CN220228005U - Electromagnetic reversing valve and liquid delivery mechanism comprising same - Google Patents

Abstract

The utility model discloses an electromagnetic reversing valve and a liquid throwing mechanism comprising the same, wherein the electromagnetic reversing valve comprises a coil assembly, an iron core assembly, a clutch assembly and a valve body, and the coil assembly is electrically connected with a power supply; the iron core component axially penetrates through the coil component and axially moves under the action of magnetic field force; the clutch assembly is provided with two groups and is connected with the two axial ends of the iron core assembly; the two valve bodies are fixed at the two axial ends of the coil assembly and are controlled to be closed or opened by the clutch assembly in a one-to-one correspondence mode. When the iron core component is in the initial position, the two valve bodies are closed, and when the iron core component extends towards one end, the clutch component at the other end of the iron core component enables the valve body connected with the iron core component to be opened. The utility model adopts the cooperation of the single coil component and the iron core component, controls the direction of the iron core component under the action of magnetic force by switching the direction of current in the coil component, and cooperates with the clutch component to realize the purpose of controlling the two-way valve.

Description

Electromagnetic reversing valve and liquid delivery mechanism comprising same

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic reversing valve and a liquid delivery mechanism comprising the same.

Background

Solenoid valves are widely used in liquid delivery mechanisms for household appliances, such as washing machines, dishwashers and the like.

The electromagnetic valve is through the mechanical motion of electromagnet current's on-off control valve body, liquid throwing mechanism has two liquid flows to constitute, two liquid flows have inlet and liquid outlet respectively promptly, and two liquid throwing pipeline switch on at different times, it is usually to need to use two electromagnetic valves to control two liquid throwing pipeline respectively, so not only make the cost of electrical apparatus rise, also can occupy its inner space more, two electromagnetic valves need accurate switching moreover, can have the problem that control accuracy can not guarantee, in the moment that two electromagnetic valves switch, when the electromagnetic valve appears closing delay, two pipelines can open simultaneously in the short time, do not accord with the throwing order of washing process.

Therefore, how to design an electromagnetic reversing valve with a simple structure and capable of enabling two delivery pipelines of a liquid delivery mechanism to be not conducted simultaneously is a technical problem to be solved at present.

Disclosure of Invention

In order to solve the technical problems that two electromagnetic valves for a liquid delivery mechanism of a household appliance in the prior art are required to be arranged, two liquid pipelines are controlled respectively, so that the cost of the appliance is increased, the occupied internal space is more, and the risk of confusion of the detergent delivery sequence exists, the utility model provides an electromagnetic reversing valve and the liquid delivery mechanism comprising the electromagnetic reversing valve, and aims to solve the problems.

The utility model provides an electromagnetic reversing valve, which comprises a coil assembly, an iron core assembly, a clutch assembly and a valve body, wherein the coil assembly is electrically connected with a power supply; the iron core component axially penetrates through the coil component and axially moves under the action of magnetic field force; the clutch assembly is provided with two groups and is connected with the two axial ends of the iron core assembly; the two valve bodies are fixed at the two axial ends of the coil assembly and are controlled to be closed or opened by the clutch assembly in a one-to-one correspondence mode.

When the iron core component is in the initial position, the two valve bodies are closed, and when the iron core component extends towards one end, the clutch component at the other end of the iron core component enables the valve body connected with the iron core component to be opened.

Further, the clutch assembly includes a tie rod, a seal member, and an elastic member: the pull rod is connected with one end of the iron core component; the sealing piece is fixed at one end of the pull rod far away from the iron core assembly, and is provided with a first sealing surface which can be in sealing fit with the valve body and seal the valve body; the elastic piece is axially abutted between the sealing piece and the iron core assembly.

When the iron core component extends towards one end, the first sealing surface at the other end of the iron core component is separated from the valve body, so that the valve body is opened.

Further, the valve body comprises a valve pipe, a liquid inlet arranged on the outer peripheral surface of the valve pipe, a liquid outlet arranged at the axial end of the valve pipe and a flow port penetrating through the wall surface of the valve pipe, and the liquid inlet is communicated with the liquid outlet through the flow port; when the valve body is closed, the first sealing surface is in sealing fit with the flow port.

Further, the flow port is positioned at the end face of the valve tube, which faces the iron core component; the seal also includes a sealing ring sealingly connecting the valve body and the coil assembly.

Further, the sealing element further comprises a sealing gasket and a deformation ring connected with the sealing ring and the sealing gasket, wherein the inner diameter of the sealing ring is larger than the outer diameter of the sealing gasket, the deformation ring can enable the sealing gasket to axially move, and the first sealing surface is located on the end face of the sealing gasket.

Further, the center of the sealing pad is provided with a shaft hole for the pull rod to pass through, and one end, far away from the iron core component, of the pull rod is abutted with the end face of the sealing pad, so that the pull rod is axially limited between the sealing pad and the iron core component.

