Three-way digital valve

Abstract

The application provides a three-way digital valve, which comprises a pilot valve, a main valve, a first connecting piece and a second connecting piece. The pilot valve has a first valve cavity, and comprises a first valve core which is inserted on the pilot valve and is movable along an axis of the first valve core. The main valve has a second valve cavity, and comprises a second valve core which is inserted on the main valve and is movable along an axis of the second valve core. The first connecting piece comprises a first connecting part and a first matching part, and the second connecting piece comprises a second connecting part and a second matching part. The first connecting part is connected with the first valve core, the second connecting part is connected with the second valve core, and the first matching part is connected with the second matching part. The three-way digital valve has the advantages of high control precision and fast response speed.

Description

Technical Field

[0001] This invention relates to the field of hydraulic technology, and more specifically, to a three-way digital valve. Background Technology

[0002] With the promotion of electronic information technology in the field of hydraulic transmission, the problems of traditional hydraulic control systems, such as sensitivity to pollution, low efficiency, and susceptibility to interference, have become increasingly prominent. Digital hydraulic technology has shown strong advantages in terms of response speed, anti-interference, energy saving, fault tolerance, and versatility. In particular, the control form of digital signals is simpler and meets the requirements of information interfaces such as computers and the Internet. It can reduce the accuracy loss, time delay, and cost increase caused by A / D and D / A conversion. Therefore, digital hydraulics in the modern sense has received widespread attention since its introduction and is known as the future hydraulic technology.

[0003] Digital valves use stepper motors or servo motors controlled by digital signals as electromechanical conversion elements. They rely on a lead screw structure to convert the rotation angle of the motor into the linear opening of the valve core. These valves have advantages such as high repeatability, no hysteresis, and no need for D / A conversion and linear amplifiers, which are more conducive to the digital control and intelligent development of hydraulic systems.

[0004] In related technologies, sensors are generally used to detect the position of the valve core and provide position feedback. Electro-hydraulic feedback is used to control the energization of a proportional electromagnet to control the force output of the valve core. However, this electro-hydraulic feedback method has a certain signal delay, which reduces the control accuracy of the valve core. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, embodiments of the present invention propose a three-way digital valve, which has the advantages of high control accuracy and fast response speed.

[0007] The three-way digital valve of this invention includes: a pilot valve, the pilot valve having a first valve chamber, the pilot valve including a first valve core, the first valve core being inserted into the pilot valve, and the first valve core being movable along the axis of the first valve core;

[0008] A main valve having a second valve chamber, the main valve including a second valve core, the second valve core being inserted into the main valve, the second valve core being movable along the axis of the second valve core;

[0009] A first connector and a second connector, wherein the first connector includes a first connecting portion and a first mating portion, and the second connector includes a second connecting portion and a second mating portion, wherein the first connecting portion is connected to the first valve core, the second connecting portion is connected to the second valve core, and the first mating portion is connected to the second mating portion, so that one of the first connector and the second connector rotates, thereby driving the other of the first connector and the second connector to rotate.

[0010] In this embodiment of the invention, the pilot valve of the three-way digital valve opens, the first valve core moves and uses the pressure difference to drive the second valve core to move, thereby driving the second connecting member connected to the second valve core to rotate, and driving the first connecting member to rotate, so that the first valve core moves in the opposite direction to its movement, which is beneficial for the three-way digital valve of this embodiment of the invention to respond promptly when used again.

[0011] Furthermore, the first valve core of the three-way digital valve in this embodiment of the invention can also be driven by a motor to improve the control accuracy of the three-way digital valve in this embodiment of the invention.

[0012] Therefore, the three-way digital valve of the present invention has the advantages of fast response speed and high control accuracy.

[0013] In some embodiments, the first valve chamber includes a first high-pressure chamber, a first chamber, a low-pressure chamber, a second chamber, and a second high-pressure chamber arranged sequentially; the second valve chamber includes a third chamber, a third high-pressure chamber, and a fourth chamber arranged sequentially; the main valve further includes a high-pressure port, a low-pressure port, an inlet / outlet port, and an external control port; the first high-pressure chamber, the second high-pressure chamber, and the third high-pressure chamber are all connected to the high-pressure port; the low-pressure port is connected to the low-pressure chamber; the first chamber is connected to the third chamber; and the second chamber is connected to the fourth chamber.

[0014] The three-way digital valve further includes a first cone valve core to a fourth cone valve core. The first cone valve core and the second cone valve core are sleeved on the first valve core and are movable along the axis of the first cone valve core. The third cone valve core is disposed on the second valve core and is used to block and open the high-pressure gasoline port and the inlet and outlet ports. The fourth cone valve core is sleeved on the second valve core and is used to block and open the low-pressure oil port, the inlet and outlet ports, and the external control port.

