CN220150590U - Sound absorption damping material structural board - Google Patents

Abstract

The utility model relates to a damping plate structure, in particular a sound absorbing damping material structure plate, comprising: the damping plate comprises a damping layer A, a damping layer B, a damping layer C, a metal rib layer, a toughness reinforcing rib layer, splicing grooves and splicing strips.

Description

Sound absorption damping material structural board

Technical Field

The utility model relates to damping materials, in particular to a structural plate of sound absorption damping materials.

Background

The damping plate (damping steel sheet) is a metallurgical noun published in 2019, and is a sandwich composite plate for reducing noise and vibration, and is taken out from the second edition of metallurgical noun. The sandwich is made of high polymer resin, in practical application, air is a moving space in a normal state of human beings, so that a material with larger difference from air density is a material with higher density, namely the material can be regarded as a sound insulation material. The higher the density, the better the sound insulation effect. Such a sheet of material is known as a shock absorbing baffle. In theory, a general object has a sound insulation effect, but a plate having an average sound insulation amount exceeding thirty is called a sound insulation plate. The baffle is typically a high density material.

Generally, the inherent damping of metallic materials (such as steel, lead, copper, etc.) is small, so the damping is often increased by the addition of damping materials. However, since acoustic equipment commonly used in entertainment places such as KTV does not add damping to the metal sheet of the equipment in order to maintain sound quality, a sound insulating material of a damping sound insulating plate is generally used to reduce vibration, and the damping can attenuate vibration energy transmitted along the structure and also attenuate vibration around resonance frequency. In fact, damping is very effective in reducing the vibration of the structure at the resonant frequency.

The damping material and the sound insulation board composed of the wood bolts, the soft rubber or some other high polymer materials can reduce most of noise, and the sound insulation of the sound insulation board is mainly due to the fact that the damping can weaken the bending vibration intensity of the metal board. The noise reduction process is that when the metal is subjected to bending vibration, vibration energy is rapidly transferred to the sound insulation material of a compact vibration source, so that friction and mutual dislocation inside the sound insulation material are damped. Because the damping material has large internal loss and internal friction, a considerable part of vibration energy of the metal plate is converted into heat energy to be lost and scattered, so that the vibration is weakened. In addition, damping can shorten the vibration time of the wall plate excited. If the sound insulation plate is not added, the wall surface is not vibrated for 2 seconds after being impacted; the sound insulation board with the damping material is subjected to the impact force with the same magnitude, the vibration time is greatly shortened, and the sound insulation board can be stopped only by 0.1 s. Many psychologists indicate that 50ms is the overall time of hearing. If the sounding time is less than 50ms, it is difficult for the human ear to feel the sound, thereby achieving the purpose of controlling noise.

The damping plates are all theoretical data of taking the whole damping plates as experimental objects, and the biggest problem in the practical application process is that gaps among the mounted damping plates are large and finally depend on factors of the damping plate sound insulation effect, the sound insulation effect of the seamless homogeneous damping plates made of the same material is 10-20% higher than that of the gap splice plates, however, the damping plates in the practical application cannot be made into whole plates, and the damping plates cannot be transported easily and cannot be determined in advance.

On the premise of ensuring the sound absorption and insulation effects, the noise reduction damping plate is required to be seamless and is convenient to install.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides the damping material plate capable of reducing noise and insulating sound, which is quickly installed.

The utility model is realized by adopting the following technical scheme:

the sound absorption damping material structure plate, the damping plate is a multilayer damping material structure, from outside to inside in sequence damping layer A, damping layer B and damping layer C, damping layer A and damping layer C are the same size layer structure, damping layer B four sides side length is less than damping layer A and damping layer C respectively, the side section figure of structure plate is upper and lower layer length, the I shape figure of intermediate level weak point, the side of damping plate is assembled the recess by the inconsistent recess that forms of damping layer long end, it has the strip of assembling to assemble the recess intrinsic packing in-process.

Preferably, the splicing strips are smeared with pressure-sensitive adhesive.

Preferably, the surface layer structure of the structural plate is a constraint layer structure.

Preferably, pressure sensitive adhesive is adhered between the layers of the structural panel.

Preferably, a metal rib layer is sandwiched between the damping layers A, B, C.

Preferably, the structural board is provided with toughness strengthening rib layer, toughness strengthening rib is the glass fiber structure of fishing net shape, glass fiber structure comprises cross grain net, positive slope line net and anti-slope line net, the contained angle between cross grain net, positive slope line net and the anti-slope line net is 60 degrees.

Compared with the prior art, the utility model has the beneficial effects that: the damping plate is designed into a splicing structure, the head and the tail of the damping plate are spliced together, the splicing structure can ensure that the front surface of the damping plate has no vertical splicing gap, and the sound insulation effect after installation can be greatly improved.

Drawings

FIG. 1 is a schematic diagram of an assembled structure of material structural plates in the utility model;

FIG. 2 is a schematic view of the structure of the reinforcing rib of the present utility model;

FIG. 3 is a schematic structural view of a single damping material structural panel in accordance with the present utility model.

In the figure, a damping material plate A1, a damping material plate B2, a damping material plate C3 and splicing strips 4,

the transverse grid 1c, the positive grid 1a and the negative grid 1b, the included angle alpha=60 degrees, the toughness reinforcing rib layer 5 and the metal rib layer 6.

Detailed Description

The utility model will be further described with reference to the drawings and detailed description.

