Electromagnetic valve opening degree segmented adjusting mechanism

Abstract

The utility model discloses an electromagnetic valve opening degree segmented adjusting mechanism which comprises a valve seat, and a valve element used for opening and closing a valve is arranged in the valve seat. The electromagnetic driving assembly is arranged in the valve seat and located above the valve element. The electromagnetic driving assembly comprises a movable piece capable of moving up and down, the movable piece is provided with a first abutting-pushing part and a second abutting-pushing part which are located at different heights, and the first abutting-pushing part is located below the second abutting-pushing part. The elastic assembly comprises a first elastic piece and a second elastic piece; the first elastic piece is elastically supported on the lower end face of the valve element, and the second elastic piece is located above the valve element and provided with an open hole allowing the first abutting and pushing part to penetrate through. When the movable piece moves towards the valve element, the first abutting-pushing part can penetrate through the second elastic piece and abut against the valve element. And along with the continuous movement of the movable piece, the second pushing part can be pushed against the second elastic piece. According to the utility model, segmented control of the opening degree of the moving part is realized, and the control precision of flow is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valve flow control, in particular to a solenoid valve opening segmented regulating mechanism. Background Art

[0002] The solenoid valve is the main component for fluid flow control. The motor supplies power to the electromagnetic coil so that the moving core can push the valve core to move under electromagnetic drive, and then the opening of the valve core is used to control the flow of the fluid. However, in existing solenoid valves, the opening of the valve core is usually controlled by a single spring, resulting in a relatively simple change in the opening of the valve core, making it difficult to accurately control the flow. In addition, since it only relies on a single spring control, the consistency requirements of the spring are high during production, which invisibly increases the difficulty of production. Utility Model Content

[0003] In order to overcome the above shortcomings, the purpose of the utility model is to provide a solenoid valve opening segmented adjustment mechanism, which on the one hand realizes segmented control of the opening of the moving part to improve the control accuracy of the flow rate, and on the other hand reduces the consistency requirements of the spring through segmented control.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a solenoid valve opening segmented adjustment mechanism, comprising

[0005] A valve seat, wherein a valve core for opening and closing the valve is arranged in the valve seat;

[0006] An electromagnetic drive assembly is built into the valve seat and is located above the valve core; the electromagnetic drive assembly includes a moving part that can move up and down under the action of the electromagnetic drive part, and the moving part is provided with a first push part and a second push part located at different heights, and the first push part is located below the second push part;

[0007] The elastic component comprises a first elastic member and a second elastic member; the second elastic member is located above the valve core and is provided with an opening for the first push portion to pass through;

[0008] When the movable member moves toward the valve core, the first pushing portion can pass through the second elastic member and push against the valve core; as the movable member continues to move, the second pushing portion can push against the second elastic member.

[0009] The beneficial effects of the utility model are:

[0010] When the movable member moves toward the valve core (i.e., moves downward), first, the first push portion can pass through the second elastic member and push against the valve core (the second elastic member is not in contact with the movable member), and the valve core moves downward accordingly. At this time, since the first elastic member elastically supports the valve core, the first elastic member is compressed by force and can generate an upward reaction force F1 on the movable member through the valve core; as the movable member continues to move downward, the second push portion can move downward until it pushes against the second elastic member, and the second elastic member is then compressed by force and can generate an upward reaction force F1 on the movable member. The movable member is subjected to the reaction forces F1 and F2 of the first elastic member and the second elastic member at the same time; that is, in the whole process of the electromagnetic driving part driving the movable member to move toward the valve core, when the movable member moves in the first stage (the second pushing part is not in contact with the second elastic member), it only needs to overcome the reaction force F1 applied by the first elastic member; when the movable member moves in the second stage (the second pushing part is in contact with the second elastic member), it needs to overcome the reaction forces F1 and F2 applied by the first elastic member and the second elastic member at the same time.

