Fixed fan silencer

Abstract

The utility model discloses a fixed type draught fan silencer which is used for being arranged outside a draught fan in a covering mode. Comprising a silencing assembly, a pipeline silencer and a damping assembly, the silencing assembly comprises a silencing cover body, an air inlet pipe and an exhaust pipe, the air inlet pipe and the exhaust pipe are connected to the silencing cover body, a containing space is formed in the silencing cover body, and the output end of the air inlet pipe and the input end of the exhaust pipe are both located in the containing space and both connected with a connecting pipe used for being in butt joint with a draught fan. The silencing cover body is further provided with an air inlet and an air outlet, the air outlet is connected with an air outlet pipe, the air inlet and the air outlet pipe are each provided with a silencing cotton plate, and a plurality of silencing cotton plates are arranged in the air outlet pipe at intervals. The noise reduction cover body is arranged on the air inlet, so that air outside the noise reduction cover body can circulate into the noise reduction cover body, heat generated when the fan works is dissipated, it is ensured that the fan can work normally, noise reduction cotton plates are arranged at the air inlet and the air outlet pipe in a matched mode, noise reduction is conducted on air flowing in and out of the noise reduction cover body, the contact time of pipeline sound waves and noise reduction cotton is prolonged, and noise is further reduced.

Description

Technical Field

[0001] The utility model relates to the field technology of fan silencer, in particular to a fixed fan silencer. Background Art

[0002] Mechanical fans play a vital role in the industrialization of society. They are frequently used in chemical, petroleum, construction, machinery, and environmental protection industries. Suitable fans can improve production efficiency and reduce pollution. However, the intense noise generated by fans during operation can damage hearing and harm health, hinder normal communication and conversation within the workshop, and have a certain impact on production safety. If workers are exposed to noise pollution for a long time, it will seriously interfere with their rest and life, affect work efficiency, and damage their hearing and vision organs. Therefore, fan noise control is crucial.

[0003] In the prior art, a fan with a silencer structure is disclosed, in which a protective box is provided on the outside of the fan body, a connecting pipe is fixed on the top of the protective box, the upper end of the connecting pipe is connected to the air outlet duct, the lower end of the connecting pipe is fixed with a soft connecting pipe, the lower end of the soft connecting pipe is connected to the outlet of the fan, a section of rubber bellows 1 is provided on the soft connecting pipe, and a section of rubber bellows 2 is provided at the lower part of the air outlet duct. Although this structure can reduce a certain amount of noise at the air outlet duct, the installation structure is relatively complicated, which brings inconvenience to assembly, and the fan generates heat when working. The heat accumulated in the protective box is likely to affect the normal operation of the fan.

[0004] Therefore, it is necessary to design a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a fixed fan silencer device, which provides an air inlet and an air outlet in the silencer cover so that the air outside the silencer cover can flow into the silencer cover, dissipating the heat when the fan is working, ensuring that the fan can work normally, and is equipped with silencer cotton plates at the air inlet and the air outlet duct to silence the air flowing into and out of the silencer cover. At the same time, the silencer cotton plates in the air outlet duct are arranged at intervals to lengthen the contact time between the pipe sound waves and the silencer cotton, further reducing noise. In addition, the setting of the pipe silencer can reduce the noise generated when the fan is exhausted outside, and the shock-absorbing pad makes the connection between the fan and the damping spring a soft connection, which better reduces the noise generated by vibration.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A fixed fan silencer device, used for being mounted outside the fan; comprising:

[0008] A silencer assembly, comprising a silencer cover and an air intake pipe and an exhaust pipe connected to the silencer cover, wherein the silencer cover has an accommodation space, the output end of the air intake pipe and the input end of the exhaust pipe are both located in the accommodation space and are both connected to a connecting pipe for docking with a fan, the silencer cover also has an air inlet and an air outlet, the air outlet is connected to the air outlet pipe, the air inlet and the air outlet pipe are both provided with silencer cotton plates, and a plurality of silencer cotton plates are provided in the air outlet pipe and are arranged at intervals;

[0009] A pipe muffler, the pipe muffler being arranged on the portion of the exhaust pipe located outside the muffler cover;

[0010] A damping and shock absorbing component is located in the accommodating space, and comprises a damping spring and a shock absorbing pad which is arranged on the top of the damping spring and abuts against the bottom of the air supply fan.

