A rope collection control method

Abstract

The present invention provides a rope-collecting control method, which is implemented by a hydraulic system. The specific steps include: (1) the oil tank outputs hydraulic oil to the motor through a first oil outlet pipeline, driving the motor to rotate to collect the rope; (2) a portion of the hydraulic oil in the first oil outlet pipeline flows into the pilot oil circuit of the pilot overflow valve and drives the pilot overflow valve to close; (3) during the rope-collecting process, if the motor rotates too fast, the oil pressure in the first oil outlet pipeline increases; (4) the first switch valve is controlled to be turned on; (5) a portion of the hydraulic oil in the pilot oil circuit of the pilot overflow valve flows back to the oil tank through the first switch valve, and the control oil pressure of the pilot overflow valve increases or decreases; (6) when the oil pressure in the first oil outlet pipeline is greater than the control oil pressure of the pilot overflow valve, the pilot overflow valve opens; (7) the hydraulic oil in the first oil outlet pipeline flows to the first return oil pipeline through the pilot overflow valve, and flows back to the oil tank through the first return oil pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of winch control systems, and in particular to a rope retraction control method. Background Art

[0002] A winch is a lifting equipment used for lifting or towing materials in marine engineering, construction, water conservancy projects, forestry, mining, docks, etc. Its main application area is on ships, where it is used in combination with supporting equipment.

[0003] If the winch motor rotates too fast when the winch is retracting 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.

[0004] In the patent document with Chinese patent application number 202323007055.9 and announcement date of 2023.11.08, a hydraulic system for winch cable storage is disclosed, including a storage winch motor, an oil tank and a pilot overflow valve, the oil tank is provided with a first opening and a second opening, one end of the storage winch motor is connected to the first opening of the oil tank through a first oil circuit, and the other end of the storage winch motor is connected to the second opening of the oil tank through a second oil circuit, a pilot overflow valve is provided between the first oil circuit and the second oil circuit, the oil inlet end of the pilot overflow valve is connected to the first oil circuit, the oil outlet end of the pilot overflow valve is connected to the second oil circuit, and the control end of the pilot overflow valve is also connected to the first oil circuit; the hydraulic system of the utility model enables the storage winch to control the stable rotation of the winch motor when the rope is being stored, so that the cable maintains a constant tension state.

[0005] However, the hydraulic system of this document needs to be shut down to adjust the pilot relief valve if the oil pressure of the oil circuit needs to be adjusted. In this way, the control oil pressure of the pilot relief valve cannot be adjusted in real time according to needs, which reduces work efficiency. Summary of the Invention

[0006] The present invention provides a rope collection control method, which can maintain a constant tension on the cable and adjust the oil pressure of the oil circuit according to actual needs.

[0007] To achieve the above object, the technical solution of the present invention is: a rope collection control method, which is implemented by a hydraulic system, and the specific steps include:

[0008] (1) The oil tank outputs hydraulic oil to the motor through the first oil outlet pipe, driving the motor to rotate and reel in the rope.

[0009] (2) A portion of the hydraulic oil in the first oil outlet pipe flows into the pilot oil circuit of the pilot-operated relief valve and drives the pilot-operated relief valve to close.

[0010] (3) During the rope reeling process, if the motor rotates too fast, the oil pressure in the first oil outlet pipeline will increase.

[0011] (4) Control the conduction of the first switch valve.

[0012] (5) A portion of the hydraulic oil in the pilot oil circuit of the pilot-operated relief valve flows back to the oil tank through the first switch valve to determine the first pressure valve or the second pressure valve as needed, and the control oil pressure of the pilot-operated relief valve increases or decreases.

[0013] (51) When the pressure of the control oil pressure is to be increased.

[0014] (52) Control the reversing of the regulating reversing valve 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.

[0015] (53) When the control oil pressure is to be reduced.

[0016] (54) Control the regulating reversing valve so that the P end of the regulating reversing valve is connected to the B end, and the hydraulic oil in the pilot oil circuit of the pilot relief valve flows back to the oil tank through the second pressure valve.

