A winch stowage hydraulic system

Abstract

The application provides a winch storage hydraulic system, comprising 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 an oil inlet end of the motor through a first oil outlet pipeline, an 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 overflow valve is arranged between the first oil outlet pipeline and the first oil return pipeline, an oil inlet end of the pilot overflow valve is connected with the first oil outlet pipeline, an oil outlet end of the pilot overflow valve is connected with the first oil return pipeline, a pilot oil path of the pilot overflow valve is connected with the oil tank through a first switch valve, the first switch valve is in a closed state when not switching, the pilot oil path of the pilot overflow valve is also connected with the first oil outlet pipeline, and hydraulic oil of the first oil outlet pipeline flows into the pilot oil path of the pilot overflow valve to drive an internal oil path of the pilot overflow valve to be closed; the above structure can control the stable rotation of the motor when the winch stores a rope, so that the cable can be kept in a constant tension state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of winch control systems, in particular to a winch storage hydraulic system. BACKGROUND

[0002] A winch is a small lifting device that lifts or pulls heavy objects by winding steel wire ropes or chains on a drum. Due to its simple operation and strong load capacity, it is widely used in marine engineering, ships, coal mines, wharfs, mines, bridges, etc. In the marine environment, the hydraulic control system is usually used to control the rotation of the hydraulic motor, and then the hydraulic motor drives the winch to operate, thereby completing the operation of winding and unwinding the rope and other operations related to the winch.

[0003] A winch hydraulic control system is disclosed in Chinese patent application No. 202310244642.5, published on July 4, 2023, which includes a hydraulic oil tank, a hydraulic pump, and an electric motor. The oil inlet of the hydraulic pump is in communication with the hydraulic oil tank, and the electric motor is connected to the hydraulic pump. The oil outlet of the hydraulic pump is in communication with 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 in communication with 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 in communication with the B port of the second electromagnetic reversing valve. The B port and the C port of the first shuttle valve are respectively in communication with 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 in communication with 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 in communication with the rod cavity of the brake. The brake is connected to the hydraulic motor. The oil outlet of the control valve group is in communication with the oil inlet of the balance valve group. This design can maintain constant tension of the steel wire rope and stable operation.

[0004] As the prior art in this document, if the winch motor rotates too fast when the winch is storing the cable, the cable may be pulled tight, which may cause the cable to break and ultimately damage the cargo and personnel. SUMMARY

[0005] The present application provides a winch storage hydraulic system, which can control the stable rotation of the motor when the winch is winding the rope, maintain the constant tension of the cable, and control the flow of the oil circuit.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the present application is: a winch storage hydraulic system, comprising 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, 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 overflow valve is arranged between the first oil outlet pipeline and the first oil return pipeline, the oil inlet end of the pilot overflow valve is connected with the first oil outlet pipeline, and the oil outlet end of the pilot overflow valve is connected with the first oil return pipeline, the pilot oil way of the pilot overflow valve is connected with the oil tank through a first switch valve, the first switch valve is in a closed state when not switching, and the pilot oil way of the pilot overflow valve is also connected with the first oil outlet pipeline, and the hydraulic oil in the first oil outlet pipeline flows into the pilot oil way of the pilot overflow valve to drive the internal oil way of the pilot overflow valve to be closed.

[0007] A first balance valve group and a second balance valve group are arranged on the first oil outlet pipeline, the first balance valve group comprises a first overflow valve and a first check valve, the oil inlet end of the first overflow valve is connected with the oil inlet end of the motor through the first oil outlet pipeline, the oil outlet end of the first overflow valve is connected with 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 with the oil outlet end of the first overflow valve, and the oil outlet end of the first check valve is connected with the oil inlet end of the first overflow valve. By arranging the first balance valve group, the flow stability of the hydraulic oil flowing through the first oil outlet pipeline is realized.