[0011] Since the moving part has different reaction forces to overcome in the first and second stages, its requirements for the electromagnetic driving force applied by the electromagnetic driving part are also different. By using different electromagnetic driving forces to overcome different reaction forces and drive the moving part to move, segmented control of the opening of the moving part can be achieved, and different openings will produce different flow rates, which is conducive to improving the control accuracy of the flow rate; in addition, in the second stage, the first elastic part and the second elastic part can apply reaction forces at the same time, thereby reducing the requirements for the processing consistency of a single elastic part.

[0012] Specifically, the movable member includes a push rod, and the push rod includes the first push portion and the second push portion, and the outer diameter of the second push portion is greater than the outer diameter of the first push portion. The structural definition of the first push portion and the second push portion facilitates the cooperation between the push rod and the second elastic member during the downward movement. In addition, the stroke of the first stage can be adjusted by adjusting the length of the first push portion in the vertical direction.

[0013] Furthermore, a guide round head is provided at one end of the first push portion facing the valve core to facilitate the first push portion to pass through the opening.

[0014] Furthermore, the second elastic member includes a spring sheet, the middle portion of which is provided with the opening, the inner diameter of which is larger than the outer diameter of the first push portion and smaller than the outer diameter of the second push portion. When the push rod moves toward the second elastic member, the first push portion can pass through the opening because the inner diameter of the opening is larger than the outer diameter of the first push portion; and the second push portion can abut against the spring sheet because the inner diameter of the opening is smaller than the outer diameter of the second push portion.

[0015] Further, the spring sheet includes a connecting ring and a fixing ring which are arranged inside and outside, the fixing ring is pressed into the valve seat, and the connecting ring is provided with the opening. The connecting ring and the fixing ring are connected by at least one elastic arm. When the second pushing portion pushes against the connecting ring of the spring sheet, since the fixing ring is pressed into the valve seat, the position of the fixing ring is relatively fixed. As the second pushing portion continues to move downward, the connecting ring moves downward immediately, and can drive the elastic arm to stretch and deform. Exemplarily, 3, 4, 5, 6, etc. elastic arms may be provided. Furthermore, the fixing ring may be a closed-loop structure or an open-loop structure. When an open-loop structure is adopted, the fixing ring includes a plurality of arc-shaped pieces arranged one-to-one in correspondence with the elastic arms, a spacing is left between two adjacent arc-shaped pieces, and the arc-shaped pieces are connected to the corresponding elastic arms.

[0016] Furthermore, the spring piece includes a connecting ring with the opening, and a plurality of radially distributed spring arms are connected to the outer side wall of the connecting ring, and the ends of the plurality of spring arms away from the connecting ring are crimped onto the valve seat. The spring piece of this structure directly crimps the ends of the spring arms onto the valve seat to eliminate the structural features of the fixing ring. Furthermore, the end of the spring arm away from the connecting ring is thickened to increase the crimping area between the spring arm and the valve seat.

[0017] Furthermore, the spring sheet includes a fixing ring crimped into the valve seat, and the inner wall of the fixing ring is evenly distributed with a plurality of spring arms distributed in a circular array and extending toward the center of the circle, and the side of the plurality of spring arms extending toward the center of the fixing ring together forms the opening.

[0018] Furthermore, the movable member further comprises a movable iron core, and one end of the second push portion away from the first push portion is integrally provided with a push rod connecting portion fixedly connected to the movable iron core. The movable iron core is provided to cooperate with the magnetic attraction of the electromagnetic driving portion.

[0019] Furthermore, the movable iron core and the push rod connecting portion are fixedly connected by crimping, welding or integral molding.

[0020] Furthermore, the first elastic member is elastically supported on the lower end surface of the valve core, and comprises a spring sleeved on the valve core, with two ends of the spring respectively abutting against the valve core and the valve seat.

[0021] Furthermore, the valve seat includes a seat body, and the seat body is provided with a partition plate for dividing the interior into an upper chamber and a lower chamber. The upper chamber is used to accommodate the electromagnetic drive component, and the lower chamber is used to accommodate the elastic component and the valve core; the partition plate is also provided with a push rod channel for the push rod to pass through.

