CN218468365U - Iron core control structure - Google Patents

Abstract

The utility model discloses an iron core control structure and a solenoid valve, which comprises a coil framework, a magnetic conduction assembly, a permanent magnet and a movable iron core; a channel for the movable iron core to move is arranged in the coil framework, a limiting hole with a smaller diameter than the channel is formed at one end of the channel, and a spring for driving the movable iron core is arranged in the channel; a plurality of first limiting ribs are arranged on the inner wall of the limiting hole; the permanent magnet is arranged at one end of the channel so as to pull the movable iron core to move towards the direction close to the limiting hole; the magnetic conduction assembly forms an electromagnetic loop for drawing the movable iron core to move; and the working stroke of the end part of the movable iron core is always positioned in the limiting hole. Utilize first spacing muscle to move the one end of iron core and spring spacing, two parts ideal clearance activity spaces of independent limit control movable iron core and spring can prevent to deviate the axis eccentricity too much under medium pressure relatively, do not interfere moreover, reduce the possibility that the movable iron core blocked.

Description

Iron core control structure

Technical Field

The utility model relates to a solenoid valve technical field especially relates to an iron core control structure.

Background

The electromagnetic valve realizes that the movable iron core blocks the valve port or opens the valve port by moving the movable iron core in the electromagnetic control valve body; the working principle of a conventional electromagnetic valve can refer to an electromagnetic valve with publication number CN207599101U, which includes a static iron core, a movable iron core, a coil assembly, a first sealing portion, an electromagnetic valve cover, an electromagnetic valve body, a second sealing portion, a sealing auxiliary structure, and the like. In the use process of the existing electromagnetic valve, under the pressure action of a medium, a movable iron core is easy to rub against an inner wall in the moving process to cause blockage, so that the movable iron core cannot reliably complete the opening and closing functions; after the electromagnetic valve is used for a long time, dirt of media is attached to the inner wall, the movable iron core is blocked seriously, and misoperation of a switch is caused.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an iron core control structure and solenoid valve can solve above-mentioned problem to a certain extent at least.

The utility model discloses the technical scheme of an aspect is so realized:

a core control structure comprising:

the coil framework, the magnetic conduction assembly, the permanent magnet and the movable iron core;

a channel for the movable iron core to move is arranged in the coil framework, a limiting hole with a smaller diameter than the channel is formed at one end of the channel, and an elastic part for driving the movable iron core to move in a direction away from the limiting hole is arranged in the channel; the inner wall of the limiting hole is provided with a plurality of first limiting ribs arranged along the axial direction;

the permanent magnet is arranged at one end of the channel so as to pull the movable iron core to move towards the direction close to the limiting hole;

the magnetic conduction assembly forms an electromagnetic loop for drawing the movable iron core to move;

and the working stroke of the end part of the movable iron core is always positioned in the limiting hole.

As a further alternative of the iron core control structure, the elastic member is a spring; a first step part is formed between the limiting hole and the inner wall of the channel; a second step part is formed on the outer peripheral wall of the movable iron core; the spring is sleeved on the movable iron core, one end of the spring is abutted to the first step part, and the other end of the spring is abutted to the second step part.

As a further alternative of the iron core control structure, the inner wall of the channel is provided with a plurality of second limiting ribs arranged along the axial direction.

As a further alternative of the iron core control structure, a sealing element is arranged at one end of the movable iron core, which is far away from the limiting hole.

As a further alternative of the iron core control structure, a non-magnetic-conductive partition plate is arranged between the permanent magnet and the movable iron core.

As a further alternative of the iron core control structure, the non-magnetic conductive partition and the coil bobbin are of an integral structure, and the non-magnetic conductive partition is located at one end of the channel; the permanent magnet is arranged outside the coil framework.

As a further alternative of the iron core control structure, an embedding cavity for placing the permanent magnet is concavely arranged on the coil framework.

As a further alternative of the iron core control structure, the magnetic conducting assembly comprises a coil assembly and a magnetic conducting bracket, and the coil assembly is wound on the coil framework; the magnetic conduction support comprises an upper gland and a lower bottom plate, the coil framework is arranged between the upper gland and the lower bottom plate, and the permanent magnet is pressed on the coil framework by the upper gland.

The iron core control structure has the beneficial effects that: in the moving stroke of the movable iron core, the first limiting rib in the limiting hole limits one end of the movable iron core, so that the movable iron core is prevented from deviating from the axis too much under medium pressure, and the possibility of blocking of the movable iron core is reduced.

The utility model discloses on the other hand's technical scheme is realized like this:

an electromagnetic valve comprises any one of the iron core control structures.

Drawings

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

FIG. 1 is a schematic structural diagram of an iron core control structure applied to a solenoid valve;

FIG. 2 is a schematic structural view of a movable iron core for blocking a valve port;

FIG. 3 is a schematic view of the movable iron core opening the valve port;

fig. 4 is an exploded view of a core control structure;

FIG. 5 is a schematic view of the internal structure of the bobbin;

fig. 6 is a sectional view of the internal structure of the bobbin.

