Variable flow characteristic regulating valve

Abstract

The invention provides a variable flow characteristic regulating valve. The variable flow characteristic regulating valve comprises a valve body, a valve seat, a valve element, a balance seat, a sleeve assembly and a valve deck. The sleeve assembly is installed on the valve seat, the balance seat is installed on the sleeve assembly, and the valve deck is installed on the valve body and sequentially presses the valve seat, the sleeve assembly and the balance seat. The valve element is installed in a cylindrical cavity formed by the valve seat and the inner side of the sleeve assembly, and the outer wall face of the valve element is attached to the inner wall face of the valve seat and the inner wall face of the sleeve assembly. By adjusting the relative position of the valve element and the sleeve assembly, a flow channel of fluid passing through the sleeve assembly is changed, and the flow resistance is changed to achieve the purpose of flow adjustment. By changing the arrangement type of the internal throttling element, the purpose of changing the flow characteristics can be achieved without replacing the whole valve or the internal throttling element, and the requirement for adjusting the flow characteristics of the valve according to needs under different working conditions is met.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a variable flow characteristic regulating valve. Background Art

[0002] The regulating valve changes the size of the throttling effect of the fluid flowing through it, thereby changing the flow resistance applied to the fluid flowing through it (causing a pressure drop in the fluid), thereby achieving a regulating effect on the flow rate. In the process of achieving the pressure drop, it should be avoided as much as possible that the fluid is lower than the saturation pressure and cavitation occurs during the pressure drop, which causes abnormal vibration and noise problems, and damages the throttling elements inside the valve (such as the valve core, valve seat, etc.), affecting the overall service life of the valve. At present, regulating valves for high-temperature and high-pressure fluids usually use a labyrinth flow channel. By setting a reasonable flow channel, the fluid is allowed to reduce pressure step by step in the labyrinth flow as much as possible, thereby avoiding cavitation.

[0003] The flow characteristic of a control valve refers to the relationship between the relative stroke of the valve (the ratio of the actual stroke of the valve core to the rated stroke) and the relative flow (the ratio of the actual flow to the rated flow), which reflects the flow change characteristics of the valve under a certain amount of valve core movement. Typical flow characteristics include linear, equal percentage, and quick opening. Different flow regulation characteristics correspond to different regulation requirements, and generally require comprehensive consideration from the aspects of control quality, working conditions, load, and change characteristics. Usually, the type of regulation characteristic and the corresponding relationship of the control valve will be determined when it leaves the factory. When the regulation requirements change, it is often necessary to replace the internal throttling element of the control valve to change the flow characteristics, which is time-consuming and labor-intensive and affects the daily use of the control valve. The flow characteristics of the common labyrinth control valve are usually determined by the internal throttling parts before use, and cannot be adjusted and changed after commissioning.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention and does not constitute any limitation to the present invention. Summary of the invention

[0005] In view of the shortcomings of the prior art mentioned above, the present invention discloses a variable flow characteristic regulating valve, which achieves the purpose of changing the flow characteristic without replacing the entire valve or replacing the internal throttling element by changing the layout type of the internal throttling element (maze flow channel), thereby meeting the need for on-demand adjustment of the valve flow characteristics under different working conditions.

[0006] The present invention provides a variable flow characteristic regulating valve, comprising a valve body, a valve seat, a valve core, a balancing seat, a sleeve assembly and a valve cover; the valve seat is installed in the valve body, the sleeve assembly is installed on the valve seat, the balancing seat is installed on the sleeve assembly, and the valve cover is installed on the valve body and presses the valve seat, the sleeve assembly and the balancing seat in sequence; the valve core is installed in a cylindrical cavity formed inside the valve seat and the sleeve assembly, and the outer wall surface of the valve core fits with the inner wall surfaces of the valve seat and the sleeve assembly; wherein, the fluid flows in from the inlet of the valve body, passes through the sleeve assembly, the valve core and its cylindrical cavity, flows downward from the valve seat and finally flows out from the outlet of the valve body; by adjusting the relative position of the valve core and the sleeve assembly, the flow path of the fluid passing through the sleeve assembly is changed, and the flow resistance is changed to achieve the purpose of flow regulation.

