A rotary valve

Abstract

The application discloses a rotary valve, characterized in that the valve further comprises a flow stabilizer arranged in a valve core cavity, the flow stabilizer comprises a base part and a plurality of rib parts, the base part is substantially in the form of a ring column, the plurality of rib parts are at least three, each rib part extends radially outward from a peripheral part of the base part, a radially outer edge part of each rib part is matched with an inner wall part of the valve core, spaces between adjacent rib parts form fluid channels, the base part comprises a flow guide surface between the adjacent rib parts, the flow guide surface extends along an axial direction of the base part, and a profile of a section of the flow guide surface passing through a central axis of the base part comprises a straight line segment and / or an arc line segment.

Description

Technical Field

[0001] This invention belongs to the field of fluid control technology, and specifically relates to a rotary valve. Background Technology

[0002] Rotary valves are widely used in fluid control systems, such as ball valves in water-based central air conditioning systems, to control the flow of chilled (hot) water to maintain stable room temperature. Existing ball valves generally consist of a valve body and a rotating valve core. The rotating valve core is located in the valve chamber of the valve body and has a flow channel. The valve stem drives the rotating valve core to open or close the flow channel of the ball valve. Because ball valves have a large maximum orifice diameter, a large fluid flow rate, a large pressure difference on both sides, and a high fluid velocity, turbulence is generated when the fluid passes through the ball valve's flow channel, resulting in high noise levels and reduced reliability. Summary of the Invention

[0003] To improve the reliability of rotary valves, this invention discloses a rotary valve, including a valve body component, a valve core component, and a drive component. The valve body component specifically includes a valve cavity, a flow path inlet end, and a flow path outlet end. The valve core component includes a valve core placed in the valve cavity, the valve core having a valve core cavity. The drive component can drive the valve core to rotate. It also includes a flow stabilizer placed in the valve core cavity. The flow stabilizer includes a base portion and rib portions. The base portion is generally a cylindrical structure. There are at least three rib portions, each extending radially outward from the periphery of the base portion. The radial outer edge of each rib portion cooperates with the inner wall portion of the valve core. The space between adjacent rib portions forms a fluid channel. The base portion includes a guide surface located between adjacent rib portions. The guide surface extends axially along the base portion. The profile of the cross-section of the guide surface passing through the central axis of the base portion includes a straight line segment and, or an arc segment.

[0004] The technical solution provided by this invention, by setting a flow guide surface on the flow stabilizer, the flow guide surface extends axially along the base portion, which can reduce the turbulence phenomenon generated when the fluid passes through the valve core cavity, reduce noise, and improve the reliability of the rotary valve. Attached Figure Description

[0005] Figure 1 The present invention provides front and side view schematic diagrams of a rotary valve structure;

[0006] Figure 2 : Figure 1 A side view of the valve core component in two rotational positions;

[0007] Figure 3 : Figure 1 A perspective view and a radial cross-sectional view of a specific embodiment of a medium-current stabilizer;

[0008] Figure 4 The present invention provides a perspective view and a radial cross-sectional view of another current stabilizer;

[0009] Figure 5 : A perspective view of the third type of current stabilizer provided in this invention;

[0010] Figure 6 : A perspective view of the fourth type of current stabilizer provided in this invention;

[0011] Figure 7 : A perspective view of the fifth type of current stabilizer provided by this invention.

