CN210318625U

CN210318625U - Miniature electromagnetic valve

Info

Publication number: CN210318625U
Application number: CN201921117605.3U
Authority: CN
Inventors: 李学谦
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-04-14
Anticipated expiration: 2029-07-17

Abstract

A miniature electromagnetic valve comprises an electromagnetic driving component, a valve seat and a diaphragm component, wherein the electromagnetic driving component controls the state of the diaphragm component in a cavity so as to control the connection or disconnection of liquid flowing through the valve seat; the electromagnetic driving component comprises a coil framework, a coil wound on the coil framework and a magnetic conduction piece, wherein an iron core used for controlling the membrane assembly is arranged in a middle hole of the coil framework, a reset spring is arranged on the iron core, the magnetic conduction piece comprises an upper end piece and a side piece, the side piece is close to or attached to the outer edge of the coil framework, and the upper end piece is close to or attached to the upper end face of the coil framework and blocks the upper opening of the middle hole; and a plastic shell is arranged on the periphery of the electromagnetic driving component. The utility model has the advantages of guaranteeing that the water yield is unchangeable, and realizing that the whole volume of solenoid valve becomes littleer to be suitable for the solenoid valve and can install in less space.

Description

Miniature electromagnetic valve

Technical Field

The utility model belongs to the technical field of the valve and specifically relates to a small miniature solenoid valve.

Background

The existing electromagnetic valve comprises an electromagnetic coil, a coil support fixedly connected with the electromagnetic coil and a base with a water inlet section and a water outlet section, wherein the electromagnetic coil is fixed on the base through the coil support; a diaphragm with a pressure clapboard is arranged in the base. Under a normal state, the reset spring stretches to act on the lower end of the iron core to enable the diaphragm to be blocked on the water inlet, so that the main circuit of the valve is in a disconnected state; when the main path of the valve needs to be switched on, power is supplied to the electromagnetic coil, the electromagnetic coil generates a magnetic field, the iron core moves upwards, the return spring is compressed, the diaphragm is separated from the water inlet, and normal water outlet is achieved. The solenoid valve disclosed in chinese patent document CN 207750570U belongs to this category of products.

The existing electromagnetic valve with the structure has the problem of larger volume, and can not be installed in places with smaller installation space of the valve, people try to reduce the existing electromagnetic valve in proportion to solve the problem of small-space installation, but two problems occur, firstly, after the base is reduced in proportion, the diameters of a water inlet section and a water outlet section of the base are also reduced, so that the water yield of the electromagnetic valve can not meet the requirement; secondly, after the electromagnetic valve body is reduced in proportion, the magnetic field intensity of the electromagnetic coil is insufficient, so that the iron core cannot be driven.

How to ensure the water yield to be unchanged and realize that the overall volume of the electromagnetic valve becomes smaller so as to be suitable for the problem that the electromagnetic valve can be installed in a smaller space is not well solved all the time.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above problems, the utility model provides a guaranteeing that the water yield is unchangeable, and can realize that the solenoid valve is whole to become littleer to be suitable for the miniature solenoid valve that the solenoid valve can be installed in less space.

The technical scheme of the utility model is that: the electromagnetic driving component controls the state of the diaphragm component in the cavity, so that the liquid flowing through the valve seat is controlled to be switched on or off; the electromagnetic driving component comprises a coil framework, a coil wound on the coil framework and a magnetic conduction piece, wherein an iron core used for controlling the membrane assembly is arranged in a middle hole of the coil framework, a reset spring is arranged on the iron core, the magnetic conduction piece comprises an upper end piece and a side piece, the side piece is close to or attached to the outer edge of the coil framework, and the upper end piece is close to or attached to the upper end face of the coil framework and blocks the upper opening of the middle hole; and a plastic shell is arranged on the periphery of the electromagnetic driving component.

As an improvement to the present invention, the plastic housing is formed into an integral structure with the electromagnetic driving member by injection molding.

