A hydraulic damping and anti-sway device and hydraulic system for lifting and hoisting

Abstract

The present invention discloses a hydraulic damping and anti-sway device and a hydraulic system for lifting and hoisting, belonging to the technical field of lifting equipment. It comprises: a plurality of hydraulic winches located below the hoisted object, wherein the lifting rope led out by each hydraulic winch is detachably connected to the hoisted object, the hydraulic winches are divided into a plurality of hydraulic winch combinations, and there are no less than two groups, each hydraulic winch combination contains at least two hydraulic winches positioned opposite each other, one hydraulic winch in the same hydraulic winch combination releases part of the lifting rope, and the other hydraulic winch retracts part of the lifting rope, and the force required to release the lifting rope is greater than the force required to retract the lifting rope. The hydraulic damping and anti-sway device and hydraulic system for lifting and hoisting provided by the present invention can prevent shaking during the lifting of heavy objects and the subsequent docking process, thereby reducing the difficulty of docking installation.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting equipment, and in particular to a hydraulic damping and anti-swaying device and a hydraulic system for lifting and hoisting. Background Art

[0002] At present, the lifting and subsequent docking operations of heavy objects are generally completed by cranes and other lifting equipment in conjunction with lifting locks. However, the existing lifting locks have poor lifting stability and are prone to shaking during the lifting of heavy objects, especially in the open air with strong winds, which will bring certain safety hazards to the lifting work and is not conducive to subsequent docking operations. Summary of the Invention

[0003] In order to solve the above problems existing in the prior art, the present invention aims to provide a hydraulic damping and anti-sway device and a hydraulic system for lifting and hoisting, which can prevent swaying during the lifting of heavy objects and the subsequent docking process, thereby reducing the difficulty of docking installation.

[0004] The specific technical solutions are as follows:

[0005] A hydraulic damping and anti-swaying device for lifting and hoisting comprises a plurality of hydraulic winches.

[0006] A plurality of hydraulic winches are located below the hoisted object, wherein a hoisting rope led out from each hydraulic winch is detachably connected to the hoisted object.

[0007] The hydraulic winches are divided into several groups of hydraulic winch combinations, and there are no less than two groups. Each group of hydraulic winch combinations contains at least two hydraulic winches positioned opposite each other. One hydraulic winch in the same hydraulic winch combination releases part of the lifting rope, and the other hydraulic winch retracts part of the lifting rope, and the force required to release the lifting rope is greater than the force required to retract the lifting rope.

[0008] The above-mentioned hydraulic damping and anti-swaying device for lifting and hoisting also has the following characteristics, and further includes a fixed body, which is located below the hoisted object, and a plurality of hydraulic winches are arranged on the fixed body.

[0009] The above-mentioned hydraulic damping and anti-swaying device for lifting and hoisting also has the following characteristics, and further includes a hydraulic pump station, which is connected to all hydraulic winches through pipelines.

[0010] A hydraulic system of a hydraulic damping and anti-sway device for lifting and hoisting, comprising a hydraulic pump, a liquid storage device, a reversing valve, a plurality of proportional relief valves and a plurality of one-way valves, wherein a valve port on one side of the reversing valve is connected to the hydraulic pump through an oil inlet circuit, and the other valve port is connected to the liquid storage device through an oil outlet pipeline, and the other side of the reversing valve is connected to a plurality of proportional relief valves arranged in parallel and a plurality of control pipelines of hydraulic winches arranged in parallel, and each proportional relief valve is connected in parallel with a one-way valve, and each proportional relief valve is connected in series with the control pipeline of the corresponding hydraulic winch.

[0011] The above-mentioned hydraulic system of the hydraulic damping and anti-sway device for lifting and hoisting also has the following characteristics: the reversing valve is a three-position four-way electromagnetic reversing valve, including a rope-retracting control position, an unloading control position and a rope-releasing control position, and the unloading control position is located between the rope-retracting control position and the rope-releasing control position.

