Three-way valve

Abstract

The utility model discloses a three-way valve, which belongs to the technical field of three-way valves and comprises a valve body, a driving device and a valve clack component. The driving device is connected to the outer side of the valve body; the valve clack assembly is located in the valve body. The valve body is provided with three interfaces; the driving device is connected with the valve clack assembly so as to drive the valve clack assembly to rotate in the valve body and close one connector, and the other two connectors can be communicated. A compensation device is arranged in the valve clack assembly so as to compensate the gap between the valve clack assembly and any connector. The three-way valve can effectively solve the problems that in the prior art, a valve clack is abraded after being used for a long time, so that the sealing performance is affected, cost is too high due to the fact that a magnetic coupling is adopted, the position of the valve clack cannot be visually judged, and the specific medium flow direction cannot be judged.

Description

Technical Field

[0001] The utility model belongs to the technical field of three-way valves, and specifically relates to a three-way valve. Background Art

[0002] A three-way valve is a valve device with three ports, one for inlet and two for outlet. There are many types of existing three-way valves, most of which have the following problems: different structural dimensions and large differences in interface forms; due to the long-term use of the three-way valve, the valve disc and the valve body are squeezed and contacted and move relative to each other, and the valve disc material is generally made of polytetrafluoroethylene, and the valve body is generally made of metal (304, 316L, cast steel, etc.). The polytetrafluoroethylene material is relatively soft, and the valve disc will inevitably be worn after long-term use, but the valve disc itself cannot automatically compensate, thereby affecting the sealing performance; usually, the existing three-way valve cannot directly judge the valve disc position from the appearance, so it is impossible to determine the specific medium flow direction, which is extremely inconvenient in actual use; in order to prevent the three-way valve from leaking, the conventional use of magnetic coupling can achieve complete leakage-free, but the price is too high, and it is necessary to optimize the sealing structure and cancel the magnetic coupling.

[0003] For example, the Chinese invention patent electric ball valve with scraper, document number CN115654166A, discloses a valve body, a valve core is arranged in the valve body, the valve core includes a valve disc and an upper mounting part and a lower mounting part, a valve seat is arranged in the medium inlet, an external scraper is arranged on the valve seat, a connecting shaft is fixedly installed at the bottom of the upper mounting part, a mounting seat is rotatably installed on the connecting shaft, a horizontal shaft is rotatably installed on the mounting seat, and an internal scraper is fixedly installed at one end of the horizontal shaft. In the technical solution disclosed in the above document, the valve disc will contact and rub with the valve body during long-term use, and the valve disc will be worn over time, thereby affecting the sealing performance. Utility Model Content

[0004] The purpose of the utility model is to provide a three-way valve to solve the above shortcomings, so as to solve the problems of the valve flap of the prior art being worn out after long-term use and affecting the sealing performance, the high cost caused by the use of magnetic couplings, and the inability to intuitively determine the position of the valve flap and the specific flow direction of the medium. To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A three-way valve comprises a valve body, a drive device and a valve flap assembly; the drive device is connected to the outside of the valve body; the valve flap assembly is located inside the valve body; the valve body is provided with three interfaces; the drive device is connected to the valve flap assembly to drive the valve flap assembly to rotate in the valve body and close one of the interfaces, so that the other two interfaces are connected; a compensation device is provided in the valve flap assembly to compensate for the gap between the valve flap assembly and any interface.

[0006] Furthermore, an upper cover plate and a lower cover plate are respectively provided at the upper end and the lower end of the valve body; the lower cover plate is connected to the valve body via a blind hole structure.

[0007] Furthermore, the valve flap assembly includes a rotating shaft, a valve flap rod and a valve flap; the upper and lower ends of the rotating shaft can be rotatably connected to the center of the upper cover plate and the lower cover plate respectively; one end of the valve flap rod is fixed to the side wall of the rotating shaft, and the other end is fixedly connected to the valve flap; the rotating shaft can drive the valve flap to rotate to any of the three interfaces of the valve body.

[0008] Furthermore, the compensation device is a spring; one end of the spring is fixedly connected to the rotating shaft, and the other end of the spring is fixedly connected to the valve flap rod.

[0009] Furthermore, a pressure relief hole is provided on the rotating shaft at a position corresponding to the spring.

[0010] Furthermore, the driving device is a driving motor; a connecting bracket is provided on the upper side of the upper cover plate; the driving motor is fixedly connected to the upper cover plate through the connecting bracket; a coupling is provided on the output end of the driving motor; the upper end of the rotating shaft passes through the upper cover plate and is connected to the coupling.

