Multi-way valve device integrated with priority function
By designing a multi-way valve device with priority functions, adjusting the front compensation structure of the valve and reasonably configuring the valve core and cavity, the problems that are difficult to meet in the existing hydraulic system are solved, and the system simplification, space saving and functional diversification are achieved.
Patent Information
- Application Number
- CN202510547708.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2025-06-06
AI Technical Summary
In existing hydraulic systems, multiple valve devices with load-sensitive valves, priority valves and ordinary valves are needed, resulting in complex systems and compact spaces, making it difficult to meet the diversified functional needs of the entire machine.
Design a multi-way valve device with priority functions. By adjusting the front compensation structure of the valve, the two-position and two-way valve front compensation structure is adjusted to a two-position three-way structure, and the priority function is integrated. The flow distribution and control is achieved by reasonably configuring the priority valve core, control chamber, load feedback chamber and other structures.
It realizes the integration of priority functions, simplifies the hydraulic system structure, reduces space occupation, improves the flexibility and diversity of the whole machine, meets the diversified functional needs of the whole machine, and reduces costs.
Smart Images
Figure CN120100784A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of engineering machinery, in particular to a multi-way valve device with integrated priority function. Background Art
[0002] In the application of construction machinery, different actuators have different functional requirements. Some actuators have high control characteristics and need to be compensated by load-sensitive valves; some actuators need to take precedence over other actuators and require priority valves for flow distribution; and some actuators do not need either compensation or priority functions. In the current hydraulic system, all three may exist at the same time. At present, lightweighting of the entire machine is the trend of the industry, and the layout of the hydraulic system pipelines has long been quite compact. If a working joint module with a priority function can be added to the multi-way valve for pre-valve compensation without affecting the compensation characteristics of other working joint modules, through reasonable configuration, the purpose of a multi-way valve meeting three types of actions can be achieved, thereby simplifying the hydraulic system.
[0003] The priority function is a common function in the hydraulic system of construction machinery. It specifies the action sequence of the actuators. Its function is to ensure that the system oil can give priority to the action of key actuators under any working conditions through the distribution and control of flow, so as to meet the use requirements of the whole machine and avoid risks. Summary of the invention
[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a multi-way valve device with an integrated priority function and a simple structure and good effect.
[0005] The present invention is implemented with the following technical scheme: a multi-way valve device with integrated priority function, including a valve body, a valve channel is provided in the valve body, a priority valve core is placed in the valve channel, a priority spring is provided at one end of the priority valve core, the end provided with the priority spring is a load feedback cavity, the other end of the priority valve core is connected to a control cavity, a control oil channel with an open end is provided axially of the priority valve core, the open end of the control oil channel is connected to the control cavity through damping I, a steering cavity, a high-pressure oil inlet cavity and a lifting cavity are also provided in the valve channel; when the priority valve core is in the initial state, the cavity requiring priority action is connected to the high-pressure oil inlet cavity, the control oil channel is provided with a radial guide hole at the cavity of priority action, the cavity of priority action is connected to the load feedback cavity through damping II, and the feedback oil circuit of priority action is connected to the load feedback cavity through damping III.
[0006] Further, the valve channel is provided with a screw plug assembly and a cover plate assembly at both ends of the priority valve core, a load feedback cavity is formed between the screw plug assembly and the priority valve core, and a control cavity is formed between the cover plate assembly and the priority valve core.
[0007] The cavity of the priority action is the steering cavity. When the priority valve core is in the initial state, the steering cavity is connected to the high-pressure oil inlet cavity, and the lifting cavity is not connected to the high-pressure oil inlet cavity. After the priority valve core is stably shifted, the lifting cavity is connected to the high-pressure oil inlet cavity.
[0008] The priority valve core is provided with a protrusion I used in conjunction with the steering cavity and a protrusion II used in conjunction with the lifting cavity. In the initial position, the protrusion I is located in the steering cavity, the steering cavity is connected to the high-pressure oil inlet cavity, and the protrusion II is located between the lifting cavity and the high-pressure oil inlet cavity, and the lifting cavity and the high-pressure oil inlet cavity are not connected; after the priority valve core is displaced, the protrusion I is located in the steering cavity and shifts to the oil channel close to the steering cavity connected to the high-pressure oil inlet cavity, the distance between the protrusion I and the oil channel mouth is reduced, the flow rate between the steering cavity and the high-pressure oil inlet cavity is changed, the protrusion II is located in the lifting cavity, and the lifting cavity is connected to the high-pressure oil inlet cavity.