[0015] In some embodiments, the three-way digital valve has a first state and a second state. In the first state, the second cone valve core connects the second high-pressure chamber and the second chamber, so that the liquid in the second high-pressure chamber flows into the fourth chamber through the second chamber, and the low-pressure chamber is connected to the first chamber. The liquid in the low-pressure chamber flows into the third chamber through the first chamber, so that the second valve core moves in a first direction.

[0016] In the second state, the first cone valve core connects the first high-pressure chamber and the first chamber, so that the liquid in the first high-pressure chamber flows into the third chamber sequentially through the first chamber, and the low-pressure chamber is connected to the second chamber, so that the liquid in the low-pressure chamber flows into the fourth chamber through the second chamber, so that the second valve core moves in the second direction, the first direction being opposite to the second direction.

[0017] In some embodiments, the system further includes a first valve seat and a second valve seat, both of which have cavities. The first valve seat is located within the first high-pressure chamber, and the cavity of the first valve seat communicates with the first high-pressure chamber. The first cone valve core is disposed within the cavity of the first valve seat and is used to connect and block the cavity of the first valve seat and the first chamber.

[0018] The second valve seat is located inside the second high-pressure chamber, and the cavity of the second valve seat is connected to the second high-pressure chamber. The second cone valve core is located inside the cavity of the second valve seat and is used to connect and disconnect the cavity of the second valve seat and the second chamber.

[0019] In some embodiments, the valve seat further includes a first elastic member and a second elastic member. The first valve seat further includes a first opening. The first opening is located on the side of the first valve seat adjacent to the first cavity. The first opening communicates the cavity of the first valve seat and the first cavity. The first elastic member is connected between the bottom wall of the cavity of the first valve seat and the first cone valve core, so that the first cone valve core blocks the first opening.

[0020] The second valve seat further includes a second opening, which is located on the side of the second valve seat adjacent to the second cavity. The second opening connects the cavity of the second valve seat and the second cavity. The second elastic element is connected between the bottom wall of the cavity of the second valve seat and the second cone valve core, so that the second cone valve core blocks the second opening.

[0021] In some embodiments, the first cone valve core has a first peripheral wall surface and a first side surface and a second side surface that are axially opposite to each other along the first valve core. The first peripheral wall surface contacts the peripheral wall surface of the cavity of the first valve seat. The first cone valve core further includes at least one first connecting hole that penetrates the first side surface and the second side surface.

[0022] The second cone valve core has a second peripheral wall surface and a third side surface and a fourth side surface that are axially opposite to the first valve core. The second peripheral wall surface contacts the peripheral wall surface of the cavity of the second valve seat. The second cone valve core also includes at least one second connecting hole that penetrates the third side surface and the fourth side surface.

[0023] In some embodiments, the first valve core further includes a first protrusion and a second protrusion, the first protrusion being located within the first cavity and disposed adjacent to the first cone valve core, and the second protrusion being located within the second cavity and disposed adjacent to the second cone valve core.

[0024] In the first state, the second protrusion abuts against the second cone valve core, so that the second cone valve core connects the cavity of the second valve seat and the second cavity.

[0025] In the second state, the first protrusion abuts against the first cone valve core, so that the first cone valve core connects the cavity of the first valve seat and the first cavity.

[0026] In some embodiments, the valve core further includes a first guide member and a second guide member. The first guide member is disposed in the first valve cavity, and the first valve core is provided with a first guide portion that matches the first guide member. The second guide member is disposed in the second valve cavity, and the second valve core is provided with a second guide portion that matches the second guide member.

[0027] In some embodiments, a drive member is further included, the drive member including a drive portion connected to the first valve core to drive the first valve core to rotate.

[0028] In some embodiments, a third elastic element is further included, the second valve cavity includes a first mounting surface, the fourth cone valve core includes a second mounting surface, the first mounting surface and the second mounting surface are arranged axially spaced along the second valve core, and the elastic element is connected between the first mounting surface and the second mounting surface. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a three-way digital valve according to an embodiment of the present invention.

[0030] Figure 2 yes Figure 1 An enlarged schematic diagram of A shown in the figure.

[0031] Figure 3 This is a schematic diagram of the three-way digital valve in the first state according to an embodiment of the present invention.

[0032] Figure label:

[0033] Pilot valve 10;

[0034] First valve chamber 101; First high-pressure chamber 1011; First chamber 1012; Low-pressure chamber 1013; Second chamber 1014; Second high-pressure chamber 1015;

[0035] First valve core 102; First cone valve core 103; First peripheral wall 1031; First side 1032; Second side 1033; First connecting hole 1034; Second cone valve core 104; Second peripheral wall 1041; Third side 1042; Fourth side 1043; Second connecting hole 1044; First protrusion 105; Second protrusion 106;

[0036] First valve seat 107; Second valve seat 108;

[0037] First elastic element 1090; Second elastic element 1091;

[0038] First guide section 1010;

[0039] Main valve 20; High-pressure oil port 2001; Low-pressure oil port 2002; Inlet / outlet oil port 2003; External control port 2004;

[0040] Second valve chamber 201; Third chamber 2011; Third high-pressure chamber 2012; Fourth chamber 2013;

