Crane for offshore bulk cargo ship operation

Abstract

The utility model relates to a crane for marine bulk cargo ship operation in the field of ship cranes, which comprises a crane, a steel wire rope and a lifting hook, an elastic piece is arranged on the inner side of the lifting hook, a limiting sliding column is fixed at the lower end of the elastic piece and vertically penetrates through the lifting hook in a sliding mode, and a connecting frame is fixed at the lower end of the limiting sliding column. The connecting frame extends upwards to the upper side of an opening of the lifting hook, a limiting rod is rotationally installed at the end, close to the upper side of the opening, of the lifting hook, a torsional spring is connected between the limiting rod and the lifting hook, and the pressing rod is located over the side, close to the lifting hook, of the limiting rod. When the upper end of the elastic piece is pressed, the elastic piece makes contact with the inner surface of the lifting hook, the pressing rod moves to the opening, by means of the structure, through the elastic force effect of the elastic piece and the pressure effect of goods, the limiting sliding column, the connecting frame and the pressing rod are matched, and compared with an existing manual operation clamping rod mode, goods can be loaded and unloaded more conveniently.

Description

Technical Field

[0001] This utility model relates to a crane for operating bulk carriers at sea, and particularly to a crane for operating bulk carriers at sea that is applied in the field of ship cranes. Background Technology

[0002] A crane, also known as a marine crane or marine hoist, is a type of large deck machinery on ships. It is a piece of equipment used for loading and unloading cargo. Hydraulic cranes are a common type of loading and unloading equipment used on ships, characterized by their large size and load capacity.

[0003] Hooks are the most common type of lifting equipment in lifting machinery. They are frequently used on ships and are usually suspended from the wire rope of the lifting mechanism by means of pulley blocks and other components.

[0004] A search revealed, for example, a specification of a ship crane disclosed in patent publication number CN211004201U, which includes a hook, a connecting block fixedly installed at the upper end of the hook, a lifting rope connected to the connecting block, and two symmetrical auxiliary hooks at the upper end of the hook; a locking rod is provided at the hook end of the hook, and a through hole and a connecting groove are provided on the hook, with the locking rod threadedly engaged with the connecting groove through the through hole, which is more stable.

[0005] Based on the above search and combined with the existing technology, although the hook of the existing crane similar to the above-disclosed crane can play an effective safety protection role and prevent the cargo from swaying and falling off the hook, the manual connection method of the clamp makes the loading and unloading operation more troublesome and reduces the efficiency of cargo loading and unloading. Therefore, a crane for offshore bulk carrier operations is proposed to improve the above problems. Utility Model Content

[0006] The technical problem that this utility model aims to solve in view of the above-mentioned prior art is that the clamp connection method at the hook opening makes loading and unloading operations more troublesome and reduces the efficiency of cargo loading and unloading.

[0007] To solve the above problems, this utility model provides a crane for operating on a bulk carrier at sea, including a crane, a wire rope and a hook;

[0008] A spring is provided on the inside of the hook, and a limit slide is fixed at the lower end of the spring. The limit slide slides vertically through the hook.

[0009] The lower end of the limiting slide is fixed with a connecting frame, which extends upward to the upper side of the opening of the hook and is fixed with a pressure rod;

[0010] When the upper end of the spring is not under pressure, the spring does not fit against the inner surface of the hook, and the pressure bar is located on the upper side of the opening;

[0011] When the upper end of the spring is subjected to pressure, the spring contacts the inner surface of the hook, and the pressure rod moves to the opening.

[0012] In the aforementioned crane used for bulk carrier operations at sea, the elastic force of the spring clips and the pressure of the cargo, combined with the limiting slide, connecting frame and pressure bar, make it easier to load and unload cargo compared to the existing manual operation levers, and also facilitates the loading and unloading of cargo by the hook.

[0013] As a further improvement of this application, the inner surface of the hook is provided with a groove that is adapted to the sliding of the spring piece. The spring piece is located inside the groove. On the one hand, the groove can be used to limit the spring piece, and on the other hand, it makes it difficult for the cargo rope to get stuck between the spring piece and the hook.

[0014] As a further improvement of this application, a limit rod is rotatably installed at the end of the hook near the upper side of the opening, and a torsion spring is connected between the limit rod and the hook. The pressure rod is located directly above the limit rod near the hook. When loading goods, the limit rod can rotate downward under the pressure of the pressure rod, thereby closing the opening of the hook. Compared with the existing manual operation of the lever, it is more convenient for loading and unloading goods.

