CN210206002U

CN210206002U - Automobile-used urea filter core assembly

Info

Publication number: CN210206002U
Application number: CN201920996564.3U
Authority: CN
Inventors: Jinping Lao; 劳金平; Hongzhi Zhu; 朱宏志; Lixin Cao; 曹立新; Yingying Mu; 穆盈盈
Original assignee: Wuxi Yili Environmental Protection Technology Co Ltd
Current assignee: Wuxi Yili Environmental Protection Technology Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-03-31
Anticipated expiration: 2029-06-28

Abstract

The utility model discloses a vehicle urea filter element assembly, wherein a filter layer is sleeved on the periphery of a cylindrical part to form a filter element, the upper end and the lower end of the cylindrical part are respectively provided with an upper cover and a lower cover, the lower part of the upper cover extends into the inner cavity of the cylindrical part, the outer part of the upper cover is fixed with a gland, the gland and the center of the upper cover are provided with through holes, the central through hole of the upper cover is internally provided with a sealing device combined by a check ring and a sealing ring, the bottom of the cylindrical part is provided with a radial fixing device, after a liquid outlet pipe, the upper part realizes circumferential sealing by a sealing device, the lower part realizes radial limiting by a fixing device, the lower end part of the liquid outlet pipe is prevented from vibrating and generating a gap between the liquid outlet pipe and a corresponding sealing matching part on the filter, so that the sealing is ineffective, and the leakage of unfiltered urea liquid is caused, and the urea enters the urea injection system from the liquid outlet pipe to reach the nozzle for spraying, so that the urea nozzle is abraded or blocked, and the function of the urea injection system is disabled.

Description

Automobile-used urea filter core assembly

Technical Field

The utility model belongs to the technical field of tail gas aftertreatment equipment technique and specifically relates to an automobile-used urea filter core assembly.

Background

With the increasing preservation quantity of motor vehicles, the pollution of the tail gas emission of the motor vehicles to the atmospheric environment is increasingly serious. Main emissions of diesel engines, inhalable Particulate Matter (PM) and Nitrogen Oxides (NO)_X) Is one of the main pollution sources causing air pollution, and in order to reduce the emission of pollutants and enable the exhaust emission to meet the requirements of national emission standards IV and V, the exhaust emission of diesel engines needs to be treated. At present, a diesel engine usually adopts a Selective Catalytic Reduction (SCR) technology to carry out aftertreatment on exhaust emission, a urea tank is arranged in an exhaust pipe, urea in the urea tank is used as a reducing agent and is sprayed into the exhaust pipe through a nozzle, and Nitrogen Oxide (NO) in the exhaust gas_X) Generating harmless nitrogen (N) under the action of catalyst₂) And water (H)₂O), and finally discharged from the exhaust pipe, thereby achieving the purposes of energy conservation and emission reduction. The urea filter is located the urea jar, and the urea filter is arranged in getting rid of the granule impurity in the urea solution, provides clear urea solution for the aftertreatment urea injection system, avoids granule impurity wearing and tearing urea pump, urea nozzle or jam pipeline in the urea, leads to urea injection system function failure.

The chinese utility model 201620943803.5 discloses a gradient filtration type urea filter, wherein the upper and lower ends of a ring-shaped filter element are respectively fixed with an upper end cover and a lower end cover by welding, and an internal cavity is formed among the filter element, the lower end cover and the upper end cover; the upper end cover is provided with a sealing sleeve in an interference clamping mode, and the sealing sleeve realizes sealing of the internal cavity; the drain pipe is inserted into the middle hole of the sealing sleeve, an interference sealing connection mode is adopted between the sealing sleeve and the drain pipe, and the clamping hoop is sleeved on the outer peripheral surface of the sealing sleeve to clamp the sealing sleeve on the outer peripheral surface of the drain pipe. The upper end cover of the urea filter is clamped in a corresponding groove of a sealing sleeve and is sealed by interference fit with the sealing sleeve, the sealing sleeve is generally a flexible rubber piece, and after a clamp is sleeved on the outer peripheral surface of the sealing sleeve for clamping, the sealing sleeve is easy to deform, so that a gap is formed at the matching position of the groove of the sealing sleeve and the upper end cover; in addition, the filter element of the urea filter is of a circular ring structure, a through hole is formed in the filter element, the filter element is fixed with the upper end cover and the lower end cover through welding, and the welding surfaces of the filter element, the upper end cover and the lower end cover are not close enough, so that gaps are easy to exist. In the urea jar, the inside cavity that gets into the urea filter can be followed the seepage in the gap between seal cover and the upper end cap, between filter core and the lower end cap to get into urea injection system from the drain pipe and spout from the nozzle, the granule impurity that is not filtered in the urea liquid can wear and tear or block up the urea nozzle, and then leads to urea injection system to damage.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defects that gaps exist between a sealing sleeve and an upper end cover and between a filter element and the upper end cover and between the filter element and the lower end cover of the existing urea filter, and unfiltered urea liquid can leak from the gaps and enter the filter, so that a urea nozzle is abraded or blocked, and the function of a urea injection system fails, and the like.

