Control valve

Abstract

The invention relates to the field of fluid adjustment, in particular to a control valve which comprises a valve body part, a first valve element assembly and a second valve element assembly, the valve body part comprises a valve cavity, the first valve element assembly and the second valve element assembly are located in the valve cavity, the valve body part comprises a valve seat, the valve seat is provided with at least one first valve hole part and at least one second valve hole part, the first valve hole part comprises a first valve hole, and the second valve hole part comprises a second valve hole. The second valve hole part comprises a second valve hole, and the axis of the first valve hole is parallel to the axis of the second valve hole; the first valve element assembly comprises at least one first valve element, the second valve element assembly comprises a second valve element, the first valve element is matched with the first valve hole, and the second valve element is matched with the second valve hole; the first valve element assembly and the second valve element assembly can move relatively in the axial direction of the control valve, when the control valve works, the first valve element and the second valve element can be mutually limited in the radial direction, eccentric movement of the valve elements due to impact of high-pressure fluid is reduced, then impact of the valve elements on a valve port can be reduced, and abrasion of the valve port is reduced.

Description

Technical Field

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

Background Art

[0002] When the control valve is working, the valve core will move axially with the rotation of the lead screw. At the moment of opening or closing the valve, the valve core may impact the valve port due to the impact of high-pressure fluid, resulting in wear of the valve port. Therefore, how to provide a solution to overcome the above defects is still a technical problem that those skilled in the art need to solve urgently.

Summary of the Invention

[0003] The present invention provides a control valve to solve the above problems, and the specific technical solution is as follows:

[0004] A control valve, the control valve includes a valve body part, a first valve core assembly, and a second valve core assembly. The valve body part includes a valve cavity. The first valve core assembly and the second valve core assembly are located in the valve cavity. It is characterized in that: the valve body part includes a valve seat, the valve seat has at least one first valve hole part and a second valve hole part. The first valve hole part includes a first valve hole, the second valve hole part includes a second valve hole, and the axis of the first valve hole is parallel to the axis of the second valve hole;

[0005] The first valve core assembly includes at least one first valve core, the second valve core assembly includes a second valve core. The first valve core cooperates with the first valve hole, and the second valve core cooperates with the second valve hole; the first valve core assembly and the second valve core assembly can move relative to each other along the axis of the control valve.

[0006] The beneficial effect of the control valve provided by this solution is that by arranging both the first valve port and the second valve port on the valve seat, when the control valve is working, the first valve core and the second valve core can limit each other radially, reducing the eccentric movement of the valve core caused by the impact of high-pressure fluid, thereby reducing the impact of the valve core on the valve port and reducing the wear of the valve port.

Description of the Drawings

[0007] Figure 1 It is a schematic cross-sectional view of a control valve for an embodiment;

[0008] Figure 2 It is a partial schematic view of a control valve - in the fully open state for an embodiment;

[0009] Figure 3 It is a partial schematic view of a control valve - in the closed state for the first embodiment;

[0010] Figure 4 For Figure 3 Partial enlarged view of;

[0011] Figure 5 Partial schematic diagram of the control valve in the second embodiment - closed state;

[0012] Figure 6 is Figure 5 partial enlarged view of

[0013] Figure 7 Partial schematic diagram of a control valve in a first embodiment - flow regulation state 1;

[0014] Figure 8 Partial schematic diagram of a control valve in a first embodiment - flow regulation state 2;

[0015] Figure 9 Projection sketch of the first embodiment of the valve seat;

[0016] Figure 10 Projection sketch of the second embodiment of the valve seat;

[0017] Reference numerals:

[0018] 100, control valve; 1, valve cavity; 2, valve body part; 3, first spool assembly; 31, first spool; 32, first main body part; 4, second spool assembly; 41, second spool; 42, second main body part; 22, valve body; 23, valve seat; 231, first valve hole part; 2311, first valve port; 2312, first valve hole; 232, second valve hole part; 2321, second valve port; 2322, second valve hole; 322, first end face; 3221, accommodation groove; 311, first end; 2313, flow regulation surface; 5, sealing part; 51, sealing surface; 6, driving assembly; 61, driving part; 62, nut; 63, lead screw; 7, sealing assembly; 71, first seal; 72, second seal; 23111, guide groove; 001, first direction; 002, second direction;

