A new type of marine large-flow low-noise axial flow fan

Abstract

The utility model relates to the technical field of ventilation, in particular to a novel marine high-flow low-noise axial flow ventilator, which filters solid impurities in the air entering the exhaust pipe by the filtering mechanism when exhausting, reduces dust and impurities attached to the motor and impeller, ensures normal use of the motor and impeller, ensures overall service life of the fan, is convenient to use, and is high in reliability and practicality; including exhaust pipe, mounting bracket, fixed frame, motor and impeller, the mounting bracket is fixedly installed on the exhaust pipe, the chamber that is communicated up and down is set up in the exhaust pipe, the fixed frame is fixedly installed in the chamber of exhaust pipe, the motor is fixedly installed on the fixed frame, and the output end of motor is provided with the shaft.

Description

Technical Field

[0001] This utility model relates to the technical field of ventilation, and in particular to a novel marine high-flow-rate, low-noise axial flow fan. Background Technology

[0002] In the construction of large ships, welding operations are typically carried out in large, independent spaces. During welding, these areas generate a large amount of welding fumes, necessitating forced exhaust by fans to prevent excessively high fume concentrations. Existing fans, such as the axial flow fan disclosed in patent application number 201610874772.7, mainly consist of a casing and impeller. In operation, a motor rotates the impeller, drawing gas into the casing through the inlet and expelling it through the exhaust pipe. However, this design suffers from several problems. During operation, outside air directly enters the casing and comes into contact with the impeller. Dust and other impurities in the air easily adhere to the impeller and motor, affecting impeller rotation and motor heat dissipation, thus impacting the overall lifespan of the fan. This also makes it inconvenient to use. Therefore, a fan that reduces dust entering the casing is needed. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a new type of marine high-flow-rate low-noise axial flow fan that, during exhaust, first filters out solid impurities from the air entering the exhaust pipe by a filtration mechanism, reducing dust and impurities adhering to the motor and impeller, ensuring the normal operation of the motor and impeller, guaranteeing the overall service life of the fan, and offering convenient use, high reliability and practicality.

[0004] This utility model discloses a novel marine high-flow-rate, low-noise axial flow fan, comprising an exhaust pipe, a mounting bracket, a fixing bracket, a motor, and an impeller. The mounting bracket is fixedly mounted on the exhaust pipe, which contains a vertically connected chamber. The fixing bracket is fixedly mounted within the chamber of the exhaust pipe, and the motor is fixedly mounted on the fixing bracket. A rotating shaft is located at the output end of the motor, and the impeller is fixedly mounted at the lower end of the rotating shaft. The fan also includes an air intake mechanism and a filter mechanism. The air intake mechanism is connected to the lower part of the exhaust pipe chamber, and the filter mechanism is located at the input end of the air intake mechanism, providing air filtration functionality. The exhaust pipe is mounted on a welded... At the workshop's exhaust duct, when exhaust is needed, the motor is turned on, driving the impeller to rotate. The rotating impeller draws air from the welding workshop into the intake mechanism, where solid impurities are filtered out by the filtration system. The filtered air then enters the exhaust pipe chamber and is subsequently discharged to the outside. During exhaust, the air entering the exhaust pipe is first filtered to remove solid impurities, reducing dust and impurities adhering to the motor and impeller, ensuring normal operation of the motor and impeller, and extending the overall lifespan of the fan. It is convenient to use, highly reliable, and practical.

[0005] Preferably, the air intake mechanism includes a flexible rubber hose, an air intake pipe, and a rotating mechanism. The flexible rubber hose is fixedly installed at the lower end of the exhaust pipe and is connected to the air intake pipe. The air intake pipe is fixedly installed at the lower end of the flexible rubber hose and is connected to the flexible rubber hose. The air intake pipe is connected to the rotating mechanism, which is used to rotate the air intake pipe. When exhausting the workshop, the air in the workshop enters the exhaust pipe and is discharged sequentially through the air intake pipe and the flexible rubber hose, thus facilitating exhaust.

