Marine deck fan

Abstract

An outer barrel comprises an outer cylindrical barrel body and an outer inverted frustum barrel body which are connected up and down, a circle of reinforcing ribs are coaxially arranged in the outer barrel around the circumference to be connected with an inner barrel with a flow guide cavity formed in a spaced mode, and the inner barrel comprises an inner cylindrical barrel body and an inner inverted frustum barrel body which are connected up and down. A motor is installed on the lower bottom of the inner inverted frustum barrel in a supporting and locking mode, an output shaft of the motor is directly connected with an impeller located in the outer inverted frustum barrel, an inner opening and an outer opening are correspondingly formed in the same sides of the inner barrel and the outer barrel, the inner opening extends to the lower bottom of the inner inverted frustum barrel from the upper end of the inner cylindrical barrel, and the outer opening corresponds to the inner opening. And a flow guide cavity between the inner opening and the outer opening is sealed by sealing plates on the two sides of the outer opening. The device is simple in structure, effectively considers cost and maintenance, and can be applied to different flow pressures.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fan, specifically to a deck fan for ship. BACKGROUND

[0002] The deck explosion-proof fan for ship produced at home and abroad is generally divided into I, III, IV and V, wherein IV and V are of the type with air outlet on top, and the type V is widely used due to convenient installation and maintenance and reliable operation. The type V deck explosion-proof fan at home and abroad also has two structural types.

[0003] One type of structure is to use a transmission set, i.e. the motor and the impeller are separated, and the D-type installation. The explosion-proof fan mainly comprises a fan shell, an explosion-proof motor, a motor base, a motor base plate, a cone, a transmission set, an impeller, a vibration sensor, a coupling, a temperature sensor, an explosion-proof junction box and an electric control box, and the transmission set further comprises a main shaft, a bearing box, a rolling bearing and a coupling. According to the shipping standard, the deck explosion-proof fan must be installed outdoors, and the dangerous gas does not pass through the airflow, so the motor must be placed outside the airflow passage. Under this standard, the transmission set is necessary, which separates the motor from the airflow, and the power is transmitted through the coupling to simplify the structure of the fan. However, the explosion-proof fan has the disadvantages of complex structure, high cost and complex maintenance.

[0004] Another type of structure is a simple type, mainly comprising a shell, an explosion-proof motor, an impeller and a protective net. The fan cancels the transmission set, the coupling and the monitoring device, and the impeller is directly assembled on the motor shaft, and the motor directly drives the impeller to rotate to ventilate. The disadvantages of the fan are as follows: an airflow passage needs to be formed inside the fan, and the motor shaft needs to be lengthened to reduce the flow loss, and the length of the motor shaft is generally more than 15 cm. At the same time, the fan rotates at high speed, and the centrifugal force of the impeller exists, so the strength, rigidity and service life of the motor shaft must be considered. Therefore, the motor shaft not only needs to be lengthened but also must be thickened, and the internal bearing of the motor must also be increased, and the internal structure of the motor also needs to be improved and strengthened, which leads to the necessity of customizing the explosion-proof motor, high cost, long cycle, inconvenient maintenance and replacement. In addition, due to the lengthening of the motor shaft, the rotation speed and the centrifugal force of the impeller are limited, the conical guide part is small and short, the passage is short and the space is small, the wind speed is high, the airflow interference is caused, the flow resistance is large, the internal loss is large, the fan efficiency is low, the power of the motor is large, and the motor is often used for small tasks. In addition, due to the lengthening of the motor shaft, the slight imbalance of the impeller during use causes the vibration of the fan, generates abnormal noise, causes the collision between the impeller and the cylinder for a long time, causes the overload of the motor, and damages the motor. In summary, the explosion-proof fan with the above structure is only suitable for small flow and small pressure places, and has poor safety and reliability. SUMMARY

[0005] The utility model provides a kind of marine deck fan with simple structure, effectively taking into account cost, maintenance and applicable to different flow pressure use.

[0006] The utility model discloses a kind of marine deck fan, including outer cylinder, motor and impeller, outer cylinder includes upper and lower integrated outer cylindrical cylinder and outer inverted cone platform cylinder body, it is characterized in that: the inner cylinder of multiple reinforcing bars connection interval is separated from the outer cylinder in the same axis around circumference, inner cylinder includes upper and lower integrated inner cylindrical cylinder and inner inverted cone platform cylinder body, motor support locking is installed on the lower bottom of inner inverted cone platform cylinder body, the impeller of motor's output shaft is directly connected in outer inverted cone platform cylinder body, the inner mouth and outer mouth are set in the same side of the inner cylinder and outer cylinder, inner mouth extends from the upper end of inner cylindrical cylinder to the lower bottom of inner inverted cone platform cylinder body, outer mouth corresponds inner mouth, and the flow guide cavity between inner mouth and outer mouth is sealed by opening, outer opening two sides sealing plate encapsulation.

[0007] The opening direction of the inner mouth and the outer mouth corresponds the wiring direction of the motor.

[0008] The upper end of the flow guide cavity is provided with a protective net.

[0009] The motor is an explosion-proof fan.

[0010] The inner inverted cone platform cylinder body and the outer inverted cone platform cylinder body are coaxial and have the same taper angle.

[0011] The upper bottom of the inner inverted cone platform cylinder body and the outer inverted cone platform cylinder body is on the same horizontal line, and the lower bottom of the inner inverted cone platform cylinder body is higher than the lower bottom of the outer inverted cone platform cylinder body.

