Valve apparatus

Abstract

A valve apparatus (1), comprising a rod component (11) and a valve core assembly (12), the valve core assembly comprising a valve core body (121) and a guide portion (123), the guide portion having a guide hole (1231), the rod component comprising an extension portion (112), at least part of the extension portion being located in the guide hole, and the extension portion having a guide fit with the guide portion. The valve apparatus helps prevent the valve core assembly from deflecting, improving the coaxiality of the valve core assembly and a valve port (151), thereby improving the precision of the valve apparatus.

Description

A valve device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 20, 2023, with application number 202311543214.9 and invention name “A Valve Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of fluid control technology, and in particular to a valve device. Background Art

[0003] The valve assembly includes a rotor assembly, a valve stem, a valve seat assembly, and a valve core assembly. The rotor assembly drives the screw assembly to rotate. The valve seat assembly has a valve port, and the screw assembly drives the valve core assembly to move axially relative to the valve port. However, in related art, the valve core assembly has a large deflection angle relative to the valve port, resulting in poor coaxiality between the valve core assembly and the valve port, which reduces the accuracy of the valve assembly. Summary of the Invention

[0004] The object of the present application is to provide a valve device that helps prevent the valve core assembly from deflecting.

[0005] To achieve the above objectives, one embodiment of the present application adopts the following technical solution:

[0006] A valve device, which includes a rod component and a valve core assembly, the valve core assembly includes a valve core body and a guide part, the valve core body and the guide part are an integral structure or fixedly connected or limit-connected, the guide part has a guide hole, the rod component includes an extension part, at least part of the extension part is located in the guide hole, and the extension part is guided and cooperated with the guide part.

[0007] In the valve device provided in the embodiments of the present application, the valve core assembly includes a valve core body and a guide portion. The guide portion has a guide hole, and the rod component includes an extension portion, at least a portion of which is located in the guide hole. The extension portion is guided and engaged with the guide portion. This helps prevent deflection of the valve core assembly, improves the coaxiality of the valve core assembly and the valve port, and thus improves the accuracy of the valve device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG1 is a front view schematic structural diagram of a first embodiment of a valve device provided by the present application;

[0009] FIG2 is a schematic cross-sectional view of the valve device along plane AA in FIG1 ;

[0010] FIG3 is a cross-sectional structural diagram of the valve device in FIG1 from another perspective (valve closed state);

[0011] FIG4 is a cross-sectional structural diagram of the valve device in FIG1 from another perspective (valve open state);

[0012] FIG5 is a schematic perspective view of the valve core assembly in FIG2 ;

[0013] FIG6 is a perspective structural diagram of the valve core assembly in FIG5 without the mounting ring;

[0014] FIG7 is a schematic cross-sectional view of the structure in FIG6 from one perspective;

[0015] FIG8 is a schematic perspective structural diagram of the nut member in FIG7 from one perspective;

[0016] FIG9 is a schematic cross-sectional view of a modified example of the first embodiment of the valve device provided in the present application;

[0017] FIG10 is a schematic cross-sectional view of a second embodiment of the valve device provided by the present application from one perspective;

[0018] FIG11 is a schematic cross-sectional view of a third embodiment of the valve device provided by the present application from one perspective;

[0019] FIG12 is a schematic cross-sectional view of a fourth embodiment of a valve device provided by the present application from one perspective;

[0020] FIG13 is a front structural schematic diagram of the rod component in FIG12 from one perspective;

[0021] FIG14 is a front view schematic structural diagram of another embodiment of the rod component in FIG12 from one perspective;

[0022] FIG15 is a schematic cross-sectional structural diagram of a fifth embodiment of the valve device provided in the present application from one perspective. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Numerous specific details are provided in the following detailed description for a comprehensive understanding of the present invention. However, those skilled in the art will appreciate that the specific components, devices, and features illustrated in the drawings and described herein are merely exemplary and should not be construed as limiting.

[0024] Referring to Figures 1-3, the valve device 1 can be used in automotive, household, or commercial air conditioning systems, as well as in battery cooling systems in automotive and other fields, and other systems requiring thermal management. In these types of systems, the valve device 1 generally functions as a throttling element or a switching element, or as an element with both throttling and switching functions. This application describes a valve device 1 for use in a circulation system using CO2 as a refrigerant.

