Hydraulic control system of a water intake and retraction device and its control method

Abstract

A hydraulic control system for a water intake retracting device, comprising an oil tank, a series variable pump, a loading overflow valve group, a drum motor control valve group, a drum motor balance valve group, a pin cylinder control valve group, a lifting cylinder control valve group and a lifting cylinder balance valve group. The oil outlet of the oil tank is communicated with the oil inlet end of the series variable pump. The oil outlet end of the series variable pump is communicated with the oil inlet ends of the drum motor control valve group, the pin cylinder control valve group and the lifting cylinder control valve group respectively after passing through the loading overflow valve group. The oil outlet end of the drum motor control valve group is communicated with the oil inlet of the drum motor after passing through the drum motor balance valve group. The oil outlet end of the pin cylinder control valve group is communicated with the oil ports of the upper ring beam pin cylinder and the lower ring beam pin cylinder respectively. The oil outlet end of the lifting cylinder control valve group is communicated with the oil port of the lifting cylinder after passing through the lifting cylinder balance valve group. This design is not only simple to operate, highly efficient, but also highly reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic control, and particularly relates to a hydraulic control system and a control method for a water intake retracting device. Background Art

[0002] At present, most of the water intake hose retracting systems adopt a horizontal type. This kind of structure is simple, but has high requirements for space. For example, for the water intake hoses of mobile aquaculture ships, in order to save space, it is necessary to retract and release the hoses from a fixed position and be able to safely take and release seawater at different water layers. The above usage requirements can be met by a vertical drum winch and a set of retracting and lifting devices. However, at present, there is no hydraulic control system that can simultaneously control the vertical drum winch and the retracting and lifting devices, resulting in inconvenient and inefficient retracting and releasing of the water intake hoses. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects and problems of inconvenient operation and low efficiency in the prior art, and provide a hydraulic control system and a control method for a water intake retracting device with simple operation and high efficiency.

[0004] To achieve the above purpose, the technical solution of the present invention is: A hydraulic control system for a water intake retracting device, the hydraulic control system includes an oil tank, a series variable pump, a drum motor control valve group, a pin cylinder control valve group, and a lifting cylinder control valve group. The oil outlet of the oil tank is communicated with the inlet end of the series variable pump, the outlet end of the series variable pump is respectively communicated with the inlet ends of the drum motor control valve group, the pin cylinder control valve group, and the lifting cylinder control valve group. The outlet end of the drum motor control valve group is communicated with the inlet port of the drum motor, the outlet end of the pin cylinder control valve group is respectively communicated with the oil ports of the upper ring beam pin cylinder and the lower ring beam pin cylinder, and the outlet end of the lifting cylinder control valve group is communicated with the oil port of the lifting cylinder.

[0005] The series variable pump includes a first variable pump and a second variable pump. The inlet end of the first variable pump is communicated with the oil outlet of the oil tank, and the outlet end of the first variable pump is communicated with the drum motor control valve group. The inlet end of the second variable pump is communicated with the oil outlet of the oil tank, and the outlet end of the second variable pump is respectively communicated with the inlet ends of the pin cylinder control valve group and the lifting cylinder control valve group.

[0006] The hydraulic control system further includes a loading overflow valve group, which includes a first overflow valve, a second overflow valve, a first check valve, and a second check valve. The inlet ends of the first overflow valve, the second overflow valve, the first check valve, and the second check valve are respectively communicated with the outlet end of the series variable pump. The outlet ends of the first overflow valve and the second overflow valve are respectively communicated with the inlet port of the fuel tank. The outlet end of the first check valve is communicated with the inlet end of the drum motor control valve group. The outlet end of the second check valve is respectively communicated with the inlet ends of the pin cylinder control valve group and the lifting cylinder control valve group.

[0007] The drum motor control valve group includes a three-way pressure compensator, a pilot proportional direction valve, and a first shuttle valve. The inlet ends of the three-way pressure compensator and the pilot proportional direction valve are respectively communicated with the outlet end of the series variable pump. The outlet ends of the three-way pressure compensator and the pilot proportional direction valve are respectively communicated with the inlet port of the fuel tank. The working ports a1 and b1 of the pilot proportional direction valve are respectively communicated with the control ports of the first shuttle valve. The outlet end of the first shuttle valve is communicated with the control end of the three-way pressure compensator. The working ports a1 and b1 of the pilot proportional direction valve are communicated with the inlet port of the drum motor.

[0008] The hydraulic control system further includes a drum motor balance valve group, which includes a balance valve and a third overflow valve. The working ends of the balance valve are respectively communicated with the working port a1 of the pilot proportional direction valve, the inlet end of the third overflow valve, and the inlet port of the drum motor. The control end of the balance valve is communicated with the working port b1 of the pilot proportional direction valve. The outlet end of the third overflow valve is communicated with the working port b1 of the pilot proportional direction valve.

[0009] The pin cylinder control valve group includes a first direction valve and a second direction valve. The inlet ends of the first direction valve and the second direction valve are respectively communicated with the outlet end of the series variable pump. The outlet ends of the first direction valve and the second direction valve are respectively communicated with the inlet port of the fuel tank. The working end of the first direction valve is communicated with the oil port of the lower ring beam pin cylinder. The working end of the second direction valve is communicated with the oil port of the upper ring beam pin cylinder.

