Airflow enhancing structure and ventilation device

Abstract

The utility model provides an airflow enhancing structure and a ventilation device, the airflow enhancing structure comprises an air guide cavity of a hollow structure and a drainage shell, and a gap is formed between the drainage shell and the air guide cavity; an air inlet is formed in the side wall of the drainage shell and used for introducing initial airflow. The air guide cavity is provided with an air inlet end and an air outlet end in the airflow circulation direction, and the inner wall, located at the air inlet end, of the air guide cavity is provided with a chamfer to change the airflow direction. When the air flow flows out along the gap, the air flow deviates from the original flowing direction due to the wall attachment effect, so that the air which is originally blown out through the gap is blown out of the cavity from the air outlet end along the chamfer, and the change of the air flowing vector direction is realized. Meanwhile, the pressure intensity of the inner side of the ring wall is reduced, a large amount of extra air is sucked in from the inlet direction of the air guide ring, and therefore the effect of amplifying the compressed air amount is achieved. The ventilation device is particularly suitable for the situation that the site construction structure is complex, and good ventilation and construction safety of the ship building environment are improved.

Description

Technical Field

[0001] The present application belongs to the technical field of shipbuilding, and in particular relates to an airflow enhancement structure and a ventilation device. Background Art

[0002] During the shipbuilding process, on-site ventilation has always been the focus of safety control in shipbuilding. The shipbuilding process is complex, the construction environment is harsh, and the risk is high. Employees may suffer from major accidents such as poisoning, suffocation, hypoxia, combustion and explosion during the construction process. Long-term exposure to harmful substances may also induce occupational diseases, seriously endangering the lives and health of employees.

[0003] In order to effectively reduce construction risks, ship construction has long been ventilated on site using traditional methods such as explosion-proof fans and dehumidifiers. The main function of these devices is to ventilate, provide fresh air, exhaust exhaust gas, and maintain indoor air circulation. When selecting ventilation devices, it is necessary to consider factors such as the layout of the construction site and the ship's cabin, the size of the space, ventilation requirements, and the noise, energy consumption, and maintenance costs of the device. Traditional equipment is large in size and weight and cannot directly enter the cabin. In addition, small cabins are generally located inside the hull, with tortuous and complex passages. Ventilation pipes are often very long, ranging from tens of meters to nearly 100 meters, which greatly affects the ventilation effect.

[0004] Therefore, it is necessary to provide an improved technical solution for the deficiencies in the above-mentioned prior art to ensure good ventilation effect during the shipbuilding process. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present application is to provide an airflow enhancement structure and a ventilation device to solve the problems of poor on-site ventilation and high ventilation costs in the shipbuilding process existing in the prior art.

[0006] In a first aspect, the present application provides an airflow enhancement structure, comprising a hollow air guide cavity and a drainage shell, wherein the drainage shell is sleeved on the outside of the air guide cavity, and a gap is formed between the drainage shell and the air guide cavity; wherein:

[0007] The side wall of the drainage housing is provided with an air inlet for introducing an initial airflow;

[0008] Along the air flow direction, the air guide cavity has an air inlet end and an air outlet end, and the inner wall of the air guide cavity located at the air inlet end has a cut angle to change the air flow direction.

[0009] In one embodiment, the air guiding cavity located at the air outlet end has an inclined inner wall, and the inner diameter of the air guiding cavity gradually increases along the air flow direction.

[0010] In one embodiment, along the air flow direction, the air inlet end of the air guide cavity is flush with the air guide housing.

[0011] In one embodiment, the width of the gap is 5 mm to 20 mm.

[0012] In one embodiment, the cut corner is an arc-shaped cut corner, and the radius of curvature of the arc-shaped cut corner is 5 mm to 15 mm.

[0013] In one embodiment, the radius of curvature of the arc-shaped cut corner is equal to the wall thickness of the air guide cavity at the air inlet end.

[0014] In one embodiment, a flat flow portion is provided between the air inlet end and the air outlet end, and the flat flow portion is a hollow cavity structure with equal inner diameters.

