Control valve

Abstract

The invention relates to the field of fluid adjustment, in particular to a control valve with high valve opening stability, when a valve core part is located at the maximum valve opening position of the control valve, at least part of a guide part is located in a valve hole, and at least part of the guide part is in clearance fit with a hole wall part corresponding to the valve hole, that is, in the process that the control valve is switched from a valve closing state to a valve opening state, the valve opening stability is improved. At least part of the guide part is located in the valve hole, the hole wall part limits the valve element part, 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. 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 in the case 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 hole portion. The control valve includes a valve chamber. The valve core portion is located in the valve chamber. The valve core portion includes a guiding portion and a body portion. The guiding portion is limited or fixedly arranged with the body portion or the guiding portion and the body portion are of an integral structure. The valve hole portion includes a valve hole. When the valve core portion is at the maximum valve opening position of the control valve, at least a part of the guiding portion is located in the valve hole, and at least a part of the guiding portion is in clearance fit with the hole wall portion corresponding to the valve hole.

[0005] For such a control valve, when the valve core portion is at the maximum valve opening position of the control valve, at least a part of the guiding portion is located in the valve hole, and at least a part of the guiding portion is in clearance fit with the hole wall portion corresponding to the valve hole. That is, during the process of the control valve from the valve closed state to the valve open state, at least a part of the guiding portion is located in the valve hole, and the hole wall portion limits 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 a control valve in the valve closed state for an embodiment;

[0007] Figure 2 It is a cross-sectional view of the control valve corresponding to the body portion at the maximum valve opening position for an embodiment;

[0008] Figure 3 It is a schematic diagram of the body portion and the guiding portion for an embodiment;

[0009] Figure 4 It is a cross-sectional view of a control valve in the valve closed state for another embodiment;

[0010] Figure 5 It is a cross-sectional view of the control valve corresponding to the body portion at the maximum valve opening position for another embodiment;

[0011] Figure 6 It is a schematic diagram of the body portion and the guiding portion for another embodiment;

[0012] Figure 7 Cross-sectional view of a control valve in the closed valve state for another embodiment;

[0013] Figure 8 Cross-sectional view of the body part corresponding to the control valve at the maximum valve opening position for another embodiment;

[0014] Figure 9 Schematic diagram of the body part and the guiding part for another embodiment;

[0015] Figure 10 Cross-sectional view of a control valve in the closed valve state for yet another embodiment;

[0016] Figure 11 Cross-sectional view of the body part corresponding to the control valve at the maximum valve opening position for yet another embodiment;

[0017] Figure 12 Schematic diagram of the body part and the guiding part for yet another embodiment.

[0018] Reference numerals:

[0019] Spool part 01, body part 1, first end 11, first hole 12, first end portion 13, first position 131, second position 132, second space 14, first part 15, second part 16;

[0020] Valve hole part 2, valve hole 21, hole wall part 22;

[0021] Valve cavity 3, inlet cavity 31, outlet cavity 32, balance cavity 33;

[0022] Guiding part 4, guiding arm 41, mating section 411, transition section 412, second end portion 413, third end portion 414, connecting part 42;

[0023] Nut 5; Spring 6; Lead screw 7; Valve body part 8; Sealing part 9;

[0024] First direction 001; First space 002.

Detailed implementation manners

[0025] The technical solutions of the detailed implementation manners will be described below with reference to the accompanying drawings:

[0026] Refer to Figures 1 - 12, the control valve includes a driving part (not shown in the figure), a lead screw 7, a nut 5, a valve body part 8 and a valve core part 01. The valve body part includes a valve hole part 2. The valve hole part 2 and the valve body part 8 can be an integral structure. The valve core part 01 cooperates with the corresponding valve hole part 2 of the valve body part to realize opening or closing of the control valve. Of course, as other embodiments, the valve hole part 2 and the valve body part 8 can be a split structure. For example, a valve seat (not shown in the figure) is provided on the valve body part. The valve seat includes a valve hole part. The valve core part cooperates with the corresponding valve hole part of the valve seat to realize closing or opening of the control valve. The control valve includes a valve cavity 3. At least part of the driving part, the lead screw 7 and the valve core part 01 are located in the valve cavity 3. At least part of the driving part drives the lead screw 7 to rotate. The lead screw 7 and the valve body part 8 are limitedly arranged. The lead screw 7 rotates around its corresponding axis. The lead screw 7 and the valve body part 8 are relatively stationary along the direction of the corresponding axis of the lead screw 7. Specifically, the lead screw 7 and the valve body part 8 can be in bearing cooperation. A part of the lead screw 7 extends into the nut 5. The lead screw 7 and the nut 5 are in threaded cooperation. The nut 5 and the valve body part 8 are in limited cooperation. Specifically, the valve body part 8 restricts the nut 5 from rotating around the corresponding axis of the lead screw 7. The nut 5 can move relative to the valve body part 8 along the direction of the corresponding axis of the lead screw 7. The lead screw 7 rotates around its corresponding axis. The nut 5 moves linearly relative to the lead screw 7 along the direction of the corresponding axis of the lead screw 7. The nut 5 moves linearly relative to the valve body part 8 along the direction of the corresponding axis of the lead screw 7. The nut 5 is stationary relative to the valve body part 8 in the circumferential direction along the corresponding axis of the lead screw 7. The valve core part 01 includes a body part 1. The nut 5 and the body part 1 are in limited cooperation. The nut 5 is limited to the body part 1 and there is a gap between the nut 5 and the body part 1. That is, the lead screw 7 rotates around its corresponding axis, and the nut 5 drives the body part 1 to move along the direction of the corresponding axis of the lead screw 7 to realize opening and closing of the control valve. The valve cavity 3 includes an inlet cavity 31, an outlet cavity 32 and a balance cavity 33. During the process of the control valve changing from the closed state to the open state, the moving direction of the body part 1 is defined as the first direction 001. The balance cavity 33 is located above the body part 1 along the first direction 001. The control valve includes a sealing part 9. The sealing part 9 is sleeved on the body part 1 and is limited between the valve body part 8 and the body part 1. When the control valve is in the closed state, the inlet cavity 31 and the balance cavity 33 are blocked. High-pressure fluid flows into the inlet cavity 31. The pressure in the inlet cavity 31 is relatively high, and the pressure in the balance cavity 33 is less than that in the inlet cavity 31, which is beneficial to the movement of the body part 1. During the movement of the body part 1 along the first direction 001, the sealing part 9 and the body part 1 move relative to each other, and the sealing part 9 and the body part 1 rub against each other. The body part 1 is deflected under the influence of the frictional force. Specifically, the body part 1 is deflected along the radial direction of the body part 1.

