Hydraulic multi-way valve

Abstract

The present application relates to the technical fields of hydraulic valve, and particularly relates to a hydraulic multi-way valve. The hydraulic multi-way valve comprises a valve body, a valve core and an end cover. The valve body is internally formed with a pressure oil channel, a working oil channel and an oil return channel. The valve core is slidingly assembled in the valve body, and controls the on-off of the oil channels. The valve core extends out of the valve body at one end, and the outer circumferential surface of the end is formed with a protruding part. The end cover is fixed outside the valve body, and is arranged for the valve core. The end part of the valve core slidingly extends into the end cover. The end cover cooperates with the end part of the valve core to form a cavity. The protruding part separates the cavity into a first cavity and a second cavity. A driver is arranged for the cavity. The driver controls the liquid in and out of the first cavity and the second cavity. The valve core slides under the pressure difference between the first cavity and the second cavity. The technical problem that the valve core of the hydraulic multi-way valve in the prior art cannot be driven by a linear electric actuator with small driving force, or cannot be driven by a pilot hydraulic oil to realize the bidirectional driving of the valve core at one end of the valve core is solved.

Description

Technical Field

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

[0002] Currently, hydraulic transmission and control technology is widely used in various heavy equipment such as engineering machinery, agricultural machinery, and mobile machinery. Among them, hydraulic multi-way valves, as key hydraulic components, are widely used in various heavy equipment due to their good versatility and adaptability. They can control the operating speed and direction of various actuators such as cylinders and motors, and have excellent precision control and micro-motion characteristics.

[0003] like Figure 1 As shown, in the prior art, the hydraulic multi-way valve uses a valve core 2' that slides within the valve body 1'. The valve core 2' slides along the valve body 1' to uniformly control two working oil passages 12'. When the valve core 2' is in the neutral position, neither of the two working oil passages 12' is working. When the valve core 2' slides to the left to the left working position or to the right to the right working position, one of the two working oil passages 12' connects to the pressure oil passage 11' to achieve oil inlet, and the other working oil passage 12' connects to the return oil passage 13' to achieve oil return. Pilot chambers 3' are formed at both ends of the valve core 2', and two solenoid valves 4' control the oil inlet and outlet of the two pilot chambers 3' respectively. The working ports of the above-mentioned hydraulic multi-way valve are uniformly controlled and cannot operate independently, resulting in energy waste, limited adaptability, and low working efficiency.

[0004] To address the issues of low efficiency and poor adaptability of the aforementioned hydraulic multi-way valves, existing technologies have proposed hydraulic multi-way valves employing dual valve cores, enabling independent operation. For example... Figure 2 The hydraulic multi-way valve shown includes a valve body 1”, in which two valve cores are slidably mounted, namely a first valve core 21” and a second valve core 22”. The two valve cores are coaxially arranged. A first pilot chamber 31 is provided at the left end of the first valve core 21” away from the second valve core 22”. A second pilot chamber 32 is provided at the right end of the second valve core 22” away from the first valve core 21”. The first pilot chamber 31” is filled with pilot oil under the control of a first solenoid valve 41”. The pilot oil can push the first valve core 21” to slide to the right. The first valve core 21” is reset under the action of a first spring assembly 51. The second pilot chamber 32” is filled with pilot oil under the control of a second solenoid valve 42”. The pilot oil can push the second valve core 22” to slide to the left. The second valve core 22” is reset under the action of a second spring assembly 52”. The aforementioned hydraulic multi-way valve can control the working state of two working oil passages respectively through two valve cores. However, the pilot oil can only provide a force in one direction to the valve core. The valve core needs to be reset under the action of the spring assembly, and the valve core cannot move further in the other direction.