[0025] With reference to Figures 1 to 3, an embodiment of a valve device 1 is schematically introduced. The valve device 1 can be used as a part of an electric valve, and the electric valve also includes a coil assembly (not shown in the figure) and a valve body (not shown in the figure). The valve device 1 includes a valve seat assembly 15 and a sleeve 16. The sleeve 16 is fixedly connected to the valve seat assembly 15 and sealed at the connection between the two. The connection methods include welding, bonding, etc. The valve body can be a separate valve block or a part of other components. For example, it can be a part of a heat exchanger or a flow channel plate in a cooling system. When the valve body is a separate valve block, the valve device 1 can be first fixedly connected to the valve body, and the coil assembly is then sleeved on the outer periphery of the valve device 1. The coil assembly is fixedly connected to the valve body. The connection methods include screw connection, clamping, etc.

[0026] Referring to Figures 1-8, the valve device 1 further includes a rod component 11, a valve core assembly 12, a rotor assembly 13, and a support member 14. The rotor assembly 13 is located within the inner cavity formed by the sleeve 16. The valve seat assembly 15 has a valve seat inner cavity 152, with at least a portion of the valve core assembly 12 located within the valve seat inner cavity 152. The rod component 11 is connected to the rotor assembly 13 by welding, snap-fitting, or other methods. In this embodiment, the support member 14 is fixedly connected to the valve seat assembly 15 by welding, snap-fitting, or other methods. The rod component 11 has a mating section 111b. The support member 14 is sleeved on the rod component 11, with the mating section 111b of the rod component 11 having a clearance fit with the support member 14. In this application, the valve device 1 further includes a bearing member 4. The inner ring of the bearing member 4 is fixedly connected or positionally connected to the rod component 11, and the outer ring of the bearing member 4 is connected to the valve seat assembly 15. The rod component 11 cannot move up and down axially relative to the bearing member 4. Passing a predetermined current through the stator assembly generates an excitation magnetic field, causing the rotor assembly 13 to rotate. The rotor assembly 13 can drive the rod component 11 to rotate, thereby causing the rod component 11 to rotate circumferentially relative to the support component 14. The rod component 11 and the valve core assembly 12 are in transmission cooperation, and the rod component 11 can cause the valve core assembly 12 to move axially up and down relative to the valve port 151 provided on the valve seat assembly 15, thereby adjusting the flow area of ​​the valve port 151 and, in turn, adjusting the flow rate of the refrigerant in the cooling system. In this embodiment, the valve seat assembly 15 includes an inlet channel 153 and an outlet channel 154. The flow area between the inlet channel 153 and the outlet channel 154 is adjusted by the cooperation between the valve core assembly 12 and the valve port 151. The valve device also includes a second elastic member 5, the lower end of the second elastic member 5 abuts the valve core assembly 12, and the upper end abuts the gasket 6. Of course, the upper end can also abut the bearing member 4 or the rod component 11.

[0027] With reference to Figures 1 to 8, in this embodiment, the rod component 11 includes a first matching portion 111, the valve core assembly 12 includes a valve core body 121 and a transmission matching portion 122, and the first matching portion 111 and the valve core assembly 12 are matched through the transmission matching portion 122. In the specific embodiment provided in this application, the first matching portion 111 includes an external threaded portion 111a, and the transmission matching portion 122 includes a nut member 122a, the nut member 122a has a threaded hole 122a1, and the first matching portion 111 can be threadedly matched with the nut member 122a, and the nut member 122a is fixedly connected or limitedly connected to the valve core body 121. This embodiment is described with the nut member 122a being limitedly connected to the valve core body 121. In this embodiment, the valve core body 121 is roughly cylindrical, and the valve core assembly 12 includes a valve core cavity 125, and at least part of the nut member 122a is located in the valve core cavity 125. The valve core assembly 12 also includes a mounting ring 126, which is fixedly connected to the valve core body 121. The fixed connection methods include welding and interference fit. The nut member 122a is limited to the valve core body 121 by the mounting ring 126. The nut member 122a can have a certain axial movement space relative to the valve core body 121. The valve core assembly 12 also includes a first elastic member 124. One end of the first elastic member 124 abuts against the lower end surface of the nut member 122a, and the other end abuts against the guide portion 123. This arrangement can enable the first elastic member 124 to be compressed in a small range.

