Hydraulic oil return link valve body

Abstract

The invention discloses a hydraulic oil return link valve body which comprises a cylindrical shell internally provided with a cavity, a plurality of oil inlet pipes penetrating into the shell are evenly distributed on the periphery of the shell, and each oil inlet pipe is tangent to the side wall of the shell; an oil return device is arranged in each oil inlet pipe and used for guiding hydraulic oil into the shell; an oil outlet pipe is arranged at the top of the shell and is used for discharging the treated hydraulic oil; a rotating disc is arranged in the shell and located below all the oil inlet pipes in a rotating mode, a plurality of blades are evenly distributed on the rotating disc, an independent space is formed between every two adjacent blades and used for separating and guiding hydraulic oil from different oil inlet pipes, and it is guaranteed that the oil return processes of the oil inlet pipes do not interfere with one another. Compared with the prior art, the oil return process of the hydraulic actuator is effectively managed, it is ensured that oil return of the oil inlet pipes does not interfere with one another, and meanwhile oil is purified and discharged smoothly.

Description

Technical Field

[0001] The invention relates to the technical field of excavator components, in particular to a hydraulic oil return valve body. Background Art

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

[0003] After the actuator in the hydraulic system completes its work, a part of the hydraulic oil needs to be recovered. If this part of the returned oil is not handled properly, it will not only cause oil waste, but also may cause a series of problems, such as oil contamination, unstable system pressure, and increased oil temperature. Therefore, a well-designed hydraulic oil return system is crucial to ensure the normal operation of the hydraulic system.

[0004] In large or complex hydraulic systems, there are often multiple actuators and corresponding oil return paths. In order to ensure that each actuator can smoothly guide the return oil back to the tank while avoiding problems such as oil mixing and pressure fluctuations, it is necessary to design an oil return valve with multiple oil return channels. According to different oil return requirements, the return oil from different actuators can be guided to the corresponding channels, thereby achieving precise control and effective management of the return oil.

[0005] In the prior art, the external oil return method refers to the return oil directly returning to the hydraulic oil tank through multiple return valves and external pipes, and the external oil return requires more space and pipes to arrange, which not only increases the complexity and cost of the system, but also may bring inconvenience to the maintenance and maintenance of the system. Secondly, due to the need for additional pipes and joints, the external oil return method is more prone to leakage problems, thus affecting the stability and safety of the system.

[0006] In addition to the external oil return method, internal overflow oil return is also a commonly used oil return method in the prior art. However, hydraulic oils of different flow rates are easily mixed together during the internal overflow oil return process, resulting in deterioration of oil quality. In addition, there may be pressure differences between adjacent oil return lines. If not handled properly, it may cause oil backflow, further exacerbating the pollution and deterioration of the oil.

[0007] In the hydraulic system, hydraulic oil not only plays the role of transmitting power and lubrication, but also bears the heavy responsibility of cooling and cleaning the system. However, as the system runs, 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 of hydraulic oil. However, the existing oil return valve often has shortcomings in the purification of hydraulic oil, and additional filtering equipment is needed to assist.

[0008] In summary, although the existing oil return valves in multiple oil return channels have solved the problem of oil return management to a certain extent, they still have the disadvantages of large space occupied by the external oil return, easy leakage, deterioration of the internal overflow return oil quality, 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 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 valve body, comprising:

[0010] A cylindrical shell having a cavity inside, a plurality of oil inlet pipes penetrating into the shell are evenly distributed on the circumference of the shell, and each of the oil inlet pipes is tangent to the side wall of the shell;

[0011] Each of the oil inlet pipes is provided with an oil return device for guiding the hydraulic oil into the interior of the housing; an oil outlet pipe is provided on the top of the housing for discharging the treated hydraulic oil;

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

[0013] Furthermore, the oil return device is provided with an output groove and an input groove which are staggered up and down, a valve body is provided between the output groove and the input groove to slide up and down, and a spring is provided above the valve body.

[0014] Furthermore, a threaded sleeve is fixed above the oil return device, 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 slidably connected between the valve body and the screw plug.

[0015] Furthermore, an oil collecting cylinder is fixed in the center of the shell, the turntable is rotatably sleeved on the outer wall of the oil collecting cylinder, and a side hole is opened on the side wall of the oil collecting cylinder above the turntable, and the side hole is staggered with the position of each oil inlet pipe.

[0016] Furthermore, an oil suction pipe is fixed in the oil collecting barrel at a certain distance from the bottom, the oil suction pipe is connected with the oil outlet pipe, a screw is rotatably arranged in the oil suction pipe, and a driving motor is arranged on the top of the screw.

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

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

[0019] The rotating shaft is provided with a torsion spring and a limit block at the bottom of the rotating disk.

[0020] Furthermore, an arc-shaped guide block is provided between two adjacent oil inlet pipes in the inner wall of the shell, and the guide block fits with the upper and lower surfaces inside the shell.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

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

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

[0024] In the present invention, the oil suction pipe and screw design in the oil collecting barrel can suck the hydraulic oil out of the oil collecting barrel and discharge it into the oil tank. At the same time, the oil filter at the bottom of the oil collecting barrel is used to absorb and filter impurities, thereby purifying the oil. The oil filter adopts an adsorption filtering structure, which can not only effectively remove impurities, but also will not affect the circulation of the oil circuit. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0026] Figure 2 It is the structural schematic diagram of the oil return device;

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

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

[0029] In the figure: 1. Shell; 2. Oil inlet pipe; 3. Oil return device; 31. Input groove; 32. Output groove; 33. Valve body; 34. Threaded sleeve; 35. Screw plug; 36. Connecting rod; 37. Spring; 4. Oil outlet pipe; 5. Turntable; 51. Blade; 52. Rotating shaft; 53. Guide block; 6. Oil collecting cylinder; 61. Side hole; 7. Oil suction pipe; 8. Screw; 9. Drive motor; 10. Oil filter. DETAILED DESCRIPTION

[0030] See also Figure 1-Figure 4 In an embodiment of the present invention, a hydraulic oil return valve body includes:

[0031] A cylindrical shell 1 having a cavity inside, a plurality of oil inlet pipes 2 penetrating into the shell 1 are evenly distributed on the circumference thereof, and each of the oil inlet pipes 2 is tangent to the side wall of the shell 1;

[0032] 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; an oil outlet pipe 4 is provided on the top of the housing 1 for discharging the treated hydraulic oil;

[0033] Inside the shell 1, below all the oil inlet pipes 2, a turntable 5 is rotatably arranged, on which a plurality of blades 51 are evenly distributed, and an independent space is formed between two adjacent blades 51 for separating and guiding the 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.

[0034] When the hydraulic actuator returns oil, the hydraulic oil enters the housing 1 through the corresponding oil return device 3 and the oil inlet pipe 2. Since the oil inlet pipe 2 is tangential to 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 oil inlet pipe 2 can enter the independent spaces formed by the multiple blades 51 in turn, and finally be discharged into the oil tank through the oil outlet pipe 4, thereby avoiding the generation of reverse pressure on the oil return devices 3 of other oil inlet pipes 2.

[0035] In this embodiment, 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 provided between the output groove 32 and the input groove 31, and a spring 37 is provided above the valve body 33. When the oil pressure in the corresponding oil circuit is greater than the threshold value, the spring 37 is compressed to push open the valve body 33, 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 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. 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 of the oil return line.

[0037] In this embodiment, an oil collecting barrel 6 is fixed at the center of the housing 1, the rotary disc 5 is rotatably sleeved on the outer wall of the oil collecting barrel 6, and a side hole 61 is opened on the side wall of the oil collecting barrel 6 above the rotary disc 5, and the side hole 61 is staggered from the position of each oil inlet pipe 2. That is to say, when the space formed between the blades 51 leaves the position of the oil inlet pipe 2, it will be connected with the side hole 61, so that the hydraulic oil can be discharged from the side hole 61 into the oil collecting barrel 6.

[0038] In this embodiment, an oil suction pipe 7 is fixed at a certain distance from the bottom of the oil collecting barrel 6, and 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 8. The driving motor 9 drives the screw rod 8 to suck the hydraulic oil in the oil collecting barrel 6 to the oil outlet pipe 4 to be discharged into the oil tank. Since the oil suction pipe 7 is at a certain distance from the bottom of the oil collecting barrel 6, impurities in the hydraulic oil will settle at the bottom of the oil collecting barrel 6.

[0039] In this embodiment, a detachable oil filter 10 is provided at the bottom of the oil collecting barrel 6. The oil filter 10 is an adsorption filter structure, through which the impurities at the bottom of the oil collecting barrel 6 can be adsorbed without affecting the circulation of the oil circuit.

[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 the bottom of the rotating disk 5;

[0041] The rotating shaft 52 is provided with a torsion spring at the bottom of the rotating disk 5 and a limit block.

[0042] The torsion spring allows the blade 51 to have an initial position, and the stop block allows the blade 51 to only rotate in the opposite direction of the rotation direction of the turntable 5 around the rotation shaft 52 beyond the initial position, but not to rotate in the direction of the rotation direction of the turntable 5 around the rotation shaft 52 beyond the initial position. In other words, the rotation of the blade 51 can reduce the space formed between two adjacent blades 51, so that when the hydraulic oil is discharged from between the blades 51, no cavity will be formed between the blades 51, thereby avoiding the oil discharge being not smooth due to the air pressure. Since the blade 51 cannot rotate in the direction of the rotation direction of the turntable 5 around the rotation shaft 52 beyond the initial position, the hydraulic oil can generate thrust on the blade 51 to drive the turntable 5 to rotate after the blade 51 returns to the initial position.

[0043] In this embodiment, 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 is in contact with the upper and lower surfaces of the housing 1 .

[0044] When the blade 51 rotates to fit with the guide block 53, the guide block 53 will actively push the blade 51 to rotate in the opposite direction of the rotation direction of the turntable 5, thereby reducing the space formed by the blade 51 and the rear blade 51, so that the hydraulic oil in the space is discharged from the corresponding side hole 61, and the blade 51 can return to its initial position after crossing the guide block 53. At this time, the space leaves the position of the side hole 61 to prevent the hydraulic oil in the side hole 61 from flowing back.

[0045] This device is used for hydraulic oil return of multiple oil return channels. It aims 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 realize the purification and smooth discharge of the oil. When implemented specifically:

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

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

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

[0049] Impurities in the hydraulic oil are precipitated at the bottom of the oil collecting cylinder 6 and are adsorbed and filtered through the oil filter 10;

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

[0051] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which 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 turntable (5) is rotatably arranged, with a plurality of blades (51) evenly distributed on the turntable (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.

2. A hydraulic oil return valve body according to claim 1, characterized in that: 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).

3. A hydraulic oil return valve body according to claim 2, characterized in that: 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).

4. A hydraulic oil return valve body according to claim 1, characterized in that: An oil collecting cylinder (6) is fixed at the center of the housing (1), and the turntable (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 turntable (5), and the side hole (61) is staggered with the position of each oil inlet pipe (2).

5. A hydraulic oil return valve body according to claim 4, 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).

6. A hydraulic oil return valve body according to claim 4, characterized in that: A detachable oil filter (10) is arranged at the bottom of the oil collecting cylinder (6).

7. A hydraulic oil return valve body according to claim 4, characterized in that: 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).

8. A hydraulic oil return valve body according to claim 7, characterized in that: 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).

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