Sleeve control valve core assembly with flexible opening adjustment and opening adjustment method

Abstract

The present invention discloses a sleeve control valve core assembly with flexible adjustable opening and an opening adjustment method, belonging to the field of control valves. The device consists of an outer sleeve, an inner valve core, an operating rod, a blocking rod, a main spring, a sealing plate, a positioning plate, a support rod, and a support spring. A guide rail is provided on the inner valve core, and an operating rod is placed in the guide rail. The operating rod has two degrees of freedom and can move up and down, and can also move along the guide rail. The blocking rod is installed in a small hole on the operating rod, and a spring is installed at its base to connect it to the central axis of the inner valve core, and an axial deep groove is provided to place the support spring and the support rod. The outer sleeve is provided with a throttle hole to allow fluid to flow out through the throttle hole. By moving the operating rod, the blocking rod can be ejected and block the throttle hole on the outer sleeve, reducing the throttling area; or the blocking rod can be retracted, releasing the throttle hole, and increasing the throttling area. The structure proposed by the present invention can make the opening of the sleeve control valve more flexible.

Description

Technical Field

[0001] The present invention belongs to the field of control valves, and in particular relates to a sleeve control valve core assembly with flexible adjustable opening and an opening adjustment method. Background Art

[0002] A control valve is a component that uses an actuator or manual control to control the valve core opening to ensure that the pressure, temperature, velocity, flow rate and other parameters of the fluid behind the valve are within the specified range of the operating conditions. As the demand for industrial applications continues to increase, the demand for control valves with high pressure regulation accuracy in industries such as nuclear power, chemical industry, and military is becoming increasingly urgent. The current sleeve control valve has low opening adjustment flexibility and cannot meet the working conditions of high pressure regulation accuracy. Therefore, constructing a sleeve control valve core with flexible opening adjustment and proposing its application method to provide ideas for the design of industrial control valves with high pressure regulation accuracy is an important research direction in the field of fluid control.

[0003] Therefore, there is an urgent need to provide a control valve and an application method thereof that can be applied to high pressure regulation accuracy and realize flexible change of opening. Summary of the Invention

[0004] The present invention aims to address the shortcomings of the prior art and provides a flexibly adjustable sleeve control valve spool assembly and method for adjusting the opening. The present invention allows the throttling area of ​​the control valve to be changed by manually adjusting the position of the joystick on the inner spool without changing the valve body structure.

[0005] The specific technical solutions adopted in the present invention are as follows:

[0006] In a first aspect, the present invention provides a sleeve-controlled valve core assembly with a flexibly adjustable opening, comprising an inner valve core and an outer sleeve arranged coaxially and in close contact; the outer sleeve is provided with a plurality of rows of vertically distributed throttling holes evenly arranged along the circumference; the inner valve core is a hollow cylindrical structure having two circumferential wall surfaces, and a plurality of axial throttling windows are provided at the same position of the two wall surfaces along the circumference, with the throttling windows being provided at positions corresponding to the positions of each row of throttling holes;

[0007] The top of the inner valve core has two layers of wall surfaces, the gap between the two layers of wall surfaces is used to place the sealing plate, and the two layers of wall surfaces are provided with a plurality of guide rails distributed along the circumference at the same position; the length direction of the guide rail is consistent with the radial direction, and is used for vertically inserting the operating rod; a circular hole with the same diameter as the operating rod is provided in the center of the sealing plate; a round rod is provided at the central axis of the inner valve core, which is used for sliding connection with one end of the main spring; the lower part of the operating rod is axially provided with a plurality of horizontal through holes for inserting the blocking rod, and the upper part is axially provided with scales and a plurality of horizontal rectangular through holes for placing the positioning plate; one end of the blocking rod has a protrusion and serves as a base, and the base is fixedly connected to the other end of the main spring, and the main spring can press the blocking rod onto the inner wall surface of the inner valve core in the circumferential direction; a cylindrical groove is provided axially at the base, and the closed end of the cylindrical groove is connected to one end of the support spring, and the other end of the support spring is fixed with a support rod; the support rod can pass through the middle of the main spring under the elastic force of the support spring and press onto the central axis round rod of the inner valve core.

[0008] Preferably, clearance fit is adopted between the inner valve core and the outer sleeve, between the operating rod and the inner valve core, between the operating rod and the sealing sheet, and between the operating rod and the blocking rod.