[0027] The spool part 01 further includes a guiding part 4. The guiding part 4 is limited or fixedly arranged with the body part 1, or the guiding part 4 and the body part 1 are of an integral structure. The valve hole part 2 includes a valve hole 21. When the spool part 01 is at the maximum valve opening position of the control valve, at least part of the guiding part 4 is located in the valve hole 21, and at least part of the guiding part 4 is in clearance fit with the hole wall part 22 corresponding to the valve hole 21.

[0028] For such a control valve, when the spool part 01 is at the maximum valve opening position of the control valve, at least part of the guiding part 4 is located in the valve hole 21, and at least part of the guiding part 4 is in clearance fit with the hole wall part 22 corresponding to the valve hole 21. That is, during the process of the control valve from the closed valve state to the open valve state, at least part of the guiding part 4 is located in the valve hole 21, and the hole wall part 22 limits the spool part 01, reducing the radial offset of the spool part 01 and improving the valve opening stability.

[0029] In one embodiment, referring to Figures 1 - 3 , the body part 1 has a first end 11 along the opposite direction of the first direction 001, and the guiding part 4 includes a guiding arm 41, and the guiding arm 41 is located at the first end 11;

[0030] "The guiding arm 41 is located at the first end 11" can be understood as: at least part of the body part 1 and the guiding part 4 can be of an integral structure. Compared with limiting or fixedly arranging the guiding part 4 and the body part 1, the integral structure of at least part of the body part 1 and the guiding part 4 can save the process of limiting the guiding part 4 to the body part 1 and the installation is more efficient; of course, as other embodiments, the guiding part 4 and the body part 1 can be limited or fixedly arranged. For example, after the guiding part 4 and the body part 1 are processed separately, they are welded and fixed, which will not be elaborated here; of course, "the guiding arm 41 is located at the first end 11" can be understood as: the guiding arm 41 and the first end 11 are directly or indirectly connected. For example, the guiding arm 41 and the first end 11 are of an integral structure, and there is a transition structure between the guiding arm 41 and the first end 11; the guiding arm 41 and the first end 11 are of an integral structure, and the guiding arm 41 and the first end 11 are directly integrally connected; the guiding arm 41 and the first end 11 are limited or fixedly connected, and the guiding arm 41 and the first end 11 are directly connected; the guiding arm 41 and the first end 11 are limited or fixedly connected, and there is a transition structure between the guiding arm 41 and the first end 11.

[0031] The body part 1 includes a first hole 12 extending along the first direction 001. Along the axial direction corresponding to the body part 1, at least a part of the projection of the guiding arm 41 is located in the first hole 12. Specifically, the number of guiding arms 41 is at least 2, and the guiding arms 41 are circumferentially distributed around the axis corresponding to the body part 1. The cooperation between the guiding arms 41 and the hole wall part 22 is more stable. Of course, as another implementation manner, the number of guiding arms 41 can be 1. The guiding arm 41 extends along the radial or chordal direction of the cross-sectional circle corresponding to the first hole 12. The two ends of the guiding arm 41 along its extending direction are respectively in clearance fit with the hole wall part 22. There are more than 1 mating places between the guiding arm 41 and the hole wall part 22, which is more stable. Specifically, multiple guiding arms 41 are circumferentially arrayed around the axis corresponding to the body part 1. A single guiding arm 41 extends along the radial direction of the first hole 12, and each guiding arm 41 intersects the axis corresponding to the first hole 1. The control valve includes a nut 5 and a spring 6. At least a part of the nut 5 is limited in the first hole 12. The spring 6 is located in the first hole 12. Along the first direction 001 and the opposite direction of the first direction 001, one end of the spring 6 abuts against the nut 5, and the other end of the spring 6 abuts against the guiding arm 41. The guiding arm 41 can simultaneously play a role in supporting the spring 6. Thus, there is no need to additionally process a structure for supporting the spring 6 in the base material corresponding to the body part 1 or the guiding part 4. Specifically, it is convenient for at least a part of the body part 1 and the guiding part 4 to be an integral structure.

