Electromagnetic valve

Abstract

The electromagnetic valve comprises a valve body, a core assembly and a sleeve, the valve body is provided with an inlet channel, the core assembly comprises a movable iron core and a guide ring, the movable iron core comprises a base body part, the base body part is provided with a groove part, the groove part is recessed inwards from the surface of the base body part, the guide ring is limited in the groove part, and the outer diameter of the guide ring is larger than that of the base body part; the guide ring is in sliding fit with the sleeve; the guide ring comprises an inner edge part and an outer edge part, a first gap is formed between the inner edge part and the side wall of the groove part and communicates with the inlet channel, the guide ring can elastically deform, and the outer edge part abuts against the sleeve. Medium pressure in the inlet channel can act on the inner edge portion of the guide ring so that the guide ring can abut against the sleeve, and therefore the uniformity of frictional contact between the guide ring and the sleeve is relatively guaranteed.

Description

[Technical field]

[0001] The invention relates to the technical field of electric control, and in particular to a solenoid valve. [Background technology]

[0002] As an electric control device, the solenoid valve is often used in pneumatic textile machines. It includes a static iron core, a moving core assembly, a sleeve and a valve body. The valve body is provided with a first valve port portion. The moving core assembly includes a moving core, a valve plug and a guide ring. The valve plug is provided with a second valve port portion. The valve plug can approach or move away from the first valve port portion, and the moving core can approach or move away from the second valve port portion. When the second valve port portion is opened, the medium pressure accumulated between the moving core iron core can be quickly released outward through the through hole of the moving core. During the valve actuation process, repeated frictional contact occurs between the guide ring and the sleeve. For technical personnel in this field, it is necessary to achieve the uniformity of the frictional contact between the guide ring and the sleeve as much as possible, so as to relatively improve the service life of the solenoid valve and reduce the possibility of frictional contact between the moving iron core and the sleeve. [Summary of the invention]

[0003] The object of the present invention is to provide a solenoid valve which can relatively guarantee the uniformity of 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 moving iron core and the sleeve.

[0004] An embodiment of the present invention provides a solenoid valve, including a valve body, a core assembly and a sleeve, the valve body is provided with an inlet channel, the core assembly includes a moving iron core and a guide ring, the moving iron 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 limited to the groove portion, the guide ring can undergo elastic deformation, the guide ring includes 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 be abutted against and slidably fitted with the sleeve, a first gap is provided between the inner edge portion and the side wall of the groove portion, the first gap is connected to the inlet channel.

[0005] Through 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, and the first gap is connected to the inlet channel. The medium pressure of the inlet channel can act on the inner edge of the guide ring, and the guide ring undergoes elastic deformation so that the outer edge of the guide ring maintains contact and sliding fit with the sleeve in the circumferential direction, which can relatively ensure the uniformity of the friction contact between the guide ring and the sleeve during the valve actuation process, relatively improve the service life of the solenoid valve, and reduce the possibility of friction contact between the moving iron core and the sleeve.

Brief Description of the Drawings

[0006] Figure 1 A schematic cross-sectional view of the overall structure of an embodiment of the solenoid valve provided by the present invention;

[0007] Figure 2 for Figure 1 A schematic cross-sectional view of the overall structure of a moving iron core of a core assembly of an electromagnetic valve;

[0008] Figure 3 for Figure 1 A schematic cross-sectional view of the overall structure of a core assembly of a solenoid valve;

[0009] Figure 4 for Figure 1 A schematic cross-sectional view of the overall structure of the valve plug of the solenoid valve;

[0010] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the guide ring of the solenoid valve

[0011] Description of Reference Numerals

[0012] Valve body 10, first valve port 10a, inlet channel 11, outlet channel 12, external threaded portion 13, transition channel 14, threaded member 20, internal threaded portion 21, pressing portion 22, sleeve 30, body portion 31, flange portion 32, static iron core 40, core assembly 50, moving iron core 51, base portion 511, through channel 5111, groove portion 5112, base outer peripheral surface 5113, side wall 51121, top wall 51122, bottom wall 51123, connecting portion 512, limiting portion 5121, supporting portion 5122, sealing portion 513, valve plug 52, second valve port 52a, valve plug channel 521, step portion 522, gasket 53, guide ring 54, cutout portion 541, outer edge portion 542, inner edge portion 543, elastic member 60, sealing member 70; [Specific implementation method]

