A valve head module and a rotary valve

Abstract

The present application relates to the field of valve technology, and discloses a valve head module and a rotary valve, wherein the valve head module includes a valve head, a stator, a first connecting member and a second connecting member, wherein the valve head has a first sealing surface, the stator has a second sealing surface, the stator is closely fitted with the first sealing surface through the second sealing surface, the first connecting member is arranged between the first sealing surface and the second sealing surface to connect the valve head and the stator, the first end of the second connecting member is fixed, and the second end of the second connecting member extends from the circumferential outer wall of the stator into the stator to position the stator. The valve head module disclosed in the present application further adds a second connecting member for positioning the stator, so that when the rotor rotates to switch the flow path, the stator can withstand a greater radial force, thereby reducing the risk of the stator shaking, and ensuring as much as possible that after the flow path is switched, the fluid can flow normally in the flow channels that are connected to each other, effectively improving the service life and reliability of the valve head module.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a valve head module and a rotary valve. Background Art

[0002] The contents of this section merely provide background information related to the present application and may not constitute prior art.

[0003] As one of the core modules of the rotary valve, the valve head module mainly plays the role of flow path switching.

[0004] In some currently known rotary valves, the stator in the valve head module is connected to the valve head by means of four pins arranged between the sealing surfaces of the stator and the valve head, so that the flow channel on the stator and the flow channel on the valve head can be accurately aligned, and the stator can be disassembled to facilitate the later replacement of the stator.

[0005] However, with regard to the method of fixing the stator with pins, during the flow path switching process, the rotor that cooperates with the stator seal will continue to rotate, and a certain friction force will be generated between the rotor and the stator. This friction force can be regarded as a radial force acting on the stator. Since the material of the stator is generally an ultra-high molecular weight polymer with weak creep resistance, when the radial force applied to the stator exceeds its own tolerance limit, the pin holes on the stator may be deformed, causing the stator to shake, so that the flow channel on the stator and the flow channel on the valve head, as well as the flow channel on the stator and the flow channel on the rotor are not accurately aligned, thereby affecting the normal flow of the fluid in the corresponding flow channel. Utility Model Content

[0006] In view of this, the purpose of the present application is to provide a valve head module that enables the stator to withstand greater radial forces. At the same time, the present application also provides a rotary valve using the valve head module.

[0007] The purpose of this application is achieved through the following technical solutions:

[0008] In one aspect, the present application discloses a valve head module, comprising:

[0009] A valve head having a first sealing surface;

[0010] The stator has a second sealing surface; the stator is closely fitted with the first sealing surface through the second sealing surface;

[0011] A first connecting member, disposed between the first sealing surface and the second sealing surface, to connect the valve head and the stator;

[0012] A second connecting member, wherein a first end of the second connecting member is fixed, and a second end of the second connecting member extends from a circumferential outer wall of the stator into the stator to position the stator.

[0013] In some possible embodiments, a circumferential outer wall of the stator is provided with a positioning groove suitable for receiving the second end of the second connecting member, and the positioning groove extends in a radial direction of the stator.

[0014] In some possible embodiments, the stator further has a third sealing surface opposite to the second sealing surface, and the positioning groove penetrates the third sealing surface on a side facing the third sealing surface.

[0015] In some possible embodiments, the first connecting member has a first connecting portion and a second connecting portion, the diameter of the first connecting portion is greater than the diameter of the second connecting portion, the first connecting portion is connected to the stator, and the second connecting portion is connected to the valve head.

[0016] In some possible embodiments, the stator further has a third sealing surface opposite to the second sealing surface;

[0017] The valve head module also includes:

[0018] A rotor having a fourth sealing surface; the rotor is closely fitted with the third sealing surface through the fourth sealing surface; the rotor is configured to be rotatable relative to the stator;

[0019] An optical coupling baffle, integrated on the rotor;

[0020] The optical coupler is integrated and arranged beside the optical coupler baffle and configured to identify the identification point on the optical coupler baffle.