[0032] At least a part of the nut 5 is limited in the first hole 12. Specifically, the body part 1 includes a first part 15 and a second part 16. The second part 16 is located above the first part 15 along the first direction 001. The first part 15 and the second part 16 are of a split structure and are connected in a limited way. Specifically, the first part 15 and the second part 16 are fixedly connected. More specifically, the first part 15 and the second part 16 are fixedly connected by welding, making the fixation more firm. At least a part of the nut 5 is limited between the first part 15 and the second part 16, and there is a gap between the first part 15 and / or the second part 16 and the nut 5 along the first direction 001 or the opposite direction of the first direction 001. More specifically, the first part 15 has a first hole 12 extending along the axis direction corresponding to the body part 1. At least a part of the nut 5 is limited in the first hole 12. Along the first direction 001 or the opposite direction of the first direction 001, one end of the spring 6 abuts against the nut 5, and the other end of the spring 6 abuts against the guiding arm 41. Thus, the nut 5 is subjected to the elastic force of the spring 6 along the first direction 001, and the nut 5 abuts against the second part 16 located above the first part 15 along the first direction 001. There is a gap between at least a part of the nut 5 and the first part 15. During the process of the control valve changing from the open valve state to the closed valve state, when the control valve just reaches the closed state, the lead screw 7 can continue to rotate, and the nut 5 moves in the opposite direction of the first direction 001 until at least a part of the nut 5 abuts against the first part 15, which plays a buffering role in the rotation of the lead screw 7 when closing the valve. At the same time, under the action of the guiding part 4 being subjected to the elastic force of the spring 6 in the opposite direction of the first direction 001, the body part 1 abuts tightly against the hole wall part 22, making the control valve tightly closed when closing the valve and reducing the internal leakage situation.

[0033] The guiding part 4 has a guiding arm 41. The guiding arm 41 is located on one side of the body part 1 along the opposite direction of the first direction 001. There is a first space 002 between at least a part of the guiding arm 41 and the hole wall part 22. When the control valve is in the open valve state, the first space 002 communicates with the inlet cavity 31. Compared with other embodiments, in this embodiment, when the control valve is in the open valve state, it is convenient for the fluid to flow from the inlet cavity 31, through the first space 002 and the valve hole 21 to the outlet cavity 32, and the flow rate is relatively large. For example, the guiding arm is annular, and the size of the annular guiding arm is adapted to the hole wall part. When the valve core part reaches the maximum open valve position, at least a part of the guiding part is located in the valve hole. When the control valve is in the open valve state, the fluid needs to flow from the inlet cavity through the gap between the guiding part and the hole wall part to the outlet cavity, and the flow rate is relatively small.

[0034] It should be noted that in this embodiment, the number of the guiding arms 41 can be one or more, and there can be a first space 002 between the corresponding wall part of the guiding arm 41 and the hole wall part 22, which will not be elaborated here.

[0035] When the main body portion 1 is at the maximum valve opening position of the control valve, at least part of the guiding arm 41 is located in the valve hole 21. At least part of the guiding arm 41 is adapted to the corresponding hole wall portion 22 of the valve hole 21, and at least part of the guiding arm 41 is in clearance fit with the corresponding hole wall portion 22 of the valve hole 21.

[0036] Specifically, the guiding arm 41 includes a fitting section 411 and a transition section 412. The transition section 412 is located between the main body portion 1 and the fitting section 411. The fitting section 411 is adapted to the hole wall portion 22. When the control valve is in the closed valve state, the distance from the transition section 412 to the corresponding hole wall portion 22 gradually increases along the first direction 001.

[0037] For such a control valve, by the fitting section 411 being adapted to the hole wall portion 22, when the control valve is in the closed state, the distance from the transition section 412 to the corresponding hole wall portion 22 gradually increases along the first direction 001, that is, the distance from at least part of the wall portion corresponding to the guiding arm 41 to the corresponding hole wall portion 22 gradually increases along the first direction 001, avoiding the area of the fitting section 411 and the corresponding hole wall portion 22 being too large, and reducing the situation of the main body portion 1 hitting or jamming with the hole wall portion 22 during the movement of the main body portion 1.

[0038] More specifically, one guiding arm 41 has one fitting section 411, and the number of fitting sections 411 is at least 2. Of course, as other embodiments, the number of guiding arms 41 can also be 1. For example, the guiding arm 41 extends along the radial or chordal direction of the cross-sectional circle corresponding to the first hole 12, and the guiding arm 41 extends along the radial direction of the cross-section corresponding to the first hole 12; both ends of the guiding arm 41 along its extending direction can have fitting sections 411, and the number of fitting sections 411 is at least 2; the fitting sections 411 are circumferentially distributed along the axis corresponding to the main body portion 1, the clearance between the fitting section 411 and the corresponding hole wall portion 22 > 0 mm and < 1 mm. When the control valve is in the closed valve state, the maximum distance between the transition section 412 and the corresponding hole wall portion 22 is in the range of 0.05 mm - 1 mm.

[0039] For such a control valve, by the fitting sections 411 being circumferentially distributed along the axis corresponding to the main body portion 1, specifically, the fitting sections 411 are circumferentially arrayed along the axis corresponding to the main body portion 1. Thus, the main body portion 1 is more stable during the movement, avoiding the guiding arm 41 tilting radially, and reducing the situation of the main body portion 1 hitting or jamming; the clearance between the fitting section 411 and the corresponding hole wall portion 22 > 0 mm and < 1 mm, and during the movement of the main body portion 1, the hole wall portion 22 limits the guiding arm 41 more stably; when the control valve is in the closed valve state, the maximum distance between the transition section 412 and the corresponding hole wall portion 22 is in the range of 0.05 mm - 1 mm. Thus, the movement of the main body portion 1 is smoother, and the situation of the hole wall portion 22 and the guiding arm 41 hitting or jamming is reduced.