[0011] As a preferred solution, the pipe silencer includes a shell and a perforated plate arranged in the shell, a gap is left between the shell and the perforated plate, and the gap is filled with silencer cotton.

[0012] As a preferred solution, the air outlet pipe is made of stainless steel.

[0013] As a preferred solution, the sound-absorbing cover includes a perforated rock wool board located on the outside and a damping sound insulation board located on the inside, and a cavity is formed between the perforated rock wool board and the damping sound insulation board.

[0014] As a preferred solution, the sound-absorbing cover includes a top plate and a peripheral side plate arranged at the bottom of the top plate.

[0015] As a preferred solution, the exhaust pipe is arranged on the top plate, and the air intake pipe is arranged on the peripheral side plate.

[0016] As a preferred solution, the air inlet and the exhaust pipe are located on the same side of the peripheral side plate, and the air outlet is located on the opposite side of the peripheral side plate.

[0017] As a preferred solution, a fan is fixed on the damping and shock absorbing assembly, and the bottom of the fan is against the shock absorbing pad.

[0018] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0019] Mainly, by opening an air inlet and an air outlet in the silencer cover, the air outside the silencer cover can flow into the silencer cover, dissipating the heat when the fan is working, ensuring that the fan can work normally, and silencer cotton boards are provided at the air inlet and the air outlet pipe to silence the air flowing into and out of the silencer cover. At the same time, there are multiple silencer cotton boards arranged at intervals in the air outlet pipe, which lengthens the contact time between the pipe sound waves and the silencer cotton, further reducing noise. In addition, the setting of the pipe silencer can reduce the noise generated when the fan is exhausted outside, and the shock-absorbing pad makes the connection between the fan and the damping spring a soft connection, which better reduces the noise generated by vibration.

[0020] In order to more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of a preferred embodiment of the present utility model.

[0022] Description of the accompanying drawings:

[0023] 10. Silencer assembly 11. Silencer cover

[0024] 111. Punching rock wool board 112. Damping sound insulation board

[0025] 12. Intake pipe 13. Exhaust pipe

[0026] 14. Connecting pipe 15. Air outlet pipe

[0027] 101. Accommodation space 102. Air inlet

[0028] 103. Air outlet 104. Top plate

[0029] 105, side plate 20, pipe muffler

[0030] 30. Damping and shock absorption components 40. Fan

[0031] 50. Sound-absorbing cotton board. DETAILED DESCRIPTION

[0032] First of all, it should be noted that in the description of the present invention, the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0033] Please refer to Figure 1As shown, it shows the specific structure of the preferred embodiment of the present utility model, which is a fixed fan silencer device for being covered outside the fan, and includes a silencer component 10, a duct silencer 20 and a damping and shock-absorbing component 30.

[0034] The silencer assembly 10 includes a silencer cover 11 and an air intake pipe 12 and an exhaust pipe 13 connected to the silencer cover 11. The silencer cover 11 has an accommodating space 101. The output end of the air intake pipe 12 and the input end of the exhaust pipe 13 are both located in the accommodating space 101 and are both connected to a connecting pipe 14 for docking with the fan 40. The silencer cover 11 also has an air inlet 102 and an air outlet 103. The air outlet 103 is connected to an air outlet pipe 15. The air inlet 102 and the air outlet pipe 15 are both provided with a silencer cotton board 50. The silencer cotton board 50 in the air outlet pipe 15 is provided with a plurality of spacing arrangements.

[0035] Specifically, the sound-absorbing cover 11 includes a perforated rock wool board 111 located on the outside and a damping sound insulation board 112 located on the inside. A cavity is formed between the perforated rock wool board 111 and the damping sound insulation board 112. In the conventional technology, the sound-absorbing effect is adjusted by the thickness of the perforated rock wool board 111 and the size of the punching hole. The sound-absorbing effect of such a single material is limited. By combining the perforated rock wool board 111 and the damping sound insulation board 112, the noise of the fan 40 is greatly reduced in decibels after passing through the damping sound insulation board 112-cavity-perforated rock wool board 111. Furthermore, the sound-absorbing cover 11 includes a top plate 104 and a bottom plate 104 provided at the bottom of the top plate 104. The surrounding side plate 105, the exhaust pipe 13 is arranged on the top plate 104, the air inlet pipe 12 is arranged on the surrounding side plate 105, the air inlet 102 and the exhaust pipe 13 are located on the same side of the surrounding side plate 105, and the air outlet 103 is located on the other side of the surrounding side plate 105; wherein, the sound-absorbing cotton board 50 is made by making the sound-absorbing cotton into a modular mesh panel and then fixing it inside the air outlet pipe 15, and utilizing the sound waves to convert the sound energy into heat energy through reflection and absorption by countless fibers when passing through the sound-absorbing cotton, thereby achieving the sound-absorbing effect. The air outlet pipe 15 is made of stainless steel, and the damping sound insulation board 112 is a multi-layer structure, which is an existing known technology.