[0028] Referring to Figures 1 to 8, in the embodiment of the present application, since the first matching portion 111 and the valve core assembly 12 are matched through the transmission matching portion 122, the valve core assembly 12 can move axially relative to the valve port 151. In this embodiment, further, the nut member 122a also includes a limiting protrusion 122a2, and the limiting protrusion 122a2 is a non-annular structure. The inner circumferential wall of the valve seat assembly 15 has a shape that is roughly adapted to the outer periphery of the valve core body 121. The valve seat assembly 15 also has a limiting groove 155 that is adapted to the limiting protrusion 122a2 of the nut member 122a, and the limiting groove 155 is further recessed from the inner circumferential wall of the valve seat assembly 15. The limiting protrusion 122a2 of the nut member 122a extends into the limiting groove 155, and the limiting groove 155 restricts the circumferential rotation of the nut member 122a. Therefore, in this embodiment, the valve core assembly 12 can only move axially up and down relative to the valve port 151, and cannot rotate relative to the valve port 151. This configuration helps reduce friction on the wall forming the valve port 151 and improve the service life of the valve device 1. In other embodiments, the transmission mating portion 122 can be a bearing. In this case, the first mating portion 111 does not need to be an externally threaded portion. For example, the first mating portion 111 can be a smooth segment that is fixedly mated with the inner ring of the bearing. The outer ring of the bearing mates with the valve core body 121, thereby achieving transmission mating between the rod component 11 and the valve core assembly 12.

[0029] In conjunction with Figures 1-8 , in the first embodiment of the present application, the valve core assembly 12 further includes a guide portion 123. The guide portion 123 and the valve core body 121 are integrally formed, or the two are formed separately and then fixedly connected or positionally connected. The guide portion 123 has a guide hole 1231. The rod component 11 includes an extension portion 112. At least a portion of the extension portion 112 is located in the guide hole 1231. The extension portion 112 and the guide portion 123 are guided and cooperated. The extension portion 112 extends axially along the rod component 11, and part of the extension portion 112 is located in the valve core cavity 125. The extension portion 112 is located below the first matching portion 111, and the guide hole 1231 is coaxially arranged with the rod component 11. Referring to Figures 3 and 4, the valve device in Figure 3 is in a closed state, and the valve device in Figure 4 is in an open state. During the operation of the valve device 1, part of the extension portion 112 is always located in the guide hole 1231 and cooperates with the wall guide forming the guide hole 1231. The extension portion 112 can always provide guidance for the wall forming the guide hole 1231. With this arrangement, the extension portion 112 of the rod component 11 can form a guide for the guide portion 123, which can prevent the valve core body 121 from deflecting relative to the extension portion 112, that is, prevent the valve core assembly 12 from deflecting relative to the rod component 11, and also reduce the deflection of the valve core assembly 12 relative to the valve port 151. Therefore, the coaxiality of the valve core assembly 12 and the valve port 151 can be improved, and collision with the valve port 151 can be avoided, thereby improving the accuracy of flow regulation and reducing the flow leakage at the valve port 151 when closing the valve; at the same time, it also prevents the valve core assembly 12 from being damaged due to poor coaxiality with the rod component 11, resulting in damage to the thread at the threaded fitting of the nut part 122a and the rod component 11, thereby causing stalling.

[0030] In this embodiment, the extension portion 112 extends axially along the rod component 11, the guide hole 1231 is coaxially disposed with the extension portion 112, and the guide portion 123 is located at the lower end of the valve core assembly 12. This arrangement can further improve the coaxiality between the valve core assembly 12 and the valve port 151, reduce deflection of the valve core assembly 12 relative to the valve port 151, and improve the accuracy of the valve device 1. In other embodiments, as shown in FIG9 , the guide portion 123 is located between the first mating portion 111 of the rod component 11 and the lower end of the valve core body 121. This arrangement can also improve the coaxiality between the valve core assembly 12 and the valve port 151 while reducing the length of the rod component 11.