[0021] In some possible embodiments, a rotor base is provided on a side of the rotor facing away from the stator, and the rotor base is configured to rotate synchronously with the rotor;

[0022] The optical coupling baffle includes a first optical coupling baffle and a second optical coupling baffle, and the first optical coupling baffle and the second optical coupling baffle are sequentially sleeved on the outer wall of the rotor base along the axial direction of the rotor base; the optical coupling assembly is configured to identify the identification points on the first optical coupling baffle and the second optical coupling baffle.

[0023] In some possible embodiments, the valve head module also includes a valve seat, the valve head is fixedly connected to the valve seat, the valve seat defines an accommodating cavity inside, the rotor and the stator are both located in the accommodating cavity, and the first end of the second connecting member is connected to the valve seat.

[0024] In some possible embodiments, an upwardly open receiving groove is provided on the valve seat, the receiving groove corresponds to the second connecting member one by one, and the first end of the second connecting member is received in the receiving groove.

[0025] In some possible embodiments, the valve head module further includes a first locating bearing and a second locating bearing;

[0026] The first locating bearing and the second locating bearing are sequentially arranged along the axial direction of the rotor base; the rotor base sequentially passes through the first locating bearing and the second locating bearing, and is rotatably matched with the first locating bearing and the second locating bearing.

[0027] On the other hand, the present application discloses a rotary valve, comprising the valve head module described above.

[0028] The technical solution of the embodiment of the present application has at least the following advantages and beneficial effects:

[0029] 1. The valve head module disclosed in the present application further adds a second connecting piece for positioning the stator, so that when the rotor rotates to switch the flow path, the stator can withstand a larger radial force, thereby reducing the risk of stator shaking, and ensuring as much as possible that after the flow path is switched, the fluid can flow normally in the flow channels that are connected to each other, effectively improving the service life and reliability of the valve head module.

[0030] 2. The present application integrates an optocoupler baffle for identifying the rotation position of the rotor on the rotor, so that the relative position of the rotor and the optocoupler integration can be controlled through relatively simple assembly tolerances. On this basis, it is only necessary to relax the matching dimensions of the valve head module and the power source to ensure that the entire system, especially the rotation of the rotor, is not affected by assembly stress without strictly controlling the transmission tolerance, thereby effectively improving the accuracy of flow path switching. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of a valve head module provided in an embodiment of the present application;

[0032] Figure 2 for Figure 1 The structural exploded view of the valve head module is shown;

[0033] Figure 3 for Figure 1 A cross-sectional view of a valve head module is shown;

[0034] Figure 4 for Figure 3 A magnified view of the structure at center A;

[0035] Figure 5 A schematic diagram of the structure of a stator provided in an embodiment of the present application;

[0036] Figure 6 for Figure 2 The enlarged view of point B in the middle;

[0037] Figure 7 A schematic structural diagram of a first connecting member provided in an embodiment of the present application;

[0038] Figure 8 A schematic diagram of the structure of a rotary valve provided in an embodiment of the present application;

[0039] Fig. 9 for Figure 8 A cross-sectional view of a rotary valve is shown.

[0040] Icons: 10-valve head module, 11-valve head, 111-first sealing surface, 112-first liquid inlet channel, 113-first liquid outlet channel, 12-stator, 121-second sealing surface, 122-third sealing surface, 123-second liquid inlet channel, 124-second liquid outlet channel, 125-positioning groove, 13-rotor, 131-fourth sealing surface, 132-transition channel, 14-first connecting piece, 141-first connecting part, 142-third Second connecting part, 15-second connecting piece, 16-valve seat, 161-accommodating groove, 17-rotor base, 18-optical coupling baffle, 181-first optical coupling baffle, 182-second optical coupling baffle, 19-optical coupling integration, 1010-bracket, 1011-optical coupling cover, 1012-thrust bearing, 1013-disc spring, 1014-first positioning bearing, 1015-second positioning bearing, 20-drive module, 21-motor, 22-adapter shaft. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific implementation methods. The same figure marks in the accompanying drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] Compared to the embodiments shown in the drawings, feasible implementations within the scope of protection of the present application may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0043] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by persons with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components.

