A new type of main discharge tee

Abstract

This utility model relates to a novel main exhaust tee pipe. The tee pipe includes a merging main pipe and two main exhaust port extension pipes. The first port of the merging main pipe is connected to the two parallel main exhaust port extension pipes, and the remaining portion of this end is sealed by a sealing plate. A muffler connecting flange is installed at the second port of the merging main pipe. A main exhaust port connecting flange is installed at the end of the main exhaust port extension pipe furthest from the merging main pipe. The main exhaust port extension pipes have a straight pipe structure. The advantages of this utility model are: by merging a dual exhaust system into a single exhaust path, the pipeline layout is simplified; because the two branch main exhaust port extension pipes connected to the outlet expansion joint of the main exhaust port are parallel and without angles, there is no interference between the airflows, resulting in smooth exhaust flow after merging and avoiding engine power loss; the straight pipe structure of the main exhaust port extension pipes reduces bends and pipe length, optimizes the pipeline layout, and adapts to compact space requirements.

Description

Technical Field

[0001] This utility model relates to the field of exhaust of generator sets for cutter suction dredgers, specifically to a novel main generator exhaust tee. Background Technology

[0002] The 25-meter deep-dredging, electrically driven, modular, environmentally friendly cutter suction dredger will have a main diesel generator set on each of its left and right pontoons to power the entire vessel. (See attached...) Figure 1 As shown, each main diesel generator is factory-configured with dual exhaust outlets 10. Traditionally, the dual exhaust outlets 10 of a main diesel generator are connected to a dual exhaust merging pipe in a slit-pipe configuration. The branches of the merging pipe are angled branch pipes with 45-degree bends. This traditional angled branch pipe has welded bends, resulting in high single exhaust loads. Furthermore, after merging, the two branches converge into the main pipeline at a certain symmetrical angle. Under prolonged high-load operation of the generator, the exhaust airflow can create a certain amount of back pressure, affecting the normal operation of the main generator. Simultaneously, the bends in the angled branch pipes lead to a longer pipeline length, requiring more space for pipeline layout and occupying more engine room space, making the engine room structure less compact. A new type of main generator exhaust tee pipe is needed to reduce back pressure and pressure loss, optimize the pipeline layout, and adapt to the compact space requirements of small vessel engine rooms. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a new type of main generator exhaust tee pipe, which can solve the problems of the existing double exhaust merging pipe in the form of a shorts pipe, which has welded bends in the branch pipe, resulting in a large pipe length, a large pipe layout space, and the two branches merging into the main pipe at a certain symmetrical angle after merging, resulting in a certain counterflow or surge of exhaust airflow, which leads to increased back pressure and affects the normal operation of the main generator.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: it includes a merging main pipe and two main exhaust port extension pipes. The merging main pipe is provided with a first port and a second port. The first port is connected to the two parallel main exhaust port extension pipes, and the remaining part of this end of the merging main pipe is closed by a sealing plate. The second port of the merging main pipe is equipped with a muffler docking flange, through which the merging main pipe is docked to the muffler. The main generator exhaust port extension pipe is equipped with a main generator exhaust port docking flange at the end away from the main merging pipe, and the main generator exhaust port extension pipe is connected to the main generator exhaust port through the main generator exhaust port docking flange. The main exhaust port extension connector is a straight pipe structure; The diameter of the first port of the merging main unit is larger than the diameter of the second port.

[0005] Furthermore, the outer side of the main exhaust port extension pipe is welded and fixed to the sealing plate.

[0006] Furthermore, the merging main pipe includes a first pipe section, a second pipe section, and a third pipe section arranged sequentially. The first pipe section is located at a first port, the third pipe section is located at a second port, the diameter of the first pipe section is larger than the diameter of the third pipe section, and the diameter of the second pipe section gradually decreases from the first pipe section to the third pipe section.

[0007] Furthermore, the diameter of the merging main pipe is set to D3, and the diameters of the two main exhaust port extension pipes are set to D1 and D2 respectively, where D3 satisfies D3≥ .

[0008] The advantages of this utility model after adopting the above structure are as follows: By using the new three-way pipe structure, the dual exhaust system is merged into a single exhaust. When the main generator exhausts from both exhaust ports, the gas flows upward along the outlet expansion joint and is directly discharged into the three-way pipe, simplifying the pipeline layout. Since the two branch main exhaust port extension pipes connected to the outlet expansion joint of the main exhaust port are set in parallel without any included angle, the exhaust pressure is balanced and there is no interference between the airflows. After merging, the pipeline exhaust is smooth, avoiding engine power loss. Moreover, it is directly connected to the muffler, reducing the complexity of muffler adaptation in dual exhaust, and achieving the dual effects of energy saving and emission reduction. At the same time, the main exhaust port extension pipe is a straight pipe structure, which reduces bends and pipeline length, optimizes the pipeline layout in terms of space, and adapts to the compact space requirements of the engine room of small ships. Attached Figure Description

[0009] Figure 1 A schematic diagram of the dual exhaust outlets of the main diesel generator; Figure 2 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments can enable those skilled in the art to more fully understand this utility model, but do not limit the present utility model to the scope of the described embodiments.

