Dual-channel valve device

Abstract

The dual-channel valve device comprises a valve body, valve elements and a driving assembly, the valve body is provided with two valve channels, and the valve elements comprise the first valve element and the second valve element. The driving assembly drives the first valve element and the second valve element to move through the transmission assembly. The transmission assembly comprises a driving part, a first driven part and a second driven part, and the driving part drives the first valve element to move through the first driven part and drives the second valve element to move through the second driven part. When the driving part moves in the first direction, the first valve element is driven to open the corresponding valve channel, and the second valve element keeps closing the corresponding valve channel. On the contrary, when the driving part moves in the second direction, the second valve element is driven to open the corresponding valve channel, and the first valve element keeps closing the corresponding valve channel. Independent opening and closing control of the two valve channels of the double-channel valve device is achieved through the single driving assembly, and the structure is simple and reliable.

Description

Technical Field

[0001] This application relates to the field of valve technology for controlling fluid flow, and in particular to a two-channel valve device. Background Technology

[0002] With increasingly stringent emission requirements and higher demands for reduced fuel consumption, exhaust gas recirculation (EGR) technology is being increasingly applied to power systems. In the engine exhaust gas recirculation (EGR) system, the EGR valve is the core component controlling exhaust gas flow and pressure.

[0003] To better achieve the function of exhaust gas recirculation, reduce emissions, or reduce fuel and gas consumption, the EGR system needs to simultaneously take into account the independent control of the low-pressure EGR channel and the high-pressure EGR channel, so as to achieve precise adjustment of exhaust gas recirculation.

[0004] Currently, some existing technologies employ two EGR systems—one high-pressure and one low-pressure—to meet the application needs of various working conditions. However, the two EGR systems present challenges in terms of installation space and are relatively expensive.

[0005] Therefore, it is necessary to propose a new technical solution to overcome the shortcomings of existing technologies. Utility Model Content

[0006] Based on this, this application provides a dual-channel valve device that achieves independent opening and closing control of the low-pressure channel and the high-pressure channel through a single drive component. While simplifying the structure and reducing costs, it significantly improves the accuracy of channel switching and sealing reliability, thereby meeting the refined control requirements of exhaust gas recirculation under all engine operating conditions.

[0007] Therefore, this application adopts the following technical solution: a dual-channel valve device, including a valve body, a valve core disposed in the valve body cavity, and a drive assembly for driving the valve core to move. The valve body has at least two valve channels, and the valve core includes a first valve core and a second valve core that control the opening and closing of the two valve channels. The dual-channel valve device further includes a transmission assembly, and the drive assembly drives the first valve core and the second valve core to move through the transmission assembly. The transmission assembly includes an active part connected to the drive assembly, a first driven part linked to the first valve core, and a second driven part linked to the second valve core. The active part drives the first valve core to move through the first driven part, and the drive assembly drives the first valve core to move through the second driven part. The second driven part drives the second valve core to move. During the process of the driving assembly driving the active part to move, the active part can be coupled to the first valve core in a first direction through the first driven part and decoupled from the second valve core through the second driven part, so that when the active part moves along the first direction, the first valve core is driven while the second valve core remains stationary. The active part can also be coupled to the second valve core in a second direction opposite to the first direction through the second driven part and decoupled from the first valve core through the first driven part, so that when the active part moves along the second direction, the second valve core is driven while the first valve core remains stationary.

[0008] In some embodiments, the driving part includes a driving gear, the first driven part includes a first driven gear, the second driven part includes a second driven gear, and the driving gear meshes with the first driven gear and the second driven gear simultaneously to drive the first driven gear and the second driven gear to rotate synchronously.

[0009] In some embodiments, the first driven part further includes a first linkage member fixedly connected to the rotation shaft of the first valve core. The first linkage member includes a first stop block, and the first driven gear has a first push block that cooperates with the first stop block. When the first driven gear moves in the first direction, it pushes against the first push block, and when the first driven gear moves in the second direction, it disengages from the first push block; and / or,

[0010] The second driven part further includes a second linkage member fixedly connected to the rotation shaft of the second valve core. The second linkage member includes a second stop block. The second driven gear has a second push block that cooperates with the second stop block. When the second driven gear moves along the second direction, it pushes against the second push block. When the second driven gear moves along the first direction, it disengages from the second push block.

