A ball valve

Abstract

The application discloses a ball valve, which comprises a valve core ball, the valve core ball comprises an inner cavity, a first flow-through port and a second flow-through port, the first flow-through port and the second flow-through port are communicated with the inner cavity; the central axis of the first flow-through port is defined as a third central axis, the sectional area of the section of at least a part of the inner cavity perpendicular to the third central axis is greater than the sectional area of the section of the first flow-through port perpendicular to the third central axis; the central axis of the second flow-through port is defined as a fourth central axis, the fourth central axis and the third central axis are arranged at an angle. In the above scheme, the sectional area of the section of at least a part of the inner cavity of the valve core ball perpendicular to the third central axis can be greater than the sectional area of the section of the first flow-through port perpendicular to the third central axis, the flow-through area of the inner cavity can be effectively increased, so that the flow resistance of the inner cavity can be reduced, and the flow-through capacity of the ball valve can be improved.

Description

Technical Field

[0001] This invention relates to the field of valve technology for refrigeration systems, and specifically to a ball valve. Background Technology

[0002] A ball valve includes a valve body, a valve core ball, a valve stem, and a drive component. The valve core ball is housed within the valve body, and the valve stem is connected to the outer wall of the valve core ball. The drive component is connected to the valve stem, and can drive the valve core ball to rotate via the valve stem. The valve core ball has an inner cavity, a first flow port, and a second flow port, both of which can communicate with the inner cavity. In related technologies, the flow resistance of the inner cavity of the valve core ball is relatively large.

[0003] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects remains a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this invention is to provide a ball valve in which the inner cavity of the valve core ball has relatively low flow resistance.

[0005] To solve the above-mentioned technical problems, the present invention provides a ball valve, including a valve core ball, the valve core ball including an inner cavity, a first flow port and a second flow port, both the first flow port and the second flow port being connected to the inner cavity; the central axis of the first flow port is defined as a third central axis, and the cross-sectional area of ​​at least a portion of the inner cavity perpendicular to the third central axis is greater than the cross-sectional area of ​​the first flow port perpendicular to the third central axis; the central axis of the second flow port is defined as a fourth central axis, and the fourth central axis and the third central axis are arranged at an angle.

[0006] In the above scheme, the cross-sectional area of ​​at least a portion of the inner cavity of the valve core ball perpendicular to the third central axis can be greater than the cross-sectional area of ​​the first flow port perpendicular to the third central axis, which can effectively increase the flow area of ​​the inner cavity, thereby reducing the flow resistance of the inner cavity and improving the flow capacity of the ball valve. Attached Figure Description

[0007] Figure 1 This is a simplified structural diagram of the ball valve provided in an embodiment of the present invention;

[0008] Figure 2 for Figure 1 Connection structure diagram of the central valve core ball, first connecting seat, second connecting seat, centering shaft and drive shaft;

[0009] Figure 3 This is a three-dimensional structural diagram of the first connecting seat;

[0010] Figure 4 for Figure 3 Top view;

[0011] Figure 5 for Figure 3 A sectional view;

[0012] Figure 6 This is a sectional view of the second connector.

[0013] Figure label:

[0014] 1000-Valve body assembly; 1100-Valve body component; 1110-Valve body; 1120-Connecting sleeve; 1130-Adapter; 1140-Connecting pipe; 1200-First connecting seat; 1210-Allowing hole; 1220-Wide neck; 1230-Narrow neck; 1240-First stepped surface; 1250-Allowing groove; 1260-Limiting block; 1270-Bearing; 1280-First mounting groove; 1300-Second connecting seat; 1310-Inner column; 1311-Second mounting groove; 1320-Outer ring; 1330-Connecting plate; 1331-First through hole; 1340-Groove;

[0015] 2000 - Valve core ball; 2100 - Inner cavity; 2200 - First flow port; 2210 - Third central axis; 2300 - Second flow port; 2310 - Fourth central axis; 2400 - Insertion hole; 2500 - Slot; 2600 - Valve core end;

[0016] 3000 - Centering axis; 3100 - First center axis;

