A portable monitoring type combined pilot oil source valve

Abstract

This invention relates to a portable monitoring-type combined pilot oil source valve, belonging to the field of hydraulic system control technology. It includes: a first housing, a second housing, a movable guide rod, and an elastic stacked cylinder. The second housing is fixedly connected to the first housing. The movable guide rod is axially movable within both the first and second housings, abutting against one end of a spring, the other end of which abuts against one end face of a sliding block. The elastic stacked cylinder is disposed within the first housing, with one end fixedly connected to the first housing and the other end fixedly connected to the other end face of the sliding block away from the spring. A limiting member is fixedly disposed within the first housing, contacting the outer peripheral wall of the elastic stacked cylinder. The limiting member is used to adjust the position of the movable guide rod in the axial direction. The beneficial effects of this invention are: the contact between the limiting member and the outer peripheral wall of the elastic stacked cylinder allows for adjustment of the axial position of the movable guide rod, improving the control accuracy of the pilot oil source valve.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic system control technology, and specifically relates to a portable monitoring type combined pilot oil source valve for achieving precise control of the oil source. Background Technology

[0002] In the fields of hydraulic transmission, industrial automation control, and hydraulic systems for construction machinery, precise control of the oil source pressure, flow rate, and on / off state is crucial for ensuring stable equipment operation and improving operational accuracy and efficiency. As a key actuator in oil source control, the pilot oil source valve's performance directly affects the response speed, control accuracy, and operational reliability of the entire hydraulic system. It is widely used in various hydraulic drive systems for equipment such as excavators, cranes, precision hydraulic machine tools, and industrial robots.

[0003] Currently, the main problems with existing pilot-operated oil source valves are: limited control accuracy and insufficient adaptability. Traditional pilot-operated oil source valves have relatively fixed control logic, often employing mechanical adjustment or simple electronic control methods. This results in low accuracy in regulating oil source pressure and flow, and makes it difficult to flexibly adapt to the operational needs of different equipment. In precision machining and high-end equipment fields where high oil source control accuracy is required, control errors in traditional valve assemblies can easily lead to a decrease in equipment operating accuracy, failing to meet the needs of high-end application scenarios. Summary of the Invention

[0004] This invention provides a portable monitoring type combined pilot oil source valve to solve the technical problem of low control accuracy of pilot oil source valves in the prior art. By having a limiting member contact the outer peripheral wall of the elastic stacked cylinder, the position of the moving guide rod in the axial direction can be adjusted, thereby improving the control accuracy of the pilot oil source valve.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A portable monitoring type combined pilot oil source valve, comprising:

[0007] First shell;

[0008] The second housing is fixedly connected to the first housing;

[0009] The movable guide rod is axially movable and is disposed in the first housing and the second housing. The movable guide rod abuts against one end of the spring, and the other end of the spring abuts against one end face of the sliding block.

[0010] An elastic stacked cylinder is disposed inside the first housing. One end of the elastic stacked cylinder is fixedly connected to the first housing, and the other end of the elastic stacked cylinder is fixedly connected to the other end face of the sliding block away from the spring.

[0011] The limiting member is fixedly installed inside the first housing. The limiting member contacts the outer peripheral wall of the elastic stacked cylinder. The limiting member is used to adjust the position of the moving guide rod in the axial direction.

[0012] During the movement of the guide rod in one axial direction or another axial direction, the position of the guide rod in the axial direction is adjusted by the contact between the limiting component and the outer peripheral wall of the elastic stacked cylinder.

[0013] Optionally, the elastic stacked cylinder has annular plates and a stacked plate assembly. The stacked plate assembly consists of multiple stacked plates and connects the annular plates located at both ends of the elastic stacked cylinder. The two annular plates are respectively welded to the first housing and the sliding block.

[0014] During the elongation of the elastic stacked cylinder, the limiting member is inserted between two adjacent stacked pieces outside the stacked assembly;

[0015] During the shrinkage of the elastic stacked cylinder, the limiting member is inserted between two adjacent stacked pieces outside the stacked assembly.

[0016] Optionally, each lamination of the stacked assembly has a drain port, which is used to connect the interior and exterior of the stacked assembly.

[0017] Optionally, the first housing is connected to the first fluid pipe, and a flow channel and a first fluid through hole are formed on the first housing, the flow channel being connected to the first fluid pipe and the first fluid through hole;

[0018] The second housing is connected to the second fluid pipe, and a second fluid through hole is opened on the second housing. The second fluid through hole is separated from the first fluid through hole by a seal.

[0019] Optionally, a first chamber is formed inside the first housing, and the first chamber is connected to a first fluid pipe and flow channel.

[0020] Optionally, a second chamber is provided inside the first housing, and the second chamber is connected to the first fluid passage, with the spring located inside the second chamber.

[0021] Optionally, a third chamber is formed within the first and second housings. The third chamber is separated from the first fluid passage by a seal and is connected to the second fluid passage.

[0022] Optionally, the movable guide rod has a flow channel inside, which connects to the second chamber and the second fluid passage.

[0023] Optionally, a fourth chamber is provided inside the second housing, the fourth chamber is connected to the second fluid pipe, and the fourth chamber 22 is separated from the second fluid through hole.

[0024] Optionally, the fourth chamber is separated from the second fluid passage by a seal.

[0025] The beneficial effects of this invention are:

[0026] 1. The movable guide rod of the present invention is axially movable and disposed within the first housing and the second housing. The movable guide rod abuts against the right end of the spring, and the left end of the spring abuts against the right end face of the sliding block. The elastic stacked cylinder is disposed within the first housing, with its left end fixedly connected to the first housing and its right end fixedly connected to the left end face of the sliding block. A limiting member is fixedly disposed within the first housing, contacting the outer peripheral wall of the elastic stacked cylinder. The limiting member is used to adjust the position of the movable guide rod in the axial direction. During the process of the movable guide rod moving to the right or left, the position of the movable guide rod in the axial direction is adjusted by the contact between the limiting member and the outer peripheral wall of the elastic stacked cylinder, thereby improving the control accuracy of the pilot oil source valve.

[0027] 2. The elastic stacked cylinder of the present invention has annular plates and a stacked plate assembly. The stacked plate assembly consists of multiple stacked plates, and the stacked plate assembly connects the annular plates located at the left and right ends of the elastic stacked cylinder. The two annular plates are respectively welded to the first housing and the sliding block. During the extension of the elastic stacked cylinder, a limiting member is inserted between two adjacent stacked plates outside the stacked plate assembly. During the retraction of the elastic stacked cylinder, the limiting member is inserted between two adjacent stacked plates outside the stacked plate assembly. The limiting member has a pin, which is inserted between two adjacent stacked plates outside the stacked plate assembly during the extension or retraction of the elastic stacked cylinder. This facilitates the adjustment of the sliding block's position in the axial direction, indirectly realizing the adjustment of the moving guide rod's position in the axial direction, and improving the control accuracy of the pilot oil source valve. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0030] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0031] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at point A;

[0032] Figure 4 This is a schematic diagram of the three-dimensional structure of the elastic stacked cylinder of the present invention;

[0033] Figure 5This is a schematic diagram of the working state structure of the present invention;

[0034] Figure 6 This is a schematic diagram of another working state structure of the present invention.

[0035] icon:

[0036] 1. First housing; 11. Flow channel; 12. First chamber; 13. First fluid through hole; 14. Second chamber; 2. Second housing; 21. Second fluid through hole; 22. Fourth chamber; 3. Moving guide rod; 31. Flow channel; 4. Elastic stacked cylinder; 41. Circular ring plate; 42. Stacked plate assembly; 43. Drain port; a. First fluid pipe; b. Limiting element; b1. Insert pin; c. Sliding block; d. Spring; e. Third chamber; f. Second fluid pipe; g. Seal. Detailed Implementation

[0037] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0038] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 limitations on this application.

[0039] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to welding, bolting, or riveting; they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] Example 1: As Figures 1-2As shown, this embodiment provides a portable monitoring type combined pilot oil source valve, including: a first housing 1, a second housing 2, a movable guide rod 3, and an elastic stacked cylinder 4. The second housing 2 is fixedly connected to the first housing 1. The movable guide rod 3 is axially movable and is disposed within the first housing 1 and the second housing 2. The movable guide rod 3 abuts against one end of the spring d (i.e., the right end of the spring d), and the other end of the spring d (i.e., the left end of the spring d) abuts against one end face of the sliding block c (i.e., the right end face of the sliding block c). The elastic stacked cylinder 4 is disposed within the first housing 1. One end (left end) of the elastic stacked cylinder 4 is fixedly connected to the first housing 1, and the other end (right end) of the elastic stacked cylinder 4 is fixedly connected to the other end face of the sliding block c away from the spring d (i.e., the left end face of the sliding block c).

[0042] The limiting member b is fixedly disposed inside the first housing 1. The limiting member b contacts the outer peripheral wall of the elastic stacked cylinder 4. The limiting member b is used to adjust the position of the moving guide rod 3 in the axial direction.

[0043] During the movement of the guide rod 3 in one axial direction (i.e., to the right) or another axial direction (to the left), the position of the guide rod 3 in the axial direction is adjusted by the contact between the limiting member b and the outer peripheral wall of the elastic stacked cylinder 4.

[0044] like Figure 4 As shown, the elastic stacked cylinder 4 has annular plates 41 and stacked plate assembly 42. The stacked plate assembly 42 is composed of multiple stacked plates. The stacked plate assembly 42 is connected to the annular plates 41 located at both ends of the elastic stacked cylinder 4. The two annular plates 41 are respectively welded to the first housing 1 and the sliding block c.

[0045] During the elongation of the elastic stacked cylinder 4, the limiting member b is inserted between two adjacent stacked pieces outside the stacked piece assembly 42.

[0046] During the shrinkage of the elastic stacked cylinder 4, the limiting member b is inserted between two adjacent stacked pieces outside the stacked piece assembly 42.

[0047] like Figures 3-4 As shown, the limiting member b has a pin b1. During the extension or contraction of the elastic stacked cylinder 4, the pin b1 is inserted between two adjacent stacked pieces outside the stacked piece assembly 42, which facilitates the adjustment of the position of the sliding block c in the axial direction, and indirectly realizes the adjustment of the position of the moving guide rod 3 in the axial direction.

[0048] In addition, each lamination of the lamination assembly 42 has a drain port 43, which is used to connect the interior and exterior of the lamination assembly 42.

[0049] Example 2: Based on Example 1, such as Figure 2As shown, the first housing 1 and the second housing 2 are connected by welding, and the weld between the first housing 1 and the second housing 2 can be ground. To replace parts, simply cut open the weld between the first housing 1 and the second housing 2 to replace the internal parts of the oil source valve.

[0050] The movable guide rod 3 is located in the third chamber e inside the first housing 1 and the second housing 2, and the movable guide rod 3 itself can move axially.

[0051] Spring d is located between sliding block c and moving guide rod 3. The function of spring d is to buffer the movement of moving guide rod 3 to the left when it moves to the left, and to buffer the movement of moving guide rod 3 to the right if sliding block c suddenly pushes spring d to the right when it moves to the right.

[0052] A sealing element g is provided on the outer peripheral wall of the sliding block c. The sealing element g on the sliding block c is used to separate the first chamber 12 and the second chamber 14.

[0053] On the outer peripheral walls of both the left and right sides of the movable guide rod 3, there are sealing elements g. The sealing element g on the left side of the movable guide rod 3 is used to separate the second chamber 14 and the third chamber e, and the sealing element g on the right side of the movable guide rod 3 is used to separate the third chamber e and the fourth chamber 22.

[0054] Specifically, the first housing 1 is connected to the first fluid pipe a, and a flow channel 11 and a first fluid through hole 13 are opened on the first housing 1. The flow channel 11 is connected to the first fluid pipe a and the first fluid through hole 13.

[0055] The second housing 2 is connected to the second fluid pipe f. A second fluid through hole 21 is opened on the second housing 2. The second fluid through hole 21 is separated from the first fluid through hole 13 by a sealing element g.

[0056] The first housing 1 has a first chamber 12, which is connected to the first fluid pipe a and the flow channel 11.

[0057] The first housing 1 has a second chamber 14, which is connected to the first fluid passage 13, and the spring d is located in the second chamber 14.

[0058] A third chamber e is formed inside the first housing 1 and the second housing 2. The third chamber e is separated from the first fluid passage 13 by a sealing element g, and the third chamber e is connected to the second fluid passage 21.

[0059] The movable guide rod 3 has a flow channel 31 inside, which connects to the second chamber 14 and the second fluid passage 21.

[0060] The second housing 2 has a fourth chamber 22, which is connected to the second fluid pipe f and is separated from the second fluid through hole 21 by a sealing element g.

[0061] Example 3: Based on Examples 1-2, such as Figure 5 As shown, during the process of pushing the moving guide rod 3 to the right, fluid is introduced into the first fluid pipe a. The fluid in the first fluid pipe a enters the first fluid through-hole 13 through the flow channel 11. The fluid in the first fluid pipe a also enters the elastic stacked cylinder 4. The fluid in the elastic stacked cylinder 4 pushes the sliding block c to the right. The sliding block c pushes the moving guide rod 3 to the right through the spring d. The fluid in the elastic stacked cylinder 4 flows into the first chamber 12 through the drain port 43. The fluid in the first chamber 12 also pushes the sliding block c to the right, causing the sliding block c to move to the right through the spring d. Spring d pushes the moving guide rod 3 to the right; at the same time, fluid is also introduced into the first fluid through hole 13. The fluid in the first fluid through hole 13 enters the second chamber 14. The fluid in the second chamber 14 also pushes the moving guide rod 3 to the right. Due to the rightward movement of the sliding block c, the volume of the second chamber 14 will decrease. The fluid in the second chamber 14 enters the third chamber e through the guide channel 31. The fluid in the third chamber e flows out from the second fluid through hole 21. The rightward movement of the moving guide rod 3 causes the fluid in the fourth chamber 22 to flow out from the second fluid pipe f.

[0062] During the rightward movement of the guide rod 3, both the first housing 1 and the second housing 2 are filled with fluid. Therefore, the sliding block c stops after moving to a certain position. The sliding block c indirectly causes the guide rod 3 to stop after moving to a certain position. The sliding block c indirectly achieves the adjustment of the position of the guide rod 3 moving to the right in the axial direction.

[0063] like Figure 6 As shown, during the process of pushing the moving guide rod 3 to the left, fluid is introduced into the second fluid pipe f, and the fluid enters the fourth chamber 22. The fluid in the fourth chamber 22 pushes the moving guide rod 3 to move to the left, and the volume of the second chamber 14 will decrease. The fluid in the second chamber 14 enters the third chamber e through the guide channel 31. The fluid in the third chamber e flows out from the second fluid through hole 21. The fluid in the second chamber 14 is also discharged through the first fluid through hole 13. At the same time, the fluid in the second chamber 14 flows out from the first fluid pipe a through the flow channel 11. As the moving guide rod 3 moves to the left, the spring d in the second chamber 14 pushes the sliding block c to move to the left. The fluid in the first chamber 12 flows into the first fluid pipe a through the drain port 43 and flows out. The fluid in the elastic stacked cylinder 4 also flows into the first fluid pipe a and flows out.

[0064] During the leftward movement of the guide rod 3, both the first housing 1 and the second housing 2 are filled with fluid. Therefore, the sliding block c stops after moving to a certain position. The sliding block c indirectly causes the guide rod 3 to stop after moving to a certain position, thus indirectly adjusting the position of the guide rod 3 moving to the left in the axial direction.

[0065] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A portable monitoring type combined pilot oil source valve, characterized in that, include: First shell (1); The second housing (2) is fixedly connected to the first housing (1); The movable guide rod (3) is axially movable and is disposed in the first housing (1) and the second housing (2). The movable guide rod (3) abuts against one end of the spring (d), and the other end of the spring (d) abuts against one end face of the sliding block (c). An elastic stacked cylinder (4) is disposed inside the first housing (1). One end of the elastic stacked cylinder (4) is fixedly connected to the first housing (1), and the other end of the elastic stacked cylinder (4) is fixedly connected to the other end face of the sliding block (c) away from the spring (d). The limiting member (b) is fixedly disposed inside the first housing (1). The limiting member (b) contacts the outer peripheral wall of the elastic stacked cylinder (4). The limiting member (b) is used to adjust the position of the moving guide rod (3) in the axial direction. During the process of the moving guide rod (3) moving in one axial direction or in another axial direction, the position adjustment of the moving guide rod (3) in the axial direction is achieved by the contact between the limiting member (b) and the outer peripheral wall of the elastic stacked cylinder (4); The elastic stacked cylinder (4) has annular plates (41) and stacked plate assembly (42). The stacked plate assembly (42) is composed of multiple stacked plates. The stacked plate assembly (42) connects the annular plates (41) located at both ends of the elastic stacked cylinder (4). The two annular plates (41) are respectively welded to the first housing (1) and the sliding block (c). During the elongation of the elastic stacked cylinder (4), the limiting member (b) is inserted between two adjacent stacked pieces outside the stacked piece assembly (42); During the shrinkage of the elastic stacked cylinder (4), the limiting member (b) is inserted between two adjacent stacked pieces outside the stacked piece assembly (42).

2. The portable monitoring type combined pilot oil source valve according to claim 1, characterized in that, Each lamination of the lamination assembly (42) has a drain port (43) for connecting the interior and exterior of the lamination assembly (42).

3. A portable monitoring type combined pilot oil source valve according to claim 1, characterized in that, The first housing (1) is connected to the first fluid pipe (a), and a flow channel (11) and a first fluid through hole (13) are opened on the first housing (1). The flow channel (11) is connected to the first fluid pipe (a) and the first fluid through hole (13). The second housing (2) is connected to the second fluid pipe (f), and a second fluid through hole (21) is opened on the second housing (2). The second fluid through hole (21) is separated from the first fluid through hole (13) by a seal (g).

4. A portable monitoring type combined pilot oil source valve according to claim 3, characterized in that, The first housing (1) has a first chamber (12) inside, and the first chamber (12) is connected to the first fluid pipe (a) and the flow channel (11).

5. A portable monitoring type combined pilot oil source valve according to claim 3, characterized in that, The first housing (1) has a second chamber (14) inside, which is connected to the first fluid through hole (13), and the spring (d) is located inside the second chamber (14).

6. A portable monitoring type combined pilot oil source valve according to claim 1, characterized in that, The first housing (1) and the second housing (2) have a third chamber (e) which is separated from the first fluid passage (13) by a sealing element (g) and is connected to the second fluid passage (21).

7. A portable monitoring type combined pilot oil source valve according to claim 6, characterized in that, The movable guide rod (3) has a flow channel (31) inside, which connects the second chamber (14) and the second fluid through hole (21).

8. A portable monitoring type combined pilot oil source valve according to claim 1, characterized in that, The second housing (2) has a fourth chamber (22) which is connected to the second fluid pipe (f) and is separated from the second fluid through hole (21).

9. A portable monitoring type combined pilot oil source valve according to claim 8, characterized in that, The fourth chamber (22) is separated from the second fluid passage (21) by a seal (g).

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