[0011] In some embodiments, the valve body is provided with a first limiting block that abuts against the first linkage member to limit the maximum rotation angle of the first linkage member; and / or, the valve body is provided with a second limiting block that abuts against the second linkage member to limit the maximum rotation angle of the second linkage member.

[0012] In some embodiments, a first elastic element is installed in the valve body, one end of the first elastic element being connected to the valve body and the other end being connected to the first linkage element, so as to provide an elastic force for the first valve core to reset to the initial state when the first linkage element rotates away from the initial state; and / or, a second elastic element is installed in the valve body, one end of the second elastic element being connected to the valve body and the other end being connected to the second linkage element, so as to provide an elastic force for the second valve core to reset to the initial state when the second linkage element rotates away from the initial state.

[0013] In some embodiments, the first elastic element and the second elastic element are helical torsion springs.

[0014] In some embodiments, there are two first pushing blocks, protruding towards each other from the inner ring of the first driven gear; and there are two first stopping blocks, protruding away from each other from the middle of the first linkage member. The two first pushing blocks and the two first stopping blocks are arranged alternately, and one side of each first pushing block abuts against one side of a first stopping block; and / or,

[0015] There are two second push blocks, which protrude from the inner ring of the second driven gear and face each other. There are two second stop blocks, which protrude from the middle of the second linkage member and face each other. The two second push blocks and the two second stop blocks are arranged alternately, and one side of each second push block is attached to one side of a second stop block.

[0016] In some embodiments, the driving part includes a driving gear, the first driven part includes a first driven gear, and the second driven part includes a second driven gear; wherein the driving gear has a sector-shaped tooth segment, which engages with one of the first driven gear and the second driven gear and disengages from the other, and / or the first driven gear and the second driven gear have sector-shaped tooth segments, and the driving gear engages with one of the first driven gear and the second driven gear and disengages from the other.

[0017] In some embodiments, the valve body includes a valve seat and a valve cover fixed to the valve seat, wherein a drive chamber is provided on the side of the valve cover away from the valve seat, and the drive assembly is disposed in the drive chamber.

[0018] In some embodiments, the transmission assembly is disposed in a transmission chamber between the valve cover and the valve seat.

[0019] In some embodiments, the dual-channel valve device is an EGR valve, wherein one of the two valve channels is a high-pressure gas channel and the other is a low-pressure gas channel.

[0020] The dual-channel valve device provided in this application has a drive assembly that drives a first valve core and a second valve core to move via a transmission assembly. The transmission assembly includes an active part connected to the drive assembly, a first driven part linked to the first valve core, and a second driven part linked to the second valve core. The active part drives the first valve core to move via the first driven part and drives the second valve core to move via the second driven part. The first and second valve cores are asynchronously linked. When both the first and second valve cores are in the initial state of closing the valve channel, the active part is coupled to the first valve core in a first direction via the first driven part, and... The second driven part is decoupled from the second valve core, so that when the driving part moves along the first direction, the first valve core is driven to open its corresponding valve channel while the second valve core remains closed. Conversely, when both the first and second valve cores are in the initial state of closed valve channels, the driving part is coupled to the second valve core in the second direction opposite to the first direction through the second driven part, and decoupled from the first valve core through the first driven part, so that when the driving part moves along the second direction, the second valve core is driven to open its corresponding valve channel while the first valve core remains closed. Thus, the dual-channel valve device provided in this application achieves independent opening and closing control of the low-pressure channel and the high-pressure channel through a single driving component. While simplifying the structure and reducing costs, it significantly improves the accuracy of channel switching and sealing reliability, thereby meeting the refined control requirements for exhaust gas recirculation under all engine operating conditions. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of an embodiment of the dual-channel valve device of this application.

[0023] Figure 2 This is an exploded perspective view of an embodiment of the dual-channel valve device of this application.

[0024] Figure 3 This is another exploded perspective view of an embodiment of the dual-channel valve device of this application.

[0025] Figure 4 This is a perspective view of the valve seat and its internal connecting parts in one embodiment of the dual-channel valve device of this application.

[0026] Figure 5 This is a longitudinal sectional view of an embodiment of the dual-channel valve device of this application.