[0006] Preferably, the rotating mechanism includes two rotating shafts, two mounting plates, and an indexing plate. The two rotating shafts are fixedly installed on the left and right sides of the air intake pipe, respectively, and are coaxial. The indexing plate is fixedly installed on one of the mounting plates, with one rotating shaft installed at the rotating end of the indexing plate and the other rotating shaft rotatably installed on the mounting plate. Both mounting plates are fixedly installed on the top of the welding workshop. When exhausting air from the welding workshop, the indexing plate is opened, and the indexing plate rotates and tilts the mounting plate via the rotating shaft, thereby adjusting the air intake angle on the air intake pipe, increasing the range of air intake by the air intake pipe, and facilitating the exhaust of air from the welding workshop.

[0007] Preferably, the filtration mechanism includes a mounting sleeve and a filter plate. The inner sidewall of the lower part of the air intake pipe is provided with an internal thread, and the outer sidewall of the mounting sleeve is provided with an external thread. The filter plate is fixedly mounted on the mounting sleeve, and the filter plate is provided with multiple air holes that are connected vertically. The mounting sleeve is screwed into the inner thread of the lower part of the air intake pipe. With the above configuration, when gas enters the air intake pipe, the gas first passes through the filter plate, and the multiple air holes on the filter plate first filter out large particulate impurities in the gas, thus preventing large particulate impurities from entering the air intake pipe.

[0008] Preferably, it also includes an mounting ring, a filter screen, and a fixing block. The filter screen is fixedly mounted on the mounting ring, and a fixing block is mounted on the upper part of the inner sidewall of the filter plate. The mounting ring is mounted on the fixing block by bolts. With the above arrangement, the air filtered by the filter plate is filtered by the mounting ring, and small particulate impurities in the air are filtered out by the mounting ring, reducing the solid impurities entering the air intake pipe.

[0009] Preferably, it also includes a rain shield, which is fixedly installed at the upper end of the exhaust pipe. The impeller is a centrifugal impeller, and both the inner wall of the exhaust pipe and the lower end of the rain shield are provided with a sound-absorbing layer. With the above configuration, when the motor drives the impeller to rotate, the gas entering the exhaust pipe is thrown radially out by the impeller and blown onto the sound-absorbing layer on the inner wall of the exhaust pipe, reducing some of the noise. Then, the air rises in the exhaust pipe, and the air discharged in the exhaust pipe impacts the lower end of the rain shield. At the same time, the sound-absorbing layer at the lower end of the rain shield reduces the noise generated by the air impact, thereby reducing the overall noise and improving reliability. The sound-absorbing layer can be made of centrifugal glass wool, polyester fiber cotton, or damping sound insulation felt. At the same time, the motor is an explosion-proof motor, and a protective shell is installed on the motor.

[0010] Preferably, it also includes a sealing cover, and the exhaust pipe is provided with an inspection port communicating with the chamber. The sealing cover is installed on the outside of the inspection port by bolts. With the above configuration, when it is necessary to inspect or maintain the equipment in the exhaust pipe chamber, the sealing cover can be removed from the inspection port, and then the staff can enter the exhaust pipe to perform the operation; thus facilitating inspection and maintenance.

[0011] Preferably, it also includes a signal processor, a microphone, a speaker, and a computer. The microphone and speaker are both installed on the outer wall of the exhaust pipe and are connected to the computer. The computer is equipped with a signal processor. The computer is placed in the control room and monitors the noise generated by the exhaust pipe during ventilation through the microphone. The microphone transmits the noise signal to the computer. The computer analyzes the amplitude and frequency of the noise through the signal processor. Then, the computer controls the speaker to emit a sound with the same frequency as the noise but opposite amplitude, thereby neutralizing the noise. The noise generated during operation is further reduced through active noise cancellation technology.

[0012] It also includes a positioning block and a handle. The handle is fixedly installed at the lower end of the positioning block. The lower end of the filter plate is provided with a groove that matches the positioning block. The groove is coaxial with the filter plate. When it is necessary to rotate the mounting sleeve to remove it from the lower end of the air intake pipe, the operator holds the handle, inserts the positioning block into the groove at the lower end of the filter plate, and then rotates the handle. This causes the positioning block to rotate the filter plate and the mounting sleeve, thereby causing the mounting sleeve to be unscrewed from the lower end of the air intake pipe. This facilitates the removal of the mounting sleeve and improves convenience.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: during exhaust, the air entering the exhaust pipe is first filtered out by the filter mechanism to remove solid impurities, reducing the dust and impurities adhering to the motor and impeller, ensuring the normal use of the motor and impeller, ensuring the overall service life of the fan, and making it convenient to use, reliable and practical. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the first isometric structure of this utility model; Figure 2 This is a schematic diagram of the second isometric structure of this utility model; Figure 3 It is a structural diagram of the intake pipe, rotating shaft, and mounting plate, etc. Figure 4 This is a structural diagram of the motor, impeller, and mounting frame; Figure 5 This is a schematic diagram of the filtration mechanism; Figure 6 It is a structural diagram of the handle, positioning block, and mounting sleeve, etc.

