Rope threading winch control system

Abstract

The application discloses a kind of rope penetrating hoist control systems, including for output power unit pressure main oil inlet pipeline, main oil return pipeline, the shunt valve is equipped between the main oil inlet pipeline and main oil return pipeline, the first pipeline, second pipeline are respectively connected on the main oil inlet pipeline, main oil return pipeline, and first pipeline, second pipeline are used to connect the working port of first hoist motor during operation, the first shuttle valve for collecting pipeline pressure is equipped between the first pipeline, second pipeline, and the outlet of the first shuttle valve is connected with the spring cavity of shunt valve.The application can automatically adjust power unit output pressure, reduce energy loss, can control or control two sets of rope penetrating hoist respectively to perform hoisting, traction, posture adjustment and other functions.

Description

Technical Field

[0001] This invention relates to a winch control device, and more particularly to a rope-threaded winch control system. Background Technology

[0002] The rope-threading winch is driven by a hydraulic motor, and the hydraulic system is relatively simple. For example, utility model patent CN 202492315 U discloses a rope-threading winch control system and crane, and invention patent application CN 103693562 A discloses a crane rope-threading winch control method, device, system, and rope-threading equipment. The solution disclosed in CN 103693562A is as follows: Figure 1 As shown, the overflow valve 16' is located at the outlet of the directional valve 15'. The two inlets of the switch control valve 17' are connected to the inlet and outlet of the motor 12', respectively. The pressure sensor 13' is located at the outlet of the switch control valve 17'. Assuming that the opening m1b is used in the rope winding circuit, when the oil pressure at the outlet m1b is higher than the required load pressure, the load is unloaded from the overflow valve 16', then enters the inlet of the motor 12', and then returns to the cylinder from the outlet of the motor 12'. When the actual working pressure does not match the required working pressure, the opening of the proportional directional valve 11' at the outlet m1b or the variable pump 14' is adjusted according to the signal fed back by the sensor 13', so that the overflow valve 16' does not consume power during normal operation, extending the working life of the overflow valve and improving the service life of the rope winding winch. In the current scheme, the control of the overflow valve 16' requires a specific degree of coordination, which is relatively complex and cannot achieve real-time control. In addition, the existing rope winches have a single function, and apart from assisting in the installation of steel wire ropes, they have almost no other function. They are used infrequently, resulting in a waste of resources and costs. How to effectively utilize rope winches is also a problem that needs to be solved. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide a rope winch control system that can automatically adjust the output pressure of the power unit.

[0004] Technical solution: The rope-threading winch control system of the present invention includes a main oil inlet pipeline and a main oil return pipeline for outputting power unit pressure. A flow divider valve is provided between the main oil inlet pipeline and the main oil return pipeline. A first pipeline and a second pipeline are respectively connected to the main oil inlet pipeline and the main oil return pipeline. The first pipeline and the second pipeline are used to connect to the working port of the first winch motor during operation. A first shuttle valve for collecting pipeline pressure is provided between the first pipeline and the second pipeline. The outlet of the first shuttle valve is connected to the spring cavity of the flow divider valve.

[0005] Preferably, the main oil inlet pipeline and the main oil return pipeline are respectively connected to a third pipeline and a fourth pipeline. The third pipeline and the fourth pipeline are used to connect to the working port of the second winch motor during operation. A second shuttle valve for collecting pipeline pressure is provided between the third pipeline and the fourth pipeline. The outlets of the first shuttle valve and the second shuttle valve are connected through the spring cavity of the third shuttle valve and the diverter valve.

[0006] Preferably, the first and second pipelines, the third pipeline and the fourth pipeline are respectively provided with directional valves for controlling the oil inlet direction of the first winch motor and the second winch motor.

[0007] Preferably, pressure compensation valves are provided on the first pipeline and the third pipeline respectively, the first shuttle valve and the second shuttle valve respectively have a second outlet, the second outlet of the first shuttle valve is connected to the spring cavity of the pressure compensation valve located in the first pipeline, and the outlet of the second shuttle valve is connected to the spring cavity of the pressure compensation valve located in the third pipeline.

[0008] Preferably, the pressure compensation valve is located at the rear end of the directional valve.

[0009] Preferably, a first relief valve is provided between the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the main return oil pipeline, and the first relief valve is located at the rear end of the reversing valve.

[0010] Preferably, a second overflow valve is provided between the main oil inlet pipeline and the main oil return pipeline, and the spring chamber of the second overflow valve is connected to the main oil return pipeline through a solenoid valve.

[0011] Preferably, the solenoid valve has a first position for unidirectional conduction and a second position for bidirectional conduction, wherein the first position controls the main return oil line to conduct unidirectionally to the spring chamber of the second relief valve.

[0012] Preferably, a one-way valve for preventing air suction is provided between the second pipeline, the fourth pipeline and the main return oil pipeline.

[0013] Preferably, a floating valve is provided between the first and second pipelines, and between the third and fourth pipelines.