[0010] The lifting cylinder control valve group includes a two-way pressure compensator, a proportional direction valve, and a second shuttle valve. The inlet end of the two-way pressure compensator is communicated with the outlet end of the series variable pump. The outlet end of the two-way pressure compensator is communicated with the inlet end of the proportional direction valve. The control end of the two-way pressure compensator is communicated with the outlet end of the second shuttle valve. The outlet end of the proportional direction valve is communicated with the inlet port of the fuel tank. The working end of the proportional direction valve is respectively communicated with the control port of the second shuttle valve and the oil port of the lifting cylinder.

[0011] The hydraulic control system further includes a hoisting cylinder balance valve group, and the hoisting cylinder balance valve group includes a two-way balance valve and a fourth overflow valve. The working ends of the two-way balance valve are respectively communicated with the working end of the proportional reversing valve, the rodless cavity of the hoisting cylinder, and the rod cavity of the hoisting cylinder. The oil inlet end of the fourth overflow valve is communicated with the rodless cavity of the hoisting cylinder, and the oil outlet end of the fourth overflow valve is communicated with the oil inlet of the fuel tank.

[0012] The hydraulic control system further includes an oil return filter. The oil inlet end of the oil return filter is respectively communicated with the oil outlet ends of the drum motor control valve group, the pin cylinder control valve group, and the hoisting cylinder control valve group. The oil outlet end of the oil return filter is communicated with the oil inlet of the fuel tank.

[0013] A control method for a hydraulic control system of a water intake retracting and deploying device, the control method comprising the following steps:

[0014] When retracting the hose, first start the series variable pump, then operate the drum motor control valve group to drive the drum motor to rotate so that the vertical drum retracts the hose. Then operate the pin cylinder control valve group to drive the upper ring beam pin cylinder to retract so that the upper ring beam pin is pulled out. Then operate the hoisting cylinder control valve group to drive the hoisting cylinder to extend so that the upper ring beam platform rises. After the hoisting cylinder extends in place, operate the pin cylinder control valve group to drive the upper ring beam pin cylinder to extend so that the upper ring beam pin is inserted. Then operate the hoisting cylinder control valve group to drive the hoisting cylinder to retract. At this time, the lower ring beam pin is released. Then operate the pin cylinder control valve group to drive the lower ring beam pin cylinder to retract. Then operate the hoisting cylinder control valve group to drive the hoisting cylinder to retract so that the lower ring beam platform rises. After the hoisting cylinder retracts in place, operate the pin cylinder control valve group to drive the lower ring beam pin cylinder to extend so that the lower ring beam pin is inserted. Then operate the hoisting cylinder control valve group to drive the hoisting cylinder to extend. At this time, the upper ring beam pin is released. Repeat the above steps until the hose retraction is completed. Then stop operating the drum motor control valve group and shut down the series variable pump;

[0015] When lowering the hose, first start the tandem variable pump, then operate the drum motor control valve group to drive the drum motor to rotate, so that the vertical drum lowers the hose, then operate the latch cylinder control valve group to retract the lower ring beam latch cylinder, so that the lower ring beam latch is pulled out, then operate the lifting cylinder control valve group to extend the lifting cylinder, so that the lower ring beam platform descends, after the lifting cylinder is extended into place, operate the latch cylinder control valve group to extend the lower ring beam latch cylinder, so that the lower ring beam latch is inserted, then operate the lifting cylinder control valve group to extend the lifting cylinder, at this time the upper ring beam latch The pin is loosened, and then the latch cylinder control valve group is operated to retract the upper ring beam latch cylinder to pull out the upper ring beam latch, and then the lifting cylinder control valve group is operated to retract the lifting cylinder to lower the upper ring beam platform. After the lifting cylinder is retracted into place, the latch cylinder control valve group is operated to extend the upper ring beam latch cylinder to insert the upper ring beam latch, and then the lifting cylinder control valve group is operated to retract the lifting cylinder. At this time, the lower ring beam latch is loosened, and the above steps are repeated until the hose is lowered, and then the drum motor control valve group is stopped to shut down the series variable pump.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In a hydraulic control system and control method of a water intake and retracting device of the present invention, the hydraulic control system can not only control the retraction and release of the water intake hose in real time, but also can simultaneously control the vertical drum winch to realize the retraction and release of the water intake hose; at the same time, by cooperatively controlling the lifting cylinder speed of the lifting device and the drum motor speed of the vertical drum winch, the water intake hose can be continuously and efficiently retracted and released; in addition, in order to ensure that the water intake hose is maintained at a suitable bending radius, the upper platform of the lifting device needs to be consistent with the current hose height of the vertical drum, and the lifting device realizes the lifting action through the lifting cylinder, and by controlling the action of the latch cylinder of the upper and lower ring beams, the platform is ensured to be in a locked and safe state. Therefore, the present invention is simple to operate, efficient, and reliable.

[0018] 2. In the hydraulic control system and control method of a water intake and retracting device of the present invention, the loading relief valve group includes a No. 1 relief valve, a No. 2 relief valve, a No. 1 check valve and a No. 2 check valve. The loading relief valve group is added to protect the pressure safety, thereby improving the safety performance of the hydraulic control system; the drum motor control valve group includes a three-way pressure compensator, a pilot proportional reversing valve and a No. 1 shuttle valve to reliably realize the forward and reverse rotation of the drum motor, thereby realizing the retraction and release of the water intake hose; the drum motor balance valve group includes a balance valve and a No. 3 relief valve. The balance valve is normally conducted when the hose is retracted, and the balance valve can hold up the load when it stops. When it is lowered, the oil opens the balance valve through the pilot port, and the No. 3 relief valve is used to prevent the drum motor or pipeline from being damaged when the load is overloaded. Therefore, the present invention has high safety and reliability.