As shown in FIG. 1, the sound absorption damping material structure plate is a multi-layer damping material structure, the damping layer A1, the damping layer B2 and the damping layer C3 are sequentially arranged from outside to inside, the damping layer A1 and the damping layer C3 are of the same-size layer structure, the side lengths of four sides of the damping layer B2 are respectively smaller than those of the damping layer A1 and the damping layer C3, the cross section graph of the side surface of the structure plate is an I-shaped graph with a long upper layer and a short middle layer, grooves formed by inconsistent long ends of the damping layer are spliced grooves, and splicing strips 4 are filled in the spliced grooves in the splicing process.

Furthermore, the splicing strips 4 are smeared with pressure-sensitive adhesive.

Further, the surface layer structure of the structural plate is a constraint layer structure.

Further, pressure sensitive adhesive is adhered between the layers of the structural plate.

Further, a metal rib layer is sandwiched between the damping layers A, B, C.

Still further, the structural slab is provided with toughness strengthening rib layer, toughness strengthening rib is the glass fiber structure of fishing net shape, glass fiber structure comprises cross grain net 1c, positive slope line net 1a and anti-slope line net 1b, the contained angle between cross grain net 1c, positive slope line net 1a and the anti-slope line net 1b is 60 degrees.

The sound absorption damping material structure plate is divided into two parts: the utility model provides an I-shaped adhesive gap structure, wherein the same sound absorption damping materials are adopted for the assembled strips inserted in grooves, the material selection of a damping layer A, B, C is not in a protection range in the utility model, and the sound insulation effect of the structure can be improved by more than 10% under the condition of the same material regardless of the material adopted.

Glass fibers with the same material and the fishing net-shaped structure are coated on the tile for impact resistance test.

Impact resistance test:

according to the tile industry detection method, one kilogram of steel balls drop from one meter high and are not obviously damaged, wherein three times of repeated tests are qualified, wherein the tile with the thickness of 2.8mm and the gravity acceleration are 9.8, and the impact kinetic energy which can be born by the tile is calculated to be 9.8 joules;

in repeated experiments, the grid cloth tiles with the coated transverse and longitudinal grid cloth tiles have the impact resistance of 20 joules to 30 joules due to different individual deviations of the attachment state of the grid cloth, and the experimental data are only reference data and the average value is 25 joules.

Comparative example 2

Intensity before and after adding the tendon to test data:

in the impact resistance test of the rib tile, the impact kinetic energy resistance of the tile depends on the material of the rib, the test results of different filament numbers in the homogeneous mesh are different, 25 filaments and 310 g glass fiber per square are used as the rib to carry out the test experiment of impact limit energy, the results of multiple tests are 15 joules to 25 joules, wherein interference factors such as different adhesion force of the rib, different depth position and the like can interfere the test results, the test data is only reference data, and the average value of the test data is 20 joules.

Comparative example 3

Impact kinetic energy test of transverse and longitudinal grain gridding cloth and fishing net grain gridding cloth

The method comprises the steps of taking tiles of the same material and 25 glass fiber mesh cloth to conduct impact strength test, wherein the impact strength of the fishing net mesh cloth generates different deviations according to different mesh sizes, experimental data are only reference data, the impact resistance of the average transverse and longitudinal mesh cloth tiles is 25 joules, and the impact kinetic energy of the fishing net mesh cloth tiles is greater than 30 joules.

The tile with the glass fiber as the rib and the coated fishing net graticule cloth is subjected to an impact strength test, and the impact strength of the tile is 60 joules, namely, the tile can resist falling of six kilograms of heavy objects from a height of 1 meter without damage.

The data are experimental data, wherein the interlayer positions of the tendons and the mesh data of the fishing net graticule are all average values, and the specific impact resistance is based on actual production.

According to the utility model, the structural characteristics of the middle layer sandwiched and covered grid glass fiber reinforced yarns are adopted, so that the toughness strength of the material plate can be effectively enhanced, and the reinforced wire mesh grid structure effect of the fishing net structure is optimal through multiple impact resistance tests.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (6)

1. The sound absorption damping material structural slab is characterized in that: the structure plate is of a multi-layer damping material structure, a damping layer A, a damping layer B and a damping layer C are sequentially arranged from outside to inside, the damping layer A and the damping layer C are of the same-size layer structure, four sides of the damping layer B are respectively smaller than the damping layer A and the damping layer C, cross-sectional patterns of the side face of the structure plate are long in the upper layer and the lower layer, I-shaped patterns with short middle layers are formed, grooves formed by inconsistent long ends of the damping layer are spliced grooves, and splicing strips are filled in the spliced grooves in the splicing process.

2. The sound absorbing damping material structural panel of claim 1, wherein: and the splicing strips are smeared with pressure-sensitive adhesive.

3. The sound absorbing damping material structural panel of claim 1, wherein: the surface layer structure of the structural plate is a constraint layer structure.

4. The sound absorbing damping material structural panel of claim 1, wherein: pressure sensitive adhesive is adhered between layers of the structural plate.

5. The sound absorbing damping material structural panel of claim 1, wherein: a metal rib layer is sandwiched between the damping layers A, B, C.

6. The sound absorbing damping material structural panel of claim 1, wherein: the structure plate is provided with a toughness reinforcing rib layer, the toughness reinforcing rib is a glass fiber structure in a fishing net shape, the glass fiber structure is composed of a transverse grain grid, a positive inclined grain grid and a negative inclined grain grid, and included angles among the transverse grain grid, the positive inclined grain grid and the negative inclined grain grid are all 60 degrees.