Unpowered air duct for ship

Abstract

The invention relates to the technical field of ship structures, and discloses an unpowered air duct for a ship, which comprises an air duct body, an air cap, a weather-tight cover and a driving assembly, the air cap is sleeved on the top of the air duct body, the air cap is provided with a ventilation opening, and the weather-tight cover is positioned between the air cap and the air duct body; the driving assembly is in transmission connection with the weather-tight cover to drive the weather-tight cover to vertically lift, and the weather-tight cover has an opening state for communicating the air duct body with the ventilation opening and a closing state for sealing the air duct body in the lifting stroke; the air duct further comprises a Bernoulli pipe, a support is arranged on the side, facing the air duct body, of the weather tight cover, the Bernoulli pipe is fixedly connected with the support, the vertical projection of the Bernoulli pipe is located in the air duct body, the Bernoulli pipe is provided with an inlet end close to the ventilation opening and an outlet end away from the ventilation opening, and the inner diameter of the inlet end is larger than that of the outlet end. The airflow forms high-speed airflow when being discharged from the outlet end, the airflow in the air duct body is driven to flow into the air cap, and the natural ventilation effect of a cabin is optimized.

Description

Technical Field

[0001] The invention relates to the technical field of ship structures, in particular to an unpowered wind tube for ships. Background Art

[0002] The ship's ventilation system is a piping system that uses mechanical means or relies on the natural circulation of air to ventilate the ship's cabins. The ship's ventilation system is divided into two types: mechanical ventilation and natural ventilation. Mechanical ventilation is mainly composed of axial flow fans, ventilation ducts, and air distributors. Natural ventilation mainly utilizes the ship's own openings (doors, windows, hatches, ventilation scoops) and natural ventilation ducts.

[0003] As the main outdoor vent of the ship's ventilation system, the mushroom-shaped ventilator is very commonly used in the ventilation system. When the cabin requires natural ventilation, a conventional mushroom-shaped ventilator is used. During the ship's voyage, the external airflow passes through the vent interface of the ventilator, forming an air flow difference to achieve convection replacement of indoor air.

[0004] The patent with authorization announcement number CN205311886U discloses a ventilator for ships, which has a cylinder with an opening at the top, the top of the cylinder is covered with a hood, a pressure cover is arranged in the middle position of the top of the hood, a screw is passed through the pressure cover, a hand wheel is installed at the top of the screw, and a sealing cover plate is sleeved near the bottom of the screw; the hand wheel drives the screw to rotate and drives the sealing cover plate to cover the top opening of the cylinder or open the top opening of the cylinder; a galvanized silencer hole plate is arranged on the inner side of the hood, and sound insulation cotton is filled between the hood and the galvanized silencer hole plate.

[0005] The above-mentioned ventilators rely on the power of the ship to form an airflow difference when replacing air, and the replacement effect is general. When a fan fails or a power outage occurs when loading dangerous goods, resulting in a loss of power, the above-mentioned ventilators cannot effectively replace the indoor air, causing the dilution rate of the indoor dangerous gas to increase sharply, resulting in an impact on the safety of the crew in a short period of time. Summary of the invention

[0006] The purpose of the present invention is to provide a non-powered wind tube for ships to solve the problem that the wind tube in the prior art has poor air replacement effect.

[0007] In order to achieve the above-mentioned object, the present invention provides a non-powered wind tube for a ship, comprising a wind tube body, a wind cap, a weathertight cover and a driving assembly, wherein the wind tube body is used to be assembled on a hull, the wind cap is sleeved on the top of the wind tube body, the wind cap has a vent, the weathertight cover is located between the wind cap and the wind tube body, the driving assembly is drivingly connected with the weathertight cover to drive the weathertight cover to vertically rise and fall, and the weathertight cover has an open state in which the wind tube body is connected with the vent and a closed state in which the wind tube body is sealed during the lifting stroke;

[0008] It also includes a Bernoulli tube, a bracket is provided on the side of the wind and raintight cover facing the wind duct body, the Bernoulli tube is fixedly connected to the bracket, the vertical projection of the Bernoulli tube is located in the wind duct body, the Bernoulli tube has an inlet end close to the vent and an outlet end away from the vent, and the inner diameter of the inlet end is larger than the inner diameter of the outlet end.

[0009] Preferably, the outlet end is located on the central axis of the wind cylinder body.