[0044] On the one hand, please refer to Figures 1 to 7 The embodiment of the present application discloses a valve head module 10. The valve head module 10 disclosed in the embodiment of the present application can be applied to a rotary valve, thereby providing a flow path switching function for the rotary valve. In general, the valve head module 10 disclosed in the embodiment of the present application can include a valve head 11, a stator 12, and a rotor 13.

[0045] Combination Figure 3 and Figure 4 As shown, the valve head 11 has a first sealing surface 111, and the valve head 11 is provided with a first liquid inlet channel 112 and a plurality of first liquid outlet channels 113 penetrating the first sealing surface 111. Preferably, the first liquid inlet channel 112 can be located at the geometric center of the valve head 11, and the plurality of first liquid outlet channels 113 can be uniformly arranged in sequence around the first liquid inlet channel 112, so that the structure of the valve head 11 is more compact and beautiful.

[0046] The stator 12 has a second sealing surface 121 and a third sealing surface 122 opposite to the second sealing surface 121. The stator 12 is tightly fitted with the first sealing surface 111 of the valve head 11 through the second sealing surface 121 to form a seal. In addition, the stator 12 is provided with a second liquid inlet channel 123 and a plurality of second liquid outlet channels 124 that simultaneously penetrate the second sealing surface 121 and the third sealing surface 122. In the assembled state, the second liquid inlet channel 123 on the stator 12 is connected to the first liquid inlet channel 112 of the valve head 11, and the plurality of second liquid outlet channels 124 on the stator 12 correspond one-to-one to the plurality of first liquid outlet channels 113 on the valve head 11, and the corresponding first liquid outlet channels 113 and second liquid outlet channels 124 are connected to each other.

[0047] The rotor 13 is disposed on the side of the stator 12 away from the valve head 11, and the rotor 13 has a fourth sealing surface 131, through which the rotor 13 is closely fitted with the third sealing surface 122 of the stator 12 to form a seal. At the same time, the fourth sealing surface 131 of the rotor 13 is provided with a transition channel 132, one end of which is connected to the second liquid inlet channel 123 penetrating the third sealing surface 122 of the stator 12, and the other end of the transition channel 132 is selectively connected to one of the plurality of second liquid outlet channels 124 penetrating the third sealing surface 122 of the stator 12.

[0048] Specifically, the rotor 13 can rotate relative to the stator 12 , and the transition channel 132 can connect the second liquid inlet channel 123 with different second liquid outlet channels 124 by means of the rotation of the rotor 13 , thereby realizing a basic flow path switching function.

[0049] On this basis, combined with the description in the background technology of this application, it can be seen that in the known partial rotary valve, due to the connection method between the stator 12 and the valve head 11, the stator 12 cannot withstand a large radial force. In the process of the rotor 13 rotating to switch the flow path, it is easy to cause the pin hole on the stator 12 to deform, thereby causing the stator 12 to shake, so that the flow channel on the stator 12 and the flow channel on the valve head 11, the flow channel on the stator 12 and the flow channel on the rotor 13 are not accurately aligned, affecting the normal flow of the fluid in the corresponding flow channel.

[0050] To this end, the valve head module 10 disclosed in the embodiment of the present application may further include a first connecting member 14 and a second connecting member 15. Figure 2 As shown, the first connecting member 14 is disposed between the first sealing surface 111 of the valve head 11 and the second sealing surface 121 of the stator 12, so as to connect the valve head 11 and the stator 12 through the first connecting member 14, thereby realizing the preliminary connection between the valve head 11 and the stator 12. It is understandable that the first connecting member 14 can be, but is not limited to, a pin, and the number of the first connecting members 14 can be multiple, which is not limited here. For example, the drawings of the present application show a situation where four first connecting members 14 are arranged in an array.

[0051] The second connecting member 15 is used to further locate the position of the stator 12. Figure 3 and Figure 4 As shown, the first end of the second connecting member 15 is fixed, and the second end of the second connecting member 15 extends into the stator 12 from the circumferential outer wall of the stator 12 (ie, the outer wall between the second sealing surface 121 and the third sealing surface 122 ) to locate the position of the stator 12 .

