Valve core of regulating valve

Abstract

The utility model discloses a valve core of a regulating valve, which comprises an upper end part and a cylindrical lower end part, the lower end part comprises a bottom surface far away from the upper end part and a side surface surrounding the outer edge of the bottom surface, the side surface is provided with an arc-shaped groove, and the bottom surface is provided with a notch communicated with the groove. And the medium flows along the groove, so that the pressure loss caused by the change of the flow direction is avoided, and the flow resistance is smaller. By using the regulating valve, micro flow regulation can be realized, the whole-course guide stability is good, and the regulating valve can be designed to have different flow characteristics such as equal percentage or straight line by changing the depths of different positions of the groove.

Description

Technical Field

[0001] This utility model belongs to the field of regulating valve technology, and specifically relates to a valve core of a regulating valve. Background Technology

[0002] Control valves are a common type of valve. The valve core and seat, as components of a control valve, play a crucial role in controlling flow, regulating pressure, and shutting off. The position of the valve core determines the size of the passage for fluid through the control valve, thus precisely controlling the flow rate of the medium. By changing the gap between the valve core and the valve seat, the flow rate and velocity of the fluid can be adjusted; the movement of the valve core can change the pressure difference across the control valve; in the closed state, the valve core and valve seat are tightly fitted, preventing fluid from passing through.

[0003] When regulating small flow rates, traditional plunger-type valve cores require a certain gap between the valve seat and the valve core due to the influence of machining and assembly precision. At the same time, the valve core is prone to deflection during opening because there is no guide underneath, and it is easily affected by the force of the medium, which changes the throttling area and ultimately leads to deviation in flow capacity, affecting the valve's closing and leakage. Under long-term alternating stress, the valve core may also experience fatigue fracture. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a valve core that can achieve micro-flow regulation and has good guiding stability throughout the process.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a valve core of a regulating valve, comprising an upper end and a cylindrical lower end, wherein the lower end includes a bottom surface away from the upper end and a side surface surrounding the outer edge of the bottom surface, wherein the side surface is provided with an arc-shaped groove, and the bottom surface is provided with a notch communicating with the groove.

[0006] Compared to traditional valve cores, the regulating valve of this invention, when opened, allows the medium to flow along the groove without pressure loss due to changes in flow direction, resulting in lower flow resistance. This regulating valve enables minute flow rate adjustments, offers excellent overall guiding stability, and can be designed to produce different flow characteristics, such as equal percentage or linear flow, by varying the depth of the groove at different locations.

[0007] As a further feature of this invention, there are at least two grooves, which are rotationally symmetrical along the axis of the lower end.

[0008] The above scheme ensures that the force exerted on the valve core by the medium during flow is as balanced as possible. Preferably, four grooves are provided on the lower end.

[0009] As a further feature of this utility model, the groove includes an upper groove and a lower groove that are interconnected. The notch is located on the side of the lower groove away from the upper groove. The inner wall of the lower groove has a radial cross-section along the lower end that is arc-shaped, and the inner wall of the lower groove has an axial cross-section along the lower end that is a straight line parallel to the axis of the lower end.

[0010] The above approach improves the adjustment effect.

[0011] As a further feature of this invention, the width of the upper groove opening gradually decreases from the connection point between the upper and lower grooves towards the upper end, and the depth of the upper groove gradually decreases from the connection point between the upper and lower grooves towards the upper end.

[0012] The above method improves the adjustment effect. The width of the upper groove refers to the circumferential width of the groove opening along the lower end, and the depth of the upper groove refers to the radial distance from the groove opening to the bottom of the groove along the upper end.

[0013] As a further feature of this invention, the groove of the upper groove is a semi-elliptical or semi-circular shape that is recessed towards the upper end.

[0014] As a further feature of this invention, the length of the upper groove opening is greater than the length of the lower groove opening along the axial direction of the lower end.

[0015] The above approach improves the adjustment effect.

