Adjustable flexible connection exhaust corrugated pipe for marine engine

Abstract

The utility model discloses an adjustable flexible connection exhaust corrugated pipe for a marine engine, belongs to the technical field of pipeline connection, and solves the problem of low efficiency caused by the fact that bolt holes in two flanges need to be aligned when the two pipelines are connected through the flanges. The adjustable flexible connection exhaust corrugated pipe body for the marine engine comprises a corrugated pipe body, a first connecting flange and a second connecting flange are arranged at the two ends of the corrugated pipe body respectively, and a plurality of first connecting flange holes which are circumferentially arranged at equal intervals are formed in the first connecting flange; the first connecting flange is provided with a plurality of first connecting flange holes which are circumferentially arranged at equal intervals, the second connecting flange is provided with a plurality of second connecting flange holes which are circumferentially arranged at equal intervals, the first connecting flange comprises a fixed flange and a movable flange, the fixed flange is fixedly arranged at one end of the corrugated pipe, and the movable flange is provided with a sinking groove. According to the adjustable flexible connection exhaust corrugated pipe for the marine engine, the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, and more specifically, it relates to an adjustable flexible connection exhaust bellows for marine engines. Background Technology

[0002] Pipe connections include connections between pipes, connections between pipes and valves, and connections between elbows and pipes and valves. Connections between pipes are typically made using flanges, such as... Figure 1 As shown, the exhaust manifold 5 and the engine turbo manifold 4 are connected by the bellows body 3. The bellows body 3 is connected to the engine turbo manifold 4 and the exhaust manifold 5 by flanges, and the flanges are usually welded to the port of the connector (bellows body 3).

[0003] Conventional corrugated pipe connection methods require the exhaust manifold position to be determined on-site only after the engine is in place and installed. On-site measurements and layout are then carried out before welding and fabricating the exhaust manifold. This method has several drawbacks: firstly, it necessitates on-site work; secondly, on-site work takes a long time, significantly impacting production; and thirdly, the on-site working environment is poor, with limited space, compromising safety and quality, and resulting in low work efficiency. Furthermore, when the pipe has bends and space is limited, it is difficult to rotate and adjust its position, leading to deviations in the bolt hole positions between flanges, requiring adjustments that are time-consuming and labor-intensive. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art by providing an adjustable flexible exhaust bellows for marine engines, which can realize the prefabrication of the exhaust manifold, on-site adjustment and installation, reduce rework, and improve work efficiency.

[0005] The technical solution of this utility model is as follows: An adjustable flexible exhaust bellows for marine engines includes a bellows body. A first connecting flange and a second connecting flange are respectively provided at both ends of the bellows body. The first connecting flange has a plurality of first connecting flange holes arranged circumferentially at equal intervals. The second connecting flange has a plurality of second connecting flange holes arranged circumferentially at equal intervals. The first connecting flange includes a fixed flange and a movable flange. The fixed flange is fixedly installed at one end of the bellows. The movable flange has a countersunk groove, the diameter of which is adapted to the diameter of the fixed flange. The fixed flange is rotatably installed in the settling tank. Multiple first connecting flange holes are located on the movable flange outside the fixed flange. The movable flange has a first groove on its side wall, and a first connecting plate is rotatably installed in the first groove. The second connecting flange has a second groove on its side wall, and a second connecting plate is rotatably installed in the second groove. Both the first and second connecting plates have mounting holes, and double-ended studs are installed in the mounting holes. The double-ended studs pass through the first and second connecting plates in sequence. Fastening nuts are threaded onto the double-ended studs on both sides of the first and second connecting plates.

[0006] As a further improvement, a first rotating rod is provided in the first groove, and the first connecting plate is rotatably installed in the first groove via the first rotating rod. A second rotating rod is provided in the second groove, and the second connecting plate is rotatably installed in the second groove via the second rotating rod. Torque springs are provided between the first connecting plate and the first rotating rod, and between the second connecting plate and the second rotating rod.

[0007] Furthermore, the rotation direction of the first connecting plate is opposite to the rotation direction of the second connecting plate.

[0008] Furthermore, a connecting rod is provided at one end of both the first connecting plate and the second connecting plate.