[0052] It is worth noting that, on the basis of setting the first connecting member 14 to preliminarily connect the stator 12 and the valve head 11, a second connecting member 15 is added which extends from the circumferential outer wall of the stator 12 into the stator 12. The second connecting member 15 can further limit the freedom of the stator 12, and enable the stator 12 to withstand a larger radial torque without deformation during the rotation of the rotor 13 to switch the flow path, thereby reducing the risk of the stator 12 shaking, and ensuring as much as possible that after the flow path is switched, the fluid can flow normally in the flow channels that are connected to each other, thereby effectively improving the service life and reliability of the valve head module 10.

[0053] In some embodiments of the present application, in order to achieve reliable positioning of the second connecting member 15, as shown in FIG. Figure 4 and Figure 5As shown, the circumferential outer wall of the stator 12 is provided with a positioning groove 125 suitable for receiving the second end of the second connector 15, and the positioning groove 125 extends toward the inside of the stator 12 along the radial direction of the stator 12. In other words, the positioning groove 125 extends toward the center of the stator 12. In addition, the second end of the second connector 15 can be inserted into the positioning groove 125, so that the stator 12 is positioned by the second connector 15 inserted into the positioning groove 125. The second connector 15 can be, but is not limited to, a pin.

[0054] Further, see Figure 5 As shown, the side of the positioning groove 125 facing the third sealing surface 122 of the stator 12 passes through the third sealing surface 122. In other words, the side of the positioning groove 125 facing the third sealing surface 122 is an open structure. In this way, when the second connecting member 15 needs to be inserted into the positioning groove 125, it is only necessary to place the stator 12 above the second connecting member 15 and align the positioning groove 125 on the stator 12 with the second connecting member 15. Then, the second connecting member 15 can be embedded in the corresponding positioning groove 125 by moving the stator 12 downward, thereby simplifying the process of inserting the second connecting member 15 into the positioning groove 125.

[0055] In actual implementation, the number of second connectors 15 can be set to multiple, so as to further improve the effect of positioning the stator 12, and multiple second connectors 15 can be evenly distributed in sequence along the circumference of the stator 12, so that the force on the stator 12 is more uniform. It can be understood that when there are multiple second connectors 15, there are also multiple positioning grooves 125 on the stator 12, and the multiple positioning grooves 125 correspond to the second connectors 15 one by one, so that one second connector 15 can be received through one positioning groove 125. For example, the drawings of the present application show a situation where four second connectors 15 are provided. At this time, refer to Figure 5 As shown, four positioning grooves 125 are correspondingly arranged on the stator 12 .

[0056] Secondly, in some embodiments of the present application, Figure 2 and Figure 7 As shown, the first connecting member 14 may be a stepped pin, so that the first connecting member 14 has a first connecting portion 141 and a second connecting portion 142 of different diameters, and the diameter of the first connecting portion 141 is larger than that of the second connecting portion 142. The second sealing surface 121 of the stator 12 is provided with a pin hole, so that the first connecting portion 141 can be connected to the stator 12 through the corresponding pin hole, and the second connecting portion 142 is connected to the valve head 11.

[0057] It should be noted that by designing the first connecting member 14 to be in a stepped form and allowing the first connecting portion 141 with a larger diameter to be connected to the stator 12, compared with the known method of connecting the stator 12 and the valve head 11 with a cylindrical pin of constant diameter in the prior art, the contact area between the first connecting member 14 and the stator 12 can be effectively increased, which is beneficial to further improve the ability of the stator 12 to withstand radial forces.

