CN210013739U - Gas-liquid one-way mixing device for urea pump - Google Patents

Abstract

The utility model discloses a one-way mixing arrangement of gas-liquid for urea pump, which comprises a housin, the inside of casing is provided with the hybrid chamber, the one end of hybrid chamber is provided with gas feed, the other end of hybrid chamber is provided with mixed liquid export, seted up on the casing with the urea import of hybrid chamber intercommunication, the bottom of urea import is provided with the guide plate, the inside of guide plate is provided with a plurality of water conservancy diversion holes, the inside one end of hybrid chamber is provided with the check valve, the check valve comprises disk seat and piston, the piston is close to the one end of mixed liquid export is provided with the steel ball, the piston is close to gas feed's one end is provided with the retaining ring, the piston side is close to the one end of retaining ring is provided with a plurality of pressure. Has the advantages that: can reduce, get rid of and pile up the urea crystallization in the mixing chamber inside, effectively guarantee the normal work of urea pump.

Description

Gas-liquid one-way mixing device for urea pump

Technical Field

The utility model relates to a urea pump technical field particularly, relates to an one-way mixing arrangement of gas-liquid for urea pump.

Background

At present, the rapid development of motor vehicles is accompanied by serious atmospheric pollution, and the motor vehicles have the characteristics of regional composite type. The air pollution of a plurality of large cities is changed from soot type pollution to soot and motor vehicle composite type pollution, and a few extra-large cities obviously show photochemical smog type air pollution. Therefore, the research on the technology of controlling the exhaust emissions of diesel vehicles is extremely important and urgent, and the diesel engine is the main power of the diesel vehicles in view of the development of commercial vehicles. Exhaust aftertreatment systems for emission control in stage IV have primarily adopted the route of SCR aftertreatment systems. Scr (selective Catalyst reduction) refers to a catalytic reduction device installed in an exhaust system of a diesel vehicle for catalytically reducing NOx in diesel engine exhaust to N2 and O2, and urea aqueous solution is selected as a reducing agent, injected into an exhaust pipe upstream of a Catalyst, and hydrolyzed under the action of exhaust gas temperature and gas flow to produce CO2 and ammonia gas. The SCR aftertreatment system uses urea. The urea is prone to crystallization. Especially urea is more likely to crystallize when mixed with gases. The mixing cavity for mixing the urea solution and the gas, the inlet and outlet of the mixing cavity or the nozzle are easy to be blocked, and the system can not normally operate.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

To the problem among the correlation technique, the utility model provides an one-way mixing arrangement of gas-liquid for urea pump to overcome the above-mentioned technical problem that current correlation technique exists.

Therefore, the utility model discloses a specific technical scheme as follows:

the utility model provides a one-way mixing arrangement of gas-liquid for urea pump, includes the casing, the inside of casing is provided with the hybrid chamber, the one end of hybrid chamber is provided with gas feed, the other end of hybrid chamber is provided with mixed liquid outlet, seted up on the casing with the urea import of hybrid chamber intercommunication, the bottom of urea import is provided with the guide plate, the inside of guide plate is provided with a plurality of water conservancy diversion holes, the inside one end of hybrid chamber is provided with the check valve, the check valve comprises disk seat and piston, the piston is close to the one end of mixed liquid outlet is provided with the steel ball, the piston is close to gas feed's one end is provided with the retaining ring, the piston side is close to the one end of retaining ring is provided with a.

Furthermore, an annular groove I and an annular groove II are sequentially arranged on the outer side edge of the valve seat respectively, a sealing ring I matched with the shell is arranged inside the annular groove I, and a sealing ring II matched with the shell is arranged inside the annular groove II.

Furthermore, a plurality of strip-shaped limiting pieces matched and connected with the valve seat are arranged in the middle of the side edge of the piston.

Furthermore, the contact end of the valve seat and the piston is of an arc-shaped structure, and a sealing gasket is arranged at the contact end of the valve seat and the piston.

Further, the retainer ring is of an arc-shaped structure.

Further, the urea inlet is of an inclined structure.

The utility model has the advantages that: through setting up the hybrid chamber to can realize the gas-liquid mixture, through setting up guide plate and water conservancy diversion hole, thereby can make the urea dispersion, make the better mixture of urea and gas, through setting up the check valve, thereby can realize gaseous one-way flow, avoid mixing the liquid refluence, the device can reduce, get rid of and pile up the urea crystallization in the hybrid chamber inside, effectively guarantees the normal work of urea pump.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is one of the schematic structural diagrams of a gas-liquid one-way mixing device for a urea pump according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of a gas-liquid one-way mixing device for a urea pump according to an embodiment of the present invention.

In the figure:

1. a housing; 2. a mixing chamber; 3. a gas inlet; 4. a mixed liquid outlet; 5. a urea inlet; 6. a baffle; 7. a flow guide hole; 8. a one-way valve; 9. a valve seat; 10. a piston; 11. a steel ball; 12. a retainer ring; 13. a pressure regulating spring; 14. a first annular groove; 15. a second annular groove; 16. a first sealing ring; 17. a second sealing ring; 18. a strip-shaped limiting sheet; 19. a gasket seal.

Detailed Description

For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.

According to the utility model discloses an embodiment provides a one-way mixing arrangement of gas-liquid for urea pump.