Further, the pull rod is close to the outer peripheral face of one end of the iron core assembly and is provided with a clamping hook, the iron core assembly comprises an iron core and a shell located on the periphery of the iron core, connecting portions for the insertion of the pull rod are extended from the shell to two ends in the axial direction, the outer peripheral face of each connecting portion is provided with a long groove for the insertion of the clamping hook, and the clamping hook can reciprocate in the long groove.

Further, a plurality of axially extending notches are further arranged at one end, close to the pull rod, of the connecting portion, and the notches and the long grooves are alternately arranged.

Further, the gasket is internally provided with a supporting metal sheet.

Further, the coil assembly comprises a coil framework, a permanent magnet and windings wound on the coil framework, and the two axial ends of the coil assembly are provided with threaded surfaces in threaded connection with the two valve bodies.

The utility model also provides a liquid throwing mechanism which comprises a box body, a rubber pipe and the electromagnetic reversing valve, wherein the box body is provided with two liquid inlets, and the two liquid outlets of the electromagnetic reversing valve are respectively connected with the two liquid inlets in a one-to-one correspondence manner through the rubber pipe.

Further, the mounting plate for accommodating the coil assembly is arranged at the top of the box body, first limiting plates are arranged on two sides of the mounting plate perpendicular to the axial direction of the coil assembly, and two ends of each first limiting plate are respectively abutted to end faces of the two valve bodies.

Further, the valve body is provided with a limiting boss which is abutted with the end face of one of the first limiting plates, and the two first limiting plates are arranged in a central symmetry mode.

Further, the periphery symmetry of coil assembly is equipped with two second limiting plates, two the second limiting plate is located two first limiting plate insides and with two first limiting plate surface laminating.

Further, the two first limiting plates are also provided with buckles for clamping the second limiting plates.

Further, the mounting plate comprises an arc-shaped surface attached to the surface of the coil assembly and a horizontal surface which is positioned on two sides of the arc-shaped surface and connected with the first limiting plate, and the horizontal surface is abutted to the lower surface of the second limiting plate.

The beneficial effects of the utility model are as follows:

(1) The electromagnetic reversing valve and the liquid throwing mechanism comprising the same are matched with each other by adopting the single coil assembly and the iron core assembly, and the direction of the iron core assembly under the action of magnetic field force is controlled by switching the direction of current in the coil assembly and matched with the clutch assembly, so that the aim of controlling the two-way valve is fulfilled.

(2) According to the utility model, the clutch component opens the valve bodies when the iron core component extends in the direction away from the iron core component, so that the two valve bodies are opened for different time, the phenomenon of simultaneously opening the two valve bodies is avoided, and different detergents can be respectively put in.

Drawings

The utility model will be further described with reference to the drawings and examples.

Fig. 1 is an exploded view of an electromagnetic directional valve according to the present utility model;

FIG. 2 is a schematic illustration of the electromagnetic directional valve of the present utility model in an unpowered state;

FIG. 3 is a schematic diagram of the electromagnetic directional valve according to the present utility model when it is energized in the forward direction;

FIG. 4 is a schematic diagram of the electromagnetic directional valve according to the present utility model when reverse energized;

FIG. 5 is a schematic view of the coil assembly of the present utility model;

FIG. 6 is a schematic diagram of the assembly of the coil assembly with the core assembly of the present utility model;

FIG. 7 is a perspective view of a core assembly of the present utility model;

fig. 8 is an axial cross-sectional view of the core assembly of fig. 7;

FIG. 9 is a perspective view of a tie rod of the present utility model;

FIG. 10 is an axial cross-sectional view of the tie rod of FIG. 9;

FIG. 11 is a perspective view of a seal of the present utility model;

FIG. 12 is an axial cross-sectional view of the seal shown in FIG. 11;

FIG. 13 is a perspective view of the valve body of the present utility model;

FIG. 14 is an axial cross-sectional view of the valve body of FIG. 13;

FIG. 15 is a schematic view of the connection of the iron core assembly to the tie rod of the present utility model;

FIG. 16 is an axial cross-sectional view of FIG. 15;

FIG. 17 is an exploded view of an embodiment of the liquid delivery mechanism of the present utility model;

FIG. 18 is a perspective view of the housing of the present utility model;

FIG. 19 is a schematic view of the electromagnetic directional valve of the present utility model mated with a mounting plate and a first limiting plate;

fig. 20 is a perspective view of a specific embodiment of the liquid delivery mechanism according to the present utility model.

