CN213574294U

CN213574294U - Vehicle-mounted double-diaphragm urea pump

Info

Publication number: CN213574294U
Application number: CN202022298254.XU
Authority: CN
Inventors: 张志强; 王亚林; 胡保闯
Original assignee: Yuetai Power Technology Changzhou Co ltd
Current assignee: Yuetai Power Technology Changzhou Co ltd
Priority date: 2020-10-15
Filing date: 2020-10-15
Publication date: 2021-06-29
Anticipated expiration: 2030-10-15

Abstract

The utility model provides an on-vehicle two unfamiliar urea pump, this on-vehicle two unfamiliar urea pump include urea pump and connecting pipe, the urea pump includes the shell and is located pump body in the shell, be equipped with into pipe and exit tube on the shell, the entrance point of the pump body is equipped with the import pipe, the exit end of the pump body with the exit tube is connected, the import pipe with advance a tub fixed connection, the import pipe with advance to be equipped with the filter screen between the pipe, be equipped with in the connecting pipe the disk seat and with disk seat assorted valve ball, the valve ball is located the disk seat is close to one side of urea pump, be equipped with the edge on the connecting pipe is inside connecting pipe axial extension's guide bar, be equipped with on the guide bar and be used for with the valve ball compresses tightly pressure. Compare the urea pump in prior art, the utility model discloses an on-vehicle two unfamiliar urea pump is difficult to the jam, and through set up disk seat and valve ball in the connecting pipe, helps preventing that urea solution is palirrhea.

Description

Vehicle-mounted double-diaphragm urea pump

Technical Field

The utility model belongs to the technical field of the urea pump, especially, relate to an on-vehicle two unfamiliar urea pump.

Background

In order to reduce the environmental pollution caused by the exhaust gas discharged by the engine, a set of device for treating pollutants such as nitrogen oxides and the like is connected to the exhaust pipe of the engine, and the treatment of the pollutants in the exhaust gas is mainly realized by an SCR (selective catalytic reduction) technology, a DOC (catalyst controlled oxidation) technology and the like. The urea pump is an important component of SCR (selective catalytic reduction) technology and DOC technology, and has the main functions of pumping urea solution in a urea box, keeping a certain pressure and then conveying the urea solution to an injection unit to meet the requirements of an injection metering system on flow and pressure.

In the using process of the urea solution, the blockage and damage of the urea pump are easily caused due to the insoluble matters and excessive impurities in the urea solution, and the dust in the air can influence the urea pump to different degrees. In addition, impurities can easily enter the urea pump, so that the urea pump is polluted and stuck, the SCR box is crystallized, the vehicle is limited in torsion, and the normal use of a user is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an on-vehicle two unfamiliar urea pump to solve the technical problem that the urea pump among the prior art is blockked up by impurity easily.

The utility model discloses a technical scheme of on-vehicle two unfamiliar urea pumps is:

the utility model provides an on-vehicle two unfamiliar urea pump, includes urea pump and connecting pipe, the urea pump includes the shell and is located the pump body in the shell, be equipped with into pipe and exit tube on the shell, the entrance point of the pump body is equipped with the import pipe, the exit end of the pump body with exit tube connected, the import pipe with advance a tub fixed connection, the import pipe with advance to be equipped with the filter screen between the pipe, be equipped with the disk seat in the connecting pipe and with disk seat assorted valve ball, the valve ball is located the disk seat is close to one side of urea pump, be equipped with the edge on the connecting pipe is inside connecting pipe axial extension's guide rod, be equipped with on the guide rod be used for with the valve ball compresses tightly pressure spring on.

As a further improvement to the above technical solution, the inlet pipe includes a hard pipe and a hose connected to an end of the hard pipe, the hose is connected to the inlet pipe through a flange, and the filter screen is clamped and fixed by the hose and the flange between the inlet pipe.

As a further improvement to the above technical solution, the hose is in a bowl-shaped structure.

