WO2016074630A1

WO2016074630A1 - Filter assembly

Info

Publication number: WO2016074630A1
Application number: PCT/CN2015/094448
Authority: WO
Inventors: 杨振球; 樊高峰; 林魁; 陈国立; 刘大玲
Original assignee: 天纳克（苏州）排放系统有限公司
Priority date: 2014-11-14
Filing date: 2015-11-12
Publication date: 2016-05-19

Abstract

Disclosed is a filter assembly (3), comprising a first filter (31) and a second filter (32), wherein the first filter (31) comprises a first housing (311), a first filter insert (312) and a first head portion (313), and the first head portion (313) is provided with a first inlet passage (341) and a first outlet passage (342). The second filter (32) comprises a second housing (321), a second filter insert and a second head portion (323), and the second head portion (323) is provided with a second inlet passage (371) and a second outlet passage (372). The first inlet passage (341) is in communication with the second inlet passage (371), and the first outlet passage (342) is in communication with the second outlet passage (372). The first filter (31) and the second filter (32) are separately arranged, and the first head portion (313) and the second head portion (323) are detachably assembled together by means of a fixing part. Filters of an appropriate number can be chosen to be combined according to different application requirements.

Description

Filter assembly

Technical field

The present invention relates to a filter assembly, and more particularly to a filter assembly for use in an engine exhaust aftertreatment system for filtering a urea solution.

Background technique

Current engine exhaust aftertreatment systems typically include a urea tank, a urea pump for withdrawing urea solution from the urea tank, and a filter for filtering the urea solution.

When the filter is used in a large engine aftertreatment system, in order to meet certain filtration capabilities, it is necessary to design a larger size filter. In addition, different engine aftertreatment systems often need to be designed with matching filters. This solution requires different filters for different engine aftertreatment systems, which greatly increases the cost.

Therefore, it is necessary to design a new filter assembly based on combining several filters to solve the above problems.

Summary of the invention

It is an object of the present invention to provide a filter assembly that is more expandable.

To achieve the above object, the present invention adopts the following technical solution: a filter assembly including at least a first filter and a second filter, wherein the first filter includes a first housing, located in the first housing a first filter element in the body and a first head that cooperates with the first housing, the first head is provided with a first inlet passage and a first outlet passage; and the second filter comprises a second housing a second filter element located in the second housing and a second head portion cooperating with the second housing, the second head portion is provided with a second inlet passage and a second outlet passage; An inlet passage communicating with the second inlet passage, the first outlet passage being in communication with the second outlet passage, the first filter being disposed separately from the second filter and detachably assembled by a fixing member Together, the fixing member detachably assembles the first head and the second head together.

As a further improved technical solution of the present invention, the first filter and the second filter are connected in parallel in a flow mode.

As a further improved technical solution of the present invention, the first filter includes a first inlet space between the first filter element and the first housing and in communication with the first inlet passage, and is located at a first outlet space in the first filter element and in communication with the first outlet passage; the second filter includes a second filter element between the second filter element and the second housing a second inlet space in which the two inlet passages communicate, and a second outlet space in the second filter element and in communication with the second outlet passage.

As a further improvement of the technical solution of the present invention, the first filter includes a first distribution tray, and the first distribution tray is provided with a plurality of first leak holes distributed in a circumferential direction, the first leak holes to be the first An inlet passage is connected to the first inlet space; the second filter includes a second distribution tray, and the second distribution tray is provided with a plurality of second leakage holes distributed in a circumferential direction, the second leakage hole The second inlet passage is connected to the second inlet space.

As a further improved technical solution of the present invention, the first inlet passage and the first outlet passage are parallel to each other, the second inlet passage and the second outlet passage are parallel to each other, the first inlet passage and the first inlet passage The second inlet passages are aligned with each other, and the first outlet passage and the second outlet passage are aligned with each other.