In the figure, 1, a coil component, 101, a coil bobbin, 1011, a thread surface, 102, a permanent magnet, 103, a winding, 2, an iron core component, 201, an iron core, 202, a housing, 203, a connecting part, 2031, an elongated slot, 2032, a chamfer locking surface, 2033, a notch, 3, a clutch component, 301, a pull rod, 3011, a trip, 3012, a baffle, 302, a sealing member, 3021, a gasket, 3022, a sealing ring, 3023, a deformation ring, 3024, a supporting metal sheet, 303, an elastic member, 4, a valve body, 401, a valve tube, 4011, an internal thread, 4012, a first limiting surface, 4013, limiting boss, 402, liquid inlet, 403, liquid outlet, 404, circulation port, 4041, second sealing surface, 4042, third sealing surface, 5, first sealing surface, 6, horizontal part, 7, bending part, 8, shaft hole, 9, shell, 901, liquid inlet, 902, mounting plate, 9021, arc surface, 9022, horizontal plane, 903, first limiting plate, 9031, first limiting wall, 9032, buckle, 10, rubber tube, 11, electromagnetic directional valve, 12, second limiting plate, 1201, outer surface, 1202, upper stopping surface, 1203, lower stopping surface, 13, and shell cover.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

Example 1

As shown in fig. 1 to 4, an electromagnetic directional valve comprises a coil assembly 1, an iron core assembly 2, a clutch assembly 3 and a valve body 4, wherein the coil assembly 1 is electrically connected with a power supply; the iron core component 2 axially penetrates through the coil component 1 and axially moves under the action of magnetic field force; the clutch component 3 is provided with two groups which are connected with the two axial ends of the iron core component 2; the two valve bodies 4 are fixed at the two axial ends of the coil assembly 1 and are controlled to be closed or opened by the clutch assemblies 3 in a one-to-one correspondence mode. When the iron core assembly 2 is at the initial position, the two valve bodies 4 are closed, and when the iron core assembly 2 extends towards one end, the clutch assembly 3 at the other end of the iron core assembly 2 enables the valve bodies 4 connected with the iron core assembly to be opened. When the valve body 4 is closed, the liquid cannot circulate, and when the valve body 4 is opened, the liquid can circulate through the valve body 4.

The coil assembly 1 can be electrified with forward direct current and reverse direct current, and then two magnetic field forces in opposite directions are generated, so that the iron core assembly 2 moves in two opposite directions along the axial direction, the clutch assembly 3 plays a role of a valve body 4 connected or disconnected, when the iron core assembly 2 moves rightwards from the initial position, the iron core assembly 2 applies a pulling force to the clutch assembly 3 at the left end, the clutch assembly 3 at the left end is disconnected from the valve body 4, the valve body 4 at the left end is still kept in a closed state, and the valve body 4 at the right end is still kept in a closed state; when the iron core assembly 2 moves leftwards from the initial position, the iron core assembly 2 applies a pulling force to the clutch assembly 3 at the right end, the clutch assembly 3 at the right end is disconnected from the valve body 4, the valve body 4 at the right end is opened, and the valve body 4 at the left end is in a closed state.

Because the clutch assembly 3 at only one end is pulled when the iron core assembly 2 moves to one end, the valve body 4 at only one end can be opened, and only one liquid can be put in at the same time.

Clutch assembly 3:

as shown in fig. 3 and 12, the clutch assembly 3 includes a tie rod 301, a seal member 302, and an elastic member 303: the pull rod 301 is connected with one end of the iron core assembly 2; a seal 302 is fixed to the end of the pull rod 301 remote from the core assembly 2, the seal 302 having a first sealing surface 5 capable of sealing engagement with the valve body 4 and closing the valve body 4; the resilient member 303 axially abuts between the seal member 302 and the core assembly 2. When the core assembly 2 is extended toward one end, the first sealing surface 5 at the other end of the core assembly 2 is separated from the valve body 4, so that the valve body 4 is opened.

The pull rods 301 are movably connected with the iron core assembly 2, the elastic pieces 303 enable the pull rods 301 to axially move relative to the iron core assembly 2 and be tensioned all the time, when the iron core assembly 2 is at an initial position, the two pull rods 301 are pushed out to two ends of the iron core assembly 2 by the elastic pieces 303, the sealing pieces 302 connected with the pull rods 301 seal the valve body 4, when the iron core assembly 2 moves towards one end, the elastic pieces 303 at one end in the moving direction are compressed, and the sealing pieces 302 connected with the pull rods 301 continuously abut against the valve body 4; the elastic member 303 located in the opposite direction of the movement of the core assembly 2 and the pull rod 301 are pulled together, so that the sealing member 302 at the end is separated from the valve body 4 after being translated, and the valve body 4 is opened.

Since the sealing member 302 at one end of the moving direction of the iron core assembly 2 needs to continuously abut against the valve body 4 when moving towards one end, that is, the axial position of the sealing member 302 is unchanged, the iron core assembly 2 and the pull rod 301 or the pull rod 301 and the sealing member 302 need to have axial relative movement, so that when the iron core assembly 2 moves towards one sealing member 302, the sealing member 302 can keep unchanged in position, and the other sealing member 302 can move along with the iron core assembly 2.

