CN221647175U - A silo-muffler device for Roots blower on top of warehouse - Google Patents

Abstract

The utility model discloses a silencing device for a Roots blower on a warehouse top, and relates to the technical field of Roots blowers. The utility model comprises a noise reduction box and a blower body, wherein a second silencer assembly is fixedly arranged between the lower surface of the blower body and the inner surface of the noise reduction box. The utility model can first put a limit plate on the inner surface of one of the semicircular shells into a limit groove, and then put a limit plate on the inner surface of the other semicircular shell into another limit groove from below, and can make the plug block enter the interior of a hollow rectangular block by pressing the plug block inwardly, and then make the hollow rectangular block enter the interior of a hollow connecting block, and the plug block is inserted into the jack under the influence of a first spring force, so that the semicircular shell is connected to the outside of an air duct, and noise reduction can be carried out by using a sound-absorbing cotton pad. After the sound-absorbing cotton pad has been used for a period of time, the inner sound-absorbing cotton pad can be replaced after the semicircular baffle is removed by rotating a screw, and noise can be reduced when airflow flows.

Description

A silo-muffler device for Roots blower on top of warehouse

Technical Field

The utility model relates to the technical field of Roots blowers, in particular to a silo top Roots blower silencer.

Background Art

Roots blower is a type of positive displacement blower. It has two three-blade impellers that rotate relative to each other in a space sealed by a casing and a wall panel. Since each impeller adopts an involute or an envelope of an epicycloid, the three blades of each impeller are exactly the same, and the two impellers are also exactly the same, which greatly reduces the difficulty of processing. CNC equipment is used during the processing of the impellers to ensure that the two impellers can maintain a certain minimum gap no matter where they rotate to when the center distance remains unchanged, thereby ensuring that gas leakage is within the allowable range.

The utility model patent with application publication number CN210738818U discloses a muffler for Roots blower, including a telescopic tube, wherein collars are symmetrically installed at the left and right ends of the telescopic tube, an airbag ring is fixedly installed inside the collar, a connecting tube in communication with the airbag ring is fixedly installed on the surface of the collar, an airbag is fixedly installed on the other end of the connecting tube, liquid pipes are symmetrically fixed on the upper and lower sides of the collar, a conduit is connected between the liquid pipe and the telescopic tube, a through hole in communication with the conduit is opened on the side wall of the liquid pipe, an end cap is installed at the outer end of the liquid pipe, and a sliding rod is installed in the middle of the end cap. The utility model has a simple structure and a reasonable design. It uses the method of passing water to the surface of the air inlet pipe and the air outlet pipe of the Roots blower, and uses water to wrap the air inlet pipe and the air outlet pipe, thereby facilitating noise reduction and improving the noise reduction effect of the Roots blower. It meets social needs and is worthy of promotion in the field of Roots blowers.

However, the above device still has some shortcomings in actual use: the continuous vibration of the fan is likely to produce loud noise, and it is impossible to provide flow blocking and noise reduction protection for the air inlet and outlet. The high-speed flow of the airflow also produces loud noise, which has certain limitations and reduces the practicality of the silencer. Moreover, when the fan is in use, it will produce moving vibrations during operation, which will also cause certain noise. In response to the above problems, the inventor proposes a silencer device for the Roots blower on the top of the warehouse to solve the above problems.

Utility Model Content

In order to solve the problem that the continuous vibration of the fan easily generates loud noise, and the air inlet and outlet cannot be protected from flow obstruction and silencer, the high-speed flow of air also produces loud noise, which has certain limitations and reduces the practicality of the silencer. Moreover, when the fan is in use, it will produce moving vibration when working, which will also cause certain noise problems. The purpose of the utility model is to provide a silencer for the Roots blower on the top of the warehouse.

In order to solve the above technical problems, the utility model adopts the following technical solutions: a silencing device for a Roots blower on a top of a warehouse, comprising a noise reduction box and a blower body, a second silencer assembly is fixedly arranged between the lower surface of the blower body and the inner surface of the noise reduction box, a bellows is arranged at the air inlet and the air outlet of the blower body, an air duct is arranged on the side of the noise reduction box, and a first silencer assembly is connected to the air duct;

