Marine main engine smoke exhaust pipe suitable for narrow space area

Abstract

The marine main engine smoke exhaust pipe suitable for the narrow space area comprises a non-circular smoke exhaust pipe section, the width of the cross section of the non-circular smoke exhaust pipe section is larger than the height of the cross section of the non-circular smoke exhaust pipe section, and the cross section size of the cross section of the non-circular smoke exhaust pipe section is not smaller than the cross section size of an upstream flue of the non-circular smoke exhaust pipe section; the two ends of the non-circular smoke exhaust pipe section are connected with an adjacent flue through a transition connecting pipe section fixed in a sealed mode respectively, the section shape of the end, close to the non-circular smoke exhaust pipe section, of the transition connecting pipe section is a non-circular section matched with the non-circular smoke exhaust pipe section, and the section shape of the other end of the transition connecting pipe section is a circular section matched with the adjacent flue. According to the embodiment of the invention, the large-size marine main engine smoke exhaust pipeline with the circular section is optimized into the pipeline structure with the flat section, the section height of the pipeline is properly reduced in a manner of increasing the section width of the pipeline, and on the premise of ensuring that the circulation area is sufficient and the exhaust back pressure of the main engine is not influenced, the smoke exhaust efficiency is improved. The problems that the main engine smoke exhaust pipe affects the net layer height and is not attractive enough are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of ship outfitting, and particularly to a main engine exhaust pipe for a ship adapted to narrow spaces. Background Art

[0002] Generally, the exhaust pipe of a ship's main engine is much larger in size than other pipes on the ship. For narrow spaces on the ship, especially important passageways, the exhaust pipe of the main engine will seriously affect the net floor height and aesthetics of the passing position. Therefore, there is an urgent need for a main engine exhaust pipe for a ship adapted to narrow spaces to solve the problems that the size of the exhaust pipe of the ship's main engine is large, seriously affecting the net floor height and aesthetics of the passing position. Summary of the Invention

[0003] In view of the above problems existing in the prior art, the embodiments of the present invention provide a main engine exhaust pipe for a ship adapted to narrow spaces to solve the technical problems that the exhaust pipe of the ship's main engine in the prior art affects the net floor height and aesthetics of the passing position.

[0004] The embodiments of the present invention provide a main engine exhaust pipe for a ship adapted to narrow spaces, including: a non-circular exhaust pipe section, the cross-sectional width of the non-circular exhaust pipe section is greater than its cross-sectional height, and the cross-sectional size of its cross-section is not less than the cross-sectional size of the upstream flue; both ends of the non-circular exhaust pipe section are respectively connected to the adjacent flue through a sealed and fixed transition connection pipe section, and the cross-sectional shape of the transition connection pipe section near the non-circular exhaust pipe section is a non-circular cross-section matching the non-circular exhaust pipe section, and the cross-sectional shape of the other end is a circular cross-section matching the adjacent flue.

[0005] In one embodiment, the cross-section of the non-circular exhaust pipe section is rectangular or elliptical.

[0006] In one embodiment, the aspect ratio of the width to the height of the cross-section of the non-circular exhaust pipe section is between 1.5:1 and 2:1.

[0007] In one embodiment, connection lugs are fixedly arranged on the outer surface of the non-circular exhaust pipe section, and the connection lugs are fixedly connected to the strong structure in the adjacent area through elastic suspension hangers.

[0008] In one embodiment, the connection lugs are fixedly arranged at the top of the non-circular exhaust pipe section by welding.

[0009] In one embodiment, the connection lugs are inclined.

[0010] In one embodiment, the angle between the plate body of the connection lugs and the horizontal plane is between 30° and 90°.

[0011] In one embodiment, the connecting lugs are arranged staggeredly, and the connecting lugs connected to the elastic hanging bracket on one side are fixed on the other side of the central axis of the non-circular exhaust pipe section.

