CN210372128U - Electromagnetic directional valve of urea pump assembly - Google Patents
Electromagnetic directional valve of urea pump assembly Download PDFInfo
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- CN210372128U CN210372128U CN201921227322.4U CN201921227322U CN210372128U CN 210372128 U CN210372128 U CN 210372128U CN 201921227322 U CN201921227322 U CN 201921227322U CN 210372128 U CN210372128 U CN 210372128U
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Abstract
The utility model relates to a be applicable to the solenoid operated valve on the urea pump assembly more. This kind of urea pump assembly solenoid directional valve is including the valve body, its characterized in that: a left sealing cavity and a right sealing cavity are arranged in the valve body; the valve body is provided with a pump inlet interface communicated with the inlet end of the urea pump, a pump outlet interface communicated with the outlet end of the urea pump, a liquid inlet interface communicated with the urea box and a liquid outlet interface communicated with the urea injection assembly; the left sealing cavity is communicated with the liquid inlet interface, and the right sealing cavity is communicated with the liquid outlet interface. The reversing valve of the urea pump assembly can control the direction of fluid by driving the shifting sheet to swing in the valve core through the actuator, thereby realizing the switching between liquid outlet and backflow of urea. The reversing valve has the advantages of reasonable structure, stable performance and easy maintenance.
Description
Technical Field
The utility model relates to a urea pump assembly, concretely relates to be applied to switching-over valve on urea pump assembly.
Background
With the improvement of national emission requirements, more and more diesel vehicles need to be additionally provided with an SCR system, and urea is utilized to neutralize oxynitride so as to reduce the pollution of the diesel vehicles to the environment. The core component of the SCR system is a urea pump assembly, and the general urea pump assembly comprises a shell, a pressure sensor, a throttle valve, a reversing valve and a pump core. The urea pump assembly pumps urea in the urea box to the urea injection unit, and the urea injection unit sprays the urea to be neutralized with oxynitride in automobile exhaust. However, the urea solution may be frozen when the temperature is lower than-11, which may cause the urea supply system to fail to work normally, so after the urea injection unit finishes injecting urea, the urea in the urea supply system needs to be discharged back to the urea tank, and the switching operation of the urea flow direction is completed by the switching valve. However, the reversing valve has different structures and models in different application scenes, and also has different structures when being applied to the urea pump assembly, and a reversing valve more suitable for the urea pump assembly is urgently needed in the market at present.
Disclosure of Invention
In view of the deficiencies in the prior art, the utility model discloses the innovation provides a switching-over valve more is applicable to on the urea pump assembly.
The reversing valve of the urea pump assembly comprises a valve body, and is characterized in that: a left sealing cavity and a right sealing cavity are arranged in the valve body; the valve body is provided with a pump inlet interface communicated with the inlet end of the urea pump, a pump outlet interface communicated with the outlet end of the urea pump, a liquid inlet interface communicated with the urea box and a liquid outlet interface communicated with the urea injection assembly; the left sealing cavity is communicated with the liquid inlet interface, and the right sealing cavity is communicated with the liquid outlet interface; the upper part of the left sealing cavity is provided with a left pump inlet hole which is communicated with a pump inlet interface, the lower part of the right sealing cavity is provided with a right pump inlet hole which is communicated with the pump inlet interface; the lower part of the left sealing cavity is provided with a left liquid outlet, the left liquid outlet is communicated with a pump outlet, the upper part of the right sealing cavity is provided with a right liquid outlet, and the right liquid outlet is communicated with the pump outlet; the left side is equipped with the left case that is used for blockking up left side and advances pump hole or left play liquid hole in the sealed intracavity in a left side, be equipped with the right case that is used for blockking up right side and advances pump hole or right play liquid hole in the sealed intracavity in the right side, left side case and right valve core are connected on the plectrum, the plectrum is connected with the executor that the drive plectrum reciprocated.
The valve body is formed by assembling an upper valve body and a lower valve body; the lower surface of the upper valve body is provided with an upper left groove and an upper right groove, the left pump inlet hole is positioned in the upper left groove, and the right liquid outlet hole is positioned in the upper right groove; the upper surface of the lower valve body is provided with a left lower groove and a right lower groove, the left liquid outlet hole is positioned in the left lower groove, and the right pump inlet hole is positioned in the right lower groove; a left sealing cavity is formed between the upper left groove and the lower left groove through a left sealing ring, and a right sealing cavity is formed between the upper right groove and the lower right groove through a right sealing ring.
The lower valve body is provided with a first backflow pipe and a first backflow interface which are communicated with each other, and a second backflow pipe and a second backflow interface which are communicated with each other.
The left sealing ring and the right sealing ring are arranged on the stirring sheet, the left sealing ring surrounds the left valve core, and the right sealing ring surrounds the right valve core.
The actuator comprises an electromagnetic valve body, an electromagnetic valve core and an armature, the electromagnetic valve body is provided with a telescopic groove, the armature can be arranged in the telescopic groove of the electromagnetic valve body in a vertically moving mode, the upper end of the armature is connected with a shifting piece seat used for clamping a shifting piece, a reset spring is arranged between the shifting piece seat and the electromagnetic valve body, an upper blocking piece and a lower supporting point used for vertically limiting the shifting piece are arranged on the shifting piece seat, and a clamping block used for clamping the shifting piece is arranged between the upper blocking piece and the lower supporting point.
The front end of the upper stopper is provided with a front stopper face inclined upwards, and the rear end of the upper stopper is provided with a rear stopper face inclined upwards.
The fixture block is positioned on the upper blocking piece, a connecting hole is formed in the upper blocking piece, a connecting column is arranged on the shifting sheet seat, the upper blocking piece is sleeved on the connecting column through the connecting hole, a limiting surface is arranged at the upper end of the shifting sheet seat, and a supporting spring is arranged between the limiting surface and the upper blocking piece.
The lower end of the shifting piece seat is provided with a plurality of buckles, the surface of the armature is provided with a buckle groove, and the buckles of the shifting piece seat are buckled in the buckle groove.
An upper sliding bearing is arranged in the telescopic groove of the electromagnetic valve body, and the armature is arranged in the upper sliding bearing.
The solenoid valve iron core sets up in telescopic slot bottom, be equipped with down sliding bearing on the solenoid valve iron core, the lower extreme of armature is needle portion, the needle portion matching of armature sets up in slide bearing down.
According to the utility model provides a pair of switching-over valve of urea pump assembly just can control the fluid direction through the swing of executor drive plectrum in the case to realize that urea switches between going out liquid and backward flow. The reversing valve has the advantages of reasonable structure, stable performance and easy maintenance.
Drawings
FIG. 1 is a perspective view of a valve body;
FIG. 2 is an exploded view of the valve body 1;
FIG. 3 is an exploded view of the valve body 2;
FIG. 4 is a schematic diagram of the normal spraying operation of the present invention;
FIG. 5 is a schematic diagram of the operation of the present invention during reflow;
FIG. 6 is a schematic structural view of an actuator;
FIG. 7 is a partial view of the actuator;
fig. 8 is a schematic structural view of the pick.
Detailed Description
As shown in fig. 1 and fig. 2, the reversing valve of the urea pump assembly includes a valve body 1, and a left sealing chamber B1 and a right sealing chamber B2 are arranged in the valve body 1; the valve body 1 is provided with a pump inlet interface 10 (the pump inlet interface 10 is communicated with the inlet end of the urea pump C) which is communicated with the inlet end of the urea pump C, a pump outlet interface 11 (the pump outlet interface 11 is communicated with the outlet end of the urea pump C) which is communicated with the outlet end of the urea pump C, a liquid inlet interface 12 (the liquid inlet interface 12 is communicated with the urea tank A) which is communicated with the urea tank A, and a liquid outlet interface 13 (the liquid outlet interface 13 is communicated with the urea injection assembly D) which is communicated with the urea injection assembly D; wherein, the left sealed cavity B1 is communicated with the liquid inlet interface 12, and the right sealed cavity B2 is communicated with the liquid outlet interface 13; a left pump inlet hole 14 is formed in the upper portion of the left sealing cavity B1, the left pump inlet hole 14 is communicated with the pump inlet interface 10, a right pump inlet hole 17 is formed in the lower portion of the right sealing cavity B2, and the right pump inlet hole 17 is communicated with the pump inlet interface 10; the lower part of the left sealing cavity B1 is provided with a left liquid outlet 16, the left liquid outlet 16 is communicated with the pump outlet 11, the upper part of the right sealing cavity B2 is provided with a right liquid outlet 15, and the right liquid outlet 15 is communicated with the pump outlet 11; in addition, a left valve core E1 for blocking the left pump inlet 14 or the left liquid outlet 16 is arranged in the left sealed cavity B1, a right valve core E2 for blocking the right pump inlet 17 or the right liquid outlet 15 is arranged in the right sealed cavity B2, the left valve core E1 and the right valve core E2 are both connected to a shifting piece 2, and the shifting piece 2 is connected with an actuator 3 for driving the shifting piece 2 to move up and down.
The working principle is as follows: as shown in fig. 4, when in a normal liquid spraying state, the actuator 3 drives the moving plate 2 to move down, at this time, the left valve core E1 blocks the left liquid outlet hole 16 at the lower part of the left sealed cavity B1, the right valve core E2 blocks the right pump inlet hole 17 at the lower part of the right sealed cavity B2, urea enters the left sealed cavity B1, then enters the urea pump C through the left pump inlet hole 14 at the upper part of the left sealed cavity B1, and then the urea pump C pumps the urea into the right sealed cavity B2 through the right liquid outlet hole 15 at the upper part of the right sealed cavity B2, and finally flows into the urea injection assembly D through the right sealed cavity B2; when urea is sprayed and needs to flow back, as shown in fig. 5, the actuator 3 drives the shifting piece 2 to move upwards, at this time, the left valve core E1 blocks the left pump inlet 14 at the upper part of the left sealed cavity B1, the right valve core E2 blocks the right liquid outlet 15 at the upper part of the right sealed cavity B2, urea in the urea spraying assembly D flows back into the right sealed cavity B2, then flows into the urea pump C through the right pump inlet 17 at the lower part of the right sealed cavity B2, and then the urea pump C pumps the urea into the left sealed cavity B1 through the left liquid outlet 16 at the lower part of the left sealed cavity B1 and finally flows into the urea tank a. By the reversing valve, the urea pump C can realize the reversing of the fluid under the condition of not changing the direction of the pump.
As shown in fig. 2 and 3, in order to facilitate manufacturing the above-mentioned reversing valve, the valve body 1 of the present invention is assembled by an upper valve body B3 and a lower valve body B4; the lower surface of the upper valve body B3 is provided with a left upper groove B31 and a right upper groove B32, the left pump inlet hole 14 is positioned in the left upper groove B31, and the right liquid outlet hole 15 is positioned in the right upper groove B32; the upper surface of the lower valve body B4 is provided with a left lower groove B41 and a right lower groove B42, the left liquid outlet hole 16 is positioned in the left lower groove B41, and the right pump inlet hole 17 is positioned in the right lower groove B42; a left sealing cavity B1 is formed between the left upper groove B31 and the left lower groove B41 by arranging a left sealing ring 21, and a right sealing cavity B2 is formed between the right upper groove B32 and the right lower groove B42 by arranging a right sealing ring 22.
And for communicating last valve body B3 with lower valve body B4, the utility model discloses be equipped with communicating first backward flow pipe B44 and first backward flow interface B43 and communicating second backward flow pipe B46 and second backward flow interface B45 on lower valve body B4, be equipped with on last valve body B3 with the communicating first backward flow takeover B33 of pump inlet interface 10 and go out the communicating second backward flow takeover B34 of pump interface 11, first backward flow takeover B33 is sealed to be established in first backward flow interface B43, second backward flow takeover B34 is established in second backward flow interface B45.
As shown in fig. 8, the left sealing ring 21 and the right sealing ring 22 of the present invention are both disposed on the pick 2, the left sealing ring 21 surrounds the left valve body E1, and the right sealing ring 22 surrounds the right valve body E2. Because the left sealing ring 21 and the right sealing ring 22 are both arranged on the shifting piece 2, when the shifting piece 2 swings up and down, the left sealing ring 21 and the right sealing ring 22 move up and down along with the shifting piece, so that the left sealing ring 21 and the right sealing ring 22 can be attached to a through hole at the lower part or a through hole at the lower part, and a better sealing effect is achieved.
As shown in fig. 6, the actuator 3 includes a solenoid valve body 31, a solenoid valve core 38, and an armature 32, wherein the solenoid valve body 31 has an expansion slot, the armature 32 is disposed in the expansion slot of the solenoid valve body 31 so as to be movable up and down, and the solenoid valve core 38 is disposed at the bottom of the expansion slot. The coil inside the solenoid valve body 31 is energized to generate a magnetic field, the solenoid valve core 38 generates a magnetic force, and the solenoid valve core 38 drives the armature 32 to move in the telescopic slot.
In order to drive the shifting piece 2 (see the shifting piece 2 of fig. 8), the upper end of the armature 32 is connected with a shifting piece seat 35 for clamping the shifting piece 2, and a return spring 34 is arranged between the shifting piece seat 35 and the electromagnetic valve body 31. When the electromagnetic valve is electrified, the armature 32 moves downwards in the telescopic groove, so that the armature 32 drives the shifting piece seat 35 to move downwards, and the shifting piece seat 35 drives one end of the shifting piece 2 to move downwards; when the solenoid is de-energized, armature 32 moves upward under the action of return spring 34 and the finger seat 35 carries one end of finger 2 upward. Because plectrum 2 of switching-over valve is around a fulcrum luffing motion on valve body 1, in order to make plectrum seat 35 transmission plectrum 2 swing also around a fulcrum, the utility model discloses be equipped with on plectrum seat 35 and be used for spacing upper stop piece 37 and the lower support point 350 who lives plectrum 2 from top to bottom, and have the fixture block 372 that is used for blocking plectrum 2 between upper stop piece 37 and lower support point 350, as shown in fig. 8, have a recess 20 on plectrum 2, fixture block 372 just blocks in recess 20, prevents that plectrum 2 from removing about, and plectrum 20 is located between upper stop piece 37 and lower support point 350, and when plectrum seat 35 reciprocated, lower support point 350 was as the strong point, and upper stop piece 37 is used in plectrum 2, makes plectrum 2 swing. Through the structure, the assembly is convenient, and only the groove 20 of the plectrum 2 is opposite to the fixture block 372, so that the fixture block 372 is clamped in the groove 20 of the plectrum 2; secondly, the plectrum 2 can be swung around the lower supporting point 350, and the self swinging trend of the plectrum 2 is met, so that the plectrum seat 35 is more stably connected with the plectrum 2.
Since the swing of the pick 2 requires an angle, in order to prevent the swing fulcrum of the pick 2 from moving up and down and ensure a swing angle of the pick 2, as shown in fig. 7, the front end of the upper catch 37 has a front catch surface 370 inclined upward, and the rear end of the upper catch 37 has a rear catch surface 371 inclined upward, the swing angle of the pick 2 can be completely surface-to-surface fitted with the front catch surface 370 or the rear catch surface 371 at maximum because the front catch surface 370 and the rear catch surface 371 are both inclined upward.
In order to facilitate the preparation and the equipment, the utility model discloses a fixture block 372 is located and keeps off 37 on (be integrated into one piece promptly), and is equipped with the connecting hole on keeping off 37 on, is equipped with the spliced pole on plectrum seat 35, and goes up to keep off 37 and just establish on the spliced pole through the connecting hole cover, and is equipped with spacing face 351 in plectrum seat 35 upper end, is equipped with supporting spring 36 between spacing face 351 and last fender 37. That is, the upper stopper 37 is formed by one-time injection molding, and the plectrum seat 35 is also formed by one-time injection molding (the two are difficult to be formed by one-time injection molding due to the structural problem), the upper stopper 37 is sleeved on the connecting column through the connecting hole, and the upper stopper 37 is fixed on the plectrum seat 35 through the supporting spring 36, so that the assembly is very convenient; in addition, the supporting spring 36 can also provide the allowance for the up-and-down movement of the upper stopper 37, so as to ensure that the upper stopper 37 can provide a sufficient swing angle for the pick 2 (the original position of the pick holder 35 cannot ensure that the pick holder 2 is driven to generate a sufficient swing angle, and the supporting spring 36 can provide the allowance for the up-and-down stroke of the pick holder 35). If the upper stopper 37 is damaged, the upper stopper 37 can be detached, so that the replacement is very convenient, and the maintenance cost can be reduced.
In order to detachably connect the pick holder 35 to the armature 32, the lower end of the pick holder 35 has a plurality of fasteners, the surface of the armature 32 is provided with a fastener groove, and the pick holder 35 is fastened in the fastener groove through the fasteners. With this structure, the pick holder 35 is also very easy to assemble and disassemble, facilitating future replacement.
Finally, it is worth mentioning that, in order to maintain the perpendicularity (or the concentricity with the telescopic groove) of the armature 32 moving up and down, the utility model discloses be equipped with the upper sliding bearing 33 in the telescopic groove of the solenoid valve body 31, the armature 32 is just established in the upper sliding bearing 33. In addition, in order to further improve the verticality, the solenoid valve iron core 38 is arranged at the bottom of the telescopic slot, the lower sliding bearing 39 is arranged on the solenoid valve iron core 38, the lower end of the armature 32 is a needle-shaped part 320, and the needle-shaped part 320 of the armature is arranged in the lower sliding bearing 39 in a matching mode.
Claims (10)
1. Urea pump assembly solenoid directional valve, including valve body (1), its characterized in that: a left sealing cavity (B1) and a right sealing cavity (B2) are arranged in the valve body (1); the valve body (1) is provided with a pump inlet interface (10) communicated with the inlet end of the urea pump (C), a pump outlet interface (11) communicated with the outlet end of the urea pump (C), a liquid inlet interface (12) communicated with the urea box (A) and a liquid outlet interface (13) communicated with the urea injection assembly (D); the left sealing cavity (B1) is communicated with the liquid inlet interface (12), and the right sealing cavity (B2) is communicated with the liquid outlet interface (13); the upper part of the left sealing cavity (B1) is provided with a left pump inlet hole (14), the left pump inlet hole (14) is communicated with a pump inlet interface (10), the lower part of the right sealing cavity (B2) is provided with a right pump inlet hole (17), and the right pump inlet hole (17) is communicated with the pump inlet interface (10); the lower part of the left sealing cavity (B1) is provided with a left liquid outlet (16), the left liquid outlet (16) is communicated with the pump outlet interface (11), the upper part of the right sealing cavity (B2) is provided with a right liquid outlet (15), and the right liquid outlet (15) is communicated with the pump outlet interface (11); be equipped with in left sealed chamber (B1) and be used for blockking up left case (E1) of left side pump feed hole (14) or left play liquid hole (16), be equipped with in right sealed chamber (B2) and be used for blockking up right valve core (E2) of right side pump feed hole (17) or right play liquid hole (15), left side case (E1) and right valve core (E2) are connected on plectrum (2), plectrum (2) are connected with executor (3) that drive plectrum (2) reciprocated.
2. The urea pump assembly solenoid directional valve of claim 1, wherein: the valve body (1) is formed by assembling an upper valve body (B3) and a lower valve body (B4); the lower surface of the upper valve body (B3) is provided with a left upper groove (B31) and a right upper groove (B32), the left pump inlet hole (14) is positioned in the left upper groove (B31), and the right liquid outlet hole (15) is positioned in the right upper groove (B32); the upper surface of the lower valve body (B4) is provided with a left lower groove (B41) and a right lower groove (B42), the left liquid outlet hole (16) is positioned in the left lower groove (B41), and the right pump inlet hole (17) is positioned in the right lower groove (B42); a left sealing cavity (B1) is formed between the left upper groove (B31) and the left lower groove (B41) by arranging a left sealing ring (21), and a right sealing cavity (B2) is formed between the right upper groove (B32) and the right lower groove (B42) by arranging a right sealing ring (22).
