A control method for a stabilizing rope winch

Abstract

The present invention provides a control method for a stabilizing winch, which is realized by controlling a hydraulic system through a winch, and the specific steps include: (1) a crane lifts a weight, and a stabilizing cable is connected to the weight; (2) the stabilizing winch tightens the stabilizing cable; (3) when the crane stops lifting or lowering the weight; (4) the P end and the A end of the electromagnetic reversing valve are connected; (5) the P end of the reversing valve is connected to the T end; (6) a backup pressure is given to the oil inlet pipeline through the overflow valve and the electric proportional overflow valve; (7) when the oil pressure of the motor is less than the preset pressure of the overflow valve, the pressure of the hydraulic oil cannot open the overflow valve; (8) the hydraulic oil in the motor cannot flow back to the oil tank through the overflow valve, and the motor stops stably; (9) when the oil pressure of the motor is greater than the preset pressure of the overflow valve, the overflow valve opens; (10) the motor reverses; (11) the overflow valve gives the hydraulic oil backup pressure through the preset pressure, so that the motor can slowly reverse and lower the weight.

Description

Technical Field

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

[0002] To improve the safety of cranes when lifting heavy objects, a stabilizing winch is usually installed on the crane when lifting heavy objects of excessive tonnage. The wire rope of the stabilizing winch is connected to the weight. Most existing stabilizing mechanisms use a fixed pulley as a fulcrum on the crane's boom to maintain constant tension in the wire rope of the stabilizing winch, thereby increasing stability. In this arrangement, when the crane is lifting a heavy object, the wire rope of the stabilizing winch is pulled by the weight and becomes loose. The stabilizing winch controls the wire rope to maintain constant tension by retracting and extending the wire rope. The wire rope of the stabilizing winch then applies a certain balancing force to the weight, thereby reducing the weight's sway.

[0003] Among the existing constant tension hydraulic systems, such as the patent document with Chinese patent application number 202311410977.6 and publication date of 2024.01.09, a constant tension hydraulic system for a towing winch is disclosed, including an oil circuit control execution system, a hydraulic pump, and an oil tank. The oil circuit control execution system includes a multi-way valve, a towing winch, and a constant tension control system for controlling the towing winch. One end of the multi-way valve is connected to the oil tank through a hydraulic pump, and the other end of the multi-way valve is connected to the constant tension control system, which is connected to the winch. The constant tension control system includes a constant tension control oil circuit, which includes a balancing valve, a two-way valve, a second solenoid valve, a first damping valve, and a proportional overflow. Utilizing the hydraulic system of this invention, a constant tension can be given to the towing winch.

[0004] The constant tension system of this document only provides a constant tension to the winch, but if the winch requires a heavy object to descend slowly, it does not prevent the cable from suddenly and rapidly descending. Summary of the Invention

[0005] The present invention provides a control method for a stabilizing rope winch. When a heavy object drives a motor to reverse due to its weight, the oil pressure of the motor increases. When the oil pressure of the motor is greater than a set oil pressure value, the oil circuit can be controlled to open, so that the heavy object can slowly descend, protecting the crane from being forcibly pulled by the heavy object and damaging the crane structure.

[0006] To achieve the above object, the technical solution of the present invention is: a control method for a stabilizing winch, which is implemented by controlling a hydraulic system of the winch, and the specific steps include:

[0007] (1) The crane lifts the load and the stabilizing cable is connected to the load.

[0008] (2) The oil pump pumps oil, and the hydraulic oil flows into the motor through the oil inlet pipe and flows back to the oil tank through the oil return pipe to realize circulation, thereby driving the motor to rotate and driving the stabilizing rope winch to tighten the stabilizing rope.

[0009] (3) When the crane stops lifting or lowering heavy objects.

[0010] (4) The electromagnetic reversing valve starts and reverses, connecting the P end and the A end of the electromagnetic reversing valve.

[0011] (5) The hydraulic oil in the oil inlet pipeline flows to the control end of the reversing valve through the electromagnetic reversing valve, driving the reversing valve to reverse, so that the P end and the T end of the reversing valve are connected.

[0012] (6) The hydraulic oil flowing to the relief valve can flow to the electric proportional relief valve through the reversing valve and flow back to the oil tank; a backup pressure is given to the oil inlet pipeline through the relief valve and the electric proportional relief valve.

[0013] (7) When the motor oil pressure is lower than the preset pressure of the relief valve, the pressure of the hydraulic oil cannot open the relief valve.

