Flow valve

Abstract

The utility model relates to the technical field of valves, and discloses a flow valve which comprises a valve body and a first valve element, the valve body is provided with a first valve cavity, a first step face is formed in the first valve cavity, the valve body is provided with a liquid inlet and a first liquid outlet, the liquid inlet communicates with a first sub-cavity, the first liquid outlet communicates with a second sub-cavity, and the first direction is parallel to the axial direction of the valve body; in the first direction, the first valve element is movably arranged in the second sub-cavity so as to block or open the first liquid outlet, the first valve element is provided with a first end face and a second end face which are oppositely arranged in the first direction, the first end face is closer to the first sub-cavity than the second end face, and the first end face selectively abuts against the first step face. Therefore, the first step face formed in the first valve cavity is used for axially limiting the first valve element, the risk that the first valve element falls off from the interior of the valve body can be reduced, and the running reliability of the flow valve can be improved.

Description

Technical Field

[0001] This application relates to the field of valve technology, and more particularly to a flow valve. Background Technology

[0002] In the field of hydraulic transmission systems and fluid control, flow valves are key actuators, and the axial limiting structure of their internal valve cores directly affects the reliability of their operation.

[0003] In related technologies, traditional flow valves typically use a limiting structure fixed to the inner wall of the valve body to axially limit the valve core and prevent it from moving out of the flow valve. However, during long-term use of the flow valve, the limiting component may detach from the valve body due to stress fatigue deformation, resulting in valve core limiting failure and causing the valve core to fall out of the inlet of the flow valve, which greatly reduces the reliability of the flow valve operation. Utility Model Content

[0004] This application provides a flow valve that uses a first step formed within a first valve cavity to axially limit the first valve core, making the limiting of the first valve core more stable and reliable. This reduces the risk of the first valve core detaching from the valve body and improves the reliability of the flow valve's operation.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, embodiments of this application provide a flow valve, comprising:

[0007] The valve body has a first valve cavity. Along a first direction, the first valve cavity includes a first sub-cavity and a second sub-cavity connected in sequence. The inner diameter of the first sub-cavity is smaller than the inner diameter of the second sub-cavity to form a first stepped surface. The valve body has a liquid inlet and a first liquid outlet. The liquid inlet is connected to the first sub-cavity, and the first liquid outlet is connected to the second sub-cavity. The first direction is parallel to the axial direction of the valve body.

[0008] The first valve core is movably disposed in the second sub-cavity along the first direction to block or open the first liquid outlet;

[0009] Along the first direction, the first valve core has a first end face and a second end face that are disposed opposite to each other. The first end face is closer to the first sub-cavity than the second end face. The first end face can selectively abut against the first stepped surface.

[0010] According to the flow valve proposed in the embodiments of this application, the flow valve uses a first step formed in the first valve cavity to axially limit the first valve core, making the limiting of the first valve core more stable and reliable, reducing the risk of the first valve core falling out of the valve body, and improving the reliability of the flow valve operation. At the same time, by using the first step in the first valve cavity to limit the first valve core, there is no need to install a special limiting structure in the valve body, reducing the number of parts in the valve body. This not only makes the valve body structure more compact, but also helps to reduce the processing cost of the valve body.

[0011] Optionally, along the first direction, the second sub-cavity includes a first segment and a second segment connected in sequence, the first segment being closer to the first sub-cavity than the second segment, and the first segment being connected to the first sub-cavity;

[0012] The inner diameter of the first segment is larger than the inner diameter of the second segment to form the second stepped surface.

[0013] Optionally, the flow valve further includes a first valve seat and a first spring. At least a portion of the first valve seat is fixedly installed inside the first valve core. The first spring is disposed inside the first valve core and sleeved on the outer peripheral surface of the first valve seat. Along the first direction, the first spring is abutted between the first valve core and the first valve seat so that the first end face abuts against the first stepped surface.

[0014] Along the first direction, the projection of the first sub-cavity overlaps with the projection of the first end face.

[0015] Optionally, the first valve core has a second valve cavity. Along the first direction, the second valve cavity includes a third sub-cavity and a fourth sub-cavity that are connected in sequence. The inner diameter of the third sub-cavity is smaller than the inner diameter of the fourth sub-cavity to form a third stepped surface.

[0016] Along the first direction, the first valve seat includes a first body and a second body connected in sequence. At least a portion of the first body and the second body are both disposed in the second valve cavity. The outer diameter of the first body is smaller than the outer diameter of the second body to form a fourth stepped surface.

[0017] The first spring is located in the second valve cavity and sleeved on the outer peripheral surface of the first body. Along the first direction, the first spring is abutted between the third step surface and the fourth step surface.

[0018] Optionally, the valve body also has a second outlet, which is further away from the first sub-cavity than the first outlet along the first direction;

[0019] The flow valve also includes a second valve seat. Along the first direction, the second valve seat is located on the side of the first valve seat away from the first sub-cavity and abuts against the first valve seat. A portion of the second valve seat is fixedly installed in the second sub-cavity, and a portion of the first valve core is sleeved on the outer peripheral surface of the second valve seat, so that the second valve seat, valve body, and first valve core together form a flow guiding channel. The second valve seat has a third liquid outlet, and the third liquid outlet is connected to the second liquid outlet through the flow guiding channel.

