Stable electromagnetic valve magnetic circuit assembly

Abstract

The utility model relates to the technical field of electromagnetic valves for water, and discloses a stable electromagnetic valve magnetic circuit assembly which comprises an electromagnetic coil structure, an upper fixed iron core and a movable iron core assembly. The movable iron core assembly comprises a movable iron core, a fixed chock plug, a movable colloidal particle and a reset spring. The movable iron core is movably mounted in the electromagnetic coil structure; a built-in cavity penetrating through the upper and lower ends of the movable iron core is formed in the movable iron core; the fixed chock plug is embedded and plugged on the opening at the upper end of the built-in cavity in a matched manner; the movable colloidal particle can be movably embedded into the built-in cavity and can move in the vertical direction of the built-in cavity; the reset spring is embedded in the built-in cavity, and the upper end and the lower end of the reset spring are connected with the fixed plug and the movable rubber particle correspondingly. According to the stable magnetic circuit assembly of the electromagnetic valve, the reset spring is completely packaged in the built-in cavity, the fixed chock plug is adopted for pressing the reset spring, friction loss caused by the fact that the reset spring is exposed is prevented, the influence of the external environment on the performance of the reset spring is avoided, and therefore the overall stability of the electromagnetic valve is improved, and the service life of the electromagnetic valve is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of water solenoid valve technology, and in particular to a stable solenoid valve magnetic circuit assembly. Background Technology

[0002] Currently, traditional solenoid valve circuit assemblies typically include key components such as an electromagnetic coil structure, an upper stationary iron core, and a moving iron core. In these components, the spring is often directly exposed and relies on the stationary iron core for pressure to achieve the reset function of the moving iron core. However, this design has many shortcomings, such as the spring being susceptible to performance degradation due to external environmental influences, and the potential frictional losses during the pressure process, which seriously affect the stability and service life of the solenoid valve.

[0003] For example, Chinese patent application number CN202311046811.0 discloses a magnetic circuit assembly structure for an electromagnetic valve, including an electromagnetic wire winding bracket, a magnetic guide frame, a magnet, an upper fixed iron core, a lower fixed iron core, a moving iron core assembly, a moving iron core spring, an electromagnetic coil structure, and a magnetic guide frame fixing plate; the magnet is placed inside the magnetic guide frame, and the magnetic guide frame, together with the matching magnetic guide frame fixing plate, the upper fixed iron core, and the lower fixed iron core, form a complete magnetic field circuit; the electromagnetic wire winding bracket has a through hole in the center for assembling the upper fixed iron core, the moving iron core assembly, and the lower iron core, and the electromagnetic coil structure is wound or assembled on the electromagnetic wire winding bracket; The moving iron core assembly is composed of a magnetic conductor and a soft sealing element. When the valve is switched on or off, the top surface of one end of the moving iron core assembly is attached to the upper or lower fixed iron core. The upper fixed iron core, the moving iron core assembly, and the lower fixed iron core are sequentially assembled in the central through hole of the electromagnetic wire winding bracket. The magnetic guide frame and the magnetic guide frame fixing piece are assembled together by pressing or stamping deformation to form a magnetic conductor. The lower fixed iron core has one or more flow guide ports or holes on its magnetic end face near the moving iron core assembly or on its side to allow the flow of the working medium inside the electromagnetic valve's magnetic assembly, reducing the resistance of the moving iron core assembly. (This is in conjunction with the appendix of this patent.) Figure 1 As shown, in the through hole at the center of the electromagnetic wire winding bracket, an upper fixed iron core, a moving iron core spring, a moving iron core assembly, and a lower iron core are assembled sequentially from top to bottom. A mounting groove is formed at the upper end of the moving iron core assembly, and the lower end of the moving iron core spring is embedded in the mounting groove. The upper end of the moving iron core spring extends out from the upper end of the moving iron core assembly and needs to be pressed against by the upper fixed iron core. However, the design of the moving iron core spring in this electromagnetic valve's magnetic circuit assembly structure is susceptible to performance degradation due to external environmental factors (such as the upper fixed iron core), as well as potential frictional losses during the pressing process with the upper fixed iron core. These issues severely affect the stability and service life of the electromagnetic valve. Utility Model Content

[0004] The purpose of this invention is to overcome the problems of the prior art and provide a stable electromagnetic valve magnetic circuit assembly.