[0014] (8) The hydraulic oil in the motor cannot flow back to the oil tank through the overflow valve, and the motor stops moving steadily.

[0015] (9) When the oil pressure of the motor is greater than the preset pressure of the relief valve, the relief valve opens.

[0016] (10) The motor reverses and the hydraulic oil is supplied from the oil outlet pipe to the motor and flows into the oil inlet pipe, and finally flows back to the oil tank from the overflow valve.

[0017] (11) The overflow valve provides backup pressure to the hydraulic oil through a preset pressure, allowing the motor to slowly reverse and lower the heavy object.

[0018] The winch control hydraulic system includes a control valve assembly, a motor and an oil tank. The return oil end of the motor is connected to the oil tank through an oil return pipe, and the oil inlet end of the motor is connected to the oil tank through an oil inlet pipe. An oil pump is provided on the oil inlet pipe. A control valve assembly is provided between the oil inlet end of the motor and the oil tank. The motor drives the stabilizing rope winch to retract and extend the stabilizing rope cable.

[0019] The control valve assembly includes a relief valve and a reversing valve. The P end of the relief valve is connected to the oil inlet pipeline close to the oil inlet end of the motor, the T end of the relief valve is connected to the oil return pipeline, the control end of the relief valve is connected to the P end of the reversing valve, the T end of the reversing valve is connected to the oil tank, and the control end of the relief valve is also connected to the oil inlet pipeline.

[0020] The control valve assembly also includes an electromagnetic reversing valve and an electric proportional relief valve, wherein the P end of the electromagnetic reversing valve is connected to the oil inlet pipe, the T end of the electromagnetic reversing valve is connected to the oil tank, the A end of the electromagnetic reversing valve is connected to the control end of the reversing valve, an electric proportional relief valve is provided between the T end of the reversing valve and the oil tank, the A end of the electric proportional relief valve is connected to the T end of the reversing valve, and the B end of the electric proportional relief valve is connected to the oil tank;

[0021] A balancing valve group is also provided on the oil inlet pipeline, which includes a balancing overflow valve and a one-way valve. The oil inlet end of the balancing overflow valve is connected to the oil inlet pipeline close to the oil inlet end of the motor, and the oil outlet end of the balancing overflow valve is connected to the oil inlet pipeline close to the oil tank. The oil inlet end of the one-way valve is connected to the oil inlet pipeline of the balancing overflow valve close to the oil tank, and the oil outlet end of the one-way valve is connected to the oil inlet pipeline close to the oil inlet end of the motor.

[0022] When the hydraulic oil in the oil tank is in the oil-inlet pipe, it flows into the motor from the oil inlet end of the motor and flows back to the oil tank from the oil return end of the motor to realize circulation, thereby driving the motor to rotate and driving the stabilizing rope winch to tighten the stabilizing rope cable, so that there is a certain constant tension between the stabilizing rope cable and the weight, thereby pulling the weight, making it less likely to shake. At the same time, the hydraulic oil flowing to the motor flows through the oil inlet pipe to the control end of the overflow valve to close the overflow valve, and when the crane stops lifting or lowering the weight, the electromagnetic reversing valve is controlled to start and reverse, thereby connecting the P end and the A end of the electromagnetic reversing valve, so that the hydraulic oil in the oil inlet pipe flows to the control end of the reversing valve through the electromagnetic reversing valve, thereby driving the reversing valve to reverse. The P end of the reversing valve is connected to the T end, so that the hydraulic oil flowing to the overflow valve can flow through the reversing valve to the electric proportional overflow valve and return to the oil tank, thereby giving the oil inlet pipe a backup pressure through the overflow valve and the electric proportional overflow valve. As a result, when the oil pressure of the motor is less than the preset pressure of the overflow valve, the pressure of the hydraulic oil cannot open the overflow valve, and the hydraulic oil in the motor cannot flow back to the oil tank through the overflow valve, so that the motor can stop stably. When the oil pressure of the motor is greater than the preset pressure of the overflow valve, the overflow valve opens, and the motor reverses, so that the hydraulic oil is supplied to the motor from the oil outlet pipe and flows into the oil inlet pipe, and finally flows back to the oil tank from the overflow valve. At this time, the overflow valve gives the hydraulic oil backup pressure through the preset pressure, so that the motor can slowly reverse and lower the weight, thereby preventing the stabilizing cable from suddenly and quickly falling and damaging the structure of the crane or the weight.

