Moving iron core structure and corresponding high durability solenoid valve

Abstract

The utility model provides a kind of movable iron core structure and corresponding high durable solenoid valve, movable iron core structure includes movable iron core body, elastic sheet structure, sealing plug, elastic member and limit cover. Limit cover is fixedly sleeved on the outer periphery of the convex ring part of one side of movable iron core body, elastic sheet structure is sleeved on the outer periphery of convex ring part and is limited between limit cover and movable iron core body. First through-hole is provided on limit cover, second through-hole is provided on movable iron core body, sealing plug is movably arranged in convex ring part, both ends of sealing plug extend in first through-hole and second through-hole respectively, and elastic member is arranged between sealing plug and the inner bottom surface of convex ring part. The utility model is provided with elastic sheet structure and elastic member by composite, when elastic sheet structure drives sealing plug to move to carry out sealing work, elastic member makes sealing plug have elastic activity ability, can buffer the impact of sealing plug and valve core, reduce impact force is small, not easy to cause fatigue aging and damage of sealing plug, high durability, long service life.

Description

Technical Field

[0001] This utility model relates to the field of solenoid valves, and in particular to a moving iron core structure and a corresponding highly durable solenoid valve. Background Technology

[0002] Solenoid valves, as a fundamental component that uses electromagnetic force to control the automatic switching of fluid pathways, are widely used in many fields such as industrial automation, medical devices, environmental water treatment, and household appliances. Their core function is to drive the movement of a moving iron core structure by energizing or de-energizing it, thereby opening or closing the flow channel and achieving precise control of fluids (such as gases and liquids).

[0003] During the operation of a solenoid valve, the electromagnetic force generated by the energized coil attracts the moving iron core, or the moving iron core is reset by spring force or fluid pressure. The sealing plug fixed on the moving iron core contacts or moves away from the valve seat hole. In each working cycle, the sealing plug needs to undergo high-speed impact and compression with the hard valve seat orifice. This frequent mechanical impact can easily lead to plastic deformation, permanent compression deformation, surface wear, or local chipping of the sealing plug. Especially under high pressure differential conditions, the speed and kinetic energy of the sealing plug impacting the valve seat are even greater, further accelerating the fatigue aging and damage process of its material, resulting in a decline in sealing performance and leakage.

[0004] Therefore, it is necessary to provide a moving iron core structure and a corresponding highly durable solenoid valve to solve the above-mentioned technical problems. Utility Model Content

[0005] This invention provides a moving iron core structure and a corresponding highly durable solenoid valve to solve the problem of fatigue aging and damage of the sealing plug of the solenoid valve in the prior art.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: a moving iron core structure, which includes: a moving iron core body, a spring structure, a sealing plug, an elastic element, and a limiting cover;

[0007] The moving iron core body has a protruding ring on one side, the limiting cover is fixedly sleeved on the outer periphery of the protruding ring, and the spring sheet structure is sleeved on the outer periphery of the protruding ring and limited between the limiting cover and the moving iron core body.

[0008] The limiting cover has a first through hole extending axially, and the moving iron core body has a second through hole extending axially at the position corresponding to the convex ring. The sealing plug is movably disposed inside the convex ring. The limiting cover restricts the sealing plug from disengaging from the convex ring. The two ends of the sealing plug extend into the first through hole and the second through hole, respectively. The elastic element is disposed between the sealing plug and the inner bottom surface of the convex ring.

[0009] In this invention, the elastic element is a wave spring, and a positioning groove for connecting the elastic element is provided on the inner bottom surface of the convex ring portion.

[0010] In this invention, the convex ring portion and the moving iron core body are integrally formed.

[0011] In this invention, the diameter of the second through hole is smaller than that of the first through hole, one end of the sealing plug slides in contact with the inner wall of the first through hole, and the other end of the sealing plug slides in contact with the inner wall of the second through hole.

[0012] The sealing plug has a flange on its outer circumference. The outer diameter of the flange is larger than the outer diameters of both ends of the sealing plug. The flange slides in contact with the inner wall of the convex ring. The elastic element is disposed between the flange and the inner bottom surface of the convex ring.

[0013] Furthermore, an annular limiting boss is provided on the inner bottom surface of the convex ring portion. The limiting boss is located inside the elastic member and is used to contact the flange portion to restrict the movement of the sealing plug.

[0014] In this utility model, the spring sheet structure includes an outer ring portion, an inner ring portion, and an elastic strip. The inner ring portion is located inside the outer ring portion, and the elastic strip has a curved structure. Multiple elastic strips are connected between the inner ring portion and the outer ring portion, and the inner ring portion is sleeved on the outer periphery of the convex ring portion.

