A hydraulic winch emergency release control system

Abstract

The utility model relates to the technical field of lifting equipment, and in particular to a hydraulic winch emergency release control system, comprising a hydraulic motor, a manual hydraulic pump, a throttle valve and an oil cylinder for controlling the hydraulic motor to brake, the A port and the B port of the hydraulic motor are respectively connected to the A oil circuit and the B oil circuit, and the A oil circuit is also connected to the rod chamber of the oil cylinder; the two ports of the throttle valve are respectively connected to the A oil circuit and the B oil circuit, and the A port of the hydraulic motor, the throttle valve and the B port of the hydraulic motor can be connected in sequence to form a circulating closed loop; the A oil circuit is also provided with a balance valve, which is used to prevent the hydraulic oil from flowing from the node position where the throttle valve is connected to the A oil circuit to the rod chamber, and the manual hydraulic pump is connected to the rod chamber. When the hydraulic winch is powered off in the middle of work, the manual hydraulic pump supplies hydraulic oil to the oil cylinder, so that the hydraulic motor is in a non-braking state, and at the same time, the throttle valve is opened, and the hydraulic oil will flow from the A port of the hydraulic motor to the B port of the hydraulic motor, so that the hydraulic winch slowly lowers the goods.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting equipment, in particular to an emergency release control system for a hydraulic winch. Background Art

[0002] The hydraulic winch is a common lifting equipment, which drives the winch of the hoisting device to rotate through a hydraulic motor to drive the rope of the hoisting device to lift and lower the cargo; the brake of the winch driven by the hydraulic motor is controlled by the brake device. When the hydraulic winch is in working state, the brake device is in the open state; when the hydraulic winch is in the stopped state, the brake device is in the locked state. However, when an unexpected power outage occurs, the brake cylinder of the brake device stops working due to the interruption of hydraulic oil supply, causing the brake of the winch driven by the hydraulic motor to automatically lock, which will pose a safety hazard if the winch is hoisting cargo.

[0003] In summary, when the existing hydraulic winch loses power during operation, if the winch is hanging cargo, the cargo will be suspended in the air and cannot be lowered safely. Utility Model Content

[0004] One of the main purposes of the utility model is to provide a hydraulic winch emergency release control system, which aims to solve the technical problem that when the existing hydraulic winch loses power during work, if the winch is hanging cargo, the cargo will be suspended in the air and cannot be safely lowered.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a hydraulic winch emergency release control system, including a hydraulic motor and a cylinder for controlling the hydraulic motor to brake, the A port and the B port of the hydraulic motor are respectively connected to the A oil circuit and the B oil circuit, and the A oil circuit is also connected to the rod chamber of the cylinder; the hydraulic winch emergency release control system also includes a manual hydraulic pump and a throttle valve, the two ports of the throttle valve are respectively connected to the A oil circuit and the B oil circuit, the A port of the hydraulic motor, the throttle valve and the B port of the hydraulic motor can be connected in sequence to form a circulating closed loop; the A oil circuit is also provided with a balancing valve, and the balancing valve is used to prevent the hydraulic oil from flowing from the node position where the throttle valve is connected to the A oil circuit to the rod chamber of the cylinder, and the manual hydraulic pump is connected to the rod chamber of the cylinder.

[0006] Furthermore, the hydraulic winch emergency release control system also includes a shuttle valve, a first inlet of the shuttle valve is connected to the A oil circuit, a second inlet of the shuttle valve is connected to the B oil circuit, and the A oil circuit is connected to the rod chamber of the brake cylinder through the outlet of the shuttle valve.

[0007] Furthermore, the hydraulic winch emergency release control system also includes a pressure reducing valve, and the outlet of the shuttle valve is connected to the rod chamber of the oil cylinder through the pressure reducing valve.

[0008] Furthermore, the balancing valve is also connected to the B oil circuit for balancing the oil pressures of the A oil circuit and the B oil circuit.

[0009] Furthermore, the hydraulic winch emergency release control system also includes a main control valve, which includes a valve port A, a valve port B, an oil inlet P, and an oil return port T. The oil inlet P is used to supply oil to the main control valve, the valve port A is connected to the A oil circuit, the valve port B is connected to the B oil circuit, and the oil return port T is connected to the oil tank.

[0010] Furthermore, the oil drain port of the hydraulic motor is connected to the oil tank.