[0005] To achieve the above objectives, the present invention adopts the following solution:

[0006] A stable electromagnetic valve magnetic circuit assembly includes an electromagnetic coil structure and an upper fixed iron core adapted and embedded on the upper end of the electromagnetic coil structure, and further includes a moving iron core assembly; the moving iron core assembly includes:

[0007] A moving iron core is movably installed within the electromagnetic coil structure; the moving iron core has an internal cavity extending through its upper and lower ends;

[0008] A fixed plug is fitted into the upper opening of the internal cavity;

[0009] Movable adhesive particles, which can be movably embedded in the built-in cavity and can move along the vertical direction of the built-in cavity;

[0010] A reset spring is fitted inside the built-in cavity, and its upper and lower ends are respectively connected to the fixed plug and the movable rubber pellet.

[0011] Furthermore, the fixed plug is cylindrical; the lower end face and the side face of the fixed plug are rounded; the movable rubber particle is cylindrical.

[0012] Furthermore, the diameter of the lower opening of the built-in cavity is smaller than the diameter of the movable rubber particle; the upper end face of the fixed plug is lower than or level with the upper end face of the moving iron core.

[0013] Furthermore, the stable solenoid valve magnetic circuit assembly also includes a valve seat and a lower iron core plug, wherein the upper end of the valve seat has a pressure relief hole protrusion; the pressure relief hole protrusion has a pressure relief channel communicating with the internal cavity;

[0014] The lower iron core plug is fitted onto the pressure relief hole protrusion and connected to the valve seat; the upper end of the lower iron core plug is fitted into the lower end of the electromagnetic coil structure; the lower iron core plug has an embedding cavity that communicates with the built-in cavity.

[0015] The upper end of the pressure relief hole protrusion is adapted to the position of the movable rubber particle, passes through the mounting cavity, extends into the internal cavity, and can be embedded in the lower opening of the internal cavity; the movable rubber particle can be pressed down on the top surface of the pressure relief hole protrusion to close the pressure relief channel.

[0016] Furthermore, the pressure relief hole protrusion is shaped like a frustum cylinder, and is narrower at the top and wider at the bottom from top to bottom.

[0017] Furthermore, the upper fixed iron core and the lower plug are each fitted with a first sealing ring between the upper and lower ends of the electromagnetic coil structure.

[0018] Furthermore, the valve seat is provided with a positioning groove that is adapted to be installed at the lower end of the lower iron core plug; the pressure relief hole protrusion is located in the positioning groove.

[0019] Furthermore, a second sealing ring is provided between the bottom of the positioning groove and the lower end face of the lower iron core plug; the bottom of the positioning groove has an installation groove for fitting and installing the second sealing ring.

[0020] Furthermore, the lower iron core plug is made of 430 stainless steel; the movable rubber granule is an elastic rubber granule, which is made of silicone, rubber or soft plastic.

[0021] Furthermore, the stable electromagnetic valve magnetic circuit assembly also includes a housing, a magnetic guide frame, and a magnet; the magnetic guide frame is fitted on the outer wall of the electromagnetic coil structure; the magnet is mounted on the magnetic guide frame; the housing covers the electromagnetic coil structure, the fixed iron core, the moving iron core assembly, the lower iron core plug, the magnetic guide frame, and the magnet, and connects to the valve seat.

[0022] Compared with existing technologies, this utility model has the following advantages:

[0023] 1. Based on the electromagnetic coil structure and the upper fixed iron core, this utility model improves the moving iron core assembly. By combining the moving iron core, the fixed plug, the movable rubber pellet, and the return spring, a moving iron core assembly is formed. The moving iron core has an internal cavity, and the movable rubber pellet, the return spring, and the fixed plug are installed in the internal cavity from bottom to top. The return spring is completely encapsulated in the internal cavity, and the fixed plug is used to press the return spring to prevent frictional loss caused by the exposed return spring. This avoids the influence of the external environment on its performance, thereby improving the overall stability and service life of the solenoid valve.

