Maintenance platform device special for marine low-speed diesel engine tail end supercharger

Abstract

The invention belongs to the field of marine low-speed diesel engine tail end superchargers, and particularly relates to a special maintenance platform device for marine low-speed diesel engine tail end superchargers, a maintenance platform is composed of two independent assemblies arranged on the fuel oil side and the exhaust side of a main engine respectively, and each assembly comprises a floor assembly and a supporting assembly; the floor assembly is of a stepped structure and comprises an exhaust side maintenance floor body and a fuel oil side maintenance floor body. The supporting assembly comprises an exhaust side supporting piece, an exhaust side support piece and a fuel oil side supporting piece. The inner side of the exhaust side maintenance floor body is connected through the exhaust side supporting piece fixed to the shell of the air cooler, and the whole supporting assembly does not occupy the space of a safety channel beside the air cooler. The operation height is increased to the position of the supercharger base, so that sailors with limited heights can work nearby, and the efficiency, quality and safety of overhauling work are improved.

Description

Technical Field

[0001] The invention belongs to the field of tail-end superchargers for marine low-speed diesel engines, and in particular relates to a special maintenance platform device for tail-end superchargers for marine low-speed diesel engines. Background Art

[0002] In recent years, with the growing demand for small ships in the shipping market, the application of marine low-speed diesel engines with cylinder diameters of 350mm to 500mm has become increasingly widespread. Such models mostly adopt the design layout of tail-end scavenging air coolers, and the supercharger is usually arranged above the air cooler shell. Taking the 450mm cylinder diameter model as an example, there is a vertical height difference of about 1.1 meters between the supercharger base plane and the surrounding floor, and the daily maintenance height range is between 1.5 meters and 2.1 meters.

[0003] The prior art dedicated maintenance platform device for the tail-end supercharger of a low-speed marine diesel engine has an insufficient height of the cabin passage plane during maintenance, which causes crew members with limited height to frequently climb or use temporary tools during maintenance, which is inconvenient to operate and poses a safety hazard. In addition, traditional maintenance platforms usually occupy the space of the passage beside the machine, affecting the efficiency of equipment maintenance and the passage of personnel. Although some models are equipped with a construction platform at the front end, the tail-end supercharger area lacks special maintenance facilities, resulting in time-consuming and labor-intensive maintenance work. The prior art dedicated maintenance platform device for the tail-end supercharger of a low-speed marine diesel engine is difficult to meet the needs of efficient and safe maintenance, and there is an urgent need for a maintenance platform that can increase the operating height without occupying the passage space. Therefore, the development of a dedicated maintenance platform that is adapted to the layout of the tail-end supercharger and takes into account flexibility and safety has become the key to solving the above-mentioned technical pain points. Summary of the invention

[0004] The present invention aims to solve the problems of insufficient channel plane height of the special maintenance platform device for the tail end supercharger of a marine low-speed diesel engine in the prior art, potential safety hazards, occupation of the space of the passage beside the engine, affecting the equipment maintenance efficiency and the passage of personnel, and time-consuming and labor-intensive maintenance work. A special maintenance platform device for the tail end supercharger of a marine low-speed diesel engine is proposed. The maintenance platform is composed of two independent components respectively disposed on the fuel side and the exhaust side of the main engine, each component including a floor component and a support component;

[0005] The floor assembly is a stepped structure, comprising: an exhaust side inspection floor body and a fuel side inspection floor body;

[0006] The support assembly includes: an exhaust side support member, an exhaust side bracket member and a fuel side support member;

[0007] The inside of the main body of the exhaust side inspection floor is connected by the exhaust side support member fixed on the shell of the air cooler, and the outside is fixed by the exhaust side bracket member. The plane height of the main body of the exhaust side inspection floor is raised to the position of the supercharger base, which is 0.8-1.0 meters higher than the original supercharger channel plane height;

[0008] The fuel side support is fixed by rooting on the platform of the air cooler and the original structural beam of the air cooler, and the overall support assembly does not occupy the space of the safety passage beside the machine;

[0009] The main body of the fuel side inspection plate is integrated with the lower floor to form a structure for preventing falling objects; the main body of the exhaust side inspection floor includes an exhaust side shield cover and a surrounding guardrail arranged on the output end passage;

[0010] A portable aluminum alloy ladder is arranged in the area of the diesel engine tail end passage for assisting in working at heights;

[0011] The overall inspection platform can bear the working load of two people at the same time, and the disassembly and assembly do not require modifying the original structure of the diesel engine body.