[0011] Furthermore, the manual hydraulic pump is communicated with the rod chamber through a pipeline that is communicated with the rod chamber through the pressure reducing valve.

[0012] Furthermore, a throttling unit is also provided on the oil outlet pipeline of the manual hydraulic pump.

[0013] Furthermore, a pressure gauge is provided on the oil outlet pipeline of the manual hydraulic pump.

[0014] Furthermore, a one-way valve is also provided on the oil outlet pipeline of the manual hydraulic pump.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] When the hydraulic winch emergency release control system of the utility model is in use, when the hydraulic winch loses power during operation, the oil supply from the A oil circuit to the oil cylinder of the brake device is interrupted, so that the brake device is in a locked state. At this time, the hydraulic oil is supplied to the oil cylinder through the manual hydraulic pump to unlock the brake device, so that the hydraulic motor is in a non-braking state, and the throttle valve is opened at the same time. At this time, the balance valve prevents the hydraulic oil from flowing from the node position where the throttle valve is connected to the A oil circuit to the rod chamber of the oil cylinder, and the hydraulic oil will flow from the A port to the B port of the hydraulic motor, so that the hydraulic winch slowly lowers the cargo, and the speed of the cargo lowering can be determined by setting the flow rate of the throttle valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a schematic diagram of the hydraulic oil circuit of the hydraulic winch emergency release control system of the utility model.

[0018] Reference numerals in the accompanying drawings:

[0019] 1. Hydraulic motor; 2. Cylinder; 3. Throttle valve; 4. Main control valve; 5. Pressure reducing valve; 6. Manual hydraulic pump; 60. Throttle unit; 61. Pressure gauge; 7. Balance valve; 71. Shuttle valve; 8. Oil circuit A; 81. Oil circuit B; 9. Oil tank. DETAILED DESCRIPTION

[0020] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] In the description of the present invention, it should be understood that the terms "width", "up", "down", "front", "back", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0024] Please refer to Figure 1 The utility model provides a hydraulic winch emergency release control system, including a hydraulic motor 1, an oil cylinder 2, a throttle valve 3, a main control valve 4, a pressure reducing valve 5, a manual hydraulic pump 6, and a balance valve 7.

[0025] The oil cylinder 2 is the oil cylinder 2 of the brake device (not shown) of the hydraulic motor 1, which is used to control the hydraulic motor 1 to brake. When the hydraulic winch is in working state, when the hydraulic oil enters the rod chamber of the oil cylinder 2, the hydraulic oil overcomes the spring force of the rodless chamber of the oil cylinder 2, and pushes the piston of the oil cylinder 2 to move to the right (such as Figure 1 As shown), the brake device is in an open state, thereby putting the hydraulic motor 1 in a non-braking state; when the hydraulic winch is in a stopped working state, the hydraulic oil supply to the cylinder 2 is interrupted, making the brake device in a locked state, thereby putting the hydraulic motor 1 in a braking state.

[0026] The A port and B port of the hydraulic motor 1 are connected to the A oil circuit 8 and the B oil circuit 81 respectively, and the A oil circuit 8 is also connected to the rod chamber of the cylinder 2; the two ports of the throttle valve 3 are respectively connected to the A oil circuit 8 and the B oil circuit 81; the A port of the hydraulic motor 1, the throttle valve 3 and the B port of the hydraulic motor 1 can be connected in sequence to form a circulating closed loop, and the oil drain port of the hydraulic motor 1 is connected to the oil tank 9; the balancing valve 7 is arranged on the A oil circuit 8 and connected to the B oil circuit 81, and the balancing valve 7 is used to balance the oil pressure of the A oil circuit 8 and the B oil circuit 81. In addition, the throttle valve 3 can also prevent the hydraulic oil from flowing from the node position where the throttle valve 3 and the A oil circuit 8 are connected to the rod chamber of the cylinder 2; the manual hydraulic pump 6 is connected to the rod chamber of the cylinder 2. When the hydraulic winch emergency release control system of the utility model is in use, if the hydraulic winch is powered off during operation, the A oil circuit 8 interrupts the oil supply to the oil cylinder 2 of the brake device, so that the brake device is in a locked state, that is, the hydraulic motor 1 is in a braking state. At this time, the manual hydraulic pump 6 supplies hydraulic oil to the oil cylinder 2 to unlock the brake device, so that the hydraulic motor 1 is in a non-braking state, and at the same time, the throttle valve 3 is opened to connect the circulating closed loop. At this time, the balance valve 7 prevents the hydraulic oil from flowing from the node position where the throttle valve 3 and the A oil circuit 8 are connected to the rod chamber of the oil cylinder 2. The hydraulic oil will flow out from the A port of the hydraulic motor 1, pass through the throttle valve 3, and then flow to the B port of the hydraulic motor, so that the hydraulic winch slowly lowers the lifted cargo, and the speed of cargo descent can be determined by setting the flow rate of the throttle valve 3. The throttle valve 3 can adjust the flow rate of the hydraulic oil.

