CN202745970U - Secondary cylindrical surface sealing structure for metering spray nozzle - Google Patents
Secondary cylindrical surface sealing structure for metering spray nozzle Download PDFInfo
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- CN202745970U CN202745970U CN 201220437975 CN201220437975U CN202745970U CN 202745970 U CN202745970 U CN 202745970U CN 201220437975 CN201220437975 CN 201220437975 CN 201220437975 U CN201220437975 U CN 201220437975U CN 202745970 U CN202745970 U CN 202745970U
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- nozzle valve
- spray nozzle
- valve seat
- nozzle
- spool
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Abstract
The utility model discloses a secondary cylindrical surface sealing structure for a metering spray nozzle. The secondary cylindrical surface sealing structure for the metering spray nozzle comprises a spray nozzle valve body, a spray nozzle valve element, a spray nozzle valve seat, sprayed liquid inlets, a sprayed liquid outlet and an electromagnetic valve part, wherein the spray nozzle valve seat is arranged in the spray nozzle valve body; the spray nozzle valve element is arranged in the spray nozzle valve seat; the upper end of the spray nozzle valve element is connected with the electromagnetic valve part; an elastic sealing rubber plate is arranged between the upper part of the spray nozzle valve element and the spray nozzle valve body for partition; the sprayed liquid inlets are correspondingly formed on the spray nozzle valve body and the spray nozzle valve seat; and the sprayed liquid outlet is formed on the spray nozzle valve seat; the spray nozzle valve element comprises a front section and a rear section; the diameter of the front section part of the spray nozzle valve element is less than that of the rear section part; the rear section part of the spray nozzle valve element is provided with a section of ring groove; front and rear cylindrical surfaces of the ring groove form cylindrical surface seal respectively together with the spray nozzle valve seat under a non-spraying liquid state; and the ring groove is communicated with the sprayed liquid inlets and the sprayed liquid outlet when the valve element is sucked by the electromagnetic valve part. The sealing structure not only is low in cost, but also has a good sealing effect and works reliably and stably.
Description
Technical field
The utility model relates to a kind of metering pump nozzle, relates in particular to a kind of sealing configuration of the measuring jet for the vehicle exhaust processing system.
Background technique
Selective catalytic reduction system operating SCR(Selective Catalyst Reduction) is a processing system to downstream working medium, its principle is exactly to spray into ammonia in containing the tail gas of NOx, urea or other nitrogen-containing compound, make NOx wherein be reduced into N2 and water, be used at present in the diesel engine vent gas processing procedure.
Selective catalytic reduction system operating SCR must accurately control and spray into ammonia, the straying quatity of urea or other nitrogen-containing compound, in order to remove to greatest extent NOx, therefore metering pump becomes the requisite constituent element of selective catalytic reduction system operating SCR, and nozzle especially metering pump be used for control spray into the ammonia amount vitals.
See also illustrated in figures 1 and 2ly, Fig. 1 is the structural representation of sealed nozzle state of the metering pump of traditional vehicle exhaust processing system, and Fig. 2 is the structural representation of nozzle hydrojet state of the metering pump of traditional vehicle exhaust processing system.
Traditional metering pump nozzle comprises nozzle valve seat 10 and the nozzle spool 11 that is arranged in the nozzle valve seat 10, offer hydrojet import 12 and hydrojet outlet 13 on the described nozzle valve seat 10, one end connected electromagnetic valve parts 14 of described nozzle spool 11, described nozzle spool 11 and nozzle valve seat 10 are provided with place seat surface sealing at the hydrojet end, adopt " O " shape seal ring 15 to seal between nozzle spool 11 tops and the electromagnetic valve components 14, when the solenoid valve outage, nozzle spool 11 is under the effect of spring force, spool head seat surface and valve seat bottom seat surface are adjacent to sealing, and nozzle is hydrojet not; And when the solenoid valve energising, electromagnetic force overcomes spring force will be carried on the nozzle spool 11, and hydrojet is from hydrojet outlet 13 ejections; Solenoid valve cuts off the power supply again, repeats said process.
But the two places sealing of above-mentioned measuring jet is not too reliable, especially top " O " shape seal ring, because nozzle spool 11 is to move up and down, hydrojet always might enter the magnet chamber, and electromagnet can lose efficacy because of hydrojet corrosion, causes easily that whole system is leaked, the stifled and fault of hydrojet not.
The model utility content
The purpose of this utility model is to provide a kind of measuring jet two stage column surface seal structure, and it has, and cost is low, the characteristics of good sealing effect and reliable and stable work, to solve the problem that the single sealing configuration of measuring jet exists in the prior art.
