Multifunctional portable small crane for cabin

Abstract

The utility model relates to a kind of cabin multifunctional portable small hoist, which belongs to the technical field of ship engineering auxiliary equipment.The small hoist is compatible and adapted to different manholes by using adjustable connection mode with new type connecting piece;Meanwhile, the design of the new type connecting piece and sunken manhole cover is suitable for various tanker cabin operating environment, especially for the occasions that need to frequently carry out cargo hoisting and personnel rescue.Above all, the small hoist provides a more convenient, efficient and safe solution for tanker cabin operation through the design of connecting the new type connecting piece with sunken manhole cover.This design not only improves operating efficiency and safety, but also reduces cost and meets diversified operating needs.

Description

Technical Field

[0001] This invention relates to a multifunctional portable small crane for use inside a cabin, which belongs to the technical field of marine engineering auxiliary equipment. Background Technology

[0002] In the working environment inside tankers, traditional mobile cranes are tightly connected to manhole coamings via specific connectors to ensure stability. However, with the continuous development of ship technology and the personalized needs of shipowners, the design of dual-fuel VLCCs, as an important type of large crude oil tanker, still needs continuous optimization to meet the demands of shipowners and the market. Among these options, sunken manhole covers are increasingly being chosen by shipowners due to their improved bulkhead sealing performance and ease of personnel access and cargo handling. However, with the increasing demand for these manholes from shipowners, the unique structure of sunken manhole covers makes it difficult for existing crane connectors to effectively integrate with them, thus limiting their application on newer tankers.

[0003] The existing small crane connectors are not suitable for the structural characteristics of the sunken manhole cover, which is very inconvenient for daily ship operations and storage of small cranes. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention aims to provide a structurally robust and detachable small crane. The design of the novel connector not only improves the overall structural stability and makes the small crane compatible with different types of manholes, but the detachable device also reduces the procurement cost of the small crane, optimizes the work process, and greatly improves work efficiency and the convenience of use for crew members.

[0005] The technical solution adopted in this invention is: a multi-functional portable small crane for use inside a cabin, the small crane including a base structure, a lifting rod structure, a portable moving mechanism and a cabin cover fixing mechanism;

[0006] In the base structure, the small hanging chassis adopts an I-shaped structure consisting of two chassis longitudinal bars and one chassis transverse bar. The hanging rod base is set at the center of the chassis transverse bar. One end of the support rod is connected to the chassis longitudinal bar, and the other end is fixedly supported on the hanging rod base.

[0007] In the aforementioned boom structure, the boom base is connected to the boom via pins. The boom is fixedly connected by a straight section and an inclined section, with an obtuse angle between the two sections. A guide pulley is provided at the end of the inclined section of the boom, and a boom bracket is provided on the straight section of the boom. A detachable starter motor and a gearbox are installed on the boom bracket. The gearbox drives a wire rope winding machine. A pressure block and an anti-detachment hook are provided at the end of the wire rope that passes over the guide pulley.

[0008] In the portable mobile mechanism, one end of each of the two chassis longitudinal rods is provided with a chassis roller, and the bottom of the boom bracket is provided with a bracket roller; a push rod is provided at the end of the boom near the guide pulley;

[0009] In the hatch cover fixing mechanism, the other end of the chassis longitudinal rod is connected to an L-shaped connecting piece via an eye plate bracket. For hatch covers with hatch coamings, the L-shaped connecting piece is positioned above the outer end of the eye plate, and the eye plate bracket is connected to different eye holes on the eye plate to align the eye holes on the eye plate with the hatch cover holes. For sunken hatch covers, the L-shaped connecting piece is flipped to the lower part of the inner end of the eye plate, and the eye plate bracket is connected to different eye holes on the eye plate to align the connecting hole of the L-shaped connecting piece with the hatch cover holes.

[0010] Furthermore, chassis feet are provided at the bottom of the chassis longitudinal rod.

[0011] Furthermore, a rod support is provided between the straight section and the inclined section of the rod, and a hook buckle for attaching an anti-detachment hook is provided on the rod support.