[0009] The control oil channel is provided with a radial through hole at the steering cavity, and the load feedback port of the steering mechanism is communicated with the load feedback cavity through damping.
[0010] The cavity of the priority action is the lifting cavity. When the priority valve core is in the initial state, the lifting cavity is connected with the high-pressure oil inlet cavity, and the steering cavity is not connected with the high-pressure oil inlet cavity. After the priority valve core is stably shifted, the steering cavity is connected with the high-pressure oil inlet cavity.
[0011] The priority valve core is provided with a protrusion at the high-pressure oil inlet chamber. In the initial position, the protrusion blocks the passage between the steering chamber and the high-pressure oil inlet chamber, the steering chamber and the high-pressure oil inlet chamber are not connected, the lifting chamber and the high-pressure oil inlet chamber are not blocked by the protrusion, and the lifting chamber and the high-pressure oil inlet chamber are connected; after the priority valve core is displaced, the protrusion shifts to the oil passage close to the lifting chamber connecting to the high-pressure oil inlet chamber, the distance between the protrusion and the oil passage mouth is reduced, the flow rate between the lifting chamber and the high-pressure oil inlet chamber is changed, the steering chamber and the high-pressure oil inlet chamber are not blocked by the protrusion, and the steering chamber and the high-pressure oil inlet chamber are connected.
[0012] The control oil passage is provided with a radial through hole at the cavity of the lifting cavity, and the load feedback port of the lifting mechanism is communicated with the load feedback cavity through damping.
[0013] The present invention has the following advantages: the multi-way valve device with integrated priority function of the present invention adjusts the pre-valve compensation structure of two positions and two ways to a two-position three-way structure by adjusting the form of the pre-valve compensation structure, and integrates the priority function; the structure requires a small space, has a high degree of integration, and is flexible in application, providing a modular solution belonging to the multi-way valve working group for the priority function requirements of the whole machine. At the same time, through integration, the pipe layout of the priority valve is eliminated, providing space for the optimization of the hydraulic system of the whole machine, and meeting the cost reduction requirements of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.
[0015] In the attached picture: Figure 1 It is a structural schematic diagram of the priority valve core of the present invention in an initial position; Figure 2 It is a schematic diagram of the structure after the priority valve core of the present invention is transposed; Figure 3 It is the hydraulic principle diagram of the present invention; Figure 4 It is a structural schematic diagram of the initial position of the preferred valve core structure after modification of the present invention; Figure 5 It is a schematic diagram of the structure of the preferred valve core after the structure is modified and transposed in the present invention; Figure 6 This is a hydraulic principle diagram of the modified valve core structure of the present invention; Figure 7 It is a schematic diagram of the overall structure of the present invention.
[0016] In the figure: 1, valve body, 2, priority valve core, 3, priority spring, 4, screw plug assembly, 5.1, damping I, 5.2, damping II, 5.3, damping III, 6, cover plate assembly, X, control chamber, CF, steering chamber, P, high-pressure oil inlet chamber, EF, lifting chamber, LS, load feedback chamber.
[0017] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.
