A control valve

Abstract

In the control valve of this embodiment, in the radial direction of the valve core component, the elastic support member abuts the sealing member, the outer side surface abuts the guide surface of the guide portion, the outer circumferential surface of the matching portion of the valve core body corresponds to the guide surface, and the bottom surface of the annular groove corresponds to the inner side surface. The guide surface diameter is defined as D1, the matching portion outer circumferential diameter is defined as D2, the inner side diameter is defined as E1, and the bottom surface diameter of the annular groove is defined as E2. Thus, D1-D2>E1-E2. Compared to the prior art, the control valve of this embodiment ensures the reliable operation of the valve core component in various installation orientations.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, and in particular to a control valve. Background Art

[0002] Figure 1 It is a cross-sectional schematic diagram of a control valve in the background art; Figure 2 for Figure 1 A partial enlarged schematic diagram of the control valve. Figure 1 、 Figure 2 As shown, the control valve includes a valve body 01, a valve cover 02, and a valve core component 03. Valve body 01 is fixedly connected to valve cover 02. Valve body 01 includes a guide inner wall 011. Valve core component 03 includes a valve core 031 and a valve core ring 032. Valve core ring 032 is disposed in an annular groove 030 of valve core 031. The outer peripheral wall 0321 of valve core ring 032 slides in contact with guide inner wall 011. Define the gap between the outer wall 0311 of the valve core 031 and the guide inner wall 011 as A, and the gap between the bottom surface 0312 of the annular groove 030 and the inner wall 0322 of the valve core ring 032 as B. In this structure, since A is less than B, when the control valve is installed at an angle or sideways relative to the direction of gravity, the outer wall 0311 of the valve core 031 will contact the guide inner wall 011 under the action of gravity. During the movement of the valve core component 03, the metal valve core 031 rubs against the metal guide inner wall 011, resulting in large friction resistance, which affects the reliability of the control valve.

[0003] In view of this, how to optimize the structure of the valve core component of the control valve so that the control valve is suitable for different installation directions is an issue that those skilled in the art need to consider. Summary of the Invention

[0004] The control valve provided by the present invention includes a valve body component and a valve core component, the valve body component includes a guide portion, the valve core component can slide relative to the guide portion, the valve core component includes a valve core body, a sealing member and an elastic support member, the valve core body includes an annular groove, the sealing member is in the shape of an open ring, the sealing member includes an inner side surface and an outer side surface, the sealing member is partially located in the annular groove, the elastic support member is located in the annular groove, in the radial direction of the valve core component, the elastic support member is against the seal, the outer side surface is against the guide surface of the guide portion, the valve core body includes a matching portion, the outer peripheral surface of the matching portion corresponds to the guide surface, and the bottom surface of the annular groove corresponds to the inner side surface, the diameter of the guide surface is defined as D1, the diameter of the outer peripheral surface of the matching portion is defined as D2, the diameter of the inner side surface is defined as E1, and the diameter of the bottom surface of the annular groove is defined as E2, then D1-D2>E1-E2 is satisfied.

[0005] In the control valve of this embodiment, in the radial direction of the valve core component, the elastic support member abuts the sealing member, the outer side surface abuts the guide surface of the guide portion, the outer circumferential surface of the matching portion of the valve core body corresponds to the guide surface, and the bottom surface of the annular groove corresponds to the inner side surface. The guide surface diameter is defined as D1, the matching portion outer circumferential diameter is defined as D2, the inner side diameter is defined as E1, and the bottom surface diameter of the annular groove is defined as E2. Thus, D1-D2>E1-E2. Compared to the prior art, the control valve of this embodiment ensures the reliable operation of the valve core component in different installation orientations. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 : A cross-sectional schematic diagram of a control valve in the background art;

[0007] Figure 2 : Figure 1 A partial enlarged schematic diagram of the middle control valve;

[0008] Figure 3 : A cross-sectional schematic diagram of a control valve in a fully open state provided by the present invention;

[0009] Figure 4 : Figure 3 The enlarged schematic diagram of point I in the middle;

[0010] Figure 5 : Partial cross-sectional diagram when the control valve is side mounted;

[0011] Figure 6 : Figure 3 A cross-sectional diagram of the valve core component;

[0012] Figure 7 : Figure 3 Schematic diagram of the structure of the middle seal;

[0013] Figure 8 : Figure 3 Schematic diagram of the structure of the elastic support member.

