Water-based proportional reversing valve with independent valve port

Abstract

The utility model relates to the technical field of hydraulic control, and provides a water-based proportional directional valve with an independent valve port, the water-based proportional directional valve with the independent valve port comprises a first valve control module, a second valve control module and a valve controller, the first valve control module comprises a first liquid inlet valve core, a first proportional pilot valve, a first liquid return valve core and a first switch pilot valve; the second valve control module comprises a second liquid inlet valve element, a second proportional pilot valve, a second liquid return valve element and a second switch pilot valve. The first valve control module and the second valve control module are respectively connected with a controlled load; and the valve controller is respectively connected with the first proportional pilot valve, the first switch pilot valve, the second proportional pilot valve and the second switch pilot valve. According to the utility model, the direction and the flow of a working medium entering a controlled load can be accurately controlled, the controlled load is ensured to work smoothly and reliably, and the service life of related elements such as the controlled load is prolonged; and the reversing valve is simple in structure and high in response speed.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic control technology, specifically to a water-based proportional directional valve with an independent valve port. Background Technology

[0002] Currently, in coal mining, on-off proportional directional valves are used to control the movement of hydraulic supports. These valves only have two operating states: "fully open" and "fully closed," meaning the hydraulic supports can only move at a constant speed. This makes it difficult to precisely control the posture and push / slide of the hydraulic supports, and it also cannot achieve soft-start of the hydraulic cylinders, affecting their service life and reducing the quality of the working face support. Furthermore, it affects the straightness of the scraper conveyor, shortening its lifespan. In addition, existing proportional directional valves have complex structures and slow response times, resulting in poor control accuracy. Utility Model Content

[0003] The purpose of this utility model embodiment is to provide a water-based proportional directional valve with independent valve port, so as to at least solve the technical problem in the prior art that the proportional directional valve has poor control accuracy and affects the service life of controlled loads such as hydraulic cylinders.

[0004] To solve the above-mentioned technical problems, the embodiments of this utility model adopt the following technical solutions:

[0005] This utility model provides a water-based proportional directional valve with an independent valve port, comprising a first valve control module, a second valve control module, and a valve controller. The first valve control module includes a first inlet valve core, a first proportional pilot valve, a first return valve core, and a first on / off pilot valve. The second valve control module includes a second inlet valve core, a second proportional pilot valve, a second return valve core, and a second on / off pilot valve. The first and second valve control modules are also respectively connected to the controlled load.

[0006] The valve controller is connected to the first proportional pilot valve, the first on / off pilot valve, the second proportional pilot valve, and the second on / off pilot valve, respectively. The valve controller controls the on / off state and opening degree of the first proportional pilot valve or the second proportional pilot valve to control the on / off state and opening degree of the first inlet valve core or the second inlet valve core, thereby controlling the direction and flow rate of the working medium entering the controlled load. The valve controller also controls the on / off state of the first return valve core or the second return valve core by controlling the on / off state of the first on / off pilot valve or the second on / off pilot valve.

[0007] In some embodiments, the first inlet valve core has a first inlet control chamber, the first inlet port of the first valve control module is connected to the first inlet control chamber through a first damping hole, and the first inlet control chamber is also connected to the first proportional pilot valve chamber of the first proportional pilot valve.

[0008] The second inlet valve core has a second inlet control chamber. The second inlet port of the second valve control module is connected to the second inlet control chamber through a second damping hole. The second inlet control chamber is also connected to the second proportional pilot valve chamber of the second proportional pilot valve.

[0009] In some embodiments, the valve-independent water-based proportional directional valve further includes a valve body, which has an inlet, a return port, a first load interface, and a second load interface. The first inlet valve core, the first return valve core, the second inlet valve core, and the second return valve core are disposed within the valve body.

[0010] The liquid inlet is connected to the first liquid inlet control chamber and the second liquid inlet control chamber, respectively, and the liquid return port is connected to the first liquid return control chamber of the first liquid return valve core and the second liquid return control chamber of the second liquid return valve core, respectively.

[0011] In some embodiments, the valve body is provided with a common inlet pipe connected to the inlet port.

[0012] The common inlet pipeline is connected to the first end of the first inlet pipeline through the first damping hole, the second end of the first inlet pipeline is connected to the first inlet control chamber, and the first proportional pilot valve chamber of the first proportional pilot valve is connected to the first inlet pipeline.