[0023] Furthermore, the P end of the electromagnetic reversing valve is connected to the oil inlet pipeline through a pressure reducing valve, the oil inlet end of the pressure reducing valve is connected to the oil inlet pipeline and the oil outlet pipeline through a shuttle valve, and the oil outlet end of the pressure reducing valve is connected to the P end of the electromagnetic reversing valve.

[0024] The above arrangement, through the arrangement of the pressure reducing valve, ensures that the pressure of the hydraulic oil flowing into the control end of the reversing valve through the electromagnetic reversing valve will not be too high, thereby preventing damage to the reversing valve.

[0025] Furthermore, the first port of the shuttle valve is connected to the oil inlet pipeline, the second port of the shuttle valve is connected to the oil outlet pipeline, and the third port of the shuttle valve is connected to the oil inlet pipeline of the pressure reducing valve.

[0026] The above arrangement enables the shuttle valve to change the pipeline through which the hydraulic oil flows into the electromagnetic reversing valve as required.

[0027] Furthermore, a brake valve is provided on the motor, and the brake valve is released or closed to drive the motor to rotate.

[0028] The above arrangement, by providing a brake valve, ensures that the motor cannot rotate when not working. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the hydraulic system of the present invention.

[0030] Figure 2 It is the workflow diagram of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] like Figure 1 As shown, a winch control hydraulic system includes a control valve assembly, a motor 1 and an oil tank 2. The return oil end of the motor 1 is connected to the oil tank 2 through an oil return pipe 12, and the oil inlet end of the motor 1 is connected to the oil tank through an oil inlet pipe 11. An oil pump (not shown in the figure) is provided on the oil inlet pipe 11. A control valve assembly is provided between the oil inlet end of the motor 1 and the oil tank 2. The motor 1 drives the stabilizing rope winch 10 to retract and release the stabilizing rope cable (not shown in the figure).

[0033] The control valve assembly includes a relief valve 31 and a reversing valve 32. The P end of the relief valve 31 is connected to the oil inlet pipeline 11 close to the oil inlet end of the motor 1, and the T end of the relief valve 31 is connected to the oil return pipeline 12. The control end X of the relief valve 31 is connected to the P end of the reversing valve 32, and the T end of the reversing valve 32 is connected to the oil tank 2. The control end X of the relief valve 31 is also connected to the oil inlet pipeline 11.

[0034] The control valve assembly also includes an electromagnetic reversing valve 33 and an electric proportional relief valve 34. The P end of the electromagnetic reversing valve 33 is connected to the oil inlet pipe 11, the T end of the electromagnetic reversing valve 33 is connected to the oil tank 2, and the A end of the electromagnetic reversing valve 33 is connected to the control end K of the reversing valve 32. An electric proportional relief valve 34 is provided between the T end of the reversing valve 32 and the oil tank 2. The A end of the electric proportional relief valve 34 is connected to the T end of the reversing valve 32, and the B end of the electric proportional relief valve 34 is connected to the oil tank 2.

[0035] The P end of the solenoid reversing valve 33 is connected to the oil inlet pipeline via a pressure reducing valve 35. The oil inlet end of the pressure reducing valve 35 is connected to the oil inlet pipeline 11 and the oil outlet pipeline 12 via a shuttle valve 36. The oil outlet end of the pressure reducing valve 35 is connected to the P end of the solenoid reversing valve 33. The configuration of the pressure reducing valve 35 ensures that the hydraulic oil flowing through the solenoid reversing valve 33 and into the control end K of the reversing valve 32 does not have too high an oil pressure, thereby preventing damage to the reversing valve.

[0036] The first port 361 of the shuttle valve 36 is connected to the oil inlet pipeline 11, the second port 362 of the shuttle valve 36 is connected to the oil outlet pipeline 12, and the third port 363 of the shuttle valve 36 is connected to the oil inlet pipeline of the pressure reducing valve 35. The shuttle valve 36 allows the hydraulic oil to flow into the pipeline of the electromagnetic reversing valve 33 as needed.

[0037] A balancing valve assembly 4 is also provided on the oil inlet pipe 11. The balancing valve assembly includes a balancing relief valve 41 and a one-way valve 42. The oil inlet end of the balancing relief valve 41 is connected to the oil inlet pipe 11 near the oil inlet end of the motor 1, and the oil outlet end of the balancing relief valve 41 is connected to the oil inlet pipe 11 near the oil tank 2. The oil inlet end of the one-way valve 42 is connected to the oil inlet pipe 11 near the oil tank 2, and the oil outlet end of the one-way valve 42 is connected to the oil inlet pipe 11 near the oil inlet end of the motor 1. Through the action of the balancing valve assembly 4, the hydraulic oil can smoothly flow into the motor 1 through the oil inlet pipe 11.

