A sleeve valve with a flapper core assembly and a method of adjusting the opening

Abstract

The application discloses a baffle sleeve control valve spool assembly and opening degree adjusting method, and belongs to the technical field of control valves.The structure is composed of a sleeve, a baffle, a sliding block, a connecting rod and a sealing sheet.The sleeve is in a hollow cylindrical structure, and a plurality of throttling windows for passing fluid are arranged on the side wall of the sleeve at intervals.An arc-shaped guide rail is formed on the top wall of the sleeve, and an annular groove for placing the sealing sheet is formed in the top wall.The connecting rod passes through the arc-shaped guide rail and the through hole on the sealing sheet placed in the annular groove in sequence, the top of the connecting rod is fixed with the sliding block, the bottom of the connecting rod is fixed with the baffle, and the connecting rod is in sliding connection in the arc-shaped guide rail.The area of the throttling windows covered by the baffle on the sleeve can be adjusted by moving the sliding block to drive the baffle to move.In the process of moving the sliding block, the sealing sheet can prevent the leakage of fluid in the valve.The structure can shield the throttling windows of the sleeve valve at different degrees at different heights, so that the opening degree of the sleeve control valve can be more flexibly adjusted.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of control valves, and particularly relates to a baffle type sleeve control valve spool assembly and opening degree adjusting method. BACKGROUND

[0002] A control valve is a component that ensures that the pressure, temperature, speed, flow rate and other parameters of fluid after the valve are within the specified range of working conditions by adjusting the opening degree of the valve core through an actuator or manually. Control valves include ball valves, butterfly valves, gate valves, stop valves and sleeve control valves. With the increasing demand of industrial applications, the demand for control valves with high pressure regulation accuracy is increasingly urgent in the nuclear power, chemical industry and military industry.

[0003] A sleeve control valve is a common type of control valve widely used in various industrial process control systems. The working principle of the sleeve control valve is to control the passage area of fluid through the valve by changing the position of the sleeve to regulate the flow. The sleeve usually has multiple holes or grooves, and when the sleeve moves, the opening area of these holes or grooves changes, thereby changing the flow of fluid. However, the current sleeve control valve has insufficient flexibility in opening degree adjustment, making it difficult to meet the working condition requirements of high pressure regulation accuracy.

[0004] Therefore, it is an important research direction in the field of fluid control to construct a sleeve control valve spool that can flexibly adjust the opening degree and propose its application method to provide a solution for industrial control valves with high pressure regulation accuracy. SUMMARY

[0005] The purpose of the present application is to solve the problems in the prior art and provide a baffle type sleeve control valve spool assembly and opening degree adjusting method. The present application can change the throttling area of the control valve by manually adjusting the position of the slider on the sleeve without changing the structure of the control valve body.

[0006] The specific technical solutions adopted by the present application are as follows:

[0007] In a first aspect, the present application provides a baffle type sleeve control valve spool assembly, which comprises a slider, a connecting rod, a sealing sheet, a sleeve and a baffle. The sleeve is in a hollow cylindrical structure, and a plurality of throttling windows for passing fluid are arranged on the side wall of the sleeve at intervals. The throttling windows are uniformly distributed along the circumference of the side wall of the sleeve. A plurality of annular grooves for placing the sealing sheet are arranged inside the top wall of the sleeve at intervals along the radius of the top of the sleeve, and the annular grooves are concentric with each other.

