WO2016074633A1

WO2016074633A1 - Filter

Info

Publication number: WO2016074633A1
Application number: PCT/CN2015/094455
Authority: WO
Inventors: 陈国立; 杨振球; 刘大玲; 樊高峰
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
Also published as: CN204261451U

Abstract

A filter (3), comprising: a shell (31), a filter cartridge (32) removably installed inside the shell (31), and a head (33) mated to the shell (31). A lower end (332) is provided on the head (33), and a tube (311) and a connection block (314) located on the top of the tube (311) are provided on the shell (31), the thickness of the connection block (314) being greater than the wall thickness of the tube (311), and an external thread and an inner thread mated to each other are provided at the lower end (332) and the connection block (314).

Description

filter

Technical field

The present invention relates to a filter, and more particularly to a filter disposed in an engine exhaust gas treatment system.

Background technique

Current engine exhaust gas treatment 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. As is well known, the filter is a consumable part that needs to be replaced after it has been used for a period of time. Prior art filters typically include a housing, a filter cartridge mounted within the housing, and a head that is welded to the housing. If the entire filter is replaced, higher maintenance will be required for the user. The cost, at the same time, also makes the intact part of the filter wasted.

Therefore, it is necessary to design a new type of filter to solve the above problems.

Summary of the invention

It is an object of the present invention to provide a filter that is less expensive to maintain.

In order to achieve the above object, the present invention adopts the following technical solution: a filter comprising a housing, a filter cartridge detachably mounted in the housing, and a head matched with the housing, the head being provided a lower end portion, the casing is provided with a tubular portion and a connecting block at the top of the tubular portion, the connecting block has a thickness greater than a wall thickness of the tubular portion, and the lower end portion and the connecting block are provided with a mutual fit Thread and internal thread.

As a further improved technical solution of the present invention, the lower end portion is provided with the external thread, and the connecting block is provided with the internal thread matched with the external thread.

As a further improved technical solution of the present invention, the connecting block is partially formed with the barrel, and the connecting block is welded to the top end of the barrel.

As a further improved technical solution of the present invention, the housing further includes a bottom portion disposed at a bottom end of the cylindrical portion and a spring at the bottom portion and supporting the filter element upward, the bottom portion being welded to the cylindrical portion.

As a further improved technical solution of the present invention, the filter further includes a rubber pad between the filter element and the lower end portion, at least a portion of the lower end portion extending into the rubber pad.

As a further improved technical solution of the present invention, the filter element comprises a filter layer located at the periphery and an inner space surrounded by the filter layer, at least a portion of the rubber pad extending into the filter element.

As a further improved technical solution of the present invention, the head further includes an upper end portion, an inlet joint connected to the upper end portion, and an outlet joint connected to the upper end portion, the lower end portion being located at the bottom of the upper end portion.

As a further improved technical solution of the present invention, the inlet joint and the outlet joint and the upper end portion are separately disposed and assembled.

As a further improved technical solution of the present invention, the filter further includes a sealing ring sleeved on the lower end portion.

As a further improved technical solution of the present invention, the head is a machined part, and the barrel and the connecting block are both made of stainless steel.

Compared with the prior art, the filter of the present invention connects the housing and the head by providing a connecting block. When the filter element needs to be replaced, only the head and the housing need to be unscrewed, so that the filter element can be taken out, so that the entire Filter replacement saves maintenance costs.

DRAWINGS

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

2 is a perspective view of the sensor integrated device of the present invention.

Fig. 3 is a partially exploded perspective view of Fig. 2;

Figure 4 is a side elevational view of the side of the sensor integrated device of the present invention having a second joint.

Figure 5 is a cross-sectional view of the sensor integrated device of the present invention taken along line A-A of Figure 4;

Figure 6 is a schematic view showing the second joint of the sensor integrated device of the present invention not connected to the pipe sleeved in the sleeve.

Figure 7 is a schematic illustration of the conduit of Figure 6 inserted into the second joint.

Figure 8 is a perspective view of the filter of the present invention.

Figure 9 is a partial exploded perspective view of Figure 8.

Figure 10 is a schematic cross-sectional view of the filter of Figure 8.

Figure 11 is a perspective view of the fluid delivery device of the present invention.

Figure 12 is a front elevational view of the fluid delivery device of the present invention.

Figure 13 is a schematic illustration of the removal of the front wall of the fluid delivery device of the present invention.

Figure 14 is a perspective view of another angle of the fluid delivery device of the present invention.