[0027] Figure 6 This is a transverse sectional view of an embodiment of the dual-channel valve device of this application, cut to the position where the driving gear and the driven gear are engaged.

[0028] Figure 7 This is a transverse sectional view of an embodiment of the dual-channel valve device of this application, cut to the position where the valve core and the valve channel mate.

[0029] Figure 8 This is a transverse sectional view of an embodiment of the dual-channel valve device of this application, showing the engagement position of the driving gear and the driven gear when the second valve core is opened.

[0030] Figure 9 This is a transverse sectional view of an embodiment of the dual-channel valve device of this application, showing the mating position of the valve core and the valve channel when the second valve core is opened.

[0031] The component labels are as follows:

[0032] 100. Dual-channel valve device; 1. Valve body; 11. Valve seat; 101. Valve channel; 110. Transmission chamber; 111. First limiting block; 112. Second limiting block; 12. Valve cover; 120. Drive chamber; 21. First valve core; 22. Second valve core; 3. Drive assembly; 31. Drive shaft; 41. Drive gear; 42. First driven gear; 421. First push block; 43. Second driven gear; 431. Second push block; 44. First linkage member; 441. First stop block; 442. First protrusion; 45. Second linkage member; 451. Second stop block; 452. Second protrusion; 51. First elastic member; 52. Second elastic member. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] 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 the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0035] 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 at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0038] Please see Figures 1 to 9As shown, this application provides a dual-channel valve device 100, including a valve body 1, a valve core disposed in the cavity of the valve body 1, and a drive assembly 3 for driving the valve core to move. The valve body 1 has at least two valve channels 101, and the valve core includes a first valve core 21 and a second valve core 22 that control the opening and closing of the two valve channels 101. The dual-channel valve device 100 also includes a transmission assembly, and the drive assembly 3 drives the first valve core 21 and the second valve core 22 to move through the transmission assembly. The transmission assembly includes an active part connected to the drive assembly 3, a first driven part linked to the first valve core 21, and a second driven part linked to the second valve core 22. The active part drives the first valve core 21 to move through the first driven part, and drives the second valve core 22 to move through the second driven part. In some embodiments, the first driven part and the second driven part can directly drive the first valve core 21 and the second valve core 22 to move, or they can further drive the first valve core 21 and the second valve core 22 to move indirectly through an intermediate component.

[0039] During the process of the drive assembly 3 driving the active part to move, the active part can be coupled to the first valve core 21 through the first driven part in a first direction, and decoupled from the second valve core 22 through the second driven part, so that when the active part moves along the first direction, the first valve core 21 is driven while the second valve core 22 remains stationary; the active part can be coupled to the second valve core 22 through the second driven part in a second direction opposite to the first direction, and decoupled from the first valve core 21 through the first driven part, so that when the active part moves along the second direction, the second valve core 22 is driven while the first valve core 21 remains stationary.

[0040] For example, in some embodiments, in an initial state, both the first valve core 21 and the second valve core 22 are in a closed valve passage 101 state. The active part is coupled to the first valve core 21 in a first direction through the first driven part and decoupled from the second valve core 22 through the second driven part, so that when the active part moves along the first direction, the first valve core 21 is driven to open its corresponding valve passage 101 while the second valve core 22 remains closed. In the initial state where both the first valve core 21 and the second valve core 22 are in a closed valve passage 101, the active part is coupled to the second valve core 22 in a second direction opposite to the first direction through the second driven part and decoupled from the first valve core 21 through the first driven part, so that when the active part moves along the second direction, the second valve core 22 is driven to open its corresponding valve passage 101 while the first valve core 21 remains closed.

[0041] With the above configuration, the dual-channel valve device 100 provided in this application realizes independent opening and closing control of the two valve channels 101 of the dual-channel valve device 100 through a single drive component 3. While simplifying the structure and reducing costs, it significantly improves the accuracy of channel switching and sealing reliability, thereby meeting the refined control requirements of exhaust gas recirculation under all engine operating conditions.