The first silencer assembly includes a semicircular shell, an inner surface of the semicircular shell is movably inserted with a sound-absorbing cotton pad, a side of the semicircular shell is detachably provided with a semicircular baffle, a side of the semicircular baffle is threadedly inserted with a screw, an end of the screw is threadedly inserted in the interior of the semicircular shell, a limit plate is fixedly provided on the inner surface of the semicircular shell, a limit groove is provided on the outer surface of the air duct, and the limit plate is movably fitted with the inner surface of the limit groove, a fixing plate is fixedly provided on the outer surface of one of the semicircular shells, a hollow rectangular block is fixedly provided on the lower surface of the fixing plate, the cross-sectional shape of the hollow rectangular block is the same as the inner surface shape of the hollow connecting block, and the cross-sectional shape of the hollow rectangular block is "convex", a first spring is fixedly provided on the inner surface of the hollow rectangular block, and an insert block is fixedly provided on the other end of the first spring, and a hollow connecting block is fixedly provided on the side of the other semicircular shell, the hollow rectangular block is movably fitted with the inner surface of the hollow connecting block, and a socket is provided on the side of the hollow connecting block, and the insert block can be movably inserted in the socket.

Preferably, the second silencer assembly includes a hollow shell, which is fixedly connected to the inner surface of the noise reduction box, and hydraulic oil is fixedly arranged inside the hollow shell. A movable rod is movably inserted into the hollow shell, and there are several hollow shells, and the hollow shells are arrayed on the inner surface of the noise reduction box. A slide plate is fixedly arranged at the lower end of the movable rod, and the slide plate is slidably fitted with the inner surface of the hollow shell. A through hole is opened on the slide plate, and there are several through holes, and the through hole array is distributed on the upper surface of the slide plate. A top block is fixedly arranged on the upper end of the movable rod, and the upper surface of the top block is fixedly connected to the lower surface of the fan body. A sealing sleeve is fixedly arranged on the upper surface of the hollow shell, and the inner surface of the sealing sleeve is slidably fitted with the outer surface of the movable rod.

Compared with the prior art, the beneficial effects of the present invention are:

1. The utility model can first put the limiting plate on the inner surface of one of the semicircular shells into the limiting groove, and then put the limiting plate on the inner surface of the other semicircular shell into the other limiting groove. The plug block can be pressed inward to enter the interior of the hollow rectangular block, and then the hollow rectangular block can be inserted into the interior of the hollow connecting block. Under the influence of the first spring force, the plug block is inserted into the jack, so that the semicircular shell is connected to the outside of the air duct. Noise can be reduced by the sound-absorbing cotton pad. After the sound-absorbing cotton pad has been used for a period of time, the semicircular baffle can be removed by rotating the screw, and the internal sound-absorbing cotton pad can be replaced, so that noise can be reduced when the airflow flows;

2. The vibration generated by the fan body when the utility model is working will cause the movable rod to move downward, the slide plate slides along the inner wall of the hollow shell, and the hydraulic oil flows along the through hole. The hydraulic oil has extremely small compressibility and can quickly convert this energy into hydraulic compression energy to achieve vibration reduction, damping and buffering effects. The shock-absorbing spring is compressed under force, which can reduce the vibration generated by the fan body during operation, thereby reducing the noise generated during operation.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

Fig. 1 is a schematic diagram of the structure of the utility model.

FIG2 is a schematic diagram of the cross-sectional structure of the noise reduction box of the utility model.

FIG3 is a schematic diagram of the structure of the first muffler assembly of the present invention.

FIG4 is an enlarged structural schematic diagram of point A in FIG3 of the present invention.

FIG. 5 is a schematic diagram of the structure of the second muffler assembly of the present invention.

FIG6 is an enlarged structural schematic diagram of point B in FIG5 of the present invention.

In the figure: 1. noise reduction box; 11. air duct; 2. fan body; 21. bellows; 3. first silencer assembly; 31. semicircular shell; 32. sound-absorbing cotton pad; 33. semicircular baffle; 331. screw; 34. limit plate; 341. limit groove; 35. fixing plate; 36. hollow rectangular block; 37. first spring; 38. plug block; 39. hollow connecting block; 391. jack; 4. second silencer assembly; 41. hollow shell; 42. movable rod; 43. slide plate; 44. through hole; 45. shock-absorbing spring; 46. top block; 47. sealing sleeve.

DETAILED DESCRIPTION

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.