[0040] In one embodiment, referring to Figures 4 - 6 , along the opposite direction of the first direction 001, the body portion 1 has a first end portion 13. The first end portion 13 includes a first position 131 and a second position 132. The first position 131 is located on the outer peripheral side of the second position 132. The first position 131 is farther from the axis corresponding to the body portion 1 than the second position 132. The guiding portion 4 includes a guiding arm 41. The guiding arm 41 is located at the first position 131. The guiding arm 41 includes a second end portion 413 and a third end portion 414. The third end portion 414 is farther from the first end portion 13 than the second end portion 413 along the opposite direction of the first direction 001.

[0041] It should be noted that: "the guiding arm 41 is located at the first position 131" can be understood as that the guiding arm 41 and the first end portion 13 can be limited or fixedly arranged or an integral structure; if the guiding arm 41 and the first end portion 13 are limited or fixedly arranged, "the first position 131" refers to the connection position of the guiding arm 41 on the first end portion 13; if the guiding arm 41 and the first end portion 13 are an integral structure, "the first position 131" refers to the position where the guiding arm 41 and the first end portion 13 are integrally connected on the first end portion 13.

[0042] Of course, the guiding arm 41 can be limited to the first end portion 13. The guiding arm 41 and the body portion 1 are separately processed, and then the guiding arm 41 is limited to the first end portion 13. Specifically, the guiding arm 41 and the body portion 1 are welded and fixed. There is a small clearance fit between at least a part of the guiding arm 41 and the corresponding hole wall portion 22. The processing accuracy requirements for the guiding arm 41 are relatively high. Separately processing the guiding arm 41 is beneficial to improving the processing accuracy of the guiding arm 41.

[0043] At least a part of the nut 5 is limited to the valve core part 01. Specifically, the body part 1 includes a first part 15 and a second part 16. The second part 16 is located above the first part 15 along the first direction 001. The first part 15 and the second part 16 are of a split structure and are connected in a limiting manner. Specifically, the first part 15 and the second part 16 are fixedly connected. More specifically, the first part 15 and the second part 16 are fixedly connected by welding, making the fixation more firm. At least a part of the nut 5 is limited between the first part 15 and the second part 16, and there is a gap between the first part 15 and / or the second part 16 and the nut 5 along the first direction 001 or the opposite direction of the first direction 001. The control valve includes a nut 5 and a spring 6. The body part 1 includes a second space 14. The second space 14 and the guiding arm 41 are located on both sides of the first end 13. At least a part of the corresponding wall part of the second space 14 includes the wall part corresponding to the first end 13. At least a part of the nut 5 is limited to the second space 14. The spring 6 is located in the second space 14. The spring 6 is located between the nut 5 and the first end 13. Along the first direction 001 and the opposite direction of the first direction 001, one end of the spring 6 abuts against the nut 5, and the other end of the spring 6 abuts against the first end 13. Thus, the nut 5 is subjected to the elastic force of the spring 6 along the first direction 001, and the nut 5 abuts against the second part 16 located above the first part 15 along the first direction 001. There is a gap between at least a part of the nut 5 and the first part 15. During the process of the control valve changing from the open valve state to the closed valve state, when the control valve just reaches the closed state, the lead screw 7 can continue to rotate, and the nut 5 moves in the opposite direction of the first direction 001 until at least a part of the nut 5 abuts against the first part 15, which plays a buffering role in the rotation of the lead screw 7 when closing the valve. At the same time, due to the first end 13 being subjected to the elastic force of the spring 6 in the opposite direction of the first direction 001, the body part 1 and the hole wall part 22 are tightly abutted, making the control valve tightly closed when closing the valve and reducing the internal leakage situation.

[0044] In this embodiment, the guiding arm 41 is located on one side of the body part 1 along the opposite direction of the first direction 001. The number of the guiding arms 41 is at least 2. There is a first space 002 between the guiding arms 41. The valve cavity 3 includes an inlet cavity 31. When the control valve is in the open valve state, the first space 002 communicates with the inlet cavity. Compared with other embodiments, in this embodiment, when the control valve is in the open valve state, it is convenient for the fluid to flow from the inlet cavity 31, through the first space 002 and the valve hole 21 to the outlet cavity 32, and the flow rate is relatively large. For example, the guiding arm is annular, and the size of the annular guiding arm is adapted to the hole wall part. When the valve core part reaches the maximum open valve position, at least a part of the guiding part is located in the valve hole. When the control valve is in the open valve state, the fluid needs to flow from the inlet cavity through the gap between the guiding part and the hole wall part to the outlet cavity, and the flow rate is relatively small.

[0045] When the main body portion 1 is at the maximum valve opening position of the control valve, at least a part of the guiding arm 41 is located in the valve hole 21. At least a part of the guiding arm 41 is adapted to the corresponding hole wall portion 22 of the valve hole 21, and at least a part of the guiding arm 41 and the corresponding hole wall portion 22 of the valve hole 21 are in clearance fit.

[0046] Specifically, the guiding arm 41 includes a mating section 411 and a transition section 412. The transition section 412 is located between the main body portion 1 and the mating section 411. The mating section 411 is adapted to the hole wall portion 22. When the control valve is in the valve-closed state, the distance from the transition section 412 to the corresponding hole wall portion 22 gradually increases along the first direction 001.

[0047] For such a control valve, by the mating section 411 being adapted to the hole wall portion 22, when the control valve is in the closed state, the distance from the transition section 412 to the corresponding hole wall portion 22 gradually increases along the first direction 001, that is, the distance from the wall portion corresponding to at least a part of the guiding arm 41 to the corresponding hole wall portion 22 gradually increases along the first direction 001, avoiding the mating area between the mating section 411 and the corresponding hole wall portion 22 from being too large, and reducing the situation of the main body portion 1 colliding with or jamming with the hole wall portion 22 during the movement of the main body portion 1.