Figure 15 is a bottom plan view showing the front wall of the fluid delivery device of the present invention opening 120 degrees and the first side wall opening 90 degrees.

Figure 16 is a cross-sectional view of the motor in the fluid transfer device of the present invention.

detailed description

Referring to FIG. 1, an engine exhaust gas treatment system 100 is disclosed that is applied to the exhaust gas treatment of engine 200. The engine exhaust gas treatment system 100 includes a urea tank 1, a sensor integration device 2 connected to the urea tank 1, a filter 3 connected downstream of the sensor integration device 2, and a fluid delivery device for conveying the urea solution. 4. A common rail 5 connected to the fluid transport device 4 and a nozzle 6 connected to the common rail 5. In the illustrated embodiment of the invention, the engine 200 is a high power engine that typically exceeds 500 kilowatts. Accordingly, the nozzle 6 typically has a plurality. The nozzle 6 is used to inject a 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 the emission of nitrogen oxides. 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 FIG. 2, the sensor integrated device 2 includes a main body portion 20 in the middle, a first joint 21 on one side of the main body portion 20, and a second joint 22 on the other side of the main body portion 20. . In the illustrated embodiment of the present invention, the main body portion 20 is substantially rectangular, and the first joint 21 and the second joint 22 both have external threads. The first joint 21 is used to be connected to the urea tank 1. Referring to FIGS. 3 and 5, the body portion 20 includes a cavity 23, a surface 24 surrounding the cavity 23, and a urea temperature sensor 25 and a urea pressure sensor 26 mounted on the surface 24. The surface 24 is provided with a first mounting hole 241 communicating with the cavity 23 and a second mounting hole 242 adjacent to the first mounting hole 241. The first mounting hole 241 is for mounting the urea temperature sensor 25, and the second mounting hole 242 is for mounting the urea pressure sensor 26. In the illustrated embodiment of the present invention, the first mounting hole 241 and the second mounting hole 242 are close to each other and are located on the same side of the main body portion 20. So, on the one hand, it is convenient to install the urea temperature sensor 25 and the urea pressure sensor 26 from one side; on the other hand, since the urea temperature sensor 25 is closer to the urea pressure sensor 26, The data of the person facilitates the accuracy of the comprehensive determination by the controller (not shown).

The urea temperature sensor 25 includes a first mounting portion 251 , a first extending portion 252 extending from the first mounting portion 251 , and a first sealing ring 253 sleeved on the first extending portion 252 . When the urea temperature sensor 25 is assembled into the first mounting hole 241, the first sealing ring 253 can achieve a good sealing effect. After assembly, the first mounting portion 251 is pressed against the surface 24. The end of the first extension 252 is exposed within the cavity 23. The urea temperature sensor when the urea solution flows through the cavity 23 25 is able to detect its temperature and conduct the temperature signal to the controller.

The urea pressure sensor 26 includes a second mounting portion 261 and a second extension portion 262 extending from the second mounting portion 261. The inner side of the second mounting hole 242 is provided with an internal thread, and the outer side of the second extending portion 262 is provided with an external thread, and the inner thread can be sealed by the cooperation of the external thread. After assembly, the second mounting portion 261 is pressed against the surface 24. The end of the second extension 262 is exposed within the cavity 23. When the urea solution flows through the chamber 23, the urea pressure sensor 26 is able to detect its pressure and conduct the pressure signal to the controller.

Referring to FIG. 5,

filters

211 and 221 are respectively installed in the first joint 21 and the second joint 22 to filter the urea solution. A first tapered sealing surface 222 located outside the filter 221 is disposed in the second joint 22 . Referring to FIG. 6, in use, the second joint 22 is connected to the pipe 28 through a sleeve 27. Specifically, the sleeve 27 is provided with an opening (not labeled) through which the conduit 28 passes and an internal thread located on the inside. The line 28 includes a head 281 and a sealing ring 282 that is sleeved over the head 281. The head 281 is provided with a second tapered sealing surface 283 corresponding to the first tapered sealing surface 222. Referring to FIG. 7, when assembled, the head 281 of the pipe 28 is inserted into the second joint 22, so that the first tapered sealing surface 222 is fitted to the second tapered sealing surface 283. To achieve a good seal. Additionally, the seal ring 282 is located between the first tapered sealing surface 222 and the second tapered sealing surface 283 for further sealing. The internal thread of the sleeve 27 cooperates with the external thread of the second joint 22, such that the line 28 and the second joint 22 are connected within the sleeve 27.