[0009] Preferably, the length of the positioning piece is slightly larger than the diameter of the joystick.

[0010] Preferably, the length of the sealing sheet is greater than twice the length of the guide rail on the top surface of the inner valve core.

[0011] Preferably, the diameter of the cylindrical groove at the base of the blocking rod is greater than or equal to the diameter of the support rod, and the length of the support rod is greater than the depth of the cylindrical groove at the base of the blocking rod and smaller than the inner diameter of the inner wall of the inner valve core.

[0012] Preferably, the positions of the plurality of vertically distributed throttling holes opened circumferentially on the outer sleeve are opposite to the positions of the circumferentially distributed guide rails on the top surface of the inner valve core, and the number of the throttling holes is equal to the number of the blocking rods.

[0013] Preferably, the positioning piece is a cuboid, and its cross-sectional dimensions are the same as those of the rectangular through hole on the joystick.

[0014] In a second aspect, the present invention provides a method for adjusting the opening of a sleeve control valve core assembly using any one of the flexibly adjustable openings described in the first aspect, as follows:

[0015] Insert one end of several blocking rods horizontally into the horizontal through hole at the bottom of the operating rod, and connect the other end to the main spring; insert the operating rod vertically into the guide rail, so that the operating rod moves along the guide rail toward the central axis of the inner valve core until the end of the guide rail, and at the same time drives the blocking rod to move toward the central axis and compresses the main spring; pull out the positioning piece in the rectangular through hole on the operating rod and press the operating rod downward, and the operating rod drives the blocking rod to move downward; judge the displacement of the operating rod downward movement according to the scale on the operating rod, and when it moves to the required position, insert the positioning piece into the rectangular through hole of the operating rod, release the operating rod, and the main spring will push the operating rod to the outer end of the guide rail; at the same time, the support spring installed in the cylindrical groove at the base of the blocking rod will pop out the support rod to prevent the main spring from tilting, so that the main spring can pop out the blocking rod horizontally to block the throttling flow hole on the outer sleeve and adjust the throttling area;

[0016] The fluid entering the valve body cavity from the inlet passes through the throttling hole of the outer sleeve and flows out of the valve body cavity from the bottom outlet of the inner valve core; by controlling the movement position of the operating lever, the opening of the sleeve control valve core can be flexibly adjusted.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention can realize the pop-out and retraction of the blocking rod by controlling the operating lever without changing the valve body structure of the traditional control valve, and change the flow area of ​​the outer sleeve by the pop-out of the blocking rod, so that the flow area of ​​the outer sleeve can change more smoothly, thereby realizing flexible change of the throttling area of ​​the control valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the valve core assembly of the sleeve control valve with flexible adjustment of the opening;

[0020] Figure 2 Schematic diagram of the outer sleeve structure; Figure (a) is a cross-sectional view, and Figure (b) is a parts view;

[0021] Figure 3 Schematic diagram of the inner valve core structure; Figure (a) is a cross-sectional view, Figure (b) is a parts diagram, and Figure c is a partial enlarged view;

[0022] Figure 4 Schematic diagram of the joystick structure; wherein Figure (a) is a front view and Figure (b) is a side view;

[0023] Figure 5 Schematic diagram of the blocking rod structure; wherein, Figure (a) is a cross-sectional view, Figure (b) is a top view, and Figure (c) is a parts drawing;

[0024] In the figure: 1. Control lever; 2. Positioning plate; 3. Sealing plate; 4. Inner valve core; 5. Main spring; 6. Blocking rod; 7. Outer sleeve; 8. Support rod; 9. Support spring. DETAILED DESCRIPTION

[0025] The present invention will be further described and illustrated below with reference to the accompanying drawings and specific embodiments. The technical features of each embodiment of the present invention may be combined accordingly, provided that there is no conflict between them.

[0026] like Figure 1 As shown, a sleeve-controlled valve core assembly with flexible opening adjustment provided by the present invention mainly includes an inner valve core 4 and an outer sleeve 7. The inner valve core 4 and the outer sleeve 7 are coaxially arranged from the inside to the outside. An operating rod 1, a blocking rod 6, a sealing plate 3, a positioning plate 2, a main spring 5, a support rod 8, and a support spring 9 are installed in the inner valve core 4. Among them, there is a clearance fit between the inner valve core 4 and the outer sleeve 7. The operating rod 1 can move vertically up and down and radially along the guide rail under the limit of the guide rail of the inner valve core 4. The blocking rod 6 can move radially along the inner valve core 4 under the limit of the hole of the operating rod 1. The support rod 8 can move radially along the inner valve core 4 under the limit of the axial deep groove at the base of the blocking rod 6.