[0020] The flow valve also includes a second valve core. At least a portion of the second valve core passes through a second valve seat along a first direction. The second valve core has a second flow channel and a fourth outlet. The first valve seat has a first flow channel. The second flow channel communicates with the fourth outlet and is connected to a first sub-cavity through the first flow channel. The second valve core is movable relative to the second valve seat along the first direction so that the fourth outlet can selectively communicate with a third outlet.

[0021] Optionally, the flow valve further includes an electromagnetic drive assembly mounted on the valve body. The electromagnetic drive assembly is used to drive the second valve core to move in the second valve seat along a first direction, so that the fourth outlet can selectively communicate with the third outlet.

[0022] Optionally, the electromagnetic drive assembly includes a magnetic sleeve and a magnetic element. The magnetic sleeve is fixedly connected to the valve body, and the magnetic element is movably disposed inside the magnetic sleeve along the first direction. The magnetic element is connected to the second valve core through a push rod.

[0023] Optionally, the magnetic sleeve and the valve body form a receiving space. Along the first direction, the second valve core includes a third body and a fourth body connected in sequence. The third body passes through the second valve seat and has a second flow channel and a fourth liquid outlet. A portion of the fourth body is located in the receiving space and is fixedly connected to the push rod.

[0024] Optionally, the flow valve further includes a first limiting member, a second limiting member, and a second spring. Along the first direction, the first limiting member and the second limiting member are spaced apart. The first limiting member is further away from the second valve seat than the second limiting member. Both the first limiting member and the second limiting member are sleeved on the fourth body. The first limiting member is fixedly connected to the fourth body. Along the first direction, the second limiting member abuts against the second valve seat. The second spring is abutted and installed between the first limiting member and the second limiting member.

[0025] Optionally, the flow valve also includes a seal, the second valve seat is provided with a sealing groove, along the first direction, the sealing groove is located on the side of the third outlet away from the inlet, and the seal is located between the sealing groove and the inner wall of the second sub-cavity. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is an overall cross-sectional view of a flow valve provided in one embodiment of this application;

[0028] Figure 2 A cross-sectional view of a flow valve assembly structure provided in one embodiment of this application;

[0029] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0030] [Explanation of Labels in the Attached Image]

[0031] Flow valve 100;

[0032] Valve body 1; first valve chamber 11; first sub-chamber 111; second sub-chamber 112; first section 1121; second section 1122; second step surface 1123; first step surface 113; inlet 12; first outlet 13; second outlet 14;

[0033] First valve core 2; First end face 21; Second end face 22; Second valve cavity 23; Third sub-cavity 231; Fourth sub-cavity 232; Third stepped surface 233;

[0034] Second valve seat 3; Third outlet 31; Sealing groove 32; Third valve chamber 33;

[0035] Diversion channel 4;

[0036] Second valve core 5; second flow channel 51; fourth liquid outlet 52; third main body 53; fourth main body 54;

[0037] First valve seat 6; First flow channel 61; First main body 62; Second main body 63; Fourth stepped surface 64;

[0038] First spring 7;

[0039] Electromagnetic drive assembly 8; magnetic sleeve 81; magnetic component 82; push rod 83; locking cap 84; third limit component 85;

[0040] Capacity space 9;

[0041] First limiting component 10; second limiting component 20; second spring 30; sealing component 40;

[0042] First direction X. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0044] 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 pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0045] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0046] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0047] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0048] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0049] It should be noted that in the field of hydraulic transmission systems and fluid control, the axial limiting structure of the internal valve core of the flow valve, as a key actuator, is directly related to the reliability of the flow valve's operation.

[0050] In related technologies, traditional flow valves typically employ a limiting structure fixed to the inner wall of the valve body to axially limit the valve core, preventing it from moving out of the flow valve's inlet. For example, the limiting component is constructed as a wire retaining ring, with an annular groove machined on the inner wall of the valve body near the inlet. The wire retaining ring is press-fitted into the annular groove to restrict the axial movement of the valve core.

[0051] However, the fit between the wire retaining ring and the annular groove is an interference fit. During long-term use of the flow valve, the wire retaining ring is prone to fatigue deformation due to alternating stress. At the same time, the radial impact during the movement of the valve core may also cause local deformation of the wire retaining ring. All of these can cause the wire retaining ring to fall off from the inside of the valve body, resulting in the failure of the valve core limit and the valve core falling off from the inlet of the flow valve, which greatly reduces the reliability of the flow valve operation.

