Hydraulic valve and hydraulic system

Abstract

The present application relates to the technical field of hydraulic equipment, and specifically discloses a hydraulic valve and a hydraulic system, which includes a valve housing and a valve body, wherein the valve body rotates on the inner wall of the valve housing; the two end surfaces of the valve housing are connected to bearing support plates, and the two end surfaces of the valve body are connected to rotating shafts, and the two rotating shafts are respectively rotatably connected to the two bearing support plates; an oil inlet passage is arranged in the valve body, and the two ends of the oil inlet passage are connected to the periphery of the valve body; an oil discharge passage is arranged in the valve body, and the two ends of the oil discharge passage are connected to the periphery of the valve body; an oil inlet pipe and an oil outlet pipe are connected to the periphery of the valve housing, the oil inlet pipe is connected to one end of the oil inlet passage, and the oil outlet pipe is connected to one end of the oil discharge passage; an oil pipe a and an oil pipe b are connected to the periphery of the valve housing, one end of the oil pipe a is connected to the other end of the oil inlet passage, and one end of the oil pipe b is connected to the other end of the oil discharge passage, and the other ends of the oil pipe a and the oil pipe b are used to respectively connect the two ends of the inner cavity of the hydraulic cylinder. The present application has the effect of improving the convenience of the hydraulic valve.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic equipment, and in particular to a hydraulic valve and a hydraulic system. Background Art

[0002] Hydraulic cylinders have been widely used in industrial control due to their unique advantages such as fast response speed, large load stiffness, and large control power.

[0003] In the related art, refer to Figure 1 The hydraulic valve is connected to the two ends of the hydraulic cylinder through two pipelines A. A valve stem slides in the hydraulic valve cavity. Three piston heads are integrally formed on the circumference of the valve stem. The piston heads slide on the inner wall of the hydraulic valve. Three pipelines B are connected to the circumference of the hydraulic valve. The middle pipeline B is the oil inlet pipeline, which draws hydraulic oil from the oil tank. The pipelines B at both ends are used to discharge the hydraulic oil and are also connected to the oil tank. When the piston rod in the hydraulic cylinder needs to be extended, the middle pipeline B is injected with hydraulic oil. The hydraulic oil enters the pipeline A on the right through the two piston heads on the right, and then enters the hydraulic cylinder and pushes the piston rod outward; the piston rod presses the hydraulic oil in the hydraulic cylinder through the pipeline B on the left and into the space between the two piston heads on the left, and finally flows back to the oil tank through the pipeline A on the left. When the piston rod needs to be retracted into the hydraulic cylinder, refer to Figure 2 , move the valve stem to the right, the valve stem drives the three piston heads to move synchronously, the three piston heads move to the other side of the three pipelines B respectively, the middle pipeline B is injected with hydraulic oil, the hydraulic oil enters the pipeline A on the left through between the two piston heads on the left, and then enters the hydraulic cylinder and pushes the piston rod to move inward; the piston rod presses the hydraulic oil in the hydraulic cylinder through the pipeline B on the right into between the two piston heads on the right, and finally flows back to the oil tank through the pipeline A on the right.

[0004] With regard to the above-mentioned related technologies, when the piston rod of the hydraulic cylinder is extended and retracted by the above-mentioned hydraulic valve, three pipelines B are required to realize the circulation of the hydraulic oil in the hydraulic cylinder and the hydraulic oil in the oil tank. However, when used in conjunction with the hydraulic system in the equipment, since there are many pipelines connecting the hydraulic valves, it is more troublesome to lay out the pipelines, especially when multiple hydraulic cylinders are loaded on the equipment, the layout of the hydraulic valves is even more troublesome. Summary of the invention

[0005] In order to improve the convenience of installing the hydraulic valve on the equipment, the present application provides a hydraulic valve and a hydraulic system.

[0006] The hydraulic valve and the hydraulic system provided in this application adopt the following technical solutions:

[0007] In the first aspect, a hydraulic valve comprises a valve housing and a valve body, wherein the valve body rotates on the inner wall of the valve housing; the two end surfaces of the valve housing are connected to bearing support plates, and the two end surfaces of the valve body are coaxially connected to rotating shafts, and the two rotating shafts are respectively rotatably connected in the two bearing support plates; an oil inlet passage is provided in the valve body, and the two ends of the oil inlet passage are connected to the peripheral surface of the valve body; an oil discharge passage is provided in the valve body, and the two ends of the oil discharge passage are connected to the peripheral surface of the valve body; the oil inlet passage and the oil discharge passage are closed. Axially symmetrical with the valve body; an oil inlet pipe and an oil outlet pipe are connected to the circumferential surface of the valve housing, the oil inlet pipe is connected to one end of the oil inlet passage, the oil inlet pipe is used for the hydraulic oil to enter, the oil outlet pipe is connected to one end of the oil discharge passage, and the oil outlet pipe is used for the hydraulic oil to be discharged; an oil pipe a and an oil pipe b are connected to the circumferential surface of the valve housing, one end of the oil pipe a is connected to the other end of the oil inlet passage, one end of the oil pipe b is connected to the other end of the oil discharge passage, and the other ends of the oil pipe a and the oil pipe b are used to respectively connect to the two ends of the inner cavity of the hydraulic cylinder.

[0008] Optionally, four oil inlet passages and four oil discharge passages are arranged in the valve body, which are the first oil inlet passage, the second oil inlet passage, the third oil inlet passage and the fourth oil inlet passage in sequence along the axial direction of the valve body, and the first oil discharge passage, the second oil discharge passage, the third oil discharge passage and the fourth oil discharge passage in sequence along the axial direction of the valve body; four oil pipes a and four oil pipes b are connected to the circumferential surface of the valve shell, which are the first oil pipe a, the second oil pipe a, the third oil pipe a and the fourth oil pipe a in sequence, and the first oil pipe b, the second oil pipe b, the third oil pipe b and the fourth oil pipe b in sequence; the four oil inlet passages correspond one-to-one to the four oil pipes a, and the four oil discharge passages correspond one-to-one to the four oil pipes b.

[0009] Optionally, the circumference of the oil inlet pipe is connected with four first branch pipes, the first branch pipes are inserted into the valve housing, and the four first branch pipes are used to be connected to one end of four oil inlet channels respectively; the circumference of the oil outlet pipe is connected with four second branch pipes, the second branch pipes are inserted into the valve housing, and the four second branch pipes are used to be connected to one end of four oil outlet channels respectively.

