Control valve and water treatment equipment

Abstract

The utility model discloses a control valve and water treatment equipment, and belongs to the technical field of water treatment.The control valve comprises a valve body, an end cover, a piston, a fixing piece and a linear stepping motor, the valve body is provided with a valve cavity, and the valve cavity forms a mounting opening in the valve body; the end cover is connected with the valve body and covers the mounting opening; the piston is arranged in the valve cavity; the fixing piece is connected to the end cover; the linear stepping motor is arranged on the side, away from the valve cavity, of the end cover and connected with the piston and the fixing piece, and the fixing piece can limit rotation of the linear stepping motor so as to drive the piston to move in the first direction. According to the control valve, the linear stepping motor is arranged to drive the piston, the moving distance of the piston can be accurately controlled, so that the position of the piston is positioned, meanwhile, through the arrangement of the linear stepping motor, when the piston is clamped, the force for driving the piston can be increased by reducing the frequency of the pulse signal, and the use reliability of the control valve is improved.

Description

Technical Field

[0001] This application belongs to the field of water treatment technology, specifically relating to control valves and water treatment equipment. Background Technology

[0002] In the control valve, a DC motor drives a gear to rotate, which in turn moves the valve stem. During the movement of the valve stem, a sensor can detect the rotation angle of the gear, thereby indirectly locating the position of the piston.

[0003] However, in actual use, the sensor is located in a small position and is difficult to assemble into the transmission components, resulting in low assembly efficiency of the control valve. Utility Model Content

[0004] The purpose of this utility model is to provide a control valve to solve the technical problem of low assembly efficiency of control valves due to the difficulty in assembling sensor components; another purpose of this application is to provide a water treatment device.

[0005] Technical solution: This application provides a control valve, including:

[0006] A valve body having a valve cavity, the valve cavity forming a mounting port in the valve body;

[0007] An end cap, which is connected to the valve body and seals the mounting port;

[0008] Piston, the piston being disposed in the valve chamber;

[0009] A fastener, the fastener being connected to the end cap;

[0010] A linear stepper motor is disposed on the side of the end cover away from the valve cavity and is connected to the piston and the fixing member. The linear stepper motor is connected to the fixing member to drive the piston to move along a first direction.

[0011] In some embodiments, the end cap has:

[0012] A first receiving cavity has an opening along the first direction on the surface of the end cap away from the valve cavity, and at least a portion of the fastener is disposed in the first receiving cavity;

[0013] A first through hole connects the valve chamber and the first receiving chamber, and a portion of the linear stepper motor passes through the fixing member and the first through hole.

[0014] In some embodiments, the fastener is threadedly connected to the end cap.

[0015] In some embodiments, the fastener has a first limiting surface facing the end cap in a direction perpendicular to the first direction, the end cap has a second limiting surface, the second limiting surface and the first limiting surface are in contact, and the second limiting surface can restrict the rotation of the fastener.

[0016] In some embodiments, the fastener has a second through hole extending through the fastener along the first direction;

[0017] The linear stepper motor includes a fixed part and a movable part connected to each other. The fixed part is connected to the side of the end cover away from the valve cavity, and the movable part passes through the second through hole.

[0018] In some embodiments, the fixing member has a third limiting surface for forming the second through hole, and the moving part has a fourth limiting surface, the third limiting surface being connected to the fourth limiting surface to limit the rotation of the moving part.

[0019] In some embodiments, the linear stepper motor further includes an anti-rotation member disposed in the second through hole and sleeved on the moving part, the anti-rotation member having a fifth limiting surface; the fixing member having a sixth limiting surface, the sixth limiting surface being used to form the second through hole, the sixth limiting surface being connected to the fifth limiting surface to restrict the rotation of the anti-rotation member.

[0020] In some embodiments, the movable part has a seventh limiting surface facing the anti-rotation member in a direction perpendicular to the first direction; the anti-rotation member has a limiting hole and an eighth limiting surface for surrounding the limiting hole, the movable part passes through the limiting hole, and the eighth limiting surface abuts against the seventh limiting surface to restrict the rotation of the movable part.

