A four-way poppet valve and hydraulic system

Abstract

The application provides a four-way cone valve and a hydraulic system. The four-way cone valve comprises a valve body, a first valve core, a second valve core and first to fourth cone valve cores. The valve body has a first valve cavity and a second valve cavity. The first valve cavity comprises a first high-pressure cavity, a first cavity, a second cavity and a second high-pressure cavity. The second valve cavity comprises a third cavity, a low-pressure cavity and a fourth cavity. The first valve core is movably inserted into the first valve cavity. The second valve core is movably inserted into the second valve cavity. The first and second cone valve cores are movably sleeved on the first valve core. The third and fourth cone valve cores are movably sleeved on the second valve core. The first cone valve core can conduct and block the first high-pressure cavity and the first cavity. The second cone valve core can conduct and block the second high-pressure cavity and the second cavity. The third cone valve core can conduct and block the third cavity and the low-pressure cavity. The fourth cone valve core can conduct and block the third cavity and the low-pressure cavity. The four-way cone valve has the advantages of high linearity and high control precision.

Description

Technical Field

[0001] This invention relates to the field of hydraulic valve technology, specifically to a four-way cone valve and a hydraulic system. Background Technology

[0002] In hydraulic transmission, precise control of the speed and position of hydraulic cylinders is often required. Traditional methods employ servo valves or proportional valves, sensors built into the cylinders, and high-speed sampling and computational computer control systems to achieve precise speed and position control through complex control algorithms and strategies. The main types of valve cores include spool valves, cone valves, and ball valves. The device driving the valve core to move relative to the valve body can be a manual mechanism, a spring or electromagnet, or hydraulic force. Proportional valves or pilot-operated proportional valves in related technologies rely on proportional electromagnets to drive the valve core. Different currents in the control coil generate different thrusts to move the first-stage valve core, outputting different pressures to drive the second-stage valve core, thus producing different valve openings and outputting different flow rates, thereby controlling the speed or displacement of actuators such as hydraulic cylinders. However, the magnetic attraction of the proportional electromagnet is affected by position, causing the valve core to remain stationary while the force changes, resulting in poor linearity. Furthermore, using sensors to detect the position of the valve core or cylinder and performing electro-hydraulic feedback control to adjust the force exerted on the proportional electromagnet by the electromagnet results in poor control accuracy and slow response speed. Furthermore, using a slide valve for gap sealing can easily lead to leakage. Summary of the Invention

[0003] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0004] 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.

[0005] 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.

[0006] The present invention aims to at least partially solve one of the technical problems in the related art.

[0007] Therefore, embodiments of the present invention propose a four-way cone valve, which has the advantages of high linearity, high control accuracy, fast response speed, and low leakage.

[0008] The embodiments of the present invention provide a hydraulic system in which the hydraulic cylinder has the advantages of high linearity, high control precision, fast response speed and low leakage.

[0009] The four-way cone valve of this invention includes: a valve body, the valve body having a first valve chamber and a second valve chamber, the first valve chamber including a first high-pressure chamber, a first chamber, a second chamber and a second high-pressure chamber arranged in sequence, and the second valve chamber including a third chamber, a low-pressure chamber and a fourth chamber arranged in sequence;

[0010] A first valve core and a second valve core, wherein the first end of the first valve core is inserted into the first valve cavity, the first valve core is movable along the axis of the first valve core, and the second end of the first valve core is located outside the valve body; the first end of the second valve core is inserted into the second valve cavity, the second valve core is movable along the axis of the second valve core, and the second end of the second valve core is located outside the valve body.

[0011] First to fourth cone valve cores, the first and second cone valve cores are sleeved on the first valve core and movable along the axis of the first valve core, the third and fourth cone valve cores are sleeved on the second valve core and movable along the axis of the second valve core, the first cone valve core is located in the first high-pressure chamber and is used to open and close the first high-pressure chamber and the first chamber, the second cone valve core is located in the second high-pressure chamber and is used to open and close the second high-pressure chamber and the second chamber, the third cone valve core is located in the third chamber and is used to open and close the third chamber and the low-pressure chamber, and the fourth cone valve core is located in the fourth chamber and is used to open and close the third chamber and the low-pressure chamber;

[0012] The valve body also has a high-pressure oil port, a low-pressure oil port, a first inlet / outlet oil port and a second inlet / outlet oil port. The first high-pressure chamber and the second high-pressure chamber are both 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 first inlet / outlet oil port and the third chamber. The second chamber is connected to the second inlet / outlet oil port and the fourth chamber.

[0013] In this embodiment of the invention, the four-way cone valve moves at least two of the first to fourth cone valve cores by moving the first and second valve cores, thereby realizing the conduction and reversing function of the four-way cone valve. The first and second cone valve cores can be driven by a motor or the like to facilitate control of their displacement, thereby improving the linearity of the four-way cone valve. Furthermore, the fact that the first and second valve cores are driven by a motor also allows the cone valve cores to have a relatively constant moving speed, thus improving the stability of the four-way cone valve in use.

[0014] In addition, for example, by using the first cone valve core to seal the first high-pressure chamber and the first chamber, the sealing between the first high-pressure chamber and the first chamber can be improved, and leakage of liquids with low viscosity can be avoided.

[0015] Therefore, the four-way cone valve of the present invention has the advantages of high linearity, high control accuracy, fast response speed, and low leakage.

[0016] In some embodiments, the four-way cone valve has a first state and a second state. In the first 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 is discharged sequentially through the first chamber and the first inlet / outlet port. The fourth cone valve core connects the low-pressure chamber and the fourth chamber, so that the low-pressure liquid in the low-pressure chamber is discharged sequentially through the second chamber and the second inlet / outlet port. The second cone valve core blocks the second high-pressure chamber and the second chamber, and the third cone valve core blocks the third chamber and the low-pressure chamber.

[0017] In the second 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 is discharged sequentially through the second chamber and the second inlet / outlet port, and the third cone valve core connects the low-pressure chamber and the third chamber, so that the low-pressure liquid in the low-pressure chamber is discharged sequentially through the first chamber and the first inlet / outlet port, the first cone valve core blocks the first high-pressure chamber and the first chamber, and the fourth cone valve core blocks the fourth chamber and the low-pressure chamber.

