CN215352395U - Filter structure suitable for urea pump - Google Patents
Filter structure suitable for urea pump Download PDFInfo
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- CN215352395U CN215352395U CN202121873606.8U CN202121873606U CN215352395U CN 215352395 U CN215352395 U CN 215352395U CN 202121873606 U CN202121873606 U CN 202121873606U CN 215352395 U CN215352395 U CN 215352395U
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Abstract
The utility model provides a filter structure suitable for a urea pump, which comprises a bottom end cover, a central pipe, a top end cover and a plurality of layers of non-woven fabric filter elements, wherein the bottom end cover is provided with a plurality of layers of non-woven fabric filter elements; the bottom end cover is fixedly arranged at the bottom end of the multilayer non-woven fabric filter element, an accommodating space is formed in the multilayer non-woven fabric filter element, and the central tube is positioned in the accommodating space and is coaxially arranged with the multilayer non-woven fabric filter element; the central tube is hollow and is provided with a first hollow area, and the surface of the central tube is provided with a plurality of through holes; the top end cover is fixedly arranged at the top end of the multilayer non-woven fabric filter element and provided with a second hollow area, and the first hollow area is communicated with the second hollow area. The utility model adopts the multilayer non-woven fabrics as the filter element material, solves the problem that the filter is easy to crack and damage under the change of extreme cold and extreme heat temperature difference, and compared with the traditional paper filter, the multilayer non-woven fabrics filter element greatly improves the dust holding capacity of the filter.
Description
Technical Field
The utility model relates to the technical field of purification and filtration, in particular to a filter structure suitable for a urea pump.
Background
To meet emission standards, it is desirable to reduce engine nitride NO by SCR (Selective catalytic reduction) TechnologyXAnd (5) discharging. In the whole SCR tail gas treatment system, tail gas treatment liquid (commonly known as automobile urea, automobile urea and automobile environment-friendly urea in China) is a consumable product which is necessary to be used in the SCR technology. In the SCR system for exhaust gas treatment, a nozzle for atomizing and spraying the urea aqueous solution is required to be highly required, and thus a filter is required to be installed. However, in the using process, urea solution is accumulated in the non-woven fabric filter element of the filter, urine accumulated at low temperature can be frozen, and the integrity of the non-woven fabric filter element is easily damaged due to high-low temperature cyclic change.
Patent document CN 204380367U discloses a microporous metal nonwoven fabric filter element and a filter device. The microporous metal non-woven fabric filter element comprises an inner layer filter screen and an outer layer filter screen which are cylindrical structures; the inner-layer filter screen and the outer-layer filter screen are both formed by pressing metal powder; the particle size of the metal powder for the inner layer filter screen is different from that of the metal powder for the outer layer filter screen, and the aperture of the upper hole of the inner layer filter screen is different from that of the upper hole of the outer layer filter screen. The filtering device comprises the microporous metal non-woven fabric filter element. However, the metal filter element is used, so that the risk of brittle fracture of the filter material caused by high and low temperature cyclic change is difficult to avoid.
SUMMERY OF THE UTILITY MODEL
In view of the deficiencies in the prior art, it is an object of the present invention to provide a filter arrangement suitable for use in a urea pump.
The filter structure suitable for the urea pump comprises a bottom end cover, a central pipe, a top end cover and a plurality of layers of non-woven fabric filter elements, wherein the bottom end cover is provided with a plurality of filter holes;
the bottom end cover is fixedly arranged at the bottom end of the multilayer non-woven fabric filter element, an accommodating space is formed in the multilayer non-woven fabric filter element, and the central tube is positioned in the accommodating space and is coaxially arranged with the multilayer non-woven fabric filter element;
the central pipe is hollow and provided with a first hollow area, and the surface of the central pipe is provided with a plurality of through holes penetrating through the pipe wall;
the top end cover is fixedly arranged at the top end of the multilayer non-woven fabric filter element and provided with a second hollow area, and the first hollow area is communicated with the second hollow area.
Preferably, the open porosity of the central tube is 75% or more.
Preferably, the top end cap comprises a first connector and a second connector;
the first connector has a central opening;
the second connecting piece is hollow and provided with a third hollow area, and the central opening of the first connecting piece is communicated with the third hollow area; the second connecting piece is fixedly connected to the top end of the first connecting piece, and the central opening is coaxially arranged with the second connecting piece;
the inner wall of the second connecting piece is provided with a plurality of guide grooves which are circumferentially arranged along the axis of the second connecting piece, and the bottom ends of the guide grooves are connected with the edge of the central hole.