[0021] In some embodiments, the control valve further includes a seal that is fitted onto a portion of the stepper motor and seals the connection between the stepper motor and the end cap;

[0022] The end cap also has a second receiving cavity, which communicates with the first receiving cavity. The first through hole communicates with the second receiving cavity. The sealing member is disposed in the second receiving cavity, and the fixing member is disposed on the side of the sealing member away from the piston along the first direction.

[0023] Accordingly, this application also provides a water treatment device, including a control valve as described in any of the above embodiments.

[0024] Beneficial Effects: Compared with the prior art, the control valve provided in this application includes a valve body, an end cap, a piston, a fixing member, and a linear stepper motor. The valve body has a valve cavity, and the valve cavity forms an installation port in the valve body. The end cap is connected to the valve body and seals the installation port. The piston is disposed in the valve cavity. The fixing member is connected to the end cap. The linear stepper motor is disposed on the side of the end cap away from the valve cavity and is connected to the piston and the fixing member. The fixing member can restrict the rotation of the linear stepper motor to drive the piston to move along a first direction. By setting a linear stepper motor to drive the piston, this application can accurately control the distance the piston moves, thereby positioning the piston. At the same time, by setting a linear stepper motor, this application can also increase the driving force of the piston by reducing the frequency of the pulse signal when the piston is stuck, thus improving the reliability of the control valve. Attached Figure Description

[0025] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of the structure of the control valve provided in an embodiment of this application;

[0027] Figure 2 A cross-sectional view of a control valve provided in an embodiment of this application;

[0028] Figure 3 for Figure 2 Detailed view of point B in the middle circle;

[0029] Figure 4 This is a schematic diagram of the moving part in the control valve provided in the embodiments of this application;

[0030] Figure 5 This is a schematic diagram of the structure of the fixing component in the control valve provided in the embodiments of this application;

[0031] Figure 6 This is a schematic diagram of the structure of a control valve provided in another embodiment of this application;

[0032] Figure 7 A cross-sectional view of a control valve provided in another embodiment of this application;

[0033] Figure 8 for Figure 7 Detailed view of point A in the middle circle;

[0034] Figure 9 This is a schematic diagram of the structure of the fixing component in the control valve provided in the embodiments of this application;

[0035] Figure 10 This is a schematic diagram of the structure of the control valve stop-rotation component provided in the embodiments of this application;

[0036] Figure 11This is a schematic diagram of the moving part in the control valve provided in the embodiments of this application;

[0037] Reference numerals in the attached drawings: 100-valve body, 110-valve cavity, 120-mounting port, 200-end cap, 210-first receiving cavity, 220-opening, 230-first through hole, 240-second limiting surface, 250-second receiving cavity, 260-support part, 300-piston, 400-fixing part, 410-first limiting surface, 420-second through hole, 430-third limiting surface, 440-sixth limiting surface, 500-linear stepper motor, 510-fixing part, 520-moving part, 521-fourth limiting surface, 522-seventh limiting surface, 530-anti-rotation part, 531-fifth limiting surface, 532-limiting hole, 533-eighth limiting surface, 600-seal, 700-bracket, 800-valve stem. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically limited. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0040] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure of this application, the components and arrangements of specific examples are described below. Of course, these are merely examples and are not intended to limit this application.

[0041] The DC motor in the control valve drives the gear to rotate, thereby moving the valve stem 800. During the movement of the valve stem 800, the sensor can sense the rotation angle of the gear, thereby indirectly locating the position of the piston 300.

[0042] However, in actual use, the sensor is located in a small space, making it difficult to assemble into the transmission components, resulting in low assembly efficiency of the control valve.