[0041] Second valve core 202; Third cone valve core 2021; Fourth cone valve core 2022; Second mounting surface 2023; Third protrusion 2024; Fourth protrusion 2025;

[0042] First mounting surface 203;

[0043] Second guide section 204;

[0044] Third elastic element 205;

[0045] First connector 30; First connecting part 301; First mating part 302;

[0046] Second connector 31; second connecting part 311; second mating part 312;

[0047] First guide component 41; Second guide component 42;

[0048] Drive component 5; drive unit 51. Detailed Implementation

[0049] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0050] like Figures 1-3 As shown, the three-way digital valve of this embodiment includes: a pilot valve 10, a main valve 20, a first connector 30, and a second connector 31.

[0051] Pilot valve 10 has a first valve chamber 101 and includes a first valve core 102, which is inserted into the pilot valve 10 and is movable along its axis. Main valve 20 has a second valve chamber 201 and includes a second valve core 202, which is inserted into the main valve 20 and is movable along its axis.

[0052] Specifically, such as Figure 1 and Figure 2 As shown, the first valve core 102 extends in the left-right direction and is inserted into the second valve core 202 in the left-right direction. The second valve cavity 201 extends in the left-right direction, and the second valve core 202 is inserted into the second valve core 202 in the left-right direction, with the left end of the second valve core 202 located inside the second valve cavity 201.

[0053] The first connector 30 includes a first connecting portion 301 and a first mating portion 302, and the second connector 31 includes a second connecting portion 311 and a second mating portion 312. The first connecting portion 301 is connected to the first valve core 102, the second connecting portion 311 is connected to the second valve core 202, and the first mating portion 302 is connected to the second mating portion 312, so that one of the first connector 30 and the second connector 31 rotates, thereby driving the other of the first connector 30 and the second connector 31 to rotate.

[0054] It is understandable that, such as Figure 1 and Figure 2 As shown, the first connecting part 301 and the second end of the first valve core 102 can be connected by threads, that is, one of the first connecting part 301 and the first valve core 102 has internal threads, and the other of the first connecting part 301 and the first valve core 102 has external threads. The second connecting part 311 is connected to the second end of the second valve core 202 through a nut and screw pair. The first mating part 302 and the second mating part 312 can be a gear set that meshes with each other, and the gears in the gear set have the same specifications.

[0055] In other words, when the first valve core 102 is rotated, since the first valve core 102 is threadedly connected to the first connecting part 301, the first valve core 102 moves simultaneously in the left-right direction. For example, when the first valve core 102 moves from its initial position in the right-to-left direction, the hydraulic differential in the second valve chamber 201 drives the second valve core 202 to move. Since the second valve core 202 is connected to the second connecting part 311 through a nut and screw pair, it can drive the second connecting part 311 to rotate, and drive the second mating part 312 to rotate. Then, by utilizing the threaded engagement between the first connecting part 301 and the first valve core 102, the first valve core 102 moves from left to right and gradually moves back to its initial position. This allows the first valve core 102 to respond quickly to the next movement command, improving the response speed of the three-way digital valve in this embodiment of the invention.

[0056] In other words, when the pilot valve 10 of the three-way digital valve in this embodiment of the invention is opened, the first valve core 102 moves and uses the pressure difference to drive the second valve core 202 to move, thereby driving the second connecting member 31 connected to the second valve core 202 to rotate, and driving the first connecting member 30 to rotate, so that the first valve core 102 moves in the opposite direction to its movement, which is beneficial for the three-way digital valve in this embodiment of the invention to respond promptly when used again.

[0057] Furthermore, the first valve core 102 of the three-way digital valve in this embodiment of the invention can also be driven by a motor to improve the control accuracy of the three-way digital valve in this embodiment of the invention.

[0058] Therefore, the three-way digital valve of the present invention has the advantages of fast response speed and high control accuracy.

[0059] In some embodiments, the first valve chamber 101 includes a first high-pressure chamber 1011, a first chamber 1012, a low-pressure chamber 1013, a second chamber 1014, and a second high-pressure chamber 1015 arranged sequentially. The second valve chamber 201 includes a third chamber 2011, a third high-pressure chamber 2012, and a fourth chamber 2013 arranged sequentially. The main valve 20 also includes a high-pressure oil port 2001, a low-pressure oil port 2002, an inlet / outlet oil port 2003, and an external control port 2004. The first high-pressure chamber 1011, the second high-pressure chamber 1015, and the third high-pressure chamber 2012 are all connected to the high-pressure oil port 2001. The low-pressure oil port 2002 is connected to the low-pressure chamber 1013. The first chamber 1012 is connected to the third chamber 2011. The second chamber 1014 is connected to the fourth chamber 2013.