Embodiment 1: As shown in FIGS. 1-6 , the utility model provides a silencing device for a Roots blower on a top of a warehouse, comprising a noise reduction box 1 and a blower body 2, a second silencing assembly 4 is fixedly provided between the lower surface of the blower body 2 and the inner surface of the noise reduction box 1, a box door is rotatably provided on the noise reduction box 1, a bellows 21 is provided at the air inlet end and the air outlet end of the blower body 2, two air ducts 11 are provided, one is an air inlet duct, and the other is an air outlet duct, the bellows 21 is connected to the air duct 11, the bellows 21 and the side of the noise reduction box 1 are provided with the air duct 11, and the air duct 11 is connected to the first silencing assembly 3;

The first muffler assembly 3 includes a semicircular shell 31, the inner surface of which is movably inserted with a sound-absorbing cotton pad 32, a semicircular baffle 33 is detachably provided on the side of the semicircular shell 31, a limiting plate 34 is fixedly provided on the inner surface of the semicircular shell 31, a limiting groove 341 is provided on the outer surface of the air duct 11, and the limiting plate 34 is movably fitted with the inner surface of the limiting groove 341, a fixing plate 35 is fixedly provided on the outer surface of one of the semicircular shells 31, a hollow rectangular block 36 is fixedly provided on the lower surface of the fixing plate 35, a first spring 37 is fixedly provided on the inner surface of the hollow rectangular block 36, an insert block 38 is fixedly provided on the other end of the first spring 37, a hollow connecting block 39 is fixedly provided on the side of the other semicircular shell 31, the hollow rectangular block 36 is movably fitted with the inner surface of the hollow connecting block 39, and a The plug block 38 can be movably inserted into the socket 391. The limiting plate 34 on the inner surface of one of the semicircular shells 31 can be placed into the limiting groove 341 first, and then the limiting plate 34 on the inner surface of the other semicircular shell 31 can be placed into the other limiting groove 341. The plug block 38 can be pressed inward to make it enter the interior of the hollow rectangular block 36, and then the hollow rectangular block 36 can enter the interior of the hollow connecting block 39. Under the influence of the force of the first spring 37, the plug block 38 is inserted into the socket 391, so that the semicircular shell 31 is connected to the outside of the air duct 11, and noise reduction can be performed by the sound-absorbing cotton pad 32. After the sound-absorbing cotton pad 32 has been used for a period of time, the semicircular baffle 33 can be removed by rotating the screw 331, and the internal sound-absorbing cotton pad 32 can be replaced, so that noise can be reduced when air flows.

A screw rod 331 is threadedly inserted into the side surface of the semicircular baffle 33 , and an end portion of the screw rod 331 is threadedly inserted into the interior of the semicircular housing 31 .

By adopting the above technical solution, it is convenient to disassemble and assemble the semicircular baffle 33.

The cross-sectional shape of the hollow rectangular block 36 is the same as the inner surface shape of the hollow connecting block 39 , and the cross-sectional shape of the hollow rectangular block 36 is a “convex” shape.

By adopting the above technical solution, it is convenient to connect the two semicircular shells 31 together.

There are a plurality of hollow shells 41 , and the hollow shells 41 are distributed in an array on the inner surface of the noise reduction box 1 .

By adopting the above technical solution, the shock absorption effect is improved.

A plurality of through holes 44 are provided, and the through holes 44 are distributed in an array on the upper surface of the slide plate 43 .

By adopting the above technical solution, the flow of hydraulic oil is facilitated.

Embodiment 2: As shown in FIGS. 1 , 5 and 6 , the second silencer assembly 4 comprises a hollow shell 41, which is fixedly connected to the inner surface of the noise reduction box 1, and hydraulic oil is fixedly arranged inside the hollow shell 41. A movable rod 42 is movably inserted on the hollow shell 41, and a slide plate 43 is fixedly arranged at the lower end of the movable rod 42. The slide plate 43 slides and fits with the inner surface of the hollow shell 41, and a through hole 44 is provided on the slide plate 43. A top block 46 is fixedly arranged at the upper end of the movable rod 42, and the upper surface of the top block 46 is fixedly connected to the lower surface of the fan body 2. The upper surface of the hollow shell 41 is fixedly arranged. A sealing sleeve 47 is provided, and the inner surface of the sealing sleeve 47 slides and fits with the outer surface of the movable rod 42 to avoid oil leakage. The vibration generated when the fan body 2 is working will cause the movable rod 42 to move downward, and the slide plate 43 slides along the inner wall of the hollow shell 41. The hydraulic oil flows along the through hole 44. The hydraulic oil has extremely small compressibility and can quickly convert this energy into hydraulic compression energy to achieve the effects of vibration reduction, damping and buffering. The shock-absorbing spring 45 is compressed under force, which can reduce the vibration generated by the fan body 2 during operation, thereby reducing the noise generated during operation.