[0043] To address the technical problems of difficult sensor assembly and low control valve assembly efficiency mentioned above, the first embodiment of this application provides a control valve. Please refer to... Figure 1 and Figure 6 The control valve includes a valve body 100, an end cap 200, a piston 300, a fixing member 400, and a linear stepper motor 500. The valve body 100 has a valve cavity 110, and the valve cavity 110 forms an installation port 120 in the valve body 100. The end cap 200 is connected to the valve body 100 and covers the installation port 120. The piston 300 is disposed in the valve cavity 110. The fixing member 400 is connected to the end cap 200. The linear stepper motor 500 is disposed on the side of the end cap 200 away from the valve cavity 110 and is connected to the piston 300 and the fixing member 400. The linear stepper motor 500 is connected to the fixing member 400 to drive the piston 300 to move along a first direction X.

[0044] Wherein, the first direction X is the direction of arrow X in the attached diagram.

[0045] Specifically, the fixing member 400 can restrict the rotation of the part connected to the linear stepper motor 500 and the piston 300, so as to drive the piston 300 to move along the first direction X, thereby opening or closing the water passage connected to the valve chamber 110.

[0046] Understandably, the rotor in the linear stepper motor 500 rotates to drive the lead screw connected to the rotor to move along the first direction X. The fixing member 400 provided on the end cover 200 is used to restrict the lead screw from being rotated by the rotor, so that relative rotation occurs between the rotor and the lead screw, thereby enabling the lead screw to move along the first direction X.

[0047] In some embodiments, please refer to Figure 8 The control valve also includes a valve stem 800, which is disposed along a first direction X between the valve stem 800 and the linear stepper motor 500, and is connected to both the valve stem 800 and the linear stepper motor 500. The linear stepper motor 500 drives the piston 300 to move via the valve stem 800.

[0048] During the use of the control valve, the linear stepper motor 500 is connected to the controller and driver to obtain pulse signals to set parameters such as movement direction, movement speed, and movement distance.

[0049] In the above embodiments, using a linear stepper motor 500 to drive the piston 300 allows the distance the piston 300 moves along the first direction X to be determined based on the number of pulse signals. This enables precise positioning of the piston 300 without the need for sensor assembly, reducing the assembly difficulty of the control valve and improving its assembly efficiency. Furthermore, because the linear stepper motor 500 reduces the frequency of the pulse signals to slow down the rotor and increase torque, it increases the force driving the piston 300. This allows the piston 300 to continue moving even when it encounters jamming, ensuring the control valve continues to operate and improving its reliability.

[0050] Specifically, determine the step angle θ0 of the linear stepper motor 500, the number of pulse signals x, and the lead d of the lead screw in the linear stepper motor 500;

[0051] The distance D that piston 300 moves is determined by the following formula:

[0052]

[0053] The piston 300 can be positioned based on its initial position and the distance D it has moved.

[0054] In some embodiments, please refer to Figure 2 and Figure 7 The end cap 200 has a first receiving cavity 210 and a first through hole 230. The first receiving cavity 210 has an opening 220 along a first direction X on the surface of the end cap 200 away from the valve cavity 110. At least a portion of the fixing member 400 is disposed in the first receiving cavity 210. The first through hole 230 connects the valve cavity 110 and the first receiving cavity 210. A portion of the linear stepper motor 500 passes through the fixing member 400 and the first through hole 230.

[0055] In some embodiments, the fastener 400 is entirely disposed in the first receiving cavity 210; in other embodiments, a portion of the fastener 400 is disposed in the first receiving cavity 210, and a portion of the fastener 400 is exposed outside the first receiving cavity 210.

[0056] In the above embodiment, by embedding the fixing member 400 within the first receiving cavity 210, the maximum size of the control valve in the first direction X is reduced, thereby making the control valve structure more compact and occupying less space. Simultaneously, the fixing member 400 embedded in the first receiving cavity 210 has a larger connection area with the end cap 200, resulting in a more stable and reliable connection and improved reliability of the control valve.

[0057] In some embodiments, please refer to Figure 3 and Figure 5 The fastener 400 is threadedly connected to the end cap 200.

[0058] Specifically, the fastener 400 has an external thread, and the first receiving cavity 210 is provided with an internal thread that can mate with the external thread of the fastener 400, so that the fastener 400 is threadedly connected to the end cap 200.