[0012] Furthermore, a slewing bolt is provided on the base of the boom.

[0013] Furthermore, the guide pulley is supported by a shaft and an oil-free bearing.

[0014] Furthermore, an oil mist lubricator is also installed on the boom.

[0015] A method for operating a multi-functional portable small crane used inside a cabin, the small crane including three working modes: hatch cover lifting mode, sinking hatch cover lifting mode, and portable movement mode;

[0016] Hatch cover hoisting mode: Set the small crane chassis around the hatch cover to be hoisted, insert the straight section of the boom into the boom base, and fix the boom and boom base with pins; rotate the boom to make the anti-detachment hook turn above the hatch cover to be hoisted, and tighten the slewing bolt;

[0017] When the hatch cover is the hatch cover, the hatch connector is installed in the forward direction. At this time, the L-shaped connecting piece is set above the outer end of the eye plate. Move the eye plate so that the eye hole on the eye plate is aligned with the hatch cover hole and tighten it with bolts. The eye plate is locked on the eye plate bracket.

[0018] Start the pneumatic motor, release the wire rope, and connect the anti-detachment hook to the lifting hole of the hatch cover; tighten the wire rope and lift the hatch cover;

[0019] Sinking hatch lifting mode:

[0020] Set the small lifting platform around the hatch cover to be lifted, insert the straight section of the lifting rod into the lifting rod base, and fix the lifting rod and the lifting rod base with pins; rotate the lifting rod to make the anti-detachment hook turn above the hatch cover to be lifted, and tighten the slewing bolt;

[0021] When the hatch cover is a sinking hatch cover, the hatch connector is installed in reverse. At this time, the L-shaped connecting piece is set below the inner end of the eye plate. Move the eye plate so that the connecting hole of the L-shaped connecting piece is aligned with the hatch cover hole and tighten it with bolts. The eye plate is then locked onto the eye plate bracket.

[0022] Start the pneumatic motor, release the wire rope, and connect the anti-detachment hook to the lifting hole of the hatch cover; tighten the wire rope and lift the hatch cover;

[0023] Portable mobile mode: Remove the pneumatic motor from the small crane, remove the anti-detachment hook from the lifting hole and hang it on the hook buckle of the crane rod support, then tilt the small crane until the chassis rollers and bracket rollers touch the ground, and push the push rod to move the small crane.

[0024] The beneficial effects of this invention are as follows: Existing portable hoists cannot adapt to manholes of different sizes and types. This hoist, employing a novel connector and an adjustable connection method, achieves compatibility and adaptation to different manholes. Furthermore, this novel connector and the recessed manhole cover design are suitable for various tanker operating environments, especially in situations requiring frequent cargo lifting and personnel rescue. In summary, the hoist's design, using a novel connector and recessed manhole cover, provides a more convenient, efficient, and safe solution for tanker operations. This design not only improves operational efficiency and safety but also reduces costs and meets diverse operational needs. Attached Figure Description

[0025] Figure 1 This is a side view of a multi-functional portable pendant used inside a cabin.

[0026] Figure 2 This is an enlarged view of the slewing bolt.

[0027] Figure 3 This is an enlarged view of the latch.

[0028] Figure 4 This is a front view of a multi-functional portable small crane used inside a cabin.

[0029] Figure 5 This is a top view of the multi-functional portable small crane used inside the cabin in Embodiment 1.

[0030] Figure 6 This is an enlarged view of the eyeplate in Example 1.

[0031] Figure 7 This is a top view of the multi-functional portable small crane used inside the cabin in Embodiment 2.

[0032] Figure 8 This is an enlarged view of the eyeplate in Example 2.

[0033] Figure 9This is a schematic diagram of a portable mobile mode for a multi-functional portable small pendant used inside a cabin.