[0015] This utility model also includes a highly durable solenoid valve, which uses the above-mentioned moving iron core structure, and also includes a coil assembly, a retaining ring, a valve body, and a yoke cylinder.

[0016] A stationary iron core is arranged axially inside the yoke cylinder, and the coil assembly is wound around the outer periphery of the stationary iron core. One end of the valve body and one end of the yoke cylinder are sleeved together to form a valve cavity, and the moving iron core structure is movably arranged inside the valve cavity.

[0017] The valve body is provided with a first conveying through hole and a second conveying through hole connecting the valve cavity and the external space. The stationary iron core is provided with a third conveying through hole connecting the valve cavity and the external space. The sealing plug is used to seal the first conveying through hole or the third conveying through hole, thereby switching to form different conveying channels.

[0018] The fixing ring is sleeved on the outer periphery of the moving iron core body, and the fixing ring is restricted between the spring structure and the yoke cylinder, so that the sealing plug seals the first conveying through hole.

[0019] In this invention, a valve core is detachably connected to the first conveying through hole. The valve core has an inner hole that connects the valve cavity and the external space. The sealing plug contacts the valve core to seal the inner hole.

[0020] In this invention, both the valve core and the stationary iron core are provided with a sealing boss.

[0021] Compared with the prior art, the advantages of this utility model are as follows: The highly durable solenoid valve of this utility model uses a composite spring sheet structure and elastic element. When the spring sheet structure drives the sealing plug to move and perform sealing work, the elastic element enables the sealing plug to have elastic movement capability, which can buffer the impact between the sealing plug and the valve core, reduce the impact force, and is not easy to cause fatigue aging and damage to the sealing plug. It has high durability and long service life. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of this utility model.

[0023] Figure 1 This is a cross-sectional view of a preferred embodiment of the highly durable solenoid valve of this utility model.

[0024] Figure 2 This is an exploded view of the highly durable solenoid valve of this utility model. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] The directional terms mentioned in this utility model, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this utility model, and are not intended to limit this utility model.

[0027] The terms "first" and "second" in this utility model are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as a restriction on the order of events.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, a connection can be a detachable connection or a connection of an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In existing solenoid valves, the sealing plug undergoes high-speed impact and compression against the rigid valve seat during each operating cycle. This frequent mechanical impact easily leads to plastic deformation, compression set, surface wear, or localized chipping of the sealing plug. Especially under high pressure differential conditions, the speed and kinetic energy of the sealing plug impacting the valve seat are even greater, further accelerating the fatigue aging and damage process of the material, resulting in a decline in sealing performance and leakage.

[0030] The following is a preferred embodiment of a highly durable solenoid valve provided by this utility model that can solve the above-mentioned technical problems.

[0031] Please refer to Figure 1 and Figure 2 ,in Figure 1 This is a cross-sectional view of a preferred embodiment of the highly durable solenoid valve of this utility model. Figure 2 This is an exploded view of the highly durable solenoid valve of this utility model.

[0032] In the diagram, units with similar structures are represented by the same labels.

[0033] This embodiment provides a highly durable solenoid valve, which includes a moving iron core structure 14, a coil assembly 13, a retaining ring 15, a valve body 11, and a yoke cylinder 12.

[0034] The moving iron core structure 14 in this embodiment includes a moving iron core body 141, a spring sheet structure 142, a sealing plug 143, an elastic element 144, and a limiting cover 145.

[0035] The moving iron core body 141 has a protruding ring portion 1411 on one side, a limiting cover 145 is fixedly sleeved on the outer periphery of the protruding ring portion 1411, and a spring sheet structure 142 is sleeved on the outer periphery of the protruding ring portion 1411 and limited between the limiting cover 145 and the moving iron core body 141.

[0036] A first through hole is axially provided on the limiting cover 145, and a second through hole is axially provided on the moving iron core body 141 corresponding to the position of the convex ring portion 1411. The sealing plug 143 is movably disposed within the convex ring portion 1411, and the limiting cover 145 restricts the sealing plug 143 within the convex ring portion 1411, preventing the sealing plug 143 from detaching from the convex ring portion 1411. The two ends of the sealing plug 143 extend into the first through hole and the second through hole, respectively, and an elastic member 144 is provided between the sealing plug 143 and the inner bottom surface of the convex ring portion 1411.

[0037] Optionally, the limiting cover 145 can be threaded onto the outer periphery of the convex ring 1411, making it easy to install and remove. After tightening the limiting cover 145, the spring structure 142, the sealing plug 143, and the elastic element 144 can be fixed in place.

[0038] A stationary iron core 121 is arranged axially inside the yoke cylinder 12, and a coil assembly 13 is wound around the outer periphery of the stationary iron core 121. One end of the valve body 11 is sleeved with one end of the yoke cylinder 12 to form a valve cavity, and a moving iron core structure 14 is movably arranged inside the valve cavity.