As a further improved technical solution of the present invention, the filter assembly further includes a first sealing ring installed between the first inlet passage and the second inlet passage, and a first outlet passage and a seat A second seal ring between the second outlet passages.

As a further improved technical solution of the present invention, the first inlet passage penetrates the first head, and a first opening and a second opening are respectively formed on both sides of the first head; the first outlet passage is also a third opening and a fourth opening are formed on both sides of the first head, respectively, through the first head; wherein the first opening and the third opening are located on the same side of the first head The second opening and the fourth opening are located on the same side of the first head; the second inlet passage extends through the second head to form a first side on the two sides of the second head a fifth opening and a sixth opening; the second outlet passage also extends through the second head, forming a seventh opening and an eighth opening on both sides of the second head, respectively; wherein the fifth opening and the opening The seventh opening is located on the same side of the second head, the sixth opening and the eighth opening are located on the same side of the second head; the second opening is in contact with the fifth opening, The fourth opening is in contact with the seventh opening, the first sealing ring Within said second opening, said second seal ring is located within the fourth opening.

As a further improved technical solution of the present invention, the filter assembly further includes an inlet joint inserted in the first opening and an outlet joint inserted in the third opening.

As a further improvement of the technical solution of the present invention, the first housing is provided with a first cylindrical portion and welded to the first a first connecting block at the top of the tubular portion, the first connecting block has a thickness greater than a wall thickness of the first tubular portion, and the first head portion and the first connecting block are provided with a mating external thread and The internal thread is such that the first filter element can be detachably mounted in the first housing.

As a further improved technical solution of the present invention, the fixing member includes a bolt and a nut that cooperates with the bolt.

As a further improvement of the technical solution of the present invention, the first head portion is provided with a first mounting portion at a bottom thereof, and the first mounting portion is provided with a first mounting slot extending transversely, the first mounting slot being parallel to a first inlet passage; the second head portion is provided with a second mounting portion at a bottom thereof, the second mounting portion is provided with a downwardly extending slot; the bolt is received in the first mounting slot The nut is received in the slot.

As a further improved technical solution of the present invention, the second mounting portion is provided with a second mounting slot extending transversely, the second mounting slot is parallel to the second inlet channel, the slotting and the second mounting The slots are in communication, and the second mounting slots are for receiving bolts that cooperate with the third filter.

Compared with the prior art, the first filter of the filter assembly of the present invention is separately disposed from the second filter and detachably assembled by the fixing member, and the system design can be realized, and a suitable number is selected according to different application requirements. Filters are combined to increase scalability.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic diagram of an engine exhaust aftertreatment system of the present invention.

Figure 2 is a perspective view of the filter assembly of Figure 1.

Figure 3 is a perspective view of another angle of Figure 2.

Fig. 4 is a front view of Fig. 2;

Fig. 5 is a bottom view of Fig. 2;

Figure 6 is a left side view of Figure 2.

Figure 7 is a partial exploded perspective view of Figure 2 with the first filter separated from the second filter and the second filter assembled with the third filter.

Figure 8 is an exploded perspective view of another angle of Figure 7.

Figure 9 is an exploded perspective view of another angle of Figure 8 with the filter housing not shown.

Figure 10 is a partially exploded perspective view of the first filter of Figure 7.

Figure 11 is a cross-sectional view of the first filter.

Figure 12 is a cross-sectional view of the filter assembly of the present invention at a certain position.

Figure 13 is a cross-sectional view of the filter assembly of the present invention at another location.

detailed description

Referring to Figure 1, the present invention discloses an exhaust aftertreatment system 100 that can be applied to a large engine, comprising a urea tank 1, a filter assembly 3 connected to the urea tank 1, for transporting the urea. A fluid delivery device 4 for solution, a common rail 5 connected to the fluid delivery device 4, a plurality of nozzles 6 connected to the common rail 5, and a controller 2 for controlling the exhaust aftertreatment system 100.

