Rope threading winch control system

Abstract

The invention discloses a stringing winch control system which comprises a main oil inlet pipeline and a main oil return pipeline which are used for outputting pressure of a power unit, a diverter valve is arranged between the main oil inlet pipeline and the main oil return pipeline, and the main oil inlet pipeline and the main oil return pipeline are connected with a first pipeline and a second pipeline respectively. The first pipeline and the second pipeline are used for being connected with a working opening of a first winch motor during operation, a first shuttle valve used for collecting pipeline pressure is arranged between the first pipeline and the second pipeline, and an outlet of the first shuttle valve is connected with a spring cavity of the flow divider valve. According to the invention, the output pressure of the power unit can be automatically adjusted, the energy loss is reduced, and the two sets of stringing winches can be simultaneously or respectively controlled so as to execute the functions of hoisting, traction, posture adjustment and the like.

Description

Technical Field

[0001] The invention relates to a winch control device, in particular to a rope threading winch control system. Background Art

[0002] The rope pulling winch is driven by a hydraulic motor, and the hydraulic system is relatively simple. For example, the utility model patent with publication number CN 202492315 U discloses a rope pulling winch control system and a crane, and the invention patent application with publication number CN 103693562 A discloses a control method, device, system and rope pulling device for a crane rope pulling winch; among them, the scheme disclosed in CN 103693562A is as follows Figure 1 As shown, the overflow valve 16' is arranged at the oil outlet of the reversing valve 15', the two oil inlets of the switch control valve 17' are respectively connected to the oil inlet and the oil outlet of the motor 12', and the pressure sensor 13' is arranged at the oil outlet of the switch control valve 17'. Assuming that the opening m1b is used in the rope-collecting working circuit, when the oil outlet pressure from the opening m1b is higher than the pressure required by the load, the oil is unloaded from the overflow valve 16', then enters the oil inlet of the motor 12', and then returns the oil to the oil cylinder from the oil outlet of the motor 12'; when the actual working pressure does not match the required working pressure, according to the signal fed back by the sensor 13', the opening amount of the opening m1b of the proportional reversing valve 11' or the variable pump 14' is adjusted, so that the overflow valve 16' does not consume power during normal operation, prolongs the working life of the overflow valve, and improves the service life of the rope-threading winch. In the current scheme, the control of the overflow valve 16' requires a certain degree of coordination, which is relatively complex and cannot achieve real-time control. In addition, the existing rope-threading winch has a single function and has almost no other function except assisting in the installation of the wire rope. It is used less frequently, resulting in a waste of resources and costs. How to effectively utilize the rope-threading winch is also a problem that needs to be solved. Summary of the invention

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

[0004] Technical solution: The rope threading winch control system described in the present invention includes a main oil inlet pipeline and a main oil return pipeline for outputting the power unit pressure, a diverter valve is provided between the main oil inlet pipeline and the main oil return pipeline, the main oil inlet pipeline and the main oil return pipeline are respectively connected to a first pipeline and a second 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, and the outlet of the first shuttle valve is connected to the spring chamber of the diverter valve.

[0005] Preferably, the main oil inlet pipeline and the main oil return pipeline are also connected to a third pipeline and a fourth pipeline respectively. 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 chamber of the third shuttle valve and the diverter valve.

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

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

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

[0009] Preferably, a first overflow valve is respectively provided between the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the main oil return pipeline, and the first overflow 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 a spring chamber of the second overflow valve is connected to the main oil return pipeline via a solenoid valve.

[0011] Preferably, the solenoid valve has a first position for unidirectional conduction and a second position for bidirectional conduction, and the first position controls the unidirectional conduction of the main oil return pipeline to the spring chamber of the second overflow valve.