[0012] Figures 1-7 Explanation of Chinese symbols and illustrations:

[0013] 10- Rotary valve;

[0014] 100 - Valve body components;

[0015] 110 - First valve body, 120 - Flow path inlet end;

[0016] 130 - Second valve body; 140 - Flow path outlet end;

[0017] 200 - Valve core component;

[0018] 210 - Valve core cavity;

[0019] 211 - First fluid channel, 212 - Second fluid channel;

[0020] 213 - Third fluid channel, 214 - Fourth fluid channel;

[0021] 220 - Valve core;

[0022] 221 - Valve port, 222 - Inner wall portion;

[0023] 230 - Valve core seat;

[0024] 300 - Drive components;

[0025] 310 - Valve stem;

[0026] 400 - Valve chamber;

[0027] 500 / 500A / 500B / 500C / 500D - Current stabilizers;

[0028] 510 - First tendon;

[0029] 511 - First outer edge;

[0030] 520 - Second tendon;

[0031] 521 - Second outer edge;

[0032] 530 - Third tendon;

[0033] 531 - Third outer edge;

[0034] 540 - Fourth tendon;

[0035] 541 - Fourth outer edge;

[0036] 550 / 550A / 550B / 550C / 550D - Base section;

[0037] 551 / 551A - First guide surface, 552 - Second guide surface;

[0038] 553 - Third guide surface, 554 - Fourth guide surface;

[0039] 555 - Arc segment;

[0040] 555A - First arc segment, 555B - Second surface segment;

[0041] 556 - Straight line segment;

[0042] 560 - Side surface / curved surface, 670 - Through hole. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. The directional terms such as "upper" and "lower" used herein are defined by the relative positions of the components shown in the drawings, and are only used for clarity and convenience in expressing the technical solutions. It should be understood that the directional terms used herein should not limit the scope of protection claimed in this application.

[0044] The technical concept of the present invention will be explained below using a spherical valve core as a specific embodiment. However, the present invention is not limited to the spherical valve core structure. Any technical solution for opening a rotary valve core can adopt the technology disclosed in the present invention.

[0045] Figure 1 Figure 2 is a schematic diagram of the front and side views of a rotary valve structure provided by the present invention. Figure 3 is a schematic diagram of the side view of the valve core component in two rotational positions as shown in the above figure.

[0046] like Figure 1 and Figure 2As shown. A spherical valve core structure is a common technical solution for rotary valves. In this specific embodiment, the rotary valve 10 includes a valve body component 100, which is formed by threaded connection or welding of a first valve body 110 and a second valve body 130 made of metal material. The first valve body 110 has a flow path inlet end 120, and the second valve body 130 has a flow path outlet end 140.

[0047] The valve core component 200 includes a spherical valve core 220, which is placed in the valve cavity 400 formed by the valve body component 100. The valve core 220 is supported on the first valve body 110 and the second valve body 130 by two annular valve core seats 230, respectively. The valve core 220 has an axial through hole as a valve core cavity 210, in which a flow stabilizer 500 is placed.

[0048] The drive component 300 includes a valve stem 310, the lower end of which is rotatably connected to the valve core 220. The valve stem 310 can drive the valve core 220 to rotate within the valve cavity 400. When the valve stem 310 drives the valve core 220 to rotate 90° (e.g., ...), Figure 1 (As shown in the figure), the flow path inlet 120 and the flow path outlet 140 are connected through the connecting valve core cavity 210, and the ball valve is fully open; when the valve stem 310 drives the valve core 220 to rotate back to 0°, the flow path inlet 120 and the flow path outlet 140 are not connected, and the ball valve is closed.

[0049] Because the ball valve 10 has a large pipe diameter, the high pressure of the fluid at the inlet 120 of the flow path will exert a large force on the valve core 220. On the other hand, during the opening process of the ball valve, the valve core 220 rotates relative to the flow path port to adjust the valve opening. Therefore, in the state where the ball valve is not fully open or not fully closed, some of the high-pressure fluid at the inlet 120 of the flow path will directly impact the surface of the valve core 220 facing the inlet 120 of the flow path and deflect towards the valve port to enter the valve core cavity 210. If no improvement measures are taken, the fluid may experience turbulence, flashing, and cavitation during this process, resulting in high noise. At the same time, it will also damage the surface of the valve core 220 and reduce the sealing performance of the valve.

