Control valve

Abstract

The invention relates to the field of fluid adjustment, in particular to a control valve with higher valve opening stability, which is characterized in that at least part of a guide part extends along the axial direction corresponding to a valve hole, at least part of the guide part is positioned in the valve hole, and the control valve further comprises a matching part in clearance fit with the guide part, one of the guide part and the matching part is limited or fixed with the valve hole wall part or is of an integrated structure, and the other one of the guide part and the matching part is limited or fixed with the valve element body part or is of an integrated structure; namely, the guide part and the valve element body part are limited or fixed or of an integrated structure, the matching part and the valve hole wall part are limited or fixed or of an integrated structure, and the guide part and the matching part are in clearance fit to limit the valve element part. Or, the guide part and the valve hole wall part are limited or fixed or of an integrated structure, the matching part and the valve element body part are limited or fixed or of an integrated structure, and the guide part and the matching part are in clearance fit to limit the valve element part, so that the radial deviation of the valve element part is reduced, and the valve opening stability is improved.

Description

Technical Field

[0001] The present invention relates to the field of fluid regulation, and particularly to a control valve.

Background Art

[0002] A control valve includes an inlet, an outlet, and a chamber. The control valve includes a valve core, and the valve core is located in the chamber. High-pressure fluid flows into the control valve through the inlet, and after passing through the valve hole corresponding to the valve core, it flows out of the control valve through the outlet. During the valve opening process, the valve core offsets radially along the valve core, causing an impact between the valve core and the hole wall portion corresponding to the valve hole, or a situation where the valve core and the wall portion corresponding to the valve hole are stuck after the valve core offsets radially along the valve core, affecting the valve opening stability.

Summary of the Invention

[0003] The present invention provides a control valve to solve the above problems:

[0004] A control valve includes a valve core portion and a valve body portion. The valve hole portion includes a valve hole, and the valve core portion includes a valve core body portion. The valve core body portion cooperates with the valve hole wall portion corresponding to the valve hole to realize the closing and opening of the control valve. The control valve includes a guiding portion, at least a part of the guiding portion extends along the axis direction corresponding to the valve hole, and at least a part of the guiding portion is located in the valve hole. The control valve further includes a mating portion that is in clearance fit with the guiding portion. One of the guiding portion and the mating portion is limited or fixed or integrally structured with the valve hole wall portion, and the other of the guiding portion and the mating portion is limited or fixed or integrally structured with the valve core body portion.

[0005] For such a control valve, at least a part of the guiding portion extends along the axis direction corresponding to the valve hole, and at least a part of the guiding portion is located in the valve hole. The control valve further includes a mating portion that is in clearance fit with the guiding portion. One of the guiding portion and the mating portion is limited or fixed or integrally structured with the valve hole wall portion, and the other of the guiding portion and the mating portion is limited or fixed or integrally structured with the valve core body portion; that is, the guiding portion and the valve core body portion are limited or fixed or integrally structured, the mating portion and the valve hole wall portion are limited or fixed or integrally structured, and the guiding portion and the mating portion are in clearance fit to limit the valve core portion; or, the guiding portion and the valve hole wall portion are limited or fixed or integrally structured, the mating portion and the valve core body portion are limited or fixed or integrally structured, and the guiding portion and the mating portion are in clearance fit to limit the valve core portion, reducing the radial offset of the valve core portion and improving the valve opening stability.

Description of the Drawings

[0006] Figure 1 It is a cross-sectional view of the control valve when the valve core portion is in the second position in an embodiment;

[0007] Figure 2 It is a cross-sectional view of the control valve when the valve core portion is in the first position in an embodiment;

[0008] Figure 3Cross-sectional view of the control valve when the spool part is disposed at the second position with the first hole and the valve hole being eccentric;

[0009] Figure 4 Cross-sectional view of the control valve when the spool part is disposed at the second position for another embodiment;

[0010] Figure 5 Cross-sectional view of the control valve when the spool part is disposed at the first position for another embodiment;

[0011] Figure 6 Cross-sectional view of the control valve when the spool part is disposed at the second position with the first hole and the valve hole being eccentric.

[0012] Reference numerals:

[0013] Spool part 1, spool body part 11, accommodation cavity 111, first end part 12, guide through hole 13;

[0014] Valve body part 2;

[0015] Valve hole part 3, valve hole 31, valve hole wall part 32;

[0016] Guide part 4, guide arm 41;

[0017] Fitting part 5, first hole 51;

[0018] First wall part 6;

[0019] Valve cavity 7, inlet cavity 71, outlet cavity 72, balance cavity 73;

[0020] Nut 8; lead screw 9; sealing part 010;

[0021] First direction 001; conduction channel 002, first position 003, second position 004.