[0007] In one embodiment of the present invention, the sleeve assembly includes multiple sleeve components with different cross-sectional radii. The multiple sleeve components are distributed in the radial direction of the sleeve assembly and are plugged into each other to form the sleeve assembly. When the gaps between the multiple sleeve components are connected, multiple flow channels of the sleeve assembly are formed.

[0008] In one embodiment of the present invention, the plurality of flow channels of the sleeve assembly are distributed in the moving direction of the valve core.

[0009] In one embodiment of the present invention, the cross-sectional area of ​​the flow channel of the sleeve assembly gradually increases from the inlet side to the outlet side of the valve body.

[0010] In one embodiment of the present invention, the flow channel of the sleeve assembly includes vertical flow channels and horizontal flow channels distributed in the radial direction thereof, and a 90° bend is formed between the connected vertical flow channels and the horizontal flow channels.

[0011] In one embodiment of the present invention, the effective length of the vertical flow channel is adjusted by moving the movable sleeve component to change the flow channel type of the sleeve assembly.

[0012] In one embodiment of the present invention, the flow channel type of the sleeve assembly includes a straight flow channel and a non-straight flow channel. In the straight flow channel, the flow channel axes formed by the gaps between adjacent sleeve components in the radial direction of the sleeve assembly coincide with each other; in the non-straight flow channel, the flow channel axes formed by the gaps between adjacent sleeve components in the radial direction of the sleeve assembly do not coincide with each other.

[0013] In one embodiment of the present invention, the flow channel type of the sleeve assembly also includes a full straight flow channel and a partial straight flow channel. The full straight flow channel is entirely composed of straight flow channels, and the partial straight flow channel is composed of straight flow channels and non-straight flow channels.

[0014] In one embodiment of the present invention, the multiple flow channels of the sleeve assembly in the direction of valve core movement correspond to multiple sleeve components in the same group. By moving the movable sleeve component, the effective length of the vertical flow channel is adjusted by adjusting the single sleeve component in the same group, thereby changing the flow channel type of the multiple flow channels in the sleeve assembly.

[0015] In one embodiment of the present invention, a single sleeve component corresponds to a plurality of flow passages in the sleeve assembly including different flow passage types.

[0016] The beneficial effects of the present invention are as follows: by changing the different assembly modes of the sleeve components in the labyrinth sleeve assembly, the distribution and change rate of the flow resistance of the internal flow channel in the vertical height are changed. When the valve core moves from bottom to top in the vertical direction (i.e., when the valve opening increases), the flow characteristics of the valve can be changed as a whole or in part without disassembling the valve and replacing the components. The flow resistance required by the regulating valve can be matched by the cross-sectional area of ​​the flow channels at different heights and the number of flow channels at the same vertical height, thereby meeting the adjustment requirements between the flow characteristics and the valve position change.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 It is a structural schematic diagram of the variable flow characteristic regulating valve of the present invention;

[0020] Figure 2 It is a schematic diagram of the flow passage cross section of the variable flow characteristic regulating valve of the present invention under the initial working condition;

[0021] Figure 3 for Figure 2 Partially enlarged images of area b and area c;

[0022] Figure 4 for Figure 2 Partially enlarged images of area a and area b;

[0023] Figure 5 It is a schematic diagram of a flow passage cross section of a variable flow characteristic regulating valve of the present invention under working conditions of an embodiment;

[0024] Figure 6 It is a schematic diagram of a flow passage cross section of a variable flow characteristic regulating valve of the present invention under working conditions of an embodiment;

[0025] Figure 7 It is a schematic diagram of the flow passage cross section of the variable flow characteristic regulating valve of the present invention under the working condition of one embodiment.

[0026] In the figure: 1. valve body; 2. valve seat; 3. valve core; 4. balance seat; 5. sleeve assembly; 6. valve cover; 7. valve stem; 8. inlet; 9. outlet. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied by other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are to describe specific specific embodiments, rather than to limit the scope of protection of the present invention.

