A hydraulic oil return joint valve body

Abstract

The present invention discloses a hydraulic oil return joint valve body, comprising: a cylindrical housing with a cavity inside, on the circumferential periphery of the housing, a plurality of oil inlet pipes penetrating into its interior are uniformly distributed, and each of the oil inlet pipes is arranged tangentially to the side wall of the housing; a oil return device is arranged in each of the oil inlet pipes for guiding hydraulic oil into the interior of the housing; an oil outlet pipe is arranged at the top of the housing for discharging the processed hydraulic oil; inside the housing, at a position below all the oil inlet pipes, a turntable is rotatably arranged, and a plurality of blades are uniformly distributed on the turntable, and an independent space is formed between two adjacent blades for separating and guiding the hydraulic oil from different oil inlet pipes to ensure that the oil return processes of each oil inlet pipe do not interfere with each other. Compared with the prior art, the present invention effectively manages the oil return process of the hydraulic actuator, ensures that the oil return of each oil inlet pipe does not interfere with each other, and at the same time realizes the purification and smooth discharge of the oil fluid.

Description

Technical Field

[0001] The present invention relates to the technical field of excavator components, and specifically to a hydraulic oil return union valve body. Background Art

[0002] In the hydraulic system of an excavator, hydraulic oil return is a crucial link. It is responsible for safely and efficiently guiding the remaining hydraulic oil after the actuator (such as a hydraulic cylinder or a hydraulic motor) has completed its work back to the hydraulic oil tank for reuse. Hydraulic oil return not only affects the stability and efficiency of the hydraulic system but also directly impacts the quality of the oil and the service life of the system.

[0003] After the actuator in the hydraulic system has completed its work, a portion of the hydraulic oil needs to be recycled. If this returned oil is not properly handled, it can not only cause waste of the oil but also lead to a series of problems such as oil contamination, unstable system pressure, and increased oil temperature. Therefore, designing a reasonable hydraulic oil return system is crucial for ensuring the normal operation of the hydraulic system.

[0004] In large or complex hydraulic systems, there are often multiple actuators and corresponding oil return paths. To ensure that each actuator can smoothly guide the returned oil back to the tank and avoid problems such as oil mixing and pressure fluctuations, an oil return union valve with multiple oil return channels needs to be designed. It can separately guide the returned oil from different actuators to the corresponding channels according to different oil return requirements, thereby achieving precise control and effective management of the oil return.

[0005] In the prior art, the external leakage oil return method means that the returned oil directly returns to the hydraulic oil tank through multiple return valves and external pipelines. However, the external leakage oil return requires more space and pipelines for layout, which not only increases the complexity and cost of the system but also may cause inconvenience to the maintenance and servicing of the system. Secondly, due to the need for additional pipelines and connectors, the external leakage oil return method is more prone to leakage problems, thus affecting the stability and safety of the system.

[0006] In addition to the external leakage oil return method, internal overflow oil return is also a commonly used oil return method in the prior art. However, hydraulic oil with different flow rates is likely to mix together during the internal overflow oil return process, resulting in deteriorated oil quality. Moreover, there may be pressure differences between adjacent oil return pipelines. If not properly handled, it may cause the phenomenon of oil backflow, further exacerbating the problems of oil contamination and deterioration.

[0007] In a hydraulic system, hydraulic oil not only plays a role in transmitting power and lubrication, but also shoulders the important tasks of cooling and cleaning the system. However, as the system operates, impurities such as dust and metal debris will gradually accumulate in the hydraulic oil. If these impurities are not removed in time, they will cause serious damage to the system. Therefore, sufficient attention must be paid to the purification problem of hydraulic oil. However, the existing oil return valves often have deficiencies in the purification of hydraulic oil and require additional filtering equipment to assist in completion.

[0008] In summary, although the oil return valves in the existing multiple oil return channels solve the oil return management problem to a certain extent, they still have disadvantages such as large occupied space of the external leakage oil return, easy leakage, poor quality of the internal overflow oil return, and possible backflow. At the same time, the problem of hydraulic oil purification also needs to be solved urgently. Therefore, it is necessary to provide a hydraulic oil return joint valve body to solve the problems raised in the above background technology. Summary of the Invention

[0009] To achieve the above object, the present invention provides the following technical solution: A hydraulic oil return joint valve body, comprising:

[0010] A cylindrical shell with a cavity inside, and a plurality of oil inlet pipes penetrating through to its interior are evenly distributed on the circumferential periphery of the shell, and each of the oil inlet pipes is tangent to the side wall of the shell;

[0011] An oil returner is arranged in each of the oil inlet pipes for guiding hydraulic oil into the interior of the shell; an oil outlet pipe is arranged at the top of the shell for discharging the processed hydraulic oil;

[0012] Inside the shell, at a position below all the oil inlet pipes, a turntable is rotatably arranged, and a plurality of blades are evenly distributed on the turntable. An independent space is formed between two adjacent blades for separating and guiding the hydraulic oil from different oil inlet pipes to ensure that the oil return processes of each oil inlet pipe do not interfere with each other.

