A dual-channel multi-control hydraulic valve

Abstract

This invention provides a dual-path multi-control hydraulic valve, comprising: a housing, a first oil passage, a first oil passage control device, a second oil passage, a second oil passage control device, a first oil passage return port, a second oil passage return port, and a return master port; the first and second oil passages are symmetrically distributed inside one end of the housing; the first and second oil passage control devices are symmetrically distributed inside the housing, with the first oil passage control device communicating with the first oil passage and the second oil passage control device communicating with the second oil passage; the first and second oil passage control devices are cross-connected, and the second oil passage is cross-connected with the first oil passage control device; one end of the first oil passage return port is connected to the first oil passage control device, and one end of the second oil passage return port is connected to the second oil passage control device; the other ends of the first and second oil passage return ports are connected and connected to the return master port; the outlet end of the return master port is located inside the housing at an end away from the first and second oil passages.

Description

Technical Field

[0001] This invention relates to the field of hydraulic transmission technology, and in particular to a dual-channel multi-control hydraulic valve. Background Technology

[0002] Hydraulic transmission and control are widely used in engineering machinery, mining machinery, water conservancy projects, and aerospace equipment. In hydraulic transmission and control systems, hydraulic valves, as crucial control components, determine the performance and stability of the hydraulic transmission system.

[0003] Currently, the hydraulic control systems of concrete mixer trucks, delivery pumps, and concrete spraying machines used in engineering equipment widely adopt electro-hydraulic integrated control. However, electro-hydraulic integrated control systems are complex in design, difficult to maintain, prone to failure, and easily cause instability in equipment operation. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a dual-path multi-control hydraulic valve as the core control hydraulic component of a full hydraulic control system. This valve can replace the existing electro-hydraulic integrated control system with a full hydraulic control system, simplifying system design, reducing equipment production and maintenance costs, and improving the reliability and stability of equipment operation.

[0005] This invention provides a dual-path multi-control hydraulic valve, comprising: a housing, a first oil passage, a first oil passage control device, a second oil passage, a second oil passage control device, a first oil passage return port, a second oil passage return port, and a return master port; the first oil passage and the second oil passage are symmetrically distributed inside one end of the housing; the first oil passage control device and the second oil passage control device are symmetrically distributed inside the housing, and the first oil passage control device is connected to the first oil passage, and the second oil passage control device is connected to the second oil passage; the first oil passage and the second oil passage control device are cross-connected, and the second oil passage and the first oil passage control device are cross-connected; one end of the first oil passage return port is connected to the first oil passage control device, and one end of the second oil passage return port is connected to the second oil passage control device; the other ends of the first oil passage return port and the second oil passage return port are connected and connected to the return master port; the outlet end of the return master port is located inside the housing at one end away from the first oil passage and the second oil passage.

[0006] Furthermore, the shell is a cuboid.

[0007] Furthermore, the first oil circuit control device includes: a first internal control hole, a first external control hole, a first connecting hole, and a first control rod assembly. The first internal control hole is arranged parallel to the first oil circuit, and a first damping adjusting screw is installed in the first internal control hole. A first controllable damping hole is provided at the bottom of the first damping adjusting screw. The first external control hole is arranged parallel to the first internal control hole and is threadedly connected to the first sealing screw. One end of the first connecting hole is connected to the first oil circuit, and the other end is connected to the second oil circuit control device. The first control rod assembly is connected to the first external control hole and the first oil circuit return hole, and is threadedly connected to the third sealing screw.

[0008] Furthermore, the first control lever assembly includes: a first control cavity, a first valve core, a first valve core movable cavity, a first control lever, and a first control lever cavity; the first control lever moves between the first control cavity and the first control lever cavity, the first control lever is connected to the first valve core, the first valve core moves between the first valve core movable cavity and the first control lever cavity, and the first valve core movable cavity is filled with a first flexible adjusting member.

[0009] Furthermore, the first flexible adjustment element is made of spring or rubber.

[0010] Furthermore, the first valve core includes a cylindrical valve core rod and a conical valve core head, wherein the conical valve core head is connected to the first control rod.

[0011] Furthermore, the second oil circuit control device includes: a second inner control hole, a second outer control hole, a second connecting hole, and a second control rod assembly. The second inner control hole is arranged parallel to the second oil circuit, and a second damping adjusting screw is installed in the second inner control hole. A second controllable damping hole is provided at the bottom of the second damping adjusting screw. The second outer control hole is arranged parallel to the second inner control hole and is threadedly connected to the second sealing screw. One end of the second connecting hole is connected to the second oil circuit, and the other end is connected to the first oil circuit control device. The second control rod assembly is connected to the second outer control hole and the return hole of the second oil circuit, and is threadedly connected to the fourth sealing screw.