[0014] Figure 3-Figure 8 Explanation of symbols:

[0015] 1-valve body, 10-valve chamber, 101-first chamber, 102-second chamber;

[0016] 11-valve body, 111-main valve port, 112-fluid inlet, 113-fluid outlet;

[0017] 12-valve cover, 121-guide portion, 1211-guide surface, 122-sky portion, 1220-through hole;

[0018] 2-valve core component, 21-valve core body, 210-annular groove, 211-bottom surface;

[0019] 212 - mating portion, 213 - upper end portion, 2130 - communicating channel, 214 - outer peripheral surface;

[0020] 22-seal, 220-groove, 221-inner side, 222-outer side;

[0021] 223-first end surface, 224-second end surface, 23-elastic support member;

[0022] 3-control component, 31-sleeve, 32-moving iron core component. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying any creative work. The directional words such as upper and lower involved in this article are defined by the positions of the parts relative to each other shown in the drawings. They are only for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by this application.

[0024] Figure 3 This is a cross-sectional schematic diagram of a control valve in a fully open state provided by the present invention; Figure 4 for Figure 3 The enlarged schematic diagram of point I in the middle; Figure 5 It is a partial cross-sectional diagram when the control valve is side mounted; Figure 6 for Figure 3 A cross-sectional diagram of the valve core component; Figure 7 for Figure 3 Schematic diagram of the structure of the middle seal; Figure 8 for Figure 3 Schematic diagram of the structure of the elastic support member.

[0025] As shown in the figure, the control valve in this embodiment is a solenoid valve, which includes a valve body component 1, a valve core component 2, and a control component 3. The valve core component 2 is arranged in a valve cavity 10 of the control valve.

[0026] In this embodiment, the valve body component 1 includes a valve body 11 and a valve cover 12. The valve cover 12 includes a guide portion 121. The valve body 11 includes a main valve port portion 111. The valve core component 2 can slide relative to the guide portion 121. That is, the valve core component 2 can move axially relative to the valve cover 12 to abut the main valve port portion 111. The outer wall of the guide portion 121 is provided with an external thread, and the inner wall of the valve body 11 is provided with an internal thread. The valve body 11 and the valve cover 12 are fixed by screwing the external thread and the internal thread. The valve body 11 includes a fluid inlet 112 and a fluid outlet 113. When the control valve is in the closed state, the fluid inlet 112 and the fluid outlet 113 are not connected, and the main valve port of the main valve port portion 111 is connected to the fluid outlet 113.

[0027] In this embodiment, the valve core component 2 includes a valve core body 21, a seal 22, and an elastic support member 23. The valve core body 21 includes an annular groove 210, which is formed on the outer periphery of the valve core body 21. The seal 22 is made of a plastic material, specifically PTFE. The seal 22 is located within the annular groove 210 and is in the shape of an open circular ring, including an inner side surface 221 and an outer side surface 222. The elastic support member 23 is made of stainless steel wire and is in the shape of an open circular ring. The elastic support member 23 is located in the annular groove 210. When the elastic support member 23 is installed, the elastic support member 23 has tension toward the guide surface 1211. That is, in the radial direction of the valve core component 2, the elastic support member 23 and the seal 22 abut against each other, so that the outer side surface 222 of the seal 22 abuts against the guide surface 1211 of the guide portion 121, and the outer side surface 222 of the seal 22 slides with the guide surface 1211 of the guide portion 121.

[0028] The guide surface 1211 of the guide portion 121 has a circular cross-section. The valve core body 21 is generally cylindrical and includes a mating portion 212. The outer circumference of the mating portion 212 corresponds to the guide surface 1211. Here, "the outer circumference of the mating portion 212" does not include the bottom surface 211 of the annular groove 210. The bottom surface 211 of the annular groove 210 corresponds to the inner surface 221 of the sealing member 22. If the diameter of the guide surface 1211 is defined as D1, the diameter of the outer circumference 214 of the valve core body 21 is defined as D2, the diameter of the inner surface 221 of the sealing member 22 is defined as E1, and the diameter of the bottom surface 211 of the annular groove 210 is defined as E2, then D1-D2>E1-E2.