As a further improvement to the above technical solution, the housing includes a housing and a housing cover, the housing cover is fixedly connected to one end of the housing through a bolt, a partition plate for partitioning the housing into a first cavity and a second cavity is disposed in the housing, the pump body is disposed in the second cavity, and one end of the inlet pipe extends into the first cavity.

As a further improvement to the above technical solution, the inlet pipe is fixedly connected to the housing cover.

As a further improvement to the technical scheme, the guide rod is L-shaped, the upper end of the vertical section of the guide rod is fixed on the inner wall of the connecting pipe through a bolt, the pressure spring is sleeved on the horizontal section of the guide rod, one end of the pressure spring is fixedly connected with the valve ball, and the other end of the pressure spring is abutted to the vertical section of the guide rod.

The utility model provides an on-vehicle two unfamiliar urea pumps compares in prior art, and its beneficial effect lies in:

the utility model discloses an on-vehicle two unfamiliar urea pumps use, urea solution promote the valve ball to the direction motion of keeping away from the disk seat, and urea solution gets into in the connecting pipe to get into the admission pipe through the connecting pipe, in urea solution gets into the admission pipe through the filter screen, and at this in-process, the filter screen filters the impurity in the urea solution, and the urea solution after the filter screen filters gets into in the pump body. Compare the urea pump in prior art, the utility model discloses an on-vehicle two unfamiliar urea pump is difficult to the jam, and through set up disk seat and valve ball in the connecting pipe, helps preventing that urea solution is palirrhea.

The utility model discloses an among the on-vehicle two unfamiliar urea pumps, the connecting pipe includes hard tube and hose, and the hose passes through the flange with the import pipe and fixes, and the filter screen is pressed from both sides tightly between the flange of hose tip and the flange of import pipe tip. The fixation is firmer, and the filter screen replacement is more convenient.

The utility model discloses an among the on-vehicle two unfamiliar urea pumps, through setting the shell to casing and cap, and set up the baffle in the casing, be convenient for install urea pump and filter screen.

Drawings

FIG. 1 is a schematic structural diagram of a vehicle-mounted double-diaphragm urea pump of the present invention;

FIG. 2 is a schematic diagram of the internal structure of the vehicle-mounted double-diaphragm urea pump of the present invention;

fig. 3 is an enlarged view at a in fig. 2.

In the figure: 1. a housing; 2. a shell cover; 3. feeding a pipe; 4. discharging a pipe; 5. a connecting pipe; 6. a pump body; 7. an inlet pipe; 8. a partition plate; 9. a hose; 10. filtering with a screen; 11. a valve seat; 12. a valve ball; 13. a guide rod; 14. and (5) pressing a spring.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The concrete embodiment of the vehicle-mounted double-diaphragm urea pump of the utility model, as shown in figures 1 to 3, comprises a urea pump and a connecting pipe 5, the urea pump comprises a shell and a pump body 6 positioned in the shell, wherein the shell is provided with an inlet pipe 3 and an outlet pipe 4, an inlet pipe 7 is arranged at the inlet end of the pump body 6, the outlet end of the pump body 6 is connected with the outlet pipe 4, the inlet pipe 7 is fixedly connected with the inlet pipe 3, a filter screen 10 is arranged between the inlet pipe 7 and the inlet pipe 3, a valve seat 11 and a valve ball 12 matched with the valve seat 11 are arranged in the connecting pipe 5, the valve ball 12 is positioned on one side of the valve seat 11 close to the urea pump, a guide rod 13 extending along the axial direction of the connecting pipe 5 is arranged inside the connecting pipe 5, a compression spring 14 for pressing the valve ball 12 against the valve seat 11 is arranged on the guide rod 13.

Further, the inlet pipe 7 comprises a hard pipe and a hose 9 connected to the end of the hard pipe, the hose 9 is connected to the inlet pipe 7 through a flange, and the filter screen 10 is clamped and fixed by the flange between the hose 9 and the inlet pipe 7.

Further, the hose 9 is of a bowl-shaped structure.

