Valve device

Abstract

The invention provides a valve device which can reduce pressure loss of fluid. The valve device comprises a valve body, the valve body is provided with a valve cavity, the valve body comprises a cavity wall part corresponding to the valve cavity, the cavity wall part is provided with a plurality of openings communicated with the valve cavity, and the openings are distributed in the circumferential direction of the valve body; the valve rod comprises a sealing part, the valve rod rotates in the circumferential direction to drive the sealing part to rotate to at least one blocking position, and at the blocking position, the sealing part blocks one opening; the valve rod further comprises a reinforcing rib, and the sealing part and the reinforcing rib are distributed in the circumferential direction of the valve rod. The reinforcing rib and any opening are arranged in the circumferential direction of the valve body in a spaced mode.

Description

Technical Field

[0001] This application relates to the field of fluid control device technology, specifically to a valve device. Background Technology

[0002] An electric valve includes a valve body and a valve stem. The valve body has a valve cavity with multiple circumferentially distributed openings. A sealing part is located at one end of the valve stem, which is inserted into the valve cavity. When the valve stem rotates, the sealing part can correspondingly block or open the corresponding openings. To ensure strength, in some related technical solutions, the sealing part is designed as a sector-shaped block structure. That is, one end of the valve stem is connected to a sector-shaped block, the arc-shaped surface of which serves as the sealing surface. The radius of the sealing surface is approximately equal to the radius of the valve cavity, and the center of the sector-shaped block is roughly located in the center of the valve cavity. This allows the sector-shaped block to easily obstruct the fluid flow within the valve cavity, resulting in higher pressure loss. Summary of the Invention

[0003] The purpose of this application is to provide a valve device that can reduce pressure loss of fluid.

[0004] To solve the above-mentioned technical problems, this application provides a valve device, comprising:

[0005] A valve body having a valve cavity, the valve body including a cavity wall portion corresponding to the valve cavity, the cavity wall portion having a plurality of openings communicating with the valve cavity, the plurality of openings being distributed circumferentially along the valve body;

[0006] The valve stem includes a sealing portion, which can be rotated circumferentially to rotate the sealing portion to at least one sealing position, whereby the sealing portion seals one of the openings; the valve stem also includes reinforcing ribs, and the sealing portion and the reinforcing ribs are distributed circumferentially along the valve stem; the reinforcing ribs and any of the openings are spaced apart circumferentially in the valve body.

[0007] The valve stem in this application includes a sealing part and a reinforcing rib. The reinforcing rib and the sealing part are distributed circumferentially, which can improve the strength of the valve stem. At the same time, the reinforcing ribs used for reinforcement are spaced apart from any opening in the circumferential direction, so as not to obstruct the flow of fluid, thereby reducing pressure loss. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the valve device in the embodiments of this application;

[0009] Figure 2 for Figure 1 A cross-sectional schematic diagram of the valve body of the intermediate valve device;

[0010] Figure 3 for Figure 2 Enlarged schematic diagram of the location of the middle valve chamber;

[0011] Figure 4 for Figure 1 A schematic diagram of the valve stem of the intermediate valve device;

[0012] Figure 5 for Figure 4 Front view of the valve stem;

[0013] Figure 6 for Figure 5 Schematic sectional view along the middle AA direction;

[0014] Figure 7 for Figure 2 A schematic diagram of the structure where the middle sealing part is located between the first sealing position and the second sealing position;

[0015] Figure 8 for Figure 2 A schematic diagram of the structure where the middle sealing part is in the second sealing position.

[0016] The annotations in the attached figures are explained as follows:

[0017] 100-Valve device;

[0018] 10-Valve stem; 101-Valve stem body; 102-Sealing end; 1021-Sealing part; 10211-Sealing surface; 1022-Reinforcing rib; 1023-End plate; 1024-Annular part;

[0019] 20-Valve body; 201-First interface portion; 201a-First flow channel; 202-Second interface portion; 202a-Second flow channel; 203-Third interface portion; 203a-Third flow channel; 204-Cavity wall portion; 2041-First wall surface; 2041a-First side edge; 2041b-Second side edge; 204a-First opening; 204b-Second opening; 204c-Third opening; 20a-Valve cavity;

[0020] 30 - Valve cover. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] In the embodiments of this application, the terms "first" and "second" are used only to distinguish features that are structurally identical or similar, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0023] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the valve device 100 in the embodiments of this application; Figure 2 for Figure 1A cross-sectional view of the valve body 20 of the valve device 100, viewed along the direction perpendicular to the axial direction of the valve body 20; Figure 3 for Figure 2 Enlarged schematic diagram of position 20a in the middle valve chamber.