[0009] Furthermore, the circumferential surface of the corrugated pipe body is wrapped with heat-insulating cotton.

[0010] Furthermore, a third groove is provided on the end face of the fixed flange, and a sealing ring is engaged in the third groove.

[0011] Beneficial effects

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] 1. The present invention relates to an adjustable flexible connection exhaust bellows for marine engines. The movable flange can rotate 360° around its central axis to adjust the circumferential position of the first connecting flange hole on the first connecting flange and make it correspond one-to-one with the bolt holes on the exhaust manifold connecting flange. This allows for the prefabrication of the exhaust manifold, on-site adjustment and installation, reducing rework and improving work efficiency.

[0014] 2. This utility model discloses an adjustable flexible exhaust bellows for marine engines. During transportation, double-ended studs pass through the first and second connecting plates and are threadedly connected to the studs via fastening nuts. The double-ended studs fix the movable flange, supporting it during transportation and installation to prevent damage from external forces. When connecting the bellows body to the exhaust manifold, the double-ended studs are removed, and the movable flange is rotated to align with the flange holes of the exhaust manifold, facilitating the connection between the bellows body and the exhaust manifold and effectively improving work efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front view structure of the existing technology;

[0016] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the main view of this utility model;

[0018] Figure 4 This is a top view of the cross-sectional structure of the first connecting flange in this utility model;

[0019] Figure 5 This is a bottom view cross-sectional structural diagram of the second connecting flange in this utility model;

[0020] Figure 6 This is a bottom cross-sectional view of the second connecting plate located in the second groove in this utility model.

[0021] Figure 7 This is a schematic diagram of the front cross-sectional structure of the movable flange in this utility model.

[0022] Wherein: 1-First connecting flange, 2-Second connecting flange, 3-Bellwall body, 4-Engine turbine rear pipe, 5-Exhaust main pipe, 6-Groove, 7-First rotating rod, 8-Second rotating rod, 9-Sealing ring, 10-Heat insulation cotton, 11-Fixed flange, 12-Modible flange, 13-First connecting plate, 14-Second connecting plate, 15-Mounting hole, 16-Double-ended stud, 17-Fastening nut, 18-Connecting rod, 19-First groove, 20-Second groove, 21-Third groove. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0024] See Figure 2-7 An adjustable flexible exhaust bellows for a marine engine includes a bellows body 3. A first connecting flange 1 and a second connecting flange 2 are respectively provided at both ends of the bellows body 3. A movable flange 12 has multiple first connecting flange holes arranged circumferentially at equal intervals. A second connecting flange 2 has multiple second connecting flange holes arranged circumferentially at equal intervals. The first connecting flange 1 includes a fixed flange 11 and a movable flange 12. The fixed flange 11 is fixedly installed at one end of the bellows 3. The movable flange 12 has a groove 6 with a diameter matching the diameter of the fixed flange 11, and the fixed flange 11 is rotatably installed within the groove 6. Multiple first connecting flange holes are located on the movable flange 12 outside the fixed flange 11. The first connecting flange 1 at one end of the bellows body 3 is bolted to a corresponding flange on the exhaust manifold 5. The second connecting flange 2 at the other end of the bellows body 3 is bolted to a corresponding flange on the engine turbofan duct 4, thereby achieving communication between the engine turbofan duct 4, the bellows body 3, and the exhaust manifold 5.

[0025] The movable flange 12 has a first groove 19 on its side wall, within which a first connecting plate 13 is rotatably mounted. The second connecting flange 2 has a second groove 20 on its side wall, within which a second connecting plate 14 is rotatably mounted. There are two first connecting plates 13 and two second connecting plates 14, and correspondingly two first grooves 19 and two second grooves 20. The first connecting plate 13 or the second connecting plate 14 is symmetrically mounted on the first connecting flange 1 or the second connecting flange 2 about its central axis, and the first groove 19 or the second groove 20 is staggered from the holes of the first connecting flange or the second connecting flange. Both the first connecting plate 13 and the second connecting plate 14 have mounting holes 15, within which double-ended studs 16 are installed. The double-ended studs 16 sequentially penetrate the first connecting plate 13 and the second connecting plate 14. The double-ended studs 16 on both sides of the connecting plate 14, the first connecting plate 13, and the second connecting plate 14 are all threaded with fastening nuts 17. When the adjustable flexible connection exhaust bellows body of the marine engine is transported, the double-ended studs 16 can pass through the first connecting plate 13 and the second connecting plate 14 in sequence, and be threadedly connected to the double-ended studs 16 by the fastening nuts 17, thereby supporting the movable flange 12, so that the bottom surface of the sink 6 is in contact with the bottom surface of the fixed flange 11, avoiding damage to the movable flange 12 caused by external forces during transportation. When connecting the bellows body 3 to the exhaust manifold 5, the double-ended studs 16 are removed, the movable flange 12 is rotated and the multiple first connecting flange holes are aligned with the multiple flange holes on the exhaust manifold 5, which facilitates the installation of the connection between the bellows body 3 and the exhaust manifold 5 and effectively improves work efficiency.