[0012] According to a special inspection platform device for the tail end supercharger of a marine low-speed diesel engine described above, 4 exhaust side support members are arranged inside the stepped structure of the exhaust side floor main body and are connected to the embedded parts of the air cooler housing by bolts.

[0013] According to a special inspection platform device for the tail end supercharger of a marine low-speed diesel engine described above, the fuel side support member includes 2 diagonal ribs and 4 - 8 angle steels, and is fixed by rooting on the platform of the air cooler and the original structural beam of the air cooler.

[0014] According to a special inspection platform device for the tail end supercharger of a marine low-speed diesel engine described above, the exhaust side shield cover is of a semi-open structure, is integrated with the scavenging air box relief valve shield, and the opening and closing angle is 0° - 90°.

[0015] According to a special inspection platform device for the tail end supercharger of a marine low-speed diesel engine described above, the surface of the floor assembly is laid with anti-slip pattern steel plates with a thickness of not less than 5 mm.

[0016] According to a special inspection platform device for the tail end supercharger of a marine low-speed diesel engine described above, the height of the guardrail is 1.2 meters, and it adopts a detachable steel pipe structure, and the column spacing of the guardrail is not greater than 1.5 meters.

[0017] According to a special inspection platform device for the tail end supercharger of a marine low-speed diesel engine described above, the portable aluminum alloy ladder is of a folding structure, the unfolded height is 0.8 meters, and the load-bearing capacity is greater than 150 kg.

[0018] According to a special inspection platform device for the tail end supercharger of a marine low-speed diesel engine described above, the exhaust side support member and the fuel side support member are made of Q345B steel and are subjected to hot-dip galvanized anti-corrosion treatment on the surface.

[0019] According to the special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine described above, a mesh grille is provided below the main body of the fuel-side maintenance floor, and the aperture of the grille is not greater than 20 mm.

[0020] According to the special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine described above, a rubber shock pad with a thickness of 10 mm and a Shore hardness of 60±5 is provided at the connection between the support assembly and the engine body.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. By means of two independent maintenance platforms separately placed on the fuel side and the exhaust side, the operation height of the present invention is raised to the position of the supercharger base, which is about 0.9 meters higher than the original supercharger passage plane height, enabling crew members with limited height to work nearby and reducing the climbing risk.

[0023] 2. The support assembly of the present invention is fixed by taking root in the original structure around the engine body. Customized special exhaust-side support parts, exhaust-side bracket parts and fuel-side support parts are adopted. While ensuring the strength and being able to bear the simultaneous operation of two people, it avoids occupying the safety passage beside the engine and optimizes the space utilization rate.

[0024] 3. The maintenance platform of the present invention adopts a modular design, and the floor assembly and the support assembly are easy to disassemble and assemble, reducing the construction cost and the maintenance difficulty. The main body of the fuel-side maintenance floor is integrated with the lower floor to prevent falling objects. The main body of the exhaust-side maintenance floor includes a guardrail and an exhaust-side cover, further strengthening the safety protection. A portable aluminum alloy ladder is configured in the tail-end passage area to achieve flexible handling and rapid climbing.

[0025] The present invention realizes the circumferential maintenance of the supercharger, which not only meets the requirements of high-intensity operations, but also adapts to the engine room layouts of different ship types, significantly improving the user experience and providing an important reference for the standardization of the maintenance of small-bore tail-end supercharger models. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 : Schematic diagram of the installation positions of the main body of the exhaust-side maintenance floor, the exhaust-side bracket part and the exhaust-side cover of the special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine of the present invention.

[0027] Figure 2 : Schematic diagram of the installation position of the exhaust-side support part of the special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine of the present invention.

[0028] Figure 3 : Schematic diagram of the installation positions of the main body of the fuel-side maintenance plate and the fuel-side support part of the special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine of the present invention.