[0011] Furthermore, a sealing ring is provided at the connection between the rotating shaft and the upper cover plate; the sealing ring is double-layered.

[0012] Furthermore, the coupling is provided with a mark, and the mark corresponds to the position of the valve disc.

[0013] Furthermore, the three interfaces extend outwards respectively to form welding interfaces of different sizes.

[0014] Furthermore, it also includes a controller; the controller is electrically connected to the drive motor.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model provides a three-way valve. By setting a compensation device, when the valve disc is worn, the force of the spring can compensate for the wear of the valve disc, thereby ensuring that the valve disc can continue to seal its corresponding interface and change the flow direction of the medium;

[0017] 2. The utility model provides a three-way valve, which reserves three interfaces as welding interfaces of different sizes.

[0018] Realize flexible matching of interfaces;

[0019] The utility model provides a three-way valve. By setting a mark corresponding to the position of the valve disc on the coupling, the position of the valve disc and the flow direction of the medium in the valve body can be intuitively determined by the mark without completely disassembling the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the structure of the utility model;

[0021] Figure 2 It is a top view of the structure of the utility model;

[0022] In the accompanying drawings: 1-connecting bracket, 2-coupling, 3-upper cover plate, 4-sealing ring, 5-valve disc, 6-valve disc rod, 7-spring, 8-lower cover plate, 9-rotating shaft, 10-fastener, 12-spare plug, 13-valve body, 14-driving motor. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods, but the present invention is not limited to the following embodiments.

[0024] Embodiment 1:

[0025] See attached Figures 1-2. A three-way valve comprises a valve body 13, a driving device and a valve flap assembly; the driving device is connected to the outside of the valve body 13; the valve flap assembly is located inside the valve body 13; three interfaces are arranged on the valve body 13; the driving device is connected to the valve flap assembly to drive the valve flap assembly to rotate in the valve body 13 and close one of the interfaces, so that the other two interfaces are connected; a compensation device is arranged in the valve flap assembly to compensate for the gap between the valve flap assembly and any interface. As can be seen from the above structure, a three-way valve of the utility model comprises a valve body 13, the upper and lower ends of the valve body 13 are closed by an upper cover plate 3 and a lower cover plate 8, and the valve body 13 is provided with three interfaces in the horizontal direction, and the three interfaces are used to reserve welding interfaces of different specifications, which can be flexibly welded and combined into different forms to adapt to the connection of different medium pipelines. Another interface is also arranged on the valve body 13, which is sealed by a baffle, and a spare plug 12 is arranged on the baffle. When the interface is required to perform sampling detection or pressure detection of the medium, the spare plug 12 can be removed to perform the corresponding operation. The upper end of the valve body 13 is provided with a driving device, preferably a driving motor 14. The output end of the driving motor 14 can realize rotational output, which is connected to the valve flap assembly inside the valve body 13 through the coupling 2, driving the valve flap assembly to rotate in the valve body 13. The valve flap assembly includes a rotating shaft 9, a valve flap rod 6 and a valve flap 5. The upper end of the rotating shaft 9 passes through the upper cover plate 3 at the upper end of the valve body 13, and is connected to the output end of the driving motor 14 through the coupling 2. One end of the valve flap rod 6 is fixedly connected to the rotating shaft 9, and the other end is connected to the valve flap 5. The rotating shaft 9 is driven to rotate by the driving motor 14, thereby driving the valve flap 5 in the valve body. 13 rotates, and preferably the four interfaces in the valve body 13 are all located on the plane formed by the rotation of the valve disc 5, ensuring that the valve disc 5 can complete the interception by rotating to any interface, and the drive motor 14 can be connected through the controller, and the setting program controls the drive motor 14 to rotate, so as to accurately control the valve disc 5 to rotate to the corresponding interface, one of the interfaces is cut off by the valve disc 5, that is, except for the interface with the spare plug 12, the medium pipelines connected to the other two interfaces form circulation, and the drive motor 14 can be controlled to rotate the valve disc 5 to the specified interface as needed, so as to realize different flow directions of the medium. In order to prevent the valve flap 5 from rubbing against the valve body 13 and wearing during long-term operation, thereby affecting the sealing of the valve flap 5 and the interface, a compensation device is provided to automatically compensate for the gap between the valve flap 5 and the interface. The preferred compensation device is a spring 7, one end of which is fixed to the rotating shaft 9, and the other end is fixedly connected to the valve flap rod 6. The specific spring 7 is arranged inside the valve flap rod 6, and one end of the spring 7 is embedded in the valve flap rod 6. The spring 7 is set in a compressed state to always provide a force to make the valve flap 5 abut against the interface. As the valve flap 5 wears, the spring 7 gradually begins to restore its initial state, and always ensures that the valve flap 5 abuts against any interface to ensure the interception effect. The specific compression stroke of the spring 7 is set accordingly according to the size of the respective valve body 13. The setting of the compensation device can effectively extend the service life of the three-way valve.The three-way valve of the utility model can avoid the valve flap 5 from being worn and affecting the sealing performance of the interface by arranging a compensation device, automatically compensate the gap between the valve flap 5 and the interface, and prolong the service life.