[0005] To address the problem of valve cores not being able to be driven bidirectionally, existing technologies have proposed flow control valve devices, such as the invention patent with application number CN201780034000.5, which discloses: the flow control valve device has a block, two valve cores, two actuators, and two force-applying mechanisms. The block, as an example of a housing, is a valve block and has at least one valve core hole. The valve core hole extends along a predetermined axis. The block has two tank ports, two supply / discharge ports, and two pump ports, all six of which open into the valve core hole. To switch the connection status of these six ports, two valve cores are inserted into one valve core hole. The first and second actuators are, for example, direct-acting electric actuators. These actuators have, for example, a ball screw consisting of a slider (nut) threaded onto a screw shaft. The screw shaft rotates via a servo motor, causing the slider to reciprocate in the axial direction. The sliders with this function are respectively fixed to the drive bodies of the first and second actuators. The aforementioned flow control valve device uses a linear electric actuator drive structure, which can drive the valve core to move in two directions. However, the linear electric actuator can only provide a limited amount of pilot force and cannot flexibly change the stroke and thrust of the valve core. Summary of the Invention

[0006] To address the technical problems in existing hydraulic multi-way valves where the valve core requires a linear electric actuator for driving (resulting in low driving force) or pilot hydraulic oil for bidirectional driving of the valve core from one end, this invention provides a hydraulic multi-way valve that solves these problems.

[0007] A hydraulic multi-way valve, comprising:

[0008] The valve body contains a pressure oil passage, a working oil passage, and a return oil passage.

[0009] A valve core is slidably assembled in the valve body. The valve core slides to control the opening and closing of the oil passages. One end of the valve core extends out of the valve body, and a protrusion is formed on the outer peripheral surface of the end.

[0010] An end cap is fixed to the body of the valve body. The end cap is designed for the valve core. The end of the valve core slides into the end cap. The end cap and the end of the valve core form a cavity. The protrusion divides the cavity into a first cavity and a second cavity.

[0011] An actuator is provided for the cavity, and the actuator controls the inflow and outflow of liquid into the first cavity and the second cavity of the cavity. The valve core can slide bidirectionally under the pressure difference between the first cavity and the second cavity.

[0012] The hydraulic multi-way valve of this invention features a valve core whose end extends into an end cap, forming a hydraulic cylinder-like structure. An actuator controls the pressure difference between the first and second chambers, thereby driving the valve core to slide reciprocally in both directions. Compared to a linear electric actuator driving the valve core, the hydraulic cylinder drive structure of this invention provides a greater driving force. Compared to a pilot hydraulic oil-driven valve core, the hydraulic cylinder drive structure of this invention allows for flexible changes in the valve core's stroke and thrust in both directions at one end, enabling precise control of the valve core's position. Furthermore, the actuator can be located on one side of the end cap; that is, the actuator and hydraulic cylinder structure can be concentrated at one end of the valve core to drive its bidirectional sliding. Moreover, since the valve core's end directly engages with the end cap to form a hydraulic cylinder-like structure, the pressure difference force can act directly on the valve core without requiring additional connecting structures, effectively simplifying the structure.

[0013] According to one embodiment of the present invention, there are two working oil passages and two valve cores, which are arranged for the working oil passages and are coaxially assembled.

[0014] According to one embodiment of the present invention, an inner cavity with an opening is formed inside the end cap, a valve sleeve is provided at the opening of the inner cavity, and the valve core extends into the valve sleeve to form the cavity between the valve core and the valve sleeve.

[0015] According to one embodiment of the present invention, a reset component is further included, the reset component being disposed within the end cap, the reset component acting on the valve core.

[0016] According to one embodiment of the present invention, the reset assembly includes a reset member and a connector, one end of the connector is connected to the valve core, the reset member is sleeved on the connector, one end of the reset member acts on the connector, and the other end of the reset member acts on the valve core.

[0017] According to one embodiment of the present invention, the actuator includes two solenoid valves, which respectively control the inflow and outflow of liquid into the first chamber and the second chamber.

[0018] According to one embodiment of the present invention, a regeneration oil passage is further included, through which the return oil of the working oil passage can flow to the pressure oil passage.

[0019] According to one embodiment of the present invention, the regeneration oil circuit is disposed in at least one of the valve cores. The regeneration oil circuit includes an internal oil passage disposed on the valve core. The valve core is also provided with an oil inlet and a regeneration oil port communicating with the internal oil passage. When the valve core slides to control the return of oil to the corresponding working oil passage, at least part of the returned oil can flow to the pressure oil passage in sequence through the oil inlet, the internal oil passage and the regeneration oil port.

[0020] According to one embodiment of the present invention, a control valve is further provided in the regeneration oil circuit, and the control valve controls the unidirectional flow of oil in the regeneration oil circuit.

[0021] According to one embodiment of the present invention, the valve core is further provided with an oil return port, which is connected to the internal oil passage. When oil returns to the corresponding working oil passage, part of the oil can return to the oil return passage through the oil return port.