For reaching this purpose, the utility model by the following technical solutions:
A kind of measuring jet two stage column surface seal structure, it comprises the nozzle valve body, the nozzle spool, the nozzle valve seat, hydrojet is advanced, outlet and electromagnetic valve components, offer holding cavity on the described nozzle valve body, described nozzle valve seat is arranged in the holding cavity, described nozzle spool is installed in the nozzle valve seat, the electromagnet of described nozzle spool connected electromagnetic valve parts, leading to of described electromagnetic valve components, outage drives the nozzle spool and moves up and down in the nozzle valve seat, wherein, correspondingly on described nozzle valve body and the nozzle valve seat offer the hydrojet import, offer the hydrojet outlet on the described nozzle valve seat, before described nozzle spool comprises, rear two sections, the diameter of the leading portion part of described nozzle spool is less than the back segment part, the back segment of described nozzle spool partly has one section annular groove, and under hydrojet state not, cylinder forms the cylinder sealing with the nozzle valve seat respectively before and after the annular groove, when electromagnetic valve components adhesive spool, annular groove is connected import and the outlet of hydrojet.
Especially, described nozzle spool top is provided with the elastic packing offset plate that the magnet chamber with holding cavity and electronic valve parts cuts off fully.
Especially, described nozzle valve seat and nozzle valve body are split-type structural, to make things convenient for the processing of nozzle couple.
Especially, described nozzle valve body is made by rustproof aluminum alloy.
Especially, described nozzle valve seat is made by stainless steel.
The beneficial effects of the utility model are that compared with prior art described measuring jet two stage column surface seal structure has the following advantages:
1) at the hydrojet end of nozzle valve seat, formerly be sealed into the sealing of single seat surface, for the hydrojet that pressure is arranged, this sealing configuration is insecure, increased the sealing of secondary cylinder after, significantly increased the reliability of sealing.
2) nozzle valve seat and nozzle valve body are split-type structural, have made things convenient for the processing of nozzle couple;
3) nozzle valve seat and nozzle valve body are split-type structural, and make both can adopt different materials, and the nozzle valve body adopts rustproof aluminum alloy, and the nozzle valve seat adopts stainless steel, has reduced to a certain extent cost of production.
Description of drawings
Fig. 1 is the structural representation of sealed nozzle state of the metering pump of traditional vehicle exhaust processing system;
Fig. 2 is the structural representation of nozzle hydrojet state of the metering pump of traditional vehicle exhaust processing system;
Fig. 3 is the sectional drawing of the measuring jet two stage column surface seal structure that provides of the utility model embodiment 1;
Fig. 4 is the schematic diagram of the sealing state of the measuring jet two stage column surface seal structure that provides of the utility model embodiment 1;
Fig. 5 is the schematic diagram of the hydrojet state of the measuring jet two stage column surface seal structure that provides of the utility model embodiment 1.
Embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment.
See also Fig. 3 to shown in Figure 5, in the present embodiment, a kind of measuring jet two stage column surface seal structure comprises nozzle valve body 20, nozzle spool 21, nozzle valve seat 22, hydrojet import 25, hydrojet outlet 26 and electromagnetic valve components 23, offer holding cavity on the described nozzle valve body 20, described nozzle valve seat 22 is arranged in the holding cavity, described nozzle spool 21 is installed in the nozzle valve seat 22, described nozzle valve seat 22 is split-type structural with nozzle valve body 20, not only made things convenient for the processing of nozzle couple, and make nozzle valve body 20 can adopt different materials with nozzle valve seat 22, nozzle valve body 20 adopts rustproof aluminum alloy to make, nozzle valve seat 22 adopts stainless steel to make, reduced to a certain extent cost of production, the electromagnet of the upper end connected electromagnetic valve parts 23 of described nozzle spool 21, described electromagnetic valve components 23 is led to, outage drives nozzle spool 21 and moves up and down in nozzle valve seat 22, and described nozzle spool 21 tops are provided with elastic packing offset plate 24.About sealing offset plate 24 flexible permission nozzle spools 21 freedom, magnet chamber and hydrojet chamber are cut off, hydrojet may not enter the magnet chamber, thereby guarantee the suction playing function of electromagnetic valve components 23, correspondingly on described nozzle valve body 21 and the nozzle valve seat 22 offer hydrojet import 25, offer hydrojet outlet 26 on the described nozzle valve seat 22.
Described nozzle spool 21 comprises forward and backward two sections, the diameter of the leading portion part of described nozzle spool 21 is less than the back segment part, the back segment of described nozzle spool 21 partly has one section annular groove 27, under hydrojet state not, annular groove 27 front and back cylinders form the cylinder sealing with nozzle valve seat 22 respectively, when electromagnetic valve components 23 adhesive nozzle spool 21, annular groove 27 is connected hydrojet import 25 and hydrojet outlet 26, i.e. nozzle operation.
The end of the leading portion part of described nozzle spool 21 is the inverted cone structure, and corresponding to conical bore seat surface 28 is set on the nozzle valve seat 22, described conical bore seat surface 28 is fitted into the seat surface sealing with the front end of nozzle spool 21.