As an improvement to the present invention, the outside of the electromagnetic driving member is injection molded to form an integrated electromagnetic driving member, and then the integrated electromagnetic driving member is disposed in the plastic housing.

As right the utility model discloses an improvement, magnetic conduction spare still includes the second lateral plate of being connected with the top end piece, the second lateral plate with the lateral plate symmetry sets up.

As right the utility model discloses an it is right to improve the keeping away from of magnetic conduction piece the one end of upper end piece is equipped with the clevis be equipped with the groove on the lower part lateral wall of coil skeleton, the clevis is in the inslot.

As an improvement, the utility model is characterized in that the upper end sheet of the magnetic conduction piece is provided with a magnetic conduction block in the middle hole of the coil framework.

As an improvement of the utility model, the lower end of the iron core is provided with a rubber cap.

As right the utility model discloses an improvement, the diaphragm subassembly is separated into cavity and lower cavity with the cavity, the cavity is including the section of intaking and go out the water section down, it connects the main valve mouth to go out the water section, pilot hole and action pressure conversion hole have been seted up on the diaphragm subassembly, the pilot hole will go up cavity and the section of intaking intercommunication, action pressure conversion hole 32 will go up cavity and play water section intercommunication.

As an improvement of the utility model, the lower end of the plastic shell is provided with a connecting seat.

As right the utility model discloses an improvement, cavity and lower cavity are separated into with the cavity to the diaphragm subassembly, the cavity is including the section of intaking and go out the water section down, it connects the main valve mouth to go out the water section, the last pilot hole of having seted up of diaphragm subassembly, the pilot hole will go up cavity and the section of intaking intercommunication be equipped with action pressure conversion hole on the side of coil skeleton lower part, action pressure conversion hole will go up cavity and play water section intercommunication.

As an improvement to the present invention, the wire diameter of the coil is selected between 0.05mm-0.12mm, the number of turns of the coil is determined by a predetermined coil resistance value, and generally, the number of turns of the coil 12 can be selected between 1500 turns-4000 turns.

The utility model adopts the technical proposal that the lateral piece of the magnetic conduction piece is designed to be close to or attached to the outer edge of the coil framework, and the upper end piece of the magnetic conduction piece is close to or attached to the upper end surface of the coil framework and blocks the upper opening of the middle hole; the periphery of the electromagnetic driving component is provided with a plastic shell, so that the structure that a hardware bracket (magnetic conduction piece) is arranged outside the shell in the prior art is changed, the volume of the electromagnetic driving component is reduced as much as possible under the condition that the flow of a valve seat is not changed, and the volume of the electromagnetic valve is reduced as a whole; the utility model is suitable for install in littleer space.

Drawings

Fig. 1 is a schematic view of a cross-sectional exploded structure of an embodiment of the present invention.

Fig. 2 is a schematic top view of the embodiment shown in fig. 1.

Fig. 3 is a schematic sectional structure view a-a of fig. 2.

Fig. 4 is a schematic cross-sectional structure diagram of another embodiment of the present invention.

Fig. 5 is a schematic perspective view of the present invention.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or assembly referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be interpreted broadly, e.g. as a fixed connection, a detachable connection or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the utility model can be understood in specific cases to those skilled in the art.