[0022] Based on the above technical solution, the technical effects that the present invention can achieve are as follows:

[0023] 1. The hydraulic multi-way valve of the present invention features a valve core with its end extending into an end cover. The valve core, in conjunction with the end cover, forms a structure similar to a hydraulic cylinder. An actuator controls the pressure difference between the first and second chambers, thereby driving the valve core to slide reciprocally in two directions. Compared to a linear electric actuator driving the valve core, the hydraulic cylinder drive structure of the present invention provides a greater driving force. Compared to a pilot hydraulic oil-driven valve core, the hydraulic cylinder drive structure of the present invention allows for flexible changes in the valve core's stroke and thrust in two directions at one end of the valve core, enabling accurate control of the valve core's position. Furthermore, the actuator can be located on one side of the end cover; that is, the actuator and hydraulic cylinder structure can be concentrated at one end of the valve core to drive the valve core to slide bidirectionally. Further, the valve core's end directly engages with the end cover to form a structure similar to a hydraulic cylinder, allowing the pressure difference force to act directly on the valve core without the need for additional connecting structures, effectively simplifying the structure.

[0024] 2. The hydraulic multi-way valve of the present invention has two working oil passages and two corresponding valve cores. The two valve cores control the working state of the two working oil passages respectively. The two valve cores can operate independently, achieving separate control of the two working oil passages, resulting in strong adaptability and high working efficiency. Since the two valve cores are coaxially arranged, there is no need to add valve core cavities to the valve body. Without changing the number and processing method of valve core cavities, the two valve cores can still perform independent actions when assembled in the same valve core cavity. Furthermore, because the two valve cores are slidably assembled in the same valve core cavity, the drive structure can only be located at one end of the valve core. If a pilot hydraulic oil drive structure is used in the prior art, only unidirectional drive of the valve core can be achieved; or, if a linear electric actuator drive is used in the prior art, the pilot force is small, both leading to inaccurate control of the valve core's dynamics. However, using the hydraulic cylinder structure and driver described in this application, it can be located at one end of the valve core and drive the valve core to slide bidirectionally, resulting in good control performance.

[0025] 3. The hydraulic multi-way valve of the present invention is further provided with a reset component. When the driver is not working, the reset element of the reset component is in a compressed state and can act on the valve core to return the valve core to the neutral position.

[0026] 4. The hydraulic multi-way valve of the present invention is further provided with a regeneration oil circuit. The return oil from the working oil passage can flow to the pressure oil passage through the regeneration oil circuit to realize the regeneration and reuse of hydraulic oil. Taking the boom linkage as an example, one working oil passage is connected to the small chamber of the boom cylinder, and the other working oil passage is connected to the large chamber of the boom cylinder. When the boom descends, the driver controls the oil intake of the small chamber of the boom cylinder through the control valve core, and the oil return of the large chamber of the boom cylinder. In order to prevent the boom from descending too quickly and causing the small chamber of the boom cylinder to suck in cavitation, part of the return oil from the large chamber of the boom cylinder enters the regeneration oil circuit through the corresponding working oil passage, and then enters the small chamber of the boom cylinder, preventing the small chamber of the boom cylinder from sucking in cavitation. Furthermore, the regeneration oil circuit is located on the valve core, eliminating the need for machining the regeneration oil circuit on the valve body and avoiding interference with other oil passages; the sliding of the valve core can adjust the regeneration amount of the regeneration oil circuit and rationally distribute the flow rate without the need for additional adjustment structures, making the entire system more energy-efficient and effective; furthermore, a control valve is installed on the regeneration oil circuit to control the unidirectional flow of the oil in the regeneration oil circuit and prevent reverse flow.