In the figure: 1. a valve body; 11. a valve port;

2. a coil bobbin; 21. a channel; 211. a second limiting rib; 22. a limiting hole; 221. a first limiting rib; 23. a first step portion; 24. a non-magnetically permeable separator; 25. an embedding cavity;

3. a movable iron core; 31. a second step portion; 32. a seal member;

4. a magnetic conductive component; 41. a coil assembly; 42. a magnetic conductive bracket; 421. a gland is arranged; 422. a lower base plate;

5. a spring;

6. and a permanent magnet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", 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 simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-6, there is shown a core control structure comprising a bobbin 2, a magnetically conductive assembly 4, a permanent magnet 6 and a movable core 3; a channel 21 for the movable iron core 3 to move is arranged in the coil framework 2, a limiting hole 22 with a smaller diameter than the channel 21 is formed at one end of the channel 21, and an elastic part for driving the movable iron core 3 to move in a direction away from the limiting hole 22 is arranged in the channel 21; the inner wall of the limiting hole 22 is provided with a plurality of first limiting ribs 221 which are arranged along the axial direction; the permanent magnet 6 is arranged at one end of the channel 21 to pull the movable iron core 3 to move towards the direction close to the limiting hole 22; the magnetic conduction component 4 forms an electromagnetic loop for drawing the movable iron core 3 to move; in the moving stroke of the movable iron core 3, the end of the movable iron core 3 is always located in the limiting hole 22.

Specifically, the movable iron core 3 in the iron core control structure is used for plugging or opening a valve port 11 on the valve body 1; assuming an initial state, as shown in fig. 2, the movable iron core 3 blocks the valve port 11 under the driving of the elastic member, and at this time, the magnetic conducting assembly 4 is energized, and the magnetic conducting assembly 4 generates an electromagnetic loop that pulls the movable iron core 3 away from the valve port 11, where the energization is only for a short time, so that the movable iron core 3 moves a short distance, the movable iron core 3 enters a range that can be pulled by the permanent magnet 6, and then the pulling force of the permanent magnet 6 resists against the elastic force of the elastic member, so that the movable iron core 3 is stably attracted, as shown in fig. 3, the valve port 11 is opened; on the contrary, when the movable iron core 3 needs to be made to block the valve port 11 again, the power can be turned on to make the magnetic conducting component 4 generate an opposite electromagnetic loop, wherein the traction force of the magnetic conducting component 4 and the elastic force of the elastic member are greater than the traction force of the permanent magnet 6 to the movable iron core 3, so that the movable iron core 3 moves towards the direction close to the valve port 11, and after the movable iron core 3 leaves the permanent magnet 6 within a certain range, the traction force of the permanent magnet 6 to the movable iron core 3 is reduced or disappeared, the traction force of the magnetic conducting component 4 is also disappeared, and the movable iron core 3 is driven by the elastic member to block the valve port 11. In the above process, when the movable iron core 3 moves, the end of the movable iron core 3 is always located in the limiting hole 22, and one end of the movable iron core 3 is limited by the first limiting rib 221 in the limiting hole 22, so that the movable iron core 3 is prevented from deviating from the axis too much under the medium pressure, and the possibility of blocking caused by friction between the movable iron core 3 and the inner wall of the channel 21 is reduced; and because the contact area between the first limiting rib 221 and the movable iron core 3 is small, the friction force between the first limiting rib and the movable iron core is smaller, and the situation of blocking cannot occur.

In the above embodiment, referring to fig. 2, the elastic member is a spring 5; a first step part 23 is formed between the limiting hole 22 and the inner wall of the channel 21; the outer peripheral wall of the movable iron core 3 is provided with a second step part 31; the spring 5 is sleeved on the movable iron core 3, one end of the spring 5 abuts against the first step portion 23, and the other end abuts against the second step portion 31. Wherein, a sealing element 32 is arranged at one end of the movable iron core 3 away from the limiting hole 22, and the sealing adhesive is generally elastic rubber. Because the first limiting rib 221 makes the movable iron core 3 have a certain distance from the inner wall of the limiting hole 22, the spring 5 can be ensured not to contact with the outer peripheral wall of the movable iron core 3, so that only the compression force of the spring 5 acts on the movable iron core 3, and the friction force influencing the moving direction of the movable iron core 3 between the spring 5 and the movable iron core 3 is avoided.

In the above embodiment, referring to fig. 5 and 6, the inner wall of the channel 21 is provided with a plurality of second limiting ribs 211 arranged along the axial direction. So, even great medium pressure makes the axis of movable iron core 3 take place the skew, movable iron core also only part can with the spacing muscle 211 contact of second, area of contact between them is little, avoids movable iron core 3 to hinder the motion by huge frictional force, can further prevent that movable iron core 3 blocks up.