[0015] The following are labels in the attached diagram: 1. Exhaust pipe; 2. Mounting bracket; 3. Fixing bracket; 4. Motor; 5. Impeller; 6. Flexible rubber hose; 7. Inlet pipe; 8. Rotating shaft; 9. Mounting plate; 10. Indexing plate; 11. Mounting sleeve; 12. Filter plate; 13. Mounting ring; 14. Filter screen; 15. Fixing block; 16. Rain shield; 17. Sealing cover; 18. Microphone; 19. Speaker; 21. Positioning block; 22. Handle. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0017] Example 1 like Figures 1 to 6This utility model discloses a marine high-flow-rate, low-noise axial flow fan, comprising an exhaust pipe 1, a mounting bracket 2, a fixing bracket 3, a motor 4, an impeller 5, an air intake mechanism, and a filter mechanism. The mounting bracket 2 is fixedly mounted on the exhaust pipe 1, and the exhaust pipe 1 has a vertically connected chamber. The fixing bracket 3 is fixedly mounted inside the chamber of the exhaust pipe 1. The motor 4 is fixedly mounted on the fixing bracket 3, and the output end of the motor 4 has a rotating shaft. The impeller 5 is fixedly mounted at the lower end of the rotating shaft. The air intake mechanism is connected to the lower part of the chamber of the exhaust pipe 1, and the input end of the air intake mechanism has a filter mechanism that filters the air. The exhaust pipe 1 is mounted on the welded... At the workshop's exhaust duct, when exhaust is required, motor 4 is turned on, and motor 4 drives impeller 5 to rotate. The rotating impeller 5 draws air from the welding workshop into the intake mechanism. The air is filtered by the filter mechanism to remove solid impurities within the intake mechanism. The filtered air then enters the chamber of exhaust pipe 1 and is subsequently discharged to the outside through exhaust pipe 1. During exhaust, the air entering exhaust pipe 1 is first filtered by the filter mechanism to remove solid impurities, reducing dust and impurities adhering to motor 4 and impeller 5. This ensures the normal operation of motor 4 and impeller 5, guarantees the overall service life of the fan, and makes it convenient to use with high reliability and practicality.

[0018] like Figure 1 and Figure 3 The air intake mechanism includes a flexible rubber hose 6, an air intake pipe 7, and a rotating mechanism. The flexible rubber hose 6 is fixedly installed at the lower end of the exhaust pipe 1 and is connected to the air intake pipe 7. The air intake pipe 7 is fixedly installed at the lower end of the flexible rubber hose 6 and is connected to the flexible rubber hose 6. The air intake pipe 7 is connected to the rotating mechanism, which is used to rotate the air intake pipe 7. When exhausting the workshop, the air in the workshop enters the exhaust pipe 1 through the air intake pipe 7 and the flexible rubber hose 6 in sequence and is then discharged, which facilitates exhaust.

[0019] like Figure 3 The rotating mechanism includes two rotating shafts 8, two mounting plates 9, and an indexing plate 10. The two rotating shafts 8 are fixedly installed on the left and right sides of the air intake pipe 7, respectively, and are coaxial. The indexing plate 10 is fixedly installed on one of the mounting plates 9. One rotating shaft 8 is installed on the rotating end of the indexing plate 10, and the other rotating shaft 8 is rotatably installed on the mounting plate 9. Both mounting plates 9 are fixedly installed on the top of the welding workshop. When exhausting air from the welding workshop, the indexing plate 10 is opened, and the indexing plate 10 rotates and tilts the mounting plate 9 through the rotating shafts 8, thereby adjusting the air intake angle on the air intake pipe 7, increasing the range of air intake by the air intake pipe 7, and facilitating the exhaust of air from the welding workshop.

