Three-way reversing valve

Abstract

This utility model belongs to the field of flow guiding devices and discloses a three-way reversing valve, including a valve body, a valve core, and a driving component. The valve body internally has a first feed channel, a second feed channel, a discharge channel, and a valve chamber. The valve chamber wall has a first feed port, a second feed port, and a discharge port. The first feed port communicates with the first feed channel, the second feed port communicates with the second feed channel, and the discharge port communicates with the discharge channel. The valve core is rotatably mounted on the valve body and includes a sealing part that slides against the valve chamber wall to selectively block either the first or second feed port. The first and second feed ports are spaced apart along the sliding direction of the sealing part, and the width of the gap between them matches the width of the sealing part, ensuring the continuity of the fluid path during reversal. The driving component is driven by the valve core and controls its rotational movement.

Description

Technical Field

[0001] This utility model belongs to the field of directional valve technology, and more specifically, relates to a three-way directional valve. Background Technology

[0002] Three-way valves are used to switch the flow direction or merge and split fluid media. Existing three-way valves generally suffer from poor hydrodynamic performance during operational transitions. When the valve core is in the middle of its switching stroke, the cross-sectional area of ​​the flow channel is significantly reduced due to structural design limitations, creating a throttling effect. This not only leads to a sudden increase in local flow velocity but also causes drastic fluctuations in system pressure, severely affecting the stability of flow control in the process flow. More significantly, some three-way valve structures with valve cores or rotating valve plates exhibit a critical state where both main channels are simultaneously blocked by the valve body during the transition phase of the switching action, causing a momentary interruption of fluid delivery. This flow interruption phenomenon can lead to a chain reaction of problems such as reactant ratio imbalances and temperature runaway in precision chemical reactions or continuous production scenarios, and may even threaten the safe operation of equipment. Utility Model Content

[0003] The purpose of this application is to provide a three-way directional valve to solve the technical problem of unstable flow rate or pressure in the prior art during the switching process of the three-way directional valve.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] A three-way directional valve is provided, comprising:

[0006] The valve body has a first feed channel, a second feed channel, a discharge channel, and a valve cavity. The valve cavity has a first feed port, a second feed port, and a discharge port on its cavity wall. The first feed port is connected to the first feed channel, the second feed port is connected to the second feed channel, and the discharge port is connected to the discharge channel.

[0007] A valve core is rotatably connected to the valve body. The valve core includes a sealing portion, which is slidably connected to the cavity wall of the valve chamber. The sealing portion is used to block the first feed port or the second feed port. The first feed port and the second feed port are spaced apart along the sliding direction of the sealing portion. The width of the gap between the first feed port and the second feed port is equal to the width of the sealing portion.

[0008] A driving component, which is driven to connect with the valve core, is used to drive the valve core to rotate on the valve body.

[0009] As a further improvement to the above technical solution:

[0010] Optionally, the valve core includes a rotating shaft and a connecting rod. The rotating shaft is driven to the driving component, the connecting rod is axially perpendicular to the rotating shaft, and the sealing part is installed at one end of the connecting rod.

[0011] Optionally, the valve core further includes a support portion, which is mounted on the other end of the connecting rod portion and abuts against the cavity wall of the valve chamber.

[0012] Optionally, the three-way directional valve includes a bearing and a bearing housing, the bearing housing being mounted on the valve body and located at one end of the valve core, the inner ring of the bearing being connected to the rotating shaft, and the outer ring of the bearing being connected to the bearing housing.

[0013] Optionally, the bearing housing includes a bearing mounting groove arranged axially and at least two seal mounting grooves, and a discharge hole penetrating the bearing housing is provided between the two seal mounting grooves.

[0014] Optionally, the three-way directional valve further includes an inner sleeve, which is installed on the cavity wall of the valve chamber and sleeved on the outside of the valve core, and the sealing part is slidably connected to the inner sleeve.

