CN213533166U

CN213533166U - Concrete mixer of low noise

Info

Publication number: CN213533166U
Application number: CN202021994347.XU
Authority: CN
Inventors: 陈志鹏; 张振礼; 卢振华; 董福明
Original assignee: Beijing Urban Construction No9 Concrete Co ltd
Current assignee: Beijing Urban Construction No9 Concrete Co ltd
Priority date: 2020-09-12
Filing date: 2020-09-12
Publication date: 2021-06-25
Anticipated expiration: 2030-09-12

Abstract

The application relates to a low-noise concrete mixer, which comprises a mixer body, a mixing mechanism and a motor, wherein the mixing mechanism is positioned in the mixer body and used for mixing concrete, the motor is used for providing driving force for the mixing mechanism, and the motor is arranged on the outer side of the mixer body; be provided with the fuselage puigging on the stirring fuselage outer wall, the fuselage puigging includes sound insulation pad and a plurality of sound insulating strip, and the sound insulation pad cladding is in the stirring fuselage outside, and sound insulating strip sets up on sound insulation pad, and sound insulating strip is the sound insulating strip of inhaling the sound material. When the noise generated in the stirring machine body is transmitted outwards, the noise passes through the sound insulation layer and the sound insulation strips and is weakened twice by the sound insulation layer and the sound insulation strips; when noise is incident to the surface of the sound insulation strip, air vibration in the sound absorption material micropores can be caused, and under the action of viscosity resistance and frictional resistance of air, a part of sound wave energy can be converted into heat energy, so that the sound absorption effect is achieved, and the transmission of noise generated by the stirring machine body is effectively reduced. This application has the less effect of noise.

Description

Concrete mixer of low noise

Technical Field

The application relates to the field of concrete mixers, in particular to a low-noise concrete mixer.

Background

Concrete is one of the most common and widely used building materials on earth, being strong and durable, easy to use, low in manufacturing cost, and capable of being manufactured into any shape. The concrete is an artificial stone which is prepared by mixing coarse aggregate, fine aggregate, water and cement according to a certain proportion, uniformly stirring, pouring, forming and hardening.

Concrete is generally conveyed to a construction site after being stirred by a concrete mixer in a concrete mixing plant; because the demand of concrete is great among the building engineering, general concrete mixing plant generally can use many concrete mixer to stir work simultaneously. When the concrete mixer works, a large amount of noise is generated among mixing materials, and the impact between the mixing materials and the mixing drum; in practical production, each concrete mixer generates more than 90dB of noise when working.

The person is under the high noise environment for a long time, can appear tinnitus, hearing decline, can appear symptoms such as headache even, even leave the noise environment, also can cause irreversible damage to hearing. A large amount of noise generated by the concrete mixer can affect the hearing of workers, and the working efficiency is reduced after the noise is used for a long time.

In view of the above-mentioned related art, the inventors consider that the concrete mixer has a drawback of loud noise.

SUMMERY OF THE UTILITY MODEL

In order to reduce the noise that concrete mixer produced, the application provides a concrete mixer of low noise.

The application provides a concrete mixer of low noise adopts following technical scheme:

a low-noise concrete mixer comprises a mixer body, a mixing mechanism which is positioned in the mixer body and used for mixing concrete, and a motor which provides driving force for the mixing mechanism, wherein the motor is arranged outside the mixer body; be provided with the fuselage puigging on the stirring fuselage outer wall, the fuselage puigging includes sound insulation pad and a plurality of sound insulating strip, and the sound insulation pad cladding is in the stirring fuselage outside, and the sound insulating strip sets up on sound insulation pad side by side, and the sound insulating strip is for inhaling the sound insulating strip of sound material.

By adopting the technical scheme, when the noise generated in the stirring machine body is transmitted outwards, the noise passes through the sound insulation layer and the sound insulation strips and is weakened twice by the sound insulation layer and the sound insulation strips; when noise is incident to the surface of the sound insulation strip, air vibration in the micropores of the sound absorption material can be caused, and under the action of the viscosity resistance and the friction resistance of air, a part of sound wave energy can be converted into heat energy, so that the sound absorption effect is achieved, and the friction between coarse aggregate and fine aggregate in the mixing drum and the transmission of noise generated by the friction between the mixing raw material and the inner wall of the mixing drum are effectively reduced.

Optionally, the sound insulating strips are cylindrical.

Through adopting above-mentioned technical scheme, there is the clearance between the sound insulating strip of cylinder structure, makes the sound wave can carry out multiple reflection between sound insulating strip, and sound insulating strip also can carry out multiple absorption to the sound wave, makes sound absorbing effect better.

