Rotary air duct combined with ventilation mast on liquefied gas carrier

Abstract

The utility model relates to a rotary air duct combined with a ventilation mast on a liquefied gas carrier, which comprises a base, a support shaft arranged on the base and an air duct mounted outside the support shaft, the support shaft is connected with the air duct through a bearing, and the support shaft is further provided with a driving device which is in transmission connection with the air duct and is used for driving the air duct to rotate relative to the support shaft; the base is arranged on a deck, and the ventilation mast upwards penetrates through the base and the supporting shaft from the lower portion of the deck and extends out of the upper portion of the supporting shaft. The rotary air duct combined with the ventilation mast on the liquefied gas carrier has the advantages that the rotary air duct and the ventilation mast are combined, the rotary air duct and the ventilation mast are arranged in one space at the same time, and the problem that the space for arranging the rotary air duct is limited due to the fact that a large number of devices are arranged on a deck is solved.

Description

Technical Field

[0001] This utility model relates to the field of ship design, specifically to a rotating ventilation duct combined with a ventilated mast on a liquefied gas ship. Background Technology

[0002] To achieve energy conservation, emission reduction, and environmental protection, more and more ships are beginning to apply energy-saving devices. Among them, rotary ventilation ducts can utilize wind energy to provide auxiliary propulsion for ships, thereby achieving certain energy conservation and emission reduction goals. However, due to the large amount of equipment on the deck of liquefied gas carriers, the remaining space is relatively limited for installing ventilation ducts, making it difficult to install rotary ventilation ducts on liquefied gas carriers. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a rotating duct combined with a ventilated mast on an LPG ship. The rotating duct and the ventilated mast are integrated into a layout that reduces the space occupied. It can satisfy both the function of the ventilated mast and the layout requirements of the rotating duct, and the two will not interfere with each other.

[0004] The technical objective of this utility model is achieved through the following technical solution:

[0005] A rotating ventilation duct combined with a ventilated mast on a liquefied gas carrier includes:

[0006] The system includes a base, a support shaft mounted on the base, and a duct installed outside the support shaft. The support shaft and the duct are connected by bearings. The support shaft is also equipped with a drive device that is connected to the duct for driving the duct to rotate relative to the support shaft. The base is located on the deck, and the ventilated mast passes through the base and the support shaft from below the deck and extends from above the support shaft.

[0007] Furthermore, an upper cover for the ventilation duct and a maintenance platform located above the upper cover are also provided. The upper cover for the ventilation duct is fixedly connected to the ventilation mast near the top.

[0008] Furthermore, bearings are installed on the inner wall of the duct at the upper end near the support shaft and at the lower end near the support shaft, respectively.

[0009] Furthermore, a first inclined support surface is provided on the upper edge of the support shaft, a support member is provided on the inner wall of the air duct corresponding to the inclined support surface, and a second inclined support surface parallel to the first inclined support surface is provided on the support member corresponding to the first inclined support surface; the bearing is provided between the first inclined support surface and the second inclined support surface.

[0010] Furthermore, the bearing between the first inclined support surface and the second inclined support surface is a tapered roller bearing, and the bearing on the inner wall of the air duct near the bottom of the support shaft is a thrust roller bearing, which is located between the inner wall of the air duct and the outer wall of the support shaft.

[0011] Furthermore, the drive device includes a drive motor and a gear transmission device. A ring gear is installed on the inner wall of the air duct. The drive motor is connected to the ring gear through the gear transmission device. The gear transmission device and the ring gear are connected at the upper end of the support shaft.

[0012] Furthermore, the ventilated mast includes a ventilated mast riser pipe and a ventilated cap. The ventilated mast riser pipe extends from below the deck, passes through the base and support shaft, and extends to the upper end of the duct. The ventilated mast riser pipe passes through the upper end cover of the duct and the central area of ​​the maintenance platform. The ventilated cap is located above the maintenance platform.

[0013] Furthermore, several working platforms are also installed inside the support shaft.

[0014] Furthermore, a gas detection device is installed inside the support shaft to detect whether there is any hazardous gas inside the support shaft.

[0015] Furthermore, the base is also equipped with ventilation openings and inspection doors, and the interior of the base is connected to the interior of the support shaft.

[0016] Compared with the prior art, the beneficial effect of this utility model is that the rotating duct combined with the ventilated mast on the liquefied gas ship solves the problem of limited space for arranging rotating ducts on the deck due to the large number of equipment. In addition, it can also reduce the obstruction of the bridge's view after adding the rotating duct. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the rotating ventilation duct structure of the LPG ship combined with the ventilated mast according to this utility model.