[0028] See also Figures 1 to 7 . It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any structural modification, change in proportional relationship, or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as position and quantitative relationship cited in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0029] See also Figures 1 to 4 The present invention provides a variable flow characteristic regulating valve, comprising a valve body 1, a valve seat 2, a valve core 3, a balance seat 4, a sleeve assembly 5 and a valve cover 6; the valve seat 2 is installed in the valve body 1, the sleeve assembly 5 is installed on the valve seat 2, the balance seat 4 is installed on the sleeve assembly 5, and the valve cover 6 is installed on the valve body 1 and presses the valve seat 2, the sleeve assembly 5 and the balance seat 4 in sequence; the valve core 3 is installed in a cylindrical cavity formed inside the valve seat 2 and the sleeve assembly 5, and the outer wall surface of the valve core 3 is in contact with the inner wall surfaces of the valve seat 2 and the sleeve assembly 5; wherein, the fluid flows in from the inlet 8 of the valve body 1, passes through the sleeve assembly 5, the valve core 3 and its cylindrical cavity, flows downward from the valve seat 2 and finally flows out from the outlet 9 of the valve body 1; by adjusting the relative position of the valve core 3 and the sleeve assembly 5, the flow channel of the fluid passing through the sleeve assembly 5 is changed, and the flow resistance is changed to achieve the purpose of flow regulation.

[0030] Furthermore, the sleeve assembly 5 includes a plurality of sleeve components with different cross-sectional radii, the plurality of sleeve components are distributed in the radial direction of the sleeve assembly 5 and are plugged into each other to form the sleeve assembly 5, and a plurality of flow channels of the sleeve assembly 5 are formed when the gaps between the plurality of sleeve components are connected.

[0031] Specifically, in the embodiment of the present invention, the regulating valve further includes a valve stem 7 connected to the valve core 3, the lower portion of the valve stem 7 is connected to the upper portion of the valve core 3, and the valve core 3 can be moved up and down within the space formed by the lower end surface of the valve cover 6 and the upper end surface of the valve seat 2 by moving up and down. Figure 1 As shown, according to the different vertical heights in the regulating valve, the sleeve assembly 5 can be formed by inserting sleeve parts with different cross-sectional radii, and they are named sleeve part (1) to sleeve part (5) from the outer layer to the inner layer, that is, a labyrinth flow channel is formed in the sleeve assembly 5. The fluid is fed from the inlet 8 ( Figure 1 The left side of the valve body flows into the valve body, passes through the sleeve assembly 5, the valve core 3 and the cylindrical cavity where it is located, flows downward from the valve seat 2 and finally flows out of the valve body 1 outlet 9 ( Figure 1 By moving the valve stem 7, the relative position of the valve core 3 and the variable flow characteristic labyrinth sleeve assembly 5 can be changed, thereby changing the type and number of labyrinth flow channels through which the fluid flows through the sleeve assembly 5, changing the flow resistance and achieving the purpose of flow regulation.

[0032] Please see attached Figure 2 , which is a schematic diagram of the flow passage section formed by cutting along the vertical center plane under the initial working condition of the sleeve assembly 5, and the line segments (1) to (5) marked at the upper and lower ends of the figure represent the sleeve component (1) to the sleeve component (5). It can also be divided into three areas along the valve bottom to the valve top according to the different flow passage patterns formed, namely area a, area b and area c, to correspond to different flow passage patterns.

[0033] See also Figure 3 , which is a partial enlarged view of the divided area b and area c, and the corresponding geometric dimensions are defined as follows: l1 is the length of the vertical flow channel in the sleeve part (1). d1 is the height difference between the horizontal flow channel in the sleeve part (1) and the horizontal flow channel in the sleeve part (2) below. l2 is the relatively small value of the vertical flow channel length in the sleeve part (5) (the larger value is l1).

[0034] See also Figure 4 , which is a partial enlarged view of area a and area b, and the corresponding geometric dimensions are defined as follows: l1 is the relatively large value of the vertical flow channel length in the sleeve part (1) (the smaller value is l2). d2 is the height difference between the horizontal flow channel in the sleeve part (1) and the horizontal flow channel in the sleeve part (2) below.

