Hydraulically driven steel cable crawling device

Abstract

The present application relates to ship-to-ship loading and unloading arm technical field, especially a kind of hydraulic drive steel wire rope crawling device, including device mounting plate;Hydraulic motor is installed on device mounting plate;Driving wheel assembly is fixedly connected with the output shaft of hydraulic motor;Single-stage guide roller and double-stage guide roller are respectively arranged in the two sides of driving wheel assembly;At least two groups of press wheel assemblies are respectively arranged above and below driving wheel assembly, for adjusting the friction between driving wheel assembly and steel wire rope;Steel wire rope is sequentially wound around single-stage guide roller, driving wheel assembly and double-stage guide roller.The present application can conveniently adjust the friction between driving wheel and steel wire rope by setting press wheel assembly above and below driving wheel assembly, effectively prevent skidding phenomenon, ensure reliable transmission;By setting multiple grease filling port, the bearing parts of hydraulic motor and each guide roller can be regularly lubricated, reduce equipment wear, prolong service life.

Description

Technical Field

[0001] This invention relates to the field of ship-to-ship loading and unloading boom technology, and in particular to a hydraulically driven wire rope crawling device. Background Technology

[0002] A ship-to-ship (STS) loading arm is a high-strength, highly flexible mechanical pipeline connection device specifically designed for the direct transfer of liquid / gaseous cargo (LNG or NG, etc.) between two vessels at sea (FSRU and LNGC). Installed on the FSRU deck and connected to the LNGC's manifold flange, this device maintains a stable, sealed connection and ensures safe operation even amidst the six degrees of freedom of ship movement caused by waves, tides, and wind.

[0003] Because the FSRU and LNGC are constantly in relative motion due to the waves, factors such as the amplitude, frequency, and acceleration of the motion on both sides can make it difficult for operators to accurately connect the loading arm to the manifold flange of the LNGC. During the final stage of the receiving process, i.e., the QCDC approach phase, the QCDC interface of the loading arm must be synchronized with the movement of the target vessel to achieve docking. To meet this requirement, existing technology incorporates an aiming system on the loading arm, and the wire rope crawler is a crucial component of this aiming system.

[0004] Existing wire rope crawling devices have the following disadvantages: the friction between the drive wheel and the wire rope is difficult to adjust, and slippage is likely to occur; there is a lack of effective lubrication structure, resulting in rapid equipment wear and short service life; maintenance is difficult, requiring the disassembly of a large number of parts for internal inspection and repair; and the guiding performance is poor, with the wire rope easily slipping off the roller, affecting docking accuracy and safety. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing hydraulically driven wire rope crawling device has inconvenient friction adjustment, poor lubrication effect, difficult inspection and maintenance, and poor guiding performance, and cannot reliably achieve synchronous movement and precise docking between the loading arm quick connector and the target ship manifold under harsh sea conditions.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a hydraulically driven wire rope crawling device, comprising: a device mounting plate; a hydraulic motor mounted on the device mounting plate; a drive wheel assembly fixedly connected to the output shaft of the hydraulic motor; single-stage guide rollers and double-stage guide rollers respectively disposed on both sides of the drive wheel assembly; at least two sets of pressure roller assemblies respectively disposed above and below the drive wheel assembly for adjusting the friction between the drive wheel assembly and the wire rope; the wire rope sequentially passes over the single-stage guide rollers, the drive wheel assembly, and the double-stage guide rollers.

[0007] The end of the dual-stage guide roller is provided with a wire rope guide groove to support the wire rope, and the depth of the wire rope guide groove is 4 to 6 times the diameter of the wire rope.

[0008] The pressure roller assembly includes a pressure roller, an adjusting screw, and a locking nut. One end of the adjusting screw is hinged to the axle of the pressure roller, and the other end passes through a threaded hole on the mounting plate of the device and engages with the locking nut.

[0009] The mounting plate of the device is provided with at least two grease filling ports, which correspond to the bearing parts of the pressure roller assembly and the bearing parts of each guide roller, respectively.

[0010] Each of the grease filling ports is equipped with a detachable grease filling port cover, which is connected to the device mounting plate by a snap fastener.

[0011] The device mounting plate is provided with a maintenance cover plate, which is detachably connected to the device mounting plate by multiple bolts. The position of the maintenance cover plate corresponds to the installation position of the drive wheel assembly.

[0012] The hydraulic motor is a low-speed, high-torque roller hydraulic motor with a rated speed of 50-200 r / min and a rated torque of not less than 3000 N·m.