[0013] In order to enable those skilled in the art to better understand the technical solution provided by the present application, the technical solution of the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The present application focuses on optimizing the design and improvement of the cooperation between the moving iron core and the guide ring of the 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 portion of the guide ring and the side wall of the groove portion. The first gap is connected to the inlet channel, and the medium pressure of the inlet channel can act on the inner edge portion of the guide ring. The guide ring undergoes elastic deformation to keep the outer edge portion of the guide ring against the sleeve, which can relatively ensure the uniformity of the friction contact between the guide ring and the sleeve during the valve actuation process, relatively improve the service life of the solenoid valve, and reduce the possibility of friction contact between the moving iron core and the sleeve. For other components such as the static iron core, valve plug, valve body, etc., adaptive improvements can be made according to the use environment or design.

[0014] Reference Figure 1-3The figure shows a specific embodiment of the solenoid valve provided by the present application. The solenoid valve includes a valve body 10, a threaded member 20, a sleeve 30, a static iron core 40 and a core assembly 50. The valve body 10 includes a first valve port portion 10a. The valve body 10 is provided with an inlet channel 11, a transition channel 14 and an outlet channel 12. The medium pressure in the inlet channel 11 is greater than the medium pressure in the outlet channel 12. The outlet channel 12 is connected to the atmosphere. The valve plug 52 can abut against or be away from the first valve port portion 10a. The air medium enters from the inlet channel 11 through the first valve port portion 10a and the transition channel 14 and is discharged from the outlet channel 12. The valve body 10 An external threaded portion 13 is also provided, and the threaded member 20 is provided with an internal threaded portion 21 threadably matched with the external threaded portion 13. The sleeve 30 includes a main body portion 31 and a flange portion 32 extending outwardly from the main body portion 31 in the circumferential direction. One end of the main body portion 31 is fixedly connected to the static iron core 40. The threaded member 20 includes a pressing portion 22. The flange portion 32 is tightly matched with the valve body 10 through the threads of the internal threaded portion 21 and the external threaded portion 13. The sealing member 70 is limited in the mounting groove of the valve body 10, one side of the flange portion 32 is against the sealing member 70, and the other side of the flange portion 32 facing away from the sealing member 70 is against the pressing portion 22 to prevent air medium from leaking from this part.

[0015] The core assembly 50 includes a moving iron core 51, a valve plug 52 and a gasket 53. The moving iron core 51 and the valve plug 52 are limitedly connected. The elastic member 60 is located between the static iron core 40 and the moving iron core 51. One end of the elastic member 60 abuts against the static iron core 40, and the other end of the elastic member 60 abuts against the moving iron core 51. The moving iron core 51 includes a base portion 511 and a connecting portion 512. The base portion 511 and the connecting portion 512 can be set as an integral structure. The base portion 511 extends axially upward from the connecting portion 512. The base portion 511 is provided with a through hole 5111 that passes through the upper and lower surfaces of the base portion. The through hole 5111 includes a vertical hole and an inclined hole. The moving iron core 51 The valve plug 52 also includes a sealing portion 513 axially protruding downward from the lower surface of the base portion 511, the valve plug 52 is provided with a second valve opening portion 52a, the valve plug 52 is provided with a second channel 521 penetrating the upper and lower surfaces of the valve plug, the sealing portion 513 can abut against or be away from the second valve opening portion 52a, the valve plug 52 is also provided with a step portion 522, the connecting portion 512 is provided with a limiting portion 5121 and a supporting portion 5122, the limiting portion 5121 can abut against or be away from the step portion 522, the gasket 53 is located at the outer periphery of the base portion 511, the gasket 53 is supported by the supporting portion 5122, and the outer periphery of the sleeve 30 is sleeved with a coil component;