[0012] Furthermore, the second control lever assembly includes: a second control cavity, a second valve core, a second valve core movable cavity, a second control lever, and a second control lever cavity; the second control lever moves between the second control cavity and the second control lever cavity, the second control lever is connected to the second valve core, the second valve core moves between the second valve core movable cavity and the second control lever cavity, and the second valve core movable cavity is filled with a second flexible adjusting member.

[0013] Furthermore, the second flexible adjustment element is made of spring or rubber.

[0014] Furthermore, the second valve core includes a cylindrical valve core rod and a conical valve core head, wherein the conical valve core head is connected to the second control rod.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the symmetrical structure of two-way liquid inlet, oil circuit control and one-way total liquid return structure is suitable for hydraulic systems of concrete mixer trucks and hydraulic systems of concrete delivery pumps, which can simplify the design of existing systems, reduce failure rate and production cost, and improve the reliability of equipment operation. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a cross-sectional structural diagram of the dual-channel multi-control hydraulic valve according to an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures:

[0019] A1: First oil passage; A2: Second oil passage; K11: First connecting hole; K12: First internal control hole; K13: First external control hole; K21: Second connecting hole; K22: Second internal control hole; K23: Second external control hole; C10: First valve core moving cavity; C11: First control rod cavity; C12: First control cavity; C13: First oil passage return hole; C20: Second valve core moving cavity; C21: Second control rod cavity; C22: Second control cavity; C23: Second oil passage return hole; B1: First controllable damping hole; B2: Second controllable damping hole; T: Main return hole;

[0020] 1: Housing; 10: Third sealing screw; 11: First flexible adjusting element; 12: First valve core; 13: First control lever; 14: First damping adjusting screw; 15: First sealing screw; 20: Fourth sealing screw; 21: Second flexible adjusting element; 22: Second valve core; 23: Second control lever; 24: Second damping adjusting screw; 25: Second sealing screw. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limiting this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] like Figure 1 As shown, the present invention provides a dual-path multi-control hydraulic valve, including a housing 1, which is preferably a cuboid. Holes of different sizes are machined on the four sides F, G, H and I of the housing 1 to realize different corresponding control functions.

[0025] On surface F of housing 1, a first oil passage A1 and a second oil passage A2 are machined respectively; a first internal control hole K12 and a second internal control hole K22 are machined, and a first damping adjusting screw 14 and a second damping adjusting screw 24 are installed respectively. The lower ends of the first damping adjusting screw 14 and the second damping adjusting screw 24 are respectively machined with a first controllable damping hole B1 and a second controllable damping hole B2. A first external control hole K13 and a second external control hole K23 are machined, and the first external control hole K13 and the second external control hole K23 are respectively threadedly connected to a first sealing screw 15 and a second sealing screw 25. The first external control hole K13 and the second external control hole K23 communicate with the first control cavity C12 and the second control cavity C22 respectively, and also cross-connect with the second oil passage A2 and the first oil passage A1 respectively. The first connecting hole K11 and the second connecting hole K21 are connected to the first oil circuit A1 and the second oil circuit A2, respectively. At the same time, the first connecting hole K11 and the second connecting hole K21 are also cross-connected to the second control cavity C22 and the first control cavity C12, respectively.

[0026] On the G surface of the housing 1, a first valve core movable cavity C10, a first control rod cavity C11, and a first control cavity C12 are coaxially machined. The outer end of the first valve core movable cavity C10 has an internal thread for connection with a third sealing screw 10. The inner wall of the first valve core movable cavity C10 is smooth, and a first flexible adjusting member 11 is installed therein to support the first valve core 12. The inner walls of the first control rod cavity C11 and the first control cavity C12 are also smooth.

[0027] The second valve core movable cavity C20, the second control rod cavity C21, and the second control cavity C22 are coaxially machined on the H-surface of the housing 1. The outer end of the second valve core movable cavity C20 has an internal thread for connection with the fourth sealing screw 20. The inner wall of the second valve core movable cavity C20 is smooth, and a second flexible adjusting member 21 is installed within it to support the second valve core 22. The inner walls of the second control rod cavity C21 and the second control cavity C22 are also smooth.

[0028] A return fluid main hole T is machined on the I surface of the housing 1. The return fluid main hole T is connected to the first oil circuit return fluid hole C13 and the second oil circuit return fluid hole C23. The first oil circuit return fluid hole C13 and the second oil circuit return fluid hole C23 are respectively connected to the first control rod cavity C11 and the second control rod cavity C21.

[0029] The diameters of the first internal control hole K11 and the second internal control hole K21 are smaller than the diameters of the first external control hole K13 and the second external control hole K23. The diameters of the first valve core movable cavity C10 and the second valve core movable cavity C20 are larger than the diameters of the first control rod cavity C11 and the second control rod cavity C21. The diameter of the total return hole T is larger than the diameters of the first oil circuit return hole C13 and the second oil circuit return hole C23.

[0030] The working principle and process of this invention are as follows:

[0031] (1) Oil enters the first oil circuit A1 and cross-external control is achieved through the second oil circuit A2: the first damping adjusting screw 14 and the first controllable damping hole B1 are closed, the first sealing screw 15 blocks the first external control hole K13, and the second damping adjusting screw 24 and the second controllable damping hole B2 are opened; the external control pressure oil enters the first control chamber C12 through the second controllable damping hole B2 and the first external control hole K13, the pressure oil pushes the first control rod 13 to the left, the first control rod 13 pushes the first valve core 12 to the left, connecting the first valve core movable chamber C10 and the first control rod chamber C11, and the pressure oil of the first oil circuit A1 flows to the return oil hole T through the first valve core movable chamber C10 and the first oil circuit return hole C13.

[0032] (2) Oil enters the second oil circuit A2 and cross-external control is achieved through the first oil circuit A1: the second damping adjusting screw 24 and the second controllable damping hole B2 are closed, the second sealing screw 25 blocks the second external control hole K23, and the second sealing screw 25 and the second controllable damping hole B1 are opened; the external control pressure oil enters the second control chamber C22 through the first controllable damping hole B1 and the second external control hole K23, the pressure oil pushes the second control rod 23 to the left, the second control rod 23 pushes the second valve core 22 to the left, connecting the second valve core movable chamber C20 and the second control rod chamber C21, and the pressure oil of the second oil circuit A2 flows to the return oil hole T through the second valve core movable chamber C20 and the second oil circuit return hole C23.

[0033] (3) The first oil circuit A1 and the second oil circuit A2 are supplied with oil at the same time to achieve cross-internal control: the first sealing screw 15 seals the first external control hole K13, and the second sealing screw 25 seals the second external control hole K23. Oil from the first oil circuit A1 enters the second control chamber C22 through the first controllable damping hole B1 and the first external control hole K13. The pressure oil pushes the second control lever 23 to the right, and the second control lever 23 pushes the second valve core 22 to the right, connecting the second valve core movable chamber C20 and the second control lever chamber C21. The pressure oil from the second oil circuit A2 returns to the main return port T through the second valve core movable chamber C20 and the second oil circuit return hole C23. At the same time, oil from the second oil circuit A2 enters the second control lever chamber C12 through the second controllable damping hole B2 and the second external control hole K23. The pressure oil pushes the first control lever 13 to the left, and the first control lever 13 pushes the second valve core 12 to the left, connecting the first valve core movable chamber C10 and the first control lever chamber C11. The pressure oil from the first oil circuit A1 returns to the main return port T through the first valve core movable chamber C10 and the first oil circuit return hole C13.

[0034] (4) The first oil circuit A1 and the second oil circuit A2 are simultaneously supplied with oil to achieve independent external control: the first damping adjusting screw 14 and the first controllable damping hole B1 are closed, the first sealing screw 15 is opened, the external control oil enters the first external control hole K13 and the second control rod cavity C12, the pressure oil pushes the first control rod 13 to the left, the first control rod 13 pushes the first valve core 12 to the left, connecting the first valve core movable cavity C10 and the first control rod cavity C11, and the pressure oil of the first oil circuit A1 returns to the total return oil hole T through the first valve core movable cavity C10 and the first oil circuit return hole C13. Simultaneously, the second damping adjusting screw 24 and the second controllable damping hole B2 are closed, and the second sealing screw 25 is opened. External control oil enters the second external control hole K23 and the second control chamber C22. The pressure oil pushes the second control rod 23 to the right, and the second control rod 23 pushes the second valve core 22 to the right, connecting the second valve core movable chamber C20 and the second control rod chamber C21. The pressure oil of the second oil circuit A2 returns to the main return oil hole T through the second valve core movable chamber C20 and the second oil circuit return hole C23.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dual-way multi-control hydraulic valve, characterized in that, include: The housing (1) comprises a first oil passage (A1), a first oil passage control device, a second oil passage (A2), a second oil passage control device, a first oil passage return hole (C13), a second oil passage return hole (C23), and a return main hole (T). The first oil passage (A1) and the second oil passage (A2) are symmetrically distributed at one end of the housing (1). The first oil passage control device and the second oil passage control device are symmetrically distributed inside the housing (1), and the first oil passage control device is connected to the first oil passage (A1), and the second oil passage control device is connected to the second oil passage (A2). The first oil passage (A1) is cross-connected to the second control chamber (C22) of the second oil passage control device through the second external control hole (K23), and the second oil passage (A2) is connected to the first control chamber (C12) of the first oil passage control device through the first external control hole (K13). Cross-connected; one end of the first oil circuit return hole (C13) is connected to the first oil circuit control device, and one end of the second oil circuit return hole (C23) is connected to the second oil circuit control device; the other ends of the first oil circuit return hole (C13) and the second oil circuit return hole (C23) are connected and connected to the return main hole (T); the outlet end of the return main hole (T) is located inside the housing (1) at one end away from the first oil circuit (A1) and the second oil circuit (A2).

2. The dual-channel multi-control hydraulic valve according to claim 1, characterized in that, The shell (1) is a cuboid.

3. The dual-channel multi-control hydraulic valve according to claim 1, characterized in that, The first oil circuit control device includes: a first internal control hole (K12), a first external control hole (K13), a first connecting hole (K11), and a first control rod assembly. The first internal control hole (K12) is arranged parallel to the first oil circuit (A1), and a first damping adjusting screw (14) is installed in the first internal control hole (K12). A first controllable damping hole (B1) is provided at the bottom of the first damping adjusting screw (14). The first external control hole (K13) is arranged parallel to the first internal control hole (K12) and is threadedly connected to the first sealing screw (15). One end of the first connecting hole (K11) is connected to the first oil circuit (A1), and the other end is connected to the second oil circuit control device. The first control rod assembly is connected to the first external control hole (K13) and the first oil circuit return hole (C13), and is threadedly connected to the third sealing screw (10).

4. The dual-channel multi-control hydraulic valve according to claim 3, characterized in that, The first control lever assembly includes: a first control cavity (C12), a first valve core (12), a first valve core movable cavity (C10), a first control lever (13), and a first control lever cavity (C11); the first control lever (13) moves between the first control cavity (C12) and the first control lever cavity (C11), the first control lever (13) is connected to the first valve core (12), the first valve core (12) moves between the first valve core movable cavity (C10) and the first control lever cavity (C11), and the first valve core movable cavity (C10) is filled with a first flexible adjusting member (11).

5. The dual-channel multi-control hydraulic valve according to claim 4, characterized in that, The first flexible adjustment element (11) is made of spring or rubber.

6. The dual-channel multi-control hydraulic valve according to claim 4, characterized in that, The first valve core (12) includes a cylindrical valve core rod and a conical valve core head, wherein the conical valve core head is connected to the first control rod (13).

7. The dual-channel multi-control hydraulic valve according to claim 1, characterized in that, The second oil circuit control device includes: a second inner control hole (K22), a second outer control hole (K23), a second connecting hole (K21), and a second control lever assembly. The second inner control hole (K22) is arranged parallel to the second oil circuit (A2), and a second damping adjusting screw (24) is installed in the second inner control hole (K22). A second controllable damping hole (B2) is provided at the bottom of the second damping adjusting screw (24). The second outer control hole (K23) is arranged parallel to the second inner control hole (K22) and is threadedly connected to the second sealing screw (25). One end of the second connecting hole (K21) is connected to the second oil circuit (A2), and the other end is connected to the first oil circuit control device. The second control lever assembly is connected to the second outer control hole (K23) and the second oil circuit return hole (C23), and is threadedly connected to the fourth sealing screw (20).

8. The dual-channel multi-control hydraulic valve according to claim 7, characterized in that, The second control lever assembly includes: a second control cavity (C22), a second valve core (22), a second valve core movable cavity (C20), a second control lever (23), and a second control lever cavity (C21); the second control lever (23) moves between the second control cavity (C22) and the second control lever cavity (C21), the second control lever (23) is connected to the second valve core (22), the second valve core (22) moves between the second valve core movable cavity (C20) and the second control lever cavity (C21), and the second valve core movable cavity (C20) is filled with a second flexible adjusting member (21).

9. The dual-channel multi-control hydraulic valve according to claim 8, characterized in that, The second flexible adjustment element (21) is made of spring or rubber.

10. The dual-channel multi-control hydraulic valve according to claim 8, characterized in that, The second valve core (22) includes a cylindrical valve core rod and a conical valve core head, wherein the conical valve core head is connected to the second control rod (23).

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