[0050] Experiments show that when the valve core 220 rotates within the intermediate range, such as 15° to 75° (i.e., when...), Figure 2 View A shows the valve core 220 rotated 15° from the closed state to the open state, and View B shows the valve core 220 rotated 75° from the closed state to the open state. The above problem is quite obvious. To improve the above problem, a flow stabilizer 500 is provided in the valve core cavity 210.

[0051] Figure 3 for Figure 1 A perspective view and a radial cross-sectional view of a specific embodiment of a medium-stability flow element.

[0052] like Figure 3 As shown. In this specific embodiment, the flow stabilizer 500 includes a base portion 550 and ribs. In this embodiment, the base portion 550 has a generally cylindrical (or spindle-shaped) structure along the direction of the fluid channel Q (i.e., the axial direction), and there are four ribs, namely a first rib 510, a second rib 520, a third rib 530, and a fourth rib 540.

[0053] Each rib (510, 520, 530, 540) extends radially outward from the periphery of the base portion 550, and simultaneously extends along the fluid channel direction (i.e., the axial direction Q of the base portion 550). In the axial direction (Q) perpendicular to the base portion, each rib (510, 520, 530, 540) is approximately symmetrically arranged around the axis.

[0054] The radial outer edges of each rib (510, 520, 530, 540) (i.e., the first outer edge 511, the second outer edge 521, the third outer edge 531, and the fourth outer edge 541) are fixedly connected to or abut against the inner wall 222 of the valve core 220, so the space between adjacent ribs forms four fluid channels of the valve core 220 (i.e., the first fluid channel 211, the second fluid channel 212, the third fluid channel 213, and the fourth fluid channel 214). The outer peripheral surface of the base 550 is divided by each rib (510, 520, 530, 540) to form four guide surfaces extending along the axial direction (Q) of the base (i.e., the first guide surface 551, the second guide surface 552, the third guide surface 553, and the fourth guide surface 554).

[0055] In this embodiment, since the base portion 550 is approximately annular cylindrical in shape along the axial direction, the profile of the cross-section of each guide surface passing through the central axis of the base portion 550 is an arc segment. Simultaneously, the profile of the cross-section of the guide surface perpendicular to the axial direction (Q) of the base portion is an arc segment. Of course, as an extension, if the base portion is a square prism structure along the axial direction, the profile of the cross-section of each guide surface passing through the central axis of the base portion 550 is a straight line segment. Further details are omitted here.

[0056] The aforementioned flow stabilizer can improve the stability of the process after the fluid from the inlet end 120 enters each fluid passage (first fluid passage 211, second fluid passage 212, third fluid passage 213 and fourth fluid passage 214), reduce turbulence, flashing and cavitation phenomena that may occur after the fluid impacts the surface of the valve core 220 and the valve port, and improve the noise problem.

[0057] To further improve the smoothness of the fluid, in this embodiment, in the axial direction perpendicular to the base portion 550, the thickness h of the radial outer edge portion (i.e., the first outer edge portion 511, the second outer edge portion 521, the third outer edge portion 531 and the fourth outer edge portion 541) of each rib portion (510, 520, 530, 540) is less than the thickness H of the radial inner edge portion.

[0058] To further improve the smoothness of the fluid, in this embodiment, the radial side of each rib (510, 520, 530, 540) is an arc surface (as shown in the figure, the side 560 of the first rib 510 is an arc surface, and the other sides are also set in the same way). In the axial direction perpendicular to the base, the profile of the cross section of each arc surface is an arc, and the arc degree W of the arc satisfies 0°≤W≤20°.