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

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

[0014] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: 1. Automatically adjust the output pressure of the power unit and reduce energy loss; 2. Enrich the rope-threading winch function and improve utilization rate: Add a set of rope-threading winch, and when hoisting large objects, connect the rope-threading winch wire rope to the sling or the object. Through the simultaneous action of the double winches, the object fixing points are increased during the hoisting process, making the object hoisting process smoother and safer; 3. When installing and docking large objects, connect the rope-threading winch wire rope to the sling or the object. Through the separate action of the rope-threading winch, the object posture can be adjusted, making the installation process more accurate and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a control principle diagram of the rope pulling winch in the prior art;

[0016] Figure 2 It is a schematic diagram of the control system of the rope-threading winch of the present invention;

[0017] Figure 3 It is the principle diagram of the rope threading and hoisting system of the present invention. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0019] Example 1: Figure 2 , Figure 3 As shown, the present invention discloses a rope threading and hoisting control system, which is mainly composed of a main oil inlet pipeline V, a main oil return pipeline VI, a first pipeline I, and a second pipeline II. The main oil inlet pipeline V, the main oil return pipeline VI are connected to the P and T ports of the power unit, a diverter valve 4 is arranged between the main oil inlet pipeline V and the main oil return pipeline VI, the main oil inlet pipeline and the main oil return pipeline are respectively connected to the first pipeline and the second pipeline, the first pipeline I and the second pipeline II are respectively connected to the two working ports A1 and B1 of the first hoisting motor 26.1, a shuttle valve 6 is arranged between the first pipeline I and the second pipeline II, and the outlet of the shuttle valve 6 is connected to the spring chamber of the diverter valve 4.

[0020] The working principle of this control system is as follows: the 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 the diverter valve 4. The diverter valve 4 acts as an unloading valve, and its valve core end pressure is consistent with the pressure of the main oil inlet pipeline V. When the pressure difference between the spring chamber and the valve core end of the diverter valve 4 is kept constant (usually 2.0-2.5MPa), the main oil inlet pipeline V supplies oil to the first winch motor 26.1. If the pressure at the P port is too large, the pressure at the P port drives the valve core of the diverter valve 4 to open, and the excess pressure oil returns to the power unit from the diverter valve 4. Compared with the overflow valve, the diverter valve 4 has a small pressure and a large pipe diameter, which can reduce flow loss and energy consumption.

[0021] A reversing valve 2 is provided on the first pipeline I and the second pipeline II. The reversing valve 2 controls the oil inlet direction of the first hoisting motor 26.1, that is, controls the rope collection and release. A one-way valve 15 is provided between the second pipeline II and the main oil return pipeline VI. The one-way valve 15 prevents air suction. A relief valve 10 and a relief valve 11 are provided between the first pipeline I and the main oil return pipeline VI and between the second pipeline II and the main oil return pipeline VI, respectively. The end of the reversing valve 2 that outputs the pressure oil is the rear end. The relief valve 10 and the relief valve 11 are located at the rear end of the reversing valve 2.

[0022] Embodiment 2: Based on Embodiment 1, this embodiment can also be modified as follows: two groups of hoisting motors are controlled to act synchronously or one hoisting motor is controlled to act separately, specifically:

[0023] The main oil inlet pipeline V and the main oil return pipeline VI are also connected to the third pipeline and the fourth pipeline. The third pipeline III and the fourth pipeline IV are connected to the working ports A2 and B2 of the second hoisting motor 26.2. The third pipeline III and the fourth pipeline IV are provided with a reversing valve 3, which is used to control the oil inlet direction of the second hoisting motor 26.2 and control the rope collection and release. A shuttle valve 8 is provided between the fourth pipeline IV; in this embodiment, the shuttle valve 6 and the shuttle valve 8 are connected through the spring chamber of the shuttle valve 1 and the diverter valve 4. When the action is executed, the shuttle valves 6 and 8 collect the pressure entering the first hoisting motor 26.1 and the second hoisting motor 26.2, and feed it back to the spring chamber of the diverter valve 4. The rest of the principles are the same as those of the embodiment 1.