[0015] Optionally, the first feed channel and the second feed channel are arranged at an angle, and the angle is equal to the rotation angle of the valve core.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] The three-way directional valve provided in this application includes a valve body, a valve core, and a drive component. The valve body internally comprises a first feed channel, a second feed channel, a discharge channel, and a valve chamber. The valve chamber wall has a first feed port, a second feed port, and a discharge port. The first feed port communicates with the first feed channel, the second feed port communicates with the second feed channel, and the discharge port communicates with the discharge channel. The valve core is rotatably mounted on the valve body and includes a sealing part that slides against the valve chamber wall to selectively block either the first or second feed port. The first and second feed ports are spaced apart along the sliding direction of the sealing part, and the width of the gap between them matches the width of the sealing part, ensuring the continuity of the fluid path during directional switching. The drive component is driven by the valve core and controls its rotational movement.

[0018] During the reversing operation, the drive unit rotates the valve core, switching the sealing part from blocking the first inlet to blocking the second inlet. In this process, the sealing part first fully opens the first inlet, then gradually blocks the second inlet, ensuring that fluid can always enter the valve chamber through at least one inlet during the reversing transition. This avoids pressure fluctuations or flow interruptions caused by sudden reduction or complete closure of the flow path. Similarly, when the sealing part switches from blocking the second inlet to blocking the first inlet, it first fully opens the second inlet, then gradually blocks the first inlet, ensuring a smooth transition during the reversing process. This effectively solves the problem of unstable flow caused by changes in the fluid flow path during the reversing process in traditional three-way directional valves. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the 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 based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the three-way directional valve of this application;

[0021] Figure 2 This is an exploded structural diagram of the three-way directional valve of this application;

[0022] Figure 3 This is a three-dimensional structural diagram of the valve core of the three-way directional valve of this application;

[0023] Figure 4 This is a cross-sectional view of the three-way directional valve of this application in its first working state.

[0024] Figure 5 This is a cross-sectional structural schematic diagram of the second working state of the three-way directional valve of this application;

[0025] Figure 6 This is a cross-sectional structural schematic diagram of the three-way directional valve of this application in its third working state;

[0026] Figure 7 This is a partial cross-sectional view of the bearing housing of the three-way directional valve of this application.

[0027] The following are the labeling elements in the figure:

[0028] 1. Valve body; 11. First feed channel; 12. Second feed channel; 13. Discharge channel; 14. Valve cavity; 2. Valve core; 21. Sealing part; 22. Rotating shaft part; 23. Connecting rod part; 24. Support part; 3. Drive component; 4. Bearing; 5. Bearing seat; 51. Bearing mounting groove; 52. Sealing part mounting groove; 53. Discharge hole; 6. Inner sleeve. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0033] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those skilled in the art. The technical terms used herein are for the purpose of describing particular embodiments only and are not intended to limit the scope of protection of this invention.

[0034] To address the technical problems of flow fluctuations or pressure instability caused by changes in fluid diameter during the switching process of a three-way directional valve, such as... Figures 1 to 3As shown, this application provides a three-way directional valve, including a valve body 1, a valve core 2, and a drive component 3. The valve body 1 internally has a first feed channel 11, a second feed channel 12, a discharge channel 13, and a valve chamber 14. The valve chamber 14 has a first feed port, a second feed port, and a discharge port respectively opened on its wall. The first feed port communicates with the first feed channel 11, the second feed port communicates with the second feed channel 12, and the discharge port communicates with the discharge channel 13. The valve core 2 is rotatably mounted on the valve body 1 and includes a sealing part 21. The sealing part 21 slides against the wall of the valve chamber 14 to selectively block either the first or second feed port. The first and second feed ports are spaced apart along the sliding direction of the sealing part 21, and the width of the gap between them matches the width of the sealing part 21, ensuring the continuity of the fluid passage during the directional switching process. The drive component 3 is driven by the valve core 2 and is used to control the rotational movement of the valve core 2.