[0017] 4000 - Drive assembly; 4100 - First drive housing; 4200 - Second drive housing; 4300 - Rotor assembly; 4400 - Transmission assembly; 4410 - Drive shaft; 4411 - Second central axis; 4420 - Gear ring; 4430 - Planetary carrier;

[0018] 5000 - Silencing block; 5100 - Second through hole;

[0019] 6000 - Sealing assembly; 6100 - Abutment part; 6200 - Seal; 6300 - Elastic element;

[0020] 7000 - First Takeover;

[0021] 8000 - Second Takeover;

[0022] 9000 - Third takeover. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] In the description of the embodiments of the present invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," "third," and "fourth" may explicitly or implicitly include one or more of that feature.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after the connection. "Rotary connection" refers to a connection where the two parts can rotate relative to each other after the connection.

[0026] The directional terms mentioned in the embodiments of the present invention, such as "inner" and "outer", are only for reference to the direction of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0027] In the description of embodiments of the present invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0028] Please refer to Figures 1-6 , Figure 1 This is a simplified structural diagram of the ball valve provided in an embodiment of the present invention; Figure 2 for Figure 1 Connection structure diagram of the central valve core ball, first connecting seat, second connecting seat, centering shaft and drive shaft; Figure 3 This is a three-dimensional structural diagram of the first connecting seat; Figure 4 for Figure 3 Top view; Figure 5 for Figure 3 A sectional view; Figure 6 This is a sectional view of the second connector.

[0029] like Figure 1As shown, an embodiment of the present invention provides a ball valve, including a valve body assembly 1000, a valve core ball 2000, a drive assembly 4000, and a sealing assembly 6000.

[0030] The valve body assembly 1000 includes a valve body component 1100. The valve body component 1100 forms the structural basis of the ball valve, and other components can be directly or indirectly mounted to it for integrated assembly. This embodiment of the invention does not limit the specific structural form of the valve body component 1100. In practical applications, those skilled in the art can select the appropriate form according to specific needs, as long as it meets the requirements of use.

[0031] In some alternative implementations, such as Figure 1 As shown, the valve body component 1100 may include a valve body 1110, a connecting sleeve 1120, an adapter 1130, and a pipe connection 1140.

[0032] Reference Figure 1 Regarding the orientation and positional relationship, the connecting sleeve 1120 can be located on the lower side of the valve body 1110 and can be fixedly connected to the valve body 1110, such as by welding. The adapter 1130 can be fitted onto the valve body 1110 and can be fixedly connected to the valve body 1110, such as by welding, interference fit, riveting, or screw connection. The pipe connection 1140 can be fixedly connected to the adapter 1130, such as by threaded connection or welding.

[0033] Both the pipe connection part 1140 and the connecting sleeve 1120 are used to connect the pipe. Figure 1 In the implementation of this invention, the ball valve provided is a three-way valve, and therefore, it can be configured with three connecting pipes, namely a first connecting pipe 7000, a second connecting pipe 8000, and a third connecting pipe 9000. In this case, the number of connecting pipe connection portions 1140 can be two, and the two connecting pipe connection portions 1140 can be distributed at different positions around the valve body 1110. The two connecting pipe connection portions 1140 can be used to connect the first connecting pipe 7000 and the third connecting pipe 9000 respectively, and the connecting sleeve 1120 is used to connect the second connecting pipe 8000. The connection method for each connecting pipe can be welding or the like.

[0034] It should be understood that the ball valve provided in the embodiments of the present invention is not limited to the three-way valve described above, but may also be a two-way valve, a four-way valve, etc. In this case, the structural form of the aforementioned valve body component 1100 may also be adapted.

[0035] The valve core ball 2000 is disposed within the valve body component 1100 and is capable of rotating within the valve body component 1100. The central axis of rotation of the valve core ball 2000 is defined as the first central axis 3100. Furthermore, the aforementioned sealing assembly 6000 is provided between the valve core ball 2000 and the connecting pipe connection 1140 to ensure the sealing between the valve core ball 2000 and the connecting pipe connection 1140, thereby reducing internal leakage.

[0036] In some alternative implementations, the sealing assembly 6000 may include an abutment 6100, a seal 6200, and an elastic member 6300.

[0037] The abutment portion 6100 can generally be cylindrical, and it can be fitted over a portion of the pipe connection portion 1140, and can contact the outer wall surface of the valve core ball 2000. The contact portion 6100 and the valve core ball 2000 can have line contact, or they can have surface contact; this is not limited here. The abutment portion 6100 can be made of a rigid material, such as metal. Alternatively, the abutment portion 6100 can be made of a flexible material, such as rubber.

[0038] The sealing element 6200 can be a sealing ring made of flexible materials such as rubber or silicone. It can be disposed between the abutment part 6100 and the pipe connection part 1140 to ensure the sealing between the abutment part 6100 and the pipe connection part 1140.

[0039] The elastic element 6300 can be a spring. Alternatively, the elastic element 6300 can also be an elastomer made of materials with certain elastic deformation properties, such as silicone, rubber, or latex. The elastic element 6300 can be disposed between the pipe connection portion 1140 and the abutment portion 6100, and is used to apply an axial clamping force to the abutment portion 6100 to drive the abutment portion 6100 and the valve core ball 2000 into tight contact, thereby improving the sealing effect between the abutment portion 6100 and the valve core ball 2000.

[0040] In some alternative implementations, the drive component 4000 may specifically employ an electromagnetic drive structure, including an electromagnetic coil (not shown in the figure), a first drive housing 4100, a second drive housing 4200, a rotor component 4300, and a transmission component 4400.

[0041] Reference Figure 1Regarding the orientation and positional relationship, the first drive housing 4100 can be located above the second drive housing 4200, and the first drive housing 4100 can be fixedly connected to the second drive housing 4200, for example, by welding; the second drive housing 4200 is located above the valve body 1110, and the second drive housing 4200 can be fixedly connected to the valve body 1110, for example, by welding. The rotor component 4300 can be disposed inside the first drive housing 4100, and the electromagnetic coil can be sleeved on the first drive housing 4100 to apply rotational driving force to the rotor component 4300. The transmission component 4400 is disposed in the second drive housing 4200, and the rotor component 4300 can be connected to the transmission component 4400 to drive the transmission component 4400 to operate. The transmission component 4400 has a drive shaft 4410, which can be connected to the valve core ball 2000 to drive the valve core ball 2000 to rotate, thereby switching the usage state of the ball valve provided in the embodiment of the present invention.

[0042] Here, the embodiments of the present invention do not limit the specific structural form of the transmission component 4400. In practical applications, those skilled in the art can select according to specific needs, as long as it can meet the requirements of use. For example, the transmission component 4400 can be a planetary gear structure, including at least one gear ring 4420 and at least one planet carrier 4430, and the aforementioned drive shaft 4410 can be connected to the planet carrier 4430.

[0043] It should be understood that, in addition to the electromagnetic drive structure described above, the drive component 4000 in the embodiments of the present invention may also adopt a motor drive structure, etc.

[0044] In traditional designs, the central axis of the drive shaft is the rotation center line of the valve core ball. The drive shaft is connected to the outer wall of the valve core ball, which is assembled within the valve body via the drive shaft. This connection structure is a floating structure. When the ball valve is fully closed, the valve core ball easily moves within the valve body due to the pressure difference, resulting in excessive pressure on the sealing assembly. Consequently, when the valve core ball is driven to rotate again, the friction between the valve core ball and the sealing assembly is very high, leading to severe wear. Over long-term use, the sealing assembly is prone to failure, resulting in unreliable contact between the sealing assembly and the valve core ball, thus causing internal leakage.

[0045] In view of this, the ball valve provided in the embodiments of the present invention may further include a centering shaft 3000.

[0046] Combination Figure 2The valve core ball 2000 may have a through-hole 2400, into which the centering shaft 3000 can pass and be fixedly connected. Specific fixing methods include, for example, interference fit or welding. After installation, both axial ends of the centering shaft 3000 can extend from the valve core ball 2000, and both axial ends of the centering shaft 3000 are rotatably connected to the valve body assembly 1000. The central axis of the centering shaft 3000 can serve as the first central axis 3100, and the central axis of the drive shaft 4410 can serve as the second central axis 4411, with the first central axis 3100 and the second central axis 4411 being parallel. The valve core ball 2000 may also have a slot 2500 into which the drive shaft 4410 can be inserted and fixedly connected to the valve core ball 2000. Specific fixing methods include, for example, interference fit or welding. The drive shaft 4410 can be driven to drive the valve core ball 2000 to rotate around the first central axis 3100 within the valve body component 1100.

[0047] In this embodiment of the invention, the ball valve is provided with an independent centering shaft 3000, which passes through the valve core ball. Both axial ends of the centering shaft 3000 are rotatably connected to the valve body assembly 1000. Thus, the valve core ball 2000 effectively has two connection points on the first central axis 3100, significantly improving the installation reliability of the valve core ball 2000 within the valve body assembly 1100. When the ball valve is fully closed, the valve core ball 2000 is less likely to move within the valve body assembly 1100 due to pressure differences, thus preventing excessive pressure on the sealing assembly 6000. Consequently, the friction between the valve core ball 2000 and the sealing assembly 6000 during rotation is relatively small, resulting in less wear on the sealing assembly 6000. This ensures reliable contact between the sealing assembly 6000 and the valve core ball 2000 for a relatively long period, thereby reducing internal leakage.

[0048] In some alternative implementations, the valve body assembly 1000 may include a first connecting seat 1200. The first connecting seat 1200 and the valve body component 1100 may be fixedly connected or limited in their connection. In short, after the first connecting seat 1200 and the valve body component 1100 are connected, there will be virtually no relative displacement between them.

[0049] Specifically, such as Figures 3-5 As shown, the first connecting seat 1200 may include a thick neck 1220 and a thin neck 1230, the thin neck 1230 being located on the side of the thick neck 1220 facing the valve core ball 2000; a first stepped surface 1240 may be formed between the thick neck 1220 and the thin neck 1230 in the first connecting seat 1200. Furthermore... Figure 1The first connecting seat 1200 can be axially stopped by the first stepped surface 1240 and the valve body component 1100 (specifically the valve body 1110) to limit the relative position between the first connecting seat 1200 and the valve body 1110.

[0050] Furthermore, the first connecting seat 1200 can also be connected to the valve body 1110 by welding, snap-fitting, riveting, or other connection methods to achieve a fixed connection or limiting connection between the first connecting seat 1200 and the valve body component 1100. Taking welding as an example, the solder can be located at any of the following positions: between the outer peripheral wall of the thick neck and the valve body 1110, between the first step surface 1240 and the valve body 1110, and between the outer peripheral wall of the thin neck and the valve body 1110.

[0051] The first connecting seat 1200 may also be provided with a first mounting groove 1280, and one axial end of the centering shaft 3000 may be rotatably connected in the first mounting groove 1280 so as to realize the rotation of the centering shaft 3000 relative to the valve body assembly 1000.

[0052] Combination Figure 2 A bearing 1270 can also be installed in the first mounting groove 1280, and the centering shaft 3000 can be connected to the first connecting seat 1200 through the bearing 1270. In this way, the rotational resistance of the centering shaft 3000 can be relatively small, and the rotational smoothness of the centering shaft 3000 can be relatively high, which helps to reduce the energy consumption of the ball valve provided in this embodiment of the invention during use. Specifically, the bearing 1270 can be a needle roller bearing, a sliding bearing, a ball bearing, etc.

