Container ship resistance reduction device giving consideration to cooling of cold box

Abstract

The invention belongs to the technical field of ships, and particularly relates to a container ship resistance reduction device capable of giving consideration to cooling of a cold box, which comprises a binding bridge, a middle shielding baffle, side shielding baffles, connecting lug plates, bolts, nuts, ventilation holes and a connecting relation thereof. By arranging the middle shielding baffle and the side shielding baffles on the two sides of the middle shielding baffle, turbulent flow formed by air flowing in the longitudinal direction of the ship in the longitudinal gap of the container can be reduced, the air resistance of the ship is reduced, and therefore fuel consumption of the ship is reduced; the ventilation holes are formed in the lower portion of the middle shielding baffle, the necessary transverse ventilation area can be provided for the longitudinal gap, the necessary heat dissipation requirement of the refrigerated container is met, and the necessary working environment is provided for a refrigeration compressor of the refrigerated container. The side shielding baffles are designed in a blocking and detachable mode, a larger transverse ventilation area which can be adjusted according to needs can be provided for the longitudinal gaps, and a better heat dissipation effect is provided for the refrigerated container.

Description

Technical Field

[0001] The invention relates to the technical field of large container transport ships with lashing bridges, and in particular to a container ship drag reduction device that takes into account the heat dissipation of cold boxes. Background Art

[0002] On large container transport ships, a large number of containers are stacked above the hatch covers; in the longitudinal gaps between the containers, lashing bridges need to be arranged to secure the containers on the hatch covers to prevent the containers from falling or capsizing.

[0003] Due to the existence of longitudinal gaps between containers, when a container ship is traveling, air flowing in the opposite direction of the container ship's travel will form turbulence at the longitudinal gaps, significantly increasing the air resistance of the container ship, thereby directly leading to an increase in the container ship's fuel consumption.

[0004] On the other hand, container ships with refrigerated containers in the cabin and on the hatch cover must provide sufficient air flow for the heat dissipation of the refrigerated compressors of the refrigerated containers to prevent the refrigeration compressors from overheating and causing them to stop working or be damaged. The hot air emitted by the refrigerated containers in the cabin will be discharged into the longitudinal gap of the container by the fan; the hot air emitted by the refrigerated containers on the hatch cover is also in the longitudinal gap of the container; so there must be enough air flow in the longitudinal gap of the container to meet the heat dissipation requirements.

[0005] In the patent (publication number KR1020200033686A), a shielding baffle installed at the side column of the lashing bridge is proposed; the shielding baffle is connected to the lashing bridge column by adhesive; the baffle is divided into two parts, upper and lower. This type of baffle is attached to the lashing bridge by adhesive, taking into account maintainability; however, the baffle will block the air flow in the longitudinal gap of the container, affecting heat dissipation; and it cannot contribute to the overall strength of the lashing bridge.

[0006] In the patent (publication number KR1020190103709A), a longitudinally retractable side baffle mechanism is proposed; its main body is a sandwich plate fixed on the side column of the lashing bridge (three layers in total, two outer layers are fixed, and the middle layer is movable), and the movable sandwich can be controlled by a worm gear mechanism to control its longitudinal expansion and contraction, thereby realizing the adjustment of the longitudinal gap between the baffle and the container. This type of baffle mechanism is relatively complex, with high manufacturing and maintenance costs, and its increased weight is also large; the lateral thickness occupies a large space, which has an adverse effect on the design of the lashing bridge, and cannot participate in the overall strength of the lashing bridge. Summary of the invention

[0007] The purpose of the present invention is to solve the technical problems existing in the background technology. To this end, a container ship drag reduction device that takes into account the heat dissipation of the refrigerated box is provided, which reduces the longitudinal gap between the containers so that the air flow along the longitudinal direction of the ship does not form obvious turbulence at the lashing bridge, thereby reducing the air resistance of the container ship; at the same time, heat dissipation openings of sufficient area are arranged at the bottom of the device to form sufficient lateral air flow at the longitudinal gap of the container to ensure the heat dissipation requirements of the refrigerated container.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0009] A container ship drag reduction device that takes into account the heat dissipation of a cold box, characterized in that it comprises a lashing bridge, and shielding baffle assemblies are fixedly connected to both ends of the lashing bridge;

[0010] The lashing bridge is located in the longitudinal gap between the containers and is fixedly installed on the container ship;

[0011] The shielding shutter assembly is located at the end of the longitudinal gap between the containers.

[0012] The following is a technical solution further defined in the present invention, wherein the lashing bridge comprises side columns and a passage platform, wherein the passage platform is arranged along the transverse direction of the container ship, and a plurality of side columns are fixedly connected to both sides of the passage platform, and the side columns are fixedly installed on the container ship.

[0013] The following is a technical solution further defined by the present invention, wherein the shielding baffle assembly includes an intermediate shielding baffle and side shielding baffles, wherein the intermediate shielding baffle is fixedly arranged between two side columns at the end of the lashing bridge, and the side shielding baffles are provided in multiple pieces and are fixedly arranged on both sides of the side columns at the end of the lashing bridge; ventilation holes are opened on the intermediate shielding baffle.