At present, there are many types of urea tanks on the market. Some urea tanks have liquid level sensors, while others do not. Therefore, designing an exhaust gas treatment system that can be applied to various types of urea tanks is a technical problem that the industry needs to solve. . According to the sensor integrated device 2 of the present invention, a urea temperature sensor 25 and a urea pressure sensor 26 are mounted thereon. In this way, even if the urea tank 1 itself does not have a liquid level sensor, the present invention can infer the liquid level in the urea tank 1 by converting the pressure signal of the urea pressure sensor 26 into a corresponding electrical signal. That is to say, the sensor integrated device 2 of the present invention can be applied to all types of urea tanks 1, which greatly facilitates the application of the customer. The sensor integrated device 2 realizes intelligent integration of accurate monitoring, voltage regulation and multi-stage purification of urea.

Referring to FIGS. 8-10, the filter 3 includes a housing 31, a filter element 32 mounted in the housing 31, and a head 33 that cooperates with the housing 31. The filter element 32 has a substantially hollow cylindrical shape including a filter layer 321 at the periphery and an inner space 322 surrounded by the filter layer 321 . The head 33 includes The end portion 331, a lower end portion 332 at the bottom of the upper end portion 331, an inlet joint 333 connected to one side of the upper end portion 331, and an outlet joint 334 connected to the other side of the upper end portion 331. The inlet fitting 333 and the outlet fitting 334 are disposed separately from the upper end portion 331 and then assembled together for ease of replacement. The upper end portion 331 and the lower end portion 332 are machined parts and are of a unitary structure. 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.

Referring to FIG. 10, the filter 3 further includes a rubber pad 34 between the filter element 32 and the lower end portion 332. At least a portion of the lower end portion 332 extends into the rubber pad 34, and at least a portion of the rubber pad 34 extends into the filter element 32.

The housing 31 includes a cylindrical portion 311, a bottom portion 312 at a bottom end of the cylindrical portion 311, a spring 313 disposed at the bottom portion 312 to support the filter element 32 upward, and a connection at a top end of the cylindrical portion 311. Block 314. In the illustrated embodiment of the invention, the connecting block 314 is welded to the top end of the tubular portion 311. The connecting block 314 is provided with internal threads. Correspondingly, the lower end portion 332 is provided with an external thread that cooperates with the internal thread. In order to enhance sealing and dust protection, the filter 3 further includes a sealing ring 315 that is sleeved on the lower end 332. Since the tubular portion 311 is relatively thin, it cannot provide a threaded structure, and the present invention solves this problem in an ingenious manner by providing the connecting block 314, thereby saving cost. Referring to FIG. 10, the thickness of the connecting block 314 is greater than the thickness of the cylindrical portion 311. Further, in the illustrated embodiment of the present invention, the bottom portion 312 and the tubular portion 311 are separately provided and then welded together, and the cost is low. In one embodiment of the invention, the housing 31 is made of stainless steel in order to be resistant to alkaline solutions.

In the illustrated embodiment of the present invention, the filter 3 is an external in-and-out filter, and the flow direction of the urea solution is shown in FIG.

The present invention is configured by screwing the housing 31 and the head portion 33. When the filter element 32 needs to be replaced, it is only necessary to unscrew the head portion 33 and the housing 31. The overall replacement of the filter 3 is performed, thereby saving maintenance costs.

Referring to FIGS. 11 to 15, the fluid delivery device 4 includes an integrated cabinet 41, a pump 42 installed in the integrated cabinet 41, an inlet line 43 on one side of the pump 42, and the pump. An outlet line 44 on the other side of the 42 and a controller 45 mounted in the integrated cabinet 41 (see Figs. 13 and 15).

The integrated cabinet 41 is substantially rectangular parallelepiped and includes a front wall 411, a rear wall 412, a top wall 413, a bottom wall 414, a first side wall 415, and a second side wall 416. In the illustrated embodiment of the present invention, the front wall 411 is a main operation interface, and the front wall 411 is provided with a human-machine interaction interface 4111, an emergency stop switch 4112, a main power switch 4113, Indicator 4114 and door lock 4115 are monitored. The human-machine interaction interface 4111, the emergency stop switch 4112, and the main power switch 4113 are disposed in the middle of the front wall 411, and are arranged in order from top to bottom in the vertical direction. With this arrangement, the main operation interface as a whole satisfies a simple, symmetrical aesthetic design. The human-computer interaction interface 4111, the emergency stop switch 4112 and the main power switch 4113 are both centered on the front wall 411, and the upper and lower positions follow ergonomic principles to ensure excellent operational line of sight comfort. The emergency stop switch 4112 quickly interrupts the system power source when an unexpected situation occurs in the system, and follows the maximum principle to ensure the safety of the system. The monitoring indicator 4114 can monitor and display the working state of the system in real time and online. In the illustrated embodiment of the invention, the monitoring indicator 4114 is a three color light (eg, red, yellow, green). The three-color lamp is a lamp, and in different working states, the monitoring indicator 4114 performs light display of different colors and frequencies. Through the display of the light, the working state of the system can be known at a glance. Compared with the prior art, three lamps are used to display different colors, and the three-color lamp of the invention can save cost and layout. The door lock 4115 is a yin-yang triangular opening and closing structure in the illustrated embodiment of the present invention, which imparts excellent physical safety characteristics to the system.

