Ventilation and noise reduction structure for vehicle cabin of roll-on-roll-off ship
By setting up ventilation and noise reduction areas and silencers in the fan room, the direction of noise flow is changed, which solves the problems of large space occupation and high construction difficulty of traditional silencers in the cargo hold of car roll-on/roll-off ships, and achieves the effects of noise control and cost saving.
Patent Information
- Application Number
- CN202520207156.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2035-02-10
AI Technical Summary
Traditional noise reduction devices occupy a large space in the cargo hold of car carriers, are difficult to install, and increase weight and cost. At the same time, the impact of noise on the superstructure area is difficult to control effectively.
A ventilation and noise reduction area is set up in the fan room. By using structures such as soundproof walls, soundproof dampers, silencers and sound-absorbing cotton, the direction of noise flow is changed to reduce the impact on the superstructure area. Silencing devices are also installed at the end of the cargo hold fan and ventilation system.
It effectively reduced the noise impact of the cargo hold ventilation system on the superstructure area, saved space and costs, and simplified the construction process.
Smart Images
Figure CN223494749U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of marine ventilation technology, and specifically relates to a ventilation and noise reduction structure for the vehicle compartment of a roll-on / roll-off ship. Background Technology
[0002] In car carrier roll-on / roll-off (Ro-Ro) vessels, the ventilation fan rooms for the cargo holds are located at the top of the deck. Due to the ship's structural layout, ventilation for each cargo hold extends through structural ducts to the top open deck, where the fan rooms are situated. To prevent the hull from being contaminated by wastewater flowing from the louvers or demisters at the ventilation openings—which would leave unsightly marks and be difficult to clean over time—the louvers or demisters are typically designed to face inwards rather than on the hull. However, the superstructure area on the top open deck contains living quarters and other public activity areas with high noise control requirements. Noise transmitted from the louvers or demisters at the end of the cargo hold ventilation system can impact this area. While there are typically noise control standards for both inside and outside the cargo holds, traditional solutions involve installing sound-absorbing discs or cylindrical silencers. However, these devices require significant space, making installation difficult due to space constraints, and increasing weight and cost. Utility Model Content
[0003] To address the aforementioned issues, this utility model provides a ventilation and noise reduction structure for the vehicle compartment of a roll-on / roll-off ship, effectively solving the noise impact of the cargo hold fan room on the superstructure area of a roll-on / roll-off car carrier, while saving space and costs.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A ventilation and noise reduction structure for a roll-on / roll-off ship vehicle compartment includes a fan room, which includes a ventilation area and a ventilation and noise reduction area. The ventilation and noise reduction area is located on the side of the ventilation area close to the superstructure area. The ventilation and noise reduction area is surrounded by a sound-absorbing wall, and ventilation holes are provided on the sound-absorbing wall at the top of the ventilation and noise reduction area.
[0006] Furthermore, a vertical bulkhead is provided inside the wind turbine room, which is perpendicular to the open deck and the top bulkhead of the wind turbine room. A louver or demister is provided on the side of the vertical bulkhead near the ventilation and noise reduction area.
[0007] Furthermore, the vertical bulkhead is located at the boundary between the ventilation area and the ventilation and noise reduction area.
[0008] Furthermore, the ventilation area extends upwards from the top deck through the open deck, and the ventilation and noise reduction area is located on the open deck.
[0009] Furthermore, a cargo hold fan is provided inside the ventilation area, a silencer is provided at the air outlet of the cargo hold fan, and a silencer is provided at the air inlet of the cargo hold fan. The silencer is fixed to the top deck, and a ventilation opening is provided on the top deck. The air outlet of the silencer is positioned opposite to the ventilation opening on the top deck.
[0010] Furthermore, sound-absorbing cotton is laid on the inner wall of the ventilation area located above the open deck, and a sound-absorbing perforated plate is fixed on the outer wall of the sound-absorbing cotton.
[0011] Furthermore, the silencer is a cylindrical silencer.
[0012] This utility model relates to a ventilation and noise reduction structure for the vehicle compartment of a roll-on / roll-off ship. The installation of sound-insulating walls and sound-absorbing dampers in the cargo hold fan room, as well as the arrangement of sound-absorbing perforated plates and sound-absorbing cotton, effectively solves the noise impact of the cargo hold ventilation system of a roll-on / roll-off ship on the superstructure area. It also effectively solves the problem of difficult construction of sound-absorbing sheets and round-tube silencers, while reducing weight and saving space and cost. Attached Figure Description
[0013] Figure 1 This is a side view of the ventilation and noise reduction structure for the vehicle compartment of a roll-on / roll-off ship described in this utility model.
[0014] Figure 2 This is a top view of the ventilation and noise reduction structure for the vehicle compartment of the roll-on / roll-off ship described in this utility model.
