CN202382796U - Double layer filter screen structure of liquid level sensor - Google Patents
Double layer filter screen structure of liquid level sensor Download PDFInfo
- Publication number
- CN202382796U CN202382796U CN2011205415239U CN201120541523U CN202382796U CN 202382796 U CN202382796 U CN 202382796U CN 2011205415239 U CN2011205415239 U CN 2011205415239U CN 201120541523 U CN201120541523 U CN 201120541523U CN 202382796 U CN202382796 U CN 202382796U
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- filter screen
- frame body
- level sensor
- internal frame
- liquid level
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Abstract
The utility model discloses a double layer filter screen structure of a liquid level sensor, which comprises a frame body, a filter screen and a liquid sucking hole which are arranged on the frame body, wherein the filter screen includes an outer layer filter screen and an inner layer filter screen, a gap is maintained between the outer layer filter screen and the inner layer filter screen to form a filtering cavity, the liquid sucking hole is communicated with the filtering cavity, a liquid inlet cavity is defined by the inner layer filter screen, and the liquid inlet cavity is provided with a liquid inlet port. The gap is maintained between the outer layer filter screen and the inner layer filter screen to form the filtering cavity, and then a double layer filter screen structure is achieved, so that the liquid can directly be filtered by the outer layer filter screen and enters into the filtering cavity, and also the liquid can enter into the liquid inlet cavity through the liquid inlet port and then can be filtered by the inner layer filter screen and enters into the filtering cavity. Thereby, a filtering area of the filtering screen is increased, a filtering effect and a filtering speed for the liquid are effectively improved, and a blocking for an oil pipe or a urea pipe can be avoided, besides, when the liquid level sensor is installed on a urea box, a normal operation of semiconductor control rectifier (SCR) system can be guaranteed, and the air pollution caused by vehicle tail gas is reduced.
Description
Technical field
The utility model relates to the liquid level sensor art, refers in particular to a kind of double-layer leaching net structure of liquid level sensor.
Background technology
Diesel engine is used having obtained in the higher thermal efficiency and the lower every profession and trade of toxic emission all over the world widely, but its higher discharged nitrous oxides is puzzlement people's a problem always.Since the nineties in 20th century,, promoted the continuous development of engine technology along with the continuous strictness of countries in the world to fuel oil (gas) motor car engine Abgasgesetz.China came into effect state's III Abgasgesetz on July 1st, 2008, implemented state's IV Abgasgesetz on January 1st, 2010.In intense market competition, production firm has to emission standard engine improved or develops.At present; The technology path of realizing state's IV emission standard has SCR (the former processing of urea selective recall), EGR+DPF (exhaust gas recirculation+grain catcher), LNT (nitrogen oxygen adsorber), CRT (cyclic regeneration grain catcher) etc.; Wherein occupy an leading position with SCR catalytic reduction technology; Domestic large-scale diesel engine producer of a few family also big more options this technology path, it is to utilize emission controls by improving combustion to reduce soot, utilizes the SCR system to reduce the method for NOX discharging then.
The running of SCR system need cooperate and utilizes urea box and liquid level sensor, liquid level sensor to be installed on the urea box and through this liquid level sensor the urea liquid sucking-off in the urea box is transferred to the SCR system.In order to make the pure inclusion-free of urea liquid through the liquid level sensor sucking-off, guarantee the normal operation of SCR system, filter screen is installed on liquid level sensor usually, utilize this filter screen that contaminant filter is fallen after sucking-off again.
Yet; What existing liquid level sensor adopted all is the individual layer filter structure, and individual layer filter structure poor filtration effect and filter velocity are slow, cause stopping up oil pipe or urea pipe easily; After the urea pipe is blocked; Can make that the SCR system can't normal operation, cause the Vehicular exhaust contaminated air, influence environmental quality.
In addition, above-mentioned liquid level sensor can also be applied in the urea box in the fuel tank except being applied to, and when above-mentioned liquid level sensor was applied in the fuel tank, liquid level sensor can't carry out normal oil suction operation, thereby causes vehicle operating unstable.
The utility model content
In view of this, the utility model is to the disappearance of prior art existence, and its fundamental purpose provides a kind of double-layer leaching net structure of liquid level sensor, and it can effectively solve the strainer filtering weak effect of existing liquid level sensor, slow-footed problem.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
A kind of double-layer leaching net structure of liquid level sensor; Include chassis body and be arranged at filter screen and the imbibing hole on the chassis body; This filter screen includes outer filter and inner filter screen, maintains the gap between this outer filter and the inner filter screen and is formed with filter chamber, and this imbibing hole is communicated with this filter chamber; This inner filter screen encloses and constitutes an admission chamber, and this admission chamber has inlet.