[0012] The hydraulic system of the hydraulic damping and anti-sway device for lifting and hoisting further has the following characteristics: when the reversing valve is in the rope-releasing control position, the port A corresponding to the hydraulic winch is connected to the hydraulic pump through the pipeline of the reversing valve, and the port B corresponding to the hydraulic winch is connected to the liquid storage device through the pipeline of the corresponding proportional relief valve, the one-way valve, and the reversing valve;

[0013] The reversing valve is in the rope retraction control position, and the B port of the corresponding hydraulic winch is connected to the hydraulic pump through the one-way valve, proportional relief valve, and the pipeline of the reversing valve, and the A port of the corresponding hydraulic winch is connected to the liquid storage device through the pipeline of the reversing valve;

[0014] The reversing valve is in the unloading control position, and the A port and B port of the hydraulic winch are connected to the hydraulic pump and the liquid storage device respectively.

[0015] The above-mentioned hydraulic system of the hydraulic damping and anti-swaying device for lifting and hoisting also has the following characteristics, and further includes a control device, which is communicatively connected with each proportional overflow valve.

[0016] The above-mentioned hydraulic system of the hydraulic damping and anti-sway device for lifting and hoisting also has such characteristics, and also includes a plurality of pressure sensors. The pressure sensors are arranged at the B port of each hydraulic winch, and the pressure sensors and hydraulic winches are respectively communicated with the control device.

[0017] The positive effects of the above technical solution are:

[0018] The present invention provides a hydraulic damping and anti-sway device and a hydraulic system for lifting and hoisting. The anti-sway system gradually absorbs the swaying energy of the hoisted heavy object through the hydraulic damping effect of the hydraulic winch and the rope-reeling process of the hydraulic winch, converts it into heat of the hydraulic oil, thereby stabilizing the hoisted heavy object. During the rope-reeling process of the hydraulic winch, the hydraulic oil discharged from one hydraulic winch and the hydraulic oil flowing into another hydraulic winch are basically the same, and there is almost no need for the hydraulic pump to provide additional oil supply. Only a low-power hydraulic pump needs to be set to maintain a certain rope-reeling pressure. The structure is simple and the layout cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of an embodiment of a hydraulic damping and anti-swaying device for lifting and hoisting according to the present invention;

[0020] Figure 2 This is a system principle diagram of an embodiment of a hydraulic damping and anti-swaying hydraulic system for lifting and hoisting according to the present invention.

[0021] In the attached figure: 1. Lifting heavy objects; 2. Lifting rope; 3. Hydraulic winch; 4. Fixed body; 5. Liquid storage device; 6. Hydraulic pump; 7. Overflow valve; 8. Reversing valve; 9.1, 9.2, 9.3, 9.4 proportional overflow valves; 10.1, 10.2, 10.3, 10.4, one-way valves. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments are combined with the attached Figure 1 To the attached Figure 2 The present invention provides a hydraulic damping and anti-swaying device for lifting and hoisting.

[0023] The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or positional 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 limiting the present invention.

[0024] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0025] In the hydraulic damping and anti-sway device for lifting and hoisting, the device is mainly used to prevent sway during the docking and installation process after the heavy object is hoisted in an open air environment with strong wind. Generally, a detachable traction mechanism is provided on the lower end face of the hoisted heavy object 1. The specific traction mechanism can be set as a lifting ring. The number of the lifting rings is consistent with the number of the hydraulic winch 3, which is also an even number. The lifting rings are grouped in pairs and face each other. The distance between adjacent lifting rings is the same, so as to ensure that the distance from the corresponding hydraulic winch 3 to the corresponding lifting ring is equal during the traction process. Several hydraulic winches 3 are located below the hoisting weight 1. The hydraulic winches 3 are fixed. During the hoisting process, the hydraulic winches 3 gradually tighten all the lifting ropes. However, when the hoisting weight 1 shakes during the tightening process, the position of the hoisting weight 1 that is deviated and the pressure applied by the hydraulic winches 3 in the relative position will be adjusted. The lifting ropes led out by each hydraulic winch 3 are detachably connected to the hoisting weight 1. When the hoisting is completed, the hydraulic winch 3 and the lifting ropes will be separated and removed from the hoisting weight 1.

[0026] Furthermore, the lifting rope led out from the hydraulic winch can be detachably connected to the edge of the hoisted object, or to the middle of the hoisted object, or to other positions of the hoisted object. It can be adaptively adjusted according to actual conditions, and the description here does not make any position limitations.

