阅读说明：本技术 流体输送装置 (Fluid delivery device ) 是由 陈川 孙树平 林银山 于 2018-08-28 设计创作，主要内容包括：一种流体输送装置,用于发动机尾气处理系统中输送尿素溶液。所述流体输送装置包括集成柜、安装于所述集成柜内的泵、连接所述泵的进口管路以及连接所述泵的出口管路。所述泵包括位于底部的电机、位于顶部的泵头以及位于所述电机与所述泵头之间的磁性耦合部。所述泵头、所述磁性耦合部以及所述电机自上而下布置,所述泵头内设有U形的流道以及位于所述流道最底部的齿轮机构。所述集成柜包括门板以及用以将所述门板与所述集成柜的对应部分实现密封的环形密封件,提高了防水等级。(A fluid conveying device is used for conveying urea solution in an engine tail gas treatment system. The fluid conveying device comprises an integrated cabinet, a pump arranged in the integrated cabinet, an inlet pipeline connected with the pump and an outlet pipeline connected with the pump. The pump includes a motor located at the bottom, a pump head located at the top, and a magnetic coupling located between the motor and the pump head. The pump head, the magnetic coupling part and the motor are arranged from top to bottom, and a U-shaped flow channel and a gear mechanism located at the bottommost part of the flow channel are arranged in the pump head. The integrated cabinet comprises a door plate and an annular sealing element for sealing the door plate and the corresponding part of the integrated cabinet, and the waterproof grade is improved.)

1. A fluid delivery device for delivering urea solution in an exhaust gas treatment system of an engine, said fluid delivery device comprising an integrated cabinet, a pump mounted in said integrated cabinet, an inlet conduit connecting said pump, and an outlet conduit connecting said pump, said pump comprising a motor at the bottom, a pump head at the top, and a magnetic coupling between said motor and said pump head, characterized in that: the integrated cabinet comprises a door plate and an annular sealing piece used for sealing the door plate and the corresponding part of the integrated cabinet.

2. The fluid delivery device according to claim 1, wherein: the inlet pipeline and the outlet pipeline are respectively connected to two ends of the flow channel, and the inlet pipeline, the outlet pipeline and the pump head are connected with each other to form an inverted U shape.

3. The fluid delivery device according to claim 1, wherein: the annular seal is made of a silicone rubber material.

4. The fluid delivery device according to claim 1, wherein: the door plate is rotatably arranged on the integrated cabinet through a hinge.

5. The fluid delivery device according to claim 1, wherein: integrated cabinet includes the installation department of protrusion both sides, fluid delivery device includes the mounting panel and connects the installation department with damping device between the mounting panel.

6. The fluid delivery device according to claim 5, wherein: the damping means comprises a helical spring.

7. The fluid delivery device according to claim 6, wherein: damping device includes the centre gripping coil spring's first fixed plate and centre gripping coil spring's second fixed plate, wherein first fixed plate is fixed in the mounting panel, the second fixed plate is fixed in the installation department.

8. The fluid delivery device according to claim 7, wherein: the integrated cabinet include with the back wall that the door plant is relative, the installation department is located on the back wall, the mounting panel is located the rear of back wall and with have the clearance between the back wall.

9. The fluid delivery device according to claim 1, wherein: the magnetic coupling part comprises a driving magnetic drive and a driven magnetic drive, a pump head input shaft is arranged on the driven magnetic drive, and the pump head input shaft is connected with the gear mechanism.

Technical Field

The invention relates to a fluid conveying device, in particular to a fluid conveying device arranged in an engine tail gas treatment system.

Background

Disclosure of Invention

The invention aims to provide a fluid conveying device which is high in precision and has a waterproof function.

In order to achieve the purpose, the invention adopts the following technical scheme: a fluid conveying device is used for conveying urea solution in an engine exhaust treatment system and comprises an integrated cabinet, a pump arranged in the integrated cabinet, an inlet pipeline connected with the pump and an outlet pipeline connected with the pump, wherein the pump comprises a motor positioned at the bottom, a pump head positioned at the top and a magnetic coupling part positioned between the motor and the pump head, the magnetic coupling part and the motor are arranged from top to bottom, a U-shaped flow channel and a gear mechanism positioned at the bottommost part of the flow channel are arranged in the pump head, and the integrated cabinet comprises a door plate and an annular sealing part used for sealing the door plate and the corresponding part of the integrated cabinet.

As a further improved technical solution of the present invention, the inlet pipeline and the outlet pipeline are respectively connected to two ends of the flow channel, and the inlet pipeline, the outlet pipeline and the pump head are connected to each other to form an inverted U shape.

As a further improved technical scheme of the invention, the annular sealing element is made of silicon rubber materials.

As a further improved technical scheme of the invention, the door plate is rotatably installed on the integrated cabinet through a hinge.

As a further improved technical scheme of the invention, the integrated cabinet comprises mounting parts protruding from two sides, and the fluid conveying device comprises a mounting plate and a damping device connected between the mounting parts and the mounting plate.

As a further improved technical scheme of the invention, the damping device comprises a spiral spring.

As a further improved technical solution of the present invention, the damping device includes a first fixing plate that clamps the coil spring and a second fixing plate that clamps the coil spring, wherein the first fixing plate is fixed to the mounting plate, and the second fixing plate is fixed to the mounting portion.