[0027] The structure and arrangement of the inner valve core 4 and the outer sleeve 7 will be described in detail below.

[0028] In the present invention, Figure 2 As shown, the outer sleeve 7 is evenly provided with multiple rows of vertically distributed throttling holes along the circumference. In this embodiment, the throttling holes distributed circumferentially on the outer sleeve 7 are circular in shape, with 4 rows of throttling holes distributed circumferentially, and the number of throttling holes in each row is 10.

[0029] In the present invention, Figure 3 As shown, the inner valve core 4 is a hollow cylindrical structure with two inner and outer wall surfaces. Multiple axial throttling windows are circumferentially opened at the same position on both wall surfaces. The throttling windows are located opposite the position of each row of throttling holes. The top of the inner valve core 4 has two wall surfaces. The gap between the two wall surfaces is used to place the sealing plate 3. The two wall surfaces also have multiple guide rails distributed along the circumference at the same position. The length of the guide rails is consistent with the radial direction and is used for vertical insertion of the control rod 1. The center of the sealing plate 3 has a circular hole with the same diameter as the control rod 1. It is installed in the two-layer gap between the upper and lower surfaces of the inner valve core 4, and the control rod 1 is placed at its center. A round rod is provided at the central axis of the inner valve core 4 for sliding connection with one end of the main spring 5. In this embodiment, the outer diameter of the inner valve core 4 is the same as the inner diameter of the outer sleeve 7.

[0030] As a preferred embodiment of the present invention, the length of the sealing sheet 3 is greater than twice the length of the guide rail on the top surface of the inner valve core 4.

[0031] In the present invention, Figure 4 As shown, the lower portion of the operating rod 1 is provided with multiple horizontal through-holes along the axial direction for inserting the blocking rod 6. The upper portion is provided with an axial scale for observing the operating rod's travel. The area with the scale also has multiple horizontal rectangular through-holes along the axial direction for accommodating the positioning piece 2. The cross-sectional dimensions of the cylindrical portion of the blocking rod 6 are identical to those of the axially distributed through-holes in the operating rod 1. In this embodiment, the through-holes in the operating rod 1 are circular, and the cross-sectional shape of the operating rod 1 is also circular.

[0032] As a preferred embodiment of the present invention, the length of the positioning piece 2 is slightly larger than the diameter of the joystick 1. The positioning piece 2 is a rectangular parallelepiped, and its cross-sectional dimensions are the same as those of the rectangular through hole on the joystick 1.

[0033] In the present invention, Figure 5 As shown, one end of the blocking rod 6 has a protrusion that serves as a base. This base is fixedly connected to the other end of the main spring 5, which presses the blocking rod 6 against the inner circumferential wall of the inner valve core 4. A cylindrical groove is defined axially at the base. The closed end of the cylindrical groove is connected to one end of a support spring 9, the other end of which is secured to a support rod 8. When fully open, all support rods 8, under the elastic force of the support spring 9, pass through the middle of the main spring 5 and press against the central cylindrical rod of the inner valve core 4.

[0034] In a preferred embodiment of the present invention, the diameter of the cylindrical groove at the base of the blocking rod 6 is equal to or greater than the diameter of the support rod 8. The length of the support rod 8 is greater than the depth of the cylindrical groove at the base of the blocking rod 6 and less than the inner diameter of the inner wall of the inner valve core 4. The cross-sectional shape and size of the solid portion of the blocking rod 6 are identical to those of the throttling orifice in the outer sleeve 7. Its base is shaped differently from the main body and is connected to the central axis of the inner valve core via a main spring. In this embodiment, the main body of the blocking rod 5 has a circular cross-sectional shape, while the base is a combination of a square and a semicircle. The cross-sectional shape of the axially deep groove is circular.

[0035] As a preferred embodiment of the present invention, a clearance fit is adopted between the inner valve core 4 and the outer sleeve 7, a clearance fit is adopted between the operating rod 1 and the inner valve core 4, a clearance fit is adopted between the operating rod 1 and the sealing plate 3, and a clearance fit is adopted between the operating rod 1 and the blocking rod 6.