[0022] Furthermore, the electromagnetic driving part includes an electromagnetic coil and a fixed iron core, and the fixed iron core is located on a side of the moving part away from the valve core. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional schematic diagram of the solenoid valve opening segmented adjustment mechanism of the embodiment of the utility model;

[0024] Figure 2 for Figure 1 A partial enlarged view of the A part;

[0025] Figure 3 It is a cross-sectional schematic diagram of a moving part of an embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the push rod according to an embodiment of the utility model;

[0027] Figure 5 It is a schematic diagram of a deformation structure of a push rod according to an embodiment of the utility model;

[0028] Figure 6 A schematic diagram of another deformed structure of the push rod according to an embodiment of the utility model;

[0029] Figure 7 A schematic diagram of another deformed structure of the push rod according to an embodiment of the utility model;

[0030] Figure 8 This is a schematic structural diagram of a second elastic member according to an embodiment of the utility model;

[0031] Fig. 9 A schematic diagram of a spring sheet deformation structure according to an embodiment of the utility model;

[0032] Fig.10 A schematic diagram of another deformed structure of the spring piece according to an embodiment of the utility model;

[0033] Fig.11 A schematic diagram of another deformed structure of the spring piece according to an embodiment of the utility model;

[0034] Fig.12 A schematic diagram of another deformed structure of the spring piece according to an embodiment of the utility model;

[0035] Fig.13 It is a schematic cross-sectional view of a seat body according to an embodiment of the present utility model.

[0036] In the figure:

[0037] 1-valve seat; 11-upper chamber; 12-lower chamber; 13-separation plate; 131-push rod channel;

[0038] 2-valve core;

[0039] 3-Electromagnetic drive unit;

[0040] 4-moving member; 41-first push portion; 411-guide round head; 42-second push portion; 421-push rod connecting portion; 43-movable iron core; 431-embedded groove; 44-reinforcement portion; 45-limiting portion;

[0041] 51 - first elastic member; 52 - second elastic member; 521 - opening; 522 - connecting ring; 523 - fixing ring; 5231 - arc-shaped piece; 524 - elastic arm. DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0043] It should be noted that all technical and scientific terms used in the present invention have the same meanings as those generally understood by technicians in the technical field of the present application; the terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" in the specification and claims of the present application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0044] In the description of the present invention, the terms "upper", "lower", "top", "bottom", "length", "width", "thickness" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, and the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively. These are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0045] It should also be noted that, in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "provided with", "installed", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through other components; it can be a mechanical connection or an electrical connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. In addition, the drawings are all in a very simplified form and use non-precise ratios, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present utility model.

[0046] In addition, the reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0047] Example

[0048] See attached Figure 1-3 As shown, a solenoid valve opening sectional adjustment mechanism of the utility model comprises a valve seat 1, an electromagnetic drive assembly, and an elastic assembly, wherein a valve core 2 for opening and closing the valve is provided in the valve seat 1. The electromagnetic drive assembly is built into the valve seat 1 and is located above the valve core 2, and comprises a moving part 4 that can move up and down under the action of the electromagnetic drive part 3, and the moving part 4 is provided with a first push part 41 and a second push part 42 located at different heights, and the first push part 41 is located below the second push part 42. The elastic assembly comprises a first elastic part 51 and a second elastic part 52; the first elastic part 51 is elastically supported on the lower end surface of the valve core 2, and the second elastic part 52 is located above the valve core 2, and is provided with an opening 521 for the first push part 41 to pass through.