Referring to fig. 1-3, and fig. 5, fig. 1-3, and fig. 5 disclose a micro electromagnetic valve (in an unpowered state), including an electromagnetic driving member 1, a valve seat 2 with a water inlet section 21 and a water outlet section 22, and a diaphragm assembly 3, wherein a cavity 23 for accommodating the diaphragm assembly 3 is disposed on the valve seat 2, the diaphragm assembly 3 is disposed in the cavity 23, the diaphragm assembly 3 includes a pressure partition 33 and a diaphragm 34, the diaphragm 34 is wrapped on the pressure partition 33, the electromagnetic driving member 1 is disposed on the valve seat 2 corresponding to the cavity 23, and the electromagnetic driving member 1 controls a state of the diaphragm assembly 3 in the cavity 23, so as to control on or off of a liquid flowing through the valve seat 2; the electromagnetic driving component 1 comprises a coil frame 11, a coil 12 wound on the coil frame 11, and a magnetic conducting piece 13, wherein an iron core 112 for controlling the membrane module 3 is arranged in a central hole 111 of the coil frame 11, a return spring 113 is arranged on the iron core 112, the magnetic conducting piece 13 comprises an upper end piece 131 and a side piece 132, the side piece 132 is close to or attached to an outer edge 114 of the coil frame 11, and the upper end piece 131 is close to or attached to an upper end surface 115 of the coil frame 11 and blocks an upper opening of the central hole 111; a plastic housing 4 is provided around the periphery of the electromagnetic drive member 1. For the combination of the plastic shell 4 and the magnetic driving member 1, there are two ways, one way is to form an integral structure by injection molding with the electromagnetic driving member 1 after the magnetic driving member 1 is combined. In another embodiment, the electromagnetic driving member 1 is first injection-molded on the outer surface thereof, all the components constituting the electromagnetic driving member 1 are integrally injection-molded, and then the integrated electromagnetic driving member is fixedly disposed in the plastic housing 4. Preferably, the wire diameter of the coil 12 is selected between 0.05mm and 0.12mm, the number of turns of the coil is determined by a predetermined coil resistance value, and generally, the number of turns of the coil 12 is selected between 1500 turns and 4000 turns.

Utility model discloses close coil 12, coil skeleton 11 and magnetic conduction piece 13 in the magnetic drive component 1 as far as, make its volume reduce, but do not reduce magnetic field, can drive iron core 112 as usual, then, establish a plastic casing 4 that the volume is as little as possible again in magnetic drive component 1 to make the solenoid valve wholly reduce, but its flow does not change, and can also normally drive the work of iron core, really realized the miniaturation to the solenoid valve.

Preferably, the diaphragm assembly 3 divides the cavity 23 into an upper cavity and a lower cavity, the lower cavity comprises a water inlet section 21 and a water outlet section 22, the water outlet section 22 is connected with the main valve port 24, the diaphragm assembly 3 is provided with a pilot hole 31, the pilot hole 31 communicates the upper cavity with the water inlet section 21, the side surface of the lower part of the coil skeleton 11 is provided with an action pressure conversion hole 32, and the action pressure conversion hole 32 communicates the upper cavity with the water outlet section 22. In order to prevent water leakage from the operation pressure conversion hole 32, a second O-ring 7 is provided between the connection seat 41 of the coil bobbin 11 and the valve seat 2.

In this embodiment, under the action of the return spring 113, the lower end of the iron core 112 plugs the operation pressure conversion hole 32, at this time, the pilot hole 31 can introduce the water in the water inlet section 21 into the upper cavity, so that the pressure in the upper cavity is greater than that of the lower cavity, and the water path is cut off, when the water path needs to be conducted, the coil 12 is energized, the coil 12 generates a magnetic field, the iron core 112 is lifted upwards, the return spring 133 is compressed, and the operation pressure conversion hole 32 is released, at this time, the water in the upper cavity flows into the water outlet section 22 from the operation pressure conversion hole 32, the pressure in the upper cavity is reduced, under the action of the water inlet pressure, the diaphragm assembly 3 floats upwards, and the water inlet section 21 is communicated with the water outlet section 22 through the main valve 24, so that normal water.

Preferably, in order to facilitate the connection between the magnetic conductive member 13 and the coil bobbin 11, a connection fork 134 is disposed at one end of the magnetic conductive member 13, which is far away from the upper end plate 131, a groove 116 is disposed on a side wall of the lower portion of the coil bobbin 11, and the connection fork 134 is clamped in the groove 116, so that the injection molding of the housing is facilitated.

