Cargo clamping device
The cargo clamping device designed by hydraulically driven link mechanism solves the problem of fixing binding parts increasing workload and cargo bottom damage during loading and unloading of goods by semi-submersible ships, achieving a fast and reusable clamping effect, reducing the Descent costs and deck damage risk.
Patent Information
- Application Number
- CN202411719372.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-02-18
AI Technical Summary
During the loading and unloading of cargo by semi-submersible ships, existing fixed bindings need to be welded after the cargo is in place, which increases the workload and may cause damage to the deck. At the same time, the design of the fixture is located at the bottom of the cargo under limited draft depth. Risk of increased damage and latency costs.
Design a hydraulically driven linkage cargo clamping device. The clamping arm consists of multiple rods and hydraulic cylinders. Through the control of the hydraulic power source and controller, the clamping surface lifts the fixed cargo after the cargo is in place. The function of ensuring that the highest point of the clamping device is lower than the lowest point of the cargo.
Fast, reusable tying and clamping with semi-submersible ship draft is achieved, avoiding problems such as cargo bottom damage and increased latency costs, while reducing workload and deck damage risks.
Smart Images
Figure CN119459970A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of freight transport, and in particular to a cargo clamping device. Background Art
[0002] A semi-submersible vessel refers to a vessel with a relatively large open cargo deck, a relatively high superstructure or deckhouse or pontoon at the bow or stern, and which is in a semi-submerged state during the loading and unloading of cargo operations.
[0003] The advantage of semi-submersible vessels is that they can load and transport indivisible oversized cargoes, including unpowered ships, oil drilling platforms, large container bridge cranes, floating and non-floating structures, etc. In order to prevent the cargo from shaking during transportation, fixed lashings are generally used to constrain the movement of the cargo. One side of the lashings is welded to the cargo deck of the semi-submersible vessel, and the other side is welded or not welded to the cargo depending on the situation. This fixed lashing method is to design the size, material and layout of the lashings for cargoes of different shapes. This lashing is done after the cargo is loaded and the semi-submersible vessel floats to the designed draft for navigation. If the welding of the fixings is completed before the cargo is loaded, the bottom of the cargo may be damaged because the height of the fixings is higher than the draft of the bottom of the cargo. In addition, if the semi-submersible vessel is required to dive deeper, so that the highest point of the lashings is lower than the lowest point of the cargo, it will obviously increase the diving cost of the semi-submersible vessel, which is not economical.
[0004] However, for some semi-submersible vessels that are fixedly loaded with specific cargoes for operation, welding each time after the cargo is in place will increase the workload. And because the position is the same each time, repeated cutting and welding at the same lashing position may cause damage to the deck. Therefore, it is necessary to consider a fast and reusable lashing clamping device under the condition of limited draft depth of semi-submersible vessels. Summary of the invention
[0005] Based on this, it is necessary to propose a cargo clamping device to address the above problems. The clamping is achieved by using a hydraulically driven connecting rod mechanism. Before the cargo enters the semi-submersible ship, the highest point of the clamping device is still lower than the lowest point of the cargo, which can ensure the safety of the cargo in and out. After the cargo is in place, the clamping surface is raised to fix the cargo. To achieve the above purpose, the technical solution of the present invention is as follows:
[0006] A cargo clamping device, comprising a hydraulic power source and pipelines, a controller and a plurality of clamping arms, wherein the hydraulic power source provides power to the clamping arms under the control of the controller;
[0007] The clamping arm comprises a base, a first rod, a second rod, a third rod and a hydraulic cylinder;
[0008] The base is fixed on a fixed surface, and a first rotating pair is provided at the front end of the base, and the first rotating pair connects the lower end of the first rod and the front end of the base, so that the first rod can rotate around the axis of the first rotating pair; a second rotating pair is provided at the upper end of the first rod, and the second rotating pair connects the upper end of the first rod and one end of the second rod, so that the first rod and the second rod can rotate around the axis of the second rotating pair; a third rotating pair is provided at the other end of the second rod, and the third rotating pair connects the other end of the second rod and the upper end of the third rod, so that the other end of the second rod and the upper end of the third rod can rotate around the axis of the third rotating pair; a fourth rotating pair is provided at the rear end of the base, and the fourth rotating pair connects the lower end of the third rod and the rear end of the base, so that the lower end of the third rod can rotate around the axis of the fourth rotating pair;
[0009] A fifth rotation pair is also provided in the middle of the third rod, and the fifth rotation pair is located between the third rotation pair and the fourth rotation pair. The fifth rotation pair connects the middle of the third rod and one end of the hydraulic pipe, so that the middle of the third rod and one end of the hydraulic cylinder can rotate around the fifth rotation pair; a sixth rotation pair is also provided in the middle of the base, and the sixth rotation pair is located between the first rotation pair and the fourth rotation pair. The sixth rotation pair connects the other end of the hydraulic cylinder and the middle of the base, so that the other end of the hydraulic cylinder can rotate around the sixth rotation pair;
[0010] When the piston of the hydraulic cylinder is in the shortest state, the third rod is nearly parallel to the base, thereby making the second rod and the first rod substantially parallel to the base;
[0011] When the piston of the hydraulic cylinder is at its longest stroke, the axes of the second rod and the third rod are collinear, so that the first rod stands upright.