Preferably, the top end cap further comprises a bezel;
the opening size of bevel limit from bottom to top is crescent gradually, bevel limit is located the top of second connecting piece inner wall, the bottom of bevel limit with the top of guiding gutter is connected.
Preferably, the bottom end cover is welded at the bottom of the multi-layer non-woven fabric filter element.
Preferably, the top end cover is welded on the top of the multi-layer non-woven fabric filter element.
Preferably, the base pipe is made of a hard material.
Preferably, the multi-layer non-woven fabric filter element comprises a shaping layer, an ash containing layer, an efficiency layer, a first protective layer, a second protective layer and a supporting layer;
the shaping layer is a woven mesh made of nylon; the ash containing layer is a melt-blown non-woven fabric made of nylon; the efficiency layer is a melt-blown non-woven fabric made of nylon; the supporting layer, the first protective layer and the second protective layer are all spun-bonded non-woven fabrics made of reinforced nylon;
the shaping layer is used as the outer side, the second protective layer is used as the inner side, and fluid needing to be filtered sequentially passes through the shaping layer, the first protective layer, the ash containing layer, the supporting layer, the efficiency layer and the second protective layer.
Preferably, the device further comprises a first mounting position and a sealing ring;
the first mounting position is arranged on the outer wall of the second connecting piece; the first mounting position comprises a first edge, a groove structure and a second edge which are sequentially arranged from top to bottom;
the sealing ring is arranged on the groove structure; the sealing ring is used for sealing the filter structure and the interface of the pump.
Preferably, a plurality of structural reinforcements are also included; the structure reinforcing pieces are arranged on the outer wall of the second connecting piece and distributed along the circumferential direction of the second connecting piece, the bottom ends of the structure reinforcing pieces are connected with the first connecting piece, and the top ends of the structure reinforcing pieces are connected with the first installation position.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model adopts the multilayer non-woven fabrics as the filter element material, solves the problem that the filter is easy to crack and damage under the change of extreme cold and extreme heat temperature difference, and compared with the traditional paper filter, the multilayer composite non-woven fabrics filter element greatly improves the dust holding capacity of the filter.
2. The upper end cover is provided with the guide groove and the bevel edge, so that the problem of unstable liquid delivery of external equipment (such as a pump) is effectively solved.
3. The filter core is provided with the central tube for supporting the non-woven fabric filter core, and the design overcomes the defect that the non-woven fabric filter material is easy to deform.
Drawings
Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic illustration of an explosive structure according to the present invention;
FIG. 2 is a schematic top view of the tip cap of the present invention;
the figures show that:
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the utility model, but are not intended to limit the utility model in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the utility model. All falling within the scope of the present invention.
A filter structure suitable for a urea pump comprises a bottom end cover 1, a central pipe 3, a top end cover 4 and a multi-layer non-woven fabric filter element 2.
The multi-layer non-woven fabric filter element 2 contains non-woven fabric materials, but is not made of the non-woven fabric materials.
The bottom end cover 1 is tightly installed at the bottom end of the multilayer non-woven fabric filter element 2 and used as a sealing medium to prevent urea from passing through the bottom of the multilayer non-woven fabric filter element 2. In a preferred embodiment, the filter element bottom end cap 1 is connected with the multi-layer non-woven filter element 2 through an infrared welding process.
The multilayer non-woven fabric filter element 2 is internally provided with an accommodating space, and the central tube 3 is positioned in the accommodating space and is coaxially arranged with the multilayer non-woven fabric filter element 2; the center tube 3 is made for hard material, is used for supporting multilayer non-woven fabrics filter element 2 for non-woven fabrics filter element 2 can not take place because the pressure extrusion and the filter area loss that the deformation leads to.
The central tube 3 is hollow and has a first hollow area, and the surface of the central tube 3 is provided with a plurality of through holes penetrating through the tube wall. In a preferred embodiment, the central tube 3 has an opening ratio of more than 75%, so as to ensure that the urea solution does not have a significant increase in flow resistance due to insufficient channel space when passing through the central tube 3.
The top end cover 4 is tightly installed at the top end of the multi-layer non-woven fabric filter element 2, and in a preferred embodiment, the top end cover 4 is connected with the multi-layer non-woven fabric filter element 2 through an infrared welding process. The top end cap 4 has a second hollow region, and the first hollow region communicates with the second hollow region.