[0019] 8, elastic part assembly; 81, first elastic part; 82, second elastic part; 9, first limiting part; 10, second limiting part; 11, inlet cavity; 12, outlet cavity; 13, balance cavity; 14, through hole; 15, rotating part; 411, protruding part; 412, main body part; 321, first accommodation space; 421, second accommodation space; 422, first fitting part; 423, second fitting part; 424, bottom wall; 20, seal;

Detailed implementation manners

[0020] Next, the technical solutions in the present application will be clearly and completely described in conjunction with the accompanying drawings of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0021] The control valve includes an inlet cavity 11 and an outlet cavity 12. When the control valve is working, high-pressure fluid flows into the inlet cavity 11. At the moment of opening and closing the valve, the high-pressure fluid will have a great impact on the valve core. At this time, the valve core is likely to generate eccentric movement, resulting in the phenomenon that the valve core impacts the valve port, causing wear of the valve port. Over time, the control valve will leak. To solve the above problems, a control valve 100 is provided, and the specific technical solution is as follows:

[0022] The control valve 100 includes a valve body part 2, a first valve core assembly 3, and a second valve core assembly 4. The valve body part 2 includes a valve cavity 1. The first valve core assembly 3 and the second valve core assembly 4 are located in the valve cavity 1. The first valve core assembly 3 includes at least one first valve core 31 and a first main body part 32. The first valve core 31 and the first main body part 32 are of an integral structure. The second valve core assembly 4 includes a second valve core 41 and a second main body part 42. The second valve core 41 and the second main body part 42 are separate parts. The second valve core 41 includes a body part 412 and a protruding part 411. The body part 412 and the protruding part 411 are fixedly connected. The protruding part 411 is arranged at the end of the body part 412 away from the valve seat 23. The second main body part 42 has a second accommodation space 421. The protruding part 411 is axially movably arranged in the second accommodation space 421. The first main body part 32 has a first accommodation space 321. The second main body part 42 is axially movably limited in the first accommodation space 321. The valve body part 2 includes a valve seat 23. The valve seat 23 has at least one first valve hole part 231 and a second valve hole part 232. The first valve hole part 231 includes a first valve hole 2312. The second valve hole part 232 includes a second valve hole 2322. The axis of the first valve hole 2312 is parallel to the axis of the second valve hole 2322. The first valve core 31 cooperates with the first valve hole 2312. The second valve core 41 cooperates with the second valve hole 2322. The cooperation mode between the first valve core 31 and the first valve hole 2312 can be the sealing cooperation in the following embodiments, such as setting a sealing part 5. It can also be an interference fit, and then a sealing member 20 is set for sealing. The cooperation mode between the second valve core 41 and the second valve hole 2322 can also adopt the same method, which will not be elaborated here. It can also adopt the method shown in the drawings, that is, the second valve core 41 abuts against the second valve port 2321. The first valve core assembly 3 and the second valve core assembly 4 can move relative to each other axially along the control valve (100). With such a setting, when the control valve is working, the first valve core 31 and the second valve core 41 can radially limit each other, reducing the eccentric movement of the valve core caused by the impact of high-pressure fluid, and further reducing the impact of the valve core on the valve port and reducing the wear of the valve port.