[0024] The valve device 100 in this embodiment includes a valve body 20 and a valve stem 10. A portion of the valve stem 10 is inserted into the valve cavity 20a of the valve body 20. The valve stem 10 can be driven to rotate by a driving component (not shown in the figure), thereby controlling the opening and closing of the communication path inside the valve device 100. The valve device 100 is, for example, an electric valve. Figure 2 , 3 As shown, the valve body 20 includes a cavity wall portion 204 that encloses and forms a valve cavity 20a. In this embodiment, the valve cavity 20a is generally cylindrical. Furthermore, the cavity wall portion 204 corresponding to the valve cavity 20a has multiple openings communicating with the valve cavity 20a. These openings penetrate the cavity wall portion 204, connecting the inside and outside of the cavity wall portion 204. With the axis of the valve body 20 as a reference, the opening closer to the axis is considered the inside, and the opening farther from the axis is considered the outside. Specifically, the openings may penetrate the cavity wall portion 204 radially along the valve body 20. The multiple openings are distributed circumferentially along the valve body 20; "multiple" refers to two or more openings. Figure 2 , 3 The diagram shows three openings: the first opening 204a, the second opening 204b, and the third opening 204c, which are distributed sequentially along the circumference.

[0025] In this embodiment, the valve body 20 also includes interface portions corresponding to the openings, namely a first interface portion 201, a second interface portion 202, and a third interface portion 203. All three interface portions are circular tube structures. The first interface portion 201 has a first flow channel 201a, the second interface portion 202 has a second flow channel 202a, and the third interface portion 203 has a third flow channel 203a. The first flow channel 201a is connected to the first opening 204a, the second flow channel 202a is connected to the second opening 204b, and the third flow channel 203a is connected to the third opening 204c. The three interface portions are distributed circumferentially along the valve body 20. Figure 2 As can be seen, the valve body 20 is roughly T-shaped when projected along the axial direction. The valve body 20 can be an integral structure, or it can be divided into two parts, such as the interface part and the cavity wall part 204. The interface part can be threaded to connect with other equipment or pipelines.

[0026] You can continue to refer to this. Figures 4 to 6 , Figure 4 for Figure 1 A schematic diagram of the valve stem 10 of the intermediate valve device 100; Figure 5 for Figure 4 Front view of the middle valve stem 10; Figure 6 for Figure 5 Schematic sectional view along the AA direction.

[0027] In this embodiment, the valve stem 10 of the valve device 100 has a sealing portion 1021. Specifically, the valve stem 10 includes a valve stem body 101 and a sealing end portion 102 located at one end of the valve stem body 101. The valve stem body 101 is drivenly connected to a driving component, which may include, for example, a rotor. The valve stem body 101 and the rotor are drivenly connected. The sealing end portion 102 includes the sealing portion 1021. At least a portion of the sealing portion 1021 is located within the valve cavity 20a. The sealing portion 1021 has a sealing surface 10211, which is in contact with the inner wall surface of the cavity wall portion 204. The inner wall surface is the surface facing the valve cavity 20a. Rotation of the valve stem 10 in the circumferential direction can drive the sealing portion 1021 to rotate, such as... Figure 1 As shown, the valve device 100 also includes a valve cover 30, which covers the valve body 20. The valve stem body 101 passes through the valve cover 30. The connection between the valve cover 30, the valve body 20 and the valve stem 10 is sealed to ensure that the fluid flows only between the opening and the valve cavity 20a.