[0019] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0021] like Figures 1 to 6A multi-way valve device with an integrated priority function is shown, comprising a valve body 1, wherein a valve channel is provided in the valve body 1, a priority valve core 2 is placed in the valve channel, a priority spring 3 is provided at one end of the priority valve core 2, the end provided with the priority spring 3 is connected to a load feedback cavity, the other end of the priority valve core 2 is connected to a control cavity, a control oil channel with an open end is axially provided on the priority valve core 2, the open end of the control oil channel is connected to the control cavity through a damping I, a steering cavity, a high-pressure oil inlet cavity and a lifting cavity are also provided in the valve channel; when the priority valve core 2 is in an initial state, the cavity requiring priority action is connected to the high-pressure oil inlet cavity, the control oil channel is provided with a radial through hole at the cavity of priority action, the cavity of priority action is connected to the load feedback cavity through a damping II 5.2, and the feedback oil circuit of the priority action is connected to the load feedback cavity through a damping III 5.3. The valve channel is provided with a screw plug assembly 4 and a cover plate assembly 6 at both ends of the priority valve core 2, respectively. A load feedback cavity is formed between the screw plug assembly 4 and the priority valve core 2, and a control cavity is formed between the cover plate assembly 6 and the priority valve core 2. The multi-way valve device with integrated priority function of the present invention comprises a valve body and a priority valve core. The priority valve core cooperates with the priority spring and is installed in the valve channel of the valve body. Then, the two ends are blocked by a screw plug assembly and a cover plate assembly respectively. The valve channel is provided with a control chamber X, a steering chamber CF (leading to a steering mechanism), a high-pressure oil inlet chamber P, a lifting chamber EF (leading to a lifting mechanism) and a load feedback chamber LS in sequence from left to right. Among them, the control chamber X is the space between the end face of the priority valve core and the cover plate assembly. The steering chamber CF, the high-pressure oil inlet chamber P, the lifting chamber EF and the load feedback chamber LS are arranged on the valve body. The priority spring and the load feedback chamber LS are arranged on the same side. At the same time, an axial control oil channel is provided inside the priority valve core. One end of the control oil channel is connected to the control chamber X through damping, and the other end of the control oil channel is cut off in the valve core. The control oil channel is provided with a radial through hole at the steering chamber CF or the lifting chamber EF. At the same time, the load The feedback chamber LS is also connected to the feedback oil circuit of the priority action system and the priority action chamber; taking the steering action as the priority action as an example, when in use, the high-pressure oil inlet chamber P first enters the steering chamber CF, and then is divided into two paths, one path enters the control chamber X through the control oil channel at the steering chamber CF, and the other path is connected to the load feedback chamber LS through the damping. Since the load feedback chamber LS is connected to the feedback oil circuit of the steering system, there is a pressure difference between the control chamber X and the load feedback chamber LS at both ends of the priority valve core. The action of the priority valve core is determined by comparing the pressure difference with the spring force of the priority spring, thereby realizing the function of the priority valve. This structure not only realizes the function of integrating the priority function into the multi-way valve working joint, but also requires a small space, and the conditions for borrowing load-sensitive multi-way valves with pre-valve compensation of other specifications are not strict, so that the functions of the multi-way valve working joint module are more diversified, meeting the diversified needs of the whole machine, and the application is more flexible.
[0022] The priority valve core of the present invention is provided with a control oil channel, and the lateral control oil channel part is processed with an internal thread, and the damper is installed therein, and the control oil channel is connected with the control chamber X through the damper. In the initial state, the high-pressure oil inlet chamber P is directly connected with the priority chamber, and the oil can directly enter the priority chamber. At the same time, the oil in the priority chamber is divided into two control oils, which respectively pass through the damper to reach the left end control chamber X and the right end load feedback chamber LS of the priority valve core. If the steering mechanism needs priority, the load feedback port LS1 of the steering mechanism is connected with the load feedback chamber LS through the damper. LS2 is the load feedback port of the lifting mechanism, and does not participate in the functional application of the structure in the case of steering priority.