[0024] 2. The moving iron core assembly formed by combining the moving iron core, fixed plug, movable rubber pellet and return spring can move back and forth in the vertical direction relative to the electromagnetic coil structure under the action of the magnetic field of the electromagnetic coil structure. The electromagnetic valve magnetic circuit assembly exposed relative to the return spring reduces the space restriction between the structures, making the structural design more flexible and the size more miniaturized. Attached Figure Description

[0025] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 This is a schematic diagram of the structure of the stable electromagnetic valve magnetic circuit assembly of this utility model.

[0027] Figure 2 This is a partial structural schematic diagram of the stable electromagnetic valve magnetic circuit assembly of this utility model.

[0028] Figure 3 This is a structural schematic diagram of the moving iron core assembly of this utility model.

[0029] The image includes:

[0030] Valve seat 1, pressure relief hole protrusion 11, pressure relief channel 12, positioning groove 13, mounting groove 14, electromagnetic coil structure 2, upper fixed iron core 3, moving iron core assembly 4, moving iron core 41, internal cavity 411, fixed plug 42, movable rubber pellet 43, return spring 44, lower iron core plug head 5, embedded cavity 51, first sealing ring 6, second sealing ring 7, outer shell 8, magnetic guide frame 9, magnet 10. Detailed Implementation

[0031] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0032] like Figures 1 to 3As shown, a stable electromagnetic valve magnetic circuit assembly includes an electromagnetic coil structure 2 and an upper fixed iron core 3 adapted and embedded in the upper end of the electromagnetic coil structure 2. It also includes a valve seat 1, a moving iron core assembly 4, a lower iron core plug 5, a housing 8, a magnetic guide frame 9, and a magnet 10. The moving iron core assembly 4 includes a moving iron core 41, a fixed plug 42, a movable rubber granule 43, and a return spring 44. The moving iron core 41 is movably installed within the electromagnetic coil structure 2. As a core component, the moving iron core 41 is responsible for moving under the action of electromagnetic force, thereby controlling the opening and closing of the valve. The electromagnetic coil structure 2 consists of a coil frame and a coil wound on the coil frame. The moving iron core 41 has an internal cavity 411 extending through its upper and lower ends. The design of the internal cavity 411 provides installation space for other components and also provides necessary guidance for the movement of the moving iron core 41. The fixed plug 42 is adapted and embedded in the upper opening of the internal cavity 411. The fixed plug 42 not only provides a seal but also serves as a connection point for one end of the return spring 44, such as a contact connection or a fixed connection, ensuring the stable installation of the return spring 44. The movable rubber granule 43 can be movably embedded in the built-in cavity 411 and can move along the vertical direction of the built-in cavity 411; the purpose of the movable rubber granule 43 is to better control the return spring 44. The return spring 44 is embedded in the built-in cavity 411, and its upper and lower ends are respectively connected to the fixed plug 42 and the movable rubber granule 43. The valve seat 1 can realize the fixed installation of structures such as the moving iron core assembly 4, the lower iron core plug 5, the outer shell 8, the magnetic guide frame 9, and the magnet 10. The upper end of the valve seat 1 has a pressure relief hole protrusion 11; the pressure relief hole protrusion 11 has a pressure relief channel 12 communicating with the built-in cavity 411; the lower iron core plug head 5 is adapted to be installed on the pressure relief hole protrusion 11 and connected to the valve seat 1; the upper end of the lower iron core plug head 5 is adapted to be embedded in the lower end of the electromagnetic coil structure 2 and can be contacted and connected with the moving iron core assembly 4; the lower iron core plug head 5 has an embedding cavity 51 communicating with the built-in cavity 411; the upper end of the pressure relief hole protrusion 11 is adapted to be positioned corresponding to the position of the movable rubber particle 43, passes through the embedding cavity 51, extends into the built-in cavity 411, and can be embedded in the lower opening of the built-in cavity 411. This design and installation of the pressure relief hole protrusion 11 prevents fluid from leaking from the connection between the embedding cavity 51 and the valve seat 1. The movable granule 43 can be pressed down on the top surface of the pressure relief hole protrusion 11 to close the pressure relief hole 12.By setting a pressure relief hole protrusion 11 on the valve seat 1, which cooperates with the lower iron core plug head 5, and is matched and installed on the lower end of the electromagnetic coil structure 2, the mounting cavity 51 of the lower iron core plug head 5 is connected to the internal cavity 411 and provides guidance and limiting functions for the installation of the pressure relief hole protrusion 11. When it is necessary to close the pressure relief channel 12, the electromagnetic coil structure 2 generates a magnetic field by energizing it, which controls the displacement of the moving iron core assembly 4. The movable rubber particles 43 are attracted and pressed down on the top of the pressure relief hole protrusion 11 under the action of the magnetic field of the electromagnetic coil structure 2, thereby closing the pressure relief channel 12. The movable rubber particles 43 are tightly attached to the top of the pressure relief hole protrusion 11, completely sealing the pressure relief channel 12 and forming a good sealing state. A magnetic guide frame 9 is fitted on the outer wall of the electromagnetic coil structure 2; the magnet 10 is mounted on the magnetic guide frame 9; the outer shell 8 covers the electromagnetic coil structure 2, the fixed iron core, the moving iron core assembly 4, the lower iron core plug head 5, the magnetic guide frame 9, and the magnet 10 and connects to the valve seat 1.