[0029] Figure 4 : Perspective view of the structural schematic diagram of the exhaust side maintenance floor main body of a special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine according to the present invention.

[0030] Figure 5 : Perspective view of the structural schematic diagram of the exhaust side support member of a special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine according to the present invention.

[0031] Figure 6 : Perspective view of the structural schematic diagram of the exhaust side shield cover of a special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine according to the present invention.

[0032] Figure 7 : Perspective view of the structural schematic diagram of the exhaust side support member of a special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine according to the present invention.

[0033] Figure 8 : Perspective view of the structural schematic diagram of the fuel side maintenance plate main body of a special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine according to the present invention.

[0034] Figure 9 : Perspective view of the structural schematic diagram of the fuel side support member of a special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine according to the present invention.

[0035] Figure 10 : Perspective view of the structural schematic diagram of the portable aluminum alloy ladder stool of a special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine according to the present invention.

[0036] In the figure: 1 - Exhaust side maintenance floor main body, 2 - Exhaust side support member, 3 - Exhaust side shield cover, 4 - Exhaust side support member, 5 - Fuel side maintenance plate main body, 6 - Fuel side support member, 7 - Portable aluminum alloy ladder stool, 8 - Air cooler, 9 - Lower floor, 10 - Supercharger, 11 - Output end channel. Detailed implementation manners

[0037] Preferred implementation manners

[0038] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0039] As Figures 1 to 6 shown: In this embodiment,

[0040] The design method of the special maintenance platform for the tail-end supercharger of a marine low-speed diesel engine according to the present invention will be described in detail as follows in combination with the attached Figures 1 - 6 drawings.

[0041] Figure Figures 1 to 3 As shown: A special maintenance platform device for the tail-end supercharger of a marine low-speed diesel engine, applicable to models with a cylinder diameter of 350 mm to 500 mm. The maintenance platform consists of two independent components separately placed on the fuel side and the exhaust side of the main engine. Each component includes a floor component and a support component;

[0042] The floor component is a stepped structure, including: the exhaust-side maintenance floor main body 1 and the fuel-side maintenance floor main body 5;

[0043] The support component includes: the exhaust-side support member 4, the exhaust-side bracket member 2, and the fuel-side support member 6;

[0044] The inner side of the exhaust-side maintenance floor main body 1 is connected through the exhaust-side support member 4 fixed on the shell of the air cooler 8, and the outer side is fixed through the exhaust-side bracket member 2. The plane height of the exhaust-side maintenance floor main body 1 is raised to the base position of the supercharger 10, increasing by 0.8 - 1.0 meters compared to the original plane height of the supercharger 10 passage;

[0045] The fuel-side support member 6 is fixed by taking root through the walkway of the air cooler 8 and the original structural beam of the air cooler 8. The overall support component does not occupy the space of the safety passage beside the machine;

[0046] The fuel-side maintenance plate main body 5 is integrated with the lower floor 9 to form a structure to prevent falling objects; the exhaust-side maintenance floor main body 1 includes an exhaust-side shield cover 3 arranged on the output-end passage 11 and surrounding guardrails;

[0047] A portable aluminum alloy ladder 7 is set in the tail-end passage area of the diesel engine for assisting in climbing operations;

[0048] The overall maintenance platform can bear the load of two people working simultaneously, and the disassembly and assembly do not require modifying the original structure of the diesel engine body.

[0049] There are 4 exhaust-side support members 4 arranged on the inner side of the stepped structure of the exhaust-side floor main body 1, and they are connected to the embedded parts of the shell of the air cooler 8 through bolts.

[0050] The fuel-side support member 6 includes 2 diagonal ribs and 4 - 8 angle steels, and is fixed by taking root through the walkway of the air cooler 8 and the original structural beam of the air cooler 8.

[0051] The exhaust-side shield cover 3 is a semi-open structure, integrated with the scavenging box air release valve shield, and the opening and closing angle is 0° - 90°.

[0052] The surface of the floor component is paved with anti-slip pattern steel plates with a thickness of not less than 5 mm.

[0053] The height of the guardrail is 1.2 meters, and it adopts a detachable steel pipe structure. The column spacing of the guardrail is not greater than 1.5 meters.