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. Automatically adjusts the output pressure of the power unit and reduces energy loss; 2. Enriches the rope winch function and improves utilization: Adding one set of rope winches, when hoisting large objects, the rope winch wire rope is connected to the lifting device or object. Through the simultaneous action of the two winches, the number of fixed points of the object during the hoisting process is increased, making the object hoisting process more stable and safer; 3. When installing and docking large objects, the rope winch wire rope is connected to the lifting device or object. Through the individual action of the rope winch, the posture of the object can be adjusted, making the installation process more precise and efficient. Attached Figure Description

[0015] Figure 1 This is a control principle diagram of a rope-driven winch in existing technology.

[0016] Figure 2 This is a schematic diagram of the control system for the rope-threading winch of the present invention.

[0017] Figure 3 This is a schematic diagram of the rope-threading winch system of the present invention. Detailed Implementation

[0018] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0019] Example 1: As Figure 2 , Figure 3 As shown, this invention discloses a rope-threading winch control system, which mainly consists of a main oil inlet pipe V, a main oil return pipe VI, a first pipe I, and a second pipe II. The main oil inlet pipe V and the main oil return pipe VI are connected to the P and T ports of the power unit. A diversion valve 4 is provided between the main oil inlet pipe V and the main oil return pipe VI. The first pipe and the second pipe are respectively connected to the main oil inlet pipe and the main oil return pipe. The first pipe I and the second pipe II are respectively connected to the two working ports A1 and B1 of the first winch motor 26.1. A shuttle valve 6 is provided between the first pipe I and the second pipe II. The outlet of the shuttle valve 6 is connected to the spring cavity of the diversion valve 4.

[0020] The working principle of this control system is as follows: Shuttle valve 6 collects the pressure entering the first pipeline I and the second pipeline II, and feeds it back to the spring chamber of diverter valve 4. Diverter valve 4 acts as an unloading valve, and the pressure at the valve core end is consistent with the pressure in the main oil inlet pipeline V. When the pressure difference between the spring chamber and the valve core end of diverter valve 4 is kept constant (usually 2.0~2.5MPa), the main oil inlet pipeline V supplies oil to the first hoist motor 26.1. If the pressure at port P is too high, the pressure at port P drives the valve core of diverter valve 4 to open, and the excess pressurized oil returns to the power unit through diverter valve 4. Compared with the relief valve, diverter valve 4 has a lower pressure and a larger pipe diameter, which can reduce flow loss and energy consumption.

[0021] A reversing valve 2 is installed on the first pipeline I and the second pipeline II. The reversing valve 2 controls the oil inlet direction of the first hoist motor 26.1, that is, controls the winding and unwinding of the rope. A one-way valve 15 is installed between the second pipeline II and the main return oil pipeline VI to prevent cavitation. An overflow valve 10 and an overflow valve 11 are respectively installed between the first pipeline I and the main return oil pipeline VI, and between the second pipeline II and the main return oil pipeline VI. With the end of the reversing valve 2 that outputs pressure oil as the rear end, the overflow valve 10 and the overflow valve 11 are located at the rear end of the reversing valve 2.

[0022] Example 2: Based on Example 1, this example can also be modified as follows: simultaneously controlling two sets of hoisting motors to operate synchronously or controlling one hoisting motor to operate individually, specifically:

[0023] The main inlet oil line V and the main return oil line VI are also connected to a third line and a fourth line. The third line III and the fourth line IV are connected to the working ports A2 and B2 of the second winch motor 26.2. A reversing valve 3 is provided on the third line III and the fourth line IV. The reversing valve 3 is used to control the oil inlet direction of the second winch motor 26.2 and control the rope winding and unwinding. A shuttle valve 8 is provided between the fourth lines IV. In this embodiment, the shuttle valves 6 and 8 are connected through the spring cavity of the shuttle valve 1 and the diverter valve 4. When the action is performed, the shuttle valves 6 and 8 collect the pressure entering the first winch motor 26.1 and the second winch motor 26.2 and feed it back to the spring cavity of the diverter valve 4. The rest of the principle is the same as in embodiment 1.

[0024] Pressure compensation valves 5 and 7 are respectively installed on the first pipeline I and the third pipeline III. Pressure compensation valves 5 and 7 are used to adjust the flow rate of each valve linkage, ensuring that the flow rate is the same and operates synchronously when the two sets of rope-threading winches are in combined operation. Pressure compensation valves 5 and 7 can be located at the front end of directional valves 2 and 3, or at the rear end, with the rear end being preferred to improve control accuracy. At this time, shuttle valves 6 and 8 have two outlets, denoted as the first outlet and the second outlet, respectively. The first outlet of shuttle valves 6 and 8 is used to connect to the working port of shuttle valve 1. The second outlet of shuttle valve 6 is connected to the spring cavity of pressure compensation valve 5, and the second outlet of shuttle valve 8 is connected to the spring cavity of pressure compensation valve 7. During operation, shuttle valve 1 collects the pressure from the four pipelines and feeds it back to the diversion valve 4.

