CN218975128U - Noise reduction and sound insulation plate and conveying equipment - Google Patents

Abstract

The utility model provides a noise reduction and sound insulation board and conveying equipment, wherein the noise reduction and sound insulation board comprises a board body and a cover board, the board body comprises a plurality of rows of first noise reduction hole groups and a plurality of rows of second noise reduction hole groups, the first noise reduction hole groups and the second noise reduction hole groups extend along the length direction of the board body, the plurality of first noise reduction hole groups and the plurality of second noise reduction hole groups are alternately arranged in the width direction of the board body, the minimum distance between any two adjacent first noise reduction hole groups and/or any two adjacent second noise reduction hole groups is 18-22mm, one side of the board body is covered by the cover board, and the other side of the board body is used for being connected with the outer wall of a chute. According to the technical scheme provided by the utility model, the problem of large noise generated after materials strike the chute in the prior art can be solved.

Description

Noise reduction and sound insulation plate and conveying equipment

Technical Field

The utility model relates to the technical field of noise reduction and sound insulation, in particular to a noise reduction and sound insulation plate and conveying equipment.

Background

Industrial and mining enterprises generate industrial and mining noise due to machine rotation and material transportation. It not only causes physiological changes and damages of users such as hearing, nervous system and the like, but also causes adverse effects on many aspects such as psychology, life, working efficiency, safety management and the like. In the coal washing and selecting processing process, the noise generated by the impact of the coal transportation and transfer, especially the bulk coal and the transfer chute is a main component of industrial and mining noise. The noise reduction method measures of the coal washery at the present stage are as follows: 1. the aged mechanical equipment is replaced in time, so that noise pollution is reduced; 2. checking the running condition of equipment, and timely removing the faults and improper maintenance reasons of the equipment; 3. the inside and the outside of an exhaust outlet or an exhaust pipe of the mechanical equipment are provided with a muffler or special sound absorption and insulation materials on the drawing, so that noise pollution is reduced; the noise can be effectively reduced by improving the noise source through the transformation, design and construction of corresponding equipment and facilities in a newly built factory, but the noise pollution can be reduced only in the noise transmission process through the reduction of factories and mines which are not put into production according to the noise reduction design.

For multi-frequency impact of materials (lump coal or gangue) of coal enterprises and chute steel plates, the multi-frequency impact noise comprises middle-low frequency noise in 20-20000Hz sound waves which can be identified by human ears and infrasonic waves which are not heard by human ears and are less than 20Hz, the wavelength of the infrasonic waves is 16.7-16.7 m, and the noise is mainly the noise with the wavelength of 6-16.7 m and the noise with the wavelength of more than 16.7 m. The propagation speed of sound wave of noise in air is 340m/s, and the propagation speed in steel is 5000m/s. The low-frequency noise has high intensity, and can generate strong vibration to the eardrum membrane of a human body, and meanwhile, the infrasonic wave is close to the natural frequency (more than ten Hz) of organs and brains of the human body, so that the phenomenon of resonance is easy to generate, and the extremely uncomfortable phenomenon of the human body is caused. In order to reduce industrial and mining noise generated by impact of materials on a chute in the production process and improve the working environment of workers, noise reduction and reconstruction of the chute are necessary.

Disclosure of Invention

The utility model provides a noise reduction and sound insulation plate and conveying equipment, which are used for solving the problem of large noise generated after materials strike a chute in the prior art.

In order to solve the above problems, according to one aspect of the present utility model, there is provided a noise reduction and insulation board, comprising a board body and a cover plate, wherein the board body comprises a plurality of rows of first noise reduction hole groups and a plurality of rows of second noise reduction hole groups, the first noise reduction hole groups and the second noise reduction hole groups extend along the length direction of the board body, the plurality of first noise reduction hole groups and the plurality of second noise reduction hole groups are alternately arranged in the width direction of the board body, the minimum distance between any two adjacent first noise reduction hole groups and/or any two adjacent second noise reduction hole groups is 18-22mm, and the cover plate covers one side of the board body, and the other side of the board body is used for being connected with the outer wall of a chute.

Further, the plurality of first silencing hole groups comprise a plurality of first sub-silencing holes, the plurality of first sub-silencing holes are arranged at intervals along the length direction of the plate body, and the minimum distance between two adjacent first sub-silencing holes in one group of first silencing hole groups is 18-22mm.