[0027] In this embodiment, the first inlet P1 of the shuttle valve 71 is connected to the A oil circuit 8, the second inlet P2 of the shuttle valve 71 is connected to the B oil circuit 81, and the A oil circuit 8 is connected to the rod chamber of the oil cylinder 2 through the outlet A1 of the shuttle valve 71. In this way, the hydraulic oil that drives the piston of the oil cylinder 2 to move rightward can come from the A oil circuit 8 or from the B oil circuit 81. For example, when the hydraulic winch is in working state, there are two working conditions:

[0028] Working condition 1: The hydraulic oil enters the hydraulic motor 1 from the A oil circuit 8. When the hydraulic oil enters the hydraulic motor 1 from the A oil circuit 8, one hydraulic oil in the A oil circuit 8 enters the A port of the hydraulic motor 1, and the other hydraulic oil in the A oil circuit 8 enters the shuttle valve 71 from the first inlet P1 of the shuttle valve 71, and then enters the rod chamber of the oil cylinder 2 from the outlet A1 of the shuttle valve 71, pushing the piston of the oil cylinder 2 to move rightward, overcoming the spring force of the rodless chamber, and putting the hydraulic motor 1 in a non-braking state; and the hydraulic oil entering the hydraulic motor 1 is discharged from the B port of the hydraulic motor 1, realizing the forward rotation of the hydraulic motor 1, so that the goods hoisted by the hydraulic winch are lowered.

[0029] Working condition two: the hydraulic oil enters the hydraulic motor 1 from the B oil circuit 81. When the hydraulic oil enters the hydraulic motor 1 from the B oil circuit 81, one hydraulic oil in the B oil circuit 81 enters the B port of the hydraulic motor 1, and the other hydraulic oil in the B oil circuit 81 enters the shuttle valve 71 from the second inlet P2 of the shuttle valve 71, and then enters the rod chamber of the oil cylinder 2 from the outlet A1 of the shuttle valve 71, pushing the piston of the oil cylinder 2 to move rightward, overcoming the spring force of the rodless chamber, and putting the hydraulic motor 1 in a non-braking state; and the hydraulic oil entering the hydraulic motor 1 is discharged from the A port of the hydraulic motor 1, realizing the reverse rotation of the hydraulic motor 1, so that the goods hoisted by the hydraulic winch rise.

[0030] In this embodiment, the pressure reducing valve 5 is disposed between the outlet of the shuttle valve 71 and the rod chamber of the oil cylinder 2, that is, the outlet of the shuttle valve 71 is connected to the rod chamber of the oil cylinder 2 through the pressure reducing valve 5. Since the oil pressure driving the hydraulic motor 1 is greater than the oil pressure driving the piston of the oil cylinder 2 to move rightward, illustratively, in this embodiment, the oil pressure driving the piston of the oil cylinder 2 to move rightward is 3 MPa, and the oil pressure driving the hydraulic motor 1 is 8 MPa, so the pressure of the hydraulic oil entering the rod chamber of the oil cylinder 2 from the A oil circuit 8 or the B oil circuit 81 can be reduced through the pressure reducing valve 5, saving the hydraulic oil entering the rod chamber of the oil cylinder 2, and achieving the effect of energy saving.

[0031] Of course, the oil drain port of the pressure reducing valve 5 is communicated with the oil tank 9 .

[0032] In this embodiment, the main control valve 4 is a reversing valve, and the main control valve 4 includes a valve port A, a valve port B, an oil inlet P, and an oil return port T. The oil inlet P is used to feed oil into the main control valve 4, that is, the hydraulic oil enters the main control valve 4 from the oil inlet P. Among them, the valve port A is connected to the A oil circuit 8, and the valve port B is connected to the B oil circuit 81. It can be seen that by setting the main control valve 4, the reversal of the hydraulic oil entering the A oil circuit 8 or the B oil circuit 81 can be achieved, which is conducive to improving the convenience of the hydraulic winch emergency release control system of the utility model.