[0042] Please see Figures 1 to 3 As shown, the dual-channel valve device 100 of this embodiment mainly includes a valve body 1, a first valve core 21 and a second valve core 22 disposed within the valve body 1, a drive assembly 3 for driving the valve cores, and a transmission assembly connecting the drive assembly 3 and the valve cores. In this embodiment, the valve body 1 includes a valve seat 11 and a valve cover 12, which are fixedly connected by bolts, snap-fit ​​structures, or welding to form a sealed transmission chamber 110. The transmission assembly is installed and accommodated within the transmission chamber 110. A drive chamber 120 is provided on the side of the valve cover 12 away from the valve seat 11, and the drive assembly 3 is disposed within the drive chamber 120. The drive assembly 3 includes a motor, such as a stepper motor or a servo motor, and may further include a gear reducer. The drive assembly 3 extends into the transmission chamber 110 through the valve cover 12 via its drive shaft 31 and is connected to the active part of the transmission assembly, driving the valve cores to move through the transmission assembly. The drive assembly 3 may be partially located within the valve body 1 cavity, partially located outside the valve body 1 cavity, or entirely located outside the valve body 1 cavity.

[0043] In this embodiment, the valve body 1 adopts a split structure, assembled from a valve seat 11 and a valve cover 12. The valve cover 12 is connected to the valve seat 11 by a sealing ring, forming a sealed transmission chamber 110. The drive assembly 3 is fixed to the outside of the valve cover 12 by screws, and its drive shaft 31 passes through the valve cover 12 through a bearing or bushing to ensure smooth rotation and no leakage. The transmission assembly is completely enclosed within the transmission chamber 110, protected from external contamination and impact.

[0044] The valve seat 11 has two independent valve channels 101, corresponding to a high-pressure gas channel and a low-pressure gas channel, respectively. Specifically, in one embodiment, the dual-channel valve device 100 is an EGR valve, with the two valve channels 101 being the high-pressure EGR and low-pressure EGR paths for waste gas recirculation, respectively. The first valve core 21 and the second valve core 22 are mounted in the valve channels 101 of the valve seat 11 via a rotating shaft, used to control the opening and closing of the corresponding valve channels 101. In this embodiment, the first valve core 21 and the second valve core 22 are circular plates matching the cross-section of the valve channels 101, and are driven to rotate by the rotating shaft, which in turn is driven to rotate by the drive assembly 3 and the transmission assembly. When the circular plate-shaped valve core rotates to a position where its plane is perpendicular to the axis of the valve channel 101, the valve channel 101 is closed, preventing fluid from passing through; when the circular plate-shaped valve core rotates to a position where its plane is not perpendicular to the axis of the valve channel 101, the valve channel 101 is opened, allowing fluid to pass through. It is understandable that the opening degree of the valve core varies depending on the angle of rotation. When the valve core rotates to the point where its plane is parallel to the axis of the valve channel 101, the obstruction to the fluid is minimal, which is the maximum opening degree.

[0045] The core innovation of the dual-channel valve device 100 provided in this application lies in the design of the transmission component. It achieves independent control of the two valve cores through a single drive source, solving the problems of volume redundancy and control synchronization caused by configuring multiple actuators in traditional dual-channel valve devices 100. The structure and linkage logic of each component are described in detail below with reference to the accompanying drawings.

[0046] Please see Figures 2 to 5 As shown, in this embodiment, the driving part includes a driving gear 41, the first driven part includes a first driven gear 42, and the second driven part includes a second driven gear 43. The driving gear 41 meshes simultaneously with the first driven gear 42 and the second driven gear 43 to drive the first driven gear 42 and the second driven gear 43 to rotate synchronously. Specifically, the transmission assembly includes a driving gear 41, a first driven gear 42, and a second driven gear 43. The driving gear 41 is press-fitted to the end of the drive shaft 31. The driving gear 41 and the drive shaft 31 are connected by a D-shaped shaft and hole to ensure synchronous rotation. The driving gear 41 meshes simultaneously with the first driven gear 42 and the second driven gear 43, and the rotational motion of the driving gear 41 is transmitted to the two driven gears, causing them to rotate synchronously. In this embodiment, the two driven gears and the driving gear 41 are always in a meshed state, making the transmission smoother and more stable.

