Static balance valve flow adjusting assembly and static balance valve

Abstract

The invention relates to a static balance valve flow adjusting assembly and a static balance valve.The flow adjusting assembly comprises a hand wheel, an inner sleeve and an outer sleeve, the hand wheel is cylindrical, the inner sleeve and the outer sleeve are both reducer pipes, and the pipe diameter of the upper pipe section is larger than the pipe diameter of the lower pipe section of the inner sleeve and the pipe diameter of the lower pipe section of the outer sleeve; the hand wheel coaxially sleeves the upper pipe section of the inner sleeve and is in threaded connection with the upper pipe section of the inner sleeve, the upper pipe section of the outer sleeve coaxially sleeves the lower portion of the hand wheel and is in running fit with the hand wheel, the lower pipe section of the outer sleeve coaxially sleeves the lower pipe section of the inner sleeve and is in sliding fit with the lower pipe section of the inner sleeve, and an axial positioning structure is arranged between the outer sleeve and the hand wheel. Two flow indicating structures are arranged between the inner sleeve and the outer sleeve and symmetrically distributed in the circumferential direction, and a valve rod connecting structure is arranged on the inner wall of the upper portion of the hand wheel. The static balance valve adopts a flow adjusting assembly to adjust the flow and the opening degree of the valve. Flow scales are arranged on the two sides of the static balance valve, and the KV value of the valve can be conveniently checked and accurately adjusted on any side.

Description

Technical Field

[0001] The invention relates to a static balancing valve flow regulating component and a static balancing valve using the flow regulating component, belonging to the technical field of valves. Background Art

[0002] The static balancing valve is a valve that changes the flow resistance through the valve by changing the gap (or opening) between the valve core and the valve seat to achieve the purpose of regulating the flow rate. It can distribute the new water volume in a balanced manner according to the design and calculation ratio, and the flow rates of the branches after the valve increase or decrease in proportion at the same time to achieve the purpose of thermal balance. For example, the utility model patent with the publication number CN209325061U discloses a Venturi-type balancing valve, in which a valve sealing pair composed of a valve seat and a valve core is provided in the medium flow channel in the valve body, and a pressure measuring area is provided in the medium flow channel on the outlet side of the valve sealing pair. The medium flow channel in the pressure measuring area is a straight channel, including a reduced diameter section and a non-reduced diameter section, and the reduced diameter section and the non-reduced diameter section are respectively provided with pressure detection points. The central axis of the medium flow channel of the valve sealing pair is at an angle of 45 to 60 degrees with the main axis direction of the valve body, and is inclined toward the inlet side of the valve. Since the pressure detection point of the balancing valve is set on the outlet side of the valve and the moving part of the valve is inclined toward the inlet side of the valve, the valve structure is compact, easy to install and use, and the valve flow pressure difference curve does not change due to the change of the valve opening; since the valve stem screw is set inside the valve stem, when the valve is adjusted, tightening the valve stem screw can prevent the valve from opening too much by mistake. However, the balancing valve is the same as other balancing valves in the prior art, and only a flow indicating structure is set on one side of the valve. When the valve is installed with a flow indicating structure on one side facing or close to a wall or other building structure due to the actual installation environment, the flow of the valve cannot be accurately adjusted by observing the flow indicating structure. In addition, the sealing surface of the valve core of the balancing valve and other balancing valves in the prior art are both inclined surfaces (or planes). In the process of adjusting the flow, the flow of the medium and the opening of the valve change nonlinearly, and the accuracy of the flow regulation is not high. Summary of the invention

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a static balancing valve flow regulating assembly and a static balancing valve. Flow scales are provided on both sides of the valve, so that the KV value (flow coefficient) of the valve can be easily viewed and accurately adjusted on either side.

[0004] The technical solution for achieving the above-mentioned purpose of the present invention is: a static balancing valve flow regulating assembly, including a handwheel, an inner sleeve and an outer sleeve, the handwheel is cylindrical, the inner sleeve and the outer sleeve are both reducers, and the pipe diameters (including inner diameter and outer diameter, the same below) of the upper pipe sections of the inner sleeve and the outer sleeve are both larger than the pipe diameters of their respective lower pipe sections, the inner diameter of the handwheel matches the outer diameter of the upper pipe section of the inner sleeve, the inner diameter of the upper pipe section of the outer sleeve matches the outer diameter of the lower part of the handwheel, and the inner diameter of the lower pipe section of the outer sleeve matches the outer diameter of the lower pipe section of the inner sleeve. The handwheel is coaxially sleeved outside the upper pipe section of the inner sleeve and threadedly connected, the upper pipe section of the outer sleeve is coaxially sleeved outside the lower part of the handwheel and rotationally matched (leaving a rotational matching gap), the lower pipe section of the outer sleeve is coaxially sleeved outside the lower pipe section of the inner sleeve and slidingly matched, a matching axial positioning structure is provided between the outer sleeve and the handwheel, two groups of first flow indicating structures are provided between the inner sleeve and the outer sleeve, the two groups of first flow indicating structures are symmetrically distributed along the circumferential direction, and a valve stem connecting structure suitable for connecting to the top end of the valve stem is provided on the upper inner wall of the handwheel.

