Laboratory air inlet silencer of high-speed centrifugal blower

Abstract

The utility model relates to the technical field of silencing devices, and provides a laboratory air inlet silencing device of a high-speed centrifugal blower, which comprises a shell, an air inlet channel and an air outlet channel are respectively arranged on two sides of the shell, and the inner wall surfaces of two ends of the shell are fixedly connected with a support. A sound insulation baffle is fixedly connected between the inner wall surface of the shell and the support in the inclined direction, and reinforcing ribs are fixedly connected between the sound insulation baffle and the support in the inclined direction. The outer layer of the soundproof baffle is a plurality of layers of soundproof mesh plates which are arranged in a staggered manner, the inner layer of the soundproof baffle is soundproof cotton, and the reinforcing ribs are inclined supports; the number of the supports is two, the supports are symmetrically distributed, the number of the supports corresponds to the number of the sound insulation baffles, and the inclination direction of the ends, away from the supports, of the sound insulation baffles is the opening direction of the air outlet channel. By means of the technical scheme, the problems that an existing silencer is complex in structure, small in occupied size, high in process requirement and general in noise reduction effect are solved, and a better using effect can be achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of silencing devices, specifically to a laboratory air intake silencing device for a high-speed centrifugal blower. Background Technology

[0002] A noise reduction device is a device used to eliminate noise generated by machinery and other equipment. By setting up a noise reduction device, the noise generated can be effectively reduced, thereby improving the working or living environment of people in the surrounding area and reducing noise in the corresponding area, so as to bring a better experience to people's work and life.

[0003] A search revealed a Roots blower inlet noise reduction device with authorization announcement number CN221442851U. This utility model describes a device that, after the airflow noise generated by the Roots blower is transmitted to the inside of the installation pipe through the outlet pipe, uses several sets of annular noise reduction plates to perform preliminary noise reduction treatment. Some of the airflow noise is then transmitted to the inside of the corrugated sound-absorbing cotton through the third through hole. After that, it undergoes three more noise reduction treatments through the corrugated sound-absorbing cotton, polystyrene perlite board, and foam plastic layer. After four noise reduction treatments, the airflow noise at the Roots blower inlet can be effectively reduced, and the inlet noise reduction device will not affect the daily inspection and maintenance of the entire Roots blower.

[0004] However, the existing silencing devices mentioned above are complex in structure, occupy a small volume, have high process requirements, and have only average noise reduction effect. Therefore, we propose a laboratory air intake silencing device for high-speed centrifugal blowers. Utility Model Content

[0005] This invention proposes a laboratory air intake silencing device for a high-speed centrifugal blower, which solves the problems mentioned in the background art and achieves better noise reduction in the laboratory.

[0006] The technical solution of this utility model is as follows:

[0007] A laboratory air intake silencing device for a high-speed centrifugal blower includes an outer shell, an air inlet channel and an air outlet channel respectively provided on both sides of the outer shell, a bracket fixedly connected to the inner wall surface at both ends of the outer shell, a sound insulation baffle fixedly connected obliquely between the inner wall surface of the outer shell and the bracket, and a reinforcing rib fixedly connected obliquely between the sound insulation baffle and the bracket.

[0008] The outer layer of the soundproof baffle consists of several layers of soundproof mesh placed in an alternating manner, the inner layer is soundproof cotton, and the reinforcing ribs are inclined supports.

[0009] As a further technical solution of this utility model, the number of brackets is two sets and they are symmetrically distributed, and the number of sound insulation baffles corresponding to each set of brackets is two sets.

[0010] As a further technical solution of this utility model, the inclined direction of the sound insulation baffle away from the support is the opening direction of the air outlet channel, and the number of reinforcing ribs corresponding to one set of the sound insulation baffle is two sets and symmetrically distributed. The air inlet channel and the air outlet channel both adopt a vertical louver structure.

[0011] As a further technical solution of this utility model, one end of the sound insulation baffle is connected to an adjustment structure, the adjustment structure includes a groove formed on the surface of one end of the sound insulation baffle, a sliding plate is slidably connected inside the sound insulation baffle, and a tension spring is connected between the sliding plate and the inner wall of the sound insulation baffle.

[0012] As a further technical solution of this utility model, rollers are rotatably connected to both sides of the sliding plate, a protruding head is fixedly connected to one end of the sliding plate, a limit strip is fixedly connected to the inner side of the sound insulation baffle near the sliding groove port, and a reinforcing baffle is fixedly connected to the outer surface of the protruding head. The materials of the reinforcing baffle, the sliding plate and the protruding head are the same as the material of the sound insulation baffle.

[0013] As a further technical solution of this utility model, the sliding plate slides along the opening direction of the groove, the thickness of the sliding plate is less than the groove opening thickness, and the elastic ends of the tension spring are fixedly connected to the inner walls of the sliding plate and the sound insulation baffle, respectively.

[0014] As a further technical solution of this utility model, the roller is connected to the inner wall of the sound insulation baffle by rolling, the roller is connected to the sliding plate by bearing by rotation, and the number of rollers is several groups and they are distributed in an array.