[0025] A relief valve 14 is installed between the main inlet oil line V and the main return oil line VI. The spring chamber of the relief valve 14 is connected to the main return oil line VI through a solenoid valve 9. The system pressure and safety are controlled by the relief valve 14. Specifically, when the power unit is first started, the pressure may be too high, exceeding the relief pressure of the relief valve 14 (usually >20MPa). At this time, the pressure oil at port P returns to port T through the relief valve 14 to protect the pipeline. The solenoid valve 9 has a first position and a second position. The first position is unidirectional, and the second position is bidirectional. The second position controls the unidirectional flow of the main return oil line VI to the spring chamber of the solenoid valve 9.

[0026] A relief valve 12 is located between the third pipeline III and the main return oil pipeline VI, and a relief valve 13 is located between the fourth pipeline IV and the main return oil pipeline VI. When activated, these valves return excess pressurized oil in the system to the power unit T port. Relief valves 12 and 13 are located at the rear end of the directional valve 3. A check valve 15 is installed between the fourth pipeline IV and the main return oil pipeline VI to prevent cavitation.

[0027] Floating valves 23.1 and 23.2 are installed between the first pipeline I and the second pipeline II, and between the third pipeline III and the fourth pipeline IV.

[0028] like Figure 3 When not in operation, solenoid valve 9 is de-energized and in the bidirectional position, resulting in no pressure return oil in the main oil inlet line V, reducing energy loss. When in operation, solenoid valve 9 is energized and in the unidirectional position, establishing pressure in the main oil inlet line V to achieve winch operation. When both winches are simultaneously winding up the rope, the flow distribution of the two circuits is adjusted by pressure compensators 5 and 7 to ensure synchronization of the two winches. Applying different currents to solenoid directional valves 2 and 3 can also allow the two winches to wind up the rope at their respective speeds. When both winches are simultaneously releasing the rope, they can actively release the rope, using similar control logic to winding up the rope, achieving synchronous and asynchronous rope release. In addition, floating valves 23.1 and 23.2 can be energized, putting the motor in a floating state, and the rope-threading winch passively releases the rope under external force to meet following conditions.

Claims

1. A rope-threaded winch control system, comprising a main oil inlet pipeline and a main oil return pipeline for outputting power unit pressure, characterized in that, A diversion valve (4) is provided between the main oil inlet pipeline and the main oil return pipeline. A first pipeline and a second pipeline are respectively connected to the main oil inlet pipeline and the main oil return pipeline. The first pipeline and the second pipeline are used to connect to the working port of the first winch motor (26.1) during operation. A first shuttle valve (6) for collecting pipeline pressure is provided between the first pipeline and the second pipeline. The outlet of the first shuttle valve (6) is connected to the spring cavity of the diversion valve (4).

2. The rope-threading winch control system according to claim 1, characterized in that, The main inlet oil pipeline and the main return oil pipeline are respectively connected to a third pipeline and a fourth pipeline. The third pipeline and the fourth pipeline are used to connect to the working port of the second winch motor (26.2) during operation. A second shuttle valve (8) for collecting pipeline pressure is provided between the third pipeline and the fourth pipeline. The outlets of the first shuttle valve (6) and the second shuttle valve (8) are connected through the spring cavity of the third shuttle valve (1) and the diverter valve (4).

3. The rope-threading winch control system according to claim 2, characterized in that, The first and second pipelines, the third pipeline and the fourth pipeline are respectively equipped with directional valves for controlling the oil inlet direction of the first winch motor (26.1) and the second winch motor (26.2).

4. The rope-threading winch control system according to claim 3, characterized in that, Pressure compensation valves are provided on the first pipeline and the third pipeline respectively. The first shuttle valve (6) and the second shuttle valve (8) have second outlets respectively. The second outlet of the first shuttle valve (6) is connected to the spring cavity of the pressure compensation valve located in the first pipeline, and the outlet of the second shuttle valve (8) is connected to the spring cavity of the pressure compensation valve located in the third pipeline.

5. The rope-threading winch control system according to claim 4, characterized in that, The pressure compensation valve is located at the rear end of the reversing valve.

6. The rope-threading winch control system according to claim 2, characterized in that, A first relief valve is provided between the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the main return oil pipeline, and the first relief valve is located at the rear end of the reversing valve.

7. The rope-threading winch control system according to claim 1, characterized in that, A second overflow valve (14) is provided between the main oil inlet pipeline and the main oil return pipeline. The spring chamber of the second overflow valve (14) is connected to the main oil return pipeline through a solenoid valve (9).

8. The rope-threading winch control system according to claim 7, characterized in that, The solenoid valve (9) has a first position for unidirectional conduction and a second position for bidirectional conduction. The first position controls the main return oil line to conduct unidirectionally to the spring chamber of the second relief valve (14).

9. The rope-threading winch control system according to claim 2, characterized in that, A check valve (15) for preventing air suction is provided between the second pipeline, the fourth pipeline and the main return oil pipeline.

10. The rope-threading winch control system according to claim 2, characterized in that, A floating valve is provided between the first and second pipelines, and between the third and fourth pipelines.

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