[0026] Embodiment 2:

[0027] See attached Figures 1-2 . On the basis of the first embodiment, the upper and lower ends of the valve body 13 are respectively provided with an upper cover plate 3 and a lower cover plate 8; the lower cover plate 8 is connected to the valve body 13 through a blind hole structure. As can be seen from the above structure, the upper and lower ends of the valve body 13 are respectively closed by the upper cover plate 3 and the lower cover plate 8, and four cross-shaped interfaces are opened around the valve body 13. The valve body 13 is used for the circulation of the medium. To ensure the sealing, the upper cover plate 3 is fixedly connected to the valve body 13 through the fastener 10, and the lower cover plate 8 is connected to the valve body 13 through the matching structure of the blind hole and the bolt.

[0028] The valve flap assembly includes a rotating shaft 9, a valve flap rod 6 and a valve flap 5; the upper and lower ends of the rotating shaft 9 are rotatably connected to the center of the upper cover plate 3 and the lower cover plate 8 respectively; one end of the valve flap rod 6 is fixed to the side wall of the rotating shaft 9, and the other end is fixedly connected to the valve flap 5; the rotating shaft 9 can drive the valve flap 5 to rotate to any one of the three interfaces of the valve body 13. It can be seen from the above structure that the two ends of the rotating shaft 9 are respectively arranged at the center of the upper cover plate 3 and the lower cover plate 8, and the upper end of the rotating shaft 9 passes through the upper cover plate 3 and is connected to the output end of the driving motor 14 through the coupling 2, and rotates with the rotation of the output end of the driving motor 14, and the valve flap 5 is fixedly connected to the rotating shaft 9 through the valve flap rod 6. The rotation of the rotating shaft 9 drives the valve flap 5 to move to any one of the four interfaces on the valve body 13 to achieve flow interception.

[0029] Embodiment three:

[0030] See attached Figures 1-2 . On the basis of the second embodiment, the compensation device is a spring 7; one end of the spring 7 is fixedly connected to the rotating shaft 9, and the other end is fixedly connected to the valve flap rod 6. It can be seen from the above structure that a compensation device is provided to automatically compensate for the gap between the valve flap 5 and the interface. The preferred compensation device is a spring 7, one end of which is fixed on the rotating shaft 9, and the other end is fixedly connected to the valve flap rod 6. Specifically, one end of the spring 7 is embedded in the valve flap rod 6, and the spring 7 is set in a compressed state to always provide a force to make the valve flap 5 abut against the interface. As the valve flap 5 wears, the spring 7 gradually begins to restore the initial state, and always ensures that the valve flap 5 abuts against any interface to ensure the interception effect. The specific compression stroke of the spring 7 is set accordingly according to the size of the respective valve body 13. The setting of the spring 7 can effectively extend the service life of the three-way valve.

[0031] The rotating shaft 9 is provided with a pressure relief hole at a position corresponding to the spring 7. As can be seen from the above structure, adding a pressure relief hole at a position corresponding to the rotating shaft 9 allows the spring 7 to work smoothly, thereby automatically compensating for the wear of the valve flap 5 and increasing the service life.

[0032] The driving device is a driving motor 14; a connecting bracket 1 is provided on the upper side of the upper cover plate 3; the driving motor 14 is fixedly connected to the upper cover plate 3 through the connecting bracket 1; a coupling 2 is provided on the output end of the driving motor 14; the upper end of the rotating shaft 9 penetrates the upper cover plate 3 and is connected to the coupling 2. As can be seen from the above structure, the preferred driving device is the driving motor 14, the driving motor 14 is fixedly connected to the upper cover plate 3 through the connecting bracket 1, and the connecting bracket 1 is respectively fixed to the driving motor 14 and the upper cover plate 3 by fasteners 10, and the preferred fasteners 10 are structures such as bolts, and the connecting bracket 1 can effectively support the driving motor 14, and the output end of the driving motor 14 is connected to the rotating shaft 9 through the coupling 2, which is used to drive the rotation of the rotating shaft 9.

