CN219221425U - Solenoid valve and iron core assembly thereof - Google Patents

Abstract

The utility model relates to the field of fluid control valves, in particular to an electromagnetic valve and an iron core assembly thereof. The utility model discloses an electromagnetic valve and an iron core assembly thereof, wherein the iron core assembly of the electromagnetic valve comprises a first static iron core, a second static iron core, a movable iron core and a sealing plug, the movable iron core is provided with a first end and a second end which are opposite, the first static iron core and the second static iron core are respectively arranged outside the first end and the second end of the movable iron core, and the sealing plug is movably connected with the second end of the movable iron core; along the travel direction of the movable iron core, the sealing plug can move close to or far away from the second end of the movable iron core, and the moving travel of the sealing plug and the second end of the movable iron core is smaller than that of the movable iron core. The valve opening of the utility model is little influenced by the pressure of the fluid, the valve opening and closing performance is stable and reliable, the flow is not influenced, and the cost is hardly increased.

Description

Solenoid valve and iron core assembly thereof

Technical Field

The utility model belongs to the field of fluid control valves, and particularly relates to an electromagnetic valve and an iron core assembly thereof.

Background

Solenoid valves are valve elements that use electromagnetic waves to control the opening or closing of a valve, and may be adapted to control a variety of fluids, including liquids, gases, and the like. The control precision and flexibility of the electromagnetic valve can be ensured, the control is simple, and the electromagnetic valve is widely applied to modern industrial automatic control systems.

The prior iron core component of the pilot electromagnetic valve generally comprises a static iron core, a movable iron core and a sealing plug, wherein the sealing plug is fixedly connected with the movable iron core and cannot move relatively, and the movable iron core moves to drive the sealing plug to seal and block or open a sealing hole (generally a pressure relief hole) of a valve body of the electromagnetic valve so as to realize valve opening/closing. Therefore, when the water pressure is larger, the force required by the movable iron core to drive the sealing plug to leave the sealing hole (valve opening) is larger, namely the larger the required valve opening electromagnetic force is, under the condition that coil windings and power supply voltage are inconvenient, the stroke of the movable iron core is required to be shortened to improve the valve opening performance of the electromagnetic valve (the larger the distance between the movable iron core and the static iron core is, the smaller the magnetic force between the movable iron core and the static iron core is, the smaller the distance between the movable iron core and the static iron core is, the larger the magnetic force between the movable iron core and the static iron core is, but the stroke of the movable iron core is too short, the electromagnetic valve is easy to be unstable, the valve is easy to be automatically opened after the electromagnetic valve is slightly impacted, and the flow is also smaller. However, if the electromagnetic force is increased by increasing the number of turns of the coil winding, the coil volume is increased, which is disadvantageous for miniaturization and greatly increases the cost, although the stroke of the plunger is not required to be shortened.

Disclosure of Invention

The utility model aims to provide an electromagnetic valve and an iron core assembly thereof, which are used for solving the technical problems.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the iron core component of the electromagnetic valve comprises a first static iron core, a second static iron core, a movable iron core and a sealing plug, wherein the movable iron core is provided with a first end and a second end, the first static iron core and the second static iron core are respectively arranged outside the first end and the second end of the movable iron core, and the sealing plug is movably connected with the second end of the movable iron core; along the travel direction of the movable iron core, the sealing plug can move close to or far away from the second end of the movable iron core, and the moving travel of the sealing plug and the second end of the movable iron core is smaller than that of the movable iron core.

Further, the movable iron core sealing device also comprises a connecting rod, wherein the sealing plug is fixedly arranged on the connecting rod, and the connecting rod is movably connected with the second end of the movable iron core.

Further, the second end of the movable iron core is provided with an installation cavity, and the first end of the connecting rod is movably inserted into the installation cavity and is limited to be separated from the installation cavity through the limiting piece.

Furthermore, the limiting piece is a limiting guide sleeve, the limiting guide sleeve is movably sleeved outside the connecting rod, the limiting guide sleeve is fixedly arranged in the mounting cavity, a first limiting convex ring is arranged on the peripheral surface of the first end of the connecting rod, and the first limiting convex ring cannot penetrate through the limiting guide sleeve.