[0034] In the diagram: 1. Boom base; 2. Boom; 2a. Straight section; 2b. Inclined section; 2c. Boom support; 3. Wire rope; 4. Anti-detachment hook; 5. Hand push rod; 6. Pin; 7. Rotary bolt; 8. Eye plate; 9. Support tube; 10. Small lifting chassis; 10a. Chassis crossbar; 10b. Chassis longitudinal bar; 10c. Chassis pad; 11. Pressure block; 12. Guide pulley; 13. Oil-free bearing; 14. Shaft; 15. Gearbox; 16. Pneumatic motor; 17. Oil mist lubricator; 18. Chassis roller; 19. Boom bracket; 20. Bracket roller; 21. Eye plate bracket; 22. L-shaped connecting piece; 23. Hook buckle. Detailed Implementation

[0035] The present invention will be specifically described below through embodiments. It should be noted that the following embodiments are only used to further illustrate the present invention, but are not limited thereto, unless otherwise stated.

[0036] This invention aims to provide a robust and detachable small crane, which not only enhances the overall structural stability but also allows the crane to be compatible with different types of manholes. Made of Q235B low-carbon steel, it ensures sufficient strength and durability, and the crane will not detach or loosen due to vibration or impact during operation. Simultaneously, the detachable device reduces the crane's procurement cost, optimizes the work process, and greatly improves operational efficiency and ease of use for crew members.

[0037] Figures 1 to 4 A multi-functional portable gantry for use inside a cabin is shown. The gantry includes a base structure, a boom structure, a portable movement mechanism, and a cabin cover fixing mechanism. In the base structure, the small hanging chassis 10 adopts an I-shaped structure consisting of two chassis longitudinal rods 10b and one chassis transverse rod 10a. The hanging rod base 1 is located at the center of the chassis transverse rod 10a. One end of the support rod 9 is connected to the chassis longitudinal rod 10b, and the other end is fixedly supported on the hanging rod base 1. In the hanging rod structure, the hanging rod 2 is connected to the hanging rod base 1 by a pin 6. The hanging rod 2 is fixedly connected by a straight rod section 2a and an inclined section 2b, and the straight rod section 2a and the inclined section 2b form an obtuse angle. A guide pulley 12 is provided at the end of the inclined section 2b of the hanging rod 2. A hanging rod bracket 19 is provided on the straight rod section 2a of the hanging rod 2. A detachable starter motor 16 and a gearbox 15 are installed on the hanging rod bracket 19. The gearbox 15 drives the wire rope winding machine. A pressure block 11 and an anti-detachment hook 4 are provided at the end of the wire rope 3 that passes over the guide pulley 12.

[0038] In the portable mobile mechanism, a chassis roller 18 is provided at one end of each of the two chassis longitudinal rods 10b, and a support roller 20 is provided at the bottom of the boom bracket 19; a push rod 5 is provided at the end of the boom 2 near the guide pulley 12.

[0039] In the hatch cover fixing mechanism, the other end of the chassis longitudinal rod 10b is connected to the L-shaped connecting piece 22 through the eye plate bracket 21; for hatch covers with hatch coaming, the L-shaped connecting piece 22 is set above the outer end of the eye plate 8, and the eye plate bracket 21 is connected to different eye holes on the eye plate 8 to align the eye holes on the eye plate 8 with the hatch cover holes; for sinking hatch covers, the L-shaped connecting piece 22 is flipped to the lower part of the inner end of the eye plate 8, and the eye plate bracket 21 is connected to different eye holes on the eye plate 8 to align the connecting hole of the L-shaped connecting piece 22 with the hatch cover holes.

[0040] A chassis foot 10c is provided at the bottom of the chassis longitudinal rod 10b. A boom support 2c is provided between the straight section 2a and the inclined section 2b of the boom 2, and a hook buckle 23 for attaching the anti-detachment hook is provided on the boom support 2c. A slewing bolt 7 is provided on the boom base 1. The guide pulley 12 is supported by a shaft 14 and an oilless bearing 13. An oil mist lubricator 17 is also provided on the boom 2.

