Winch storage hydraulic system

Abstract

The winch storage hydraulic system comprises a pilot overflow valve, a motor and an oil tank, the oil tank is provided with a first oil port and a second oil port, the first oil port is connected with the oil inlet end of the motor through a first oil outlet pipeline, and the oil outlet end of the motor is connected with the second oil port of the oil tank through a first oil return pipeline; a pilot-operated overflow valve is arranged between the first oil outlet pipeline and the first oil return pipeline, the oil inlet end of the pilot-operated overflow valve is connected with the first oil outlet pipeline, the oil outlet end of the pilot-operated overflow valve is connected with the first oil return pipeline, and a pilot-operated oil way of the pilot-operated overflow valve is connected with an oil tank through a first switch valve. The first switch valve is in a closed state when not reversing, the pilot oil way of the pilot overflow valve is further connected with a first oil outlet pipeline, and hydraulic oil of the first oil outlet pipeline flows into the pilot oil way of the pilot overflow valve to drive an internal oil way of the pilot overflow valve to be closed. By means of the structure, the motor can be controlled to rotate stably when the winch winds the cable, and the cable is kept in a constant-tension state.

Description

Technical Field

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

[0002] A winch is a small and light lifting device that lifts or pulls heavy objects by winding a wire rope or chain around a drum. Due to its simple operation and strong load capacity, winches are widely used in marine engineering, ships, coal mines, docks, mines, roads and bridges, etc. In the marine environment, the hydraulic motor is usually driven by a hydraulic control system to control the rotation of the hydraulic motor, thereby completing the rope collection and release operations and other winch-related operations.

[0003] The patent application number in China is 202310244642.5 and the publication date is 2023.07.04 The patent document discloses a winch hydraulic control system, including a hydraulic oil tank, a hydraulic pump, and an electric motor. The oil inlet of the hydraulic pump is connected to the hydraulic oil tank, the electric motor is connected to the hydraulic pump, the oil outlet of the hydraulic pump is connected to the P port of the main reversing valve group and the P port of the control valve group, the A port and the B port of the main reversing valve group are respectively connected to the A port of the first shuttle valve, the A port of the balance valve group and the B port of the control valve group, the X port is connected to the B port of the second electromagnetic reversing valve, the B port and the C port of the first shuttle valve are respectively connected to the B port of the balance valve group and the B port of the second shuttle valve, the third pressure reducing valve is connected in parallel to the second electromagnetic valve, the P port of the second electromagnetic reversing valve is connected to the X port of the control valve group, the A port of the second shuttle valve, and the SP port of the balance valve group, the C port of the second shuttle valve is connected to the rod chamber of the brake, the brake is connected to the hydraulic motor, and the oil outlet of the control valve group is connected to the oil inlet of the balance valve group. This design can maintain constant tension of the wire rope and stable operation.

[0004] As in the prior art of the document, if the winch motor rotates too fast when the winch is storing the cable, the cable may be tightened, which may increase the tension of the cable and cause it to break, ultimately causing damage to the cargo and personnel. Summary of the invention

[0005] The present invention provides a winch storage hydraulic system, which enables the motor to be controlled to rotate stably when the winch is collecting the rope, so that the rope is kept in a constant tension state, and the flow of the oil circuit can be controlled.

[0006] To achieve the above-mentioned purpose, the technical solution of the present invention is: a winch storage hydraulic system, including a pilot relief valve, a motor and an oil tank, the oil tank is provided with a first oil port and a second oil port, the first oil port is connected to the oil inlet end of the motor through a first oil outlet pipe, the oil outlet end of the motor is connected to the second oil port of the oil tank through a first return oil pipe, a pilot relief valve is provided between the first oil outlet pipe and the first return oil pipe, the oil inlet end of the pilot relief valve is connected to the first oil outlet pipe, the oil outlet end of the pilot relief valve is connected to the first return oil pipe, the pilot oil circuit of the pilot relief valve is connected to the oil tank through a first switch valve, the first switch valve is in a closed state when not reversing, the pilot oil circuit of the pilot relief valve is also connected to the first oil outlet pipe, the hydraulic oil in the first oil outlet pipe flows into the pilot oil circuit of the pilot relief valve to drive the internal oil circuit of the pilot relief valve to close.