In the specific embodiment of the present utility model, the pull rod 301 is slidably matched with the iron core assembly 2, the pull rod 301 and the sealing member 302 axially synchronously move, and the pull rod 301 and the iron core assembly 2 can adopt the following connecting structure, but not limited to:

as shown in fig. 7 to 10, a hook 3011 is disposed on an outer peripheral surface of one end of the pull rod 301, which is close to the core assembly 2, the core assembly 2 includes a core 201 and a housing 202 disposed on an outer periphery of the core 201, the housing 202 extends toward both ends in an axial direction to form a connection portion 203 into which the pull rod 301 is inserted, that is, a center of the connection portion 203 has an axial through hole, an outer peripheral surface of the connection portion 203 has an elongated slot 2031 into which the hook 3011 is inserted, and the hook 3011 can reciprocate in the elongated slot 2031. The width of the hook 3011 is slightly greater than the width of the elongated slot 2031, and the length of the hook 3011 is less than the length of the elongated slot 2031. When the core assembly 2 is in the initial position, the hook 3011 is located at an end of the elongated slot 2031 that is distal from the core 201. Taking the left connecting portion 203 in fig. 15 and 16 as an example, when the iron core assembly 2 is at the initial position, the left hook 3011 is located at the left end in the long groove 2031, the right hook 3011 is located at the right end of the long groove 2031, when the iron core assembly 2 stretches out leftwards, the left hook 3011 can move rightwards in the long groove 2031, the left pull rod 301 is kept stationary, so the left valve body 4 is kept closed, the right hook 3011 is already abutted against the right end of the long groove 2031, and no relative movement space exists, the right pull rod 301 is driven by the iron core assembly 2 to move rightwards, so that the right sealing element 302 is separated from the valve body 4, and the right valve body 4 is opened.

As shown in fig. 13 and 14, the valve body 4 generally includes a valve tube 401, a liquid inlet 402 located on the outer peripheral surface of the valve tube 401, a liquid outlet 403 located at the axial end of the valve tube 401, and a flow port 404 penetrating the wall surface of the valve tube 401, the liquid inlet 402 being communicated with the liquid outlet 403 through the flow port 404; when the valve body 4 is closed, the first sealing surface 5 is in sealing engagement with the flow opening 404.

The coil assembly 1 generally comprises a coil skeleton 101, a permanent magnet 102 and a winding 103 wound on the coil skeleton 101, wherein two ends of the coil skeleton 101 are fixed with the two valve bodies 4 in the following specific fixing modes: the two axial ends of the coil skeleton 101 have screw surfaces 1011 screwed to the two valve bodies 4, and as shown in fig. 3, 5, 6 and 14, the screw surfaces 1011 at the two ends of the coil skeleton 101 are external screws, the part of the valve body 4 connected to the coil skeleton 101 is located at one end of the valve tube 401, one end of the valve tube 401 is provided with internal screw threads 4011, and the other end is provided with a liquid outlet 403.

The coil assembly 1 is electrified to magnetize the iron core assembly 2, the two ends of the iron core assembly 2 are distributed in an NS pole mode, meanwhile, the permanent magnets 102 are arranged in the middle of the coil assembly 1 and are also distributed in an NS pole mode, the iron core assembly 2 can move by utilizing the characteristic that like poles repel each other after the coil assembly 1 is electrified, the coil assembly 1 is electrified continuously, and the iron core assembly 2 can keep a stressed state; after power failure, the core assembly 2 is restored to the neutral equilibrium state by the two side elastic members 303.

The joint of the valve body 4 and the coil skeleton 101 needs to be sealed, in order to reduce the installation procedure, the utility model arranges a sealing structure on the sealing element 302, specifically, the circulation port 404 is positioned at the end face of the valve tube 401 facing the iron core component 2; the sealing member 302 further comprises a sealing ring 3022 for sealing the valve body 4 and the coil assembly 1, in the structure of the valve body 4 shown in fig. 14, the circulation port 404 is located on the inner wall of the valve tube 401, the circulation port 404 is an annular notch, the opening of the circulation port 404 faces the right end of the valve body 4, a short tube with a short length is formed on the valve tube 401 inside the circulation port 404, the internal thread 4011 is located on the valve tube 401 outside the circulation port 404, and a second sealing surface 4041 and a third sealing surface 4042 are respectively formed inside and outside the circulation port 404, as shown in the valve body 4 on the right side of the iron core assembly 2 in fig. 2, the second sealing surface 4041 is in sealing contact with the first sealing surface 5, the third sealing surface 4042 is in sealing contact with the right end surface of the sealing ring 3022, and the right end surface of the coil bobbin 101 is in sealing contact with the left end surface of the sealing ring 3022, so that the sealing member 302 can realize the sealing of the circulation port 404 and the sealing of the coil bobbin 101 and the valve body 4, and the structure is compact, and the installation is convenient.