[0052] Based on this, this application proposes a flow valve 100, which uses a first stepped surface 113 formed in the first valve cavity 11 to axially limit the first valve core 2, making the limiting of the first valve core 2 more stable and reliable, reducing the risk of the first valve core 2 falling out of the valve body 1, and improving the reliability of the operation of the flow valve 100. At the same time, by using the first stepped surface 113 in the first valve cavity 11 to limit the first valve core 2, there is no need to install a special limiting structure in the valve body 1, reducing the number of parts in the valve body 1. This not only makes the structure of the valve body 1 more compact, but also helps to reduce the processing cost of the valve body 1.

[0053] The flow valve 100 proposed in the embodiments of this application is described below with reference to the accompanying drawings.

[0054] like Figures 1-3 As shown, the flow valve 100 according to an embodiment of this application includes: a valve body 1 and a first valve core 2. The valve body 1 has a first valve cavity 11. Along the first direction X, the first valve cavity 11 includes a first sub-cavity 111 and a second sub-cavity 112 connected in sequence. The inner diameter of the first sub-cavity 111 is smaller than the inner diameter of the second sub-cavity 112 to form a first stepped surface 113. The valve body 1 has an inlet 12 and a first outlet 13. The inlet 12 is connected to the first sub-cavity 111, and the first outlet 13 is connected to the second sub-cavity 112. The first direction X is parallel to the axial direction of the valve body 1. Along the first direction X, the first valve core 2 is movably disposed in the second sub-cavity 112 to block or open the first outlet 13. Along the first direction X, the first valve core 2 has a first end face 21 and a second end face 22 disposed opposite to each other. The first end face 21 is closer to the first sub-cavity 111 than the second end face 22. The first end face 21 can selectively abut against the first stepped surface 113.

[0055] Specifically, taking flow valve 100 according to Figure 1 and Figure 2Taking the placement direction shown as an example, a first valve cavity 11 extending along the first direction X is formed inside the valve body 1. The first direction X is the left and right direction. The axial direction of the valve body 1 is parallel to the left and right direction. That is to say, the first valve cavity 11 extends in the left and right direction inside the valve body 1.

[0056] like Figure 2 and Figure 3 As shown, the first valve chamber 11 consists of a first sub-chamber 111 and a second sub-chamber 112, wherein the first sub-chamber 111 is connected to the second sub-chamber 112, the first sub-chamber 111 is located to the right of the second sub-chamber 112, and the first sub-chamber 111 is connected to the liquid inlet 12 of the valve body 1. Optionally, as shown... Figure 1 and Figure 2 As shown, the inlet 12 of the valve body 1 is located on the right end face of the valve body 1 along the first direction X, and the second sub-cavity 112 is connected to the first outlet 13 of the valve body 1. Optionally, as shown... Figure 1 and Figure 2 As shown, the first liquid outlet 13 of the valve body 1 is located on the side of the valve body 1, and along the first direction X, the first liquid outlet 13 is located on the left side of the first sub-cavity 111.

[0057] Furthermore, the second sub-cavity 112 is also equipped with a first valve core 2, as described in the reference section. Figure 1 and Figure 2 As shown, the first valve core 2 can move left and right in the second sub-cavity 112 along the first direction X, so that the first valve core 2 can block or open the first liquid outlet 13. It can be understood that when the first valve core 2 blocks the first liquid outlet 13, the fluid flowing into the inlet 12 of the valve body 1 cannot flow out from the first liquid outlet 13. When the first valve core 2 opens the first liquid outlet 13, the fluid flowing into the inlet 12 of the valve body 1 flows through the first sub-cavity 111 and the second sub-cavity 112 in sequence and then flows out from the first liquid outlet 13.

[0058] It should be noted that when the first valve core 2 is assembled with the valve body 1 and when the first valve core 2 moves left and right in the second sub-cavity 112, it is necessary to prevent the first valve core 2 from moving out of the liquid inlet 12 of the valve body 1.

[0059] Based on this, the inner diameter of the first sub-cavity 111 is set to be smaller than the inner diameter of the second sub-cavity 112, so as to form a first stepped surface 113 at the connection between the first sub-cavity 111 and the second sub-cavity 112. Further, along the first direction X, the first valve core 2 has a first end face 21 and a second end face 22 disposed opposite to each other. The first end face 21 is closer to the first sub-cavity 111 than the second end face 22. This configuration allows the first end face 21 to selectively abut against the first stepped surface 113 when the first valve core 2 moves left or right along the first direction X. For example, when the first valve core 2 moves left along the first direction X, the first valve core 2 separates from the first stepped surface 113, and when the first end face 21 of the first valve core 2 moves to the first outlet 13 along the first direction X... When the position is moved to the left side of the first outlet 13, the first valve core 2 opens the first outlet 13. When the first valve core 2 moves to the right along the first direction X, the first valve core 2 gradually approaches the first step surface 113. When the first end face 21 of the first valve core 2 is completely located on the right side of the first outlet 13, the first valve core 2 blocks the first outlet 13. As the first valve core 2 continues to move to the right, the first end face 21 of the first valve core 2 can abut against the first step surface 113, which can prevent the first valve core 2 from continuing to move to the right and falling off from the inlet 12 of the valve body 1.