[0014] The following is a technical solution further defined in the present invention, wherein the shielding baffle assembly also includes connecting ear plates and bolts and nuts, and the side shielding baffle is connected to the side column through the connecting ear plates and bolts and nuts; wherein the side shielding baffle and the connecting ear plates are fixedly connected by bolts and nuts, the connecting ear plates are welded to the sides of the side columns, the height of the connecting ear plates is not more than 2 meters from the passage platform below them, and the spacing between the connecting ear plates is 1 meter.

[0015] The following is a technical solution further defined by the present invention, wherein the intermediate shielding baffle is welded to the side column.

[0016] The following is a technical solution further limited by the present invention, in which the height of the intermediate shielding baffle is equal to the height of the side column.

[0017] The following is a technical solution further defined by the present invention, in which the height of the side shielding baffle is equal to the height of the side column.

[0018] The following is a technical solution further defined by the present invention, wherein the longitudinal gap between the side shielding baffle and the container is 150 mm-400 mm.

[0019] The following is a technical solution further defined by the present invention, wherein the ventilation holes are located below the middle shielding baffle, the ventilation holes are configured as oval holes, and the number of the ventilation holes is 1 or 2.

[0020] The following is a technical solution further limited by the present invention, wherein the intermediate shielding baffle is made of carbon steel.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] The present invention provides a middle shielding baffle and side shielding baffles on both sides thereof, thereby reducing turbulence formed by air flowing along the longitudinal direction of the ship at the longitudinal gap of the container, reducing the air resistance of the ship, and thus reducing the fuel consumption of the ship; the middle shielding baffle participates in the overall strength of the lashing bridge, and can reduce the overall weight; ventilation holes are provided below the middle shielding baffle, which can provide necessary transverse ventilation area for the longitudinal gap, meet the necessary heat dissipation requirements of the refrigerated container, and provide the necessary working environment for the refrigeration compressor of the refrigerated container; the side shielding baffles are designed to be divided into blocks and detachable, which can provide a larger transverse ventilation area that can be adjusted as needed for the longitudinal gap, provide a better heat dissipation effect for the refrigerated container, and provide a better working environment for the refrigeration compressor of the refrigerated container, and the side shielding baffles on both sides have a simple structure, low cost, and are easy to use and maintain, and do not occupy the transverse space of the hull.

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 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.

[0025] Figure 1 2 is a schematic diagram of a top view of the structure of the drag reduction device of the present invention installed on a container ship;

[0026] Figure 2 yes Figure 1 A magnified view of the local structure of the middle circle;

[0027] Figure 3 It is a side structural schematic diagram of the drag reduction device of the present invention installed in the longitudinal gap between containers.

[0028] Reference numerals: 1. container ship; 2. container; 3. refrigerated container on hatch cover; 4. refrigerated container in cabin; 5. longitudinal gap between containers; 6. hatch cover; 7. fan; 8. refrigeration compressor;

[0029] 10. Lashing bridge; 11. Side pillars; 12. Passage platform;

[0030] 21. Middle shielding baffle; 22. Side shielding baffle; 23. Connecting ear plate; 24. Bolts and nuts; 25. Ventilation hole. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0032] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 a limitation on the present invention.

[0033] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0034] like Figure 1-3 As shown, a drag reduction device for a container ship that takes into account the heat dissipation of a cold box is provided, and the drag reduction device is installed on a container ship 1.

[0035] like Figure 3As shown, a container ship 1 is provided with a container 2, a refrigerated container 3 on a hatch cover 6, a refrigerated container 4 in a cabin, a hatch cover 6, a fan 7 and a refrigeration compressor 8. Among them, the refrigerated container 4 in the cabin is located below the hatch cover 6, the refrigerated container 3 on the hatch cover 6 is located above the hatch cover 6, and the container 2 is stacked above the refrigerated container 3 on the hatch cover 6. The refrigeration compressor 8 is used to refrigerate the refrigerated container 3 on the hatch cover 6 and the refrigerated container 4 in the cabin, and the fan 7 is used to discharge the heat released by the refrigeration compressor 8 in the cabin to the outside of the cabin. After the containers 2 are stacked, there is a longitudinal gap 5 between the containers 2.

[0036] A container ship drag reduction device that takes into account the heat dissipation of a cold box includes a lashing bridge 10, and shielding baffle assemblies are fixedly connected to both ends of the lashing bridge 10. The lashing bridge 10 is located in the longitudinal gap 5 between the containers and the lashing bridge 10 is fixedly installed on the container ship 1. The shielding baffle assemblies are located at the ends of the longitudinal gap 5 between the containers.

[0037] The lashing bridge 10 includes side columns 11 and a passage platform 12 , wherein the passage platform 12 is arranged along the transverse direction of the container ship 1 , and both sides of the passage platform 12 are fixedly connected to multiple side columns 11 , and the side columns 11 are fixedly installed on the container ship 1 .