Since the valve body 4 and the coil bobbin 101 are fixed to each other, i.e., the position of the seal ring 3022 is always fixed, and the first seal surface 5 needs to be in contact with or away from the flow port 404, the seal ring 3022 and the first seal surface 5 can relatively move when the seal member 302 is subjected to a tensile force. The seal member 302 further comprises a sealing pad 3021 and a deformation ring 3023 for connecting the sealing ring 3022 and the sealing pad 3021, wherein the inner diameter of the sealing ring 3022 is larger than the outer diameter of the sealing pad 3021, the deformation ring 3023 can enable the sealing pad 3021 to move axially, and the first sealing surface 5 is located on the end face of the sealing pad 3021. The deformation ring 3023 may be made of a deformation material, as shown in fig. 11 and 12, the deformation ring 3023 is formed by connecting a horizontal portion 6 and a bending portion 7, the sealing pad 3021 is connected to the pull rod 301, and when the sealing pad 3021 is pulled rightward, the horizontal portion 6 may press the bending portion 7 to deform the bending portion 7, so that the sealing pad 3021 has a rightward movement space and is separated from the left-end flow port 404, so that the valve body 4 is opened.

The connection between the gasket 3021 and the tie rod 301 is as follows: the center of the sealing pad 3021 is provided with a shaft hole 8 through which the pull rod 301 passes, and one end of the pull rod 301, which is far away from the iron core assembly 2, is abutted against the end surface of the sealing pad 3021, so that the pull rod 301 is axially limited between the sealing pad 3021 and the iron core assembly 2. As shown in fig. 10, the left end of the tie rod 301 has a blocking piece 3012, and the right end face of the blocking piece 3012 abuts against the left end face of the gasket 3021. When the pull rod 301 is pulled toward the core assembly 2, the gasket 3021 may be pulled simultaneously.

Example two

On the basis of the first embodiment, as shown in fig. 7 and 8, the end of the connecting portion 203, which is close to the pull rod 301, is further provided with a plurality of notches 2033 extending in the axial direction, and the notches 2033 are alternately arranged with the elongated grooves 2031. Since the hooks 3011 protrude from the surface of the tie rod 301, the radial dimension of the hooks 3011 is larger than the diameter of the central through hole of the connecting portion 203, and the notch 2033 can allow the end of the connecting portion 203 to expand, so that the hooks 3011 can more easily enter the connecting portion 203 and extend out of the elongated slot 2031.

Example III

On the basis of the above embodiment, as shown in fig. 12, the supporting metal sheet 3024 is provided in the sealing pad 3021, which is used to provide a certain rigid support for the sealing pad 3021, when the pull rod 301 pulls the sealing pad 3021, because the supporting metal sheet 3024 is provided inside, the sealing pad 3021 can be pulled better, if the supporting metal sheet 3024 is not provided, the pull rod 301 is easy to be pulled out from the shaft hole 8, and the supporting metal sheet 3024 is preferably a steel sheet.

The specific working principle is as follows:

1. the electromagnetic directional valve 11 is in a non-energized state:

as shown in fig. 2, it can be seen from the figure that:

a. the threaded surface 1011 of the coil assembly 1 is matched with the internal threads 4011 of the valve body 4, so that the valve bodies 4 on two sides are in fastening connection with the coil assembly 1, and meanwhile, the sealing ring 3022 is arranged between the third sealing surface 4042 and the end surface of the coil skeleton 101 and forms a seal with the third sealing surface 4042 and the end surface of the coil skeleton 101.

b. The elastic member 303 is disposed between the coil assembly 1 and the sealing member 302, one end of the elastic member 303 is matched with the end face of the sealing pad 3021, and the other end is matched with the end face of the coil skeleton 101, and due to the elastic force of the elastic members 303, the first sealing surface 5 of the sealing pad 3021 on both sides and the second sealing surface 4041 of the valve body 4 on both sides form a seal in the valve body 4 on both sides, so as to block the communication between the liquid inlet 402 and the liquid outlet 403 of the valve body 4.

c. The iron core component 2 is arranged at the central hole of the coil component 1 and can move left and right in the central hole, and when the coil component 1 is not electrified, the long grooves 2031 on the left side and the right side of the iron core component 2 are respectively matched with the hooks 3011 of the pull rod 301; while the middle part of the pull rod 301 is matched with the shaft hole 8 and forms a seal with the shaft hole 8, and the baffle 3012 of the pull rod 301 is matched with the end face of the sealing pad 3021; in the non-energized state, the iron core assembly 2 has no interaction force with the two side pull rods 301.