[0008] The top of the sleeve is provided with guide rail structures equal to the number of throttle windows; each guide rail structure comprises a plurality of arc-shaped guide rails, each arc-shaped guide rail having an equal arc; the arc-shaped guide rails are arranged along the radius of the top of the sleeve and spaced outward from the center; each arc-shaped guide rail corresponds to an annular groove in the inner top wall of the sleeve;

[0009] A through hole for passing through the connecting rod is formed in the sealing sheet placed in the annular groove; the connecting rod passes through the arc-shaped guide rail and the through hole in the sealing sheet placed in the annular groove in sequence, the top of the connecting rod is fixed with a sliding block, the bottom of the connecting rod is fixed with a baffle, and the connecting rod is in sliding connection in the arc-shaped guide rail; the sliding block is located on the top of the sleeve and clamped on the arc-shaped guide rail, and the baffle is in the shape of a circular arc; the baffles at the bottom of the connecting rods in the same group of guide rail structures are arranged along the height direction of the throttle window and cover the throttle window, and the opening degree of the throttle window is adjusted by adjusting the position of the sliding block in the arc-shaped guide rail.

[0010] Preferably, two throttle windows symmetrically arranged along the axis are formed in the side wall of the sleeve; and two groups of guide rail structures are formed in the top of the sleeve.

[0011] Preferably, three arc-shaped guide rails having equal arcs are arranged in each group of guide rail structures.

[0012] Preferably, the arc of the arc-shaped guide rail is 60°-90°.

[0013] Preferably, the length of the sealing sheet is greater than or equal to twice the length of the corresponding arc-shaped guide rail.

[0014] Preferably, the connecting rod and the sealing sheet are in clearance fit.

[0015] Preferably, the width of the baffle is greater than the width of the throttle window; and the sum of the heights of all baffles at each throttle window is greater than or equal to the height of the throttle window.

[0016] Preferably, when the sliding block is located at the middle position of the arc-shaped guide rail, the baffle is also located at the middle position of the throttle window.

[0017] Preferably, an angle scale is arranged on the side surface of the arc-shaped guide rail, and the opening degree of the baffle in the throttle window is determined according to the angle scale.

[0018] In a second aspect, the application provides a method for adjusting the opening degree of a valve core assembly of a baffle-type sleeve control valve, which comprises the following steps:

[0019] The baffle-type sleeve control valve valve core assembly is installed on the valve body of the control valve, and a valve cover part is installed; the control valve is fixedly connected with the inlet pipeline and the outlet pipeline in a standard flange connection mode;

[0020] When all the sliders are located at the middle position of the arc-shaped guide rail, the baffle is also located at the middle position of the throttling window, at this time, it is in full-closed state, all the baffles shield the throttling window of the sleeve; moving all the sliders to the end of the arc-shaped guide rail drives the baffle to move to the side of the throttling window, at this time, it is in full-open state, all the baffles do not shield the throttling window of the sleeve; according to the actual application scene requirement, moving each slider to the required position can make the shielding area of the baffle cover a part of the throttling window area of the sleeve, so that the opening degree adjustment is realized.

[0021] The fluid enters the control valve inner cavity from the inlet pipe, flows out through the adjusted throttling window, and realizes flow regulation.

[0022] Compared with the prior art, the present application has the following beneficial effects:

[0023] The present application can realize the movement of the baffle by controlling the position of the slider without changing the structure of the traditional control valve valve body, and then change the flow area of the sleeve. In addition, for one throttling window, the number of baffles can be more than one. Therefore, this structure can realize different degrees of shielding of the sleeve valve throttling window at different heights, so that the opening degree of the sleeve control valve is more flexible. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A sectional view of the baffle sleeve control valve spool assembly is provided for the present embodiment;

[0025] Figure 2 A sleeve sectional view is provided for the present embodiment;

[0026] Figure 3 A sleeve isometric view is provided for the present embodiment;

[0027] Figure 4 A sleeve top wall internal section view is provided for the present embodiment;

[0028] Figure 5 A structure schematic view of the connection of the slider, connecting rod and baffle is provided for the present embodiment;

[0029] Figure 6 A sealing sheet structure schematic view is provided for the present embodiment;

[0030] In the figure: slider 1; connecting rod 2; sealing sheet 3; sleeve 4; arc-shaped guide rail 401; annular groove 402; throttling window 403; baffle 5. DETAILED DESCRIPTION

[0031] The present application will be further described and explained in conjunction with the drawings and specific embodiments. The technical features of each embodiment in the present application can be combined accordingly without conflict.