[0023] Specifically, refer to the attached Figures 9 - 10, the first valve hole portion 231 includes a first valve hole 2312, the second valve hole portion 232 includes a second valve hole 2322, and the axis of the first valve hole 2312 is parallel to the axis of the second valve hole 2322. Such a setting can ensure the coaxiality of the first valve hole 2312 and the second valve hole 2322 as much as possible. When the first valve core 31 and the second valve core 41 are respectively matched with them, eccentric movement is not likely to occur. Preferably, the central axis of the second valve hole portion 232 coincides with the central axis of the control valve 100. In addition, the number of the first valve hole portions 231 provided on the valve seat 23 of the control valve 100 is determined by the flow rate required by the control valve 100. The specific number can be 1, 2, 3, 4... n, where n is a positive integer. Preferably, the number of the first valve hole portions 231 is an even number and is evenly spaced on the outer circumference of the second valve hole portion 232. Such a setting not only facilitates the machining of the valve seat 23, but also when the control valve 100 is working, the impact force brought by the fluid to the control valve 100 itself will be relatively reduced. Because of the even number of the first valve hole portions 231 evenly arranged, when the fluid flows through, the impact forces received can be balanced and offset each other. In this way, the control valve 100 can be relatively more reliable and stable in the working environment.

[0024] The control valve 100 at least has a closed state, a flow rate adjustment state, and a fully open state. Now, several working states of the control valve 100 and the switching between them will be introduced as follows:

[0025] The control valve 100 includes a driving assembly 6, and the driving assembly 6 includes a driving part 61, a nut 62, and a lead screw 63; at least part of the driving part 61 is located in the valve cavity 1, the nut 62 and the lead screw 63 are located in the valve cavity 1, the nut 62 and the valve body part 2 are in limit fit, the lead screw 63 and the nut 62 are in threaded fit, the lead screw 63 and the second spool assembly 4 are in limit connection, the driving part 61 drives the lead screw 63 to move along the axial direction of the control valve 100, the lead screw 63 can rotate and move along the axial direction of the control valve 100 at the same time, while the lead screw 63 rotates and moves axially, it drives the second spool assembly 4 to move along the axial direction of the control valve 100, and the second spool assembly 4 drives the first spool assembly 3 to move along the axial direction of the control valve 100. Specifically, the control valve 100 includes a first limiting part 9 and a second limiting part 10, the first limiting part 9 and the second limiting part 10 are arranged at both ends of the first accommodating space 321, the first limiting part 9 is sleeved on the end of the second main body part 42 away from the valve seat 23, the second main body part 42 can move axially relative to it, at least part of the outer wall of the first limiting part 9 is fixedly connected with at least part of the inner wall of the first main body part 32; the second limiting part 10 protrudes from the bottom wall 424 of the first accommodating space 321, and the second limiting part 10 is fixedly connected with the first main body part 32; define the direction in which the lead screw 63 moves towards the valve seat 23 as the first direction 001, and the direction in which the lead screw 63 moves away from the valve seat 23 as the second direction 002; the second direction 002 can also be called the reverse direction of the first direction 001. When the second spool assembly 4 moves to the first position along the first direction 001, the second main body part 42 abuts against the second limiting part 10 and drives the first spool assembly 3 to move along the first direction 001; when the second spool assembly 4 moves to the second position along the second direction 002, the second main body part 42 abuts against the first limiting part 9 and drives the first spool assembly 3 to move along the second direction 002. Here, the first position and the second position need to be explained. The first position means that after the second spool 41 blocks the second valve hole 2322, the second main body part 42 is driven by the lead screw 63 to continue moving along the first direction 001, and then abuts against the second limiting part 10; the second position means that after the second spool 41 moves away from the second valve hole 2322 along the second direction 002, the second main body part 32 is driven to continue moving along the second direction 002, and then abuts against the first limiting part 9.