[0007] The first oil outlet pipeline is provided with a first balancing valve group and a second balancing valve group, the first balancing valve group includes a first relief valve and a first check valve, the oil inlet end of the first relief valve is connected to the oil inlet end of the motor through the first oil outlet pipeline, the oil outlet end of the first relief valve is connected to the first oil port of the oil tank through the first oil outlet pipeline, the oil inlet end of the first check valve is connected to the oil outlet end of the first relief valve, and the oil outlet end of the first check valve is connected to the oil inlet end of the first relief valve. By providing the first balancing valve group, the flow rate of the hydraulic oil circulating on the first oil outlet pipeline is stabilized.

[0008] The second balancing valve group includes a second overflow valve and a second non-return valve, the oil inlet end of the second overflow valve is connected to the oil inlet end of the motor through the first oil outlet pipeline, the oil outlet end of the second overflow valve is connected to the first oil port of the oil tank through the first oil outlet pipeline, the oil inlet end of the second non-return valve is connected to the oil outlet end of the second overflow valve, and the oil outlet end of the second non-return valve is connected to the oil inlet end of the second overflow valve. By setting the second balancing valve group, the flow rate of the hydraulic oil on the first oil outlet pipeline is stabilized.

[0009] The control ends of the first overflow valve and the second overflow valve are connected to the oil tank through a balancing reversing valve, the P end of the balancing reversing valve is connected to the oil tank, the T end of the balancing reversing valve is connected to the oil tank, the A end of the balancing reversing valve is connected to the control end of the first overflow valve, the B end of the balancing reversing valve is connected to the control end of the second overflow valve, and the flow of the first overflow valve is greater than the flow of the second overflow valve.

[0010] The above arrangement, by providing two overflow valves with different flow rates, enables different balancing valves to be switched according to actual needs, thereby controlling the hydraulic oil flow rate of the first oil outlet pipeline.

[0011] In the above structure, by setting a pilot relief valve, when the winch needs to retract the cable, the oil tank transports hydraulic oil to one end of the motor through the first oil outlet pipeline to drive the motor to rotate, thereby realizing rope retraction. During the rope retraction process, if the motor rotates too fast, the hydraulic oil pressure transported by the oil tank increases. Since the first oil outlet pipeline is connected to the pilot oil circuit of the pilot relief valve, a control oil pressure is formed by the hydraulic oil flowing into the pilot oil circuit of the pilot relief valve. At this time, the control oil pressure is greater than the hydraulic oil pressure of the first oil outlet pipeline, and the pilot relief valve cannot be opened. When the first switch valve is turned on , a part of the hydraulic oil in the pilot oil circuit of the pilot relief valve is unloaded through the first switch valve and flows back to the oil tank, thereby reducing the control oil pressure. When the hydraulic oil pressure in the first oil outlet pipeline is greater than the control oil pressure of the pilot oil circuit of the pilot relief valve, the pilot relief valve can be opened, so that the hydraulic oil in the first oil outlet pipeline can flow to the first return oil pipeline through the pilot relief valve, and then the hydraulic oil flows back to the oil tank through the first return oil pipeline, thereby preventing the hydraulic oil pressure in the first oil outlet pipeline from being too high, thereby ensuring stable rotation of the motor and maintaining a constant tension state for the cable, thereby preventing the cable from being tightened and broken.

[0012] Furthermore, an oil pressure regulating valve group is provided between the first switch valve and the oil tank, and the oil pressure regulating valve group includes a regulating reversing valve, a first pressure valve and a second pressure valve. The P end of the regulating reversing valve is connected to the first switch valve, the T end of the regulating reversing valve is connected to the oil tank, the A end of the regulating reversing valve is connected to the oil tank through the first pressure valve, and the B end of the regulating reversing valve is connected to the oil tank through the second pressure valve. The regulating pressure of the first pressure valve is greater than the regulating pressure of the second pressure valve.

