A noise reduction device for a fluidic fan

Abstract

The utility model discloses a jet fan noise reduction device relates to jet fan noise reduction technical field. The utility model discloses a blower and silencer still includes the dirt suction cover, the conveying pipe, pushes the piece and the air pump. The utility model discloses through servo motor drive pivot and transmission wheel rotation, push and transmission wheel meshing's clamping plate removes, and clamping plate drives hard pipe body to slide in the inside of the sliding slot, thereby control hard pipe body both ends dirt suction cover in the inside of silencer and carry out reciprocating motion, make the air inlet hole of dirt suction cover pass each place muffling hole of sleeve, carry out suction cleaning to the dirt that adheres, jams in the inner wall of sleeve and muffling hole, through the air pump and air, make dirt suction cover place form negative pressure, and the dirt of sleeve place passes dirt suction cover, hard pipe body, soft pipe body to the air pump place, and exhaust to the outside, complete the regular cleaning of sleeve, avoid the difficulty of timely cleaning internal adhering dirt of a large number of jet fan that the tunnel, garage etc. place set up.

Description

Technical Field

[0001] This utility model relates to the field of noise reduction technology for jet fans, and specifically to a noise reduction device for jet fans. Background Technology

[0002] Jet fans, as a highly efficient gas delivery device, are widely used in ventilation systems in places such as highway tunnels and underground garages. Their working principle is to induce the surrounding air to flow through high-speed jet airflow, forming a powerful directional jet to achieve the purpose of ventilation.

[0003] To reduce the aerodynamic noise generated during equipment operation and ensure compliance with environmental noise standards, cylindrical silencers are installed at the inlet and outlet ends of the jet fan. The silencer's inner wall has numerous holes connected to the sound-absorbing material inside, thus reducing noise.

[0004] When jet fans operate in harsh environments, the high-speed airflow carries a large amount of dust and other impurities through the silencer. Tiny particles are easily impacted and adhered to the inner wall and the edges of the holes of the silencer under the disturbance of the airflow, causing blockage of the holes and other adverse conditions. It is difficult to clean in time, which reduces the noise reduction of the silencer, causes the fan to exceed the noise standard, and affects the normal operation of the equipment. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a noise reduction device for jet fans, which solves the problem that impurities easily adhere to the inner wall of the silencer of jet fans, causing blockage of surface holes and making cleaning very inconvenient.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a jet fan noise reduction device, including a blower and a silencer, further including a suction hood, a conveying pipe, a pusher, and an air pump. The silencer consists of two sets, which are fixedly installed at the inlet and outlet of the front and rear ends of the blower. The suction hood consists of two sets, which are slidably installed inside the silencer. The air inlet end of the suction hood faces the inner wall of the silencer. The two ends of the conveying pipe are fixedly connected to the two sets of suction hoods, and the conveying pipe is slidably inserted into the blower. A pusher is provided on the top of the blower, and the rotating end of the pusher is meshed with the top surface of the conveying pipe. An air pump is provided on the top of the blower, and the air pump is connected to the air outlet end of the conveying pipe.

[0007] The air supply device includes an air duct, a fixed frame, a drive motor, and fan blades. The fixed frame is fixedly installed on the top of the air duct, the drive motor is fixedly installed inside the air duct, and there are two sets of fan blades, which are connected to the two output ends of the drive motor.

[0008] The top of the air duct has a sliding groove that runs through its front and rear ends, and the conveying pipe is slidably installed inside the sliding groove.

[0009] The silencer includes a sleeve, a protective plate, and a sound-absorbing layer. The sleeve is fixedly installed at both ends of the air supply unit. The protective plate is fixedly installed on the side of the sleeve away from the air supply unit. The inside of the sleeve is filled with a sound-absorbing layer.

[0010] The inner wall of the sleeve is provided with a sound-absorbing hole, and the outer side of the suction hood is provided with multiple sets of air inlets arranged in a circular array, and the air inlets of the suction hood are corresponding to the sound-absorbing holes of the sleeve.

[0011] The conveying pipe includes a rigid pipe body, a clamping plate, and a flexible pipe body. The front and rear ends of the rigid pipe body are connected to the suction hood and are in a continuous configuration. The clamping plate is fixedly installed on the top of the rigid pipe body, and a clamping groove is opened on the top of the clamping plate. The flexible pipe body is fixedly connected to the top of the rigid pipe body and is connected to the air pump's suction end and is in a continuous configuration.