[0032] As Figure 1 shown, as a preferred embodiment of the present application, the present embodiment provides a sleeve control valve spool assembly, which comprises a slider 1, a connecting rod 2, a sealing sheet 3, a sleeve 4 and a baffle 5.

[0033] As Figure 2 and Figure 3 shown, the sleeve 4 is in a hollow cylindrical structure, and a plurality of throttle windows 403 for passing fluid are arranged on the side wall of the sleeve 4, and the throttle windows 403 are uniformly distributed along the circumference of the side wall of the sleeve 4. In the present embodiment, two throttle windows 403 are arranged on the side wall of the sleeve 4, and the two throttle windows 403 are arranged symmetrically along the axis of the cylindrical sleeve 4.

[0034] In the device provided by the present application, the top wall of the sleeve 4 has a certain thickness, and a plurality of annular grooves 402 for placing the sealing sheet 3 are arranged inside the top wall of the sleeve 4, and the annular grooves 402 are arranged at intervals along the radius of the top of the sleeve 4 from the center to the outside, and the annular grooves 402 are concentric rings with each other, as shown in Figure 4 In the present embodiment, three annular grooves 402 are arranged at intervals along the radius of the sleeve 4 from the center to the outside.

[0035] In the device provided by the present application, a guide rail structure equal in number to the throttle windows 403 is arranged on the top of the sleeve 4. Since two throttle windows 403 are arranged in the present embodiment, two sets of guide rail structures are arranged on the top of the sleeve 4.

[0036] Each set of guide rail structures comprises a plurality of arc-shaped guide rails 401, and each arc-shaped guide rail 401 has an equal radian; the arc-shaped guide rails 401 are arranged at intervals along the radius of the top of the sleeve 4 from the center to the outside, and each arc-shaped guide rail 401 corresponds to an annular groove 402 inside the top wall of the sleeve 4.

[0037] In the device provided by the present application, a through hole for passing through the connecting rod 2 is arranged on the sealing sheet 3 placed in the annular groove 402, as shown in Figure 6 The connecting rod 2 passes through the arc-shaped guide rail 401 and the through hole on the sealing sheet 3 placed in the annular groove 402 in sequence, and the connecting rod 2 is in clearance fit with the sealing sheet 3, and the sealing sheet can prevent leakage of fluid in the valve. As shown in Figure 5 The top of the connecting rod 2 is fixed with the slider 1, and the bottom of the connecting rod 2 is fixed with the baffle 5, so that the connecting rod 2 is in sliding connection in the arc-shaped guide rail 401, and the arc-shaped guide rail 401 limits the sliding of the connecting rod 2. The slider 1 is located on the top of the sleeve 4 and is clamped on the arc-shaped guide rail 401. The baffle 5 is in the shape of a circular arc, and the radian of the baffle 5 matches the radian of the inner wall of the sleeve 4.

[0038] Since the sealing sheet 3 will slide along with the connecting rod 2 in the annular groove 402, in order to ensure that the sealing sheet 3 can cover the arc-shaped guide rail 401 during the sliding process, the length of the sealing sheet 3 in the embodiment is greater than or equal to twice the length of the corresponding arc-shaped guide rail 401.

[0039] The baffles 5 at the bottom of each connecting rod 2 in the same group of guide rail structures are arranged along the height direction of the throttling window 403 and cover the throttling window 403, and the opening degree at the throttling window 403 is adjusted by adjusting the position of the sliding block 1 in the arc-shaped guide rail 401.

[0040] In the embodiment, the radian of each arc-shaped guide rail 401 is set to 60°. Of course, if the width of the throttling window 403 formed in the side wall of the sleeve 4 is relatively wide, the radian of the arc-shaped guide rail 401 can also be appropriately increased to avoid the situation that the baffle 5 cannot completely cover the throttling window 403. The radian of the arc-shaped guide rail 401 can be set to 60°-90°, and the person skilled in the art can set it according to the actual situation.