[0035] More specifically, see Figure 1 According to the different vertical heights, the three regions (region a, region b and region c) of the sleeve assembly 5 correspond to different flow channel patterns. The working process of the variable flow characteristic of the regulating valve is as follows: under the initial working condition, by adjusting the number of flow channel groups of the sleeve assembly 5 on its circumference, the flow rate of the regulating valve changes linearly with the change of the position of the valve core 3. In regions a, b and c, each group of flow channels formed by the sleeve assembly 5 at different vertical heights contains a corresponding number of curved flow channels and a straight flow channel connecting each curved flow channel. When it is necessary to change the flow regulation characteristic of the regulating valve, the sleeve component (2) and the sleeve component (4) in the sleeve assembly 5 are moved downward by a corresponding distance. By setting a reasonable moving distance value, a new flow channel pattern can be formed in the sleeve assembly 5.

[0036] See also Figure 1 to Figure 2 In one embodiment, the multiple flow channels of the sleeve assembly 5 are distributed in the moving direction of the valve core 3. In this way, the feed amount of the valve core 3 is controlled by the valve stem 7 to select the number of flow channels in the sleeve assembly 5 connecting the inlet 8 and the outlet 9 of the regulating valve.

[0037] The cross-sectional area of ​​the flow channel of the sleeve assembly 5 gradually increases from the inlet 8 side to the outlet 9 side of the valve body 1 (not shown in the drawings). In the embodiment of the present invention, the pressure of the fluid in the labyrinth-shaped flow channel of the sleeve assembly 5 is gradually and continuously reduced during the flow process, thereby effectively suppressing the formation of cavitation, reducing the noise and vibration during the operation of the valve, and extending the service life of key components.

[0038] See also Figures 2 to 4 In one embodiment, the flow channel of the sleeve assembly 5 includes vertical flow channels and horizontal flow channels distributed in its radial direction, and a 90° bend is formed between the connected vertical flow channels and horizontal flow channels. The effective length of the vertical flow channels is adjusted by moving the sleeve component to change the flow channel pattern of the sleeve assembly 5. Specifically, in areas a, b and c, each group of flow channels formed by the sleeve assembly 5 at different vertical heights contains eight 90° bent flow channels and straight flow channels connecting the bends. When the flow regulation characteristics need to be changed, the sleeve component (2) and the sleeve component (4) in the sleeve assembly 5 are moved downward by a distance of l=l2. By setting reasonable l1, l2, d1, and d2 values, a new flow channel pattern can be formed in the sleeve assembly 5 accordingly.

[0039] See also Figures 2 to 7 In one embodiment, the flow channel type of the sleeve assembly 5 includes a straight-flow type flow channel and a non-straight-flow type flow channel. In the straight-flow type flow channel, the flow channel axes formed by the gaps between the adjacent sleeve components of the sleeve assembly 5 in the radial direction coincide with each other; in the non-straight-flow type flow channel, the flow channel axes formed by the gaps between the adjacent sleeve components of the sleeve assembly 5 in the radial direction do not coincide with each other.

[0040] Furthermore, the flow channel type of the sleeve assembly 5 also includes a full direct flow type flow channel and a partial direct flow type flow channel. The full direct flow type flow channel is entirely composed of direct flow type flow channels, and the partial direct flow type flow channel is composed of direct flow type flow channels and non-direct flow type flow channels.

[0041] Specifically, in the embodiments of the present invention, as shown in the attached Figure 5 As shown, a typical arrangement of the sleeve assembly 5 in the regulating valve is: l1=2l2, d1=d2=l2; when the sleeve component (2) and the sleeve component (4) in the sleeve assembly 5 move downward by a distance of l2, the new flow channel cross-section is as shown in FIG. Figure 5 As shown. It can be seen that at this time, area a does not contain 90° curved flow channels, and all of them are straight flow channels. The flow resistance in this area is smaller than that in the initial working condition. When the valve core 3 moves vertically upward or downward in area a, the change in flow resistance caused by moving the same distance is smaller than that in the initial working condition.