[0015] In one embodiment, along the air flow direction, the length of the air outlet end is greater than twice the sum of the lengths of the air inlet end and the flat flow portion.

[0016] In one embodiment, the closed end of the gap is located within the coverage area of ​​the air inlet.

[0017] In a second aspect, the present application provides a ventilation device, comprising the airflow enhancement structure described in the above technical solution, wherein the air inlet of the airflow enhancement structure is connected to an air pump; and the air outlet of the airflow enhancement structure is connected to a wind tube.

[0018] Compared with the prior art, the technical solution provided by this application has the following beneficial effects:

[0019] The airflow enhancement structure provided by the present application includes an air guide cavity and a drainage shell of a hollow structure, wherein the drainage shell is sleeved on the outside of the air guide cavity, and a gap is formed between the two for airflow circulation; along the airflow circulation direction, the air guide cavity has an air inlet end and an air outlet end, and the inner wall of the air guide cavity located at the air inlet end has a cut angle to change the airflow direction: when the airflow flows out along the gap between the air guide cavity and the drainage shell, due to the wall attachment effect, the airflow will deviate from the original flow direction and change to flow along the cut angle of the inner wall of the air guide cavity, so that the air originally blown out through the gap is blown out of the cavity from the air outlet end along the cut angle, thereby realizing the change of the air flow vector direction. At the same time, the pressure on the inner side of the ring wall is reduced, so that the surrounding air flows from the high pressure place to the low pressure direction, and the additional air is inhaled in large quantities from the inlet direction of the air guide ring, thereby realizing the amplification effect of the compressed air volume.

[0020] In addition, configuring the airflow enhancement structure with air ducts and air pumps of appropriate specifications can achieve safe multi-directional and long-distance airflow transportation, which is particularly suitable for scenarios with complex on-site construction structures, thereby improving the ventilation and construction safety of the shipbuilding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Shown is a schematic diagram of the appearance structure of the airflow enhancement structure provided by the present application;

[0022] Figure 2 Shows a front view of the airflow enhancement structure provided by the present application;

[0023] Figure 3 Display as Figure 2 Schematic diagram of the cross section along AA;

[0024] Figure 4 Display as Figure 2 A partial enlarged schematic diagram of

[0025] Figure 5 Display as Figure 2 Another partial enlarged schematic diagram of;

[0026] Figure 6 Display as Figure 2 Schematic diagram of the cross section along BB;

[0027] Figure 7 Shown is a schematic diagram of the structure of the ventilation device provided in this application and a schematic diagram of the airflow direction.

[0028] Description of reference numerals:

[0029] 100. Gas guide cavity;

[0030] 110, air inlet end; 120, advection part; 130, air outlet end;

[0031] 200, drainage housing;

[0032] 210, air inlet;

[0033] 300, gap;

[0034] 400. Hair dryer. DETAILED DESCRIPTION

[0035] The shipbuilding site needs a good ventilation environment for the following reasons:

[0036] 1) Ensure safety: During the shipbuilding process, various harmful gases and particles will be generated. If they are not discharged in time, they may cause harm to workers and the surrounding environment. Good ventilation can effectively discharge these harmful gases and particles to protect the construction safety of workers and the surrounding environment;

[0037] 2) Improve work efficiency: Good ventilation can improve the comfort of construction workers, reduce fatigue and improve work efficiency;

[0038] 3) Reduce the risk of combustion and explosion: During the shipbuilding process, there are many flammable and explosive gases. Good ventilation can effectively discharge the flammable and explosive gases and reduce the risk of combustion and explosion;

[0039] 4) Control temperature and humidity: With the circulation of air flow, the temperature and humidity on site can be controlled;

[0040] 5) Reduce noise pollution: Good ventilation can also help reduce construction noise.