[0017] (6) When the oil pressure in the first oil outlet pipeline is greater than the control oil pressure of the pilot relief valve, the pilot relief valve opens.

[0018] (7) The hydraulic oil in the first oil outlet pipe flows to the first oil return pipe through the pilot overflow valve, and then flows back to the oil tank through the first oil return pipe.

[0019] The hydraulic system includes a pilot-operated 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, and the oil outlet end of the motor is connected to the second oil port of the oil tank through a first oil return pipe. A pilot-operated relief valve is provided between the first oil outlet pipe and the first oil return pipe. The oil inlet end of the pilot-operated relief valve is connected to the first oil outlet pipe, and the oil outlet end of the pilot-operated relief valve is connected to the first oil return pipe. The pilot oil circuit of the pilot-operated relief valve is connected to the oil tank through a first switching valve.

[0020] 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.

[0021] The above setting, 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.

[0022] The above structure is provided with a pilot-operated relief valve. When the winch needs to retract the cable, the oil tank delivers hydraulic oil to one end of the motor through the first oil outlet pipe, thereby driving the motor to rotate, thereby achieving rope retraction. During the rope retraction process, if the motor rotates too fast, the hydraulic oil pressure delivered by the oil tank increases. Since the first oil outlet pipe is connected to the pilot oil circuit of the pilot-operated 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 pipe, and the pilot relief valve cannot be opened. When the first switch valve is reversed After derrick hoists and puts in place, stamp fixedly derrick of derrick pin, then, by derrick pin, under the derrick of derrick hoists and puts in place, the oil circuit that derrick pins is in, make the oil circuit that derrick pins is in, make the oil circuit that derrick pins is in, make the oil circuit that derrick pins is in, make the oil circuit that derrick pins is in, make the oil circuit that derrick pins is in

[0023] Furthermore, a first balancing valve group is provided on the first oil outlet pipeline, and the first balancing valve group includes a first overflow valve and a first one-way valve. The oil inlet end of the first overflow valve is connected to the oil inlet end of the motor through the first oil outlet pipeline, the oil outlet end of the first 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 first one-way valve is connected to the oil outlet end of the first overflow valve, and the oil outlet end of the first one-way valve is connected to the oil inlet end of the first overflow valve.

[0024] The above arrangement, by providing the first balancing valve group, stabilizes the flow rate of the hydraulic oil circulating on the first oil outlet pipeline.

[0025] Furthermore, a second switch valve is provided between the first oil outlet pipeline and the oil inlet end of the pilot-operated relief valve.

[0026] 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.

[0027] Furthermore, it also includes a brake valve group, which includes a brake reversing valve and a brake valve. 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 pipe and the first oil return pipe.

[0028] 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 connecting the P end of the brake reversing valve to the A end, thereby allowing the oil tank to output hydraulic oil to the control end of the brake valve and open the brake valve to ensure that the motor can rotate.

[0029] 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.

[0030] 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

[0031] Figure 1 Schematic diagram of the hydraulic system of the present invention.

[0032] Figure 2 for Figure 1 Enlarged view of point D in the middle.

[0033] Figure 3 It is the workflow diagram of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1-Figure 2As shown, a hydraulic system includes a pilot-operated relief valve 1, a motor 2 and an oil tank 3. The oil tank 3 is provided with a first oil port 31 and a second oil port 32. The first oil port 31 is connected to the oil inlet end 21 of the motor 2 through a first oil outlet pipe 33. The oil outlet end 22 of the motor 2 is connected to the second oil port 32 of the oil tank 3 through a first oil return pipe 34. A pilot-operated relief valve 1 is provided between the first oil outlet pipe 33 and the first oil return pipe 34. The oil inlet end of the pilot-operated relief valve 1 is connected to the oil inlet end 21 of the motor 2. The first oil outlet pipeline 33, 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 not reversing, and 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.