[0015] As a further improvement of this application, a rain shield is fixedly sleeved on the upper end of the hook, making the hook less susceptible to erosion by rainwater.

[0016] As a further improvement of this application, the connecting frame is vertically slidably sleeved on the upper end of the hook, and a limiting slide rod is vertically fixed at the upper end of the connecting frame. The limiting slide rod slides vertically through the rain cover, and the limiting slide rod is combined with the strength of the rain cover to make it less prone to deformation.

[0017] As a further improvement of this application, a laser emitter that emits a beam downwards is embedded at the bottom of the limiting slide column. During the process of the crane moving the empty hook above the cargo to be loaded via the wire rope, the laser emitter can be used to quickly and accurately position the crane directly above the cargo to be loaded.

[0018] As a further improvement of this application, protective baffles are symmetrically arranged on both sides of the hook. The protective baffles are fixed to the side ends of the limiting slide column. The protective baffles rise and fall synchronously with the limiting slide column, which can block the gap between the hook and the spring when the hook is not lifting the goods, so that external impurities are not easy to fall into the gap and prevent the spring from moving down when lifting the goods.

[0019] In summary, when no goods are being lifted, the spring clip does not adhere to the inner surface of the hook due to its own elastic force. At this time, the limiting rod is in the open hook opening state under the elastic force of the torsion spring, making it convenient to hook the goods' lanyard through the hook opening. When lifting goods, the spring clip comes into contact with the inner surface of the hook under the tension of the goods, and moves downward along with the pressure rod through the limiting slide and connecting frame. The downward-moving pressure rod presses down on the limiting rod, causing the limiting rod to rotate downward, thereby closing the hook opening. Compared with the existing manual operation lever, this method is more convenient for loading and unloading goods. After the goods are lifted to the placement position, the spring clip is no longer under the tension of the goods. At this time, the spring clip returns to its original position under its own elastic force. The limiting rod is in the open hook opening state under the elastic force of the torsion spring, making it convenient to remove the goods' lanyard from the hook opening. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the hook without cargo suspended in the embodiment of this application;

[0022] Figure 3 This is a structural schematic diagram of the hook suspending cargo in an embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the hook according to an embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the structure of the spring in an embodiment of this application.

[0025] Explanation of the labels in the diagram:

[0026] 1. Crane, 2. Wire rope, 3. Hook, 301 groove, 4. Spring, 5. Limiting slide, 6. Connecting frame, 7. Pressure rod, 8. Limiting rod, 9. Rain shield, 10. Limiting slide, 11. Protective baffle, 12. Laser emitter. Detailed Implementation

[0027] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0028] First implementation method:

[0029] Figure 1-5 The diagram shows a crane for operating a bulk carrier at sea, comprising a crane 1, a wire rope 2, and a hook 3. One end of the wire rope 2 is fixed to the crane 1, and the other end is fixed to the hook 3.

[0030] The hook 3 has a spring piece 4, such as an arc-shaped stainless steel piece, on its inner side. The lower end of the spring piece 4 is fixed with a limiting slide post 5. The limiting slide post 5 slides vertically through the hook 3. The lower end of the limiting slide post 5 is fixed with a connecting frame 6. The connecting frame 6 extends upward to the upper side of the opening of the hook 3 and is fixed with a pressure rod 7.

[0031] To better close the opening of the hook 3, a limiting rod 8 is rotatably installed at the upper end of the hook 3 near the opening, and a torsion spring is connected between the limiting rod 8 and the hook 3. The pressure rod 7 is located directly above the limiting rod 8 on the side near the hook 3. When loading goods, the limiting rod 8 can rotate downward under the pressure of the pressure rod 7, thereby closing the opening of the hook 3. Compared with the existing manual operation of the locking rod, it is more convenient for loading and unloading goods.

[0032] Based on the above structural arrangement, when no goods are being lifted, the spring piece 4 does not adhere to the inner surface of the hook 3 under its own elastic force. At this time, the limiting rod 8 is in the open state of the hook 3 under the elastic force of the torsion spring, making it convenient to hook the goods' rope from the opening of the hook 3. When lifting goods, the spring piece 4 contacts the inner surface of the hook 3 under the pulling force of the goods, and moves down with the pressure rod 7 through the limiting slide 5 and the connecting frame 6. The downward-moving pressure rod 7 presses down on the limiting rod 8, causing the limiting rod 8 to rotate downward, thereby closing the opening of the hook 3. Compared with the existing manual operation lever, this method is more convenient for loading and unloading goods. After the goods are lifted to the placement position, the spring piece 4 is no longer under the pulling force of the goods. At this time, the spring piece 4 returns to its original position under its own elastic force. At this time, the limiting rod 8 is in the open state of the hook 3 under the elastic force of the torsion spring, making it convenient to remove the goods' rope from the opening of the hook 3.

