When electromagnet assembly obtains electric, the dynamic iron core drives the diaphragm iron core and the elastic membrane sheet body integrally to move up, in turn
Diaphragm side chamber is formed between the elastic membrane sheet body and the cover board, the spool of the import flat valve is opened, and the outlet is matched
The spool for flowing valve is closed, and fluid sucks diaphragm side chamber, and when electromagnet assembly dead electricity, the elastic force of the resetting spring pushes the film
Piece iron core and the elastic membrane sheet body integrally move down, and the spool of the import flat valve is closed, the outlet flat valve
Spool 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, includes valve body and spool, and the spool can be set to institute up or down relative to the valve body
It states 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 in hole corresponds to the spool and is provided with lug boss.
4. the suck-back device of urea pump according to claim 1, it is characterised in that：The import is corresponded on the cover board to match
Stream valve and the outlet flat valve offer the first slot and the second slot 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 resists 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
It is coaxial to flow valve, the diaphragm iron core.
7. the suck-back device of urea pump according to claim 1, it is characterised in that：The cover board insertion is set to the base
On seat, sealed by O-ring between the cover board and the pedestal.
8. the suck-back device of urea pump according to claim 1, it is characterised in that：The cover board and the elastic membrane sheet body
Contact surface be set as concave, the elastic membrane sheet body is correspondingly arranged as convex.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720992668.8U CN207750226U (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 |
|---|---|---|---|
| CN201720992668.8U CN207750226U (en) | 2017-08-09 | 2017-08-09 | A kind of suck-back device of urea pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207750226U true CN207750226U (en) | 2018-08-21 |
Family
ID=63146718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720992668.8U Expired - Fee Related CN207750226U (en) | 2017-08-09 | 2017-08-09 | A kind of suck-back device of urea pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207750226U (en) |
Cited By (1)
| 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 |
-
2017
- 2017-08-09 CN CN201720992668.8U patent/CN207750226U/en not_active Expired - Fee Related
Cited By (2)
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210802 Address after: No. 169, Wei'an Road, high tech Zone, Weifang, Shandong 261000 Patentee after: WEICHAI POWER AIR PURIFICATION TECHNOLOGY Co.,Ltd. Patentee after: HUST-WUXI Research Institute Patentee after: XI'AN QINTAI AUTOMOBILE EMISSION TECHNOLOGY Co.,Ltd. Address before: 214174 329 Weir Road, Huishan District, Wuxi, Jiangsu Patentee before: HUST-WUXI Research Institute |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |