CN210372238U - Urea pump reversing valve actuator - Google Patents

Abstract

The utility model relates to an easily assemble and be connected more reasonable urea pump switching-over valve executor with the plectrum. The urea pump reversing valve actuator comprises an electromagnetic valve body, an electromagnetic valve iron core and an armature, and is characterized in that: the electromagnetic valve body is provided with a telescopic groove, the armature is arranged in the telescopic groove of the electromagnetic valve body in a vertically movable manner, the upper end of the armature is connected with a plectrum seat for clamping the plectrum, a reset spring is arranged between the plectrum seat and the electromagnetic valve body, an upper blocking piece and a lower supporting point for vertically limiting the plectrum are arranged on the plectrum seat, and a clamping block for clamping the plectrum is arranged between the upper blocking piece and the lower supporting point. The urea pump reversing valve actuator can drive the shifting piece to swing around a point on the shifting piece seat when the shifting piece seat moves up and down through the improvement of the shifting piece seat, so that the original swinging trend of the shifting piece can be met, and the connection between the shifting piece and the shifting piece seat is more reasonable.

Description

Urea pump reversing valve actuator

Technical Field

The utility model relates to an executor, concretely relates to use executor on urea pump switching-over valve.

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. The reversing valve generally comprises a valve core and a valve body, wherein the valve core is arranged on a shifting sheet, the valve body is provided with an interface connected with a urea tank, a pump core and a urea injection unit, a flow direction path is arranged in the valve body, and the valve core is enabled to block the corresponding flow direction path by driving the shifting sheet to act, so that the flow direction of fluid is changed. The shifting piece is driven by the electromagnetic valve (the electromagnetic valve belongs to an actuator), an actuating element of the existing general electromagnetic valve is fixedly connected with the valve core, the actuating element drives the valve core to vertically move up and down in work, and the valve core swings up and down (respectively blocking an upper hole and a lower hole) around a fulcrum in the valve body, so that the problem of looseness can occur in connection between the actuating element of the electromagnetic valve and the valve core over time, and finally drive failure is caused.

Disclosure of Invention

In view of the deficiencies in the prior art, the utility model discloses the innovation provides an easy equipment and be connected more reasonable urea pump switching-over valve executor with the plectrum.

The urea pump reversing valve actuator comprises an electromagnetic valve body, an electromagnetic valve iron core and an armature, and is characterized in that: the electromagnetic valve body is provided with a telescopic groove, the armature is arranged in the telescopic groove of the electromagnetic valve body in a vertically movable manner, the upper end of the armature is connected with a plectrum seat for clamping a plectrum, a reset spring is arranged between the plectrum seat and the electromagnetic valve body, an upper blocking piece and a lower supporting point for vertically limiting the plectrum are arranged on the plectrum seat, and a clamping block for clamping the plectrum 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 discloses a this kind of urea pump switching-over valve executor, through the improvement to its plectrum seat, the plectrum seat can order about the plectrum when reciprocating and wind a point swing on the plectrum seat, just so can cater to the plectrum swing trend originally to let the plectrum be connected more rationally with the plectrum seat, be difficult for breaking down.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a partial view of the present invention;

fig. 3 is a schematic structural view of the pick.

Detailed Description

As shown in figure 1, the urea pump reversing valve actuator comprises an electromagnetic valve body 1, an electromagnetic valve iron core 8 and an armature 2, wherein the electromagnetic valve body 1 is provided with a telescopic groove, the armature 2 is arranged in the telescopic groove of the electromagnetic valve body 1 in a vertically movable manner, and the electromagnetic valve iron core 8 is arranged at the bottom of the telescopic groove. The coil inside the electromagnetic valve body 1 is electrified to generate a magnetic field, the electromagnetic valve iron core 8 generates magnetic force, and the armature 2 is driven by the electromagnetic valve iron core 8 to move in the telescopic slot.

In order to transmit the shifting piece 11 (see the shifting piece 11 of fig. 3), the upper end of the armature 2 is connected with a shifting piece seat 5 for blocking the shifting piece 11, and a return spring 4 is arranged between the shifting piece seat 5 and the electromagnetic valve body 1. When the electromagnetic valve is electrified, the armature 2 moves downwards in the telescopic groove, so that the armature 2 drives the shifting piece seat 5 to move downwards, and the shifting piece seat 5 drives one end of the shifting piece 11 to move downwards; when the electromagnetic valve is powered off, the armature 2 moves upwards under the action of the return spring 4, and the shifting piece seat 5 carries one end of the shifting piece 11 to move upwards. Because the plectrum 11 of switching-over valve is around a fulcrum luffing motion on the valve body, in order to make plectrum seat 5 transmission plectrum 11 swing also around a fulcrum, the utility model discloses be equipped with on plectrum seat 5 and be used for spacing upper stop 7 and the lower support point 50 of plectrum 11 from top to bottom, and have the fixture block 72 that is used for blocking plectrum 11 between upper stop 7 and lower support point 50, as shown in fig. 3, have a recess 12 on plectrum 11, fixture block 72 just blocks in recess 12, prevents that plectrum 11 from removing about, and plectrum 11 is located between upper stop 7 and lower support point 50, and when plectrum seat 5 reciprocated, lower support point 50 was as the support point, and upper stop 7 was used in plectrum 11, made plectrum 11 swing. Through the structure, the assembly is convenient, and only the groove 12 of the plectrum 11 is opposite to the fixture block 72, so that the fixture block 72 is clamped in the groove 12 of the plectrum 11; secondly, the shifting piece 11 can swing around the lower supporting point 50, the self-swinging trend of the shifting piece 11 is met, and the shifting piece seat 5 is more stably connected with the shifting piece 11.

Since the shift plate 11 needs to swing by a required angle, in order to prevent the swing fulcrum of the shift plate 11 from moving up and down and ensure a swing angle of the shift plate 11, as shown in fig. 2, the front end of the upper stop 7 has a front stop surface 70 inclined upward, and the rear end of the upper stop 7 has a rear stop surface 71 inclined upward, and since the front stop surface 70 and the rear stop surface 71 are both inclined upward, the swing angle of the shift plate 11 can be completely and surface-to-surface fitted with the front stop surface 70 or the rear stop surface 71 at the maximum.

In order to facilitate the manufacture and the assembly, the utility model discloses a fixture block 72 is located and keeps off on 7 (integrated into one piece promptly), and is equipped with the connecting hole on keeping off 7 on, is equipped with the spliced pole on the plectrum seat 5, goes up to keep off 7 and just establishes on the spliced pole through the connecting hole cover, and is equipped with spacing face 51 in plectrum seat 5 upper end, is equipped with supporting spring 6 between spacing face 51 and last fender 7. That is, the upper stopper 7 is formed by one-time injection molding, and the plectrum seat 5 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 7 is sleeved on the connecting column through the connecting hole, and the upper stopper 7 is fixed on the plectrum seat 5 through the supporting spring 6, so that the assembly is very convenient; in addition, the supporting spring 6 can also provide the allowance for the up-and-down movement of the upper stopper 7, so as to ensure that the upper stopper 7 can give the plectrum 11 a sufficient swing angle (the original position of the plectrum seat 5 cannot ensure that the plectrum 11 is driven to generate a sufficient swing angle, and the supporting spring 6 can give the plectrum seat 5 an allowance for the up-and-down stroke). If the upper stopper 7 is damaged, the upper stopper 7 is only needed to be disassembled, the replacement is also very convenient, and meanwhile, the maintenance cost can be reduced.

In order to detachably connect the pick holder 5 to the armature 2, the lower end of the pick holder 5 is provided with a plurality of buckles, the surface of the armature 2 is provided with a buckle groove, and the pick holder 5 is buckled in the buckle groove through the buckles. Through the structure, the plectrum seat 5 is also very easy to assemble and disassemble, and is convenient to replace in the future.

Finally, it is worth mentioning that in order to keep the perpendicularity (or concentricity with the telescopic groove) that the armature 2 moves up and down, the utility model discloses be equipped with upper sliding bearing 3 in the telescopic groove of solenoid valve body 1, armature 2 just establishes in upper sliding bearing 3. In addition, in order to further improve the verticality, the solenoid valve iron core 8 is arranged at the bottom of the telescopic slot, the lower sliding bearing 9 is arranged on the solenoid valve iron core 8, the lower end of the armature 2 is a needle-shaped part 20, and the needle-shaped part 20 of the armature is arranged in the lower sliding bearing 9 in a matching mode.

Claims (6)

1. Urea pump switching-over valve executor, including solenoid valve body (1), solenoid valve iron core (8) and armature (2), its characterized in that: the electromagnetic valve body (1) is provided with a telescopic groove, the armature (2) can be arranged in the telescopic groove of the electromagnetic valve body (1) in a vertically moving mode, the upper end of the armature (2) is connected with a plectrum seat (5) used for clamping a plectrum, a reset spring (4) is arranged between the plectrum seat (5) and the electromagnetic valve body (1), an upper blocking piece (7) and a lower supporting point (50) which are used for vertically limiting the plectrum are arranged on the plectrum seat (5), and a clamping block (72) used for clamping the plectrum is arranged between the upper blocking piece (7) and the lower supporting point (50).

2. The urea pump directional control valve actuator of claim 1, wherein: the front end of the upper stopper (7) is provided with a front stopping surface (70) which inclines upwards, and the rear end of the upper stopper (7) is provided with a rear stopping surface (71) which inclines upwards.

3. The urea pump directional control valve actuator of claim 2, wherein: the clamping block (72) is located on the upper blocking piece (7), a connecting hole is formed in the upper blocking piece (7), a connecting column is arranged on the plectrum seat (5), the upper blocking piece (7) is sleeved on the connecting column through the connecting hole, a limiting surface (51) is arranged at the upper end of the plectrum seat (5), and a supporting spring (6) is arranged between the limiting surface (51) and the upper blocking piece (7).

4. The urea pump directional control valve actuator of claim 1, wherein: the lower end of the shifting piece seat (5) is provided with a plurality of buckles, the surface of the armature iron (2) is provided with a buckle groove, and the buckles of the shifting piece seat (5) are buckled in the buckle groove.

5. The urea pump directional control valve actuator of claim 1, wherein: an upper sliding bearing (3) is arranged in a telescopic groove of the electromagnetic valve body (1), and the armature (2) is arranged in the upper sliding bearing (3).

6. The urea pump directional control valve actuator of claim 1, wherein: solenoid valve iron core (8) are established in flexible tank bottom portion, be equipped with down sliding bearing (9) on solenoid valve iron core (8), the lower extreme of armature (2) is needle portion (20), needle portion (20) the matching of armature (2) sets up in slide bearing (9) down.

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