[0013] Both the single-stage guide roller (7) and the double-stage guide roller (9) are provided with rollers on their outer circumferences, and the gap between the rollers matches the cross-sectional shape of the wire rope (2).

[0014] The beneficial effects of this invention are: (1) By setting pressure roller assemblies above and below the drive wheel assembly, the present invention can conveniently adjust the friction between the drive wheel and the wire rope, effectively prevent slippage, and ensure reliable transmission. (2) By setting multiple grease filling ports, the bearing parts of the hydraulic motor and each guide roller can be lubricated regularly, reducing equipment wear and extending service life; (3) By setting up an inspection cover, key components such as the internal drive wheel assembly can be inspected and repaired without disassembling the entire device, thus improving maintenance efficiency; (4) Guide grooves matching the cross-sectional shape of the wire rope are provided on both the drive wheel assembly and the guide rollers, which effectively prevents the wire rope from slipping and improves the guiding performance and operational stability of the device; (5) A low-speed, high-torque hydraulic motor is used, which can provide sufficient driving force to adapt to the crawling conditions of high load and low speed, and ensure reliable operation under harsh sea conditions. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the present invention.

[0018] Figure 3 This is a schematic diagram of the internal structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the structure of the present invention in the connected state.

[0020] Figure 5 This is a side view of the present invention.

[0021] In the diagram: 1. Quick coupling; 2. Wire rope; 3. Constant tension device; 4. Hydraulically driven wire rope crawling device; 5. Target ship manifold; 6. Hydraulic motor; 7. Single-stage guide roller; 8. Pressure roller assembly; 81. Pressure roller; 82. Adjusting screw; 83. Locking nut; 9. Double-stage guide roller; 10. Device mounting plate; 11. Drive wheel assembly; 12. Grease filling port; 13. Grease filling port cover; 14. Inspection cover; 15. Wire rope guide groove. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The hydraulically driven wire rope crawling device 4 shown is mainly used in the aiming system of a ship-to-ship loading and unloading arm at sea. The device includes a mounting plate 10, which is a rectangular steel plate used to mount all other components. A hydraulic motor 6 is bolted to one side of the mounting plate 10. In this embodiment, the hydraulic motor 6 is a low-speed, high-torque roller hydraulic motor with a rated speed of 170 r / min and a rated torque of 2371 N·m, providing sufficient driving force to adapt to high-load, low-speed crawling conditions.

[0025] The drive wheel assembly 11 is bolted to the output shaft of the hydraulic motor 6, and is located on the other side of the device mounting plate 10. A single-stage guide roller 7 and a double-stage guide roller 9 are respectively installed on both sides of the drive wheel assembly 11, and both are rotatably mounted on the device mounting plate 10 via axles. The wire rope 2 passes sequentially around the single-stage guide roller 7, the drive wheel assembly 11, and the double-stage guide roller 9, forming a complete transmission path.

[0026] A set of pressure roller assemblies 8 are respectively provided above and below the drive wheel assembly 11 to adjust the friction between the drive wheel assembly 11 and the wire rope 2. Figure 3 As shown, the pressure roller assembly 8 includes a pressure roller 81, an adjusting screw 82, and a locking nut 83. One end of the adjusting screw 82 is hinged to the axle of the pressure roller 81, and the other end passes through a threaded hole on the mounting plate 10 and engages with the locking nut 83. By rotating the adjusting screw 82, the gap between the pressure roller 81 and the drive wheel assembly 11 can be adjusted, thereby changing the clamping force of the drive wheel assembly 11 on the wire rope 2, and thus adjusting the friction between the two. After adjustment, tightening the locking nut 83 will fix the position and prevent loosening.

[0027] The outer circumference of the drive wheel assembly 11 is provided with a wire rope guide groove 15 that matches the cross-sectional shape of the wire rope 2, and the depth of the wire rope guide groove 15 is 1 / 2 the diameter of the wire rope 2. The outer circumference of both the single-stage guide roller 7 and the double-stage guide roller 9 is also provided with guide grooves that match the cross-sectional shape of the wire rope 2, and the sides of the guide grooves are rounded. These guide grooves effectively prevent the wire rope 2 from slipping off the rollers during operation, improving the guiding performance and operational stability of the device.