[0033] The inner surface of the hook 3 is provided with a groove 301 that is adapted to slide with the spring piece 4. The spring piece 4 is located inside the groove 301. On the one hand, the groove 301 can be used to limit the spring piece 4, and on the other hand, it makes it difficult for the cargo rope to get stuck between the spring piece 4 and the hook 3.

[0034] The upper end of the hook 3 is fixedly fitted with a rain shield 9, which makes the hook 3 less susceptible to erosion by rainwater. In addition, the connecting frame 6 is vertically slidably fitted onto the upper end of the hook 3. The upper end of the connecting frame 6 is vertically fixed with a limiting slide rod 10, which slides vertically through the rain shield 9. The limiting slide rod 10, together with the rain shield 9, can further enhance the strength of the connecting frame 6 and make it less prone to deformation.

[0035] Considering that it is difficult for staff to observe the position of the hook 3 relative to the goods from the ground, this solution has a laser emitter 12 embedded at the bottom of the limiting slide column 5, which emits a beam of light downwards. The laser emitter 12 can be of model AX-5. During the process of the crane 1 moving the empty hook 3 to the top of the goods to be loaded via the wire rope 2, the laser emitter 12 can be used to quickly and accurately position it directly above the goods to be loaded.

[0036] Second implementation method:

[0037] Figure 1 , 2 3 and Figure 5 As shown, protective baffles 11 are symmetrically arranged on opposite sides of the hook 3. The protective baffles 11 are fixed to the side ends of the limiting slide column 5. The protective baffles 11 rise and fall synchronously with the limiting slide column 5. They can block the gap between the hook 3 and the spring piece 4 when the hook 3 is not lifting the goods, so that external impurities are not easy to fall into the gap and prevent the spring piece 4 from moving down when lifting the goods.

[0038] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A kind of offshore bulk carrier operation with kelly crane, including crane (1), wire rope (2) and hook (3), it is characterized in that: The inner side of the hook (3) is provided with spring leaf (4), the lower end of the spring leaf (4) is fixed with limit slide column (5), the limit slide column (5) vertically slides through hook (3); The lower end of the limit slide column (5) is fixed with connecting frame (6), the connecting frame (6) extends to the opening upper side of hook (3) upwards, and is fixed with pressure rod (7); When the upper end of the spring leaf (4) is not subjected to pressure, the spring leaf (4) is not fitted with the inner surface of the hook (3), and the pressure rod (7) is located in the opening upper side; When the upper end of the spring leaf (4) is subjected to pressure, the spring leaf (4) is in contact with the inner surface of the hook (3), and the pressure rod (7) moves to the opening.

2. A cargo handling crane for a marine bulk carrier according to claim 1, characterised in that: The inner surface of the hook (3) is provided with groove (301) that is slidably fitted with spring leaf (4).

3. A cargo handling crane for a marine bulk carrier according to claim 1, characterized in that: The end of the hook (3) close to the opening upper side is rotatably installed with limit rod (8), and limit rod (8) is connected with hook (3) between torsion spring, and the pressure rod (7) is located directly above the side of limit rod (8) close to hook (3).

4. A cargo handling crane for a marine bulk carrier according to claim 1, characterized in that: The upper end of the hook (3) is fixed with rain shield (9) of sleeve.

5. A cargo handling crane for a marine bulk carrier according to claim 4, characterised in that: The upper end of the hook (3) is vertically slidably sleeved with the connecting frame (6), the upper end of the connecting frame (6) is vertically fixed with limit slide rod (10), and the limit slide rod (10) vertically slides through rain shield (9).

6. A cargo handling crane for a marine bulk carrier according to claim 1, characterized in that: The bottom end of the limit slide column (5) is embedded with laser emitter (12) that emits light beam towards the lower side.

7. A cargo handling crane for a marine bulk carrier according to any one of claims 1 to 6, characterized in that: The opposite sides of the hook (3) are symmetrically provided with protective baffle (11), and the protective baffle (11) is fixed with the side end of the limit slide column (5).

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