[0047] In this embodiment, although the first driven gear 42 and the second driven gear 43 rotate synchronously, there is a decoupled state between the first driven gear 42 and the second driven gear 43 and the first valve core 21 and the second valve core 22 they drive respectively, which allows for relative movement. That is, the first driven gear moves but does not apply a transmission force to the first valve core, and the second driven gear moves but does not apply a transmission force to the second valve core. Therefore, asynchronous movement of the first valve core 21 and the second valve core 22 can be achieved. Specifically, the first driven part also includes a first linkage member 44 fixedly connected to the rotation shaft of the first valve core 21. The first linkage member 44 includes a first stop 441. The first driven gear 42 has a first push block 421 that cooperates with the first stop 441. When the first driven gear 42 moves along the first direction, it pushes against the first push block 421. When the first driven gear 42 moves along the second direction, it disengages from the first push block 421. The second driven part further includes a second linkage member 45 fixedly connected to the rotation shaft of the second valve core 22. The second linkage member 45 includes a second stop 451, and the second driven gear 43 has a second push block 431 that cooperates with the second stop 451. When the second driven gear 43 moves in the second direction, it pushes against the second push block 431. When the second driven gear 43 moves in the first direction, it disengages from the second push block 431. That is, when the first driven gear 42 drives the first linkage member 44 to move synchronously, thereby driving the first valve core 21 to rotate, the second driven gear 43 moves idle relative to the second linkage member 45, thereby not driving the second valve core 22 to rotate, so as to achieve independent control of the opening of the first valve core 21. Conversely, when the second driven gear 43 drives the second linkage member 45 to move synchronously, thereby driving the second valve core 22 to rotate, the first driven gear 42 moves idle relative to the first linkage member 44, thereby not driving the first valve core 21 to rotate, so as to achieve independent control of the opening of the second valve core 22. In this embodiment, the first linkage 44 and the second linkage 45 are respectively connected to the rotating shafts of the first valve core 21 and the second valve core 22 through keyways, pins, interference fits, etc., so as to convert the rotational motion of the driven gear into the angular displacement of the valve core.

[0048] See below. Figures 6 to 9 The specific process of coupling and decoupling between the push block and the stop block is explained.

[0049] Please see Figure 6 and Figure 7The diagram shows the initial positions of the transmission assembly and valve core. In this embodiment, the inner ring of the first driven gear 42 has two protruding first pushing blocks 421. These two first pushing blocks 421 are arranged opposite each other, that is, they are on the same straight line and form an angle of approximately 180° between them. The first linkage member 44 has a central connecting portion sleeved on the rotating shaft of the first valve core 21, and two first stop blocks 441 protruding outward from the central connecting portion. The two first stop blocks 441 are arranged opposite each other, that is, they are on the same straight line and form an angle of approximately 180° between them. The two first pushing blocks 421 and the two first stop blocks 441 are arranged alternately, and one side of each first pushing block 421 abuts against one side of a first stop block 441. When the first push block 421 moves toward the first stop block 441 that is against it, it will push the first stop block 441 to rotate; when the first push block 421 moves away from the first stop block 441 that is against it, the first stop block 441 remains stationary.

[0050] Similarly, the structure and arrangement of the second push block 431 on the second driven gear 43, and the structure and arrangement of the second stop block 451 on the second linkage member 45 are similar to those described above, and will not be repeated here. The only difference is that the engagement position of the first push block 421 and the first stop block 441, and the engagement position of the second push block 431 and the second stop block 451 are different.

[0051] Specifically, in this embodiment, in the initial state, that is, when both valve cores are closed in valve channel 101, as follows: Figure 6 As shown, at this time, the first stop 441 on the first linkage 44 and the first push block 421 of the first driven gear 42 are in the initial contact position, and the second stop 451 of the second linkage 45 and the second push block 431 of the second driven gear 43 are also in the initial contact position. Figure 6 As shown, the initial contact position of the first pushing block 421 and the first blocking block 441 is specifically such that, in the clockwise direction, the first pushing block 421 is located downstream of the first blocking block 441; the initial contact position of the second pushing block 431 and the second blocking block 451 is specifically such that, in the clockwise direction, the second pushing block 431 is located upstream of the second blocking block 451.