[0010] Optionally, a rotating shaft is installed on the end face of the rotating shaft, a turntable is connected to the end of the rotating shaft, a rotating plate is connected to the circumferential surface of the rotating shaft, a connecting plate is connected to the end of the rotating plate, a positioning plate is connected to the connecting plate away from the end of the rotating plate, the positioning plate is attached to the side of the bearing support plate, and a positioning mechanism for fixing the positioning plate is installed on the side of the bearing support plate.

[0011] Optionally, two baffles are connected to the circumferential surface of the rotating shaft, and the two baffles are respectively located on two side surfaces of the connecting plate. The baffles are attached to the side surfaces of the connecting plate, and the top surfaces of the baffles are flush with the end surfaces of the rotating shaft.

[0012] Optionally, the end surface of the rotating shaft away from the turntable is coaxially connected with a rotating rod, and the rotating rod slides in the rotating shaft; the positioning mechanism includes a cover plate and a limit plate, both ends of the cover plate are connected to vertical plates, the ends of the vertical plates are connected to the side surfaces of the bearing support plate, the limit plate is located between the two vertical plates, both ends of the limit plate are connected to the side surfaces of the two vertical plates close to each other, the limit plate is connected to the side surfaces of the bearing support plate, one end of the limit plate is provided with four conversion grooves for inserting the positioning plate, and the other end of the limit plate is provided with four reversing grooves for inserting the positioning plate.

[0013] Optionally, a plurality of first annular grooves are provided on the inner wall of the valve housing, and four first branch pipes, four second branch pipes, the first oil pipe a, the second oil pipe a, the third oil pipe a, the fourth oil pipe a, the first oil pipe b, the second oil pipe b, the third oil pipe b and the fourth oil pipe b each correspond to a first annular groove; a first sealing ring is provided in the first annular groove, and the first sealing ring is attached to the circumferential surface of the valve body; a plurality of first oil channels are provided in the valve housing, and the first oil channels correspond to the first annular groove one by one, one end of the first oil channel is connected to the end of the first annular groove away from the valve body, and the other end of the first oil channel is connected to the outer circumferential surface of the valve housing; an auxiliary oil pipe is inserted into the inner wall of the first oil channel away from the end of the first annular groove, and an oil filling mechanism for filling oil into the auxiliary oil pipe is installed on the side of the bearing support plate.

[0014] Optionally, the oil injection mechanism includes a piston head, a first spring and a main oil pipe; an oil chamber is provided in the rotating shaft, the oil chamber is connected to the end face of the rotating shaft, the oil chamber is cylindrical, the rotating rod is located in the oil chamber, the end face of the rotating shaft is connected to a sealing cover, and the rotating rod passes through the sealing cover; the piston head is connected to the end of the rotating rod, and the piston head slides on the inner wall of the oil chamber; the first spring is sleeved outside the rotating rod, one end of the first spring is pressed against the end face of the piston head close to the sealing cover, and the other end of the first spring is pressed against on the side of the sealing cover close to the piston head; four main oil pipes are arranged, one end of the four main oil pipes are connected to the end of the oil chamber close to the rotating shaft, the other end of one of the main oil pipes is connected to the four auxiliary oil pipe ends close to the oil inlet pipe, the other end of another main oil pipe is connected to the four auxiliary oil pipe ends close to the oil outlet pipe, the other end of another main oil pipe is connected to the four auxiliary oil pipes close to oil pipe a, and the other end of the remaining main oil pipe is connected to the four auxiliary oil pipe ends close to oil pipe b.

[0015] In the second aspect, a hydraulic system includes a hydraulic valve, an oil tank, a hydraulic cylinder, a control valve and an oil pump, the oil pump is installed at the bottom of the oil tank, the middle position of the oil inlet pipe is connected to an oil delivery pipeline, and the middle position of the oil outlet pipe is connected to an oil return pipeline; the end of the oil delivery pipeline away from the hydraulic valve is connected to the oil pump, the control valve is connected to the oil delivery pipeline, and the end of the oil return pipeline away from the hydraulic valve is connected to the top side of the oil tank; four hydraulic cylinders are provided, and the four hydraulic cylinders correspond to four groups of oil pipes a and oil pipes b.

[0016] Optionally, the control valve includes a seat body, a valve stem and a second spring, a sliding groove is provided in the seat body, the sliding groove is cylindrical, the valve stem slides on the inner wall of the sliding groove, the second spring is provided in the sliding groove, one end of the second spring is pressed against the inner wall of the sliding groove, and the other end of the second spring is pressed against the end face of the valve stem, the end face of the valve stem away from the second spring is connected with a push-pull rod, and the push-pull rod passes through the end face of the seat body; a through hole is provided in the valve stem that passes through the circumferential surface of the valve stem, and the through hole is used to connect to the oil pipeline.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] 1. When using the hydraulic valve, inject hydraulic oil into the oil inlet pipe, the hydraulic oil enters the oil inlet channel, and then discharges into the oil pipe a, and then enters one end of the cavity of the hydraulic cylinder; the hydraulic oil in the hydraulic cylinder pushes the piston to move, and the piston presses the hydraulic oil at the other end of the hydraulic cylinder into the oil pipe b, and the hydraulic oil in the oil pipe b enters the oil discharge channel, and the hydraulic oil in the oil discharge channel is discharged into the oil outlet pipe. When the drive shaft rotates 90°, the shaft drives the valve body to rotate 90°, then the oil inlet channel originally aligned with the port of the oil inlet pipe is rotated to align with the oil pipe b, the oil inlet channel originally aligned with the port of the oil pipe a is rotated to align with the oil inlet pipe, the oil discharge channel originally aligned with the port of the oil outlet pipe is rotated to align with the oil pipe a, and the oil discharge channel originally aligned with the port of the oil pipe b is rotated to align with the oil outlet pipe; hydraulic oil is injected into the oil inlet pipe again, the hydraulic oil enters the oil inlet channel, the hydraulic oil is discharged into the oil pipe b, and then enters the other end of the cavity of the hydraulic cylinder; the hydraulic oil in the hydraulic cylinder pushes the piston to move, and the piston presses the hydraulic oil at the other end of the hydraulic oil into the oil pipe a, the hydraulic oil in the oil pipe a enters the oil discharge channel, and the hydraulic oil in the oil discharge channel is discharged into the oil outlet pipe; the above technical solution only needs to set up an oil outlet pipe to realize the hydraulic oil reflux at both ends of the hydraulic cylinder piston, and the hydraulic valve is small in size and occupies a small space, making the installation and layout of the hydraulic valve more convenient and convenient;

[0019] 2. When it is necessary to inject hydraulic oil into the first annular groove, the oil injection mechanism injects hydraulic oil into the auxiliary oil pipe, and the hydraulic oil enters the first annular groove. The hydraulic oil pushes the first sealing ring, and the first sealing ring is pressed against the peripheral surface of the valve body to seal the pores between the flow channels;

[0020] 3. When it is necessary to release the pressure of the first sealing ring on the back of the valve body, pull the rotary disk outward, the rotary disk drives the rotating rod to move through the rotating shaft, the rotating rod drives the piston head to move, the piston head compresses the first spring, and the piston head extracts the hydraulic oil in the first annular groove through the main oil pipe and the auxiliary oil pipe, so that the pressure of the first sealing ring on the valve body can be released; when the first sealing ring is required to press the valve body, release the rotary disk, the first spring resets, the first spring pushes the piston head, the piston head pushes the hydraulic oil in the oil chamber, the hydraulic oil is squeezed into the first annular groove through the main oil pipe and the auxiliary oil pipe, and the hydraulic oil pushes the first sealing ring to press against the surface of the valve body;

[0021] 4. The oil pump draws the hydraulic oil into the oil delivery pipeline, then enters the oil inlet pipe, and flows into the four first branch pipes through the oil inlet pipe. The control valve controls the flow of the oil delivery pipeline. The hydraulic oil in the oil inlet pipe enters the hydraulic valve. The hydraulic valve controls the hydraulic oil in the hydraulic cylinder to flow out into the hydraulic valve. The hydraulic oil in the hydraulic valve enters the oil outlet pipe through the second branch pipe, enters the oil return pipe through the oil outlet pipe, and then enters the oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the cross-sectional structure of a hydraulic valve in the prior art;

[0023] Figure 2 It is a cross-sectional structural schematic diagram of another state of a hydraulic valve in the prior art;

[0024] Figure 3 It is a structural schematic diagram of the hydraulic system of an embodiment of the present application;

[0025] Figure 4 yes Figure 3 The structural diagram of part A in the figure;

[0026] Figure 5 It is a schematic diagram of the exploded structure of the positioning mechanism of the embodiment of the present application;

[0027] Figure 6 It is a schematic cross-sectional structure diagram of the first oil inlet passage and the first oil discharge passage of the embodiment of the present application;

[0028] Figure 7 yes Figure 6 The structural diagram of part B;

[0029] Figure 8 is a schematic diagram of the cross-sectional structure of the second oil inlet passage and the second oil discharge passage in an embodiment of the present application;

[0030] Fig. 9 is a schematic cross-sectional structure diagram of the third oil inlet passage and the third oil discharge passage of the embodiment of the present application;

[0031] Fig.10 is a schematic cross-sectional structural diagram of the fourth oil inlet passage and the fourth oil discharge passage of the embodiment of the present application;

[0032] Fig.11 is a schematic diagram of the cross-sectional structure of the rotating shaft of an embodiment of the present application;

[0033] Fig.12 It is a schematic diagram of the cross-sectional structure of the control valve according to the embodiment of the present application.

[0034] Description of reference numerals:

[0035] 001, pipeline A; 002, pipeline B; 01, hydraulic valve; 1, valve housing; 11, bearing support plate; 12, oil inlet pipe; 121, first branch pipe; 13, oil outlet pipe; 131, second branch pipe; 14, first oil pipe a; 15, second oil pipe a; 16, third oil pipe a; 17, fourth oil pipe a; 18, first oil pipe b; 19, second oil pipe b; 110, third oil pipe b; 111, fourth oil pipe b; 112, first annular groove; 113, first sealing ring; 114, first oil channel; 115, auxiliary oil pipe; 2, valve body; 21, rotating shaft; 211, rotating shaft; 2111, rotating plate; 2112, connecting plate; 2113, positioning plate; 212, rotating disk; 213, baffle; 214, rotating rod; 215, oil chamber; 216. Sealing cover; 217. Second annular groove; 218. Second sealing ring; 22. First oil inlet passage; 23. Second oil inlet passage; 24. Third oil inlet passage; 25. Fourth oil inlet passage; 26. First oil discharge passage; 27. Second oil discharge passage; 28. Third oil discharge passage; 29. ​​Fourth oil discharge passage; 4. Positioning mechanism; 41. Cover plate; 411. Vertical plate; 42. Limiting plate; 421. Conversion groove; 422. Reversing groove; 5. Oil filling mechanism; 51. Piston head; 52. First spring; 53. Main oil pipe; 6. Oil tank; 61. Oil delivery pipeline; 62. Oil return pipeline; 7. Hydraulic cylinder; 8. Control valve; 81. Seat body; 811. Sliding groove; 82. Valve stem; 821. Push-pull rod; 822. Through hole; 83. Second spring. DETAILED DESCRIPTION

[0036] The following is combined with Figure 3-12 This application is described in further detail.

[0037] The present application embodiment discloses a hydraulic valve and a hydraulic system. Figure 3-12The hydraulic valve comprises a valve housing 1 and a valve body 2. The valve housing 1 is a cylindrical housing, and the valve body 2 is a cylindrical body. The valve body 2 rotates on the inner wall of the valve housing 1, and the circumference of the valve body 2 fits the inner circumference of the valve housing 1; the two end surfaces of the valve housing 1 are connected with bearing support plates 11, and the two end surfaces of the valve body 2 are coaxially connected with rotating shafts 21, and the two rotating shafts 21 are respectively rotatably connected in the two bearing support plates 11 through bearings; an oil inlet channel is arranged in the valve body 2, and the two ends of the oil inlet channel are connected to the circumference of the valve body 2; an oil discharge channel is arranged in the valve body 2, and the two ends of the oil discharge channel are connected to the circumference of the valve body 2; the oil inlet channel and the oil discharge channel are symmetrical about the valve body 2 axis. The two ports of the oil inlet passage and the two ports of the oil outlet passage are cross-arranged and the four ports are evenly distributed around the circumference of the valve body 2; the circumferential surface of the valve housing 1 is connected with an oil inlet pipe 12 and an oil outlet pipe 13, the oil inlet pipe 12 is connected to one end of the oil inlet passage, the oil inlet pipe 12 is used for the hydraulic oil to enter, the oil outlet pipe 13 is connected to one end of the oil outlet passage, and the oil outlet pipe 13 is used for the hydraulic oil to be discharged; the circumferential surface of the valve housing 1 is connected with an oil pipe a and an oil pipe b, one end of the oil pipe a is connected to the other end of the oil inlet passage, one end of the oil pipe b is connected to the other end of the oil outlet passage, and the other ends of the oil pipe a and the oil pipe b are used to respectively connect the two ends of the inner cavity of the hydraulic cylinder 7.

[0038] When using the hydraulic valve 01, hydraulic oil is injected into the oil inlet pipe 12, the hydraulic oil enters the oil inlet channel, and the hydraulic oil is discharged into the oil pipe a, and then enters one end of the cavity of the hydraulic cylinder 7; the hydraulic oil in the hydraulic cylinder 7 drives the piston to move, and the piston presses the hydraulic oil at the other end of the hydraulic cylinder 7 into the oil pipe b, and the hydraulic oil in the oil pipe b enters the oil discharge channel, and the hydraulic oil in the oil discharge channel is discharged into the oil outlet pipe 13. The drive shaft 21 rotates 90°, and the shaft 21 drives the valve body 2 to rotate 90°, then the port of the oil inlet passage originally aligned with the oil inlet pipe 12 is rotated to align with the oil pipe b, the port of the oil inlet passage originally aligned with the oil pipe a is rotated to align with the oil inlet pipe 12, the port of the oil discharge passage originally aligned with the oil outlet pipe 13 is rotated to align with the oil pipe a, and the port of the oil discharge passage originally aligned with the oil pipe b is rotated to align with the oil outlet pipe 13; inject hydraulic oil into the oil inlet pipe 12 again, the hydraulic oil enters the oil inlet passage, and the hydraulic oil is discharged into the oil pipe b, and then Then it enters the other end of the cavity of the hydraulic cylinder 7; the hydraulic oil in the hydraulic cylinder 7 drives the piston to move, and the piston presses the hydraulic oil at the other end of the hydraulic oil into the oil pipe a, and the hydraulic oil in the oil pipe a then enters the oil discharge oil channel, and the hydraulic oil in the oil discharge oil channel is discharged into the oil outlet pipe 13; the above technical solution only needs to set up an oil outlet pipe 13 to realize the hydraulic oil reflux at both ends of the piston of the hydraulic cylinder 7, and the hydraulic valve 01 is small in size and occupies a small space, which makes the hydraulic valve 01 more convenient to install and arrange.

[0039] A plurality of oil inlet passages and a plurality of oil discharge passages are arranged in the valve body 2. In the embodiment of the present application, four oil inlet passages and four oil discharge passages are arranged, and along the axial direction of the valve body 2, they are the first oil inlet passage 22, the second oil inlet passage 23, the third oil inlet passage 24 and the fourth oil inlet passage 25, respectively. The second oil inlet passage 23 rotates 20° around the circumference of the valve body 2 relative to the first oil inlet passage 22, the third oil inlet passage 24 rotates 20° around the circumference of the valve body 2 relative to the second oil inlet passage 23, and the fourth oil inlet passage 25 rotates 20° around the circumference of the valve body 2 relative to the third oil inlet passage 24. Along the axial direction of the valve body 2, they are the first oil discharge passage 22, the second oil inlet passage 23, the third oil inlet passage 24 and the fourth oil discharge passage 25, respectively. 26, a second oil discharge passage 27, a third oil discharge passage 28 and a fourth oil discharge passage 29; the circumferential surface of the valve housing 1 is connected with a plurality of oil pipes a and a plurality of oil pipes b. In the embodiment of the present application, four oil pipes a and four oil pipes b are connected, namely, a first oil pipe a14, a second oil pipe a15, a third oil pipe a16 and a fourth oil pipe a17, respectively, and first oil pipe b18, a second oil pipe b19, a third oil pipe b110 and a fourth oil pipe b111, respectively. The first oil pipe a14, the second oil pipe a15, the third oil pipe a16 and the fourth oil pipe a17 are evenly distributed along the axial direction of the valve housing 1. The first oil pipe b18, the second oil pipe b19, the third oil pipe b110 and the fourth oil pipe b111 are evenly distributed along the axial direction of the valve housing 1. , the third oil pipe b110 and the fourth oil pipe b111 are evenly distributed along the axial direction of the valve housing 1; the valve body 2 is rotated to make the port at one end of the second oil inlet passage 23 connected to the oil inlet pipe 12, the other end of the second oil inlet passage 23 connected to the second oil pipe a15, the port at one end of the second oil discharge passage 27 connected to the oil outlet pipe 13, the other end of the second oil discharge passage 27 connected to the second oil pipe b19, one end of the second oil pipe a15 and the second oil pipe b19 are used to connect the two ends of the inner cavity of the hydraulic cylinder 7 respectively; the valve body 2 is rotated again to make the port at one end of the third oil inlet passage 24 connected to the oil inlet pipe 12, the other end of the third oil inlet passage 24 connected to the third oil pipe a16 , one end of the third oil discharge channel 28 is connected to the oil outlet pipe 13, and the other end of the third oil discharge channel 28 is connected to the third oil pipe b110. One ends of the third oil pipe a16 and the third oil pipe b110 are used to respectively connect the two ends of the inner cavity of the hydraulic cylinder 7; then rotate the valve body 2 to make one end of the fourth oil inlet channel 25 connected to the oil inlet pipe 12, the other end of the fourth oil inlet channel 25 is connected to the fourth oil pipe a17, one end of the fourth oil discharge channel 29 is connected to the oil outlet pipe 13, and the other end of the fourth oil discharge channel 29 is connected to the fourth oil pipe b111. One ends of the fourth oil pipe a17 and the fourth oil pipe b111 are used to respectively connect the two ends of the inner cavity of the hydraulic cylinder 7.

[0040] The oil inlet pipe 12 is connected to four first branch pipes 121 on its circumference, the first branch pipes 121 are inserted into the valve housing 1, and the four first branch pipes 121 are used to be connected to one end of four oil inlet passages respectively; the oil outlet pipe 13 is connected to four second branch pipes 131 on its circumference, the second branch pipes 131 are inserted into the valve housing 1, and the four second branch pipes 131 are used to be connected to one end of four oil outlet passages respectively.

[0041] By driving the valve body 2 to rotate 20°, 40° or 60°, different oil inlet channels are connected to the corresponding first branch pipe 121 and oil pipe a, and different oil discharge channels are connected to the corresponding second branch pipe 131 and oil pipe b. The extension and retraction of the piston rods of different hydraulic cylinders 7 can be controlled, and multiple hydraulic cylinders 7 can be controlled to work through one hydraulic valve 01.

[0042] A rotating shaft 211 is installed on the end face of the rotating shaft 21, a rotating disk 212 is connected to the end of the rotating shaft 211, a rotating plate 2111 is connected to the circumferential surface of the rotating shaft 211, a connecting plate 2112 is connected to the end of the rotating plate 2111, a positioning plate 2113 is connected to the end of the connecting plate 2112 away from the rotating plate 2111, the positioning plate 2113 is attached to the side of the bearing support plate 11, and a positioning mechanism 4 for fixing the positioning plate 2113 is installed on the side of the bearing support plate 11; by releasing the fixing of the positioning plate 2113 by the positioning mechanism 4, the rotating disk 212 can be driven to rotate, the rotating disk 212 drives the rotating shaft 211 to rotate, and the rotating shaft 211 can drive the rotating shaft 21 to rotate.

[0043] Two baffles 213 are connected to the circumference of the rotating shaft 21, and the two baffles 213 are respectively located on the two side surfaces of the connecting plate 2112, the baffles 213 are attached to the side surfaces of the connecting plate 2112, and the top surfaces of the baffles 213 are flush with the end surfaces of the rotating shaft 21; when the positioning mechanism 4 releases the fixation of the positioning plate 2113, the turntable 212 rotates, the turntable 212 drives the rotating shaft 211 to rotate, the rotating shaft 211 drives the rotating plate 2111 to rotate, the rotating plate 2111 drives the connecting plate 2112 to rotate, and the connecting plate 2112 drives the rotating shaft 21 to rotate through the two baffles 213.

[0044] The end surface of the rotating shaft 211 away from the rotating disk 212 is coaxially connected with a rotating rod 214, and the rotating rod 214 slides in the rotating shaft 21; the positioning mechanism 4 includes a cover plate 41 and a limit plate 42, both of which are arc-shaped plates, and both ends of the cover plate 41 are connected to a vertical plate 411, and the end of the vertical plate 411 is connected to the side of the bearing support plate 11, the diameter of the cover plate 41 is equal to the diameter of the bearing support plate 11, and the limit plate 42 is located between the two vertical plates 411. The two ends of the plate 42 are connected to the sides of the two vertical plates 411 that are close to each other. The limit plate 42 is connected to the side of the bearing support plate 11. The diameter of the limit plate 42 is equal to the diameter of the bearing support plate 11. One end of the limit plate 42 is provided with four conversion grooves 421 for inserting the positioning plate 2113, and the other end of the limit plate 42 is provided with four reversing grooves 422 for inserting the positioning plate 2113; the distance between the limit plate 42 and the cover plate 41 is greater than the width of the positioning plate 2113.

[0045] When it is necessary to drive the piston rod of the hydraulic cylinder 7 to be retracted into the hydraulic cylinder 7, the rotating disk 212 is pulled outward, the rotating disk 212 drives the rotating shaft 211, the rotating shaft 211 drives the rotating rod 214 to slide in the rotating shaft 21, the rotating shaft 211 drives the rotating plate 2111, the rotating plate 2111 drives the positioning plate 2113 to move out of the conversion groove 421 through the connecting plate 2112, the rotating disk 212 rotates 90°, so that the rotating shaft 21 drives the valve body 2 to rotate 90°, aligns the positioning plate 2113 with the reversing groove 422, and pushes the rotating disk 212 inward, the rotating disk 212 drives the rotating shaft 211, the rotating shaft 211 drives the rotating rod 214, the rotating shaft 211 drives the rotating plate 2111, the rotating plate 2111 drives the positioning plate 2113 to be inserted into the reversing groove 422 through the connecting plate 2112, so that the piston rod can be retracted into the hydraulic cylinder 7. When it is necessary to drive the piston rod of the hydraulic cylinder 7 to extend outward, the turntable 212 is pulled outward, the turntable 212 drives the rotating shaft 211, the rotating shaft 211 drives the rotating rod 214 to slide in the rotating shaft 21, the rotating shaft 211 drives the rotating plate 2111, the rotating plate 2111 drives the positioning plate 2113 to move out of the reversing groove 422 through the connecting plate 2112, the turntable 212 is rotated 90° in the opposite direction, so that the rotating shaft 21 drives the valve body 2 to rotate 90°, align the positioning plate 2113 with the conversion groove 421, and the turntable 212 is pushed inward, the turntable 212 drives the rotating shaft 211, the rotating shaft 211 drives the rotating rod 214, the rotating shaft 211 drives the rotating plate 2111, and the rotating plate 2111 drives the positioning plate 2113 to be inserted into the conversion groove 421 through the connecting plate 2112, so that the piston rod can extend out of the hydraulic cylinder 7.

[0046] The inner wall of the valve housing 1 is provided with a plurality of first annular grooves 112, and each of the four first branch pipes 121, the four second branch pipes 131, the first oil pipe a14, the second oil pipe a15, the third oil pipe a16, the fourth oil pipe a17, the first oil pipe b18, the second oil pipe b19, the third oil pipe b110 and the fourth oil pipe b111 corresponds to a first annular groove 112; a first sealing ring 113 is provided in the first annular groove 112, and the first sealing ring 113 is attached to the valve housing 1. The valve body 2 is arranged on the circumferential surface of the valve housing 1, and a plurality of first oil passages 114 are arranged in the valve housing 1, and the first oil passages 114 correspond to the first annular grooves 112 one by one. One end of the first oil passage 114 is connected to the end of the first annular groove 112 away from the valve body 2, and the other end of the first oil passage 114 is connected to the outer circumferential surface of the valve housing 1; an auxiliary oil pipe 115 is inserted into the inner wall of the end of the first oil passage 114 away from the first annular groove 112, and an oil filling mechanism 5 for filling oil into the auxiliary oil pipe 115 is installed on the side of the bearing support plate 11.

[0047] When it is necessary to inject hydraulic oil into the first annular groove 112, the oil injection mechanism 5 injects hydraulic oil into the auxiliary oil pipe 115, and the hydraulic oil enters the first annular groove 112. The hydraulic oil pushes the first sealing ring 113, and the first sealing ring 113 is pressed against the peripheral surface of the valve body 2 to seal the pores between the flow channels.

[0048] Second annular grooves 217 are provided outside the two end ports of the first oil inlet passage 22, the first oil discharge passage 26, the second oil inlet passage 23, the third oil inlet passage 24, the fourth oil inlet passage 25, the second oil discharge passage 27, the third oil discharge passage 28 and the fourth oil discharge passage 29, and a second sealing ring 218 is embedded in the second annular groove 217. The second sealing ring 218 is attached to the inner circumferential surface of the valve housing 1, and the second sealing ring 218 is attached to the first sealing ring 113; after the second sealing ring 218 moves away from the first sealing ring 113, the second sealing ring 218 is attached to the inner wall of the valve housing 1 to seal the ports of the first oil inlet passage 22, the first oil discharge passage 26, the second oil inlet passage 23, the third oil inlet passage 24, the fourth oil inlet passage 25, the second oil discharge passage 27, the third oil discharge passage 28 and the fourth oil discharge passage 29.

[0049] The oil filling mechanism 5 includes a piston head 51, a first spring 52 and a main oil pipe 53; an oil chamber 215 is provided in the rotating shaft 21, the oil chamber 215 is connected to the end face of the rotating shaft 21, the oil chamber 215 is cylindrical, the rotating rod 214 is located in the oil chamber 215, the end face of the rotating shaft 21 is connected to a sealing cover 216, and the rotating rod 214 passes through the sealing cover 216; the piston head 51 is connected to the end of the rotating rod 214, and the piston head 51 slides on the inner wall of the oil chamber 215; the first spring 52 is sleeved outside the rotating rod 214, one end of the first spring 52 is pressed against the end face of the piston head 51 close to the sealing cover 216, and the first spring 52 The other end is pressed against the side of the sealing cover 216 close to the piston head 51; there are four main oil pipes 53, one end of the four main oil pipes 53 is connected to the end of the oil chamber 215 close to the rotating shaft 211, the other end of one of the main oil pipes 53 is connected to the end of the four auxiliary oil pipes 115 close to the oil inlet pipe 12, the other end of another main oil pipe 53 is connected to the end of the four auxiliary oil pipes 115 close to the oil outlet pipe 13, the other end of another main oil pipe 53 is connected to the four auxiliary oil pipes 115 close to the oil pipe a, and the other end of the remaining main oil pipe 53 is connected to the end of the four auxiliary oil pipes 115 close to the oil pipe b.

[0050] When it is necessary to release the pressure of the first sealing ring 113 on the back of the valve body 2, the rotary disk 212 is pulled outward, and the rotary disk 212 drives the rotating rod 214 to move through the rotating shaft 211, and the rotating rod 214 drives the piston head 51 to move, and the piston head 51 compresses the first spring 52. At this time, the piston head 51 extracts the hydraulic oil in the first annular groove 112 through the main oil pipe 53 and the auxiliary oil pipe 115, and the pressure of the first sealing ring 113 on the valve body 2 can be released; when the first sealing ring 113 is needed to press the valve body 2, the rotary disk 212 is released, the first spring 52 is reset, the first spring 52 pushes the piston head 51, and the piston head 51 pushes the hydraulic oil in the oil chamber 215. The hydraulic oil is squeezed into the first annular groove 112 through the main oil pipe 53 and the auxiliary oil pipe 115, and the hydraulic oil pushes the first sealing ring 113 to press against the surface of the valve body 2.

[0051] The implementation principle of a hydraulic valve in an embodiment of the present application is: when using the hydraulic valve 01, hydraulic oil is injected into the oil inlet pipe 12, the hydraulic oil enters the oil inlet channel, and the hydraulic oil is discharged into the oil pipe a, and then enters one end of the cavity of the hydraulic cylinder 7; the hydraulic oil in the hydraulic cylinder 7 drives the piston to move, and the piston presses the hydraulic oil at the other end of the hydraulic cylinder 7 into the oil pipe b, and the hydraulic oil in the oil pipe b enters the oil discharge channel, and the hydraulic oil in the oil discharge channel is discharged into the oil outlet pipe 13. The drive shaft 21 rotates 90°, and the shaft 21 drives the valve body 2 to rotate 90°, then the port of the oil inlet passage originally aligned with the oil inlet pipe 12 is rotated to align with the oil pipe b, the port of the oil inlet passage originally aligned with the oil pipe a is rotated to align with the oil inlet pipe 12, the port of the oil discharge passage originally aligned with the oil outlet pipe 13 is rotated to align with the oil pipe a, and the port of the oil discharge passage originally aligned with the oil pipe b is rotated to align with the oil outlet pipe 13; inject hydraulic oil into the oil inlet pipe 12 again, the hydraulic oil enters the oil inlet passage, and the hydraulic oil is discharged into the oil pipe b, and then Then it enters the other end of the cavity of the hydraulic cylinder 7; the hydraulic oil in the hydraulic cylinder 7 drives the piston to move, and the piston presses the hydraulic oil at the other end of the hydraulic oil into the oil pipe a, and the hydraulic oil in the oil pipe a then enters the oil discharge oil channel, and the hydraulic oil in the oil discharge oil channel is discharged into the oil outlet pipe 13; the above technical solution only needs to set up an oil outlet pipe 13 to realize the hydraulic oil reflux at both ends of the piston of the hydraulic cylinder 7, and the hydraulic valve 01 is small in size and occupies a small space, which makes the hydraulic valve 01 more convenient to install and arrange.

[0052] The hydraulic system includes a hydraulic valve 01, an oil tank 6, a hydraulic cylinder 7, a control valve 8 and an oil pump. The oil pump is installed at the bottom of the oil tank 6. The middle position of the oil inlet pipe 12 is connected to an oil pipeline 61, and the middle position of the oil outlet pipe 13 is connected to an oil return pipeline 62; the end of the oil pipeline 61 away from the hydraulic valve 01 is connected to the oil pump, the control valve 8 is connected to the oil pipeline 61, and the end of the oil return pipeline 62 away from the hydraulic valve 01 is connected to the top side of the oil tank 6; four hydraulic cylinders 7 are provided, and the four hydraulic cylinders 7 correspond to four groups of oil pipes a and oil pipes b.

[0053] Since the hydraulic oil in the four hydraulic cylinders 7 enters the hydraulic oil through the same oil inlet pipe 12 and is discharged from the same oil outlet pipe 13 and return oil pipeline 62, the layout of pipelines is reduced, making the layout of the hydraulic valve 01 more convenient; the oil pump draws the hydraulic oil into the oil pipeline 61, and then enters the oil inlet pipe 12, and flows to the four first branch pipes 121 through the oil inlet pipe 12, the control valve 8 controls the flow of the oil pipeline 61, the hydraulic oil in the oil inlet pipe 12 enters the hydraulic valve 01, the hydraulic valve 01 controls the hydraulic oil in the hydraulic cylinder 7 to flow out into the hydraulic valve 01, the hydraulic oil in the hydraulic valve 01 enters the oil outlet pipe 13 through the second branch pipe 131, and then enters the return oil pipeline 62 through the oil outlet pipe 13, and then enters the oil tank 6.

[0054] The control valve 8 includes a seat body 81, a valve stem 82 and a second spring 83. A sliding groove 811 is arranged in the seat body 81. The sliding groove 811 is cylindrical. The valve stem 82 slides on the inner wall of the sliding groove 811. The second spring 83 is arranged in the sliding groove 811. One end of the second spring 83 is pressed against the inner wall of the sliding groove 811, and the other end of the second spring 83 is pressed against the end face of the valve stem 82. The end face of the valve stem 82 away from the second spring 83 is connected with a push-pull rod 821, and the push-pull rod 821 passes through the end face of the seat body 81; a through hole 822 is arranged in the valve stem 82 and passes through the circumferential surface of the valve stem 82. The through hole 822 is used to connect to the oil pipeline 61.

[0055] When the oil inlet pipe 12 is required to draw the hydraulic oil into the hydraulic valve 01, the push-pull rod 821 is pushed downward, the push-pull rod 821 presses down the valve stem 82, the valve stem 82 slides in the sliding groove 811, the valve stem 82 compresses the second spring 83 downward, the through hole 822 gradually aligns with the oil inlet pipe 12, and the hydraulic oil in the oil inlet pipe 12 flows into the hydraulic valve 01 through the through hole 822; by adjusting the position of the valve stem 82, the amount of hydraulic oil flowing through the through hole 822 can be controlled; the valve stem 82 is released, and under the action of the second spring 83, the valve stem 82 gradually resets, the through hole 822 moves away from the oil inlet pipe 12, and the valve stem 82 cuts off the hydraulic oil flowing in the oil inlet pipe 12.

[0056] The implementation principle of a hydraulic system of an embodiment of the present application is as follows: the oil pump draws the hydraulic oil into the oil pipeline 61, then enters the oil inlet pipe 12, flows to the four first branch pipes 121 through the oil inlet pipe 12, the control valve 8 controls the flow of the oil pipeline 61, the hydraulic oil in the oil inlet pipe 12 enters the hydraulic valve 01, the hydraulic valve 01 controls the hydraulic oil in the hydraulic cylinder 7 to flow out to the hydraulic valve 01, the hydraulic oil in the hydraulic valve 01 enters the oil outlet pipe 13 through the second branch pipe 131, enters the return oil pipeline 62 through the oil outlet pipe 13, and then enters the oil tank 6.

[0057] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A hydraulic valve, characterized in that: The invention comprises a valve housing (1) and a valve body (2), wherein the valve body (2) rotates on the inner wall of the valve housing (1); the two end surfaces of the valve housing (1) are connected to bearing support plates (11), and the two end surfaces of the valve body (2) are coaxially connected to rotating shafts (21), and the two rotating shafts (21) are respectively rotatably connected to the two bearing support plates (11); an oil inlet passage is provided in the valve body (2), and the two ends of the oil inlet passage are connected to the peripheral surface of the valve body (2); an oil discharge passage is provided in the valve body (2), and the two ends of the oil discharge passage are connected to the peripheral surface of the valve body (2); the oil inlet passage and the oil discharge passage are connected to the peripheral surface of the valve body (2); The valve body (2) is axially symmetrical; the circumferential surface of the valve housing (1) is connected to an oil inlet pipe (12) and an oil outlet pipe (13); the oil inlet pipe (12) is connected to one end of the oil inlet passage and is used for hydraulic oil to enter; the oil outlet pipe (13) is connected to one end of the oil outlet passage and is used for hydraulic oil to discharge; the circumferential surface of the valve housing (1) is connected to an oil pipe a and an oil pipe b; one end of the oil pipe a is connected to the other end of the oil inlet passage and one end of the oil pipe b is connected to the other end of the oil outlet passage; the other ends of the oil pipe a and the oil pipe b are used to respectively connect to the two ends of the inner cavity of the hydraulic cylinder (7); The valve body (2) is provided with four oil inlet passages and four oil discharge passages, which are arranged in sequence along the axis direction of the valve body (2) as a first oil inlet passage (22), a second oil inlet passage (23), a third oil inlet passage (24) and a fourth oil inlet passage (25), and in sequence along the axis direction of the valve body (2) as a first oil discharge passage (26), a second oil discharge passage (27), a third oil discharge passage (28) and a fourth oil discharge passage (29); the circumferential surface of the valve housing (1) is connected with four oil pipes a and four oil pipes b, which are arranged in sequence as a first oil pipe a (14), a second oil pipe a (15), a third oil pipe a (16) and a fourth oil pipe a (17), and in sequence as a first oil pipe b (18), a second oil pipe b (19), a third oil pipe b (110) and a fourth oil pipe b (111); the four oil inlet passages correspond to the four oil pipes a one-to-one, and the four oil discharge passages correspond to the four oil pipes b one-to-one; The oil inlet pipe (12) is connected to four first branch pipes (121) on its circumference, the first branch pipes (121) are plugged into the valve housing (1), and the four first branch pipes (121) are used to be connected to one end of four oil inlet passages respectively; the oil outlet pipe (13) is connected to four second branch pipes (131) on its circumference, the second branch pipes (131) are plugged into the valve housing (1), and the four second branch pipes (131) are used to be connected to one end of four oil outlet passages respectively; The end surface of the rotating shaft (21) is provided with a rotating shaft (211), the end of the rotating shaft (211) is connected to a rotating disk (212), the peripheral surface of the rotating shaft (211) is connected to a rotating plate (2111), the end of the rotating plate (2111) is connected to a connecting plate (2112), the end of the connecting plate (2112) away from the rotating plate (2111) is connected to a positioning plate (2113), the positioning plate (2113) is attached to the side surface of the bearing support plate (11), and the side surface of the bearing support plate (11) is provided with a positioning mechanism (4) for fixing the positioning plate (2113); The circumferential surface of the rotating shaft (21) is connected to two baffles (213), the two baffles (213) are respectively located on two side surfaces of the connecting plate (2112), the baffles (213) are attached to the side surfaces of the connecting plate (2112), and the top surfaces of the baffles (213) are flush with the end surfaces of the rotating shaft (21); The end surface of the rotating shaft (211) away from the rotating disk (212) is coaxially connected to a rotating rod (214), and the rotating rod (214) slides in the rotating shaft (21); the positioning mechanism (4) comprises a cover plate (41) and a limit plate (42), both ends of the cover plate (41) are connected to a vertical plate (411), the end of the vertical plate (411) is connected to the side of the bearing support plate (11), the limit plate (42) is located between the two vertical plates (411), the two ends of the limit plate (42) are connected to the side surfaces of the two vertical plates (411) close to each other, the limit plate (42) is connected to the side of the bearing support plate (11), one end of the limit plate (42) is provided with four conversion grooves (421) for inserting the positioning plate (2113), and the other end of the limit plate (42) is provided with four reversing grooves (422) for inserting the positioning plate (2113); The inner wall of the valve housing (1) is provided with a plurality of first annular grooves (112); each of the four first branch pipes (121), the four second branch pipes (131), the first oil pipe a (14), the second oil pipe a (15), the third oil pipe a (16), the fourth oil pipe a (17), the first oil pipe b (18), the second oil pipe b (19), the third oil pipe b (110) and the fourth oil pipe b (111) corresponds to one of the first annular grooves (112); a first sealing ring (113) is provided in the first annular groove (112); the first sealing ring (113) is fitted on the first annular groove (112); The valve body (2) is surrounded by a plurality of first oil passages (114), and the valve housing (1) is provided with a plurality of first oil passages (114), the first oil passages (114) corresponding to the first annular grooves (112) one by one, one end of the first oil passage (114) is connected to the end of the first annular groove (112) away from the valve body (2), and the other end of the first oil passage (114) is connected to the outer peripheral surface of the valve housing (1); an auxiliary oil pipe (115) is inserted into the inner wall of the end of the first oil passage (114) away from the first annular groove (112), and an oil injection mechanism (5) for injecting oil into the auxiliary oil pipe (115) is installed on the side of the bearing support plate (11); The oil injection mechanism (5) comprises a piston head (51), a first spring (52) and a main oil pipe (53); an oil chamber (215) is arranged inside the rotating shaft (21), the oil chamber (215) is connected to the end face of the rotating shaft (21), the oil chamber (215) is cylindrical, the rotating rod (214) is located inside the oil chamber (215), the end face of the rotating shaft (21) is connected to a sealing cover (216), and the rotating rod (214) passes through the sealing cover (216); the piston head (51) is connected to the end of the rotating rod (214), and the piston head (51) slides on the inner wall of the oil chamber (215); the first spring (52) is sleeved outside the rotating rod (214), and one end of the first spring (52) is pressed against the piston head (51) near the sealing cover (216). end surface, the other end of the first spring (52) is pressed against the side surface of the sealing cover (216) close to the piston head (51); four main oil pipes (53) are provided, one end of the four main oil pipes (53) is connected to the end of the oil chamber (215) close to the rotating shaft (211), the other end of one of the main oil pipes (53) is connected to the end of the four auxiliary oil pipes (115) close to the oil inlet pipe (12), the other end of another main oil pipe (53) is connected to the end of the four auxiliary oil pipes (115) close to the oil outlet pipe (13), the other end of another main oil pipe (53) is connected to the four auxiliary oil pipes (115) close to the oil pipe a, and the other end of the remaining main oil pipe (53) is connected to the end of the four auxiliary oil pipes (115) close to the oil pipe b.

2. A hydraulic system, applicable to the hydraulic valve according to any one of claims 1, characterized in that: The invention comprises a hydraulic valve (01), an oil tank (6), a hydraulic cylinder (7), a control valve (8) and an oil pump. The oil pump is installed at the bottom of the oil tank (6). The middle position of the oil inlet pipe (12) is connected to an oil delivery pipeline (61), and the middle position of the oil outlet pipe (13) is connected to an oil return pipeline (62). The end of the oil delivery pipeline (61) away from the hydraulic valve (01) is connected to the oil pump. The control valve (8) is connected to the oil delivery pipeline (61). The end of the oil return pipeline (62) away from the hydraulic valve (01) is connected to the top side of the oil tank (6). Four hydraulic cylinders (7) are provided, and the four hydraulic cylinders (7) correspond to four groups of oil pipes a and oil pipes b.

3. A hydraulic system according to claim 2, characterized in that: The control valve (8) comprises a seat body (81), a valve stem (82) and a second spring (83). The seat body (81) is provided with a sliding groove (811), the sliding groove (811) is cylindrical, the valve stem (82) slides on the inner wall of the sliding groove (811), the second spring (83) is arranged in the sliding groove (811), one end of the second spring (83) is pressed against the inner wall of the sliding groove (811), and the other end of the second spring (83) is pressed against the end face of the valve stem (82), the end face of the valve stem (82) away from the second spring (83) is connected with a push-pull rod (821), and the push-pull rod (821) passes through the end face of the seat body (81); the valve stem (82) is provided with a through hole (822) penetrating the circumference of the valve stem (82), and the through hole (822) is used to connect with the oil pipeline (61).

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