[0010] Preferably, the Bernoulli tube is a conical tube, and the taper range of the conical tube is 1 / 10-1 / 20.

[0011] Preferably, the central axis of the Bernoulli tube is perpendicular to the central axis of the wind cylinder body.

[0012] Preferably, the bracket comprises a plurality of vertically arranged fixing rods, the top ends of the fixing rods are fixedly connected to the weathertight cover, and the Bernoulli tube is fixed between the fixing rods.

[0013] Preferably, the hood is a cylindrical structure, and a shutter is provided on the circumferential surface of the hood, and the shutter forms the vent.

[0014] Preferably, a protective net is also provided on the outer side of the shutter.

[0015] Preferably, the drive assembly includes a screw and a handwheel assembled on the top of the screw, the screw is coaxially arranged with the air duct body, the wind and rainproof cover is threadedly assembled with the screw, a support plate is provided inside the air duct body, the bottom end of the screw is rotatably assembled with the support plate, a vertically extending guide plate is also provided inside the wind hood, and the wind and rainproof cover is assembled with the guide plate in a vertically guided manner.

[0016] Compared with the prior art, the non-powered wind duct for ships in the embodiment of the present invention has the following beneficial effects: a bracket is provided on the side of the wind duct body facing the wind duct body of the wind tight cover to fix and assemble the Bernoulli tube. When the gas flows from the vent of the wind hood into the wind hood, the gas flows from the inlet end of the Bernoulli tube to the outlet end. Since the inner diameter of the inlet end of the Bernoulli tube is larger than the inner diameter of the outlet end, according to the Bernoulli gas effect, the cross-section of the airflow in the Bernoulli tube becomes narrower and narrower, and the wind speed becomes higher and higher. Therefore, the airflow forms a high-speed airflow when it is discharged through the outlet end. Similarly, according to the Bernoulli gas effect, a negative pressure area is formed around the high-speed airflow. Since the vertical projection of the Bernoulli tube is located in the wind duct body, the negative pressure area will drive the airflow in the wind duct body to flow into the wind hood and be discharged through the vent on the other side of the wind hood. The gas flow in the cabin can be accelerated without a fan driving the gas, and the indoor airflow can forcefully replace the air, thereby optimizing the natural ventilation effect of the cabin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the unpowered wind tube for ships of the present invention;

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure of the weathertight cover of the non-powered wind tube for ships when it is in a closed state;

[0019] Figure 3 yes Figure 1 The cross-sectional view of the ship's unpowered wind tube along the AA line;

[0020] Figure 4 yes Figure 1 A cross-sectional view of a ship's unpowered wind tube along line BB;

[0021] Figure 5 yes Figure 4 Schematic diagram of gas flow in a non-powered wind tunnel for ships.

[0022] In the figure, 1, air duct body, 2, hood, 21, vent, 3, weathertight cover, 4, drive assembly, 41, screw, 42, handwheel, 43, support plate, 44, guide plate, 5, Bernoulli tube, 51, inlet end, 52, outlet end, 6, indicator rod, 7, bracket, 71, fixing rod, 8, shutter, 9, protective net. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] A preferred embodiment of a non-powered wind tube for a ship of the present invention is as follows: Figures 1 to 5 As shown, the unpowered wind duct for ships includes a wind duct body 1, a wind hood 2, a wind and rainproof cover 3, a drive assembly 4 and a Bernoulli tube 5. The wind duct body 1 is used to be fixedly assembled on the hull. In this embodiment, the wind duct body 1 is a cylindrical hollow structure. After being assembled on the hull, the wind duct body 1 is connected to the cabin on the hull for replacing air in the cabin.

[0025] The hood 2 is mounted on the top of the wind tube body 1. The hood 2 has a vent 21. The vent 21 is arranged on the outside of the hood 2. The hood 2 is used to prevent foreign matter from entering the wind tube body 1, while ensuring the flow of air. In this embodiment, the hood 2 is a cylindrical structure coaxially arranged with the wind tube body 1. The vent 21 is located on the outer circumferential surface of the hood 2. When the ship is sailing, the airflow in the wind tube body 1 flows horizontally outward through the vent 21.