Further, the shell includes casing 1 and cap 2, cap 2 passes through bolt fixed connection in the one end of casing 1, be equipped with in the casing 1 and be used for with casing 1 separates the baffle 8 that is first cavity and second cavity, the pump body 6 sets up in the second cavity, the one end of import pipe 7 is deepened to in the first cavity.

Further, the inlet pipe 3 is fixedly connected to the shell cover 2.

Further, guide rod 13 is L shape, the vertical section upper end of guide rod 13 is fixed through the bolt on the 5 inner walls of connecting pipe, pressure spring 14 suit is in on the horizontal segment of guide rod 13, the one end of pressure spring 14 with valve ball 12 fixed connection, the other end with the vertical section butt of guide rod 13.

The utility model discloses a theory of operation of on-vehicle two unfamiliar urea pumps does: during the use, urea solution promotes valve ball 12 to the direction motion of keeping away from disk seat 11, and in urea solution got into connecting pipe 5 to in entering pipe 3 through connecting pipe 5, urea solution got into import pipe 7 through filter screen 10, and in this process, filter screen 10 filtered the impurity in the urea solution, and the urea solution after filter screen 10 filters gets into the pump body 6.

The utility model provides an on-vehicle two unfamiliar urea pumps compares the urea pump in prior art, has following advantage: the utility model discloses an on-vehicle two unfamiliar urea pumps are difficult to block up, and through set up disk seat 11 and valve ball 12 in connecting pipe 5, help preventing that the urea solution is palirrhea.

The utility model discloses an among the on-vehicle two unfamiliar urea pumps, connecting pipe 5 includes hard tube and hose 9, and hose 9 passes through the flange with import pipe 7 and fixes, and filter screen 10 is pressed from both sides tightly between the flange of 9 tip of hose and the flange of import pipe 7 tip. The fixation is firmer and the replacement of the filter screen 10 is more convenient.

The utility model discloses an among the on-vehicle two unfamiliar urea pumps, through setting the shell to casing 1 and cap 2, and set up baffle 8 in casing 1, be convenient for install urea pump and filter screen 10.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an on-vehicle two unfamiliar urea pump which characterized in that: including urea pump and connecting pipe, the urea pump includes the shell and is located the pump body in the shell, be equipped with into pipe and exit tube on the shell, the entrance point of the pump body is equipped with the import pipe, the exit end of the pump body with the exit tube is connected, the import pipe with advance a tub fixed connection, the import pipe with advance to be equipped with the filter screen between the pipe, be equipped with the disk seat in the connecting pipe and with disk seat assorted valve ball, the valve ball is located the disk seat is close to one side of urea pump, be equipped with the edge on the connecting pipe is inside connecting pipe axial extension's guide rod, be equipped with on the guide rod be used for with the valve ball compresses tightly pressure spring on the disk seat.

2. The on-board dual diaphragm urea pump of claim 1, wherein: the import pipe includes the hard tube and connects the hose of hard tube tip, the hose pass through the flange with import union coupling, the filter screen quilt the hose and the flange between the import pipe is pressed from both sides tightly fixedly.

3. The on-board dual diaphragm urea pump of claim 2, wherein: the hose is of a bowl-shaped structure.

4. The on-board dual diaphragm urea pump of claim 1, wherein: the shell comprises a shell body and a shell cover, wherein the shell cover is fixedly connected with one end of the shell body through a bolt, a partition plate used for partitioning the shell body into a first cavity and a second cavity is arranged in the shell body, the pump body is arranged in the second cavity, and one end of the inlet pipe penetrates into the first cavity.

5. The on-board dual diaphragm urea pump of claim 4, wherein: the inlet pipe is fixedly connected to the shell cover.

6. The on-board dual diaphragm urea pump of claim 1, wherein: the guide rod is L shape, the vertical section upper end of guide rod is passed through the bolt fastening and is in on the connecting tube inner wall, the pressure spring suit is in on the horizontal segment of guide rod, the one end of pressure spring with valve ball fixed connection, the other end with the vertical section butt of guide rod.