Preferably, a magnetic conduction block 117 is disposed in the central hole 111 of the coil bobbin 11 and closely attached to the upper end piece 131 of the magnetic conduction member 13, the magnetic conduction block 117 is added to better guide the magnetic field to the upper end of the iron core 112, so as to facilitate lifting the iron core 112, and in order to prevent water leakage, a first O-ring 5 is disposed between the magnetic conduction block 117 and the inner wall of the coil bobbin 11.

Preferably, a rubber cap 118 is disposed at the lower end of the iron core 112, and in this embodiment, the rubber cap 118 is used for sealing the operation pressure conversion hole 32.

Preferably, in order to facilitate the connection of the plastic housing 4 and the valve seat 2, a connection seat 41 may be provided at a lower end of the plastic housing 4. In order to facilitate connection with the pipe fitting, two quick connectors 6 can be respectively arranged at two ends of the valve seat 2, and the quick connectors 6 are composed of a connector 61, a head cover 62 and a third O-shaped sealing ring 63.

Referring to fig. 4, fig. 4 is a schematic cross-sectional view (in an unpowered state) of another embodiment of the present invention. The embodiment of fig. 4 is generally the same as the embodiment of fig. 1, except that: the magnetic conducting member 13 further includes a second side plate 133 connected to the upper end plate 131, and the second side plate 133 and the side plate 132 are symmetrically disposed, so as to be more beneficial to reinforcing the magnetic field of the iron core 112 (of course, the second side plate 133 may also be added in the embodiment shown in fig. 1). In addition, in this embodiment, the diaphragm assembly 3 divides the cavity 23 into an upper cavity and a lower cavity, the lower cavity includes a water inlet section 21 and a water outlet section 22, the water outlet section 22 is connected to the main valve port 24, the diaphragm assembly 3 is provided with a pilot hole 31 and an operation pressure conversion hole 32, the pilot hole 31 communicates the upper cavity with the water inlet section 21, and the operation pressure conversion hole 32 communicates the upper cavity with the water outlet section 22, that is, the operation pressure conversion hole 32 may also be designed to be provided in the structure of the diaphragm assembly 3 and also controlled by the iron core 112.

In this embodiment, the rubber cap 118 is used to seal the pressure conversion hole 32, and also has the function of preventing the iron core 112 from directly impacting the diaphragm assembly 3, so as to prolong the service life of the diaphragm assembly 3.

In this embodiment, under the normal condition, due to the action of the return spring 113, the lower end of the iron core 112 plugs the operation pressure conversion hole 32, and presses the diaphragm assembly 3 on the main valve port 24, at this time, the pilot hole 31 can introduce the water in the water inlet section 21 into the upper cavity, so that the pressure in the upper cavity is greater than that of the lower cavity, and the water path is cut off, when the water path needs to be conducted, the coil 12 is energized, the coil 12 generates a magnetic field, the iron core 112 is lifted upwards, the return spring 133 is compressed, and the operation pressure conversion hole 32 is released, at this time, the water in the upper cavity flows into the water outlet section 22 from the operation pressure conversion hole 32, the pressure in the upper cavity becomes small, under the action of the pressure of the inlet water, the diaphragm assembly 3 floats, and the water inlet section 21 is communicated with the water outlet section 22 through the.

In the above embodiments, the stroke distance between the inlet end of the actuating pressure conversion hole 32 and the lower end of the plunger 112 is selected to be 0.4-3 mm, and the shorter the stroke distance of the plunger 112, the less electric energy it consumes, but if the stroke distance is too short, the sensitivity of the solenoid valve is affected, and therefore, the stroke distance is preferably selected to be 0.4-3 mm.

