CN218063590U

CN218063590U - Iron core control structure and control valve

Info

Publication number: CN218063590U
Application number: CN202220974187.5U
Authority: CN
Inventors: 刘兴华; 刘善明
Original assignee: Ganzhou Runtong Electric Appliance Co ltd
Current assignee: Ganzhou Runtong Electric Appliance Co ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2022-12-16
Anticipated expiration: 2032-04-25

Abstract

The utility model discloses an iron core control structure, which comprises a valve body, wherein a coil framework is arranged on the valve body, a cavity is arranged in the coil framework, and a movable iron core is arranged in the cavity; the coil framework is provided with a magnetic conduction assembly, and the magnetic conduction assembly forms an electromagnetic loop for drawing the movable iron core; the movable iron core is positioned in the range of the electromagnetic circuit, the other part of the movable iron core is positioned outside the range of the electromagnetic circuit, the part of the movable iron core positioned in the range of the electromagnetic circuit is of a cylindrical structure without steps and holes, and the part of the movable iron core positioned outside the range of the electromagnetic circuit is provided with an elastic piece. The part of the movable iron core, which is pulled by the electromagnetic circuit, is of a cylindrical structure without steps and holes, so that the magnetic flux of the movable iron core can be maximized in the cavity of the coil framework, and the traction force on the movable iron core can be improved under the condition that the conditions such as voltage and current, the number of turns of the coil, the volume of the control valve and the like are constant.

Description

Iron core control structure and control valve

Technical Field

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

Background

The control valve is a device for controlling medium flow, for example, chinese patent with publication number CN208152176U discloses a solenoid valve component for a toilet, which comprises a main body joint, a first connecting pipe port of the main body joint is provided with a pulse solenoid valve for skirt washing, a second connecting pipe port of the main body joint is provided with a pulse solenoid valve for bottom washing, the upper part of the main body joint is provided with an anti-siphon core mounting hole, the upper part of the main body joint is provided with an anti-siphon device, the anti-siphon device comprises an anti-siphon cover, an anti-siphon core is arranged in the anti-siphon cover, an anti-siphon spring is arranged between the anti-siphon core and the main body joint, an anti-siphon rubber membrane is arranged between the anti-siphon core and the anti-siphon cover, and an air inlet is arranged on the anti-siphon cover; the lower part of the main body joint is provided with a liquid inlet, a flow regulator is arranged in the liquid inlet, and the main body joint is also provided with a cleaning interface. The existing control valve has some disadvantages, such as 1, the existing control valve comprises a structure combining a movable iron core and a static iron core, the movable iron core is adsorbed by the static iron core in a magnetic conduction manner so as to open or close the control valve, when the structures of the static iron core and the movable iron core are assembled, the sealing performance of the structure needs to be increased, parts such as a sealing ring and the like need to be added, the precision requirement on processed parts is very high due to the fact that more parts need to be controlled to accumulate tolerance problems and the like, the complexity of a valve body structure is increased, and the assembly difficulty is increased; 2. the movable iron core is provided with the elastic parts such as the spring and the like to apply driving force to the movable iron core, and the outer wall of the movable iron core is provided with the step or the end part of the movable iron core is provided with the hole, so that the matching of the spring and the movable iron core is realized, however, the magnetic flux of the movable iron core can be weakened, the driving force of the movable iron core pulled by electromagnetism is reduced, and the situation that the control valve is not opened or closed stably easily occurs.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides an iron core control structure and a control valve, which can solve one of the above problems to a great extent.

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

an iron core control structure comprises a valve body, wherein a coil framework is arranged on the valve body, a cavity is arranged in the coil framework, and a movable iron core is arranged in the cavity; the coil framework is provided with a magnetic conduction assembly, and the magnetic conduction assembly forms an electromagnetic loop for drawing the movable iron core; the movable iron core is positioned in the range of the electromagnetic circuit, the other part of the movable iron core is positioned outside the range of the electromagnetic circuit, the part of the movable iron core positioned in the range of the electromagnetic circuit is of a cylindrical structure without steps and holes, and the part of the movable iron core positioned outside the range of the electromagnetic circuit is provided with an elastic piece.

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 magnetic conducting bracket is arranged outside the cavity; when the coil assembly is electrified, the coil assembly, the magnetic conduction bracket and the movable iron core form an electromagnetic loop.