The utility model discloses the technical scheme who adopts as follows:

the utility model provides a vehicle urea filter core assembly, the filter bed forms the filter core is established to the periphery cover of drum spare, the lower extreme is the upper cover respectively on the drum spare, the lower cover, the inside cavity of drum spare is stretched into to the upper cover lower part, the upper cover external fixation has the gland, the through-hole has been seted up in the central authorities of upper cover, be provided with the retaining ring in the central through-hole of upper cover, the sealing device of sealing washer combination, the bottom of drum spare is equipped with radial fixing device, the drain pipe inserts the back, upper portion relies on sealing device to realize circumferential seal, the lower part relies on fixing device to realize radially spacing.

The utility model discloses an upper cover lower part stretches into the inside of drum spare, the upper cover external fixation has the gland, the through-hole has been seted up to the central authorities of upper cover, be provided with the retaining ring in the central through-hole of upper cover, the sealing device of sealing washer combination, the bottom of drum spare is equipped with radial fixing device, the drain pipe inserts the back, upper portion relies on sealing device to realize the circumference between drain pipe and the upper cover sealed, the lower part relies on fixing device to realize radially spacingly, prevent that the lower tip of drain pipe from vibrating and appearing the gap between corresponding sealed cooperation portion on drain pipe and filter, make sealed inefficacy, lead to unfiltered urea liquid to reveal, and get into urea injection system from the drain pipe and reachd the nozzle blowout, with urea nozzle wearing and tearing or jam, and lead to urea injection system functional failure.

As a further improvement of the above technical solution:

fixing device is a plurality of bellied perpendicular muscle in cylinder spare bottom, and it has the bellying to erect muscle upper end, and the internal surface of bellying cooperatees with the surface of drain pipe, realizes the radial spacing of drain pipe, has the clearance between the adjacent perpendicular muscle.

The utility model discloses a erect the muscle arch on the bottom surface of drum spare, erect the muscle upper end and have the bellying, the internal surface of bellying cooperatees with the surface of drain pipe, carries out radially spacingly to the drain pipe, erects the annular space between the outer peripheral face of muscle non-bellied lower part periphery and drain pipe and forms the circulation space of liquid.

The sealing device is formed by sleeving a plurality of sealing rings and check rings above a first step surface in the upper cover at intervals from bottom to top in sequence, so that circumferential sealing of the liquid outlet pipe is realized.

The cylinder piece is a cylinder with an open top surface and a closed bottom surface, and the bottom surface and the lower cover form an integral structure through welding.

The utility model discloses a drum spare is top surface opening, bottom surface confined drum, and the confined bottom surface makes the inside cavity and the lower cover of drum spare keep apart, has avoided unfiltered urea liquid to get into the cavity from the gap seepage between lower cover and the drum spare, and then influences urea injection system's injection function.

The circumference of the cylinder piece is radially provided with a plurality of through square cambered through holes, and the through holes of the square cambered surfaces are provided with filter screens.

The outer peripheral surface of the clamping part of the gland is provided with a plurality of ring grooves.

The clamping part is provided with a plurality of open slots along the radial direction, and the open slots penetrate through the inner through hole and the peripheral surface of the clamping part.

The utility model discloses a plurality of opening annuluses have been seted up on the outer peripheral face of the clamping part of gland, form thick, thin alternate periphery on the clamping part, when guaranteeing that the clamping part periphery has sufficient intensity, rigidity, avoid the clamping part again because the wall thickness is too thick shrink mark when the shaping, make the inside through-hole periphery unevenness of clamping part, the surface accuracy of through-hole periphery has been reduced, and then the laminating compactness of influence through-hole periphery and drain pipe outer peripheral face, reduce the reliability of connecting. A plurality of open grooves are formed in the clamping portion along the radial direction, when the clamping portion is clamped tightly by the clamping hoop, the open grooves can provide certain elastic deformation, the inner peripheral surface of the through hole of the clamping portion is attached to the outer peripheral surface of the liquid outlet pipe more tightly, friction between the clamping portion and the liquid outlet pipe can be improved, and the liquid outlet pipe is prevented from loosening.