[0059] In the above embodiments, the connection between the threaded fastener 400 and the end cap 200 is simpler, reducing the assembly difficulty of the control valve and improving its assembly efficiency. Simultaneously, after the fastener 400 is fixed to the end cap 200 with a certain torque, the fastener 400 is less likely to rotate relative to the end cap 200, further reducing the possibility of the lead screw in the linear stepper motor 500 rotating with the rotor, thus improving the reliability of the control valve.

[0060] In other embodiments, the fastener 400 is welded to the end cap 200.

[0061] In other embodiments, the cross section of the fastener 400 cut along the first direction X is a regular polygon to prevent it from rotating relative to the end cap 200 when it is inserted into the end cap 200.

[0062] In other embodiments, the fastener 400 is fastened to the end cap 200.

[0063] In some embodiments, please refer to Figure 8 and Figure 9 The fastener 400 has a first limiting surface 410 facing the end cap 200 in a direction perpendicular to the first direction X, and the end cap 200 has a second limiting surface 240. The second limiting surface 240 and the first limiting surface 410 are in contact, and the second limiting surface 240 can restrict the rotation of the fastener 400.

[0064] In some embodiments, both the first limiting surface 410 and the second limiting surface 240 are planar.

[0065] Specifically, the fastener 400 is inserted into the first receiving cavity 210.

[0066] Specifically, the fastener 400 has a plurality of first limiting surfaces 410, which are connected sequentially along the circumference of the fastener 400, such that the fastener 400 is cut in a direction perpendicular to the first direction X, and the shape formed by the plurality of first limiting surfaces 410 in the cross section is a polygon.

[0067] The circumferential direction of the fastener 400 is the direction surrounding the first direction X.

[0068] Correspondingly, the end cap 200 has a plurality of second limiting surfaces 240, the number of which is equal to the number of first limiting surfaces 410. The plurality of second limiting surfaces 240 are connected sequentially along the circumference of the fastener 400 and form a polygonal hole to cooperate with the fastener 400.

[0069] In some embodiments, the number of first limiting surfaces 410 can be 3, 4, 5, 6, 7, 8, 9, 10, 11, or 12; correspondingly, the polygonal holes can be triangular holes, quadrilateral holes, pentagonal holes, hexagonal holes, heptagonal holes, octagonal holes, nonagonal holes, decagonal holes, eleven-sided holes, or dodecagonal holes.

[0070] In some embodiments, the polygonal hole is a regular hexagonal hole, and a portion of the fastener 400 is cut along a direction perpendicular to the first direction X, with the outer contour of the cross section being a regular hexagon.

[0071] In the above embodiment, by setting the first limiting surface 410 and the second limiting surface 240, the possibility of the fixing member 400 rotating relative to the end cover 200 is reduced, further reducing the possibility of the lead screw in the linear stepper motor 500 rotating with the rotor, thus improving the reliability of the control valve. Simultaneously, using the first limiting surface 410 and the second limiting surface 240 to restrict the rotation of the fixing member 400 relative to the end cover 200 also reduces the difficulty of connecting the fixing member 400 to the end cover 200; it only requires inserting the fixing member 400 into the first receiving cavity 210, improving the assembly efficiency of the control valve.

[0072] In some embodiments, please refer to Figure 6 and Figure 7 The control valve also includes a bracket 700, and the end cap 200 also includes a support portion 260 away from the valve body 100. The bracket 700 is connected to the support portion 260, and a linear stepper motor 500 is connected to the side of the bracket 700 away from the valve body 100. A portion of the linear stepper motor 500 is located on the side of the fixing member 400 away from the piston 300 along the first direction X.

[0073] Specifically, the fixing member 400 is disposed between a portion of the end cover 200 and a portion of the linear stepper motor 500 along the first direction X, so that the linear stepper motor 500 can limit the fixing member 400 along the first direction X.

[0074] Specifically, the fixing part 510 of the linear motor 500 is disposed on one side of the fixing member 400 along the first direction X.