[0049] When the movable member 4 moves toward the valve core 2 (i.e., moves downward), first the first pushing portion 41 can pass through the second elastic member 52 and push against the valve core 2 (the second elastic member 52 and the movable member 4 are not in contact during this process), and the valve core 2 moves downward accordingly. At this time, since the first elastic member 51 is elastically supported on the valve core 2, the first elastic member 51 is compressed by force and can generate an upward reaction force F1 on the movable member 4 through the valve core 2; then the movable member 4 overcomes the reaction force F1 under the action of the electromagnetic drive unit 3 and continues to move downward until the second pushing portion 42 moves downward and pushes against the second elastic member 52, and the second elastic member 52 is then compressed by force and can generate an upward reaction force F2 on the movable member 4. At this time, the movable member 4 is simultaneously subjected to the reaction forces F1 and F2 of the first elastic member 51 and the second elastic member 52; then the movable member 4 overcomes the reaction forces F1 and F2 at the same time under the action of the electromagnetic drive unit 3 and continues to move downward. That is, in the whole process that the electromagnetic drive unit 3 drives the movable member 4 to move toward the valve core 2, when the movable member 4 moves in the first stage (the second push portion 42 is not in contact with the second elastic member 52), the electromagnetic driving force applied by the electromagnetic drive unit 3 to the movable member 4 only needs to overcome the reaction force F1 applied by the first elastic member 51 to control the opening of the movable member 4; and when the movable member 4 moves in the second stage (the second push portion 42 is in contact with the second elastic member 52), the electromagnetic driving force applied by the electromagnetic drive unit 3 to the movable member 4 needs to simultaneously overcome the reaction forces F1 and F2 applied by the first elastic member 51 and the second elastic member 52, and then control the opening of the movable member 4.

[0050] Compared with the prior art, the present application adds a second elastic member 52 and adjusts the structure of the movable member 4. During the entire process of the movable member 4 moving downward, the electromagnetic drive unit 3 drives the movable member 4 in two stages. In the first stage, the movable member 4 does not contact the second elastic member 52, and the movable member 4 is only subjected to the reaction force F1 applied by the first elastic member 51; in the second stage, the first push portion 41 of the movable member 4 abuts against the valve core 2, and the second push portion 42 of the movable member 4 abuts against the second elastic member; the movable member 4 is simultaneously subjected to the reaction force F1 applied by the first elastic member 51. The reaction force F1 applied by the first elastic member 51 and the reaction force F2 applied by the second elastic member 52; in these two stages, the electromagnetic driving force applied by the electromagnetic driving unit 3 on the movable member 4 is different, and by overcoming the reaction forces of different stages and controlling the movement of the movable member 4 through different electromagnetic driving forces, the segmented control of the moving opening of the movable member 4 can be achieved, and different openings will produce different flow rates, which is conducive to improving the control accuracy of the solenoid valve flow rate, and at the same time, it can also achieve precise control of the specific positions of the movable member 4 and the valve core 2, so as to facilitate the flow control at a specific position. In addition, in the second stage, the first elastic member 51 and the second elastic member 52 can simultaneously apply a reaction force to the movable member 4, thereby reducing the requirements for the processing consistency of a single elastic member.

[0051] In actual application, the magnitude of the reaction forces F1 and F2 can be adjusted by adjusting the stiffness of the first elastic member 51 and the second elastic member 52; by adjusting the height of the first push portion 41 and the second push portion 42, the length of the stroke of the first stage (that is, the stroke controlled by the reaction force F1 alone) and the length of the stroke of the second stage (that is, the stroke controlled by the reaction forces F1 and F2 together) can be adjusted.

[0052] In some embodiments, see Appendix Figure 3-5 As shown, the movable member 4 includes a push rod, and the push rod includes a first push portion 41 and a second push portion 42 that are integrally formed and coaxially arranged, and the outer diameter of the second push portion 42 is larger than the outer diameter of the first push portion 41. Exemplarily, the push rod is a stepped cylindrical structure, the first push portion 41 is a small cylindrical structure, and the second push portion 42 is a large cylindrical structure. By limiting the structure of the first push portion 41 and the second push portion 42, the purpose of allowing the first push portion 41 to pass through the opening 521 while the second push portion 42 cannot pass through the opening 521 can be achieved, so as to cooperate with the action of the second elastic member 52. Furthermore, in order to facilitate the first push portion 41 to pass through the opening 521, see the attached Figure 4 As shown, a guide round head 411 is provided at one end of the first push portion 41 facing the valve core 2 , and the guide round head 411 can be a truncated cone structure or a hemispherical structure.