A circle of convex ring is arranged in the cover-shaped part of the gland in a protruding mode, and a gap is reserved between the convex ring and the upper boss.

The utility model discloses an inside boss arch of orientation of gland has the round bulge loop, and the bulge loop can make the flash that produces among the friction welding process be unlikely to flow in its upper cover corresponds downthehole to influence sealed effect.

The cover-shaped part of the gland is fixed with the upper cover by friction welding.

The filter element is fixed with the upper cover and the lower cover by welding through a double-sided hot plate.

The utility model discloses an adopt friction welding between gland and the upper cover, the interference part of gland and upper cover melts the back through high-speed rotatory friction themogenesis and welds together, and the welding force is strong, and welding interface intensity is high, and the reliability is high, has guaranteed firmly between gland and the upper cover, and the upper cover breaks away from with the gland after avoiding the solder joint to split, causes the sealed inefficacy of sealing washer and drain pipe and the seepage, and then influences urea injection system's injection function. Adopt two-sided hot plate welding between filter core and upper cover, the lower cover, the face of weld that corresponds the welding piece heats and melts the back and welds together, and welding strength is high, and the face of weld laminating is inseparable seamless, has guaranteed the leakproofness between filter core and upper cover, the lower cover, avoids because the gap appears and causes the seepage, and then influences urea injection system's injection function.

The utility model has the advantages as follows:

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is an enlarged view of a portion B in fig. 2.

Fig. 5 is a perspective view of the cylinder.

In the figure: 1. a lower cover; 2. a filtering layer; 3. a cylindrical member; 4. an upper cover; 5. a gland; 6. a liquid outlet pipe; 7. a clamping portion; 8. a cap-shaped portion; 9. a retainer ring; 10. a seal ring; 11. an inner plane; 12. erecting ribs; 13. a boss portion; 14. a ring groove; 15. an open slot; 16. a cavity; 17. a first step surface; 18. a lower boss; 19. an upper boss; 20. a gap; 21. a convex ring.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1 and 2, the cylindrical filter layer 2 of the present invention is sleeved on the periphery of the cylindrical member 3 to form a filter element, and the top surface and the bottom surface of the filter element are respectively welded with a circular upper cover 4 and a circular lower cover 1; as shown in fig. 2, the upper and lower surfaces of the upper cover 4 are respectively protruded with a cylindrical upper boss 19 and a cylindrical lower boss 18, and the gland 5 is welded and fixed outside the upper boss 19; the gland 5 is sequentially provided with a cylindrical clamping part 7 and a cover-shaped cover part 8 from top to bottom, a circle of convex ring 21 protrudes towards the upper boss 19 in the cover part 8, a gap is reserved between the convex ring 21 and the upper boss 19, and the convex ring 21 and the upper boss 19 form a labyrinth structure, so that flash generated in the friction welding process can not flow into a hole corresponding to the upper cover 4, and the sealing effect is influenced; the bottom surface of the cover-shaped part 8 and the upper surface of the upper cover 4 are in friction welding, the interference part of the gland 5 and the upper cover 4 is welded together after being melted by high-speed rotating friction heat generation, the welding force is strong, the welding interface strength is high, the reliability is high, the firmness between the gland 5 and the upper cover 4 is ensured, and the upper cover 4 is prevented from being separated from the gland 5 after welding spots are cracked, so that the sealing failure of the sealing ring 10 and the liquid outlet pipe 6 is avoided, and the urea directly enters the cylinder part 3 without being filtered. Can adopt two-sided hot plate welding between filter core and upper cover 4, the lower cover 1, the face of weld that corresponds the welding piece heats and melts the back and welds together, and welding strength is high, and the face of weld laminating is inseparable seamless, has guaranteed the leakproofness between filter core and upper cover 4, the lower cover 1, avoids because appearing the gap and causing the urea directly to get into inside the drum spare 3 not filtered.