[0013] The above arrangement, by setting an oil pressure regulating valve group, and the regulating pressures of the first pressure valve and the second pressure valve are different, the regulating reversing valve can be switched according to actual needs, so that the control oil pressure required by the pilot relief valve can be adjusted, which is convenient for controlling the oil pressure of the hydraulic oil in the first oil outlet pipeline. When the pressure of the control oil pressure needs to be increased, the regulating reversing valve is controlled to be reversed so that the P end of the regulating reversing valve is connected to the A end, and the hydraulic oil in the pilot oil circuit of the pilot relief valve flows back to the oil tank through the first pressure valve, thereby ensuring that the control oil pressure of the pilot relief valve can be adjusted to the pressure set by the first pressure valve. If the pressure of the control oil pressure needs to be reduced, the P end of the regulating reversing valve is controlled to be connected to the B end.

[0014] Furthermore, a second switch valve is provided between the first oil outlet pipeline and the oil inlet end of the pilot-operated relief valve, and two ends of the second switch valve are respectively connected to the first oil outlet pipeline and the pilot-operated relief valve.

[0015] The above arrangement, by providing the second switch valve, allows the pilot-operated relief valve to be closed when it is not needed to drain oil, thereby preventing the hydraulic oil from being unloaded.

[0016] Furthermore, it also includes a brake valve group, which includes a brake reversing valve and a brake valve, and the brake valve is arranged on the motor, the P end of the brake reversing valve is connected to the oil tank, the T end of the brake reversing valve is connected to the oil tank, the A end of the brake reversing valve is connected to the control end of the brake valve, and the control end of the brake reversing valve is connected to the first oil outlet pipeline and the first oil return pipeline.

[0017] The above setting, by setting the brake valve, when the motor is to be driven, the hydraulic oil flows to the control end of the brake reversing valve through the first oil outlet pipe and the first oil return pipe, thereby driving the brake reversing valve to reverse and making the P end of the brake reversing valve connected to the A end, thereby making the oil tank output hydraulic oil to the control end of the brake valve and open the brake valve to ensure that the motor can rotate.

[0018] Furthermore, a brake shuttle valve is provided between the first oil outlet pipeline and the first oil return pipeline, the first port of the brake shuttle valve is connected to the first oil outlet pipeline, the second port of the brake shuttle valve is connected to the first oil return pipeline, and the third port of the brake shuttle valve is connected to the control end of the brake reversing valve.

[0019] The above arrangement, by providing the brake shuttle valve, ensures that the hydraulic oil flowing from the first oil outlet pipeline and the first oil return pipeline to the control end of the brake reversing valve will not conflict with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the hydraulic system of the present invention.

[0021] Figure 2 for Figure 1 Enlarged view of point D in the middle. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 1-Figure 2As shown, a winch storage hydraulic system includes a pilot relief valve 1, a motor 2 and an oil tank 3, wherein the oil tank 3 is provided with a first oil port 31 and a second oil port 32, wherein the first oil port 31 is connected to an oil inlet end 21 of the motor 2 via a first oil outlet pipeline 33, and the oil outlet end 22 of the motor 2 is connected to the second oil port 32 of the oil tank 3 via a first oil return pipeline 34, wherein a pilot relief valve 1 is provided between the first oil outlet pipeline 33 and the first oil return pipeline 34, and the oil inlet end 21 of the pilot relief valve 1 is connected to the second oil inlet end 22 of the oil tank 3 via a first oil return pipeline 34. The first oil outlet pipeline 33 is connected, and the oil outlet end of the pilot relief valve 1 is connected to the first oil return pipeline 34. The pilot oil circuit 11 of the pilot relief valve 1 is connected to the oil tank 2 through the first switch valve 12. The first switch valve 12 is in a closed state when it is not reversed. The pilot oil circuit 11 of the pilot relief valve 1 is also connected to the first oil outlet pipeline 33. The hydraulic oil in the first oil outlet pipeline 33 flows into the pilot oil circuit 11 of the pilot relief valve 1 to drive the internal oil circuit of the pilot relief valve 1 to close.