[0012] The utility model has the advantages that:

[0013] 1, the flow guide cavity between the outer cylinder and the inner cylinder is used as airflow guide part, which is composed of the cavities between the corresponding inner and outer inverted cone platform cylinder bodies and the corresponding inner and outer cylindrical cylinder bodies, the overall gas outlet length of the flow guide cavity is lengthened, the actual outlet area of airflow is increased, the wind speed is reduced, and the flow resistance is lowered.

[0014] 2, the motor is directly installed on the lower bottom in the inner inverted cone platform cylinder body, the reinforcing bars are added between the outer cylinder and the inner cylinder to strengthen the rigidity of the fan, and at the same time, the overall height of the fan is reduced, the cost is lowered; and the motor can be directly connected to the impeller, without the need for lengthening the output shaft, which is beneficial to the stability and balance of high-speed transmission.

[0015] 3. Because the motor is directly installed in the inner inverted cone cylinder, a pair of openings are formed by corresponding openings of the inner and outer cylinders and are sealed by the sealing plates, so that the motor is convenient to assemble and disassemble.

[0016] The explosion-proof fan with the structure is suitable for small-flow and small-pressure explosion-proof places and large-flow and large-pressure explosion-proof places. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the utility model;

[0018] Figure 2 It is a top view of Figure 1 ;

[0019] Figure 3 It is an A-A view of Figure 1 .

[0020] In the figure: outer cylindrical cylinder 1, outer inverted cone cylinder 2, reinforcing rib 3, flow guide cavity 4, inner cylindrical cylinder 5, inner inverted cone cylinder 6, motor 7, impeller 8, inner opening 9, outer opening 10, sealing plate 11, protective net 12. DETAILED DESCRIPTION

[0021] Further description is made below in combination with the drawings.

[0022] Figure 1 , 2 , 3: a marine deck fan, comprising an outer cylindrical cylinder 1, an outer inverted cone cylinder 2, a reinforcing rib 3, a flow guide cavity 4, an inner cylindrical cylinder 5, an inner inverted cone cylinder 6, a motor 7, an impeller 8, a sealing plate 11 and a protective net 12. The outer cylindrical cylinder 1 and the outer inverted cone cylinder 2 are connected together into an outer cylinder structure of the fan, the inner cylindrical cylinder 5 and the inner inverted cone cylinder 6 are connected together into an inner cylinder structure of the fan, the inner cylinder structure is coaxially arranged in the outer cylinder structure and is connected and spaced by the reinforcing rib to form the flow guide cavity 4, the motor 7 is supported and locked and installed on the lower bottom of the inner inverted cone cylinder 6, the shaft of the motor 7 is directly connected to the impeller 8 located in the outer inverted cone cylinder 2, the inner opening 9 and the outer opening 10 are formed in the inner cylinder structure and the outer cylinder structure on the same side, the inner opening extends from the upper end of the inner cylindrical cylinder to the lower bottom of the inner inverted cone cylinder, the outer opening corresponds to the inner opening, the flow guide cavity between the inner opening and the outer opening is sealed by the sealing plates 11 on both sides of the openings, and the opening directions of the inner opening and the outer opening correspond to the wiring direction of the motor.

[0023] In the embodiment, the upper end of the flow guide cavity 4 is provided with the protective net 12.

[0024] In the embodiment, the motor is an explosion-proof fan.

[0025] In the embodiment, the inner inverted cone cylinder and the outer inverted cone cylinder are coaxial and have the same cone angle, the upper bottom of the inner inverted cone cylinder and the outer inverted cone cylinder are on the same horizontal line, and the lower bottom of the inner inverted cone cylinder is higher than the lower bottom of the outer inverted cone cylinder.

Claims

1. A marine deck fan comprising an outer cylinder, a motor and an impeller, the outer cylinder comprising an upper and lower connected outer cylindrical cylinder body and an outer inverted conical cylinder body, characterized in that: The outer cylinder is connected with the inner cylinder by a plurality of reinforcing ribs which are coaxially arranged around the circumference of the outer cylinder and which connect the inner cylinder with the outer cylinder, the inner cylinder comprises an inner cylindrical cylinder body and an inner inverted conical cylinder body which are connected together, a motor is supported and locked on the lower bottom of the inner inverted conical cylinder body, and an output shaft of the motor is directly connected with an impeller which is located in the outer inverted conical cylinder body, the inner cylinder and the outer cylinder are provided with an inner opening and an outer opening which are respectively formed on the same side of the inner cylinder and the outer cylinder, the inner opening extends from the upper end of the inner cylindrical cylinder body to the lower bottom of the inner inverted conical cylinder body, the outer opening corresponds to the inner opening, and the flow guide cavity between the inner opening and the outer opening is encapsulated by two side sealing plates.

2. A marine deck fan as claimed in claim 1, characterised in that: The opening directions of the inner opening and the outer opening correspond to the wiring direction of the motor.

3. A marine deck fan as claimed in claim 1, characterised in that: A protective net is arranged at the upper end of the flow guide cavity.

4. A marine deck fan as claimed in claim 1, characterised in that: The motor is an explosion-proof fan.

5. A marine deck fan as claimed in claim 1, characterised in that: The inner inverted conical cylinder body and the outer inverted conical cylinder body are coaxial and have the same conical angle.

6. A marine deck fan as claimed in claim 1 or 5, characterised in that: The upper bottoms of the inner inverted conical cylinder body and the outer inverted conical cylinder body are located on the same horizontal line, and the lower bottom of the inner inverted conical cylinder body is higher than the lower bottom of the outer inverted conical cylinder body.

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