As shown in fig. 2, the liquid outlet pipe 6 is a circular pipe, and after one end of the liquid outlet pipe is inserted into the cylindrical member 3 from the gland 5, the retainer ring 9, the seal ring 10 and the upper cover 4, a plurality of opening ring grooves 14 are formed on the outer circumferential surface of the clamping portion 7 of the gland 5, in this example, three ring grooves 14 are formed, so that a circumferential surface with thick and thin intervals is formed on the clamping portion 7, and while ensuring that the circumferential surface of the clamping portion 7 has sufficient strength and rigidity, the clamping portion 7 is prevented from being shrunk due to the excessive thickness of the wall when being formed, the circumferential surface of the through hole in the clamping portion 7 is not flat, the surface precision of the circumferential surface of the through hole is reduced, the fit tightness between the circumferential surface of the through hole and the outer circumferential surface of the liquid outlet pipe 6 is further affected, the friction force between. A clamping hoop (not shown) is sleeved at the position of the opening ring groove 14 of the clamping part 7, and the clamping hoop clamps the gland 5 to be attached to the outer peripheral surface of the liquid outlet pipe 6, so that the gland 5 and the liquid outlet pipe 6 are fixed. As shown in fig. 1, the clamping portion 7 is provided with a plurality of open slots 15 along the radial direction, in this example, four open slots 15 are provided, the open slots 15 penetrate through the inner through hole and the outer peripheral surface of the clamping portion 7, when the clamping portion 7 is clamped by the clamp, the open slots 15 can provide certain elastic deformation, so that the inner peripheral surface of the through hole of the clamping portion 7 is more tightly attached to the outer peripheral surface of the liquid outlet pipe 6, the friction force between the clamping portion 7 and the liquid outlet pipe 6 can be improved, and loosening is avoided.

As shown in fig. 1 and 2, the through hole in the center of the upper cover 4 is a step through hole, a first step surface 17 is formed in the through hole, as shown in fig. 4, a plurality of sealing rings 10 and retaining rings 9 are sequentially sleeved on the periphery of the liquid outlet pipe 6 above the first step surface 17 at intervals from bottom to top, in this embodiment, two sealing rings 10 and two retaining rings 9 are arranged at intervals, and the sealing rings 10 are used for circumferential sealing of the peripheral surface of the liquid outlet pipe 6 to prevent urea leaked from the gland 5 from entering the cylindrical member 3; the retainer ring 9 is used for axially limiting the sealing ring 10.

As shown in fig. 2 and 5, the cylinder member 3 is a cylindrical cylinder with an open top surface and a closed bottom surface, a plurality of through square arc through holes are radially formed in the circumferential surface of the cylinder to form a urea solution inflow channel, a filter screen is arranged at the through holes of the square arc, the square arc through holes and the filter screen are integrated through an injection molding process, fibers falling off from the inner surface of the filter layer 2 can be effectively intercepted, a cylindrical cavity 16 is formed inside the cylinder, a lower boss 18 of the upper cover 4 extends into and is positioned inside the cavity 16, and the closed bottom surface isolates the inner cavity 16 from the lower cover 1, so that unfiltered urea solution is prevented from leaking into the cavity 16 from gaps between the lower cover 1 and the bottom of the cylinder member 3 and between the bottom of the filter layer 2, entering a urea injection system from the liquid outlet pipe 6 and being injected from a nozzle, and further wearing or blocking. As shown in fig. 3 and 5, a plurality of vertical ribs 12 are protruded upwards from an inner plane 11 of the bottom surface of the cylindrical part 3, the vertical ribs 12 and the cylindrical part 3 are integrally formed by injection molding, the vertical ribs 12 are circumferentially arranged, a gap 20 is formed between every two adjacent vertical ribs 12, a protruding part 13 is protruded from the upper end of each vertical rib 12 towards the cylindrical circle center, the inner peripheral surface of each protruding part 13 is matched with the outer cylindrical surface of the liquid outlet pipe 6 to limit the liquid outlet pipe 6 in the radial direction, so that the lower end part of the liquid outlet pipe 6 is prevented from vibrating, gaps are formed between the liquid outlet pipe 6 and the corresponding sealing matching part above the urea filter element, and sealing is disabled; as shown in FIG. 3, the annular gap between the lower circumferential surface of the non-protruding vertical rib 12 and the outer circumferential surface of the liquid outlet pipe 6 forms a liquid flow space.