[0041] Specifically, a multi-functional portable hoist for in-cabin lifting of goods / personnel rescue mainly includes a hoist base 1, a hoist 2, a wire rope 3, an anti-detachment hook 4, a push rod 5, a pin 6, a slewing bolt 7, an eye plate 8, a support tube 9, a small hoist chassis 10, a pressure block 11, a guide pulley 12, an oil-free bearing 13, a shaft 14, a gearbox 15, a pneumatic motor 16, an oil mist lubricator 17, and rollers 18.

[0042] The boom base 1 is made of high-strength material, which provides better stability and reliability. The boom 2 is ingeniously designed and has a compact structure, which can meet the requirements of flexible operation in a limited cabin space.

[0043] The steel wire rope 3 connects the boom to the load, ensuring sufficient wear resistance. The anti-detachment hook 4 adopts a unique safety locking mechanism, which effectively prevents the load from accidentally falling off during the lifting process, further improving the safety of the operation.

[0044] The gearbox 15 and the oil mist lubricator 17 are cleverly combined, which not only improves the working efficiency of the device, but also ensures the stability and reliability of the small crane during long-term operation.

[0045] The design of pin 6 and swivel bolt 7 fully considers the stability of the structure and the convenience of connection, so that all components can fit together tightly.

[0046] The Eye Plate 8 setting provides more connection and collection options, further enhancing the flexibility and practicality of the mini pendant.

[0047] The use of support tube 9 makes the entire small crane move more smoothly and stably, while the selection of oil-free bearing 13 further reduces friction and wear, improving the operating efficiency and service life of the equipment.

[0048] The boom base 1 is the stable foundation of the entire device, used to support and fix the boom 2. The wire rope 3 is connected to the boom to realize the lifting and suspension of the load. The anti-detachment hook 4 ensures that the load will not fall off accidentally during the lifting process, increasing safety. The push rod 5 and roller 18 are used to move the entire small crane, improving its portability. The gearbox 15 is used to adjust and improve the working efficiency of the small crane, ensuring smooth operation. The oil mist lubricator 17 can lubricate the equipment, reduce wear, and extend service life. The pin 6 and shaft 14 are used to connect and fix various components, transmit torque and force, and ensure the normal operation of the small crane. The slewing bolt 7 and support tube 9 provide additional support and stability for the small crane. The small crane chassis 10 is the bottom structure of the entire device, supporting the weight of the entire equipment. The guide pulley 12 guides the movement of the wire rope or other components, ensuring more precise and stable operation.

[0049] A method for operating a multi-functional portable hoist used inside a cabin, the hoist having three operating modes: hatch cover hoisting mode, sunken hatch cover hoisting mode, and portable movement mode.

[0050] The small crane base has two types of connecting plates. When the small crane is used for a hatch cover with a hatch coaming, connecting plate A can be directly installed on the flange of the hatch cover to serve as a fixation and support. When the small crane is used for a sunken hatch cover, first fix both ends of the small crane support to the two sides of the opening, then rotate the connecting plate 180 degrees to align the opening of the connecting plate with the center of the opening on the deck, and then use a nut to pass through the center to fix it.

[0051] When the small crane is used for hatch covers of different sizes, simply unscrew the nuts on the small crane support and switch the openings at different positions to adapt to hatch covers of different sizes.

[0052] Example 1

[0053] Figure 5 and Figure 6 The hatch cover hoisting mode is shown: the small hoisting chassis 10 is set around the hatch cover to be hoisted, the straight rod section 2a of the hoisting rod 2 is inserted into the hoisting rod base 1, and the hoisting rod 2 and the hoisting rod base 1 are fixed with the pin 6; the hoisting rod 2 is rotated so that the anti-detachment hook 4 is rotated to the top of the hatch cover to be hoisted, and the slewing bolt 7 is locked.

[0054] When the hatch cover is to be a hatch cover, the L-shaped connecting piece 22 is placed above the outer end of the eye plate 8. The eye plate 8 is moved so that the eye hole on the eye plate 8 is aligned with the hatch cover hole and locked with bolts. The eye plate 8 is locked onto the eye plate bracket 21.