[0058] In some embodiments of the present application, Figures 1 to 3 As shown, the valve head module 10 may further include a valve seat 16, which is used to provide a mounting carrier for the valve head 11 and other components, and to provide protection for the stator 12 and the rotor 13 and other components. Specifically, the valve head 11 is fixedly connected to the top of the valve seat 16, and the valve seat 16 is provided with an upwardly open accommodation cavity inside, the rotor 13 and the stator 12 are both located in the accommodation cavity, and the second connecting member 15 can also be located in the accommodation cavity, and the first end of the second connecting member 15 is connected to the valve seat 16. In this way, combined with the above, after the stator 12 and the valve head 11 are initially connected through the first connecting member 14, it is only necessary to make the positioning groove 125 on the stator 12 correspond one-to-one with the second connecting member 15, and then the stator 12 can be inserted downward into the accommodating cavity of the valve seat 16, so that the single second connecting member 15 is embedded in the corresponding positioning groove 125, and the valve head 11 is supported on the top of the valve seat 16, and then the valve head 11 can be locked on the valve seat 16 with the help of fasteners such as screws, so as to achieve the installation and fixation of the valve head 11 and the stator 12, and this method is conducive to the rapid removal of the valve head 11 together with the stator 12 from the valve seat 16 at a later time, so as to facilitate the rapid replacement and maintenance of the stator 12.

[0059] It is understandable that in order to simplify the installation process of the second connecting member 15, Figure 2 and Figure 6 As shown in the figure, an upwardly open receiving groove 161 can be provided on the valve seat 16, and the receiving groove 161 corresponds to the second connecting member 15 one by one. In this way, the second connecting member 15 can be initially positioned on the valve seat 16 by only accommodating the first end of the second connecting member 15 in the receiving groove 161. On this basis, in combination with the above, when the stator 12 is assembled into the receiving cavity of the valve seat 16, the second connecting member 15 can be limited by the cooperation between the stator 12 and the valve seat 16, thereby achieving the purpose of positioning the stator 12 by the second connecting member 15, and this design method is conducive to quickly replacing the second connecting member 15 as needed.

[0060] In some embodiments of the present application, in order to enable the rotor 13 to rotate relative to the stator 12, the Figure 3As shown in the figure, the valve head module 10 may further include a rotor base 17, which is arranged on the side of the rotor 13 away from the stator 12. Of course, in other embodiments of the present application, the rotor base 17 may also be a part extending downward from the bottom of the rotor 13, that is, the rotor base 17 and the rotor 13 may be one component. In addition, the rotor base 17 is used for transmission connection to the output end of the driving module 20.

[0061] The driving module 20 is a component for outputting a rotational motion, and the driving module 20 may be a driving module 20 used by a rotary valve known in the prior art. Fig. 9 As shown, the driving module 20 may include a motor 21 and an adapter shaft 22, one end of the adapter shaft 22 is transmission-connected to the motor 21 so that the motor 21 drives the adapter shaft 22 to rotate, and the other end of the adapter shaft 22 is transmission-connected to the rotor base 17 so that the rotor base 17 can rotate coaxially with the adapter shaft 22. In this way, the rotor base 17 can be driven by the motor 21 to rotate, and then the rotor 13 can be driven to rotate coaxially through the rotor base 17, thereby realizing the switching of the flow path.

[0062] On this basis, in order to reasonably control the flow path switching so that the transition channel 132 on the rotor 13 can accurately connect the second liquid inlet channel 123 with the predetermined second liquid outlet channel 124, the rotary valves known in the prior art are usually equipped with a position identification module composed of an optical coupling baffle 18 and an optical coupling integration 19 (that is, an optical coupling control board) to detect and identify the rotational position of the rotor 13.

[0063] However, the inventor of the present application further discovered that in known rotary valves, the optical coupling baffle 18 is usually coaxially sleeved on the adapter shaft 22 of the drive module 20. In this way, since the valve head module 10 and the drive module 20 are not on the same positioning system, the accuracy of the adapter shaft 22 driving the rotor 13 to rotate to switch the flow path is often insufficient, and due to tolerance problems during manufacturing, the adapter shaft 22, the rotor base 17, and the rotor 13 and other rotating parts cannot absolutely rotate around the same central axis. If you want to control the rotation deviation caused by tolerance problems later, it will cost a lot of money, and if the control is not strict, the torque required for the rotation of the rotor 13 will be too large (because it needs to overcome the large assembly stress between the various components to do work), thereby causing the motor 21 of the drive module 20 to lose steps, further affecting the accuracy of the flow path switching.

[0064] To this end, in some embodiments of the present application, it is expected that the position of the optical coupling baffle 18 can be changed to improve the accuracy of identifying the rotational position of the rotor 13, thereby improving the accuracy of flow path switching.