[0005] Preferably, the two groups of the first flow indicating structures are as follows: two plug plates extending downward in a vertical direction (or axial direction, the same below) are provided on the outer wall of the reducing table of the inner sleeve, the two plug plates are symmetrically distributed along the circumference of the inner sleeve, a spacing is left between the plug plates and the lower pipe section of the inner sleeve, a scale indicating arrow (usually a horizontal indicating arrow) is provided on the outer plate surface of the plug plates, two plug plate holes penetrating inside and outside are provided on the reducing table of the outer sleeve, the two plug plate holes are symmetrically distributed along the circumference of the outer sleeve, the two plug plates are correspondingly inserted into the two plug plate holes and vertically slidably matched, the plug plate (referring to the outer plate surface of the plug plate) is located on the outer side of the lower pipe section of the outer sleeve, and two groups of first flow scales (or first opening scales, the same below) are provided on the outer wall of the lower pipe section of the outer sleeve, the two groups of the first flow scales correspond one-to-one to the two plug plates, and are respectively vertically arranged on one side or both sides of the corresponding plug plates.

[0006] Preferably, the bottom end of the hand wheel abuts against the diameter-changing table surface of the outer sleeve.

[0007] Preferably, two groups of second flow indicating structures are provided between the hand wheel and the outer sleeve, and the circumferential positions of the two groups of the second flow indicating structures correspond one to one to the two groups of the first flow indicating structures.

[0008] Preferably, the two groups of the second flow indicating structures are as follows: two groups of second flow scales (or second opening scales) are provided circumferentially on the lower outer wall of the handwheel, and two upper and lower openings (or scale display windows) that penetrate inside and outside are provided on the upper tube section of the outer sleeve, the two openings are symmetrically distributed along the circumference of the outer sleeve, and the two openings correspond one-to-one to the axial positions of the two groups of the second flow scales.

[0009] Furthermore, the two openings correspond to the circumferential positions of the two plug plates one by one.

[0010] Preferably, the medium flow change or valve opening change corresponding to the scale value of the first flow scale (referring to a change in one scale value) is different from the medium flow change or valve opening change corresponding to the scale value of the second flow scale (referring to a change in one scale value).

[0011] Furthermore, the medium flow rate change or opening change corresponding to the scale value of the second flow scale is 1 / 10 of the medium flow rate change or opening change corresponding to the scale value of the first flow scale.

[0012] Preferably, the axial positioning structure is as follows: the top end of the outer sleeve is symmetrically provided with two arc-shaped flanges protruding radially inward along the circumferential direction, or the top end of the outer sleeve is provided with an annular flange protruding radially inward, and the outer wall of the handwheel is provided with an annular groove matching the arc-shaped flange or the annular flange, and the arc-shaped flange or the annular flange is inserted into the annular groove and rotated to match.

[0013] When the top of the outer sleeve is symmetrically provided with two radially inwardly protruding arc flanges along the circumferential direction, vertical notches penetrating inside and outside are respectively provided on both sides of the arc flanges on the tube wall of the upper tube section of the outer sleeve (referring to both sides along the circumferential direction of the outer sleeve).

[0014] Preferably, the valve stem connection structure is as follows: an annular boss protruding radially inward is provided on the upper inner wall of the handwheel, a valve stem sleeve extending vertically downward is coaxially provided on the annular boss, and a spline (internal spline) suitable for connecting to the top of the valve stem is provided on the inner wall of the valve stem sleeve.

[0015] The inner diameter of the annular boss (referring to the inner edge diameter of the annular boss) is usually smaller than the inner diameter of the valve stem sleeve.

[0016] Preferably, a top cover is provided at the top of the hand wheel, and a matching plug-in structure is provided between the top cover and the annular boss.

[0017] Furthermore, the plug-in structure includes two plug rods (usually cylindrical) vertically extending downwardly arranged on the bottom surface of the top cover and two plug rod sleeves vertically extending upwardly arranged on the top surface of the annular boss, the height of the plug rod sleeve is smaller than the distance between the top surface of the annular boss and the top end of the hand wheel, the plug rod sleeve is conformal to the plug rod (the inner diameter of the plug rod sleeve matches the outer diameter of the plug rod), and the setting positions of the two plug rod sleeves on the annular boss correspond one by one to the setting positions of the two plug rods on the top cover, and a vertical baffle extending radially outward is provided on the outer wall surface of the plug rod, the height of the baffle is smaller than the height of the plug rod, and the top end of the baffle is connected to the bottom surface of the top cover, and when the top cover is buckled on the top end of the hand wheel and the two plug rods are vertically inserted into the corresponding plug rod sleeves, the bottom end of the baffle rests on the top surface of the plug rod sleeve.

[0018] Preferably, the axes of the two insertion rods and a diameter of the top cover are in the same vertical plane, and the two insertion rods are symmetrically distributed on the top cover, that is, the two insertion rods are symmetrically distributed on the top cover along a diameter thereof. Correspondingly, the axes of the two insertion rod sleeves and a diameter of the annular boss are in the same vertical plane, and the two insertion rod sleeves are symmetrically distributed on the annular boss, that is, the two insertion rod sleeves are symmetrically distributed on the annular boss along a diameter thereof.

[0019] Preferably, the number of the baffles provided on the insertion rod is two, and the two baffles are symmetrically distributed on the insertion rod (provided on both sides of the insertion rod).

[0020] Preferably, a supporting protrusion extending vertically upward is provided on the outer edge of the top surface of the annular boss, and the height of the supporting protrusion is the same as the height of the insert rod sleeve. The number of the supporting protrusions is several, and the several supporting protrusions are evenly distributed along the circumference of the annular boss. The outer edge of the top cover is provided with an annular folding edge extending vertically downward, and the height of the annular folding edge is the same as the height of the baffle. When the top cover is buckled on the top end of the handwheel, the bottom surface of the annular folding edge abuts against the top surface of the supporting protrusion.