[0055] Start the pneumatic motor 16, release the wire rope 3, and connect the anti-detachment hook 4 to the lifting hole of the hatch cover; tighten the wire rope 3 and lift the hatch cover.

[0056] Example 2

[0057] Figure 7 and Figure 8 The following describes the lifting mode for a sunken hatch: The small lifting platform 10 is placed around the hatch to be lifted, the straight section 2a of the lifting rod 2 is inserted into the lifting rod base 1, and the lifting rod 2 and the lifting rod base 1 are fixed with the pin 6; the lifting rod 2 is rotated so that the anti-detachment hook 4 is rotated above the hatch to be lifted, and the slewing bolt 7 is locked.

[0058] If the hatch cover is a recessed hatch cover, place the L-shaped connecting piece 22 below the inner end of the eye plate 8, move the eye plate 8 so that the connecting hole of the L-shaped connecting piece 22 is aligned with the hatch cover hole and tighten it with bolts, and the eye plate 8 is locked on the eye plate bracket 21.

[0059] Start the pneumatic motor 16, release the wire rope 3, and connect the anti-detachment hook 4 to the lifting hole of the hatch cover; tighten the wire rope 3 and lift the hatch cover.

[0060] Example 3

[0061] Figure 9 The portable movement mode is shown: remove the pneumatic motor 16 from the small crane, tilt the small crane until the chassis rollers 18 and the bracket rollers 20 touch the ground, and push the push rod 5 to move the small crane.

[0062] When it is necessary to move the small crane to a designated location, the motor and oil mist processor on the small crane must first be removed. Then, the small crane is tilted, and the small crane can be moved by using the pulleys on the boom and the push rod, making the movement of the small crane more convenient.

[0063] The above embodiments are only used to illustrate the present invention. Any equivalent transformations and improvements made on the basis of the technical solutions of the present invention should not be excluded from the protection scope of the present invention.

Claims

1. A multi-functional portable small crane for use inside a cabin, characterized in that, The small crane includes a base structure, a boom structure, a portable moving mechanism, and a hatch fixing mechanism; In the base structure, the small hanging chassis (10) adopts an I-shaped structure consisting of two chassis longitudinal rods (10b) and one chassis transverse rod (10a). The hanging rod base (1) is set at the center of the chassis transverse rod (10a). One end of the support rod (9) is connected to the chassis longitudinal rod (10b), and the other end is fixedly supported on the hanging rod base (1). In the aforementioned boom structure, the boom base (1) is connected to the boom (2) via a pin (6), and a slewing bolt (7) is provided on the boom base (1); the boom (2) is fixedly connected by a straight section (2a) and an inclined section (2b), with an obtuse angle between the straight section (2a) and the inclined section (2b), and a boom support (2c) is provided between the straight section (2a) and the inclined section (2b), and a hook buckle (23) for attaching the anti-detachment hook (4) is provided on the boom support (2c); a guide pulley (12) is provided at the end of the inclined section (2b) of the boom (2), and a boom bracket (19) is provided on the straight section (2a) of the boom (2), and a detachable pneumatic motor (16) and a gearbox (15) are installed on the boom bracket (19), the gearbox (15) drives the wire rope winding machine, and a pressure block (11) and an anti-detachment hook (4) are provided at the end of the wire rope (3) that passes over the guide pulley (12). In the portable mobile mechanism, a chassis roller (18) is provided at one end of each of the two chassis longitudinal rods (10b), a support roller (20) is provided at the bottom of the boom bracket (19), and a push rod (5) is provided at the end of the boom (2) near the guide pulley (12); the positions of the chassis roller (18), the support roller (20) and the push rod (5) are configured such that after the pneumatic motor (16) is removed and the anti-detachment hook (4) is hung on the hook buckle (23), tilting the small crane can make the chassis roller (18) and the support roller (20) contact the ground at the same time, and the small crane can be moved by pushing the push rod (5); In the hatch fixing mechanism, each chassis longitudinal rod (10b) is provided with an eye plate bracket (21) at the other end. The eye plate bracket (21) is connected to an L-shaped connecting piece (22) through an eye plate (8). Multiple eye holes are provided on the eye plate (8). By selecting different eye holes on the eye plate (8) to connect with the eye plate bracket (21), the connection position of the eye plate (8) relative to the eye plate bracket (21) can be adjusted. The eye plate (8) and the L-shaped connecting piece (22) constitute a hatch connector. The hatch connector can be rotated 180° relative to the eye plate bracket (21). For hatch covers with hatch coaming, the hatch connector is installed facing forward, the L-shaped connecting piece (22) is positioned above the outer end of the eye plate (8), and the eye plate bracket (21) is connected to the selected eye hole on the eye plate (8) so that the eye hole on the eye plate (8) is aligned with the hatch cover hole; for sinking hatch covers, the hatch connector is rotated 180° relative to the eye plate bracket (21) and then installed in the opposite direction, the L-shaped connecting piece (22) is positioned below the inner end of the eye plate (8), and the eye plate bracket (21) is connected to the selected eye hole on the eye plate (8) so that the connecting hole of the L-shaped connecting piece (22) is aligned with the hatch cover hole.