[0018] In some embodiments, the system further includes a first valve seat to a fourth valve seat, each of which has a cavity. 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 disconnect the cavity of the first valve seat from the first chamber.

[0019] 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 disposed inside the cavity of the second valve seat and is used to conduct and block the cavity of the second valve seat and the second chamber.

[0020] The third valve seat is located in the third cavity, and the cavity of the third valve seat communicates with the third cavity. The third cone valve core is disposed in the cavity of the third valve seat and is used to conduct and block the cavity of the third valve seat and the low-pressure cavity.

[0021] The fourth valve seat is located in the fourth cavity, and the cavity of the fourth valve seat is in communication with the fourth cavity. The fourth cone valve core is disposed in the cavity of the fourth valve seat and is used to conduct and block the cavity of the fourth valve seat and the low-pressure cavity.

[0022] In some embodiments, the valve seat further includes a first elastic member to a fourth elastic member, the first valve seat further includes a first opening, the first opening is disposed 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, and 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.

[0023] 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 member 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.

[0024] The third valve seat further includes a third opening, which is located on the side of the third valve seat adjacent to the third cavity. The third opening connects the cavity of the third valve seat and the third cavity. The third elastic element is connected between the bottom wall of the cavity of the third valve seat and the third cone valve core, so that the third cone valve core blocks the third opening.

[0025] The fourth valve seat further includes a fourth opening, which is located on the side of the fourth valve seat adjacent to the fourth cavity. The fourth opening connects the cavity of the fourth valve seat and the fourth cavity. The fourth elastic element is connected between the bottom wall of the cavity of the fourth valve seat and the fourth cone valve core, so that the fourth cone valve core blocks the fourth opening.

[0026] 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.

[0027] 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.

[0028] The third cone valve core has a third peripheral wall surface and a fifth side surface and a sixth side surface that are axially opposite to the second valve core. The third peripheral wall surface contacts the peripheral wall surface of the cavity of the third valve seat. The third cone valve core also includes at least one third connecting hole that penetrates the fifth side surface and the sixth side surface.

[0029] The fourth cone valve core has a fourth peripheral wall surface and a seventh side surface and an eighth side surface that are axially opposite to the second valve core. The fourth peripheral wall surface contacts the peripheral wall surface of the cavity of the fourth valve seat. The fourth cone valve core also includes at least one fourth connecting hole that penetrates the seventh side surface and the eighth side surface.

[0030] 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 adjacent to the first cone valve core, the second protrusion being located within the second cavity and adjacent to the second cone valve core, and the second valve core including a third protrusion located within the low-pressure cavity, a first end of the third protrusion adjacent to the third cone valve core, and a second end of the third protrusion adjacent to the fourth cone valve core.

[0031] In the first 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; the second end of the third protrusion abuts against the fourth cone valve core, so that the fourth cone valve core connects the low-pressure cavity and the fourth cavity.

[0032] In the second 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, and the first end of the third protrusion abuts against the third cone valve core, so that the third cone valve core connects the low-pressure cavity and the fourth cavity.

[0033] 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.

[0034] In some embodiments, the system further includes 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.

[0035] The first connecting part is connected to the second end of the first valve core, the second connecting part is connected to the second end of the second valve core, and the first mating part is connected to the second mating part, so that one of the first connecting member and the second connecting member rotates, thereby driving the other of the first connecting member and the second connecting member to rotate, and the rotation direction of the first connecting member is opposite to the rotation direction of the second connecting member.

[0036] In some embodiments, a driving member is further included, the driving member including a driving portion connected to one of the first connector and the second connector to drive one of the first connector and the second connector to rotate.

[0037] The hydraulic system of this invention includes a four-way cone valve and a hydraulic cylinder. The four-way cone valve is the same as any one of the above embodiments. The four-way cone valve is connected to the hydraulic cylinder to drive the piston rod of the hydraulic cylinder to move. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the four-way cone valve according to an embodiment of the present invention.

[0039] Figure 2 This is a schematic diagram of the structure of the four-way cone valve of the present invention, which conceals the first to fourth cone valve cores, the first to fourth elastic elements, and the first to fourth valve seats.

[0040] Figure 3 This is a schematic diagram of the structure of the four-way cone valve according to an embodiment of the present invention.

[0041] Figure 4 yes Figure 3 The diagram shows the structure of A.

[0042] Figure label:

[0043] Valve body 1; High-pressure oil port 13; Low-pressure oil port 14; First inlet / outlet oil port 15; Second inlet / outlet oil port 16;

[0044] First valve chamber 11; First high-pressure chamber 111; First chamber 112; Second chamber 113; Second high-pressure chamber 114;

[0045] Second valve chamber 12; Third chamber 121; Low-pressure chamber 122; Fourth chamber 123;

[0046] First valve core 21; first protrusion 211; second protrusion 212; first guide portion 213;

[0047] Second valve core 22; Third protrusion 221; Second guide portion 222;

[0048] First valve seat 31; first elastic element 311; first cone valve core 312; first peripheral wall 3121; first side surface 3122; second side surface 3123; first connecting hole 3124;

[0049] Second valve seat 32; first elastic element 321; second cone valve core 322; second peripheral wall 3221; third side 3222; fourth side 3223; second connecting hole 3224;

[0050] Third valve seat 33; First elastic element 331; Third cone valve core 332; Third peripheral wall 3321; Fifth side 3322; Sixth side 3323; Third connecting hole 3324;

[0051] Fourth valve seat 34; First elastic element 341; Fourth cone valve core 342; Fourth peripheral wall 3421; Seventh side surface 3422; Eighth side surface 3423; Fourth connecting hole 3424;

[0052] First guide component 41;

[0053] Second guide component 42;

[0054] First connector 51; First connecting part 511; First mating part 512;

[0055] Second connector 52; second connecting part 521; second mating part 522;

[0056] Drive component 6; drive unit 61. Detailed Implementation

[0057] 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.

[0058] like Figures 1-4 As shown, the four-way cone valve of this invention includes: valve body 1, first valve core 21, second valve core 22, first cone valve core 312, second cone valve core 322, third cone valve core 332 and fourth cone valve core 342.