[0033] Of course, the oil return port T is communicated with the oil tank 9 .

[0034] In this embodiment, the manual hydraulic pump 6 is connected to the rod chamber of the oil cylinder 2 through the pipeline connected to the rod chamber of the oil cylinder 2 by the pressure reducing valve 5, so that the pipeline connecting the manual hydraulic pump 6 and the rod chamber of the oil cylinder 2 can be reduced, saving costs. In addition, in order to make the manual hydraulic pump 6 have back pressure during use, a throttling unit 60 is also provided on the oil outlet pipeline of the manual hydraulic pump 6. The throttling unit 60 of this embodiment uses the throttling valve 3. In other embodiments, the throttling unit 60 can also be configured as a throttling hole, which is not limited here.

[0035] In this embodiment, in order to detect the oil pressure in the oil outlet pipeline of the manual hydraulic pump 6, a pressure gauge 61 is further provided on the oil outlet pipeline of the manual hydraulic pump 6, and the oil pressure in the oil outlet pipeline of the manual hydraulic pump 6 is detected by the pressure gauge 61. In addition, a one-way valve is also provided on the oil outlet pipeline of the manual hydraulic pump 6 to prevent the hydraulic oil in the pipeline connecting the pressure reducing valve 5 and the rod chamber of the oil cylinder 2 from flowing back to the manual hydraulic pump 6.

[0036] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A hydraulic winch emergency release control system, comprising a hydraulic motor and an oil cylinder for controlling the hydraulic motor to brake, wherein the A port and the B port of the hydraulic motor are connected to the A oil circuit and the B oil circuit respectively, and the A oil circuit is also connected to the rod chamber of the oil cylinder; characterized in that: The hydraulic winch emergency release control system also includes a manual hydraulic pump and a throttle valve, the two ports of the throttle valve are respectively connected to the A oil circuit and the B oil circuit, the A port of the hydraulic motor, the throttle valve and the B port of the hydraulic motor can be connected in sequence to form a circulating closed loop; the A oil circuit is also provided with a balancing valve, the balancing valve is used to prevent the hydraulic oil from flowing from the node position where the throttle valve and the A oil circuit are connected to the rod chamber of the oil cylinder, and the manual hydraulic pump is connected to the rod chamber of the oil cylinder.

2. The hydraulic winch emergency release control system according to claim 1, characterized in that: It also includes a shuttle valve, a first inlet of the shuttle valve is connected to the A oil circuit, a second inlet of the shuttle valve is connected to the B oil circuit, and the A oil circuit is connected to the rod chamber of the brake cylinder through the outlet of the shuttle valve.

3. The hydraulic winch emergency release control system according to claim 2, characterized in that: It also includes a pressure reducing valve, through which the outlet of the shuttle valve is communicated with the rod chamber of the oil cylinder.

4. The hydraulic winch emergency release control system according to claim 1, characterized in that: The balancing valve is also connected to the B oil circuit and is used to balance the oil pressure of the A oil circuit and the B oil circuit.

5. The hydraulic winch emergency release control system according to claim 1, characterized in that: It also includes a main control valve, which includes a valve port A, a valve port B, an oil inlet P, and an oil return port T. The oil inlet P is used to supply oil to the main control valve, the valve port A is connected to the A oil circuit, the valve port B is connected to the B oil circuit, and the oil return port T is connected to the oil tank.

6. The hydraulic winch emergency release control system according to claim 1, characterized in that: The oil drain port of the hydraulic motor is communicated with the oil tank.

7. The hydraulic winch emergency release control system according to claim 3, characterized in that: The manual hydraulic pump is in communication with the rod chamber through a pipeline that is in communication with the rod chamber through the pressure reducing valve.

8. The hydraulic winch emergency release control system according to claim 1, characterized in that: A throttling unit is also arranged on the oil outlet pipeline of the manual hydraulic pump.

9. The hydraulic winch emergency release control system according to claim 1, characterized in that: A pressure gauge is also provided on the oil outlet pipeline of the manual hydraulic pump.

10. The hydraulic winch emergency release control system according to claim 1, characterized in that: A one-way valve is also provided on the oil outlet pipeline of the manual hydraulic pump.

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