[0075] It is understood that in some embodiments, the linear stepper motor 500 is bolted to the end cover 200. In some embodiments, the linear stepper motor 500 is directly bolted to the end cover 200; in other embodiments, the linear stepper motor 500 is bolted to the bracket 700, and indirectly connected to the end cover 200 through the bracket 700.

[0076] It is understood that the bolt includes a head and a shank, and in some embodiments, the head of the bolt is located on the side of the shank facing the valve cavity 110. In the above embodiment, by providing a bracket 700 supported by the support portion 260, the bolt with its head facing the valve cavity 110 can be easily fixed to the linear stepper motor 500, reducing the assembly difficulty of the control valve.

[0077] In some embodiments, the linear stepper motor 500 is first fixed to the bracket 700, and then the bracket 700 is connected to the support portion 260.

[0078] In some embodiments, please refer to Figure 2 , Figure 3 , Figure 7 and Figure 8 The fixing member 400 has a second through hole 420 that passes through the fixing member 400 along the first direction X; the linear stepper motor 500 includes a fixing part 510 and a moving part 520 connected to each other. The fixing part 510 is connected to the side of the end cover 200 away from the valve chamber 110, and the moving part 520 passes through the second through hole 420.

[0079] Specifically, the moving part 520 passes through the fixed part 510, the rotor is disposed inside the fixed part 510, the moving part 520 is a lead screw, and the linear stepper motor 500 drives the moving part 520 to move along the first direction X by rotating the rotor inside the fixed part 510.

[0080] In the above embodiment, the movable part 520 passing through the second through hole 420 can be surrounded by the fixing member 400. The fixing member 400 has a better effect in limiting the rotation of the movable part 520, and the probability that the movable part 520 will follow the rotation of the rotor inside the fixing part 510 is smaller, so the reliability of the control valve is higher.

[0081] In some embodiments, please refer to Figure 3 , Figure 4 and Figure 5 The fixing member 400 has a third limiting surface 430, which is used to form a second through hole 420. The moving part 520 has a fourth limiting surface 521. The third limiting surface 430 is connected to the fourth limiting surface 521 to limit the rotation of the moving part 520.

[0082] In some embodiments, the number of third limiting surfaces 430 and fourth limiting surfaces 521 are equal.

[0083] In some embodiments, the fixing member 400 has a third limiting surface 430, and the moving part 520 has a fourth limiting surface 521; in other embodiments, please refer to Figure 4 and Figure 5The fixing member 400 has two third limiting surfaces 430, which are spaced apart in a direction perpendicular to the first direction X. The moving part 520 has two fourth limiting surfaces 521, which are opposite to each other in a direction perpendicular to the first direction X.

[0084] In the above embodiment, by setting the third limiting surface 430 and the fourth limiting surface 521, the fixing member 400 can directly limit the rotation of the moving part 520, which reduces the number of parts of the control valve, makes the assembly of the control valve simpler, and improves the assembly efficiency of the control valve.

[0085] In some embodiments, please refer to Figure 8 , Figure 9 and Figure 10 The linear stepper motor 500 also includes an anti-rotation member 530, which is disposed in the second through hole 420 and sleeved on the moving part 520. The anti-rotation member 530 has a fifth limiting surface 531. The fixing member 400 has a sixth limiting surface 440, which is used to form the second through hole 420. The sixth limiting surface 440 is connected to the fifth limiting surface 531 to restrict the rotation of the anti-rotation member 530.

[0086] In some embodiments, the number of fifth limiting surfaces 531 and sixth limiting surfaces 440 are equal.

[0087] In some embodiments, the anti-rotation member 530 has a fifth limiting surface 531, and the fixing member 400 has a sixth limiting surface 440; in other embodiments, please refer to Figure 9 and Figure 10 The anti-rotation member 530 has two fifth limiting surfaces 531, which are opposite to each other in a direction perpendicular to the first direction X. The fixing member 400 has two sixth limiting surfaces 440, which are spaced apart in a direction perpendicular to the first direction X.