[0028] The mounting plate 10 has three grease filling ports 12, corresponding to the bearing positions of the pressure roller assembly 6, the single-stage guide roller 7, and the double-stage guide roller 9, respectively. Each grease filling port 12 is equipped with a removable grease filling port cover 13, which is connected to the mounting plate 10 via a snap-fit. Grease can be periodically added to each bearing position through the grease filling ports 12, reducing equipment wear and extending service life. The grease filling port cover 13 prevents seawater, dust, and other impurities from entering the grease filling port 12, keeping the lubrication system clean.

[0029] The device mounting plate 10 is also equipped with a maintenance cover 14, which is detachably connected to the device mounting plate 10 by four bolts. The position of the maintenance cover 14 corresponds to the installation position of the drive wheel assembly 11. When it is necessary to inspect, repair or replace the drive wheel assembly 11, only the maintenance cover 14 needs to be removed for operation, without disassembling the entire device, which greatly improves maintenance efficiency.

[0030] The working process of this invention is as follows: One end of the wire rope 2 is connected to the target ship's manifold 5, and the other end is fixed to the constant tension device 3 on the ship where the loading arm is located. The constant tension device 3 keeps the wire rope 2 taut at all times, and can release the wire rope to adjust the tension after exceeding a certain tension to accommodate the relative movement between the two ships. When it is necessary to connect the quick connector 1 of the loading arm to the target ship's manifold 5, the hydraulic motor 6 is started, which drives the drive wheel assembly 11 to rotate. The drive wheel assembly 11, relying on the friction between itself and the wire rope 2, drives the entire hydraulically driven wire rope crawling device 4 and the quick connector 1 connected to it to move along the wire rope 2 towards the target ship's manifold 5. During the movement, the single-stage guide roller 7 and the double-stage guide roller 9 guide the wire rope 2 to ensure smooth operation of the device. When the quick connector 1 reaches the target ship's manifold 5, the hydraulic motor 6 is stopped, and the docking operation is completed.

[0031] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A hydraulically driven wire rope crawling device, characterized in that, include: The device mounting plate (10); a hydraulic motor (6) mounted on the device mounting plate (10); a drive wheel assembly (11) fixedly connected to the output shaft of the hydraulic motor (6); single-stage guide rollers (7) and double-stage guide rollers (9) respectively disposed on both sides of the drive wheel assembly (11); at least two sets of pressure roller assemblies (8) respectively disposed above and below the drive wheel assembly (11) for adjusting the friction between the drive wheel assembly (11) and the wire rope (2); the wire rope (2) passes around the single-stage guide roller (7), the drive wheel assembly (11) and the double-stage guide roller (9) in sequence.

2. The hydraulically driven wire rope crawling device according to claim 1, characterized in that, The end of the double-stage guide roller (9) is provided with a wire rope guide groove (15) to support the wire rope (2), and the depth of the wire rope guide groove (15) is 4 to 6 times the diameter of the wire rope (2).

3. The hydraulically driven wire rope crawling device according to claim 1, characterized in that, The pressure roller assembly (8) includes a pressure roller (81), an adjusting screw (82) and a locking nut (83). One end of the adjusting screw (82) is hinged to the axle of the pressure roller (81), and the other end passes through a threaded hole on the device mounting plate (10) and engages with the locking nut (83).

4. The hydraulically driven wire rope crawling device according to claim 1, characterized in that, The device mounting plate (10) is provided with at least two grease filling ports (12), which correspond to the bearing parts of the pressure roller assembly (8) and the bearing parts of each guide roller, respectively.

5. The hydraulically driven wire rope crawling device according to claim 4, characterized in that, Each of the grease filling ports (12) is provided with a detachable grease filling port cover (13), which is connected to the device mounting plate (10) by a snap fastener.

6. The hydraulically driven wire rope crawling device according to claim 1, characterized in that, The device mounting plate (10) is provided with a maintenance cover plate (14), which is detachably connected to the device mounting plate (10) by multiple bolts. The position of the maintenance cover plate (14) corresponds to the installation position of the drive wheel assembly (11).

7. The hydraulically driven wire rope crawling device according to claim 1, characterized in that, The hydraulic motor (6) is a low-speed, high-torque roller hydraulic motor with a rated speed of 50-200 r / min and a rated torque of not less than 3000 N·m.

8. The hydraulically driven wire rope crawling device according to claim 1, characterized in that, Both the single-stage guide roller (7) and the double-stage guide roller (9) are provided with rollers on their outer circumferences, and the gap between the rollers matches the cross-sectional shape of the wire rope (2).

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