[0060] like Figure 1 and Figure 2As shown, the second valve core 202 also includes a third protrusion 2024 and a fourth protrusion 2025. The third protrusion 2024 and the fourth protrusion 2025 are arranged opposite each other along the axial direction of the second valve core 202. The third protrusion 2024 can block the third chamber 2011 and the third high-pressure chamber 2012, and the fourth protrusion 2025 can block the fourth chamber 2013 and the external control port 2004. That is to say, the high-pressure liquid and the low-pressure liquid flowing into the second valve chamber 201 can act on the third protrusion 2024 and the fourth protrusion 2025 respectively to drive the second valve core 202 to move.

[0061] The high-pressure port 2001 is used to introduce high-pressure oil, and the low-pressure port 2002 is used to introduce low-pressure oil. It should be noted that the pressure of the high-pressure fluid is greater than 16 MPa, and the pressure of the low-pressure fluid is less than 8 MPa.

[0062] The three-way digital valve also includes a first cone valve core 103 to a fourth cone valve core 2022. The first cone valve core 103 and the second cone valve core 104 are sleeved on the first valve core 102 and are movable along the axis of the first cone valve core 103. The third cone valve core 2021 is disposed on the second valve core 202 and is used to block and open the high-pressure gasoline port and the inlet / outlet port 2003. The fourth cone valve core 2022 is sleeved on the second valve core 202 and is used to block and open the low-pressure oil port 2002, the inlet / outlet port 2003, and the external control port 2004.

[0063] Specifically, such as Figure 1 and Figure 2 As shown, in the initial state, the pilot valve 10 and the main valve 20 have the following properties: the first cone valve core 103 can block the first high-pressure chamber 1011 and the first chamber 1012; a portion of the first valve core 102 can block the low-pressure chamber 1013, the first chamber 1012, and the low-pressure chamber 1013 and the second chamber 1014; the second cone valve core 104 can block the second chamber 1014 and the second high-pressure chamber 1015; the third cone valve core 2021 can block the third high-pressure chamber 2012 and the inlet / outlet port 2003; and the fourth cone valve core 2022 can block the low-pressure port 2002 and the inlet / outlet port 2003. High-pressure liquid is introduced into the external control port 2004, driving the fourth cone valve core 2022 to block the inlet / outlet port 2003 and the low-pressure port 2002.

[0064] In some embodiments, the three-way digital valve has a first state and a second state. In the first state, the second cone valve core 104 connects the second high-pressure chamber 1015 and the second chamber 1014, so that the liquid in the second high-pressure chamber 1015 flows into the fourth chamber 2013 through the second chamber 1014, and the low-pressure chamber 1013 is connected to the first chamber 1012. The liquid in the low-pressure chamber 1013 flows into the third chamber 2011 through the first chamber 1012, so that the second valve core 202 moves in the first direction.

[0065] Specifically, such as Figure 3 As shown, the first valve core 102 moves from left to right in its initial position to drive the second cone valve core 104 to move, so that the second cone valve core 104 connects the second high-pressure chamber 1015 and the second chamber 1014. The high-pressure liquid in the second high-pressure chamber 1015 flows into the fourth chamber 2013 through the second chamber 1014, and the low-pressure oil port 2002 is connected to the first chamber 1012 so that the low-pressure liquid flows into the third chamber 2011 through the first chamber 1012.

[0066] It is understandable that, such as Figure 3 As shown, in the first state, the first valve core 102 moves, causing high-pressure liquid and low-pressure liquid to flow into the second valve chamber 201, and a pressure difference is generated on the left and right sides of the second valve core 202. This pressure difference can be used to drive the second valve core 202 to move in the direction from right to left, thereby connecting the third high-pressure chamber 2012 with the oil inlet and outlet ports 2003.

[0067] In the second state, the first cone valve core 103 connects the first high-pressure chamber 1011 and the first chamber 1012, so that the liquid in the first high-pressure chamber 1011 flows into the third chamber 2011 through the first chamber 1012 in sequence, and the low-pressure chamber 1013 is connected to the second chamber 1014, so that the liquid in the low-pressure chamber 1013 flows into the fourth chamber 2013 through the second chamber 1014, so that the second valve core 202 moves in the second direction, which is opposite to the first direction.

[0068] Specifically, such as Figure 1 As shown, the first valve core 102 moves from right to left in the initial position to drive the first cone valve core 103 to move and connect the first high-pressure chamber 1011 and the first chamber 1012. The high-pressure liquid in the first high-pressure chamber 1011 flows into the third chamber 2011 through the first chamber 1012, and the low-pressure oil port 2002 is connected to the second chamber 1014 so that the low-pressure liquid flows into the fourth chamber 2013 through the second chamber 1014.

[0069] Understandably, in the second state, the first valve core 102 moves, allowing high-pressure and low-pressure liquids to flow into the second valve chamber 201. A pressure difference is created on the left and right sides of the left and right valve cores. This pressure difference drives the second valve core 202 to move from right to left, thereby connecting the low-pressure port 2002 with the inlet / outlet port 2003. It should be noted that in the second state, the external control port 2004 is open, allowing the fourth cone valve core 2022 to connect the low-pressure port 2002 with the inlet / outlet port 2003.