[0060] Compared to the traditional flow valve 100 which uses a wire retaining ring fixed to the inner wall of the valve body 1 for limiting, this application uses the first stepped surface 113 in the first valve cavity 11 to axially limit the first valve core 2. There is no need to worry about the valve core limiting failure caused by the wire retaining ring falling off, making the limiting of the first valve core 2 more stable and reliable. This helps to reduce the risk of the first valve core 2 falling off the valve body 1, thereby improving the reliability of the flow valve 100. At the same time, by using the first stepped surface 113 in the first valve cavity 11 to limit the first valve core 2, there is no need to install special limiting structures such as wire retaining rings in the valve body 1, reducing the number of parts in the valve body 1. This not only makes the structure of the valve body 1 more compact, but also helps to reduce the processing cost of the valve body 1.

[0061] In some embodiments of this application, such as Figure 2 and Figure 3 As shown, along the first direction X, the second sub-cavity 112 includes a first segment 1121 and a second segment 1122 connected in sequence. The first segment 1121 is closer to the first sub-cavity 111 than the second segment 1122. The first segment 1121 is connected to the first sub-cavity 111, and the inner diameter of the first segment 1121 is larger than the inner diameter of the second segment 1122 to form a second stepped surface 1123. Specifically, as... Figure 3As shown, the first segment 1121 is disposed between the first sub-cavity 111 and the second segment 1122. The second step surface 1123 is disposed opposite to and spaced apart from the first step surface 113 along the first direction X. Optionally, the first segment 1121 can be constructed as a tool relief groove. With this configuration, when machining the second sub-cavity 112, the first segment 1121 can provide a clearance structure for the tool, thereby facilitating the finishing of the second sub-cavity 112 inside the valve body 1.

[0062] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the flow valve 100 also includes a first valve seat 6 and a first spring 7. At least a portion of the first valve seat 6 is fixedly installed inside the first valve core 2. The fixed installation method includes, but is not limited to, snap-fit ​​fixing and abutment fixing. The first spring 7 is disposed inside the first valve core 2 and sleeved on the outer peripheral surface of the first valve seat 6. Along the first direction X, the first spring 7 is abutted between the first valve core 2 and the first valve seat 6 so that the first end face 21 abuts against the first step surface 113. Along the first direction X, the projection of the first sub-cavity 111 overlaps with the projection of the first end face 21.

[0063] Specifically, such as Figure 2 As shown, in the initial state, the first spring 7 is compressed, so the first valve core 2 is pressed against the first stepped surface 113 by the first spring 7. According to the working principle of the flow valve 100, when fluid flows into the first sub-cavity 111 from the inlet 12 of the valve body 1, the fluid pushes the first valve core 2 to move. In order to ensure the normal movement of the first valve core 2 and prevent the first stepped surface 113 from hindering the fluid from applying a thrust to the first valve core 2, in this application, the projection of the first sub-cavity 111 along the first direction X is set to overlap with the projection of the first end face 21. In this way, when fluid flows into the first sub-cavity 111, the fluid in the first sub-cavity 111 can exert a thrust on the first valve core. When the first end face 21 of the fluid is subjected to a thrust, it can be understood that when the thrust applied to the first end face 21 by the fluid is greater than the elastic force of the first spring 7, the fluid drives the first valve core 2 to move to the left, so that the first valve core 2 opens the first outlet 13. As the first valve core 2 moves to the left, the first valve core 2 compresses the first spring 7, so that the first spring 7 continues to accumulate elastic force. When the inlet 12 stops delivering fluid, the thrust on the first end face 21 disappears, and the first valve core 2 moves to the right and resets under the drive of the first spring 7, so that the first valve core 2 blocks the first outlet 13 and the first end face 21 re-abuts against the first stepped surface 113.

[0064] In some embodiments of this application, such as Figure 1 and Figure 2As shown, the first valve core 2 has a second valve cavity 23. Along the first direction X, the second valve cavity 23 includes a third sub-cavity 231 and a fourth sub-cavity 232 connected in sequence. The inner diameter of the third sub-cavity 231 is smaller than the inner diameter of the fourth sub-cavity 232 to form the fourth sub-cavity 232. Along the first direction X, the first valve seat 6 includes a first body 62 and a second body 63 connected in sequence. At least a portion of the first body 62 and the second body 63 are both disposed in the second valve cavity 23. The outer diameter of the first body 62 is smaller than the outer diameter of the second body 63 to form a fourth stepped surface 64. A first spring 7 is disposed in the second valve cavity 23 and sleeved on the outer peripheral surface of the first body 62. Along the first direction X, the first spring 7 is abutted and installed between the fourth sub-cavity 232 and the fourth stepped surface 64.

[0065] Specifically, the second valve chamber 23 is composed of a third sub-chamber 231 and a fourth sub-chamber 232. The third sub-chamber 231 and the fourth sub-chamber 232 are connected. Both the third sub-chamber 231 and the fourth sub-chamber 232 extend along the first direction X. The third sub-chamber 231 is located to the left of the fourth sub-chamber 232. The inner diameter of the third sub-chamber 231 is smaller than the inner diameter of the fourth sub-chamber 232, so that the fourth sub-chamber 232 is formed at the connection between the third sub-chamber 231 and the fourth sub-chamber 232.