As a further improved technical solution of the present invention, the integrated cabinet includes a rear wall opposite to the door panel, the mounting portion is located on the rear wall, and the mounting plate is located behind the rear wall and has a gap with the rear wall.

As a further improved technical solution of the present invention, the magnetic coupling portion includes a driving magnetic drive and a driven magnetic drive, the driven magnetic drive is provided with a pump head input shaft, and the pump head input shaft is connected to the gear mechanism.

Compared with the prior art, the pump head, the magnetic coupling part and the motor in the fluid conveying device are arranged from top to bottom, the U-shaped flow channel and the gear mechanism positioned at the bottommost part of the flow channel are arranged in the pump head, bubbles accumulated in urea solution in the pump body can be eliminated, and the working efficiency of liquid pumping by the pump and the accuracy of delivery metering control are ensured. In addition, the door plate and the corresponding part of the integrated cabinet can be sealed by arranging the annular sealing element, and the waterproof grade is improved.

Drawings

FIG. 1 is a schematic diagram of an engine exhaust treatment system according to the present invention.

Fig. 2 is a perspective view of the fluid delivery device of fig. 1.

Fig. 3 is a front view of fig. 2.

Fig. 4 is a left side view of fig. 2.

Fig. 5 is a front view of the door panel of fig. 3 removed.

Fig. 6 is a cross-sectional view of a motor in the fluid delivery device of the present invention.

Detailed Description

Referring to fig. 1, the present invention discloses an engine exhaust gas treatment system 100, which is applied to exhaust gas treatment of an engine 200. The engine exhaust gas treatment system 100 includes a urea tank 1, a sensor integration 2 connected to the urea tank 1, a filter 3 connected downstream of the sensor integration 2, a fluid delivery device 4 for delivering the urea solution, a common rail 5 connected to the fluid delivery 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, typically in excess of 500 kilowatts. Accordingly, the nozzle 6 is generally provided in plurality. The nozzle 6 is used to inject 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, so that the emission of nitrogen oxides is reduced. In view of the principle of such exhaust gas treatment techniques, which are well known to those skilled in the art, the present invention will not be described in detail herein.

Referring to fig. 2 to 6, the fluid delivery device 4 includes an integrated cabinet 41, a pump 42 installed in the integrated cabinet 41, an inlet pipeline 43 located at one side of the pump 42, an outlet pipeline 44 located at the other side of the pump 42, and a controller 45 installed in the integrated cabinet 41.

The integrated cabinet 41 is substantially rectangular parallelepiped, and includes a door panel 411 which can be opened by rotation, a rear wall 412 opposite to the door panel 411, a mounting plate 413 which is located behind the rear wall 412 and has a gap with the rear wall 412, and a shock absorbing device 414.

In the illustrated embodiment of the present invention, the door 411 is rotatably mounted on the integrated cabinet 41 by a hinge 4111. The cabinet 41 further includes a ring-shaped sealing member 415 for sealing the door 411 with a corresponding portion of the cabinet 41. Preferably, the annular seal 415 is made of a silicone rubber material. By means of the arrangement, the waterproof grade of the fluid conveying device 4 can be improved, and the IP67 is achieved. In addition, the silicone rubber material can resist high temperatures, thereby enabling the fluid transport device 4 to be suitable for use in more severe environments, particularly high temperature environments.

The integration cabinet 41 includes a mounting portion 416 protruding from both sides. In the illustrated embodiment of the invention, the mounting portions 416 are located on either side of the rear wall 412. The damper 414 is connected between the mounting plate 413 and the mounting portion 416.

The damper 414 includes a coil spring 4141, a first fixing plate 4142 holding the coil spring 4141, and a second fixing plate 4143 holding the coil spring 4141, wherein the first fixing plate 4142 is fixed to the mounting plate 413, and the second fixing plate 4143 is fixed to the mounting portion 416. With the arrangement, the shock from the outside can be absorbed, and the durability of the product is improved.

Referring to fig. 5 and 6, in the illustrated embodiment of the present 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 a magnetic coupling 423 between the motor 421 and the pump head 422. Referring to fig. 6, the motor 421 includes a motor output shaft 4211. A U-shaped urea flow passage 4221 and a gear mechanism 4222 located at the bottommost portion of the urea flow passage 4221 are provided in the pump head 422. The magnetic coupling 423 includes a driving magnetic drive 4231 and a driven magnetic drive 4232. The motor shaft 4211 is connected and fixed with the active magnetic drive 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 with the gear mechanism 4222.

During operation, the motor 421 is powered on, the motor output shaft 4211 drives the active magnetic drive 4231 to rotate, then the active magnetic drive 4231 drives the pump head input shaft 4233 to rotate, and the pump head input shaft 4233 further drives the gear mechanism 4222 to rotate, so that the urea solution flows in the direction of an arrow, and the outlet pressure of the urea solution is increased. In the illustrated embodiment of the present invention, since the gear mechanism 4222 is located at the bottommost portion of the urea flow passage 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 the liquid and the accuracy of the delivery metering control.

The inlet tubing 43, the outlet tubing 44 and the pump head 422 are interconnected to form an inverted U-shape.

In addition, the above embodiments are only used for illustrating the invention and not for limiting the technical solutions described in the invention, and it should be understood by those skilled in the art that, for example, "front and back through" means through before installing other components, and further, for example, directional descriptions such as "front", "back", "left", "right", "upper", "lower", etc. are provided.