[0070] Furthermore, for example, in the first state, when the second valve core 202 moves, the first valve core 102 can be driven to move from right to left via the first connector 30 and the second connector 31 until the first valve core 102 moves to its initial position, thereby enabling the three-way digital valve of this embodiment to respond promptly upon reuse. Similarly, in the second state, after the second valve core 202 moves, the first valve core 102 can also move from left to right until it moves to its initial position.

[0071] In some embodiments, the three-way digital valve of the present invention further includes a first valve seat 107 and a second valve seat 108. Both the first valve seat 107 and the second valve seat 108 have cavities. The first valve seat 107 is located within a first high-pressure chamber 1011, and the cavity of the first valve seat 107 communicates with the first high-pressure chamber 1011. A first cone valve core 103 is disposed within the cavity of the first valve seat 107 and is used to connect and disconnect the cavity of the first valve seat 107 and the first chamber 1012. Specifically, as shown... Figure 1 and Figure 2 As shown, the first valve seat 107 is located in the first high-pressure chamber 1011 and the first cone valve core 103 is located in the first valve seat 107. The left end of the first valve core 102 passes through the first valve seat 107 and the first cone valve core 103 in a direction from right to left, thereby facilitating the installation of the first cone valve core 103.

[0072] The second valve seat 108 is located within the second high-pressure chamber 1015, and the cavity of the second valve seat 108 communicates with the second high-pressure chamber 1015. The second cone valve core 104 is disposed within the cavity of the second valve seat 108 and is used to open and close the cavity of the second valve seat 108 and the second chamber 1014. Specifically, as shown... Figure 1 and Figure 2 As shown, the second valve seat 108 is located inside the second high-pressure chamber 1015 and the second cone valve core 104 is located inside the second valve seat 108. The left end of the first valve core 102 passes through the second valve seat 108 and the second cone valve core 104 in a direction from right to left, thereby facilitating the installation of the second cone valve core 104.

[0073] In some embodiments, the three-way digital valve of the present invention further includes a first elastic element 1090 and a second elastic element 1091. The first valve seat 107 further includes a first opening. The first opening is disposed on the side of the first valve seat 107 adjacent to the first cavity 1012. The first opening connects the cavity of the first valve seat 107 and the first cavity 1012. The first elastic element 1090 is connected between the bottom wall of the cavity of the first valve seat 107 and the first cone valve core 103, so that the first cone valve core 103 blocks the first opening.

[0074] Specifically, such as Figure 1 and Figure 2As shown, the first opening is opened on the right side of the first valve seat 107, the left end of the first elastic member 1090 is connected to the bottom wall of the cavity of the first valve seat 107, and the right end of the first elastic member 1090 is connected to the first cone valve core 103, so that when the pilot-operated water-based digital valve of this embodiment is in the initial state, the first cone valve core 103 blocks the first opening under the action of the elastic force of the first elastic member 1090.

[0075] The second valve seat 108 also includes a second opening, which is located on the side of the second valve seat 108 adjacent to the second cavity 1014. The second opening connects the cavity of the second valve seat 108 and the second cavity 1014. The second elastic member 1091 is connected between the bottom wall of the cavity of the second valve seat 108 and the second cone valve core 104, so that the second cone valve core 104 blocks the second opening. Specifically, as shown... Figure 1 and Figure 2 As shown, the second opening is opened on the left side of the second valve seat 108, the right end of the second elastic member 1091 is connected to the bottom wall of the cavity of the second valve seat 108, and the left end of the second elastic member 1091 is connected to the second cone valve core 104, so that when the pilot-operated water-based digital valve of this embodiment is in the initial state, the second cone valve core 104 blocks the second opening under the action of the elastic force of the second elastic member 1091.

[0076] In some embodiments, the first cone valve core 103 has a first peripheral wall surface 1031 and a first side surface 1032 and a second side surface 1033 that are axially opposite to each other along the first valve core 102. The first peripheral wall surface 1031 contacts the peripheral wall surface of the cavity of the first valve seat 107. The first cone valve core 103 also includes at least one first connecting hole 1034, which penetrates the first side surface 1032 and the second side surface 1033.

[0077] Specifically, such as Figure 1 and Figure 2 As shown, the left side of the first cone valve core 103 is the first side surface 1032, and the right side of the first cone valve core 103 is the second side surface 1033. The axial direction of the first connecting hole 1034 is consistent with the left-right direction. The first peripheral wall surface 1031 slides in contact with the peripheral wall surface of the cavity of the first valve seat 107, that is, the first cone valve core 103 is movable relative to the first valve seat 107, and during the movement, the first peripheral wall surface 1031 contacts the peripheral wall surface of the cavity of the first valve seat 107 to avoid leakage of high-pressure liquid from between the first peripheral wall surface 1031 and the peripheral wall surface of the cavity of the first valve seat 107.