[0015] As a further technical solution of this utility model, the protruding head is used to limit the maximum distance of the sliding plate retracting into the groove, and the reinforcing baffle is inclined, with the inclined direction of the end of the reinforcing baffle away from the protruding head being the direction of the air inlet channel.

[0016] The working principle and beneficial effects of this utility model are as follows:

[0017] In this invention, through the functions of sound insulation baffles, reinforcing ribs, air inlet channels, and air outlet channels, airflow is blown into the interior through the louver gaps at the air inlet channel during use. The sound insulation baffles reflect and guide the airflow to the gaps between two adjacent sets of sound insulation baffles for noise reduction. At the same time, some airflow passes through the surface of the sound insulation baffles. After being reduced by the sound insulation cotton and sound insulation mesh, a good noise reduction effect can be achieved. Moreover, the structure is simple, the process requirements are not high, and the noise reduction effect is good. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the device structure of this utility model;

[0020] Figure 2 This utility model Figure 1 A schematic diagram of the cut-out section of the structure;

[0021] Figure 3 This is a partial structural diagram of the device for configuring the adjustment structure according to this utility model;

[0022] Figure 4 This utility model Figure 3 A schematic diagram of the partial structure cut out from another perspective;

[0023] Figure 5 This utility model Figure 4 A magnified view of the local structure.

[0024] In the diagram: 1. Outer shell; 2. Air inlet channel; 3. Air outlet channel; 4. Bracket; 5. Sound insulation baffle; 6. Reinforcing rib; 7. Adjustment structure; 71. Slide groove; 72. Sliding plate; 73. Tension spring; 74. Roller; 75. Protruding head; 76. Limiting strip; 77. Reinforcing baffle. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. Example 1

[0026] like Figures 1-3 As shown, this embodiment proposes a laboratory air intake silencing device for a high-speed centrifugal blower, including a housing 1. An air inlet channel 2 and an air outlet channel 3 are respectively provided on both sides of the housing 1. A bracket 4 is fixedly connected to the inner wall surface at both ends of the housing 1. A sound insulation baffle 5 is obliquely fixedly connected between the inner wall surface of the housing 1 and the bracket 4. A reinforcing rib 6 is obliquely fixedly connected between the sound insulation baffle 5 and the bracket 4.

[0027] The outer layer of the soundproof baffle 5 consists of several layers of soundproof mesh placed in an alternating manner, the inner layer is soundproof cotton, and the reinforcing rib 6 is an inclined support.

[0028] There are two sets of brackets 4, which are symmetrically distributed. Each set of brackets 4 corresponds to two sets of sound insulation baffles 5.

[0029] The direction of inclination of the sound insulation baffle 5 away from the support 4 is the opening direction of the air outlet duct 3. There are two sets of reinforcing ribs 6 corresponding to one set of sound insulation baffles 5, and they are symmetrically distributed. The air inlet duct 2 and the air outlet duct 3 both adopt a vertical louver structure.

[0030] In this embodiment, during use, airflow is blown into the interior through the louver gaps at the air inlet channel 2. The airflow is reflected and guided by the sound insulation baffles 5 to the gaps between the two adjacent sets of sound insulation baffles 5 for noise reduction. At the same time, some wind force passes through the surface of the sound insulation baffles 5. After the noise reduction effect of the sound insulation cotton and the sound insulation mesh, a good noise reduction effect can be achieved. Moreover, the structure is simple, the process requirements are not high, and the noise reduction effect is good. Example 2

[0031] like Figures 4-5 As shown, based on Embodiment 1, an adjustment structure 7 is also proposed to be connected to one end of the sound insulation baffle 5. The adjustment structure 7 includes a groove 71 opened on the surface of one end of the sound insulation baffle 5, a sliding plate 72 is slidably connected inside the sound insulation baffle 5, and a tension spring 73 is connected between the sliding plate 72 and the inner wall of the sound insulation baffle 5.

[0032] Rollers 74 are rotatably connected to both sides of the sliding plate 72. A protruding head 75 is fixedly connected to one end of the sliding plate 72. A limit strip 76 is fixedly connected to the inner side of the sound insulation baffle 5 near the port of the slide groove 71. A reinforcing baffle 77 is fixedly connected to the outer surface of the protruding head 75. The materials of the reinforcing baffle 77, the sliding plate 72 and the protruding head 75 are the same as the material of the sound insulation baffle 5.

[0033] The sliding plate 72 slides along the opening direction of the groove 71. The thickness of the sliding plate 72 is less than the groove thickness of the groove 71. The elastic ends of the tension spring 73 are fixedly connected to the inner walls of the sliding plate 72 and the sound insulation baffle 5, respectively. The roller 74 is connected to the inner wall of the sound insulation baffle 5 by rolling. The roller 74 is connected to the sliding plate 72 by bearings. The number of rollers 74 is several groups and they are distributed in an array. The protruding head 75 is used to limit the maximum distance of the sliding plate 72 to retract into the groove 71. The reinforcing baffle 77 is inclined. The inclined direction of the end of the reinforcing baffle 77 away from the protruding head 75 is the direction of the air inlet channel 2.