[0053] The first connecting seat 1200 may be provided with a clearance hole 1210, and the drive shaft 4410 may pass through the clearance hole 1210 to avoid interference with the first connecting seat 1200. Figure 4 Specifically, the clearance hole 1210 can be an arc-shaped hole. The two ends of the arc-shaped hole can limit the rotation of the drive shaft 4410 to limit the rotational position of the valve core ball 2000 within the valve body component 1100. It should be understood that the shape of the clearance hole 1210 is not limited to the arc-shaped hole mentioned above. It can also be a rectangular hole or other shapes of hole, as long as it allows the drive shaft 4410 to pass through without interfering with the rotation of the drive shaft 4410.

[0054] In some alternative implementations, such as Figure 2 and Figure 5As shown, the end of the first connecting seat 1200 facing the valve core ball 2000 may also be provided with a relief groove 1250, and a portion of the valve core ball 2000 may be located in the relief groove 1250. This avoids installation interference between the first connecting seat 1200 and the valve core ball 2000. Simultaneously, it improves the compactness of the installation between the valve core ball 2000 and the first connecting seat 1200, thereby facilitating the reduction of the size of the ball valve provided in the embodiment of the invention in the direction of the first central axis 3100, and enabling a miniaturized design of the ball valve.

[0055] The aforementioned clearance groove 1250 can specifically be located in the narrow neck 1230 of the first connecting seat 1200. Of course, it can also extend into the wide neck 1220.

[0056] In some alternative implementations, such as Figure 3 As shown, a limiting block 1260 may also be provided at the end of the first connecting seat 1200 away from the valve core ball 2000. A toothed ring 4420 of the drive assembly 4000 may be provided with a limiting groove, and the limiting block 1260 can be inserted into the limiting groove to limit the circumferential assembly of the toothed ring 4420.

[0057] It should be understood that in some other implementations of the present invention, the gear ring 4420 can also be installed by other structures, that is, there may be no structural connection between the gear ring 4420 and the first connecting seat 1200. In this case, the aforementioned limiting block 1260 may not be provided, and the structure of the first connecting seat 1200 may be relatively simple.

[0058] In some alternative implementations, the valve body assembly 1000 may further include a second connecting seat 1300, which can be fixedly connected or limitedly connected to the valve body component 1100. In short, after connection, there is essentially no relative displacement between the second connecting seat 1300 and the valve body component 1100. Figure 1 The second connecting seat 1300 may be located in the connecting sleeve 1120, and it can be connected to the connecting sleeve 1120 by welding or other means.

[0059] like Figure 6 As shown, the second connecting seat 1300 may be provided with a second mounting groove 1311, and the other axial end of the centering shaft 3000 may be rotatably connected in the second mounting groove 1311 so as to realize the rotation of the centering shaft 3000 relative to the valve body assembly 1000.

[0060] Similar to the first connecting seat 1200 mentioned above, a bearing can also be installed in the second mounting groove 1311 of the second connecting seat 1300 to improve the smoothness of rotation of the centering shaft 3000.

[0061] In some alternative implementations, the second connector 1300 may include an inner post portion 1310, an outer ring portion 1320, and a connecting plate portion 1330.

[0062] The inner column portion 1310 may be located inside the outer ring portion 1320, and the connecting plate portion 1330 may connect the inner column portion 1310 and the outer ring portion 1320. The aforementioned second mounting groove 1311 may be provided in the inner column portion 1310, that is, the other axial end of the centering shaft 3000 may be rotatably connected to the inner column portion 1310. The connecting plate portion 1330 may be provided with a first through hole 1331 for fluid passage. The number of first through holes 1331 may be one or more, which is not limited here.

[0063] Both ends of the outer ring portion 1320 can protrude axially from the connecting plate portion 1330, that is, the second connecting seat 1300 can form a groove 1400 in the area where the connecting plate portion 1330 is located, in order to increase the flow area of ​​the fluid.

[0064] It should be understood that in practical use, only one of the two axial ends of the outer ring portion 1320 may protrude axially from the connecting plate portion 1330, which is also feasible. As for the inner column portion 1310, its two axial ends may or may not protrude from the connecting plate portion 1330; this is not explicitly limited here. In the implementation shown in the attached drawings, as... Figure 6 As shown, the two ends of the inner column portion 1310 can protrude from the connecting plate portion 1330; thus, the axial dimension of the inner column portion 1310 is relatively large, the structural strength of the second connecting seat 1300 can be relatively high, and the connection reliability between the inner column portion 1310 and the centering shaft 3000 can also be relatively high.