[0036] As a preferred embodiment of the present invention, the positions of several vertically distributed throttling holes opened along the circumferential direction on the outer sleeve 7 are opposite to the positions of the circumferentially distributed guide rails on the top surface of the inner valve core 4, and the number of throttling holes is equal to the number of blocking rods 6.

[0037] Utilizing the above-mentioned sleeve control valve core assembly capable of flexibly adjusting the opening, the present invention further provides an opening adjustment method, which is specifically as follows:

[0038] First, install the outer sleeve 7, inner valve core 4, sealing plate 3, operating lever 1, positioning plate 2, blocking rod 6, main spring 5, support rod 8, and support spring 9 to form the sleeve control valve core assembly, install the valve core assembly on the valve body, and install the valve cover and other parts, then connect the sleeve control valve to the inlet pipe and outlet pipe through standard flanges and other connection methods.

[0039] To adjust the control valve opening, manually insert one end of a blocking rod 6 horizontally into the horizontal through-hole at the bottom of the operating lever 1, with the other end connected to the main spring 5. Insert the operating lever 1 vertically into the guide rail and move it along the guide rail toward the center axis of the inner valve core 4 until it reaches the end of the guide rail. This simultaneously moves the blocking rod 6 toward the center axis and compresses the main spring 5. Pull out the positioning piece 2 from the rectangular through-hole on the operating lever 1 and press down on the operating lever 1, which then moves the blocking rod 6 downward. The scale on the operating lever 1 determines the desired downward movement of the operating lever 1. When the desired position is reached, insert the positioning piece 2 into the rectangular through-hole on the operating lever 1 corresponding to the current position. Release the operating lever 1, and the main spring 5 pushes the operating lever 1 to the outer end of the guide rail. Simultaneously, the support spring 9, mounted in the cylindrical groove at the base of the blocking rod 6, pushes the support rod 8 out, preventing the main spring 5 from tilting. This allows the main spring 5 to push the blocking rod 6 horizontally outward to block the throttling hole in the outer sleeve 7, adjusting the throttling area of ​​the valve core.

[0040] In this embodiment, when the valve core is fully open, all the blocking rods 6 are pressed against the inner wall surface of the inner valve core 4 by the main spring 5. When the positioning piece 2 on the operating lever 1 is taken out and the operating lever 1 is retracted inward and pressed down 3mm, the positioning piece 2 is inserted into the second rectangular through hole from the bottom to the top of the operating lever 1 and the operating lever 1 is released. The bottom blocking rod 6 on the operating lever 1 will be ejected by the main spring 5. At the same time, the support rod 8 in the bottom blocking rod 6 will also be ejected by the support spring 9 and press against the center axis of the inner valve core. Figure 1 As shown, the bottom blocking rod 6 blocks the corresponding throttling hole on the outer sleeve 7, reducing the throttling area of ​​the valve core.

[0041] The fluid entering the valve body cavity from the inlet passes through the flow hole of the outer sleeve 7 and flows out of the valve body cavity from the bottom outlet of the inner valve core 4. By controlling the movement position of the joystick 1, the opening of the sleeve control valve core can be flexibly adjusted.

[0042] The present invention allows the blocking rod to be extended by moving the operating lever, blocking the orifice in the outer sleeve and reducing the throttle area; or retracted to open the orifice and increase the throttle area. A sealing plate prevents fluid from leaking from the guide rail. The structure proposed in the present invention enables more flexible adjustment of the opening of the sleeve-controlled valve.

[0043] The embodiment described above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Persons skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, any technical solution obtained by equivalent substitution or equivalent transformation falls within the scope of protection of the present invention.