Optionally, the sound insulating strips are hollow structures.

Through adopting above-mentioned technical scheme, the sound insulating strip is hollow structure, makes the sound wave multiple reflection in sound insulating strip hollow structure, and the sound wave also can be absorbed many times, further reduces the propagation of the noise that produces in the stirring fuselage to further reduce concrete mixer's noise.

Optionally, give sound insulation and fill up including inlayer sound insulation pad and outer sound insulation pad, outer sound insulation pad cladding is in the inlayer sound insulation pad outside, and the sound insulation strip is arranged between inlayer sound insulation pad and outer sound insulation pad.

Through adopting above-mentioned technical scheme, the sound wave can be weakened by inlayer sound insulation pad, sound insulation strip and outer sound insulation pad in proper order when propagating outward to the stirring fuselage, makes noise reduction better.

Optionally, the inlayer gives sound insulation and fills up for having microporous construction's the sound pad of inhaling the sound material, and the skin gives sound insulation and fills up for giving sound insulation the sound pad of material.

By adopting the technical scheme, when sound waves are transmitted to the outside of the stirring machine body, the sound waves are absorbed by the inner-layer sound-insulating pad made of the sound-absorbing material firstly and then absorbed by the sound-insulating strips; and finally, for the outer-layer sound insulation pad, because the density of the sound insulation material is high, the residual sound wave energy is low, and the sound insulation material is difficult to penetrate through, so that the sound insulation effect is achieved.

Optionally, the lower side of the stirring machine body is provided with a machine body damping base with a buffering effect.

By adopting the technical scheme, the vibration of the concrete mixer during operation can be effectively reduced by the damping base of the machine body, so that the noise generated by vibration is reduced fundamentally; fuselage vibration damping mount can also play the cushioning effect between stirring fuselage and ground, reduces the propagation that the noise in the stirring fuselage passes through the ground medium.

Optionally, the damping base of the machine body comprises an elastic damping plate, a reed, a bottom plate and a limiting frame, the elastic damping plate is arranged on the upper side of the bottom plate, the elastic damping plate corresponds to the bottom plate in vertical position, the section of the reed in the vertical direction is wavy, and the reed is arranged between the elastic damping plate and the bottom plate; the limiting frame is arranged around the bottom plate in a surrounding mode, and the upper edge of the limiting frame is higher than the bottom surface of the elastic damping plate.

By adopting the technical scheme, when the stirring machine body vibrates, the elastic damping plate is subjected to pressure to generate elastic deformation and transmits the vibration to the reed, the reed converts longitudinal vibration into elastic deformation and disperses the vibration to the horizontal direction, so that the vibration of the stirring machine body is reduced, and the noise generated by the vibration of the stirring machine body is weakened fundamentally; the limiting plate can reduce the vibrations of fuselage vibration damping mount horizontal direction, makes the fixed of stirring fuselage more stable.

Optionally, fuselage vibration damping mount still includes the backup pad, and the reed includes upper reed and lower floor's reed, and the backup pad sets up between upper reed and lower floor's reed.

Through adopting above-mentioned technical scheme, when the stirring fuselage produced the vibration, the elasticity shock attenuation board received pressure and produced elastic deformation to with vibration conduction to upper reed, upper reed converts fore-and-aft vibrations into elastic deformation, will shake to the horizontal direction dispersion, thereby alleviate the vibrations of stirring fuselage, vibrations are propagated to lower floor's reed through the backup pad, the vertical direction dispersion is followed with vibrations again to lower floor's reed, further alleviates the vibrations of stirring fuselage, thereby further weaken the noise that the vibrations of stirring fuselage produced.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the noise insulation layer of the mixer body is arranged to absorb noise generated in the mixer body, so that the noise of the concrete mixer is reduced;

2. through setting up fuselage vibration damping mount, alleviate the vibrations of stirring fuselage, the noise that produces when weakening the vibrations of stirring fuselage from the root cause still reduces the noise of stirring fuselage and passes through the propagation of ground medium, further reduces concrete mixer's noise.

Drawings

FIG. 1 is a schematic perspective view of a low noise concrete mixer;

FIG. 2 is a schematic perspective view of a sound barrier layer of a concrete mixer body showing low noise;

FIG. 3 is a cross-sectional view of a low noise concrete mixer.