[0021] Preferably, a vertical guide rail protruding radially inward is provided on the inner wall of the lower tube section of the inner sleeve.

[0022] Furthermore, the number of the vertical guide rails is two, and the two vertical guide rails are symmetrically distributed along the circumference of the inner sleeve.

[0023] Furthermore, the two vertical guide rails and the two plug plates are evenly distributed along the circumference of the lower tube section of the inner sleeve, that is, the plane where the vertical center lines of the two vertical guide rails are located is perpendicular to the plane where the vertical center lines of the two plug plates are located, and the adjacent vertical guide rails and the plug plates are deflected 90° in the circumference of the lower tube section of the inner sleeve.

[0024] A static balancing valve comprises a valve body, a valve cover is connected to the valve body, a valve sealing pair consisting of a valve seat and a valve core is arranged in a medium flow channel between a medium inlet and a medium outlet of the valve body, a tubular valve core connecting piece is fixedly connected to the top end of the valve core, the valve cover is a tubular with a variable diameter, and the diameter of the upper pipe section is smaller than the diameter of the lower pipe section, a valve stem is coaxially arranged in the valve cover, the valve stem and the upper pipe section of the valve cover are rotationally matched, the outer diameter of the valve stem is matched with the inner diameter of the valve core connecting piece and is threadedly connected, the valve core connecting piece and the lower pipe section of the valve cover are vertically slidably matched and an axial guide structure is arranged, the top end of the valve stem is located outside the valve cover, a flow regulating assembly is arranged, and the flow regulating assembly adopts any one of the flow regulating assemblies of the static balancing valve disclosed in the present invention, the top end of the valve stem is connected to the hand wheel through the valve stem connecting structure, and the inner sleeve is coaxially sleeved outside the upper pipe section of the valve cover and slidably matched.

[0025] Preferably, the two groups of the first flow indicating structures are respectively arranged on the front and back of the valve, and correspondingly, the two openings are respectively arranged on the front and back of the valve.

[0026] Preferably, the valve core is in an inverted cone shape, the bottom tip of the valve core is in an arc curved surface shape, and the valve seat is inclined from top to bottom in a direction from the medium inlet to the medium outlet.

[0027] Preferably, the axial guiding structure between the valve core connector and the lower pipe section of the valve cover is as follows: the valve core connector is in the shape of a hexagonal prism, the cross-section of the inner wall of the lower pipe section of the valve cover is a regular hexagon, and is conformal to the cross-section of the outer wall of the valve core connector, and the lower pipe section of the valve cover is sleeved outside the valve core connector.

[0028] Preferably, the outer diameter of the valve stem matches the inner diameter of the valve stem sleeve, a spline (external spline) is provided on the outer wall at the top end of the valve stem, the valve stem and the valve stem sleeve are splined, the valve stem is hollow (provided with an axial hole), and an internal thread is provided on the inner wall of the upper part (the inner wall of the lower part is smooth), the top end of the valve stem abuts on the bottom surface of the annular boss between the valve stem sleeve and the inner edge of the annular boss, a bolt-shaped handwheel pressure cap is screwed on the top end of the valve stem, the handwheel pressure cap passes through the middle hole of the annular boss from the top of the annular boss downward and is screwed on the top end of the valve stem, and the bottom wall of the handwheel pressure cap abuts on the top wall of the annular boss.

[0029] Preferably, a radially outwardly extending annular flange is provided in the middle of the valve stem, and the annular flange abuts against the reducing surface of the valve cover from bottom to top, and the reducing surface of the valve cover may be provided with a step surface matching with the annular flange.

[0030] Preferably, a positioning column is coaxially provided in the axial hole of the valve stem, and the positioning column is vertically slidably matched with the valve stem. The bottom end of the positioning column extends downward from the valve stem and is connected to or abuts against the bottom wall in the valve core connector. A plug is screwed on the upper part of the valve stem, and the plug is located above the positioning column. A hexagonal hole is provided on the top surface of the plug.

[0031] Preferably, a vertical guide rail groove matching with the vertical guide rail is provided on the outer wall of the upper pipe section of the valve cover, and the vertical guide rail is located in the vertical guide rail groove and slidably matched with the vertical guide rail.

[0032] Preferably, the valve body is provided with two detection holes, the two detection holes are respectively connected with the medium flow channel on the medium inlet side and the medium flow channel on the medium outlet side of the valve body, and the two detection holes are respectively provided with pressure detection devices.

[0033] The spacing between each of the first flow scales and each of the second flow scales can be appropriately set according to the prior art to correspond to the change in medium flow or opening of the valve adjusted by rotating the hand wheel by a corresponding angle or number of turns.