[0018] Figure 2 This is a partially enlarged schematic diagram of the upper end of the support shaft in this utility model.

[0019] In the picture:

[0020] 1. Base; 2. Support shaft; 3. Ventilation duct; 4. Deck; 5. Working platform; 6. Ventilation opening; 7. Inspection door; 8. Gas detection device; 9. Ventilation duct upper cover; 10. Roller bearing; 11. Ventilation mast riser pipe; 12. Ventilation cap; 13. Support component; 14. Tapered roller bearing; 15. Thrust roller bearing; 16. Drive motor; 17. Gear transmission device; 18. Local control system; 19. Temperature detection device; 20. Straight ladder; 21. First inclined support surface; 22. Second inclined support surface; 23. Ring gear. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to specific embodiments:

[0022] A rotating ventilation duct combined with a ventilated mast on a liquefied gas vessel, such as Figure 1 As shown, it includes:

[0023] The base 1, the support shaft 2 set on the base 1, and the air duct 3 installed outside the support shaft 2 are connected by bearings. The support shaft 2 is also equipped with a drive device that is connected to the air duct 3 to drive the air duct 3 to rotate relative to the support shaft 2. The base 1 is arranged on the deck 4, which is an open deck. The ventilated mast passes through the base 1 and the support shaft 2 from below the deck and extends from above the support shaft 2.

[0024] The support shaft 2 also has several working platforms 5 inside, and the base 1 has ventilation openings 6 and inspection doors 7. The interior of the base 1 is connected to the interior of the support shaft 2. The inspection doors 7 facilitate personnel access to the interior of the base, working platforms 6, or inspection platforms. The ventilation openings 6 ensure ventilation inside the base 1 and the support shaft 2. A straight ladder 20 is installed inside the base 1, through which personnel can access the working platforms 6 inside the support shaft. The upper and lower working platforms 6 are also connected by straight ladders 20. A straight ladder 20 is also installed between the top of the support shaft 2 and the inspection platform. In this embodiment, the straight ladder 20 extends along the height direction of the ventilation mast riser pipe 11.

[0025] Preferably, a gas detection device 8 is also installed inside the support shaft 2 to detect whether there is any hazardous gas inside the support shaft 2. The gas detection device 8 detects whether there is any hazardous gas inside the support shaft 2. Hazardous gases generally originate from liquefied gas loaded or transported in liquefied gas carriers, such as liquid hydrogen carriers, LNG dual-fuel carriers, ethane carriers, LPG carriers, LNG bunkering carriers, FSRU carriers, and LNG carriers. Preferably, a temperature detection device 19 can also be installed inside the support shaft.

[0026] A local control system 18 can also be installed on the work platform to facilitate the control of all electrical equipment inside the ventilation duct.

[0027] To prevent rainwater and waves from entering the ventilation duct 3, an upper cover 9 is installed at the top of the ventilation duct 3. Due to the presence of the ventilation mast, the upper cover 9 is not fixedly connected to the ventilation duct 3; instead, the upper cover 9 is fixedly connected to the ventilation mast. A maintenance platform is installed above the upper cover 9. In this embodiment, the maintenance platform is constructed using the upper surface of the upper cover 9, and a guardrail is added above the upper cover 9 to form the maintenance platform. Preferably, to enhance the sealing effect of the upper cover 9, the lower end of the upper cover 9 is rotatably connected to the inner wall of the upper end of the ventilation duct via a roller bearing 10.

[0028] Specifically, the ventilated mast includes a ventilated mast riser pipe 11 and a ventilated cap 12. The ventilated mast riser pipe 11 passes through the base 1 and the support shaft 2 from the bottom of the deck 4 and extends to the upper end of the ventilated duct 3. The ventilated mast riser pipe 11 passes through the upper end cover 9 of the ventilated duct and the central area of ​​the maintenance platform. The ventilated cap 12 is set above the maintenance platform.

[0029] Preferably, bearings are installed on the inner wall of the duct at the upper end near the support shaft and at the lower end near the support shaft to increase the stability of the duct rotation.