Further, the plurality of second silencing hole groups comprise a plurality of second silencing holes, the plurality of second silencing holes are arranged at intervals along the length direction of the plate body, and the minimum distance between two adjacent second silencing holes in one group of second silencing holes is 18-22mm.

Further, the aperture of the first sub-silencing holes and/or the second sub-silencing holes is 15-25mm.

Further, the thickness of the plate body is 20mm or more.

Further, the noise reduction and insulation plate is made of a rubber material.

Further, the noise reduction baffle is made of a multi-layered material.

Further, the thickness of the cover plate is 8-12mm.

Further, the cover plate is made of a rubber material.

According to another aspect of the present utility model, there is provided a conveying apparatus including the noise reduction baffle described above.

By applying the technical scheme of the utility model, the noise reduction and sound insulation plate comprises a plate body and a cover plate, wherein the plate body comprises a plurality of rows of first noise reduction hole groups and a plurality of rows of second noise reduction hole groups, the first noise reduction hole groups and the second noise reduction hole groups extend along the length direction of the plate body, the plurality of first noise reduction hole groups and the plurality of second noise reduction hole groups are alternately arranged in the width direction of the plate body, the minimum distance between any two adjacent first noise reduction hole groups and/or any two adjacent second noise reduction hole groups is 18-22mm, one side of the plate body is covered by the cover plate, and the other side of the plate body is used for being connected with the outer wall of a chute. By adopting the scheme, the multi-row first silencing hole groups and the multi-row second silencing hole groups are arranged, so that high-frequency noise can be better absorbed, the minimum distance between any two adjacent first silencing hole groups and/or any two adjacent second silencing hole groups is set to be 18-22mm, the reduction of partial low-frequency noise is facilitated, the separation between the first silencing hole groups and the second silencing hole groups is similar to the projection, the diffusion reflection of middle-low frequency noise with longer wavelength is facilitated on the convex surface, meanwhile, the diffraction wave is weakened by the hole wall in the transmission process of the diffraction wave, and after the diffraction wave of the sound wave enters the silencing hole; and after the cover plate covers one side of the cover plate body, a tympanic membrane can be formed, and resonance or resonance of the tympanic membrane is caused by energy of noise vibration to further offset the energy of noise, so that the problem of large noise generated after materials strike the chute in the prior art is effectively solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic structural view of a noise reduction and insulation board according to a first embodiment of the present utility model;

FIG. 2 shows a schematic view of the noise reducing baffle of FIG. 1 mounted on a chute.

Wherein the above figures include the following reference numerals:

10. a plate body; 11. a first sound deadening hole group; 111. a first sub-sound deadening hole; 12. a second sound deadening hole group; 121. a second sub-sound deadening hole;

20. and a cover plate.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 2, a first embodiment of the present utility model provides a noise reduction and insulation board, which includes a board body 10 and a cover plate 20, wherein the board body 10 includes a plurality of rows of first noise reduction hole groups 11 and a plurality of rows of second noise reduction hole groups 12, the first noise reduction hole groups 11 and the second noise reduction hole groups 12 each extend along a length direction of the board body 10, the plurality of first noise reduction hole groups 11 and the plurality of second noise reduction hole groups 12 are alternately arranged in a width direction of the board body 10, a minimum distance between any two adjacent first noise reduction hole groups 11 and/or any two adjacent second noise reduction hole groups 12 is 18-22mm, the cover plate 20 covers one side of the board body 10, and the other side of the board body 10 is used for being connected with an outer wall of a chute.

By adopting the scheme, through arranging the plurality of rows of the first silencing hole groups 11 and the plurality of rows of the second silencing hole groups 12, better absorbing capacity can be realized on high-frequency noise, and the minimum distance between any two adjacent first silencing hole groups 11 and/or any two adjacent second silencing hole groups 12 is set to 18-22mm, so that partial low-frequency noise is reduced, the partition between the first silencing hole groups 11 and the second silencing hole groups 12 is similar to a bulge, the diffusion reflection of middle-low-frequency noise with longer wavelength is facilitated on the convex surface, the eardrum is formed after the cover plate covers one side of the cover plate body, meanwhile, the diffraction wave is weakened by the hole wall in the transmission process, and when the diffraction wave of the sound wave enters the plurality of first silencing hole groups 11 and the plurality of second silencing hole groups 12, the resonance of the eardrum is caused by the energy of noise vibration, so that the noise energy is further counteracted, and the problem of larger noise generated after the material is impacted in the prior art is effectively solved. In the present embodiment, the minimum distance between any adjacent two of the first sound deadening hole groups 11 and/or any adjacent two of the second sound deadening hole groups 12 is 20mm, so that the noise reduction effect of the noise reduction and insulation panel can be optimized.