[0024] An oil pressure regulating valve group 4 is provided between the first switch valve 12 and the oil tank 3, and the oil pressure regulating valve group 4 includes a regulating reversing valve 41, a first pressure valve 42 and a second pressure valve 43. The P end of the regulating reversing valve 41 is connected to the first switch valve 12, the T end of the regulating reversing valve 41 is connected to the oil tank 3, the A end of the regulating reversing valve 41 is connected to the oil tank 3 through the first pressure valve 42, and the B end of the regulating reversing valve 41 is connected to the oil tank 3 through the second pressure valve 42. The regulating pressure of the first pressure valve 42 is greater than the regulating pressure of the second pressure valve 43. By setting up the oil pressure regulating valve group 4, and the regulating pressures of the first pressure valve 42 and the second pressure valve 43 are different, the regulating reversing valve 41 can be switched according to actual needs, so that the control oil pressure required by the pilot relief valve 1 can be adjusted, which is convenient for controlling the oil pressure of the hydraulic oil in the first oil outlet pipeline 33. When the pressure of the control oil pressure needs to be increased, the regulating reversing valve 41 is controlled to be reversed so that the P end of the regulating reversing valve 41 is connected to the A end, and the hydraulic oil in the pilot oil circuit 11 of the pilot relief valve 1 flows back to the oil tank through the P end and the A end of the regulating reversing valve 41 through the first pressure valve 42, thereby ensuring that the control oil pressure of the pilot relief valve 1 can be adjusted to the pressure set by the first pressure valve 42. If the pressure of the control oil pressure needs to be reduced, the P end of the regulating reversing valve 41 is controlled to be connected to the B end. In this embodiment, a spring 10 is further provided on the pilot oil circuit 11 of the pilot relief valve 1, and the internal oil circuit of the pilot relief valve 1 is closed by the control oil pressure of the spring 10 and the pilot oil circuit 11. like Figure 1 and Figure 2As shown, a first balancing valve group 5 is provided on the first oil outlet pipeline 33, and the first balancing valve group 5 includes a first overflow valve 51 and a first check valve 52. The oil inlet end of the first overflow valve 51 is connected to the oil inlet end 21 of the motor 2 through the first oil outlet pipeline 33, and the oil outlet end of the first overflow valve 51 is connected to the first oil port 31 of the oil tank 3 through the first oil outlet pipeline 33. The oil inlet end of the first check valve 52 is connected to the oil outlet end of the first overflow valve 51, and the oil outlet end of the first check valve 52 is connected to the oil inlet end of the first overflow valve 51. By providing the first balancing valve group 5, the flow rate of the hydraulic oil circulating on the first oil outlet pipeline 33 is stabilized.

[0025] A second balancing valve group 6 is also provided on the first oil outlet pipeline 33. The second balancing valve group 6 includes a second overflow valve 61 and a second check valve 62. The oil inlet end of the second overflow valve 61 is connected to the oil inlet end 21 of the motor 2 through the first oil outlet pipeline 33, the oil outlet end of the second overflow valve 61 is connected to the first oil port 31 of the oil tank 3 through the first oil outlet pipeline 33, the oil inlet end of the second check valve 62 is connected to the oil outlet end of the second overflow valve 61, and the oil outlet end of the second check valve 62 is connected to the oil inlet end of the second overflow valve 61. By providing the second balancing valve group 6, the flow rate of the hydraulic oil circulating on the first oil outlet pipeline 33 is stabilized.

[0026] like Figure 2 As shown, the control ends of the first relief valve 51 and the second relief valve 61 are connected to the oil tank 3 through the balanced reversing valve 7, the P end of the balanced reversing valve 7 is connected to the oil tank, the T end of the balanced reversing valve 7 is connected to the oil tank, the A end of the balanced reversing valve 7 is connected to the control end 53 of the first relief valve 51, and the B end of the balanced reversing valve 7 is connected to the control end 63 of the second relief valve 61, and the flow of the first relief valve 51 is greater than the flow of the second relief valve 61. By setting two relief valves with different flow rates, different balancing valves can be switched according to actual needs, thereby controlling the hydraulic oil flow of the first oil outlet pipeline 33.