[0027] 5. The hydraulic multi-way valve of the present invention is further provided with a return oil port on the valve core. The return oil port is connected to the internal oil passage on the valve core, so that part of the return oil entering the regeneration oil circuit can also be returned through the return oil port. The return oil speed is fast, which can ensure the rapid response of the driven structure (such as boom) and improve work efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a hydraulic multi-way valve in the prior art;

[0029] Figure 2 This is a schematic diagram of another hydraulic multi-way valve in the prior art;

[0030] Figure 3 This is a schematic diagram of the hydraulic multi-way valve of the present invention;

[0031] Figure 4 for Figure 3 Enlarged view of part A;

[0032] Figure 5 A schematic diagram showing the structure of the first valve core in conjunction with the valve sleeve and reset assembly;

[0033] Figure 6 for Figure 5 Cross-sectional view of the structure shown;

[0034] Figure 7 A schematic diagram showing the regeneration of return oil through the regeneration oil circuit inside the second valve core;

[0035] Figure 8 A schematic diagram showing the return oil through the oil passage inside the second valve core;

[0036] In the diagram: 1-Valve body; 11-Pressure oil passage; 12-Working oil passage; 13-Return oil passage; 2-Valve core; 21-First valve core; 211-First protrusion; 22-Second valve core; 221-Second protrusion; 222-Regeneration oil passage; 2221-Internal oil passage; 2222-Inlet; 2223-Regeneration oil port; 223-Return oil port; 3-End cap; 4-Actuator; 41-Solenoid valve; 5-Cavity; 51-First cavity; 52-Second cavity; 6-Valve sleeve; 61-First oil port; 62-Second oil port; 7-Reset assembly; 71-Reset component; 72-Connector; 73-Reset seat; 8-Control valve; 81-Cone valve core; 82-Elastic component; 83-Plug; 1'-Valve body; 11'-Pressure oil passage; 12'-Working oil passage; 13'-Return oil passage; 2'-Valve core; 3'-Pilot chamber; 4'-Solenoid valve; 1”-Valve body; 21”-First valve core; 22”-Second valve core; 31”-First pilot chamber; 32”-Second pilot chamber; 41”-First solenoid valve; 42”-Second solenoid valve; 51”-First spring assembly; 52”-Second spring assembly. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0040] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0041] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0042] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0043] like Figure 3-8As shown, this embodiment provides a hydraulic multi-way valve, which includes a valve body 1 and a valve core 2. Multiple oil passages are formed inside the valve body 1, and the valve core 2 is slidably assembled inside the valve body 1. The sliding of the valve core 2 controls the opening and closing of the oil passages inside the valve body 1.

[0044] The valve body 1 is block-shaped, and a valve core cavity is provided inside the valve body 1 for assembling the valve core 2. Multiple oil passages are also provided inside the valve body 1, and these multiple oil passages communicate with the valve core cavity. Specifically, the multiple oil passages include a pressure oil passage 11, a working oil passage 12, and a return oil passage 13. When the working oil passage 12 is connected to the pressure oil passage 11 under the control of the valve core 2, oil can be introduced; when the working oil passage 12 is connected to the return oil passage 13 under the control of the valve core 2, oil can be returned.

[0045] As a preferred technical solution in this embodiment, only one valve core cavity is provided in the valve body 1. The pressure oil passage 11 is connected to the pressure oil port P to introduce pressure oil. There are two working oil passages 12, which are arranged on both sides of the pressure oil passage 11. There are also two return oil passages 13, which are arranged on both sides of the two working oil passages 12.

[0046] Valve core 2 is assembled inside the valve core cavity of valve body 1. Valve core 2 is a rod-shaped body with a variable outer diameter. Valve core 2 is designed for the working oil passage 12. When there are two working oil passages 12, two valve cores 2 are configured, namely a first valve core 21 and a second valve core 22. The first valve core 21 and the second valve core 22 are coaxially assembled inside the valve core cavity. The first valve core 21 and the second valve core 22 independently control the working state of the two working oil passages 12. The outer ends of the first valve core 21 and the second valve core 22 extend out of the valve core cavity of valve body 1 and are provided with a drive structure. The drive structure can drive the corresponding valve core to slide along the valve core cavity.

[0047] As a preferred embodiment, a first protrusion 211 is formed on the outer peripheral surface of the end of the first valve core 21 extending out of the valve core cavity. The first protrusion 211 can extend into the end cap 3 connected to the valve body 1 to form a drive structure similar to a hydraulic cylinder. Specifically, the outer end of the first valve core 21 extends into the end cap 3 to form a cavity 5. The cavity 5 is divided into a first cavity 51 and a second cavity 52 by the first protrusion 211. By controlling the pressure difference between the first cavity 51 and the second cavity 52, the first valve core 21 can be pushed to slide along the valve core cavity. The drive structures of the second valve core 22 and the first valve core 21 are symmetrically arranged. A second protrusion 221 is formed on the outer peripheral surface of the end of the second valve core 22 extending out of the valve core cavity, and it also forms a drive structure similar to a hydraulic cylinder in conjunction with the corresponding end cap 3.