[0042] Similarly, there are four 90° bends in region b, and the rest are straight-flow channels. Compared with region a, the flow resistance in region b is larger (but still smaller than the corresponding position under the initial working condition). When the valve core 3 moves vertically upward or downward in region b, the change in flow resistance caused by moving the same distance is smaller than that under the initial working condition (but larger than the change in flow resistance in region a at this time).

[0043] Region c contains eight 90° curved channels. Compared with regions a and b, the flow resistance in region c is relatively larger (but still smaller than the flow resistance in region c under the initial working condition). When the valve core 3 moves vertically upward or downward in region c, the change in flow resistance caused by moving the same distance is smaller than that under the initial working condition (but larger than the change in flow resistance in regions a and b at this time).

[0044] See also Figures 5 to 7 In one embodiment, the multiple flow channels of the sleeve assembly 5 in the moving direction of the valve core 3 correspond to multiple sleeve components in the same group. By moving a single sleeve component in the same group to adjust the effective length of the vertical flow channel, the flow channel types of the multiple flow channels in the sleeve assembly 5 are changed synchronously.

[0045] Furthermore, a single sleeve component corresponds to a plurality of flow channels in the sleeve assembly 5 including different flow channel patterns. By moving the movable sleeve component (e.g., sleeve component (2) and sleeve component (4) in the drawings) upward or downward, the flow channel pattern of the corresponding flow channel in the sleeve assembly 5 is changed, and thus, the effective length of the vertical flow channel can be adjusted by moving a single sleeve component of the same group.

[0046] Further, in the embodiment of the present invention, as shown in the attached Figure 6As shown, the flow resistance of the sleeve assembly 5 in different vertical height regions (i.e., region a, region b, and region c in the attached drawing) can be changed by changing the length l (0 < l ≤ l2) of the sleeve components (2) and (4) within the sleeve assembly 5 moving vertically, so as to change the length of the pipe segments of the labyrinth flow channels in the vertical direction, and further change the flow resistance of each group of flow channels in different vertical height regions, and finally achieve the change of the flow resistance and the change of the flow rate characteristics of the sleeve assembly 5. When the sleeve components (2) and (4) move downward by l (0 < l ≤ l2) vertically, that is, the flow resistance in regions a, b, and c is reduced compared with the default working conditions.

[0047] More specifically, by setting the difference between the maximum length and the minimum length of the vertical flow channels corresponding to a single sleeve component to be constant, that is, when multiple flow channels corresponding to a single sleeve component are all in the state of non-direct flow type channels, the length ratio of the vertical flow channels is 1:2, and as the sleeve component moves, the lengths of the vertical flow channels in different corresponding flow channels change linearly, and when there is a direct flow type channel, the length of the vertical flow channel in the non-direct flow type channel is half of the maximum value. As shown in the attached Figure 7 drawing, there is the following working condition: move the sleeve components (2) and (4) within the sleeve assembly 5 downward by a distance of (l1 + d1) (that is, move the adjacent sleeve components from the flow channels formed at the previous height position to the flow channels at the next height position). Since there is a maximum length of the vertical flow channels in the non-direct flow type channels in regions a and b, the flow channel types in regions a and b can be kept unchanged, while there is no maximum length of the vertical flow channels in the non-direct flow type channels in region c, that is, the adjacent sleeve components are not enough to move from the previous height position to the corresponding next height position. Therefore, the flow channel in region c changes from the initial working condition of eight 90° bends to the direct flow type. That is, the flow resistance in regions a and b remains unchanged, and the flow resistance in region c is reduced; thus, only the local change of the flow rate characteristics in a specific valve opening region (i.e., region c, corresponding to the small valve opening condition) is achieved, while keeping the flow rate adjustment characteristics at other positions unchanged.

[0048] In summary, a variable flow rate characteristic regulating valve provided by the present invention changes the position of the sleeve components within the sleeve assembly in the vertical direction, forms flow channel types in different regions, generates flow resistances different from the initial working conditions, and further changes the flow rate characteristics of the valve. When moving to a specific position, the purpose of only changing the flow resistance of a local region (the lower-layer labyrinth flow channels) can be achieved on the premise that the flow channel types of the upper-layer and middle-layer labyrinth flow channels remain unchanged (i.e., the flow resistance remains unchanged), so that the flow rate characteristics only change locally at a small opening (i.e., the region where the flow channel type of the lower-layer labyrinth changes).