[0041] Therefore, at the ship construction site, attention should be paid to the installation and maintenance of ventilation facilities to ensure good ventilation. When selecting ventilation devices, factors such as the layout of the construction site and the ship cabin, the size of the space, ventilation requirements, as well as factors such as the noise, energy consumption, and maintenance costs of the device need to be considered. Traditional equipment is large in size and weight and cannot directly enter the cabin. In addition, small cabins are generally located inside the hull, with tortuous and complex passages. Ventilation pipes are often very long, ranging from tens of meters to nearly 100 meters, which greatly affects the ventilation effect.

[0042] In view of the above problems, the present application designs an airflow enhancement structure and ventilation device. The following describes the implementation of the present application through specific examples. Those skilled in the art can easily understand other advantages and principles of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementations. The details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application.

[0043] It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the present application in a schematic manner. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0044] Embodiment 1:

[0045] See also Figures 1 to 6 , Embodiment 1 of the present application discloses an airflow enhancement structure, comprising an air guide cavity 100 of a hollow structure and a drainage shell 200, wherein the drainage shell 200 is sleeved on the outside of the air guide cavity 100, and the drainage shell 200 can be installed on the outside of the air guide cavity 100 by bolt connection or welding, and a gap 300 is provided between the drainage shell 200 and the air guide cavity 100, and the gap 300 is an annular airflow circulation structure with one end closed and the other end open around the outside of the air guide cavity 100; wherein,

[0046] The side wall of the flow guide housing 200 is provided with an air inlet 210 for introducing an initial air flow;

[0047] Along the air flow direction, the air guiding cavity 100 has an air inlet end 110 and an air outlet end 130 , and the inner wall of the air guiding cavity 100 at the air inlet end 110 has a cut angle to change the air flow direction.

[0048] By adopting the above technical solution, when the airflow flows out along the gap 300 between the air guide cavity 100 and the drainage shell 200, due to the wall effect, the airflow will deviate from the original flow direction and change to the flow tendency along the cut angle of the inner wall of the air guide cavity 100, so that the air originally blown out through the gap 300 enters the cavity along the cut angle from the air inlet end 110 and blows out of the cavity from the air outlet end 130, thereby realizing the change of the air flow vector direction. While ensuring that the compressed air pressure and air intake remain unchanged, the gap 300 of the annular cavity is used to accelerate the blown air, and a large amount of accelerated air is blown out through the wall effect, reducing the pressure of the annular wall. According to Bernoulli's principle, when the fluid flows, the greater the flow rate, the lower the pressure. At this time, the blown airflow will produce a pressure difference with the surrounding air, and the pressure on the inner side of the annular wall is reduced, so that the surrounding air flows from the high pressure place to the low pressure direction, and the additional air is inhaled in large quantities from the air inlet end 110 of the air guide cavity 100, thereby realizing the amplification effect of the compressed air volume, providing sufficient circulating air for the ship construction environment.

[0049] In the above embodiment, the air guide cavity 100 can be an integrally formed structure, and a cavity having a flow guide structure and a slanted inner wall is formed by lathing a hollow cylinder. The outer diameter of the air guide cavity 100 can be 150 mm to 250 mm, and the thinnest thickness of the air guide cavity 100 is 10 mm. The drainage housing 200 can also be an integrally formed structure, and the outer diameter of the drainage housing 200 can be 220 mm to 300 mm. The length of the gap 300 can be 15 mm to 30 mm.

[0050] See also Figure 3 In one embodiment, the air guide cavity 100 located at the air outlet 130 has an inclined inner wall with the same inclination angle, and the inner diameter of the air guide cavity 100 gradually increases along the air flow direction. That is, the inclined inner wall has an angle α with the horizontal direction, 2°≤α≤10°. As an example, the angle α can be 2°, 4°, 6°, 8° or 10°. Further, 3.5°≤α≤5.5°. When the airflow in the air pump and the external airflow enter the air guide cavity 100 from the air inlet end 110, the airflow can be guided through the inclined inner wall to make it blow out more smoothly. The angle α should not be too large to avoid air pressure disturbance caused by large changes in the direction of the airflow. At the same time, the angle α should not be too small, otherwise it will not have sufficient drainage and diversion effects. It can be understood that the longer the length of the air outlet 130, the smaller the angle α. When the wall thickness of the air guide cavity 100 is less than 10 mm, it is not enough to maintain it under excessive pressure. Therefore, when