In the illustrated embodiment of the invention, the engine 200 is a high power engine that typically exceeds 500 kilowatts. The fluid delivery device 4 is provided with a pump 41 (for example a gear pump or the like) for pumping a urea solution. In the illustrated embodiment of the invention, the controller 2 is mounted on the fluid delivery device 4 for integration. The nozzle 6 is used to inject an atomized urea solution into the engine exhaust pipe 201. The atomized urea solution is decomposed into ammonia gas in the engine exhaust pipe 201, and the ammonia gas can react with nitrogen oxides in the exhaust gas, thereby reducing nitrogen oxide emissions. In view of the fact that the principles of such exhaust gas treatment techniques are well known to those skilled in the art, the invention is not described herein.

Referring to FIGS. 2 to 13, in the illustrated embodiment of the present invention, the filter assembly 3 includes a first filter 31, a second filter 32, and a third filter 33 that are connected together side by side. . The structures of the first, second, and

third filters

31, 32, 33 are very similar to facilitate sharing of equipment/mold, saving manufacturing costs. The following description will be made only by taking the first filter 31 as an example.

Referring to FIG. 7 to FIG. 13 , the first filter 31 includes a first housing 311 , a first filter element 312 mounted in the first housing 311 , and a first housing 311 . The first head 313.

The first housing 311 includes a first cylindrical portion 3111, a first bottom portion 3112 at a bottom end of the first cylindrical portion 3111, and a spring disposed on the first bottom portion 3112 to support the first filter element 312 upward. 3113, and a first connecting block 3114 located at a top end of the first cylindrical portion 3111. In the illustrated embodiment of the invention, the first connecting block 3114 is welded to the top end of the first cylindrical portion 3111. The first connecting block 3114 is provided with internal threads.

Correspondingly, the lower end of the first head 313 is provided with an external thread that cooperates with the internal thread. Since the first cylindrical portion 3111 is relatively thin and its thickness cannot be provided with a thread structure, the present invention solves this problem in an ingenious manner by providing the first connecting block 3114, thereby saving cost. Referring to FIG. 11, the thickness of the first connecting block 3114 is greater than the thickness of the first cylindrical portion 3111. In addition, in the illustrated embodiment of the present invention, the first bottom portion 3112 and the first cylindrical portion 3111 are separately disposed and then welded together, and the cost is low. In the present invention In one embodiment, the first housing 311 is made of stainless steel in order to be resistant to an alkaline solution.

In the illustrated embodiment of the invention, the first filter 31 is an external in-and-out filter. The first filter element 312 has a substantially hollow cylindrical shape. A first inlet space 3141 is formed between the first housing 311 and the first filter element 312, and a hollow portion of the first filter element 312 forms a first outlet space 3142.

In addition, as shown in FIG. 10, the first filter 31 further includes a first distribution tray 315 at an upper end of the first inlet space 3141, and the first distribution tray 315 is provided with a plurality of sections distributed along the circumference. a leak hole 3151, the first leak hole 3151 is in communication with the first inlet space 3141.

Referring to FIGS. 10 and 11 , the first filter 31 further includes a first rubber pad 316 between the first head 313 and the first filter element 312 .

In the illustrated embodiment of the invention, the first head 313 is a machined piece and is of unitary construction. This setting saves the cost of mold opening. At the same time, the inlet and outlet holes of the machined parts can be opened relatively large to meet the requirements of large flow. The first head portion 313 is screwed to the first housing 311, and is disposed. When the first filter element 312 needs to be replaced, only the thread needs to be unscrewed, and the entire filter replacement is not required. , which saves maintenance costs.

Referring to FIG. 2 to FIG. 13 , the first head portion 313 includes a first body portion 34 , a first positioning portion 35 extending from one side of the first body portion 34 and extending upward, and the first portion Two first mounting portions 36 on both sides of the bottom of the main body portion 34, wherein the first positioning portion 35 is provided with a plurality of first positioning holes 351 for mounting and fixing the first filter 31.