Working principle: When the utility model is in use, the limiting plate 34 on the inner surface of one of the semicircular shells 31 can be placed into the limiting groove 341 first, and then the limiting plate 34 on the inner surface of the other semicircular shell 31 can be placed into the other limiting groove 341 below, and the plug block 38 can be pressed inward to make it enter the interior of the hollow rectangular block 36, and then the hollow rectangular block 36 can enter the interior of the hollow connecting block 39, and the plug block 38 is inserted into the jack 391 under the influence of the force of the first spring 37, so that the semicircular shell 31 is connected to the outside of the air duct 11, and noise reduction can be performed through the sound-absorbing cotton pad 32. After the cotton pad 32 has been used for a period of time, the semicircular baffle 33 can be removed by rotating the screw 331, and the internal sound-absorbing cotton pad 32 can be replaced. This can reduce noise when the airflow flows. The vibration generated when the fan body 2 is working will cause the movable rod 42 to move downward, and the slide plate 43 slides along the inner wall of the hollow shell 41. The hydraulic oil flows along the through hole 44. The hydraulic oil has extremely low compressibility and can quickly convert this energy into hydraulic compression energy to achieve vibration reduction, damping and buffering. The shock-absorbing spring 45 is compressed under force, which can reduce the vibration generated by the fan body 2 during operation, thereby reducing the noise generated during operation.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (8)

1. The utility model provides a storehouse top roots fan noise eliminator, includes box (1) and fan body (2) of making an uproar, its characterized in that: a second silencing component (4) is fixedly arranged between the lower surface of the fan body (2) and the inner surface of the noise reduction box body (1), corrugated pipes (21) are respectively arranged at the air inlet end and the air outlet end of the fan body (2), an air pipe (11) is arranged on the side surface of the noise reduction box body (1), and a first silencing component (3) is connected to the air pipe (11);

the first noise elimination subassembly (3) is including semicircle casing (31), the internal surface activity of semicircle casing (31) is inserted and is equipped with and inhale sound cotton pad (32), the side of semicircle casing (31) can be dismantled and be equipped with semicircle baffle (33), the internal surface fixation of semicircle casing (31) is equipped with limiting plate (34), spacing groove (341) have been seted up to the outside surface of tuber pipe (11), limiting plate (34) are laminated with the internal surface activity of spacing groove (341), one of them the outside fixed surface of semicircle casing (31) is equipped with fixed plate (35), the lower fixed surface of fixed plate (35) is equipped with hollow rectangle piece (36), the fixed internal surface of hollow rectangle piece (36) is equipped with first spring (37), the other end of first spring (37) is fixed and is equipped with subrack (38), and the other side of semicircle casing (31) is fixed and is equipped with hollow connecting block (39), jack (391) have been seted up in the internal surface activity laminating of hollow rectangle piece (36) and hollow connecting block (39), jack (391) can be inserted in activity jack (391).

2. The base top Roots blower muffler device as claimed in claim 1, wherein the second muffler component (4) comprises a hollow shell (41), the hollow shell (41) is fixedly connected to the inner surface of the noise reduction box body (1), hydraulic oil is fixedly arranged in the hollow shell (41), a movable rod (42) is movably inserted in the hollow shell (41), a sliding plate (43) is fixedly arranged at the lower end of the movable rod (42), the sliding plate (43) is in sliding fit with the inner surface of the hollow shell (41), a through hole (44) is formed in the sliding plate (43), a top block (46) is fixedly arranged at the upper end of the movable rod (42), and the upper surface of the top block (46) is fixedly connected with the lower surface of the blower body (2).

3. The silencing device for the top Roots blower according to claim 1, wherein a screw (331) is inserted into a side thread of the semicircular baffle (33), and an end thread of the screw (331) is inserted into the semicircular shell (31).

4. A top-house Roots blower muffler device as claimed in claim 1, wherein the hollow rectangular block (36) has a cross-sectional shape identical to the shape of the inner surface of the hollow connection block (39).

5. A roof roots blower muffler device as set forth in claim 1 wherein said hollow rectangular block (36) is "convex" in cross-sectional shape.

6. The garage top Roots blower muffler device as set forth in claim 2, wherein the number of hollow shells (41) is plural, and the array of hollow shells (41) is distributed on the inner surface of the noise reduction box body (1).

7. The silencing device for the roof Roots blower according to claim 2, wherein a plurality of through holes (44) are formed, and the through holes (44) are distributed on the upper surface of the sliding plate (43) in an array.

8. The silencing device for the top Roots blower as claimed in claim 2, wherein a sealing sleeve (47) is fixedly arranged on the upper surface of the hollow shell (41), and the inner surface of the sealing sleeve (47) is in sliding fit with the outer side surface of the movable rod (42).