Novel jet flow ventilation system for ship roll-on-roll-off place

Abstract

The utility model provides a novel jet flow ventilation system for a ship roll-on-roll-off station, which comprises at least one jet flow ventilation device, and each jet flow ventilation device is arranged along the width of a ship and is fixed on the top in the roll-on-roll-off station; the jet ventilation device comprises a horn mouth, a fan, a ventilation header pipe and a plurality of ventilation branch pipes, the inlet end of the horn mouth is an air inlet of the jet ventilation device, the horn mouth and the ventilation header pipe are arranged at the inlet end and the outlet end of the fan respectively, and the ventilation header pipe and the fan are fixedly connected with the ship body structure through a support; the multiple ventilation branch pipes are arranged in parallel at intervals in the length direction of the ventilation main pipe, and air outlet nozzles are connected to the outlet ends of the ventilation branch pipes. The novel jet flow ventilation system for the ship roll-on-roll-off position is simple in structure, small in number of air channels, convenient to arrange, low in energy consumption and capable of efficiently improving the air quality in the ship roll-on-roll-off position.

Description

Technical Field

[0001] The utility model belongs to the technical field of ship ventilation, and particularly relates to a novel jet ventilation system for a roll-on / roll-off location of a ship. Background Art

[0002] Vehicles in the ro-ro spaces of ro-ro passenger ships, ro-ro ships and car carriers will produce harmful gases, which need to be continuously ventilated, and the fresh air outside the ship is used to dilute and discharge the harmful gases in the vehicle compartment. According to the requirements of the International Maritime Organization, in order to protect the health of the crew and the safety of the ro-ro spaces, the ventilation flow field in the ro-ro spaces needs to be uniform to avoid poor ventilation "dead zones" and "stratification". Due to the large volume of the vehicle compartment, there are also stairways, chimneys and other arrangements, and it is impossible to arrange the air outlets evenly. It is difficult to avoid ventilation "dead zones" with conventional designs. Due to the long length of the ship's ro-ro spaces, some of which are up to 200 meters, "stratification" is prone to occur during the airflow movement, that is, the upper airflow of the ro-ro space is not exchanged with the lower airflow, resulting in the fresh air entering the ro-ro space from the outside in winter due to the low temperature and moving in the lower part, while the fresh air entering the ro-ro space from the outside in summer due to the high temperature and moving in the upper part, which leads to low ventilation efficiency and poor air quality in the ro-ro space.

[0003] In order to reduce the "dead zone" and "stratification" of the ventilation flow field, a large number of air ducts and ventilation equipment need to be arranged, which greatly increases the design difficulty and construction cost of the ship. Utility Model Content

[0004] In view of the above problems, the utility model provides a novel jet ventilation system for a ship's ro-ro space, which has a simple structure, few air ducts, is easy to arrange, has low energy consumption, and can efficiently improve the air quality in the ship's ro-ro space.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A new type of jet ventilation system for a ro-ro space of a ship comprises at least one jet ventilation device, each of which is arranged along the width of the ship and fixed on the top of the ro-ro space; the jet ventilation device comprises a bell mouth, a fan, a ventilation main pipe and a plurality of ventilation branches, the inlet end of the bell mouth is the air inlet of the jet ventilation device, the bell mouth and the ventilation main pipe are respectively arranged at the inlet end and the outlet end of the fan, the ventilation main pipe and the fan are fixedly connected to the hull structure through a bracket, the plurality of ventilation branches are arranged in parallel at intervals along the length direction of the ventilation main pipe, and an air outlet nozzle is connected to the rear end of the ventilation branch pipe.

[0007] Furthermore, the plurality of ventilation branch pipes are located on the same side of the ventilation main pipe, the ventilation branch pipes are arranged obliquely downward relative to the central axis of the ventilation main pipe, and the air outlet nozzles are arranged coaxially with the ventilation branch pipes.

[0008] Furthermore, the air outlet nozzles, ventilation main pipes and ventilation branches are all arranged on the lower panel of the beam on the top deck of the roll-on / roll-off space.

[0009] Furthermore, silencers are provided at both the inlet and outlet ends of the fan.

[0010] Furthermore, the fan is arranged at the top of the roll-on / roll-off space, the fan is an axial flow fan, has a spark-free structure, and the fan motor is explosion-proof.

[0011] Furthermore, the air outlet nozzle is a tapered nozzle with a diameter that gradually decreases along the gas flow direction.

[0012] Furthermore, the large diameter end of the bell mouth is an inlet end, and a wire mesh is provided on the inlet end of the bell mouth.

[0013] Furthermore, when the stern shutters on the starboard side of the ship cannot be arranged at the stern due to the actual situation of the ship, the jet ventilation system is used to improve the local ventilation flow field of the ro-ro space of the ship. At this time, the number of the jet ventilation device is 1, and the jet ventilation device is arranged opposite to the shutters on the port side of the ship, and the bell mouth is arranged adjacent to the shutters on the port side; an air quality sensor is arranged in front of the outermost air outlet nozzle at the end of the ventilation main pipe away from the fan,

[0014] Furthermore, when the jet ventilation system is used to improve the overall ventilation flow field of the roll-on / roll-off space of a ship, there are multiple jet ventilation devices, and the multiple jet ventilation devices are arranged at intervals in the midship of the ship along the length of the ship; two air quality sensors are arranged opposite to each other on the front side at both ends of each jet ventilation device, and the air quality sensors are electrically connected to the fan control box.