[0013] The common inlet pipeline is connected to the first end of the second inlet pipeline through the second damping orifice, the second end of the second inlet pipeline is connected to the second inlet control chamber, and the second proportional pilot valve chamber of the second proportional pilot valve is connected to the second inlet pipeline.

[0014] In some embodiments, the valve body is provided with a first inlet valve sleeve, the first inlet valve core is movably installed in the first inlet valve sleeve through a first elastic element, the first inlet valve sleeve is provided with a first inlet valve port that cooperates with the first inlet control chamber, and the first inlet valve port is connected to the first load interface.

[0015] The valve body is provided with a first return valve sleeve, and the first return valve core is movably installed in the first return valve sleeve through a second elastic element. The first return valve sleeve is provided with a first return valve port that cooperates with the first return control cavity, and the first return valve port is connected to the first load interface.

[0016] In some embodiments, the valve body is provided with a second inlet valve sleeve, the second inlet valve core is movably installed in the second inlet valve sleeve by a third elastic element, the second inlet valve sleeve is provided with a second inlet valve port that cooperates with the second inlet control chamber, and the second inlet valve port is connected to the second load interface.

[0017] The valve body is provided with a second return valve sleeve, and the second return valve core is movably installed in the second return valve sleeve through a fourth elastic element. The second return valve sleeve is provided with a second return valve port that cooperates with the second return control cavity, and the second return valve port is connected to the second load interface.

[0018] In some embodiments, the first inlet valve core is connected to a first displacement sensor, and the second inlet valve core is connected to a second displacement sensor.

[0019] In some embodiments, the first proportional pilot valve and the second proportional pilot valve are normally closed valves, and the first switching pilot valve and the second switching pilot valve are normally open valves.

[0020] This utility model provides a water-based proportional directional valve with an independent valve port. It comprises a first valve control module, a second valve control module, and a valve controller. The first valve control module includes a first inlet valve core, a first proportional pilot valve, a first return valve core, and a first on / off pilot valve. The second valve control module includes a second inlet valve core, a second proportional pilot valve, a second return valve core, and a second on / off pilot valve. Both the first and second valve control modules are connected to a controlled load. The valve controller is connected to the first proportional pilot valve, the first on / off pilot valve, the second proportional pilot valve, and the second on / off pilot valve. The valve controller controls the on / off state and opening degree of the first or second proportional pilot valve to control the on / off state and opening degree of the first or second inlet valve core, thereby controlling the flow of the working medium into the controlled load. The valve controller also controls the on / off state of the first or second return valve core by controlling the on / off state of the first or second pilot valve. The valve-port independent water-based proportional directional valve can control the on / off state and opening degree of the inlet valve core in each valve control module through the proportional pilot valve set in each valve control module, thereby accurately controlling the direction and flow rate of the working medium entering the controlled load. At the same time, the on / off state of the return valve core in another valve control module can be controlled by the pilot valve in another valve control module, thus forming a complete working medium circuit, ensuring the smooth and reliable operation of the controlled load, and extending the service life of the controlled load and related components. In addition, the valve-port independent water-based proportional directional valve of this utility model embodiment has a simple structure and fast response speed, further improving the control accuracy of the directional valve. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the valve port independent type water-based proportional directional valve according to an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of the valve port independent type water-based proportional directional valve according to an embodiment of the present utility model;

[0024] Figure 3 for Figure 2 Partial cross-sectional view of an independent water-based proportional directional valve with a central valve port;

[0025] Figure 4 This is a partial pipeline diagram of the valve port independent type water-based proportional directional valve according to an embodiment of the present utility model.

[0026] Figure label:

[0027] 1-First valve control module; 11-First inlet valve core; 111-First inlet control chamber; 12-First proportional pilot valve; 13-First return valve core; 14-First switching pilot valve; 15-First damping orifice; 2-Second valve control module; 21-Second inlet valve core; 22-Second proportional pilot valve; 23-Second return valve core; 24-Second switching pilot valve; 25-Second damping orifice; 3-Valve body; 4-Proportional pilot valve assembly; 5-Switching pilot valve assembly; 61-First inlet valve sleeve; 611-First inlet valve port; 62-First elastic element; 63-First back nut; 64-First screw plug; 71-First return valve sleeve; 711-First return valve port; 72-Second elastic element; 73-Second back nut; 74-Second screw plug; 81-First displacement sensor; 82-Second displacement sensor;

[0028] 20 - Liquid tank; 101 - First liquid inlet channel, 102 - First liquid return channel, 103 - Second liquid inlet channel, 104 - Second liquid return channel, 105 - Common liquid inlet pipeline, 106 - First liquid inlet pipeline, 1061 - Second end of the first liquid inlet pipeline, 107 - Second liquid inlet pipeline, 1071 - Second end of the second liquid inlet pipeline. Detailed Implementation

[0029] Various embodiments and features of this utility model are described herein with reference to the accompanying drawings.