[0054] The portable aluminum alloy ladder-stool 7 is of a folding structure, with an unfolded height of 0.8 meters and a load-bearing capacity of more than 150 kg.

[0055] The exhaust side support member 2 and the fuel side support member 6 are made of Q345B steel and are subjected to hot-dip galvanized anti-corrosion treatment on the surface.

[0056] A mesh grille is provided below the fuel side maintenance floor main body 5, and the aperture of the grille is not greater than 20 mm.

[0057] A rubber shock pad is provided at the connection between the support assembly and the body, with a thickness of 10 mm and a Shore hardness of 60 ± 5.

[0058] As Figures 1 to 3 shown, the maintenance platforms are respectively arranged on the fuel side and the exhaust side at the tail end of the diesel engine. The fuel side maintenance floor main body 5 is close to the main fuel pipeline area of the host. The exhaust side maintenance floor main body 1 is arranged above the shell of the air cooler 8. The plane height of the exhaust side maintenance floor main body 1 is increased by 0.9 meters compared with the original plane height of the supercharger 10 passage, reaching the position of the base of the supercharger 10, forming a surrounding maintenance space. A portable aluminum alloy ladder-stool 7 is arranged in the tail end passage area of the diesel engine for temporary climbing.

[0059] As Figure 4 shown, the exhaust side maintenance floor main body 1 is of a stepped structure. The inner side is bolted to the embedded parts of the shell of the air cooler 8 through 4 exhaust side support members 4, and the outer side is supported and fixed by the exhaust side support member 2. The exhaust side support member 2 is made of Q345B steel and is in an L shape. One end is welded to the stiffening rib of the shell of the air cooler 8, and the other end is fixed to the exhaust side maintenance floor main body 1 through a flange. An exhaust side guard cover 3 is arranged on the output end passage 11 and is integrated into the scavenging box air release valve guard, with an opening and closing angle of 90°, facilitating personnel to climb onto the platform. Removable guardrails are installed around the exhaust side maintenance floor main body 1, with a height of 1.2 meters, a column spacing of 1.2 meters, and the cross bars are made of Φ25mm steel pipes.

[0060] As Figure 8 、 Figure 9 shown, the fuel side maintenance floor main body 5 is an integral non-slip steel plate with a thickness of 5 mm, which is welded to the lower floor 9 to form a whole, preventing tools from falling into the engine room. The fuel side support member 6 is composed of 2 diagonal ribs and 4 angle steels. One end of the diagonal rib is welded to the main walking beam of the air cooler 8, and the other end is connected to the shell of the air cooler 8 through bolts; the angle steels are arranged horizontally to enhance the anti-torsion strength of the fuel side maintenance floor main body 5. A mesh grille with an aperture of 20 mm is installed below the fuel side maintenance floor main body 5, which has both ventilation and anti-fall functions.

[0061] When installing the support components, first locate the embedded parts of the shell of the air cooler 8, and fix the exhaust side support 4 with M16 bolts; for the fuel side support 6, utilize the original reserved hole positions on the platform of the air cooler 8 and adopt a composite connection of welding and bolts. A 10-mm-thick rubber shock pad is added at all connection points to reduce vibration and noise.

[0062] As Figure 10 shown: The aluminum alloy ladder stool adopts a folding structure. After unfolding, the height is 1.8 meters, the pedal width is 400 mm, and the surface is provided with anti-slip patterns. Rubber anti-slip pads are installed at the bottom of the ladder stool, and hooks are set at the top to be fixed to the platform guardrail to ensure stability.

[0063] The static load test of the platform shows that the maximum deformation of the main body 5 of the fuel side maintenance floor is ≤2 mm, and the load is 2 kN / m 2 , and the bending strength of the exhaust side support 2 is ≥150 MPa, meeting the requirement of two people working simultaneously.

[0064] Construction process:

[0065] a. Customize the floor components and support components according to the model size;

[0066] b. Remove the original channel cover plates, install the support components and fix them;

[0067] c. Assemble the floor components, connect the guardrail and the exhaust side shield cover 3;

[0068] d. Debug the portable aluminum alloy ladder stool 7 and complete the acceptance.