[0024] The first pipeline I and the third pipeline III are respectively provided with pressure compensation valves 5 and 7, which are used to adjust the flow of each joint valve to ensure the same flow and synchronous operation when the two sets of rope threading and hoisting complex actions; the pressure compensation valves 5 and 7 can be located at the front end of the reversing valve 2 and the reversing valve 3, or at the rear end of the reversing valve 2 and the reversing valve 3, and the rear end is preferred to improve the control accuracy. At this time, the shuttle valves 6 and 8 have two outlets, which are respectively recorded as the first outlet and the second outlet. The first outlet of the shuttle valves 6 and 8 is used to connect to the working port of the shuttle valve 1, the second outlet of the shuttle valve 6 is connected to the spring chamber of the pressure compensation valve 5, and the second outlet of the shuttle valve 8 is connected to the spring chamber of the pressure compensation valve 7. When in action, the shuttle valve 1 collects the pressure of the four pipelines and feeds it back to the diverter valve 4.

[0025] A relief valve 14 is provided between the main oil inlet pipeline V and the main oil return pipeline VI. The spring chamber of the relief valve 14 is connected to the main oil return pipeline VI through the solenoid valve 9. The system pressure and safety are controlled by the relief valve 14. Specifically, when the power unit is just started, the pressure may be too high, which is higher than the relief pressure of the relief valve 14 (usually > 20MPa). At this time, the pressure oil at the P port is returned to the T port 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 main oil return pipeline VI to be unidirectional to the spring chamber of the solenoid valve 9.

[0026] There is a relief valve 12 between the third pipeline III and the main oil return pipeline VI, and a relief valve 13 between the fourth pipeline IV and the main oil return pipeline VI. When actuated, the excess pressure oil in the system is returned to the T port of the power unit. The relief valve 12 and the relief valve 13 are located at the rear end of the reversing valve 3. A one-way valve 15 is provided between the fourth pipeline IV and the main oil return pipeline VI to prevent air suction.

[0027] A floating valve 23.1 and a floating valve 23.2 are provided 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 there is no action, the solenoid valve 9 is not energized and is in a two-way position. The main oil inlet pipeline V returns oil without pressure, reducing energy loss. When there is an action, the solenoid valve 9 is energized and is in a one-way position. The main oil inlet pipeline V builds up pressure to realize the winch action; when the two winches are retracting the rope at the same time, the flow distribution of the two circuits is adjusted by the pressure compensators 5 and 7 to ensure the synchronization of the two winches; different currents are given to the solenoid reversing valves 2 and 3, and the two winches can also retract the rope at their respective speeds. When the two winches are releasing the rope at the same time, the rope can be released actively, and the control logic similar to that when the rope is collected can be realized to realize synchronous and asynchronous rope release. In addition, the floating valves 23.1 and 23.2 can also be controlled to be energized, the motor is in a floating state, and the rope threading winch passively releases the rope under the action of external force to meet the following working conditions.

Claims

1. A rope-threading winch control system, comprising a main oil inlet pipeline and a main oil return pipeline for outputting the pressure of a power unit, characterized in that: A diverter valve (4) is provided between the main oil inlet pipeline and the main oil return pipeline. The main oil inlet pipeline and the main oil return pipeline are respectively connected to a first pipeline and a second pipeline. The first pipeline and the second pipeline are used to connect to the working port of the first hoisting 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 chamber of the diverter valve (4).

2. The rope-threading winch control system according to claim 1, characterized in that: The main oil inlet pipeline and the main oil return pipeline are also connected to a third pipeline and a fourth pipeline respectively. The third pipeline and the fourth pipeline are used to connect to the working port of the second hoisting motor (26.1) 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 via the third shuttle valve (1) and the spring chamber of the diverter valve (4).

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

4. The rope-threading winch control system according to claim 3, characterized in that: The first pipeline and the third pipeline are respectively provided with pressure compensating valves, the first shuttle valve (6) and the second shuttle valve (8) respectively have second outlets, the second outlet of the first shuttle valve (6) is connected to the spring chamber of the pressure compensating valve located in the first pipeline, and the outlet of the second shuttle valve (8) is connected to the spring chamber of the pressure compensating 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 overflow valve is respectively arranged between the first pipeline, the second pipeline, the third pipeline, the fourth pipeline and the main oil return pipeline, and the first overflow 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, and a spring chamber of the second overflow valve (14) is connected to the main oil return pipeline via 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, and the first position controls the unidirectional conduction of the main oil return pipeline to the spring chamber of the second overflow valve (14).

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

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

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