A plurality of wire harness joints 4151 are mounted on the first side wall 415, and the wire harness joints 4151 are respectively connected inwardly with the controller 45, the pump 42, and various sensors, etc., respectively, outwardly and externally with signals of the system and Power supply and other connections. In the illustrated embodiment of the present invention, the harness connector 4151 is both near the bottom of the integrated cabinet 41, reducing the vibration intensity of the harness connector 4151. The controller 45 is located inside the first side wall 415.

Referring to FIG. 15, the front wall 411 can be opened 120 degrees with respect to the closed state position, and the first side wall 415 can be opened 90 degrees. Both the front wall 411 and the first side wall 415 have the same opening direction (for example, counterclockwise reverse in FIG. 15) to ensure the convenience of production and maintenance of the system.

It should be noted that the first side wall 415 is connected to the integrated cabinet 41 through a fixing mechanism on the inner side thereof. This design can save a set of door locks and make the outer side of the first side wall 415 simple and beautiful. . In use, if the first side wall 415 is to be opened, the front wall 411 is first opened, and then the fixing mechanism is unlocked from the inner side, and finally the first side wall 415 is opened.

Referring to FIG. 14, the rear wall 412 is provided with a U-shaped support mechanism 4121, so that the integrated cabinet 41 can be wall-mounted. The supporting mechanism 4121 is provided with mounting holes 4122. Each of the mounting holes 4122 includes a wide opening guide portion 4123 and a narrow opening positioning portion 4124 to ensure easy and safe assembly performance.

Referring to Figure 13, in the illustrated embodiment of the invention, the pump 42 is a gear pump. The pump 42 includes a motor 421 at the bottom, a pump head 422 at the top, and the motor 421 and the pump head 422. Magnetic coupling portion 423 between. Referring to FIG. 16, the motor 421 includes a motor output shaft 4211. A U-shaped urea flow path 4221 and a gear mechanism 4222 located at the bottom of the urea flow path 4221 are disposed in the pump head 422. The magnetic coupling portion 423 includes an active magnetic disk drive 4231 and a driven magnetic disk drive 4232. The motor shaft 4211 is connected and fixed to the active magnetic disk 4231. The driven magnetic drive 4232 is provided with a pump head input shaft 4233, and the pump head input shaft 4233 is connected and fixed to the gear mechanism 4222.

In operation, the motor 421 is powered on, the motor output shaft 4211 drives the active magnetic disk drive 4231 to rotate, and then the active magnetic disk drive 4231 drives the pump head input shaft 4233 to rotate, and the pump head input shaft 4233 further drives the gear. The mechanism 4222 rotates to cause the urea solution to flow in the direction of the arrow and increase the outlet pressure of the urea solution. In the illustrated embodiment of the present invention, since the gear mechanism 4222 is located at the bottom of the urea flow path 4221, it is possible to prevent air bubbles in the urea solution from accumulating inside the pump head 422, thereby ensuring the working efficiency of pumping liquid and Deliver the accuracy of metering control.

The inlet line 43 includes a pump front monitoring module 431 at the bottom end, an inlet tube 432 connecting the pump front monitoring module 431, and an inlet connection tube 433 connecting the inlet tube 432 to the pump head 422. The inlet line 43 connected by a plurality of components can provide convenient maintenance. In the illustrated embodiment of the present invention, the pre-pump monitoring module 431 has a hexagonal structure and is characterized by high reliability, compactness, and light weight. The pump front monitoring module 431 is mounted with a negative pressure sensor 4311 and a urea temperature sensor, wherein by monitoring the negative pressure sensor 4311, it can be determined whether the filter 3 needs to be replaced.