[0048] More specifically, the number of the mating sections 411 is at least 2. The mating sections 411 are circumferentially distributed along the axis corresponding to the main body portion 1. The clearance between the mating section 411 and the corresponding hole wall portion 22 is >0 mm and <1 mm. When the control valve is in the valve-closed state, the maximum distance between the transition section 412 and the corresponding hole wall portion 22 is in the range of 0.05 mm - 1 mm.

[0049] For such a control valve, by the mating sections 411 being circumferentially distributed along the axis corresponding to the main body portion 1, specifically, the mating sections 411 are circumferentially arrayed along the axis corresponding to the main body portion 1. Thus, the main body portion 1 is more stable during the movement, avoiding the guiding arm 41 from tilting radially, and reducing the situation of the main body portion 1 colliding with or jamming; the clearance between the mating section 411 and the corresponding hole wall portion 22 is >0 mm and <1 mm, and during the movement of the main body portion 1, the hole wall portion 22 limits the guiding arm 41 more stably; when the control valve is in the valve-closed state, the maximum distance between the transition section 412 and the corresponding hole wall portion 22 is in the range of 0.05 mm - 1 mm. Thus, the main body portion 1 moves more smoothly, reducing the situation of the hole wall portion 22 colliding with or jamming with the guiding arm 41.

[0050] In one embodiment, refer to Figures 7 - 9, along the opposite direction of the first direction 001, the body portion 1 has a first end portion 13. The first end portion 13 includes a first position 131 and a second position 132. The first position 131 is located on the outer peripheral side of the second position 132. The first position 131 is farther from the axis corresponding to the body portion 1 than the second position 132. The guiding portion 4 includes a connecting portion 42 and a guiding arm 41. The connecting portion 42 and the guiding arm 41 are of an integral structure. The connecting portion 42 is located between the guiding arm 41 and the first end portion 13. The connecting portion 42 is located at the first position 131. The guiding arm 41 includes a second end portion 413 and a third end portion 414. The third end portion 414 is farther from the connecting portion 42 than the second end portion 413 along the opposite direction of the first direction 001. The projection of the connecting portion 42 along the axis direction corresponding to the body portion 1 is larger than the projection of the second end portion 413.

[0051] It should be noted that: the connecting portion 42 is located at the first position 131. It can be that the connecting portion 42 and the first end portion 13 are limited or fixedly arranged, or the connecting portion 42 and the first end portion 13 are of an integral structure. If the connecting portion 42 and the first end portion 13 are limited or fixedly arranged, the "first position 131" refers to the connecting position of the connecting portion 42 on the first end portion 13; if the connecting portion 42 and the first end portion 13 are of an integral structure, the "first position 131" refers to the position on the first end portion 13 where the connecting portion 42 and the first end portion 13 are integrally connected.

[0052] Specifically, the connecting portion 42 and the first end portion 13 are limited or fixedly arranged. More specifically, the connecting portion 42 and the first end portion 13 can be fixedly welded.

[0053] For such a control valve, since the projection of the connecting portion 42 along the axis direction corresponding to the body portion 1 is larger than the projection of the second end portion 413, compared with other solutions, the contact area between the guiding portion 4 and the first end portion 13 in this embodiment is larger, and the limitation or fixation is more firm. For example, if the guiding arm 41 extending along the opposite direction of the first direction 001 is directly fixed to the first end portion 13, the contact area is smaller and it is easy to fall off.

[0054] More specifically, the connecting portion 42 is annular, and the outer diameter dimension of the connecting portion 42 is adapted to the outer shape dimension of the first end portion 13, which is beneficial to the concentric setting of the guiding portion 4 and the body portion 1 and is beneficial to the more stable cooperation between the guiding arm 41 and the wall portion 22 of the valve hole 21.

[0055] At least a part of the nut 5 is limited to the valve core part 01. Specifically, the main body part 1 includes a first part 15 and a second part 16. The second part 16 is located above the first part 15 along the first direction 001. The first part 15 and the second part 16 are of a split structure and are connected in a limited way. Specifically, the first part 15 and the second part 16 are fixedly connected. More specifically, the first part 15 and the second part 16 are fixedly connected by welding, making the fixation more firm. At least a part of the nut 5 is limited between the first part 15 and the second part 16, and there is a gap between the first part 15 and / or the second part 16 and the nut 5 along the first direction 001 or the opposite direction of the first direction 001. The control valve includes a nut 5 and a spring 6. The main body part 1 includes a second space 14. The second space 14 and the guiding arm 41 are located on both sides of the first end 13. At least a part of the corresponding wall part of the second space 14 includes the wall part corresponding to the first end 13. At least a part of the nut 5 is limited to the second space 14. The spring 6 is located in the second space 14. Along the first direction 001 or the opposite direction of the first direction 001, one end of the spring 6 abuts against the nut 5, and the other end of the spring 6 abuts against the first end 13. Thus, the nut 5 is subjected to the elastic force of the spring 6 along the first direction 001, and the nut 5 abuts against the second part 16 located above the first part 15 along the first direction 001. There is a gap between at least a part of the nut 5 and the first part 15. During the process of the control valve changing from the open valve state to the closed valve state, when the control valve just reaches the closed state, the lead screw 7 can continue to rotate, and the nut 5 moves in the opposite direction of the first direction 001 until at least a part of the nut 5 abuts against the first part 15, which buffers the rotation of the lead screw 7 during valve closing. At the same time, due to the first end 13 being subjected to the elastic force of the spring 6 in the opposite direction of the first direction 001, the main body part 1 and the hole wall part 22 are tightly abutted, making the control valve tightly closed during valve closing and reducing the internal leakage situation.