[0078] Understandably, when the first cone valve core 103 connects the cavity of the first valve seat 107 and the first chamber 1012, high-pressure liquid can flow into the first chamber 1012 through the first high-pressure chamber 1011, the cavity of the first valve seat 107, and the first connecting hole 1034, so that the high-pressure liquid can be discharged through the first inlet / outlet port 2003. Preferably, a plurality of first connecting holes 1034 are arranged at intervals along the circumference of the first cone valve core 103 to increase the flow rate of the high-pressure liquid.

[0079] The second cone valve core 104 has a second peripheral wall surface 1041 and a third side surface 1042 and a fourth side surface 1043 that are axially opposite to the first valve core 102. The second peripheral wall surface 1041 contacts the peripheral wall surface of the cavity of the second valve seat 108. The second cone valve core 104 also includes at least one second connecting hole 1044, which penetrates the third side surface 1042 and the fourth side surface 1043.

[0080] Specifically, such as Figure 1 and Figure 2 As shown, the left side of the second cone valve core 104 is the third side surface 1042, and the right side of the second cone valve core 104 is the fourth side surface 1043. The axial direction of the second connecting hole 1044 is consistent with the left-right direction. The second peripheral wall surface 1041 slides in contact with the peripheral wall surface of the cavity of the second valve seat 108, that is, the second cone valve core 104 is movable relative to the second valve seat 108, and during the movement, the second peripheral wall surface 1041 contacts the peripheral wall surface of the cavity of the second valve seat 108 to prevent high-pressure liquid from leaking between the second peripheral wall surface 1041 and the peripheral wall surface of the cavity of the second valve seat 108.

[0081] Understandably, when the second cone valve core 104 connects the cavity of the second valve seat 108 and the second chamber 1014, high-pressure liquid can flow into the second chamber 1014 through the second high-pressure chamber 1015, the cavity of the second valve seat 108, and the second connecting hole 1044, so that the high-pressure liquid can be discharged through the second inlet / outlet port 2003. Preferably, a plurality of second connecting holes 1044 are arranged at intervals along the circumference of the second cone valve core 104 to increase the flow rate of the high-pressure liquid.

[0082] In some embodiments, the first valve core 102 further includes a first protrusion 105 and a second protrusion 106, the first protrusion 105 being located in the first cavity 1012 and adjacent to the first cone valve core 103, and the second protrusion 106 being located in the second cavity 1014 and adjacent to the second cone valve core 104.

[0083] In the first state, such as Figure 3As shown, the second protrusion 106 abuts against the second cone valve core 104, so that the second cone valve core 104 conducts through the cavity and the second chamber 1014 of the second valve seat 108. It can be understood that when the first valve core 102 moves in a direction from right to left, the first protrusion 105 abuts against the second side surface 1033 of the first cone valve core 103, and pushes the first cone valve core 103 to move from right to left against the elastic force of the first elastic member 1090, thereby allowing the first cone valve core 103 to conduct through the cavity and the first chamber 1012 of the first valve seat 107.

[0084] In the second state, the first protrusion 105 abuts against the first cone valve core 103, so that the first cone valve core 103 connects the cavity of the first valve seat 107 and the first chamber 1012. It can be understood that when the first valve core 102 moves from left to right, the second protrusion 106 abuts against the third side 1042 of the second cone valve core 104, and pushes the second cone valve core 104 to move from left to right against the elastic force of the second elastic member 1091, thereby connecting the cavity of the second valve seat 108 and the second chamber 1014.

[0085] In some embodiments, the three-way digital valve of the present invention further includes a first guide member 41 and a second guide member 42. The first guide member 41 is disposed in the first valve cavity 101, and the first valve core 102 is provided with a first guide portion 1010 that matches the first guide member 41. The second guide member 42 is disposed in the second valve cavity 201, and the second valve core 202 is provided with a second guide portion 204 that matches the second guide member 42.

[0086] Specifically, such as Figure 1 and Figure 2 As shown, the first guide member 41 is disposed near the left end of the first valve core 102, and the outer peripheral surface of the first guide member 41 contacts the inner peripheral surface of the first guide portion 1010 to reduce the vibration generated when the first valve core 102 moves and improve the stability of the first valve core 102. Similarly, the outer peripheral surface of the second guide member 42 contacts the inner peripheral surface of the second guide portion 204. Specifically, as... Figure 1 and Figure 2 As shown, the left end of the second valve core 202 forms a second guide member 42.

[0087] It is understood that there can be multiple first guide members 41 and multiple first guide portions 1010, with each of the multiple first guide members 41 corresponding to one of the multiple first guide portions 1010. For example, there may be two first guide members 41, which are respectively located near the left and right ends of the first valve core 102. Preferably, the multiple first guide members 41 are arranged at intervals along the axial direction of the first valve core 102, thereby further improving the stability of the first valve core 102. Similarly, there can be multiple second guide members 42 and multiple second guide portions 204, with each of the multiple second guide members 42 corresponding to one of the multiple second guide portions 204.