In some specific embodiments, when the moving iron core 3 is closer to the permanent magnet 6, the traction force of the permanent magnet 6 to the moving iron core 3 is larger, and the change curve of the traction force of the permanent magnet 6 to the moving iron core 3 along with the change of the distance has a cliff type drop step, that is, when the distance between the moving iron core 3 and the permanent magnet 6 is within a certain interval, the traction force of the permanent magnet 6 to the moving iron core 3 changes greatly even if the distance changes very slightly; under the influence of medium pressure or external force, the condition that the movable iron core 3 cannot be far away from the permanent magnet 6 even if the magnetic conduction assembly 4 pulls the movable iron core 3 is easy to occur, so that the valve port 11 cannot be closed; in this embodiment, referring to fig. 2 and 3, a non-magnetic-conductive partition plate 24 is disposed between the permanent magnet 6 and the movable iron core 3, the non-magnetic-conductive partition plate 24 is made of a non-magnetic-conductive material, and the non-magnetic-conductive partition plate 24 limits the closest distance between the permanent magnet 6 and the movable iron core 3, so that the distance between the permanent magnet 6 and the movable iron core 3 does not fall within a distance interval of a cliff type fall section, and the change of the traction force between the permanent magnet 6 and the movable iron core 3 does not greatly change, so that the control is more accurate, and the voltage parameter provided to the magnetic conductive assembly 4 is conveniently determined to ensure that the traction force of the magnetic conductive assembly 4 is sufficient to move the movable iron core 3; when the movable iron core 3 is hindered by a certain friction force to move, the traction force of the magnetic conduction assembly 4 is enough to avoid the movable iron core 3 from being blocked.

Preferably, in this embodiment, the non-magnetic-conductive partition 24 and the bobbin 2 are an integral structure, and the non-magnetic-conductive partition 24 is located at one end of the channel 21; the permanent magnet 6 is arranged outside the coil framework 2. So can reduce waterproof sealing structure for the working process is more stable, is more convenient for manufacture. In addition, referring to fig. 4, the coil frame 2 is concavely provided with an embedding cavity 25 for placing the permanent magnet 6, so that the permanent magnet 6 is convenient to assemble.

In the above embodiment, referring to fig. 2-4, the magnetic conducting assembly 4 includes a coil assembly 41 and a magnetic conducting bracket 42, and the coil assembly 41 is wound on the bobbin 2; the magnetic conduction support 42 comprises an upper gland 421 and a lower bottom plate 422, the coil frame 2 is arranged between the upper gland 421 and the lower bottom plate 422, and the permanent magnet 6 is pressed on the coil frame 2 by the upper gland 421. Wherein, this embodiment has saved this part of quiet iron core for under the same circumstances of space volume, electrical control signal intensity, it is longer to move iron core 3, it is stronger to move the magnetic induction intensity of iron core 3, and the switch is more reliable, is more difficult to appear blocking's the condition. And the part of the static iron core is reduced, the problems of processing precision and assembly precision are not required to be considered (when products are produced in large quantity, the tolerance of the static iron core enables the magnetic resistance to have inconsistency in a larger range), the switching precision of the products is improved, and the production cost is also reduced.

Also shown is a solenoid valve comprising the iron core control structure.

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

Claims (9)

1. A core control structure, comprising:

the coil framework, the magnetic conduction assembly, the permanent magnet and the movable iron core;

a channel for the movable iron core to move is arranged in the coil framework, a limiting hole with a smaller diameter than the channel is formed at one end of the channel, and an elastic part for driving the movable iron core to move in a direction away from the limiting hole is arranged in the channel; the inner wall of the limiting hole is provided with a plurality of first limiting ribs arranged along the axial direction;

the permanent magnet is arranged at one end of the channel so as to pull the movable iron core to move towards the direction close to the limiting hole;

the magnetic conduction assembly forms an electromagnetic loop for drawing the movable iron core to move;

and the working stroke of the end part of the movable iron core is always positioned in the limiting hole.

2. The core control structure according to claim 1, wherein the elastic member is a spring; a first step part is formed between the limiting hole and the inner wall of the channel; a second step part is formed on the outer peripheral wall of the movable iron core; the spring is sleeved on the movable iron core, one end of the spring is abutted to the first step part, and the other end of the spring is abutted to the second step part.

3. The core control structure according to claim 2, wherein the inner wall of the channel is provided with a plurality of second limiting ribs arranged along the axial direction.

4. The iron core control structure as claimed in claim 2, wherein a sealing member is disposed on an end of the movable iron core away from the limiting hole.

5. The iron core control structure according to any one of claims 1 to 4, wherein a non-magnetic-conductive partition plate is provided between the permanent magnet and the movable iron core.

6. The core control structure of claim 5, wherein said non-magnetically conductive spacer is integral with said bobbin, said non-magnetically conductive spacer being located at one end of said channel; the permanent magnet is arranged outside the coil framework.

7. The iron core control structure according to claim 6, wherein the coil bobbin is recessed with a recessed cavity for placing the permanent magnet.

8. The core control structure of claim 7, wherein said magnetically conductive assembly comprises a coil assembly and a magnetically conductive support, said coil assembly being wound around said bobbin; the magnetic conduction support comprises an upper gland and a lower bottom plate, the coil framework is arranged between the upper gland and the lower bottom plate, and the permanent magnet is pressed on the coil framework by the upper gland.

9. A solenoid valve comprising the core control structure of any one of claims 1-8.

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