[0038] The shielding baffle assembly includes an intermediate shielding baffle 21, a side shielding baffle 22, a connecting ear plate 23 and bolts and nuts 24. The intermediate shielding baffle 21 is welded between the two side columns 11 at the ends of the lashing bridge 10. The intermediate shielding baffle 21 is welded to the lashing bridge 10, and can participate in the overall strength of the lashing bridge 10. As a part of the overall strength of the lashing bridge 10, the overall weight is reduced. The intermediate shielding baffle 21 is made of ordinary carbon steel or high-strength carbon steel. The height of the intermediate shielding baffle 21 is equal to the height of the side column 11.

[0039] The side shielding baffles 22 are arranged on both sides of the side columns 11 at the ends of the lashing bridge 10. The side shielding baffles 22 can be installed, removed or replaced in blocks, and the ventilation area can be flexibly adjusted. It is simple, reliable and easy to operate, and does not occupy horizontal space.

[0040] The side shielding baffle 22 is connected to the side column 11 through the connecting ear plate 23 and the bolts and nuts 24; wherein, the side shielding baffle 22 and the connecting ear plate 23 are fixedly connected by the bolts and nuts 24, the connecting ear plate 23 is welded to the side of the side column 11, and the height of the connecting ear plate 23 is not more than 2 meters from the passage platform 12 below it, so as to facilitate personnel to operate the bolts and nuts 24 connected thereto. The spacing between the connecting ear plates 23 is about 1 meter. The height of the side shielding baffle 22 is equal to the height of the side column 11. The longitudinal gap between the side shielding baffle 22 and the container is 150mm-400mm.

[0041] If necessary, the side shielding baffles 22 on both sides can be partially or completely removed to increase the transverse ventilation area at the longitudinal gap.

[0042] The middle shielding baffle 21 is provided with ventilation holes 25, which are arranged below the middle shielding baffle 21 to increase the transverse ventilation area at the longitudinal gap. The ventilation holes 25 are arranged as oval holes, that is, the upper and lower ends of the ventilation holes 25 should be semicircular to reduce the stress concentration of the middle shielding baffle 21 at the ventilation holes 25; and the number of ventilation holes 25 is 1 or 2, and the area of ​​the ventilation holes 25 is calculated according to the ventilation volume required by the refrigerated container.

[0043] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above disclosed methods and technical contents without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A container ship drag reduction device that takes into account the heat dissipation of cold boxes, characterized in that: It includes a lashing bridge, with shielding baffle assemblies fixedly connected to both ends of the lashing bridge; The lashing bridge is located in the longitudinal gap between the containers and is fixedly installed on the container ship; The shielding shutter assembly is located at the end of the longitudinal gap between the containers.

2. A container ship drag reduction device taking into account the heat dissipation of cold boxes as claimed in claim 1, characterized in that: The lashing bridge comprises side columns and a passage platform, wherein the passage platform is arranged along the transverse direction of the container ship, and both sides of the passage platform are fixedly connected to a plurality of side columns, and the side columns are fixedly installed on the container ship.

3. A container ship drag reduction device taking into account the heat dissipation of cold boxes as claimed in claim 2, characterized in that: The shielding baffle assembly includes a middle shielding baffle and side shielding baffles, wherein the middle shielding baffle is fixedly arranged between two side columns at the end of the lashing bridge, and the side shielding baffles are provided in multiple pieces and fixedly arranged on both sides of the side columns at the end of the lashing bridge; ventilation holes are opened on the middle shielding baffle.

4. A container ship drag reduction device taking into account the heat dissipation of cold boxes as claimed in claim 3, characterized in that: The shielding baffle assembly also includes connecting ear plates and bolts and nuts, and the side shielding baffles are connected to the side columns through the connecting ear plates and bolts and nuts; wherein the side shielding baffles and the connecting ear plates are fixedly connected by bolts and nuts, the connecting ear plates are welded to the sides of the side columns, the height of the connecting ear plates is not more than 2 meters from the passage platform below them, and the spacing between the connecting ear plates is 1 meter.

5. A container ship drag reduction device taking into account the heat dissipation of cold boxes as claimed in claim 3, characterized in that: The middle shielding baffle is welded to the side column.

6. A container ship drag reduction device taking into account the heat dissipation of cold boxes as claimed in claim 3, characterized in that: The height of the intermediate shielding baffle is equal to the height of the side column.

7. A container ship drag reduction device taking into account the heat dissipation of cold boxes as claimed in claim 3, characterized in that: The height of the side shielding baffle is equal to the height of the side column.

8. A container ship drag reduction device taking into account the heat dissipation of cold boxes as claimed in claim 3, characterized in that: The longitudinal gap between the side shielding baffle and the container is 150mm-400mm.

9. A container ship drag reduction device taking into account the heat dissipation of cold boxes as claimed in claim 3, characterized in that: The ventilation holes are located below the middle shielding baffle plate, are configured as oval holes, and the number of the ventilation holes is 1 or 2.

10. A container ship drag reduction device taking cold box heat dissipation into consideration as claimed in claim 3, characterized in that: The material of the intermediate shielding baffle is carbon steel.

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