Claims

1. A sleeve control valve core assembly with flexible opening adjustment, characterized in that: The invention comprises an inner valve core (4) and an outer sleeve (7) which are coaxially arranged; the outer sleeve (7) is provided with a plurality of rows of vertically distributed throttling holes evenly arranged along the circumference; the inner valve core (4) is a hollow cylindrical structure having two layers of wall surfaces in the circumference, and a plurality of axial throttling windows are provided at the same position of the two layers of wall surfaces along the circumference, and the opening position of the throttling windows is directly opposite to the position of each row of throttling holes; The top of the inner valve core (4) has two wall layers, the gap between the two wall layers is used to place the sealing plate (3), and the two wall layers are provided with a plurality of guide rails distributed along the circumferential direction at the same position; the length direction of the guide rail is consistent with the radial direction, and is used to vertically insert the operating rod (1); a circular hole with the same diameter as the operating rod (1) is provided in the center of the sealing plate (3); a round rod is provided at the center axis of the inner valve core (4) for sliding connection with one end of the main spring (5); the lower part of the operating rod (1) is provided with a plurality of horizontal through holes for inserting the blocking rod (6) along the axial direction, and the upper part is provided with a scale along the axial direction and a circular hole along the axial direction. A plurality of horizontal rectangular through holes for placing positioning plates (2) are opened; one end of the blocking rod (6) has a protrusion and serves as a base, and the base is fixedly connected to the other end of the main spring (5), and the main spring (5) can press the blocking rod (6) onto the inner wall surface of the inner valve core (4) in the circumferential direction; a cylindrical groove is opened axially at the base, and the closed end of the cylindrical groove is connected to one end of the support spring (9), and the other end of the support spring (9) is fixed with a support rod (8); the support rod (8) can pass through the middle of the main spring (5) under the elastic force of the support spring (9) and press onto the central axis round rod of the inner valve core (4).

2. The spool assembly of a sleeve control valve with flexible opening adjustment according to claim 1, characterized in that: A clearance fit is adopted between the inner valve core (4) and the outer sleeve (7), between the operating rod (1) and the inner valve core (4), between the operating rod (1) and the sealing sheet (3), and between the operating rod (1) and the blocking rod (6).

3. The spool assembly of the sleeve control valve with flexible opening adjustment according to claim 1, characterized in that: The length of the positioning piece (2) is slightly greater than the diameter of the operating rod (1).

4. The spool assembly of a sleeve-controlled valve with flexible opening adjustment according to claim 1, characterized in that: The length of the sealing sheet (3) is greater than twice the length of the guide rail on the top surface of the inner valve core (4).

5. The spool assembly of a sleeve-controlled valve with flexible opening adjustment according to claim 1, characterized in that: The diameter of the cylindrical groove at the base of the blocking rod (6) is greater than or equal to the diameter of the support rod (8), and the length of the support rod (8) is greater than the depth of the cylindrical groove at the base of the blocking rod (6) and less than the inner diameter of the inner wall of the inner valve core (4).

6. The spool assembly of a sleeve-controlled valve with flexible opening adjustment according to claim 1, characterized in that: The positions of the plurality of vertically distributed throttling holes opened along the circumferential direction on the outer sleeve (7) are directly opposite to the positions of the circumferentially distributed guide rails on the top surface of the inner valve core (4), and the number of the throttling holes is equal to the number of the blocking rods (6).

7. The spool assembly of a sleeve-controlled valve with flexible opening adjustment according to claim 1, characterized in that: The positioning piece (2) is a rectangular parallelepiped, and its cross-sectional dimensions are the same as those of the rectangular through hole on the joystick (1).

8. A method for adjusting the opening of a spool valve assembly using the sleeve control valve with flexible opening adjustment according to any one of claims 1 to 7, characterized in that: The details are as follows: Insert one end of a plurality of blocking rods (6) horizontally into the horizontal through hole at the bottom of the operating rod (1), and connect the other end to the main spring (5); insert the operating rod (1) vertically into the guide rail, and move the operating rod (1) along the guide rail toward the center axis of the inner valve core (4) until the end of the guide rail, while driving the blocking rod (6) to move toward the center axis and compress the main spring (5); pull out the positioning piece (2) in the rectangular through hole on the operating rod (1) and press the operating rod (1) downward, so that the operating rod (1) drives the blocking rod (6) to move downward; according to the position of the operating rod (1) ) is used to judge the displacement of the joystick (1) moving downward. When it moves to the desired position, the positioning piece (2) is inserted into the rectangular through hole of the joystick (1), and the joystick (1) is released. At this time, the main spring (5) pushes the joystick (1) to the outer end of the guide rail; at the same time, the support spring (9) installed in the cylindrical groove at the base of the blocking rod (6) pops out the support rod (8) to prevent the main spring (5) from tilting, so that the main spring (5) can pop out the blocking rod (6) horizontally to block the throttling flow hole on the outer sleeve (7) and adjust the throttling area; The fluid entering the inner cavity of the valve body from the inlet passes through the throttling hole of the outer sleeve (7) and flows out of the inner cavity of the valve body from the bottom outlet of the inner valve core (4); by controlling the movement position of the operating rod (1), the opening of the sleeve control valve core can be flexibly adjusted.

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