[0036] The pipe silencer 20 is arranged on the part of the exhaust pipe 13 located outside the silencer cover 11. The pipe silencer 20 includes an outer shell and a perforated plate arranged in the outer shell. A gap is left between the outer shell and the perforated plate, and the gap is filled with silencer cotton. The perforated plate and the silencer cotton have dual functions to reduce noise together, and the effect is better.

[0037] The damping and shock absorbing assembly 30 is located in the accommodating space 101. The damping and shock absorbing assembly 30 includes a damping spring and a shock absorbing pad that abuts the bottom of the fan 40 arranged on the top of the damping spring. The fan 40 is fixed on the damping and shock absorbing assembly 30, and the bottom of the fan 40 abuts the shock absorbing pad.

[0038] The design focus of this utility model is:

[0039] Mainly, by opening an air inlet and an air outlet in the silencer cover, the air outside the silencer cover can flow into the silencer cover, dissipating the heat when the fan is working, ensuring that the fan can work normally, and silencer cotton boards are provided at the air inlet and the air outlet pipe to silence the air flowing into and out of the silencer cover. At the same time, there are multiple silencer cotton boards arranged at intervals in the air outlet pipe, which lengthens the contact time between the pipe sound waves and the silencer cotton, further reducing noise. In addition, the setting of the pipe silencer can reduce the noise generated when the fan is exhausted outside, and the shock-absorbing pad makes the connection between the fan and the damping spring a soft connection, which better reduces the noise generated by vibration.

[0040] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A fixed fan silencer, used for covering the outside of the fan; characterized in that: include: A silencer assembly, comprising a silencer cover and an air intake pipe and an exhaust pipe connected to the silencer cover, wherein the silencer cover has an accommodation space, the output end of the air intake pipe and the input end of the exhaust pipe are both located in the accommodation space and are both connected to a connecting pipe for docking with a fan, the silencer cover also has an air inlet and an air outlet, the air outlet is connected to the air outlet pipe, the air inlet and the air outlet pipe are both provided with silencer cotton plates, and a plurality of silencer cotton plates are provided in the air outlet pipe and are arranged at intervals; A pipe muffler, the pipe muffler being arranged on the portion of the exhaust pipe located outside the muffler cover; A damping and shock absorbing component is located in the accommodating space, and comprises a damping spring and a shock absorbing pad which is arranged on the top of the damping spring and abuts against the bottom of the air supply fan.

2. A fixed fan silencer according to claim 1, characterized in that: The pipe silencer comprises a shell and a perforated plate arranged in the shell, a gap is left between the shell and the perforated plate, and the gap is filled with silencer cotton.

3. A fixed fan silencer according to claim 1, characterized in that: The air outlet pipe is made of stainless steel.

4. A fixed fan silencer according to claim 1, characterized in that: The sound-absorbing cover includes a perforated rock wool board located on the outside and a damping sound insulation board located on the inside, and a cavity is formed between the perforated rock wool board and the damping sound insulation board.

5. A fixed fan silencer according to claim 1, characterized in that: The sound-absorbing cover comprises a top plate and a peripheral side plate arranged at the bottom of the top plate.

6. A fixed fan silencer according to claim 5, characterized in that: The exhaust pipe is arranged on the top plate, and the air intake pipe is arranged on the peripheral side plate.

7. A fixed fan silencer according to claim 6, characterized in that: The air inlet and the exhaust pipe are located on the same side of the peripheral side plate, and the air outlet is located on the other side opposite to the peripheral side plate.

8. A fixed fan silencer according to claim 6, characterized in that: A fan is fixed on the damping and shock absorbing assembly, and the bottom of the fan is against the shock absorbing pad.

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