As a further alternative of the iron core control structure, a permanent magnet is arranged on the coil framework, and the permanent magnet is positioned outside the cavity and corresponds to one end of the movable iron core; the permanent magnet is positioned between the coil framework and the magnetic conduction bracket.

As a further alternative of the iron core control structure, a groove is formed in the coil skeleton, and the permanent magnet is arranged in the groove.

As a further alternative of the iron core control structure, the direction of the driving force applied to the movable iron core by the elastic member is opposite to the direction in which the movable iron core is pulled by the permanent magnet.

As a further alternative of the iron core control structure, a pilot chamber is arranged on the valve body, the pilot chamber is communicated with a cavity of the coil framework, and a pilot hole is arranged in the pilot chamber; the end part of the movable iron core is connected with a plug for plugging the pilot hole; the resilient member is located within the pilot chamber.

As a further alternative of the iron core control structure, the elastic element is a spring sleeved on the movable iron core, and the diameter of the plug is larger than that of the movable iron core; one end of the spring is abutted against the plug, and the other end of the spring is abutted against the internal structure of the pilot chamber.

As a further alternative of the iron core control structure, a connecting part with a T-shaped section is arranged at the end part of the movable iron core, a connecting groove with a T-shaped section is concavely arranged on the plug, and the connecting part is arranged in the connecting groove to form a buckle connection; the movable iron core is of a cylindrical structure without steps and holes except for the connecting part.

As a further alternative of the iron core control structure, the magnetic conductive bracket comprises a cover body and a bottom plate, an accommodating cavity with an opening is arranged in the cover body, and the bottom plate is arranged at the opening of the accommodating cavity; the bottom plate is provided with a through hole, and the coil framework is arranged in the accommodating cavity of the cover body; and part of the coil framework penetrates through the through hole so as to realize that part of the movable iron core is positioned outside the range of the electromagnetic circuit.

The iron core control structure has the beneficial effects that: the part of the movable iron core, which is pulled by the electromagnetic circuit, is of a cylindrical structure without steps and openings, so that the magnetic flux of the movable iron core can be maximized in the cavity of the coil framework, the pulling force on the movable iron core can be improved under the condition that the conditions such as voltage and current, the number of turns of the coil, the volume of the control valve and the like are constant, and the condition that the control valve cannot be opened is avoided; on the basis, the upper limit of the elastic force of the elastic piece acting on the movable iron core can also be improved, so that the sealing pressure of the movable iron core to the pilot hole is larger, and the situation that the control valve cannot be closed is avoided.

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

a control valve comprises any one of the iron core control mechanisms.

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 cross-sectional view of an iron core control structure according to the present invention;

FIG. 2 is a schematic diagram of an electromagnetic circuit driving a movable iron core to be close to a permanent magnet;

FIG. 3 is a schematic diagram of an electromagnetic circuit driving a movable iron core away from a permanent magnet;

fig. 4 is an explosion structure diagram of an iron core control structure according to the present invention;

fig. 5 is an exploded schematic view of an iron core control structure according to the present invention;

FIG. 6 is a schematic diagram of a control valve including the core control structure;

fig. 7 is a schematic cross-sectional view of a control valve incorporating the ferrite core control structure.

In the figure: 1. a valve body; 11. a pilot chamber; 12. a pilot hole; 2. a coil bobbin; 21. a chamber; 22. a groove; 3. a movable iron core; 31. a connecting portion; 4. a magnetic conductive component; 41. a magnetic conductive bracket; 411. a cover body; 4111. an accommodating chamber; 412. a base plate; 4121. perforating; 42. a coil assembly; 43. a permanent magnet; 5. an elastic member; 6. and (7) a plug.

Detailed Description

The technical solutions in the embodiments of the present invention will be described below clearly and completely, and it should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in 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; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. 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. 1-4, an iron core control structure is shown, which includes a valve body 1, a coil frame 2 is provided on the valve body 1, a cavity 21 is provided in the coil frame 2, and a movable iron core 3 is provided in the cavity 21; the coil framework 2 is provided with a magnetic conduction assembly 4, and the magnetic conduction assembly 4 forms an electromagnetic loop for drawing the movable iron core 3; the part that moves iron core 3 is located the within range of electromagnetic circuit, and another part is located outside the scope of electromagnetic circuit, the part that moves iron core 3 and is located the electromagnetic circuit within range is the cylinder structure of no step, no trompil, it is equipped with elastic component 5 to move iron core 3 and be located the part outside the electromagnetic circuit within range.