[0026] During installation, first connect the second connecting flange hole on the second connecting flange 2 to the corresponding flange on the engine turbofan 4 with bolts. Then remove the double-ended studs 16 on the outside of the first connecting flange 1 and the second connecting flange 2, rotate the movable flange 12 so that the first connecting flange hole on the movable flange 12 corresponds one-to-one with the bolt holes on the exhaust manifold 5 flange and connect them with bolts. The adjustable flexible connecting exhaust bellows body of the marine engine can rotate 360° around its central axis through the movable flange 12, arbitrarily adjust the circumferential position of the first connecting flange hole on the movable flange 12 and match it one-to-one with the bolt holes on the flange adapted to the exhaust manifold 5, realize the prefabrication of the exhaust manifold 5, adjust and install it on site, reduce rework and improve work efficiency.

[0027] In this embodiment, a first rotating rod 7 is provided in the first groove 19, and a first connecting plate 13 is rotatably installed in the first groove 19 via the first rotating rod 7. A second rotating rod 9 is provided in the second groove 20, and a second connecting plate 14 is rotatably installed in the second groove 20 via the second rotating rod 9. Torque springs are provided between the first connecting plate 13 and the first rotating rod 7, and between the second connecting plate 14 and the second rotating rod 9. One end of the torque spring is connected to the first groove 19 or the second groove 20, and the other end of the torque spring is connected to the first connecting plate 13 or the second connecting plate 14, thereby enabling the first connecting plate 13 or the second connecting plate 14 to automatically rotate into the first groove 19 or the second groove 20.

[0028] When the first connecting block 13 or the second connecting block 14 is located in the first groove 19 or the second groove 20, the torque spring is in its normal state. When the first connecting plate 13 or the second connecting plate 14 is rotated so that the mounting hole 15 is located outside the movable flange 12 or the second connecting flange 2, the double-ended stud 16 passes through the mounting holes 15 on the first connecting plate 13 and the second connecting plate 14 in sequence and is threadedly connected to the fastening nut 17. At this time, the double-ended stud 16 supports the movable flange 12, so that the bottom of the countersunk groove 6 is in contact with the bottom surface of the fixed flange 11, thereby installing the movable flange 12 on the fixed flange 11, while preventing the movable flange 12 from being installed on the fixed flange 11. 2. Under the influence of external force, it continues to rotate to avoid damage to the adjustable flexible connection exhaust bellows of the marine engine during transportation. After the double-headed stud 16 is removed, the first connecting plate 13 and the second connecting plate 14 rotate under the action of the torque spring and enter the first groove 19 and the second groove 20 respectively. When the bellows body 3 is connected to the engine turbine pipe 4 and the exhaust manifold 5, the first connecting plate 13 and the second connecting plate 14 rotate under the action of the corresponding torque, so that the first connecting plate 13 and the second connecting plate 14 are located in the first groove 19 and the second groove 20 respectively, which can effectively reduce the space occupied by the bellows body 3.

[0029] In this embodiment, the rotation direction of the first connecting plate 13 is opposite to that of the second connecting plate 14. The first connecting plate 13 or the second connecting plate 14 automatically rotates into the first groove 19 or the second groove 20 by means of a torque spring. The rotation directions of the first connecting plate 13 and the second connecting plate 14 can be opposite by the different installation directions of the corresponding torque springs in the first groove 19 and the second groove 20.