As a kind of preferred version; Said chassis body includes outer framework and internal frame body, and aforementioned imbibing hole and outer filter all are arranged on the outer framework, and this outer framework is provided with containing cavity; This containing cavity has installing port, this installing port and aforementioned inlet towards identical; Aforementioned admission chamber and inner filter screen all are arranged on the internal frame body, and this internal frame body inserts in the containing cavity and with outer framework along installing port and is connected, and the mode through ultrasonic soldering between this internal frame body and the outer framework connects or detachably connects.
As a kind of preferred version, the installing port of said containing cavity is arranged at the bottom of outer framework, and this internal frame body inserts in this containing cavity from lower to upper, and the inlet of this admission chamber is arranged at the bottom of internal frame body.
As a kind of preferred version, said internal frame body is provided with pipette is played the role of positioning with the prevention portion that prevents that pipette from rocking.
As a kind of preferred version; Said outer filter is layed on the front and back sides of outer framework; Should outer framework include first top board, first base plate and connect first top board and first base plate between two first support columns, this first top board, first base plate and two first support columns all are connected with the outer filter integrated injection molding; And; All be provided with one first fixed strip between the leading flank of the leading flank of this first top board and first base plate and between the trailing flank of the trailing flank of first top board and first base plate at least, all be provided with one second fixed strip between the leading flank of these two first support columns and between the trailing flank of two first support columns at least.
As a kind of preferred version: said outer filter is located on outside the inner filter screen.
As a kind of preferred version; Said inner filter screen is layed on the front and back sides of internal frame body; This internal frame body include second top board, second base plate and connect second top board and second base plate between two second support columns, this second top board, second base plate and two second support columns all are connected with the inner filter screen integrated injection molding; And; All be provided with one the 3rd fixed strip between the leading flank of the leading flank of this second top board and second base plate and between the trailing flank of the trailing flank of second top board and second base plate at least, all be provided with one the 4th fixed strip between the leading flank of these two second support columns and between the trailing flank of two second support columns at least.
As a kind of preferred version, outwards protrude out on the said internal frame body to be useful on and withstand outer filter and make between outer filter and the inner filter screen and to keep gapped convex tendon.
As a kind of preferred version; Convex with reference column on the said internal frame body; This reference column is provided with the through hole that is communicated with aforementioned admission chamber, and this outer framework is provided with this reference column and cooperates plugging in the pilot hole of location, and outer framework is provided with the vent port that is communicated with filter chamber.
As a kind of preferred version, said filter screen is a nylon PA material.
The utility model compared with prior art has tangible advantage and beneficial effect, particularly, can be known by technique scheme:
One, maintains the gap between outer filter and the inner filter screen and be formed with filter chamber through utilizing, realize the structure of double-layer leaching net, replaced the individual layer filter structure of tradition; Make liquid both can directly see through outer filter and filter back entering filter chamber; Can get into admission chamber from inlet again, see through inner filter screen then and filter the entering filter chamber, thereby increase the filter area of filter screen; Effectively promote filter effect and filter velocity, and avoid stopping up oil pipe or urea pipe liquid; When liquid level sensor is installed on urea box, can guarantee the normal operation of SCR system, reduce the pollution of Vehicular exhaust to air, can not impact environmental quality; When liquid level sensor is installed on fuel tank, can guarantee that the oil suction operation normally carries out, make vehicle operating stable.
Two, this chassis body is through being made up of outer framework and internal frame body; Utilize this outer filter and inner filter screen respectively correspondence be arranged on outer framework and the internal frame body; And cooperate the containing cavity utilize internal frame body framework outside installing port inserts and connect, make product structure simple, assemble also very convenient.
Three, through internal frame body and outer framework are detachably connected; Make product in use for some time, can internal frame body be pulled down from outer framework, so that inner filter screen is thoroughly cleaned; The usability of product is maintained a good state, and can prolong the serviceable life of product.
Be architectural feature and the effect of more clearly setting forth the utility model, come the utility model is elaborated below in conjunction with accompanying drawing and specific embodiment.
Description of drawings
Fig. 1 is the assembling schematic perspective view of the preferred embodiment of the utility model;
Fig. 2 is the exploded view of the preferred embodiment of the utility model;
Fig. 3 is the view in transverse section of the preferred embodiment of the utility model;
Fig. 4 is the longitdinal cross-section diagram of the preferred embodiment of the utility model.