Description of reference numerals: 1. a stirring machine body; 11. a mixing drum; 12. a feed hopper; 13. a discharge pipe; 14. a fuselage sound insulation layer; 141. a sound insulating strip; 142. an inner sound insulation pad; 143. an outer sound insulation pad; 15. a damping base of the machine body; 151. an elastic damping plate; 152. an upper reed; 153. a support plate; 154. a lower layer reed; 155. a base plate; 156. a limiting frame; 2. a stirring mechanism; 21. a rotating shaft; 22. A stirring blade; 23. a blade fixing rod; 3. an electric motor.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses concrete mixer of low noise. Referring to fig. 1 and 2, the low-noise concrete mixer includes a mixer body 1, a mixing mechanism 2 located in the mixer body 1 for mixing concrete, and a motor 3 for providing a driving force for the mixing mechanism 2, wherein the motor 3 is fixed at the outer side of the mixer body 1; a feed hopper 12 matched with a valve is arranged on the upper side of the stirring machine body 1, and a feed inlet is correspondingly formed at the joint of the stirring machine body 1 and the feed hopper 12; a discharge pipe 13 is arranged on the lower side of the side wall of the stirring machine body 1, and a discharge port is correspondingly arranged at the joint of the stirring machine body 1 and the discharge pipe 13.

The outside of the stirring machine body 1 is also provided with a machine body sound insulation layer 14, the machine body sound insulation layer 14 comprises sound insulation strips 141, an inner layer sound insulation pad 142 and an outer layer sound insulation pad 143, the inner layer sound insulation pad 142 is fixed on the side wall and the top surface of the stirring machine body 1, the outer layer sound insulation pad 143 is fixed on the outside of the stirring machine body 1, and the sound insulation strips 141 are transversely arranged between the inner layer sound insulation pad 142 and the outer layer sound insulation pad 143 corresponding to the side wall of the stirring machine body 1; the sound insulating strip 141 is generally a cylindrical structure, and can also be other cylindrical structures, and the sound insulating strip 141 is generally a hollow structure, and can also be a solid structure; the sound insulating strip 141 may be made of fiber, or may be made of other materials with good sound absorbing performance, such as sponge; the inner sound insulating pad 142 is generally made of a sound absorbing material having a small thickness such as a sound insulating felt or a fiber board, and the outer sound insulating pad 143 may be made of a sound insulating material having a large hardness and density such as a sound insulating board or a sound absorbing brick. When sound waves are incident to the surface of the sound-absorbing material, air in micropores of the sound-absorbing material can vibrate, and a part of sound wave energy can be converted into heat energy under the action of viscous resistance and frictional resistance of the air, so that the sound-absorbing effect is achieved; when the sound waves are transmitted to the outside of the stirring machine body 1, the sound waves are firstly absorbed by the inner-layer sound insulation pad 142 made of sound-absorbing materials and then absorbed by the sound insulation strips 141, and meanwhile, the sound insulation strips 141 are of hollow structures, so that the sound waves are reflected for multiple times in the middle of the sound insulation strips 141 and are also absorbed for multiple times, and the transmission of noise in the stirring machine body 1 is further reduced; finally, the outer sound insulation pad 143 is hard to penetrate sound waves due to its high density, thereby achieving the sound insulation effect.

The lower side of the stirring machine body 1 is also provided with a machine body damping base 15, and the stirring machine body 1 is fixed on the machine body damping base 15. Referring to fig. 2 and 3, the fuselage shock mount 15 includes an elastic shock-absorbing plate 151, an upper spring 152, a support plate 153, a lower spring 154, a bottom plate 155 and a limit frame 156; the cross sections of the upper reed 152 and the lower reed 154 are both wavy, the wave crest and the wave trough of the upper reed 152 are fixedly connected with the elastic damping plate 151 and the supporting plate 153 respectively, and the wave crest and the wave trough of the lower reed 154 are fixedly connected with the supporting plate 153 and the bottom plate 155 respectively. When stirring fuselage 1 produced the vibration, elasticity shock attenuation board 151 received pressure and produced elastic deformation to conduct the vibration to upper reed 152, upper reed 152 converts fore-and-aft vibrations into elastic deformation, disperses vibrations to the horizontal direction, and then alleviates stirring fuselage 1's vibrations, vibrations process backup pad 153 and propagate to lower floor's reed 154, and lower floor's reed 154 will shake again and disperse along the vertical direction, further alleviates stirring fuselage 1's vibrations. The elastic damping plate 151, the supporting plate 153 and the bottom plate 155 are consistent in size and correspond in vertical position, the limiting frame 156 is arranged around the elastic damping plate 151, the supporting plate 153 and the bottom plate 155 in a surrounding mode, and the limiting frame 156 is fixedly connected with the bottom plate 155. The vibration damping base 15 of the machine body can effectively reduce the vibration of the concrete mixer during operation, thereby fundamentally reducing the noise generated by the vibration.