[0066] The first valve seat 6 consists of a first body 62 and a second body 63 connected to each other, wherein both the first body 62 and the second body 63 extend along a first direction X, and the first body 62 is located to the right of the second body 63. Further, at least a portion of the first body 62 and the second body 63 are disposed in the second valve cavity 23, and the outer diameter of the first body 62 is smaller than the outer diameter of the second body 63, so as to form a fourth stepped surface 64 at the connection between the first body 62 and the second body 63. Thus, the fourth sub-cavity 232 and the fourth stepped surface 64 are disposed opposite to each other and spaced apart along the first direction X.

[0067] The first spring 7 is disposed in the second valve cavity 23 and sleeved on the outer peripheral surface of the first body 62. Along the first direction X, the first spring 7 is abutted between the fourth sub-cavity 232 and the fourth stepped surface 64. This arrangement allows the first spring 7 to be stably abutted between the first valve core 2 and the first valve seat 6, satisfying the reset requirement of the first valve core 2. At the same time, the structure of the fourth sub-cavity 232 and the fourth stepped surface 64 is relatively simple and easy to process, which helps to save costs.

[0068] In some embodiments of this application, such as Figure 1 and Figure 2As shown, the valve body 1 also has a second outlet 14. Along the first direction X, the second outlet 14 is further away from the first sub-cavity 111 than the first outlet 13. The flow valve 100 also includes a second valve seat 3. Along the first direction X, the second valve seat 3 is located on the side of the first valve seat 6 away from the first sub-cavity 111 and abuts against the first valve seat 6. Part of the second valve seat 3 is fixedly installed in the second sub-cavity 112. Part of the first valve core 2 is sleeved on the outer peripheral surface of the second valve seat 3, so that the second valve seat 3, the valve body 1, and the first valve core 2 together form a flow guiding channel 4. The second valve seat 3 has a third outlet 31. The third outlet 31 is connected to the second outlet 14 through the flow guide channel 4. The flow valve 100 also includes a second valve core 5. At least a portion of the second valve core 5 is disposed in the second valve seat 3 along the first direction X. The second valve core 5 has a second flow channel 51 and a fourth outlet 52. The first valve seat 6 has a first flow channel 61. The second flow channel 51 is connected to the fourth outlet 52, and the second flow channel 51 is connected to the first sub-cavity 111 through the first flow channel 61. The second valve core 5 is movable relative to the second valve seat 3 along the first direction X so that the fourth outlet 52 can selectively connect with the third outlet 31.

[0069] Specifically, such as Figure 1 and Figure 2 As shown, the second outlet 14 of the valve body 1 is located on the side of the valve body 1 and along the first direction X. The second outlet 14 is located to the left of the first outlet 13. The second valve seat 3 is located to the left of the first valve seat 6 and abuts against the first valve seat 6. The second valve seat 3 is fixedly connected to the valve body 1. Thus, combined with the first spring 7 being abutted and installed between the first valve core 2 and the first valve seat 6, the first valve seat 6 is abutted and fixed inside the first valve core 2.

[0070] Furthermore, a portion of the second valve seat 3 is disposed in the second sub-cavity 112, and a portion of the first valve core 2 is sleeved on the outer peripheral surface of the second valve seat 3. With this arrangement, the outer peripheral surface of the second valve seat 3, the inner wall of the valve body 1, and the second end face 22 of the first valve core 2 together form a flow guiding channel 4. (Continuing to refer to...) Figure 2 As shown, the second valve seat 3 also has a third liquid outlet 31, which is disposed on the side wall of the second valve seat 3 and is connected to the second liquid outlet 14 through the flow guide channel 4.

[0071] Furthermore, along the first direction X, at least a portion of the second valve core 5 passes through the second valve seat 3. It is understood that the second valve seat 3 is provided with a third valve cavity 33. The second valve core 5 can be completely disposed in the third valve cavity 33 or partially disposed in the third valve cavity 33. The second valve core 5 has a second flow channel 51 and a fourth liquid outlet 52. The fourth liquid outlet 52 is disposed on the side wall of the second valve core 5 and communicates with the second flow channel 51. Furthermore, the first valve seat 6 has a first flow channel 61, and the second flow channel 51 communicates with the first sub-cavity 111 through the first flow channel 61 and the third valve cavity 33.

[0072] The second valve core 5 is movable along the first direction X so that the fourth outlet 52 can selectively communicate with the third outlet 31. It can be understood that as the second valve core 5 moves left and right along the first direction X in the third valve chamber 33, the fourth outlet 52 can communicate with the third outlet 31 or be disconnected from the third outlet 31. When the fourth outlet 52 is connected to the third outlet 31, the fluid flowing into the inlet 12 of the valve body 1 can flow sequentially through the first sub-chamber 111, the first flow channel 61, the third valve chamber 33, the second flow channel 51, the fourth outlet 52, the third outlet 31, and the guide channel 4 before flowing out from the second outlet 14. When the fourth outlet 52 is disconnected from the third outlet 31, the fluid flowing into the inlet 12 cannot flow out from the second outlet 14.