[0030] It should be understood that various modifications can be made to the embodiments described herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this invention will be apparent to those skilled in the art.

[0031] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0032] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0033] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0034] The above and other aspects, features and advantages of the present invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0035] Specific embodiments of the present invention will now be described with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of the present invention, which may be implemented in various ways. Well-known and / or repeated functions and structures have not been described in detail to avoid unnecessary or redundant details that could obscure the present invention. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of substantially any suitable detailed structures.

[0036] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0037] Figures 1 to 4 This diagram illustrates the structure of a valve-port independent water-based proportional directional valve according to an embodiment of the present invention. Figure 1 Solid lines represent the main pipelines through which the working medium flows, while dashed lines represent secondary pipelines. For example... Figures 1 to 4As shown in the figure, this utility model provides a valve-independent water-based proportional directional valve, including a first valve control module 1, a second valve control module 2, and a valve controller. The first valve control module 1 includes a first inlet valve core 11, a first proportional pilot valve 12, a first return valve core 13, and a first switching pilot valve 14. The second valve control module 2 includes a second inlet valve core 21, a second proportional pilot valve 22, a second return valve core 23, and a second switching pilot valve 24. The first valve control module 1 and the second valve control module 2 are also respectively connected to the controlled load.

[0038] The valve controller is connected to the first proportional pilot valve 12, the first switching pilot valve 14, the second proportional pilot valve 22, and the second switching pilot valve 24, respectively. The valve controller controls the opening and closing of the first proportional pilot valve 12 or the second proportional pilot valve 22 to control the opening and closing of the first inlet valve core 11 or the second inlet valve core 21, thereby controlling the direction and flow rate of the working medium entering the controlled load. The valve controller also controls the opening and closing of the first switching pilot valve 14 or the second switching pilot valve 24 to control the opening and closing of the first return valve core 13 or the second return valve core 23.

[0039] Specifically, the first valve control module 1 also includes a first liquid inlet, a first liquid return port, and a first load interface A. The first liquid inlet is connected to the first liquid inlet valve core 11. When the first liquid inlet valve core 11 is open, the working medium in the liquid tank 20 can enter the first liquid inlet valve core 11 through the first liquid inlet and enter the liquid chamber of the controlled load through the first load interface A, which is connected to the liquid chamber of the controlled load, to supply liquid to the controlled load. The first liquid return port is connected to the first liquid return valve core 13 and the liquid tank 20 respectively. When the first liquid return valve core 13 is open, the working medium in the controlled load can flow back to the first liquid return valve core 13 through the first load interface A and flow back to the liquid tank 20 through the first liquid return port, realizing the inflow and outflow of the working medium in the controlled load through the first load interface A.

[0040] Similarly, the second valve control module 2 also includes a second liquid inlet, a second liquid return port, and a second load interface B. The second liquid inlet is connected to the second liquid inlet valve core 21. When the second liquid inlet valve core 21 is open, the working medium in the liquid tank 20 can enter the second liquid inlet valve core 21 through the second liquid inlet and enter the liquid chamber of the controlled load through the second load interface B on the second valve control module 2 to supply liquid to the controlled load. The second liquid return port is connected to the second liquid return valve core 23 and the liquid tank 20 respectively. When the second liquid return valve core 23 is open, the working medium in the controlled load can flow back to the second liquid return valve core 23 through the second load interface B and flow back to the liquid tank 20 through the second liquid return port, realizing the inflow and outflow of the working medium in the controlled load through the second load interface B.

[0041] The working medium can be water-based, hydraulic oil, etc. In this embodiment, taking a hydraulic cylinder as the controlled load as an example, the working process of the valve port independent water-based proportional directional valve is specifically described. The hydraulic cylinder includes a rod chamber and a rodless chamber. The first valve control module 1 is connected to the rodless chamber through the first load interface A, and the second valve control module 2 is connected to the rod chamber through the second load interface B.

[0042] When the independent-port water-based proportional directional valve is in operation, for example, when the hydraulic cylinder needs to extend, fluid is supplied to the hydraulic cylinder through the first load port A, and the second load port B is used for fluid return from the hydraulic cylinder. The valve controller controls the first proportional pilot valve 12 to open proportionally. By controlling the opening degree of the first proportional pilot valve 12, the opening degree of the first inlet valve core 11 connected to the first proportional pilot valve 12 is controlled, supplying fluid to the rodless chamber of the hydraulic cylinder. At the same time, the valve controller controls the first switch pilot valve 14 to be in the closed state, that is, the return control chamber of the first return valve core 13 is closed. At this time, in order to ensure the reliable operation of the controlled load, the valve controller controls the second switch pilot valve 24 to open, opening the second return valve core 23 connected to the second switch pilot valve 24, so that the working medium in the rodless chamber of the hydraulic cylinder flows back to the second return valve core 23 through the second load port B, and then back to the liquid tank 20, realizing the return of fluid to the hydraulic cylinder and ensuring that the hydraulic cylinder can smoothly complete the extension action.

[0043] Similarly, when the hydraulic cylinder needs to retract, it returns fluid through the first load port A, allowing the working medium in the rodless chamber to flow back into the first return valve core 13, and then back to the fluid tank 20. The second load port B is used to supply fluid to the hydraulic cylinder. The valve controller controls the second proportional pilot valve 22 to open proportionally. By controlling the opening of the second proportional pilot valve 22, the opening of the second inlet valve core 21 connected to the second proportional pilot valve 22 is controlled, supplying fluid to the rod chamber of the hydraulic cylinder. At the same time, the valve controller controls the second... When the pilot valve 24 is closed, the return control chamber of the second return valve core 23 is closed. At this time, in order to ensure the reliable operation of the controlled load, the valve controller controls the first pilot valve 14 to open, which opens the first return valve core 13 connected to the first pilot valve 14. This allows the working medium to flow back from the rodless chamber of the hydraulic cylinder to the first return valve core 13 through the first load interface A connected to the first return valve core 13, and then back to the liquid tank 20, thereby realizing the return of the hydraulic cylinder and ensuring that the hydraulic cylinder can smoothly complete the extension action.

[0044] It is understandable that the first switch pilot valve 14 and the second switch pilot valve 24 can be used to control the opening and closing of the first return valve core 13 and the second return valve core 23. When the first return valve core 13 and the second return valve core 23 are working, they are in a fully open or fully closed state. The fully open state of the return valve core helps to reduce the return flow resistance, making the controlled load work more smoothly, and the cost of the switch pilot valve is low.

[0045] In other embodiments, a third proportional pilot valve can be used to control the on / off state and opening degree of the first return valve core 13, and a fourth proportional pilot valve can be used to control the on / off state and opening degree of the second return valve core 23, thereby enabling more precise control of the operation of the controlled load.

[0046] The valve-port independent water-based proportional directional valve provided in this embodiment of the invention comprises two valve control modules: a first valve control module 1 and a second valve control module 2. Each valve control module includes an inlet valve core, a proportional pilot valve, a return valve core, and a switching pilot valve. The first valve control module 1 and the second valve control module 2 are also connected to the controlled load. The proportional pilot valves in each valve control module can control the on / off state and opening degree of the inlet valve core, thereby precisely controlling the direction and flow rate of the working medium entering the controlled load. Simultaneously, the switching pilot valve in the other valve control module controls the on / off state of the return valve core in the other valve control module, forming a complete working medium circuit. This ensures the smooth and reliable operation of the controlled load (e.g., ensuring the complete extension and retraction of the hydraulic cylinder) and extends the service life of the controlled load and related components. Furthermore, the valve-port independent water-based proportional directional valve of this embodiment of the invention has a simple structure and fast response speed, further improving the control accuracy of the directional valve.

[0047] It is understood that the independent valve port of the water-based proportional directional valve in this embodiment of the present invention means that the control of the inlet valve core and the return valve core within the same valve control module is independent of each other, there is no mechanical linkage, the control is convenient, and the response speed is fast.

[0048] Independent-port water-based proportional directional valves are preferred for applications such as coal mine working faces where water-based media are used. These valves allow for precise control of the hydraulic cylinders in hydraulic supports, enabling accurate control of the support's posture and pushing / pushing action. They also facilitate soft-start of the hydraulic cylinders, extending their lifespan, improving the quality of face support, ensuring the straightness of the scraper conveyor, and reducing the overall lifespan of the conveyor.

[0049] In some embodiments, the first liquid inlet valve core 11 has a first liquid inlet control chamber 111, the first liquid inlet of the first valve control module 1 is connected to the first liquid inlet control chamber 111 through the first damping hole 15, and the first liquid inlet control chamber 111 is also connected to the first proportional pilot valve chamber of the first proportional pilot valve 12.

[0050] The second inlet valve core 21 has a second inlet control chamber. The second inlet of the second valve control module 2 is connected to the second inlet control chamber through the second damping hole 25. The second inlet control chamber is also connected to the second proportional pilot valve chamber of the second proportional pilot valve 22.

[0051] When the valve controller controls the first proportional pilot valve 12 to open, the first proportional pilot valve chamber of the first proportional pilot valve 12 is connected to the first liquid inlet control chamber 111. The working medium enters the first liquid inlet control chamber 111 through the first proportional pilot valve chamber. Due to the action of the first damping orifice 15, a pressure difference is formed between the first liquid inlet and the first liquid inlet control chamber 111. Thus, the pressure in the first liquid inlet control chamber 111 can be controlled by matching the flow relationship between the first damping orifice 15 and the first proportional pilot valve 12, thereby controlling the opening degree of the first liquid inlet valve core 11. At the same time, the valve controller controls the second switching pilot valve 24 of the second valve control module 2 to open, controlling the second return valve core 23 to open, so that the working medium in the controlled load can flow back to the liquid tank 20 through the second return valve core 23. When the first liquid inlet valve core 11 is open, the valve controller controls the first switching pilot valve 14 and the second proportional pilot valve 22 to close, so that the first return valve core 13 and the second liquid inlet valve core 21 are closed.

[0052] The process of the second inlet valve core 21 working in conjunction with the first return valve core 13 is similar to the process of the first inlet valve core 11 and the second return valve core 23 described above, and will not be repeated here.

[0053] like Figure 1 The first proportional pilot valve chamber of the first proportional pilot valve 12, the first return control chamber of the first return valve core 13, the first switch pilot valve chamber of the first switch pilot valve 14, the second proportional pilot valve chamber of the second proportional pilot valve 22, the second return control chamber of the second return valve core 23, and the second switch pilot valve chamber of the second switch pilot valve 24 are respectively connected to the liquid tank 20 through pipelines to facilitate the return of liquid from each component.

[0054] In some embodiments, such as Figure 2 and Figure 3 As shown, the independent-port water-based proportional directional valve also includes a valve body 3. The valve body 3 is provided with an inlet P, a return port R, a first load interface A, and a second load interface B. The first inlet valve core 11, the first return valve core 13, the second inlet valve core 21, and the second return valve core 23 are disposed within the valve body 3.

[0055] The liquid inlet P is connected to the first liquid inlet control chamber 111 of the first liquid inlet valve core 11 and the second liquid inlet valve core 21, respectively. The liquid return port R is connected to the first liquid return control chamber of the first liquid return valve core 13 and the second liquid return control chamber of the second liquid return valve core 23, respectively.

[0056] In this embodiment, the first valve control module 1 and the second valve control module 2 can be integrated into the same valve body 3. The first liquid inlet of the first valve control module 1 and the second liquid inlet of the second valve control module 2 are both liquid inlets P provided on the valve body 3. The first liquid return port of the first valve control module 1 and the second liquid return port of the second valve control module 2 are both liquid return ports R provided on the valve body 3. The first load interface A and the second load interface B are respectively connected to the controlled load.

[0057] like Figure 1 As shown, the inlet port P, the first inlet valve core 11, and the first load interface A are sequentially connected to form the first inlet channel 101, which can supply liquid to the controlled load; the first load interface A, the first return valve core 13, and the return port R ( Figure 1 (Not shown in the image) and liquid tank 20 are connected in sequence to form the first return channel 102, which allows the working medium in the controlled load to return; the inlet P, the second inlet valve core 21, and the second load interface B are connected in sequence to form the second inlet channel 103, which can supply liquid to the controlled load; the second load interface B, the second return valve core 23, and the return port R ( Figure 1 (Not shown in the image) and liquid tank 20 are connected in sequence to form the second return liquid channel 104, which can allow the working medium in the controlled load to return to the liquid.

[0058] When the controlled load performs the first action (e.g., when the hydraulic cylinder extends), the first inlet channel 101 and the second return channel 104 cooperate to form the first liquid circuit; when the controlled load performs the second action (e.g., when the hydraulic cylinder retracts), the second inlet channel 103 and the first return channel 102 cooperate to form the second liquid circuit, ensuring that the controlled load works smoothly.

[0059] like Figure 2 As shown, the first proportional pilot valve 12 and the second proportional pilot valve 22 can constitute the proportional pilot valve assembly 4, and the first switching pilot valve 14 and the second switching pilot valve 24 can constitute the switching pilot valve assembly 5. The proportional pilot valve assembly 4 and the switching pilot valve assembly 5 are arranged outside the valve body 3, making the water-based proportional directional valve structure more compact, occupying less space, and convenient for connection with the controlled load.

[0060] It is understandable that the quantity of liquid tank 20 may be only one; for ease of description, Figure 1Each relevant component is connected to a liquid tank 20. The interface on the water-based proportional directional valve that connects to the liquid tank 20 is the return port R. Different components of the water-based proportional directional valve can return to the liquid tank 20 through the same or different return ports R. For example, the first inlet valve core 11 and the second return valve core 13 return liquid through the same return port R on the valve body 3.

[0061] In other embodiments, the first valve control module 1 and the second valve control module 2 can be a separate structure to facilitate the connection of the first valve control module 1 and the second valve control module 2 to the rodless chamber and the rod chamber of the hydraulic cylinder, respectively.

[0062] In some embodiments, such as Figure 4 As shown, the valve body 3 is provided with a common inlet pipe 105 connected to the inlet port P.

[0063] The common inlet pipeline 105 is connected to the first end of the first inlet pipeline 106 through the first damping hole 15, the second end 1061 of the first inlet pipeline is connected to the first inlet control chamber 111, and the first proportional pilot valve chamber of the first proportional pilot valve 12 is connected to the first inlet pipeline 106.

[0064] The common inlet pipeline 105 is connected to the first end of the second inlet pipeline 107 through the second damping hole 25, the second end 1071 of the second inlet pipeline is connected to the second inlet control chamber, and the second proportional pilot valve chamber of the second proportional pilot valve 22 is connected to the second inlet pipeline 107.

[0065] The common inlet pipeline 105, the first inlet pipeline 106, the second inlet pipeline 107, the inlet pipeline connected to the first proportional pilot valve chamber of the first proportional pilot valve 12, and the inlet pipeline connected to the second proportional pilot valve chamber of the second proportional pilot valve 22 can be integrally formed by casting within the valve body 3. The first damping orifice 15 and the second damping orifice 25 are respectively located on the upper and lower sides of the common inlet pipeline 105. Then, the first inlet pipeline 106 and the second inlet pipeline 107 are horizontally arranged and connected to the first inlet control chamber 111 and the second inlet control chamber, respectively. The first proportional pilot valve chamber of the first proportional pilot valve 12 is connected to the pipe body of the first inlet pipeline 106, and the first proportional pilot valve chamber of the second proportional pilot valve 22 is connected to the pipe body of the second inlet pipeline 107. The pipeline arrangement within the valve body 3 is reasonable, which facilitates the timely response of the inlet valve core to the proportional pilot valve. At the same time, it facilitates the formation of a pressure difference through the upper and lower first damping orifice 15 and the second damping orifice 25.

[0066] In some embodiments, such as Figure 3As shown, the valve body 3 is provided with a first inlet valve sleeve 61, and the first inlet valve core 11 is movably installed in the first inlet valve sleeve 61 through the first elastic element 62. The first inlet valve sleeve 61 is provided with a first inlet valve port 611 that cooperates with the first inlet control chamber 111. The first inlet valve port 611 is connected to the first load interface A.

[0067] The valve body 3 is provided with a first return valve sleeve 71. The first return valve core 13 is movably installed in the first return valve sleeve 71 through a second elastic element 72. The first return valve sleeve 71 is provided with a first return valve port 711 that cooperates with the first return control cavity. The first return valve port 711 is connected to the first load interface A.

[0068] One end of the first inlet valve sleeve 61 is fixed by the first back nut 63 and the first screw plug 64. The first inlet valve core 11 is movably installed inside the first inlet valve sleeve 61 and cooperates with the first inlet valve sleeve 61 to form the first inlet control chamber 111. The first elastic element 62 is connected between the first inlet valve sleeve 61 and the first screw plug 64. The first proportional pilot valve 12 is opened to open the first inlet valve port 611 on the first inlet valve sleeve 61, which is connected to the first load interface A. The flow of the working medium pushes the first inlet valve core 11 to move, thereby adjusting the opening degree of the first inlet valve port 611 and controlling the flow rate of the fluid entering the controlled load through the first load interface A. Similar to the structure of the first inlet valve core 11, one end of the first return valve sleeve 71 is fixed by the second back nut 73 and the second screw plug 74. The first return valve core 13 is movably installed in the first return valve sleeve 71 and cooperates with the first return valve sleeve 71 to form the first return control chamber. The second elastic element 72 is connected between the first return valve sleeve 71 and the second screw plug 74. The first switch pilot valve 14 is opened to enable the first return valve port 711 on the first return valve sleeve 71 to open and communicate with the first load interface A, so that the working medium in the controlled load flows back to the liquid tank 20 through the first load interface A.

[0069] Similarly, the valve body 3 is provided with a second inlet valve sleeve, the second inlet valve core 21 is movably installed in the second inlet valve sleeve through a third elastic element, the second inlet valve sleeve is provided with a second inlet valve port that cooperates with the second inlet control chamber, and the second inlet valve port is connected to the second load interface B;

[0070] The valve body 3 is provided with a second return valve sleeve. The second return valve core 23 is movably installed in the second return valve sleeve through a fourth elastic element. The second return valve sleeve is provided with a second return valve port that cooperates with the second return control cavity. The second return valve port is connected to the second load interface B.

[0071] The second inlet valve core 21 and the second return valve core 23 inside the valve body 3 have similar structural arrangements to the first inlet valve core 11 and the first return valve core 13, and will not be described in detail here.

[0072] Optionally, in this embodiment, each inlet valve core and return valve core adopts a cone valve structure, which can ensure sealing performance under zero opening conditions, is more suitable for high water-based working environments, effectively reduces internal leakage, and ensures the pressure and flow characteristics of the valve to meet the usage requirements of working conditions of water-based media in coal mines, and has a wide range of applications.

[0073] In some embodiments, such as Figure 2 and Figure 3 As shown, the first inlet valve core 11 is connected to a first displacement sensor 81, and the second inlet valve core 21 is connected to a second displacement sensor 82.

[0074] The first displacement sensor 81 and the second displacement sensor 82 are respectively connected to the valve controller. The displacement of the first inlet valve core 11 and the second inlet valve core 21 can be monitored in real time through the first displacement sensor 81 and the second displacement sensor 82. The valve controller adjusts the flow rate between the corresponding proportional pilot valve and the damping orifice (adjusting the output pressure of the proportional pilot valve) according to the displacement of the first inlet valve core 11 and the second inlet valve core 21 using PID closed-loop algorithm, etc., automatically matching the hydraulic balance relationship, matching the pressure of the inlet control chamber of the inlet valve core, and thus adjusting the opening of the inlet valve core and improving the response speed of the inlet valve core.

[0075] In some embodiments, the first proportional pilot valve 12 and the second proportional pilot valve 22 are normally closed valves, and the first switching pilot valve 14 and the second switching pilot valve 24 are normally open valves. Setting the first proportional pilot valve 12 and the second proportional pilot valve 22 as normally closed valves enables the hydraulic cylinder to self-lock upon power failure, reducing energy consumption and extending its service life. For example, when the hydraulic cylinder is stationary at a certain position, the valve controller can control the proportional pilot valve connected to the inlet valve core to self-lock upon power failure, preventing the working medium from continuing to flow in, thus achieving self-locking of the hydraulic cylinder position, ensuring reliable stationary position of the hydraulic cylinder, and making it more energy-efficient and reliable. Setting the first switching pilot valve 14 and the second switching pilot valve 24 as normally open valves can improve the response speed of the switching pilot valves, ensuring reliable return of the working medium and thus ensuring the complete and smooth operation of the controlled load. For example, when the first proportional pilot valve 12 opens to control the hydraulic cylinder to extend, the valve controller only needs to close the first switch pilot valve 14, while the second switch pilot valve 24 remains open. This forms a complete liquid circuit with the controlled load, making control convenient and quick, so that the controlled load can perform the corresponding actions in a timely manner.

[0076] In specific implementation, the specific types of the first proportional pilot valve 12, the first switching pilot valve 14, the second proportional pilot valve 22, and the second switching pilot valve 24 can be determined according to the actual working conditions, and this utility model does not specifically limit them. For example, the first proportional pilot valve 12, the first switching pilot valve 14, the second proportional pilot valve 22, and the second switching pilot valve 24 can all be set as normally closed valves or normally open valves.

[0077] The above description is merely a preferred embodiment of this utility model and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure involved in this utility model is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in this utility model.