The accompanying drawing identifier declaration:
10, chassis body 11, outer framework
111, containing cavity 112, installing port
113, first top board 114, first base plate
115, first support column 116, first fixed strip
117, second fixed strip 118, fabrication hole
119, fixed teeth 110, vent port
12, internal frame body 121, second top board
122, second base plate 123, second support column
124, the 3rd fixed strip 125, the 4th fixed strip
126, convex tendon 127, through hole
128, prevention portion 101, imbibing hole
102, filter chamber 103, admission chamber
104, inlet 105, reference column
106, pilot hole 20, filter screen
21, outer filter 22, inner filter screen
30, O RunddichtringO 40, axle sleeve.
Embodiment
Please referring to figs. 1 through shown in Figure 4; It has demonstrated the concrete structure of the preferred embodiment of the utility model; Include chassis body 10 and be arranged at the filter screen 20 and imbibing hole 101 on this chassis body 10, this filter screen 20 includes outer filter 21 and inner filter screen 22, maintains the gap between this outer filter 21 and the inner filter screen 22 and is formed with filter chamber 102; This imbibing hole 101 is communicated with this filter chamber 102, the axle sleeve 40 that O RunddichtringO 30 is installed in the imbibing hole 101 and pushes down this O RunddichtringO 30; This inner filter screen 22 encloses and constitutes an admission chamber 103, and this admission chamber 103 has inlet 104.
In the present embodiment, this chassis body 10 includes outer framework 11 and internal frame body 12; Wherein
Aforementioned imbibing hole 101 all is arranged on the outer framework 11 with outer filter 21, and this outer framework 11 is provided with containing cavity 111, and this containing cavity 111 has an installing port 112; This installing port 112 towards with aforementioned inlet 104 towards identical; In the present embodiment, this installing port 112 is arranged at the bottom of outer framework 11, but is not limited to be arranged on the bottom of outer framework 11; Also can be other positions, not to exceed; This outer filter 21 is layed on the front and back sides of outer framework 11; And; Should outer framework 11 include first top board 113, first base plate 114 and connect first top board 113 and first base plate 114 between two first support columns 115, this first top board 113, first base plate 114 and two first support columns 115 all are connected with outer filter 21 integrated injection moldings; All be provided with one first fixed strip 116 between the leading flank of the leading flank of this first top board 113 and first base plate 114 and between the trailing flank of the trailing flank of first top board 113 and first base plate 114 at least; All be provided with one second fixed strip 117 between the leading flank of these two first support columns 115 and between the trailing flank of two first support columns 115 at least, cooperate and utilize this first fixed strip 116 and 117 crisscross connections of second fixed strip to make outer filter 21 be well secured on the outer framework 11; In addition; This first top board 113 and first base plate, 114 equal ovalizes; All be provided with a fabrication hole 118 on the front and back sides of the front and back sides of first top board 113 and first base plate 114 at least, this outer filter 21 exposes this fabrication hole 118, this fabrication hole 118 outer filter 21 with outside form in the process of framework 11 integrated injection moldings; Can locate outer filter 21 well through this fabrication hole 118, make outer filter 21 well with outer framework 11 injection mo(u)ldings; And wherein one first support column 115 is provided with at least two above odontoid fixed teeth 119, utilizes this fixed teeth 119 can bite outer filter 21 well; In addition, this outer framework 11 is provided with the vent port 110 that is communicated with aforementioned filter chamber 102, and this vent port 110 is used for the gas of filter chamber 102 is discharged, so that imbibition is smooth and easy.
Aforementioned admission chamber 103 all is arranged on the internal frame body 12 with inner filter screen 22; This internal frame body 12 inserts in the containing cavity 111 and with outer framework 11 along aforementioned installing port 112 and is connected, and in the present embodiment, the inlet 104 of this admission chamber 103 is arranged at the bottom of internal frame body 12; This internal frame body 12 inserts in this containing cavity 111 from lower to upper; Mode through ultrasonic soldering between this internal frame body 12 and the outer framework 11 connects, but be not limited to through the welding mode connect, they also can detachably connect through the mode of screw or other buckles; When they are removable when connecting, can easily internal frame body 12 be pulled down inner filter screen 22 is cleaned; This inner filter screen 22 is layed on the front and back sides of internal frame body 12; This internal frame body 12 include second top board 121, second base plate 122 and connect second top board 121 and second base plate 122 between two second support columns 123, this second top board 121, second base plate 122 and two second support columns 123 all are connected with inner filter screen 22 integrated injection moldings; All be provided with one the 3rd fixed strip 124 between the leading flank of the leading flank of this second top board 121 and second base plate 122 and between the trailing flank of the trailing flank of second top board 121 and second base plate 122 at least; All be provided with one the 4th fixed strip 125 between the leading flank of these two second support columns 123 and between the trailing flank of two second support columns 123 at least, cooperate and utilize the 3rd fixed strip 124 and 125 crisscross connections of the 4th fixed strip to make inner filter screen 22 be well secured on the internal frame body 12; In addition; Outwards protruded out convex tendon 126 on this internal frame body 12; A plurality of convex tendons 126 have all outwards been protruded out on aforementioned in the present embodiment the 3rd fixed strip 124 and the 4th fixed strip 125; These a plurality of convex tendons 126 are intervally arranged, and the quantity of convex tendon 126 is not limit, and utilize these many convex tendons 126 to withstand outer filter 21 and can make between outer filter 21 and the inner filter screen 22 and maintain the gap.
