Silencing equipment special for grain drying

Abstract

The utility model relates to the technical field of grain drying, and discloses a special silencing device for grain drying, which comprises a silencing room, a main fan and a silencing component, the main fan is positioned in the middle of the interior of the silencing room, and a corresponding gap is reserved between the main fan and the inner wall of a wall body. According to the special silencing equipment for grain drying, the whole main fan is placed in a closed special room, and noise is converted into other energy through the silencing plates on the inner wall and the silencing materials in the interlayer; meanwhile, the outlet of the main fan and the air return hole are each provided with a silencer, noise generated by air running rapidly in an air pipe is converted into other energy through a noise reduction plate on the inner wall of the straight pipe type silencer and a noise reduction material in an interlayer, and the noise reduction function is achieved; in addition, the shock absorber and the flexible connector are adopted, vibration generated in the operation process of the main fan is controlled from the source to be not diffused outwards, noise generated by vibration is reduced, and the noise problem of the fan is comprehensively solved through the three aspects.

Description

Technical Field

[0001] The utility model relates to the technical field of grain drying, in particular to a special silencing device for grain drying. Background Art

[0002] Food security is an important indicator of a country and an important part of national security. Food security refers to sufficient food supply, quality safety, stable prices and consumer satisfaction. Among them, quality safety is the foundation. To ensure quality safety, we must start with raw grains. And grain drying is one of the important links to ensure the quality of raw grains. In recent years, with the continuous improvement of my country's grain drying rate, grain drying lines have been built in large numbers in grain enterprises across the country. When building such projects, there is a problem that has not been solved for many years - noise.

[0003] In the design process of grain drying line, fans need to be configured to solve the heat exchange between wind and grain and to perform dust removal operations. For example: the main fan of the dryer; the fan configured with pulse dust removal, etc., these fans will generate large noise. Taking a drying line with 5 dryers (30 tons / unit) as an example, 5 22.5kw centrifugal fans and 1 15kw dust removal fan are required. The volume of each fan is between 110-130 decibels, and the comprehensive volume of the drying workshop is between 130-150 decibels. In the absence of silencing equipment, it is very difficult for operators to communicate in language when working on site, which will not only affect the normal drying operation, but also seriously affect the health of workers. According to the requirements of my country's noise standards, the noise level is 50-70 decibels during the day and 40-60 decibels at night. Obviously, the noise generated by the existing grain drying line far exceeds the national standard value. Even if a straight pipe silencer is installed at the inlet and outlet of the fan in some projects to solve the noise problem, the volume of the entire drying workshop is still above 110 decibels. This kind of working environment is totally inconsistent with the modern grain preservation policy. Therefore, a special silencing equipment for grain drying is proposed to solve the above-mentioned problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a special silencing device for grain drying, which has the advantages of converting noise into other energy to achieve silencing function, and solves the problem of excessive noise when traditional fans are working.

[0006] (II) Technical solution

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A special silencing device for grain drying, comprising a silencing room, a main fan and a silencing component, wherein the main fan is located in the middle of the silencing room and has a corresponding gap with the inner wall of the wall, and the silencing component is arranged on the top of the main fan;

[0009] The silencer assembly includes a connecting piece and a straight tube silencer. A fan outlet top is provided on the top of the main fan. One end of the connecting piece is fixedly connected to the fan outlet top, and the other end is fixedly connected to the bottom of the straight tube silencer. A fixing frame is fixedly connected to the outside of the straight tube silencer near the bottom, and is fixedly connected to the top of the silencer room through the fixing frame. A hood connection port is also provided on the top of the straight tube silencer.

[0010] As an optimal technical solution of the utility model, a base plate is provided at the bottom of the main fan, and eight sets of shock absorbers are bolted to the bottom of the base plate. An air return hole is provided at the top plate of the soundproof room and directly above the main fan, and a heat dissipation outlet silencer is fixedly connected to the air return hole.

[0011] As a preferred technical solution of the utility model, a reducer is provided at the inlet end of the main fan, and the reducer is rolled with galvanized sheet with a thickness of 1.2 mm, matching the inlet size of the main fan, and is equipped with a flat iron flange. The number and size of the bolt holes on the flange match the relevant size of the main fan inlet.