[0059] The valve body 1 has a first valve chamber 11 and a second valve chamber 12. The first valve chamber 11 includes a first high-pressure chamber 111, a first chamber 112, a second chamber 112, and a second high-pressure chamber 114 arranged sequentially. The second valve chamber 12 includes a third chamber 121, a low-pressure chamber 122, and a fourth chamber 123 arranged sequentially. A first valve core 21 has its first end inserted into the first valve chamber 11 and is movable along its axis. The second end of the first valve core 21 is located outside the valve body 1. A second valve core 22 has its first end inserted into the second valve chamber 12 and is movable along its axis. The second end of the second valve core 22 is located outside the valve body 1. The high-pressure port is used to introduce high-pressure liquid, and the low-pressure port is used to introduce low-pressure liquid.

[0060] Specifically, such as Figure 1 and Figure 2 As shown, both the first valve chamber 11 and the second valve chamber 12 extend in the left-right direction. The first valve core 21 and the second valve core 22 extend in the same direction as the left-right direction. The left end of the first valve core 21 is the first end of the first valve core 21, and the right end of the first valve core 21 is the second end of the first valve core 21. The left end of the second valve core 22 is the first end of the second valve core 22, and the right end of the second valve core 22 is the second end of the second valve core 22. The first valve core 21 and the second valve core 22 are movable in the left-right direction.

[0061] It is understandable that the right ends of the first valve core 21 and the second valve core 22 are both located on the outside of the valve body 1. Therefore, the right ends of the first valve core 21 and the second valve core 22 can be used to connect to a drive device such as a motor to drive the first valve core 21 and the second valve core 22 to move in the left and right directions.

[0062] The first cone valve core 312 and the second cone valve core 322 are sleeved on the first valve core 21 and are movable along the axis of the first valve core 21. The third cone valve core 332 and the fourth cone valve core 342 are sleeved on the second valve core 22 and are movable along the axis of the second valve core 22. The first cone valve core 312 is located in the first high-pressure chamber 111 and is used to open and close the first high-pressure chamber 111 and the first chamber 112. The second cone valve core 322 is located in the second high-pressure chamber 114 and is used to open and close the second high-pressure chamber 114 and the second chamber 112. The third cone valve core 332 is located in the third chamber 121 and is used to open and close the third chamber 121 and the low-pressure chamber 122. The fourth cone valve core 342 is located in the fourth chamber 123 and is used to open and close the third chamber 121 and the low-pressure chamber 122.

[0063] Specifically, such as Figures 1-4As shown, the movement of the first valve core 21 can drive the first cone valve core 312 or the second cone valve core 322 to move, so that the first high-pressure chamber 111 is connected to the first chamber 112 or the second high-pressure chamber 114 is connected to the second chamber 112. Similarly, the movement of the second valve core 22 can drive the third cone valve core 332 or the fourth cone valve core 342 to move, so that the third chamber 121 or the fourth chamber 123 is connected to the low-pressure chamber 122.

[0064] It is understood that when the first cone valve core 312 connects the first high-pressure chamber 111 and the first chamber 112, the second cone valve core 322 blocks the second high-pressure chamber 114 and the second chamber 112. Simultaneously, the third cone valve core 332 blocks the third chamber 121 and the low-pressure chamber 122, and the fourth cone valve core 342 connects the fourth chamber 123 and the low-pressure chamber 122. Conversely, when the second cone valve core 322 connects the second high-pressure chamber 114 and the second chamber 112, the first cone valve core 312 blocks the first high-pressure chamber 111 and the first chamber 112. Simultaneously, the third cone valve core 332 connects the third chamber 121 and the low-pressure chamber 122, and the fourth cone valve core 342 blocks the fourth chamber 123 and the low-pressure chamber 122. This achieves the conduction switching function of the four-way cone valve in this embodiment of the invention.

[0065] The valve body 1 also has a high-pressure oil port 13, a low-pressure oil port 14, a first inlet / outlet oil port 15 and a second inlet / outlet oil port 16, a first high-pressure chamber 111 and a second high-pressure chamber 114 that are both connected to the high-pressure oil port 13, a low-pressure oil port 14 that is connected to the low-pressure chamber 122, a first chamber 112 that is connected to the first inlet / outlet oil port 15 and a third chamber 121, and a second chamber 112 that is connected to the second inlet / outlet oil port 16 and a fourth chamber 123.

[0066] It is understandable that, such as Figures 1-4 As shown, for example, when the first cone valve core 312 connects the first high-pressure chamber 111 and the first chamber 112, the high-pressure liquid can pass through the high-pressure oil port 13, the first high-pressure chamber 111 and the first chamber 112 and be discharged from the first inlet and outlet oil port 15. At the same time, the low-pressure liquid can pass through the low-pressure oil port 14, the low-pressure chamber 122 and the fourth chamber 123 and be discharged from the second inlet and outlet oil port 16.

[0067] In other words, the first inlet / outlet port 15 and the second inlet / outlet port 16 of the four-way cone valve in this embodiment of the invention are connected to the hydraulic cylinder. When the first cone valve core 312 connects the first high-pressure chamber 111 and the first chamber 112, the liquid discharged from the first inlet / outlet port 15 and the second inlet / outlet port 16 can drive the piston rod of the hydraulic cylinder to move in the first direction. Conversely, when the second cone valve core 322 connects the second high-pressure chamber 114 and the second chamber 112, the first inlet / outlet port 15 discharges low-pressure liquid, and the second inlet / outlet port 16 discharges high-pressure liquid. Then, the piston rod of the hydraulic cylinder will move in the second direction, thereby improving the control accuracy and response speed of the four-way cone valve in this embodiment of the invention. The first direction and the second direction are opposite to each other.

[0068] In other words, the four-way cone valve of this embodiment of the invention moves at least two of the first cone valve core 312 to the fourth cone valve core 342 by moving the first cone valve core 21 and the second cone valve core 22 (i.e., the first cone valve core 312 and the fourth cone valve core 342 move simultaneously, and the second cone valve core 322 and the third cone valve core 332 move simultaneously), thereby realizing the conduction and reversing function of the four-way cone valve of this embodiment of the invention. The first cone valve core 312 and the second cone valve core 322 can be driven by a motor or the like to facilitate the control of the displacement of the first valve core 21 and the second valve core 22, thereby improving the linearity of the four-way cone valve of this embodiment of the invention. Furthermore, the fact that the first valve core 21 and the second valve core 22 are driven by a motor can also make the cone valve core have a relatively constant moving speed, thereby improving the stability of the four-way cone valve of this embodiment of the invention.