[0019] 3. In the hydraulic control system and its control method of a water intake retracting device according to the present invention, the pin cylinder control valve group includes a first reversing valve and a second reversing valve to reliably achieve the actions of the upper and lower ring beam pin cylinders; the lifting cylinder control valve group includes a two-way pressure compensator, a proportional reversing valve, and a second shuttle valve to achieve synchronous movement of the four lifting cylinders; the lifting cylinder balance valve group includes a two-way balance valve and a fourth overflow valve. The two-way balance valve can support the load when the upper ring beam is lowered and the lower ring beam is lowered, and the fourth overflow valve is used to prevent the load borne by the upper ring beam from being too large and damaging the cylinder or pipeline. Therefore, the present invention has high reliability. Brief Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present invention.

[0021] Figure 2 is Figure 1 a schematic structural diagram of the series variable pump therein.

[0022] Figure 3 is Figure 1 a schematic structural diagram of the loading overflow valve group therein.

[0023] Figure 4 is Figure 1 a schematic structural diagram of the drum motor control valve group and the drum motor balance valve group therein.

[0024] Figure 5 is Figure 1 a schematic structural diagram of the drum motor therein.

[0025] Figure 6 is Figure 1 a schematic structural diagram of the pin cylinder control valve group therein.

[0026] Figure 7 is Figure 1 a schematic structural diagram of the lifting cylinder control valve group therein.

[0027] Figure 8 is Figure 1 a schematic structural diagram of the lifting cylinder balance valve group therein.

[0028] Figure 9 is a schematic structural diagram of the lifting device and the hose reel winch.

[0029] Figure 10 is a schematic structural diagram of the lifting device.

[0030] In the figure: fuel tank 1, series variable pump 2, first variable pump 21, second variable pump 22, load overflow valve group 3, first overflow valve 31, second overflow valve 32, first check valve 33, second check valve 34, drum motor control valve group 4, three-way pressure compensator 41, pilot proportional direction valve 42, first shuttle valve 43, drum motor balance valve group 5, balance valve 51, third overflow valve 52, drum motor 6, pin cylinder control valve group 7, first direction valve 71, second direction valve 72, upper ring beam pin cylinder 8, lower ring beam pin cylinder 9, lifting cylinder control valve group 10, two-way pressure compensator 101, proportional direction valve 102, second shuttle valve 103, lifting cylinder balance valve group 11, two-way balance valve 111, fourth overflow valve 112, lifting cylinder 12, return oil filter 13, vertical drum 14, lifting tower 15, hose 16. Detailed implementation mode

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and the detailed implementation mode.

[0032] See Figures 1 to 10 , a hydraulic control system for a water intake and retraction device, the hydraulic control system includes a fuel tank 1, a series variable pump 2, a drum motor control valve group 4, a pin cylinder control valve group 7, and a lifting cylinder control valve group 10. The oil outlet of the fuel tank 1 is communicated with the inlet end of the series variable pump 2. The oil outlet end of the series variable pump 2 is respectively communicated with the inlet ends of the drum motor control valve group 4, the pin cylinder control valve group 7, and the lifting cylinder control valve group 10. The oil outlet end of the drum motor control valve group 4 is communicated with the inlet port of the drum motor 6. The oil outlet end of the pin cylinder control valve group 7 is respectively communicated with the oil ports of the upper ring beam pin cylinder 8 and the lower ring beam pin cylinder 9. The oil outlet end of the lifting cylinder control valve group 10 is communicated with the oil port of the lifting cylinder 12.

[0033] The series variable pump 2 includes a first variable pump 21 and a second variable pump 22. The inlet end of the first variable pump 21 is communicated with the oil outlet of the fuel tank 1, and the outlet end of the first variable pump 21 is communicated with the drum motor control valve group 4. The inlet end of the second variable pump 22 is communicated with the oil outlet of the fuel tank 1, and the outlet end of the second variable pump 22 is respectively communicated with the inlet ends of the pin cylinder control valve group 7 and the lifting cylinder control valve group 10.

[0034] The hydraulic control system further includes a loading overflow valve group 3, and the loading overflow valve group 3 includes a first overflow valve 31, a second overflow valve 32, a first check valve 33, and a second check valve 34. The inlet ends of the first overflow valve 31, the second overflow valve 32, the first check valve 33, and the second check valve 34 are respectively communicated with the outlet end of the series variable pump 2. The outlet ends of the first overflow valve 31 and the second overflow valve 32 are respectively communicated with the inlet of the oil tank 1. The outlet end of the first check valve 33 is communicated with the inlet end of the drum motor control valve group 4. The outlet end of the second check valve 34 is respectively communicated with the inlet ends of the pin cylinder control valve group 7 and the lifting cylinder control valve group 10.

[0035] The drum motor control valve group 4 includes a three-way pressure compensator 41, a pilot proportional directional valve 42, and a first shuttle valve 43. The inlet ends of the three-way pressure compensator 41 and the pilot proportional directional valve 42 are respectively communicated with the outlet end of the series variable pump 2. The outlet ends of the three-way pressure compensator 41 and the pilot proportional directional valve 42 are respectively communicated with the inlet of the oil tank 1. The working ports a1 and b1 of the pilot proportional directional valve 42 are respectively communicated with the control ports of the first shuttle valve 43. The outlet end of the first shuttle valve 43 is communicated with the control end of the three-way pressure compensator 41. The working ports a1 and b1 of the pilot proportional directional valve 42 are communicated with the inlet of the drum motor 6.