[0030] As a preferred option, such as Figure 2 As shown, the upper edge of the support shaft 2 is provided with a first inclined support surface 21, and the inner wall of the air duct 3 is provided with a support member 13 corresponding to the inclined support surface. The support member 13 is provided with a second inclined support surface 22 parallel to the first inclined support surface 21. The bearing is disposed between the first inclined support surface 21 and the second inclined support surface 22. In this embodiment, the support member 13 is an annular structure fixed to the inner wall of the air duct 3, and the second inclined support surface 22 is provided below the annular structure.

[0031] Among them, the bearing between the first inclined support surface 21 and the second inclined support surface 22 is a tapered roller bearing 14, and the bearing on the inner wall of the air duct near the bottom of the support shaft is a thrust roller bearing 15, which is disposed between the inner wall of the air duct and the outer wall of the support shaft.

[0032] Specifically, the driving device includes a drive motor 16 and a gear transmission device 17. A ring gear 23 is arranged on the inner wall of the air duct, and the ring gear 23 is arranged in a circle inside the air duct. The drive motor 16 is connected to the ring gear through the gear transmission device 17. The gear transmission device 17 and the ring gear are connected to each other at the upper end of the support shaft 2. In this embodiment, a ring gear is arranged in the inner ring of the support member of the ring structure. The drive motor 16 is installed inside the support shaft 2, and the output axis of the drive motor 16 extends upward and is connected to the gear transmission device 17.

[0033] This embodiment is merely a further explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art can make non-inventive modifications to this embodiment as needed, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A rotary ventilation duct combined with a ventilated mast on a liquefied gas vessel, characterized in that, include: The system includes a base, a support shaft mounted on the base, and a duct installed outside the support shaft. The support shaft and the duct are connected by bearings. The support shaft is also equipped with a drive device that is connected to the duct for driving the duct to rotate relative to the support shaft. The base is arranged on the deck, and the ventilated mast passes through the base and the support shaft from below the deck and extends from above the support shaft.

2. The rotary ventilation duct combined with a ventilated mast on a liquefied gas vessel according to claim 1, characterized in that, Above the ventilation duct is a ventilation duct top cover and a maintenance platform located above the ventilation duct top cover. The ventilation duct top cover is fixedly connected to the ventilation mast near the top.

3. A rotary ventilation duct combined with a ventilated mast on a liquefied gas vessel according to claim 2, characterized in that, Bearings are respectively installed on the inner wall of the air duct at the upper end near the support shaft and at the lower end near the support shaft.

4. A rotary ventilation duct combined with a ventilated mast on a liquefied gas vessel according to claim 3, characterized in that, The upper edge of the support shaft is provided with a first inclined support surface, the inner wall of the air duct is provided with a support member corresponding to the inclined support surface, and the support member is provided with a second inclined support surface parallel to the first inclined support surface; the bearing is provided between the first inclined support surface and the second inclined support surface.

5. A rotary ventilation duct combined with a ventilated mast on a liquefied gas vessel according to claim 4, characterized in that, The bearing between the first inclined support surface and the second inclined support surface is a tapered roller bearing, and the bearing on the inner wall of the air duct near the bottom of the support shaft is a thrust roller bearing. The thrust roller bearing is located between the inner wall of the air duct and the outer wall of the support shaft.

6. A rotary ventilation duct combined with a ventilated mast on a liquefied gas vessel according to claim 1, characterized in that, The driving device includes a drive motor and a gear transmission device. A ring gear is provided on the inner wall of the air duct. The drive motor is connected to the ring gear through the gear transmission device. The gear transmission device and the ring gear are connected at the upper end of the support shaft.

7. A rotary ventilation duct combined with a ventilated mast on a liquefied gas vessel according to claim 2, characterized in that, The ventilated mast includes a ventilated mast riser pipe and a ventilated cap. The ventilated mast riser pipe extends from below the deck, passes through the base and support shaft, and extends to the upper end of the wind tunnel. The ventilated mast riser pipe passes through the upper end cover of the wind tunnel and the central area of ​​the maintenance platform. The ventilated cap is located above the maintenance platform.

8. A rotary ventilation duct combined with a ventilated mast on a liquefied gas vessel according to claim 1, characterized in that, The support shaft also has several layers of working platforms inside.

9. A rotary ventilation duct combined with a ventilated mast on a liquefied gas vessel according to claim 8, characterized in that, The support shaft is also equipped with a gas detection device to detect whether there is a dangerous gas inside the support shaft.

10. A rotary ventilation duct combined with a ventilated mast on a liquefied gas vessel according to claim 1, characterized in that, The base is also provided with ventilation openings and inspection doors, and the interior of the base is connected to the interior of the support shaft.

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