[0065] Specifically, combined Figure 3 As shown, the optical coupling baffle 18 is integrated on the rotor 13, and specifically, the optical coupling baffle 18 can be fixedly set on the rotor base 17 coaxially connected to the rotor 13. The optical coupling integration 19 is arranged beside the optical coupling baffle 18, and the optical coupling integration 19 is used in conjunction with the optical coupling baffle 18, so as to identify the identification point on the optical coupling baffle 18 through the optical coupling integration 19, thereby determining the rotation position of the rotor 13. It can be understood that by integrating the optical coupling baffle 18 on the rotor 13, the relative position of the rotor 13 and the optical coupling integration 19 can be controlled by a relatively simple assembly tolerance. On this basis, it is only necessary to relax the matching dimensions of the valve head module 10 and the power source (that is, the motor 21 of the drive module 20), so as to achieve the situation where the transmission tolerance is not strictly controlled, and ensure that the rotation of the entire system, especially the rotor 13, is not affected by the assembly stress, thereby ensuring that the flow path can be accurately switched.

[0066] For further information, please refer to Figure 3 , the optical coupling baffle 18 may include a first optical coupling baffle 181 and a second optical coupling baffle 182. The first optical coupling baffle 181 may be used as a zero position optical coupling baffle to determine the initial position of the rotor 13, and the second optical coupling baffle 182 may be used as a position optical coupling baffle to determine the stop position of the rotor 13 after each rotation. When the rotor 13 rotates to the corresponding stop position each time, the transition channel 132 on the rotor 13 can connect the second liquid inlet channel 123 with the different second liquid outlet channels 124, thereby realizing the switching of the flow path. In addition, the first optical coupling baffle 181 and the second optical coupling baffle 182 may be sequentially sleeved on the outer wall of the rotor base 17 along the axial direction of the rotor base 17. At this time, the optical coupling integrated circuit 19 is used to identify the identification points on the first optical coupling baffle 181 and the second optical coupling baffle 182, so as to detect the rotation position of the rotor base 17 in real time through the optical coupling integrated circuit 19, thereby achieving the purpose of detecting the rotation position of the rotor 13.

[0067] In some embodiments of the present application, in order to ensure the structural integrity of the valve head module 10, Figure 1 and Figure 3 As shown in the content, the valve head module 10 further includes a bracket 1010, and the bracket 1010 is arranged on the side of the valve seat 16 away from the valve head 11. At this time, the rotor base 17 is accommodated inside the bracket 1010, and the optocoupler integration 19 located next to the optocoupler baffle 18 can be fixed on the bracket 1010 through the optocoupler cover 1011.

[0068] Further, such as Figure 3As shown, a thrust bearing 1012, a disc spring 1013, a first positioning bearing 1014 and a second positioning bearing 1015 are also provided inside the bracket 1010. The thrust bearing 1012 and the disc spring 1013 are both sleeved on the outer wall of the rotor base 17, and the rotor base 17 is rotatably matched with the inner ring of the thrust bearing 1012. The thrust bearing 1012 is used to bear the axial force that always exists when the rotor base 17 rotates. The two ends of the disc spring 1013 are respectively abutted against the thrust bearing 1012 and the rotor base 17, so that the disc spring 1013 provides an upward elastic force for the rotor base 17, thereby forming a reliable seal between the fourth sealing surface 131 of the rotor 13 and the third sealing surface 122 of the stator 12, and the second sealing surface 121 of the stator 12 and the first sealing surface 111 of the valve head 11.

[0069] The first locating bearing 1014 and the second locating bearing 1015 are sequentially arranged along the axial direction of the rotor base 17, and the rotor base 17 passes through the first locating bearing 1014 and the second locating bearing 1015 in sequence, and the rotor base 17 is simultaneously rotatably matched with the first locating bearing 1014 and the second locating bearing 1015. Preferably, the first locating bearing 1014 may be a deep groove ball bearing arranged at a position close to the rotor 13, and the second locating bearing 1015 may be a flange-type deep groove ball bearing arranged at a position far from the rotor 13.