And aforementioned outer filter 21 preferably is located on outside the inner filter screen 22, with the filter area of further increase liquid, improves filter velocity; And for the ease of cleaning filter screen 20, this filter screen 20 adopts nylon PA material to process, so that the impurity that is bonded on the filter screen 20 falls down easily, can clean long service life repeatedly.
In addition; For being installed in the outer framework 11, do not swing internal frame body 12; Be provided with on this internal frame body 12 and convex with reference column 105, this reference column 105 is provided with the through hole 127 that is communicated with aforementioned admission chamber 103, and this through hole 127 is used for the gas of admission chamber 103 is discharged; So that liquid gets in the admission chamber 103 smoothly, the accelerating liquid filter velocity; Should outer framework 11 be provided with pilot hole 106, in the framework 11 time, this reference column 105 cooperates with pilot hole 106 slotting outside internal frame body 12 is installed on, make internal frame body 12 well location and installation in outer framework 11; In addition; This internal frame body 12 is provided with prevention portion 128; This prevention portion 128 is positioned on the side, bottom of internal frame body 12, and after the pipette (not shown) inserted from imbibing hole 101, the bottom of pipette was positioned in this prevention portion 128; To prevent that pipette from rocking in filter chamber 102, make that the installation of pipette is more stable.
The assembling process that present embodiment is detailed is following:
At first, outer filter 21 and inner filter screen 22 are put into corresponding mould respectively, make outer filter 21 and inner filter screen 22 respectively accordingly with outer framework 11 and internal frame body 12 integrated injection moldings; Then; Installing port 112 insertions of internal frame body 12 from outer framework 11 are installed on the containing cavity 11; When internal frame body 12 was in place, this reference column 105 was inserted the location with 106 pairs of pilot holes, and second base plate 122 of this internal frame body 12 is butted on first base plate 114 of outer framework 11; Then, mode or other modes through ultrasonic soldering connect first base plate 114 and second base plate 122, and assembled (as shown in Figure 4) is formed with filter chamber 102 between this inner filter screen 22 and the outer filter 21.
During use; This double-layer leaching net structure is soaked in the urea liquid of urea box; Urea liquid divides two-way to get in the filter chamber 102, and wherein one road urea liquid directly sees through outer filter 21 and filters back entering filter chamber 102, and another road urea liquid gets into the admission chamber 103 from inlet 104 earlier; And then through in the inner filter screen 22 filtration back entering filter chambers 102, the urea liquid process imbibing hole 101 that gets into filter chamber 102 is by sucking-off.
The design focal point of the utility model is: at first; Maintain the gap between outer filter and the inner filter screen and be formed with filter chamber through utilizing, realize the structure of double-layer leaching net, replaced the individual layer filter structure of tradition; Make liquid both can directly see through outer filter and filter back entering filter chamber; Can get into admission chamber from inlet again, see through inner filter screen then and filter the entering filter chamber, thereby increase the filter area of filter screen; Effectively promote filter effect and filter velocity, and avoid stopping up oil pipe or urea pipe liquid; When liquid level sensor is installed on urea box, can guarantee the normal operation of SCR system, reduce the pollution of Vehicular exhaust to air, can not impact environmental quality; When liquid level sensor is installed on fuel tank, can guarantee that the oil suction operation normally carries out, make vehicle operating stable.Secondly; This chassis body is through being made up of outer framework and internal frame body, utilize this outer filter and inner filter screen respectively correspondence be arranged on outer framework and the internal frame body, and cooperation utilizes the containing cavity of internal frame body framework outside the installing port insertion and connects; Make product structure simple, assemble also very convenient.Moreover, through internal frame body and outer framework are detachably connected, make product in use for some time; Can internal frame body be pulled down from outer framework; So that inner filter screen is thoroughly cleaned, the usability of product is maintained a good state, and can prolong the serviceable life of product.