[0035] like Figures 4 to 6 As shown, during the reversing operation, the drive unit 3 drives the valve core 2 to rotate, causing the sealing part 21 to switch from blocking the first inlet to blocking the second inlet. In this process, the sealing part 21 first fully opens the first inlet, and then gradually blocks the second inlet, ensuring that fluid can always enter the valve chamber 14 through at least one inlet during the reversing transition, avoiding pressure fluctuations or flow interruptions caused by sudden reduction or complete closure of the flow path. Similarly, when the sealing part 21 switches from blocking the second inlet to blocking the first inlet, it first fully opens the second inlet, and then gradually blocks the first inlet to ensure a smooth transition during the reversing process, effectively solving the problem of unstable flow caused by changes in the fluid flow path during the reversing process in traditional three-way reversing valves.

[0036] like Figure 3 As shown, in one specific embodiment of this application, the valve core 2 includes a rotating shaft portion 22 and a connecting rod portion 23. The rotating shaft portion 22 extends axially and is directly connected to the driving member 3, for receiving the rotational power provided by the driving member 3. The connecting rod portion 23 is fixedly arranged in a direction perpendicular to the axial direction of the rotating shaft portion 22. The sealing portion 21 is fixedly installed at one end of the connecting rod portion 23. The rotational movement of the rotating shaft portion 22 drives the connecting rod portion 23 to rotate axially, thereby causing the sealing portion 21 to switch between the first feed port and the second feed port.

[0037] like Figure 3As shown, in one specific embodiment of this application, the valve core 2 further includes a support portion 24. The support portion 24 is fixedly mounted on the connecting rod portion 23, and its outer edge, opposite to the sealing portion 21, maintains contact with the cavity wall of the valve cavity 14. During the movement of the valve core 2, the support portion 24 always forms a sliding support with the inner wall of the valve cavity 14, effectively balancing the radial force on the sealing portion 21 during operation and preventing the valve core 2 from becoming skewed or stuck due to unilateral force. In particular, while providing support, the support portion 24 completely avoids the flow area of ​​the discharge port, ensuring that the discharge channel 13 remains unobstructed under any operating condition.

[0038] like Figure 2 As shown in a specific embodiment of this application, the three-way directional valve includes a bearing 4 and a bearing housing 5. The bearing housing 5 is fixedly mounted on the valve body 1 and located at the end of the rotating shaft of the valve core 2. The inner ring of the bearing 4 forms an interference fit with the rotating shaft portion 22 of the valve core 2, while the outer ring is tightly fitted to the inner hole of the bearing housing 5. This bearing support structure effectively reduces the frictional resistance when the valve core 2 rotates, while ensuring that the rotating shaft portion 22 maintains stable coaxiality under high-speed operation or frequent directional switching conditions.

[0039] like Figure 7 As shown, in a specific embodiment of this application, the bearing housing 5 adopts a multi-stage sealing protection structure, with a bearing mounting groove 51 and two seal mounting grooves 52 arranged sequentially along the axial direction in its main body. The bearing 4 is assembled in the bearing mounting groove 51, and the two seal mounting grooves 52 are used to install seals to form a double sealing protection. In particular, a through discharge hole 53 is provided on the wall of the bearing housing 5 between the two seal mounting grooves 52, which communicates with the external environment. When the fluid inside the valve body 1 leaks, the leaking medium is first blocked by the first seal. If it continues to permeate, it can be directly discharged to the outside through the discharge hole 53, effectively preventing the leaking fluid from contacting the bearing 4 and causing lubrication failure or corrosion damage. To further enhance the support stability, the above-mentioned bearing housing 5 structure is arranged at both ends of the shaft portion 22 along the axial direction, forming a symmetrical support layout.