[0065] In this embodiment of the invention, both the first connecting seat 1200 and the second connecting seat 1300 can be integrally formed structures, for example, they can be manufactured using processes such as machining, integral injection molding, or integral casting, which simplifies the molding process. Of course, either of them can also be a separate structure; taking the second connecting seat 1300 as an example of a separate structure, the inner column portion 1310, the outer ring portion 1320, and the connecting plate portion 1330 can all be manufactured separately and then assembled by welding or other methods, which is also feasible.

[0066] In some alternative implementations, the ball valve provided in this embodiment of the invention may further include a silencer block 5000. For example... Figure 1 As shown, the silencing block 5000 can also be disposed in the connecting sleeve 1120, and the silencing block 5000 can be located on the side of the second connecting seat 1300 away from the valve core ball 2000, in order to reduce the flow noise of the fluid.

[0067] The silencing block 5000 can specifically be a perforated metal plate, with a second through hole 5100 in its central area to reduce flow resistance. Of course, the second through hole 5100 in the central area may also be absent.

[0068] In some alternative implementations, such as Figure 2 As shown, the valve core ball 2000 may be provided with an inner cavity 2100, a first flow port 2200 and a second flow port 2300. Both the first flow port 2200 and the second flow port 2300 may be connected to the inner cavity 2100 for introducing fluid into the inner cavity 2100 or drawing fluid out of the inner cavity 2100.

[0069] The aforementioned insertion hole 2400 can be connected to the inner cavity 2100 and can be divided into two sections by the inner cavity 2100. In this way, after the centering shaft 3000 is inserted into the insertion hole 2400, a part of the centering shaft 3000 can be located in the inner cavity 2100, which will increase the running resistance of the fluid in the inner cavity 2100 to a certain extent.

[0070] To address this, this embodiment of the invention chooses to increase the flow area of ​​the inner cavity 2100 to reduce the increase in flow resistance caused by the centering shaft 3000. Specifically, the central axis of the first flow port 2200 can be the third central axis 2210, and the cross-sectional area of ​​at least a portion of the inner cavity 2100 perpendicular to the third central axis 2210 can be greater than the cross-sectional area of ​​the first flow port 2200 perpendicular to the third central axis 2210; thus, the flow area of ​​the inner cavity 2100 can be effectively increased.

[0071] It should be understood that the above-mentioned scheme of increasing the flow area of ​​the inner cavity 2100 also applies to the implementation method where the valve core ball 2000 is driven to rotate only by the drive shaft 4410 without the centering shaft 3000. In this case, since there is no centering shaft 3000 in the inner cavity 2100, the increase in the flow area of ​​the inner cavity 2100 will be more conducive to reducing flow resistance. When the centering shaft 3000 is not set, the central axis of the drive shaft 4410 is the first central axis.

[0072] The central axis of the second flow port 2300 can be the fourth central axis 2310. The fourth central axis 2310 and the third central axis 2210 can be set at an angle, that is, the fluid inflow direction and the fluid outflow direction of the valve core ball 2000 can be set at an angle, such as 90 degrees.

[0073] The valve core ball 2000 may include two valve core ends 2600 disposed opposite each other along a first central axis 3100, and at least one of the two valve core ends 2600 may be provided with at least one second flow port 2300. In the implementation shown in the figures, as... Figure 2As shown, the second flow port 2300 may be entirely located in the valve core end 2600 on the lower side of the valve core ball 2000. Alternatively, in some other implementations of this invention, the second flow port 2300 may be simultaneously located in the valve core ends 2600 on both the upper and lower sides of the valve core ball 2000.

[0074] Each valve core end 2600 may be provided with at least two second flow ports 2300, and the opening position of each second flow port 2300 may avoid the centering shaft 3000. Furthermore, each second flow port 2300 of the same valve core end 2600 may be arranged around the first central axis 3100 to improve the uniformity of fluid flow.