The above; It only is the preferred embodiment of the utility model; Be not that the technical scope of the utility model is done any restriction; So every technical spirit according to the utility model all still belongs in the scope of the utility model technical scheme any trickle modification, equivalent variations and modification that above embodiment did.
Claims (10)
1. the double-layer leaching net structure of a liquid level sensor; Include chassis body and be arranged at filter screen and the imbibing hole on the chassis body; It is characterized in that: this filter screen includes outer filter and inner filter screen, maintains the gap between this outer filter and the inner filter screen and is formed with filter chamber, and this imbibing hole is communicated with this filter chamber; This inner filter screen encloses and constitutes an admission chamber, and this admission chamber has inlet.
2. the double-layer leaching net structure of liquid level sensor according to claim 1; It is characterized in that: said chassis body includes outer framework and internal frame body; Aforementioned imbibing hole and outer filter all are arranged on the outer framework; Should outer framework be provided with containing cavity, this containing cavity has installing port, this installing port and aforementioned inlet towards identical; Aforementioned admission chamber and inner filter screen all are arranged on the internal frame body, and this internal frame body inserts in the containing cavity and with outer framework along installing port and is connected, and the mode through ultrasonic soldering between this internal frame body and the outer framework connects or detachably connects.
3. the double-layer leaching net structure of liquid level sensor according to claim 2; It is characterized in that: the installing port of said containing cavity is arranged at the bottom of outer framework; This internal frame body inserts in this containing cavity from lower to upper, and the inlet of this admission chamber is arranged at the bottom of internal frame body.
4. the double-layer leaching net structure of liquid level sensor according to claim 2, it is characterized in that: said internal frame body is provided with pipette is played the role of positioning with the prevention portion that prevents that pipette from rocking.
5. the double-layer leaching net structure of liquid level sensor according to claim 2; It is characterized in that: said outer filter is layed on the front and back sides of outer framework; Should outer framework include first top board, first base plate and connect first top board and first base plate between two first support columns, this first top board, first base plate and two first support columns all are connected with the outer filter integrated injection molding; And; All be provided with one first fixed strip between the leading flank of the leading flank of this first top board and first base plate and between the trailing flank of the trailing flank of first top board and first base plate at least, all be provided with one second fixed strip between the leading flank of these two first support columns and between the trailing flank of two first support columns at least.
6. the double-layer leaching net structure of liquid level sensor according to claim 2, it is characterized in that: said outer filter is located on outside the inner filter screen.
7. the double-layer leaching net structure of liquid level sensor according to claim 2; It is characterized in that: said inner filter screen is layed on the front and back sides of internal frame body; This internal frame body include second top board, second base plate and connect second top board and second base plate between two second support columns, this second top board, second base plate and two second support columns all are connected with the inner filter screen integrated injection molding; And; All be provided with one the 3rd fixed strip between the leading flank of the leading flank of this second top board and second base plate and between the trailing flank of the trailing flank of second top board and second base plate at least, all be provided with one the 4th fixed strip between the leading flank of these two second support columns and between the trailing flank of two second support columns at least.
8. the double-layer leaching net structure of liquid level sensor according to claim 2 is characterized in that: outwards protrude out on the said internal frame body to be useful on and withstand outer filter and make and keep gapped convex tendon between outer filter and the inner filter screen.
9. the double-layer leaching net structure of liquid level sensor according to claim 2; It is characterized in that: convex with reference column on the said internal frame body; This reference column is provided with the through hole that is communicated with aforementioned admission chamber; This outer framework is provided with this reference column and cooperates plugging in the pilot hole of location, and outer framework is provided with the vent port that is communicated with filter chamber.
10. the double-layer leaching net structure of liquid level sensor according to claim 1, it is characterized in that: said filter screen is a nylon PA material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205415239U CN202382796U (en) | 2011-12-22 | 2011-12-22 | Double layer filter screen structure of liquid level sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205415239U CN202382796U (en) | 2011-12-22 | 2011-12-22 | Double layer filter screen structure of liquid level sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202382796U true CN202382796U (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205415239U Expired - Lifetime CN202382796U (en) | 2011-12-22 | 2011-12-22 | Double layer filter screen structure of liquid level sensor |
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| Country | Link |
|---|---|
| CN (1) | CN202382796U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113579232A (en) * | 2021-07-30 | 2021-11-02 | 上海理工大学 | Double-layer filter screen for nuclear power and integrated design and forming method thereof |
-
2011
- 2011-12-22 CN CN2011205415239U patent/CN202382796U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113579232A (en) * | 2021-07-30 | 2021-11-02 | 上海理工大学 | Double-layer filter screen for nuclear power and integrated design and forming method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120815 |