[0026] The screw rod 63 rotates and moves axially while driving the second valve core assembly 4 to move axially along the control valve 100. Specifically, the control valve 100 also includes a rotating member 15, which is limitedly sleeved on the outer side of an end portion of the screw rod 63 relatively close to the valve seat 23. The rotating member 15 here can be a bearing; the second main body portion 42 includes a first matching portion 422 and a second matching portion 423, the first matching portion 422 is located on the outer wall of the second main body portion 42, and the second matching portion 423 is located on the inner wall of the second main body portion 42; the first matching portion 422 is limitedly matched with at least part of the inner wall of the first main body portion 31; at least part of the outer wall of the rotating member 15 is fixedly matched with the second matching portion 423; the control valve 100 also includes an elastic member assembly 8, which is located in the second accommodating space 421 of the second main body portion 42, and the elastic member assembly 8 includes a first elastic member 81 and a second elastic member 82, and the first elastic member 81 is located on the inner side of the second elastic member 82. The rotating member 15 is limitedly sleeved on an end portion of the screw rod 63 relatively close to the valve seat 23. When the screw rod 63 rotates and moves axially, it carries the rotating member 15 to move linearly along the axial direction of the control valve 100. The end face of the end portion of the screw rod 63 close to the valve seat 23 abuts against the end portion of the first elastic member 81 away from the valve seat 23, and the end face of the rotating member 15 facing the valve seat 23 abuts against the end portion of the second elastic member 82 away from the valve seat 23. The second valve core 41 includes a main body portion 412 and a protrusion 411, the main body portion 412 and the protrusion 411 are fixedly connected, the protrusion 411 is arranged at the end of the main body portion 412 away from the valve seat 23, the protrusion 411 is axially movable and limited in the second accommodating space 421, the end face of the end of the first elastic member 81 close to the valve seat 23 abuts against the protrusion 411; the end face of the end of the second elastic member 82 close to the valve seat 23 abuts against the bottom wall 424 of the second main body portion 42.

[0027] The control valve 100 has at least a closed state, a flow regulating state and a fully open state, etc.; wherein, in the closed state of the control valve 100, at least a portion of the second valve core 41 is inserted into the second valve port 2321 to block the second valve port 2321, and at least a portion of the first valve core 31 is inserted into the first valve port 2311 to block the first valve port 2311; in the flow regulating state of the control valve 100, at least a portion of the first valve core 31 is inserted into the first valve port 2311 to block the first valve port 2311, and the second valve core 41 is axially movably arranged to adjust the opening of the second valve port 2321; in the fully open state of the control valve 100, the first valve core 31 is away from the first valve port 2311, or it can be said to avoid the first valve port 2311.

[0028] See attached Figure 2, when the control valve 100 is in the fully open state, the first valve core 31 is away from the first valve port 2311, or it can be said to avoid the first valve port 2311, to ensure that the fluid in the control valve 100 flows from the inlet cavity 11 to the outlet cavity 12; the second valve core 41 avoids the second valve port 2321. When the lead screw 63 moves along the first direction 001, the lead screw 63 drives the rotating member 15 to move along the first direction 001 as well: Among them, the end face of the end of the lead screw 63 sleeving the rotating member 15 abuts against the end face of the first elastic member 81 away from the valve seat 23. As the lead screw 63 moves along the first direction 001, it squeezes the first elastic member 81, and the first elastic member 81 generates an elastic force, which acts on the protruding portion 411 of the second valve core 41, thereby driving the second valve core 41 to move along the first direction 001 toward the second valve port 2321. When the second valve core 41 abuts against the second valve port 2321, the second valve port 2321 can be blocked; in addition, the end face of the rotating member 15 facing the valve seat 23 contacts the end face of the second elastic member 82 away from the valve seat 23. As the lead screw 63 moves, the rotating member 15 also follows the lead screw 63 to move along the first direction 001. The rotating member 15 squeezes the second elastic member 82, and the second elastic member 82 generates an elastic force, which acts on the bottom wall 424 of the second main body portion 42, thereby driving the second main body portion 42 to move along the first direction 001 toward the valve seat 23. The second main body portion 42 moves to abut against the first position and the second limiting portion 10, and drives the first valve core assembly 3 to move along the first direction 001. The first valve core 31 moves along the first direction 001 toward the first valve port 2311. When it abuts against the first valve port 2311, the first valve port 2311 can be blocked; refer to Figures 3 - 6 , at this time, the control valve 100 is in the closed state. In the closed state, at least part of the first valve core 31 is inserted into the first valve port 2311 to block the first valve port 2311; at least part of the second valve core 41 is inserted into the second valve port 2321 to block the second valve port 2321. The second valve port 2321 has a flow regulating surface 2313, and the flow regulating surface 2313 is a conical surface. Along the first direction 001, the flow cross-sectional area of the flow regulating surface 2313 gradually decreases. This is beneficial to improving the sealing performance between the second valve core 41 and the second valve port 2321 and reducing the risk of leakage.