[0088] In some embodiments, the three-way digital valve of the present invention further includes a drive member 5, the drive member 5 including a drive part 51, the drive part 51 being connected to the first valve core 102 to drive the first valve core 102 to rotate.

[0089] Specifically, such as Figure 1 and Figure 2 As shown, the driving component 5 can be a motor, and the driving part 51 is the output shaft of the motor. The driving part 51 can be connected to the first valve core 102 through a coupling, and the coupling and the first valve core 102 are connected through a spline, thereby starting the driving component 5 and driving the first valve core 102 to rotate.

[0090] It is understandable that the number of rotations of the driving component 5 can be converted into the displacement of the first valve core 102 through the threaded engagement of the first valve core 102 and the first connecting part 301. That is, the displacement corresponding to one rotation of the first valve core 102 is equal to the pitch (assuming the pitch of the thread on the outer circumferential surface of the first valve core 102 or the inner circumferential surface of the first connecting part 301). In other words, after the first valve core 102 moves a first distance from left to right, it uses the hydraulic differential to drive the second valve core 202 to move. The movement of the second valve core 202 drives the second connecting part 31 and the first connecting part 30 to rotate, and through the threaded connection, the relative rotation between the first connecting part 30 and the first valve core 102 is converted into the first valve core 102 moving from right to left, and the distance moved is the same as the first distance.

[0091] In other words, the three-way digital valve of this embodiment uses a motor drive to convert the rotation of the first valve core 102 into the movement of the second valve core 202, and through the first connector 30 and the second connector 31, the first valve core 102 is restored to its initial position, so that the first valve core 102 can respond in a timely manner in subsequent use.

[0092] In some embodiments, the three-way digital valve of the present invention further includes a third elastic element 205, the second valve chamber 201 includes a first mounting surface 203, the fourth cone valve core 2022 includes a second mounting surface 2023, the first mounting surface 203 and the second mounting surface 2023 are arranged at an axial distance along the second valve core 202, and the elastic element is connected between the first mounting surface 203 and the second mounting surface 2023.

[0093] Specifically, such as Figure 1 and Figure 2 As shown, the first mounting surface 203 is located on the side of the second valve cavity 201 near the fourth cone valve core 2022, and the left end face of the fourth cone valve core 2022 is the second mounting surface 2023. There is a gap between the first mounting surface 203 and the second mounting surface 2023 to facilitate the installation of the third elastic element 205.

[0094] It is understandable that the third elastic element 205 can be a spring, such as... Figure 1 and Figure 2 As shown, the left end of the third elastic element 205 is connected to the first mounting surface 203, and the right end of the third elastic element 205 is connected to the second mounting surface 2023. In the initial state, high-pressure liquid is injected into the external control port 2004, which causes the fourth valve core to move from right to left, i.e., the fourth valve core squeezes the third elastic element 205. When the external control port 2004 is depressurized, the fourth cone valve core 2022 moves from left to right under the elastic force of the third elastic element 205 until it returns to its initial position (i.e., returns to the state of force balance).

[0095] Preferably, there are multiple third elastic elements 205, which are arranged at intervals along the circumference of the second valve core 202 to ensure that the fourth cone valve is subjected to uniform force and can be quickly reset.

[0096] It should be noted that the first elastic element 1090, the second elastic element 1091, and the third elastic element 205 can also be other structures with elastic properties, such as spring sheets. That is, in the initial state, the first cone valve core 103 and the second cone valve core 104, under the action of the first elastic element 1090 and the second elastic element 1091 respectively, can respectively block the first opening and the second opening. When the external control port 2004 is depressurized, the fourth cone valve core 2022, under the elastic force of the third elastic element 205, can return to its initial state.

[0097] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0098] 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 invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0099] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0100] In this invention, unless otherwise explicitly 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 is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply 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 that the first feature is at a lower horizontal level than the second feature.

[0101] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0102] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A three-way digital valve, characterized in that, include: A pilot valve having a first valve chamber, the pilot valve including a first valve core, the first valve core being inserted into the pilot valve, the first valve core being movable along the axis of the first valve core; A main valve having a second valve chamber, the main valve including a second valve core, the second valve core being inserted into the main valve, the second valve core being movable along the axis of the second valve core; A first connector and a second connector, wherein the first connector includes a first connecting portion and a first mating portion, and the second connector includes a second connecting portion and a second mating portion, wherein the first connecting portion is connected to the first valve core, the second connecting portion is connected to the second valve core, and the first mating portion is connected to the second mating portion, so that one of the first connector and the second connector rotates, thereby driving the other of the first connector and the second connector to rotate.