[0053] It should be noted that the shape of the push rod is not limited, and shapes such as square, elliptical, and triangular can be selected according to actual needs. When other non-circular structures such as square, elliptical, and triangular are selected, the outer diameters of the first push portion 41 and the second push portion 42 are the maximum dimensions of the first push portion and the second push portion along the direction perpendicular to the movement of the push rod.

[0054] In some embodiments, see Appendix Figure 2-4 As shown, the movable member 4 also includes a movable iron core 43, and the second push portion 42 of the push rod is integrally provided with a push rod connecting portion 421 fixedly connected to the movable iron core 43 at one end away from the first push portion 41. The cross-sectional area of ​​the push rod connecting portion 421 is greater than the cross-sectional area of ​​the second push portion 42. Exemplarily, the cross-sectional area of ​​the push rod connecting portion 421 is an elliptical structure, and the cross-sectional area of ​​the second push portion 42 is a circular structure. Furthermore, a groove 431 is provided at the lower end of the movable iron core 43, and the push rod connecting portion 421 is embedded in the groove 431 and fixed in the groove 431 by crimping, welding or integral molding. When the electromagnetic drive unit 3 drives the movable member 4 to move, a material that can produce a magnetic attraction is required. Therefore, when the movable member 4 also includes a movable iron core 43, it is only necessary that the movable iron core 43 is an iron material that can produce a magnetic attraction, and the push rod can be made of other non-magnetic materials.

[0055] In some embodiments, the push rod may also adopt other deformation structures. Figure 6 As shown, a reinforcing portion 44 is provided between the push rod connecting portion 421 and the second push portion 42 and is coaxially arranged with the second push portion 42. The outer diameter of the reinforcing portion 44 is greater than the outer diameter of the second push portion 42. Figure 7 As shown, a limiting portion 45 is coaxially arranged at one end of the first push portion 41 away from the second push portion 42, and the outer diameter of the limiting portion 45 is larger than the outer diameter of the first push portion 41 and smaller than the inner diameter of the opening 521. During assembly, the push rod is inserted into the opening 521, and the first push portion 41 is located in the opening 521. At this time, the second push portion 42 and the limiting portion 45 are respectively located on both sides of the opening 521. The setting of the limiting portion 521 can limit the moving path of the second push portion.

[0056] In some embodiments, see Appendix Figure 1-2 As shown, the first elastic member 51 includes a spring mounted on the valve core 2 in the vertical direction, and the two ends of the spring respectively abut against the valve core 2 and the valve seat 1. When the movable member 4 pushes the valve core 2 to move downward, the spring can be compressed because the position of the valve seat 1 remains unchanged. It should be noted that the first elastic member 51 can also adopt other elastic structures that can abut between the valve core 2 and the valve seat 1, as long as it can achieve elastic deformation.

[0057] In some embodiments, see Appendix Figure 2 ,8 As shown, the second elastic member 52 includes an elastic sheet, and an opening 521 is opened in the middle of the elastic sheet, and the inner diameter of the opening 521 is larger than the outer diameter of the first push portion 41, and smaller than the outer diameter of the second push portion 42. When the push rod moves toward the second elastic member 52, the first push portion 41 can pass through the opening 521 because the inner diameter of the opening 521 is larger than the outer diameter of the first push portion 41; and the second push portion 42 cannot pass through the opening 521 because the inner diameter of the opening 521 is smaller than the outer diameter of the second push portion 42, and then directly abuts on the elastic sheet.