[0029] When the control system controls the control valve 100 to adjust the flow rate, when the control valve 100 is in the flow rate adjustment state at this time, the second valve core 41 is axially movably arranged to adjust the opening degree of the second valve port 2321. Specifically, refer to the appendix Figures 7 - 8, the lead screw 63 moves away from the valve seat 23 along the second direction 002, that is, moves in the reverse direction of the first direction 001. The lead screw 63 drives the second main body 42 to move along the second direction 002 through the rotating member 15. The bottom wall 424 of the second main body 42 abuts against the protruding portion 411, and drives the second valve core 41 to move away from the second valve port 2321 along the second direction 002. As the second valve core 41 moves, the opening degree of the second valve port 2321 gradually increases. On the contrary, when the second valve core 41 moves towards the valve seat 23 along the first direction 001, as the second valve core 41 moves, the opening degree of the second valve port 2321 gradually decreases until the second valve port 2321 is closed.

[0030] When the control system controls the control valve 100 to open the valve, as the lead screw 63 moves along the second direction 002, the second valve core assembly 4 also moves along the second direction 002. When the second main body 42 moves to the second position and abuts against the first limiting portion 9, the second valve core assembly 4 drives the first valve core assembly 3 to move along the second direction 002. As the first valve core assembly 3 moves along the second direction 002, the first valve core 31 moves along the second direction 002 and gradually moves away from the first valve port 2311 until the control valve 100 is in the fully open state. Refer to the appendix Figure 2 , when the control valve 100 is in the fully open state, the first valve core 31 moves away from the first valve port 2311, which can also be said to avoid the first valve port 2311, to ensure that the fluid in the control valve 100 flows from the inlet cavity 11 to the outlet cavity 12; the second valve core 41 avoids the second valve port 2321.

[0031] In summary, the control valve 100 has a closed state, a flow regulation state, and a fully open state, and there may be other states, which will not be described in detail here.

[0032] Furthermore, in order to reduce the impact of the high-pressure fluid on the valve port caused by the impact of the valve core, the wear of the valve port can be reduced. At the same time, in order to improve the sealing performance of the control valve and reduce the leakage risk. The valve seat 23 is in sealing cooperation with the first valve core 31. The first valve core 31 is at least partially located in the first valve hole 2312, and the first valve core 31 can axially move relative to the first valve hole 2312.

[0033] In order to further improve the sealing performance of the control valve 100 and prevent leakage between the first valve core 31 and the valve seat 23, a sealing portion is provided between the valve seat 23 and the first valve core 31. In the closed state or the flow regulation state, the sealing portion 5 combines with the first valve core 31 to block the first valve hole 2312. The material of the sealing portion 5 is a non-metallic material; the sealing portion 5 is provided on at least a part of the inner wall surface of the first valve hole 2312.

[0034] Specifically, refer to the appendix Figures 5 - 6, the first embodiment of the sealing portion, the sealing portion 5 is disposed on at least a part of the inner wall surface of the first valve hole 2312. The material of the sealing portion 5 is a non-metallic material, which can be polytetrafluoroethylene. The sealing portion 5 can be attached, coated, etc. The sealing portion 5 and the outer wall surface of the first valve core 31 form a sealing structure to better improve the sealing performance of the electric valve.

[0035] Refer to Figure 1 , the second embodiment of the sealing portion 5. The material of the valve seat 23 is a non-metallic material, which can be polytetrafluoroethylene. At least a part of the inner wall surface of the first valve hole 2312 forms the sealing portion 5. At least a part of the inner wall surface of the first valve hole 2312 and at least a part of the outer wall surface of the first valve core 31 form a sealing structure to better improve the sealing performance of the electric valve.

[0036] There can also be a third embodiment of the sealing portion 5. At least a part of the first valve core 31 is made of a non-metallic material, which can be polytetrafluoroethylene. At least a part of the outer wall surface of the first valve core 31 forms the sealing portion 5. At least a part of the outer wall surface of the first valve core 31 and at least a part of the inner wall surface of the first valve hole 2312 form a sealing structure to better improve the sealing performance of the electric valve.