[0036] The hydraulic control system further includes a drum motor balance valve group 5, and the drum motor balance valve group 5 includes a balance valve 51 and a third overflow valve 52. The working ends of the balance valve 51 are respectively communicated with the working port a1 of the pilot proportional directional valve 42, the inlet end of the third overflow valve 52, and the inlet of the drum motor 6. The control end of the balance valve 51 is communicated with the working port b1 of the pilot proportional directional valve 42. The outlet end of the third overflow valve 52 is communicated with the working port b1 of the pilot proportional directional valve 42.

[0037] The pin cylinder control valve group 7 includes a first directional valve 71 and a second directional valve 72. The inlet ends of the first directional valve 71 and the second directional valve 72 are respectively communicated with the outlet end of the series variable pump 2. The outlet ends of the first directional valve 71 and the second directional valve 72 are respectively communicated with the inlet of the oil tank 1. The working end of the first directional valve 71 is communicated with the oil port of the lower ring beam pin cylinder 9. The working end of the second directional valve 72 is communicated with the oil port of the upper ring beam pin cylinder 8.

[0038] The lifting cylinder control valve group 10 includes a two-way pressure compensator 101, a proportional reversing valve 102, and a second shuttle valve 103. The oil inlet end of the two-way pressure compensator 101 is communicated with the oil outlet end of the series variable pump 2. The oil outlet end of the two-way pressure compensator 101 is communicated with the oil inlet end of the proportional reversing valve 102. The control end of the two-way pressure compensator 101 is communicated with the oil outlet end of the second shuttle valve 103. The oil outlet end of the proportional reversing valve 102 is communicated with the oil inlet of the fuel tank 1. The working ends of the proportional reversing valve 102 are respectively communicated with the control port of the second shuttle valve 103 and the oil port of the lifting cylinder 12.

[0039] The hydraulic control system further includes a lifting cylinder balance valve group 11. The lifting cylinder balance valve group 11 includes a two-way balance valve 111 and a fourth overflow valve 112. The working ends of the two-way balance valve 111 are respectively communicated with the working end of the proportional reversing valve 102, the rodless cavity of the lifting cylinder 12, and the rod cavity of the lifting cylinder 12. The oil inlet end of the fourth overflow valve 112 is communicated with the rodless cavity of the lifting cylinder 12. The oil outlet end of the fourth overflow valve 112 is communicated with the oil inlet of the fuel tank 1.

[0040] The hydraulic control system further includes an oil return filter 13. The oil inlet end of the oil return filter 13 is respectively communicated with the oil outlet ends of the reel motor control valve group 4, the pin cylinder control valve group 7, and the lifting cylinder control valve group 10. The oil outlet end of the oil return filter 13 is communicated with the oil inlet of the fuel tank 1.

[0041] A control method for a hydraulic control system of a water intake retracting and deploying device, the control method comprising the following steps:

[0042] When retracting the hose 16, first start the series variable pump 2, then operate the reel motor control valve group 4 to drive the reel motor 6 to rotate so that the vertical reel 14 retracts the hose 16. Then operate the pin cylinder control valve group 7 to drive the upper ring beam pin cylinder 8 to retract so that the upper ring beam pin is pulled out. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to extend so that the upper ring beam platform is raised. After the lifting cylinder 12 extends in place, operate the pin cylinder control valve group 7 to drive the upper ring beam pin cylinder 8 to extend so that the upper ring beam pin is inserted. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to retract. At this time, the lower ring beam pin is loosened. Then operate the pin cylinder control valve group 7 to drive the lower ring beam pin cylinder 9 to retract. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to retract so that the lower ring beam platform is raised. After the lifting cylinder 12 retracts in place, operate the pin cylinder control valve group 7 to drive the lower ring beam pin cylinder 9 to extend so that the lower ring beam pin is inserted. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to extend. At this time, the upper ring beam pin is loosened. Repeat the above steps until the hose 16 retraction is completed. Then stop operating the reel motor control valve group 4 and shut down the series variable pump 2;

[0043] When lowering the hose 16, first start the series variable pump 2, then operate the drum motor control valve group 4 to drive the drum motor 6 to rotate, so as to lower the hose 16 by the vertical drum 14. Then operate the pin cylinder control valve group 7 to drive the lower ring beam pin cylinder 9 to retract, so as to pull out the lower ring beam pin. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to extend, so as to lower the lower ring beam platform. After the lifting cylinder 12 extends in place, operate the pin cylinder control valve group 7 to drive the lower ring beam pin cylinder 9 to extend, so as to insert the lower ring beam pin. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to extend. At this time, the upper ring beam pin is loosened. Then operate the pin cylinder control valve group 7 to drive the upper ring beam pin cylinder 8 to retract, so as to pull out the upper ring beam pin. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to retract, so as to lower the upper ring beam platform. After the lifting cylinder 12 retracts in place, operate the pin cylinder control valve group 7 to drive the upper ring beam pin cylinder 8 to extend, so as to insert the upper ring beam pin. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to retract. At this time, the lower ring beam pin is loosened. Repeat the above steps until the hose 16 is lowered. Then stop operating the drum motor control valve group 4 and shut down the series variable pump 2.