3. The urea pump assembly solenoid directional valve of claim 2, wherein: be equipped with communicating first backward flow pipe (B44) and first backward flow interface (B43) and communicating second backward flow pipe (B46) and second backward flow interface (B45) on lower valve body (B4), be equipped with on last valve body (B3) and advance pump interface (10) communicating first backward flow takeover (B33) and go out pump interface (11) communicating second backward flow takeover (B34), first backward flow takeover (B33) is sealed to be established in first backward flow interface (B43), second backward flow takeover (B34) is established in second backward flow interface (B45).
4. The urea pump assembly solenoid directional valve of claim 2 or 3, wherein: the left sealing ring (21) and the right sealing ring (22) are arranged on the shifting piece (2), the left valve core (E1) is surrounded by the left sealing ring (21), and the right valve core (E2) is surrounded by the right sealing ring (22).
5. The urea pump assembly solenoid directional valve of claim 1, wherein: the actuator (3) comprises an electromagnetic valve body (31), an electromagnetic valve iron core (38) and an armature (32), the electromagnetic valve body (31) is provided with a telescopic groove, the armature (32) can be arranged in the telescopic groove of the electromagnetic valve body (31) in a vertically movable manner, the upper end of the armature (32) is connected with a plectrum seat (35) used for clamping a plectrum (2), a return spring (34) is arranged between the plectrum seat (35) and the electromagnetic valve body (31), an upper stopper (37) and a lower support point (350) which are used for vertically limiting the plectrum are arranged on the plectrum seat (35), and a clamping block (372) used for clamping the plectrum is arranged between the upper stopper (37) and the lower support point (350).
6. The urea pump assembly solenoid directional valve of claim 5, wherein: the front end of the upper stopper (37) is provided with a front stopping surface (370) which inclines upwards, and the rear end of the upper stopper (37) is provided with a rear stopping surface (371) which inclines upwards.
7. The urea pump assembly solenoid directional valve of claim 6, wherein: the clamping block (372) is located on the upper blocking piece (37), a connecting hole is formed in the upper blocking piece (37), a connecting column is arranged on the plectrum seat (35), the upper blocking piece (37) is sleeved on the connecting column through the connecting hole, a limiting surface (351) is arranged at the upper end of the plectrum seat (35), and a supporting spring (36) is arranged between the limiting surface (351) and the upper blocking piece (37).
8. The urea pump assembly solenoid directional valve of claim 5, wherein: the lower end of the shifting piece seat (35) is provided with a plurality of buckles, the surface of the armature iron (32) is provided with a buckle groove, and the buckles of the shifting piece seat (35) are buckled in the buckle groove.
9. The urea pump assembly solenoid directional valve of claim 5, wherein: an upper sliding bearing (33) is arranged in a telescopic groove of the electromagnetic valve body (31), and the armature iron (32) is arranged in the upper sliding bearing (33).
10. The urea pump assembly solenoid directional valve of claim 5, wherein: solenoid valve iron core (38) are established at the telescoping tank bottom, be equipped with down sliding bearing (39) on solenoid valve iron core (38), the lower extreme of armature (32) is needle portion (320), needle portion (320) matching of armature (32) sets up in slide bearing (39) down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921227322.4U CN210372128U (en) | 2019-07-31 | 2019-07-31 | Electromagnetic directional valve of urea pump assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921227322.4U CN210372128U (en) | 2019-07-31 | 2019-07-31 | Electromagnetic directional valve of urea pump assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210372128U true CN210372128U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921227322.4U Active CN210372128U (en) | 2019-07-31 | 2019-07-31 | Electromagnetic directional valve of urea pump assembly |
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| CN (1) | CN210372128U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397761A (en) * | 2019-07-31 | 2019-11-01 | 浙江锦佳汽车零部件有限公司 | Urea pump assembly solenoid directional control valve |
-
2019
- 2019-07-31 CN CN201921227322.4U patent/CN210372128U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110397761A (en) * | 2019-07-31 | 2019-11-01 | 浙江锦佳汽车零部件有限公司 | Urea pump assembly solenoid directional control valve |
| CN110397761B (en) * | 2019-07-31 | 2024-03-01 | 浙江锦佳汽车零部件有限公司 | Electromagnetic reversing valve of urea pump assembly |
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