[0059] In this embodiment, the diameter of the largest circle connecting the outer edges of each rib (i.e., the first outer edge 511, the second outer edge 521, the third outer edge 531, and the fourth outer edge 541) is defined on a cross section perpendicular to the axial direction (Q) of the base portion as R. R is a constant value in different cross sections along the axial direction (Q) of the base portion 550 (see [link to documentation]). Figure 3 On the other hand, the diameter of the largest circle connecting the contours of each guide surface is defined as r on a cross section perpendicular to the axial direction (Q) of the base portion 550. Since the base portion 550 is approximately spindle-shaped along the axial direction (Q), r is a variable value on different cross sections along the axial direction (Q) of the base portion 550. The value of r is smaller towards both ends and larger towards the middle, with a maximum value of r1 (see...). Figure 3 To further improve fluid stability, it is required that r1 ≤ 0.7R. If r1 is too small, the stability control of the fluid is not significant; if r1 is too large, the flow area of ​​the fluid is reduced.

[0060] Figure 4 The figures show a perspective view and a radial cross-sectional view of another flow stabilizer provided by the present invention.

[0061] like Figure 4 As shown. The difference from the aforementioned technical solution lies in that, in this specific embodiment, the flow stabilizer 500A includes a base portion 550A and four ribs. The base portion 550A has a generally cylindrical structure along the axial direction. Each rib extends radially outward from the periphery of the cylinder, and simultaneously extends axially from the periphery of the cylinder.

[0062] The side surfaces 560A of each rib are planar; the outer peripheral surface of the cylindrical base portion 550A is divided by each rib, forming four guide surfaces extending axially along the base portion 550A (the first guide surface 551A is marked in the figure). Since the base portion 550A is approximately cylindrical along the axial direction, the profile of the cross-section of the guide surface (the first guide surface 551A is marked in the figure) passing through the central axis of the base portion 550A is a straight line segment. This technical solution also has the beneficial effects of the aforementioned technical solutions, which will not be elaborated here.

[0063] In this embodiment, the diameter of the largest circle connecting the outer edges of each rib is defined as R2 in a cross-section perpendicular to the axial direction of the base portion, and R2 is a constant value in different cross-sections along the axial direction; the diameter of the circular outline connecting each guide surface is defined as r2 in a cross-section perpendicular to the axial direction of the base portion 550A, and r2 is a constant value in different cross-sections along the axial direction of the base portion 550A. To further improve the fluid stability, it is required that 0.2R ≤ r2 ≤ 0.5R.

[0064] Figure 5 This is a perspective view of the third type of current stabilizer provided by the present invention.

[0065] like Figure 5 As shown. The difference from the aforementioned technical solution lies in that, in this specific embodiment, the flow stabilizer 500B includes a base portion 550B and four ribs. The base portion 550B has a generally cylindrical-conical structure along its axial direction. Each rib extends radially outward from the periphery of the cylindrical-conical structure, and simultaneously extends axially from the periphery of the cylindrical-conical structure. The outer peripheral surface of the base portion 550B of the cylindrical-conical structure is divided by the ribs to form four guide surfaces extending axially along the base portion 550B. The profile of the cross-section of each guide surface passing through the central axis of the base portion 550B includes a straight segment 557 and an arc segment 555B. The profile of the cross-section is such that the portion of the guide surface corresponding to the straight segment 557 faces the inlet end of the flow path, and the profile of the cross-section is such that the other portion of the guide surface corresponding to the arc segment 555B faces the outlet end of the flow path.

[0066] This technical solution also has the same beneficial effects as the aforementioned technical solutions, which will not be elaborated here.

[0067] Figure 6 This is a perspective view of the fourth type of current stabilizer provided by the present invention.

[0068] like Figure 6 As shown. The difference from the aforementioned technical solution lies in that, in this specific embodiment, the flow stabilizer 500C includes a base portion and four rib portions. Each rib portion extends radially outward from the periphery of the base portion, and simultaneously extends axially from the periphery of the base portion. Each rib portion also includes a plurality of through holes 570 extending through the thickness of the rib portion in an axial direction perpendicular to the rib portion.

[0069] This technical solution can further stabilize the fluid and has the beneficial effects of the aforementioned technical solutions, which will not be elaborated here.