[0016] As a further feature of this utility model, a stepped surface is provided between adjacent lower grooves. The stepped surface includes an end face one and an end face two. The end face one is opposite to the upper end and is parallel to or coincides with the radial surface of the lower end. The end face two is an arc surface, and the virtual cylinder on which the end face two is located is coaxially arranged with the lower end.

[0017] The above solution facilitates the smooth insertion of the valve core into the valve seat.

[0018] As a further feature of this invention, the upper end includes a limiting part connected to the lower end. The limiting part is a frustum-shaped portion that tapers towards the lower end, and the axis of the limiting part coincides with the axis of the lower end.

[0019] Using the above solution, the limiting part cooperates with the appropriate valve seat to achieve valve sealing.

[0020] As a further feature of this invention, the cross-section of the limiting part along its own axis is an isosceles trapezoid, and the included angle between the two legs of the isosceles trapezoid is 50° to 70°.

[0021] Using the above scheme, a 60° included angle is preferred to achieve better sealing.

[0022] The present invention will now be further described with reference to the accompanying drawings. Attached Figure Description

[0023] Appendix Figure 1 This is a perspective view of a specific embodiment of the present utility model;

[0024] Appendix Figure 2 This is a front view of a specific embodiment of the present utility model;

[0025] Appendix Figure 3 This is a bottom view of a specific embodiment of the present utility model;

[0026] Appendix Figure 4 This is a cross-sectional view of a specific embodiment of the present utility model;

[0027] Appendix Figure 5 This is a schematic diagram of the open state during actual use of a specific embodiment of this utility model;

[0028] Appendix Figure 6 This is a schematic diagram of the closed state during actual use of a specific embodiment of this utility model.

[0029] Upper end 1, limiting part 11, lower end 2, bottom surface 21, side surface 22, groove 3, upper groove 31, lower groove 32, notch 4, stepped surface 5, end face 1 51, end face 2 52, valve seat body 6, through hole 61, inclined surface 611. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that, unless otherwise specified, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Specific embodiments of this utility model are shown in the accompanying drawings.

[0033] A control valve core includes an upper end portion 1 and a cylindrical lower end portion 2. The lower end portion 2 includes a bottom surface 21 away from the upper end portion 1 and a side surface 22 surrounding the outer edge of the bottom surface 21. The side surface 22 has an arc-shaped groove 3, and the bottom surface 21 has a notch 4 communicating with the groove 3. Compared with conventional valve cores, when the control valve of this embodiment is opened, the medium flows along the groove 3 without pressure loss due to changes in flow direction, resulting in lower flow resistance. The control valve of this embodiment can achieve minute flow rate regulation, has good guiding stability throughout the entire process, and by changing the depth of different positions of the groove 3, this embodiment can be designed to have different flow characteristics such as equal percentage or linear flow.

[0034] In this embodiment, four grooves 3 are provided on the lower end 2, and all grooves 3 are rotationally symmetrical along the axis of the lower end 2. This ensures that the force exerted on the valve core by the medium during flow is as balanced as possible.

[0035] The groove 3 includes an upper groove 31 and a lower groove 32 that are interconnected. A notch 4 is located on the side of the lower groove 32 away from the upper groove 31. The inner wall of the lower groove 32 has a circular arc-shaped cross-section along the radial direction of the lower end 2, and its cross-section along the axial direction of the lower end 2 is a straight line parallel to the axis of the lower end 2. The width of the groove opening of the upper groove 31 gradually decreases from the connection point between the upper groove 31 and the lower groove 32 towards the upper end 1, and the depth of the upper groove 31 gradually decreases from the connection point between the upper groove 31 and the lower groove 32 towards the upper end 1. The width of the groove opening of the upper groove 31 refers to the circumferential width of the groove opening along the lower end 2, and the depth of the upper groove 31 refers to the distance from the groove opening to the bottom of the groove along the radial direction of the upper end 1. This improves the adjustment effect.

[0036] The opening of the upper groove 31 is a semi-elliptical or semi-circular shape that is recessed towards the upper end 1. Along the axial direction of the lower end 2, the length of the opening of the upper groove 31 is greater than the length of the opening of the lower groove 32, thus improving the adjustment effect.

