Electromagnetic valve and control system
By using variable stiffness springs in solenoid valves to adjust the movement of the moving core, the problem of slow impact and power outage response of the moving core is solved, faster power outage response and higher current are achieved, cost and part quantity are reduced, and product accuracy and consistency are improved.
Patent Information
- Application Number
- CN202422588764.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-25
AI Technical Summary
Existing solenoid valves require smaller power-off current and slower power-off response when the core is absorbed and closed.
Using a variable stiffness spring design, the movement of the moving core is adjusted to reduce impact and noise by setting segments of different elastic coefficients between the moving core and the fixed core, and quickly separate the moving core and the fixed core during power outage to improve the power outage response and current.
Effectively reduce impact and noise of the moving iron core, improve the response speed and current of power failure, reduce the number and cost of parts, and improve product consistency and accuracy.
Smart Images
Figure CN223137113U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of control valves, and particularly relates to a solenoid valve and a control system. Background Technique
[0002] Solenoid valves are usually constructed as two-position two-way normally open or normally closed valves. After the solenoid valve is powered on, in order to ensure rapid opening, the electromagnetic force received by the armature will be relatively large, and there will be a large impact and noise when the armature is attracted. Moreover, there will be a great magnetic force between the attracted armature and the magnetic pole, making it difficult for the armature to return easily. The excessive magnetic force will require a smaller power-off current and a slower power-off response during the closing process of the solenoid valve.
[0003] Therefore, there are two major defects in the existing solenoid valves during use: one is the impact of the moving iron core during attraction, and the other is the requirement for a smaller power-off current and a slower power-off response during closing. Content of the Utility Model
[0004] The technical problems to be solved by the utility model are the impact of the moving iron core during attraction and the requirement for a smaller power-off current and a slower power-off response during closing. The purpose is to provide a solenoid valve and a control system to solve the above problems.
[0005] The utility model is realized through the following technical solutions:
[0006] In a first aspect, the utility model provides a solenoid valve, which includes a housing, a valve seat and a valve core;
[0007] The housing is connected to the valve seat through a sleeve;
[0008] The valve core includes a fixed iron core fixed on the housing, a moving iron core slidably arranged in the housing, and a closing body for controlling the opening and closing of the valve seat. The fixed iron core and the moving iron core are connected by a variable stiffness spring, and the closing body is connected to the moving iron core and extends to the valve seat;
[0009] Correspondingly, when the solenoid valve is powered on, the moving iron core slides relative to the fixed iron core along the guide sleeve, so that the closing body moves accordingly to control the opening and closing of the valve seat.
[0010] In a possible design, the variable stiffness spring includes at least two segments, and the elastic coefficients of each segment are not equal to each other.
[0011] In a possible design, the variable stiffness spring includes a first segment with an elastic coefficient of K1 and a second segment with an elastic coefficient of K2, and K1≠K2.
[0012] In a possible design, the variable stiffness spring is selected as a variable pitch spring or a variable mean diameter spring.
[0013] In a possible design, when the variable stiffness spring includes two segments, one of the segments has a variable pitch or a variable mean diameter;
[0014] When the variable stiffness spring includes more than two segments, at least one segment is configured with a standard pitch and a standard mean diameter, and at least one segment has a variable pitch or a variable mean diameter.
[0015] In a possible design, the end of the moving iron core facing the fixed iron core is provided with a concave hole. The end of the closing body is inserted into the concave hole and connected to the moving iron core, and there is an annular gap between the concave hole and the closing body. Correspondingly, the variable stiffness spring is inserted into the annular gap.
[0016] In a possible design, the closing body includes a main shaft and a sealing plate. The main shaft has two ends, one of which is inserted on the moving iron core, the other end passes through the sliding hole and extends towards the valve seat. The end of the main shaft is adjacent to the sealing platform of the valve seat, and the sealing plate is fixed on the end face of the sealing platform facing the valve seat.
[0017] In a possible design, the sealing plate is made of rubber material.
[0018] In a possible design, the valve seat is made of plastic material, and the valve seat is injection molded and connected to the sleeve.
[0019] In a second aspect, the present utility model provides a control system, including the solenoid valve described above.
[0020] Compared with the prior art, the present utility model has the following advantages and beneficial effects:
[0021] 1. The segment of the variable stiffness spring adjacent to the fixed iron core is designed with a larger elastic coefficient to solve the problems of the impact and noise of the moving iron core, and at the same time, it can also be used to separate the fixed iron core and the moving iron core during the power-off process, obtaining a faster power-off response and a higher power-off current;
[0022] 2. The variable stiffness spring can save space, make the solenoid valve more lightweight, reduce the number of parts and the assembly process, lower the cost, and contribute to improving the accuracy of the parts and the consistency of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings. In the drawings:
[0024] Figure 1 Schematic structural diagram of a solenoid valve when it is configured as a normally closed valve.