[0016] The core assembly 50 further includes a guide ring 54. The base portion 511 of the moving iron core 51 is provided with a groove portion 5112. The number of groove portions can be at least one. In this embodiment, two groove portions are provided. The groove portion 5112 is recessed inward from the outer peripheral surface 5113 of the base portion 511. The guide ring 54 is limited in the groove portion 5112. The groove portion 5112 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, wherein D1>D2, Figure 1-4 Reference Figure 5 As shown, the guide ring 54 includes an outer edge portion 542 and an inner edge portion 543, and 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, after air enters from the inlet channel 11, it can squeeze the inner edge portion 543 of the guide ring 54 with the help of the first gap S1, and the guide ring 54 can be elastically deformed so that the outer edge portion 542 remains against and slidably fits with the inner wall of the main body portion 31 of the sleeve 30, which can reduce the situation where the guide ring and the sleeve are repeatedly in unilateral friction contact due to radial displacement of the moving iron core or the sleeve during the valve actuation process, and can relatively guarantee the uniformity of the friction contact between the guide ring and the sleeve during the valve actuation process, and relatively improve the service life of the solenoid valve, and the outer diameter D1 of the guide ring is greater than the outer diameter D2 of the base portion, and the guide ring and the sleeve are always in friction fit during the actuation, which can reduce the possibility of friction contact between the moving iron core and the sleeve, wherein 0<S1≤0.1mm.

[0017] The guide ring 54 is also provided with a cutout portion 541, and the cutout portion 541 is provided with a cutout channel, which penetrates the upper and lower surfaces of the guide ring, and is communicated with the inlet channel 11 on one side along the axial direction, and is communicated with the cavity between the static iron core 40 and the moving iron core 51 on the other side along the axial direction. After entering from the inlet channel 11, air can quickly enter the cavity between the static iron core and the moving iron core through the cutout portion 541 and then enter the through-hole 5111 to act on the valve plug 52, so that the valve plug 52 is kept against the first valve opening portion 10a, which is conducive to closing the valve;

[0018] It is defined that there is a second gap S2 between the outer surface 5113 of the base portion 511 and the inner wall of the main body portion 31, wherein 0.2mm≤S2≤0.3mm. If S2 is set too small, it is easy to cause wear between the moving iron core 51 and the sleeve. If S2 is set too large, it affects the excitation effect between the moving iron core 51 and the static iron core 40. In order to achieve better wear resistance and lift valve life, the material hardness of the guide ring 54 can be lower than the material hardness of the sleeve. For example, the guide ring 54 can be made of POM material, PEEK material, or PPS material.

[0019] The operating principle of the solenoid valve is described below. When the coil component is energized, the moving iron core 51 moves axially upward toward the static iron core 40 under the excitation of the coil component, and the elastic member 60 is compressed. As the sealing portion 5112 moves away from the second valve opening portion 52a, the gas pressure accumulated in the through-hole 5111 and the gas pressure above the through-hole 5111 are quickly discharged outward through the valve plug channel 521, and the moving iron core 51 continues to move upward until the limit portion 5121 abuts against the step portion 522. The moving iron core 51 moves upward with the valve plug 52, and the valve plug 52 moves away from the first valve opening portion 10a. The first valve opening portion 10a is opened, and the solenoid valve is in a fully open state. At this time, the limit portion 5121 abuts against the step portion 522, and the gasket 53 abuts against the flange portion 32. There is a gap between the guide ring 54 and the top wall 51122 of the groove portion, and the guide ring 54 and the groove portion the bottom wall 51123 of the valve plug 52 is abutted against; when the coil component is in the power-off state, due to the reduction of the excitation of the coil component and the restoring force of the elastic member 60, the valve plug 52 is abutted against the first valve mouth portion 10a, and the sealing portion 513 is abutted against the second valve mouth portion 52a. At this time, the limiting portion 5121 is away from the step portion 522, and the gasket 53 is away from the flange portion 32. At this time, the air medium in the inlet channel 11 applies a force to the valve plug 52 through the cutout portion 541, the cavity between the static iron core and the moving iron core, and the through channel 5111 to keep the valve plug 52 against the first valve mouth portion 10a. Under the action of the medium pressure, the guide ring 54 is abutted against the top wall 51122 of the groove portion, and there is a gap between the guide ring 54 and the bottom wall 51123 of the groove portion, that is, a gap is provided between the axial direction of the guide ring 54 and the top wall or bottom wall of the groove portion, which can facilitate the limiting connection between the guide ring 54 and the groove portion.