Detailed implementation manners

[0022] The technical solutions of the detailed implementation manners will be described below with reference to the accompanying drawings:

[0023] Refer to Figures 1 - 6, the control valve includes a driving part (not shown in the figure), a lead screw 9, a nut 8, a valve body part 2 and a valve core part 1. The valve body part 2 includes a valve hole part 3. The valve hole part 3 and the valve body part 2 can be an integral structure. The valve core part 1 cooperates with the corresponding valve hole part 3 of the valve body part 2 to realize opening or closing of the control valve. Of course, as other embodiments, the valve hole part 3 and the valve body part 2 can be a split structure. For example, a valve seat (not shown in the figure) is provided on the valve body part 2. The valve seat includes the valve hole part 3. The valve core part 1 cooperates with the corresponding valve hole part 3 of the valve seat to realize closing or opening of the control valve. The control valve includes a valve cavity 7. At least part of the driving part, the lead screw 9 and the valve core part 1 are located in the valve cavity 7. At least part of the driving part drives the lead screw 9 to rotate. The lead screw 9 and the valve body part 2 are limitedly arranged. The lead screw 9 rotates around its corresponding axis. The lead screw 9 and the valve body part 2 are relatively stationary along the axis corresponding to the lead screw 9. Specifically, the lead screw 9 and the valve body part 2 can be in bearing cooperation. A part of the lead screw 9 extends into the nut 8. The lead screw 9 and the nut 8 are in threaded cooperation. The nut 8 and the valve body part 2 are in limited cooperation. Specifically, the valve body part 2 restricts the nut 8 from rotating around the axis corresponding to the lead screw 9. The nut 8 can move relative to the valve body part 2 along the axis corresponding to the lead screw 97. The lead screw 9 rotates around its corresponding axis. The nut 8 moves linearly relative to the lead screw 9 along the axis corresponding to the lead screw 9. The nut 8 moves linearly relative to the valve body part 2 along the axis corresponding to the lead screw 9. The nut 8 is stationary relative to the valve body part 2 in the circumferential direction along the axis corresponding to the lead screw 9. The valve core part 1 includes a valve core body part 11. The valve core body part 11 cooperates with the corresponding valve hole wall part 32 of the valve hole 31 to realize closing and opening of the control valve. The nut 8 and the valve core body part 11 are in limited cooperation. The nut 8 is limited to the valve core body part 11, and the nut 8 and the valve core body part 11 are arranged with a gap. That is, the lead screw 9 rotates around its corresponding axis, and the nut 8 drives the valve core body part 11 to move along the axis corresponding to the lead screw 9 to realize opening and closing of the control valve. The valve cavity 7 includes an inlet cavity 71, an outlet cavity 72 and a balance cavity 73. The valve core body part 11 cooperates with the corresponding valve hole wall part 32 of the valve hole 31 to realize conduction and disconnection of the inlet cavity 71 and the outlet cavity 72 at the valve hole 31. It is defined that during the process of the control valve from the closed state to the open state, the moving direction of the valve core part 1 corresponding to the process of the gradually increasing flow rate of the control valve is the first direction 001. The balance cavity 73 is located above the valve core body part 11 along the first direction 001. The control valve includes a sealing part 010. The sealing part 010 is sleeved on the valve core body part 11, and the sealing part 010 is limited between the valve body part 2 and the valve core body part 11. When the control valve is in the closed state, the inlet cavity 71 and the balance cavity 73 are blocked. High-pressure fluid flows into the inlet cavity 71. The pressure in the inlet cavity 71 is relatively high, and the pressure in the balance cavity 73 is less than that in the inlet cavity 71, which is beneficial to the movement of the valve core body part 11.During the movement of the valve core body portion 11 in the first direction 001, the sealing portion 010 and the valve core body portion 11 move relative to each other, and the sealing portion 010 and the valve core body portion 11 rub against each other. The valve core body portion 11 is deflected under the influence of the frictional force. Specifically, the valve core body portion 11 is deflected in the radial direction of the valve core body portion 11.