[0034] The beneficial effects of the present invention are: (1) Since the flow indicator structure is provided on both the front and back of the valve, the KV value of the valve can be easily viewed and accurately adjusted on either side of the valve. This can effectively solve the problem that the flow of the valve cannot be accurately adjusted by observing the flow indicator structure when the side with the flow indicator structure faces or is close to a wall or other building structure after installation due to the actual installation environment of the traditional balancing valve; (2) Due to the setting of the first flow indicating structure and the second flow indicating structure, and the different flow scale units of the two flow indicating structures (the flow scale unit of the second flow indicating structure is 1 / 10 of the flow scale unit of the first flow indicating structure), the valve can be adjusted based on different flow or opening units according to actual control needs, thereby effectively improving the adjustment accuracy of the flow and opening of the valve; (3) Due to the unique shape design of the valve core, during the opening and closing of the valve and the flow regulation process, the flow surface between the valve core and the valve seat is a gradually changing annular surface. Compared with the traditional balancing valve that adjusts the medium flow and valve opening by changing the distance between the valve core and the valve seat, the change curve of the medium flow and valve opening is closer to the linear curve of y=kx, which helps to improve the regulation accuracy of the valve flow and opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a cross-sectional view of an embodiment of the static balancing valve flow regulating assembly of the present invention; Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the inner sleeve in an embodiment; Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the outer sleeve in the embodiment; Figure 4 yes Figure 1 A schematic diagram of the three-dimensional structure of the hand wheel in the embodiment; Figure 5 yes Figure 1 A schematic diagram of the three-dimensional structure of the top cover in the embodiment; Figure 6 It is a cross-sectional view of an embodiment of the static balancing valve of the present invention. DETAILED DESCRIPTION

[0036] All directional indications (such as up, down, top, bottom, inside, outside, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings), and do not constitute a limitation on the actual use direction. If the specific posture changes, the directional indication will also change accordingly.

[0037] See also Figure 1-Figure 5The present invention discloses a static balancing valve flow regulating assembly, comprising a handwheel 1, an inner sleeve 2 and an outer sleeve 3, wherein the handwheel is cylindrical, the inner sleeve and the outer sleeve are both reducer tubes, and the pipe diameters (including inner diameter and outer diameter, the same below) of the upper pipe sections of the inner sleeve and the outer sleeve are both larger than the pipe diameters of their respective lower pipe sections, and reducer surfaces are provided inside the pipes, the inner diameter of the handwheel matches the outer diameter of the upper pipe section of the inner sleeve, the inner diameter of the upper pipe section of the outer sleeve matches the outer diameter of the lower part of the handwheel, and the inner diameter of the lower pipe section of the outer sleeve matches the outer diameter of the lower pipe section of the inner sleeve. The handwheel is coaxially sleeved outside the upper pipe section of the inner sleeve, the inner wall of the handwheel is provided with an internal thread, the outer wall of the upper pipe section of the inner sleeve is provided with an external thread matching the internal thread, the handwheel is threadedly connected with the upper pipe section of the inner sleeve, and the lower pipe section of the inner sleeve extends downward from the bottom end of the handwheel. The upper pipe section of the outer sleeve is coaxially sleeved outside the lower part of the handwheel, the upper pipe section of the outer sleeve and the lower part of the handwheel are rotationally matched, and the two can rotate relative to each other, leaving a rotational matching gap. The lower pipe section of the outer sleeve is coaxially sleeved outside the lower pipe section of the inner sleeve, the lower pipe section of the outer sleeve and the lower pipe section of the inner sleeve are vertically slidably matched (or axially slidably matched, the same below), and the two can slide relative to each other vertically. The bottom end of the handwheel is against the diameter reducing table of the outer sleeve. A matching axial positioning structure is provided between the outer sleeve and the handwheel, so that the two can only rotate relative to each other but cannot move relative to each other axially. Two groups of first flow indicating structures are arranged between the inner sleeve and the outer sleeve, and the two groups of the first flow indicating structures are symmetrically distributed along the circumferential direction. When the static balancing valve flow regulating assembly is installed on the main structure of the static balancing valve, the two groups of the first flow indicating structures are preferably located on the front side and the back side of the static balancing valve, respectively. A valve stem connecting structure suitable for connecting with the top end of the valve stem is arranged on the upper inner wall of the hand wheel, so that when the hand wheel is turned, the valve stem can be driven to rotate synchronously, thereby adjusting the flow and opening of the valve.

[0038] A preferred implementation of the two groups of the first flow indicating structures is as follows: two plug-in plates 4 extending downward in a vertical direction (or axial direction, the same below) are provided on the outer wall of the reducing table of the inner sleeve, and the plug-in plates are preferably long flat plates, and the two plug-in plates are symmetrically distributed along the circumference of the inner sleeve, and a spacing is left between the plug-in plates and the lower pipe section of the inner sleeve, and a scale indicating arrow (usually a horizontal indicating arrow) is provided on the outer plate surface of the plug-in plates, and two plug-in plate holes 5 penetrating inside and outside are provided on the reducing table of the outer sleeve, and the two The plug-in holes are symmetrically distributed along the circumference of the outer sleeve, and the two plug-ins are inserted into the two plug-in holes one by one. The plug-ins are vertically slidably matched with the plug-in holes. The plug-in (referring to the outer plate surface of the plug-in) is located on the outer side of the lower pipe section of the outer sleeve, which is convenient for vertical movement. Two groups of first flow scales (or first opening scales, the same below) are provided on the outer wall of the lower pipe section of the outer sleeve. The two groups of the first flow scales correspond to the two plug-ins one by one and are vertically arranged on one side or both sides of the corresponding plug-ins. In this way, when the hand wheel is turned to adjust the flow and opening of the valve, the inner sleeve and the plug-in thereon move correspondingly in the vertical direction, and the scale indicator arrow on the plug-in points to the corresponding first flow scale on the outer sleeve, which intuitively displays the flow and opening of the valve.

[0039] The outer wall of the lower pipe section of the outer sleeve may be provided with two vertical grooves 6 conforming to the plug plate, and the two vertical grooves are respectively located below the two plug plate holes. With such a configuration, when the plug plate is inserted into the plug plate hole, the main body of the plug plate is located in the vertical grooves, and the outer plate surface is flush with or lower than the outer wall surface of the lower pipe section of the outer sleeve, making the appearance of the flow regulating assembly after assembly more beautiful, smooth and easy to operate.