[0038] The motor is also provided with a brake valve 01, which is released or closed to drive the motor 1 to rotate. In this embodiment, the brake valve is a common control valve component provided between the oil circuit and the motor. Its specific working principle is prior art and will not be described here.

[0039] like Figure 2 As shown, a control method for a stabilizing rope winch comprises the following specific steps:

[0040] (1) The crane lifts the load and the stabilizing cable is connected to the load.

[0041] (2) The oil pump pumps oil, and the hydraulic oil flows into the motor through the oil inlet pipe and flows back to the oil tank through the oil return pipe to realize circulation, thereby driving the motor to rotate and driving the stabilizing rope winch to tighten the stabilizing rope.

[0042] (3) When the crane stops lifting or lowering heavy objects.

[0043] (4) The electromagnetic reversing valve starts and reverses, connecting the P end and the A end of the electromagnetic reversing valve.

[0044] (5) The hydraulic oil in the oil inlet pipeline flows to the control end of the reversing valve through the electromagnetic reversing valve, driving the reversing valve to reverse, so that the P end and the T end of the reversing valve are connected.

[0045] (6) The hydraulic oil flowing to the relief valve can flow to the electric proportional relief valve through the reversing valve and flow back to the oil tank; a backup pressure is given to the oil inlet pipeline through the relief valve and the electric proportional relief valve.

[0046] (7) When the motor oil pressure is lower than the preset pressure of the relief valve, the pressure of the hydraulic oil cannot open the relief valve.

[0047] (8) The hydraulic oil in the motor cannot flow back to the oil tank through the overflow valve, and the motor stops moving steadily.

[0048] (9) When the oil pressure of the motor is greater than the preset pressure of the relief valve, the relief valve opens.

[0049] (10) The motor reverses and the hydraulic oil is supplied from the oil outlet pipe to the motor and flows into the oil inlet pipe, and finally flows back to the oil tank from the overflow valve.

[0050] (11) The overflow valve provides hydraulic oil with a pre-set pressure, causing the motor to slowly reverse and lower the weight.

[0051] The working principle of the present invention is: when the crane is lifting a heavy object, the stabilizing cable is connected to the heavy object, and then the oil is pumped through the oil pump. At this time, the electromagnetic reversing valve 33 is not connected with the reversing valve 32, and the hydraulic oil in the oil tank 2 flows into the motor 1 from the oil inlet end of the motor 1 through the oil inlet pipe 11 and flows back to the oil tank 2 from the oil return end of the motor 1 to realize circulation, thereby driving the motor 1 to rotate and driving the stabilizing cable winch to tighten the stabilizing cable, so that there is a certain constant tension between the stabilizing cable and the heavy object, thereby pulling the heavy object, making it less likely to shake. At the same time, the hydraulic oil flowing to the motor 1 flows through the oil inlet pipe 11 to the control end X of the relief valve 31, so that the relief valve 31 is closed. When the crane stops lifting or lowering the heavy object, the electromagnetic reversing valve 33 is controlled to start and reverse, thereby connecting the P end and the A end of the electromagnetic reversing valve 33, so that the hydraulic oil in the oil inlet pipe 11 flows to the control end K of the reversing valve 32 through the electromagnetic reversing valve 33, thereby driving the reversing valve 32 to reverse, so that the reversing The P end of the valve 32 is connected to the T end, so that the hydraulic oil flowing to the relief valve 31 can flow through the reversing valve 32 to the electric proportional relief valve 34 and flow back to the oil tank, thereby giving the oil inlet pipe 11 a backup pressure through the relief valve 31 and the electric proportional relief valve 34. As a result, when the oil pressure of the motor 1 is lower than the preset pressure of the relief valve 31, the pressure of the hydraulic oil cannot open the relief valve 31, and the hydraulic oil in the motor 1 cannot flow back to the oil tank 2 through the relief valve 31, so that the motor 1 can stop stably. When the oil pressure of the motor 1 is higher than the preset pressure of the relief valve 31, the relief valve 31 opens, and the motor 1 reverses, so that the hydraulic oil is supplied from the oil outlet pipe 12 to the motor 1 and flows into the oil inlet pipe 11, and finally flows back to the oil tank 2 from the relief valve 31. At this time, the relief valve 31 gives the hydraulic oil backup pressure through the preset pressure, so that the motor 1 can slowly reverse and lower the weight, thereby preventing the stabilizing cable from suddenly and quickly falling and damaging the crane structure or weight.