[0073] To enable those skilled in the art to better understand this solution, as a specific example, when fluid flows into the first sub-cavity 111 through the inlet 12, the fluid in the first sub-cavity 111 exerts a thrust on the first end face 21 of the first valve core 2. Assuming the thrust on the first end face 21 is F1, if the thrust F1 on the first end face 21 is greater than the elastic force of the first spring 7, the first valve core 2 moves to the left under the drive of the fluid and compresses the first spring 7. At the same time, the first valve core 2 opens the first outlet 13. When the second valve core 5 moves along the first direction X to connect the fourth outlet 52 with the third outlet 31, some fluid can pass through the second outlet 13. 4. When liquid flows out of the second outlet 14, the fluid in the guide channel 4 can apply hydraulic pressure F2 to the second end face 22 of the first valve core 2. Due to the pressure difference generated by the hydraulic oil flow, the inlet pressure is greater than the outlet pressure, so F1 > F2. The first spring 7 will be compressed under the action of the pressure on both sides. Assuming that the elastic force of the first spring 7 is ΔP, at this time, the formula F1-F2 = ΔP can be approximately formed. The first valve core 2 reaches a new equilibrium. During this process, the position of the second valve core 5 remains unchanged. The first valve core 2 keeps the pressure difference balanced. Therefore, the flow rate of the second outlet 14 remains basically stable and is not affected by the fluctuation of its downstream load.

[0074] Therefore, the first outlet 13 serves as a bypass outlet, and the second outlet 14 serves as a proportional outlet, which can realize the proportional regulation of the flow valve 100 and pressure compensation. It is suitable for applications requiring pressure compensation, has a wide range of applications, and is highly versatile.

[0075] In some embodiments of this application, such as Figure 1 As shown, the flow valve 100 also includes an electromagnetic drive assembly 8, which is installed on the valve body 1. The electromagnetic drive assembly 8 is used to drive the second valve core 5 to move in the second valve seat 3 along the first direction X, so that the fourth outlet 52 can selectively communicate with the third outlet 31.

[0076] Specifically, the movement of the second valve core 5 within the second valve seat 3 can be controlled by controlling the on / off state of the electromagnetic drive component 8. For example, assuming that when the electromagnetic drive component 8 is de-energized, the second valve core 5 is in its initial state, at which time the fourth outlet 52 is disconnected from the third outlet 31. When the electromagnetic drive component 8 is energized, it drives the second valve core 5 to move along the first direction X within the second valve seat 3, so that the fourth outlet 52 and the third outlet 31 are connected. It can be understood that when the electromagnetic drive component 8 is energized, the conduction area between the fourth outlet 52 and the third outlet 31 can be controlled by controlling the magnitude of the current. Here, the "conduction area" refers to the interception area through which the fluid can pass when the fourth outlet 52 and the third outlet 31 are opposite or partially opposite.

[0077] The intercepting area is determined by the relative position of the fourth outlet 52 and the third outlet 31. For example, when the current controlling the electromagnetic drive component 8 is A1, the fourth outlet 52 and the third outlet 31 are directly opposite each other, and the intercepting area is the largest, so the fluid output flow rate is the largest. When the current controlling the electromagnetic drive component 8 is greater than or less than A1, the fourth outlet 52 and the third outlet 31 are partially offset, and the intercepting area decreases, so the fluid output flow rate decreases.

[0078] With this setup, the flow rate of the second outlet 14 is adjusted by controlling the current in the electromagnetic drive component 8, and the adjustment method is simple and reliable.

[0079] When the second valve core 5 needs to move in the reverse direction, a reverse current can be applied to the electromagnetic drive assembly 8, which will not be elaborated here.

[0080] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the electromagnetic drive assembly 8 includes a magnetic sleeve 81 and a magnetic element 82. The magnetic sleeve 81 is fixedly connected to the valve body 1. Along the first direction X, the magnetic element 82 is movably disposed inside the magnetic sleeve 81. The magnetic element 82 is connected to the second valve core 5 through a push rod 83.

[0081] Specifically, the magnetic sleeve 81 is fitted onto the outer circumferential surface of the valve body 1 and fixed to the valve body 1. The magnetic element 82 is disposed inside the magnetic sleeve 81 and moves left and right within the magnetic sleeve 81 along the first direction X. The outer circumferential surface of the magnetic sleeve 81 is provided with a coil. For example, when a positive current is applied to the coil, the electromagnetic force generated by the coil and the magnetic sleeve 81 pushes the magnetic element 82 to move to the right. When a reverse current is applied to the coil, the electromagnetic force generated by the coil and the magnetic sleeve 81 pushes the magnetic element 82 to move to the left.