[0012] Compared with the prior art, the beneficial effect of a ship main engine exhaust pipe adapted to narrow space areas provided by the embodiment of the present invention is as follows: By optimizing the large-size ship main engine exhaust pipe with a circular cross-section into a pipe structure with a flat cross-section and designing an appropriate width-to-height ratio, the cross-section height of the pipe is appropriately reduced by increasing the cross-section width of the pipe. On the premise of ensuring sufficient flow area and not affecting the exhaust back pressure of the main engine, the problem that the passing position of the main engine exhaust pipe affects the net floor height and the lack of aesthetics is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a top view structural schematic diagram of a ship main engine exhaust pipe adapted to narrow space areas provided by an embodiment of the present invention;

[0014] Figure 2 It is a side view structural schematic diagram of a ship main engine exhaust pipe adapted to narrow space areas provided by an embodiment of the present invention;

[0015] Figure 3 It is a schematic diagram of a flange structure related to a ship main engine exhaust pipe adapted to narrow space areas provided by an embodiment of the present invention;

[0016] Figure 4 It is a schematic diagram of a cross-sectional structure at the connecting lug related to a ship main engine exhaust pipe adapted to narrow space areas provided by an embodiment of the present invention;

[0017] Figure 5 It is a schematic diagram of the structure of the connecting lug and the elastic hanging bracket related to a ship main engine exhaust pipe adapted to narrow space areas provided by an embodiment of the present invention.

[0018] Reference Signs:

[0019] 1. Flange; 2. Transition connecting pipe section; 3. Non-circular exhaust pipe section; 4. Connecting lug; 5. Elastic hanging bracket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described in detail below with reference to the drawings and specific embodiments.

[0021] Reference is made herein to the various schemes and features of the present application as described with reference to the drawings.

[0022] These and other features of the present application will become apparent from the following description of the preferred forms of the embodiments given as non-limiting examples with reference to the drawings.

[0023] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art can surely implement many other equivalent forms of the present application, which have the features as described in the claims and thus are all within the protection scope defined hereby.

[0024] When combined with the accompanying drawings, the above and other aspects, features and advantages of the present application will become more obvious in view of the following detailed description.

[0025] Hereinafter, specific embodiments of the present application will be described with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are only examples of the present application, which can be implemented in various ways. Well-known and / or repetitive functions and structures are not described in detail to clarify the true intention based on the user's historical operations and to avoid unnecessary or redundant details from obscuring the present application. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but are only used as a basis and representative basis for the claims to teach those skilled in the art to use the present application in substantially any suitable detailed structure in various ways.

[0026] This specification may use the phrase "in one embodiment", "in another embodiment", "in yet another embodiment" or "in other embodiments", which may each refer to one or more of the same or different embodiments according to the present application.

[0027] The principles and features of the present invention will be described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention. The following combines Figures 1-5 , and further details of the preferred embodiments of the present invention are described as follows:

[0028] As Figures 1-2 shown, an embodiment of the present invention provides a marine main engine exhaust pipe adapted to narrow space areas, including: a non-circular exhaust pipe section 3, the cross-sectional width of the non-circular exhaust pipe section 3 is greater than its cross-sectional height, and the cross-sectional height is appropriately reduced by appropriately increasing the cross-sectional width to reduce the vertical height occupied by the exhaust pipe section in the passing area. At the same time, in order to ensure that the flow area is sufficient and does not affect the exhaust back pressure of the main engine, the cross-sectional size of the cross-section of the non-circular exhaust pipe section 3 is not less than the cross-sectional size of the cross-section of its upstream flue; both ends of the non-circular exhaust pipe section 3 are respectively connected to the adjacent flue through a sealed and fixed transition connection pipe section 2, and the cross-sectional shape of the transition connection pipe section 2 near one end of the non-circular exhaust pipe section 3 is a non-circular cross-section matching the non-circular exhaust pipe section 3, and the cross-sectional shape of the other end thereof is a circular cross-section matching the adjacent flue;

[0029] In one embodiment, for the convenience of manufacturing, the cross-section of the non-circular smoke exhaust pipe section 3 is rectangular or elliptical, wherein the aspect ratio of the width to the height of the cross-section of the non-circular smoke exhaust pipe section 3 is between 1.5:1 and 2:1;

[0030] As Figure 3 shown, for the convenience of connecting the pipe section to the adjacent flue, in one embodiment, flanges 1 are hermetically fixed at both ends of the transition connection pipe section 2;

[0031] As Figures 4-5 shown, because the main engine smoke exhaust pipe has certain thermal expansion characteristics, it is necessary to fix it to a strong structure through a conventional elastic hanger 5. For the convenience of fixing the smoke exhaust pipe through the elastic hanger 5, in one embodiment, a connecting ear plate 4 for connecting the elastic hanger 5 is fixedly arranged on the outer surface of the non-circular smoke exhaust pipe section 3, and the connecting ear plate 4 is fixedly arranged at the top of the non-circular smoke exhaust pipe section 3 in a welding manner. On this basis, since the size of the elastic hanger 5 purchased according to the specification requirements is relatively fixed, in order to reduce the size of the space left empty at the top of the smoke exhaust pipe for installing the elastic hanger 5, the connecting ear plate 4 is inclined, and the elastic hanger 5 is also adaptively arranged in an inclined connection manner. Of course, for the consideration of reasonable acceptance and to reserve sufficient operating space at the connecting ear plate 4 to facilitate screwing bolts to achieve the bolted fixation of the connecting ear plate 4 and the elastic hanger 5, the included angle between the plate body of the connecting ear plate 4 and the horizontal plane is between 30° and 90°. In one embodiment, the connecting ear plates 4 are arranged staggeredly, and the connecting ear plates 4 connected to one side of the elastic hanger 5 are fixed on the other side of the central axis of the non-circular smoke exhaust pipe section 3. In this way, the longer part of the elastic hanger 5 can be installed in the projection area above the non-circular smoke exhaust pipe section 3 as much as possible, further reducing the space occupied by the elastic hanger 5 in the horizontal direction.

[0032] Embodiment 1

[0033] In this embodiment, by converting the circular pipe into a rectangular pipe and ensuring the same cross-section, the size of the smoke exhaust pipe in the height direction is minimized as much as possible. By adjusting the size in the height direction, the problem of insufficient net floor height is solved.

[0034] This embodiment mainly consists of a flange 1, a transition connection pipe section 2, a non-circular smoke exhaust pipe section 3, a connecting ear plate 4 and an elastic hanger 5. The specific external structure refers to Figures 1-2In this embodiment, lightweight materials such as titanium alloy or stainless steel are preferably selected. The titanium alloy material is TC4 (GB / T 3621-2007), which is convenient for bending and forming. This embodiment is mainly formed by bending and welding plates. The main manufacturing difficulty lies in the roll forming of the square-to-round transition connecting pipe section 2. The cross-sectional dimensions of the transition connecting pipe section 2 and the non-circular exhaust pipe section 3 need to be obtained through actual calculation. The requirement is that the effective cross-sectional area of the circular pipe is equivalent to that of the square pipe to ensure the same flow area and avoid affecting the back pressure.

[0035] During manufacturing, first, the square-to-round pipe fitting (transition connecting pipe section 2) is butt-welded to the square pipe (non-circular exhaust pipe section 3). After welding, the two end flanges 1 are welded and formed with the square-to-round pipe fitting (transition connecting pipe section 2) by fillet welding. After completion, the connecting ear plates 4 are welded and installed on the upper surface of the square pipe (non-circular exhaust pipe section 3). After welding, clean the welds, and the inner surface should be as smooth as possible. After assembly, conduct a strength test, and the test pressure is 0.02 MPa.

[0036] The key point in the manufacturing of this embodiment lies in the calculation of the exhaust back pressure. By calculation, a rectangular pipe with appropriate dimensions is selected, which should not only ensure sufficient cross-sectional area but also not increase the exhaust back pressure of the main engine. Therefore, appropriate width and height dimensions are very important.