[0024] The control valve includes a guiding portion 4. At least a part of the guiding portion 4 extends along the axis direction corresponding to the valve hole 31, and at least a part of the guiding portion 4 is located in the valve hole 31. The control valve further includes a mating portion 5 that is in clearance fit with the guiding portion 4. One of the guiding portion 4 and the mating portion 5 is limited or fixed or integrally structured with the valve hole wall portion 32, and the other of the guiding portion 4 and the mating portion 5 is limited or fixed or integrally structured with the valve core body portion 11.

[0025] For such a control valve, at least a part of the guiding portion 4 extends along the axis direction corresponding to the valve hole 31, and at least a part of the guiding portion 4 is located in the valve hole 31. The control valve further includes a mating portion 5 that is in clearance fit with the guiding portion 4. One of the guiding portion 4 and the mating portion 5 is limited or fixed or integrally structured with the valve hole wall portion 32, and the other of the guiding portion 4 and the mating portion 5 is limited or fixed or integrally structured with the valve core body portion 11; that is, the guiding portion 4 and the valve core body portion 11 are limited or fixed or integrally structured, the mating portion 5 and the valve hole wall portion 32 are limited or fixed or integrally structured, and the guiding portion 4 and the mating portion 5 are in clearance fit to limit the valve core portion 1; or, the guiding portion 4 and the valve hole wall portion 32 are limited or fixed or integrally structured, the mating portion 5 and the valve core body portion 11 are limited or fixed or integrally structured, and the guiding portion 4 and the mating portion 5 are in clearance fit to limit the valve core portion 1, reducing the radial offset of the valve core portion 1 and improving the valve opening stability.

[0026] The guiding portion 4 includes a guiding arm 41. The guiding arm 41 extends along the axis direction corresponding to the valve hole 31. The mating portion 5 includes a first hole 51. At least a part of the guiding arm 41 passes through the first hole 51, and the guiding arm 41 is in clearance fit with the corresponding wall portion of the first hole 51. Thus, through the cooperation between the corresponding wall portion of the first hole 51 and the guiding arm 41, during the movement of the valve core portion 1, the mating portion 5 limits the valve core portion 1 radially, reducing the radial offset of the valve core portion 1 and improving the valve opening stability.

[0027] Of course, in different embodiments, the structures of the mating portion 5 and the guiding portion 4 are different.

[0028] In one embodiment, refer to Figures 1 - 3, the fitting portion 5 is located in the valve hole 31, and the wall portion corresponding to the fitting portion 5 and the valve hole 31 is limited or fixed, or is an integral structure. Specifically, the wall portion corresponding to the first hole 51 is or is substantially annular; the fitting portion 5 includes a first wall portion 6, and the first wall portion 6 is located between the wall portion corresponding to the first hole 51 and the valve hole wall portion 32. More specifically, the first wall portion 6 extends from the wall portion corresponding to the first hole 51 toward the valve hole wall portion 32, and the first wall portion 6 and the valve hole wall portion 32 are limited or fixed or are an integral structure. Thus, the fitting portion 5 and the wall portion corresponding to the valve hole 31 are limited or fixed, or are an integral structure. More specifically, the first wall portion 6 and the valve hole wall portion 32 are welded and fixed or are an integral structure; the valve core body portion 11 has a first end portion 12 in the opposite direction of the first direction 001, and the guide arm 41 and the first end portion 12 are limited or fixed or integrally connected, and the guide arm 41 extends along the axial direction corresponding to the valve hole 31; specifically, the guide arm 41 and the first end portion 12 are welded and fixed or are an integral structure.

[0029] Specifically, it is defined that the position of the valve core portion 1 corresponding to the maximum flow rate of the control valve is the first position 003, and when the flow rate of the control valve is the smallest, specifically, the position of the valve core portion 1 corresponding to the valve closing state of the control valve is the second position 004. When the valve core portion 1 is located at the first position 003, the guide arm 41 passes through the first hole 51, and the guide portion 4 and the first hole 51 are in clearance fit. When the valve core portion 1 is located at the second position 004, the guide arm 41 passes through the first hole 51, and the guide portion 4 and the first hole 51 are in clearance fit; that is, during the entire process of opening the control valve and the entire process of closing the control valve, the guide arm 41 passes through the first hole 51, and the guide arm 41 and the wall portion corresponding to the first hole 51 are in clearance fit. Thus, during the entire process of opening the control valve and the entire process of closing the control valve, the fitting portion 5 limits the guide portion 4, that is, the fitting portion 5 radially limits the valve core portion 1, reduces the radial offset of the valve core portion 1, and improves the valve opening stability. Compared with other embodiments, for example, during the process of opening the valve, the valve core portion 1 moves along the first direction 001. As the valve core portion 1 moves, the fitting portion 5 and the guide portion 4 change from clearance fit to the guide arm 41 moving outside the first hole 51. When the valve core portion 1 moves in the opposite direction of the first direction 001, during the process of the guide arm 41 moving from outside the first hole 51 to at least part of the guide arm 41 passing through the first hole 51, there is a radial offset of the guide arm 41 along the valve hole portion 3, resulting in a collision or jamming between the guide arm 41 and the wall portion corresponding to the first hole 51. In this embodiment, during the entire process of opening the control valve or the entire process of closing the control valve, the guide arm 41 and the wall portion corresponding to the first hole 51 are in clearance fit, that is, at least part of the guide arm 41 is always located in the first hole 51, the fitting portion 5 and the guide portion 4 are in clearance fit, and the fitting portion 5 radially limits the valve core portion 1, reduces the radial offset of the valve core portion 1, and improves the valve opening stability.