[0027] The hydraulic winch 3 is divided into several groups of hydraulic winch combinations, and there are no less than two groups. Each group of hydraulic winch combinations contains at least two hydraulic winches 3 in opposite positions. Generally, it can be set into two groups or four groups. When the hydraulic winches 3 are set into two groups, the two hydraulic winches 3 in the same group are connected to form a connecting line, and the two connecting lines are perpendicular to each other. When the hydraulic winches 3 are set into four groups, the two hydraulic winches 3 in the same group are connected to form a connecting line, and a 45° angle is formed between the two adjacent connecting lines. One hydraulic winch 3 in the same hydraulic winch 3 combination of the two connecting lines releases part of the lifting rope 2, and the other hydraulic winch 3 retracts part of the lifting rope 2. Specifically, when the hoisted heavy object 1 shakes to one side, the hydraulic winch near the side The vehicle 3 pulls out part of the rope 2 (i.e., the hydraulic winch 3 releases part of the rope 2), and the hydraulic winch 3 away from that side retracts part of the rope 2, thereby preventing the hoisted heavy object 1 from swinging to that side, and the force required to release the rope 2 is greater than the force required to retract the rope 2. Generally, the set pressure of the hydraulic winch 3 for releasing the rope is controlled by the proportional relief valve (9.1, 9.2, 9.3, 9.4), and the set pressure of the hydraulic winch 3 for retracting the rope is controlled by the relief valve 7. The resistance of the oil passing through the proportional relief valve (9.1, 9.2, 9.3, 9.4) is large, and the resistance of the rope 2 being pulled out is much greater than the rope retracting power, so it can gradually prevent the hoisted heavy object 1 from swinging to one side.

[0028] In a preferred embodiment, Figure 1 As shown, the apparatus further includes a fixed body 4, which is located below the hoisted weight 1, and a plurality of hydraulic winches 3 are disposed on the fixed body 4, specifically in the middle of the fixed body 4, although they can also be disposed at other locations. The above description does not limit the location. The hydraulic winches 3 are evenly distributed in a rectangular or circular array, and the hoisting ropes 2 are radially connected to the edge of the lower end face of the hoisted weight 1 from the middle to the outside, facilitating stable hoisting of the weight 1.

[0029] In a preferred embodiment, Figure 1 As shown, the hydraulic oil discharged from one hydraulic winch 3 is substantially equal to the hydraulic oil entering the opposite hydraulic winch 3, and there is almost no need for additional oil supply from the hydraulic pump 6. Therefore, the hydraulic pump 6 requires almost no flow and only a small amount of power to maintain a certain rope reeling pressure of the hydraulic winch 3.

[0030] In a preferred embodiment, Figure 1 As shown, it also includes a hydraulic pump station, which is connected to all hydraulic winches 3 through pipelines. The hydraulic pump station provides part of the hydraulic oil to the retracting and extending ropes 2 of the hydraulic winches 3. The power of the hydraulic oil is relatively small, and the overall layout cost is low.

[0031] In the hydraulic system of the hydraulic damping anti-sway device for lifting and hoisting, a hydraulic pump 6, a liquid storage device 5, a reversing valve 8, a plurality of proportional relief valves (9.1, 9.2, 9.3, 9.4) and a plurality of one-way valves (10.1, 10.2, 10.3, 10.4) are included. The hydraulic pump 6 is used to provide power for the oil flow between the relatively arranged hydraulic winches 3 or between the hydraulic winch 3 and the liquid storage device 5. Part of the oil stored in the liquid storage device 5 can be used to supplement the oil in the pipeline of the hydraulic winch 3, and the oil in the subsequent maintenance of the anti-sway device can be used to replenish the oil in the pipeline of the hydraulic winch 3. Temporary storage, the reversing valve 8 is used for the anti-sway device to switch between different working conditions under different circumstances, the proportional relief valve (9.1, 9.2, 9.3, 9.4) is used to adjust the rope-out and rope-reeling pressure of the hydraulic winch 3, the proportional relief valve (9.1, 9.2, 9.3, 9.4) and the one-way valve (10.1, 10.2, 10.3, 10.4) are arranged in parallel to form two control oil circuits with opposite flow directions, wherein a valve port on one side of the reversing valve 8 is connected to the hydraulic pump 6 through the oil inlet circuit, and the valve port serves as the reversing valve 8 The oil inlet on this side, the other valve port is connected to the liquid storage device 5 through the oil outlet pipeline, and the valve port serves as the oil outlet on this side of the reversing valve 8. When the hydraulic winch 3 is reeling in or releasing the rope, the hydraulic oil flows out from the oil outlet and flows back into the oil inlet. The other side of the reversing valve 8 is connected to a number of proportional relief valves (9.1, 9.2, 9.3, 9.4) arranged in parallel, and a number of control pipelines of the hydraulic winches 3 arranged in parallel, and each proportional relief valve (9.1 or 9.2 or 9.3 or 9.4) is connected in parallel with a one-way valve (10.1 or 10.2 or 10.3 Or 10.4), that is, when the flow flows in the forward or reverse direction, it can only pass through one of the proportional relief valve (9.1 or 9.2 or 9.3 or 9.4) or the one-way valve (10.1 or 10.2 or 10.3 or 10.4), and the other is in a closed state. Each proportional relief valve (9.1 or 9.2 or 9.3 or 9.4) is connected in series with the control pipeline of the corresponding hydraulic winch 3. By controlling the force applied by the proportional relief valve (9.1 or 9.2 or 9.3 or 9.4), the rope-releasing resistance and rope-reeling power of the hydraulic winch 3 are adjusted.