[0033] A sealing ring 4 is provided at the connection between the rotating shaft 9 and the upper cover plate 3; the sealing ring 4 is provided with double layers. As can be seen from the above structure, the rotating shaft 9 passes through the upper cover plate 3, and two layers of sealing rings 4 are provided at the contact position between the rotating shaft 9 and the upper cover plate 3. The sealing ring 4 further ensures the sealing performance inside the valve body 13, and ensures that the sealing performance is also good under the premise that the rotating shaft 9 can rotate.

[0034] Embodiment 4:

[0035] See attached Figures 1-2 . On the basis of the third embodiment, the coupling 2 is provided with a mark; the mark corresponds to the position of the valve flap 5. As can be seen from the above structure, part of the mechanism of the coupling 2 is outside the valve body 13. By setting a mark on this part, it is always corresponding to the position of the valve flap 5. The position of the valve flap 5 can be determined by the mark on the coupling 2, that is, except for the interface at the spare plug 12, the pipelines connected to the remaining two interfaces are the flow direction of the medium.

[0036] The three interfaces extend outwards respectively to form welding interfaces of different sizes. As can be seen from the above structure, except for the interface with the spare plug 12, the remaining three interfaces are used to connect the pipeline. The three interfaces extend outwards in their respective directions, and the final opening sizes are different. They are designed according to the sizes of existing commonly used pipelines to adapt to different pipelines, and have stronger adaptability. The interface position can also be extended by welding small straight sections of pipelines, and small straight sections of pipelines of different sizes can be selected to adapt to the connection of more pipelines of different sizes.

[0037] The valve body 10 also includes a controller which is electrically connected to the drive motor 14. As can be seen from the above structure, the drive motor 14 is electrically connected to the controller, which can realize automatic control of the position of the valve flap 5, and the rotation angle of the valve flap 5 driven by the drive motor 14 is set by a program so that it can accurately abut against any interface to achieve flow interception.

[0038] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A three-way valve, characterized in that: The invention comprises a valve body (13), a driving device and a valve flap assembly; the driving device is connected to the outside of the valve body (13); the valve flap assembly is located inside the valve body (13); the valve body (13) is provided with three interfaces; the driving device is connected to the valve flap assembly to drive the valve flap assembly to rotate inside the valve body (13) and close one of the interfaces, so that the other two interfaces are connected; a compensation device is provided inside the valve flap assembly to compensate for the gap between the valve flap assembly and any interface.

2. A three-way valve according to claim 1, characterized in that: An upper cover plate (3) and a lower cover plate (8) are respectively provided at the upper end and the lower end of the valve body (13); the lower cover plate (8) is connected to the valve body (13) via a blind hole structure.

3. A three-way valve according to claim 2, characterized in that: The valve flap assembly comprises a rotating shaft (9), a valve flap rod (6) and a valve flap (5); the upper and lower ends of the rotating shaft (9) are rotatably connected to the center of the upper cover plate (3) and the lower cover plate (8) respectively; one end of the valve flap rod (6) is fixed to the side wall of the rotating shaft (9), and the other end is fixedly connected to the valve flap (5); the rotating shaft (9) can drive the valve flap (5) to rotate to any one of the three interfaces of the valve body (13).

4. A three-way valve according to claim 3, characterized in that: The compensation device is a spring (7); one end of the spring (7) is fixedly connected to the rotating shaft (9), and the other end is fixedly connected to the valve flap rod (6).

5. A three-way valve according to claim 4, characterized in that: A pressure relief hole is provided on the rotating shaft (9) at a position corresponding to the spring (7).

6. A three-way valve according to claim 3, characterized in that: The driving device is a driving motor (14); a connecting bracket (1) is provided on the upper side of the upper cover plate (3); the driving motor (14) is fixedly connected to the upper cover plate (3) via the connecting bracket (1); a coupling (2) is provided on the output end of the driving motor (14); the upper end of the rotating shaft (9) passes through the upper cover plate (3) and is connected to the coupling (2).

7. A three-way valve according to claim 3, characterized in that: A sealing ring (4) is provided at the connection between the rotating shaft (9) and the upper cover plate (3); the sealing ring (4) is provided with a double layer.

8. A three-way valve according to claim 6, characterized in that: The coupling (2) is provided with a mark, and the mark corresponds to the position of the valve flap (5).

9. A three-way valve according to claim 1, characterized in that: The three interfaces extend outwards respectively to form welding interfaces of different sizes.

10. A three-way valve according to claim 6, characterized in that: It also includes a controller; the controller is electrically connected to the drive motor (14).

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