[0020] The present invention provides a solenoid valve, comprising a valve body, a core assembly and a sleeve, wherein the valve body is provided with an inlet channel, the core assembly comprises a moving iron core and a guide ring, the moving iron 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 limited to the groove portion, and the outer diameter of the guide ring is greater than the outer diameter of the base portion;

[0021] The guide ring includes an inner edge portion and an outer edge portion. A first gap is provided between the inner edge portion and the side wall of the groove portion. The first gap is connected to the inlet channel. The guide ring can undergo elastic deformation. The outer edge portion abuts against and slides against the sleeve.

[0022] Through the above design, the outer diameter of the guide ring is larger than the outer diameter of the base part, and a first gap is provided between the inner edge part and the side wall of the groove part, the first gap is connected to the inlet channel, the medium pressure of the inlet channel can act on the inner edge part of the guide ring, and the guide ring undergoes elastic deformation so that the outer edge part of the guide ring maintains contact and sliding fit with the sleeve, which can relatively ensure the uniformity of the friction contact between the guide ring and the sleeve during the valve actuation process, relatively improve the service life of the solenoid valve, and reduce the possibility of friction contact between the moving iron core and the sleeve. It should be noted that the directional nouns such as inside and outside or ordinal numbers such as "first, second" mentioned in this article are all based on the drawings in the specification and are introduced for the convenience of description; it does not mean that any order of the components is limited. The throttle valve provided by the relevant technical solution is introduced in detail above, and the specific embodiments are used in this article for elaboration. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention, and does not impose any form of limitation on the present invention.

Claims

1. A solenoid valve, characterized in that: It includes a valve body, a core assembly and a sleeve, the valve body is provided with an inlet channel, the core assembly includes a moving iron core and a guide ring, the moving iron 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 limited to the groove portion, the guide ring can undergo elastic deformation, the guide ring includes 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 be abutted against and slidably fitted 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 is connected to the inlet channel.

2. The solenoid valve according to claim 1, characterized in that: The solenoid valve includes a stationary iron core, the guide ring is provided with a cutout portion, the cutout portion forms a cutout channel, the cutout channel is connected to the inlet channel on one side along the axial direction, and the cutout channel is connected to the cavity between the stationary iron core and the moving iron core on the other side along the axial direction.

3. The solenoid valve according to claim 1, characterized in that: The first gap is defined as S1, wherein 0<S1≤0.1 mm.

4. The solenoid valve according to claim 1, characterized in that: The base portion includes a base outer surface, and a second gap S2 is defined between the base outer surface and the sleeve, wherein 0.2 mm≤S2≤0.3 mm.

5. The solenoid valve according to any one of claims 1 to 4, characterized in that: The material hardness of the guide ring is lower than the material hardness of the sleeve.

6. The solenoid valve according to claim 5, characterized in that: The guide ring is made of POM material, PEEK material or PPS material.

7. The solenoid valve according to any one of claims 1 to 4, characterized in that: The groove portion includes a top wall and a bottom wall, the core body assembly includes a valve plug, the valve plug is limitedly connected to the moving iron core, the valve body is provided with a first valve opening portion, and the valve plug is provided with a second valve opening portion. When the solenoid valve is in a closed valve state, the sealing portion of the moving iron core abuts against the second valve opening portion, the valve plug abuts against the first valve opening portion, the guide ring has a gap with the bottom wall, and the guide ring abuts against the top wall.

8. The solenoid valve according to any one of claims 1 to 4, characterized in that: The groove portion includes a top wall and a bottom wall, the core body assembly includes a valve plug, the valve plug is limitedly connected to the moving iron core, the valve body is provided with a first valve port portion, and the valve plug is provided with a second valve port portion. When the solenoid valve is in an open state, the sealing portion of the moving iron core is away from the second valve port portion, and the valve plug is away from the first valve port portion. There is a gap between the guide ring and the top wall, and the guide ring is against the bottom wall.

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