[0032] In a preferred embodiment, Figure 2As shown, the reversing valve 8 is a three-position, four-way solenoid reversing valve, including a rope-retracting control position, a load-unloading control position, and a rope-releasing control position. The load-unloading control position is located between the rope-retracting and rope-releasing control positions. When the device is in the process of hoisting a heavy object, the reversing valve 8 switches between the rope-retracting and rope-releasing control positions to assist the hydraulic winch 3 installed opposite to it in completing the rope-retracting and rope-releasing operations. Specifically, the reversing valve 8 is provided with a solenoid switch S1 and a solenoid switch S2 on either side. When S1 is energized, the rope-retracting control position of the reversing valve 8 is in an oil-passing state; when S2 is energized, the rope-releasing control position of the reversing valve 8 is in an oil-passing state. Of course, the reversing valve 8 can also use other types of valve bodies, as long as they can achieve forward and reverse flow conversion of the oil circuit in the pipeline.

[0033] In a preferred embodiment, Figure 2 As shown, the reversing valve 8 is in the rope-releasing control position, and the corresponding port A of the hydraulic winch is connected to the hydraulic pump 6 through the pipeline of the reversing valve 8. The hydraulic pump 6 can pump the oil in the liquid storage device 5. The corresponding port B of the hydraulic winch 3 is connected to the liquid storage device 5 through the corresponding proportional relief valve (9.1 or 9.2 or 9.3 or 9.4) and the pipeline of the reversing valve 8. That is, the hydraulic pump 6 transports the oil through the reversing valve 8, the port A of the hydraulic winch 3, the port B of the hydraulic winch 3, the proportional relief valve (9.1 or 9.2 or 9.3 or 9.4), the one-way valve (10.1 or 10.2 or 10.3 or 10.4), and the reversing valve 8 back to the reservoir 5 or the reversing valve 8, thereby rotating the hydraulic winch 3 to perform the rope-releasing operation. Because the oil circuit in the rope-releasing process needs to pass through the proportional relief valve (9.1 or 9.2 or 9.3 or 9.4) but not through the one-way valve (10.1 or 10.2 or 10.3 or 10.4), in the above oil flow direction, the one-way valve (10.1 or 10.2 or 10.3 or 10.4) is closed and the oil cannot pass through, so the flow resistance of the oil is relatively large.

[0034] The reversing valve 8 is in the rope-retracting control position, and the corresponding port B of the hydraulic winch 3 is connected to the hydraulic pump 6 through the one-way valve (10.1 or 10.2 or 10.3 or 10.4) and the pipeline of the reversing valve 8. The hydraulic pump 6 can extract the oil in the liquid storage device 5. The corresponding port A of the hydraulic winch 3 is connected to the liquid storage device 5 through the pipeline of the reversing valve 8, that is, the hydraulic pump 6 transports the oil through the pipeline of the reversing valve 8, the one-way valve (10.1 or 10.2 or 10.3 or 10.4), the proportional overflow valve, and the like. The oil flows through the valve (9.1 or 9.2 or 9.3 or 9.4), port B of the hydraulic winch 3, port A of the hydraulic winch 3, and the reversing valve 8 pipeline back to the reservoir 5 or the reversing valve 8, thereby rotating the hydraulic winch 3 to perform the rope reeling operation. Because the oil circuit during the rope reeling process does not pass through the proportional relief valve (9.1 or 9.2 or 9.3 or 9.4) or passes only a small amount through the proportional relief valve (9.1 or 9.2 or 9.3 or 9.4), and mainly passes through the check valve (10.1 or 10.2 or 10.3 or 10.4), the oil flow resistance is relatively low. Therefore, a significant difference can be achieved between the power of rope reeling and the resistance of rope unreeling.