[0031] In this embodiment, the extension portion 112 is loosely coupled with the wall forming the guide hole 1231. This arrangement not only serves as a guide to prevent the valve core assembly 12 from shaking or deflecting relative to the rod member 11, but also allows the valve core assembly 12 to move smoothly up and down axially relative to the extension portion 112. The inner diameter of the guide hole 1231 can be set, for example, to be approximately 0.1 mm larger than the outer diameter of the extension portion. Of course, in other embodiments, the extension portion 112 and the wall forming the guide hole 1231 can be loosely coupled. This arrangement can both meet the requirements and reduce the processing difficulty.

[0032] In this embodiment, the valve device 1 further includes a first balancing channel 21, through which the valve core cavity 125 communicates with the space outside the guide portion 123. The valve core cavity 125 communicates with the first balancing channel 21, and the valve core cavity 125 communicates with the space outside the guide portion 123 through the first balancing channel 21. The valve device 1 further includes a second balancing channel 22, which communicates with the spaces above and below the nut member 122a. Specifically, in this embodiment, the second balancing channel 22 can connect the valve core cavity 125 with the cavity where the rotor assembly 13 is located. The second balancing channel 22 includes a reserved gap between the nut member 122a and the valve core body 121. The reserved gap includes a reserved groove 1221 located on the outer periphery of the nut member 122a. In this embodiment, the valve core assembly 12 and the valve seat assembly 15 are sealed by the first sealing portion 3. Therefore, the provision of the first balancing channel 21 and the second balancing channel 22 can connect the space outside the guide portion 123 with the cavity where the rotor assembly 13 is located, thereby balancing the pressure between the space outside the guide portion 123 and the cavity where the rotor assembly 13 is located, which is beneficial to reducing the valve opening resistance and further reducing the driving force of the electric valve.

[0033] In this embodiment, the first balancing channel 21 is located in the guide portion 123. At least a portion of the first balancing channel 21 extends through the guide portion 123. At least a portion of the wall forming the first balancing channel 21 is located in the guide portion 123. This arrangement facilitates the processing of the first balancing channel 21. In this embodiment, the first balancing channel 21 is offset from the guide hole 1231. One or more first balancing channels 21 may be provided, and the shapes may be, for example, circular, square, etc.

[0034] Referring to Figure 10, in a second embodiment of the present application, the first balancing channel 21 is located within the extension portion 112. The first balancing channel 21 includes a first opening 211 and a second opening 212. Along the axial direction of the guide portion 123, the second opening 212 is located on one side of the guide portion 123, and the first opening 211 is located on the other side of the guide portion 123. The first opening 211 communicates with the valve core cavity 125, and the second opening 212 communicates with the space outside the guide portion 123. In a specific structure provided in this embodiment, the first balancing channel 21 includes a radial channel 213 and an axial channel 214, and the axial channel 214 communicates with the radial channel 213. The first opening 211 communicates with the radial channel 213. The first opening 211 is located on the outer periphery of the extension portion 112, and the second opening 212 is located on the bottom wall of the extension portion 112.

[0035] Referring to Figure 11, in the third embodiment of the present application, relative to the second embodiment, the first balancing channel 21 is an inclined hole, and the inclined hole is inclined relative to the axial direction of the extension portion 112. The first opening 211 and the second opening 212 are respectively located at the two ends of the inclined hole. The first opening 211 is connected to the valve core cavity 125, and the second opening 212 is connected to the space outside the guide portion 123. The processing of the inclined hole is relatively simple.

[0036] In conjunction with Figures 12-14 , in the fourth embodiment of the present application, the first balancing channel 21 includes a preset gap between the wall forming the guide hole 1231 and the extension portion 112. The wall forming the guide hole 1231 has a groove, and / or the outer peripheral wall of the extension portion 112 has a groove 21a, and the groove 21a constitutes the preset gap serving as the first balancing channel 21. In this embodiment, the groove 21a includes a threaded groove or a knurled groove, which can connect the valve core cavity 125 with the space outside the guide portion 123. It should be noted that the structures of the first, second, third, and fourth embodiments of the present application can be used individually or in combination.