[0075] like Figure 1 As shown, the second flow port 2300 can be a normally open opening, which can be connected to the second connecting pipe 8000, while the orientation of the first flow port 2200 can change with the rotation of the valve core ball 2000. Figure 1 In the indicated state, the first flow port 2200 can be connected to the first connecting pipe 7000, and at this time, the first connecting pipe 7000 can be connected to the second connecting pipe 8000. When it is necessary to switch the connection state of the ball valve, the valve core ball 2000 can be driven to rotate by the drive shaft 4410; for example, when the first flow port 2200 is connected to the third connecting pipe 9000, the second connecting pipe 8000 and the third connecting pipe 9000 can be connected; or, for example, when the first flow port 2200 is neither connected to the third connecting pipe 9000 nor to the second connecting pipe 8000, the ball valve provided in this embodiment of the invention can be in the fully closed state.

[0076] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A ball valve, characterized in that The valve core ball includes an inner cavity, a first flow port and a second flow port, both of which are connected to the inner cavity. The central axis of the first flow port is defined as the third central axis, and the cross-sectional area of ​​at least a portion of the inner cavity perpendicular to the third central axis is greater than the cross-sectional area of ​​the first flow port perpendicular to the third central axis. The central axis of the second flow port is defined as the fourth central axis, and the fourth central axis and the third central axis are set at an angle.

2. The ball valve according to claim 1, wherein The rotation axis of the valve core ball is defined as the first central axis. The valve core ball has two valve core ends arranged opposite to each other along the first central axis, and at least one of the two valve core ends is provided with the second flow port.

3. The ball valve of claim 2, wherein The valve core end is provided with at least two second flow ports, and each second flow port is arranged around the first central axis.

4. Ball valve according to any of claims 1-3, characterized in that It also includes a valve body assembly and a centering shaft. The valve core ball is disposed inside the valve body assembly, and the centering shaft passes through the valve core ball. Both axial ends of the centering shaft are rotatably connected to the valve body assembly. The central axis of the centering shaft serves as the first central axis, and a portion of the centering shaft is located in the inner cavity.

5. The ball valve of claim 4, wherein, It also includes a drive assembly, which includes a drive shaft, the central axis of which serves as a second central axis. The first central axis and the second central axis are parallel. The drive shaft is connected to the valve core ball, and the drive shaft can drive the valve core ball to rotate around the first central axis.

6. The ball valve of claim 4, wherein, The valve body assembly includes a valve body component and a first connecting seat. The first connecting seat and the valve body component are fixedly connected or limitedly connected. One axial end of the centering shaft is rotatably connected to the first connecting seat. The first connecting seat is provided with a clearance hole, and the drive shaft passes through the clearance hole.

7. The ball valve of claim 6, wherein The first connecting seat includes a thick neck and a thin neck. The thin neck is located on the side of the thick neck facing the valve core ball. The first connecting seat forms a first stepped surface between the thick neck and the thin neck. The first stepped surface can cooperate with the valve body component to provide axial stop.

8. The ball valve of claim 6, wherein, The end of the first connecting seat facing the valve core ball is also provided with a clearance groove, and a portion of the valve core ball is located in the clearance groove.

9. The ball valve of claim 6, wherein, The first connecting seat has a limit block at one end away from the valve core ball. The ball valve includes a drive assembly, the drive assembly includes a gear ring, the gear ring has a limit groove, and the limit block is inserted into the limit groove.

10. The ball valve of claim 4, wherein, The valve body assembly further includes a second connecting seat, which is fixedly connected to or limited to the valve body component, and the other axial end of the centering shaft is rotatably connected to the second connecting seat. The second connecting seat includes an inner column portion, an outer ring portion, and a connecting plate portion. The other axial end of the centering shaft is rotatably connected to the inner column portion. The connecting plate portion connects the inner column portion and the outer ring portion. Both axial ends of the outer ring portion protrude axially from the connecting plate portion. The connecting plate portion is provided with a first through hole.

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