[0069] Through modular design and reuse of the original structure, the present invention significantly reduces the transformation cost, and the disassembly and assembly time of the platform does not exceed 4 hours, which is applicable to the rapid deployment of various types of tail-end turbocharger models.

[0070] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A special maintenance platform device for a tail-end supercharger of a low-speed marine diesel engine, characterized in that: The inspection platform is composed of two independent components located on the fuel side and exhaust side of the main engine, each component including a floor component and a support component; The floor assembly is a stepped structure, comprising: an exhaust side inspection floor body (1) and a fuel side inspection floor body (5); The support assembly comprises: an exhaust side support member (4), an exhaust side bracket member (2) and a fuel side support member (6); The inner side of the exhaust side inspection floor body (1) is connected to the exhaust side support member (4) fixed on the shell of the air cooler (8), and the outer side is fixed by the exhaust side bracket member (2). The plane height of the exhaust side inspection floor body (1) is raised to the position of the base of the supercharger (10), which is 0.8-1.0 meters higher than the plane height of the original supercharger (10) channel. The fuel side support member (6) is rooted and fixed through the walkway of the air cooler (8) and the original structural beam of the air cooler (8), and the support assembly as a whole does not occupy the space of the machine side safety passage; The fuel side inspection panel body (5) is connected to the floor (9) below as a whole to form a falling object prevention structure; the exhaust side inspection floor body (1) includes an exhaust side protective cover (3) and a peripheral guardrail arranged on the output end channel (11); A portable aluminum alloy ladder stool (7) is provided in the passage area at the rear end of the diesel engine to assist in climbing operations; The maintenance platform as a whole can bear the load of two people working at the same time, and the original structure of the diesel engine body does not need to be modified for disassembly and assembly.

2. A special maintenance platform device for a tail-end supercharger of a low-speed diesel engine for a ship according to claim 1, characterized in that: Four exhaust side support members (4) are arranged on the inner side of the stepped structure of the exhaust side floor main body (1) and are connected to the shell embedded members of the air cooler (8) by means of bolts.

3. A special maintenance platform device for a tail-end supercharger of a low-speed diesel engine for a ship according to claim 2, characterized in that: The fuel side support member (6) comprises 2 oblique ribs and 4-8 angle steels, and is rooted and fixed through the walkway of the air cooler (8) and the original structural beam of the air cooler (8).

4. A special maintenance platform device for a tail end supercharger of a low-speed diesel engine for a ship according to claim 3, characterized in that: The exhaust side guard cover (3) is a semi-open structure, integrated with the scavenging box air release valve guard, and has an opening and closing angle of 0°-90°.

5. A special maintenance platform device for a tail end supercharger of a low-speed marine diesel engine according to claim 4, characterized in that: The surface of the floor assembly is paved with an anti-slip patterned steel plate with a thickness of not less than 5 mm.

6. A special maintenance platform device for a tail end supercharger of a low-speed diesel engine for a ship according to claim 5, characterized in that: The guardrail is 1.2 meters high and adopts a detachable steel pipe structure. The spacing between the guardrail posts is no more than 1.5 meters.

7. A special maintenance platform device for a tail end supercharger of a low-speed diesel engine for a ship according to claim 6, characterized in that: The portable aluminum alloy ladder stool (7) is a folding structure with an unfolded height of 0.8 meters and a load-bearing capacity of more than 150 kg.

8. A special maintenance platform device for a tail end supercharger of a low speed marine diesel engine according to claim 7, characterized in that: The exhaust side support member (2) and the fuel side support member (6) are made of Q345B steel, and the surfaces are subjected to hot-dip galvanizing anti-corrosion treatment.

9. A special maintenance platform device for a tail end supercharger of a low-speed diesel engine for a ship according to claim 8, characterized in that: A mesh grille is provided below the fuel side inspection floor body (5), and the grille aperture is not greater than 20 mm.

10. A special maintenance platform device for a tail-end supercharger of a low-speed marine diesel engine according to claim 9, characterized in that: A rubber shock-absorbing pad is provided at the connection between the support assembly and the machine body, with a thickness of 10 mm and a Shore hardness of 60±5.

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