The first body portion 34 includes opposite side faces 340, a first inlet passage 341 extending through the two side faces 340, and a first outlet passage 342 extending through the two side faces 340. The first inlet passage 341 and the first outlet passage 342 are parallel to each other. The first inlet passage 341 respectively defines a first opening 3411 and a second opening 3412 on both sides of the first head 313; similarly, the first outlet passage 342 is respectively at the first head 313 A third opening 3421 and a fourth opening 3422 are formed on both sides. The first opening 3411 and the third opening 3421 are located on the same side of the first head 313, and the second opening 3412 and the fourth opening 3422 are located on the same side of the first head 313. side. The first filter 31 further includes an inlet fitting 343 inserted in the first opening 3411 and an outlet fitting 344 inserted in the third opening 3421.

As shown in FIG. 9 , the bottom portion of the first head portion 313 is further provided with a first crescent groove 3131 communicating with the first leak hole 3151 on the first distribution tray 315 and the first exit space 3142 . Connected outlet holes 3132. The first lunar groove 3131 is in communication with the first inlet passage 341, and the outlet hole 3132 is in communication with the first outlet passage 342. The first mounting portion 36 is provided with a first mounting slot 363 extending transversely and a slot 364 communicating with the first mounting slot 363 and penetrating downwardly, the first mounting slot 363 being parallel to the first inlet Channel 341.

The second filter 32 is very similar in structure to the first filter 31 and is briefly described as follows.

The second filter 32 includes a second housing 321 , a second filter element (not shown) mounted in the second housing 321 , and a second head 323 that cooperates with the second housing 321 . .

The second housing 321 is identical to the first housing 311, and the second filter element is identical to the first filter element 312. A second inlet space (not shown) is formed between the second casing 321 and the second filter element, and a hollow portion of the second filter element forms a second outlet space (not shown).

The second filter 32 further includes a second distribution tray 325 at an upper end of the second inlet space, and the second distribution tray 325 is provided with a plurality of second leak holes 3251 distributed along the circumference, the second drain A hole 3251 is in communication with the second inlet space.

The bottom of the second head 323 is further provided with a second crescent 3231 communicating with the second leak hole 3251 on the second distribution tray 325 and an exit hole 3232 communicating with the second outlet space.

In the illustrated embodiment of the invention, the second head 323 is a machined piece and is of unitary construction. This setting saves the cost of mold opening. At the same time, the inlet and outlet holes of the machined parts can be opened relatively large to meet the requirements of large flow. The second head 323 is screwed to the second housing 321 so as to be disposed. When the second filter element needs to be replaced, the thread only needs to be unscrewed, and the entire filter replacement is not required. This saves maintenance costs.

Referring to FIGS. 2 to 13 , the second head portion 323 includes a second body portion 37 , a second positioning portion 38 extending from one side of the second body portion 37 and extending upward, and the second portion Two second mounting portions 39 on both sides of the bottom of the main body portion 37, wherein the second positioning portion 38 is provided with a plurality of second positioning holes 381 for mounting and fixing the second filter 32.

The second body portion 37 includes opposite side faces 370, a second inlet passage 371 extending through the two side faces 370, and a second outlet passage 372 extending through the two side faces 370. The second inlet passage 371 and the second outlet passage 372 are parallel to each other. The second lunar canal 3231 is in communication with the second inlet passage 371, and the outlet aperture 3232 is in communication with the second outlet passage 372. The second inlet passage 371 respectively forms a fifth opening 3711 and a sixth opening 3712 on both sides of the second head 323; similarly, the first The second outlet passages 372 respectively form a seventh opening 3721 and an eighth opening 3722 on both sides of the second head portion 323. The fifth opening 3711 and the seventh opening 3721 are located on the same side of the second head 323, and the sixth opening 3712 and the eighth opening 3722 are located on the same side of the second head 323. .

