Rotary three-way valve

Abstract

The utility model provides a rotary three-way valve, and relates to the technical field of valves, an elastic assembly is arranged in a rotary shaft, elastic force generated by the elastic assembly acts on a rotor to enable the rotor to tightly press a stator, an ejector rod assembly is arranged in the rotary shaft, and the ejector rod assembly is connected with the elastic assembly. The elastic force of the elastic assembly to the rotor can be freely adjusted by driving the ejector rod assembly to move relative to the rotating shaft, so that the assembling pressure between the stator and the rotor is freely adjusted, and the technical problem that the assembling pressure of a disc spring in a rotating three-way valve cannot be freely adjusted in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a rotary three-way valve. Background Technology

[0002] Rotary three-way valves, as important components in fluid control systems, are widely used in various industries such as chemical, pharmaceutical, and food processing. In traditional rotary three-way valve designs, power transmission primarily relies on a planetary gear system connecting the output end and the rotating shaft to achieve fluid channel switching. During assembly, disc springs are commonly used to adjust the pressure between components, ensuring tight contact of critical mating surfaces and maintaining a relatively constant assembly pressure environment. Furthermore, to ensure system safety and stability, existing rotary three-way valves are typically equipped with external pressure measuring devices to monitor pressure changes throughout the pipeline in real time.

[0003] Specifically, in practical applications, when it is necessary to change the fluid flow direction, the motor drives the rotating shaft to rotate, transmitting the motion to the valve core through a planetary gear mechanism. This causes the valve core to rotate relative to the valve body, thereby changing the fluid flow path. Simultaneously, a disc spring is installed between the valve core and the valve body to provide the necessary preload, ensuring a tight seal between the valve core and the valve seat. An external pressure sensor is directly installed on the pipeline, continuously collecting and reporting pressure information within the pipe, allowing operators to promptly understand the system's operating status.

[0004] While the above design meets certain functional requirements, it also reveals some limitations in specific application scenarios. For example, the pressure during assembly is adjusted by using disc springs to ensure a close fit between mating planes, but this is a fixed pressure and cannot be adjusted. This cannot be well met when the pipeline needs to change the negative pressure value. Utility Model Content

[0005] The purpose of this invention is to provide a rotary three-way valve to alleviate the technical problem that the disc spring inside the rotary three-way valve cannot freely adjust the assembly pressure in the prior art.

[0006] The rotary three-way valve provided by this utility model includes: a stator, a rotor, a rotating shaft, an elastic component, and a push rod assembly;

[0007] The rotor is disposed at the bottom of the stator and is connected to the top of the rotating shaft, which is configured to rotate along its own axis.

[0008] The elastic component is disposed inside the rotating shaft, and the elastic force generated by the elastic component can act on the rotor so that the rotor is pressed against the stator;

[0009] The push rod assembly is disposed within the rotating shaft and is connected to the elastic component. The push rod assembly is configured to move relative to the rotating shaft to adjust the elastic force of the elastic component.

[0010] In an optional implementation,

[0011] The elastic component includes an elastic element and a spring cover;

[0012] The rotating shaft is provided with a first receiving groove, and the spring cover is disposed in the first receiving groove;

[0013] One end of the elastic element is connected to the spring cover, and the other end of the elastic element is connected to the top rod assembly. The elastic force generated by the elastic element is transmitted to the rotor through the spring cover.

[0014] In an optional implementation,

[0015] The push rod assembly includes a spring support and a push screw;

[0016] The rotating shaft is provided with a second receiving groove that communicates with the first receiving groove. One end of the spring support extends into the first receiving groove, and the other end of the spring support extends into the second receiving groove and is connected to the set screw located in the second receiving groove.

[0017] The spring support extends outward to form a connecting platform, and the end of the elastic element away from the spring cover is connected to the connecting platform;

[0018] The set screw is threadedly connected to the wall of the second receiving groove.

[0019] In an optional implementation,

[0020] The rotary three-way valve also includes a water platform;

[0021] The water platform is disposed between the rotor and the spring cover, and the top surface of the water platform is connected to the rotor. A steel ball is disposed at the bottom of the water platform, and the steel ball is connected to the bottom of the water platform and the top surface of the spring cover.

[0022] In an optional implementation,

[0023] The rotary three-way valve also includes a pressure plate and a pressure sensor;

[0024] The top of the stator has a recessed groove, the pressure sensor is disposed in the groove, and the pressure plate is disposed on the stator to confine the pressure sensor in the groove.

[0025] In an optional implementation,

[0026] The rotary three-way valve also includes a drive assembly and a coupling assembly;

[0027] The drive rod of the drive assembly is connected to the coupling assembly, and the coupling assembly is connected to the rotating shaft. The driving force generated by the drive assembly is transmitted to the rotating shaft through the coupling assembly to drive the rotor to rotate.

[0028] In an optional implementation,

[0029] The coupling assembly includes a top coupling, a middle coupling, and a shaft end coupling;

[0030] The drive assembly includes a drive motor, the drive shaft of the drive motor is connected to the shaft end coupling, the top of the shaft end coupling is connected to the middle coupling, the top of the middle coupling is connected to the top coupling, and the top coupling is connected to the bottom of the rotating shaft.

[0031] In an optional implementation,

[0032] The drive assembly also includes a motor mounting base and a guide sleeve;

[0033] One end of the motor mounting base is connected to the drive motor, and the other end of the motor mounting base is connected to the guide sleeve, which covers the rotating shaft;

[0034] The motor mounting base is equipped with a bearing, which is rotatably connected to the rotating shaft.

[0035] In an optional implementation,

[0036] The rotary three-way valve also includes a encoder component and a detection component;

[0037] The code disk component rotates synchronously with the drive motor, and the detection component is mounted on the motor mounting base. The detection component is used to detect the position of the code disk component.

[0038] In an optional implementation,

[0039] The rotary three-way valve also includes a code disk holder;

[0040] The code disk holder is connected to the drive shaft of the drive motor, and the code disk holder is connected to the code disk component.

[0041] The rotary three-way valve provided by this utility model has an elastic component inside the rotating shaft. The elastic force generated by the elastic component acts on the rotor, causing the rotor to press against the stator. A push rod assembly is also provided inside the rotating shaft. The push rod assembly is connected to the elastic component. By moving the push rod assembly relative to the rotating shaft, the elastic force of the elastic component on the rotor can be freely adjusted, thereby freely adjusting the assembly pressure between the stator and the rotor. This alleviates the technical problem in the prior art where the disc spring inside the rotary three-way valve cannot freely adjust the assembly pressure. Attached Figure Description

[0042] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 A cross-sectional view of the overall structure of the rotary three-way valve provided in this embodiment of the utility model;

[0044] Figure 2 A schematic diagram of the overall structure of the rotary three-way valve provided in this embodiment of the utility model;

[0045] Figure 3 A schematic diagram of the overall structure of the rotary three-way valve provided in an embodiment of this utility model from another perspective;

[0046] Figure 4 This is a schematic diagram of the internal structure of the stator in the rotary three-way valve provided in an embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of the stator structure in a rotary three-way valve provided in an embodiment of the present invention, viewed from another perspective.

[0048] Icons: 1-Pressure plate; 2-Screw; 3-Pressure sensor; 4-Stator; 5-Rotor; 6-Level platform; 7-Steel ball; 8-Spring cover; 9-Elastic element; 10-Spring support; 11-Bearing; 12-Rotating shaft; 13-Guide sleeve; 14-Setting screw; 15-Top coupling; 16-Middle coupling; 17-Shaft end coupling; 18-Code disk component; 19-Code disk fixing seat; 20-Detection component; 21-Motor mounting seat; 22-Drive motor; 23-First passage; 24-Second passage; 25-Third passage. Detailed Implementation

[0049] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0050] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0053] like Figure 1 , Figure 2 and Figure 3 As shown, the rotary three-way valve provided in this embodiment includes: a stator 4, a rotor 5, a rotating shaft 12, an elastic component, and a push rod component.

[0054] Among them, such as Figure 4 , Figure 5 As shown, the stator 4 has three valve ports, which correspond to three liquid flow channels, namely the first passage 23, the second passage 24 and the third passage 25. The three liquid flow channels correspond to three liquid inlets and outlets at the bottom of the stator 4. The rotor 5 has a connecting groove at the top, which allows two of the liquid inlets and outlets to be connected. By rotating the rotor 5, the connection of two of the valve ports of the stator 4 can be controlled.

[0055] It is important to note that one of the pathways is connected to the atmosphere to ensure that there is no pressure difference between the whole system and the atmosphere, thus ensuring the accuracy of pressure sensor 3. At the same time, it is connected to the overall environment to monitor the pressure inside the valve body as well as the pressure of the overall pipeline.

[0056] The rotor 5 is located at the bottom of the stator 4 and is connected to the top of the rotating shaft 12. The rotating shaft 12 is configured to rotate along its own axis, thereby driving the rotor 5 to rotate together with the rotating shaft 12 to control the opening and closing of the valve port.

[0057] The elastic component is located inside the rotating shaft 12, and the elastic force generated by the elastic component can act on the rotor 5 so that the rotor 5 is pressed against the stator 4. The elastic force of the elastic component is the assembly clamping force between the rotor 5 and the stator 4.

[0058] The push rod assembly is located inside the rotating shaft 12 and is connected to the elastic component. The push rod assembly is configured to move relative to the rotating shaft 12. By moving the push rod assembly, the elastic compression of the elastic component is adjusted, the elastic force of the elastic component is adjusted, and thus the assembly clamping force between the rotor 5 and the stator 4 is adjusted, so as to realize the free adjustment of the assembly pressure according to different working conditions.

[0059] The rotary three-way valve provided in this embodiment uses an elastic component inside the rotary shaft 12 to generate a spring force that acts on the rotor 5, causing the rotor 5 to press against the stator 4. A push rod assembly is also provided inside the rotary shaft 12 and connected to the elastic component. By moving the push rod assembly relative to the rotary shaft 12, the magnitude of the spring force exerted by the elastic component on the rotor 5 can be freely adjusted, thereby freely adjusting the assembly pressure between the stator 4 and the rotor 5. This alleviates the technical problem in the prior art where the disc spring inside the rotary three-way valve cannot freely adjust the assembly pressure.

[0060] Based on the above embodiments, in an optional implementation, the elastic component in the rotary three-way valve provided in this embodiment includes an elastic element 9 and a spring cover 8; the rotary shaft 12 is provided with a first receiving groove, the spring cover 8 is disposed in the first receiving groove, the spring cover 8 has a cap-shaped structure, one end of the elastic element 9 extends into the spring cover 8 and is connected to the spring cover 8, the other end of the elastic element 9 is connected to the push rod assembly, the elastic element 9 is specifically configured as a compression spring, the elastic force generated by the elastic element 9 is transmitted to the rotor 5 through the spring cover 8, thereby pressing the rotor 5 against the stator 4.

[0061] Regarding the structure and shape of the push rod assembly, specifically:

[0062] The push rod assembly includes a spring support 10 and a push screw 14. The rotating shaft 12 is specifically a hollow structure, and the rotating shaft 12 is provided with a second receiving groove that communicates with the first receiving groove. The width of the second receiving groove is smaller than the width of the first receiving groove. One end of the spring support 10 extends into the first receiving groove, and the other end of the spring support 10 extends into the second receiving groove and is connected to the push screw 14 located in the second receiving groove. The spring support 10 is a rod-shaped structure, and the outer surface of the spring support 10 extends outward to form a connecting platform. The end of the elastic member 9 away from the spring cover 8 is connected to the connecting platform, thereby using the spring support 10 to support the elastic member 9. The push screw 14 is threadedly connected to the groove wall of the second receiving groove. By screwing the push screw 14, the push screw 14 can be moved in the second receiving groove. Since the push screw 14 abuts against the spring support 10, the push screw 14 can drive the spring support 10 to move, adjust the compression of the elastic member 9, and thus adjust the assembly clamping force of the rotor 5 on the stator 4.

[0063] In an optional embodiment, the rotary three-way valve further includes a water platform 6; the water platform 6 is disposed between the rotor 5 and the spring cover 8, and the top surface of the water platform 6 is connected to the rotor 5, and the bottom of the water platform 6 is provided with steel balls 7, the bottom of the steel balls 7 is connected to the top surface of the spring cover 8, and the steel balls 7 and the water platform 6 are placed on the spring cover 8 to adjust the level.

[0064] In an optional embodiment, the rotary three-way valve further includes a pressure plate 1 and a pressure sensor 3; a recessed groove is formed on the top of the stator 4, and the pressure sensor 3 is placed in the groove. After the pressure sensor 3 is installed in the groove, the pressure plate 1 is placed on the stator 4, thereby confining the pressure sensor 3 in the groove, making the pressure sensor 3 and the stator 4 an integral unit. The built-in pressure sensor 3 ensures that there is no pressure difference between the whole and the atmosphere, ensuring the accuracy of the pressure sensor 3. At the same time, it is connected to the overall environment, monitoring the internal pressure of the valve body and the pressure of the overall pipeline, avoiding dead volume liquid and reducing the occurrence of cross-contamination.

[0065] In an optional embodiment, the rotary three-way valve further includes a drive assembly and a coupling assembly; the drive rod of the drive assembly is connected to the coupling assembly, the coupling assembly is connected to the rotating shaft 12, and the driving force generated by the drive assembly is transmitted to the rotating shaft 12 through the coupling assembly to drive the rotor 5 to rotate.

[0066] Specifically, the coupling assembly includes a top coupling 15, a middle coupling 16, and a shaft-end coupling 17; the drive assembly includes a drive motor 22, the drive shaft of which is connected to the shaft-end coupling 17, and the top of the shaft-end coupling 17 is connected to the middle coupling 16. Specifically, the top of the shaft-end coupling 17 extends upward to have an insertion protrusion, corresponding to a slot provided at the bottom of the middle coupling 16. The insertion protrusion extends into the slot, realizing the connection between the shaft-end coupling 17 and the middle coupling 16. The coupling 16 is snapped together, and the top of the middle coupling 16 is connected to the top coupling 15. Similarly, the middle coupling 16 and the top coupling 15 are also snapped together through protrusions and slots. The top coupling 15 is connected to the bottom of the rotating shaft 12. The presence of the top coupling 15, the middle coupling 16, and the shaft end coupling 17 makes the drive motor 22 not completely concentric with the overall upper assembly, which facilitates sectional maintenance, replacement, and assembly; reduces positioning accuracy and machining level, and reduces machining costs.

[0067] In an optional embodiment, the drive assembly further includes a motor mounting base 21 and a guide sleeve 13; one end of the motor mounting base 21 is connected to the drive motor 22, and the other end of the motor mounting base 21 is connected to the guide sleeve 13. The guide sleeve 13 covers the rotating shaft 12 and guides the rotating shaft 12. The screw 2 passes through the pressure plate 1 and the stator 4 and extends into the guide sleeve 13 to connect the pressure plate 1, the stator 4 and the guide sleeve 13 into one unit. A bearing 11 is installed on the motor mounting base 21 and is rotatably connected to the rotating shaft 12 so that the bearing 11 can rotate freely.

[0068] In an optional embodiment, the rotary three-way valve further includes a encoder component 18 and a detection component 20; the encoder component 18 rotates synchronously with the drive motor 22, and the detection component 20 is mounted on the motor mounting base 21. The detection component 20 is specifically configured as a photoelectric switch, and the detection component 20 is used to detect the position of the encoder component 18. Specifically, the encoder component 18 has a disc structure with a through gap. The zero position of the drive motor 22 is determined by the cooperation between the photoelectric switch and the encoder component 18.

[0069] In an optional embodiment, the rotary three-way valve further includes a code disk holder 19; the code disk holder 19 is connected to the drive shaft of the drive motor 22, and the code disk holder 19 is connected to the code disk component 18. The code disk holder 19 enables the connection between the code disk component 18 and the drive rod of the drive motor 22, ensuring synchronous rotation between the code disk component 18 and the drive motor 22.

[0070] The rotary three-way valve provided by this utility model has the following advantages:

[0071] 1. Due to the presence of the top coupling 15, the middle coupling 16, and the shaft end coupling 17, the drive motor 22 is not completely concentric with the upper part of the whole, which facilitates the separate maintenance, replacement and assembly; reduces positioning accuracy and machining level, and reduces machining costs;

[0072] 2. The set screw 14 holds the spring support 10 to adjust the pressure between the stator 4 and the rotor 5 to adapt to different pressure sources.

[0073] 3. Built-in pressure sensor 3 ensures there is no pressure difference between the whole and the atmosphere, ensuring the accuracy of pressure sensor 3. At the same time, it is connected to the overall environment to monitor the pressure inside the valve body and the pressure of the overall pipeline, avoiding dead volume liquid and reducing the occurrence of cross-contamination.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A rotary three-way valve, characterized by The rotary three-way valve comprises a stator (4), a rotor (5), a rotating shaft (12), an elastic assembly and a top rod assembly. The rotor (5) is arranged at the bottom of the stator (4) and is connected to the top of the rotating shaft (12), and the rotating shaft (12) is configured to rotate along the axis direction of itself. The elastic assembly is arranged in the rotating shaft (12), and the elastic force generated by the elastic assembly can act on the rotor (5) to press the rotor (5) against the stator (4). The top rod assembly is arranged in the rotating shaft (12) and is connected with the elastic assembly, and the top rod assembly is configured to move relative to the rotating shaft (12) to adjust the elastic force of the elastic assembly.

2. The rotary three-way valve according to claim 1, wherein the elastic assembly comprises an elastic piece (9) and a spring cover (8); the rotating shaft (12) is provided with a first accommodating groove, and the spring cover (8) is arranged in the first accommodating groove; one end of the elastic piece (9) is connected with the spring cover (8), and the other end of the elastic piece (9) is connected with the top rod assembly; and the elastic force generated by the elastic piece (9) is transmitted to the rotor (5) through the spring cover (8).

3. The rotary three-way valve according to claim 2, wherein the top rod assembly comprises a spring support (10) and a top screw (14); the rotating shaft (12) is provided with a second accommodating groove which is in communication with the first accommodating groove, one end of the spring support (10) extends into the first accommodating groove, and the other end of the spring support (10) extends into the second accommodating groove and is connected with the top screw (14) located in the second accommodating groove; the spring support (10) extends outward to form a connecting table, and one end of the elastic piece (9) away from the spring cover (8) is connected with the connecting table; and the top screw (14) is threadedly connected with the groove wall of the second accommodating groove.

4. The rotary three-way valve according to claim 2, further comprising a water platform (6).

5. The rotary three-way valve according to claim 1, further comprising a pressing plate (1) and a pressure sensor (3); the top of the stator (4) is recessed to form a sink, the pressure sensor (3) is arranged in the sink, and the pressing plate (1) is arranged on the stator (4) to limit the pressure sensor (3) in the sink.

6. The rotary three-way valve according to claim 1, further comprising a driving assembly and a shaft coupling assembly. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The driving rod of the driving assembly is connected with the shaft coupling assembly, the shaft coupling assembly is connected with the rotating shaft (12), and the driving force generated by the driving assembly is transmitted to the rotating shaft (12) through the shaft coupling assembly to drive the rotor (5) to rotate.

7. The rotary tee valve according to claim 6, wherein The shaft coupling assembly comprises a top end shaft coupling (15), a middle layer shaft coupling (16) and an axial end shaft coupling (17). The driving assembly comprises a driving motor (22), the driving shaft of the driving motor (22) is connected with the axial end shaft coupling (17), the top of the axial end shaft coupling (17) is connected with the middle layer shaft coupling (16), the top of the middle layer shaft coupling (16) is connected with the top end shaft coupling (15), and the top end shaft coupling (15) is connected with the bottom of the rotating shaft (12).

8. The rotary tee valve according to claim 7, wherein The driving assembly further comprises a motor mounting seat (21) and a guide sleeve (13). One end of the motor mounting seat (21) is connected with the driving motor (22), the other end of the motor mounting seat (21) is connected with the guide sleeve (13), and the guide sleeve (13) covers the rotating shaft (12). A bearing (11) is mounted on the motor mounting seat (21), and the bearing (11) is rotationally connected with the rotating shaft (12).

9. The rotary tee valve according to claim 8, wherein The rotary tee valve further comprises a code disc member (18) and a detection member (20). The code disc member (18) rotates synchronously with the driving motor (22), the detection member (20) is mounted on the motor mounting seat (21), and the detection member (20) is used for detecting the position of the code disc member (18).

10. The rotary tee valve according to claim 9, wherein The rotary tee valve further comprises a code disc fixing seat (19). The code disc fixing seat (19) is connected with the driving shaft of the driving motor (22), and the code disc fixing seat (19) is connected with the code disc member (18).

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