[0029] In this embodiment, the bilateral clearance between the outer peripheral surface 214 of the valve core body 21 and the guide surface 1211 is set to be larger than the bilateral clearance between the bottom surface 211 of the annular groove 210 and the inner side surface 221 of the sealing member 22, so that the control valve can be applied to different installation directions, whether it is upright installation (refer to Figure 3 ) or tilt installation, side installation (refer to Figure 5), a gap is maintained between the valve core body 21 and the guide portion 121 regardless of the installation orientation. During movement of the valve core component 2, the outer side surface 222 of the seal 22 is able to consistently slide in engagement with the guide surface 1211 of the guide portion 121. Compared to the prior art, this embodiment offers low frictional resistance, improving the operational reliability of the valve core component 2. The outer peripheral surface 214 of the valve core body 21 will not rub against the guide surface 1211, preventing the valve core component 2 from becoming stuck due to powder generated by metal-to-metal friction, thereby ensuring the operational reliability of the control valve.

[0030] like Figure 4 、 Figure 6 As shown, the sealing member 22 includes a groove 220, the notch of the groove 220 faces the bottom surface 211 of the annular groove 210, and the elastic support member 23 is located in the groove 220. The elastic support member 23 is positioned by providing the groove 220 to ensure that the elastic support member 23 always applies a radially outward force toward the valve core component to the sealing member 22.

[0031] like Figure 7 As shown, since the seal 22 is an open ring, comprising a first end face 223 and a second end face 224 disposed opposite the first end face 223, the first and second end faces 223, 224 being matching inclined surfaces, when the seal 22 is installed, the gap H between the first and second end faces 223, 224 satisfies the requirement of H ≤ 0.3 mm. If H is greater than 0.3 mm, the fluid below the seal 22 will flow excessively through the gap H into the upper side of the seal 22, affecting the control valve's opening performance.

[0032] Further, such as Figure 6 As shown, annular grooves 210 are provided in the mating portion 212. There are two annular grooves 210. The length of the mating portion 212 is G, and the center distance between the two annular grooves 210 is F. Then, |G / 2-F / 2| < 20% G / 2 is satisfied. That is, the deviation between the center lines of the two annular grooves 210 and the center line of the mating portion 212 is within 20%. This arrangement places the center of gravity of the valve core component 2 between the two annular grooves 210, ensuring smooth movement of the valve core component 2 and preventing it from deflecting.

[0033] Further, such as Figure 6 As shown, F>G / 2 is set, that is, the two annular grooves 210 are respectively close to the upper and lower ends of the valve core body 21, which can ensure that the valve core component 2 moves more smoothly and is not prone to deflection.

[0034] like Figure 3 、 Figure 4As shown, the valve cover 12 also includes a skylight 122 with a through-hole 1220. The control component 3 includes a sleeve 31 and a movable iron core component 32. The lower section of the sleeve 31 is welded to the wall of the hole forming the through-hole 1220, and the movable iron core component 32 is slidable relative to the sleeve 31. The upper end 213 of the valve core body 21 can abut against the skylight 122, and the upper end 213 of the valve core body 21 is located above the mating portion 212. When the valve core body 21 abuts against the skylight 122, the valve chamber 10 of the control valve includes a first chamber 101 and a second chamber 102. The first chamber 101 is located within the valve core body 21, and the second chamber 102 is located circumferentially outside the valve core body 21 and above the sealing member 22. The upper end 213 of the valve core body 21 includes a communication channel 2130, which connects the first chamber 101 and the second chamber 102. When the valve core body 21 and the ceiling part 122 are against each other, negative pressure adsorption force is likely to appear between the valve core body 21 and the ceiling part 122, and the disengagement resistance is large, especially when the control valve is used in an oil system, it is even more difficult to disengage. By setting a connecting channel 2130 to connect the first chamber 101 and the second chamber 102, the negative pressure adsorption force can be reduced, the disengagement resistance between the two is reduced, and the valve closing performance of the control valve is improved.