In the illustrated embodiment of the invention, the first filter 31 is disposed separately from the second filter 32 and detachably assembled together by a fixing member; the second filter 32 and the third filter The filters 33 are separately provided and detachably assembled by a fixing member. The fixing member includes a bolt 361 and a nut 362 that cooperates with the bolt 361. The first mounting portion 36 is provided with a first mounting slot 363 extending transversely, the first mounting slot 363 being parallel to the first inlet passage 341. The second mounting portion 39 is provided with a second mounting groove 391 penetrating in a lateral direction and a slot 392 communicating with the second mounting groove 391 and penetrating downward. The second mounting groove 391 is parallel to the second inlet passage 371.

In the illustrated embodiment of the invention, the first filter 31 is disposed separately from the second filter 32 and detachably assembled together by a fixing member; the second filter 32 and the third filter The filters 33 are separately provided and detachably assembled by a fixing member. The fixing member includes a bolt 361 and a nut 362 that cooperates with the bolt 361.

When the first filter 31 and the second filter 32 are assembled to each other, the second opening 3412 is in contact with the fifth opening 3711, and the fourth opening 3422 is in contact with the seventh opening 3721. In order to improve the reliability of the seal, the filter assembly 3 further includes a first sealing ring 365 received in the second opening 3412 and a second sealing ring 366 received in the fourth opening 3422. The first inlet passage 341 and the second inlet passage 371 are aligned with each other, and the first outlet passage 342 and the second outlet passage 372 are aligned with each other. The bolt 361 is received in the first mounting groove 363 in the lateral direction. The nut 362 is received in the slot 392 from the bottom upward, and the bolt 361 is tightened with the nut 362. As such, the fixing member detachably assembles the first head portion 313 of the first filter 31 and the second head portion 323 of the second filter 32.

Of course, it can be understood that the filter assembly 3 of the present invention is sequentially assembled, that is, the second filter 32 and the third filter 31 should be assembled first, that is, the bolt 361 is inserted into the second mounting groove. The nut 362 is inserted into the third filter 31 and tightened in 391. Then, the first filter 31 and the second filter 32 are assembled again to avoid assembly interference.

Referring to Figure 12, the flow direction of the fluid of the present invention will be described below.

The first filter 31, the second filter 32 and the third filter 33 are connected in parallel in a flow pattern.

First, the fluid flows from the inlet joint 343 into the first inlet passage 341, a portion of the fluid flows into the first crescent groove 3131, and passes through the first first leak holes 3151 on the first distribution tray 315, into the first inlet space 3141, which portion The fluid permeates through the first filter element 312, enters the first outlet space 3142, then flows into the first outlet passage 342 through the outlet opening 3132, and finally exits from the outlet joint 344; another portion of the fluid flows into the second inlet passage 371, and then A portion flows into the second crescent 3231 and passes through a plurality of second leak holes 3251 on the second distribution tray 325 into the third inlet space, the portion of the fluid permeating through the second filter element into the second outlet space, and then It then flows through the exit aperture into the second outlet passage 372 and finally exits from the outlet joint 344. The flow direction of the fluid in the third filter 33 is the same as the flow direction in the second filter 32.

The first filter 31, the second filter 32, and the third filter 33 of the filter assembly 3 of the present invention are separately disposed and detachably assembled by the fixing member, and can be systematically designed, and are appropriately selected according to different application requirements. The number of filters is combined to increase the scalability.

In addition, the above embodiments are only for explaining the present invention and are not intended to limit the technical solutions described in the present invention. The understanding of the present specification should be based on those skilled in the art, for example, "front and rear through" means that other parts are not installed. It has been exemplified before, for example, directional descriptions of "front", "back", "left", "right", "upper", "lower", etc., although the present specification has been carried out with reference to the above embodiments. DETAILED DESCRIPTION OF THE INVENTION However, those skilled in the art should understand that the invention may be modified or equivalently replaced by those skilled in the art without departing from the spirit and scope of the invention. It is intended to be included within the scope of the appended claims.