2. The three-way digital valve according to claim 1, characterized in that, The first valve chamber includes a first high-pressure chamber, a first chamber, a low-pressure chamber, a second chamber, and a second high-pressure chamber arranged sequentially. The second valve chamber includes a third chamber, a third high-pressure chamber, and a fourth chamber arranged sequentially. The main valve also includes a high-pressure oil port, a low-pressure oil port, an inlet / outlet oil port, and an external control port. The first high-pressure chamber, the second high-pressure chamber, and the third high-pressure chamber are all connected to the high-pressure oil port. The low-pressure oil port is connected to the low-pressure chamber. The first chamber is connected to the third chamber, and the second chamber is connected to the fourth chamber. The three-way digital valve further includes a first cone valve core, a second cone valve core, a third cone valve core, and a fourth cone valve core. The first cone valve core and the second cone valve core are sleeved on the first valve core and are movable along the axis of the first cone valve core. The third cone valve core is disposed on the second valve core and is used to block and open the high-pressure oil port and the inlet and outlet oil ports. The fourth cone valve core is sleeved on the second valve core and is used to block and open the low-pressure oil port, the inlet and outlet oil ports, and the external control port.

3. The three-way digital valve according to claim 2, characterized in that, The three-way digital valve has a first state and a second state. In the first state, the second cone valve core connects the second high-pressure chamber and the second chamber, so that the liquid in the second high-pressure chamber flows into the fourth chamber through the second chamber, and the low-pressure chamber is connected to the first chamber. The liquid in the low-pressure chamber flows into the third chamber through the first chamber, so that the second valve core moves along the first direction. In the second state, the first cone valve core connects the first high-pressure chamber and the first chamber, so that the liquid in the first high-pressure chamber flows into the third chamber sequentially through the first chamber, and the low-pressure chamber is connected to the second chamber, so that the liquid in the low-pressure chamber flows into the fourth chamber through the second chamber, so that the second valve core moves in the second direction, the first direction being opposite to the second direction.

4. The three-way digital valve according to claim 3, characterized in that, It also includes a first valve seat and a second valve seat, both of which have cavities. The first valve seat is located inside the first high-pressure chamber, and the cavity of the first valve seat is in communication with the first high-pressure chamber. The first cone valve core is disposed inside the cavity of the first valve seat and is used to conduct and block the cavity of the first valve seat and the first chamber. The second valve seat is located inside the second high-pressure chamber, and the cavity of the second valve seat is connected to the second high-pressure chamber. The second cone valve core is located inside the cavity of the second valve seat and is used to connect and disconnect the cavity of the second valve seat and the second chamber.

5. The three-way digital valve according to claim 4, characterized in that, It also includes a first elastic element and a second elastic element. The first valve seat also includes a first opening. The first opening is located on the side of the first valve seat adjacent to the first cavity. The first opening connects the cavity of the first valve seat and the first cavity. The first elastic element is connected between the bottom wall of the cavity of the first valve seat and the first cone valve core, so that the first cone valve core blocks the first opening. The second valve seat further includes a second opening, which is located on the side of the second valve seat adjacent to the second cavity. The second opening connects the cavity of the second valve seat and the second cavity. The second elastic element is connected between the bottom wall of the cavity of the second valve seat and the second cone valve core, so that the second cone valve core blocks the second opening.

6. The three-way digital valve according to claim 5, characterized in that, The first cone valve core has a first peripheral wall surface and a first side surface and a second side surface that are opposite to each other along the axial direction of the first valve core. The first peripheral wall surface contacts the peripheral wall surface of the cavity of the first valve seat. The first cone valve core also includes at least one first connecting hole, which penetrates the first side surface and the second side surface. The second cone valve core has a second peripheral wall surface and a third side surface and a fourth side surface that are axially opposite to the first valve core. The second peripheral wall surface contacts the peripheral wall surface of the cavity of the second valve seat. The second cone valve core also includes at least one second connecting hole that penetrates the third side surface and the fourth side surface.

7. The three-way digital valve according to claim 6, characterized in that, The first valve core further includes a first protrusion and a second protrusion. The first protrusion is located within the first cavity and adjacent to the first cone valve core, and the second protrusion is located within the second cavity and adjacent to the second cone valve core. In the first state, the second protrusion abuts against the second cone valve core, so that the second cone valve core connects the cavity of the second valve seat and the second cavity. In the second state, the first protrusion abuts against the first cone valve core, so that the first cone valve core connects the cavity of the first valve seat and the first cavity.

8. The three-way digital valve according to claim 1, characterized in that, It also includes a first guide member and a second guide member. The first guide member is disposed in the first valve cavity, and the first valve core is provided with a first guide portion that matches the first guide member. The second guide member is disposed in the second valve cavity, and the second valve core is provided with a second guide portion that matches the second guide member.

9. The three-way digital valve according to claim 8, characterized in that, It also includes a driving component, which includes a driving part connected to the first valve core to drive the first valve core to rotate.

10. The three-way digital valve according to claim 2, characterized in that, It also includes a third elastic element, the second valve chamber includes a first mounting surface, the fourth cone valve core includes a second mounting surface, the first mounting surface and the second mounting surface are arranged at an axial distance along the second valve core, and the elastic element is connected between the first mounting surface and the second mounting surface.

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