[0030] To prevent the adjustable flexible exhaust bellows body of the marine engine from being impacted by external forces during transportation, causing the first connecting plate 13 and the second connecting plate 14 to rotate into the first groove 19 and the second groove 20, the rotation direction of the first connecting plate 13 on the movable flange 12 can be opposite to the rotation direction of the second connecting plate 14 on the second connecting flange 2. For example, the first connecting plate 13 rotates clockwise into the first groove 19, and the second connecting plate 14 rotates counterclockwise into the second groove 20.

[0031] In this embodiment, a connecting rod 18 is provided at one end of the first connecting plate 13 and the second connecting plate 14, so that the workers can rotate the first connecting block 13 and the first connecting block 14 out through the connecting rod 18; when the first connecting plate 13 or the second connecting plate 14 is located in the first groove 19 or the second groove 20, the connecting rod 18 is also located in the cavity of the first groove 19 or the second groove 20.

[0032] In this embodiment, the circumferential surface of the corrugated pipe body 3 is wrapped with heat insulation cotton 10. Adding heat insulation cotton 10 to the outside of the corrugated pipe body 3 can prevent heat from dissipating into the cabin and also prevent burns.

[0033] In this embodiment, a third groove 21 is provided on the end face of the fixed flange 11, and a sealing ring 9 is snapped into the third groove 21 to enhance the sealing between the bellows body 3 and the exhaust manifold 5.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. An adjustable flexible exhaust bellows for a marine engine, comprising a bellows body (3), wherein a first connecting flange (1) and a second connecting flange (2) are respectively provided at both ends of the bellows body (3), wherein the first connecting flange (1) is provided with a plurality of first connecting flange holes arranged circumferentially at equal intervals, and the second connecting flange (2) is provided with a plurality of second connecting flange holes arranged circumferentially at equal intervals, characterized in that, The first connecting flange (1) includes a fixed flange (11) and a movable flange (12). The fixed flange (11) is fixedly installed at one end of the bellows body (3). The movable flange (12) is provided with a countersunk groove (6). The diameter of the countersunk groove (6) is adapted to the diameter of the fixed flange (11), and the fixed flange (11) is rotatably installed in the countersunk groove (6). A plurality of the first connecting flange holes are located on the movable flange (12) outside the fixed flange (11). The side wall of the movable flange (12) is provided with a first groove (19). The first groove (19) is rotated inside the first groove. The first connecting plate (13) is provided, and the second connecting flange (2) has a second groove (20) on its side wall. The second connecting plate (14) is rotatably provided in the second groove (20). The first connecting plate (13) and the second connecting plate (14) are provided with mounting holes (15). The mounting holes (15) are provided with double-ended studs (16). The double-ended studs (16) pass through the first connecting plate (13) and the second connecting plate (14) in sequence. The double-ended studs (16) on both sides of the first connecting plate (13) and the second connecting plate (14) are threaded with fastening nuts (17).

2. The adjustable flexible exhaust bellows for a marine engine according to claim 1, characterized in that, The first groove (19) is provided with a first rotating rod (7), and the first connecting plate (13) is rotatably installed in the first groove (19) via the first rotating rod (7). The second groove (20) is provided with a second rotating rod (8), and the second connecting plate (14) is rotatably installed in the second groove (20) via the second rotating rod (8). Torque springs are provided between the first connecting plate (13) and the first rotating rod (7), and between the second connecting plate (14) and the second rotating rod (8).

3. The adjustable flexible exhaust bellows for a marine engine according to claim 2, characterized in that, The rotation direction of the first connecting plate (13) is opposite to the rotation direction of the second connecting plate (14).

4. The adjustable flexible exhaust bellows for a marine engine according to claim 3, characterized in that, A connecting rod (18) is provided at one end of both the first connecting plate (13) and the second connecting plate (14).

5. The adjustable flexible exhaust bellows for a marine engine according to claim 1, characterized in that, The circumferential surface of the corrugated pipe body (3) is covered with heat insulation cotton (10).

6. The adjustable flexible exhaust bellows for a marine engine according to claim 1, characterized in that, The end face of the fixed flange (11) is provided with a third groove (21), and a sealing ring (9) is engaged in the third groove (21).

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