It should be noted that: the noise reduction acoustic baffle plate is integrally and naturally covered on the outer wall of the chute during installation, and a layer of air layer is formed between the outer wall of the chute, the noise reduction acoustic baffle plate and the first noise reduction hole groups 11 and the second noise reduction hole groups 12 on the noise reduction acoustic baffle plate to separate the vibration of the chute from being transmitted outwards. When the noise reduction and insulation device is used, the vibration of the outer wall of the chute causes the vibration of an air layer and the fluctuation vibration of the noise reduction and insulation plate, and the energy of the noise vibration is weakened step by step in the transmission process, so that a good noise reduction effect is achieved.

The plurality of first silencing hole groups 11 include a plurality of first sub-silencing holes 111, the plurality of first sub-silencing holes 111 are arranged at intervals along the length direction of the plate body 10, and the minimum distance between two adjacent first sub-silencing holes 111 in one group of first silencing hole groups 11 is 18-22mm. The plurality of first sub-noise reduction holes 111 are arranged at intervals along the length direction of the plate body 10, and the minimum distance between two adjacent first sub-noise reduction holes 111 in one group of first noise reduction hole groups 11 is 18-22mm, so that the noise reduction effect of the noise reduction and insulation plate can be optimized.

Further, the plurality of second silencing hole sets 12 include a plurality of second silencing sub-holes 121, the plurality of second silencing sub-holes 121 are arranged at intervals along the length direction of the plate body 10, and the minimum distance between two adjacent second silencing sub-holes 121 in one set of second silencing hole sets 12 is 18-22mm. The plurality of second sub-noise reduction holes 121 are arranged at intervals along the length direction of the plate body 10, and the minimum distance between two adjacent second sub-noise reduction holes 121 in the group of second noise reduction holes 12 is 18-22mm, so that the noise reduction effect of the noise reduction and insulation plate can be optimized.

Wherein the apertures of the first sub-silencing holes 111 and/or the second sub-silencing holes 121 are 15-25mm. The apertures of the first sub-silencing holes 111 and/or the second sub-silencing holes 121 are set to be 15-25mm, so that compared with the conventional design that the apertures of the first sub-silencing holes 111 and/or the second sub-silencing holes 121 are 3mm or 8mm, the design is beneficial to reducing part of low-frequency noise.

Specifically, the thickness of the plate body 10 is 20mm or more. By this arrangement, the noise reduction effect of the noise reduction and insulation board can be optimized.

In this embodiment, the noise reduction baffle is made of a rubber material. The noise reduction and insulation plate is made of rubber materials, and the rubber materials have elasticity, so that a good noise reduction effect is achieved.

Specifically, the noise reduction baffle is made of multiple layers of materials. Thus, the device has better silencing and noise reducing effects. In this embodiment, the noise reduction and insulation board is made of seven layers of nylon waste belts.

In this embodiment, the cover plate 20 has a thickness of 8-12mm. By this arrangement, the noise reduction effect of the noise reduction and insulation board can be optimized.

In the present embodiment, the cover plate 20 is made of a rubber material. The cover plate 20 is made of rubber material, and the rubber material has elasticity, so that a good noise reduction effect is achieved.