[0070] It can be understood that the function of the first locating bearing 1015 and the second locating bearing 1016 is to limit and guide the rotor base 17, so that when the rotor base 17 drives the rotor 13 to rotate, the concentricity of the rotor 13 and the stator 12 can always be maintained within an acceptable range. Compared with the known rotary valve that only provides one guide ring to limit and guide the rotor base 17, it can further ensure the accuracy of flow path switching.

[0071] On the other hand, referring to Figure 8 and Fig. 9 The embodiment of the present application also discloses a rotary valve, which includes the valve head module 10 and the driving module 20 described above, wherein the motor 21 of the driving module 20 is transmission-connected with the adapter shaft 22, and the adapter shaft 22 is transmission-connected with the end of the rotor base 17 away from the rotor 13, so that the motor 21 can be used to drive the rotor base 17 to rotate, thereby driving the rotor 13 to rotate through the rotor base 17 to achieve flow path switching.

[0072] It can be understood that the rotary valve disclosed in the embodiment of the present application adopts the above-mentioned valve head module 10, so that the rotary valve has the beneficial effects of the above-mentioned valve head module 10, and can effectively improve the service life, reliability and accuracy of the rotary valve during actual application.

[0073] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A valve head module, characterized in that: include: A valve head having a first sealing surface; The stator has a second sealing surface; the stator is closely fitted with the first sealing surface through the second sealing surface; A first connecting member, disposed between the first sealing surface and the second sealing surface, to connect the valve head and the stator; A second connecting member, wherein a first end of the second connecting member is fixed, and a second end of the second connecting member extends from a circumferential outer wall of the stator into the stator to position the stator.

2. The valve head module according to claim 1, characterized in that: A circumferential outer wall of the stator is provided with a positioning groove suitable for receiving the second end of the second connecting member, and the positioning groove extends in the radial direction of the stator.

3. The valve head module according to claim 2, characterized in that: The stator further has a third sealing surface opposite to the second sealing surface, and the positioning groove penetrates the third sealing surface on a side facing the third sealing surface.

4. The valve head module according to claim 1, characterized in that: The first connecting member has a first connecting portion and a second connecting portion, the diameter of the first connecting portion is greater than the diameter of the second connecting portion, the first connecting portion is connected to the stator, and the second connecting portion is connected to the valve head.

5. The valve head module according to claim 1, characterized in that: The stator also has a third sealing surface opposite to the second sealing surface; The valve head module also includes: A rotor having a fourth sealing surface; the rotor is closely fitted with the third sealing surface through the fourth sealing surface; the rotor is configured to be rotatable relative to the stator; An optical coupling baffle, integrated on the rotor; The optical coupler is integrated and arranged beside the optical coupler baffle and configured to identify the identification point on the optical coupler baffle.

6. The valve head module according to claim 5, characterized in that: A rotor base is provided on a side of the rotor facing away from the stator, and the rotor base is configured to rotate synchronously with the rotor; The optical coupling baffle includes a first optical coupling baffle and a second optical coupling baffle, and the first optical coupling baffle and the second optical coupling baffle are sequentially sleeved on the outer wall of the rotor base along the axial direction of the rotor base; the optical coupling assembly is configured to identify the identification points on the first optical coupling baffle and the second optical coupling baffle.

7. The valve head module according to claim 5, characterized in that: It also includes a valve seat, the valve head is fixedly connected to the valve seat, an accommodating cavity is defined inside the valve seat, the rotor and the stator are both located in the accommodating cavity, and the first end of the second connecting member is connected to the valve seat.

8. The valve head module according to claim 7, characterized in that: The valve seat is provided with an upwardly open receiving groove, the receiving groove corresponds to the second connecting member one by one, and the first end of the second connecting member is received in the receiving groove.

9. The valve head module according to claim 6, characterized in that: Also includes a first locating bearing and a second locating bearing; The first locating bearing and the second locating bearing are sequentially arranged along the axial direction of the rotor base; the rotor base sequentially passes through the first locating bearing and the second locating bearing, and is rotatably matched with the first locating bearing and the second locating bearing.

10. A rotary valve, characterized in that: A valve head module comprising any one of claims 1 to 9.

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