[0052] In this way, when the drive component 3 drives the drive gear 41 along the first direction (e.g., Figure 6When the first driven gear 42 rotates counterclockwise in the state shown, its first push block 421 pushes the first stop block 441, causing the first linkage 44 to rotate, thereby opening the valve channel 101 corresponding to the first valve core 21. At this time, the second driven gear 43 rotates counterclockwise due to the reverse transmission action of the drive gear 41, causing the second push block 431 to disengage from the second stop block 451, the second linkage 45 remains stationary, and the second valve core 22 remains in the closed state.

[0053] Conversely, when the driving gear 41 is along the second direction (such as...) Figure 8 When the first driven gear 42 rotates counterclockwise (as shown in the diagram), the second driven gear 43 drives the second push block 431 to push against the second stop block 451, driving the second linkage 45 to rotate and open the valve channel 101 corresponding to the second valve core 22; at the same time, the first driven gear 42 rotates clockwise, its first push block 421 disengages from the first stop block 441, and the first valve core 21 remains closed, as shown in the diagram. Figure 9 As shown.

[0054] In this design, the rotation direction of the single drive source determines the coupling state between the transmission component and a certain valve core, thereby achieving independent control of the two channels.

[0055] Furthermore, to prevent excessive rotation of the valve core from causing sealing failure or component damage, a limiting block is provided on the valve body 1. In this embodiment, the valve body 1 is provided with a first limiting block 111 that abuts against the first linkage member 44 to limit the maximum rotation angle of the first linkage member 44. The valve body 1 is provided with a second limiting block 112 that abuts against the second linkage member 45 to limit the maximum rotation angle of the second linkage member 45. Specifically, as shown... Figure 2 , 4 As shown in Figures 6 and 8, a first limiting block 111 and a second limiting block 112 protrude from the inner side of the valve seat 11. A first protrusion 442 and a second protrusion 452 protrude from the first linkage member 44 and the second linkage member 45. The first protrusion 442 is located below the first stop 441 and protrudes beyond the first stop 441, and the first limiting block 111 extends into the rotation path of the first protrusion 442. Similarly, the second protrusion 452 is located below the second stop 451 and protrudes beyond the second stop 451, and the second limiting block 112 extends into the rotation path of the second protrusion 452. When the first linkage member 44 rotates with the valve core to its maximum rotation angle, its first protrusion 442 abuts against the first limiting block 111, restricting its further rotation. Similarly, when the second protrusion 452 of the second linkage member 45 contacts the second limiting block 112, the second valve core 22 reaches its maximum rotation angle.

[0056] Furthermore, a first elastic element 51 is installed inside the valve body 1, with one end connected to the valve body 1 and the other end connected to the first linkage 44, so as to provide an elastic force for the first valve core 21 to return to the initial state when the first linkage 44 rotates away from the initial state; and / or, a second elastic element 52 is installed inside the valve body 1, with one end connected to the valve body 1 and the other end connected to the second linkage 45, so as to provide an elastic force for the second valve core 22 to return to the initial state when the second linkage 45 rotates away from the initial state. In the initial state, the first protrusion 442 abuts against one side of the first limiting block 111, and the second protrusion 452 abuts against one side of the second limiting block 112.

[0057] Specifically, such as Figure 2 , 4 As shown in Figure 5, a first elastic element 51 and a second elastic element 52 are installed inside the valve seat 11. Preferably, the first elastic element 51 and the second elastic element 52 are helical torsion springs. One end of the first elastic element 51 is snapped and fixed to the valve seat 11, and the other end is snapped to the first linkage 44; the second elastic element 52 is connected to the second linkage 45 and the valve seat 11 in the same manner. When the valve core is driven to open, the elastic element undergoes torsional deformation and stores elastic potential energy. When the drive assembly 3 is de-energized or rotates in the reverse direction, the elastic element releases energy and pushes the linkage to reset to its initial state. The elastic reset design not only simplifies the drive control logic but also ensures safe valve closure in the event of a power outage.

[0058] In another embodiment, asynchronous independent control of the first valve core 21 and the second valve core 22 can be achieved through a half-tooth structure, i.e., an incomplete gear or a sector gear. Specifically, the driving gear 41 has a sector-shaped tooth segment, which meshes with one of the first driven gear 42 and the second driven gear 43 and disengages from the other, and / or, the first driven gear 42 and the second driven gear 43 have sector-shaped tooth segments, and the driving gear 41 meshes with one of the first driven gear 42 and the second driven gear 43 and disengages from the other.