[0008] The second balance valve group comprises a second overflow valve and a second check valve, the oil inlet end of the second overflow valve is connected with the oil inlet end of the motor through the first oil outlet pipeline, the oil outlet end of the second overflow valve is connected with 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 with the oil outlet end of the second overflow valve, and the oil outlet end of the second check valve is connected with the oil inlet end of the second overflow valve. By arranging the second balance valve group, the flow stability of the hydraulic oil flowing through the first oil outlet pipeline is realized.

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

[0010] The above arrangement, by arranging two overflow valves with different flow, can realize switching of different balance valves according to actual needs, thereby realizing control of the hydraulic oil flow of the first oil outlet pipeline.

[0011] The structure has the advantages that when the winch needs to wind up the cable, the oil tank delivers hydraulic oil to one end of the motor through the first oil outlet pipeline to drive the motor to rotate, thereby realizing winding of the cable, and in the process of winding of the cable, if the rotating speed of the motor is too fast, the oil pressure of the hydraulic oil delivered by the oil tank is increased, the first oil outlet pipeline is connected with the pilot oil passage of the pilot overflow valve, a control oil pressure is formed on the pilot oil passage of the pilot overflow valve by the inflow of the hydraulic oil, at this time, the control oil pressure is greater than the oil pressure of the hydraulic oil in the first oil outlet pipeline, the pilot overflow valve cannot be opened, when the first on-off valve is turned on, part of the hydraulic oil in the pilot oil passage of the pilot overflow valve flows back to the oil tank through the first on-off valve, thereby reducing the control oil pressure, when the oil pressure of the hydraulic oil in the first oil outlet pipeline is greater than the control oil pressure of the pilot oil passage of the pilot overflow valve, the pilot overflow valve can be opened, the hydraulic oil in the first oil outlet pipeline can flow to the first oil return pipeline through the pilot overflow valve, thereby flowing back to the oil tank through the first oil return pipeline, thereby preventing the oil pressure of the hydraulic oil in the first oil outlet pipeline from being too high, thereby stabilizing the rotation of the motor and keeping the cable in a constant tension state, preventing the cable from being broken due to being pulled tight.

[0012] Further, the oil pressure adjusting valve group is arranged between the first on-off valve and the oil tank, the oil pressure adjusting valve group comprises an adjusting directional control valve, a first pressure valve and a second pressure valve, the P end of the adjusting directional control valve is connected with the first on-off valve, the T end of the adjusting directional control valve is connected with the oil tank, the A end of the adjusting directional control valve is connected with the oil tank through the first pressure valve, the B end of the adjusting directional control valve is connected with the oil tank through the second pressure valve, and the adjusting pressure of the first pressure valve is greater than the adjusting pressure of the second pressure valve.

[0013] The above arrangement has the advantages that the oil pressure adjusting valve group is arranged, the adjusting pressure of the first pressure valve is different from the adjusting pressure of the second pressure valve, thereby being able to adjust the directional control valve according to actual needs, thereby being able to adjust the control oil pressure required by the pilot overflow valve, and being convenient for controlling the oil pressure of the hydraulic oil in the first oil outlet pipeline, when the control oil pressure needs to be increased, the directional control valve is controlled to be switched, the P end of the directional control valve is communicated with the A end, the hydraulic oil in the pilot oil passage of the pilot overflow valve flows back to the oil tank through the first pressure valve, thereby ensuring that the control oil pressure of the pilot overflow valve can be adjusted to the pressure set by the first pressure valve, and when the control oil pressure needs to be reduced, the P end of the directional control valve is communicated with the B end.

[0014] Further, a second on-off valve is arranged between the first oil outlet pipeline and the oil inlet end of the pilot overflow valve, and the two ends of the second on-off valve are respectively connected with the first oil outlet pipeline and the pilot overflow valve.

[0015] The above arrangement has the advantages that the second on-off valve is arranged, thereby being able to be closed when the pilot overflow valve is not needed to be used to discharge oil, thereby preventing the hydraulic oil from being discharged.