[0040] like Figure 2 As shown, in one specific embodiment of this application, the three-way directional valve further includes an inner sleeve 6. The inner sleeve 6 is detachably fixed to the inner wall of the valve cavity 14, and its inner bore matches the outer contour of the valve core 2 to form a sliding guide structure. The sealing part 21 maintains sliding contact with the inner surface of the inner sleeve 6, and the guiding effect of the inner sleeve 6 ensures that the movement trajectory of the sealing part 21 is precisely controllable. The inner sleeve 6 is made of a wear-resistant material with a low coefficient of friction, effectively reducing the frictional resistance during the sliding process of the sealing part 21, while also reducing wear on the inner wall of the valve cavity 14. The detachable design of the inner sleeve 6 facilitates maintenance and replacement. When the inner sleeve 6 wears down due to long-term use, it can be replaced separately without replacing the entire valve body 1, reducing maintenance costs.

[0041] like Figures 4 to 6 As shown, in one specific embodiment of this application, the first feed channel 11 and the second feed channel 12 are arranged at a specific angle. The degree of this angle is set to match the rotation stroke of the valve core 2, so that after the valve core 2 completes a predetermined angle of rotation, the sealing part 21 can accurately complete the switching action from one feed port to another. Preferably, the angle between the first feed channel 11 and the second feed channel 12 is set to 90 degrees. This angle configuration corresponds to the standard rotation angle of the valve core 2, ensuring that the sealing part 21 can achieve complete switching between the first feed port and the second feed port within a 90-degree rotation range.

[0042] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A three-way reversing valve characterized by comprising: include: The valve body (1) has a first feed channel (11), a second feed channel (12), a discharge channel (13) and a valve cavity (14). The valve cavity (14) has a first feed port, a second feed port and a discharge port on its cavity wall. The first feed port is connected to the first feed channel (11), the second feed port is connected to the second feed channel (12), and the discharge port is connected to the discharge channel (13). A valve core (2) is rotatably connected to the valve body (1). The valve core (2) includes a sealing part (21). The sealing part (21) is slidably connected to the cavity wall of the valve chamber (14). The sealing part (21) is used to block the first feed port or the second feed port. The first feed port and the second feed port are spaced apart along the sliding direction of the sealing part (21). The width of the gap between the first feed port and the second feed port is equal to the width of the sealing part (21). The driving component (3) is driven to connect with the valve core (2) and is used to drive the valve core (2) to rotate on the valve body (1).

2. The three-way selector valve according to claim 1, wherein The valve core (2) includes a rotating shaft (22) and a connecting rod (23). The rotating shaft (22) is driven to connect with the driving member (3). The connecting rod (23) is arranged perpendicular to the axis of the rotating shaft (22). The sealing part (21) is installed at one end of the connecting rod (23).

3. The three-way diverter valve of claim 2, wherein The valve core (2) also includes a support (24), which is installed at the other end of the connecting rod (23) and abuts against the cavity wall of the valve cavity (14).

4. The three-way selector valve according to claim 2, wherein Includes a bearing (4) and a bearing housing (5), the bearing housing (5) is mounted on the valve body (1) and located at one end of the valve core (2), the inner ring of the bearing (4) is connected to the rotating shaft (22), and the outer ring of the bearing (4) is connected to the bearing housing (5).

5. The three-way selector valve according to claim 4, wherein The bearing housing (5) includes a bearing mounting groove (51) arranged along the axial direction and at least two seal mounting grooves (52), and a discharge hole (53) penetrating the bearing housing (5) is also provided between the two seal mounting grooves (52).

6. The three-way selector valve according to any one of claims 1 to 5, characterized in that It also includes an inner sleeve (6), which is installed on the cavity wall of the valve cavity (14) and sleeved on the outside of the valve core (2). The sealing part (21) is slidably connected to the inner sleeve (6).

7. The three-way selector valve according to any one of claims 1 to 5, characterized in that The first feed channel (11) and the second feed channel (12) are arranged at an angle, and the angle is equal to the rotation angle of the valve core (2).

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