[0033] This stable solenoid valve magnetic circuit assembly is based on the electromagnetic coil structure 2, the upper fixed iron core 3, etc., and improves the moving iron core assembly 4. By combining the moving iron core 41, the fixed plug 42, the movable rubber particle 43 and the return spring 44, the moving iron core assembly 4 is formed. The moving iron core 41 has an internal cavity 411, and the movable rubber particle 43, the return spring 44 and the fixed plug 42 are installed in the internal cavity 411 from bottom to top. The return spring 44 is completely encapsulated in the internal cavity 411. The fixed plug 42 is used to press the return spring 44 to prevent friction loss caused by the exposed return spring 44, avoid the influence of the external environment on its performance, and thus improve the overall stability and service life of the solenoid valve.

[0034] Preferably, the fixed plug 42 is cylindrical, with a simple structure and convenient design and installation. Its purpose is to completely encapsulate the return spring 44 within the internal cavity 411. The fixed plug 42 presses against the return spring 44, preventing frictional loss caused by the exposed return spring 44 and avoiding the influence of the external environment on its performance, thereby improving the overall stability and service life of the solenoid valve. Of course, the shape of the fixed plug 42 can be reasonably set according to requirements, and other shapes can also be used, such as square prisms, triangular prisms, etc. Similarly, the movable rubber particle 43 is also cylindrical, or can be other shapes, as long as it can provide a good sealing and closing effect on the pressure relief channel 12. In addition, the lower end face and side face of the fixed plug 42 are rounded. The rounded corner design eliminates sharp edges at right angles, avoiding problems such as cracks or deformation at the end of the plug or return spring 44 due to local stress concentration during spring compression. Moreover, the rounded corner design allows for a more uniform pressure distribution between the fixed plug 42 and the return spring 44, preventing local deformation or loosening at the spring end due to uneven force.

[0035] To prevent the movable rubber particle 43 from sliding out of the lower opening of the internal cavity 411, the diameter of the lower opening of the internal cavity 411 is smaller than the diameter of the movable rubber particle 43. This design of the size relationship between the lower opening of the internal cavity 411 and the movable rubber particle 43 can effectively prevent the movable rubber particle 43 from sliding out of the lower opening of the internal cavity 411.