[0048] As a preferred embodiment, the second valve core 22 is further provided with a regeneration oil passage 222, through which the return oil from the working oil passage 12 corresponding to the second valve core 22 can be regenerated to the pressure oil passage 11. Specifically, the regeneration oil passage 222 includes an internal oil passage 2221 disposed inside the second valve core 22. The valve core 2221 is provided with an oil inlet 2222 and a regeneration oil port 2223, both of which are connected to the internal oil passage 2221. When the second valve core 22 slides along the valve core cavity to connect the corresponding working oil passage 12 with the return oil passage 13, the oil inlet 2222 connects to the working oil passage 12, and the regeneration oil port 2223 connects to the pressure oil passage 11. The return oil in the working oil passage 12 can enter the internal oil passage 2221 through the oil inlet 2222, and then enter the pressure oil passage 11 through the regeneration oil port 2223. At this time, if another working oil passage 12 is connected to the pressure oil passage 11, the return oil from the working oil passage 12 can be regenerated and supplied to the other working oil passage 12 via the regeneration oil passage 222.

[0049] Preferably, a control valve 8 is provided on the regeneration oil passage 222 to control the unidirectional flow of oil in the regeneration oil passage 222. Specifically, the internal oil passage 2221 on the second valve core 22 extends axially and has an opening at one end, which faces the first valve core 21. The control valve 8 is located at the opening and controls the opening and closing between the internal oil passage 2221 and the regeneration oil port 2223. The control valve 8 includes a cone valve core 81, an elastic element 82, and a plug 83. The plug 83 is detachably mounted at the opening of the internal oil passage 2221 of the second valve core 22. The cone valve core 81 is movably mounted on the plug 83 through the elastic element 82, and the cone valve core 81 can slide along the internal oil passage 2221. In the initial state, the cone valve core 81 can block the regeneration oil port 2223 and block the regeneration oil passage 222; when the return oil enters the internal oil passage 2221, under the action of oil pressure, the cone valve core 81 compresses the elastic element 82 to open the regeneration oil port 2223, and the return oil can realize regeneration. The elastic element 82 can be selected from, but is not limited to, a spring.

[0050] Preferably, the second valve core 22 is also provided with an oil return port 223, which is connected to the internal oil passage 2221. When the second valve core 22 slides along the valve core cavity to make the corresponding working oil passage 12 and the oil return passage 13 connected, the oil inlet 2222 is connected to the working oil passage 12, and the oil return port 223 is connected to the oil return passage 13, which can facilitate and quickly drain oil. With the setting of regeneration oil passage 222 and return oil port 223, taking the application of the hydraulic multi-way valve in the boom linkage of this embodiment as an example, the working oil passage 12 controlled by the first valve core 22 is connected to the small cavity of the boom cylinder, and the working oil passage 12 controlled by the second valve core 22 is connected to the large cavity of the boom cylinder. When the boom descends, oil enters the small cavity of the boom cylinder and oil returns to the large cavity of the boom cylinder. The return oil part of the working oil passage 12 controlled by the second valve core 22 enters the internal oil passage 2221 through the oil inlet 2222, and part of the oil flows to the return oil passage 13 through the return oil port 223, which can accelerate the boom descent and provide a fast response. Part of the oil is regenerated through the regeneration oil port 2223 to the pressure oil passage 11 and enters the large cavity of the boom cylinder, which can prevent the boom from descending too fast and causing the small cavity of the boom cylinder to suck in air. This can achieve a fast response of the boom and also prevent air sucking.

[0051] Two end caps 3 are fixed to the valve body 1, corresponding to the outer ends of the first valve core 21 and the second valve core 22, respectively. To ensure the sealing of the hydraulic cylinder-like drive structure formed at the ends of the two valve cores, a valve sleeve 6 is fitted at the opening of the end cap 3. The valve sleeve 6 cooperates with the sliding end of the valve core 2 to form a cavity 5. The protrusion on the valve core 2 divides the cavity 5 into a first cavity 51 and a second cavity 52. ​​Preferably, the valve sleeve 6 is provided with oil ports, namely a first oil port 61 and a second oil port 62. The first oil port 61 communicates with the first cavity 51, and the second oil port 62 communicates with the second cavity 52.