[0030] There is a conduction channel 002 between the wall portion corresponding to the first hole 51 and the wall portion of the valve hole 32. When the valve core portion 1 moves in the first direction 001, that is, when the control valve is in the open valve state, the conduction channel 002 conducts the inlet cavity 71 and the outlet cavity 72 to achieve the conduction of the fluid.

[0031] Specifically, the number of the first wall portions 6 is at least 2, and the first wall portions 6 are circumferentially distributed around the axis corresponding to the valve hole 31. The conduction channel 002 is located between the adjacent first wall portions 6. When the control valve is in the open valve state, the conduction channel 002 conducts the inlet cavity 71 and the outlet cavity 72 to achieve the conduction of the fluid.

[0032] More specifically, the guiding arm 41 is a columnar shaft. More specifically, the guiding arm 41 can be a cylindrical shaft, and the guiding arm 41 extends along the wall portion corresponding to the valve hole 31; the axis corresponding to the guiding arm 41 coincides with the axis corresponding to the valve hole 31, and the axis corresponding to the first hole 51 coincides with the axis corresponding to the valve hole 31, that is, the first hole 51, the valve hole 31 and the guiding arm 41 are coaxially arranged, and the radial limit of the valve core portion 1 by the matching portion 5 is more stable. In other embodiments, for example, if the first hole 51 and the valve hole 31 are eccentrically arranged, it will cause the valve core portion 1 to be unstable during the movement process. During the opening and closing processes of the control valve, the valve core portion 1 generates a radial offset, resulting in collisions or jams between the wall portion 32 of the valve hole and the valve core body portion 11.

[0033] More specifically, there is a shaft-hole fit between the guiding portion 4 and the matching portion 5, and the distance between the guiding arm 41 and the wall portion corresponding to the first hole 51 is >0 and ≤0.1 mm.

[0034] The valve core portion 1 includes a through hole 13. At least part of the conduction is located in the guiding arm 41, and at least part of the guiding arm 41 is located in the outlet cavity 72. The through hole 13 conducts the outlet cavity 72 and the balance cavity 73, that is, during the opening process of the control valve, the pressure balance between the balance cavity 73 and the outlet cavity 72 is achieved, which is more conducive to the movement of the valve core portion 1 and realizes the opening of the control valve.

[0035] In one embodiment, refer to Figures 4 - 6, the guiding part 4 includes a guiding arm 41 which extends along the axial direction corresponding to the valve hole 31. The guiding part 4 includes a first wall part 6 which is located between the valve hole wall part 32 and the guiding arm 41. The first wall part 6 is limited or fixed or integrally structured with the valve hole wall part 32. Thus, the guiding part 4 and the valve hole wall part 32 are limited or fixed or integrally structured. Specifically, the guiding arm 41 and the valve hole wall part 32 are fixed by welding or integrally structured. The valve core body part 11 has a first end part 12 along the opposite direction of the first direction 001. The first end part 12 is limited or fixed or integrally structured with the matching part 5. Specifically, the first end part 12 and the matching part 5 are integrally structured. The matching part 5 includes a first hole 51. At least part of the guiding arm 41 is inserted into the first hole 51, and the guiding arm 41 is in clearance fit with the wall part corresponding to the first hole 51.