[0020] like Figure 1 , Figure 5 and Figure 6The filtration mechanism includes a mounting sleeve 11 and a filter plate 12. The inner wall of the lower part of the air intake pipe 7 is provided with an internal thread, and the outer wall of the mounting sleeve 11 is provided with an external thread. The filter plate 12 is fixedly mounted on the mounting sleeve 11. The filter plate 12 is provided with multiple air holes that are connected vertically. The mounting sleeve 11 is screwed into the inner thread of the lower part of the air intake pipe 7. With the above configuration, when the gas enters the air intake pipe 7, the gas first passes through the filter plate 12 and the multiple air holes on the filter plate 12 first filter out large particulate impurities in the gas, thus preventing large particulate impurities from entering the air intake pipe 7.

[0021] It also includes a mounting ring 13, a filter screen 14, and a fixing block 15. The filter screen 14 is fixedly mounted on the mounting ring 13, and the fixing block 15 is mounted on the upper part of the inner side wall of the filter plate 12. The mounting ring 13 is mounted on the fixing block 15 by bolts. With the above arrangement, the air filtered by the filter plate 12 is filtered by the mounting ring 13, and small particulate impurities in the air are filtered out by the mounting ring 13, reducing the solid impurities entering the air intake pipe 7.

[0022] like Figure 1 and Figure 2 It also includes a rain shield 16, which is fixedly installed at the upper end of the exhaust pipe 1. The impeller 5 is a centrifugal impeller. The inner wall of the exhaust pipe 1 and the lower end of the rain shield 16 are both provided with a sound-absorbing layer. With the above configuration, when the motor 4 drives the impeller 5 to rotate, the gas entering the exhaust pipe 1 is thrown radially out by the impeller 5 and blown onto the sound-absorbing layer on the inner wall of the exhaust pipe 1, reducing some of the noise. Then the air rises in the exhaust pipe 1, and the air discharged in the exhaust pipe 1 hits the lower end of the rain shield 16. At the same time, the sound-absorbing layer at the lower end of the rain shield 16 reduces the noise generated when the air hits, reducing the overall noise and improving reliability. The sound-absorbing layer can be made of centrifugal glass wool, polyester fiber cotton or damping sound insulation felt. At the same time, the motor 4 is an explosion-proof motor and a protective shell is provided on the motor 4.

[0023] like Figure 1 It also includes a sealing cover 17. The exhaust pipe 1 is provided with an inspection port that communicates with the chamber. The sealing cover 17 is installed on the outside of the inspection port by bolts. With the above configuration, when it is necessary to inspect or maintain the equipment in the chamber of the exhaust pipe 1, the sealing cover 17 can be removed from the inspection port, and then the staff can enter the exhaust pipe 1 to carry out the operation. This facilitates inspection and maintenance.

[0024] like Figure 2It also includes a signal processor, a microphone 18, a speaker 19, and a computer. The microphone 18 and the speaker 19 are both installed on the outer wall of the exhaust pipe 1 and are connected to the computer. The computer is equipped with a signal processor. The computer is placed in the control room and monitors the noise generated by the exhaust pipe 1 during ventilation through the microphone 18. The microphone 18 transmits the noise signal to the computer. The computer analyzes the amplitude and frequency of the noise through the signal processor. Then, the computer controls the speaker 19 to emit a sound with the same frequency as the noise but opposite amplitude, thereby neutralizing the noise. The noise generated during operation is further reduced through active noise cancellation technology.

[0025] Example 2 Based on Example 1, such as Figure 6 It also includes a positioning block 21 and a handle 22. The handle 22 is fixedly installed at the lower end of the positioning block 21. The lower end of the filter plate 12 is provided with a groove that matches the positioning block 21. The groove is coaxial with the filter plate 12. When it is necessary to rotate the mounting sleeve 11 and remove the mounting sleeve 11 from the lower end of the air intake pipe 7, the operator holds the handle 22, inserts the positioning block 21 into the groove at the lower end of the filter plate 12, and then rotates the handle 22, thereby causing the positioning block 21 to drive the filter plate 12 and the mounting sleeve 11 to rotate, thereby causing the mounting sleeve 11 to be unscrewed from the lower end of the air intake pipe 7, which facilitates the removal of the mounting sleeve 11 and improves convenience.

[0026] It should be added that: all electrical equipment in this case is connected to an external controller, which coordinates and controls the operation of each piece of electrical equipment.

