Solenoid valve
The solenoid valve design addresses uneven frictional contact by using a guide ring with elastic deformation for uniform engagement with the sleeve, improving service life and reducing frictional contact with the movable core.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
- Filing Date
- 2024-07-25
- Publication Date
- 2026-07-01
AI Technical Summary
Existing solenoid valves experience uneven frictional contact between the guide ring and sleeve, leading to reduced service life and increased frictional contact between the movable core and sleeve.
The solenoid valve design includes a guide ring with an outer diameter larger than its base portion, featuring a first gap between the inner edge and the groove side wall, allowing elastic deformation under media pressure for uniform frictional contact with the sleeve, reducing frictional contact with the movable core.
Ensures uniform frictional contact between the guide ring and sleeve, enhancing the solenoid valve's service life and minimizing frictional contact with the movable core.
Smart Images
Figure 2026521774000001_ABST
Abstract
Description
Technical Field
[0001] This application claims the priority of a Chinese patent application filed with the China National Intellectual Property Administration on July 31, 2023, with an application number of 202310953105.8 and an invention title of "Solenoid Valve", and all of its contents are incorporated into this application by reference.
[0002] This application relates to the technical field of electric control, particularly to solenoid valves.
Background Art
[0003] As an electric control device, the solenoid valve is widely applied to pneumatic spinning machines and includes a fixed core, a movable core unit, a sleeve, and a valve body. The valve body is provided with a first valve port. The movable core unit includes a movable core, a valve plug, and a guide ring. The valve plug is provided with a second valve port. The valve plug can be close to or away from the first valve port. The movable core can be close to or away from the second valve port. At the moment when the second valve port is opened, the medium pressure accumulated between the cores of the movable core can be rapidly released to the outside through the through hole of the movable core. During the operation process of the valve, repeated frictional contact occurs between the guide ring and the sleeve. For those skilled in the art, it is necessary to realize the uniformity during the frictional contact between the guide ring and the sleeve as much as possible, relatively improve the service life of the solenoid valve, and reduce the possibility of frictional contact between the movable core and the sleeve.
Summary of the Invention
Problems to be Solved by the Invention
[0004] An object of the present invention is to provide a solenoid valve that can relatively ensure the uniformity during the frictional contact between the guide ring and the sleeve, relatively improve the service life of the solenoid valve, and reduce the possibility of frictional contact between the movable core and the sleeve.
Means for Solving the Problems
[0005] Embodiments of the present invention provide a solenoid valve comprising a valve body, a core unit, and a sleeve, wherein the valve body is provided with an inlet passage, the core unit comprises a movable core and a guide ring, the movable core comprises a base portion, the base portion is provided with a groove portion, the groove portion is recessed inward from the surface of the base portion, the guide ring is position-restricted to the groove portion, the guide ring is elastically deformable, the guide ring comprises an inner edge portion and an outer edge portion, the outer diameter of the outer edge portion is larger than the outer diameter of the base portion, the outer edge portion can abut and slide-engage with the sleeve, a first gap is provided between the inner edge portion and the side wall of the groove portion, and the first gap communicates with the inlet passage.
[0006] With the above design, the outer diameter of the outer edge of the guide ring is larger than the outer diameter of the base, and a first gap is provided between the inner edge and the side wall of the groove. This first gap communicates with the inlet passage, and the media pressure of the inlet passage can act on the inner edge of the guide ring. As a result, the guide ring undergoes elastic deformation, maintaining contact and sliding engagement between the outer edge of the guide ring and the sleeve in the circumferential direction. This relatively ensures uniformity of frictional contact between the guide ring and the sleeve during the valve's operation, relatively improves the service life of the solenoid valve, and reduces the possibility of frictional contact occurring between the movable core and the sleeve. [Brief explanation of the drawing]
[0007] [Figure 1] This is a schematic cross-sectional view of the overall configuration of an embodiment of the solenoid valve provided by the present invention. [Figure 2] Figure 1 is a schematic cross-sectional view of the overall configuration of the movable core of the solenoid valve core unit. [Figure 3] Figure 1 is a schematic cross-sectional view of the overall configuration of the core unit of the solenoid valve. [Figure 4] Figure 1 is a schematic cross-sectional view of the overall configuration of the valve plug of the solenoid valve. [Figure 5] Figure 1 is a schematic diagram of the three-dimensional structure of the guide ring of the solenoid valve. [Modes for carrying out the invention]
[0008] To help those skilled in the art better understand the technical proposal provided in this application, the technical proposal will be further described below in conjunction with the drawings and specific embodiments. This application focuses on optimizing and improving the engagement between the movable core and the guide ring of a solenoid valve. By making the outer diameter of the guide ring larger than the outer diameter of the base portion, a first gap is provided between the inner edge of the guide ring and the side wall of the groove portion. This first gap communicates with the inlet passage, and the media pressure of the inlet passage can act on the inner edge of the guide ring. As a result, the guide ring undergoes elastic deformation, and the outer edge of the guide ring maintains contact with the sleeve. This relatively ensures uniformity of frictional contact between the guide ring and the sleeve during valve operation, relatively improves the service life of the solenoid valve, and reduces the possibility of frictional contact occurring between the movable core and the sleeve. Other components, such as the fixed core, valve plug, valve body, etc., can be adaptively improved according to the operating environment or design.