[0052] As a preferred technical solution in this embodiment, the hydraulic multi-way valve of this embodiment is further provided with an actuator 4. The actuator 4 is configured for the cavity 5 and is used to control the inlet and outlet of liquid in the first cavity 51 and the second cavity 52 corresponding to the cavity 5. Specifically, each actuator 4 includes two solenoid valves 41. One solenoid valve 41 is connected to the first oil port 61 corresponding to the first cavity 51, and the other solenoid valve 41 is connected to the second oil port 62 corresponding to the second cavity 52. ​​The two solenoid valves 41 control the inlet and outlet of liquid in the first oil port 61 and the second oil port 62, respectively.

[0053] As a preferred technical solution in this embodiment, in order to reset the valve core 2 when the actuator 4 is not working, a reset assembly 7 is also provided, which provides a reset force to the valve core 2. There are two sets of reset assemblies 7, which provide reset forces to the first valve core 21 and the second valve core 22, respectively. Specifically, the two sets of reset assemblies 7 are symmetrically assembled. Taking the installation of the reset assembly 7 acting on the first valve core 21 as an example, the reset assembly 7 is assembled inside the end cover 3. The reset assembly 7 includes a reset member 71, a connector 72, and a reset seat 73. The connector 72 is connected to the outer end of the first valve core 21. The reset member 71 and the reset seat 73 are sleeved on the connector 72. The two ends of the reset member 71 are limited by the two reset seats 73. One reset seat 73 is limited by the end of the connector 72 and the end cover 3, and the other reset seat 73 is limited by the valve sleeve 6 and the valve core 21. In the initial state, the first valve core 21 is in the neutral position, with its outer end face flush with the valve sleeve 6. The reset seat 73, located near the first valve core 21, simultaneously abuts against both the first valve core 21 and the valve sleeve 6, and the reset member 71 is in a pre-compressed state. When the first valve core 21 slides towards the second valve core 22, it drives the connecting member 72 and its limiting reset seat 73 to move. The other reset seat 73 is limited by the valve sleeve 6, and the reset member 71 is compressed. When the first valve core 21 slides away from the second valve core 22, it pushes the reset seat 73 against it to move. The other reset seat 73 is limited by the end cap 3, and the reset member 71 is compressed. Once the actuator 4 is not working, both valve cores can be reset under the action of the corresponding reset members 71, returning to the neutral position. The reset member 71 can be, but is not limited to, a spring.

[0054] In this embodiment, the hydraulic multi-way valve, without increasing the valve core cavity or changing its original processing method, allows the first and second valve cores to operate independently even when located within the same cavity. The drive structures for the first and second valve cores are located at one end of their respective assemblies, enabling bidirectional drive and a wide pilot force adjustment range. This makes the entire system more energy-efficient and flexible, better adaptable to changing load conditions. The second valve core includes a regeneration oil passage and a return port, ensuring rapid oil return to the corresponding working oil passage. Part of the returned oil is regenerated to another working oil passage, enabling energy reuse and preventing cavitation. The independent control of the first and second valve cores allows the second valve core to operate independently when the system load changes or the required regeneration amount varies, adjusting the regeneration amount according to system needs without affecting the operation of the first valve core.