[0040] The scale indicating arrow and the first flow scale may be engraved on the corresponding pipe fitting, or may be printed or pasted on the corresponding pipe fitting.

[0041] Two groups of second flow indicating structures are preferably provided between the handwheel and the outer sleeve, and the circumferential positions of the two groups of the second flow indicating structures correspond one to one to the two groups of the first flow indicating structures, that is, when the static balancing valve flow regulating assembly is installed on the main structure of the static balancing valve, the two groups of the second flow indicating structures are preferably located on the front side and the back side of the static balancing valve, respectively.

[0042] A preferred implementation of the two sets of the second flow indicating structures is as follows: the lower outer wall of the hand wheel is provided with two sets of second flow scales (or second opening scales) along the circumferential direction, and the upper pipe section of the outer sleeve is provided with two openings (or scale display windows) 7 that penetrate inside and outside, and the two openings are symmetrically distributed along the circumference of the outer sleeve, and the two openings correspond to the axial positions of the two sets of the second flow scales one by one, and the two openings correspond to the circumferential positions of the two plug plates one by one, so that the two sets of the second flow scales can be displayed from the two openings respectively. The two sets of the second flow scales are staggered 180° in the circumferential direction, so that when the static balancing valve flow regulating assembly is installed on the main structure of the static balancing valve, the values ​​of the second flow scales displayed on the front and back sides of the valve are the same.

[0043] Since the front and back of the valve are provided with flow indicating structures, the KV value of the valve can be conveniently viewed and accurately adjusted on either side of the valve, which can effectively solve the problem that the flow of the traditional balancing valve cannot be accurately adjusted by observing the flow indicating structure when the side with the flow indicating structure faces or is close to a wall or other building structure after installation due to the actual installation environment.

[0044] When the static balancing valve flow regulating assembly is installed on the main structure of the static balancing valve, the medium flow change or valve opening change corresponding to the scale value of the first flow scale (referring to the change of one scale value) is preferably different from the medium flow change or valve opening change corresponding to the scale value of the second flow scale (referring to the change of one scale value). The medium flow change or opening change corresponding to the scale value of the second flow scale is preferably 1 / 10 of the medium flow change or opening change corresponding to the scale value of the first flow scale. For example, the scale value of the first flow scale (referring to the change of one scale value) refers to the flow change or opening change of 1 unit of the valve, and the scale value of the second flow scale (referring to the change of one scale value) refers to the flow change or opening change of 0.1 unit of the valve. Such a setting allows the valve to be adjusted based on different flow or opening units according to actual control needs, which can effectively improve the adjustment accuracy of the valve flow and opening.

[0045] A preferred implementation of the axial positioning structure between the outer sleeve and the hand wheel is: the top of the outer sleeve is symmetrically provided with two arc-shaped flanges 8 protruding radially inward along the circumferential direction, or the top of the outer sleeve is provided with an annular flange protruding radially inward, and the outer wall of the hand wheel is provided with an annular groove matching with the arc-shaped flange or the annular flange, and the arc-shaped flange or the annular flange is inserted into the annular groove and rotates in cooperation. Since the plug plate on the inner sleeve is vertically inserted into the plug plate hole on the outer sleeve, the outer sleeve is positioned in the circumferential direction, and when the hand wheel is turned, the outer sleeve will not rotate with the hand wheel.

[0046] When the top end of the outer sleeve is symmetrically provided with two radially inwardly protruding arc flanges along the circumferential direction, vertical notches 9 penetrating inside and outside are respectively provided on both sides of the arc flange on the tube wall of the upper tube section of the outer sleeve (referring to the two sides along the circumferential direction of the outer sleeve), so that the arc flange has a certain deformation ability in the radial direction of the outer sleeve, which is convenient for installation with the hand wheel.

[0047] The valve stem connection structure arranged on the handwheel is preferably: an annular boss 10 protruding radially inward is provided on the upper inner wall of the handwheel, a valve stem sleeve 11 extending vertically downward is coaxially provided on the annular boss, the inner diameter of the annular boss (referring to the inner edge diameter of the annular boss) is usually smaller than the inner diameter of the valve stem sleeve, and a spline (internal spline) 12 suitable for connecting with the top end of the valve stem is provided on the inner wall of the valve stem sleeve. With such arrangement, when the static balancing valve flow regulating assembly is installed on the main structure of the static balancing valve, the handwheel is connected to the valve stem spline so that the two can rotate synchronously, so that the indication result of the flow indicating structure corresponds to the flow and opening changes of the valve.

[0048] The top of the handwheel is preferably provided with a top cover 13 to seal the top of the handwheel and play a role in dust and water prevention. A matching plug-in structure is provided between the top cover and the annular boss to facilitate assembly and disassembly. The plug-in structure preferably includes two plug rods (usually cylindrical) 14 extending vertically downward and arranged on the bottom surface of the top cover, and two plug rod sleeves 15 extending vertically upward and arranged on the top surface of the annular boss. The height of the plug rod sleeve is smaller than the distance between the top surface of the annular boss and the top of the handwheel. The plug rod sleeve is conformal to the plug rod (the inner diameter of the plug rod sleeve matches the outer diameter of the plug rod). The setting positions of the two plug rod sleeves on the annular boss are one-to-one with the setting positions of the two plug rods on the top cover. The top end of the baffle is connected to the bottom surface of the top cover; when the top cover is buckled on the top end of the handwheel and the two plug rods are vertically inserted into the corresponding plug rod sleeves, the bottom end of the baffle rests on the top surface of the plug rod sleeve to achieve axial positioning of the top cover.