[0059] In a specific application scenario, the dual-channel valve device 100 provided in this application is specifically an EGR valve, with two valve channels 101 connected to a high-pressure EGR system and a low-pressure EGR system, respectively. When the high-pressure EGR system needs to be connected, the drive component 3 drives the drive gear 41 to rotate in the second direction, opening the high-pressure EGR channel corresponding to the second valve core 22; when the low-pressure EGR system needs to be connected, the drive gear 41 rotates in the first direction, opening the low-pressure EGR channel corresponding to the first valve core 21. Since the switching of the dual channels depends only on the rotation direction of a single drive source, the system structure is compact, the control response is rapid, and the flow fluctuations caused by asynchronous actions of multiple actuators are avoided. Of course, the dual-channel valve device 100 provided in this application can also be applied to applications of liquid valves such as water valves that require flow switching.

[0060] The following reference Figures 5 to 9 The working process of one embodiment of the dual-channel valve device 100 is explained.

[0061] In the initial state, the drive assembly 3 is not energized, and the two valve cores are in the closed position under the action of the first elastic element 51 and the second elastic element 52, and the valve channels 101 are blocked.

[0062] When the low-pressure channel needs to be opened, the drive assembly 3 receives a control signal, the drive shaft 31 rotates clockwise, the drive gear 41 drives the first driven gear 42 to rotate, the first push block 421 pushes the first stop block 441, causing the first linkage 44 to rotate over the resistance of the first elastic member 51, and the first valve core 21 opens the low-pressure valve channel 101. At this time, the second driven gear 43 rotates in the opposite direction, the second push block 431 disengages from the second stop block 451, and the second valve core 22 remains closed.

[0063] When the high-pressure channel needs to be opened, the drive assembly 3 reverses, the drive shaft 31 rotates counterclockwise, the second push block 431 of the second driven gear 43 pushes the second stop block 451, the second linkage 45 drives the second valve core 22 to open the high-pressure valve channel 101, and at the same time the first driven gear 42 disengages from the first linkage 44, and the first valve core 21 is reset and closed under the action of the first elastic member 51.

[0064] As described above in the specific embodiments, the dual-channel valve device 100 provided in this application achieves independent control of both channels through a single drive source and gear transmission assembly, significantly reducing the device size and solving the problem of difficult arrangement of multiple actuators. Through the mechanical linkage of gear meshing and stop block pushing, precise synchronization of valve core opening and closing actions is ensured, avoiding flow regulation lag. Elastic reset and limit design provide dual protection for valve core position stability, preventing overshoot or jamming. The enclosed transmission chamber enhances environmental adaptability. Redundant drive components are eliminated, reducing manufacturing costs and maintenance complexity. This achieves a significant improvement in the accuracy of channel switching and sealing reliability while simplifying the structure and reducing costs.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A dual-channel valve device, comprising a valve body (1), a valve core disposed in the cavity of the valve body (1), and a drive assembly (3) for driving the valve core to move, wherein the valve body (1) has at least two valve channels (101), and the valve core includes a first valve core (21) and a second valve core (22) for controlling the opening and closing of the two valve channels (101), characterized in that, The dual-channel valve device further includes a transmission assembly. The drive assembly (3) drives the first valve core (21) and the second valve core (22) to move through the transmission assembly. The transmission assembly includes an active part connected to the drive assembly (3), a first driven part linked to the first valve core (21), and a second driven part linked to the second valve core (22). The active part drives the first valve core (21) to move through the first driven part and drives the second valve core (22) to move through the second driven part. During the process of the drive assembly (3) driving the active part to move, the active part can move in a first direction. The first driven part is coupled to the first valve core (21) and decoupled from the second valve core (22) through the second driven part, so that when the active part moves along the first direction, the first valve core (21) is driven while the second valve core (22) remains stationary. The active part can be coupled to the second valve core (22) through the second driven part in a second direction opposite to the first direction and decoupled from the first valve core (21) through the first driven part, so that when the active part moves along the second direction, the second valve core (22) is driven while the first valve core (21) remains stationary.