[0016] Further, a brake valve group is further included, the brake valve group includes a brake directional valve and a brake valve, the brake valve is arranged on the motor, the P end of the brake directional valve is connected with the oil tank, the T end of the brake directional valve is connected with the oil tank, the A end of the brake directional valve is connected with the control end of the brake valve, and the control end of the brake directional valve is connected with the first oil outlet pipeline and the first oil return pipeline.

[0017] The above arrangement, by arranging the brake valve, when the motor is to be driven, the hydraulic oil flowing through the first oil outlet pipeline and the first oil return pipeline flows to the control end of the brake directional valve, so as to drive the brake directional valve to change direction and make the P end of the brake directional valve communicate with the A end, thereby making the oil tank output hydraulic oil to the control end of the brake valve and opening the brake valve, so as to ensure that the motor can rotate.

[0018] Further, a brake shuttle valve is arranged between the first oil outlet pipeline and the first oil return pipeline, the first port of the brake shuttle valve is connected with the first oil outlet pipeline, the second port of the brake shuttle valve is connected with the first oil return pipeline, and the third port of the brake shuttle valve is connected with the control end of the brake directional valve.

[0019] The above arrangement, by arranging the brake shuttle valve, the hydraulic oil flowing through the first oil outlet pipeline and the first oil return pipeline to the control end of the brake directional valve does not conflict with each other. BRIEF DESCRIPTION OF DRAWINGS

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

[0021] Figure 2 It is Figure 1 It is an enlarged view of D in the middle. DETAILED DESCRIPTION

[0022] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0023] As Figures 1-2As shown, a winch storage hydraulic system includes a pilot 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 pipeline 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 pipeline 34, the pilot relief valve 1 is arranged between the first oil outlet pipeline 33 and the first oil return pipeline 34, the oil inlet end of the pilot relief valve 1 is connected to 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 way 11 of the pilot relief valve 1 is connected to the oil tank 2 through a first switch valve 12, the first switch valve 12 is in a closed state when it does not change direction, the pilot oil way 11 of the pilot relief valve 1 is also connected to the first oil outlet pipeline 33, and the hydraulic oil in the first oil outlet pipeline 33 flows into the pilot oil way 11 of the pilot relief valve 1 to drive the internal oil way of the pilot relief valve 1 to close.

[0024] An oil pressure adjusting valve group 4 is arranged between the first switch valve 12 and the oil tank 3, the oil pressure adjusting valve group 4 includes an adjusting directional valve 41, a first pressure valve 42 and a second pressure valve 43, the P end of the adjusting directional valve 41 is connected to the first switch valve 12, the T end of the adjusting directional valve 41 is connected to the oil tank 3, the A end of the adjusting directional valve 41 is connected to the oil tank 3 through the first pressure valve 42, the B end of the adjusting directional valve 41 is connected to the oil tank 3 through the second pressure valve 42, and the adjusting pressure of the first pressure valve 42 is greater than that of the second pressure valve 43. By arranging the oil pressure adjusting valve group 4 and adjusting the pressure of the first pressure valve 42 and the second pressure valve 43, the adjusting directional valve 41 can be changed direction according to actual needs, so that the control oil pressure required by the pilot relief valve 1 can be adjusted, and the oil pressure control of the hydraulic oil in the first oil outlet pipeline 33 is facilitated. When the pressure of the control oil pressure needs to be increased, the adjusting directional valve 41 is controlled to change direction, so that the P end of the adjusting directional valve 41 is communicated with the A end, and the hydraulic oil in the pilot oil way 11 of the pilot relief valve 1 flows back to the oil tank through the P end and the A end of the adjusting directional valve 41 and then through the first pressure valve 42, so as to ensure 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 adjusting directional valve 41 is communicated with the B end. In this embodiment, a spring 10 is also arranged on the pilot oil way 11 of the pilot relief valve 1, and the spring 10 drives the internal oil way of the pilot relief valve 1 to close under the control of the control oil pressure of the pilot oil way 11

[0025] As shown in the figure, Figure 1 and Figure 2As shown, the first balancing valve group 5 is arranged on the first oil outlet pipeline 33, and the first balancing valve group 5 comprises 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. 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. The oil outlet end of the first check valve 52 is connected to the oil inlet end of the first overflow valve 51. By arranging the first balancing valve group 5, the flow of the hydraulic oil flowing through the first oil outlet pipeline 33 is stabilized.