[0025] Figure 2 When constructed as a normally open valve, a schematic structural diagram of a solenoid valve.
[0026] Figure 3 A schematic diagram of the elastic coefficient curve of a variable stiffness spring.
[0027] Figure 4 and Figure 5 When the pitch is variable, a schematic structural diagram of a variable stiffness spring.
[0028] Figure 6 and Figure 7 When the mean diameter is variable, a schematic structural diagram of a variable stiffness spring.
[0029] Reference numerals in the drawings and corresponding component names:
[0030] 1. Housing; 2. Valve seat; 3. Spool; 301. Fixed iron core; 302. Moving iron core; 303. Closing body; 304. Main shaft; 305. Sealing plate; 4. Sleeve; 5. Variable stiffness spring. Detailed implementation manners
[0031] To make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present utility model are only used to explain the present utility model and are not intended to limit the present utility model.
[0032] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present utility model. However, it will be apparent to those of ordinary skill in the art that: It is not necessary to employ these specific details to practice the present utility model. In other embodiments, well-known structures, circuits, materials or methods have not been specifically described in order to avoid obscuring the present utility model.
[0033] Throughout the specification, references to "one embodiment", "embodiment", "one example" or "example" mean that a particular feature, structure or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present utility model. Thus, the phrases "one embodiment", "embodiment", "one example" or "example" appearing throughout the specification do not necessarily all refer to the same embodiment or example. Furthermore, the specific features, structures or characteristics may be combined in any suitable combination and / or sub-combination in one or more embodiments or examples. In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only and are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.
[0034] In the description of the present utility model, the orientation or positional relationship indicated by the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "high", "low", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the protection scope of the present utility model.
[0035] Embodiment:
[0036] As Figures 1-7 shown, a solenoid valve includes a housing 1, a valve seat 2 and a valve core 3;
[0037] The housing 1 is connected to the valve seat 2 through a sleeve 4;
[0038] The valve core 3 includes a fixed iron core 301 fixed on the housing 1, a movable iron core 302 slidably disposed in the housing 1, and a closing body 303 for controlling the opening and closing of the valve seat 2. The fixed iron core 301 is connected to the movable iron core 302 through a variable stiffness spring 5, and the closing body 303 is connected to the movable iron core 302 and extends to the valve seat 2;
[0039] Correspondingly, when the solenoid valve is energized, the movable iron core 302 slides relative to the fixed iron core 301 along the guide sleeve, so that the closing body 303 moves accordingly and controls the opening and closing of the valve seat 2.
[0040] The solenoid valve adopts a variable stiffness spring 5 to solve the problems that occur in the existing solenoid valve during use. The variable stiffness spring 5 includes a plurality of segments, and each segment can be designed with a different elastic coefficient. At different positions where the movable iron core 302 moves, the elastic coefficient of the corresponding segment is adjusted, so as to adjust the movement of the movable iron core 302. Specifically:
[0041] When the solenoid valve is attracted, when the movable iron core 302 is about to complete its stroke, the movable iron core 302 moves under the action of electromagnetic force and will hit the fixed iron core 301. At this time, the stiffness of the variable stiffness spring 5 of the corresponding segment increases, its elastic coefficient increases, and the elastic force generated by the compression of the variable stiffness spring 5 is also greater. The elastic force acts on the movable iron core 302 and is used for decelerating the movable iron core 302, thereby reducing the impact and noise.
[0042] During the power-off process of the solenoid valve, the fixed iron core 301 and the moving iron core 302 are attracted and have a large attraction force. After power-off, the current gradually decreases, and it is difficult for the moving iron core 302 to separate from the fixed iron core 301 at a relatively high current during the process of the current decreasing. At this time, the variable stiffness spring 5 at this section has a relatively large elastic coefficient, and the elastic force provided by the variable stiffness spring 5 is used to separate the fixed iron core 301 and the moving iron core 302. During the power-off process, the moving iron core 302 can more easily get rid of the adsorption of the fixed iron core 301, which can not only reduce the requirement for the current, but also obtain a faster power-off response and a higher power-off current.