[0009] Referring to Figures 1-3, a specific embodiment of the solenoid valve provided in this application is shown, the solenoid valve includes a valve body 10, a screw 20, a sleeve 30, a fixed core 40, and a core unit 50, the valve body 10 includes a first valve port 10a, the valve body 10 is provided with an inlet passage 11, a transition passage 14, and an outlet passage 12, the medium pressure in the inlet passage 11 is greater than the medium pressure in the outlet passage 12, the outlet passage 12 is in communication with the atmosphere, the valve plug 52 can be in contact with the first valve port 10a or away from the first valve port 10a, the air medium enters from the inlet passage 11, passes through the first valve port 10a and the transition passage 14 and is discharged from the outlet passage 12, the valve body 10 further A male threaded portion 13 is provided, and a female threaded portion 21 is provided on the screw 20 that screw-engages with the male threaded portion 13. The sleeve 30 includes a main body portion 31 and a burring portion 32 that extends outward from the circumferential direction of the main body portion 31. One end of the main body portion 31 is fixedly connected to the fixing core 40. The screw 20 includes a pressing portion 22. The burring portion 32 is sealed and engaged with the valve body 10 by screw tightening engagement between the female threaded portion 21 and the male threaded portion 13. The sealing component 70 is positioned within the mounting groove of the valve body 10. One side of the burring portion 32 abuts against the sealing component 70, and the other side of the burring portion 32 that is away from the sealing component 70 abuts against the pressing portion 22 to prevent air medium from leaking from that area.
[0010] The core unit 50 includes a movable core 51, a valve plug 52, and a gasket 53, the movable core 51 and the valve plug 52 are connected to restrict their position, the elastic component 60 is located between the fixed core 40 and the movable core 51, one end of the elastic component 60 abuts against the fixed core 40 and the other end of the elastic component 60 abuts against the movable core 51, the movable core 51 includes a base portion 511 and a connecting portion 512, the base portion 511 and the connecting portion 512 can be an integral structure, the base portion 511 extends upward along the axial direction from the connecting portion 512 and the base portion 511 is provided with through-holes 5111 that penetrate the upper and lower surfaces of the base portion, the through-holes 5111 include vertical holes and inclined holes, the movable core 51 extends axially from the lower surface of the base portion 511 The valve plug 52 further includes a sealing portion 513 that protrudes downward along the direction, the valve plug 52 is provided with a second valve opening portion 52a, the valve plug 52 is provided with a second passage 521 that penetrates the upper and lower surfaces of the valve plug, the sealing portion 513 can abut against or away from the second valve opening portion 52a, the valve plug 52 is further provided with a stepped portion 522, the connecting portion 512 is provided with a position limiting portion 5121 and a support portion 5122, the position limiting portion 5121 can abut against or away from the stepped portion 522, the gasket 53 is located on the outer circumference of the base portion 511 and is supported by the support portion 5122, and a coil member is fitted onto the outer circumference of the sleeve 30.