2. The solenoid valve assembly is in a forward energized state:

a. as shown in fig. 3, when the coil assembly 1 is positively energized with direct current, the iron core assembly 2 has magnetism, and under the interaction with the magnetic force of the permanent magnet 102, the iron core assembly 2 moves to the right side to drive the pull rod 301 at the left side to move, the right end surface of the baffle 3012 of the pull rod 301 pulls the sealing pad 3021 to move to the right side against the elastic force of the elastic member 303, and at this time, the deformation ring 3023 of the sealing member 302 deforms to ensure that the sealing pad 3021 can move; when the elastic member 303 is compressed to a pitch of 0 or the tensile force of the core assembly 2 is equal to the elastic force, the core assembly 2 cannot move any more, and the state is maintained in the continuously-powered state.

b. In the above state, the first sealing surface 5 of the left seal member 302 is separated from the second sealing surface 4041 of the valve body 4, so that no sealing effect is formed, and the liquid inlet 402 and the liquid outlet 403 of the left valve body 4 are communicated, at this time, liquid can enter the valve body 4 through the liquid inlet 402 and then flow out from the liquid outlet 403, and the flow direction of the liquid is shown by an arrow.

c. When the iron core assembly 2 moves rightward, the hook 3011 of the right pull rod 301 is separated from the chamfer locking surface 2032 at the right end of the elongated slot 2031, and the hook 3011 can relatively move in the elongated slot 2031 without being subjected to the force of the iron core assembly 2 moving rightward, so that the right seal 302 and the right valve body 4 are still in a sealed state under the force of the elastic member 303.

3. The solenoid valve assembly is in a reverse energized state:

a. as shown in fig. 4, when the coil assembly 1 is reversely energized with direct current, the iron core assembly 2 has magnetism, and under the interaction with the magnetic force of the permanent magnet 102, the iron core assembly 2 moves to the left side, so as to drive the pull rod 301 on the right side to move, and the pull rod 301 pulls the sealing pad 3021 to move to the left side against the elastic force of the elastic member 303; when the elastic member 303 is compressed to a pitch of 0 or the tensile force of the core assembly 2 is equal to the elastic force, the core assembly 2 cannot move any more, and the state is maintained when the reverse electric state is continuously conducted.

b. In the above state, the first sealing surface 5 of the right sealing member 302 is separated from the second sealing surface 4041 of the valve body 4, so that the sealing effect is no longer achieved, the liquid inlet 402 and the liquid outlet 403 of the right valve body 4 are communicated, at this time, liquid can enter the valve body 4 through the liquid inlet 402 and then flow out of the liquid outlet 403, the tightness of the inside of the left valve body 4 is not affected, and the liquid flow direction in the right valve body 4 is shown by an arrow.

4. In the state where the electromagnetic directional valve 11 is again powered off:

when the current of the electromagnetic directional valve 11 is cut off, the iron core 201 in the iron core assembly 2 is demagnetized, and at this time, the sealing members 302 at the left and right sides are restored to form a sealing effect with the valve body 4 under the action of the elastic member 303, and the iron core assembly 2 is also restored to the relative middle position under the action of the pull rods 301 at the two sides.

Through the scheme, the combination of the single coil assembly 1 and the iron core assembly 2 and the cooperation of the iron core assembly 2 and the clutch assemblies 3 on the two sides are utilized, the direct current direction in the coil assembly 1 is changed, and the stress direction of the iron core assembly 2 is controlled, so that the on-off of different valve bodies 4 is controlled, the utilization rate of the coil assembly 1 and the iron core assembly 2 is improved, and certain part cost and corresponding installation space are saved.

Example IV

The utility model provides a liquid delivery mechanism, includes box body, rubber tube 10 and above electromagnetic valve 11, and the box body is by casing 9 and cap 13 lid formation, and inside has the cavity, the box body have two with the liquid filling port 901 of cavity intercommunication, two liquid outlets 403 of electromagnetic valve 11 are connected with two liquid filling ports 901 one-to-one through rubber tube 10 respectively. As shown in fig. 17 and 20, two rubber tubes 10 are provided, an electromagnetic directional valve 11 is installed at the top of the housing 9, two liquid filling openings 901 are respectively formed at two sides of the housing 9, and liquid enters corresponding washing cavities inside the housing 9 through the electromagnetic directional valve 11, the rubber tubes 10 at two sides and the liquid filling openings 901.

The box body and the electromagnetic directional valve 11 are preferably mounted in a clamping manner, and the specific mounting structure is as follows:

displacement restriction of the electromagnetic directional valve 11 in the left-right direction: the top of the box body is provided with a mounting plate 902 for accommodating the coil assembly 1, two sides of the mounting plate 902 perpendicular to the axial direction of the coil assembly 1 are provided with first limiting plates 903, and two ends of each first limiting plate 903 are respectively abutted against the end surfaces of the two valve bodies 4 and used for limiting the axial displacement of the electromagnetic directional valve 11 along the coil assembly 1.