[0049] The axes of the two insertion rods are preferably in the same vertical plane as a diameter of the top cover, and the two insertion rods are symmetrically distributed on the top cover, that is, the two insertion rods are symmetrically distributed on the top cover along a diameter thereof. Correspondingly, the axes of the two insertion rod sleeves are in the same vertical plane as a diameter of the annular boss, and the two insertion rod sleeves are symmetrically distributed on the annular boss, that is, the two insertion rod sleeves are symmetrically distributed on the annular boss along a diameter thereof.

[0050] The number of the baffles provided on the insertion rod can be two, and the two baffles are symmetrically distributed on the insertion rod (provided on both sides of the insertion rod). With such an arrangement, when the top cover is buckled onto the top of the hand wheel and the bottom end of the baffle is against the top surface of the insertion rod sleeve, the insertion rod is subjected to uniform force and is not easily deformed or damaged.

[0051] The outer edge of the top surface of the annular boss is preferably provided with a supporting protrusion extending vertically upward, the height of the supporting protrusion is the same as the height of the insert rod sleeve, the number of the supporting protrusions is several (for example, two or three), and the several supporting protrusions are evenly distributed along the circumference of the annular boss, and the outer edge of the top cover is provided with an annular folding edge extending vertically downward, the height of the annular folding edge is the same as the height of the baffle, when the top cover is buckled onto the top end of the hand wheel, the bottom surface of the annular folding edge abuts against the top surface of the supporting protrusion, further ensuring the axial positioning of the top cover.

[0052] A vertical guide rail 16 protruding radially inward is preferably provided on the inner wall of the lower pipe section of the inner sleeve. When the static balancing valve flow regulating assembly is installed on the main structure of the static balancing valve, the vertical guide rail slides with the matching parts to play a guiding and circumferential limiting role, so that when the hand wheel is turned, under the action of the threaded connection between the hand wheel and the upper pipe section of the inner sleeve, the inner sleeve can only move vertically without rotating with the hand wheel.

[0053] The number of the vertical guide rails may be two, and the two vertical guide rails are symmetrically distributed along the circumference of the inner sleeve.

[0054] The two vertical guide rails and the two plug plates are evenly distributed along the circumference of the lower pipe section of the inner sleeve, that is, the plane where the vertical midlines of the two vertical guide rails are located is perpendicular to the plane where the vertical midlines of the two plug plates are located, and the adjacent vertical guide rails and the plug plates are arranged 90° deflected in the circumference of the lower pipe section of the inner sleeve. When the hand wheel is turned, the inner sleeve and the outer sleeve are more securely positioned relative to the circumference of the hand wheel and the force is more evenly applied.

[0055] See also Figure 6 The present invention further discloses a static balancing valve, comprising a valve body 17, a valve cover 18 is connected to the valve body, a valve sealing pair consisting of a valve seat and a valve core 21 is arranged in a medium flow channel between a medium inlet 19 and a medium outlet 20 of the valve body, a tubular valve core connector (which can be connected by bolts, the valve core connector is provided with a bottom wall, the bottom wall of the valve core connector and the valve core are provided with screw holes matched with the bolts) 22 is fixedly connected to the top of the valve core, the valve cover is a variable diameter tubular shape, and the diameter of the upper pipe section is smaller than the diameter of the lower pipe section, a valve stem 23 is coaxially arranged in the valve cover, the valve stem is rotatably matched with the upper pipe section of the valve cover, the bottom end of the valve stem extends downward into the lower pipe section of the valve cover, the outer diameter of the valve stem is matched with the inner diameter of the valve core connector, the lower part of the valve stem is provided with an external thread, The inner wall of the valve core connecting piece is provided with an internal thread matching the external thread, the valve stem is threadedly connected to the valve core connecting piece, the valve core connecting piece and the lower pipe section of the valve cover are vertically slidably matched and are provided with an axial guide structure, so that the valve core connecting piece can move vertically relative to the lower pipe section of the valve cover (without relative rotation), the top end of the valve stem is located outside the valve cover, and is provided with a flow regulating assembly, the flow regulating assembly adopts any one of the flow regulating assemblies of the static balancing valve disclosed in the present invention, the top end of the valve stem is connected to the hand wheel through the valve stem connecting structure, so that when the hand wheel is rotated, the valve stem can rotate synchronously with the hand wheel, the inner sleeve is coaxially sleeved outside the upper pipe section of the valve cover and slidably matched, so that the inner sleeve can move vertically relative to the upper pipe section of the valve cover.

[0056] By rotating the hand wheel, the valve stem can be driven to rotate synchronously, and the valve core connecting piece can drive the valve core to move vertically accordingly, so as to realize the flow and opening adjustment of the valve (including the opening and closing of the valve), and the specific flow and opening values ​​are displayed by the first flow indicating structure and the second flow indicating structure.

[0057] The two groups of the first flow indicating structures are preferably respectively arranged on the front and back of the valve for easy observation. Correspondingly, the two openings are respectively arranged on the front and back of the valve.

[0058] The spacing between each of the first flow scales and each of the second flow scales can be appropriately set according to the prior art to correspond to the change in medium flow or opening of the valve adjusted by rotating the hand wheel by a corresponding angle or number of turns.