[0037] A stepped surface 5 is provided between adjacent lower grooves 32. The stepped surface 5 includes an end face 51 and an end face 52. The end face 51 faces away from the upper end 1 and is parallel to or coincides with the radial surface of the lower end 2. The end face 52 is an arc surface, and the virtual cylinder containing the end face 52 is coaxially arranged with the lower end 2. This facilitates the smooth insertion of the valve core into the valve seat.

[0038] The upper end portion 1 includes a limiting portion 11 connected to the lower end portion 2. The limiting portion 11 is a frustum-shaped portion that tapers towards the lower end portion 2, and the axis of the limiting portion 11 coincides with the axis of the lower end portion 2. The limiting portion 11 cooperates with a suitable valve seat to achieve valve sealing.

[0039] In this embodiment, the limiting part 11 has an isosceles trapezoidal cross section along its own axis, and the included angle α between the two legs of the isosceles trapezoid is 60°, which can achieve better sealing performance.

[0040] The valve seat adapted to this embodiment is shown in the attached figure. Figure 5-6 As shown, it includes a valve seat body 6 and a through hole 61 provided on the valve seat body 6 for insertion in this embodiment. The inner wall of the through hole 61 is provided with an inclined surface 611 on the side near the upper end 1, which can form a limit with the limiting part 11. When the regulating valve is in the closed state, the inclined surface 611 is in contact with the outer wall of the limiting part 11.

[0041] This utility model is not limited to the specific embodiments described above. Those skilled in the art can implement this utility model using other specific embodiments based on the content disclosed in this utility model. Any simple changes or modifications made to the design structure and concept of this utility model will fall within the protection scope of this utility model.

Claims

1. A valve core for a regulating valve, characterized in that: It includes an upper end and a cylindrical lower end, the lower end including a bottom surface away from the upper end and a side surface surrounding the outer edge of the bottom surface, the side surface having an arc-shaped groove, and the bottom surface having a notch communicating with the groove.

2. The valve core of a regulating valve according to claim 1, characterized in that: The grooves are at least two in number and are rotationally symmetrical along the axis of the lower end.

3. The valve core of a regulating valve according to claim 2, characterized in that: The groove includes an upper groove and a lower groove that are interconnected. The notch is located on the side of the lower groove away from the upper groove. The inner wall of the lower groove has a radial cross-section that is arc-shaped along the lower end. The inner wall of the lower groove has an axial cross-section that is a straight line parallel to the axis of the lower end.

4. The valve core of a regulating valve according to claim 3, characterized in that: The width of the upper groove opening gradually decreases from the connection point between the upper and lower grooves towards the upper end, and the depth of the upper groove gradually decreases from the connection point between the upper and lower grooves towards the upper end.

5. The valve core of a regulating valve according to claim 4, characterized in that: The groove opening of the upper groove is a semi-elliptical or semi-circular shape that is recessed towards the upper end.

6. The valve core of a regulating valve according to claim 5, characterized in that: Along the axial direction of the lower end, the length of the upper groove opening is greater than the length of the lower groove opening.

7. The valve core of a regulating valve according to claim 6, characterized in that: A stepped surface is provided between adjacent lower grooves. The stepped surface includes end face one and end face two. End face one is opposite to the upper end and is parallel to or coincides with the radial surface of the lower end. End face two is an arc surface and the virtual cylinder on which end face two is located is coaxially arranged with the lower end.

8. The valve core of a regulating valve according to claim 1, 2, 3, or 7, characterized in that: The upper end includes a limiting part connected to the lower end. The limiting part is a frustum-shaped part that tapers towards the lower end, and the axis of the limiting part coincides with the axis of the lower end.

9. The valve core of a regulating valve according to claim 8, characterized in that: The limiting part has an isosceles trapezoidal cross section along its own axis, and the included angle between the two legs of the isosceles trapezoid is 50° to 70°.

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