2. The multi-functional portable small crane for use inside a cabin according to claim 1, characterized in that, The bottom of the chassis longitudinal rod (10b) is provided with chassis pads (10c).

3. The multi-functional portable small crane for use inside a cabin according to claim 1, characterized in that, The guide pulley (12) is supported by a shaft (14) and an oilless bearing (13).

4. The multi-functional portable small crane for use inside a cabin according to claim 1, characterized in that, An oil mist lubricator (17) is also installed on the boom (2).

5. A method for operating a multi-functional portable small crane for use inside a cabin as described in any one of claims 1-4, characterized in that, The small crane includes a hatch cover lifting mode, a sunken hatch cover lifting mode, and a portable mobile mode. The hatch cover lifting mode includes: setting the small lifting chassis (10) around the hatch cover to be lifted, inserting the straight rod section (2a) of the lifting rod (2) into the lifting rod base (1), and fixing the lifting rod (2) and the lifting rod base (1) with the pin (6); rotating the lifting rod (2) so that the anti-detachment hook (4) is rotated to the top of the hatch cover to be lifted, and locking the slewing bolt (7); the hatch cover to be lifted is a hatch cover, installing the hatch connector in the forward direction, setting the L-shaped connecting piece (22) above the outer end of the eye plate (8), selecting the eye hole on the eye plate (8) to connect with the eye plate bracket (21), aligning the eye hole on the eye plate (8) with the hatch cover hole and locking it with the bolt; starting the pneumatic motor (16), releasing the wire rope (3), connecting the anti-detachment hook (4) to the lifting hole of the hatch cover, tightening the wire rope (3), and lifting the hatch cover; The lifting mode of the sunken hatch includes: setting the small lifting chassis (10) around the hatch to be lifted, inserting the straight rod section (2a) of the lifting rod (2) into the lifting rod base (1), and fixing the lifting rod (2) and the lifting rod base (1) with the pin (6); rotating the lifting rod (2) so that the anti-detachment hook (4) is rotated to the top of the hatch to be lifted, and locking the slewing bolt (7); the hatch to be lifted is a sunken hatch, rotating the same hatch connector 180° relative to the eye plate bracket (21) and installing it in the opposite direction so that the L-shaped connecting piece (22) is set below the inner end of the eye plate (8), selecting the eye hole on the eye plate (8) to connect with the eye plate bracket (21), so that the connecting hole of the L-shaped connecting piece (22) is aligned with the hatch hole and locked with the bolt; starting the pneumatic motor (16), releasing the wire rope (3), connecting the anti-detachment hook (4) to the lifting hole of the hatch, tightening the wire rope (3), and lifting the hatch; The portable movement mode includes: removing the pneumatic motor (16) on the small crane, taking the anti-detachment hook (4) out of the lifting hole and hanging it on the hook buckle (23) of the lifting rod support (2c), then tilting the small crane until the chassis roller (18) and the bracket roller (20) contact the ground, and pushing the push rod (5) to move the small crane.

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