2. The dual-channel valve device according to claim 1, characterized in that, The active part includes an active gear (41), the first driven part includes a first driven gear (42), and the second driven part includes a second driven gear (43). The active gear (41) meshes with the first driven gear (42) and the second driven gear (43) simultaneously to drive the first driven gear (42) and the second driven gear (43) to rotate synchronously.

3. The dual-channel valve device according to claim 2, characterized in that, The first driven part further includes a first linkage member (44) fixedly connected to the rotation shaft of the first valve core (21). The first linkage member (44) includes a first stop (441). The first driven gear (42) has a first push block (421) that cooperates with the first stop (441). When the first driven gear (42) moves in the first direction, it pushes against the first push block (421). When the first driven gear (42) moves in the second direction, it disengages from the first push block (421); and / or, The second driven part further includes a second linkage member (45) fixedly connected to the rotation shaft of the second valve core (22). The second linkage member (45) includes a second stop (451). The second driven gear (43) has a second push block (431) that cooperates with the second stop (451). When the second driven gear (43) moves along the second direction, it pushes against the second push block (431). When the second driven gear (43) moves along the first direction, it disengages from the second push block (431).

4. The dual-channel valve device according to claim 3, characterized in that, The valve body (1) is provided with a first limiting block (111) that abuts against the first linkage member (44) to limit the maximum rotation angle of the first linkage member (44); and / or, the valve body (1) is provided with a second limiting block (112) that abuts against the second linkage member (45) to limit the maximum rotation angle of the second linkage member (45).

5. The dual-channel valve device according to claim 3, characterized in that, A first elastic element (51) is installed inside the valve body (1), one end of the first elastic element (51) is connected to the valve body (1) and the other end is connected to the first linkage element (44), so as to provide an elastic force for the first valve core (21) to return to the initial state when the first linkage element (44) rotates away from the initial state; and / or, a second elastic element (52) is installed inside the valve body (1), one end of the second elastic element (52) is connected to the valve body (1) and the other end is connected to the second linkage element (45), so as to provide an elastic force for the second valve core (22) to return to the initial state when the second linkage element (45) rotates away from the initial state.

6. The dual-channel valve device according to claim 5, characterized in that, The first elastic element (51) and the second elastic element (52) are helical torsion springs.

7. The dual-channel valve device according to claim 3, characterized in that, There are two first push blocks (421), which protrude from the inner ring of the first driven gear (42) towards each other. There are two first stop blocks (441), which protrude from the middle of the first linkage (44) away from each other. The two first push blocks (421) and the two first stop blocks (441) are arranged alternately, and one side of each first push block (421) is abutted against one side of a first stop block (441); and / or, There are two second push blocks (431), which protrude from the inner ring of the second driven gear (43) towards each other. There are two second stop blocks (451), which protrude from the middle of the second linkage (45) away from each other. The two second push blocks (431) and the two second stop blocks (451) are arranged alternately, and one side of each second push block (431) is attached to one side of a second stop block (451).

8. The dual-channel valve device according to claim 1, characterized in that, The driving part includes a driving gear (41), the first driven part includes a first driven gear (42), and the second driven part includes a second driven gear (43); wherein the driving gear (41) has a sector-shaped tooth segment, and when the sector-shaped tooth segment meshes with one of the first driven gear (42) and the second driven gear (43), it disengages from the other, and / or, the first driven gear (42) and the second driven gear (43) have sector-shaped tooth segments, and when the driving gear (41) meshes with one of the first driven gear (42) and the second driven gear (43), it disengages from the other.

9. The dual-channel valve device according to any one of claims 1 to 8, characterized in that, The valve body (1) includes a valve seat (11) and a valve cover (12) fixed to the valve seat (11). A drive chamber (120) is provided on the side of the valve cover (12) away from the valve seat (11). The drive assembly (3) is disposed in the drive chamber (120).

10. The dual-channel valve device according to claim 9, characterized in that, A transmission chamber (110) is provided between the valve cover (12) and the valve seat (11), and the transmission assembly is disposed in the transmission chamber (110).

11. The dual-channel valve device according to any one of claims 1 to 8, characterized in that, The dual-channel valve device is an EGR valve, and one of the two valve channels (101) is a high-pressure gas channel and the other is a low-pressure gas channel.

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