[0011] like Figure 2As shown, this specific embodiment adopts the following technical solution: it includes a merging main pipe 2 and two main exhaust port extension pipes 3. The merging main pipe 2 is provided with a first port 24 and a second port 25. The first port 24 is connected to the two parallel main exhaust port extension pipes 3. The gas is directly discharged and diverted into the merging main pipe 2, and the remaining part of this end of the merging main pipe 2 is sealed by a sealing plate 5. The outer side of the main exhaust port extension pipe 3 is welded and fixed to the sealing plate 5. The airflow is discharged evenly and the airflow is stable, reducing back pressure.

[0012] The diameter of the main pipe 2 is set as D3, and the diameters of the two main exhaust port extension pipes 3 are set as D1 and D2 respectively, where D3 satisfies D3≥ .

[0013] The main exhaust port extension pipe 3 has a straight pipe structure, which reduces bends and pipe length, optimizes the pipe layout in terms of space, and adapts to the compact space requirements of the engine room of small ships.

[0014] The second port 25 of the combined main pipe 2 is equipped with a muffler docking flange 1. The combined main pipe 2 is connected to the muffler through the muffler docking flange 1. After the dual exhaust is combined, it is connected to a large muffler, which reduces the complexity of muffler adaptation when dual exhaust is used and achieves the dual effect of energy saving and emission reduction.

[0015] The main exhaust port extension pipe 3 is equipped with a main exhaust port docking flange 4 at the end away from the main merging pipe 2. The main exhaust port extension pipe 3 is paired and connected to the expansion joint of the main exhaust port through the main exhaust port docking flange 4.

[0016] The diameter of the first port 24 of the merged main pipe 2 is greater than the diameter of the second port 25.

[0017] The main pipe 2 includes a first pipe section 21, a second pipe section 22 and a third pipe section 23 arranged sequentially. The first pipe section 21 is located at the first port 24, and the third pipe section 23 is located at the second port 25. The diameter of the first pipe section 21 is larger than the diameter of the third pipe section 23, and the diameter of the second pipe section 22 gradually decreases from the first pipe section 21 to the third pipe section 23.

[0018] Working principle: When the main generator exhausts gas through its dual exhaust ports, the gas flows upward along the outlet expansion joint and directly into the tee pipe. The gas then enters the merging main pipe 2 through two parallel main generator exhaust port extension pipes 3, merging the dual exhaust system into a single exhaust path. This simplifies the pipeline layout, ensures balanced exhaust pressure, and eliminates interference between airflows. The merged pipeline provides smooth exhaust flow, avoiding engine power loss and ensuring normal operation of the main generator. The merging main pipe 2 directly connects to a large muffler, reducing the complexity of muffler adaptation during dual exhaust. The main generator exhaust port extension pipe 3 has a straight pipe structure, reducing bends and pipeline length, optimizing the pipeline layout in terms of space, and adapting to the compact space requirements of small ship engine rooms.

[0019] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A new type of main discharge tee, characterized in that: The device includes a merging main pipe and two main exhaust port extension pipes. The merging main pipe has a first port and a second port. The first port is connected to the two parallel main exhaust port extension pipes, and the remaining part of the merging main pipe at the end of the first port is sealed by a sealing plate. The second port of the merging main pipe is equipped with a muffler docking flange, which connects the merging main pipe to the muffler. The end of the main exhaust port extension pipe away from the merging main pipe is equipped with a main exhaust port docking flange, which connects the main exhaust port extension pipe to the main exhaust port. The main exhaust port extension connector is a straight pipe structure; the diameter of the first port of the merging main pipe is larger than the diameter of the second port.

2. A novel main discharge header tee according to claim 1, characterized in that: The outer side of the main exhaust port extension pipe is welded and fixed to the sealing plate.

3. A novel main discharge header tee according to claim 1, characterized in that: The main pipe includes a first pipe section, a second pipe section, and a third pipe section arranged sequentially. The first pipe section is located at a first port, and the third pipe section is located at a second port. The diameter of the first pipe section is larger than the diameter of the third pipe section, and the diameter of the second pipe section gradually decreases from the first pipe section to the third pipe section.

4. A novel main discharge header tee according to claim 1, characterized in that: The diameter of the merging pipe is set as D3, the diameters of the two main exhaust port extension pipes are set as D1 and D2 respectively, D3 satisfies D3≥ .

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