[0039] The valve body 11 is provided with a first conveying through hole 111 and a second conveying through hole 112 connecting the valve cavity and the external space. The stationary iron core 121 is provided with a third conveying through hole 1211 connecting the valve cavity and the external space. The sealing plug 143 is used to seal the first conveying through hole 111 or the third conveying through hole 1211, thereby switching to form different conveying channels. The elastic force of the spring sheet structure 142 keeps the sealing plug 143 sealing the first conveying through hole 111. When the coil assembly 13 is energized, the stationary iron core 121 generates a magnetic force. Under the magnetic attraction of the stationary iron core 121, the moving iron core structure 14 overcomes the spring sheet structure 142 and moves towards the third conveying through hole 1211, thereby sealing the third conveying through hole 1211.

[0040] In this embodiment, the fixing ring 15 is sleeved on the outer periphery of the moving iron core body 141, and the fixing ring 15 is restricted between the spring structure 142 and the yoke cylinder 12, so that the sealing plug 143 seals the first conveying through hole 111.

[0041] In this embodiment, the moving iron core structure 14 is composed of a spring sheet structure 142 and an elastic element 144. When the spring sheet structure 142 drives the sealing plug 143 to move for sealing, the elastic element 144 enables the sealing plug 143 to have elastic movement capability, which can buffer the impact between the sealing plug 143 and the valve core 16, reduce the impact force, and prevent fatigue aging and damage to the sealing plug 143. It has high durability and long service life.

[0042] In this embodiment, a valve core 16 is detachably connected to the first conveying through hole 111. The valve core 16 has an inner hole that connects the valve cavity and the external space. The sealing plug 143 contacts the valve core 16 to seal the inner hole.

[0043] It should also be noted that, due to the limited space between the convex ring 1411 and the limiting cover 145, it is generally convenient to set an elastic element at one end of the sealing plug 143. It would be optimal if elastic elements could be set at both ends of the sealing plug 143, so as to buffer the impact between the sealing plug 143 and the valve core 16, as well as the impact between the sealing plug 143 and the stationary iron core 121.

[0044] If it is only convenient to set an elastic element at one end of the sealing plug 143, since the elastic force of the spring structure 142 is fixed, it is preferable to set an elastic element 144 at the end of the sealing plug 143 away from the valve core 16. The elastic element 144 buffers the impact between the sealing plug 143 and the valve core 16 after the spring structure 142 drives the sealing plug 143 to move. The magnetic attraction force of the stationary iron core 121 is dynamically controllable, and the sealing impact between the sealing plug 143 and the stationary iron core 121 is relatively controllable.

[0045] In this embodiment, both the valve core 16 and the stationary iron core 121 are provided with protruding sealing bosses to better form a sealing contact with the sealing plug 143.

[0046] In this embodiment, the elastic element 144 is a wave spring. Wave springs have high load-bearing capacity, small size, high space utilization, and long service life. A positioning groove for connecting the elastic element 144 is provided on the inner bottom surface of the convex ring portion 1411, so that the elastic element 144 can be set more stably.

[0047] In this embodiment, the convex ring portion 1411 and the moving iron core body 141 are integrally formed structures with high structural strength and stability.

[0048] In this embodiment, the diameter of the second through hole is smaller than that of the first through hole. One end of the sealing plug 143 slides in contact with the inner wall of the first through hole, and the other end of the sealing plug 143 slides in contact with the inner wall of the second through hole.

[0049] Please refer to Figure 2 The sealing plug 143 has a flange portion 1431 on its outer circumference. The outer diameter of the flange portion 1431 is larger than the outer diameters of both ends of the sealing plug 143. The flange portion 1431 slides in contact with the inner wall of the convex ring portion 1411. An elastic element 144 is disposed between the flange portion 1431 and the inner bottom surface of the convex ring portion 1411. The flange portion 1431 is positioned between the convex ring portion 1411 and the limiting cover 145 to facilitate the movable limitation of the sealing plug 143.

[0050] Furthermore, an annular limiting boss 1412 is provided on the inner bottom surface of the convex ring portion 1411. The limiting boss 1412 is located inside the elastic member 144. The limiting boss 1412 is used to contact the flange portion 1431 to restrict the movement of the sealing plug 143, so that the sealing plug 143 can stably seal the valve core 16.

[0051] Please refer to Figure 2 In this embodiment, the spring sheet structure 142 includes an outer ring portion 1421, an inner ring portion 1422, and an elastic strip 1423. The inner ring portion 1422 is located inside the outer ring portion 1421. The elastic strip 1423 has a curved structure. Multiple elastic strips 1423 are connected between the inner ring portion 1422 and the outer ring portion 1421. The inner ring portion 1422 is sleeved on the outer periphery of the convex ring portion 1411. The spring sheet structure 142 has a stable structure and good and uniform elastic performance.