[0012] As a preferred technical solution of the utility model, the reducer and reducer are fixed to the outlet of the main fan by bolts through a flat iron flange, and the other end is flexibly connected to a side wall connector and is concentrically opposite to the inner end of the side wall connector, with a gap of 100-150 mm, and the outside of the side wall connector is fixedly connected to the side panel of the soundproof room.

[0013] As a preferred technical solution of the utility model, a closed soundproof door is provided on the side of the wall of the soundproof room adjacent to the fan motor. The dimensions of the soundproof door are: 1800 mm high, 900 mm wide, and the thickness is equivalent to the wall, and a sealing strip is placed between the door and the door frame.

[0014] As a preferred technical solution of the utility model, the main frame of the soundproof room is welded with 5# angle steel, the wall is divided into three layers, the outer layer is 2 mm cold-rolled plate, which is fixed to the main frame by welding and the weld must be fully welded, and the middle layer is sound-absorbing material with a thickness of 100-150 mm.

[0015] As a preferred technical solution of the utility model, the inner layer of the main frame of the soundproof room is a soundproof board, which is punched from a 1.5 mm galvanized iron plate. The soundproof board can be installed by electric welding or bolting.

[0016] As a preferred technical solution of the utility model, the straight pipe silencer has a total length of 1430 mm and is composed of three parts, the middle part is the silencer section, and the two ends are transition sections. The silencer section is cylindrical in shape, 1050 mm in length, with an outer shell diameter of 1300 mm, rolled with 2.5 mm iron plate, with an inner hole diameter of 1050 mm, and the inner wall is covered with a 1.5 mm thick galvanized sheet.

[0017] As a preferred technical solution of the utility model, the shell and the silencer are filled with silencer material, and the two ends are sealed with 6 mm thick steel plates by electric welding. The steel plates are in the shape of a ring, with an outer diameter of 1400 mm and an inner hole diameter of 1100 mm. The transition section is in the shape of a truncated cone, rolled with a 6 mm steel plate, with a large section diameter of 1100 mm, which is welded to the steel plates at both ends of the silencer section, and a small section diameter of 900 mm, and an angle iron flange is welded, and the angle iron model is the national standard 5# angle steel.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the utility model provides a special silencing device for grain drying, which has the following beneficial effects:

[0020] This special silencer for grain drying places the entire main fan in a closed special room, and converts the noise into other energy through the silencer plate on the inner wall and the silencer material in the interlayer; at the same time, a silencer is installed at the outlet and return air hole of the main fan, and the noise generated by the fast-running air in the air duct is converted into other energy through the silencer plate on the inner wall of the straight-tube silencer and the silencer material in the interlayer, thereby playing a silencing function; in addition, shock absorbers and soft connections are used to control the vibration generated by the main fan during operation from the source so that it does not spread outward, reduce the noise caused by vibration, and comprehensively solve the noise problem of the fan through the above three aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a side view of the structure of the utility model;

[0023] Figure 3 This is a schematic diagram of the bottom structure of the main fan bottom plate of the utility model.

[0024] In the figure: 1. Silence room; 2. Main fan; 3. Shock absorber; 4. Fan outlet top and bottom; 5. Connectors; 6. Straight pipe silencer; 7. Hood connection port; 8. Heat dissipation outlet silencer; 9. Fixing bracket; 10. Reducer and reducer heads; 11. Side wall connector; 12. Soundproof door. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and 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, and therefore should not be understood as a limitation on the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1-3 A special silencing device for grain drying comprises a silencing room 1, a main fan 2 and a silencing component. The main fan 2 is located in the middle of the silencing room 1 and has a corresponding gap with the inner wall of the wall. A silencing component is arranged on the top of the main fan 2.

[0029] It should be noted that the main fan 2 is located in the middle of the anechoic room 1, and a corresponding gap is left between the main fan 2 and the inner wall to facilitate operators to install, debug, repair and maintain the equipment.

[0030] The silencer assembly includes a connector 5 and a straight tube silencer 6. A fan outlet top and bottom 4 is provided on the top of the main fan 2. One end of the connector 5 is fixedly connected to the fan outlet top and bottom 4, and the other end is fixedly connected to the bottom of the straight tube silencer 6. A fixing frame 9 is fixedly connected to the outside of the straight tube silencer 6 near the bottom, and is fixedly connected to the top of the silencer room 1 through the fixing frame 9. A hood connection port 7 is also provided on the top of the straight tube silencer 6.