[0044] The principle of the present invention is described as follows:

[0045] The hydraulic system is connected to the inlet end of the pilot proportional reversing valve through a series variable pump and a three-way pressure compensator to form a flow adaptive system. The pressure output by the series variable pump matches the load of the drum. By controlling the reversal of the spool of the pilot proportional reversing valve, the forward and reverse rotation of the drum motor is controlled, thereby controlling the operation of the drum to wind and unwind the hose. When the drum winds the hose, the a1 port of the pilot proportional reversing valve discharges oil. The oil passes through the balance valve and reaches the a2 of the drum motor. Then the oil returns through b1. When the drum lowers the hose, the b1 port of the pilot proportional reversing valve discharges oil. At the same time, the pressure at the control oil port of the balance valve rises to a certain value before the main spool of the balance valve can be opened. The balance valve can counteract the heavy load force on the drum motor. The No. 3 overflow valve is used to control the maximum pressure of the motor a2 to prevent the pressure at the a2 port of the motor from being too high. The three-way pressure compensator can keep the pressure difference between the inlet and outlet ports of the pilot proportional reversing valve constant. When the opening of the spool of the multi-way reversing valve is certain, the flow rate through the multi-way reversing valve (the flow rate into the motor) is a fixed value, so that the rotation speed of the drum motor can be ensured not to be affected by load fluctuations. When on standby, the pilot proportional reversing valve is in the middle position. At this time, the hydraulic system unloads through the three-way pressure compensator, and the oil circulates, filters, and cools without load.

[0046] The latch cylinder control valve group controls the actions of the lower ring beam latch cylinder and the upper ring beam latch cylinder respectively. When the first directional valve moves to the left position, the oil outlet of the directional valve is communicated with the rod chamber of the lower ring beam latch cylinder, and the oil return port of the first directional valve is communicated with the rodless chamber of the lower ring beam latch cylinder, and the lower ring beam latch cylinder retracts; when the first directional valve moves to the right position, the oil outlet of the first directional valve is communicated with the rodless chamber of the lower ring beam latch cylinder, and the oil return port of the first directional valve is communicated with the rod chamber of the lower ring beam latch cylinder, and the lower ring beam latch cylinder extends; when the second directional valve moves to the left position, the oil outlet of the second directional valve is communicated with the rod chamber of the lower ring beam latch cylinder, and the oil return port of the second directional valve is communicated with the rodless chamber of the lower ring beam latch cylinder, and the lower ring beam latch cylinder retracts; when the second directional valve moves to the right position, the oil outlet of the second directional valve is communicated with the rodless chamber of the lower ring beam latch cylinder, and the oil return port of the second directional valve is communicated with the rod chamber of the lower ring beam latch cylinder, and the lower ring beam latch cylinder extends.

[0047] The actions of the lifting cylinder are realized through a two-way pressure compensator, a proportional directional valve, and a second shuttle valve. The pressure oil output by the series variable pump enters the oil inlet of the proportional directional valve after passing through the two-way pressure compensator, and the extension and retraction actions of the lifting cylinder are controlled by the commutation of the spool of the proportional directional valve. The detailed actions are as follows: when the lifting cylinder extends, the spool of the proportional directional valve works in the left position, and the oil outlet of the proportional directional valve reaches the rodless chamber of the lifting cylinder through the two-way balance valve. At the same time, when the pressure of the control oil port of the two-way balance valve rises to a certain value, the main spool of the two-way balance valve is opened, and the self-weight load force of the lower ring beam platform can be counteracted through the two-way balance valve; when the lifting cylinder retracts, the spool of the proportional directional valve works in the right position, and the oil outlet of the proportional directional valve reaches the rod chamber of the lifting cylinder through the two-way balance valve. At the same time, when the pressure of the control oil port of the two-way balance valve rises to a certain value, the main spool of the two-way balance valve is opened, and the self-weight of the upper ring beam platform and the hose load force can be counteracted through the two-way balance valve. The fourth relief valve prevents the pressure in the rodless chamber of the cylinder from being too high. The two-way differential pressure compensator can keep the differential pressure of the spool of the proportional directional valve constant. When the opening of the spool of the multi-way directional valve is certain, the flow rate through the proportional directional valve (the flow rate entering the cylinder) is a fixed value, so that the speed of the cylinder can be ensured not to be affected by the load fluctuation. When different proportional signals are given to the proportional directional valve, the spool has different opening degrees, and thus the cylinder speed can be controlled to keep the cylinders moving synchronously.

[0048] Embodiment 1:

[0049] See Figure 1 、 Figure 9 、 Figure 10, a hydraulic control system for a water intake and retraction device. The hydraulic control system includes an oil tank 1, a series variable pump 2, a drum motor control valve group 4, a pin cylinder control valve group 7, and a lifting cylinder control valve group 10. The oil outlet of the oil tank 1 is communicated with the inlet end of the series variable pump 2. The outlet end of the series variable pump 2 is respectively communicated with the inlet ends of the drum motor control valve group 4, the pin cylinder control valve group 7, and the lifting cylinder control valve group 10. The outlet end of the drum motor control valve group 4 is communicated with the inlet port of the drum motor 6. The outlet end of the pin cylinder control valve group 7 is respectively communicated with the oil ports of the upper ring beam pin cylinder 8 and the lower ring beam pin cylinder 9. The outlet end of the lifting cylinder control valve group 10 is communicated with the oil port of the lifting cylinder 12.