[0026] The second balancing valve group 6 is also arranged on the first oil outlet pipeline 33, and the second balancing valve group 6 comprises 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. The oil outlet end of the second check valve 62 is connected to the oil inlet end of the second overflow valve 61. By arranging the second balancing valve group 6, the flow of the hydraulic oil flowing through the first oil outlet pipeline 33 is stabilized.

[0027] As shown in Figure 2 , the control ends of the first overflow valve 51 and the second overflow valve 61 are connected to the oil tank 3 through a balance reversing valve 7. The P end of the balance reversing valve 7 is connected to the oil tank. The T end of the balance reversing valve 7 is connected to the oil tank. The A end of the balance reversing valve 7 is connected to the control end 53 of the first overflow valve 51. The B end of the balance reversing valve 7 is connected to the control end 63 of the second overflow valve 61. The flow of the first overflow valve 51 is greater than the flow of the second overflow valve 61. By arranging two overflow valves with different flows, different balancing valves can be switched according to actual needs, thereby controlling the flow of the hydraulic oil of the first oil outlet pipeline 33.

[0028] As shown in Figure 2 , a second switch valve 13 is arranged between the first oil outlet pipeline 33 and the oil inlet end of the pilot overflow valve 1. The two ends of the second switch valve 13 are respectively connected to the first oil outlet pipeline 33 and the pilot overflow valve 1. By arranging the second switch valve 13, the pilot overflow valve 1 can be closed when it is not needed to be used for oil discharge, preventing the hydraulic oil from being unloaded.

[0029] As shown in 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 arranging 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 communicate with the A end, thereby making the oil tank 3 output hydraulic oil to the control end of the brake valve 82 and opening the brake valve 82 to ensure that the motor 2 can rotate.

[0030] A brake shuttle valve 84 is arranged between the first oil outlet pipeline 33 and the first oil return pipeline 34, the first port 85 of the brake shuttle valve 84 is connected to the first oil outlet pipeline 33, the second port 86 of the brake shuttle valve 84 is connected to the first oil return pipeline 34, and the third port 87 of the brake shuttle valve 84 is connected to the control end of the brake reversing valve 81. By arranging the brake shuttle valve 84, the hydraulic oil flowing to the control end of the brake reversing valve 81 from the first oil outlet pipeline 33 and the first oil return pipeline 34 does not conflict with each other.

[0031] The working principle of the present application: by arranging the pilot overflow valve 1, when the winch needs to collect the cable, the oil tank delivers hydraulic oil to one end of the motor through the first oil outlet pipeline 33 to drive the motor to rotate, thereby realizing the collection of the cable. During the process of collecting the cable, if the motor rotates too fast, the oil pressure of the hydraulic oil delivered by the oil tank rises, and since the first oil outlet pipeline 33 is connected to the pilot oil way 11 of the pilot overflow valve 1, a control oil pressure is formed on the pilot oil way 11 of the pilot overflow valve 1 by the inflow of hydraulic oil. At this time, the control oil pressure is greater than the oil pressure of the hydraulic oil in the first oil outlet pipeline 33, and the pilot overflow valve 1 cannot be opened. When the first on-off valve 12 reverses, part of the hydraulic oil in the pilot oil way 11 of the pilot overflow valve 1 flows back to the oil tank through the first on-off valve 12, thereby reducing the control oil pressure. When the oil pressure of the hydraulic oil in the first oil outlet pipeline 33 is greater than the control oil pressure of the pilot oil way 11 of the pilot overflow valve 1, the pilot overflow valve 1 can be opened, so that the hydraulic oil in the first oil outlet pipeline 33 can flow to the first oil return pipeline 34 through the pilot overflow valve 1, and then the hydraulic oil flows back to the oil tank through the first oil return pipeline 34, thereby preventing the oil pressure of the hydraulic oil in the first oil outlet pipeline 33 from being too high, so that the motor rotates stably, and the cable maintains a constant tension state, preventing the cable from being pulled tight and broken.