[0031] In this embodiment, a bottom plate is provided at the bottom of the main fan 2, and eight sets of shock absorbers 3 are bolted to the bottom of the bottom plate. An air return hole is provided at the top plate of the soundproof room 1 and directly above the main fan 2, and a heat dissipation outlet silencer 8 is fixedly connected to the air return hole.

[0032] It should be noted that when the main fan 2 is running, a certain amount of heat will be generated, which cannot be dissipated in the closed anechoic room. When the heat accumulates to a certain value, the fan's own motor will be damaged due to overheating, and the main fan 2 bearing will also leak oil or be damaged due to overheating. Therefore, an air return hole must be set directly above the motor of the main fan 2 for heat dissipation and cooling.

[0033] In this embodiment, a reducer 10 is provided at the inlet end of the main fan 2. The reducer 10 is rolled with galvanized sheet with a thickness of 1.2 mm, matching the inlet size of the main fan 2, and is equipped with a flat iron flange. The number and size of the bolt holes on the flange match the relevant inlet size of the main fan 2.

[0034] In this embodiment, the reducer 10 is fixed to the outlet of the main fan 2 by bolts through a flat iron flange, and the other end is flexibly connected to the side wall connector 11, and is concentrically opposite to the inner end of the side wall connector 11, with a gap between 100-150 mm, and the outside of the side wall connector 11 is fixedly connected to the side panel of the soundproof room 1.

[0035] It should be noted that the flexible connection is made of canvas with a wire ring inside to increase its durability and use effect. The diameter of the round mouth of the flexible connection is slightly larger than the diameter of the metal pipe mouth, the docking size is about 50 mm, and it is fixed with a clamp of corresponding size.

[0036] In this embodiment, a closed soundproof door 12 is provided on the side of the wall of the soundproof room 1 adjacent to the fan motor. The dimensions of the soundproof door 12 are: 1800 mm high, 900 mm wide, and the thickness is equivalent to the wall. A sealing strip is placed between the door and the door frame.

[0037] It should be noted that a sealing strip must be placed between the door and the door frame to avoid gaps and sound leakage.

[0038] In this embodiment, the main frame of the soundproof room 1 is welded with 5# angle steel, and the wall is divided into three layers. The outer layer is 2 mm cold-rolled plate, which is fixed to the main frame by welding and the weld must be fully welded. The middle layer is sound-absorbing material with a thickness of 100-150 mm.

[0039] It should be noted that the outer layer is used to protect all items in the soundproof room 1 from adverse factors such as rain, sunlight, wind erosion and dust, thereby increasing the comprehensive service life of the equipment and also having a certain sound insulation effect. The main function of the middle layer is to evenly transfer the noise generated by the fan during operation to the soundproof cotton through the soundproof holes in the inner layer, and the soundproof cotton converts its energy to achieve a soundproofing effect.

[0040] In this embodiment, the inner layer of the main frame of the soundproof room 1 is a soundproof board, which is punched from a 1.5 mm thick galvanized iron plate. The soundproof board can be installed by electric welding or bolting.

[0041] In this embodiment, the straight pipe muffler 6 has a total length of 1430 mm and is composed of three parts, the middle part is the muffler section, and the two ends are transition sections. The muffler section is cylindrical in shape, 1050 mm long, with a shell diameter of 1300 mm, rolled with 2.5 mm iron plate, with an inner hole diameter of 1050 mm, and the inner wall is covered with a 1.5 mm thick galvanized sheet.

[0042] In this embodiment, the shell and the silencer are filled with silencer material, and the two ends are sealed with 6 mm thick steel plates by electric welding. The steel plates are in the shape of a ring, with an outer diameter of 1400 mm and an inner hole diameter of 1100 mm. The transition section is in the shape of a truncated cone, rolled with a 6 mm steel plate, with a large section diameter of 1100 mm, which is welded to the steel plates at both ends of the silencer section, and a small section diameter of 900 mm, and an angle iron flange is welded, and the angle iron model is the national standard 5# angle steel.