[0036] The upper end face of the fixed plug 42 is lower than or level with the upper end face of the moving iron core 41. When the upper end face of the fixed plug 42 is at the same height as or lower than the upper end face of the moving iron core 41, the two structures are more tightly connected and the connection is more stable and reliable when the upper end face of the moving iron core 41 moves to the upper fixed iron core 3.

[0037] The pressure relief hole protrusion 11 is shaped like a frustum, narrower at the top and wider at the bottom. This frustum shape, similar to a triangular support, provides better structural stability and better matches the movable rubber granule 43, enabling the opening and sealing of the pressure relief channel 12. This also results in a better sealing effect when the movable rubber granule 43 presses down on the pressure relief channel 12.

[0038] To enhance the connection and sealing of the structure, a first sealing ring 6 is fitted between the upper fixed iron core 3 and the lower plug and the upper and lower ends of the electromagnetic coil structure 2, respectively.

[0039] To enhance the connection stability of the structure, the valve seat 1 is provided with a positioning groove 13 that is adapted to be installed on the lower end of the lower iron core plug head 5; the pressure relief hole protrusion 11 is located in the positioning groove 13. A second sealing ring 7 is provided between the bottom of the positioning groove 13 and the lower end face of the lower iron core plug head 5 to enhance the sealing between the lower iron core plug head 5 and the valve seat 1; the bottom of the positioning groove 13 has an installation groove 14 for the second sealing ring 7 to be installed. The design of the positioning groove 13 and the installation groove 14 are both to enhance the stability of the installation connection of the lower iron core plug head 5 and the second sealing ring 7, making the structural connection more stable and reliable.

[0040] In this embodiment, the lower iron core plug head 5 is preferably made of 430 stainless steel, which has good strength, corrosion resistance, and good plasticity and weldability, making it easy to process and maintain, and more suitable for mass production. The movable rubber granule 43 is an elastic rubber granule, which is made of silicone, rubber, or soft plastic. Soft plastic is a currently conventional structure, made of polyethylene or polypropylene. This design allows for better sealing and closure of the pressure relief channel 12.

[0041] The working principle of this utility model is as follows:

[0042] This stable solenoid valve magnetic circuit assembly is mainly used in water solenoid valves. When the stable solenoid valve magnetic circuit assembly is in the closed state, the moving iron core assembly 4 is magnetically attracted to the lower iron core plug head 5 under the action of the electromagnetic coil structure 2. The moving iron core 41 and the lower iron core plug head 5 are magnetically connected. At this time, the movable rubber particle 43 is attracted and pressed down on the top of the pressure relief hole protrusion 11 under the action of the magnetic field of the electromagnetic coil structure 2. At the same time, the return spring 44 elastically pushes the movable rubber particle 43 to press and close the pressure relief hole 12. The return spring 44 and the movable rubber particle 43 elastically press against the top of the pressure relief hole protrusion 11, thereby achieving the effect of closing the valve and thus the function of shutting off the water.

[0043] When the solenoid valve magnetic circuit assembly is in a stable open state, the moving iron core assembly 4 moves upward under the energization of the electromagnetic coil structure 2, magnetically attracting the upper fixed iron core 3 and making magnetic contact with it. At this time, the movable rubber particle 43 moves upward with the moving iron core assembly 4, moving away from the top of the pressure relief hole protrusion 11. The reset spring 44 elastically resets, opening the pressure relief hole 12, thereby achieving the effect of opening the valve and thus achieving the function of boiling water.

[0044] In summary, this utility model embodiment provides a stable electromagnetic valve magnetic circuit assembly. Based on the electromagnetic coil structure 2 and the upper fixed iron core 3, the stable electromagnetic valve magnetic circuit assembly improves the moving iron core assembly 4. The moving iron core assembly 4 is formed by combining the moving iron core 41, the fixed plug 42, the movable rubber pellet 43, and the return spring 44. The moving iron core 41 has an internal cavity 411, and the movable rubber pellet 43, the return spring 44, and the fixed plug 42 are installed sequentially from bottom to top within the internal cavity 411, completely encapsulating the return spring 44 within the internal cavity 411. The fixed plug 42 presses the return spring 44, preventing frictional loss due to the exposed return spring 44 and avoiding the influence of the external environment on its performance, thereby improving the overall stability and service life of the electromagnetic valve.