[0037] There can also be a fourth embodiment of the sealing portion 5, which can be a combination of the first embodiment and the third embodiment, or a combination of the second embodiment and the third embodiment.

[0038] To improve the sealing performance of the control valve, the following method can also be adopted: Refer to the appendix Figures 3 - 4 , the control valve 100 includes a sealing member 20. The first valve core 31 has a first end 311, and the first end 311 is away from the valve seat 23. The first end 311 is fixedly connected to the first main body portion 32. The first main body portion 32 includes a first end face 322. A receiving groove 3221 is provided at the end of the first main body portion 32 close to the valve seat 23. The receiving groove 3221 surrounds the first valve core 31 and extends along the second direction 002 from the first end face 322. At least a part of the sealing member 20 is located in the receiving groove 3221.

[0039] When the control valve 100 is in the closed state or the flow regulation state, the first valve core 31 is located in the first valve hole 2312. The first end face 322 is in contact and cooperation with the corresponding end face of the valve seat 23. The first valve port 2311 has a guiding groove 23111. The guiding groove 23111 and the receiving groove 3221 form a receiving space. At this time, the sealing member 20 is located in the receiving space formed by the receiving groove 3221 and the guiding groove 23111, so that better sealing can be achieved and the risk of fluid leakage can be reduced.

[0040] The cooperation and sealing methods between the second spool 41 and the second valve hole 2322 in this application can also adopt the cooperation and sealing methods between the first spool 31 and the second valve hole 2322, which will not be elaborated here.

[0041] 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 art can still modify, combine, or equivalently replace the present invention, and all technical solutions and 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 (100), the control valve (100) comprising a valve body portion (2), a first spool assembly (3), and a second spool assembly (4), the valve body portion (2) comprising a valve chamber (1), the first spool assembly (3) and the second spool assembly (4) being located in the valve chamber (1), characterized in that: The valve body part (2) includes a valve seat (23), and the valve seat (23) has at least one first valve hole part (231) and a second valve hole part (232). The first valve hole part (231) includes a first valve hole (2312), and the second valve hole part (232) includes a second valve hole (2322). The axis of the first valve hole (2312) is parallel to the axis of the second valve hole (2322). The first spool assembly (3) includes at least one first spool (31), and the second spool assembly (4) includes a second spool (41). The first spool (31) cooperates with the first valve hole (2312), and the second spool (41) cooperates with the second valve hole (2322). The first spool assembly (3) and the second spool assembly (4) can move relative to each other axially along the control valve (100).

2. The control valve according to claim 1, wherein: The first spool assembly (3) includes a first main body part (32), and the second spool assembly (4) includes a second main body part (42). The second main body part (42) and the second spool (41) are separate parts. The first main body part (32) has a first accommodation space (321), and the second main body part (42) is axially movably limited and arranged in the first accommodation space (321).

3. The control valve according to claim 2, wherein: The control valve (100) includes a driving assembly (6), and the driving assembly (6) includes a lead screw (63) and a driving part (61). The lead screw (63) and at least part of the driving part (61) are located in the valve cavity (1). The lead screw (63) is limitedly connected to the second spool assembly (4). The driving part (61) drives the lead screw to move axially along the control valve (100). The lead screw (63) drives the second spool assembly (4) to move axially along the control valve (100), and the second spool assembly (4) drives the first spool assembly (3) to move axially along the control valve (100).