As shown in fig. 13, 18 and 19, the mounting plate 902 is located at the top of the housing 9, the end surface of the valve body 4 provided with the internal thread 4011 is a first limiting surface 4012, the left and right ends of the first limiting plate 903 are first limiting walls 9031, and the first limiting surface 4012 abuts against the first limiting walls 9031. Preferably, the valve body 4 has a limit boss 4013 abutting against an end face of one of the first limit plates 903, the two first limit plates 903 are arranged in a central symmetry manner, and the same valve body 4 abuts against the first limit wall 9031 through the first limit face 4012 and the limit boss 4013. Since the limit boss 4013 protrudes from the surface of the first limit surface 4012, the end surfaces of the two first limit plates 903 abutting against the same valve body 4 are not on the same plane, but are offset in the axial direction.

Displacement restriction of the electromagnetic directional valve 11 in the front-rear direction: the outer periphery of the coil assembly 1 is symmetrically provided with two second limiting plates 12, and the two second limiting plates 12 are located inside the two first limiting plates 903 and are attached to the surfaces of the two first limiting plates 903, that is, the outer surface 1201 of the second limiting plate 12 in fig. 5 contacts the opposite surfaces of the two first limiting plates 903, as shown in fig. 19.

Displacement restriction of the electromagnetic directional valve 11 in the up-down direction: the two first limiting plates 903 are further provided with buckles 9032 for clamping the second limiting plates 12, the electromagnetic directional valve 11 is pressed between the buckles 9032 and the mounting plate 902, the mounting plate 902 comprises an arc-shaped surface 9021 attached to the surface of the coil assembly 1 and horizontal surfaces 9022 located on two sides of the arc-shaped surface 9021 and connected with the first limiting plates 903, and the horizontal surfaces 9022 are in butt joint with the lower surfaces of the second limiting plates 12. As shown in fig. 18 and 19, the clip 9032 abuts against the upper stopper surface 1202 of the second stopper plate 12, and the horizontal surface 9022 abuts against the lower stopper surface 1203 of the second stopper plate 12, thereby fixing the position of the electromagnetic directional valve 11 in the up-down direction.

When the electromagnetic directional valve 11 is assembled with the housing 9, the electromagnetic directional valve 11 is only required to be downwards installed at the installation position of the housing 9 along the head of the buckle 9032, the installation position of the mutually matched surfaces is ensured, and after the buckle 9032 is matched with the upper stop surface 1202, the electromagnetic valve assembly can be fixed on the housing 9.

The electromagnetic directional valve 11 is installed in the above manner, so that not only is the installation manner convenient, but also the installation efficiency is improved by using the buckle 9032.

The working principle of the liquid delivery mechanism is introduced:

firstly, the electromagnetic directional valve 11 and the shell 9 are fixedly assembled in the above manner; and one end of the rubber tube 10 is matched with the liquid outlet 403 of the electromagnetic valve reversing valve, and the other end of the rubber tube 10 is matched with the liquid adding port 901 of the shell 9, so that the assembly of the integral throwing mechanism is completed.

When the electromagnetic directional valve 11 is electrified with forward direct current, the left valve is opened, the left valve is electrified with liquid, and the right valve is still in a sealing state due to the action of the clutch assembly 3; when reverse direct current is supplied to the electromagnetic directional valve 11, the right valve is opened, and the left valve is still in a sealed state due to the clutch assembly 3.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "inner," "outer," "axial," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "connected" should be interpreted broadly, and for example, it may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In this specification, a schematic representation of the terms does not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims (16)

1. An electromagnetic directional valve, characterized by comprising:

a coil assembly (1) electrically connected to a power source;

the iron core component (2) axially penetrates through the coil component (1) and axially moves under the action of magnetic field force;

the clutch assembly (3) is provided with two groups, and the two groups of clutch assemblies (3) are connected to the two axial ends of the iron core assembly (2);

the two valve bodies (4) are arranged and fixed at the two axial ends of the coil assembly (1), and are controlled to be closed or opened by the clutch assembly (3) in a one-to-one correspondence manner;

when the iron core assembly (2) is at the initial position, the two valve bodies (4) are closed, and when the iron core assembly (2) extends towards one end, the clutch assembly (3) at the other end of the iron core assembly (2) enables the valve bodies (4) connected with the iron core assembly to be opened.

2. The electromagnetic directional valve according to claim 1, characterized in that the clutch assembly (3) comprises:

the pull rod (301) is connected with one end of the iron core component (2);

a seal (302) fixed to an end of the tie rod (301) remote from the core assembly (2), the seal (302) having a first sealing surface (5) capable of sealingly engaging the valve body (4) and closing the valve body (4);

an elastic piece (303) axially abutted between the sealing piece (302) and the iron core assembly (2);

when the iron core assembly (2) extends towards one end, the first sealing surface (5) at the other end of the iron core assembly (2) is separated from the valve body (4) so that the valve body (4) is opened.