[0056] In this embodiment, the guiding arm 41 is located on one side of the main body part 1 along the opposite direction of the first direction 001. The number of the guiding arms 41 is at least 2. There is a first space 002 between the guiding arms 41. The valve cavity includes an inlet cavity. When the control valve is in the open valve state, the first space 002 communicates with the inlet cavity. Compared with other embodiments, in this embodiment, when the control valve is in the open valve state, it is convenient for the fluid to flow from the inlet cavity 31, through the first space 002 and the valve hole 21 to the outlet cavity 32, and the flow rate is relatively large. For example, the guiding arm is annular, and the size of the annular guiding arm is adapted to the hole wall part. When the valve core part reaches the maximum open valve position, at least a part of the guiding part is located in the valve hole. When the control valve is in the open valve state, the fluid needs to flow from the inlet cavity through the gap between the guiding part and the hole wall part to the outlet cavity, and the flow rate is relatively small.

[0057] When the main body portion 1 is at the maximum valve opening position of the control valve, at least a part of the guiding arm 41 is located in the valve hole 21. At least a part of the guiding arm 41 is adapted to the corresponding hole wall portion 22 of the valve hole 21, and at least a part of the guiding arm 41 and the corresponding hole wall portion 22 of the valve hole 21 are in clearance fit.

[0058] Specifically, the guiding arm 41 includes a fitting section 411 and a transition section 412. The transition section 412 is located between the main body portion 1 and the fitting section 411. The fitting section 411 is adapted to the hole wall portion 22. When the control valve is in the closed valve state, the distance from the transition section 412 to the corresponding hole wall portion 22 gradually increases along the first direction 001.

[0059] For such a control valve, by adapting the fitting section 411 to the hole wall portion 22, when the control valve is in the closed state, the distance from the transition section 412 to the corresponding hole wall portion 22 gradually increases along the first direction 001, that is, the distance from the wall portion corresponding to at least a part of the guiding arm 41 to the corresponding hole wall portion 22 gradually increases along the first direction 001, avoiding the situation that the fitting area between the fitting section 411 and the corresponding hole wall portion 22 is too large, and reducing the situation that the main body portion 1 collides with or jams with the hole wall portion 22 during the movement of the main body portion 1.

[0060] More specifically, the number of the fitting sections 411 is at least 2. The fitting sections 411 are circumferentially distributed along the axis corresponding to the main body portion 1. The clearance between the fitting section 411 and the corresponding hole wall portion 22 is > 0 mm and < 1 mm. When the control valve is in the closed valve state, the maximum distance between the transition section 412 and the corresponding hole wall portion 22 is in the range of 0.05 mm - 1 mm.

[0061] For such a control valve, by the circumferential distribution of the fitting sections 411 along the axis corresponding to the main body portion 1, specifically, the fitting sections 411 are circumferentially arrayed along the axis corresponding to the main body portion 1. In this way, the main body portion 1 is more stable during the movement, avoiding the guiding arm 41 tilting radially, and reducing the situation that the main body portion 1 collides with or jams; the clearance between the fitting section 411 and the corresponding hole wall portion 22 is > 0 mm and < 1 mm, and during the movement of the main body portion 1, the hole wall portion 22 limits the guiding arm 41 more stably; when the control valve is in the closed valve state, the maximum distance between the transition section 412 and the corresponding hole wall portion 22 is in the range of 0.05 mm - 1 mm. In this way, the movement of the main body portion 1 is smoother, and the situation that the hole wall portion 22 and the guiding arm 41 collide with or jam is reduced.

[0062] In one embodiment, refer to Figures 10 - 12, the main body portion 1 includes a first hole 12 extending along the axis corresponding to the main body portion 1. In the opposite direction of the first direction 001, the main body portion 1 has a first end portion 13. The guiding portion 4 includes a connecting portion 42 and a guiding arm 41. The connecting portion 42 is located between the first end portion 13 and the guiding arm 41. The guiding arm 41 includes a second end portion 413 and a third end portion 414. The third end portion 414 is away from the connecting portion 42 in the opposite direction of the first direction 001 relative to the second end portion 413. The projection of the connecting portion 42 along the axis direction corresponding to the main body portion 1 is larger than the projection of the second end portion 413. In this embodiment, the guiding arm and the connecting portion may be an integral structure. The guiding portion 4 and the main body portion 1 are limited or fixedly arranged, which is convenient for the processing of the guiding portion 4. Compared with directly limiting the guiding arm 41 to the first end portion 13, limiting or fixing the connecting portion 42 to the first end portion 13 makes the fixation between the guiding portion 4 and the main body portion 1 more firm. More specifically, the connecting portion 42 is annular, and the outer diameter dimension of the connecting portion 42 is adapted to the outer shape dimension of the first end portion 13, which is beneficial to the concentric setting of the guiding portion 4 and the main body portion 1 and makes the cooperation between the guiding arm 41 and the wall portion 22 of the valve hole 21 more stable.