During work, sealing state, electromagnetic valve components 23 outages, nozzle spool 21 is under the effect of spring force, the nozzle spool 21 head conical surfaces and nozzle valve seat 22 bottom seat surfaces are adjacent to sealing, and nozzle is hydrojet not, and this moment, hydrojet was enclosed in outside the two stage column surface seal structure of nozzle spool 21.
Hydrojet state, electromagnetic force overcome spring force will be carried on the nozzle spool 21, and the annular groove 27 of nozzle spool 21 is connected hydrojet import 25 and hydrojet outlet 26, and cylinder sealing and seat surface sealing all lose sealing effect, and hydrojet is from hydrojet outlet 26 ejections; Solenoid valve cuts off the power supply again, repeats said process.
Not only cost is low for above-mentioned measuring jet two stage column surface seal structure, and good sealing effect, reliable and stable work.
Above embodiment has just set forth basic principle of the present utility model and characteristic; the utility model is not limited by above-mentioned example; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various variations and change, and these variations and change all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. measuring jet two stage column surface seal structure, it comprises the nozzle valve body, the nozzle spool, the nozzle valve seat, hydrojet is advanced, outlet and electromagnetic valve components, offer holding cavity on the described nozzle valve body, described nozzle valve seat is arranged in the holding cavity, described nozzle spool is installed in the nozzle valve seat, the electromagnet of described nozzle spool connected electromagnetic valve parts, leading to of described electromagnetic valve components, outage drives the nozzle spool and moves up and down in the nozzle valve seat, it is characterized in that, correspondingly on described nozzle valve body and the nozzle valve seat offer the hydrojet import, offer the hydrojet outlet on the described nozzle valve seat, before described nozzle spool comprises, rear two sections, the diameter of the leading portion part of described nozzle spool is less than the back segment part, the back segment of described nozzle spool partly has one section annular groove, and under hydrojet state not, cylinder forms the cylinder sealing with the nozzle valve seat respectively before and after the annular groove, when electromagnetic valve components adhesive spool, annular groove is connected import and the outlet of hydrojet.
2. measuring jet two stage column surface seal structure according to claim 1 is characterized in that, described nozzle spool top is provided with the elastic packing offset plate that the magnet chamber with holding cavity and electronic valve parts cuts off fully.
3. measuring jet two stage column surface seal structure according to claim 1 is characterized in that, described nozzle valve seat and nozzle valve body are split-type structural.
4. measuring jet two stage column surface seal structure according to claim 1 is characterized in that, described nozzle valve body is made by rustproof aluminum alloy.
5. measuring jet two stage column surface seal structure according to claim 1 is characterized in that, described nozzle valve seat is made by stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220437975 CN202745970U (en) | 2012-08-30 | 2012-08-30 | Secondary cylindrical surface sealing structure for metering spray nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220437975 CN202745970U (en) | 2012-08-30 | 2012-08-30 | Secondary cylindrical surface sealing structure for metering spray nozzle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202745970U true CN202745970U (en) | 2013-02-20 |
Family
ID=47705382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220437975 Withdrawn - After Issue CN202745970U (en) | 2012-08-30 | 2012-08-30 | Secondary cylindrical surface sealing structure for metering spray nozzle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202745970U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817677A (en) * | 2012-08-30 | 2012-12-12 | 无锡市凯龙汽车设备制造有限公司 | Secondary cylindrical surface sealing structure of metering nozzle |
| CN110785589A (en) * | 2017-06-19 | 2020-02-11 | 罗伯特·博世有限公司 | Metering valve |
-
2012
- 2012-08-30 CN CN 201220437975 patent/CN202745970U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817677A (en) * | 2012-08-30 | 2012-12-12 | 无锡市凯龙汽车设备制造有限公司 | Secondary cylindrical surface sealing structure of metering nozzle |
| CN102817677B (en) * | 2012-08-30 | 2015-12-16 | 凯龙高科技股份有限公司 | A kind of measuring jet two stage column surface seal structure |
| CN110785589A (en) * | 2017-06-19 | 2020-02-11 | 罗伯特·博世有限公司 | Metering valve |
| CN110785589B (en) * | 2017-06-19 | 2022-03-04 | 罗伯特·博世有限公司 | Metering valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: KAILONG HIGH TECHNOLOGY CO., LTD. Free format text: FORMER NAME: KAILONG AUTOMOBILE EQUIPMENT MANUFACTURING CO., LTD., WUXI CITY |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 214000 Jiangsu city in Wuxi Province Economic Development Zone Huishan District Wuxi Tangqiao temple bridge supporting money Kailong Automobile Equipment Manufacturing Co Ltd Patentee after: Kailong High Technology Co., Ltd. Address before: 214000 Jiangsu city in Wuxi Province Economic Development Zone Huishan District Wuxi Tangqiao temple bridge supporting money Kailong Automobile Equipment Manufacturing Co Ltd Patentee before: Wuxi Kailong Bus Equipment Manufacturing Co., Ltd. |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130220 Effective date of abandoning: 20151216 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |