Hydraulic system

Abstract

The invention belongs to a hydraulic system which comprises an oil cylinder, the oil cylinder is connected with a reverser through two parallel pipelines, one pipeline is an oil suction pipeline, a hydraulic pump is arranged in the middle of the oil suction pipeline, a filter is further connected between the hydraulic pump and the oil cylinder, and an overflow valve and an adjustable throttling valve are arranged between the hydraulic pump and the reverser. The overflow valve is connected with the oil cylinder through a third pipeline below the adjustable throttle valve, the other pipeline is an oil discharge pipeline, a buffer structure is arranged in the middle, a valve is arranged below the buffer structure, a telescopic column is arranged above the reverser, a plugging column is arranged in the telescopic column, and the other side of the plugging column is connected with the workbench. The oil suction speed is adjusted through the overflow valve and the adjustable throttling valve, the situation of oil leakage caused by damage to a connecting part due to rapid ascending is avoided, the descending speed is buffered through the buffering structure, oil leakage caused by damage to the connecting part due to rapid descending is avoided, and then the service life of the oil suction device is guaranteed.

Description

Technical Field

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

[0002] The hydraulic system is a mechanical system that uses liquid as a medium to transfer energy and force. It achieves energy conversion and transmission through the pressure and circulation of liquid. The workbench hydraulic system is a system that can achieve precise control and movement of the workbench. It is widely used in industrial machinery, construction equipment and other fields, especially in places where the position and movement of the workbench need to be precisely controlled. The common workbench hydraulic system has linkage, but the stability of the rising and falling process is poor. Too fast lifting and lowering often affects the connection between the parts of the hydraulic system, which is easy to cause internal liquid leakage and waste, affecting the work effect. Because it is a linkage operation, it is usually impossible to adjust the height of a single support leg, and the accuracy of the linkage cannot be accurately controlled.

[0003] In summary, the prior art has the problems of being unable to lift a single support leg, the lifting height is not precise enough, and the rising and lowering speeds are too fast, which may damage the components and easily cause internal liquid leakage. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of the present invention to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] Therefore, the purpose of the present invention is to provide a hydraulic system that can solve the problems of the prior art that a single support leg cannot be lifted or lowered, the lifting height is not accurate enough, and the rising and falling speed is too fast, which may damage the parts and cause internal liquid leakage. The present invention provides a hydraulic system, which includes an oil cylinder, the oil cylinder is connected to a diverter through two parallel pipes, one of which is an oil suction pipe, a hydraulic pump is arranged in the middle, a filter is also connected between the hydraulic pump and the oil cylinder, an overflow valve and an adjustable flow valve are arranged between the hydraulic pump and the diverter, the overflow valve is connected to the oil cylinder through a third pipe below the adjustable flow valve, the other is an oil discharge pipe, a buffer structure is arranged in the middle, a valve is arranged below the buffer structure, a telescopic column is arranged above the diverter, a blocking column is arranged inside the telescopic column, and the other side of the blocking column is connected to the workbench.

[0006] Optionally, the buffer structure has three layers, the first layer has a first slide groove on the left side, the first slide groove is connected to the first movable plate, the other side of the first movable plate has a first fixed plate fixedly connected to the right side, the second layer has a second fixed plate fixedly connected to the left side, the second fixed plate has a second movable plate connected to the second slide groove on the right side on the right side, the third layer has a third slide groove on the left side, the third slide groove is connected to the third movable plate, and the other side of the third movable plate is connected to the third fixed plate fixedly connected to the right side.

[0007] Optionally, the height of the first slide groove is greater than the height of the second slide groove, and the height of the second slide groove is greater than the height of the third slide groove.

[0008] Optionally, the sum of the lengths of the first fixed plate and the first movable plate is equal to the sum of the lengths of the second fixed plate and the second movable plate, equal to the sum of the third movable plate and the third fixed plate, and equal to the inner length of the buffer structure.

[0009] Optionally, there are scale lines on the front of the telescopic column, the hydraulic system is integrated inside the supporting foot, and a sealing door is provided on one side of the supporting foot corresponding to the oil cylinder, and the sealing door has a handle.

[0010] Optionally, a controller is provided on the upper part of the supporting leg, a display screen is provided above the controller, and a speed adjustment knob and a lifting knob are provided below the display screen.

[0011] Optionally, the speed regulating knob is connected to the adjustable flow valve, the lifting knob is connected to the commutator, and the valve is engaged with the lifting knob gear via a gear structure.

[0012] Optionally, a layer of wood wax oil is formed on the surfaces of the first movable board, the second movable board and the third movable board.

[0013] In summary, the present invention includes at least one of the following beneficial effects: The present invention adopts four separate hydraulic systems to control four supporting feet, which can meet the demand of tilting the workbench and has higher flexibility.

[0014] The present invention controls the uniform flow rate inside the oil inlet pipe and the oil suction pipe through the overflow valve and the adjustable flow valve. The adjustable flow valve controls the rising speed by controlling the flow rate, and cooperates with the scale line on the outside of the telescopic column to ensure that the lifting height is not accurate enough. The buffer structure is then used to buffer the descending liquid to avoid damage to the connection of the system caused by a sudden deceleration, thereby extending the service life of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is an overall schematic diagram of the application structure of a hydraulic system of the present invention; Figure 2 It is a schematic diagram of the application structure of a hydraulic system of the present invention; Figure 3 A hydraulic system schematic diagram of a hydraulic system of the present invention; Figure 4 A schematic diagram of a buffer structure of a hydraulic system of the present invention; List of illustrations: 1. Workbench; 2. Telescopic column; 3. Support foot; 4. Controller; 5. Display screen; 6. Speed ​​knob; 7. Handle; 8. Sealing door; 9. Scale line; 10. Lifting knob; 11. Cylinder; 12. Filter; 13. Hydraulic pump; 14. Overflow valve; 15. Reverser; 16. Adjustable flow valve; 17. Blocking column; 18. Buffer structure; 19. Valve; 20. First slide groove; 21. Second fixed plate; 22. First movable plate; 23. First fixed plate; 24. Second slide groove; 25. Third movable plate; 26. Second movable plate; 27. Third slide groove; 28. Third fixed plate. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-4 The present invention is described in further detail.

[0018] Embodiment 1, refer to Figure 1-4 In order to solve the problems that the existing technology cannot lift a single support leg, the lifting height is not accurate enough, and the rising and falling speed is too fast, which may damage the parts and cause internal liquid leakage. The present invention discloses a hydraulic system, including an oil cylinder 11, which is connected to a diverter 15 through two parallel pipes, one of which is an oil suction pipe, a hydraulic pump 13 is arranged in the middle, a filter 12 is also connected between the hydraulic pump 13 and the oil cylinder 11, an overflow valve 14 and an adjustable flow valve 16 are arranged between the hydraulic pump 13 and the diverter 15, the overflow valve 14 is connected to the oil cylinder 11 through a third pipe below the adjustable flow valve 16, the other is an oil discharge pipe, a buffer structure 18 is arranged in the middle, a valve 19 is arranged below the buffer structure 18, a telescopic column 2 is arranged above the diverter 15, a blocking column 17 is arranged inside the telescopic column 2, and the other side of the blocking column 17 is connected to the workbench 1.

[0019] By setting an overflow valve 14 on the oil suction pipe, the oil sucked up by the hydraulic pump 13 is controlled. Excess oil will flow back into the oil cylinder 11 through the overflow valve 14, and the flow rate of the oil in the oil suction pipe is controlled to be uniform. The flow rate is then adjusted by the adjustable flow valve 16 to adjust the rising speed. The slower the speed, the more accurate the height can be positioned. The buffer structure 18 is used to buffer the descending speed to avoid leakage caused by damage to the connection position due to too fast a descending speed. The filter 12 is set to filter the oil to avoid clogging the pipeline with a large number of impurities.

[0020] The buffer structure 18 has three layers. A first slide groove 20 is provided on the left side of the first layer. The first slide groove 20 is connected to the first movable plate 22. A first fixed plate 23 fixedly connected to the right side is provided on the other side of the first movable plate 22. A second fixed plate 21 is fixedly connected to the left side of the second layer. A second movable plate 26 connected to the second slide groove 24 on the right side is provided on the right side of the second fixed plate 21. A third slide groove 27 is provided on the left side of the third layer. The third slide groove 27 is connected to the third movable plate 25. The other side of the third movable plate 25 is connected to the third fixed plate 28 fixedly connected to the right side. The height of the first slide groove 20 is greater than the height of the second slide groove 24. The height of the second slide groove 24 is greater than the height of the third slide groove 27. The sum of the lengths of the first fixed plate 23 and the first movable plate 22 is equal to the sum of the second fixed plate 21 and the second movable plate 26. The sum of the third movable plate 25 and the third fixed plate 28 is equal to the internal length of the buffer structure 18. A layer of wood wax oil is provided on the surfaces of the first movable plate 22, the second movable plate 26 and the third movable plate 25.

[0021] By setting the first slide groove 20, the second slide groove 24 and the third slide groove 27 at different heights, the flow rate decreases gradually from high to low. When the weight of the oil is not enough to move the first movable plate 22, the second movable plate 26 and the third movable plate 25 downward, they will remain on each layer, avoiding unnecessary damage caused by the instantaneous acceleration of the descent caused by the sudden injection of oil into the buffer structure 18 during descent.

[0022] There is a scale line 9 on the front of the telescopic column 2, and the hydraulic system is integrated inside the supporting foot 3. A sealing door 8 is provided on one side of the supporting foot 3 corresponding to the oil cylinder 11, and a handle 7 is provided on the sealing door 8. A controller 4 is provided on the upper part of the supporting foot 3, and a display screen 5 is provided above the controller 4. A speed regulating knob 6 and a lifting knob 10 are provided below the display screen 5. The speed regulating knob 6 is connected to an adjustable flow valve 16, and the lifting knob 10 is connected to a commutator 15. The valve 19 is connected to the lifting knob 10 gear through a gear structure.

[0023] The height of the lift can be observed through the scale line 9 and adjusted in time, with higher accuracy. The setting of the sealing door 8 can facilitate the maintenance of the hydraulic system. The speed knob 6 and the lifting knob 10 are integrated on the controller 4, which is more convenient to operate. The valve 19 is provided with a gear. The gear is driven by pressing the lifting knob 10 to close and open the valve 19. The lifting knob 10 rotates to adjust the position of the commutator 15 to meet the rise, stay or fall of the workbench 1. The speed knob 6 controls the opening size of the adjustable flow valve 16, controls the flow rate and thus controls the rising speed of the workbench 1.

[0024] Specific implementation principle: When using the present invention, the height of each support leg 3 should be determined according to the needs. Taking one of the support legs 3 as an example, the hydraulic pump 13 is started first, and the system starts to operate. The oil is filtered through the filter 12 to prevent the oil of impurities from entering the pipeline and causing blockage. The overflow valve 14 filters the oil brought by the hydraulic pump 13 to ensure the stability of the flow rate inside the oil suction pipeline. The lifting knob 10 is rotated to connect the commutator 15 and the oil suction pipeline. The oil pushes the blockage 17 through the commutator 15 to make the telescopic column 2 rise. When more precise operation is required, When the rising height is accurately positioned, the speed knob 6 is rotated, and the speed knob 6 controls the adjustable flow valve 16. The flow rate can be observed through the display screen 5, and the rising height can be observed through the scale line 9. After determining the height, the lifting knob 10 is rotated to make the commutator 15 stay in the blocking position. When descending, the lifting knob 10 is pressed inward, and the gear connected to the valve 19 is turned. The valve 19 opens, and the lifting knob 10 is rotated to connect the commutator 15 to the oil discharge pipeline, enter the buffer structure 18 for buffering, and finally fall into the oil cylinder 11. During subsequent cleaning and maintenance, the sealing door 8 can be opened by pulling the handle 7, which is more convenient to operate.

[0025] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic system, characterized in that: The invention comprises an oil cylinder (11), wherein the oil cylinder (11) is connected to a reversing device (15) via two parallel pipes, one of which is an oil suction pipe with a hydraulic pump (13) arranged in the middle, a filter (12) is also connected between the hydraulic pump (13) and the oil cylinder (11), an overflow valve (14) and an adjustable flow valve (16) are arranged between the hydraulic pump (13) and the reversing device (15), the overflow valve (14) is connected to the oil cylinder (11) via a third pipe below the adjustable flow valve (16), the other is an oil discharge pipe with a buffer structure (18) arranged in the middle, a valve (19) is arranged below the buffer structure (18), a telescopic column (2) is arranged above the reversing device (15), a blocking column (17) is arranged inside the telescopic column (2), and the other side of the blocking column (17) is connected to a workbench (1).

2. A hydraulic system according to claim 1, characterized in that: The buffer structure (18) has three layers, the first layer has a first slide groove (20) on the left side, the first slide groove (20) is connected to the first movable plate (22), the first movable plate (22) has a first fixed plate (23) fixedly connected to the right side on the other side, the second layer has a second fixed plate (21) fixedly connected to the left side, the second fixed plate (21) has a second movable plate (26) connected to the second slide groove (24) on the right side, the third layer has a third slide groove (27) on the left side, the third slide groove (27) is connected to the third movable plate (25), the third movable plate (25) has a third fixed plate (28) fixedly connected to the right side on the other side.

3. A hydraulic system according to claim 2, characterized in that: The height of the first sliding groove (20) is greater than the height of the second sliding groove (24), and the height of the second sliding groove (24) is greater than the height of the third sliding groove (27).

4. A hydraulic system according to claim 2, characterized in that: The sum of the lengths of the first fixed plate (23) and the first movable plate (22) is equal to the sum of the lengths of the second fixed plate (21) and the second movable plate (26), equal to the sum of the lengths of the third movable plate (25) and the third fixed plate (28), and equal to the internal length of the buffer structure (18).

5. A hydraulic system according to claim 1, characterized in that: The telescopic column (2) has a scale line (9) on the front side, the hydraulic system is integrated inside the supporting foot (3), and a sealing door (8) is provided on one side of the supporting foot (3) corresponding to the oil cylinder (11), and a handle (7) is provided on the sealing door (8).

6. A hydraulic system according to claim 5, characterized in that: The upper part of the support foot (3) is provided with a controller (4), a display screen (5) is provided above the controller (4), and a speed adjustment knob (6) and a lifting knob (10) are provided below the display screen (5).

7. A hydraulic system according to claim 6, characterized in that: The speed regulating knob (6) is connected to the adjustable flow valve (16), the lifting knob (10) is connected to the commutator (15), and the valve (19) is gear-engaged with the lifting knob (10) via a gear structure.

8. A hydraulic system according to claim 2, characterized in that: A layer of wood wax oil is formed on the surfaces of the first movable plate (22), the second movable plate (26) and the third movable plate (25).

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