[0036] An oil pressure regulating valve group 4 is provided between the first switch valve 12 and the fuel tank 3. 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 fuel tank 3, the A end of the regulating reversing valve 41 is connected to the fuel tank 3 through the first pressure valve 42, and the B end of the regulating reversing valve 41 is connected to the fuel 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 providing an oil pressure regulating valve assembly 4, and by having the first pressure valve 42 and the second pressure valve 43 have different regulating pressures, the regulating reversing valve 41 can be switched according to actual needs, thereby enabling adjustment to the control oil pressure required by the pilot relief valve 1, thereby facilitating the oil pressure control of the hydraulic oil in the first oil outlet pipeline 33. When the control oil pressure is 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 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 control oil pressure is 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 also provided on the pilot oil circuit 11 of the pilot relief valve 1. The spring 10 and the control oil pressure of the pilot oil circuit 11 drive the internal oil circuit of the pilot relief valve 1 to close.

[0037] like Figure 1 and Figure 2As shown, a first balancing valve group 5 is provided on the first oil outlet pipeline 33. The first balancing valve group 5 includes a first relief valve 51 and a first check valve 52. The oil inlet of the first relief valve 51 is connected to the oil inlet 21 of the motor 2 via the first oil outlet pipeline 33. The oil outlet of the first relief valve 51 is connected to the first oil port 31 of the oil tank 3 via the first oil outlet pipeline 33. The oil inlet of the first check valve 52 is connected to the oil outlet of the first relief valve 51, and the oil outlet of the first check valve 52 is connected to the oil inlet of the first relief valve 51. By providing the first balancing valve group 5, the flow rate of the hydraulic oil flowing in the first oil outlet pipeline 33 is stabilized.

[0038] like Figure 2 As shown, a second switch valve 13 is provided between the first oil outlet pipe 33 and the oil inlet end of the pilot relief valve 1. By providing the second switch valve 13, the pilot relief valve 1 is closed when it is not needed to drain oil, thereby preventing the hydraulic oil from being unloaded.

[0039] like Figure 1 and Figure 2 As shown, the brake valve assembly includes a brake reversing valve 81 and a brake valve 82. The brake valve 82 is installed 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, and the A end of the brake reversing valve 81 is connected to the control end of the brake valve 82. 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 providing the brake valve 82, when the motor is to be driven, the hydraulic oil passing through the first oil outlet pipeline 33 and the first oil return pipeline 34 flows to the control end of the brake reversing valve 81, thereby driving the brake reversing valve 81 to reverse and connect the P end of the brake reversing valve 81 to the A end. As a result, the oil tank 3 outputs hydraulic oil to the control end of the brake valve 82, opening the brake valve 82 and ensuring that the motor 2 can rotate.

[0040] A brake shuttle valve 84 is provided between the first oil outlet pipeline 33 and the first oil return pipeline 34. 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. The provision of the brake shuttle valve 84 prevents conflict between 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.

[0041] like Figure 3 As shown, a rope collection control method includes the following steps:

[0042] (1) The oil tank outputs hydraulic oil to the motor through the first oil outlet pipe, driving the motor to rotate and reel in the rope.

[0043] (2) A portion of the hydraulic oil in the first oil outlet pipe flows into the pilot oil circuit of the pilot-operated relief valve and drives the pilot-operated relief valve to close.

[0044] (3) During the rope reeling process, if the motor rotates too fast, the oil pressure in the first oil outlet pipeline will increase.

[0045] (4) Control the conduction of the first switch valve.

[0046] (5) A portion of the hydraulic oil in the pilot oil circuit of the pilot-operated relief valve flows back to the oil tank through the first switch valve to determine the first pressure valve or the second pressure valve as needed, and the control oil pressure of the pilot-operated relief valve increases or decreases.

[0047] (51) When the pressure of the control oil pressure is to be increased.

[0048] (52) Control the reversing of the regulating reversing valve 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.

[0049] (53) When the control oil pressure is to be reduced.

[0050] (54) Control the reversing of the regulating reversing valve so that the P end of the regulating reversing valve is connected to the B end, and the hydraulic oil in the pilot oil circuit of the pilot relief valve flows back to the oil tank through the second pressure valve.