[0023] like Figures 1 to 3A multi-way valve device with an integrated priority function is shown, in which the cavity of the priority action is a steering cavity. When the priority valve core 2 is in the initial state, the steering cavity is connected to the high-pressure oil inlet cavity, and the lifting cavity is not connected to the high-pressure oil inlet cavity. After the priority valve core 2 is stably shifted, the lifting cavity is connected to the high-pressure oil inlet cavity. The priority valve core 2 is provided with a protrusion I used in conjunction with the steering cavity and a protrusion II used in conjunction with the lifting cavity. In the initial position, the protrusion I is located in the steering cavity, and the steering cavity is connected to the high-pressure oil inlet cavity. The protrusion II is located between the lifting cavity and the high-pressure oil inlet cavity, and the lifting cavity and the high-pressure oil inlet cavity are not connected; after the priority valve core 2 is displaced, the protrusion I is located in the steering cavity and shifts to the oil channel close to the steering cavity connected to the high-pressure oil inlet cavity. The distance between the protrusion I and the oil channel port is reduced, and the opening of the steering cavity and the high-pressure oil inlet cavity becomes smaller, changing the flow between the steering cavity and the high-pressure oil inlet cavity. Although they are still connected, the flow rate passing through is small due to the throttling effect. The protrusion II is located in the lifting cavity, and the lifting cavity is connected to the high-pressure oil inlet cavity. The control oil channel is provided with a radial through hole at the steering cavity, and the load feedback port of the steering mechanism is connected to the load feedback cavity through damping. In addition, the damping of the present invention can select the optimal size according to actual conditions. The multi-way valve device with integrated priority function of the present invention, when the steering is in priority work, the priority valve core is in the initial position, the high-pressure oil inlet chamber P and the steering chamber CF are connected through the priority valve core, the control oil channel is provided with a radial through hole at the steering chamber CF, the steering chamber CF is connected with the control chamber X through the control oil channel, the steering chamber CF is connected with the load feedback chamber LS, the feedback oil circuit of the steering system is connected with the load feedback chamber LS, and damping is provided at the connection between the three parts and the load feedback chamber LS, wherein two protrusions are provided on the priority valve core, namely, protrusion I and protrusion II, protrusion I and protrusion II are located on both sides of the high-pressure oil inlet chamber, protrusion I is used to block the connection between the steering chamber and the high-pressure oil inlet chamber, protrusion II is used to block the connection between the lifting chamber and the high-pressure oil inlet chamber, the positions of protrusion I and protrusion II are changed by moving the priority valve core, the connection between the high-pressure oil inlet chamber and the steering chamber and the lifting chamber is switched, and at the same time, only one of protrusion I and protrusion II is used to block the high-pressure oil, ensuring that the steering chamber or the lifting chamber has high-pressure oil entering, and maintaining the stable operation of the system.
[0024] The specific principle of the multi-way valve device with integrated priority function of the present invention, when the steering mechanism is prioritized, lifting single action and steering action is as follows: When lifting single action, high pressure oil enters the control oil channel and load feedback chamber of the priority valve core from the steering chamber CF, and enters the control chamber X through the damping of the control oil channel. At this time, the steering mechanism does not move, and the load feedback oil circuit of the steering mechanism is connected to the oil tank, that is, LS1 is connected to T, so the oil in the load feedback chamber LS will flow back to the oil tank. In the flowing oil, a pressure difference is formed before and after the damping. When the pressure difference between the control chamber X at the left end of the priority valve core and the load feedback chamber LS at the right end is greater than the spring force of the priority spring, the priority valve core changes direction, and the high pressure oil enters the lifting chamber EF to control the lifting action. Assuming that the priority valve core is completely changed, the opening of the high pressure oil inlet chamber P and the steering chamber CF is sealed. At this time, the high pressure oil cannot be transmitted to the two ends of the priority valve core. The priority valve core is reset under the action of the priority spring. During the reset process, the high pressure oil inlet chamber P and the steering chamber CF are gradually connected, and the high pressure oil enters the two ends of the priority valve core again to control the reversal of the priority valve core. In this way, the priority valve core reversing position is in a state of dynamic balance, and the high-pressure oil inlet chamber P and the steering chamber CF retain a certain opening to provide the hydraulic pressure required for the priority valve core reversing. At the same time, part of the oil can still reach the steering mechanism, so that it can respond quickly when it moves.
[0025] In compound steering action, the steering mechanism load feedback oil circuit builds up pressure, which is transmitted to the load feedback chamber LS through the LS1 port. At this time, the pressure of the load feedback chamber LS increases. When the pressure difference between the control chamber X at the left end of the priority valve core and the load feedback chamber LS at the right end is less than the spring force of the priority spring, the priority valve core is reset, so that the opening to the lifting chamber EF is reduced and the opening to the steering chamber CF is increased. The structure thus realizes the distribution and control of the flow, thereby ensuring that the flow to the steering chamber CF stably meets the use requirements of the steering mechanism.