The top end cover 4 comprises a first connecting piece 6 and a second connecting piece 7; the first connecting piece 6 has a central opening; the second connecting piece 7 is hollow and is provided with a third hollow area, and the central opening of the first connecting piece 6 is communicated with the third hollow area; the second connecting piece 7 is fixedly connected to the top end of the first connecting piece 6, and the central opening is coaxially arranged with the second connecting piece 7; the inner wall of the second connecting piece 7 is provided with a plurality of guide grooves 8 which are circumferentially arranged along the axis of the second connecting piece 7, and the bottom ends of the guide grooves 8 are connected with the edge of the central hole. The bottom end of the diversion trench 8 is connected with the edge of the central opening hole. In a preferred embodiment, the number of the flow guide grooves 8 is 8.
The top end cap 4 further comprises a bezel edge 9; the bevel edge 9 is of a truncated cone-shaped structure with the opening size gradually increasing from the bottom end to the top end, the bevel edge 9 is located at the top end of the inner wall of the second connecting piece 7, and the bottom end of the bevel edge 9 is connected with the top end of the diversion trench 8. The bottom end of the bevel edge 9 is connected with the top end of the diversion trench 8.
The non-woven fabric filter element 2 is used as a filter medium of the whole filter to filter the urea solution. The non-woven fabric filter element 2 comprises a shaping layer, an ash containing layer, an efficiency layer, a first protective layer, a second protective layer and a supporting layer; the shaping layer is a woven mesh made of nylon materials, and the aperture is between 400 and 800 microns; the ash containing layer is a melt-blown non-woven fabric made of nylon, the filament diameter is 12-15 microns, and the filtering efficiency of particles with the diameter of 70 microns is over 95 percent; the efficiency layer is a melt-blown non-woven fabric made of nylon, the filament diameter is about 10-12 microns, and the filtering efficiency of particles of 30 microns is over 95 percent; the supporting layer, the first protective layer and the second protective layer are all spun-bonded non-woven fabrics made of reinforced nylon; the design layer is as the outside, and the second protective layer is as the inboard, and the fluid that needs to filter loops through design layer, first protective layer, holds the ash layer, supporting layer, efficiency layer, second protective layer. In a preferred embodiment, the shaping layer, the ash containing layer, the efficiency layer, the first protection layer, the second protection layer and the support layer are all single layers, and in another preferred embodiment, the number of layers of one or more of the shaping layer, the ash containing layer, the efficiency layer, the first protection layer, the second protection layer or the support layer is more than one. Because the non-woven fabrics filter element 2 uses the structure of multilayer non-woven fabrics, can guarantee that the filter can not because the extreme cold extremely hot or frequently switch over in the extreme cold extremely hot environment of service temperature and lead to the brittle failure and the performance reduction of filter media.
The filter structure suitable for the urea pump further comprises a first mounting position and a sealing ring 5;
the first mounting position is arranged on the outer wall of the second connecting piece 7; the first mounting position comprises a first edge 12, a groove structure 10 and a second edge 13 which are sequentially arranged from top to bottom;
the sealing ring 5 is mounted on the groove structure 10, and the first edge 12 and the second edge 13 can be used for positioning the sealing ring 5 and limiting the up-and-down movement of the sealing ring 5. The sealing ring 5 is used to seal the filter arrangement to the pump interface. In a preferred embodiment, the second connecting element 7 is integrally connected to said second rim 13.
The filter structure suitable for the urea pump further comprises a structure strengthening piece 11; the structure strengthening part 11 is arranged on the outer wall of the second connecting part 7, the bottom end of the structure strengthening part 11 is connected with the first connecting part 6, and the top end of the structure strengthening part is connected with the second edge 13 in the first installation position.
The working principle of the utility model is as follows:
during the use, top end cap 4 in the filter structure that will be applicable to the urea pump links to each other with the urea pump, the filter structure soaks in urea solution and works as well, under the effect of urea pump, and urea is followed the filter structure outside is drawn into inside the filter structure, through the hollow region of top end cap 4 after the filtration of non-woven fabrics filter core 2 carry to the urea pump, provide clean urea solution for the urea pump.
Urea pump with filter structural connection back, because the effect of pump, urea follow the filter structure outside is drawn into, filters through multilayer non-woven fabrics filter core 2 earlier, and a plurality of through-holes on the rethread center tube 3 flow in the first hollow area that center tube 3 has flows from top end cover 4 at last the filter structure provides clear urea solution for the urea pump.