[0069] In addition, for example, by using the first cone valve core 312 to block the first high-pressure chamber 111 and the first chamber 112, the sealing between the first high-pressure chamber 111 and the first chamber 112 can be improved, and leakage of liquids with low viscosity can be avoided.

[0070] Therefore, the four-way cone valve of the present invention has the advantages of high linearity, high control accuracy, fast response speed, and low leakage.

[0071] It should be noted that the pressure of high-pressure liquid is greater than 16 MPa, and the pressure of low-pressure liquid is less than 8 MPa.

[0072] In some embodiments, the four-way cone valve has a first state and a second state. In the first state, the first cone valve core 312 connects the first high-pressure chamber 111 and the first chamber 112, so that the high-pressure liquid in the first high-pressure chamber 111 is discharged sequentially through the first chamber 112 and the first inlet / outlet port 15, and the fourth cone valve core 342 connects the low-pressure chamber 122 and the fourth chamber 123, so that the low-pressure liquid in the low-pressure chamber 122 is discharged sequentially through the second chamber 112 and the second inlet / outlet port 16, the second cone valve core 322 blocks the second high-pressure chamber 114 and the second chamber 112, and the third cone valve core 332 blocks the third chamber 121 and the low-pressure chamber 122.

[0073] Understandably, in the first state, the first cone valve core 312 connects the first high-pressure chamber 111 and the first chamber 112, the second cone valve core 322 blocks the second high-pressure chamber 114 and the second chamber 112, the third cone valve core 332 blocks the third chamber 121 and the low-pressure chamber 122, and the fourth cone valve core 342 connects the low-pressure chamber 122 and the fourth chamber 123.

[0074] In the second state, the second cone valve core 322 connects the second high-pressure chamber 114 and the second chamber 112, so that the high-pressure liquid in the second high-pressure chamber 114 is discharged sequentially through the second chamber 112 and the second inlet / outlet port 16, and the third cone valve core 332 connects the low-pressure chamber 122 and the third chamber 121, so that the low-pressure liquid in the low-pressure chamber 122 is discharged sequentially through the first chamber 112 and the first inlet / outlet port 15, the first cone valve core 312 blocks the first high-pressure chamber 111 and the first chamber 112, and the fourth cone valve core 342 blocks the fourth chamber 123 and the low-pressure chamber 122.

[0075] Understandably, in the second state, the first cone valve core 312 blocks the first high-pressure chamber 111 and the first chamber 112, the second cone valve core 322 connects the second high-pressure chamber 114 and the second chamber 112, the third cone valve core 332 connects the third chamber 121 and the low-pressure chamber 122, and the fourth cone valve core 342 blocks the low-pressure chamber 122 and the fourth chamber 123.

[0076] In some embodiments, the four-way cone valve of the present invention further includes a first valve seat 31, a second valve seat 32, a third valve seat 33, and a fourth valve seat 34. Each of the first valve seat 31 to the fourth valve seat 34 has a cavity. The first valve seat 31 is located within a first high-pressure chamber 111, and the cavity of the first valve seat 31 communicates with the first high-pressure chamber 111. A first cone valve core 312 is disposed within the cavity of the first valve seat 31 and is used to connect and disconnect the cavity of the first valve seat 31 and the first chamber 112. Specifically, as shown... Figures 1-4 As shown, the first valve seat 31 is located in the first high-pressure chamber 111 and the first cone valve core 312 is located in the first valve seat 31. The left end of the first valve core 21 passes through the first valve seat 31 and the first cone valve core 312 in a direction from right to left, thereby facilitating the installation of the first cone valve core 312.

[0077] The second valve seat 32 is located within the second high-pressure chamber 114, and the cavity of the second valve seat 32 communicates with the second high-pressure chamber 114. The second cone valve core 322 is disposed within the cavity of the second valve seat 32 and is used to connect and disconnect the cavity of the second valve seat 32 and the second chamber 112. Specifically, as shown... Figures 1-4 As shown, the second valve seat 32 is located inside the second high-pressure chamber 114 and the second cone valve core 322 is located inside the second valve seat 32. The left end of the first valve core 21 passes through the second valve seat 32 and the second cone valve core 322 in a direction from right to left, thereby facilitating the installation of the second cone valve core 322.

[0078] The third valve seat 33 is located within the third cavity 121, and the cavity of the third valve seat 33 communicates with the third cavity 121. The third cone valve core 332 is disposed within the cavity of the third valve seat 33 and is used to connect and disconnect the cavity of the third valve seat 33 and the low-pressure cavity 122. Specifically, as shown... Figures 1-4As shown, the third valve seat 33 is located in the third cavity 121 and the third cone valve core 332 is located in the third valve seat 33. The left end of the second valve core 22 passes through the third valve seat 33 and the third cone valve core 332 in a direction from right to left, thereby facilitating the installation of the third cone valve core 332.

[0079] The fourth valve seat 34 is located within the fourth cavity 123, and the cavity of the fourth valve seat 34 communicates with the fourth cavity 123. The fourth cone valve core 342 is disposed within the cavity of the fourth valve seat 34 and is used to connect and disconnect the cavity of the fourth valve seat 34 and the low-pressure cavity 122. Specifically, as shown... Figures 1-4 As shown, the fourth valve seat 34 is located in the fourth cavity 123 and the fourth cone valve core 342 is located in the fourth valve seat 34. The left end of the second valve core 22 passes through the fourth valve seat 34 and the fourth cone valve core 342 in a direction from right to left, thereby facilitating the installation of the fourth cone valve core 342.