[0035] The reversing valve 8 is in the unloading control position, and the A port and the B port of the hydraulic winch 3 are connected to the hydraulic pump 6 and the liquid storage device 5 respectively, thereby suspending the operation of the hydraulic winch 3 to facilitate subsequent maintenance.

[0036] In a preferred embodiment, Figure 2 As shown, the hydraulic system further includes a control device (not shown in the figure), which is in communication with each proportional relief valve (9.1, 9.2, 9.3, 9.4). The control device can automatically adjust the set pressure of each proportional relief valve so that it gradually increases according to a certain pattern, thereby increasing the resistance to the pulling of the lifting rope 2, thereby increasing the damping effect on the suspended weight 1. The specific set pressure gradually increases with the number of times the suspended weight 1 shakes. Through the action of hydraulic damping, the energy of the suspended weight 1 shaking is converted into heat of the hydraulic oil, thereby finally stabilizing the suspended weight.

[0037] In a preferred embodiment, Figure 2 As shown, it also includes several pressure sensors (not shown in the figure). The pressure sensors are set at the B port of each hydraulic winch to monitor the pressure value of the B port in real time. The pressure sensors and the hydraulic winches 3 are respectively connected to the control device for communication. Specifically, when the hoisted heavy object 1 deviates to one side, the lifting rope 2 on the opposite side will be significantly pulled. The pressure sensor on the side detects the significant change in pressure and transmits the signal to the control device, which then controls the corresponding group of hydraulic winches 3 to retract and release the rope to achieve automatic stabilization of the hoisted heavy object 1. The structure is simple and easy to adjust automatically.

[0038] The working principle of the hydraulic damping and anti-sway device is as follows: the principle is specifically described using four hydraulic winches (M1, M2, M3, M4, where M1 and M3 are opposite, and M2 and M4 are opposite). When the three-position four-way electromagnetic reversing valve S1 is energized and the rope 2 of the hydraulic winch is in the rope-retracting (damping and buffering) working condition, Figure 1 When the hoisted object 1 swings to the right, the rope of hydraulic winch M3 is retracted, and its tightening force is determined by the set pressure of relief valve 7 in the same oil circuit. Subsequently, the S2 terminal of the three-position four-way solenoid valve is energized, and the hydraulic winch rope is in the rope-releasing condition. When the rope of hydraulic winch M1 is pulled out, hydraulic oil flows from port B1 of hydraulic winch M3 through proportional relief valve 9.1, generating resistance. At this time, the resistance to the pulling of rope 2 is determined by the set pressure of proportional relief valve 9.1. Since the set pressure of proportional relief valve 9.1 is much greater than the set pressure of relief valve 7, the resistance to the pulling of rope 2 is much greater than the rope-retraction force, which prevents the hoisted object 1 from swinging to the right. The reverse is also true. In the above process, the control device automatically adjusts the set pressure of each proportional relief valve (9.1, 9.2, 9.3, 9.4) so ​​that it gradually increases according to a certain rule, so that the resistance to pulling out the lifting rope 2 becomes greater and greater, and the damping and anti-swaying effect on the hoisted heavy object 1 becomes more and more obvious.

[0039] The following is a specific application example: the split-unit hoisting of an offshore wind turbine nacelle. The nacelle sways at altitude for a distance L = ±0.8m, a period T = 10s, and a maximum sway velocity V(max) = 0.5m / s. Four 10kN hydraulic winches are fixed in the center of the wind turbine tower in the four directions of east, west, south, and north. The maximum speed of their wire rope retraction and extension is 60rpm. The winch ropes are hung at four fixed positions on the edge of the nacelle, such as Figure 1 It is equipped with a hydraulic pump station with a motor power of 1.5kW, the set pressure of the relief valve is 1-2MPa, and the set pressure of the four proportional relief valves is adjusted by the control device, with the maximum pressure being 20MPa.