[0058] For further information, see Appendix Figure 8 As shown, the spring piece includes a connecting ring 522 and a fixing ring 523 arranged inside and outside. The fixing ring 523 is pressed into the valve seat 1. The connecting ring 522 is provided with an opening 521 for the first push portion 41 to pass through. The connecting ring 522 and the fixing ring 523 are connected by at least one elastic arm 524. For example, see the attached Figure 8 , 9 As shown, the number of elastic arms is not limited, and 3, 4, 5, 6, etc., can be provided.

[0059] When the push rod moves downward, the first pushing portion 41 can pass through the opening 521 until the second pushing portion 42 pushes on the connecting ring 522 of the spring sheet. At this time, since the fixing ring 523 is crimped into the valve seat 1, the position of the fixing ring 523 is relatively fixed. As the second pushing portion 42 continues to move downward, the connecting ring 522 moves downward immediately and can drive the elastic arm 524 to stretch and deform.

[0060] Furthermore, the elastic arm 524 is in an "S"-shaped structure, and its two ends are respectively fixedly connected to the outer wall of the connecting ring 522 and the inner wall of the fixing ring 523. Designing the elastic arm 524 as an "S"-shaped structure can improve its deformation ability to a certain extent. Exemplarily, three elastic arms 524 are evenly distributed between the connecting ring 522 and the fixing ring 523.

[0061] It should be noted that the structure of the spring sheet can be deformed according to actual needs. For example, the fixing ring 523 can be designed as an open ring structure. Fig.10 As shown, the fixing ring 523 includes a plurality of arc-shaped pieces 5231 arranged one by one corresponding to the elastic arms 524, a spacing is left between two adjacent arc-shaped pieces 5231, and the arc-shaped pieces 5231 are connected to the corresponding elastic arms 524. During installation, the arc-shaped pieces 5231 are pressed into the valve seat 1 in sequence, and the stability of the positions of the arc-shaped pieces 5231 can be ensured by pressing the valve seat 1 against the arc-shaped pieces 5231.

[0062] As in some embodiments, see the attached Fig.11As shown, the spring piece includes a connecting ring 522 with an opening 521, and a plurality of radially distributed spring arms 524 are connected to the outer wall of the connecting ring 522, and one end of the plurality of spring arms 524 away from the connecting ring 522 is crimped on the valve seat 1. The spring piece of this structure directly crimps the end of the spring arm 524 on the valve seat 1 to eliminate the structural features of the fixing ring 523, thereby simplifying the spring piece structure. Furthermore, the end of the spring arm 524 away from the connecting ring 522 is thickened to increase the crimping area between the spring arm 524 and the valve seat 1.

[0063] As in some embodiments, see the attached Fig.12 As shown, the spring sheet includes a fixing ring 523 crimped into the valve seat 1, and the inner side wall of the fixing ring 523 is evenly distributed with a plurality of elastic arms 524 distributed in a circumferential array and extending toward the center of the circle, and the side of the plurality of elastic arms 524 extending toward the center of the fixing ring together forms an opening 521. The spring sheet of this structure directly uses the gaps between the plurality of elastic arms 524 as the opening 521 to eliminate the structural feature of the connecting ring 522. In this structure, the second push portion 42 directly pushes against the elastic arm 524. Furthermore, the end of the elastic arm 524 forming the opening 521 is thickened.

[0064] In some embodiments, see Appendix Figure 1 , 13 As shown, the valve seat 1 includes a seat body, and a partition plate 13 is provided in the seat body to divide the interior thereof into an upper chamber 11 and a lower chamber 12. The upper chamber 11 is used to accommodate the electromagnetic drive component, and the lower chamber 12 is used to accommodate the elastic component and the valve core 2. The partition plate 13 is also provided with a push rod channel 131 for the push rod to pass through.

[0065] It should be noted that when the spring piece is in a natural state, the lower end surfaces of the spring arm 524 and the connecting ring 522 do not contact the valve core 2 , and the upper end surfaces of the spring arm 524 and the connecting ring 522 do not contact the partition plate 13 .