Referring to fig. 1 and 3, a mixing drum 11 for containing mixed materials is arranged in the mixing machine body 1; rabbling mechanism 2 includes axis of rotation 21, stirring vane 22 and a plurality of blade

dead lever

23, 21 one end of axis of rotation and motor 3's output fixed connection, and 21 horizontal rotations of axis of rotation support are on stirring

fuselage

1, and 23 one end vertical fixation of blade dead lever are on the outer wall of axis of rotation 21, the other end and stirring vane 22 fixed connection, and when motor 3 ran, axis of rotation 21 drove stirring vane 22 and rotates, stirs the concrete raw materials in the churn 11.

The implementation principle of the concrete mixer of this application embodiment low noise is: when concrete is stirred, a valve of the feed hopper 12 is opened, fine aggregate, coarse aggregate, cement and water are added into the mixing drum 11 in proportion, the valve of the feed hopper 12 is closed after the addition, the motor 3 is opened, the motor 3 drives the rotating shaft 21 and the mixing blades 22 on the rotating shaft 21 to rotate, and the concrete raw materials in the mixing drum 11 are mixed.

When the concrete mixer is operated, the friction between the coarse aggregate and the fine aggregate in the mixing drum 11 and the friction between the mixing raw material and the inner wall of the mixing drum 11 generate noise, and when the noise generated in the mixing drum 11 is transmitted to the outside of the mixer body 1, the noise generated by the inner layer sound insulation pad 142, the sound insulation strip 141 and the outer layer sound insulation pad 143 is weakened in sequence, so that the noise generated by the concrete mixer is reduced. Meanwhile, the vibration of the concrete mixer during operation can be effectively reduced by the damping base 15 of the machine body, so that the noise generated by vibration is reduced fundamentally; fuselage vibration damping mount 15 can also play the cushioning effect between stirring fuselage 1 and ground, reduces the propagation that the noise in the stirring fuselage 1 passes through the ground medium.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a concrete mixer of low noise, is used for rabbling concrete rabbling mechanism (2) and motor (3) for rabbling mechanism (2) provide drive power including stirring fuselage (1), be located stirring fuselage (1), and motor (3) set up in the stirring fuselage (1) outside, its characterized in that: be provided with fuselage puigging (14) on stirring fuselage (1) outer wall, fuselage puigging (14) are including puigging pad and a plurality of sound insulating strip (141), and the cladding of puigging pad is in stirring fuselage (1) outside, and sound insulating strip (141) set up on the sound insulating pad side by side, and sound insulating strip (141) are for inhaling sound insulating strip (141) of material.

2. A low noise concrete mixer according to claim 1, wherein: the soundproof strips (141) are cylindrical.

3. A low noise concrete mixer according to claim 1, wherein: the sound insulation strip (141) is of a hollow structure.

4. A low noise concrete mixer according to any one of claims 1-3, wherein: the pad gives sound insulation and fills up (142) and outer pad (143) that gives sound insulation including the inlayer, and outer pad (143) that gives sound insulation is wrapped in inlayer pad (142) outside, gives sound insulation strip (141) and arranges between inlayer pad (142) and outer pad (143) that gives sound insulation.

5. The low noise concrete mixer of claim 4, wherein: the inner layer sound insulation pad (142) is a sound insulation pad made of sound absorption materials with a micropore structure, and the outer layer sound insulation pad (143) is a sound insulation pad made of sound insulation materials.

6. A low noise concrete mixer according to any one of claims 1-3, wherein: the lower side of the stirring machine body (1) is provided with a machine body damping base (15) with a buffering effect.

7. The low noise concrete mixer of claim 6, wherein: the damping base (15) of the airplane body comprises an elastic damping plate (151), a reed, a bottom plate (155) and a limiting frame (156), the elastic damping plate (151) is arranged on the upper side of the bottom plate (155), the elastic damping plate (151) corresponds to the bottom plate (155) in the vertical position, the section of the reed in the vertical direction is wavy, and the reed is arranged between the elastic damping plate (151) and the bottom plate (155); the limiting frame (156) is arranged around the bottom plate (155), and the upper edge of the limiting frame (156) is higher than the bottom surface of the elastic damping plate (151).

8. A low noise concrete mixer according to claim 7, wherein: fuselage vibration damping mount (15) still include backup pad (153), and the reed includes upper reed (152) and lower floor reed (154), and backup pad (153) set up between upper reed (152) and lower floor reed (154).