[0043] Beneficial effects:

[0044] The special silencer equipment for grain drying places the entire main fan 2 in a closed special room, and converts the noise into other energy through the silencer plate on the inner wall and the silencer material in the interlayer; at the same time, a silencer is installed at the outlet and the return air hole of the main fan 2 respectively, and the noise generated by the fast-running air in the air duct is converted into other energy through the silencer plate on the inner wall of the straight tube silencer 6 and the silencer material in the interlayer to play a silencer function; in addition, the shock absorber 3 and the soft connection are used to control the vibration generated by the main fan 2 during operation from the source so that it does not spread outward, reduce the noise generated by the vibration, and comprehensively solve the noise problem of the fan through the above three aspects.

[0045] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A special silencing device for grain drying, comprising a silencing room (1), a main fan (2) and a silencing component, wherein the main fan (2) is located in the middle of the silencing room (1) and has a corresponding gap with the inner wall of the wall, and the silencing component is arranged on the top of the main fan (2); Features: The silencer assembly comprises a connecting piece (5) and a straight tube silencer (6); a fan outlet top (4) is arranged at the top of the main fan (2); one end of the connecting piece (5) is fixedly connected to the fan outlet top (4), and the other end is fixedly connected to the bottom of the straight tube silencer (6); a fixing frame (9) is fixedly connected to the outside of the straight tube silencer (6) near the bottom, and is fixedly connected to the top of the silencer room (1) through the fixing frame (9); and a hood connection port (7) is also arranged at the top of the straight tube silencer (6).

2. A special grain drying silencing equipment according to claim 1, characterized in that: A bottom plate is provided at the bottom of the main fan (2), and eight sets of shock absorbers (3) are bolted to the bottom of the bottom plate. An air return hole is provided at the top plate of the soundproof room (1) and directly above the main fan (2), and a heat dissipation outlet silencer (8) is fixedly connected to the air return hole.

3. A special grain drying silencing equipment according to claim 1, characterized in that: The inlet end of the main fan (2) is provided with a reducer (10), the reducer (10) is rolled with a galvanized sheet with a thickness of 1.2 mm, matches the inlet size of the main fan (2), and is equipped with a flat iron flange, the number and size of the bolt holes on the flange match the relevant size of the inlet of the main fan (2).

4. A special grain drying silencing equipment according to claim 3, characterized in that: The reducer (10) is fixed to the outlet of the main fan (2) by bolts through a flat iron flange, and the other end is flexibly connected to a side wall connector (11) and is concentrically opposite to the inner end of the side wall connector (11) with a gap of 100-150 mm. The outside of the side wall connector (11) is fixedly connected to the side panel of the soundproof room (1).

5. The special silencing equipment for grain drying according to claim 1 is characterized in that: A closed soundproof door (12) is arranged on one side of the wall of the soundproof room (1) adjacent to the fan motor. The dimensions of the soundproof door (12) are: 1800 mm in height, 900 mm in width, and a thickness equivalent to that of the wall. A sealing strip is placed between the door and the door frame.

6. The special silencing equipment for grain drying according to claim 1 is characterized in that: The main frame of the anechoic room (1) is welded with 5# angle steel, and the wall is divided into three layers. The outer layer is a 2 mm cold-rolled plate, which is fixed to the main frame by welding and the weld must be fully welded. The middle layer is a sound-absorbing material with a thickness of 100-150 mm.

7. A special grain drying silencing equipment according to claim 6, characterized in that: The inner layer of the main frame of the soundproof room (1) is a soundproof board, which is punched out of a 1.5 mm thick galvanized iron plate. The soundproof board can be installed by electric welding or bolt fixing.

8. The special silencing equipment for grain drying according to claim 1 is characterized by: The straight tube silencer (6) has a total length of 1430 mm and is composed of three parts, the middle part is a silencer section, and the two ends are transition sections; the silencer section is cylindrical in shape, has a length of 1050 mm, an outer shell diameter of 1300 mm, is rolled with a 2.5 mm iron plate, has an inner hole diameter of 1050 mm, and the inner wall is covered with a 1.5 mm thick galvanized sheet.

9. A special grain drying silencing equipment according to claim 8, characterized in that: The outer shell and the silencer plate are filled with silencer material, and 6 mm thick steel plates are welded at both ends. The steel plate is in the shape of a circular ring with an outer diameter of 1400 mm and an inner hole diameter of 1100 mm. The transition section is in the shape of a truncated cone and is rolled with 6 mm steel plates. The large section has a diameter of 1100 mm and is welded to the steel plates at both ends of the silencer section. The small section has a diameter of 900 mm and is welded with an angle iron flange. The angle iron model is the national standard 5# angle steel.

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