[0012] The length of the rigid tube is the sum of the lengths of the air supply unit and the silencer.

[0013] The pusher includes a rotating shaft, a transmission wheel, and a servo motor. The rotating shaft is rotatably mounted on the top of the blower, and the transmission wheel is fixedly mounted on the surface of the rotating shaft. The servo motor is fixedly mounted on the top of the blower, and the output end of the servo motor is connected to one end of the rotating shaft.

[0014] The beneficial effects of this utility model are as follows: This invention uses a servo motor to drive a rotating shaft and a transmission wheel to rotate, which in turn moves a clamping plate meshing with the transmission wheel. The clamping plate causes the rigid tube to slide inside the groove, thereby controlling the reciprocating movement of the suction hoods at both ends of the rigid tube inside the silencer. This allows the air inlet of the suction hood to pass through the silencer holes of the sleeve, removing and cleaning impurities attached to or clogging the inner wall of the sleeve and the silencer holes. By using an air pump to draw air, a negative pressure is created at the suction hood. Impurities at the sleeve pass through the suction hood, the rigid tube, and the flexible tube to the air pump and are discharged to the outside, completing the periodic cleaning of the sleeve. This avoids the problem of numerous jet fans installed in tunnels, garages, and other places being unable to clean internal impurities in a timely manner, thus affecting the operating efficiency of the equipment. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the present invention; Figure 3 This is a partial cross-sectional view of the present invention; Figure 4 This is a partial cross-sectional view of the present invention; Figure 5 This is a partial cross-sectional view of the present invention; Figure 6This is a partial cross-sectional view of the present invention.

[0016] Reference numerals: 1. Blower; 101. Air duct; 102. Fixing frame; 103. Drive motor; 104. Fan blade; 105. Slide groove; 2. Silencer; 201. Sleeve; 202. Protective plate; 203. Sound-absorbing layer; 3. Sewage suction hood; 4. Conveying pipe; 401. Rigid pipe body; 402. Clamping plate; 403. Flexible pipe body; 5. Pushing component; 501. Rotating shaft; 502. Transmission wheel; 503. Servo motor; 6. Air pump. Detailed Implementation

[0017] The present invention will be further described below with reference to specific embodiments. However, those skilled in the art should understand that the detailed description given here with reference to the accompanying drawings is for better explanation. The structure of the present invention may exceed the limited embodiments described herein. Some equivalent alternatives or common means will not be described in detail here, but they still fall within the protection scope of this application.

[0018] Figures 1-6 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figure 1 - Appendix Figure 6 The present invention will be further described below.

[0019] A jet fan noise reduction device includes a blower 1 and a silencer 2, as well as a suction hood 3, a conveying pipe 4, a pusher 5, and an air pump 6. There are two sets of silencers 2, which are fixedly installed at the inlet and outlet of the front and rear ends of the blower 1. There are two sets of suction hoods 3, which are slidably installed inside the silencer 2. The air inlet end of the suction hood 3 faces the inner wall of the silencer 2. The two ends of the conveying pipe 4 are fixedly connected to the two sets of suction hoods 3, and the conveying pipe 4 is slidably inserted into the blower 1. The top of the blower 1 is provided with a pusher 5, and the rotating end of the pusher 5 is meshed with the top surface of the conveying pipe 4. The top of the blower 1 is provided with an air pump 6, which is connected to the air outlet end of the conveying pipe 4. Specifically, the blower 1 drives the air to flow at high speed, guiding the surrounding air to form a directional jet. The silencer 2 reduces the aerodynamic noise generated by the operation of the blower 1. The suction hood 3 removes and cleans the dust and debris attached to and clogging the inner wall and holes of the silencer 2. The forward and backward movement of the conveying pipe 4 drives the suction hoods 3 at both ends to move synchronously, and the debris sucked up by the suction hoods 3 is transported to the air pump 6 and discharged to the outside. The rotation of the pusher 5 drives the conveying pipe 4 to move horizontally.

[0020] The air blower 1 includes an air duct 101, a fixing frame 102, a drive motor 103, and fan blades 104. The fixing frame 102 is fixedly installed on the top of the air duct 101, the drive motor 103 is fixedly installed inside the air duct 101, and there are two sets of fan blades 104, which are connected to the two output ends of the drive motor 103. Specifically, the drive motor 103 drives the fan blades 104 to rotate, thereby guiding the surrounding airflow and forming a directional jet to achieve the purpose of accelerating ventilation in the workplace.