[0037] Referring to Figure 15, in the fifth embodiment of the present application, relative to the first embodiment, the extension portion 112 includes an extension portion body 1121 and a guide sleeve 1122. The guide sleeve 1122 is sleeved on the outer periphery of the extension portion body 1121. The guide sleeve 1122 is made of a wear-resistant material, such as a material composed of PTFE (Polytetrafluoroethylene) and carbon powder. Of course, the wear-resistant material can also be a wear-resistant resin material such as peek. In this embodiment, the extension portion body 1121 is provided with a mounting groove, and the extension portion 112 is installed in the mounting groove. The provision of the guide sleeve 1122 can improve the wear resistance and service life of the extension portion 112, and the installation of the guide sleeve 1122 is also relatively simple. In other embodiments, the extension portion 112 can include the extension portion body 1121 and a guide coating. The guide coating covers the outer peripheral surface of the extension portion body 1121. The guide coating is made of a wear-resistant material. Such a provision can also improve the wear resistance and service life of the extension portion 112.

[0038] Referring to FIG11 , in a sixth embodiment of the present application, the guide portion 123 and the valve core body 121 are separate structures. The guide portion 123 is fixedly connected or position-limited to the valve core body 121. The guide portion 123 is made of a wear-resistant material. This configuration can also improve the wear resistance and service life of the guide portion 123. Schematically, in this embodiment, the guide portion 123 and the valve core body 121 are interferingly engaged and limited. The valve core body 121 has a support protrusion 1211. The top surface of the guide portion 123 support protrusion 1211 abuts against the top surface of the guide portion 123 support protrusion 1211. The guide portion 123 and the support protrusion 1211 are radially engaged and limited. Of course, the radial interference engagement is not required. In this embodiment, the valve core assembly 12 further includes a first elastic member 124. One end of the first elastic member 124 abuts against the lower end surface of the nut member 122a, and the other end abuts against the guide portion 123, thereby limiting the position of the guide portion 123 relative to the support protrusion 1211. Of course, in another embodiment, the guide portion 123 can be an integral structure or a separate structure with the valve core body 121, and the wall forming the guide hole 1231 is covered with a guide coating made of a wear-resistant material. It should be noted that the sixth embodiment of the present application can be a further improvement based on the first embodiment of the present application, or a further improvement based on the fifth embodiment of the present application. In addition, the structures of the aforementioned embodiments can be combined with each other.

[0039] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A valve device (1), characterized in that: The valve device (1) comprises a rod component (11) and a valve core assembly (12); the valve core assembly (12) comprises a valve core body (121) and a guide portion (123); the valve core body (121) and the guide portion (123) are an integral structure or are fixedly connected or position-limitedly connected; the guide portion (123) has a guide hole (1231); the rod component (11) comprises an extension portion (112); at least a portion of the extension portion (112) is located in the guide hole (1231); the extension portion (112) and the guide portion (123) are guided and matched.

2. The valve device (1) according to claim 1, characterized in that The valve device (1) also includes a rotor assembly (13) and a valve seat assembly (15); the rotor assembly (13) is connected to the rod component (11); the rotor assembly (13) can drive the rod component (11) to rotate; the valve seat assembly (15) has a valve port (151); the rod component (11) is transmission-matched with the valve core assembly (12); the rod component (11) can make the valve core assembly (12) move axially relative to the valve port (151); the rod component (11) includes a first matching portion (111); the valve core assembly (12) includes a transmission matching portion (122); the first matching portion (111) and the valve core assembly (12) are transmission-matched via the transmission matching portion (122).

3. The valve device (1) according to claim 1 or 2, characterized in that The extension portion (112) extends along the axial direction of the rod component (11), and the extension portion (112) is located below the first matching portion (111). During the operation of the valve device (1), a portion of the extension portion (112) is always located in the guide hole (1231) and is matched with the wall that forms the guide hole (1231).