[0011] The core unit 50 further includes a guide ring 54, and the base portion 511 of the movable core 51 is provided with a groove portion 5112, the number of groove portions can be at least one or more, in this embodiment there are two groove portions, the groove portion 5112 is recessed inward from the base outer surface 5113 of the base portion 511, the guide ring 54 is positioned within the groove portion 5112, and the groove portion 5112 is The guide ring 54 includes a side wall 51121, a top wall 51122, and a bottom wall 51123. The outer diameter of the guide ring is defined as D1, and the outer diameter of the base portion 511 is defined as D2, where D1 > D2. Referring to Figure 5, which combines Figures 1 to 4, the guide ring 54 includes an outer edge portion 542 and an inner edge portion 543. A first gap S1 is provided between the inner edge portion 542 and the side wall 51121 of the groove portion 5112. By providing the first gap S1, air After entering through the inlet passage 11, the first gap S1 can press against the inner edge 543 of the guide ring 54, causing elastic deformation of the guide ring 54, which allows the outer edge 542 to contact and slide-engage with the inner wall of the main body 31 of the sleeve 30. This reduces the situation where the guide ring and sleeve repeatedly make one-sided frictional contact due to radial displacement of the movable core or sleeve during the valve's operation, relatively ensuring uniformity of frictional contact between the guide ring and sleeve during the valve's operation, and relatively improving the service life of the solenoid valve. Furthermore, the outer diameter D1 of the guide ring is larger than the outer diameter D2 of the base, so the guide ring and sleeve are always frictionally engaged during operation, reducing the possibility of frictional contact occurring between the movable core and sleeve. <S1≦0.1mmである。
[0012] The guide ring 54 is further provided with a notch 541, and the notch 541 is provided with a notched passage, which penetrates the upper and lower surfaces of the guide ring, and one side of the notched passage along the axial direction is in communication with the inlet passage 11, and the other side along the axial direction is in communication with the cavity between the fixed core 40 and the movable core 51, so that after entering from the inlet passage 11, air rapidly enters the cavity between the fixed core and the movable core through the notch 541 and then enters the through-hole passage 5111, and can act on the valve plug 52, causing the valve plug 52 to maintain contact with the first valve opening 10a, which is advantageous for closing the valve.
[0013] A second gap S2 (0.2 mm ≤ S2 ≤ 0.3 mm) is defined as being between the outer surface 5113 of the base portion 511 and the inner wall of the main body portion 31. If S2 is too small, it is likely to cause wear between the movable core 51 and the sleeve. If S2 is too large, it will affect the excitation action between the movable core 51 and the fixed core 40. To achieve better wear resistance and improve the valve life, the material hardness of the guide ring 54 can be lower than that of the sleeve. For example, the guide ring 54 can be manufactured from POM, PEEK, or PPS material.
[0014] The following describes the operating principle of the solenoid valve. When the coil member is energized, the excitation action of the coil member causes the movable core 51 to move upward in the axial direction toward the fixed core 40, the elastic component 60 is compressed, and as the sealing portion 5112 moves away from the second valve port 52a, the gas pressure accumulated in the through-hole passage 5111 and the gas pressure located above the through-hole passage 5111 are rapidly discharged to the outside through the valve plug passage 521, and the movable core 51 moves toward the position limiting portion The 5121 continues to move upward until it contacts the stepped portion 522, and the movable core 51 acts upward together with the valve plug 52, the valve plug 52 moves away from the first valve port 10a, the first valve port 10a is opened, and the solenoid valve is in the fully open position, in which case the position limiting portion 5121 contacts the stepped portion 522, and the gasket 53 contacts the burring portion 32, there is a gap between the guide ring 54 and the top wall 51122 of the groove, and the guide ring 54 is against the bottom wall 5 of the groove When in contact with 1123 and the coil member is in a de-energized state, due to the decrease in excitation of the coil member and the restoring force of the elastic component 60, the valve plug 52 comes into contact with the first valve opening 10a and the sealing portion 513 comes into contact with the second valve opening 52a. In this case, the position limiting portion 5121 moves away from the stepped portion 522 and the gasket 53 moves away from the burring portion 32. In this case, the air medium in the inlet passage 11 passes through the notch 541, the cavity between the fixed core and the movable core, and the through-hole passage 5111. A force is applied to the valve plug 52 via the media, causing the valve plug 52 to remain in contact with the first valve opening 10a. Due to the media pressure, the guide ring 54 contacts the top wall 51122 of the groove, and there is a gap between the guide ring 54 and the bottom wall 51123 of the groove. That is, a gap is provided between the axial direction of the guide ring 54 and the top or bottom wall of the groove, which facilitates positional limiting connection between the guide ring 54 and the groove.
[0015] The solenoid valve provided in the embodiment of this application includes a valve body, a core unit, and a sleeve, wherein the valve body is provided with an inlet passage, the core unit includes a movable core and a guide ring, the movable core includes a base portion, the base portion is provided with a groove portion, the groove portion is recessed inward from the surface of the base portion, the guide ring is positioned within the groove portion, and the outer diameter of the guide ring is larger than the outer diameter of the base portion. The guide ring includes an inner edge and an outer edge, with a first gap provided between the inner edge and the side wall of the groove, the first gap communicating with the entrance passage, the guide ring being elastically deformable, and the outer edge contacting and slidingly engaging with the sleeve.