[0052] The spring structure 142 of the highly durable solenoid valve of this invention has elasticity that keeps the sealing plug 143 sealed in the first delivery through hole 111. When the coil assembly 13 is energized, the stationary iron core 121 generates magnetic force. Under the magnetic attraction of the stationary iron core 121, the moving iron core structure 14 overcomes the spring structure 142 and moves toward the third delivery through hole 1211, thereby sealing the third delivery through hole 1211.

[0053] After the magnetic force on the stationary iron core 121 is removed, the moving iron core structure 14, driven by the elastic force of the spring sheet structure 142, quickly moves towards the valve core 16. When the sealing plug 143 contacts the valve core 16, the sealing plug 143 can still overcome the elastic force of the elastic element 144 and move away from the valve core 16, thereby buffering the impact between the sealing plug 143 and the valve core 16, reducing the impact force, and making it less prone to fatigue aging and damage to the sealing plug 143, resulting in high durability and long service life. Finally, under the combined action of the spring sheet structure 142 and the elastic element 144, the sealing plug 143 will stably seal the valve core 16.

[0054] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A moving iron core structure, characterized in that, include: The moving iron core body, spring sheet structure, sealing plug, elastic element, and limiting cover; The moving iron core body has a protruding ring on one side, the limiting cover is fixedly sleeved on the outer periphery of the protruding ring, and the spring sheet structure is sleeved on the outer periphery of the protruding ring and limited between the limiting cover and the moving iron core body. The limiting cover has a first through hole extending axially, and the moving iron core body has a second through hole extending axially at the position corresponding to the convex ring. The sealing plug is movably disposed inside the convex ring. The limiting cover restricts the sealing plug from disengaging from the convex ring. The two ends of the sealing plug extend into the first through hole and the second through hole, respectively. The elastic element is disposed between the sealing plug and the inner bottom surface of the convex ring.

2. The moving iron core structure according to claim 1, characterized in that, The elastic element is a wave spring, and a positioning groove for connecting the elastic element is provided on the inner bottom surface of the convex ring.

3. The moving iron core structure according to claim 1, characterized in that, The convex ring and the moving iron core body are integrally formed.

4. The moving iron core structure according to claim 1, characterized in that, The diameter of the second through hole is smaller than that of the first through hole. One end of the sealing plug slides in contact with the inner wall of the first through hole, and the other end of the sealing plug slides in contact with the inner wall of the second through hole.

5. The moving iron core structure according to claim 4, characterized in that, The sealing plug has a flange on its outer circumference. The outer diameter of the flange is larger than the outer diameters of both ends of the sealing plug. The flange slides in contact with the inner wall of the convex ring. The elastic element is disposed between the flange and the inner bottom surface of the convex ring.

6. The moving iron core structure according to claim 5, characterized in that, An annular limiting boss is provided on the inner bottom surface of the convex ring portion. The limiting boss is located inside the elastic member and is used to contact the flange portion to restrict the movement of the sealing plug.

7. The moving iron core structure according to claim 1, characterized in that, The spring structure includes an outer ring, an inner ring, and an elastic strip. The inner ring is located inside the outer ring. The elastic strip has a curved structure. Multiple elastic strips are connected between the inner ring and the outer ring. The inner ring is sleeved on the outer periphery of the convex ring.

8. A highly durable solenoid valve, characterized in that, The moving iron core structure according to any one of claims 1-7 further includes a coil assembly, a retaining ring, a valve body, and a yoke cylinder. A stationary iron core is arranged axially inside the yoke cylinder, and the coil assembly is wound around the outer periphery of the stationary iron core. One end of the valve body and one end of the yoke cylinder are sleeved together to form a valve cavity, and the moving iron core structure is movably arranged inside the valve cavity. The valve body is provided with a first conveying through hole and a second conveying through hole connecting the valve cavity and the external space. The stationary iron core is provided with a third conveying through hole connecting the valve cavity and the external space. The sealing plug is used to seal the first conveying through hole or the third conveying through hole, thereby switching to form different conveying channels. The fixing ring is sleeved on the outer periphery of the moving iron core body, and the fixing ring is restricted between the spring structure and the yoke cylinder, so that the sealing plug seals the first conveying through hole.

9. The highly durable solenoid valve according to claim 8, characterized in that, A valve core is detachably connected to the first conveying through hole. The valve core has an inner hole that connects the valve cavity and the external space. The sealing plug contacts the valve core to seal the inner hole.

10. The highly durable solenoid valve according to claim 9, characterized in that, Both the valve core and the stationary iron core are provided with a sealing boss.

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