[0037] Because the main engine exhaust pipe has certain thermal expansion characteristics, it needs to be fixed to the strong structure through conventional elastic hangers 5. The specific type can be seen in Figure 4-5; if the device is too long, two pairs, a total of four elastic hangers 5, need to be set to avoid shaking. Since the connecting ear plates 4 have been pre-made on the upper surface of the exhaust pipe and there are openings on the ear plates. They are connected to the elastic hangers 5 through bolts. Different from the conventional welding design, its fixing method is bolt connection, which is convenient for later disassembly and has good disassembly and maintainability. Of course, the connecting ear plates 4 can also be detachably fixed in the form of a hoop, and the specific fixing method needs to be selected according to the application scenario. Moreover, the connecting ear plates 4 can be stagger-designed and have a certain slope (30°-90° is appropriate), which can not only save the space above the exhaust pipe and further raise the exhaust pipe but also effectively avoid the shaking of the exhaust pipe.

[0038] The specific manufacturing process is as follows: dimension calculation and design, plate cutting, component forming, connecting piece welding and assembly, airtightness inspection, and on-board fixed installation.

[0039] The embodiment of the present invention is simple to manufacture and durable, suitable for popularization and use. At the same time, the embodiment of the present invention also has the characteristics of easy operation and installation, convenient disassembly, and reusability, which is of great significance for saving ship space.

[0040] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions within the essence and protection scope of the present invention, and such modifications or equivalent substitutions should also be regarded as falling within the protection scope of the present invention.

Claims

1. A marine main engine exhaust pipe adapted to narrow space areas, characterized in that, Comprising: A non-circular smoke exhaust pipe section (3), the cross-sectional width of the non-circular smoke exhaust pipe section (3) is greater than its cross-sectional height, and the cross-sectional size of its cross-section is not less than the cross-sectional size of the cross-section of its upstream flue; both ends of the non-circular smoke exhaust pipe section (3) are respectively connected to the adjacent flue through a sealed and fixed transition connection pipe section (2), and the cross-sectional shape of the transition connection pipe section (2) near the non-circular smoke exhaust pipe section (3) is a non-circular cross-section matching the non-circular smoke exhaust pipe section (3), and the cross-sectional shape of the other end thereof is a circular cross-section matching the adjacent flue.

2. The exhaust pipe of a ship's main engine adapted to narrow space areas according to claim 1, characterized in that: The cross-section of the non-circular smoke exhaust pipe section (3) is rectangular or elliptical.

3. The exhaust pipe of a ship's main engine adapted to a narrow space area according to claim 2, characterized in that: The width-to-height ratio of the cross-section of the non-circular smoke exhaust pipe section (3) is between 1.5:1 and 2:

1.

4. A ship main engine exhaust pipe adapted to narrow space areas, characterized in that: Connection ear plates (4) are fixedly arranged on the outer surface of the non-circular smoke exhaust pipe section (3), and the connection ear plates (4) are fixedly connected to the strong structure in the adjacent area through elastic hanging brackets (5).

5. A ship's main engine exhaust pipe adapted to narrow space areas, characterized in that: The connection ear plates (4) are fixedly arranged at the top of the non-circular smoke exhaust pipe section (3) by welding.

6. The exhaust pipe of a ship's main engine adapted to narrow space areas according to claim 5, characterized in that: The connection ear plates (4) are arranged obliquely.

7. A ship main engine exhaust pipe adapted to a narrow space area according to claim 6, characterized in that: The included angle between the plate body of the connection ear plates (4) and the horizontal plane is between 30° and 90°.

8. A marine main engine exhaust pipe adapted to narrow space areas, characterized in that: The connection ear plates (4) are arranged staggeredly, and the connection ear plates (4) connected to one side of the elastic hanging bracket (5) are fixed on the other side of the central axis of the non-circular smoke exhaust pipe section (3).

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