[0028] When the valve stem 10 rotates, the sealing part 1021 can move to different positions along the circumference of the valve body 20 to block different openings of the valve body 20. When the sealing part 1021 is in a blocking position, the sealing part 1021 has at least one blocking position. In the blocking position, the sealing part 1021 blocks the corresponding opening. When blocking, part of the sealing surface 10211 of the sealing part 1021 is attached to the inner wall surface around the opening of the cavity wall part 204, and the remaining part of the sealing surface 10211 corresponds to the opening.

[0029] Can continue to combine Figure 7 and Figure 8 understand, Figure 7 for Figure 2 A schematic diagram of the structure of the middle sealing part 1021 located between the first sealing position and the second sealing position; Figure 8 for Figure 2 A schematic diagram of the middle sealing part 1021 in the second sealing position.

[0030] In this embodiment, the sealing part 1021 has two sealing positions. In one sealing position, the sealing part 1021 seals the first opening 204a. This sealing position is defined as the first sealing position. Figure 2 As shown, in another sealing position, the sealing part 1021 seals the second opening 204b, which can be defined as the second sealing position, such as... Figure 8As shown. At this time, there are two connecting paths within the valve body 20: one is the connection between the first opening 204a and the third opening 204c, and the other is the connection between the second opening 204b and the third opening 204c. The first opening 204a and the second opening 204b can serve as fluid inlets, and the third opening 204c can serve as fluid outlets. Conversely, the first opening 204a and the second opening 204b can serve as fluid outlets, and the third opening 204c can serve as fluid inlets. Figure 7 As shown, when the sealing part 1021 is between the first sealing position and the second sealing position, the first opening 204a, the second opening 204b and the third opening 204c can all be connected, but the opening degree of the first opening 204a and the second opening 204b is less than the maximum opening degree.

[0031] The fan-shaped sealing portion of the valve stem described in the background art can easily block other openings. In this embodiment, the radial thickness of the sealing portion 1021 can be set to be relatively thin to prevent the sealing portion 1021 from extending into the middle of the valve cavity 20a and obstructing the fluid flow of other openings. Therefore, in this embodiment, the radial thickness of the sealing portion 1021 is less than the radius of the sealing surface 10211 of the sealing portion 1021. The radius of the sealing surface 10211 is actually approximately equal to the radius of the arc-shaped inner wall surface of the cavity wall portion 204. In this way, the sealing portion 1021 will not extend to the middle of the valve cavity 20a. That is to say, the sealing portion 1021 can be set to be relatively thin. Figure 6 As can be seen, the sealing part 1021 is specifically configured as an arc-shaped plate. In this way, when the sealing part 1021 blocks the opening, the relatively thin sealing part 1021 is less likely to block other openings.

[0032] Furthermore, since the sealing part 1021 seals one opening at a sealing position, its circumferential length cannot be too long to avoid obstructing other openings in the circumferential direction. That is, during circumferential movement, it cannot simultaneously obstruct two openings. Figure 6 As shown, in order to fit against the inner wall of the cavity wall 204, the sealing surface 10211 of the sealing part 1021 is an arc-shaped surface, and the entire sealing part 1021 is an arc-shaped plate structure. Thus, the sealing part 1021 is not a complete annular structure, and is not symmetrical relative to the axis of the valve stem 10. Furthermore, the sealing part 1021 is relatively thin, resulting in uneven stress and weak strength at the sealing end 102 during valve stem 10 rotation. To ensure the strength of the sealing part 1021 at the valve stem 10, the sealing end 102 also includes a reinforcing rib 1022. The sealing part 1021 and the reinforcing rib 1022 are distributed circumferentially along the valve stem 10, and both are connected to the valve stem body 101 to balance the stress on the sealing end 102 and enhance its strength.

[0033] It is worth noting that the reinforcing ribs 1022 of the valve stem 10 and any opening of the valve body 20 are spaced apart in the circumferential direction of the valve body 20. Here, "spaced apart" means that they are always maintained at a distance. That is, as the valve stem 10 rotates and causes the sealing part 1021 to change its sealing position, the reinforcing ribs 1022 are always spaced apart from all openings in the circumferential direction. In other words, along the radial direction of the valve body 20, the reinforcing ribs 1022 always correspond to the cavity wall 204, and fluid flowing towards or from any opening will not directly face the reinforcing ribs 1022.