[0041] In the embodiment, one connecting rod 2 is arranged in each arc-shaped guide rail 401, and each group of guide rail structures has three connecting rods 2, and the lengths of the connecting rods 2 form an arithmetic sequence. Therefore, the baffles 5 at the bottom of the three connecting rods 2 are arranged from top to bottom along the height direction of the throttling window 403. The width of the baffle 5 is greater than the width of the throttling window 403; and the sum of the heights of all the baffles 5 at each throttling window 403 is greater than or equal to the height of the throttling window 403.

[0042] In the embodiment, the angle scale line is further arranged on the side of the arc-shaped guide rail 401, and the opening degree of the baffle 5 at the throttling window 403 can be clearly understood by reading the angle of the moving sliding block.

[0043] The embodiment further provides an opening degree adjusting method of the baffle-type sleeve control valve spool assembly, and the method is specifically as follows:

[0044] Firstly, the sealing sheet 3, the sliding block 1, the connecting rod 2 and the baffle 3 are installed on the sleeve 4 to form the baffle-type sleeve control valve spool assembly. The baffle-type sleeve control valve spool assembly is installed on the control valve body, and the valve cover part is installed; the control valve is fixedly connected with the inlet pipeline and the outlet pipeline in a standard flange connection mode.

[0045] When all the sliding blocks 1 are located at the middle position of the arc-shaped guide rail 401, the baffles 5 are also located at the middle position of the throttling window 403, and at this time, the full-closed state is achieved, and all the baffles 5 shield the throttling window 403 of the sleeve 4. When it is necessary to adjust the opening degree of the control valve, the position of the sliding block 1 in the arc-shaped guide rail 401 is moved to drive the baffle 5 to move. According to the angle scale line on the side of the arc-shaped guide rail 401, the position of the baffle 5 can be clearly understood. When the baffle 5 is moved to the required position, the baffle 5 shields a certain area of the throttling window of the sleeve 4, and the throttling area of the spool is adjusted.

[0046] When all sliders 1 are located at the end of the arc-shaped guide rail 401, the baffle 5 is moved to the side of the throttling window 403, at this time, it is in the fully open state, all baffles 5 do not block the throttling window 403 of the sleeve 4. According to the actual application scene requirement, each slider is moved to the required position, so that the area blocked by the baffle 5 can cover a part of the throttling window 403 area of the sleeve 4, realizing the opening degree adjustment. The fluid enters the control valve inner cavity from the inlet pipeline, flows out through the adjusted throttling window 403, realizing the flow regulation.

[0047] That is, the present application can adjust the area of the throttling window of the sleeve covered by the baffle through the movement of the slider; the sealing sheet can prevent the fluid in the valve from leaking from the guide rail. For one throttling window, the number of baffles can be more than one, therefore, the structure proposed by the present application can realize different degrees of shielding of the throttling window of the sleeve valve at different heights, so that the opening degree of the sleeve control valve can be more flexibly adjusted.

[0048] The above-described embodiments are only a preferred scheme of the present application, and are not intended to limit the present application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, all technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present application.

Claims

1. A valve core assembly for a baffle-type sleeve control valve, characterized in that, The application relates to a baffle sleeve control valve core assembly, which comprises a slider (1), a connecting rod (2), a sealing sheet (3), a sleeve (4) and a baffle (5). The sleeve (4) is in a hollow cylindrical structure, a plurality of throttle windows (403) for passing fluid are arranged on the side wall of the sleeve (4) at intervals, and the throttle windows (403) are uniformly distributed along the circumference of the side wall of the sleeve (4); a plurality of annular grooves (402) for placing the sealing sheets (3) are arranged on the inner top wall of the sleeve (4) at intervals along the radius of the top of the sleeve (4) from the center to the outside, and the annular grooves (402) are concentric rings. A guide rail structure equal in number to the throttle windows (403) is arranged on the top of the sleeve (4); each guide rail structure comprises a plurality of arc-shaped guide rails (401), and the radian of each arc-shaped guide rail (401) is equal; the arc-shaped guide rails (401) are arranged at intervals along the radius of the top of the sleeve (4) from the center to the outside, and each arc-shaped guide rail (401) corresponds to the annular groove (402) in the inner top wall of the sleeve (4).