[0063] At least a part of the nut 5 is limited to the valve core part 01. Specifically, the body part 1 includes a first part 15 and a second part 16. The second part 16 is located above the first part 15 along the first direction 001. The first part 15 and the second part 16 are of a split structure and are connected in a limited way. Specifically, the first part 15 and the second part 16 are fixedly connected. More specifically, the first part 15 and the second part 16 are fixedly connected by welding, making the fixation more firm. At least a part of the nut 5 is limited between the first part 15 and the second part 16, and there is a gap between the first part 15 and / or the second part 16 and the nut 5 along the first direction 001 or the opposite direction of the first direction 001. At least a part of the projection of the connecting part 42 along the axis direction corresponding to the body part 1 is located in the first hole 12. The control valve includes a nut 5 and a spring 6. At least a part of the nut 5 is limited to the first hole 12. The spring 6 is located in the first hole 12. Along the first direction 001 or the opposite direction of the first direction 001, one end of the spring 6 abuts against the nut 5, and the other end of the spring 6 abuts against the connecting part 42. Thus, the nut 5 is subjected to the elastic force of the spring 6 along the first direction 001, and the nut 5 abuts against the second part 16 located above the first part 15 along the first direction 001. There is a gap between at least a part of the nut 5 and the first part 15. During the process of the control valve changing from the open valve state to the closed valve state, when the control valve just reaches the closed state, the lead screw 7 can continue to rotate, and the nut 5 moves in the opposite direction of the first direction 001 until at least a part of the nut 5 abuts against the first part 15, which plays a buffering role in the rotation of the lead screw 7 when closing the valve. At the same time, under the action of the elastic force of the first end 13 along the opposite direction of the first direction 001 of the spring 6, the body part 1 abuts tightly against the hole wall part 22, making the control valve close tightly and reducing the internal leakage situation.

[0064] In this embodiment, the guiding arm 41 is located on one side of the body part 1 along the opposite direction of the first direction 001. The number of guiding arms 41 is at least 2. There is a first space 002 between the guiding arms. The valve cavity includes an inlet cavity. When the control valve is in the open valve state, the first space 002 communicates with the inlet cavity. Compared with other embodiments, in this embodiment, when the control valve is in the open valve state, it is convenient for the fluid to flow from the inlet cavity 31, through the first space 002 and the valve hole 21 to the outlet cavity 32, and the flow rate is relatively large. For example, the guiding arm is annular, and the size of the annular guiding arm is adapted to the hole wall part. When the valve core part reaches the maximum open valve position, at least a part of the guiding part is located in the valve hole. When the control valve is in the open valve state, the fluid needs to flow from the inlet cavity through the gap between the guiding part and the hole wall part to the outlet cavity, and the flow rate is relatively small.

[0065] When the main body portion 1 is at the maximum valve opening position of the control valve, at least part of the guiding arm 41 is located in the valve hole 21. At least part of the guiding arm 41 is adapted to the corresponding hole wall portion 22 of the valve hole 21, and at least part of the guiding arm 41 and the corresponding hole wall portion 22 of the valve hole 21 are in clearance fit.

[0066] Specifically, the guiding arm 41 includes a mating section 411 and a transition section 412. The transition section 412 is located between the main body portion 1 and the mating section 411. The mating section 411 is adapted to the hole wall portion 22. When the control valve is in the valve-closed state, the distance from the transition section 412 to the corresponding hole wall portion 22 gradually increases along the first direction 001.

[0067] For such a control valve, by adapting the mating section 411 to the hole wall portion 22, when the control valve is in the closed state, the distance from the transition section 412 to the corresponding hole wall portion 22 gradually increases along the first direction 001, that is, the distance from the wall portion corresponding to at least part of the guiding arm 41 to the corresponding hole wall portion 22 gradually increases along the first direction 001, avoiding the excessive mating area between the mating section 411 and the corresponding hole wall portion 22, and reducing the situation of impact or jamming between the main body portion 1 and the hole wall portion 22 during the movement of the main body portion 1.

[0068] More specifically, the number of the mating sections 411 is at least 2. The mating sections 411 are circumferentially distributed along the axis corresponding to the main body portion 1. The clearance between the mating section 411 and the corresponding hole wall portion 22 is >0 mm and <1 mm. When the control valve is in the valve-closed state, the maximum distance between the transition section 412 and the corresponding hole wall portion 22 is in the range of 0.05 mm - 1 mm.

[0069] For such a control valve, by the circumferential distribution of the mating sections 411 along the axis corresponding to the main body portion 1, specifically, the mating sections 411 are circumferentially arrayed along the axis corresponding to the main body portion 1. Thus, the main body portion 1 is more stable during movement, avoiding the guiding arm 41 tilting radially, and reducing the situation of impact or jamming of the main body portion 1; the clearance between the mating section 411 and the corresponding hole wall portion 22 is >0 mm and <1 mm, and during the movement of the main body portion 1, the hole wall portion 22 limits the guiding arm 41 more stably; when the control valve is in the valve-closed state, the maximum distance between the transition section 412 and the corresponding hole wall portion 22 is in the range of 0.05 mm - 1 mm. Thus, the main body portion 1 moves more smoothly, reducing the situation of impact or jamming between the hole wall portion 22 and the guiding arm 41.

[0070] It should be noted that: Although this specification has described the present invention in detail with reference to the above-mentioned embodiments, those of ordinary skill in the art should understand that those skilled in the art 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 (01) and a valve hole part (2), the control valve comprising a valve cavity (3), the valve core part (1) being located in the valve cavity (3). Characterized in that the valve core part (01) comprises a guiding part (4) and a body part (1), the guiding part (4) is limited or fixedly arranged with the body part (1) or the guiding part (4) and the body part (1) are of an integral structure, the valve hole part (2) comprises a valve hole (21), when the valve core part (01) is located at the maximum valve opening position of the control valve, at least part of the guiding part (4) is located in the valve hole (21), and at least part of the guiding part (4) is in clearance fit with the corresponding hole wall part (22) of the valve hole (21).