[0088] In the above embodiments, by providing an anti-rotation member 530 to fill the gap between the fixed member 400 and the moving part 520, the selection range of the linear stepper motor 500 is expanded while ensuring that the fixed member 400 can still restrict the rotation of the moving part 520. Simultaneously, the anti-rotation member 530 allows for a larger thread coverage area of ​​the moving part 520, resulting in smoother and more reliable operation of the linear stepper motor 500.

[0089] In some embodiments, please refer to Figure 10 and Figure 11The moving part 520 has a seventh limiting surface 522 facing the anti-rotation member 530 in a direction perpendicular to the first direction X; the anti-rotation member 530 has a limiting hole 532 and an eighth limiting surface 533 for forming the limiting hole 532, the moving part 520 passes through the limiting hole 532, and the eighth limiting surface 533 is in contact with the seventh limiting surface 522 to limit the rotation of the moving part 520.

[0090] In some embodiments, the number of seventh limiting surfaces 522 and eighth limiting surfaces 533 are equal.

[0091] In some embodiments, the anti-rotation member 530 has an eighth limiting surface 533, and the moving part 520 has a seventh limiting surface 522; in other embodiments, please refer to Figure 10 and Figure 11 The anti-rotation member 530 has two eighth limiting surfaces 533, which are spaced apart along a direction perpendicular to the first direction X. The moving part 520 has two seventh limiting surfaces 522, which are opposite to each other along a direction perpendicular to the first direction X.

[0092] In some embodiments, the movable part 520 includes a threaded part and a connecting part that are interconnected along a first direction X. The external thread of the movable part 520 is provided on the threaded part, and the connecting part is used to connect with the valve stem 800 so that the movable part 520 can be indirectly connected to the piston 300.

[0093] The seventh limiting surface 522 is provided on the threaded portion and along the first direction X. The maximum size of the seventh limiting surface 522 is smaller than the maximum size of the threaded portion, and the minimum distance between the seventh limiting surface 522 and the end of the threaded portion is greater than zero. In other words, the anti-rotation member 530 connected to the seventh limiting surface 522 will be limited along the first direction X by the thread, thereby improving the connection reliability between the anti-rotation member 530 and the moving portion 520.

[0094] In the above embodiment, by setting the seventh limiting surface 522 and the eighth limiting surface 533 to restrict the relative rotation between the anti-rotation member 530 and the moving part 520, the relative rotation between the fixed member 400 and the moving part 520 is restricted, so that the moving part 520 can move along the first direction X to drive the piston 300 to move along the first direction X.

[0095] In some embodiments, please refer to Figure 8 and Figure 10 The anti-rotation member 530, which is fitted onto the moving part 520, is made of two identical parts spliced ​​together. The two spliced ​​parts can form a limiting hole 532, which reduces the difficulty of connecting the anti-rotation member 530 and the moving part 520.

[0096] In some embodiments, please refer to Figure 3 and Figure 8The control valve also includes a seal 600, which is sleeved on the stepper motor and seals the connection between the stepper motor and the end cap 200. The end cap 200 also has a second receiving cavity 250, which communicates with the first receiving cavity 210. A first through hole 230 communicates with the second receiving cavity 250. The seal 600 is disposed in the second receiving cavity 250, and the fixing member 400 is disposed on the side of the seal 600 away from the piston 300 along the first direction X.

[0097] In some embodiments, the seal 600 is a sealing ring fitted onto the movable part 520.

[0098] Specifically, along the first direction X, the second receiving cavity 250 limits the sealing member 600 towards the bottom wall of the first receiving cavity 210 and the fixing member 400; along the direction perpendicular to the first direction X, the second receiving cavity 250 limits the sealing member 600 towards the side wall of the moving part 520 and the moving part 520.