[0013] Further, an output groove and an input groove which are staggered up and down are arranged in the oil returner, a valve body is slidably arranged up and down between the output groove and the input groove, and a spring is arranged above the valve body.

[0014] Further, a threaded sleeve is fixed above the oil returner, a screw plug is threadedly connected to the threaded sleeve, the spring is located between the valve body and the screw plug, and a connecting rod is also slidably connected between the valve body and the screw plug.

[0015] Further, an oil collecting cylinder is fixed at the center inside the shell, the turntable is rotatably sleeved on the outer wall of the oil collecting cylinder, side holes are opened on the side wall of the oil collecting cylinder at a position above the turntable, and the side holes are staggered from the positions of each oil inlet pipe.

[0016] Further, an oil suction pipe is fixed at a certain distance from the bottom inside the oil collecting cylinder. The oil suction pipe is communicated with an oil outlet pipe. A screw rod is rotatably arranged inside the oil suction pipe, and a driving motor is arranged at the top of the screw rod.

[0017] Further, a detachable oil filter is arranged at the bottom of the oil collecting cylinder.

[0018] Further, a rotating shaft is fixed on one side of the blade close to the oil collecting cylinder, and the rotating shaft rotatably penetrates to the bottom of the turntable;

[0019] A torsion spring is arranged at the bottom of the rotating shaft on the turntable, and a limiting block is arranged.

[0020] Further, an arc-shaped guide block is arranged at the position between two adjacent oil inlet pipes on the inner wall of the shell, and the guide block is attached to the upper and lower surfaces inside the shell.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] In the present invention, the device adopts a design with multiple oil inlet pipes evenly distributed. Each oil inlet pipe is tangent to the side wall of the shell, effectively avoiding mutual interference during the oil return process. The turntable and the blades separate and guide the hydraulic oil from different oil inlet pipes into independent spaces, further ensuring the independence of the oil return.

[0023] In the present invention, the blade has an initial position through the rotating shaft and the torsion spring, and can be assisted by the guide block during the rotation process, reducing the space formed between adjacent blades, avoiding the formation of cavities during the oil discharge process, and improving the smoothness of the oil discharge. The blade can return to the initial position after rotation, preparing for the entry of hydraulic oil next time and ensuring the continuity of the oil discharge.

[0024] In the present invention, the design of the oil suction pipe and the screw rod in the oil collecting cylinder can suck the hydraulic oil out of the oil collecting cylinder and discharge it into the fuel tank. At the same time, the oil filter at the bottom of the oil collecting cylinder adsorbs and filters impurities, realizing the purification of the oil. The oil filter adopts an adsorption filtration structure, which can not only effectively remove impurities but also does not affect the flow of the oil circuit. Description of the Drawings

[0025] Figure 1 It is a schematic structural diagram of a hydraulic oil return union valve body;

[0026] Figure 2 It is a schematic structural diagram of an oil returner;

[0027] Figure 3 It is a schematic internal structural diagram of a hydraulic oil return union valve body;

[0028] Figure 4 It is a schematic cross-sectional structural diagram of a hydraulic oil return union valve body;

[0029] In the figure: 1, housing; 2, inlet oil pipe; 3, oil returner; 31, input groove; 32, output groove; 33, valve body; 34, threaded sleeve; 35, screw plug; 36, connecting rod; 37, spring; 4, outlet oil pipe; 5, turntable; 51, blade; 52, rotating shaft; 53, guide block; 6, oil collecting cylinder; 61, side hole; 7, suction oil pipe; 8, screw; 9, drive motor; 10, oil filter. Specific implementation mode

[0030] Please refer to Figures 1-4 , in the embodiment of the present invention, a hydraulic oil return joint valve body includes:

[0031] A cylindrical housing 1 with a cavity inside, and a plurality of inlet oil pipes 2 penetrating into its interior are evenly distributed on the circumference around the housing 1, and each inlet oil pipe 2 is tangent to the side wall of the housing 1;

[0032] An oil returner 3 is arranged in each inlet oil pipe 2 for guiding hydraulic oil into the interior of the housing 1; an outlet oil pipe 4 is arranged at the top of the housing 1 for discharging the processed hydraulic oil;

[0033] Inside the housing 1, at a position below all the inlet oil pipes 2, a turntable 5 is rotatably arranged, and a plurality of blades 51 are evenly distributed on the turntable 5. An independent space is formed between two adjacent blades 51 for separating and guiding the hydraulic oil from different inlet oil pipes 2 to ensure that the oil return processes of each inlet oil pipe 2 do not interfere with each other.

[0034] When the hydraulic actuator returns oil, the hydraulic oil enters the housing 1 through the corresponding oil returner 3 and inlet oil pipe 2. Due to the tangential arrangement of the inlet oil pipe 2 and the side wall of the housing 1, the entering hydraulic oil pushes the blades 51 on the turntable 5 to rotate, so that the hydraulic oil from the same inlet oil pipe 2 can sequentially enter each independent space formed by a plurality of blades 51 and finally be discharged to the fuel tank through the outlet oil pipe 4, thereby avoiding reverse pressure on the oil returners 3 of other inlet oil pipes 2.

[0035] In this embodiment, an output groove 32 and an input groove 31 which are staggered up and down are arranged in the oil returner 3, a valve body 33 is slidably arranged up and down between the output groove 32 and the input groove 31, and a spring 37 is arranged above the valve body 33. When the oil pressure in the corresponding oil circuit is greater than the threshold value, the spring 37 will be compressed and the valve body 33 will be pushed open, so that the hydraulic oil enters the housing 1 for oil return.

[0036] In this embodiment, a threaded sleeve 34 is fixed above the oil returner 3. A screw plug 35 is threadedly connected to the threaded sleeve 34. The spring 37 is located between the valve body 33 and the screw plug 35, and a connecting rod 36 is slidably connected between the valve body 33 and the screw plug 35. By rotating the screw plug 35 to change the height of the screw plug 35 in the threaded sleeve 34, the pressure of the spring 37 on the valve body 33 can be adjusted, thereby adjusting the oil pressure threshold for the oil return of the oil circuit.

[0037] In this embodiment, an oil collecting cylinder 6 is fixedly arranged at the center inside the housing 1. The turntable 5 is rotatably sleeved on the outer wall of the oil collecting cylinder 6. A side hole 61 is formed in the side wall of the oil collecting cylinder 6 at a position above the turntable 5, and the side hole 61 is offset from the position of each oil inlet pipe 2. That is to say, when the space formed between the blades 51 leaves the position where the oil inlet pipe 2 is located, it will communicate with the side hole 61, so that the hydraulic oil can be discharged from the side hole 61 into the oil collecting cylinder 6.

[0038] In this embodiment, an oil suction pipe 7 is fixedly arranged at a certain distance from the bottom inside the oil collecting cylinder 6. The oil suction pipe 7 is communicated with the oil outlet pipe 4. A screw rod 8 is rotatably arranged inside the oil suction pipe 7, and a driving motor 9 is arranged at the top of the screw rod 8. By driving the screw rod 8 with the driving motor 9, the hydraulic oil in the oil collecting cylinder 6 can be sucked into the oil outlet pipe 4 and discharged into the fuel tank. Since the oil suction pipe 7 is at a certain distance from the bottom of the oil collecting cylinder 6, the impurities in the hydraulic oil will precipitate at the bottom of the oil collecting cylinder 6.

[0039] In this embodiment, a detachable oil filter 10 is arranged at the bottom of the oil collecting cylinder 6. The oil filter 10 is an adsorption type filtering structure. Through the oil filter 10, the impurities at the bottom of the oil collecting cylinder 6 can be adsorbed, and the flow of the oil circuit will not be affected.

[0040] In this embodiment, a rotating shaft 52 is fixed to one side of the blade 51 close to the oil collecting cylinder 6, and the rotating shaft 52 rotatably penetrates through the bottom of the turntable 5;

[0041] A torsion spring is arranged at the bottom of the turntable 5 on the rotating shaft 52, and a limiting block is arranged.

[0042] The torsion spring enables the blade 51 to have an initial position. Through the limiting block, the blade 51 can only rotate in the reverse direction of the rotation direction of the turntable 5 around the rotating shaft 52 beyond the initial position, and cannot rotate around the rotating shaft 52 in the rotation direction of the turntable 5 beyond the initial position. That is to say, by rotating the blade 51, the space formed between two adjacent blades 51 can be reduced, so that when the hydraulic oil is discharged from between the blades 51, no cavity will be formed between the blades 51, avoiding the unsmooth oil discharge caused by the air pressure effect. And since the blade 51 cannot rotate around the rotating shaft 52 in the rotation direction of the turntable 5 beyond the initial position, when the blade 51 returns to the initial position, the hydraulic oil can generate a thrust on the blade 51 to push the turntable 5 to rotate.

[0043] In this embodiment, an arc-shaped guide block 53 is arranged at the position between two adjacent oil inlet pipes 2 on the inner wall of the housing 1, and the guide block 53 is in contact with the upper and lower surfaces inside the housing 1.

[0044] When the blade 51 rotates to contact the guide block 53, the guide block 53 will actively push the blade 51 to rotate in the reverse direction of the rotation direction of the turntable 5, so that the space formed by the blade 51 and the rear blade 51 is reduced, and the hydraulic oil in this space is discharged from the corresponding side hole 61. After the blade 51 passes over the guide block 53, it can return to the initial position. At this time, this space leaves the position where the side hole 61 is located, avoiding the backflow of the hydraulic oil in the side hole 61.

[0045] This device is used for the oil return of multiple oil return channels of hydraulic oil, aiming to effectively manage the oil return process of the hydraulic actuator, ensure that the oil return of each oil inlet pipe does not interfere with each other, and at the same time realize the purification and smooth discharge of the oil. Specifically, in implementation:

[0046] When the hydraulic actuator returns oil, the hydraulic oil pushes open the valve body 33 through the corresponding oil returner 3 and enters the housing 1 through the oil inlet pipe 2;

[0047] The hydraulic oil pushes the blades 51 on the turntable 5 to rotate, so that the hydraulic oil discharged from the oil inlet pipe 2 sequentially enters the independent spaces formed by multiple blades 51;

[0048] During the rotation of the blade 51, with the assistance of the guide block 53, the space formed between adjacent blades 51 is reduced, and the hydraulic oil is discharged from the corresponding side hole 61 into the oil collecting cylinder 6;

[0049] The impurities in the hydraulic oil precipitate at the bottom of the oil collecting cylinder 6 and are adsorbed and filtered by the oil filter 10;

[0050] The hydraulic oil in the oil collecting cylinder 6 is sucked in by the screw 8 and discharged to the fuel tank through the oil outlet pipe 4.

[0051] The above-mentioned is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A hydraulic oil return valve body, characterized in that: include: A cylindrical shell (1) having a cavity inside, a plurality of oil inlet pipes (2) are evenly distributed on the circumference of the shell (1) and penetrate into the interior thereof, and each of the oil inlet pipes (2) is arranged tangentially to the side wall of the shell (1); Each of the oil inlet pipes (2) is provided with an oil return device (3) for guiding the hydraulic oil into the interior of the housing (1); the top of the housing (1) is provided with an oil outlet pipe (4) for discharging the treated hydraulic oil; Inside the housing (1), at a position below all the oil inlet pipes (2), a rotating disk (5) is rotatably arranged, with a plurality of blades (51) evenly distributed on the rotating disk (5), and an independent space formed between two adjacent blades (51) for separating and guiding hydraulic oil from different oil inlet pipes (2), thereby ensuring that the oil return processes of the oil inlet pipes (2) do not interfere with each other; The oil return device (3) is provided with an output groove (32) and an input groove (31) staggered up and down, a valve body (33) is slidably arranged between the output groove (32) and the input groove (31), and a spring (37) is arranged above the valve body (33); a threaded sleeve (34) is fixed above the oil return device (3), a screw plug (35) is threadedly connected to the threaded sleeve (34), the spring (37) is located between the valve body (33) and the screw plug (35), and a connecting rod (36) is slidably connected between the valve body (33) and the screw plug (35); An oil collecting cylinder (6) is fixed at the center of the housing (1), the rotating disk (5) is rotatably sleeved on the outer wall of the oil collecting cylinder (6), a side hole (61) is opened on the side wall of the oil collecting cylinder (6) above the rotating disk (5), and the side hole (61) is staggered with the position of each oil inlet pipe (2); A rotating shaft (52) is fixed to one side of the blade (51) close to the oil collecting cylinder (6), and the rotating shaft (52) rotatably penetrates the bottom of the rotating disk (5); The rotating shaft (52) is provided with a torsion spring and a limit block at the bottom of the rotating disk (5); An arc-shaped guide block (53) is provided between two adjacent oil inlet pipes (2) in the inner wall of the housing (1), and the guide block (53) fits the upper and lower surfaces inside the housing (1).

2. A hydraulic oil return valve body according to claim 1, characterized in that: An oil suction pipe (7) is fixed in the oil collecting cylinder (6) at a certain distance from the bottom, the oil suction pipe (7) is connected with the oil outlet pipe (4), a screw rod (8) is rotatably arranged in the oil suction pipe (7), and a driving motor (9) is arranged at the top of the screw rod (8).

3. A hydraulic oil return valve body according to claim 1, characterized in that: A detachable oil filter (10) is arranged at the bottom of the oil collecting cylinder (6).

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