[0027] The flexible rubber hose 6, impeller 5, motor 4, indexing plate 10, filter plate 12, filter screen 14, microphone 18 and speaker 19 of this novel marine high-flow-rate low-noise axial flow fan are all commercially available. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0028] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A novel marine high-flow-rate low-noise axial flow fan, comprising an exhaust pipe (1), a mounting frame (2), a fixing frame (3), a motor (4), and an impeller (5), wherein the mounting frame (2) is fixedly mounted on the exhaust pipe (1), the exhaust pipe (1) has an upper and lower connected chamber, the fixing frame (3) is fixedly mounted in the chamber of the exhaust pipe (1), the motor (4) is fixedly mounted on the fixing frame (3), the output end of the motor (4) is provided with a rotating shaft, and the impeller (5) is fixedly mounted on the lower end of the rotating shaft; characterized in that, It also includes an intake mechanism and a filter mechanism. The intake mechanism is connected to the lower part of the exhaust pipe (1) chamber. The intake mechanism is equipped with a filter mechanism at its input end. The filter mechanism has the function of filtering air.

2. A new type of large flow low noise axial flow fan for marine use as claimed in claim 1, characterized in that, The air intake mechanism includes a flexible rubber hose (6), an air intake pipe (7), and a rotating mechanism. The flexible rubber hose (6) is fixedly installed at the lower end of the exhaust pipe (1) and is connected to the air intake pipe (7). The air intake pipe (7) is fixedly installed at the lower end of the flexible rubber hose (6) and is connected to the flexible rubber hose (6). The air intake pipe (7) is connected to the rotating mechanism, which is used to rotate the air intake pipe (7).

3. A new type of large flow low noise axial flow fan for marine use as claimed in claim 2, characterized in that, The rotating mechanism includes two rotating shafts (8), two mounting plates (9) and a dividing plate (10). The two rotating shafts (8) are fixedly installed on the left and right sides of the air intake pipe (7) respectively. The two rotating shafts (8) are coaxial. The dividing plate (10) is fixedly installed on one of the mounting plates (9). One rotating shaft (8) is installed on the rotating end of the dividing plate (10), and the other rotating shaft (8) is rotatably installed on the mounting plate (9).

4. A new type of large flow low noise axial flow fan for marine use as claimed in claim 2, characterized in that, The filtration mechanism includes an mounting sleeve (11) and a filter plate (12). The inner side wall of the lower part of the air inlet pipe (7) is provided with an internal thread, and the outer side wall of the mounting sleeve (11) is provided with an external thread. The filter plate (12) is fixedly installed on the mounting sleeve (11). The filter plate (12) is provided with multiple air holes that are connected vertically. The mounting sleeve (11) is screwed into the inner thread of the lower part of the air inlet pipe (7).

5. A new type of large flow low noise axial flow fan for marine use as claimed in claim 4, characterized in that, It also includes an installation ring (13), a filter screen (14) and a fixing block (15). The filter screen (14) is fixedly installed on the installation ring (13). The fixing block (15) is installed on the upper part of the inner wall of the filter plate (12). The installation ring (13) is installed on the fixing block (15) by bolts.

6. A new type of large flow low noise axial flow fan for marine use as claimed in claim 1, characterized in that, It also includes a rain shield (16), which is fixedly installed on the upper end of the exhaust pipe (1). The impeller (5) is a centrifugal impeller. The inner wall of the exhaust pipe (1) and the lower end of the rain shield (16) are both provided with a sound-absorbing layer.

7. A new type of large flow low noise axial flow fan for marine use as claimed in claim 1, characterized in that, It also includes a sealing cover (17), on which an inspection port communicating with the chamber is provided, and the sealing cover (17) is installed on the outside of the inspection port by bolts.

8. A new type of large flow low noise axial flow fan for marine use as claimed in claim 1, characterized in that, It also includes a signal processor, a microphone (18), a speaker (19) and a computer. The microphone (18) and the speaker (19) are both mounted on the outer wall of the exhaust pipe (1). The microphone (18) and the speaker (19) are both connected to the computer, which is equipped with a signal processor.

9. A new type of large flow low noise axial flow fan for marine use as claimed in claim 4, characterized in that, It also includes a positioning block (21) and a handle (22). The handle (22) is fixedly installed at the lower end of the positioning block (21). The lower end of the filter plate (12) is provided with a groove that matches the positioning block (21).

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