[0080] In some embodiments, the four-way cone valve of the present invention further includes a first elastic element 311, a second elastic element 321, a third elastic element 331, and a fourth elastic element 341. The first valve seat 31 further includes a first opening, which is disposed on the side of the first valve seat 31 adjacent to the first cavity 112. The first opening communicates the cavity of the first valve seat 31 and the first cavity 112. The first elastic element 311 is connected between the bottom wall of the cavity of the first valve seat 31 and the first cone valve core 312, so that the first cone valve core 312 blocks the first opening. Specifically, as shown... Figures 1-4 As shown, the first opening is opened on the right side of the first valve seat 31, the left end of the first elastic member 311 is connected to the bottom wall of the cavity of the first valve seat 31, and the right end of the first elastic member 311 is connected to the first cone valve core 312, so that when the four-way cone valve of the present invention is in the initial state, the first cone valve core 312 blocks the first opening under the action of the elastic force of the first elastic member 311.

[0081] The second valve seat 32 also includes a second opening, which is located on the side of the second valve seat 32 adjacent to the second cavity 112. The second opening connects the cavity of the second valve seat 32 and the second cavity 112. The second elastic member 321 is connected between the bottom wall of the cavity of the second valve seat 32 and the second cone valve core 322, so that the second cone valve core 322 blocks the second opening. Specifically, as shown... Figures 1-4 As shown, the second opening is opened on the left side of the second valve seat 32. The right end of the second elastic member 321 is connected to the bottom wall of the cavity of the second valve seat 32, and the left end of the second elastic member 321 is connected to the second cone valve core 322, so that when the four-way cone valve of the present invention is in the initial state, the second cone valve core 322 blocks the second opening under the action of the elastic force of the second elastic member 321.

[0082] The third valve seat 33 also includes a third opening, which is located on the side of the third valve seat 33 adjacent to the third cavity 121. The third opening connects the cavity of the third valve seat 33 and the third cavity 121. The third elastic member 331 is connected between the bottom wall of the cavity of the third valve seat 33 and the third cone valve core 332, so that the third cone valve core 332 blocks the third opening. Specifically, as shown... Figures 1-4 As shown, the third opening is located on the right side of the third valve seat 33. The left end of the third elastic member 331 is connected to the bottom wall of the cavity of the third valve seat 33, and the right end of the third elastic member 331 is connected to the third cone valve core 332, so that in the initial state of the four-way cone valve of the present invention, the third cone valve core 332 blocks the third opening under the action of the elastic force of the third elastic member 331.

[0083] The fourth valve seat 34 also includes a fourth opening, which is located on the side of the fourth valve seat 34 adjacent to the fourth cavity 123. The fourth opening connects the cavity of the fourth valve seat 34 and the fourth cavity 123. The fourth elastic member 341 is connected between the bottom wall of the cavity of the fourth valve seat 34 and the fourth cone valve core 342, so that the fourth cone valve core 342 blocks the fourth opening. Specifically, as shown... Figures 1-4 As shown, the fourth opening is located on the left side of the fourth valve seat 34. The right end of the fourth elastic member 341 is connected to the bottom wall of the cavity of the fourth valve seat 34, and the left end of the fourth elastic member 341 is connected to the fourth cone valve core 342, so that in the initial state of the four-way cone valve of this embodiment, the fourth cone valve core 342 blocks the fourth opening under the action of the elastic force of the fourth elastic member 341.

[0084] It is understandable that, such as Figures 1-4 As shown, the first elastic element 311, the second elastic element 321, the third elastic element 331, and the fourth elastic element 341 are springs. Taking the first cone valve core 312 as an example, in the initial state, the first cone valve core 312 can block the first opening under the elastic force of the first elastic element 311 from left to right, thereby blocking the cavity of the first valve seat 31 and the first cavity 112. Similarly, the second cone valve core 322, the third cone valve core 332, and the fourth cone valve core 342 all block the second, third, and fourth openings under the elastic force of the elastic elements.

[0085] It should be noted that the first elastic element 311, the second elastic element 321, the third elastic element 331, and the fourth elastic element 341 can also be other structures with elastic properties, such as spring sheets. That is to say, in the initial state, the four-way cone valve of this embodiment can block the first opening, the second opening, the third opening, and the fourth opening respectively under the elastic force of the first elastic element 311, the second elastic element 321, the third elastic element 331, and the fourth elastic element 341.

[0086] In some embodiments, the first cone valve core 312 has a first peripheral wall surface 3121 and a axial surface along the first valve core 21 (e.g., ...). Figure 1 The first side 3122 and the second side 3123 are opposite each other in the left and right direction. The first peripheral wall 3121 is in contact with the peripheral wall of the cavity of the first valve seat 31. The first cone valve core 312 also includes at least one first connecting hole 3124, which penetrates the first side 3122 and the second side 3123.

[0087] Specifically, such as Figures 1-4 As shown, the left side of the first cone valve core 312 is the first side surface 3122, and the right side of the first cone valve core 312 is the second side surface 3123. The axial direction of the first connecting hole 3124 is consistent with the left-right direction. The first peripheral wall surface 3121 slides in contact with the peripheral wall surface of the cavity of the first valve seat 31, that is, the first cone valve core 312 is movable relative to the first valve seat 31, and during the movement, the first peripheral wall surface 3121 contacts the peripheral wall surface of the cavity of the first valve seat 31 to avoid high-pressure liquid leakage from the gap between the first peripheral wall surface 3121 and the peripheral wall surface of the cavity of the first valve seat 31.

[0088] Understandably, when the first cone valve core 312 connects the cavity of the first valve seat 31 and the first chamber 112, high-pressure liquid can flow into the first chamber 112 through the first high-pressure chamber 111, the cavity of the first valve seat 31, and the first connecting hole 3124, so that the high-pressure liquid can be discharged through the first inlet / outlet port 15. Preferably, a plurality of first connecting holes 3124 are arranged at intervals along the circumference of the first cone valve core 312 to increase the flow rate of the high-pressure liquid.

[0089] The second cone valve core 322 has a second peripheral wall surface 3221 and a third side surface 3222 and a fourth side surface 3223 that are axially opposite to the first valve core 21. The second peripheral wall surface 3221 contacts the peripheral wall surface of the cavity of the second valve seat 32. The second cone valve core 322 also includes at least one second connecting hole 3224, which penetrates the third side surface 3222 and the fourth side surface 3223.