[0099] In the above embodiment, a sealing member 600, sleeved on the moving part 520 and connected to the end cap 200, is provided to prevent liquid in the valve chamber 110 from leaking through the gap between the moving part 520 and the end cap 200. Furthermore, placing the sealing member 600 in the second receiving cavity 250 also limits the sealing member 600 by the fixing member 400 and the moving part 520, thereby reducing the possibility of decreased sealing performance due to displacement of the sealing member 600 and improving the reliability of the control valve.

[0100] Accordingly, this application also provides a water treatment device, including a control valve as described in any of the above embodiments.

[0101] The control valve and water treatment equipment provided in the embodiments of this application have been described in detail above. Specific examples have been used in this application to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A control valve, characterized in that, include: A valve body (100) having a valve cavity (110) forming a mounting port (120) in the valve body (100); End cap (200), the end cap (200) is connected to the valve body (100) and covers the mounting port (120); A piston (300) is disposed in the valve chamber (110); A fastener (400) is connected to the end cap (200); A linear stepper motor (500) is disposed on the side of the end cover (200) away from the valve chamber (110) and connected to the piston (300) and the fixing member (400). The linear stepper motor (500) is connected to the fixing member (400) to drive the piston (300) to move along a first direction (X).

2. The control valve according to claim 1, characterized in that, The end cap (200) has: A first receiving cavity (210) having an opening (220) along the first direction (X) on the surface of the end cap (200) away from the valve cavity (110), and at least a portion of the fastener (400) being disposed in the first receiving cavity (210); The first through hole (230) connects the valve chamber (110) and the first receiving chamber (210), and a portion of the linear stepper motor (500) passes through the fixing member (400) and the first through hole (230).

3. The control valve according to claim 2, characterized in that, The fastener (400) is threadedly connected to the end cap (200).

4. The control valve according to claim 2, characterized in that, The fastener (400) has a first limiting surface (410) facing the end cap (200) in a direction perpendicular to the first direction (X), and the end cap (200) has a second limiting surface (240) that fits against the first limiting surface (410). The second limiting surface (240) can restrict the rotation of the fastener (400).

5. The control valve according to claim 1, characterized in that, The fastener (400) has a second through hole (420) extending through the fastener (400) along the first direction (X); The linear stepper motor (500) includes a fixed part (510) and a moving part (520) connected to each other. The fixed part (510) is connected to the side of the end cover (200) away from the valve chamber (110), and the moving part (520) passes through the second through hole (420).

6. The control valve according to claim 5, characterized in that, The fixing member (400) has a third limiting surface (430) for forming the second through hole (420), and the moving part (520) has a fourth limiting surface (521). The third limiting surface (430) is connected to the fourth limiting surface (521) to limit the rotation of the moving part (520).

7. The control valve according to claim 5, characterized in that, The linear stepper motor (500) further includes an anti-rotation member (530), which is disposed in the second through hole (420) and sleeved on the moving part (520). The anti-rotation member (530) has a fifth limiting surface (531). The fixing member (400) has a sixth limiting surface (440), which is used to surround the second through hole (420). The sixth limiting surface (440) is connected to the fifth limiting surface (531) to restrict the rotation of the anti-rotation member (530).

8. The control valve according to claim 7, characterized in that, The movable part (520) has a seventh limiting surface (522) facing the anti-rotation member (530) in a direction perpendicular to the first direction (X); the anti-rotation member (530) has a limiting hole (532) and an eighth limiting surface (533) for surrounding the limiting hole (532), the movable part (520) passes through the limiting hole (532), and the eighth limiting surface (533) abuts against the seventh limiting surface (522) to restrict the rotation of the movable part (520).

9. The control valve according to claim 2, characterized in that, The control valve also includes a seal (600), which is fitted onto the stepper motor portion and seals the connection between the stepper motor and the end cap (200). The end cap (200) also has a second receiving cavity (250) communicating with the first receiving cavity (210), the first through hole (230) communicating with the second receiving cavity (250), the sealing member (600) being disposed in the second receiving cavity (250), and the fixing member (400) being disposed on the side of the sealing member (600) away from the piston (300) along the first direction (X).

10. A water treatment device, characterized in that, Includes the control valve as described in any one of claims 1-9.

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