[0070] Figure 7 This is a perspective view of the fifth type of current stabilizer provided in this invention.

[0071] like Figure 7 As shown. The difference from the aforementioned technical solution is that, in this specific embodiment, the current stabilizer 500D includes a base portion 550D and three rib portions. The base portion 550D is generally a columnar structure with two conical ends along the axial direction. Each rib portion extends radially outward from the periphery of the base portion 550D. At the same time, each rib portion extends axially from the periphery of the base portion.

[0072] The outer peripheral surface of the base portion 550D is divided by various ribs to form three guide surfaces extending axially along the base portion 550D. The profile of the cross-section of each guide surface passing through the central axis of the base portion 550D includes a straight segment 556, a first arc segment 555A, and a second arc segment 555B. The straight segment 557 is located between the first arc segment 555A and the second arc segment 555B. This technical solution also has the beneficial effects of the aforementioned technical solutions, which will not be elaborated further here.

[0073] The above are merely preferred embodiments exemplified to better illustrate the technical solution of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and all such improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A rotary valve, comprising a valve body component, a valve core component, and a drive component, wherein the valve body component comprises a valve cavity, a flow path inlet end, and a flow path outlet end; the valve core component comprises a valve core disposed in the valve cavity, the valve core having a valve core cavity, the drive component capable of driving the valve core to rotate, and the valve core controlling the opening and closing of the rotary valve. Its features are, It also includes a flow stabilizer, which is placed in the valve core cavity. The flow stabilizer includes a base portion and ribs. The base portion is generally a cylindrical structure. There are at least three ribs. Each rib extends radially outward from the periphery of the base portion. The radial outer edge of each rib engages with the inner wall of the valve core. The space between adjacent ribs forms a fluid channel. The base portion includes a guide surface located between adjacent ribs. The guide surface extends axially along the base portion. The profile of the cross section of the guide surface passing through the central axis of the base portion includes a straight segment and, or an arc segment. There are three or four ribs. In a cross section perpendicular to the axial direction of the base portion, the diameter of the largest circle connecting the outer edges of each rib is R. In a cross section perpendicular to the axial direction of the base portion, the diameter of the largest circle connecting the outlines of each guide surface is r. Along the axial direction of the base portion, r is a variable value, which is smaller towards both ends and larger towards the middle. The maximum r is defined as r1, which satisfies r1≤0.7R.

2. The rotary valve as described in claim 1, characterized in that, The profile of the cross section of the guide surface passing through the central axis of the base portion includes an arc segment.

3. The rotary valve as described in claim 2, characterized in that, The profile of the cross section of the guide surface passing through the central axis of the base portion also includes a straight line segment. The portion of the guide surface corresponding to the straight line segment is close to the inlet end of the flow path; the portion of the guide surface corresponding to the arc segment is close to the outlet end of the flow path.

4. The rotary valve as described in claim 2, characterized in that, The profile of the cross section of the guide surface passing through the central axis of the base portion also includes a straight line segment, and the arc segment includes a first arc segment and a second arc segment, with the straight line segment located between the first arc segment and the second arc segment.

5. The rotary valve as described in claim 1, characterized in that, The profile of the cross section of the guide surface passing through the central axis of the base is a straight line segment.

6. The rotary valve according to any one of claims 1-5, characterized in that, There are three or four ribs, which extend along the axial direction of the base portion; in the axial direction perpendicular to the base portion, each rib is arranged approximately symmetrically along the axis, and the thickness of the radial outer edge of each rib is less than the thickness of the radial inner edge; in the cross section perpendicular to the axial direction of the base portion, the profile of the radial side of each rib is an arc, and the arc angle W of the arc satisfies: 0°≤W≤20°.

7. The rotary valve according to any one of claims 1-5, characterized in that, In the axial direction perpendicular to the base portion, each of the rib portions also includes a plurality of through holes penetrating the thickness of the rib portion.

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