[0027] like Figure 2 As shown, a second switch valve 13 is provided between the first oil outlet pipeline 33 and the oil inlet end of the pilot relief valve 1, and both ends of the second switch valve 13 are respectively connected to the first oil outlet pipeline 33 and the pilot relief valve 1. By providing the second switch valve 13, when the pilot relief valve 1 is not needed for oil discharge, it is closed to prevent the hydraulic oil from being unloaded.

[0028] like Figure 1 and Figure 2As shown, the brake valve group includes a brake reversing valve 81 and a brake valve 82. The brake valve 82 is arranged on the motor 2. The P end of the brake reversing valve 81 is connected to the oil tank 3, the T end of the brake reversing valve 81 is connected to the oil tank 3, the A end of the brake reversing valve 81 is connected to the control end of the brake valve 82, and the control end 83 of the brake reversing valve 81 is connected to the first oil outlet pipeline 33 and the first oil return pipeline 34. By setting the brake valve 82, when the motor is to be driven, the hydraulic oil flows to the control end of the brake reversing valve 81 through the first oil outlet pipeline 33 and the first oil return pipeline 34, thereby driving the brake reversing valve 81 to reverse and making the P end of the brake reversing valve 81 connected to the A end, so that the oil tank 3 outputs hydraulic oil to the control end of the brake valve 82 and opens the brake valve 82 to ensure that the motor 2 can rotate.

[0029] A brake shuttle valve 84 is provided between the first oil outlet pipeline 33 and the first oil return pipeline 34, wherein a first port 85 of the brake shuttle valve 84 is connected to the first oil outlet pipeline 33, a second port 86 of the brake shuttle valve 84 is connected to the first oil return pipeline 34, and a third port 87 of the brake shuttle valve 84 is connected to the control end of the brake reversing valve 81. By providing the brake shuttle valve 84, the hydraulic oil flowing from the first oil outlet pipeline 33 and the first oil return pipeline 34 to the control end of the brake reversing valve 81 will not conflict with each other.

[0030] The working principle of the present invention is as follows: by setting a pilot relief valve 1, when the winch needs to reel in the cable, the oil tank delivers hydraulic oil to one end of the motor through the first oil outlet pipe 33 and then drives the motor to rotate, thereby realizing rope reeling. During the rope reeling process, if the motor rotates too fast, the hydraulic oil pressure delivered by the oil tank increases. Since the first oil outlet pipe 33 is connected to the pilot oil circuit 11 of the pilot relief valve 1, a control oil pressure is formed by the hydraulic oil flowing into the pilot oil circuit 11 of the pilot relief valve 1. At this time, the control oil pressure is greater than the hydraulic oil pressure of the first oil outlet pipe 33, and the pilot relief valve 1 cannot be opened. When the first switch valve 12 is reversed. , a part of the hydraulic oil in the pilot oil circuit 11 of the pilot relief valve 1 is unloaded through the first switch valve 12 and flows back to the oil tank, thereby reducing the control oil pressure. When the hydraulic oil pressure in the first oil outlet pipeline 33 is greater than the control oil pressure of the pilot oil circuit 11 of the pilot relief valve 1, the pilot relief valve 1 can be opened, so that the hydraulic oil in the first oil outlet pipeline 33 can flow to the first return oil pipeline 34 through the pilot relief valve 1, and then the hydraulic oil flows back to the oil tank through the first return oil pipeline 34, thereby preventing the hydraulic oil pressure in the first oil outlet pipeline 33 from being too high, thereby ensuring stable rotation of the motor and maintaining a constant tension state for the cable to prevent the cable from being tightened and broken.