[0090] Specifically, such as Figures 1-4 As shown, the left side of the second cone valve core 322 is the third side surface 3222, and the right side of the second cone valve core 322 is the fourth side surface 3223. The axial direction of the second connecting hole 3224 is consistent with the left-right direction. The second peripheral wall surface 3221 slides in contact with the peripheral wall surface of the cavity of the second valve seat 32, that is, the second cone valve core 322 is movable relative to the second valve seat 32, and during the movement, the second peripheral wall surface 3221 contacts the peripheral wall surface of the cavity of the second valve seat 32 to prevent high-pressure liquid from leaking from between the second peripheral wall surface 3221 and the peripheral wall surface of the cavity of the second valve seat 32.

[0091] Understandably, when the second cone valve core 322 connects the cavity of the second valve seat 32 and the second chamber 112, high-pressure liquid can flow into the second chamber 112 through the second high-pressure chamber 114, the cavity of the second valve seat 32, and the second connecting hole 3224, so that the high-pressure liquid can be discharged through the second inlet / outlet port 16. Preferably, a plurality of second connecting holes 3224 are arranged at intervals along the circumference of the second cone valve core 322 to increase the flow rate of the high-pressure liquid.

[0092] The third cone valve core 332 has a third peripheral wall surface 3321 and a fifth side surface 3322 and a sixth side surface 3323 that are axially opposite to the second valve core 22. The third peripheral wall surface 3321 contacts the peripheral wall surface of the cavity of the third valve seat 33. The third cone valve core 332 also includes at least one third connecting hole 3324, which penetrates the fifth side surface 3322 and the sixth side surface 3323.

[0093] Specifically, such as Figures 1-4 As shown, the left side of the third cone valve core 332 is the fifth side surface 3322, and the right side of the third cone valve core 332 is the sixth side surface 3323. The axial direction of the third connecting hole 3324 is consistent with the left-right direction. The third peripheral wall surface 3321 is in sliding contact with the peripheral wall surface of the cavity of the third valve seat 33. That is, the third cone valve core 332 is movable relative to the third valve seat 33, and during the movement, the third peripheral wall surface 3321 is in contact with the peripheral wall surface of the cavity of the third valve seat 33 to avoid low-pressure liquid leakage from the gap between the third peripheral wall surface 3321 and the peripheral wall surface of the cavity of the third valve seat 33.

[0094] Understandably, when the third cone valve core 332 connects the cavity of the third valve seat 33 and the low-pressure chamber 122, the low-pressure liquid can flow into the first chamber 112 through the cavity of the third valve seat 33 and the third chamber 121, so that the low-pressure liquid can be discharged through the first inlet / outlet port 15. Preferably, a plurality of third connecting holes 3324 are arranged at intervals along the circumference of the third cone valve core 332 to increase the flow rate of the low-pressure liquid.

[0095] The fourth cone valve core 342 has a fourth peripheral wall surface 3421 and a seventh side surface 3422 and an eighth side surface 3423 that are axially opposite to the second valve core 22. The fourth peripheral wall surface 3421 contacts the peripheral wall surface of the cavity of the fourth valve seat 34. The fourth cone valve core 342 also includes at least one fourth connecting hole 3424, which penetrates the seventh side surface 3422 and the eighth side surface 3423.

[0096] Specifically, such as Figures 1-4As shown, the left side of the fourth cone valve core 342 is the seventh side surface 3422, and the right side of the fourth cone valve core 342 is the eighth side surface 3423. The axial direction of the fourth connecting hole 3424 is consistent with the left-right direction. The fourth peripheral wall surface 3421 is in sliding contact with the peripheral wall surface of the cavity of the fourth valve seat 34. That is, the fourth cone valve core 342 is movable relative to the fourth valve seat 34, and during the movement, the fourth peripheral wall surface 3421 is in contact with the peripheral wall surface of the cavity of the fourth valve seat 34 to prevent low-pressure liquid from leaking between the fourth peripheral wall surface 3421 and the peripheral wall surface of the cavity of the fourth valve seat 34.

[0097] Understandably, when the fourth cone valve core 342 connects the cavity of the fourth valve seat 34 and the low-pressure chamber 122, the low-pressure liquid can flow into the second chamber 112 through the cavity of the fourth valve seat 34 and the fourth chamber 123, so that the low-pressure liquid can be discharged through the second inlet / outlet port 16. Preferably, a plurality of fourth connecting holes 3424 are arranged at intervals along the circumference of the fourth cone valve core 342 to increase the flow rate of the low-pressure liquid.

[0098] In some embodiments, such as Figures 1-4 As shown, the first valve core 21 also includes a first protrusion 211 and a second protrusion 212. The first protrusion 211 is located in the first cavity 112 and is disposed adjacent to the first cone valve core 312. The second protrusion 212 is located in the second cavity 112 and is disposed adjacent to the second cone valve core 322. The second valve core 22 includes a third protrusion 221 located in the low-pressure cavity 122. The first end of the third protrusion 221 is adjacent to the third cone valve core 332, and the second end of the third protrusion 221 is adjacent to the fourth cone valve core 342.

[0099] In the first state, the first protrusion 211 abuts against the first cone valve core 312, so that the first cone valve core 312 conducts the cavity of the first valve seat 31 and the first cavity 112. The second end of the third protrusion 221 abuts against the fourth cone valve core 342, so that the fourth cone valve core 342 conducts the low-pressure cavity 122 and the fourth cavity 123. It can be understood that when the first valve core 21 moves in a right-to-left direction, the first protrusion 211 abuts against the second side surface 3123 of the first cone valve core 312, and pushes the first cone valve core 312 to move from right to left against the elastic force of the first elastic member 311, thereby allowing the first cone valve core 312 to conduct the cavity of the first valve seat 31 and the first cavity 112. Similarly, as the first valve core 21 moves from right to left, the second valve core 22 moves from left to right. The third protrusion 221 pushes the fourth cone valve core 342, causing the fourth cone valve core 342 to overcome the elastic force of the fourth elastic element 341 and move from left to right, thereby enabling the fourth cone valve core 342 to conduct the low-pressure chamber 122 and the fourth chamber 123.