[0055] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A hydraulic manifold valve characterized by, The utility model relates to a valve body (1) is formed with pressure oil channel (11), working oil channel (12) and back oil channel (13) in, valve core (2) is slidably assembled in valve body (1), valve core (2) sliding control oil channel between the on-off, valve core (2) one end protrudes valve body (1), and the outer peripheral surface of this end is formed with convex part, end cover (3) is fixed with end cover (3) outside valve body (1), end cover (3) is arranged to valve core (2), and the end of valve core (2) slides and protrudes into end cover (3), and end cover (3) cooperates with the end of valve core (2) and forms cavity (5), and the convex part separates cavity (5) into first cavity (51) and second cavity (52), driver (4) is arranged to cavity (5), and driver (4) controls the liquid in and out of the first cavity (51) and the second cavity (52) of cavity (5), and valve core (2) can slide bidirectionally under the pressure difference of the first cavity (51) and the second cavity (52). The utility model relates to a valve body (1) is formed with pressure oil channel (11), working oil channel (12) and back oil channel (13) in, valve core (2) is slidably assembled in valve body (1), valve core (2) sliding control oil channel between the on-off, valve core (2) one end protrudes valve body (1), and the outer peripheral surface of this end is formed with convex part, end cover (3) is fixed with end cover (3) outside valve body (1), end cover (3) is arranged to valve core (2), and the end of valve core (2) slides and protrudes into end cover (3), and end cover (3) cooperates with the end of valve core (2) and forms cavity (5), and the convex part separates cavity (5) into first cavity (51) and second cavity (52), driver (4) is arranged to cavity (5), and driver (4) controls the liquid in and out of the first cavity (51) and the second cavity (52) of cavity (5), and valve core (2) can slide bidirectionally under the pressure difference of the first cavity (51) and the second cavity (52). The utility model relates to a valve body (1) is formed with pressure oil channel (11), working oil channel (12) and back oil channel (13) in, valve core (2) is slidably assembled in valve body (1), valve core (2) sliding control oil channel between the on-off, valve core (2) one end protrudes valve body (1), and the outer peripheral surface of this end is formed with convex part, end cover (3) is fixed with end cover (3) outside valve body (1), end cover (3) is arranged to valve core (2), and the end of valve core (2) slides and protrudes into end cover (3), and end cover (3) cooperates with the end of valve core (2) and forms cavity (5), and the convex part separates cavity (5) into first cavity (51) and second cavity (52), driver (4) is arranged to cavity (5), and driver (4) controls the liquid in and out of the first cavity (51) and the second cavity (52) of cavity (5), and valve core (2) can slide bidirectionally under the pressure difference of the first cavity (51) and the second cavity (52). The utility model relates to a valve body (1) is formed with pressure oil channel (11), working oil channel (12) and back oil channel (13) in, valve core (2) is slidably assembled in valve body (1), valve core (2) sliding control oil channel between the on-off, valve core (2) one end protrudes valve body (1), and the outer peripheral surface of this end is formed with convex part, end cover (3) is fixed with end cover (3) outside valve body (1), end cover (3) is arranged to valve core (2), and the end of valve core (2) slides and protrudes into end cover (3), and end cover (3) cooperates with the end of valve core (2) and forms cavity (5), and the convex part separates cavity (5) into first cavity (51) and second cavity (52), driver (4) is arranged to cavity (5), and driver (4) controls the liquid in and out of the first cavity (51) and the second cavity (52) of cavity (5), and valve core (2) can slide bidirectionally under the pressure difference of the first cavity (51) and the second cavity (52). The utility model relates to a valve body (1) is formed with pressure oil channel (11), working oil channel (12) and back oil channel (13) in, valve core (2) is slidably assembled in valve body (1), valve core (2) sliding control oil channel between the on-off, valve core (2) one end protrudes valve body (1), and the outer peripheral surface of this end is formed with convex part, end cover (3) is fixed with end cover (3) outside valve body (1), end cover (3) is arranged to valve core (2), and the end of valve core (2) slides and protrudes into end cover (3), and end cover (3) cooperates with the end of valve core (2) and forms cavity (5), and the convex part separates cavity (5) into first cavity (51) and second cavity (52), driver (4) is arranged to cavity (5), and driver (4) controls the liquid in and out of the first cavity (51) and the second cavity (52) of cavity (5), and valve core (2) can slide bidirectionally under the pressure difference of the first cavity (51) and the second cavity (52). ​ ​ ​ 2. A hydraulic manifold as claimed in claim 1, wherein ​ 3. A hydraulic manifold as claimed in claim 2, wherein ​ 4. The hydraulic manifold as defined in claim 1, wherein ​ 5. A hydraulic manifold as defined in claim 4, wherein, ​ 6. A hydraulic directional control valve according to any one of claims 4-5, characterized in that The control valve (8) controls the one-way flow of oil on the regeneration oil path (222).

7. A hydraulic manifold as defined in claim 5, wherein The valve core (2) is further provided with an oil return port (223) in communication with the internal oil passage (2221), and part of the return oil can be returned to the oil return passage (13) through the oil return port (223) when the corresponding working oil passage (12) returns oil.

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