[0051] (6) When the oil pressure in the first oil outlet pipeline is greater than the control oil pressure of the pilot relief valve, the pilot relief valve opens.

[0052] (7) The hydraulic oil in the first oil outlet pipe flows to the first oil return pipe through the pilot overflow valve, and then flows back to the oil tank through the first oil return pipe.

[0053] The working principle of the present invention is as follows: by setting a pilot-operated relief valve 1, when the winch needs to retract 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 retraction. During the rope retraction 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-operated relief valve 1, a control oil pressure is formed by the hydraulic oil flowing into the pilot oil circuit 11 of the pilot-operated 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-operated 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 switching 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 pipe 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 pipe 33 can flow to the first return oil pipe 34 through the pilot relief valve 1, and then the hydraulic oil flows back to the oil tank through the first return oil pipe 34, thereby preventing the hydraulic oil pressure in the first oil outlet pipe 33 from being too high, thereby ensuring stable rotation of the motor and maintaining a constant tension in the cable, preventing the cable from being tightened and breaking.

Claims

1. A rope collection control method implemented by a hydraulic system, characterized in that: The specific steps include: (1) The oil tank outputs hydraulic oil to the motor through the first oil outlet pipe, driving the motor to rotate and reel in the rope; (2) A portion of the hydraulic oil in the first oil outlet pipeline flows into the pilot oil circuit of the pilot-operated relief valve and drives the pilot-operated relief valve to close; (3) During the rope retraction process, if the motor rotates too fast, the oil pressure in the first oil outlet pipe increases; (4) Controlling the conduction of the first switch valve; (5) A portion of the hydraulic oil in the pilot oil circuit of the pilot relief valve flows back to the oil tank through the first switch valve to determine the first pressure valve or the second pressure valve as needed, and the control oil pressure of the pilot relief valve increases or decreases; (51) When the pressure of the control oil pressure is to be increased; (52) Control the reversing of the regulating reversing valve 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; (53) When the control oil pressure is to be reduced; (54) Control the reversing of the regulating reversing valve so that the P end of the regulating reversing valve is connected to the B end, and the hydraulic oil in the pilot oil circuit of the pilot relief valve flows back to the oil tank through the second pressure valve; (6) When the oil pressure in the first oil outlet pipeline is greater than the control oil pressure of the pilot relief valve, the pilot relief valve opens; (7) The hydraulic oil in the first oil outlet pipe flows to the first oil return pipe through the pilot relief valve, and then flows back to the oil tank through the first oil return pipe; The hydraulic system includes a pilot-operated 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 of the motor through a first oil outlet pipe, and the oil outlet of the motor is connected to the second oil port of the oil tank through a first oil return pipe. A pilot-operated relief valve is provided between the first oil outlet pipe and the first oil return pipe. The oil inlet of the pilot-operated relief valve is connected to the first oil outlet pipe. A second switch valve is provided between the first oil outlet pipe and the oil inlet of the pilot-operated relief valve. The oil outlet of the pilot-operated relief valve is connected to the first oil return pipe. The pilot oil circuit of the pilot-operated relief valve is connected to the oil tank through the first switch valve. An oil pressure regulating valve group is provided between the first switch valve and the oil tank. 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 via the first pressure valve, and the B end of the regulating reversing valve is connected to the oil tank via the second pressure valve. The regulating pressure of the first pressure valve is greater than the regulating pressure of the second pressure valve. It also includes a brake valve group, which includes a brake reversing valve and a brake valve. 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.

2. A rope collection control method according to claim 1, characterized in that: A first balancing valve group is provided on the first oil outlet pipeline, and the first balancing valve group includes a first overflow valve and a first check valve. The oil inlet end of the first overflow valve is connected to the oil inlet end of the motor through the first oil outlet pipeline, the oil outlet end of the first 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 first check valve is connected to the oil outlet end of the first overflow valve, and the oil outlet end of the first check valve is connected to the oil inlet end of the first overflow valve.

3. A rope collection control method according to claim 1, 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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