[0082] Continue to refer to Figure 1 As shown, a push rod 83 is also provided inside the magnetic sleeve 81. Along the first direction X, one end of the push rod 83 is fixedly connected to the magnetic component 82, and the other end is fixedly connected to the second valve core 5. In this way, by applying current through the coil, the second valve core 5 can be driven to move left and right along the first direction X. The adjustment structure is simple and reliable.

[0083] Furthermore, along the first direction X, a third limiting member 85 is provided at the end of the magnetic component 82 away from the push rod 83. The third limiting member 85 is used to limit the stroke of the magnetic component 82 to the left. The third limiting member 85 is fixedly installed in the magnetic sleeve 81 by a locking cap 84.

[0084] In some embodiments of this application, such as Figure 1 As shown, the magnetic sleeve 81 and the valve body 1 form a receiving space 9, such as... Figure 2 As shown, along the first direction X, the second valve core 5 includes a third body 53 and a fourth body 54 connected in sequence. The third body 53 passes through the second valve seat 3 and can move left and right along the first direction X of the second valve seat 3. The third body 53 has a second flow channel 51 and a fourth liquid outlet 52. Part of the fourth body 54 is located in the accommodating space 9 and is fixedly connected to the push rod 83. This facilitates the connection and fixation of the second valve core 5 and the push rod 83, which helps to improve assembly efficiency.

[0085] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the flow valve 100 also includes a first limiting member 10, a second limiting member 20, and a second spring 30. Along the first direction X, the first limiting member 10 and the second limiting member 20 are spaced apart. The first limiting member 10 is further away from the second valve seat 3 than the second limiting member 20. The first limiting member 10 and the second limiting member 20 are both sleeved on the fourth body 54. The first limiting member 10 is fixedly connected to the fourth body 54. Along the first direction X, the second limiting member 20 abuts against the second valve seat 3. The second spring 30 is abutted and installed between the first limiting member 10 and the second limiting member 20.

[0086] Specifically, along the first direction X, the first limiting member 10 is disposed to the left of the second limiting member 20 and spaced apart. The first limiting member 10 is sleeved on the fourth body 54 and fixedly connected to the fourth body 54. The second limiting member is sleeved on the fourth body 54 and abuts against the second valve seat 3. The second spring 30 is abutted and installed between the first limiting member 10 and the second limiting member 20.

[0087] like Figure 1 and Figure 2 As shown, when the coil is not energized, the second spring 30 pushes the second valve core 5 to the left limit position, and the magnetic component 82 is also in the left limit position. At this time, the fourth outlet 52 and the third outlet 31 are not connected. When the coil is energized, under the action of electromagnetic force, the magnetic component 82 is driven to move to the right. The magnetic component 82 pushes the push rod 83, which in turn pushes the second valve core 5 to move to the right against the elastic force of the second spring 30. As the second valve core 5 moves to the right, the conductive area between the fourth outlet 52 on the second valve core 5 and the third outlet 31 on the second valve seat 3 gradually decreases until it is fully open. When the coil is de-energized, the second valve core 5 returns to the left limit position under the drive of the second spring 30. Thus, the automatic reset of the second valve core 5 is achieved by the second spring 30. The mechanism is simple and reliable, and saves reset energy.

[0088] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the flow valve 100 also includes a seal 40. The second valve seat 3 is provided with a sealing groove 32 along the first direction X. The sealing groove 32 is located on the side of the third outlet 31 away from the inlet 12. The seal 40 is located between the sealing groove 32 and the inner wall of the second sub-cavity 112. This arrangement reduces the risk of fluid leakage from the gap between the second valve seat 3 and the second sub-cavity 112, thus improving the sealing performance of the flow valve 100.

[0089] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0090] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0091] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0092] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A flow valve characterized by, include: A valve body (1) has a first valve cavity (11) along a first direction (X). The first valve cavity (11) includes a first sub-cavity (111) and a second sub-cavity (112) connected in sequence. The inner diameter of the first sub-cavity (111) is smaller than the inner diameter of the second sub-cavity (112) to form a first stepped surface (113). The valve body (1) has a liquid inlet (12) and a first liquid outlet (13). The liquid inlet (12) is connected to the first sub-cavity (111), and the first liquid outlet (13) is connected to the second sub-cavity (112). The first direction (X) is parallel to the axial direction of the valve body (1). The first valve core (2) is movably disposed in the second sub-cavity (112) along the first direction (X) to block or open the first liquid outlet (13); Along the first direction (X), the first valve core (2) has a first end face (21) and a second end face (22) disposed opposite to each other. The first end face (21) is closer to the first sub-cavity (111) than the second end face (22). The first end face (21) can selectively abut against the first stepped surface (113).

2. The flow valve of claim 1, wherein, Along the first direction (X), the second sub-cavity (112) includes a first segment (1121) and a second segment (1122) connected in sequence. The first segment (1121) is closer to the first sub-cavity (111) than the second segment (1122), and the first segment (1121) is connected to the first sub-cavity (111). The inner diameter of the first segment (1121) is larger than the inner diameter of the second segment (1122) to form a second step surface (1123).