Furthermore, the limiting guide sleeve is in interference fit with the cavity wall of the mounting cavity to be fixed in the mounting cavity.

Further, the novel connecting rod spring comprises a connecting rod spring, the connecting rod spring is sleeved on the connecting rod, and two ends of the connecting rod spring respectively lean against between the first limiting convex ring and the limiting guide sleeve.

Still further, still include retaining ring and retaining ring spring, the retaining ring movable sleeve is established on the first end of connecting rod and is located outside the side of the first end of first spacing bulge loop towards moving the iron core, and retaining ring spring cover is established on the connecting rod and is supported respectively and lean on between retaining ring and the first spacing bulge loop, and the chamber wall of installation chamber is equipped with spacing step, when moving iron core and the mutual attraction of second quiet iron core, spacing step conflict is at the retaining ring and exert the power towards first spacing bulge loop removal to the retaining ring.

Furthermore, the connecting rod spring and the retainer ring spring are compression springs.

Further, the sealing plug is provided with a mounting groove, the inner side wall of the mounting groove is provided with a limiting groove, the second end of the connecting rod is provided with a second limiting convex ring, the second end of the connecting rod is inserted into the mounting groove, and the connecting rod is clamped in the limiting groove through the second limiting convex ring and is fixed in the mounting groove.

The utility model also provides a solenoid valve, which comprises a valve body and a solenoid valve head, wherein the solenoid valve head is arranged on the valve body, and the solenoid valve head is internally provided with the iron core component of the solenoid valve.

The beneficial technical effects of the utility model are as follows:

the valve is little influenced by fluid pressure, the stroke of the movable iron core is not required to be shortened, the performance of the valve is stable and reliable, the flow is not influenced, the number of turns of a coil winding is not required to be increased, the miniaturization is facilitated, and the cost is hardly increased.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a block diagram of a solenoid valve according to a first embodiment of the utility model;

fig. 2 is a sectional view showing a valve-opened state of a solenoid valve according to a first embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a solenoid valve according to a first embodiment of the utility model during valve opening;

fig. 4 is a cross-sectional view of a closed state of a solenoid valve according to a first embodiment of the utility model;

fig. 5 is a structural view of an iron core assembly of a solenoid valve according to a first embodiment of the present utility model;

fig. 6 is an exploded view of a core assembly of a solenoid valve according to a first embodiment of the utility model.

Detailed Description

For further illustration of the various embodiments, the utility model is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present utility model. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The utility model will now be further described with reference to the drawings and detailed description.

As shown in fig. 1-6, a solenoid valve includes a solenoid valve head 1 and a valve body 2, the solenoid valve head 1 is disposed on the valve body 2, an iron core assembly is disposed in the solenoid valve head 1, the iron core assembly includes a first static iron core 11, a second static iron core 12, a movable iron core 13 and a sealing plug 14, in this specific embodiment, a travel direction of the movable iron core 13 is an up-down direction (based on fig. 2-4 as a direction), but the solenoid valve is not limited thereto, and in some embodiments, a travel direction of the movable iron core 13 may be other directions.

The first stationary core 11 and the second stationary core 12 are disposed above and below the movable core 13 (outside the first end and the second end of the movable core 13), respectively, and the movable core 13 is movable in the up-down direction to be close to the first stationary core 11 or the second stationary core 12.

The sealing plug 14 is movably connected with the lower end (second end) of the movable iron core 13; the sealing plug 14 can move close to or away from the second end of the movable iron core 13 along the up-down direction, and the moving stroke of the sealing plug 14 following the second end of the movable iron core 13 is smaller than the stroke of the movable iron core 13. The sealing plug 14 is used for sealing and plugging or opening a hole 21 to be sealed in the valve body 2, the hole 21 to be sealed is located below the sealing plug 14, in this embodiment, the electromagnetic valve is a pilot-operated electromagnetic valve, and the hole 21 to be sealed is a pressure relief hole, but not limited thereto. The valve body 2 in fig. 1 to 4 shows only a valve cover structure, and the structure of the valve body 2 can be specifically referred to the valve body structure of the existing pilot solenoid valve, which is not described in detail.