[0026] The wind and rain-tight cover 3 is located between the hood 2 and the wind cylinder body 1. The wind and rain-tight cover 3 is coaxially arranged with the wind cylinder body 1. The wind and rain-tight cover 3 is used to seal the wind cylinder body 1 under abnormal circumstances to prevent external wind and rain from entering the cabin through the wind cylinder body 1. The driving component 4 is connected to the wind and rain-tight cover 3 in a transmission manner to drive the wind and rain-tight cover 3 to rise and fall vertically. The driving component 4 is used to adjust the position of the wind and rain-tight cover 3 to realize the switching of the ventilation and sealing states of the wind cylinder body 1.

[0027] During the lifting stroke driven by the driving assembly 4, when the wind and rain-tight cover 3 moves downward to be close to the wind duct body 1, the wind and rain-tight cover 3 seals the wind duct body 1. At this time, the wind and rain-tight cover 3 is in a closed state, which can prevent external wind and rain from entering the wind duct body 1. When the wind and rain-tight cover 3 moves upward, the wind duct body 1 is opened and communicated with the vent 21. At this time, the wind duct body 1 can replace the airflow through the vent 21.

[0028] In this embodiment, an indicator rod 6 is also fixedly connected to the weathertight cover 3, and the indicator rod 6 extends in the vertical direction, and the top end of the indicator rod 6 passes through the hood 2 and is located outside the hood 2. When the driving assembly 4 drives the weathertight cover 3 to rise and fall vertically, the indicator rod 6 rises and falls synchronously, and the operator can judge the position of the weathertight cover 3 by the relative position of the indicator rod 6 and the hood 2.

[0029] A bracket 7 is provided on the side of the wind-tight cover 3 facing the wind-cylinder body 1, and the Bernoulli tube 5 is fixedly connected to the bracket 7. The Bernoulli tube 5 is located on the side of the wind-tight cover 3 facing the wind-cylinder body 1. The vertical projection of the Bernoulli tube 5 is located in the wind-cylinder body 1, that is, the Bernoulli tube 5 is located within the vertical area of ​​the wind-cylinder body 1. When the wind-tight cover 3 is raised or lowered, the Bernoulli tube 5 can be raised or lowered synchronously to move into the wind-cylinder body 1, so as to avoid interference between the Bernoulli tube 5 and the wind-cylinder.

[0030] The Bernoulli tube 5 has an inlet end 51 and an outlet end 52, wherein the inlet end 51 is arranged toward the vent 21, and the outlet end 52 is arranged away from the vent 21, wherein the outlet end 52 away from the vent 21 means relative to the vent 21 at the inlet end 51. The inner diameter of the inlet end 51 is larger than the inner diameter of the outlet end 52, so that the inner diameter of the Bernoulli tube 5 gradually decreases from the inlet end 51 to the outlet end 52. When the Bernoulli tube 5 is assembled, the inlet end 51 is arranged toward the bow of the ship, so that the gas enters the inlet end 51 of the Bernoulli tube 5 through the vent 21.

[0031] According to the Bernoulli gas effect, when the gas flows, the smaller the path area, the faster the speed, and the faster the speed, the smaller the pressure. Therefore, when the airflow flows from the inlet end 51 to the outlet end 52 of the Bernoulli tube 5, the speed becomes faster and faster, and a high-speed airflow is ejected at the outlet end 52. The high-speed airflow forms a negative pressure area around it. The negative pressure area drives the air in the wind tube body 1 to flow with the high-speed airflow and is discharged through the vent 21, thereby replacing the air in the cabin without power.

[0032] The ship's unpowered wind duct is provided with a bracket 7 on the side of the wind duct body 1 facing the wind duct body 1 of the windproof cover 3 to fix the Bernoulli tube 5. When the gas flows from the vent 21 of the wind hood 2 into the wind hood 2, the gas will flow from the inlet end 51 of the Bernoulli tube 5 to the outlet end 52. Since the inner diameter of the inlet end 51 of the Bernoulli tube 5 is larger than the inner diameter of the outlet end 52, according to the Bernoulli gas effect, the flow cross-section of the airflow in the Bernoulli tube 5 becomes narrower and narrower, and the wind speed becomes higher and higher. Therefore, the airflow forms a high-speed airflow when it is discharged through the outlet end 52. Similarly, according to the Bernoulli gas effect, a negative pressure area is formed around the high-speed airflow. Since the vertical projection of the Bernoulli tube 5 is located in the wind duct body 1, the negative pressure area will drive the airflow in the wind duct body 1 to flow into the wind hood 2 and be discharged through the vent 21 on the other side of the wind hood 2. In the absence of a fan to drive the gas, the gas flow in the cabin can be accelerated, the indoor airflow is forced to replace the air, and the natural ventilation effect of the cabin is optimized.