[0034] With this configuration, when the valve stem 10 rotates to adjust the circumferential position of the sealing part 1021 to adjust the flow path within the valve body 20, the structural design of the sealing part 1021 ensures that it only blocks one opening as needed, minimizing interference with fluid flow through other openings. Furthermore, the addition of reinforcing ribs 1022 ensures the strength of the sealing end 102. Simultaneously, the added reinforcing ribs 1022 are not located at the openings, so fluid flow into or out of the openings is not obstructed by the reinforcing ribs 1022, thereby reducing pressure loss in fluid flow. Therefore, the structure of the sealing end 102 of the valve stem 10 in this embodiment facilitates the blocking of one opening without increasing the resistance to fluid flow within the valve cavity 20a.

[0035] Please continue to refer to this. Figure 2 , 3 It is understood that the inner wall surface of the cavity wall portion 204 includes a first wall surface 2041 located between the first opening 204a and the third opening 204c. Specifically, the circumferential length of the first wall surface 2041 can be set to be no less than the rotational stroke of the sealing portion 1021 from the first sealing position to the second sealing position; that is, the circumferential length of the first wall surface 2041 is no less than the rotational stroke of the sealing portion 1021 during the adjustment of the opening. The reinforcing rib 1022 can always correspond to the first wall surface 2041 radially. When the sealing portion 1021 switches between the first sealing position and the second sealing position, the reinforcing rib 1022 can slide along the first wall surface 2041. The reinforcing rib 1022 will not move to the position of the first opening 204a, nor will it move to the position of the third opening 204c, and will not obstruct the flow of fluid into or out of the first opening 204a or the third opening 204c. Of course, the reinforcing rib 1022 also cannot obstruct the flow of fluid into or out of the second opening 204b. By limiting the circumferential length of the first wall surface 2041 to be greater than the stroke of the sealing part 1021, the relative position of the reinforcing rib 1022 and the sealing part 1021 in the circumferential direction can be adjusted so that during the rotation of the valve stem 10, the reinforcing rib 1022 will not cross the first wall surface 2041 in the circumferential direction and reach the position of the first opening 204a or the third opening 204c.

[0036] like Figure 3As shown, the first wall surface 2041 includes a first side edge 2041a and a second side edge 2041b distributed circumferentially. In the first sealing position, the sealing portion 1021 has a reinforcing rib 1022 located at the first side edge 2041a, as shown... Figure 2 As shown, the sealing part 1021 is at the second sealing position, and the reinforcing rib 1022 is located at the second side edge 2041b, as... Figure 8 As shown, the circumferential length of the first wall surface 2041 and the stroke of the sealing part 1021 are approximately equal. In this way, the length of the first wall surface 2041 does not need to be very long, and the volume of the valve body 20 can be controlled while ensuring the flow area of ​​the opening.

[0037] Let's look again. Figure 6 In this embodiment, the reinforcing rib 1022 and the sealing part 1021 have an included angle α in the circumferential direction of the valve stem 10. The line connecting the center of the reinforcing rib 1022 along the circumferential direction and the center of the valve cavity 20a forms a first connecting line L1, and the line connecting the center of the sealing part 1021 along the circumferential direction and the center of the valve cavity 20a forms a second connecting line L2. The included angle α is the angle between the first connecting line L1 and the second connecting line L2. In this embodiment, the included angle α can be set to less than 150°. Figure 2 As shown, the first opening 204a and the third opening 204c are roughly distributed radially. If the reinforcing rib 1022 and the sealing part 1021 are distributed radially (i.e., the included angle α is approximately 180°), then when the sealing part 1021 blocks the first opening 204a, the reinforcing rib 1022 will be radially opposite to the third opening 204c. Therefore, setting the included angle α to less than 150° helps to ensure that the reinforcing rib 1022 will not reach the position of the third opening 204c during rotation. The included angle α obviously has a positive correlation with the circumferential length of the first wall surface 2041 and can be set according to the required rotation stroke of the sealing part 1021. When the circumference of the inner wall surface of the cavity wall part 204 is constant, the longer the circumferential length of the first wall surface 2041, the larger the included angle α can be, and vice versa.