[0050] According to the above solution, a control method for a hydraulic control system of a water intake and retraction device. The control method includes the following steps:

[0051] When retracting the hose 16, first start the series variable pump 2, then operate the drum motor control valve group 4 to drive the drum motor 6 to rotate, so that the vertical drum 14 retracts the hose 16. Then operate the pin cylinder control valve group 7 to drive the upper ring beam pin cylinder 8 to retract, so that the upper ring beam pin is pulled out. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to extend, so that the upper ring beam platform rises. After the lifting cylinder 12 extends in place, operate the pin cylinder control valve group 7 to drive the upper ring beam pin cylinder 8 to extend, so that the upper ring beam pin is inserted. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to retract. At this time, the lower ring beam pin is loosened. Then operate the pin cylinder control valve group 7 to drive the lower ring beam pin cylinder 9 to retract. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to retract, so that the lower ring beam platform rises. After the lifting cylinder 12 retracts in place, operate the pin cylinder control valve group 7 to drive the lower ring beam pin cylinder 9 to extend, so that the lower ring beam pin is inserted. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to extend. At this time, the upper ring beam pin is loosened. Repeat the above steps until the hose 16 retraction is completed. Then stop operating the drum motor control valve group 4 and shut down the series variable pump 2;

[0052] When lowering the hose 16, first start the series variable pump 2, then operate the drum motor control valve group 4 to drive the drum motor 6 to rotate, so as to lower the hose 16 by the vertical drum 14. Then operate the pin cylinder control valve group 7 to drive the lower ring beam pin cylinder 9 to retract, so as to pull out the lower ring beam pin. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to extend, so as to lower the lower ring beam platform. After the lifting cylinder 12 extends in place, operate the pin cylinder control valve group 7 to drive the lower ring beam pin cylinder 9 to extend, so as to insert the lower ring beam pin. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to extend. At this time, the upper ring beam pin is loosened. Then operate the pin cylinder control valve group 7 to drive the upper ring beam pin cylinder 8 to retract, so as to pull out the upper ring beam pin. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to retract, so as to lower the upper ring beam platform. After the lifting cylinder 12 retracts in place, operate the pin cylinder control valve group 7 to drive the upper ring beam pin cylinder 8 to extend, so as to insert the upper ring beam pin. Then operate the lifting cylinder control valve group 10 to drive the lifting cylinder 12 to retract. At this time, the lower ring beam pin is loosened. Repeat the above steps until the hose 16 is lowered completely, and then stop operating the drum motor control valve group 4 and shut down the series variable pump 2.

[0053] Embodiment 2:

[0054] The basic content is the same as that of Embodiment 1, the difference is:

[0055] See Figure 2 , the series variable pump 2 includes a first variable pump 21 and a second variable pump 22. The inlet end of the first variable pump 21 is communicated with the outlet of the fuel tank 1, and the outlet end of the first variable pump 21 is communicated with the drum motor control valve group 4. The inlet end of the second variable pump 22 is communicated with the outlet of the fuel tank 1, and the outlet end of the second variable pump 22 is respectively communicated with the inlet ends of the pin cylinder control valve group 7 and the lifting cylinder control valve group 10.

[0056] Embodiment 3:

[0057] The basic content is the same as that of Embodiment 1, the difference is:

[0058] See Figure 3 , the hydraulic control system further includes a load relief valve group 3. The load relief valve group 3 includes a first relief valve 31, a second relief valve 32, a first check valve 33 and a second check valve 34. The inlet ends of the first relief valve 31, the second relief valve 32, the first check valve 33 and the second check valve 34 are respectively communicated with the outlet end of the series variable pump 2. The outlet ends of the first relief valve 31 and the second relief valve 32 are respectively communicated with the inlet of the fuel tank 1. The outlet end of the first check valve 33 is communicated with the inlet end of the drum motor control valve group 4. The outlet end of the second check valve 34 is respectively communicated with the inlet ends of the pin cylinder control valve group 7 and the lifting cylinder control valve group 10.

[0059] Example 4:

[0060] The basic content is the same as that of Example 1, except that:

[0061] Refer to Figure 4 、 Figure 5 . The drum motor control valve group 4 includes a three-way pressure compensator 41, a pilot proportional direction valve 42 and a first shuttle valve 43. The inlet ends of the three-way pressure compensator 41 and the pilot proportional direction valve 42 are respectively communicated with the outlet end of the series variable pump 2. The outlet ends of the three-way pressure compensator 41 and the pilot proportional direction valve 42 are respectively communicated with the inlet port of the fuel tank 1. The working ports a1 and b1 of the pilot proportional direction valve 42 are respectively communicated with the control ports of the first shuttle valve 43. The outlet end of the first shuttle valve 43 is communicated with the control end of the three-way pressure compensator 41. The working ports a1 and b1 of the pilot proportional direction valve 42 are communicated with the inlet port of the drum motor 6. The hydraulic control system further includes a drum motor balance valve group 5. The drum motor balance valve group 5 includes a balance valve 51 and a third overflow valve 52. The working end of the balance valve 51 is respectively communicated with the working port a1 of the pilot proportional direction valve 42, the inlet end of the third overflow valve 52 and the inlet port of the drum motor 6. The control end of the balance valve 51 is communicated with the working port b1 of the pilot proportional direction valve 42. The outlet end of the third overflow valve 52 is communicated with the working port b1 of the pilot proportional direction valve 42.

[0062] Example 5:

[0063] The basic content is the same as that of Example 1, except that:

[0064] Refer to Figure 6 . The pin cylinder control valve group 7 includes a first direction valve 71 and a second direction valve 72. The inlet ends of the first direction valve 71 and the second direction valve 72 are respectively communicated with the outlet end of the series variable pump 2. The outlet ends of the first direction valve 71 and the second direction valve 72 are respectively communicated with the inlet port of the fuel tank 1. The working end of the first direction valve 71 is respectively communicated with the oil ports of the four lower ring beam pin cylinders 9. The working end of the second direction valve 72 is respectively communicated with the oil ports of the four upper ring beam pin cylinders 8.