The flow guide groove 8 designed by the utility model can prevent the deviation of the liquid flow direction caused by the influence of the random acting force of the urea pump when the urea is pumped by the urea pump, and can also play a certain structural supporting role on the lip. In addition, the design of the bevel edge 9 enables the urea solution after being guided by the guide groove 8 to be evenly and stably conveyed to the urea pump when leaving the filter structure, and the urea solution cannot be divided into a plurality of sections by the guide groove, so that the conveying capacity of the urea solution can be effectively improved.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the utility model. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A filter structure suitable for a urea pump is characterized by comprising a bottom end cover (1), a central pipe (3), a top end cover (4) and a multi-layer non-woven fabric filter element (2);
the bottom end cover (1) is fixedly arranged at the bottom end of the multilayer non-woven fabric filter element (2), an accommodating space is arranged in the multilayer non-woven fabric filter element (2), and the central tube (3) is positioned in the accommodating space and is coaxially arranged with the multilayer non-woven fabric filter element (2);
the central tube (3) is hollow and is provided with a first hollow area, and the surface of the central tube (3) is provided with a plurality of through holes penetrating through the tube wall;
the top end cover (4) is fixedly arranged at the top end of the multilayer non-woven fabric filter element (2), the top end cover (4) is provided with a second hollow area, and the first hollow area is communicated with the second hollow area.
2. Filter construction suitable for use in a urea pump according to claim 1, characterised in that the central tube (3) has an opening degree of more than 75%.
3. A filter construction for a urea pump according to claim 1, characterised in that the top end cap (4) comprises a first connector (6) and a second connector (7);
the first connecting piece (6) is provided with a central opening;
the second connecting piece (7) is hollow and provided with a third hollow area, and the central opening of the first connecting piece (6) is communicated with the third hollow area; the second connecting piece (7) is fixedly connected to the top end of the first connecting piece (6), and the central opening is coaxially arranged with the second connecting piece (7);
the inner wall of the second connecting piece (7) is provided with a plurality of guide grooves (8) which are circumferentially arranged along the axis of the second connecting piece (7), and the bottom ends of the guide grooves (8) are connected with the edge of the central hole.
4. A filter construction for a urea pump according to claim 3, characterised in that the top end cap (4) further comprises a bevelled mouth edge (9);
the opening size of bevel edge (9) from the bottom to the top end becomes bigger gradually, bevel edge (9) is located the top of second connecting piece (7) inner wall, the bottom of bevel edge (9) with the top of guiding gutter (8) is connected.
5. Filter construction for a urea pump according to claim 1, characterised in that the bottom end cap (1) is welded to the bottom of the multilayer non-woven filter element (2).
6. Filter construction for a urea pump according to claim 1, characterised in that the top end cap (4) is welded on top of the multi-layer non-woven filter element (2).
7. Filter construction for a urea pump according to claim 1, characterised in that the central tube (3) is made of a hard material.
8. The filter structure suitable for a urea pump according to claim 1, characterized in that said multilayer non-woven filter element (2) comprises a sizing layer, an ash-containing layer, an efficiency layer, a first protective layer, a second protective layer and a support layer;
the shaping layer is a woven mesh made of nylon; the ash containing layer is a melt-blown non-woven fabric made of nylon; the efficiency layer is a melt-blown non-woven fabric made of nylon; the supporting layer, the first protective layer and the second protective layer are all spun-bonded non-woven fabrics made of reinforced nylon;
the design layer is as the outside, and the second protective layer is as the inboard, and the fluid that needs to filter loops through design layer, first protective layer, holds grey layer, supporting layer, efficiency layer, second protective layer.
9. Filter construction for a urea pump according to claim 3, characterized in that it further comprises a first mounting location and a sealing ring (5);
the first mounting position is arranged on the outer wall of the second connecting piece (7); the first mounting position comprises a first edge (12), a groove structure (10) and a second edge (13) which are sequentially arranged from top to bottom;
the sealing ring (5) is arranged on the groove structure (10); the sealing ring (5) is used for sealing the filter structure and the interface of the pump.
10. A filter construction suitable for a urea pump according to claim 9, characterised in that it further comprises a plurality of structural stiffeners (11); the structure reinforcing pieces (11) are arranged on the outer wall of the second connecting piece (7) and are distributed along the circumferential direction of the second connecting piece (7), the bottom ends of the structure reinforcing pieces (11) are connected with the first connecting piece (6), and the top ends of the structure reinforcing pieces are connected with the first installation position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121873606.8U CN215352395U (en) | 2021-08-11 | 2021-08-11 | Filter structure suitable for urea pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121873606.8U CN215352395U (en) | 2021-08-11 | 2021-08-11 | Filter structure suitable for urea pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215352395U true CN215352395U (en) | 2021-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121873606.8U Active CN215352395U (en) | 2021-08-11 | 2021-08-11 | Filter structure suitable for urea pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215352395U (en) |
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2021
- 2021-08-11 CN CN202121873606.8U patent/CN215352395U/en active Active
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