[0021] The top of the air duct 101 is provided with a sliding groove 105 that runs through its front and rear ends, and the conveying pipe 4 is slidably installed inside the sliding groove 105. Specifically, the conveying pipe 4 is restricted to slide back and forth on the surface of the air duct 101 by the chute 105, so as to ensure the stable progress of the cleaning process at the silencer 2.

[0022] The silencer 2 includes a sleeve 201, a protective plate 202 and a sound-absorbing layer 203. The sleeve 201 is fixedly installed at both ends of the air blower 1. The protective plate 202 is fixedly installed on the side of the sleeve 201 away from the air blower 1. The inside of the sleeve 201 is filled with a sound-absorbing layer 203. Specifically, the protective plate 202 protects the inlet and outlet of the device to prevent large external objects from entering the jet fan and affecting the operation of the device, and the sound-absorbing layer 203 absorbs and reduces aerodynamic noise.

[0023] The inner wall of the sleeve 201 is provided with a sound-absorbing hole, and the outer side of the suction hood 3 is provided with multiple sets of air inlets arranged in a circular array, and the air inlets of the suction hood 3 are corresponding to the sound-absorbing holes of the sleeve 201. Specifically, the impurities in the soundproof holes of the sleeve 201 are thoroughly cleared and cleaned through the air inlet of the suction hood 3.

[0024] The conveying pipe 4 includes a rigid pipe body 401, a clamping plate 402, and a flexible pipe body 403. The rigid pipe body 401 is slidably installed inside the slide groove 105. The front and rear ends of the rigid pipe body 401 are connected to the suction hood 3 and are in a communicating arrangement. The clamping plate 402 is fixedly installed on the top of the rigid pipe body 401. The top of the clamping plate 402 has a slot, which is corresponding to the drive wheel 502. The flexible pipe body 403 is fixedly connected to the top of the rigid pipe body 401. The flexible pipe body 403 is connected to the air pump 6 and is in a communicating arrangement. Filter bags and other filter components can be installed at the air pump 6 outlet as needed to prevent impurities from flowing back to the workplace and spreading. Specifically, the rigid tube 401 supports and pushes the two sets of suction hoods 3 to move horizontally inside the muffler 2, and the impurities sucked up by the suction hoods 3 are transported to the air pump 6 by the rigid tube 401 and the flexible tube 403. The rotation of the drive wheel 502 is driven by the slot of the clamping plate 402 to push the conveying pipe 4 to slide stably inside the slide groove 105.

[0025] The length of the rigid tube 401 is the sum of the lengths of the air blower 1 and the silencer 2; Specifically, the rigid tube 401 allows the two sets of suction hoods 3 to be located at the ends of the two sets of silencers 2 near the blower 1 and the raw material blower 1, respectively, so as to avoid blocking the sound-absorbing holes of the silencer 2 and affecting the noise reduction work.

[0026] The pusher 5 includes a rotating shaft 501, a transmission wheel 502, and a servo motor 503. The rotating shaft 501 is rotatably mounted on the top of the blower 1. The transmission wheel 502 is fixedly mounted on the surface of the rotating shaft 501. The transmission wheel 502 is meshed with the slot of the card plate 402. The servo motor 503 is fixedly mounted on the top of the blower 1, and the output end of the servo motor 503 is connected to one end of the rotating shaft 501. Specifically, the rotation of the shaft 501 of the servo motor 503 and the transmission wheel 502 drives the conveying pipe 4, which is meshed with the transmission wheel 502, to move. By changing the rotation direction of the output end of the servo motor 503, the moving direction of the conveying pipe 4 can be switched.