[0065] Example 6:

[0066] The basic content is the same as that of Example 1, except that:

[0067] Refer to Figure 7 、 Figure 8, the lifting oil cylinder control valve group 10 has four series, including a two-way pressure compensator 101, a proportional directional valve 102, and a second shuttle valve 103. The oil inlet end of the two-way pressure compensator 101 is communicated with the oil outlet end of the series variable pump 2, the oil outlet end of the two-way pressure compensator 101 is communicated with the oil inlet end of the proportional directional valve 102, the control end of the two-way pressure compensator 101 is communicated with the oil outlet end of the second shuttle valve 103, the oil outlet end of the proportional directional valve 102 is communicated with the oil inlet of the fuel tank 1, and the working ends of the proportional directional valve 102 are respectively communicated with the control port of the second shuttle valve 103 and the oil port of the lifting oil cylinder 12; the hydraulic control system further includes a four-series lifting oil cylinder balance valve group 11, and the lifting oil cylinder balance valve group 11 includes a two-way balance valve 111 and a fourth overflow valve 112. The working ends of the two-way balance valve 111 are respectively communicated with the working end of the proportional directional valve 102, the rodless cavity of the lifting oil cylinder 12, and the rod cavity of the lifting oil cylinder 12. The oil inlet end of the fourth overflow valve 112 is communicated with the rodless cavity of the lifting oil cylinder 12, and the oil outlet end of the fourth overflow valve 112 is communicated with the oil inlet of the fuel tank 1.

[0068] Example 7:

[0069] The basic content is the same as that of Example 1, except that:

[0070] See Figure 1 , the hydraulic control system further includes an oil return filter 13. The oil inlet end of the oil return filter 13 is respectively communicated with the oil outlet ends of the drum motor control valve group 4, the pin cylinder control valve group 7, and the lifting oil cylinder control valve group 10, and the oil outlet end of the oil return filter 13 is communicated with the oil inlet of the fuel tank 1.

Claims

1. A hydraulic control system for a water intake and retraction device, characterized in that, The hydraulic control system includes an oil tank (1), a series variable pump (2), a winch motor control valve group (4), a pin cylinder control valve group (7), and a lifting cylinder control valve group (10). The oil outlet of the oil tank (1) is communicated with the inlet end of the series variable pump (2). The outlet end of the series variable pump (2) is respectively communicated with the inlet ends of the winch motor control valve group (4), the pin cylinder control valve group (7), and the lifting cylinder control valve group (10). The outlet end of the winch motor control valve group (4) is communicated with the inlet port of the winch motor (6). The outlet ends of the pin cylinder control valve group (7) are respectively communicated with the oil ports of the upper ring beam pin cylinder (8) and the lower ring beam pin cylinder (9). The outlet end of the lifting cylinder control valve group (10) is communicated with the oil port of the lifting cylinder (12). The series variable pump (2) includes a first variable pump (21) and a second variable pump (22). The inlet end of the first variable pump (21) is communicated with the oil outlet of the oil tank (1). The outlet end of the first variable pump (21) is communicated with the winch motor control valve group (4). The inlet end of the second variable pump (22) is communicated with the oil outlet of the oil tank (1). The outlet end of the second variable pump (22) is respectively communicated with the inlet ends of the pin cylinder control valve group (7) and the lifting cylinder control valve group (10). The hydraulic control system further includes a load relief valve group (3). The load relief valve group (3) includes a first relief valve (31), a second relief valve (32), a first check valve (33), and a second check valve (34). The inlet ends of the first relief valve (31), the second relief valve (32), the first check valve (33), and the second check valve (34) are respectively communicated with the outlet end of the series variable pump (2). The outlet ends of the first relief valve (31) and the second relief valve (32) are respectively communicated with the inlet port of the oil tank (1). The outlet end of the first check valve (33) is communicated with the inlet end of the winch motor control valve group (4). The outlet end of the second check valve (34) is respectively communicated with the inlet ends of the pin cylinder control valve group (7) and the lifting cylinder control valve group (10). The winch motor control valve group (4) includes a three-way pressure compensator (41), a pilot proportional directional valve (42), and a first shuttle valve (43). The inlet ends of the three-way pressure compensator (41) and the pilot proportional directional valve (42) are respectively communicated with the outlet end of the series variable pump (2). The outlet ends of the three-way pressure compensator (41) and the pilot proportional directional valve (42) are respectively communicated with the inlet port of the oil tank (1). The working ports a1 and b1 of the pilot proportional directional valve (42) are respectively communicated with the control ports of the first shuttle valve (43). The outlet end of the first shuttle valve (43) is communicated with the control end of the three-way pressure compensator (41). The working ports a1 and b1 of the pilot proportional directional valve (42) are communicated with the inlet port of the winch motor (6).

2. The hydraulic control system of a water intake and retraction device according to claim 1, characterized in that: The hydraulic control system further includes a winch motor balance valve group (5). The winch motor balance valve group (5) includes a balance valve (51) and a third overflow valve (52). The working end of the balance valve (51) is respectively communicated with the working oil port a1 of the pilot proportional directional valve (42), the inlet end of the third overflow valve (52), and the inlet port of the winch motor (6). The control end of the balance valve (51) is communicated with the working oil port b1 of the pilot proportional directional valve (42). The outlet end of the third overflow valve (52) is communicated with the working oil port b1 of the pilot proportional directional valve (42).