[0051] See also Figures 3 to 6 In one embodiment, along the air flow direction, the air inlet end 110 of the air guide cavity 100 is flush with the drainage housing 200. When the air flow is blown out from the gap 300, while generating a tendency to escape from the side wall of the drainage housing 200, the wall attachment effect brings about a drainage effect, and the gas that should be blown out along the gap 300 generates an inward reflux phenomenon, and is guided to the inside of the air guide cavity 100 by the cut corner. It can be understood that the air inlet end 110 of the air guide cavity 100 can also be shorter than the drainage housing 200, that is, it is equivalent to the drainage housing 200 covering the air inlet end 110, the purpose of which is to prevent the gas blown out from the gap 300 from being able to flow back into the air guide cavity 100 along the cut corner as much as possible, and avoid the waste of gas source caused by the escape.

[0052] Continue to see Figures 3 to 6 In one embodiment, the width of the gap is 5 mm to 20 mm. If the gap width is less than 5 mm, the air pressure in the gap 300 will be too high. If the gap width is greater than 20 mm, the volume of the drainage housing 200 and the overall footprint of the device will be increased, or the volume of the air guide channel of the air guide cavity 100 will be reduced, all of which will have a negative effect on airflow amplification or weaken the airflow amplification effect. As an example, the gap width can be 5 mm, 8 mm, 10 mm, 12 mm, 15 mm or 20 mm.

[0053] See also Figure 4 In one embodiment, to facilitate the manufacture of the structure, the cut corner is a cut corner structure formed by connecting multiple joint surfaces in sequence. It can be understood that the more joint surfaces of the cut corner, the more similar the cut corner structure is to the arc structure. In order to achieve a good drainage effect, at least three joint surfaces should be provided to form a good transition, so as to produce an obvious wall attachment effect and change the airflow direction.

[0054] See also Figure 5 In one embodiment, the cut corner is an arc cut corner, and the curvature radius of the arc cut corner is 5 mm to 15 mm. As an example, the curvature radius of the arc cut corner can be 5 mm, 8 mm, 10 mm, 12 mm or 15 mm.

[0055] Continue to see Figure 5 In one embodiment, the radius of curvature of the arc-shaped cut corner is equal to the wall thickness of the air guide cavity of the air inlet end 110 , so as to achieve a good transition between the cut corner flow guide structure and the air inlet end 100 .

[0056] See also Figure 3 and Figure 6In one embodiment, a flat flow portion 120 is provided between the air inlet end 110 and the air outlet end 130, and the flat flow portion 120 is a hollow cavity structure with equal inner diameter. The flat flow portion stabilizes the airflow, preventing the turbulence caused by sudden changes in air pressure from causing irregular vibration of the device, thereby causing production hazards.

[0057] In one embodiment, along the air flow direction, the length of the air outlet 130 is greater than twice the sum of the lengths of the air inlet 110 and the flat flow portion 120. The length of the air outlet 130 should be extended as much as possible to stabilize the air flow. As an example, the length of the flat flow portion 120 can be 15 mm to 30 mm. For example, 15 mm, 20 mm, 25 mm or 30 mm. The length of the air outlet 130 can be between 100 mm and 200 mm. For example, 100 mm, 120 mm, 150 mm, 180 mm or 200 mm.

[0058] See also Figure 6 In one embodiment, the closed end of the gap 300 is located within the coverage of the air inlet. That is, after the gas is pressurized by the air pump and enters the gap 300, there is only one flow direction, which prevents the gas from flowing back or accumulating at the bottom of the gap 300 to cause gas source waste.