[0027] In summary: When this utility model is in use, the staff can use the device to achieve ventilation in places such as tunnels and garages. The drive motor 103 drives the fan blades 104 to rotate, guiding the surrounding air flow to form a directional jet, which accelerates the gas flow in the workplace. The aerodynamic noise generated during the operation of the device can be absorbed by the sound-absorbing layer 203 guided by the sound-absorbing holes of the sleeve 201, reducing the noise propagation. However, the air in the workplace often carries a large amount of dust and other impurities, which enter the interior of the blower 1 and silencer 2 with the airflow. These impurities easily adhere to the sound-absorbing holes on the inner wall of the sleeve 201, causing blockage and affecting the noise reduction effect. The pusher 5 and air pump 6 can be periodically driven. The air pump 6 draws air to create a negative pressure at the suction hood 3, which sucks away and cleans the impurities on the inner wall of the sleeve 201. The servo motor 503 is also activated, which drives the rotating shaft 501 and the transmission wheel 502 to rotate. The rotation is achieved by the meshing of the transmission wheel 502 with the slot of the card plate 402. The drive wheel 502 drives the conveying pipe 4 to slide on the inner wall of the chute 105, thereby pushing the suction hoods 3 at both ends of the conveying pipe 4 to move horizontally inside the sleeve 201, thoroughly cleaning the impurities in the inner wall of the sleeve 201 and the silencer holes. The impurities pass through the suction hoods 3, the rigid pipe 401 and the flexible pipe 403 to the air pump 6 and are discharged to the outside, completing the periodic cleaning of the sleeve 201. The two sets of suction hoods 3 are moved to one end inside the two sets of silencers 2, the operation of the pusher 5 and the air pump 6 is stopped, and the drive motor 103 is started again to carry out ventilation.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. A noise reduction device for a jet fan, comprising a blower (1) and a silencer (2), characterized in that, It also includes a suction hood (3), a conveying pipe (4), a pusher (5) and an air pump (6). There are two sets of silencers (2), which are fixedly installed at the front and rear inlet and outlet of the blower (1). There are two sets of suction hoods (3), which are slidably installed inside the silencer (2). The air inlet of the suction hood (3) faces the inner wall of the silencer (2). The two ends of the conveying pipe (4) are fixedly connected to the two sets of suction hoods (3), and the conveying pipe (4) is slidably inserted into the blower (1). The pusher (5) is set on the top of the blower (1), and the rotating end of the pusher (5) is meshed with the top surface of the conveying pipe (4). The air pump (6) is set on the top of the blower (1) and is connected to the air outlet of the conveying pipe (4).

2. The noise reduction device for a jet fan according to claim 1, characterized in that, The air blower (1) includes a duct (101), a mounting bracket (102), a drive motor (103), and fan blades (104). The mounting bracket (102) is fixedly installed on the top of the duct (101), the drive motor (103) is fixedly installed inside the duct (101), and there are two sets of fan blades (104), which are connected to the two output ends of the drive motor (103).

3. The noise reduction device for a jet fan according to claim 2, characterized in that, The top of the air duct (101) is provided with a sliding groove (105) that runs through its front and rear ends, and the conveying pipe (4) is slidably installed inside the sliding groove (105).

4. The noise reduction device for a jet fan according to claim 1, characterized in that, The silencer (2) includes a sleeve (201), a protective plate (202) and a sound-absorbing layer (203). The sleeve (201) is fixedly installed at the front and rear ends of the blower (1). The protective plate (202) is fixedly installed on the side of the sleeve (201) away from the blower (1). The inside of the sleeve (201) is filled with a sound-absorbing layer (203).

5. The noise reduction device for a jet fan according to claim 4, characterized in that, The inner wall of the sleeve (201) is provided with a sound-absorbing hole, and the outer side of the suction hood (3) is provided with multiple sets of air inlets arranged in a circular array, and the air inlets of the suction hood (3) are corresponding to the sound-absorbing holes of the sleeve (201).

6. The noise reduction device for a jet fan according to claim 1, characterized in that, The conveying pipe (4) includes a rigid pipe body (401), a clamping plate (402), and a flexible pipe body (403). The front and rear ends of the rigid pipe body (401) are connected to the suction hood (3) and are in a continuous arrangement. The clamping plate (402) is fixedly installed on the top of the rigid pipe body (401). The top of the clamping plate (402) has a slot. The top of the rigid pipe body (401) is fixedly connected to the flexible pipe body (403). The flexible pipe body (403) is connected to the air pump (6) and is in a continuous arrangement.

7. The noise reduction device for a jet fan according to claim 6, characterized in that, The length of the rigid tube (401) is the sum of the lengths of the blower (1) and the silencer (2).

8. The noise reduction device for a jet fan according to claim 1, characterized in that, The pusher (5) includes a rotating shaft (501), a transmission wheel (502) and a servo motor (503). The rotating shaft (501) is rotatably mounted on the top of the blower (1). The transmission wheel (502) is fixedly mounted on the surface of the rotating shaft (501). The servo motor (503) is fixedly mounted on the top of the blower (1), and the output end of the servo motor (503) is connected to one end of the rotating shaft (501).

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