[0059] The valve core is preferably in an inverted cone shape, the bottom tip of the valve core is in an arc shape, the valve seat is inclined from top to bottom in the direction from the medium inlet to the medium outlet, and the valve stem is perpendicular to the sealing surface of the valve seat. In this way, during the opening and closing of the valve and the flow rate adjustment process, the flow surface between the valve core and the valve seat is a gradually changing annular surface. Compared with the traditional balancing valve that adjusts the medium flow rate and valve opening by changing the distance between the valve core and the valve seat, the change curve of the medium flow rate and valve opening is closer to the linear curve of y=kx, which helps to improve the adjustment accuracy of the flow rate and opening of the valve.

[0060] A preferred implementation of the axial guide structure between the valve core connector and the lower pipe section of the valve cover is as follows: the valve core connector is in the shape of a hexagonal prism, the cross-section of the inner wall of the lower pipe section of the valve cover is a regular hexagon, and is conformal to the cross-section of the outer wall of the valve core connector, the lower pipe section of the valve cover is sleeved outside the valve core connector, and the guidance and circumferential positioning of the valve core connector and the lower pipe section of the valve cover during vertical movement are achieved through the hexagonal contact surface.

[0061] The outer diameter of the valve stem is preferably matched with the inner diameter of the valve stem sleeve, and a spline (external spline) is provided on the outer wall of the top end of the valve stem. The valve stem and the valve stem sleeve are spline-connected to realize the synchronous rotation between the handwheel and the valve stem. The valve stem is hollow (provided with an axial hole), and an internal thread is provided on the inner wall of the upper part (the inner wall of the lower part is smooth). The top end of the valve stem is against the bottom surface of the annular boss between the valve stem sleeve and the inner edge of the annular boss. The top end of the valve stem is screwed with a bolt-shaped handwheel pressing cap 24. The handwheel pressing cap passes through the middle hole of the annular boss from the top of the annular boss and is screwed on the top end of the valve stem. The bottom wall of the handwheel pressing cap is against the top wall of the annular boss to realize the axial fixed connection between the handwheel and the valve stem. When the handwheel is turned, the valve stem rotates synchronously with the handwheel without axial movement.

[0062] The middle part of the valve stem is preferably provided with an annular flange extending radially outward, and the annular flange abuts against the reducing surface of the valve cover from bottom to top. The reducing surface of the valve cover can be provided with a step surface matching the annular flange to further ensure the axial positioning of the valve stem in the valve.

[0063] A positioning column 25 is preferably coaxially provided in the axial hole of the valve stem. The positioning column is located in the lower part of the axial hole of the valve stem and vertically slides with the valve stem. The bottom end of the positioning column extends downward from the valve stem and is connected to or abuts against the bottom wall in the valve core connector. A plug 26 is screwed on the upper part of the valve stem. The plug is located above the positioning column, and a hexagonal hole is provided on the top surface of the plug. With such an arrangement, the plug can be moved to a suitable position in the valve stem by a suitable wrench (such as an external hexagonal wrench) to limit the maximum distance that the positioning column can move vertically upward, thereby limiting the maximum distance that the valve core and the valve core connector can move vertically upward, and preventing the valve from opening too wide by mistake. The handwheel pressure cap is preferably provided with an axial hole, so that after opening the top cover, the wrench can be directly extended upward and downward into the valve stem to adjust the position of the plug.

[0064] A vertical guide rail groove cooperating with the vertical guide rail is preferably provided on the outer wall of the upper pipe section of the valve cover. The vertical guide rail is located in the vertical guide rail groove and slidably cooperates with it, which not only plays a vertical guiding role for the inner sleeve, but also plays a circumferential limiting role for the inner sleeve.

[0065] The valve body is preferably provided with two detection holes, which are respectively connected to the medium flow channel on the medium inlet side and the medium flow channel on the medium outlet side of the valve body, and the two detection holes are respectively provided with pressure detection devices (such as pressure detection rods) to facilitate the detection of the medium pressure in the medium flow channel on the medium inlet side and the medium flow channel on the medium outlet side of the valve.

[0066] Suitable sealing members, such as sealing rings, may be provided between the connecting parts of the static balancing valve to achieve a sealing effect.

[0067] The main working process of the static balancing valve when used is: turning the handwheel, the handwheel drives the valve stem to rotate synchronously, since the valve core connector is threadedly connected to the valve stem and an axial guide structure is provided between the valve core connector and the lower pipe section of the valve cover, when the valve stem rotates, the valve core connector drives the valve core to perform corresponding vertical movement to achieve flow and opening adjustment of the valve, while the handwheel rotates, the inner sleeve and the plug thereon perform corresponding vertical movement relative to the handwheel and the outer sleeve, and the flow and opening of the valve are displayed by the first flow indicating structure and the second flow indicating structure.

[0068] Any static balancing valve flow regulating assembly of the present invention can be used for any static balancing valve of the present invention.

[0069] Any static balancing valve of the present invention may also adopt any static balancing valve flow regulating assembly of the present invention.

[0070] Unless otherwise specified or one preferred or optional technical means is a further limitation of another technical means, all preferred and optional technical means disclosed in the present invention can be arbitrarily combined to form several different technical solutions.