[0012] Furthermore, it also includes auxiliary hydraulic cylinders located on both sides of the base, one end of the auxiliary hydraulic cylinder is connected to the base through a seventh rotating pair, and the other end of the auxiliary hydraulic cylinder is connected to the first rod through an eighth rotating pair, and the eighth rotating pair is located in the middle of the first rotating pair and the second rotating pair.
[0013] Furthermore, a clamping surface is provided on the outer side of the first rod, and the clamping surface is composed of a softer soft pad and a harder hard pad in between; the sizes and positions of the soft pad and the hard pad are matched according to the clamped goods; when the clamping surface is not in contact with the goods, neither the soft pad nor the hard pad is deformed, and the soft pad in a free state is higher than the hard pad in a free state; when the clamping surface begins to come into contact with the goods, the soft pad is compressed first, and when the soft pad is compressed to the design value, the hard pad comes into contact with the goods.
[0014] Furthermore, the position of the first rotation pair is higher than that of the fourth rotation pair.
[0015] Furthermore, the first rotating pair is provided with a sensor, which can transmit the rotation angle of the first rotating pair back to the controller via a data line.
[0016] Furthermore, the number of the clamping arms is an even number, and they are arranged on both sides of the goods. When the goods are positioned, the clamping arms corresponding to the two sides rotate and rise at the same time to clamp the goods. The implementation of the embodiment of the present invention will have the following beneficial effects:
[0017] The clamping mechanism driven by the connecting rod mechanism can achieve the purpose of making the highest point of the clamping device lower than the lowest point of the cargo, thereby avoiding possible damage to the bottom of the cargo. It is a fast and reusable lashing clamping device under the condition of limited draft depth of semi-submersible ships. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0019] in:
[0020] Figure 1 It is a three-dimensional schematic diagram of the structure in the clamping state in a specific embodiment of the present invention.
[0021] Figure 2 It is a three-dimensional schematic diagram of the structure in the released state in a specific embodiment of the present invention.
[0022] Figure 3 It is a schematic side view of the structure in a released state in a specific embodiment of the present invention.
[0023] Figure 4 It is a schematic side view of the structure in a clamping state in a specific embodiment of the present invention.
[0024] Figure 5It is a simplified side view of the structure in a clamping state in a specific embodiment of the present invention.
[0025] Figure 6 It is a simplified side view of the structure in an intermediate state in a specific embodiment of the present invention.
[0026] Figure 7 It is a simplified side view of the structure in the released state in a specific embodiment of the present invention. DETAILED DESCRIPTION
[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0028] The invention discloses a cargo clamping device, which is composed of a hydraulic power source and pipelines, a controller and a plurality of clamping arms. The hydraulic power source provides power for the clamping arms under the control of the controller.
[0029] like Figure 1 As shown in Figure 1 , the clamping arm includes a base 10, a first rod 11, a second rod 12, a third rod 13 and a hydraulic cylinder 14.
[0030] When the clamping arm is in the released state, the rod 11 is kept substantially horizontal to avoid the bottom of the cargo; in a specific embodiment, Figure 2-3 As shown, the first rod 11 as a clamping surface can be completely horizontal. When the clamping arm is in the clamping state, the first rod 11 can be basically vertical. Of course, the clamping pad on its upper part should be adapted to the shape of the goods; in a specific embodiment, as Figure 1 As shown, the first rod 11 can be completely vertical as a clamping surface.