[0035] Furthermore, this embodiment specifies specific parameters for the bilateral clearance between the outer circumferential surface 214 of the valve core 21 and the guide surface 1211, as well as the bilateral clearance between the bottom surface 211 of the annular groove 210 and the inner surface 221 of the seal 22. Specifically, the following requirements are met: 0.3mm < D1-D2 < 0.6mm; 0.1mm < E1-E2 < 0.26mm. By properly setting these clearances, while ensuring that the valve core 21 and the guide portion 121 of the valve cover 12 do not contact each other, the valve core assembly moves more smoothly and is more resistant to impurities.

[0036] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A control valve comprising a valve body and a valve core, wherein the valve body comprises a guide portion, and the valve core is capable of sliding relative to the guide portion, wherein: The valve core component includes a valve core body, a sealing member and an elastic support member, the valve core body includes an annular groove, the sealing member includes an inner side surface and an outer side surface, the sealing member is partially located in the annular groove, the elastic support member is located in the annular groove, in the radial direction of the valve core component, the elastic support member and the sealing member are against each other, the outer side surface is against the guide surface of the guide portion, the valve core body includes a matching portion, the outer peripheral surface of the matching portion corresponds to the guide surface, and the bottom surface of the annular groove corresponds to the inner side surface. Define the diameter of the guide surface as D1, the diameter of the outer peripheral surface of the matching portion as D2, the diameter of the inner side surface as E1, and the diameter of the bottom surface of the annular groove as E2, then D1-D2>E1-E2 is satisfied.

2. The control valve according to claim 1, wherein: The sealing member is in an open ring shape and includes a groove, the notch of the groove faces the bottom surface of the annular groove, and the elastic support member is located in the groove.

3. The control valve according to claim 2, wherein: The sealing member is made of PTFE and includes a first end face and a second end face arranged opposite to the first end face. The first end face and the second end face are matching inclined surfaces. When the sealing member is in the installed state, the gap H between the first end face and the second end face satisfies: 0.1mm≤H≤0.3mm; the elastic support member is made of stainless steel wire and is in the shape of an open ring. When the elastic support member is in the installed state, the elastic support member has tension toward the guide surface.

4. The control valve according to claim 1, wherein: There are two annular grooves, and the annular grooves are provided in the matching portion. The length of the matching portion is defined as G, and the center distance between the two annular grooves is defined as F, then |G / 2-F / 2|<20%G / 2.

5. The control valve according to claim 1, wherein: There are two annular grooves, and the annular grooves are provided in the matching portion. The length of the matching portion is defined as G, and the center distance between the two annular grooves is defined as F, then F>G / 2 is satisfied.

6. The control valve according to claim 1, wherein: The valve body component includes a valve body and a valve cover, the valve core component can abut against the main valve port of the valve body, the valve cover includes the guide part and the skylight part, the guide part is fixedly connected to the valve body, and the valve core body can abut against the skylight part.

7. The control valve according to claim 6, wherein: When the valve core body is against the skylight portion, the valve cavity of the control valve includes a first cavity and a second cavity, the first cavity is located in the valve core body, the second cavity is located on the circumferential outside of the valve core body, and the second cavity is located on the upper side of the sealing member, the valve core body also includes a connecting channel, and the connecting channel connects the first cavity and the second cavity.

8. The control valve according to claim 6, wherein: The control valve is a solenoid valve and further includes a control component. The control component includes a sleeve and a moving iron core component. The lower section of the sleeve is fixedly connected to the valve cover, and the moving iron core component can slide relative to the sleeve.

9. The control valve according to any one of claims 1 to 8, characterized in that: The range of the bilateral clearance between the guide surface and the outer peripheral surface of the valve core body satisfies: 0.3mm<D1-D2<0.6mm; the range of the bilateral clearance between the inner surface and the bottom surface of the annular groove satisfies: 0.1mm<E1-E2<0.26mm.

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