[0026] like Figures 4 to 6A multi-way valve device with an integrated priority function is shown, in which the cavity of the priority action is a lifting cavity. When the priority valve core 2 is in the initial state, the lifting cavity is connected to the high-pressure oil inlet cavity, and the steering cavity is not connected to the high-pressure oil inlet cavity. After the priority valve core 2 is stably shifted, the steering cavity is connected to the high-pressure oil inlet cavity. The priority valve core 2 is provided with a protrusion at the high-pressure oil inlet chamber. In the initial position, the protrusion blocks the passage between the steering chamber and the high-pressure oil inlet chamber, the steering chamber and the high-pressure oil inlet chamber are not connected, the lifting chamber and the high-pressure oil inlet chamber are not blocked by the protrusion, and the lifting chamber and the high-pressure oil inlet chamber are connected; after the priority valve core 2 is displaced, the protrusion is shifted to the oil passage close to the lifting chamber connected to the high-pressure oil inlet chamber, the distance between the protrusion and the oil passage mouth is reduced, the passage between the lifting chamber and the high-pressure oil inlet chamber is reduced, the flow between the lifting chamber and the high-pressure oil inlet chamber is changed, the flow through the lifting chamber and the high-pressure oil inlet chamber is reduced due to the throttling effect, the steering chamber and the high-pressure oil inlet chamber are not blocked by the protrusion, and the steering chamber and the high-pressure oil inlet chamber are connected. The control oil passage is provided with a diameter conduction hole at the chamber of the lifting chamber, and the load feedback port of the lifting mechanism is connected to the load feedback chamber through damping. The multi-way valve device with integrated priority function of the present invention adjusts its structure according to the change of priority order, so that lifting is the priority action. When the priority valve core is in the initial position, the high-pressure oil inlet chamber P and the lifting chamber EF are connected through the priority valve core, and the control oil channel is provided with a radial through hole at the lifting chamber EF. The lifting chamber EF is connected with the control chamber X through the control oil channel, and the lifting chamber EF is connected with the load feedback chamber LS. The feedback oil circuit of the lifting chamber EF is connected with the load feedback chamber LS, and damping is provided at the connection between the three parts and the load feedback chamber LS; the raised step of the priority valve core is changed, so that the high-pressure oil inlet chamber P in the initial position is communicated with the lifting chamber EF, but is separated from the steering chamber CF. Specifically, an axial protrusion is provided on the priority valve core, and most of the protrusion is located at the high-pressure oil inlet chamber. One end of the protrusion blocks the steering chamber CF and the high-pressure oil inlet chamber P, and the other end of the protrusion blocks the lifting chamber EF and the high-pressure oil inlet chamber P. Which end of the protrusion blocks is determined by the position of the priority valve core. In the modified structure, the priority order changes, and the lifting action controlled by the multi-way valve has a higher priority. Through the distribution and control of the flow, the lifting action is satisfied first, and the steering action is satisfied secondly. Therefore, the load feedback port LS2 of the lifting mechanism is connected to the load feedback chamber LS, so that the lifting load pressure can be fed back to the load feedback chamber LS. Among them, the working mode of the modified structure is the same as the original structure, except that the on-off relationship of the oil circuit is reversed, which will not be repeated.
[0027] The multi-way valve device with integrated priority function of the present invention designs a two-position three-way structure by adjusting the form of the pre-valve compensation structure, so that the priority function is integrated into the multi-way valve working link, the required space is small, and the conditions for borrowing load-sensitive multi-way valves with pre-valve compensation of other specifications are not strict; at the same time, the structure and modification of the present invention make the functions of the multi-way valve working link module more diversified, meet the needs of the diversification of the whole machine, and be more flexible in application; the application of the structure of the present invention can simplify the hydraulic system of the whole machine, provide space for optimizing the piping of the whole machine, and reduce costs.
[0028] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.
[0029] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present invention and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.
[0030] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.