[0031] like Figure 4As shown, the base 10 is fixed on a fixed surface, and a first rotating pair 21 is provided at the front end of the base 10, and the first rotating pair 21 connects the lower end of the first rod 11 and the front end of the base 10, so that the first rod 11 can rotate around the axis of the first rotating pair 21; a second rotating pair 22 is provided at the upper end of the first rod 11, and the second rotating pair 22 connects the upper end of the first rod 11 and one end of the second rod 12, so that the first rod 11 and the second rod 12 can rotate around the axis of the second rotating pair 22; a third rotating pair 23 is provided at the other end of the second rod 12, and the third rotating pair 23 connects the other end of the second rod 12 and the upper end of the third rod 13, so that the other end of the second rod 12 and the upper end of the third rod 13 can rotate around the axis of the third rotating pair 23; a fourth rotating pair 24 is provided at the rear end of the base 10, and the fourth rotating pair 24 connects the lower end of the third rod 13 and the rear end of the base 10, so that the lower end of the third rod 13 can rotate around the axis of the fourth rotating pair 24.
[0032] A fifth rotating pair 25 is also provided in the middle of the third rod 13, and the fifth rotating pair 25 is located in the middle of the third rotating pair 23 and the fourth rotating pair 24. The fifth rotating pair 25 connects the middle of the third rod 13 and one end of the hydraulic cylinder 14, so that the middle of the third rod 13 and one end of the hydraulic cylinder 14 can rotate around the fifth rotating pair 25; a sixth rotating pair 26 is also provided in the middle of the base 10, and the sixth rotating pair 26 is located in the middle of the first rotating pair 21 and the fourth rotating pair 24. The sixth rotating pair 26 connects the other end of the hydraulic cylinder 14 and the middle of the base 10, so that the other end of the hydraulic cylinder 14 can rotate around the sixth rotating pair 26.
[0033] The base 10 is fixed on the cargo deck by welding. The base bears the force after clamping, so its structure should be firm.
[0034] When the piston of the hydraulic cylinder 10 is in the shortest state, the third rod 13 is nearly parallel to the base 10, so that the second rod 12 and the first rod 11 are basically parallel to the base 10, that is, they are in a released state.
[0035] When the piston of the hydraulic cylinder 10 is at its longest stroke, the axes of the second rod 12 and the third rod 13 are collinear, so that the first rod 11 stands upright, that is, in a clamping state.
[0036] To further clarify the structure, please Figure 4 Based on reference Figure 5-7 . Figure 5-7 The relative positional relationship among the base 10, the first rod 11, the second rod 12, the third rod 13 and the hydraulic cylinder 14 in the clamping state, the intermediate state and the release state is shown in the form of a simplified diagram. Figure 7 For ease of reading, no numbers are used.
[0037] Furthermore, it also includes an auxiliary hydraulic cylinder 15 located on both sides of the base 10, one end of the auxiliary hydraulic cylinder 15 is connected to the base 10 through the seventh rotation pair 27, and the other end of the auxiliary hydraulic cylinder 15 is connected to the first rod 11 through the eighth rotation pair 28, and the eighth rotation pair 28 is located between the first rotation pair 21 and the second rotation pair 22.
[0038] Since the force of the hydraulic cylinder is close to the dead point when in the released state, in order to improve the stability during lifting, auxiliary hydraulic cylinders 15 are added on both sides of the base 10 to assist the first rod 11 in increasing the lifting power when it is close to the horizontal position. This setting can be selected according to the specific situation. In the specific embodiment of the present invention, only Figure 3 and Figure 4 The installation position of the auxiliary hydraulic cylinder 15 is shown in FIG.
[0039] Furthermore, a clamping surface is provided on the outer side of the first rod 11, and the clamping surface is composed of a softer soft pad 111 and a harder hard pad 112 in between; the sizes and positions of the soft pad 111 and the hard pad 112 are matched according to the clamped goods; when the clamping surface is not in contact with the goods, the soft pad 111 and the hard pad 112 are not deformed, and the soft pad 111 in the free state is higher than the hard pad 112 in the free state; when the clamping surface begins to come into contact with the goods, the soft pad 111 is compressed first, and when the soft pad 111 is compressed to the design value, the hard pad 112 comes into contact with the goods.
[0040] In this specific embodiment, only one soft pad 111 and one hard pad 112 are schematically provided. Obviously, the number, type and position of the soft pad 111 and the hard pad 112 can be adaptively set according to the shape of the cargo. Furthermore, there can be multiple pads with different hardness to better adapt to the shape of the cargo. These means are all within the scope of protection of the present invention.