[0033] Preferably, the outlet end 52 is located on the central axis of the wind cylinder body 1 .

[0034] The outlet end 52 is located on the central axis of the wind cylinder body 1, that is, the outlet end 52 is located in the middle position of the wind cylinder body 1, and the Bernoulli tube 5 occupies half of the area of ​​the wind cylinder body 1. In this case, the high-speed airflow ejected from the outlet end 52 can effectively attract the airflow in the wind cylinder body 1, thereby improving the gas replacement effect in the cabin.

[0035] Preferably, the Bernoulli tube 5 is a conical tube, and the taper range of the conical tube is 1 / 10-1 / 20.

[0036] The conical tube is a commonly used reducer in ships, and its processing technology is mature and the cost is low. When the conical tube has a taper range of 1 / 10-1 / 20, the gas has a good acceleration effect during the flow from the inlet end 51 to the outlet end 52.

[0037] Preferably, the central axis of the Bernoulli tube 5 is perpendicular to the central axis of the wind cylinder body 1 .

[0038] The central axis of the Bernoulli tube 5 is perpendicular to the central axis of the wind cylinder body 1, that is, the Bernoulli tube 5 is arranged vertically to the wind cylinder body 1. At this time, the Bernoulli tube 5 is flush with the vent 21 on the hood 2 body, which can accelerate the flow of gas into the Bernoulli tube 5. In addition, the airflow discharged through the outlet end 52 of the Bernoulli tube 5 flows horizontally, which can well attract the airflow in the wind cylinder body 1.

[0039] Preferably, the bracket 7 includes a plurality of vertically arranged fixing rods 71 ​​, the top ends of the fixing rods 71 ​​are fixedly connected to the weathertight cover 3 , and the Bernoulli tube 5 is fixed between the fixing rods 71 ​​.

[0040] The bracket 7 is formed by a plurality of vertical fixing rods 71, which simplifies the structure of the bracket 7. The vertical projection of the fixing rod 71 is located in the wind tube body 1, and the fixing rod 71 can be raised and lowered simultaneously with the weathertight cover 3 to avoid interference between the fixing rod 71 and the wind tube body 1. In this embodiment, the fixing rod 71 is an angle steel, and the fixing rod 71 is fixed to the Bernoulli tube 5 by welding.

[0041] Preferably, the hood 2 is a cylindrical structure, and a shutter 8 is provided on the circumferential surface of the hood 2 , and the shutter 8 forms a ventilation opening 21 .

[0042] The shutters 8 form a vent 21 , and the shutters 8 can effectively prevent larger foreign objects from entering the hood 2 while ensuring the flow of air.

[0043] Preferably, a protective net 9 is further provided on the outer side of the shutter 8 .

[0044] The opening of the shutter 8 is usually large and can only prevent large foreign objects. A protective net 9 is arranged on the outside of the shutter 8. The protective net 9 can prevent small foreign objects from entering the hood 2, and cooperate with the shutter 8 to improve the protection effect. In this embodiment, the area between the bottom of the hood 2 and the wind tube body 1 is an open structure, and the protective net 9 is arranged at the open structure.

[0045] Preferably, the driving assembly 4 includes a screw 41 and a handwheel 42 assembled on the top of the screw 41, the screw 41 is coaxially arranged with the wind cylinder body 1, the wind and raintight cover 3 is threadedly assembled with the screw 41, a support plate 43 is provided inside the wind cylinder body 1, the bottom end of the screw 41 is rotatably assembled with the support plate 43, a vertically extending guide plate 44 is also provided inside the wind hood 2, and the wind and raintight cover 3 and the guide plate 44 are guided and assembled along the vertical direction.

[0046] The handwheel 42, the screw 41 and the guide plate 44 form a driving assembly 4. The operator can drive the screw 41 to rotate by grabbing the handwheel 42. Since the weathertight cover 3 and the screw 41 are threadedly assembled, and the weathertight cover 3 and the guide plate 44 are guided and assembled in the vertical direction, under the action of the thread, the weathertight cover 3 does not rotate but moves in the vertical direction. The position of the weathertight cover 3 is adjusted to realize the switching of the open and closed states of the wind duct body 1.