[0066] In some embodiments, the electromagnetic drive unit 3 includes an electromagnetic coil and a fixed iron core, and the fixed iron core is located on the side of the movable member 4 away from the valve core 2. Applying electromagnetic driving force to the movable member 4 by means of an electromagnetic coil is a conventional technique in the art and is not described in detail in this embodiment.

[0067] The above implementation modes are only for illustrating the technical concept and features of the utility model, and their purpose is to allow people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A solenoid valve opening adjustment mechanism, characterized in that: include A valve seat, wherein a valve core for opening and closing the valve is arranged in the valve seat; An electromagnetic drive assembly is built into the valve seat and is located above the valve core; the electromagnetic drive assembly includes a moving part that can move up and down under the action of the electromagnetic drive part, and the moving part is provided with a first push part and a second push part located at different heights, and the first push part is located below the second push part; The elastic component comprises a first elastic member and a second elastic member; the second elastic member is located above the valve core and is provided with an opening for the first push portion to pass through; When the movable member moves toward the valve core, the first pushing portion can pass through the second elastic member and push against the valve core; as the movable member continues to move, the second pushing portion can push against the second elastic member.

2. The solenoid valve opening adjustment mechanism according to claim 1, characterized in that: The movable member includes a push rod, and the push rod includes the first push portion and a second push portion. The outer diameter of the second push portion is greater than the outer diameter of the first push portion.

3. The solenoid valve opening adjustment mechanism according to claim 2, characterized in that: A guide round head is provided at one end of the first push portion facing the valve core.

4. The solenoid valve opening adjustment mechanism according to claim 2, characterized in that: The second elastic member includes a spring sheet, a middle portion of which is provided with the opening, an inner diameter of the opening being larger than an outer diameter of the first pushing portion and smaller than an outer diameter of the second pushing portion.

5. The solenoid valve opening adjustment mechanism according to claim 4, characterized in that: The spring sheet comprises a connecting ring and a fixing ring which are arranged inside and outside. The fixing ring is pressed into the valve seat, and the connecting ring is provided with the opening. The connecting ring and the fixing ring are connected by at least one elastic arm.

6. The solenoid valve opening adjustment mechanism according to claim 4, characterized in that: The spring sheet comprises a connecting ring with the opening, and a plurality of radially distributed spring arms are connected to the outer side wall of the connecting ring, and one end of the plurality of spring arms away from the connecting ring is pressed onto the valve seat.

7. The solenoid valve opening adjustment mechanism according to claim 4, characterized in that: The spring sheet includes a fixing ring crimped into the valve seat, and the inner wall of the fixing ring is evenly distributed with a plurality of spring arms distributed in a circular array and extending toward the center of the circle, and the side of the plurality of spring arms extending toward the center of the fixing ring together forms the opening.

8. The solenoid valve opening adjustment mechanism according to claim 2, characterized in that: The movable member further comprises a movable iron core, and one end of the second push portion away from the first push portion is integrally provided with a push rod connecting portion fixedly connected to the movable iron core.

9. The solenoid valve opening adjustment mechanism according to claim 8, characterized in that: The movable iron core and the push rod connecting portion are fixedly connected by crimping, welding or integral molding.

10. The solenoid valve opening adjustment mechanism according to claim 1, characterized in that: The first elastic member is elastically supported on the lower end surface of the valve core, and comprises a spring sleeved on the valve core, with two ends of the spring respectively abutting against the valve core and the valve seat.

11. The solenoid valve opening adjustment mechanism according to claim 2, characterized in that: The valve seat includes a seat body, and a partition plate is provided in the seat body for dividing the interior of the seat into an upper chamber and a lower chamber. The upper chamber is used to accommodate the electromagnetic drive component, and the lower chamber is used to accommodate the elastic component and the valve core; the partition plate is also provided with a push rod channel for the push rod to pass through.

12. The solenoid valve opening adjustment mechanism according to claim 1, characterized in that: The electromagnetic driving part comprises an electromagnetic coil and a fixed iron core, and the fixed iron core is located at a side of the moving part away from the valve core.

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