In other words, the part of the movable iron core 3 pulled by the electromagnetic circuit is of a cylindrical structure without steps and holes, so that the magnetic flux of the movable iron core 3 can be maximized in the cavity 21 of the coil framework 2, and under the condition that the voltage current, the number of turns of the coil, the volume of the control valve body 1 and the like are constant, the traction force on the movable iron core 3 can be improved, and the condition that the control valve cannot be opened is avoided; on the basis, the upper limit of the elastic force of the elastic member 5 acting on the movable iron core 3 can be increased, so that the sealing pressure of the movable iron core 3 to the pilot hole 12 is larger, and the situation that the control valve cannot be closed is avoided.

In the above solution, specifically, referring to fig. 1 and fig. 4, a pilot chamber 11 is arranged on the valve body 1, the pilot chamber 11 is communicated with a cavity 21 of the coil bobbin 2, and a pilot hole 12 is arranged in the pilot chamber 11; the end part of the movable iron core 3 is connected with a plug 6 for plugging the pilot hole 12; the resilient member 5 is located in the pilot chamber 11. The elastic part 5 is a spring sleeved on the movable iron core 3, and the diameter of the plug 6 is larger than that of the movable iron core 3; one end of the spring abuts against the plug 6, and the other end abuts against the internal structure of the pilot chamber 11. The internal structure of the pilot chamber 11 does not necessarily have to be the inner wall of the valve body 1, and referring to fig. 1, the structure of the bobbin 2 protrudes into the pilot chamber 11, and this structure may also be referred to as the internal structure of the pilot chamber 11, that is, the spring may abut against the bobbin 2.

In the above embodiment, in order to facilitate the connection between the movable iron core 3 and the plug 6, referring to fig. 1 and 4, a connecting portion 31 with a T-shaped cross section is disposed at an end of the movable iron core 3, a connecting groove with a T-shaped cross section is concavely disposed on the plug 6, and the connecting portion 31 is disposed in the connecting groove to form a snap connection; in this embodiment, the movable iron core 3 has a cylindrical structure without steps and openings, except for the connecting portion 31.

In some specific embodiments, referring to fig. 1, 3 and 4, the magnetically conductive assembly 4 comprises a coil assembly 42 and a magnetically conductive support 41, and the magnetically conductive support 41 is disposed outside the chamber 21; when the coil assembly 42 is energized, the coil assembly 42, the magnetic conductive bracket 41 and the movable iron core 3 form an electromagnetic circuit. So, utilize the outside magnetic conduction subassembly 4 of coil skeleton 2 pulls moving iron core 3, has left out the quiet iron core that should set up originally in coil skeleton 2, has consequently also left out the seal structure between quiet iron core and the coil skeleton 2 for the structure is simpler, reduction in production cost and the assembly degree of difficulty, has promoted production efficiency.

In the above embodiment, referring to fig. 1 and 4, a permanent magnet 43 is disposed on the coil frame 2, and the permanent magnet 43 is located outside the cavity 21 and corresponds to one end of the movable iron core 3; the permanent magnet 43 is located between the coil bobbin 2 and the magnetic conductive bracket 41. In this embodiment, the direction of the driving force applied to the movable iron core 3 by the elastic member 5 is opposite to the direction in which the movable iron core 3 is pulled by the permanent magnet 43.

In the embodiment, when the valve needs to be opened, a pulse forward voltage signal with a certain width is input to the coil assembly 42 through a lead, the working magnetic flux generated by the coil assembly 42 and the forward electromagnetic force overcome the acting force of the elastic member 5 to enable the movable iron core 3 to move upwards until the movable iron core 3 collides with the limiting position in the direction of the permanent magnet 43, the movable iron core 3 is still attracted under the magnetic force of the permanent magnet 43 after the pulse voltage signal is ended, and the valve is kept in an open state; when the valve needs to be closed, a pulse reverse voltage signal with a certain width is input to the coil assembly 42 through a lead, working magnetic flux generated by the coil assembly 42 overcomes the magnetic force of the permanent magnet 43, the reverse electromagnetic force enables the movable iron core 3 to move downwards until the plug 6 butts against the pilot hole 12, and the valve keeps a closed state under the action of the elastic element 5.