[0059] Embodiment 2:

[0060] See also Figure 7 , Embodiment 2 of the present application discloses a ventilation device, including the airflow enhancement structure provided in Embodiment 1, the air inlet of the airflow enhancement structure is connected to the air pump, and the joint can be a joint structure of a six-branch air bag belt; the air outlet of the airflow enhancement structure is connected to the wind tube 400. The wind tube 400 can be a flexible wind tube made of canvas, artificial leather, plastic, rubber, etc., or a metal wind tube made of iron sheet or aluminum plate. The length of the wind tube 400 can be as short as a few meters or as long as hundreds of meters. The shape of the wind tube 400 can be bent into a suitable shape according to the ship construction site or the material stacking position. The wind tube 400 can also be set as a ventilation structure with multiple branches according to needs, which can realize the safe transportation of airflow in multiple directions and over long distances, and is particularly suitable for scenes with complex on-site construction structures, thereby improving the good ventilation and construction safety of the ship construction environment.

[0061] In summary, the present application provides an airflow enhancement structure and a ventilation device, the airflow enhancement structure includes an air guide cavity and a drainage shell of a hollow structure, the drainage shell is sleeved on the outside of the air guide cavity, and a gap is formed between the two for airflow circulation; along the airflow circulation direction, the air guide cavity has an air inlet end and an air outlet end, and the inner wall of the air guide cavity located at the air inlet end has a cut angle to change the airflow direction: when the airflow flows out along the gap between the air guide cavity and the drainage shell, due to the wall attachment effect, the airflow will deviate from the original flow direction and change to a flow tendency along the cut angle of the inner wall of the air guide cavity, so that the air originally blown out through the gap is blown out of the cavity from the air outlet end along the cut angle, realizing the change of the air flow vector direction. At the same time, the pressure on the inner side of the ring wall is reduced, so that the surrounding air flows from the high pressure place to the low pressure direction, and the additional air is inhaled in large quantities from the inlet direction of the air guide ring, thereby realizing the amplification effect of the compressed air volume. The ventilation device configures the airflow enhancement structure with a wind tube and an air pump of suitable specifications, which can realize the safe multi-directional and long-distance delivery of airflow, and is particularly suitable for scenes with complex on-site construction structures, thereby improving the good ventilation and construction safety of the shipbuilding environment. Therefore, the present application effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0062] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. An airflow enhancement structure, characterized in that: It comprises a hollow air guide cavity and a drainage shell, wherein the drainage shell is sleeved on the outside of the air guide cavity, and there is a gap between the drainage shell and the air guide cavity; wherein, The side wall of the drainage housing is provided with an air inlet for introducing an initial airflow; Along the air flow direction, the air guide cavity has an air inlet end and an air outlet end, and the inner wall of the air guide cavity located at the air inlet end has a cut angle to change the air flow direction.

2. The airflow enhancement structure according to claim 1, characterized in that: The air guide cavity located at the air outlet end has an inclined inner wall, and the inner diameter of the air guide cavity gradually increases along the air flow direction.

3. The airflow enhancement structure according to claim 1, characterized in that: Along the air flow direction, the air inlet end of the air guide cavity is flush with the flow guide housing.

4. The airflow enhancement structure according to claim 1, characterized in that: The width of the gap is 5 mm to 20 mm.

5. The airflow enhancement structure according to claim 1, characterized in that: The cut corner is an arc cut corner, and the curvature radius of the arc cut corner is 5mm to 15mm.

6. The airflow enhancement structure according to claim 5, characterized in that: The radius of curvature of the arc-shaped cut corner is equal to the wall thickness of the air guide cavity at the air inlet end.

7. The airflow enhancement structure according to claim 1, characterized in that: A flat flow portion is provided between the air inlet end and the air outlet end, and the flat flow portion is a hollow cavity structure with equal inner diameters.

8. The airflow enhancement structure according to claim 7, characterized in that: Along the air flow direction, the length of the air outlet end is greater than twice the sum of the lengths of the air inlet end and the flat flow portion.

9. The airflow enhancement structure according to claim 1, characterized in that: The closed end of the gap is located within the coverage area of ​​the air inlet.

10. A ventilation device, characterized in that: It comprises the airflow enhancement structure according to any one of claims 1 to 9, wherein the air inlet of the airflow enhancement structure is connected to an air pump; and the air outlet of the airflow enhancement structure is connected to a wind tube.

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