[0040] When the cabin sways to the right, the rope of the hydraulic winch M1 is stretched, and under the action of the pressure set by the proportional relief valve, the rope is pulled out with a force of about 10kN, while the rope of the hydraulic winch M3 in the reverse position is retracted, and under the action of the pressure set by the relief valve, the wire rope is retracted with a force of only 0.5 to 0.8kN. Therefore, the cabin is subjected to a force to the left (and the force to the left is relatively small), thereby reducing the amplitude of the sway; conversely, when the cabin sways to the left, the cabin is subjected to a force to the right and the amplitude of the sway is reduced again; this process repeats itself, and the cabin gradually stops swaying and stabilizes, and finally falls down and docks with the flange at the top of the tower for installation.

[0041] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The above are only preferred embodiments of the present invention and do not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic system for a hydraulic damping and anti-sway device for lifting and hoisting, characterized in that: The hydraulic damping and anti-swaying device comprises: A plurality of hydraulic winches, wherein the plurality of hydraulic winches are located below the hoisted object, wherein a hoisting rope led out from each hydraulic winch is detachably connected to the hoisted object; The hydraulic winches are divided into a plurality of hydraulic winch assemblies, and there are no less than two groups. Each hydraulic winch assembly includes at least two hydraulic winches positioned opposite to each other. One hydraulic winch in the same hydraulic winch assembly releases a portion of the lifting rope, and the other hydraulic winch retracts a portion of the lifting rope. The force required to release the lifting rope is greater than the force required to retract the lifting rope. The hydraulic system includes the hydraulic damping and anti-sway device, and also includes a hydraulic pump, a liquid storage device, a reversing valve, a plurality of proportional relief valves and a plurality of one-way valves, wherein a valve port on one side of the reversing valve is connected to the hydraulic pump through an oil inlet circuit, and the other valve port is connected to the liquid storage device through an oil outlet pipeline, and the other side of the reversing valve is connected to a plurality of the proportional relief valves arranged in parallel and a plurality of control pipelines of the hydraulic winches arranged in parallel, and each of the proportional relief valves is connected in parallel with a one-way valve, and each of the proportional relief valves is connected in series with the control pipeline of the corresponding hydraulic winch; The reversing valve is a three-position four-way electromagnetic reversing valve, comprising a rope-collecting control position, a load-unloading control position, and a rope-releasing control position, and the load-unloading control position is located between the rope-collecting control position and the rope-releasing control position; The reversing valve is in the rope-releasing control position, the port A corresponding to the hydraulic winch is connected to the hydraulic pump through the pipeline of the reversing valve, and the port B corresponding to the hydraulic winch is connected to the liquid storage device through the corresponding proportional relief valve, the one-way valve, and the pipeline of the reversing valve; The reversing valve is in the rope retraction control position, and the port B corresponding to the hydraulic winch is connected to the hydraulic pump through the one-way valve, the proportional relief valve, and the pipeline of the reversing valve, and the port A corresponding to the hydraulic winch is connected to the liquid storage device through the pipeline of the reversing valve; The reversing valve is in the unloading control position, and the port A and the port B of the hydraulic winch are connected to the hydraulic pump and the liquid storage device respectively.

2. The hydraulic system of the hydraulic damping and anti-swaying device for lifting and hoisting according to claim 1 is characterized in that: It also includes a fixed body, which is located below the hoisted object, and a plurality of hydraulic winches are arranged on the fixed body.

3. The hydraulic system of the hydraulic damping and anti-swaying device for lifting and hoisting according to claim 1, characterized in that: It also includes a hydraulic pump station, which is connected to all the hydraulic winches through pipelines.

4. The hydraulic system of the hydraulic damping and anti-swaying device for lifting and hoisting according to claim 1 is characterized in that: It also includes a control device, which is communicatively connected with each of the proportional relief valves.

5. The hydraulic system of the hydraulic damping and anti-swaying device for lifting and hoisting according to claim 4, characterized in that: It also includes a plurality of pressure sensors, which are arranged at the B port of each hydraulic winch. The pressure sensors and the hydraulic winches are respectively connected to the control device for communication.

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