[0100] In the second state, the second protrusion 212 abuts against the second cone valve core 322, so that the second cone valve core 322 conducts through the cavity of the second valve seat 32 and the second chamber 112. The first end of the third protrusion 221 abuts against the third cone valve core 332, so that the third cone valve core 332 conducts through the low-pressure chamber 122 and the fourth chamber 123. It can be understood that when the first valve core 21 moves from left to right, the second protrusion 212 abuts against the third side surface 3222 of the second cone valve core 322, and pushes the second cone valve core 322 to move from left to right against the elastic force of the second elastic member 321, thereby allowing the second cone valve core 322 to conduct through the cavity of the second valve seat 32 and the second chamber 112. Similarly, as the second valve core 22 moves from left to right, the third valve core moves from right to left. The third protrusion 221 pushes the third cone valve core 332 to overcome the elastic force of the third elastic element 331 and move from right to left, thereby enabling the third cone valve core 332 to conduct the low-pressure chamber 122 and the third chamber 121.

[0101] In some embodiments, the four-way cone 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 11, and the first valve core 21 is provided with a first guide portion 213 that matches the first guide member 41. The second guide member 42 is disposed in the second valve cavity 12, and the second valve core 22 is provided with a second guide portion 222 that matches the second guide member 42.

[0102] Specifically, such as Figures 1-4 As shown, the first guide member 41 is an annular member, arranged around the first valve core 21. The outer peripheral surface of the first guide portion 213 contacts the inner peripheral surface of the first guide member 41 to reduce vibration generated when the first valve core 21 moves and improve the stability of the first valve core 21. Similarly, the second guide member 42 is an annular member, arranged around the second valve core 22. The outer peripheral surface of the second guide portion 222 contacts the inner peripheral surface of the second guide member 42.

[0103] It is understood that there can be multiple first guide members 41 and multiple first guide portions 213, and each of the multiple first guide members 41 corresponds to one of the multiple first guide portions 213. Preferably, the multiple first guide members 41 are arranged at intervals along the axial direction of the first valve core 21, thereby further improving the stability of the first valve core 21. Similarly, there can be multiple second guide members 42 and multiple second guide portions 222, and each of the multiple second guide members 42 corresponds to one of the multiple second guide portions 222.

[0104] In some embodiments, the four-way cone valve of the present invention further includes a first connecting member 51 and a second connecting member 52. The first connecting member 51 includes a first connecting portion 511 and a first mating portion 512. The second connecting member 52 includes a second connecting portion 521 and a second mating portion 522. The first connecting portion 511 is connected to the second end of the first valve core 21, the second connecting portion 521 is connected to the second end of the second valve core 22, and the first mating portion 512 is connected to the second mating portion 522, so that one of the first connecting member 51 and the second connecting member 52 rotates, thereby driving the other of the first connecting member 51 and the second connecting member 52 to rotate, and the rotation direction of the first connecting member 51 is opposite to the rotation direction of the second connecting member 52.

[0105] It is understandable that, such as Figures 1-4 As shown, the first connecting portion 511 and the second end of the first valve core 21 can be connected by threads, that is, one of the first connecting portion 511 and the first valve core 21 has internal threads, and the other of the first connecting portion 511 and the first valve core 21 has external threads. The second connecting portion 521 and the second end of the second valve core 22 can also be connected by threads, that is, one of the second connecting portion 521 and the second valve core 22 has internal threads, and the other of the second connecting portion 521 and the second valve core 22 has external threads. The first mating portion 512 and the second mating portion 522 can be a gear set that meshes with each other, and the gears in the gear set have the same specifications.

[0106] In other words, when one of the first mating part 512 and the second mating part 522 is rotated, the other of the first mating part 512 and the second mating part 522 also rotates simultaneously, and the rotation directions of the first mating part 512 and the second mating part 522 are opposite. Simultaneously, since the second end of the first valve core 21 is threadedly connected to the first connecting part 511, the rotation of the first mating part 512 causes the first valve core 21 to move in the left-right direction. Similarly, when the first valve core 21 moves in the left-right direction, the second valve core 22 also moves in the left-right direction, and the movement directions of the first valve core 21 and the second valve core 22 are opposite.

[0107] In some embodiments, the four-way cone valve of the present invention further includes a drive member 6, which includes a drive part 61. The drive part 61 is connected to one of the first connector 51 and the second connector 52 to drive one of the first connector 51 and the second connector 52 to rotate.

[0108] Specifically, such as Figures 1-4 As shown, the driving component 6 can be a motor, and the driving part 61 is the output shaft of the motor. The driving part 61 can be connected to one of the first connecting component 51 and the second connecting component 52 through a coupling, thereby starting the driving component 6 and realizing the function of driving the first connecting component 51 and the second connecting component 52 to rotate.

[0109] It should be noted that the four-way cone valve in this embodiment of the invention is driven by a motor, and the rotation of the first connecting member 51 and the second connecting member 52 is converted into the movement of the first valve core 21 and the second valve core 22. Therefore, the opening and closing accuracy of the cone valve driven by the first valve core 21 and the second valve core 22 is related to the rotation accuracy of the motor. Preferably, the driving member 6 is a servo motor to improve the opening and closing accuracy of the four-way cone valve in this embodiment of the invention.

[0110] The hydraulic system of this invention includes a four-way cone valve and a hydraulic cylinder. The four-way cone valve is any of the four-way cone valves described in the above embodiments. The four-way cone valve is connected to the hydraulic cylinder to drive the piston rod of the hydraulic cylinder to move.