3. The electromagnetic directional valve according to claim 2, wherein: the valve body (4) comprises a valve pipe (401), a liquid inlet (402) arranged on the outer peripheral surface of the valve pipe (401), a liquid outlet (403) arranged at the shaft end of the valve pipe (401) and a circulation port (404) penetrating through the wall surface of the valve pipe (401), wherein the liquid inlet (402) is communicated with the liquid outlet (403) through the circulation port (404);

when the valve body (4) is closed, the first sealing surface (5) is in sealing fit with the flow port (404).

4. A solenoid directional valve (11) according to claim 3, characterized in that: the circulating port (404) is positioned at the end face of the valve tube (401) facing the iron core assembly (2); the seal (302) further comprises a sealing ring (3022) sealingly connecting the valve body (4) and the coil assembly (1).

5. The electromagnetic directional valve according to claim 4, wherein: the seal (302) further comprises a sealing gasket (3021) and a deformation ring (3023) connecting the sealing ring (3022) and the sealing gasket (3021), wherein the inner diameter of the sealing ring (3022) is larger than the outer diameter of the sealing gasket (3021), the deformation ring (3023) can enable the sealing gasket (3021) to axially move, and the first sealing surface (5) is located on the end face of the sealing gasket (3021).

6. The electromagnetic directional valve according to claim 5, wherein: the center of the sealing pad (3021) is provided with a shaft hole (8) through which the pull rod (301) passes, and one end, away from the iron core assembly (2), of the pull rod (301) is abutted against the end face of the sealing pad (3021) so that the pull rod (301) is axially limited between the sealing pad (3021) and the iron core assembly (2).

7. The electromagnetic directional valve according to claim 2, wherein: the utility model provides a pull rod (301) is close to one end outer peripheral face of iron core subassembly (2) and is equipped with trip (3011), iron core subassembly (2) include iron core (201) and are located shell (202) of iron core (201) periphery, shell (202) are extended to axial both ends have connecting portion (203) that supply pull rod (301) to insert, the outer peripheral face of connecting portion (203) has long groove (2031) that supply trip (3011) to insert, trip (3011) can reciprocate in long groove (2031).

8. The electromagnetic directional valve according to claim 7, wherein: the connecting part (203) is also provided with a plurality of notches (2033) extending axially near one end of the pull rod (301), and the notches (2033) and the long grooves (2031) are alternately arranged.

9. The electromagnetic directional valve according to claim 6, wherein: the gasket (3021) has a support metal sheet (3024) therein.

10. The electromagnetic directional valve according to claim 1, wherein: the coil assembly (1) comprises a coil framework (101), a permanent magnet (102) and windings (103) wound on the coil framework (101), and threaded surfaces (1011) in threaded connection with the two valve bodies (4) are arranged at two axial ends of the coil assembly (1).

11. A liquid delivery mechanism, characterized in that: the electromagnetic reversing valve comprises a box body, a rubber pipe (10) and the electromagnetic reversing valve (11) according to any one of claims 1-10, wherein the box body is provided with two liquid adding ports (901), and two liquid outlets (403) of the electromagnetic reversing valve (11) are respectively connected with the two liquid adding ports (901) in a one-to-one correspondence manner through the rubber pipe (10).

12. The liquid delivery mechanism of claim 11, wherein: the top of the box body is provided with a mounting plate (902) for accommodating the coil assembly (1), two sides of the mounting plate (902) perpendicular to the axial direction of the coil assembly (1) are provided with first limiting plates (903), and two ends of the first limiting plates (903) are respectively abutted to end faces of the two valve bodies (4).

13. The liquid delivery mechanism of claim 12, wherein: the valve body (4) is provided with a limiting boss (4013) which is abutted with the end face of one of the first limiting plates (903), and the two first limiting plates (903) are arranged in a central symmetry mode.

14. The liquid delivery mechanism of claim 12, wherein: two second limiting plates (12) are symmetrically arranged on the periphery of the coil assembly (1), and the two second limiting plates (12) are located on the inner sides of the two first limiting plates (903) and are attached to the surfaces of the two first limiting plates (903).

15. The liquid delivery mechanism of claim 14, wherein: the two first limiting plates (903) are also provided with buckles (9032) for clamping the second limiting plates (12).

16. The liquid delivery mechanism of claim 15, wherein: the mounting plate (902) comprises an arc-shaped surface attached to the surface of the coil assembly (1) and a horizontal surface which is positioned on two sides of the arc-shaped surface and connected with the first limiting plate (903), and the horizontal surface is abutted to the lower surface of the second limiting plate (12).