[0045] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this application, and these improvements and substitutions should also be considered within the scope of protection of this application.

Claims

1. A stable solenoid magnetic circuit assembly comprising a solenoid structure and a top plunger core fitted on the upper end of said solenoid structure, characterized in that, Also comprising a moving iron core assembly; the moving iron core assembly comprises: a moving iron core, which is movably installed in the electromagnetic coil structure; the moving iron core has a built-in cavity penetrating through the upper and lower ends thereof; a fixed plug head, which is fitted and plugged in the upper end opening of the built-in cavity; a movable rubber particle, which is movably embedded in the built-in cavity and can move along the upper and lower directions of the built-in cavity; a return spring, which is embedded in the built-in cavity and the upper and lower ends thereof are connected with the fixed plug head and the movable rubber particle respectively.

2. The stable solenoid magnetic circuit assembly of claim 1, wherein, The fixed plug head is in the shape of a cylinder; the lower end surface of the fixed plug head is rounded between the lower end surface and the side surface; the movable rubber particle is in the shape of a cylinder.

3. The stable solenoid magnetic circuit assembly of claim 2, wherein, The caliber of the lower end opening of the built-in cavity is smaller than the diameter of the movable rubber particle; the upper end surface of the fixed plug head is lower than or level with the upper end surface of the moving iron core.

4. The stable solenoid magnetic circuit assembly according to claim 1 or 2, characterized by Also comprising a valve seat and a lower iron core plug sleeve head; the upper end of the valve seat has a pressure relief hole protrusion; the pressure relief hole protrusion has a pressure relief hole channel which is communicated with the built-in cavity; The lower iron core plug sleeve head is fitted and sleeved on the pressure relief hole protrusion and connected with the valve seat; the upper end of the lower iron core plug sleeve head is fitted and sleeved in the lower end of the electromagnetic coil structure; the lower iron core plug sleeve head has an embedded cavity which is communicated with the built-in cavity; The upper end of the pressure relief hole protrusion corresponds to the position of the movable rubber particle, is fitted and passes through the embedded cavity and extends into the built-in cavity, and can be embedded in the lower end opening of the built-in cavity; the movable rubber particle can be pressed down on the top end surface of the pressure relief hole protrusion to close the pressure relief hole channel.

5. The stable solenoid magnetic circuit assembly of claim 4, wherein, The pressure relief hole protrusion is in the shape of a circular truncated cylinder and is arranged in a narrow upper and wide lower manner from top to bottom.

6. The stable solenoid magnetic circuit assembly of claim 5, wherein, The upper fixed iron core and the lower plug head are respectively sleeved with a first sealing ring between the upper and lower ends of the electromagnetic coil structure.

7. The stable solenoid magnetic circuit assembly of claim 6, wherein, The valve seat is provided with a positioning groove which is fitted and installed with the lower end of the lower iron core plug sleeve head; the pressure relief hole protrusion is located in the positioning groove.

8. The stable solenoid magnetic circuit assembly of claim 7, wherein, A second sealing ring is arranged between the groove bottom of the positioning groove and the lower end surface of the lower iron core plug sleeve head; the groove bottom of the positioning groove has an installation groove for fitting and installing the second sealing ring.

9. The stable solenoid magnetic circuit assembly of claim 4, wherein, The lower iron core plug sleeve head is made of 430 stainless steel; the movable rubber particle is an elastic rubber particle, which is silica gel, rubber or soft plastic.

10. The stable solenoid magnetic circuit assembly of claim 5, wherein, Also comprising a shell, a magnetic guide frame and a magnet; the outer wall of the electromagnetic coil structure is sleeved with a magnetic guide frame; the magnet is installed on the magnetic guide frame; the shell covers the electromagnetic coil structure, the fixed iron core, the moving iron core assembly, the lower iron core plug sleeve head, the magnetic guide frame and the magnet and is connected with the valve seat.

Images