Claims

1. A method for controlling a stabilizing winch, implemented by controlling a hydraulic system of the winch, characterized in that: The specific steps include: (1) The crane lifts the load and the stabilizing cable is connected to the load; (2) The oil pump pumps oil, and the hydraulic oil flows into the motor through the oil inlet pipe and flows back to the oil tank through the oil return pipe to realize circulation, thereby driving the motor to rotate and driving the stabilizing rope winch to tighten the stabilizing rope; (3) When the crane stops lifting or lowering heavy objects; (4) The electromagnetic reversing valve starts and reverses, connecting the P end and the A end of the electromagnetic reversing valve; (5) The hydraulic oil in the oil inlet pipeline flows to the control end of the reversing valve through the electromagnetic reversing valve, driving the reversing valve to reverse, so that the P end and the T end of the reversing valve are connected; (6) The hydraulic oil flowing to the relief valve can flow to the electric proportional relief valve through the reversing valve and flow back to the oil tank; a back pressure is given to the oil inlet pipeline through the relief valve and the electric proportional relief valve; (7) When the motor oil pressure is lower than the preset pressure of the relief valve, the hydraulic oil pressure cannot open the relief valve; (8) The hydraulic oil in the motor cannot flow back to the oil tank through the overflow valve, and the motor stops moving steadily; (9) When the oil pressure of the motor is greater than the preset pressure of the relief valve, the relief valve opens; (10) The motor reverses, causing the hydraulic oil to be supplied from the oil outlet pipe to the motor and flow into the oil inlet pipe, and finally flow back to the oil tank from the overflow valve; (11) The overflow valve applies back pressure to the hydraulic oil through a preset pressure, allowing the motor to slowly reverse and lower the weight; The winch control hydraulic system includes a control valve assembly, a motor and an oil tank. The oil return end of the motor is connected to the oil tank through an oil return pipe, and the oil inlet end of the motor is connected to the oil tank through an oil inlet pipe. An oil pump is provided on the oil inlet pipe. A control valve assembly is provided between the oil inlet end of the motor and the oil tank. The motor drives the stabilizing rope winch to retract and extend the stabilizing rope cable. The control valve assembly includes a relief valve and a reversing valve, wherein the P end of the relief valve is connected to the oil inlet pipeline close to the oil inlet end of the motor, the T end of the relief valve is connected to the oil return pipeline, the control end of the relief valve is connected to the P end of the reversing valve, the T end of the reversing valve is connected to the oil tank, and the control end of the relief valve is also connected to the oil inlet pipeline; The control valve assembly also includes an electromagnetic reversing valve and an electric proportional relief valve, wherein the P end of the electromagnetic reversing valve is connected to the oil inlet pipe, the T end of the electromagnetic reversing valve is connected to the oil tank, the A end of the electromagnetic reversing valve is connected to the control end of the reversing valve, an electric proportional relief valve is provided between the T end of the reversing valve and the oil tank, the A end of the electric proportional relief valve is connected to the T end of the reversing valve, and the B end of the electric proportional relief valve is connected to the oil tank; A balancing valve group is also provided on the oil inlet pipeline, which includes a balancing overflow valve and a one-way valve. The oil inlet end of the balancing overflow valve is connected to the oil inlet pipeline close to the oil inlet end of the motor, and the oil outlet end of the balancing overflow valve is connected to the oil inlet pipeline close to the oil tank. The oil inlet end of the one-way valve is connected to the oil inlet pipeline of the balancing overflow valve close to the oil tank, and the oil outlet end of the one-way valve is connected to the oil inlet pipeline close to the oil inlet end of the motor.

2. The control method of a stabilizing rope winch according to claim 1, characterized in that: The P end of the electromagnetic reversing valve is connected to the oil inlet pipeline through a pressure reducing valve, the oil inlet end of the pressure reducing valve is connected to the oil inlet pipeline and the oil outlet pipeline through a shuttle valve, and the oil outlet end of the pressure reducing valve is connected to the P end of the electromagnetic reversing valve.

3. The control method of a stabilizing rope winch according to claim 2, characterized in that: The first port of the shuttle valve is connected to the oil inlet pipeline, the second port of the shuttle valve is connected to the oil outlet pipeline, and the third port of the shuttle valve is connected to the oil inlet pipeline of the pressure reducing valve.

4. The control method of a stabilizing rope winch according to claim 1, characterized in that: A brake valve is also provided on the motor, and the brake valve is released or closed to drive the motor to rotate.

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