[0015] Among them, 1-cargo hold air duct; 2-silencing airlock; 3-cargo hold fan; 4-hull plating; 5-cylindrical silencer; 6-sound-absorbing perforated plate; 7-sound-absorbing cotton; 8-fan room; 9-ventilation hole; 10-louver or demister; 11-soundproof wall; 12-open deck; 13-top deck; 14-superstructure area; 15-vertical bulkhead; 81-ventilation area; 82-ventilation and noise reduction area. Detailed Implementation
[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0017] like Figure 1-2As shown, a ventilation and noise reduction structure for a roll-on / roll-off (Ro-Ro) ship vehicle compartment includes a fan room 8. The fan room 8 includes a ventilation area 81 and a ventilation and noise reduction area 82. The ventilation area 81 extends from the top deck upwards through the open deck 12. The ventilation and noise reduction area 82 is located on the open deck 12. The air outlet of the ventilation area 81 is connected to the cargo hold air duct 1 located below the top deck 13. The side wall of the ventilation area 81 near the hull is the hull plating 4. The ventilation and noise reduction area 82 is located on the side of the ventilation area 81 near the superstructure area 14. The ventilation and noise reduction area 82 is surrounded by a sound-damping wall 11. Ventilation holes 9 are provided on the sound-damping wall 11 at the top of the ventilation and noise reduction area 82. A vertical bulkhead 15 is provided inside the fan room 8, perpendicular to the open deck 12 and the top bulkhead of the fan room 8. Louvers or demisters 10 are provided on the side of the vertical bulkhead 15 near the ventilation and noise reduction area 82. The vertical bulkhead 15 is located at the junction of the ventilation area 81 and the ventilation and noise reduction area 82.
[0018] A cargo hold fan 3 is installed inside the ventilation area 81. A silencer 2 is installed at the air outlet of the cargo hold fan 3. A cylindrical silencer 5 is installed at the air inlet of the cargo hold fan 3. The silencer 2 is fixed on the top deck 13. A ventilation opening is provided on the top deck 13. The air outlet of the silencer 2 is arranged opposite to the ventilation opening on the top deck 13. Sound-absorbing cotton 7 is laid on the inner wall of the ventilation area 81 located above the open deck 12. A sound-absorbing perforated plate 6 is fixed on the outer wall of the sound-absorbing cotton 7.
[0019] The noise source of the PCTC (Carpool Carrier) cargo hold ventilation system mainly comes from the cargo hold fan 3. The noise impact of the cargo hold ventilation system on the interior of the cargo hold is mainly transmitted to the cargo hold through the cargo hold duct 1. If a sound-absorbing plate or cylindrical silencer is installed in the cargo hold duct 1, it will require a lot of space, making construction difficult and increasing weight and cost. Therefore, under the premise of meeting the noise index, in this embodiment, a sound-absorbing damper 2 is installed between the cargo hold duct 1 and the cargo hold fan 3 to reduce noise, since the damper is originally required. The noise impact of the cargo hold ventilation system on the outside of the cargo hold is mainly transmitted through the louvers or demisters 10 at the end of the cargo hold ventilation system. In this embodiment, a silencer 5 is installed at the end of the cargo hold fan 3 to reduce some of the noise. At the same time, sound-absorbing perforated plates 6 and sound-absorbing cotton 7 are installed on the top and side walls of the fan room to absorb some of the noise. However, if the louvers or demisters 10 at the end of the cargo hold ventilation system are directly facing the superstructure area and are very close, a sound barrier 11 is set up in this embodiment to block the noise and change the airflow direction of the cargo hold ventilation so that the noise is transmitted upward through the ventilation opening 9 instead of being directly facing the superstructure area to the side. This can effectively control the impact of the noise of the cargo hold ventilation system on the superstructure area.
[0020] Those skilled in the art should understand that the above description is merely a specific embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A ventilation and noise reduction structure for the vehicle compartment of a roll-on / roll-off ship, characterized in that, It includes a fan room, which includes a ventilation area and a ventilation and noise reduction area. The ventilation and noise reduction area is located on the side of the ventilation area close to the upper building area. The ventilation and noise reduction area is surrounded by a sound-absorbing wall, and ventilation holes are provided on the sound-absorbing wall at the top of the ventilation and noise reduction area.
2. The ventilation and noise reduction structure for a roll-on / roll-off ship vehicle compartment according to claim 1, characterized in that, Inside the wind turbine room, there is a vertical bulkhead that is perpendicular to the open deck and the top bulkhead of the wind turbine room. On the side of the vertical bulkhead near the ventilation and noise reduction area, there are louvers or demisters.
3. The ventilation and noise reduction structure for a roll-on / roll-off ship vehicle compartment according to claim 2, characterized in that, The vertical bulkhead is located at the boundary between the ventilation area and the ventilation and noise reduction area.
4. A ventilation and noise reduction structure for a roll-on / roll-off ship vehicle compartment according to claim 2 or 3, characterized in that, The ventilation zone extends upwards from the top deck through the open deck, and the ventilation and noise reduction zone is located on the open deck.
5. The ventilation and noise reduction structure for a roll-on / roll-off ship vehicle compartment according to claim 1, characterized in that, A cargo hold fan is installed inside the ventilation area. A silencer is installed at the air outlet of the cargo hold fan and a silencer is installed at the air inlet of the cargo hold fan. The silencer is fixed to the top deck. A ventilation opening is provided on the top deck. The air outlet of the silencer is positioned opposite to the ventilation opening on the top deck.
6. The ventilation and noise reduction structure for a roll-on / roll-off ship vehicle compartment according to claim 2, characterized in that, Sound-absorbing cotton is laid on the inner wall of the ventilation area located above the open deck, and a sound-absorbing perforated plate is fixed on the outer wall of the sound-absorbing cotton.
7. A ventilation and noise reduction structure for a roll-on / roll-off ship vehicle compartment according to claim 5, characterized in that, The silencer is a cylindrical silencer.