The utility model discloses during the in-service use, drain pipe 6 is the pipe, and its one end inserts the inside of drum spare 3 from gland 5, retaining ring 9, sealing washer 10 and upper cover 4, and the clamp of 7 peripheries of clamping part through gland 5 presss from both sides tightly fixedly. Will the utility model discloses fix the back on corresponding fixing base, put into the urea intraductal, the urea liquid in the urea pipe gets into the inside cavity 16 of drum spare 3 after the filtration of filter core, then flows into drain pipe 6 from the lower port of drain pipe 6 in, carries to urea injection system, from urea spout blowout at last, handles motor vehicle tail gas. Because the bottom surface and the ring-shaped wall surface of the cylindrical part 3 are of an integral structure, the cavity 16 is isolated from the lower cover 1 by the closed bottom surface through integral injection molding, so that the problem that unfiltered urea liquid leaks into the cavity 16 from gaps between the lower cover 1 and the bottom of the cylindrical part 3 and between the lower cover and the bottom of the filtering layer 2, enters the urea injection system from the liquid outlet pipe 6 and is sprayed out from the urea injection system, the urea injection nozzle is abraded or blocked, and the function of the urea injection system is disabled is avoided.

The above description is illustrative of the present invention and is not intended to limit the present invention, and the present invention may be modified in any manner without departing from the spirit of the present invention. For example, the liquid outlet pipe 6 may also be a tapered pipe, the vertical ribs 12 may be arranged correspondingly according to the shape of the liquid outlet pipe 6, and the inner surface of the protruding portion 13 on the vertical ribs 12 is matched with the outer surface of the liquid outlet pipe 6 to limit the liquid outlet pipe 6.

Claims

1. The utility model provides a filter layer (2) formation filter core is established to the periphery cover of cylinder spare (3), and cylinder spare (3) upper and lower end is upper cover (4), lower cover (1) respectively, its characterized in that: the inner cavity (16) of the cylindrical part (3) is stretched into the lower portion of the upper cover (4), a gland (5) is fixed to the outer portion of the upper cover (4), a through hole is formed in the center of the gland (5) and the center of the upper cover (4), a check ring (9) and a sealing device combined with a sealing ring (10) are arranged in the through hole in the center of the upper cover (4), a radial fixing device is arranged at the bottom of the cylindrical part (3), after the liquid outlet pipe (6) is inserted, circumferential sealing is achieved by the aid of the sealing device on the upper portion, and radial limiting is achieved by the aid of the.

2. A urea filter cartridge assembly for a vehicle as defined in claim 1, further comprising: fixing device is bellied a plurality of perpendicular muscle (12) in cylinder spare (3) bottom, and it has bellying (13) to erect muscle (12) upper end, and the internal surface of bellying (13) cooperatees with the surface of drain pipe (6), realizes the radial spacing of drain pipe (6), has clearance (20) between the adjacent perpendicular muscle (12).

3. A urea filter cartridge assembly for a vehicle as defined in claim 1, further comprising: the sealing device is formed by sleeving a plurality of sealing rings (10) and check rings (9) at intervals in sequence from bottom to top above a first step surface (17) in the upper cover (4), so that circumferential sealing of the liquid outlet pipe (6) is realized.

4. A urea filter cartridge assembly for a vehicle as defined in claim 1, further comprising: the cylinder piece (3) is a cylinder with an open top surface and a closed bottom surface, and the bottom surface and the lower cover (1) form an integral structure through welding.

5. A urea filter cartridge assembly for a vehicle as defined in claim 1, further comprising: the circumference of the cylinder piece (3) is provided with a plurality of through square cambered through holes along the radial direction, and the through holes of the square cambered surfaces are provided with filter screens.

6. A urea filter cartridge assembly for a vehicle as defined in claim 1, further comprising: the outer circumferential surface of the clamping part (7) of the gland (5) is provided with a plurality of ring grooves (14).

7. A urea filter cartridge assembly for a vehicle as set forth in claim 6, wherein: a plurality of open grooves (15) are formed in the clamping part (7) along the radial direction, and the open grooves (15) penetrate through the inner through hole and the outer peripheral surface of the clamping part (7).

8. A urea filter cartridge assembly for a vehicle as defined in claim 1, further comprising: a circle of convex ring (21) is arranged in the cover-shaped part (8) of the gland (5) in a protruding way, and a gap is reserved between the convex ring (21) and the upper boss (19).

9. A urea filter cartridge assembly for a vehicle as defined in claim 1, further comprising: the cover-shaped part (8) of the gland (5) is fixed with the upper cover (4) by friction welding.

10. A urea filter cartridge assembly for a vehicle as defined in claim 1, further comprising: the filter element is fixed with the upper cover (4) and the lower cover (1) by double-sided hot plate welding.