Similarly, the outlet line 44 includes a post-pump monitoring module 441 at the bottom end, an outlet tube 442 that connects the post-pump monitoring module 441, and an outlet connection tube 443 that connects the outlet tube 442 to the pump head 422. . The outlet line 44 connected by a plurality of components can provide convenient maintenance. In the illustrated embodiment of the present invention, the post-pump monitoring module 441 has a hexagonal structure and is characterized by high reliability, compactness, and weight reduction. A pressure sensor 4411 is mounted on the post-pump monitoring module 441 to detect the pressure of the high pressure section.

In the illustrated embodiment of the present invention, the pre-pump monitoring module 431 and the post-pump monitoring module 441 are both perforated, that is, the pre-pump monitoring module 431 and the post-pump monitoring module 441 are both traversed. The bottom wall 414 of the integrated cabinet 41 is described. The pre-pump monitoring module 431 is provided with a urea suction interface 4310. The post-pump monitoring module 441 is provided with a urea output interface 4410. The urea suction interface 4310 and the urea output interface 4410 are both located in the integrated cabinet 41. At the bottom, the external urea pipeline is arranged to be fully protected, avoiding mechanical collisions, other liquids and dust pollution. In addition, the pre-pump monitoring module 431 and the post-pump monitoring module 441 both adopt parallel urea piping design to minimize pressure loss.

Referring to FIG. 13, in the illustrated embodiment of the present invention, the flow path of the urea solution forms a liquid coil type temperature cooling in the integrated cabinet 41. The pump 42 serves as a power source for urea delivery, and is disposed on the adjustment support mechanism 4125 of the rear wall 412 in a wall-mounted manner to ensure tolerance and adjustability in the assembly process in the up and down direction. In the illustrated embodiment of the present invention, the pump 42 is arranged in a vertical direction, the pump head 422 is vertically upward, and on the one hand, the active magnetic drive 4231 and the driven magnetic field can be ensured based on the magnetic drive mechanism. The alignment performance of the drive 4232 improves the transmission efficiency of the magnetic driving force in the pump assembly; on the other hand, it can eliminate the air bubbles accumulated in the urea solution in the pump body, ensure the working efficiency of the pump 42 pumping liquid, and deliver the metering The precision of the control.

Referring to FIG. 13 , a pump driving module 4131 installed inside the top wall 413 is further disposed in the integrated cabinet 41 . This design enables the pump drive module 4131 to be in a higher position to avoid short circuits due to overflow of the urea solution. The pump driving module 4131 is in close contact with the top wall 413. In this way, the heat generated by the operation of the pump driving module 4131 can be dissipated in time to ensure the normal operating temperature of the pump driving module 4131. Additionally, because the pump drive module 4131 is adjacent to the pump head 422, the urea solution within the pump head 422 also carries away some of the thermal energy radiated by the pump drive module 4131.

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 comprising a housing, a filter cartridge detachably mounted in the housing, and a head that cooperates with the housing, wherein the head portion is provided with a lower end portion, and the housing is provided There is a tubular portion and a connecting block at the top of the tubular portion, the connecting block has a thickness greater than a wall thickness of the tubular portion, and the lower end portion and the connecting block are provided with external and internal threads that cooperate with each other.
A filter according to claim 1, wherein said lower end portion is provided with said external thread, and said connecting block is provided with said internal thread engaged with said external thread.
The filter according to claim 1, wherein said connecting block is partially formed with said barrel, and said connecting block is welded to a top end of said barrel.
A filter according to claim 1, wherein said housing further comprises a bottom portion provided at a bottom end of said barrel portion and a spring at said bottom portion and supporting said filter element upwardly, said bottom portion and said barrel The parts are welded together.
The filter of claim 1 wherein said filter further comprises a rubber pad between said filter element and said lower end, said lower end extending at least partially into said rubber pad.
A filter according to claim 5 wherein said filter element comprises a filter layer at the periphery and an interior space surrounded by said filter layer, at least a portion of said rubber pad extending into said filter element.
A filter according to claim 1, wherein said head further comprises an upper end portion, an inlet joint connected to the upper end portion, and an outlet joint connected to the upper end portion, said lower end portion being located at the bottom of said upper end portion .
The filter according to claim 7, wherein said inlet joint is assembled separately from said outlet joint and said upper end portion.
The filter of claim 1 wherein said filter further comprises a sealing ring sleeved over said lower end.
The filter according to any one of claims 1 to 9, wherein the head is a machined part, and the barrel and the connecting block are each made of stainless steel.