The electromagnetic valve head 1 is locked and fixed on the valve body 2 through a screw, has good structural stability and is easy to assemble and disassemble, but the electromagnetic valve head is not limited to the above.

In this embodiment, the iron core assembly further includes a connecting rod 15, and the sealing plug 14 is fixedly disposed on a lower end portion of the connecting rod 15, and an upper end portion of the connecting rod 15 is movably connected with a lower end of the movable iron core 13. By arranging the connecting rod 15, the sealing plug 14 is simpler and more convenient to install. The connecting rod 15 can be made of plastic, ceramic, metal and other materials.

The cross section of the connecting rod 15 is preferably circular, so that the structure is more compact, easy to manufacture and smooth to move, but the cross section of the connecting rod 15 is not limited to the above, and in some embodiments, the cross section of the connecting rod 15 may be polygonal, elliptical or other shapes.

The second static iron core 12 is provided with a yielding through hole 121 penetrating up and down, and the lower end of the connecting rod 15 movably penetrates through the yielding through hole 121 and is fixedly connected with the sealing plug 14, so that the structure is more reasonable and compact, and the stability is better.

The lower end surface of the movable iron core 13 is provided with a mounting cavity 131, and the upper end part of the connecting rod 15 is movably inserted into the mounting cavity 131 and is limited to be separated from the mounting cavity 131 by a limiting piece 16, so that the sealing plug 14 can move along the up-down direction to be close to or far from the lower end surface of the movable iron core 13. With this structure, the whole structure is more compact and easy to assemble, but in some embodiments, the connecting rod 15 may also be movably connected with the lower end of the movable iron core 13 by using other existing movable connecting structures, for example, the connecting rod 15 is a telescopic rod, and the top end of the telescopic rod is fixedly connected with the lower end face of the movable iron core 13.

Preferably, in this embodiment, the limiting member 16 is a limiting guide sleeve 161, the limiting guide sleeve 161 is provided with a circular through hole 1611, the limiting guide sleeve 161 is movably sleeved outside the connecting rod 15 through the circular through hole 1611, that is, the outer diameter of the connecting rod 15 is smaller than the diameter of the circular through hole 1611, the limiting guide sleeve 161 is fixedly arranged in the mounting cavity 131, the peripheral surface of the upper end of the connecting rod 15 is provided with a first limiting convex ring 151, the first limiting convex ring 151 is located above the limiting guide sleeve 161, and the outer diameter of the first limiting convex ring 151 is larger than the diameter of the circular through hole 1611 and cannot penetrate through the limiting guide sleeve 161. By providing the limiting guide sleeve 161, the connecting rod 15 can be conveniently assembled and disassembled, but not limited to this, and in some embodiments, the limiting member 16 may be implemented by adopting other existing limiting structures, so long as the connecting rod 15 cannot be separated from the mounting cavity 131.

In this embodiment, the limiting guide sleeve 161 is fixed in the mounting cavity 131 by interference fit with the cavity wall of the mounting cavity 131, and has a simple structure and easy assembly, but is not limited thereto. The limiting guide sleeve 161 can be made of plastic, metal, ceramic and other materials.

The sealing plug 14 is preferably made of rubber material, which has good sealing effect, is easy to realize and has low cost, but not limited thereto, and in some embodiments, the sealing plug 14 may be made of other sealing materials, such as silica gel, etc.

The sealing plug 14 is provided with a mounting groove, the inner side wall of the mounting groove is provided with a limiting groove 141, the lower end of the connecting rod 15 is provided with a second limiting convex ring 152, the lower end of the connecting rod 15 is inserted in the mounting groove and is fixed in the mounting groove by being clamped in the limiting groove 141 through the second limiting convex ring 152, the sealing plug 14 and the connecting rod 15 are convenient to assemble, the connecting stability is good, the sealing effect of the sealing plug 14 is further improved, but the sealing plug is not limited to the above, and in some embodiments, the sealing plug 14 can be fixed at the lower end of the connecting rod 15 by adopting other existing fixing structures.