[0038] like Figure 4 As shown, the reinforcing rib 1022 in this embodiment is a columnar structure extending axially along the valve stem 10. It serves a reinforcing function without occupying excessive circumferential space, thus ensuring that the volume of the valve body 20 can be controlled without causing flow resistance to the fluid. The radial thickness of the reinforcing rib 1022 and the radial thickness of the sealing part 1021 can be approximately equal. Specifically, a cylindrical structure can be pre-processed, and a portion can be hollowed out to form the reinforcing rib 1022 and the sealing part 1021. The window formed by hollowing out between the sealing part 1021 and the reinforcing rib 1022 will not interfere with the flow of fluid.

[0039] You can continue to refer to this. Figure 4 and Figure 5In this embodiment, the sealing end 102 of the valve stem 10 further includes an end plate 1023 and an annular portion 1024 distributed axially. The end plate 1023 is connected to the valve stem body 101. The sealing portion 1021 is axially connected between the end plate 1023 and the annular portion 1024, and the reinforcing rib 1022 is axially connected between the end plate 1023 and the annular portion 1024. That is, one end of the sealing portion 1021 and the reinforcing rib 1022 is not directly connected to the valve stem body 101, but is connected through the end plate 1023. Meanwhile, the other end of the sealing portion 1021 and the reinforcing rib 1022 is connected by the annular portion 1024. At this time, the sealing end 102 is equivalent to a hollow structure. The end plate 1023 and the annular portion 1024 can reliably connect the sealing portion 1021 and the reinforcing rib 1022 into one unit, resulting in a reliable structure with high strength. As mentioned above, the reinforcing rib 1022 and sealing part 1021 can be formed by hollowing out a cylindrical structure. When hollowing out, an annular part 1024 can be reserved. That is, the annular part 1024, sealing part 1021, end plate 1023 and reinforcing rib 1022 can be an integral structure.

[0040] In this embodiment, the radial dimension of the sealing end 102 is larger than that of the valve stem body 101 compared to the valve stem body 101. The valve stem body 101 is relatively thin, and the sealing end 102 is used to be inserted into the valve cavity 20a and cooperate with the cavity wall 204 to achieve sealing control.

[0041] In addition, the valve cavity 20a in this embodiment is a cylindrical cavity, and the inner wall surface of the corresponding cavity wall portion 204 is an arc-shaped surface. The sealing portion 1021 has an arc-shaped sealing surface 10211. The surface of the reinforcing rib 1022 facing the cavity wall portion 204 is a first arc-shaped surface, and the surface of the annular portion 1024 facing the cavity wall portion 204 is a second arc-shaped surface. The first arc-shaped surface, the second arc-shaped surface, and the sealing surface 10211 can be located on the same arc surface so that the annular portion 1024, the reinforcing rib 1022, and the sealing portion 1021 can all slide and engage circumferentially along the valve body 20.

[0042] It should be noted that the valve body 20 in this embodiment is described with three openings as an example. However, it can be understood that the number of openings can be two or more. For example, if only the first opening 204a and the third opening 204c are provided, the sealing part 1021 will have a blocking position. The first opening 204a can be blocked or opened. The valve stem 10 is provided with reinforcing ribs 1022 and sealing part 1021, which have the same function. They will not be listed one by one.

[0043] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A valve device, characterized in that, include: The valve body (20) has a valve cavity (20a) and includes a cavity wall portion (204) corresponding to the valve cavity (20a). The cavity wall portion (204) is provided with a plurality of openings communicating with the valve cavity (20a). The plurality of openings are distributed along the circumference of the valve body (20). The valve stem (10) includes a sealing part (1021). When the valve stem (10) rotates circumferentially, the sealing part (1021) can rotate to at least one blocking position, whereby the sealing part (1021) blocks one of the openings. The valve stem (10) also includes a reinforcing rib (1022). The sealing part (1021) and the reinforcing rib (1022) are distributed circumferentially along the valve stem (10). The reinforcing rib (1022) and any of the openings are spaced apart circumferentially on the valve body (20).