[0015] Furthermore, the air quality sensor includes a carbon monoxide probe, a nitrogen oxide probe and a combustible gas probe.

[0016] The utility model of the new jet ventilation system for the ro-ro space of the ship solves the problem of poor ventilation in the ro-ro space of the ship. In terms of improving the local flow field, the airflow blown out by the outlet nozzle is fresh air, and the fresh air can be accurately delivered to the poorly ventilated position. The traditional jet ventilation method (see Figure 5 ) has a relatively close air outlet and inlet, and uses the air in the ro-ro space to achieve the jet effect, while this solution uses fresh air to achieve the jet, and the air outlet nozzles and bell mouths are arranged in different places, which has high flexibility in design and high ventilation efficiency. In terms of overall process improvement, one fan can carry 4 air outlet nozzles, which are arranged horizontally in the ro-ro space of the ship, with high ventilation efficiency. Compared with the traditional jet ventilation method, the number of jet fans can be greatly reduced.

[0017] In addition, this technical solution has the advantages of fewer air ducts, small space occupation, light weight, low noise, simple control logic, and low cost, and is worthy of wide application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the jet ventilation device described in the utility model;

[0019] Figure 2 It is a schematic diagram of the arrangement of the air outlet nozzles described in the utility model;

[0020] Figure 3 It is a schematic diagram of the arrangement of the jet ventilation system described in the utility model for improving the local ventilation flow field;

[0021] Figure 4 It is a schematic diagram of the arrangement of the jet ventilation system described in the utility model for improving the overall ventilation flow field;

[0022] Figure 5 It is a traditional jet ventilation method.

[0023] Among them, 1- bell mouth, 2- fan, 3- ventilation main pipe, 4- ventilation branch pipe, 5- silencer, 6- air outlet nozzle, 7- beam, 8- top deck, 9- stern door, 10- bow fan, 11- port stern shutter, 12- starboard stern shutter, 13- air quality sensor. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1-Figure 2As shown, a new type of jet ventilation system for a ro-ro space of a ship comprises at least one jet ventilation device, each of which is arranged along the width of the ship and fixed on the top of the ro-ro space; the jet ventilation device comprises a bell mouth 1, a fan 2, a ventilation main pipe 3 and a plurality of ventilation branches 4, the inlet end of the bell mouth 1 is the air inlet of the jet ventilation device, the bell mouth 1 and the ventilation main pipe 3 are respectively arranged at the inlet end and the outlet end of the fan 2, the ventilation main pipe 3 and the fan 2 are fixedly connected to the hull structure through a bracket, and a silencer is arranged at the inlet end and the outlet end of the fan 2. device 5; a plurality of ventilation branch pipes 4 are arranged in parallel and at intervals on the same side of the ventilation main pipe 3 along the length direction of the ventilation main pipe 3; an air outlet nozzle 6 is connected to the rear end of the ventilation branch pipe 4, and the air outlet nozzle 6 is arranged coaxially with the ventilation branch pipe 4; the ventilation branch pipe 4 is arranged obliquely downward relative to the central axis of the ventilation main pipe 3 to reduce the influence of the beam on the airflow; the end of the ventilation main pipe 3 away from the fan 2 is an open structure; the air outlet nozzle 6, the ventilation main pipe 3 and the ventilation branch pipe 4 are all arranged on the lower panel of the beam 7 on the top deck 8 of the ro-ro space to avoid affecting the loading height of the ro-ro space of the ship.

[0026] The large diameter end of the bell mouth 1 is the inlet end, and a wire mesh is provided on the inlet end of the bell mouth 1; the fan 2 is arranged at the top of the roll-on / roll-off place, the fan 2 is an axial flow fan 2, has a spark-free structure, and the fan 2 motor is explosion-proof; the air outlet nozzle 6 is a tapered nozzle with a gradually decreasing diameter along the gas flow direction.

[0027] like Figure 3 As shown, when sailing at sea, the stern door 9 is closed, the bow fan 10 is turned on, the port stern shutter 11 is opened, and the starboard stern shutter 12 cannot be arranged at the stern due to the actual situation of the ship, resulting in poor ventilation in the area from the stern door 9 to the starboard stern shutter 12. This area is arranged with stairs, chimneys and other factors, and it is impossible to open holes on the side to arrange shutters. At this time, the jet ventilation system is used to improve the local ventilation flow field of the ship's roll-on / roll-off space. The number of the jet ventilation devices is 1, and the jet ventilation device is arranged opposite to the port side shutter of the ship, and the bell mouth 1 is arranged adjacent to the port side shutter; an air quality sensor 13 is provided on the front side of the outermost air outlet nozzle 6 at the end of the ventilation main pipe 3 away from the fan 2.