Claims
1. A multi-way valve device with integrated priority function, characterized in that: The invention comprises a valve body (1), wherein a valve channel is provided in the valve body (1), a priority valve core (2) is placed in the valve channel, a priority spring (3) is provided at one end of the priority valve core (2), the end provided with the priority spring (3) is a load feedback cavity, the other end of the priority valve core (2) is connected to a control cavity, the priority valve core (2) is axially provided with a control oil channel with one end open, the open end of the control oil channel is connected to the control cavity via a damper I (5.1), and a steering cavity, a high-pressure oil inlet cavity and a lifting cavity are also provided in the valve channel; when the priority valve core (2) is in an initial state, a cavity requiring priority action is connected to the high-pressure oil inlet cavity, the control oil channel is provided with a radial guide hole at the cavity requiring priority action, the cavity requiring priority action is connected to the load feedback cavity via a damper II (5.2), and the feedback oil circuit of the priority action is connected to the load feedback cavity via a damper III (5.3).
2. A multi-way valve device with integrated priority function as claimed in claim 1, characterized in that: The valve channel is provided with a screw plug assembly (4) and a cover plate assembly (6) at both ends of the priority valve core (2), respectively; a load feedback cavity is formed between the screw plug assembly (4) and the priority valve core (2), and a control cavity is formed between the cover plate assembly (6) and the priority valve core (2).
3. A multi-way valve device with integrated priority function as claimed in claim 1, characterized in that: The cavity of the priority action is the steering cavity. When the priority valve core (2) is in the initial state, the steering cavity is connected to the high-pressure oil inlet cavity, and the lifting cavity is not connected to the high-pressure oil inlet cavity. After the displacement of the priority valve core (2) is stabilized, the lifting cavity is connected to the high-pressure oil inlet cavity.
4. A multi-way valve device with integrated priority function as claimed in claim 3, characterized in that: The priority valve core (2) is provided with a protrusion I used in conjunction with the steering cavity and a protrusion II used in conjunction with the lifting cavity. In the initial position, the protrusion I is located in the steering cavity, the steering cavity is connected to the high-pressure oil inlet cavity, and the protrusion II is located between the lifting cavity and the high-pressure oil inlet cavity, and the lifting cavity and the high-pressure oil inlet cavity are not connected. After the displacement of the priority valve core (2) is stabilized, the protrusion I is located in the steering cavity and shifted to the oil passage close to the steering cavity connected to the high-pressure oil inlet cavity, the distance between the protrusion I and the oil passage opening is reduced, and the flow rate between the steering cavity and the high-pressure oil inlet cavity is changed. The protrusion II is located in the lifting cavity, and the lifting cavity is connected to the high-pressure oil inlet cavity.
5. A multi-way valve device with integrated priority function as claimed in claim 3, characterized in that: The control oil channel is provided with a radial through hole at the steering cavity, and the load feedback port of the steering mechanism is communicated with the load feedback cavity through damping.
6. A multi-way valve device with integrated priority function as claimed in claim 1, characterized in that: The cavity of the priority action is a lifting cavity. When the priority valve core (2) is in an initial state, the lifting cavity is connected to the high-pressure oil inlet cavity, and the steering cavity is not connected to the high-pressure oil inlet cavity. After the displacement of the priority valve core (2) is stabilized, the steering cavity is connected to the high-pressure oil inlet cavity.
7. A multi-way valve device with integrated priority function as claimed in claim 6, characterized in that: The priority valve core (2) is provided with a protrusion at the high-pressure oil inlet chamber. In the initial position, the protrusion blocks the passage between the steering chamber and the high-pressure oil inlet chamber, the steering chamber and the high-pressure oil inlet chamber are not connected, the lifting chamber and the high-pressure oil inlet chamber are not blocked by the protrusion, and the lifting chamber and the high-pressure oil inlet chamber are connected. After the displacement of the priority valve core (2) is stabilized, the protrusion is shifted to the oil passage close to the lifting chamber and connected to the high-pressure oil inlet chamber, the distance between the protrusion and the oil passage opening is reduced, the flow rate between the lifting chamber and the high-pressure oil inlet chamber is changed, the steering chamber and the high-pressure oil inlet chamber are not blocked by the protrusion, and the steering chamber and the high-pressure oil inlet chamber are connected.
8. A multi-way valve device with integrated priority function as claimed in claim 6, characterized in that: The control oil passage is provided with a radial through hole at the cavity of the lifting cavity, and the load feedback port of the lifting mechanism is communicated with the load feedback cavity through damping.