2. The valve device according to claim 1, characterized in that, The sealing part (1021) has an arc-shaped sealing surface (10211) for sealing the opening, and the thickness of the sealing part (1021) along the radial direction of the valve stem (10) is less than the radius of the sealing surface (10211).

3. The valve device according to claim 1, characterized in that, The plurality of openings include a first opening (204a) and a third opening (204c); the sealing part (1021) is capable of blocking the first opening (204a) to disconnect the first opening (204a) and the third opening (204c), and the sealing part (1021) is capable of opening the first opening (204a) to connect the first opening (204a) and the third opening (204c). The inner wall surface of the cavity wall portion (204) includes a first wall surface (2041) located between the first opening (204a) and the third opening (204c); the circumferential length of the first wall surface (2041) in the circumferential direction of the valve body (20) is not less than the rotational stroke of the sealing portion (1021), and the reinforcing rib (1022) corresponds to the first wall surface (2041) radially.

4. The valve device according to claim 3, characterized in that, The first wall surface includes a first side edge (2041a) and a second side edge (2041b) distributed circumferentially. When the sealing part (1021) blocks the first opening (204a), the reinforcing rib (1022) corresponds radially to the first side edge (2041a). When the sealing part (1021) fully opens the first opening (204a), the reinforcing rib (1022) corresponds radially to the second side edge (2041b).

5. The valve device according to claim 3 or 4, characterized in that, The reinforcing rib (1022) and the sealing part (1021) have an included angle α in the circumferential direction of the valve stem (10), and the included angle α is less than 150°.

6. The valve device according to claim 3 or 4, characterized in that, The valve body (20) includes a second opening (204b), and the first opening (204a), the second opening (204b), and the third opening (204c) are distributed sequentially along the circumference of the valve body (20); the sealing part (1021) has two sealing positions, namely a first sealing position and a second sealing position. At the first sealing position, the sealing part (1021) seals the first opening (204a), and at the second sealing position, the sealing part (1021) seals the second opening (204b). The valve body (20) further includes a first interface portion (201) having a first flow channel (201a), a second interface portion (202) having a second flow channel (202a), and a third interface portion (203) having a third flow channel (203a). The first interface portion (201), the second interface portion (202), and the third interface portion (203) are all connected to the cavity wall portion (204). The first flow channel (201a) is connected to the first opening (204a), the second flow channel (202a) is connected to the second opening (204b), and the third flow channel (203a) is connected to the third opening (204c).

7. The valve device according to any one of claims 1-4, characterized in that, The reinforcing rib (1022) is a columnar structure extending axially along the valve stem (10), and the sealing part (1021) is an arc-shaped plate. The thickness of the reinforcing rib (1022) along the radial direction of the valve stem (10) is equal to the thickness of the sealing part (1021) along the radial direction of the valve stem (10).

8. The valve device according to any one of claims 1-4, characterized in that, The valve stem (10) includes a valve stem body (101) and a sealing end (102) located at one axial end of the valve stem body (101). The sealing end (102) includes the reinforcing rib (1022) and the sealing part (1021). The sealing end (102) further includes an end plate (1023) and an annular portion (1024) distributed along the axial direction. The end plate (1023) is connected to the valve stem body (101). The sealing portion (1021) is connected along the axial direction between the end plate (1023) and the annular portion (1024). The reinforcing rib (1022) is connected along the axial direction between the end plate (1023) and the annular portion (1024).

9. The valve device according to claim 8, characterized in that, The sealing end (102) is an integral structure.

10. The valve device according to claim 9, characterized in that, The inner wall surface of the cavity wall portion (204) is an arc-shaped surface, the surface of the reinforcing rib (1022) facing the cavity wall portion (204) is a first arc-shaped surface, and the surface of the annular portion (1024) facing the cavity wall portion (204) is a second arc-shaped surface. The annular portion (1024), the sealing portion (1021), and the reinforcing rib (1022) can all slide in a circumferential fit along the valve body (20).

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