[0028] After the new jet ventilation system is arranged, the bell mouth 1 is arranged near the shutter 11 at the port stern, and the fan 2 can inhale the fresh air entering the ro-ro space from the shutter 11 at the port stern, while the air outlet nozzle 6 is arranged in the poorly ventilated area, and the fresh air can be ejected from the air outlet nozzle 6 at high speed, thereby improving the flow field in this area;

[0029] An air quality sensor 13 is arranged in the poorly ventilated area. It includes three probes (carbon monoxide, nitrogen oxides and combustible gas). When it detects that the pollutants exceed the limit, the jet ventilation system is started. When the air quality sensor 13 does not alarm, the ventilation system is not started, avoiding the fan 2 from running all the time and wasting energy.

[0030] like Figure 4 As shown, since the length of the ro-ro space of the ship is relatively long, and the ventilation inlets and outlets are arranged at the bow and stern of the ship, this will cause a "stratification" phenomenon in the process of airflow flowing from the stern to the bow. Therefore, the jet ventilation system is arranged at a certain distance in the middle of the ro-ro space, and is controlled according to the signal of the air quality sensor 13. The jet ventilation system of the utility model can be used to improve the overall ventilation flow field of the ro-ro space of the ship. At this time, the number of the jet ventilation devices is multiple, and the multiple jet ventilation devices are arranged at intervals in the middle of the ship along the length of the ship; two air quality sensors 13 are arranged opposite to each other on the front side of the two ends of each jet ventilation device, and the air quality sensor 13 is electrically connected to the fan 2 control box.

[0031] A person skilled in the art should understand that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of jet ventilation system for ro-ro spaces of ships, characterized in that: It comprises at least one jet ventilation device, each of which is arranged along the width of the ship and fixed on the top of the roll-on / roll-off space; the jet ventilation device comprises a bell-shaped mouth, a fan, a ventilation main pipe and a plurality of ventilation branches, the inlet end of the bell-shaped mouth is the air inlet of the jet ventilation device, the bell-shaped mouth and the ventilation main pipe are respectively arranged at the inlet end and the outlet end of the fan, the ventilation main pipe and the fan are fixedly connected to the hull structure through a bracket, the plurality of ventilation branches are arranged in parallel at intervals along the length direction of the ventilation main pipe, and an air outlet nozzle is connected to the outlet end of the ventilation branch pipe.

2. A novel jet ventilation system for a ship's ro-ro space according to claim 1, characterized in that: The plurality of ventilation branch pipes are located on the same side of the ventilation main pipe, the ventilation branch pipes are arranged obliquely downward relative to the central axis of the ventilation main pipe, and the air outlet nozzles are arranged coaxially with the ventilation branch pipes.

3. A novel jet ventilation system for a ship's ro-ro space according to claim 2, characterized in that: The air outlet nozzles, ventilation main pipes and ventilation branches are all arranged on the lower panel of the beam on the top deck of the roll-on / roll-off space.

4. A novel jet ventilation system for a ship's ro-ro space according to claim 1, characterized in that: Mufflers are provided at both the inlet and outlet ends of the fan.

5. A new type of jet ventilation system for a ship's ro-ro space according to claim 4, characterized in that: The fan is arranged at the top of the roll-on / roll-off space, is an axial flow fan, has a spark-free structure, and the fan motor is explosion-proof.

6. A new type of jet ventilation system for a ship's ro-ro space according to claim 1, characterized in that: The air outlet nozzle is a tapered nozzle with a diameter that gradually decreases along the gas flow direction.

7. A new type of jet ventilation system for a ship's ro-ro space according to claim 1, characterized in that: The large diameter end of the bell mouth is the inlet end, and a steel wire mesh is arranged on the inlet end of the bell mouth.

8. A new type of jet ventilation system for a ship's ro-ro space according to claim 1, characterized in that: When the stern shutters on the starboard side of the ship cannot be arranged at the stern due to the actual situation of the ship, the jet ventilation system is used to improve the local ventilation flow field of the roll-on / roll-off space of the ship. At this time, the number of the jet ventilation device is 1, and the jet ventilation device is arranged opposite to the shutters on the port side of the ship, and the bell mouth is arranged adjacent to the shutters on the port side; an air quality sensor is provided in front of the outermost air outlet nozzle at the end of the ventilation main pipe away from the fan.

9. A new type of jet ventilation system for a ship's ro-ro space according to claim 8, characterized in that: When the jet ventilation system is used to improve the overall ventilation flow field of the roll-on / roll-off space of a ship, there are multiple jet ventilation devices, and the multiple jet ventilation devices are arranged at intervals in the midship of the ship along the length of the ship; two air quality sensors are arranged opposite to each other on the front side at both ends of each jet ventilation device, and the air quality sensors are electrically connected to the fan control box.

10. A new type of jet ventilation system for a ship's ro-ro space according to claim 9, characterized in that: The air quality sensor includes a carbon monoxide sensor, a nitrogen oxide sensor and a combustible gas sensor.

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