Further, the iron core assembly further comprises a connecting rod spring 17, the connecting rod spring 17 is arranged in the mounting cavity 131 of the movable iron core 13, the connecting rod spring 17 is sleeved outside the connecting rod 15, the upper end of the connecting rod spring 17 abuts against the first limiting convex ring 151, and the lower end of the connecting rod spring 17 abuts against the limiting guide sleeve 161. The connecting rod spring 17 is used for applying upward moving force to the connecting rod 15, so that the sealing plug 14 is far away from the hole 21 to be sealed in the valve opening state, the flow is ensured, the stability and the reliability of valve opening are improved, meanwhile, the connecting rod spring 17 is arranged in the mounting cavity 131 of the movable iron core 13, the connecting rod spring 17 is not easy to fall off, and the assembly and the maintenance are easy.

The connecting rod spring 17 is preferably realized by adopting a compression spring, has simple structure, good stability, easy realization and low cost, but is not limited to the structure.

In this embodiment, the check ring 18 and the check ring spring 19 are further included, the check ring 18 is movably sleeved on the upper end of the connecting rod 15 and can move a certain distance along the up-down direction, the check ring 18 is located above the first limiting convex ring 151, the check ring spring 19 is sleeved on the connecting rod 15 and respectively abuts against the space between the check ring 18 and the first limiting convex ring 151, the cavity wall of the installation cavity 131 is provided with a limiting step 1311, when the movable iron core 13 and the second static iron core 12 are mutually attracted (in a valve closing state), the limiting step 1311 abuts against the check ring 18, and the check ring 18 is applied with a force moving towards the first limiting convex ring 151 to enable the check ring 18 to compress the check ring spring 19, so that the connecting rod 15 and the sealing plug 14 are enabled to be subjected to downward elastic force through the check ring spring 19, the sealing plug 14 is enabled to be better attached to the hole 21 to be sealed, and no water leakage is ensured.

The retainer spring 19 is preferably implemented by a compression spring, and has the advantages of simple structure, good stability, easy implementation and low cost, but is not limited thereto.

Specifically, the upper end of the connecting rod 15 is provided with a neck portion 153, and the retainer ring 18 is movably sleeved on the neck portion 153.

In this embodiment, the electromagnetic valve head 1 further includes a coil support 100, a coil winding 101, and the like, and more specific structure can refer to the existing electromagnetic valve head, which can be easily realized by those skilled in the art, and will not be described in detail.

The working process comprises the following steps:

when the valve is opened: the valve opening pulse is applied to the coil winding 101, the movable iron core 13 moves upwards (moves towards the valve opening direction) under the action of electromagnetic force, and the connecting rod 15 and the movable iron core 13 can relatively move at the moment, and the sealing plug 14 does not move yet, so that the movable iron core 13 only needs to overcome the self weight and the elasticity of the connecting rod spring 17, and the required magnetic force is smaller regardless of the water pressure; when the movable iron core 13 moves to the first limit collar 151 of the connecting rod 15 against the limit guide sleeve 161, as shown in fig. 3, the movable iron core 13 starts to drive the connecting rod 15 to move upwards, so as to drive the sealing plug 14 to move upwards, at this time, the movable iron core 13 moves towards the first static iron core 11 for a distance, the distance between the movable iron core 13 and the first static iron core 11 is reduced, the magnetic force born by the movable iron core 13 increases, even if the water pressure increases, the connecting rod 15 can be pulled to move upwards with the sealing plug 14 to separate from the hole 21 to be sealed until the valve is completely opened, and meanwhile, the connecting rod spring 17 resets to drive the connecting rod 15 to move upwards relative to the movable iron core 13, so that when the valve is completely opened, the sealing plug 14 is far away from the hole 21 to be sealed, as shown in fig. 2, namely, the valve opening is influenced by the fluid pressure to be small, the stroke of the movable iron core 13 is not required to be shortened, the flow is not influenced, the performance of the switching valve is stable and reliable, the number of turns of coils is not required to be increased, the coil winding is favorable for miniaturization, and the cost is not increased.