It should be noted that the detailed explanation of the above embodiments is only for the purpose of explaining the present invention so as to better explain the present invention, but these descriptions should not be construed as limiting the present invention for any reason, and in particular, each feature described in different embodiments may be arbitrarily combined with each other to constitute other embodiments, and these features should be understood as being applicable to any one embodiment and not limited to only the described embodiments, except for the explicit contrary description.

Claims

1. A miniature electromagnetic valve comprises an electromagnetic driving component (1), a valve seat (2) with a water inlet section (21) and a water outlet section (22) and a membrane component (3), wherein a cavity (23) for accommodating the membrane component (3) is arranged on the valve seat (2), the membrane component (3) is arranged in the cavity (23), the electromagnetic driving component (1) is arranged on the valve seat (2) corresponding to the cavity (23), and the electromagnetic driving component (1) controls the state of the membrane component (3) in the cavity (23) so as to control the connection or disconnection of liquid flowing through the valve seat (2); the method is characterized in that: the electromagnetic driving component (1) comprises a coil frame (11), a coil (12) wound on the coil frame (11) and a magnetic conduction piece (13), wherein an iron core (112) used for controlling the membrane assembly (3) is arranged in a middle hole (111) of the coil frame (11), a reset spring (113) is arranged on the iron core (112), the magnetic conduction piece (13) comprises an upper end piece (131) and a side piece (132), the side piece (132) is close to or attached to an outer edge (114) of the coil frame (11), the upper end piece (131) is close to or attached to an upper end face (115) of the coil frame (11) and blocks an upper opening of the middle hole (111); and a plastic shell (4) is arranged on the periphery of the electromagnetic driving component (1).

2. The micro electromagnetic valve according to claim 1, wherein: the plastic shell (4) and the electromagnetic driving component (1) form an integrated structure in an injection molding mode.

3. The micro electromagnetic valve according to claim 1, wherein: and (2) forming an integrated electromagnetic driving component by injection molding on the outer side of the electromagnetic driving component (1), and then arranging the integrated electromagnetic driving component in a plastic shell (4).

4. A micro-solenoid valve according to claim 1, 2 or 3, characterized in that: the magnetism-conducting part (13) further comprises a second side piece (133) connected with the upper end piece (131), and the second side piece (133) and the side piece (132) are symmetrically arranged.

5. A micro-solenoid valve according to claim 1, 2 or 3, characterized in that: one end of the magnetic conduction piece (13) far away from the upper end piece (131) is provided with a connection fork (134), the side wall of the lower part of the coil framework (11) is provided with a groove (116), and the connection fork (134) is clamped in the groove (116).

6. A micro-solenoid valve according to claim 1, 2 or 3, characterized in that: and a magnetic conduction block (117) is arranged in the middle hole (111) of the coil framework (11) and clings to the upper end sheet (131) of the magnetic conduction piece (13).

7. A micro-solenoid valve according to claim 1, 2 or 3, characterized in that: and a rubber cap (118) is arranged at the lower end of the iron core (112).

8. A micro-solenoid valve according to claim 1, 2 or 3, characterized in that: the wire diameter of the coil (12) is selected from 0.05mm-0.12mm, and the number of turns of the coil is determined by the preset resistance value of the coil.

9. A micro-solenoid valve according to claim 1, 2 or 3, characterized in that: the diaphragm assembly (3) divides the cavity (23) into an upper cavity and a lower cavity, the lower cavity comprises a water inlet section (21) and a water outlet section (22), the water outlet section (22) is connected with a main valve port (24), a pilot hole (31) is formed in the diaphragm assembly (3), the upper cavity is communicated with the water inlet section (21) through the pilot hole (31), an action pressure conversion hole (32) is formed in the side face of the lower portion of the coil framework (11), and the upper cavity is communicated with the water outlet section (22) through the action pressure conversion hole (32).

10. The micro electromagnetic valve according to claim 9, wherein: the stroke distance between the inlet end of the action pressure conversion hole (32) and the lower end of the iron core (112) is selected between 0.4 and 3 millimeters.