[0078] Furthermore, although the operations are described in a specific order, this should not be construed as requiring these operations to be performed in the specific order shown or in a sequential order. Multitasking and parallel processing may be advantageous in certain environments. Similarly, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0079] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A water-based proportional directional valve with independent valve port, characterized in that, The system includes a first valve control module, a second valve control module, and a valve controller. The first valve control module includes a first inlet valve core, a first proportional pilot valve, a first return valve core, and a first on / off pilot valve. The second valve control module includes a second inlet valve core, a second proportional pilot valve, a second return valve core, and a second on / off pilot valve. Both the first and second valve control modules are also connected to the controlled load. The valve controller is connected to the first proportional pilot valve, the first on / off pilot valve, the second proportional pilot valve, and the second on / off pilot valve, respectively. The valve controller controls the on / off state and opening degree of the first proportional pilot valve or the second proportional pilot valve to control the on / off state and opening degree of the first inlet valve core or the second inlet valve core, thereby controlling the direction and flow rate of the working medium entering the controlled load. The valve controller also controls the on / off state of the first return valve core or the second return valve core by controlling the on / off state of the first on / off pilot valve or the second on / off pilot valve.

2. The valve port independent type water-based proportional directional valve according to claim 1, characterized in that, The first inlet valve core has a first inlet control chamber. The first inlet port of the first valve control module is connected to the first inlet control chamber through a first damping hole. The first inlet control chamber is also connected to the first proportional pilot valve chamber of the first proportional pilot valve. The second inlet valve core has a second inlet control chamber. The second inlet of the second valve control module is connected to the second inlet control chamber through a second damping hole. The second inlet control chamber is also connected to the second proportional pilot valve chamber of the second proportional pilot valve.

3. The valve port independent type water-based proportional directional valve according to claim 2, characterized in that, The independent-port water-based proportional directional valve further includes a valve body, which is provided with an inlet, a return port, a first load interface, and a second load interface. The first inlet valve core, the first return valve core, the second inlet valve core, and the second return valve core are disposed within the valve body. The liquid inlet is connected to the first liquid inlet control chamber and the second liquid inlet control chamber, respectively, and the liquid return port is connected to the first liquid return control chamber of the first liquid return valve core and the second liquid return control chamber of the second liquid return valve core, respectively.

4. The valve port independent type water-based proportional directional valve according to claim 3, characterized in that, The valve body is provided with a common inlet pipe connected to the inlet port. The common inlet pipeline is connected to the first end of the first inlet pipeline through the first damping hole, the second end of the first inlet pipeline is connected to the first inlet control chamber, and the first proportional pilot valve chamber of the first proportional pilot valve is connected to the first inlet pipeline. The common inlet pipeline is connected to the first end of the second inlet pipeline through the second damping orifice, the second end of the second inlet pipeline is connected to the second inlet control chamber, and the second proportional pilot valve chamber of the second proportional pilot valve is connected to the second inlet pipeline.

5. The valve port independent type water-based proportional directional valve according to claim 3, characterized in that, The valve body is provided with a first liquid inlet valve sleeve, and the first liquid inlet valve core is movably installed in the first liquid inlet valve sleeve through a first elastic element. The first liquid inlet valve sleeve is provided with a first liquid inlet valve port that cooperates with the first liquid inlet control chamber. The first liquid inlet valve port is connected to the first load interface. The valve body is provided with a first return valve sleeve, and the first return valve core is movably installed in the first return valve sleeve through a second elastic element. The first return valve sleeve is provided with a first return valve port that cooperates with the first return control cavity, and the first return valve port is connected to the first load interface.

6. The valve port independent type water-based proportional directional valve according to claim 3, characterized in that, The valve body is provided with a second inlet valve sleeve, and the second inlet valve core is movably installed in the second inlet valve sleeve through a third elastic element. The second inlet valve sleeve is provided with a second inlet valve port that cooperates with the second inlet control chamber. The second inlet valve port is connected to the second load interface. The valve body is provided with a second return valve sleeve, and the second return valve core is movably installed in the second return valve sleeve through a fourth elastic element. The second return valve sleeve is provided with a second return valve port that cooperates with the second return control cavity, and the second return valve port is connected to the second load interface.

7. The valve port independent type water-based proportional directional valve according to claim 1, characterized in that, The first inlet valve core is connected to a first displacement sensor, and the second inlet valve core is connected to a second displacement sensor.

8. The valve port independent type water-based proportional directional valve according to claim 1, characterized in that, The first proportional pilot valve and the second proportional pilot valve are normally closed valves, and the first switching pilot valve and the second switching pilot valve are normally open valves.

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