Claims

1. A winch storage hydraulic system, characterized in that: The invention comprises a pilot-operated relief valve, a motor and an oil tank, wherein the oil tank is provided with a first oil port and a second oil port, the first oil port is connected to the oil inlet end of the motor through a first oil outlet pipeline, the oil outlet end of the motor is connected to the second oil port of the oil tank through a first oil return pipeline, a pilot-operated relief valve is provided between the first oil outlet pipeline and the first oil return pipeline, the oil inlet end of the pilot-operated relief valve is connected to the first oil outlet pipeline, the oil outlet end of the pilot-operated relief valve is connected to the first oil return pipeline, the pilot oil circuit of the pilot-operated relief valve is connected to the oil tank through a first switch valve, the first switch valve is in a closed state when not reversing, and the pilot oil of the pilot-operated relief valve The first oil outlet pipeline is also connected to the first oil outlet pipeline, and the hydraulic oil in the first oil outlet pipeline flows into the pilot oil circuit of the pilot relief valve to drive the internal oil circuit of the pilot relief valve to close; a first balancing valve group and a second balancing valve group are arranged on the first oil outlet pipeline, and the first balancing valve group includes a first relief valve and a first check valve, the oil inlet end of the first relief valve is connected to the oil inlet end of the motor through the first oil outlet pipeline, the oil outlet end of the first relief valve is connected to the first oil port of the oil tank through the first oil outlet pipeline, the oil inlet end of the first check valve is connected to the oil outlet end of the first relief valve, and the oil outlet end of the first check valve is connected to the oil inlet end of the first relief valve; The second balancing valve group includes a second overflow valve and a second check valve, the oil inlet end of the second overflow valve is connected to the oil inlet end of the motor through the first oil outlet pipeline, the oil outlet end of the second overflow valve is connected to the first oil port of the oil tank through the first oil outlet pipeline, the oil inlet end of the second check valve is connected to the oil outlet end of the second overflow valve, and the oil outlet end of the second check valve is connected to the oil inlet end of the second overflow valve; The control ends of the first overflow valve and the second overflow valve are connected to the oil tank through a balancing reversing valve, the P end of the balancing reversing valve is connected to the oil tank, the T end of the balancing reversing valve is connected to the oil tank, the A end of the balancing reversing valve is connected to the control end of the first overflow valve, the B end of the balancing reversing valve is connected to the control end of the second overflow valve, and the flow of the first overflow valve is greater than the flow of the second overflow valve.

2. A winch storage hydraulic system according to claim 1, characterized in that: An oil pressure regulating valve group is provided between the first switch valve and the oil tank, and the oil pressure regulating valve group includes a regulating reversing valve, a first pressure valve and a second pressure valve. The P end of the regulating reversing valve is connected to the first switch valve, the T end of the regulating reversing valve is connected to the oil tank, the A end of the regulating reversing valve is connected to the oil tank through the first pressure valve, and the B end of the regulating reversing valve is connected to the oil tank through the second pressure valve. The regulating pressure of the first pressure valve is greater than the regulating pressure of the second pressure valve.

3. A winch storage hydraulic system according to claim 1, characterized in that: A second switch valve is provided between the first oil outlet pipeline and the oil inlet end of the pilot-operated relief valve, and two ends of the second switch valve are respectively connected to the first oil outlet pipeline and the pilot-operated relief valve.

4. A winch storage hydraulic system according to claim 1, characterized in that: It also includes a brake valve group, which includes a brake reversing valve and a brake valve. The brake valve is arranged on a motor, the P end of the brake reversing valve is connected to the oil tank, the T end of the brake reversing valve is connected to the oil tank, the A end of the brake reversing valve is connected to the control end of the brake valve, and the control end of the brake reversing valve is connected to the first oil outlet pipeline and the first oil return pipeline.

5. A winch storage hydraulic system according to claim 4, characterized in that: A brake shuttle valve is provided between the first oil outlet pipeline and the first oil return pipeline, wherein the first port of the brake shuttle valve is connected to the first oil outlet pipeline, the second port of the brake shuttle valve is connected to the first oil return pipeline, and the third port of the brake shuttle valve is connected to the control end of the brake reversing valve.

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