2. The flapper sleeve control valve spool assembly of claim 1, wherein, A through hole for passing the connecting rod (2) is arranged on the sealing sheet (3) placed in the annular groove (402); the connecting rod (2) passes through the arc-shaped guide rail (401) and the through hole on the sealing sheet (3) placed in the annular groove (402) in sequence, the top of the connecting rod (2) is fixed with the slider (1), the bottom of the connecting rod (2) is fixed with the baffle (5), and the connecting rod (2) is in sliding connection in the arc-shaped guide rail (401); the slider (1) is located on the top of the sleeve (4) and is clamped on the arc-shaped guide rail (401), and the baffle (5) is in an arc shape; the baffles (5) at the bottoms of the connecting rods (2) in the same guide rail structure are arranged along the height direction of the throttle windows (403) and cover the throttle windows (403), and the opening degree of the throttle windows (403) is adjusted by adjusting the position of the slider (1) in the arc-shaped guide rail (401).

3. The flapper sleeve control valve spool assembly of claim 1, wherein, Two throttle windows (403) symmetric to the axis are arranged on the side wall of the sleeve (4); two groups of guide rail structures are arranged on the top of the sleeve (4).

4. The flapper sleeve control valve spool assembly of claim 1, wherein, Three arc-shaped guide rails (401) with equal radian are arranged in each guide rail structure.

5. The flapper sleeve control valve spool assembly of claim 1, wherein, The radian of the arc-shaped guide rail (401) is 60-90 degrees.

6. The flapper sleeve control valve spool assembly of claim 1, wherein, The length of the sealing sheet (3) is greater than or equal to twice the length of the corresponding arc-shaped guide rail (401).

7. The flapper sleeve control valve spool assembly of claim 1, wherein, The connecting rod (2) is in clearance fit with the sealing sheet (3).

8. The flapper sleeve control valve spool assembly of claim 1, wherein, The width of the baffle (5) is greater than the width of the throttle window (403); and the sum of the heights of all the baffles (5) at each throttle window (403) is greater than or equal to the height of the throttle window (403).

9. The flapper sleeve control valve spool assembly of claim 1, wherein, When the slider (1) is located at the middle position of the arc-shaped guide rail (401), the baffle (5) is also located at the middle position of the throttle window (403).

10. A method of adjusting the opening degree of the valve core assembly of the baffle sleeve control valve according to any one of claims 1 to 9, characterized by, An angle scale is arranged on the side surface of the arc-shaped guide rail (401), and the opening degree of the baffle (5) in the throttle window (403) is determined according to the angle scale. Specifically, the baffle sleeve control valve core assembly is installed on a control valve body, a valve cover part is installed, the control valve is fixedly connected with an inlet pipeline and an outlet pipeline in a standard flange connection mode, and the control valve is used. When all sliders (1) are located in the middle position of the arc-shaped guide rail (401), the baffle (5) is also located in the middle position of the throttling window (403), which is in a full-closed state, and all baffles (5) cover the throttling window (403) of the sleeve (4); moving all sliders (1) to the end of the arc-shaped guide rail (401) drives the baffle (5) to move to the side of the throttling window (403), which is in a full-open state, and all baffles (5) do not cover the throttling window (403) of the sleeve (4); according to the actual application scene requirement, each slider is moved to the required position, so that the area covered by the baffle (5) can cover part of the throttling window (403) area of the sleeve (4), realizing the opening degree adjustment; The fluid enters the control valve inner cavity from the inlet pipeline, flows out through the adjusted throttling window (403), and realizes flow regulation.

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