[0036] Specifically, it is defined that the position of the valve core part 1 corresponding to the maximum flow rate of the control valve is the first position 003. When the flow rate of the control valve is the smallest, specifically, the position of the valve core part 1 corresponding to the control valve in the closed valve state is the second position 004. When the valve core part 1 is located at the first position 003, the guiding arm 41 is inserted into the first hole 51, and the guiding part 4 is in clearance fit with the first hole 51. When the valve core part 1 is located at the second position 004, the guiding arm 41 is inserted into the first hole 51, and the guiding part 4 is in clearance fit with the first hole 51. During the whole process of opening the control valve and the whole process of closing the control valve, the guiding arm 41 is inserted into the first hole 51, and the guiding arm 41 is in clearance fit with the wall part corresponding to the first hole 51. Thus, during the whole process of opening the control valve and the whole process of closing the control valve, the guiding part 4 limits the matching part 5, that is, the guiding part 4 radially limits the valve core part 1, reduces the radial offset of the valve core part 1, and improves the opening valve stability. Compared with other embodiments, for example, during the process of opening the valve, the valve core part 1 moves along the first direction 001. As the valve core part 1 moves, the matching part 5 and the guiding part 4 change from clearance fit to the guiding arm 41 being located outside the first hole 51. When the valve core part 1 moves in the opposite direction of the first direction 001, during the process of the guiding arm 41 moving from outside the first hole 51 to at least part of the guiding arm 41 being inserted into the first hole 51, there is a radial offset of the valve core part 1 along the valve hole part 3, resulting in a situation where the guiding arm 41 collides with or jams with the wall part corresponding to the first hole 51. In this embodiment, during the whole process of opening the control valve or the whole process of closing the control valve, the guiding arm 41 is in clearance fit with the wall part corresponding to the first hole 51, that is, at least part of the guiding arm 41 is always inserted into the first hole 51. The matching part 5 and the guiding part 4 are in clearance fit. The guiding part 4 radially limits the valve core part 1, reduces the radial offset of the valve core part 1, and improves the opening valve stability.

[0037] There is a conduction channel 002 between the guiding arm 41 and the valve hole wall part 32. During the process of the valve core part 1 moving along the first direction 001, that is, when the control valve is in the open valve state, the conduction channel 002 conducts the inlet cavity 71 and the outlet cavity 72 to realize the conduction of the fluid.

[0038] Specifically, the number of the first wall portions 6 is at least two, the first wall portions 6 are circumferentially distributed around the axis corresponding to the valve hole 31, the conduction channel 002 is located between adjacent first wall portions 6, and when the control valve is in the open valve state, the conduction channel 002 conducts the inlet cavity 71 and the outlet cavity 72 to achieve the conduction of the fluid.

[0039] More specifically, the guiding arm 41 is a columnar shaft. More specifically, the guiding arm 41 can be a cylindrical shaft, and the guiding arm 41 extends along the wall portion corresponding to the valve hole 31; the axis corresponding to the guiding arm 41 coincides with the axis corresponding to the valve hole 31, and the axis corresponding to the first hole 51 coincides with the axis corresponding to the valve hole 31, that is, the first hole 51, the valve hole 31 and the guiding arm 41 are coaxially arranged, and the radial limit of the valve core portion 1 by the matching portion 5 is more stable. In other embodiments, for example, if the first hole 51 and the valve hole 31 are eccentrically arranged, it will cause the valve core portion 1 to be unstable during the movement process. During the opening and closing processes of the control valve, the valve core portion 1 generates a radial offset, resulting in collisions or jams between the valve hole wall portion 32 and the valve core body portion 11.

[0040] More specifically, there is a shaft hole fit between the guiding portion 4 and the matching portion 5, and the distance between the guiding arm 41 and the wall portion corresponding to the first hole 51 is >0 and ≤0.1 mm.

[0041] The control valve includes a through hole 13, the through hole 13 is located in the guiding arm 41, at least part of the guiding arm 41 is located in the outlet cavity 72, the valve core body portion 11 has a receiving cavity 111, the receiving cavity 111 communicates with the balance cavity 73, and the through hole 13 communicates the outlet cavity 72 and the receiving cavity 111. Thus, the through hole 13 communicates the outlet cavity 72 and the balance cavity 73, that is, during the opening process of the control valve, the pressure balance between the balance cavity 73 and the outlet cavity 72 is achieved, which is more conducive to the movement of the valve core portion 1 and realizes the opening of the control valve.