3. The flow valve of claim 1, wherein, The flow valve (100) further includes a first valve seat (6) and a first spring (7). At least a portion of the first valve seat (6) is fixedly installed inside the first valve core (2). The first spring (7) is disposed inside the first valve core (2) and sleeved on the outer peripheral surface of the first valve seat (6). Along the first direction (X), the first spring (7) is abutted between the first valve core (2) and the first valve seat (6) so that the first end face (21) abuts against the first step surface (113). Along the first direction (X), the projection of the first sub-cavity (111) overlaps with the projection of the first end face (21).

4. The flow valve of claim 3, wherein, The first valve core (2) has a second valve cavity (23) along the first direction (X). The second valve cavity (23) includes a third sub-cavity (231) and a fourth sub-cavity (232) connected in sequence. The inner diameter of the third sub-cavity (231) is smaller than the inner diameter of the fourth sub-cavity (232) to form a third stepped surface (233). Along the first direction (X), the first valve seat (6) includes a first body (62) and a second body (63) connected in sequence. At least a portion of the first body (62) and the second body (63) are both disposed in the second valve cavity (23). The outer diameter of the first body (62) is smaller than the outer diameter of the second body (63) to form a fourth stepped surface (64). The first spring (7) is disposed in the second valve cavity (23) and sleeved on the outer peripheral surface of the first body (62). Along the first direction (X), the first spring (7) is abutted between the third step surface (233) and the fourth step surface (64).

5. The flow valve of claim 3, wherein, The valve body (1) also has a second liquid outlet (14), which is further away from the first sub-cavity (111) along the first direction (X). The flow valve (100) further includes a second valve seat (3). Along the first direction (X), the second valve seat (3) is located on the side of the first valve seat (6) away from the first sub-cavity (111) and abuts against the first valve seat (6). A portion of the second valve seat (3) is fixedly installed in the second sub-cavity (112). A portion of the first valve core (2) is sleeved on the outer peripheral surface of the second valve seat (3) so that the second valve seat (3), the valve body (1), and the first valve core (2) together form a flow guiding channel (4). The second valve seat (3) has a third liquid outlet (31). The third liquid outlet (31) is connected to the second liquid outlet (14) through the flow guiding channel (4). The flow valve (100) further includes a second valve core (5), at least a portion of which passes through the second valve seat (3) along the first direction (X). The second valve core (5) has a second flow channel (51) and a fourth outlet (52). The first valve seat (6) has a first flow channel (61). The second flow channel (51) communicates with the fourth outlet (52), and the second flow channel (51) communicates with the first sub-cavity (111) through the first flow channel (61). The second valve core (5) is movable relative to the second valve seat (3) along the first direction (X) so that the fourth outlet (52) selectively communicates with the third outlet (31).

6. The flow valve of claim 5, wherein, The flow valve (100) further includes an electromagnetic drive assembly (8), which is installed on the valve body (1). The electromagnetic drive assembly (8) is used to drive the second valve core (5) to move in the second valve seat (3) along the first direction (X) so that the fourth outlet (52) can selectively communicate with the third outlet (31).

7. The flow valve of claim 6, wherein, The electromagnetic drive assembly (8) includes a magnetic sleeve (81) and a magnetic component (82). The magnetic sleeve (81) is fixedly connected to the valve body (1). Along the first direction (X), the magnetic component (82) is movably disposed inside the magnetic sleeve (81). The magnetic component (82) is connected to the second valve core (5) through a push rod (83).

8. The flow valve of claim 7, wherein, The magnetic sleeve (81) and the valve body (1) form a receiving space (9). Along the first direction (X), the second valve core (5) includes a third body (53) and a fourth body (54) connected in sequence. The third body (53) passes through the second valve seat (3). The third body (53) has the second flow channel (51) and the fourth liquid outlet (52). A portion of the fourth body (54) is disposed in the receiving space (9) and is fixedly connected to the push rod (83).

9. The flow valve of claim 8, wherein, The flow valve (100) further includes a first limiting member (10), a second limiting member (20), and a second spring (30). Along the first direction (X), the first limiting member (10) and the second limiting member (20) are spaced apart. The first limiting member (10) is further away from the second valve seat (3) than the second limiting member (20). The first limiting member (10) and the second limiting member (20) are both sleeved on the fourth body (54). The first limiting member (10) is fixedly connected to the fourth body (54). Along the first direction (X), the second limiting member (20) abuts against the second valve seat (3). The second spring (30) is abutted between the first limiting member (10) and the second limiting member (20).

10. The flow valve of claim 5, wherein, The flow valve (100) further includes a sealing element (40), and the second valve seat (3) is provided with a sealing groove (32). Along the first direction (X), the sealing groove (32) is located on the side of the third outlet (31) away from the inlet (12), and the sealing element (40) is located between the sealing groove (32) and the inner wall of the second sub-cavity (112).

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