In a second embodiment, not shown in the figures, a conveying apparatus is provided, the conveying apparatus comprising the noise reduction baffle described above. By adopting the scheme, through arranging the plurality of rows of the first silencing hole groups 11 and the plurality of rows of the second silencing hole groups 12, better absorbing capacity can be realized on high-frequency noise, and the minimum distance between any two adjacent first silencing hole groups 11 and/or any two adjacent second silencing hole groups 12 is set to 18-22mm, so that partial low-frequency noise is reduced, the partition between the first silencing hole groups 11 and the second silencing hole groups 12 is similar to a bulge, the diffusion reflection of middle-low-frequency noise with longer wavelength is facilitated on the convex surface, the eardrum is formed after the cover plate covers one side of the cover plate body, meanwhile, the diffraction wave is weakened by the hole wall in the transmission process, and when the diffraction wave of the sound wave enters the plurality of first silencing hole groups 11 and the plurality of second silencing hole groups 12, the resonance of the eardrum is caused by the energy of noise vibration, so that the noise energy is further counteracted, and the problem of larger noise generated after the material is impacted in the prior art is effectively solved. In the present embodiment, the minimum distance between any adjacent two of the first sound-deadening hole groups 11 and/or any adjacent two of the second sound-deadening hole groups 12 is 20mm, so that the noise reduction effect of the conveying apparatus can be optimized.

The installation method of the scheme is as follows:

1. the noise reduction and sound insulation plates are cut according to the width dimensions of the four surfaces of the chute respectively, the four surfaces of the outer wall of the chute are completely coated, and seams between the surfaces and between adjacent noise reduction and sound insulation plates on the same surface are as tight as possible and can be connected and fixed by iron wires in a similar sewing manner;

2. the noise reduction and sound insulation plate is fixed on the chute in a manner of only fixing the edges and corners of four surfaces of the chute, and the edges of the noise reduction and sound insulation plate on two surfaces can be simultaneously pressed by bolts and triangular steel for fixation.

Embodiments of noise reduction and insulation panels utilizing this scheme are as follows:

table 1 application of noise reducing and insulating panels

Sequence number	Application site	Pre-installation noise level	Post-installation noise level	Noise reduction effect
					1	M coal washery	92dB	81dB	11dB
2	Z coal washery	88dB	78dB	10dB

As can be seen from table 1, after the noise reduction and insulation board using the scheme is installed on the outer wall of the chute, the noise value around the chute is reduced by 10 dB on average, wherein the unit of the noise value is dB.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a noise reduction acoustic celotex board, its characterized in that includes plate body (10) and apron (20), plate body (10) are including multirow first amortization hole group (11) and multirow second amortization hole group (12), first amortization hole group (11) with second amortization hole group (12) are all followed the length direction of plate body (10) extends, and a plurality of first amortization hole group (11) and a plurality of second amortization hole group (12) are in the width direction of plate body (10) sets up in turn, arbitrary adjacent two minimum distance between first amortization hole group (11) and/or the arbitrary adjacent two between second amortization hole group (12) is 18-22mm, apron (20) cover one side of plate body (10), the opposite side of plate body (10) is used for the outer wall connection of chute and chute.

2. A noise reduction and insulation board according to claim 1, characterized in that a plurality of the first sound attenuation hole groups (11) comprise a plurality of first sub sound attenuation holes (111), the plurality of first sub sound attenuation holes (111) are arranged at intervals along the length direction of the board body (10), and the minimum distance between two adjacent first sub sound attenuation holes (111) in one group of the first sound attenuation hole groups (11) is 18-22mm.

3. A noise reduction and insulation board according to claim 2, characterized in that a plurality of the second sound attenuation hole groups (12) comprise a plurality of second sub sound attenuation holes (121), the plurality of second sub sound attenuation holes (121) are arranged at intervals along the length direction of the board body (10), and the minimum distance between two adjacent second sub sound attenuation holes (121) in one group of the second sound attenuation hole groups (12) is 18-22mm.

4. A noise reducing baffle according to claim 3, characterized in that the apertures of the first sub-sound deadening holes (111) and/or the second sub-sound deadening holes (121) are each 15-25mm.

5. A noise reducing and insulating panel according to claim 1, characterized in that the thickness of the panel body (10) is 20mm or more.

6. The noise reducing baffle of claim 1 wherein the noise reducing baffle is made of a rubber material.

7. The noise reducing baffle of claim 1 wherein the noise reducing baffle is made of multiple layers of material.

8. A noise reducing baffle according to claim 1, characterized in that the cover plate (20) has a thickness of 8-12mm.

9. Noise reducing baffle according to claim 1, characterized in that the cover plate (20) is made of a rubber material.

10. A conveying apparatus, characterized in that it comprises a noise-reducing baffle according to any one of claims 1 to 9.

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