Claims

A filter assembly including at least a first filter and a second filter, wherein the first filter includes a first housing, a first filter element located within the first housing, and the first housing a body-fitted first head, the first head being provided with a first inlet passage and a first outlet passage; the second filter comprising a second housing, a second filter located in the second housing And a second head that cooperates with the second housing, the second head is provided with a second inlet passage and a second outlet passage; the first inlet passage is in communication with the second inlet passage, The first outlet passage communicates with the second outlet passage, wherein the first filter is separately disposed from the second filter and detachably assembled by a fixing member, the fixing member The first head and the second head are detachably assembled.
The filter assembly of claim 1 wherein said first filter and said second filter are in parallel in flow.
The filter assembly of claim 2 wherein said first filter comprises a first portion between said first filter element and said first housing and in communication with said first inlet passage An inlet space, and a first outlet space located in the first filter element and in communication with the first outlet passage; the second filter includes a second filter housing and the second housing a second inlet space in communication with the second inlet passage, and a second outlet space located in the second filter element and in communication with the second outlet passage.
A filter assembly according to claim 3, wherein said first filter comprises a first distribution tray, said first distribution tray being provided with a plurality of first leak holes distributed in a circumferential direction, said first a leak hole connecting the first inlet passage with the first inlet space; the second filter includes a second distribution plate, and the second distribution plate is provided with a plurality of second leak holes distributed along the circumference. The second leak hole connects the second inlet passage to the second inlet space.
The filter assembly of claim 1 wherein said first inlet passage and said first outlet passage are parallel to each other, said second inlet passage and said second outlet passage being parallel to each other, said An inlet passage is aligned with the second inlet passage, and the first outlet passage and the second outlet passage are aligned with each other.
The filter assembly of claim 5 wherein said filter assembly further comprises a first sealing ring mounted between said first inlet passage and said second inlet passage, and mounted in said a second sealing ring between the first outlet passage and the second outlet passage.
The filter assembly of claim 6 wherein said first inlet passage extends through said first head and defines a first opening and a second opening on each side of said first head; The first outlet passage also penetrates the first head, and a third opening and a fourth opening are respectively formed on both sides of the first head; wherein the first opening and the third opening are located at the first a same side of a head, the second opening and the fourth opening are located on the same side of the first head; the second inlet passage extends through the second head, respectively at the second head a fifth opening and a sixth opening are formed on both sides of the portion; the second outlet passage also penetrates the second head, and a seventh opening and an eighth opening are respectively formed on both sides of the second head; The fifth opening and the seventh opening are located on the same side of the second head, the sixth opening and the eighth opening are located on the same side of the second head; the second opening and the second opening a fifth opening contact, the fourth opening being in contact with the seventh opening, the first A seal ring is located in the second opening, and the second seal ring is located in the fourth opening.
The filter assembly of claim 7 wherein said filter assembly further comprises an inlet fitting inserted into said first opening and an outlet fitting inserted into said third opening.
A filter assembly according to claim 1 wherein said first housing is provided with a first tubular portion and a first connecting block welded to the top of said first tubular portion, said first connecting block The thickness of the first tubular portion is greater than the thickness of the first tubular portion, and the first connecting portion and the first connecting block are provided with external and internal threads, so that the first filter element can be detachably mounted on Inside the first housing.
A filter assembly according to any one of claims 1 to 9, wherein the fixing member comprises a bolt and a nut that cooperates with the bolt.
A filter assembly according to claim 10, wherein said first head portion is provided with a first mounting portion at a bottom portion thereof, and said first mounting portion is provided with a first mounting groove extending transversely, said a first mounting groove parallel to the first inlet passage; a second mounting portion provided with a second mounting portion at a bottom thereof, the second mounting portion being provided with a downwardly extending slot; the bolt is received in The nut is received in the slot in the first mounting slot.