[0047] In summary, an embodiment of the present invention provides a non-powered wind duct for ships, which has a bracket for fixing and assembling a Bernoulli tube on the side of the windproof cover facing the wind duct body. When the gas flows from the vent of the wind hood into the wind hood, the gas will flow from the inlet end of the Bernoulli tube to the outlet end. Since the inner diameter of the inlet end of the Bernoulli tube is larger than the inner diameter of the outlet end, according to the Bernoulli gas effect, the cross-section of the airflow in the Bernoulli tube becomes narrower and narrower, and the wind speed becomes higher and higher. Therefore, the airflow forms a high-speed airflow when it is discharged through the outlet end. Similarly, according to the Bernoulli gas effect, a negative pressure area is formed around the high-speed airflow. Since the vertical projection of the Bernoulli tube is located in the wind duct body, the negative pressure area will drive the airflow in the wind duct body to flow into the wind hood and be discharged through the vent on the other side of the wind hood. The gas flow in the cabin can be accelerated without a fan driving the gas, thereby realizing forced replacement of air by the indoor airflow and optimizing the natural ventilation effect of the cabin.

[0048] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A non-powered wind tube for a ship, characterized in that: The wind tube body (1) comprises a wind cap (2), a weathertight cover (3) and a driving assembly (4); the wind tube body (1) is used for being assembled on a ship; the wind cap (2) is mounted on the top of the wind tube body (1); the wind cap (2) has a vent (21); the weathertight cover (3) is located between the wind cap (2) and the wind tube body (1); the driving assembly (4) is drivingly connected to the weathertight cover (3) to drive the weathertight cover (3) to rise and fall vertically; and the weathertight cover (3) has an open state in which the wind tube body (1) is connected to the vent (21) and a closed state in which the wind tube body (1) is sealed during the lifting stroke; The wind tube (1) further comprises a Bernoulli tube (5); a bracket (7) is provided on the side of the wind and raintight cover (3) facing the wind tube body (1); the Bernoulli tube (5) is fixedly connected to the bracket (7); a vertical projection of the Bernoulli tube (5) is located inside the wind tube body (1); the Bernoulli tube (5) has an inlet end (51) close to the vent (21) and an outlet end (52) away from the vent (21); the inner diameter of the inlet end (51) is greater than the inner diameter of the outlet end (52).

2. The unpowered wind tube for a ship according to claim 1, characterized in that: The outlet end (52) is located on the central axis of the wind cylinder body (1).

3. The unpowered wind tube for a ship according to claim 1, characterized in that: The Bernoulli tube (5) is a conical tube, and the taper range of the conical tube is 1 / 10-1 / 20.

4. The unpowered wind tube for a ship according to claim 1, characterized in that: The central axis of the Bernoulli tube (5) is perpendicular to the central axis of the wind cylinder body (1).

5. The unpowered wind tube for a ship according to any one of claims 1 to 4, characterized in that: The bracket (7) comprises a plurality of vertically arranged fixing rods (71), the top ends of the fixing rods (71) are fixedly connected to the weathertight cover (3), and the Bernoulli tube (5) is fixed between the fixing rods (71).

6. The unpowered wind tube for a ship according to any one of claims 1 to 4, characterized in that: The hood (2) is a cylindrical structure, and a shutter (8) is provided on the circumferential surface of the hood (2), and the shutter (8) forms the ventilation opening (21).

7. The unpowered wind tube for a ship according to claim 6, characterized in that: A protective net (9) is also provided on the outer side of the shutter (8).

8. The unpowered wind tube for a ship according to any one of claims 1 to 4, characterized in that: The driving assembly (4) comprises a screw (41) and a hand wheel (42) mounted on the top of the screw (41); the screw (41) is coaxially arranged with the wind cylinder body (1); the weathertight cover (3) is threadedly assembled with the screw (41); a support plate (43) is provided inside the wind cylinder body (1); the bottom end of the screw (41) is rotatably assembled with the support plate (43); a vertically extending guide plate (44) is also provided inside the wind cap (2); the weathertight cover (3) and the guide plate (44) are guided and assembled along the vertical direction.

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