[0041] Furthermore, the first rotational pair 21 is located higher than the fourth rotational pair 22 .
[0042] Furthermore, the first rotational pair 21 is provided with a sensor, which can transmit the rotation angle of the first rotational pair 21 back to the controller via a data line.
[0043] By adding an angle sensor to the first rotation joint 21, the control of the clamping arm can be made more precise, which is meaningful for certain fragile goods.
[0044] Furthermore, the number of the clamping arms is an even number and is arranged on both sides of the goods. When the goods are positioned, the corresponding clamping arms on both sides rotate and rise at the same time to clamp the goods.
[0045] For long and narrow goods, setting an even number of clamping arms can better position and secure the goods.
[0046] The technical features of the above embodiments may 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.
[0047] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.
Claims
1. A cargo clamping device, characterized in that: It is composed of a hydraulic power source and pipelines, a controller and a plurality of clamping arms, wherein the hydraulic power source provides power to the clamping arms under the control of the controller; The clamping arm comprises a base, a first rod, a second rod, a third rod and a hydraulic cylinder; The base is fixed on a fixed surface, and a first rotating pair is provided at the front end of the base, and the first rotating pair connects the lower end of the first rod and the front end of the base, so that the first rod can rotate around the axis of the first rotating pair; a second rotating pair is provided at the upper end of the first rod, and the second rotating pair connects the upper end of the first rod and one end of the second rod, so that the first rod and the second rod can rotate around the axis of the second rotating pair; a third rotating pair is provided at the other end of the second rod, and the third rotating pair connects the other end of the second rod and the upper end of the third rod, so that the other end of the second rod and the upper end of the third rod can rotate around the axis of the third rotating pair; a fourth rotating pair is provided at the rear end of the base, and the fourth rotating pair connects the lower end of the third rod and the rear end of the base, so that the lower end of the third rod can rotate around the axis of the fourth rotating pair; A fifth rotation pair is also provided in the middle of the third rod, and the fifth rotation pair is located between the third rotation pair and the fourth rotation pair. The fifth rotation pair connects the middle of the third rod and one end of the hydraulic pipe, so that the middle of the third rod and one end of the hydraulic cylinder can rotate around the fifth rotation pair: a sixth rotation pair is also provided in the middle of the base, and the sixth rotation pair is located between the first rotation pair and the fourth rotation pair. The sixth rotation pair connects the other end of the hydraulic cylinder and the middle of the base, so that the other end of the hydraulic cylinder can rotate around the sixth rotation pair; When the piston of the hydraulic cylinder is in the shortest state, the third rod is nearly parallel to the base, thereby making the second rod and the first rod substantially parallel to the base; When the piston of the hydraulic cylinder is at its longest stroke, the axes of the second rod and the third rod are collinear, so that the first rod stands upright.
2. The cargo clamping device according to claim 1, characterized in that: It also includes auxiliary hydraulic cylinders located on both sides of the base, one end of the auxiliary hydraulic cylinder is connected to the base through a seventh rotation pair, and the other end of the auxiliary hydraulic cylinder is connected to the first rod through an eighth rotation pair, and the eighth rotation pair is located between the first rotation pair and the second rotation pair.
3. The cargo clamping device according to claim 1, characterized in that: A clamping surface is provided on the outer side of the first rod, and the clamping surface is composed of a softer soft pad and a harder hard pad; the size and position of the soft pad and the hard pad are matched according to the clamped goods; when the clamping surface is not in contact with the goods, the soft pad and the hard pad are not deformed, and the soft pad in a free state is higher than the hard pad in a free state; When the clamping surface begins to come into contact with the goods, the soft pad is compressed first, and when the soft pad is compressed to a designed value, the hard pad comes into contact with the goods.
4. The cargo clamping device according to claim 1, characterized in that: The first rotation pair is located higher than the fourth rotation pair.
5. The cargo clamping device according to claim 1, characterized in that: The first rotating pair is provided with a sensor, which can transmit the rotation angle of the first rotating pair back to the controller through a data line.
6. The cargo clamping device according to claim 1, characterized in that: The number of the clamping arms is an even number and they are arranged on both sides of the goods. When the goods are positioned, the corresponding clamping arms on both sides rotate and rise at the same time to clamp the goods.