4. The control valve according to claim 3, wherein: The control valve (100) includes a first limiting part (9) and a second limiting part (10). The first limiting part (9) and the second limiting part (10) are arranged at both ends of the first accommodation space (321). The first limiting part (9) is sleeved on the end of the second main body part (42) far from the valve seat (23), and the second main body part (42) can move axially relative to it. At least part of the outer wall of the first limiting part (9) is fixedly connected to at least part of the inner wall of the first main body part (32). The second limiting part (10) protrudes on the bottom wall (424) of the first accommodation space (321), and the second limiting part (10) is fixedly connected to the first main body part (32). Define the direction in which the lead screw (63) moves towards the valve seat (23) as the first direction (001), and the direction in which the lead screw (63) moves away from the valve seat (23) as the second direction (002); when the second spool assembly (4) moves to the first position along the first direction (001), the first main body portion (42) abuts against the second limiting portion (10) to drive the first spool assembly (3) to move along the first direction (001); when the second spool assembly (4) moves to the second position along the second direction (001), the first main body portion (42) abuts against the first limiting portion (9) to drive the first spool assembly (3) to move along the second direction (002).

5. The control valve according to claim 4, wherein: The control valve (100) includes a rotating member (15), and the rotating member 15 is limitedly sleeved on the end portion of the lead screw 63 relatively close to the valve seat 23; the second main body portion (42) includes a first mating portion (422) and a second mating portion (422), the first mating portion (422) is located on the outer wall of the first main body portion (42), and the first mating portion (422) is limitedly mated with at least a part of the inner wall of the first main body portion (31); the second mating portion (423) is located on the inner wall of the first main body portion (42); at least a part of the outer wall of the rotating member 15 is fixedly mated with the second mating portion (423); The second main body portion (42) is provided with a second accommodation space (421), the control valve (100) further includes an elastic member assembly (8), the elastic member assembly (8) is located in the second accommodation space (421), the elastic member assembly 8 includes a first elastic member (81) and a second elastic member (82), the first elastic member (81) is located inside the second elastic member (82), the end face of the end portion of the lead screw (63) close to the valve seat (23) abuts against the end face of the end portion of the first elastic member (81) away from the valve seat 23, and the end face of the rotating member (15) facing the valve seat (23) abuts against the end face of the end portion of the second elastic member (82) away from the valve seat 23.

6. The control valve according to claim 5, characterized in that: The second spool (41) includes a body portion (412) and a protruding portion (411), the body portion (412) and the protruding portion (411) are fixedly connected; the protruding portion (411) is arranged at the end portion of the body portion (412) away from the valve seat (23), the protruding portion (411) is axially movably arranged in the second accommodation space (421), the end face of the end portion of the first elastic member (81) close to the valve seat (23) abuts against the protruding portion (411); the end face of the end portion of the second elastic member (82) close to the valve seat (23) abuts against the bottom wall (424) of the second main body portion (42).

7. The control valve according to any one of claims 1-6, characterized in that: The control valve (100) has a closed state and a flow regulation state. In the closed state or the flow regulation state, the valve seat (23) is in sealing cooperation with the first valve core (31), at least a part of the first valve core (31) is located in the first valve hole (2312), and the first valve core (31) axially moves relative to the first valve hole (2312).

8. The control valve according to claim 7, characterized in that: At least a part of the inner wall surface of the first valve hole (2312) is in sealing cooperation with at least a part of the outer wall surface of the first valve core (31). A sealing part (5) is arranged between the first valve core (31) and the first valve hole (2312), and the material of the sealing part is a non-metallic material; the sealing part (5) is arranged on at least a part of the inner wall surface of the first valve hole (2312).

9. The control valve according to claim 7, wherein: The first valve core (31) has a first end (311) which is far away from the valve seat (23), and the first end (311) is fixedly connected with the first main body part (32); the first main body part (32) includes a first end face (322), and a receiving groove (3221) is arranged at the end of the first main body part (32) close to the valve seat (23). The receiving groove (3221) is arranged around the first valve core (31) and extends along the second direction (002) from the first end face (322). The control valve (100) includes a sealing member (20), and at least a part of the sealing member (20) is located in the receiving groove (3221).

10. The control valve according to claim 9, wherein: In the closed state or the flow regulation state, at least a part of the first valve core (31) is located in the first valve hole (2312), the first end face (322) is in contact and cooperation with the end face of the opposite valve seat (23), a guiding groove (23111) is arranged in the first valve hole (2312), the guiding groove (23111) and the receiving groove (3221) form a receiving space, and the sealing member (20) is located in the receiving space.

Images