[0043] That is, the section of the variable stiffness spring 5 adjacent to the fixed iron core 301 is designed with a relatively large elastic coefficient to solve the problems of the impact and noise of the moving iron core 302. At the same time, it can also be used to separate the fixed iron core 301 and the moving iron core 302 during the power-off process to obtain a faster power-off response and a higher power-off current. Correspondingly, at other sections, the variable stiffness spring 5 is designed with other elastic coefficients to adapt to the movement of the moving iron core 302.
[0044] At the same time, since using the variable stiffness spring 5 can solve the problems existing in the prior art, the solenoid valve can reduce structural modifications, simplify the structure, and thus reduce the economic cost of improvement. Moreover, the variable stiffness spring 5 can save space, make the solenoid valve lighter, reduce the number of parts and the assembly process, reduce costs, and help improve the accuracy of parts and the consistency of products.
[0045] For the outer shell 1 and the valve seat 2, these two can be constructed into any suitable shape to adapt to different working environments.
[0046] During operation, after being powered on, the moving iron core 302 slides relative to the fixed iron core 301, and the sliding direction of the moving iron core 302 is controlled by controlling the current direction, and finally the purpose of controlling the opening and closing of the valve seat 2 is achieved.
[0047] In a possible implementation, the variable stiffness spring 5 includes at least two sections, and the elastic coefficients of each section are not equal to each other. Based on the above design scheme, generally, the section adjacent to the fixed iron core 301 has a relatively large elastic coefficient, and the section far from the fixed iron core 301 has a relatively small elastic coefficient. The former is used to solve the technical problems existing in the existing solenoid valve, and the elastic force generated after the latter is deformed is relatively small, which helps to reduce the resistance during the movement of the moving iron core 302 and improve the speed of the moving iron core 302. If necessary, the number of sections of the variable stiffness spring 5 can also be increased to meet the corresponding working needs.
[0048] Optionally, as Figure 3 shown, the variable stiffness spring 5 includes a first section with an elastic coefficient of K1 and a second section with an elastic coefficient of K2, and K1≠K2. Among them, Figure 3In the figure, L1 is the electromagnetic force curve, L2 represents the variable stiffness spring 5, L3 represents the ordinary spring, F is the electromagnetic force, and S is the deformation of the variable stiffness spring 5.
[0049] When the deformation of the variable stiffness spring 5 is larger, the moving iron core 302 is closer to the fixed iron core 301, that is, closer to the closing point. At this time, the elastic coefficient of the variable stiffness spring 5 is the larger elastic coefficient K2, and the elastic force generated by the compression of the variable stiffness spring 5 is also greater. The elastic force acts on the moving iron core 302 and is used for decelerating the moving iron core 302. Further, during the power-off process, the elastic force that the variable stiffness spring 5 can provide is greater, and the moving iron core 302 can more easily break away from the adsorption of the fixed iron core 301.
[0050] In a possible implementation, as Figures 4-7 shown, the variable stiffness spring 5 is selected as a variable pitch spring or a variable mean diameter spring. Based on the above design scheme, that is, by changing the pitch or the mean diameter to adjust the elastic coefficient of the corresponding segment. Among them, taking the standard pitch as the reference, the variable pitch can either increase the pitch or decrease the pitch; similarly, taking the standard mean diameter as the reference, the variable mean diameter can either increase the mean diameter or decrease the mean diameter.
[0051] It is easy to understand that those skilled in the art can make a choice according to the actual working conditions, and the present utility model does not make any restrictions on this.
[0052] Optionally, when the variable stiffness spring 5 includes two segments, one of the segments has a variable pitch or a variable mean diameter.
[0053] Optionally, when the variable stiffness spring 5 includes more than two segments, at least one segment is configured with a standard pitch and a standard mean diameter, and at least one segment has a variable pitch or a variable mean diameter.
[0054] Based on this, for the specific variable stiffness scheme, that is, the number of variable stiffness segments and the variable stiffness method, those skilled in the art can flexibly combine them, and there are various schemes to adapt to different working requirements, improving the adaptability and practicality of the solenoid valve.
[0055] In a possible implementation, the end of the moving iron core 302 facing the fixed iron core 301 is provided with a concave hole. The end of the closing body 303 is inserted into the concave hole and connected to the moving iron core 302, and there is an annular gap between the concave hole and the closing body 303. Correspondingly, the variable stiffness spring 5 is inserted into the annular gap. Based on the above design scheme, on the one hand, the contact area between the moving iron core 302 and the closing body 303 is increased, improving the reliability of their connection. On the other hand, a space for installing the variable stiffness spring 5 is reserved, which helps to reduce the volume of the solenoid valve.