Claims

1. Static balancing valve flow control assembly, characterized in that The invention comprises a hand wheel, an inner sleeve and an outer sleeve, wherein the hand wheel is cylindrical, the inner sleeve and the outer sleeve are both reducers, and the diameters of the upper pipe sections of the inner sleeve and the outer sleeve are larger than the diameters of their respective lower pipe sections, the inner diameter of the hand wheel matches the outer diameter of the upper pipe section of the inner sleeve, the inner diameter of the upper pipe section of the outer sleeve matches the outer diameter of the lower part of the hand wheel, the inner diameter of the lower pipe section of the outer sleeve matches the outer diameter of the lower pipe section of the inner sleeve, and the hand wheel is coaxially sleeved on the upper part of the inner sleeve The outer tube section is coaxially sleeved on the outside of the lower part of the handwheel and is threadedly connected, the upper tube section of the outer sleeve is coaxially sleeved on the outside of the lower part of the handwheel and rotatably matched, the lower tube section of the outer sleeve is coaxially sleeved on the outside of the lower tube section of the inner sleeve and slidably matched, a matching axial positioning structure is provided between the outer sleeve and the handwheel, two groups of first flow indicating structures are provided between the inner sleeve and the outer sleeve, the two groups of first flow indicating structures are symmetrically distributed along the circumferential direction, and a valve stem connecting structure suitable for connecting with the top end of the valve stem is provided on the upper inner wall of the handwheel.

2. The static balancing valve flow regulating assembly according to claim 1, characterized in that The two groups of the first flow indicating structures are as follows: two plug-ins extending vertically downward are provided on the outer wall of the reducing table of the inner sleeve, the two plug-ins are symmetrically distributed along the circumference of the inner sleeve, a spacing is left between the plug-ins and the lower pipe section of the inner sleeve, a scale indicating arrow is provided on the outer plate surface of the plug-ins, two plug-in holes penetrating inside and outside are provided on the reducing table of the outer sleeve, the two plug-in holes are symmetrically distributed along the circumference of the outer sleeve, the two plug-ins are correspondingly inserted into the two plug-in holes and vertically slidably matched, the plug-ins are located on the outer side of the lower pipe section of the outer sleeve, and two groups of first flow scales are provided on the outer wall of the lower pipe section of the outer sleeve, the two groups of the first flow scales correspond one-to-one to the two plug-ins, and are respectively vertically arranged on one side or both sides of the corresponding plug-ins.

3. The static balancing valve flow regulating assembly according to claim 1, characterized in that Two groups of second flow indicating structures are provided between the hand wheel and the outer sleeve, and the circumferential positions of the two groups of the second flow indicating structures correspond one to one to the circumferential positions of the two groups of the first flow indicating structures.

4. The static balancing valve flow regulating assembly according to claim 3, characterized in that The two groups of the second flow indicating structures are as follows: two groups of upper and lower second flow scales are provided circumferentially on the lower outer wall of the hand wheel, and two upper and lower openings penetrating inside and outside are provided on the upper pipe section of the outer sleeve, and the two openings are symmetrically distributed along the circumference of the outer sleeve, and the two openings correspond one-to-one to the axial positions of the two groups of the second flow scales.

5. The static balancing valve flow regulating assembly according to claim 1, characterized in that The axial positioning structure is as follows: the top end of the outer sleeve is symmetrically provided with two arc-shaped flanges protruding radially inward along the circumferential direction, or the top end of the outer sleeve is provided with an annular flange protruding radially inward, and the outer wall of the hand wheel is provided with an annular groove matching with the arc-shaped flange or the annular flange, and the arc-shaped flange or the annular flange is inserted into the annular groove and rotated to match.

6. The static balancing valve flow regulating assembly according to claim 1, characterized in that The valve stem connection structure is as follows: an annular boss protruding radially inward is provided on the upper inner wall of the hand wheel, a valve stem sleeve extending vertically downward is coaxially provided on the annular boss, and a spline suitable for connecting with the top end of the valve stem is provided on the inner wall of the valve stem sleeve.

7. The static balancing valve flow regulating assembly according to claim 6, characterized in that A top cover is provided at the top of the hand wheel, and a matching plug-in structure is provided between the top cover and the annular boss.

8. The static balancing valve flow regulating assembly according to claim 1, characterized in that A vertical guide rail protruding radially inwards is arranged on the inner wall of the lower pipe section of the inner sleeve.

9. A static balancing valve, comprising a valve body, a valve cover connected to the valve body, a valve sealing pair consisting of a valve seat and a valve core arranged in a medium flow channel between a medium inlet and a medium outlet of the valve body, characterized in that The top end of the valve core is fixedly connected with a tubular valve core connecting piece, the valve cover is a variable diameter tubular and the diameter of the upper pipe section is smaller than the diameter of the lower pipe section, a valve stem is coaxially arranged in the valve cover, the valve stem and the upper pipe section of the valve cover are rotatably matched, the outer diameter of the valve stem is matched with the inner diameter of the valve core connecting piece and are threadedly connected, the valve core connecting piece and the lower pipe section of the valve cover are vertically slidably matched and an axial guide structure is provided, the top end of the valve stem is located outside the valve cover and is provided with a flow regulating assembly, the flow regulating assembly adopts the flow regulating assembly of the static balancing valve described in any one of claims 1-8, the top end of the valve stem is connected to the handwheel through the valve stem connecting structure, and the inner sleeve is coaxially sleeved outside the upper pipe section of the valve cover and slidably matched.

10. The static balancing valve according to claim 9, characterized in that The valve core is in an inverted cone shape, the bottom tip of the valve core is in an arc curved surface shape, and the valve seat is arranged to be inclined from top to bottom in a direction from the medium inlet to the medium outlet.

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