3. The hydraulic control system of a water intake and retraction device according to claim 1, characterized in that: The pin cylinder control valve group (7) includes a first directional valve (71) and a second directional valve (72). The inlet ends of the first directional valve (71) and the second directional valve (72) are respectively communicated with the outlet end of the series variable pump (2). The outlet ends of the first directional valve (71) and the second directional valve (72) are respectively communicated with the inlet port of the fuel tank (1). The working end of the first directional valve (71) is communicated with the oil port of the lower ring beam pin cylinder (9). The working end of the second directional valve (72) is communicated with the oil port of the upper ring beam pin cylinder (8).

4. The hydraulic control system of a water intake and retraction device according to claim 1, characterized in that: The lifting cylinder control valve group (10) includes a two-way pressure compensator (101), a proportional directional valve (102), and a second shuttle valve (103). The inlet end of the two-way pressure compensator (101) is communicated with the outlet end of the series variable pump (2). The outlet end of the two-way pressure compensator (101) is communicated with the inlet end of the proportional directional valve (102). The control end of the two-way pressure compensator (101) is communicated with the outlet end of the second shuttle valve (103). The outlet end of the proportional directional valve (102) is communicated with the inlet port of the fuel tank (1). The working end of the proportional directional valve (102) is respectively communicated with the control port of the second shuttle valve (103) and the oil port of the lifting cylinder (12).

5. The hydraulic control system of a water intake and retraction device according to claim 4, characterized in that: The hydraulic control system further includes a lifting cylinder balance valve group (11). The lifting cylinder balance valve group (11) includes a two-way balance valve (111) and a fourth overflow valve (112). The working end of the two-way balance valve (111) is respectively communicated with the working end of the proportional directional valve (102), the rodless cavity of the lifting cylinder (12), and the rod cavity of the lifting cylinder (12). The inlet end of the fourth overflow valve (112) is communicated with the rodless cavity of the lifting cylinder (12). The outlet end of the fourth overflow valve (112) is communicated with the inlet port of the fuel tank (1).

6. The hydraulic control system of a water intake and retraction device according to claim 1, characterized in that: The hydraulic control system further includes an oil return filter (13). The inlet end of the oil return filter (13) is respectively communicated with the outlet ends of the winch motor control valve group (4), the pin cylinder control valve group (7), and the lifting cylinder control valve group (10). The outlet end of the oil return filter (13) is communicated with the inlet port of the fuel tank (1).

7. A control method for a hydraulic control system of the water intake and release device according to claim 1, characterized in that: The control method includes the following steps: When retracting the hose (16), first start the series variable pump (2), then operate the drum motor control valve group (4) to drive the drum motor (6) to rotate, so that the vertical drum (14) retracts the hose (16). Then operate the pin cylinder control valve group (7) to drive the upper ring beam pin cylinder (8) to retract, so that the upper ring beam pin is pulled out. Then operate the lifting cylinder control valve group (10) to drive the lifting cylinder (12) to extend, so that the upper ring beam platform rises. After the lifting cylinder (12) extends in place, operate the pin cylinder control valve group (7) to drive the upper ring beam pin cylinder (8) to extend, so that the upper ring beam pin is inserted. Then operate the lifting cylinder control valve group (10) to drive the lifting cylinder (12) to retract. At this time, the lower ring beam pin is released. Then operate the pin cylinder control valve group (7) to drive the lower ring beam pin cylinder (9) to retract. Then operate the lifting cylinder control valve group (10) to drive the lifting cylinder (12) to retract, so that the lower ring beam platform rises. After the lifting cylinder (12) retracts in place, operate the pin cylinder control valve group (7) to drive the lower ring beam pin cylinder (9) to extend, so that the lower ring beam pin is inserted. Then operate the lifting cylinder control valve group (10) to drive the lifting cylinder (12) to extend. At this time, the upper ring beam pin is released. Repeat the above steps until the hose (16) retraction is completed. Then stop operating the drum motor control valve group (4) and shut down the series variable pump (2). When lowering the hose (16), first start the series variable pump (2), then operate the drum motor control valve group (4) to drive the drum motor (6) to rotate, so that the vertical drum (14) lowers the hose (16). Then operate the pin cylinder control valve group (7) to drive the lower ring beam pin cylinder (9) to retract, so that the lower ring beam pin is pulled out. Then operate the lifting cylinder control valve group (10) to drive the lifting cylinder (12) to extend, so that the lower ring beam platform descends. After the lifting cylinder (12) extends in place, operate the pin cylinder control valve group (7) to drive the lower ring beam pin cylinder (9) to extend, so that the lower ring beam pin is inserted. Then operate the lifting cylinder control valve group (10) to drive the lifting cylinder (12) to extend. At this time, the upper ring beam pin is released. Then operate the pin cylinder control valve group (7) to drive the upper ring beam pin cylinder (8) to retract, so that the upper ring beam pin is pulled out. Then operate the lifting cylinder control valve group (10) to drive the lifting cylinder (12) to retract, so that the upper ring beam platform descends. After the lifting cylinder (12) retracts in place, operate the pin cylinder control valve group (7) to drive the upper ring beam pin cylinder (8) to extend, so that the upper ring beam pin is inserted. Then operate the lifting cylinder control valve group (10) to drive the lifting cylinder (12) to retract. At this time, the lower ring beam pin is released. Repeat the above steps until the hose (16) lowering is completed. Then stop operating the drum motor control valve group (4) and shut down the series variable pump (2).

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