[0056] In a possible implementation, the closing body 303 includes a main shaft 304 and a sealing plate 305. The main shaft 304 has two ends, one of which is inserted into the moving iron core 302, and the other end passes through the sliding hole and extends towards the valve seat 2. The end of the main shaft 304 is adjacent to the sealing table of the valve seat 2, and the sealing plate 305 is fixed on the end face of the sealing table facing the valve seat 2. Based on the above design, the length of the main shaft 304 can be designed as required, and the sealing plate 305 is used to contact and seal the valve seat 2. When the moving iron core 302 slides, both the main shaft 304 and the sealing plate 305 move accordingly. When the sealing plate 305 abuts against the valve seat 2, the valve seat 2 is closed, and when the sealing plate 305 moves away from the valve seat 2, the valve seat 2 is opened.
[0057] Optionally, the sealing plate 305 is made of rubber material. Based on the above design, by selecting rubber material, the sealing plate 305 not only has good waterproof performance but also has elasticity. It can not only relieve the impact force between the sealing plate 305 and the valve seat 2 but also improve the sealing performance through deformation.
[0058] It is easy to understand that the sealing plate 305 can also be made of any other suitable material.
[0059] In a possible implementation, the valve seat 2 is made of plastic material, and the valve seat 2 is injection-molded and connected to the sleeve 4. Based on the above design, injection molding can produce products of various shapes and sizes, which helps to adapt to different working environments and has precise dimensions, so that the solenoid valve meets the high-precision usage requirements.
[0060] Based on this embodiment of the solenoid valve, a control system is introduced. The control system includes the solenoid valve described above. Based on the above design, on the basis of the solenoid valve, the control system can also include any other suitable functional modules, with richer functions to meet different working requirements and better practicability. And it is easy to understand that the functional modules can be selected from any suitable existing equipment, with a wide selection range.
[0061] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present invention. It should be understood that the above description is only the specific embodiments of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A solenoid valve, characterized in that, It includes a housing (1), a valve seat (2) and a valve core (3); The housing (1) is connected to the valve seat (2) through a sleeve (4); The valve core (3) includes a stationary iron core (301) fixed on the housing (1), a moving iron core (302) slidably arranged in the housing (1), and a closing body (303) for controlling the opening and closing of the valve seat (2). The stationary iron core (301) is connected to the moving iron core (302) through a variable stiffness spring (5), and the closing body (303) is connected to the moving iron core (302) and extends to the valve seat (2); Correspondingly, when the solenoid valve is energized, the moving iron core (302) slides relative to the stationary iron core (301) along the guide sleeve, so that the closing body (303) moves accordingly and controls the opening and closing of the valve seat (2).
2. The solenoid valve according to claim 1, wherein, The variable stiffness spring (5) includes at least two segments, and the elastic coefficients of each segment are not equal to each other.
3. The solenoid valve according to claim 2, characterized in that, The variable stiffness spring (5) includes a first segment with an elastic coefficient of K1 and a second segment with an elastic coefficient of K2, and K1≠K2.
4. The solenoid valve according to claim 2, characterized in that, The variable stiffness spring (5) is selected as a variable pitch spring or a variable mean diameter spring.
5. The solenoid valve according to claim 4, wherein, When the variable stiffness spring (5) includes two segments, one of the segments has a variable pitch or a variable mean diameter; When the variable stiffness spring (5) includes more than two segments, at least one segment is configured with a standard pitch and a standard mean diameter, and at least one segment has a variable pitch or a variable mean diameter.
6. The solenoid valve according to any one of claims 1-5, characterized in that, One end of the moving iron core (302) facing the stationary iron core (301) is provided with a concave hole. The end of the closing body (303) is inserted into the concave hole and connected to the moving iron core (302), and there is an annular gap between the concave hole and the closing body (303). Correspondingly, the variable stiffness spring (5) is inserted into the annular gap.
7. The solenoid valve according to claim 6, characterized in that, The closing body (303) includes a main shaft (304) and a sealing plate (305). The main shaft (304) has two ends. One end is inserted on the moving iron core (302), and the other end passes through the sliding hole and extends towards the valve seat (2). The end of the main shaft (304) is close to the sealing platform of the valve seat (2), and the sealing plate (305) is fixed on the end face of the sealing platform facing the valve seat (2).
8. The solenoid valve according to claim 7, wherein, The sealing plate (305) is made of rubber material.
9. The solenoid valve according to claim 7 or 8, characterized in that, The valve seat (2) is made of plastic material, and the valve seat (2) is injection molded and connected to the sleeve (4).
10. A control system, characterized in that, It includes the solenoid valve according to any one of claims 1-9.