4. The valve device (1) according to claim 3, characterized in that The guide hole (1231) is coaxially arranged with the extension portion (112); the guide portion (123) is located at the lower end of the valve core assembly (12); or, the guide portion (123) is located between the first matching portion (111) of the rod component (11) and the lower end of the valve core body (121).

5. The valve device according to claim 3 or 4, characterized in that: The extension portion (112) is clearance-matched or transition-matched with the wall forming the guide hole (1231).

6. The valve device (1) according to any one of claims 3 to 5, characterized in that: The extension part (112) comprises an extension part body (1121) and a guide sleeve (1122), wherein the guide sleeve (1122) is sleeved on the outer periphery of the extension part body (1121); or the extension part (112) comprises an extension part body (1121) and a guide coating, wherein the guide coating covers the outer peripheral surface of the extension part body (1121); the guide sleeve (1122) or the guide coating is made of a wear-resistant material.

7. The valve device (1) according to any one of claims 3 to 6, characterized in that: The guide portion (123) and the valve core body (121) are separate structures, the guide portion (123) and the valve core body (121) are fixedly connected or limit-connected, and the guide portion (123) is made of wear-resistant material; or, the guide portion (123) and the valve core body (121) are an integral structure or a separate structure, the wall forming the guide hole (1231) is covered with a guide coating, and the guide coating is made of wear-resistant material.

8. The valve device (1) according to any one of claims 1 to 7, characterized in that: The valve core assembly (12) has a valve core cavity (125), and part of the extension portion (112) is located in the valve core cavity (125). The valve device (1) also includes a first balancing channel (21), and the valve core cavity (125) is connected to the first balancing channel (21).

9. The valve device (1) according to claim 8, characterized in that At least a portion of the first balancing channel (21) passes through the guide portion (123), at least a portion of the wall forming the first balancing channel (21) is located on the guide portion (123), and the first balancing channel (21) is arranged to deviate from the guide hole (1231).

10. The valve device (1) according to claim 8 or 9, characterized in that The first balancing channel (21) is located in the extension portion (112), and the first balancing channel (21) includes a first opening (211) and a second opening (212). The first opening (211) is connected to the valve core cavity (125), and along the axial direction of the guide portion (123), the second opening (212) is located on one side of the guide portion (123), and the first opening (211) is located on the other side of the guide portion (123).

11. The valve device (1) according to claim 10, characterized in that The first balancing channel (21) comprises an axial channel (214) and a radial channel (213), the axial channel (214) being in communication with the radial channel (213), the first opening (211) being in communication with the radial channel (213), the first opening (211) being located at an outer peripheral portion of the extension portion (112), and the second opening (212) being located at a bottom wall of the extension portion (112); or the first balancing channel (21) comprises an inclined hole, the inclined hole being arranged obliquely relative to an axial direction of the extension portion (112), and the first opening (211) and the second opening (212) being located at two ends of the inclined hole, respectively.

12. The valve device (1) according to any one of claims 8 to 11, characterized in that: The first balancing channel (21) includes a preset gap between the wall forming the guide hole (1231) and the extension portion (112), the wall forming the guide hole (1231) has a groove (21a), and / or the outer peripheral wall of the extension portion (112) has a groove (21a), the groove (21a) constitutes the preset gap of the first balancing channel (21), and the groove (21a) includes a thread groove or a knurled groove.

13. The valve device (1) according to any one of claims 1 to 12, characterized in that: The first matching portion (111) includes an external threaded portion (111a), the transmission matching portion (122) includes a nut member (122a), the nut member (122a) has a threaded hole (122a1), the first matching portion (111) can be threadedly matched with the nut member (122a), and the nut member (122a) is fixedly connected or limit-connected to the valve core body (121).

14. The valve device (1) according to claim 13, characterized in that At least a portion of the nut member (122a) is located in the valve core cavity (125); the valve core assembly (12) further comprises a mounting ring (126); the mounting ring (126) is fixedly connected to the valve core body (121); the nut member (122a) is limited by the mounting ring (126) to be located on the valve core body (121); the valve device (1) further comprises a second balancing channel (22); the second balancing channel (22) is connected to the space above and below the nut member (122a); the second balancing channel (22) comprises a reserved gap between the nut member (122a) and the valve core body (121).

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