[0034] In this embodiment, during use, the impact force of airflow can cause the reinforcing baffle 77 and the protruding head 75 to move the sliding plate 72 away from the sound insulation baffle 5 by a certain distance, thereby increasing the area of ​​the noise reduction material and thus achieving a better noise reduction effect.

[0035] In summary, the specific principle of this utility model is as follows:

[0036] During use, the airflow first enters the interior of the outer casing 1 through the air inlet channel 2. After being reduced in noise by the sound insulation baffle 5, it can finally be blown outward from the opening of the air outlet channel 3. The airflow is reflected and guided by the sound insulation baffle 5 to the gap between the two adjacent sets of sound insulation baffles 5 for noise reduction. At the same time, some airflow will pass through the surface of the sound insulation baffle 5 and achieve better noise reduction effect after being reduced in noise by the sound insulation cotton and sound insulation mesh. Meanwhile, the whole structure is simple, the noise reduction effect is obvious, and the process requirements are not high.

[0037] Meanwhile, as air blows into the interior of the outer casing 1 from the air inlet channel 2, the airflow can move the reinforcing baffle 77. After being subjected to force, the reinforcing baffle 77 can be moved a distance away from the sound insulation baffle 5. At this time, the tension spring 73 will be stretched a distance away, and the reinforcing baffle 77, the protruding head 75, and the sliding plate 72 will move outward and be exposed, thereby increasing the contact area between the noise reduction material and the airflow, thus achieving a better noise reduction effect.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high speed centrifugal blower laboratory intake silencer device comprising a housing (1), characterized in that, Both sides of the shell (1) are respectively provided with air inlet channel (2) and air outlet channel (3), the inner wall surface of the shell (1) is fixedly connected with support (4), the inner wall surface of the shell (1) and support (4) are fixedly connected with sound insulation baffle (5) obliquely, the sound insulation baffle (5) and support (4) are fixedly connected with reinforcing rib (6) obliquely. The outer layer of the sound insulation baffle (5) is a plurality of layers of sound insulation net-shaped plates arranged alternately, and the inner layer is sound insulation cotton.

2. The high-speed centrifugal blower laboratory intake silencer of claim 1, wherein, The number of the support (4) is two groups and is symmetrically distributed, and the number of the sound insulation baffle (5) corresponding to one group of the support (4) is two groups.

3. The high-speed centrifugal blower laboratory intake silencer of claim 2, wherein, The inclined direction of one end of the sound insulation baffle (5) away from the support (4) is the opening direction of the air outlet channel (3), the number of the sound insulation baffle (5) corresponding to one group of the reinforcing rib (6) is two groups and is symmetrically distributed, and the channel of the air inlet channel (2) and the air outlet channel (3) adopts a vertical louver structure.

4. The high-speed centrifugal blower laboratory intake sound attenuation device of claim 1, wherein, One end of the sound insulation baffle (5) is connected with an adjusting structure (7), the adjusting structure (7) comprises a sliding groove (71) formed in the surface of one end of the sound insulation baffle (5), the sound insulation baffle (5) is slidably connected with a sliding plate (72) inside, and the sliding plate (72) and the inner wall of the sound insulation baffle (5) are connected with a tension spring (73).

5. The high-speed centrifugal blower laboratory intake silencer of claim 4, wherein, Both side surfaces of the sliding plate (72) are rotatably connected with rollers (74), one end of the sliding plate (72) is fixedly connected with a protruding head (75), the inner side of the sound insulation baffle (5) is fixedly connected with a limiting strip (76) near the port of the sliding groove (71), the outer surface of the protruding head (75) is fixedly connected with a reinforcing baffle (77), and the materials of the reinforcing baffle (77), the sliding plate (72) and the protruding head (75) are the same as that of the sound insulation baffle (5).

6. The high-speed centrifugal blower laboratory intake sound attenuation device of claim 5, wherein, The sliding plate (72) slides along the opening direction of the sliding groove (71), the thickness of the sliding plate (72) is less than the slot thickness of the sliding groove (71), and the elastic ends of the tension spring (73) are fixedly connected with the sliding plate (72) and the inner wall of the sound insulation baffle (5) respectively.

7. The high-speed centrifugal blower laboratory intake sound attenuation device of claim 5, wherein, The rollers (74) and the inner wall of the sound insulation baffle (5) are rollingly connected, the rollers (74) are rotatably connected with the sliding plate (72) through bearings, and the number of the rollers (74) is several groups and is arrayed.

8. The high-speed centrifugal blower laboratory intake sound attenuation device of claim 5, wherein, The protruding head (75) is used for limiting the maximum distance of the sliding plate (72) from shrinking into the sliding groove (71), the reinforcing baffle (77) is arranged obliquely, and the inclined direction of one end of the reinforcing baffle (77) away from the protruding head (75) is the direction of the air inlet channel (2).

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