When the valve is closed, valve closing pulse is applied to the coil winding 101, the movable iron core 13 moves towards the second static iron core 12 under the action of electromagnetic force, the connecting rod 15 is pushed to move downwards with the sealing plug 14, when the sealing plug 14 plugs the hole 21 to be sealed, the movable iron core 13 continues to move towards the second static iron core 12 until the movable iron core is attracted with the second static iron core 12, and the valve closing is completed, in the process, the movable iron core 13 pushes the retainer ring 18 to move downwards to compress the retainer ring spring 19, so that the retainer ring spring 19 applies downward elastic force to the connecting rod 15 and the sealing plug 14, and the sealing plug 14 better plugs the hole 21 to be sealed to ensure no water leakage.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims (10)

1. An iron core subassembly of solenoid valve, its characterized in that: the device comprises a first static iron core, a second static iron core, a movable iron core and a sealing plug, wherein the movable iron core is provided with a first end and a second end which are opposite, the first static iron core and the second static iron core are respectively arranged outside the first end and the second end of the movable iron core, and the sealing plug is movably connected with the second end of the movable iron core; along the travel direction of the movable iron core, the sealing plug can move close to or far away from the second end of the movable iron core, and the moving travel of the sealing plug and the second end of the movable iron core is smaller than that of the movable iron core.

2. The solenoid valve core assembly of claim 1, wherein: still include the connecting rod, sealed end cap is fixed to be set up on the connecting rod, and the second end swing joint of connecting rod and movable iron core.

3. The solenoid valve core assembly of claim 2, wherein: the second end of the movable iron core is provided with an installation cavity, and the first end of the connecting rod is movably inserted into the installation cavity and is limited to be separated from the installation cavity through the limiting piece.

4. A solenoid valve core assembly according to claim 3 wherein: the limiting piece is a limiting guide sleeve, the limiting guide sleeve is movably sleeved outside the connecting rod, the limiting guide sleeve is fixedly arranged in the mounting cavity, a first limiting convex ring is arranged on the peripheral surface of the first end of the connecting rod, and the first limiting convex ring cannot penetrate through the limiting guide sleeve.

5. The solenoid valve core assembly of claim 4, wherein: the limiting guide sleeve is in interference fit with the cavity wall of the installation cavity and is fixed in the installation cavity.

6. The solenoid valve core assembly of claim 4, wherein: the connecting rod spring is sleeved on the connecting rod, and two ends of the connecting rod spring respectively lean against between the first limiting convex ring and the limiting guide sleeve.

7. The solenoid valve core assembly of claim 6, wherein: still include retaining ring and retaining ring spring, the retaining ring movable sleeve is established on the first end of connecting rod and is located outside the side of the first end of first spacing bulge loop towards moving the iron core, and retaining ring spring cover is established on the connecting rod and is supported respectively between retaining ring and the first spacing bulge loop, and the chamber wall of installation chamber is equipped with spacing step, when moving iron core and the mutual suction of second quiet iron core, spacing step contradicts and exerts the power that moves towards first spacing bulge loop to the retaining ring at the retaining ring.

8. The solenoid valve core assembly of claim 7, wherein: the connecting rod spring and the retainer ring spring are compression springs.

9. The solenoid valve core assembly of claim 2, wherein: the sealing plug is provided with a mounting groove, the inner side wall of the mounting groove is provided with a limiting groove, the second end of the connecting rod is provided with a second limiting convex ring, the second end of the connecting rod is inserted in the mounting groove, and the connecting rod is clamped in the limiting groove through the second limiting convex ring and is fixed in the mounting groove.

10. The utility model provides a solenoid valve, includes valve body and solenoid valve head, and the solenoid valve head sets up on the valve body, its characterized in that: an iron core component of the electromagnetic valve as claimed in any one of claims 1-9 is arranged in the electromagnetic valve head.

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