[0042] It should be noted that: Although this specification has described the present invention in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the technical field can still modify, combine or equivalently replace the present invention, and all technical solutions and their improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A control valve, the control valve comprising a valve core part (1) and a valve body part (2), characterized in that, The valve hole part (3) includes a valve hole (31), the valve core part (1) includes a valve core body part (11), and the valve core body part (11) cooperates with the valve hole wall part (32) corresponding to the valve hole (31) to realize the closing and opening of the control valve. The control valve includes a guiding part (4), at least part of the guiding part (4) extends along the axis direction corresponding to the valve hole (31), and at least part of the guiding part (4) is located in the valve hole (31). The control valve further includes a cooperating part (5) that is in clearance fit with the guiding part (4). One of the guiding part (4) and the cooperating part (5) is in a limiting or fixed or integral structure with the valve hole wall part (32), and the other of the guiding part (4) and the cooperating part (5) is in a limiting or fixed or integral structure with the valve core body part (11).

2. The control valve according to claim 1, characterized in that, The cooperating part (5) includes a first hole (51), the guiding part (4) includes a guiding arm (41), the guiding arm (41) extends along the axis direction corresponding to the valve hole (31), at least part of the guiding arm (41) penetrates through the first hole (51), and the guiding arm (41) is in clearance fit with the wall part corresponding to the first hole (51).

3. The control valve according to claim 2, wherein It is defined that the moving direction of the valve core part (1) corresponding to the process of gradually increasing the flow rate of the control valve is the first direction (001). The valve core body part (11) has a first end part (12) along the opposite direction of the first direction (001). The guiding arm (41) is in a limiting or fixed or integral structure with the first end part (12). The cooperating part (5) includes a first wall part (6), the first wall part (6) is located between the wall part corresponding to the first hole (51) and the valve hole wall part (32), and the first wall part (6) is in a limiting or fixed or integral structure with the valve hole wall part (32).

4. The control valve according to claim 3, wherein, There is a conduction channel (002) between the wall part corresponding to the first hole (51) and the valve hole wall part (32). The control valve includes a valve cavity (7), the valve core part (1) is located in the valve cavity (7), the valve cavity (7) includes an inlet cavity (71) and an outlet cavity (72). The valve core body part (11) and the valve hole wall part (32) cooperate to realize the conduction and disconnection of the inlet cavity (71) and the outlet cavity (72) at the valve hole (31). During the process of the valve core part (1) moving along the first direction (001), the conduction channel (002) conducts the inlet cavity (71) and the outlet cavity (72).

5. The control valve according to claim 3 or 4, characterized in that, The number of the first wall parts (6) is at least 2, the first wall parts (6) are circumferentially distributed around the axis corresponding to the valve hole (31), and the conduction channel (002) is located between adjacent first wall parts (6).

6. The control valve according to claim 2, characterized in that, Define that the moving direction of the spool part (1) corresponding to the process of gradually increasing the flow rate of the control valve is the first direction (001). The spool body part (11) has a first end part (12) along the opposite direction of the first direction (001). The first end part (12) and the matching part (5) are limited or fixed or of an integral structure. The guiding part (4) includes a first wall part (6). The first wall part (6) is located between the guiding arm (41) and the valve hole wall part (32). The first wall part (6) and the valve hole wall part (32) are limited or fixed or of an integral structure.

7. The control valve according to claim 6, characterized in that, There is a conduction channel (002) between the guiding arm (41) and the valve hole wall part (32). The control valve includes a valve cavity (7). The valve cavity (7) includes an inlet cavity (71) and an outlet cavity (72). The spool body part (11) and the valve hole wall part (32) cooperate to realize the conduction and disconnection of the inlet cavity (71) and the outlet cavity (72) at the valve hole (31). During the movement of the spool part (1) along the first direction (001), the conduction channel (002) conducts the inlet cavity (71) and the outlet cavity (72).

8. The control valve according to claim 6 or 7, characterized in that, The number of the first wall parts (6) is at least two. The first wall parts (6) are circumferentially distributed around the axis corresponding to the valve hole (31). The conduction channel (002) is located between adjacent first wall parts (6).

9. The control valve according to any one of claims 1, 2, 3, 4, 6, and 7, characterized in that The guiding part (4) and the matching part (5) are in shaft-hole fit. The clearance between the shaft and the hole is > 0 mm and ≤ 0.1 mm.

10. The control valve according to any one of claims 2, 3, 4, 6, and 7, characterized in that, The guiding arm (41) is a columnar shaft. The axis corresponding to the guiding arm (41) coincides with the axis corresponding to the valve hole (31). The axis corresponding to the first hole (51) coincides with the axis corresponding to the valve hole (31).

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