The first embodiment is as follows:

as shown in fig. 1-2, the gas-liquid one-way mixing device for a urea pump according to the embodiment of the present invention comprises a housing 1, a mixing cavity 2 is arranged in the shell 1, one end of the mixing cavity 2 is provided with a gas inlet 3, the other end of the mixing cavity 2 is provided with a mixed liquid outlet 4, the shell 1 is provided with a urea inlet 5 communicated with the mixing cavity 2, a guide plate 6 is arranged at the bottom end of the urea inlet 5, a plurality of guide holes 7 are arranged inside the guide plate 6, one end of the interior of the mixing cavity 2 is provided with a one-way valve 8, the one-way valve 8 is composed of a valve seat 9 and a piston 10, a steel ball 11 is arranged at one end of the piston 10 close to the mixed liquid outlet 4, a retainer ring 12 is arranged at one end of the piston 10 close to the gas inlet 3, and one end of the side edge of the piston 10, which is close to the retainer ring 12, is provided with a plurality of pressure regulating springs 13.

The specific arrangement and function of the baffle 6 and the baffle holes 7 will be described in detail below.

As shown in fig. 1, the guide plate 6 is located at the bottom end of the urea inlet 5, the guide holes 7 are located inside the guide plate 6, and by arranging the guide plate 6 and the guide holes 7, urea can be dispersed and flow into the mixing chamber 2, so that urea and gas can be sufficiently mixed.

By means of the above-mentioned technical scheme, through setting up mixing chamber 2 to can realize the gas-liquid mixture, through setting up guide plate 6 and water conservancy diversion hole 7, thereby can make the urea dispersion, make the better mixture of urea and gas, through setting up check valve 8, thereby can realize gaseous one-way flow, avoid mixing the liquid refluence, the device can reduce, get rid of and pile up the urea crystallization in the mixing chamber inside, effectively guarantees the normal work of urea pump.

Example two:

as shown in fig. 1-2, a first annular groove 14 and a second annular groove 15 are sequentially formed in the outer side edge of the valve seat 9, a first sealing ring 16 matched with the housing 1 is arranged inside the first annular groove 14, a second sealing ring 17 matched with the housing 1 is arranged inside the second annular groove 15, a plurality of strip-shaped limiting pieces 18 matched and connected with the valve seat 9 are arranged in the middle of the side edge of the piston 10, the contact end of the valve seat 9 and the piston 10 is of an arc-shaped structure, a sealing gasket 19 is arranged at the contact end of the valve seat 9 and the piston 10, the retainer ring 12 is of an arc-shaped structure, and the urea inlet 5 is of an inclined structure.

As can be seen from fig. 1, a first annular groove 14 and a second annular groove 15 are sequentially formed in the outer side edge of the valve seat 9, a first sealing ring 16 matched with the housing 1 is arranged inside the first annular groove 14, a second sealing ring 17 matched with the housing 1 is arranged inside the second annular groove 15, a plurality of strip-shaped limiting pieces 18 matched and connected with the valve seat 9 are arranged in the middle of the side edge of the piston 10, a sealing gasket 19 is arranged at the contact end of the valve seat 9 and the piston 10, and the design of the first annular groove 14, the second annular groove 15, the first sealing ring 16, the second sealing ring 17, the strip-shaped limiting pieces 18 and the sealing gasket 19 is relatively conventional and therefore will not be described in detail.

To sum up, with the help of the utility model discloses an above-mentioned technical scheme is through setting up mixing chamber 2 to can realize the gas-liquid mixture, through setting up guide plate 6 and water conservancy diversion hole 7, thereby can make the urea dispersion, make urea and gaseous better mixture, through setting up check valve 8, thereby can realize gaseous one-way flow, avoid mixed liquid refluence, the device can reduce, get rid of and pile up the urea crystallization in mixing chamber inside, effectively guarantees the normal work of urea pump.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (6)

1. The gas-liquid one-way mixing device for the urea pump is characterized by comprising a shell (1), wherein a mixing cavity (2) is arranged inside the shell (1), a gas inlet (3) is formed in one end of the mixing cavity (2), a mixed liquid outlet (4) is formed in the other end of the mixing cavity (2), a urea inlet (5) communicated with the mixing cavity (2) is formed in the shell (1), a guide plate (6) is arranged at the bottom end of the urea inlet (5), a plurality of guide holes (7) are formed in the guide plate (6), a one-way valve (8) is arranged at one end inside the mixing cavity (2), the one-way valve (8) is composed of a valve seat (9) and a piston (10), a steel ball (11) is arranged at one end, close to the mixed liquid outlet (4), of the piston (10) is provided with a retainer ring (12) at one end, close to the gas inlet (3), and one end of the side edge of the piston (10) close to the retainer ring (12) is provided with a plurality of pressure regulating springs (13).

2. The gas-liquid one-way mixing device for the urea pump is characterized in that a first annular groove (14) and a second annular groove (15) are sequentially arranged on the outer side edge of the valve seat (9), a first sealing ring (16) matched with the shell (1) is arranged inside the first annular groove (14), and a second sealing ring (17) matched with the shell (1) is arranged inside the second annular groove (15).

3. The gas-liquid one-way mixing device for the urea pump is characterized in that a plurality of strip-shaped limiting pieces (18) which are matched and connected with the valve seat (9) are arranged in the middle of the side edge of the piston (10).

4. A gas-liquid one-way mixing device for a urea pump according to claim 1, characterized in that the contact end of the valve seat (9) and the piston (10) is of an arc structure, and the contact end of the valve seat (9) and the piston (10) is provided with a sealing gasket (19).

5. The unidirectional gas-liquid mixing device for the urea pump as claimed in claim 1, characterized in that the retainer ring (12) has an arc-shaped structure.

6. A gas-liquid one-way mixing device for a urea pump according to claim 1, characterized in that said urea inlet (5) is of an inclined structure.

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