In addition, in order to install the permanent magnet 43, a groove 22 is formed in the coil bobbin 2, and the permanent magnet 43 is disposed in the groove 22. The groove can be in a horn-shaped structure with a large opening and a small bottom, so that the permanent magnet 43 can be conveniently placed in the groove 22, and the production efficiency is improved.

In the above specific solution, referring to fig. 3 and fig. 4, the magnetic conductive bracket 41 includes a cover 411 and a bottom plate 412, an accommodating cavity 4111 with an opening is provided in the cover 411, and the bottom plate 412 is provided at the opening of the accommodating cavity 4111; a through hole 4121 is formed in the bottom plate 412, and the coil bobbin 2 is disposed in the accommodating cavity 4111 of the cover 411; the coil bobbin 2 is partially passed through the through hole 4121 to achieve that the movable core 3 is partially out of the range of the electromagnetic circuit. Wherein a sealing structure is formed between the cover 411 and the bottom plate 412, and a sealing structure is formed between the bottom plate 412 and the valve body 1; in this embodiment, the cover 411 is cup-shaped and is reversely buckled on the bottom plate 412.

Referring to fig. 5 and 6, there is also provided a control valve including any one of the above-described plunger control mechanisms.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the 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

1. An iron core control structure is characterized by comprising a valve body, wherein a coil framework is arranged on the valve body, a cavity is arranged in the coil framework, and a movable iron core is arranged in the cavity; the coil framework is provided with a magnetic conduction assembly, and the magnetic conduction assembly forms an electromagnetic loop for drawing the movable iron core; the movable iron core is positioned in the range of the electromagnetic circuit, the other part of the movable iron core is positioned outside the range of the electromagnetic circuit, the part of the movable iron core positioned in the range of the electromagnetic circuit is of a cylindrical structure without steps and holes, and the part of the movable iron core positioned outside the range of the electromagnetic circuit is provided with an elastic piece.

2. The core control structure of claim 1, wherein the magnetically conductive assembly comprises a coil assembly and a magnetically conductive support, the magnetically conductive support being disposed outside the cavity; when the coil assembly is electrified, the coil assembly, the magnetic conduction support and the movable iron core form an electromagnetic loop.

3. The iron core control structure according to claim 2, wherein a permanent magnet is disposed on the coil bobbin, and the permanent magnet is located outside the cavity and corresponds to one end of the movable iron core; the permanent magnet is positioned between the coil framework and the magnetic conduction bracket.

4. The iron core control structure according to claim 3, wherein a groove is provided on the coil bobbin, and the permanent magnet is disposed in the groove; the groove is of a horn-shaped structure with a large opening and a small bottom.

5. The core control structure according to claim 3, wherein the driving force applied to the movable core by the elastic member is in a direction opposite to a direction in which the movable core is pulled by the permanent magnet.

6. The iron core control structure according to claim 1, wherein a pilot chamber is provided on the valve body, the pilot chamber being in communication with the cavity of the bobbin, the pilot chamber being provided with a pilot hole therein; the end part of the movable iron core is connected with a plug for plugging the pilot hole; the elastic member is located in the pilot chamber.

7. The iron core control structure according to claim 6, wherein the elastic member is a spring sleeved on the movable iron core, and the diameter of the plug is larger than that of the movable iron core; one end of the spring is abutted against the plug, and the other end of the spring is abutted against the inner structure of the pilot chamber.

8. The iron core control structure according to claim 7, wherein the end of the movable iron core is provided with a connecting part with a T-shaped cross section, the plug is concavely provided with a connecting groove with a T-shaped cross section, and the connecting part is arranged in the connecting groove to form a snap connection; the movable iron core is of a cylindrical structure without steps and holes except the connecting part.

9. The iron core control structure according to claim 2, wherein the magnetic conductive bracket comprises a cover body and a bottom plate, an accommodating cavity with an opening is arranged in the cover body, and the bottom plate is arranged at the opening of the accommodating cavity; the bottom plate is provided with a through hole, and the coil framework is arranged in the accommodating cavity of the cover body; and part of the coil framework penetrates through the through hole so as to realize that part of the movable iron core is positioned outside the range of the electromagnetic loop.

10. A control valve comprising a core control mechanism according to any one of claims 1 to 9.