[0111] It is understood that, since the hydraulic system of this embodiment includes the four-way cone valve of the above embodiment, and the four-way cone valve is driven by a servo motor and has high opening and closing accuracy, and the first connecting member and the second connecting member are respectively threaded to the first valve core and the second valve core, so that the movement of the first valve core and the second valve core is stable, the opening and closing of the cone valve core can be more stable. Therefore, by connecting the four-way cone valve of the above embodiment to the hydraulic cylinder, the extension and retraction of the piston rod of the hydraulic cylinder can be more stable.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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 four-way cone valve, characterized in that, include: The valve body has a first valve chamber and a second valve chamber. The first valve chamber includes a first high-pressure chamber, a first chamber, a second chamber, and a second high-pressure chamber arranged in sequence. The second valve chamber includes a third chamber, a low-pressure chamber, and a fourth chamber arranged in sequence. A first valve core and a second valve core, wherein the first end of the first valve core is inserted into the first valve cavity, the first valve core is movable along the axis of the first valve core, and the second end of the first valve core is located outside the valve body; the first end of the second valve core is inserted into the second valve cavity, the second valve core is movable along the axis of the second valve core, and the second end of the second valve core is located outside the valve body. The first to fourth cone valve cores are sleeved on the first valve core and movable along the axis of the first valve core. The third and fourth cone valve cores are sleeved on the second valve core and movable along the axis of the second valve core. The first cone valve core is located in the first high-pressure chamber and is used to open and close the first high-pressure chamber and the first chamber. The second cone valve core is located in the second high-pressure chamber and is used to open and close the second high-pressure chamber and the second chamber. The third cone valve core is located in the third chamber and is used to open and close the third chamber and the low-pressure chamber. The fourth cone valve core is located in the fourth chamber and is used to open and close the fourth chamber and the low-pressure chamber. The valve body also has a high-pressure oil port, a low-pressure oil port, a first inlet / outlet oil port and a second inlet / outlet oil port. The first high-pressure chamber and the second high-pressure chamber are both 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 first inlet / outlet oil port and the third chamber. The second chamber is connected to the second inlet / outlet oil port and the fourth chamber.

2. The four-way cone valve according to claim 1, characterized in that, The four-way cone valve has a first state and a second state. In the first 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 is discharged sequentially through the first chamber and the first inlet / outlet. The fourth cone valve core connects the low-pressure chamber and the fourth chamber, so that the low-pressure liquid in the low-pressure chamber is discharged sequentially through the second chamber and the second inlet / outlet. The second cone valve core blocks the second high-pressure chamber and the second chamber, and the third cone valve core blocks the third chamber and the low-pressure chamber. In the second 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 is discharged sequentially through the second chamber and the second inlet / outlet port, and the third cone valve core connects the low-pressure chamber and the third chamber, so that the low-pressure liquid in the low-pressure chamber is discharged sequentially through the first chamber and the first inlet / outlet port, the first cone valve core blocks the first high-pressure chamber and the first chamber, and the fourth cone valve core blocks the fourth chamber and the low-pressure chamber.

3. The four-way cone valve according to claim 2, characterized in that, It also includes a first valve seat to a fourth valve seat, each of which has a cavity. 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 disposed inside the cavity of the second valve seat and is used to conduct and block the cavity of the second valve seat and the second chamber. The third valve seat is located in the third cavity, and the cavity of the third valve seat communicates with the third cavity. The third cone valve core is disposed in the cavity of the third valve seat and is used to conduct and block the cavity of the third valve seat and the low-pressure cavity. The fourth valve seat is located in the fourth cavity, and the cavity of the fourth valve seat is in communication with the fourth cavity. The fourth cone valve core is disposed in the cavity of the fourth valve seat and is used to conduct and block the cavity of the fourth valve seat and the low-pressure cavity.

4. The four-way cone valve according to claim 3, characterized in that, It also includes a first elastic element to a fourth elastic element, and the first valve seat further includes a first opening, the first opening being disposed on the side of the first valve seat adjacent to the first cavity, the first opening communicating with the cavity of the first valve seat and the first cavity, the first elastic element being 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 member 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. The third valve seat further includes a third opening, which is located on the side of the third valve seat adjacent to the third cavity. The third opening connects the cavity of the third valve seat and the third cavity. The third elastic element is connected between the bottom wall of the cavity of the third valve seat and the third cone valve core, so that the third cone valve core blocks the third opening. The fourth valve seat further includes a fourth opening, which is located on the side of the fourth valve seat adjacent to the fourth cavity. The fourth opening connects the cavity of the fourth valve seat and the fourth cavity. The fourth elastic element is connected between the bottom wall of the cavity of the fourth valve seat and the fourth cone valve core, so that the fourth cone valve core blocks the fourth opening.

5. The four-way cone valve according to claim 3, 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. The third cone valve core has a third peripheral wall surface and a fifth side surface and a sixth side surface that are axially opposite to the second valve core. The third peripheral wall surface contacts the peripheral wall surface of the cavity of the third valve seat. The third cone valve core also includes at least one third connecting hole that penetrates the fifth side surface and the sixth side surface. The fourth cone valve core has a fourth peripheral wall surface and a seventh side surface and an eighth side surface that are axially opposite to the second valve core. The fourth peripheral wall surface contacts the peripheral wall surface of the cavity of the fourth valve seat. The fourth cone valve core also includes at least one fourth connecting hole that penetrates the seventh side surface and the eighth side surface.

6. The four-way cone valve according to claim 5, 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. The second protrusion is located within the second cavity and adjacent to the second cone valve core. The second valve core includes a third protrusion located within the low-pressure cavity. A first end of the third protrusion is adjacent to the third cone valve core, and a second end of the third protrusion is adjacent to the fourth cone valve core. In the first 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; the second end of the third protrusion abuts against the fourth cone valve core, so that the fourth cone valve core connects the low-pressure cavity and the fourth cavity. In the second 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, and the first end of the third protrusion abuts against the third cone valve core, so that the third cone valve core connects the low-pressure cavity and the fourth cavity.

7. The four-way cone 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.

8. The four-way cone valve according to claim 1, characterized in that, It also includes a first connector and a second connector. 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. The first connecting part is connected to the second end of the first valve core, the second connecting part is connected to the second end of the second valve core, and the first mating part is connected to the second mating part, so that one of the first connecting member and the second connecting member rotates, thereby driving the other of the first connecting member and the second connecting member to rotate, and the rotation direction of the first connecting member is opposite to the rotation direction of the second connecting member.

9. The four-way cone valve according to claim 8, characterized in that, It also includes a driving component, which includes a driving part connected to one of the first connecting member and the second connecting member to drive one of the first connecting member and the second connecting member to rotate.

10. A hydraulic system, characterized in that, The device includes a four-way cone valve and a hydraulic cylinder, wherein the four-way cone valve is a four-way cone valve according to any one of claims 1-9, and the four-way cone valve is connected to the hydraulic cylinder to drive the piston rod of the hydraulic cylinder to move.

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