[0049] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A variable flow characteristic regulating valve, characterized in that: The valve body (1) comprises a valve seat (2), a valve core (3), a balance seat (4), a sleeve assembly (5) and a valve cover (6); the valve seat (2) is installed in the valve body (1), the sleeve assembly (5) is installed on the valve seat (2), the balance seat (4) is installed on the sleeve assembly (5), and the valve cover (6) is installed on the valve body (1) and presses the valve seat (2), the sleeve assembly (5) and the balance seat (4) in sequence; the valve core (3) is installed in a cylindrical cavity formed inside the valve seat (2) and the sleeve assembly (5), and the outer wall surface of the valve core (3) is in contact with the inner wall surface of the valve seat (2) and the sleeve assembly (5); The fluid flows in from the inlet (8) of the valve body (1), passes through the sleeve assembly (5), the valve core (3) and its cylindrical cavity, flows downward from the valve seat (2) and finally flows out from the outlet (9) of the valve body (1); by adjusting the relative position of the valve core (3) and the sleeve assembly (5), the flow path of the fluid passing through the sleeve assembly (5) is changed, and the flow resistance is changed to achieve the purpose of flow regulation.

2. The regulating valve according to claim 1, characterized in that: The sleeve assembly (5) comprises a plurality of sleeve components with different cross-sectional radii, wherein the plurality of sleeve components are distributed in the radial direction of the sleeve assembly (5) and are plugged into each other to form the sleeve assembly (5), and when the gaps between the plurality of sleeve components are connected, a plurality of flow channels of the sleeve assembly (5) are formed.

3. The regulating valve according to claim 2, characterized in that: The multiple flow channels of the sleeve assembly (5) are distributed in the moving direction of the valve core (3).

4. The regulating valve according to claim 3, characterized in that: The cross-sectional area of ​​the flow channel of the sleeve assembly (5) gradually increases from the inlet (8) side to the outlet (9) side of the valve body (1).

5. The regulating valve according to claim 4, characterized in that: The flow channel of the sleeve assembly (5) comprises a vertical flow channel and a horizontal flow channel distributed in the radial direction thereof, and a 90° bend is formed between the connected vertical flow channel and the horizontal flow channel.

6. The regulating valve according to claim 5, characterized in that: The effective length of the vertical flow channel is adjusted by moving the sleeve component, thereby changing the flow channel pattern of the sleeve assembly (5).

7. The regulating valve according to claim 6, characterized in that: The flow channel type of the sleeve assembly (5) includes a straight-flow type flow channel and a non-straight-flow type flow channel. In the straight-flow type flow channel, the flow channel axes formed by the gaps between the adjacent sleeve components in the radial direction of the sleeve assembly (5) coincide with each other; in the non-straight-flow type flow channel, the flow channel axes formed by the gaps between the adjacent sleeve components in the radial direction of the sleeve assembly (5) do not coincide with each other.

8. The regulating valve according to claim 7, characterized in that: The flow channel type of the sleeve assembly (5) also includes a full straight-flow type flow channel and a partial straight-flow type flow channel. The full straight-flow type flow channel is entirely composed of the straight-flow type flow channel, and the partial straight-flow type flow channel is composed of the straight-flow type flow channel and the non-straight-flow type flow channel.

9. The regulating valve according to any one of claims 6 to 8, characterized in that: The multiple flow channels of the sleeve assembly (5) in the moving direction of the valve core (3) correspond to the multiple sleeve components in the same group. By moving a single sleeve component in the same group, the effective length of the vertical flow channel is adjusted, and the flow channel types of the multiple flow channels in the sleeve assembly (5) are changed synchronously.

10. The regulating valve according to claim 9, characterized in that: The single sleeve component corresponds to a plurality of flow passages in the sleeve assembly (5) including different flow passage types.

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