Claims

1. A winch stowable hydraulic system characterized by: The 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, 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 overflow valve is arranged between the first oil outlet pipeline and the first oil return pipeline, the oil inlet end of the pilot overflow valve is connected with the first oil outlet pipeline, the oil outlet end of the pilot overflow valve is connected with the first oil return pipeline, the pilot oil way of the pilot overflow valve is connected with the oil tank through a first switch valve, the first switch valve is in a closed state when not switching, the pilot oil way of the pilot overflow valve is also connected with the first oil outlet pipeline, the hydraulic oil in the first oil outlet pipeline flows into the pilot oil way of the pilot overflow valve to drive the internal oil way of the pilot overflow valve to be closed; a first balance valve group and a second balance valve group are arranged on the first oil outlet pipeline, the first balance valve group comprises a first overflow valve and a first check valve, the oil inlet end of the first overflow valve is connected with the oil inlet end of the motor through the first oil outlet pipeline, the oil outlet end of the first overflow valve is connected with 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 with the oil outlet end of the first overflow valve, and the oil outlet end of the first check valve is connected with the oil inlet end of the first overflow valve; the second balance valve group comprises a second overflow valve and a second check valve, the oil inlet end of the second overflow valve is connected with the oil inlet end of the motor through the first oil outlet pipeline, the oil outlet end of the second overflow valve is connected with 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 with the oil outlet end of the second overflow valve, and the oil outlet end of the second check valve is connected with the oil inlet end of the second overflow valve; the control ends of the first overflow valve and the second overflow valve are connected with the oil tank through a balance switch valve, the P end of the balance switch valve is connected with the oil tank, the T end of the balance switch valve is connected with the oil tank, the A end of the balance switch valve is connected with the control end of the first overflow valve, the B end of the balance switch valve is connected with the control end of the second overflow valve, and the flow of the first overflow valve is greater than that of the second overflow valve.

2. A winch stowable hydraulic system according to claim 1, characterized in that: an oil pressure adjusting valve group is arranged between the first switch valve and the oil tank, the oil pressure adjusting valve group comprises an adjusting switch valve, a first pressure valve and a second pressure valve, the P end of the adjusting switch valve is connected with the first switch valve, the T end of the adjusting switch valve is connected with the oil tank, the A end of the adjusting switch valve is connected with the oil tank through the first pressure valve, the B end of the adjusting switch valve is connected with the oil tank through the second pressure valve, and the adjusting pressure of the first pressure valve is greater than that of the second pressure valve.

3. A winch stowable hydraulic system as claimed in claim 1, wherein: a second switch valve is arranged between the first oil outlet pipeline and the oil inlet end of the pilot overflow valve, and the two ends of the second switch valve are connected with the first oil outlet pipeline and the oil inlet end of the pilot overflow valve respectively.

4. A winch stowable hydraulic system as claimed in claim 1, wherein: a brake valve group is further arranged, the brake valve group comprises a brake switch valve and a brake valve, the brake valve is arranged on the motor, the P end of the brake switch valve is connected with the oil tank, the T end of the brake switch valve is connected with the oil tank, the A end of the brake switch valve is connected with the control end of the brake valve, and the control end of the brake switch valve is connected with the first oil outlet pipeline and the first oil return pipeline.

5. A winch stowable hydraulic system as claimed in claim 4, wherein: A brake shuttle valve is arranged between the first oil outlet pipeline and the first oil return pipeline, a first port of the brake shuttle valve is connected with the first oil outlet pipeline, a second port of the brake shuttle valve is connected with the first oil return pipeline, and a third port of the brake shuttle valve is connected with the control end of the brake reversing valve.

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