[0016] With the above design, the outer diameter of the guide ring is larger than the outer diameter of the base, and a first gap is provided between the inner edge and the side wall of the groove. This first gap communicates with the inlet passage, and the media pressure in the inlet passage can act on the inner edge of the guide ring. As a result, the guide ring undergoes elastic deformation, and the outer edge of the guide ring maintains contact with the sleeve for sliding engagement. This relatively ensures uniformity of frictional contact between the guide ring and the sleeve during the valve's operation, relatively improves the service life of the solenoid valve, and reduces the possibility of frictional contact occurring between the movable core and the sleeve.
[0017] Furthermore, directional nouns such as "inside" and "outside," or ordinal numbers such as "first" and "second," mentioned herein are all based on the drawings in the specification and introduced for the convenience of explanation, and do not imply any limitation on the order of any components. The above describes in detail the throttle valve provided by the relevant technical proposal, and while this specification explains it with specific embodiments, the above description of embodiments is merely for the purpose of understanding the method and core concept of the embodiments of this application and does not impose any limitations on the embodiments of this application in any way. [Explanation of Symbols]
[0018] 10... Valve body; 10a ···First valve opening; 11 ··· Inlet passage; 12 ··· Outlet passage; 13 ··· Male thread portion; 14 ··· Transition hole path; 20 ··· Screw; 21 ··· Female thread portion; 22 ··· Pressing portion; 30 ··· Sleeve; 31 ··· Body portion; 32 ··· Burring portion; 40 ··· Fixed core; 50 ··· Core unit; 51 ··· Movable core; 511 ··· Base portion; 5111 ··· Through hole path; 5112 ··· Groove portion; 5113 ··· Base outer peripheral surface; 51121 ··· Side wall; 51122 ··· Top wall; 51123 ··· Bottom wall; 512 ··· Connection portion; [[ID=
Claims
1. A solenoid valve comprising a valve body, a core unit, and a sleeve, wherein the valve body is provided with an inlet passage, the core unit comprises a movable core and a guide ring, the movable core comprises a base portion, the base portion is provided with a groove portion, the groove portion is recessed inward from the surface of the base portion, the guide ring is position-restricted to the groove portion, the guide ring is elastically deformable, the guide ring comprises an inner edge portion and an outer edge portion, the outer diameter of the outer edge portion is larger than the outer diameter of the base portion, the outer edge portion can abut and slide-engage with the sleeve, a first gap is provided between the inner edge portion and the side wall of the groove portion, and the first gap communicates with the inlet passage. A solenoid valve characterized by the following features.
2. The solenoid valve includes a fixed core, and the guide ring is provided with a notch, the notch forming a notched passage, the notched passage having one side along the axial direction communicating with the inlet passage, and the other side along the axial direction communicating with the cavity between the fixed core and the movable core. The solenoid valve according to feature 1.
3. The aforementioned first gap is defined as S1 (0 < S1 ≤ 0.1 mm). The solenoid valve according to feature 1.
4. The base portion is defined as including the outer surface of the base, and a second gap S2 (0.2 mm ≤ S2 ≤ 0.3 mm) is provided between the outer surface of the base and the sleeve. The solenoid valve according to feature 1.
5. The material hardness of the guide ring is lower than the material hardness of the sleeve. A solenoid valve according to any one of features 1 to 4.
6. The guide ring is manufactured from POM material, PEEK material, or PPS material. The solenoid valve according to feature 5.
7. The groove portion includes a top wall and a bottom wall, the core unit includes a valve plug, the valve plug is connected to the movable core so as to be restricted in position, the valve body is provided with a first valve port, the valve plug is provided with a second valve port, when the solenoid valve is closed, the sealing portion of the movable core abuts against the second valve port, the valve plug abuts against the first valve port, the guide ring has a gap with the bottom wall, and the guide ring abuts against the top wall. A solenoid valve according to any one of features 1 to 4.
8. The groove includes a top wall and a bottom wall, the core unit includes a valve plug, the valve plug is connected to the movable core so as to be restricted in position, the valve body is provided with a first valve opening, the valve plug is provided with a second valve opening, when the solenoid valve is open, the sealed portion of the movable core is separated from the second valve opening, the valve plug is separated from the first valve opening, the guide ring is gaped from the top wall, and the guide ring abuts against the bottom wall. A solenoid valve according to any one of features 1 to 4.