2. The control valve according to claim 1 Characterized in that during the process of the control valve from the valve closed state to the valve open state, the moving direction of the body part (1) is defined as the first direction (001), the guiding part (4) has a guiding arm (41), the guiding arm (41) is located on one side of the body part (1) along the opposite direction of the first direction (001), there is a first space (002) between at least part of the guiding arm (41) and the hole wall part (22) or the number of guiding arms is at least 2, and there is a first space (002) between each of the guiding arms (41); the valve cavity (3) comprises an inlet cavity (31), when the control valve is in the valve open state, the first space (002) communicates with the inlet cavity (31).

3. The control valve according to claim 2 Characterized in that the guiding arm (41) comprises a matching section (411) and a transition section (412), the transition section (412) is located between the body part (1) and the matching section (411), the matching section (411) is adapted to the hole wall part (22), when the control valve is in the closed state, the distance from the transition section (412) to the corresponding hole wall part (22) gradually increases along the first direction (001).

4. The control valve according to claim 3 Characterized in that the number of the matching sections (411) is at least 2, the matching sections (411) are circumferentially distributed along the axis corresponding to the body part (1), the clearance between the matching section (411) and the corresponding hole wall part (22) > 0 mm and < 1 mm, and when the control valve is in the closed state, the maximum distance between the transition section (412) and the corresponding hole wall part (22) is in the range of 0.05 mm - 1 mm.

5. The control valve according to any one of claims 2 - 4 Characterized in that the body part (1) has a first end (11) along the opposite direction of the first direction (001), the guiding arm (41) is located at the first end (11), the body part (1) comprises a first hole (12) extending along the first direction (001), and along the axis direction corresponding to the body part (1), at least part of the projection of the guiding arm (41) is located in the first hole (12).

6. The control valve according to claim 5, wherein, the number of the guiding arms (41) is at least two, each guiding arm (41) extends radially along the first hole (12), and the guiding arms (41) intersect at the axis corresponding to the first hole (12). The control valve includes a nut (5) and a spring (6). At least a part of the nut (5) is located in the first hole (12), the spring (6) is located in the first hole (12), and the spring (6) is located between the nut (5) and the guiding arm (41). Along the first direction 001 and the opposite direction of the first direction (001), one end of the spring (6) abuts against the nut (5), and the other end of the spring (6) abuts against the guiding arm (41).

7. The control valve according to any one of claims 2-4, wherein, along the opposite direction of the first direction (001), the body part (1) has a first end (13), the first end includes a first position (131) and a second position (132), the first position (131) is located on the outer peripheral side of the second position (132), the first position (131) is farther from the axis corresponding to the body part (1) than the second position (132), the guiding arm (41) is located at the first position (131), the guiding arm (41) includes a second end (413) and a third end (414), and the third end (414) is farther from the first end (13) than the second end (413) along the opposite direction of the first direction (001).

8. The control valve according to any one of claims 2-4, wherein, along the opposite direction of the first direction (001), the body part (1) has a first end (13), the first end includes a first position (131) and a second position (132), the first position (131) is located on the outer peripheral side of the second position (132), the first position (131) is farther from the axis corresponding to the body part (1) than the second position (132), the guiding part (4) includes a connecting part (42) and a guiding arm (41), the connecting part (42) and the guiding arm (41) are of an integral structure, the connecting part (42) is located between the guiding arm (41) and the first end (13), the connecting part (42) is located at the first position (131), the guiding arm (41) includes a second end (413) and a third end (414), the third end (414) is farther from the connecting part (42) than the second end along the opposite direction of the first direction (001), and the projection of the connecting part (42) along the axis direction of the body part (1) is larger than the projection of the second end (413).

9. The control valve according to any one of claims 7 or 8, wherein, The control valve includes a nut (5) and a spring (6). The body portion (1) includes a second space (14). The second space (14) and the guiding arm (41) are located on both sides of the first end portion (13). At least a part of the wall portion corresponding to the second space (14) includes the wall portion corresponding to the first end portion (13). At least a part of the nut (5) is located in the second space (14). The spring (6) is located in the second space (14). The spring (6) is located between the nut (5) and the first end portion (13). Along the first direction (001) and the opposite direction of the first direction (001), one end portion of the spring (6) abuts against the nut (5), and the other end portion of the spring (6) abuts against the first end portion (13).

10. The control valve according to claim 5, wherein, the body portion (1) includes a first hole (12) extending along the axial direction corresponding to the body portion (1). Along the opposite direction of the first direction (001), the body portion (1) has a first end portion (13). The guiding portion (4) includes a connecting portion (42) and a guiding arm (41). The connecting portion (42) is located between the first end portion (13) and the guiding arm (41). The guiding arm (41) includes a second end portion (413) and a third end portion (414). The third end portion (414) is away from the connecting portion (42) along the opposite direction of the first direction (001) relative to the second end portion (413). The projection of the connecting portion (42) along the axial direction corresponding to the body portion (1) is larger than the projection of the second end portion (413); at least a part of the projection of the connecting portion (42) along the axial direction corresponding to the body portion (1) is located in the first hole (12); the control valve includes a nut (5) and a spring (6). At least a part of the nut (5) is limited in the first hole (12). The spring (6) is located in the first hole (12). Along the first direction (001) and the opposite direction of the first direction (001), one end portion of the spring (6) abuts against the nut (5), and the other end portion of the spring (6) abuts against the connecting portion (42).

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