阅读说明：本技术 一种声屏障的隔音测试装置 (Sound insulation testing device of sound barrier ) 是由 陈顺良 陈顺德 何云超 冯佳 于 2021-07-20 设计创作，主要内容包括：本发明公开了一种声屏障的隔音测试装置,包括混响室、铜箔层、声源、检测槽、声屏障试样、隔声箱、隔声压板、检测孔、声强检测探头、真空腔、稳定连块和抽真空机,所述抽真空机抽取端延伸至真空腔内部,所述混响室内壁上位于检测孔上端的位置前后侧均设有安装支板,所述安装支板之间的位置设有五个均匀分布相互连接的检测锤,所述检测锤同安装支板之间通过转杆转动连接,后侧所述转杆上设有下齿轮,所述下齿轮上端设有同其齿合的半齿轮,后侧所述安装支板后端上侧设有电机,所述电机转动端同半齿轮中心处连接。本发明与现有技术相比的优点在于：可进行空气声以及撞击声隔音测试和试样安装处不会干扰测量结果。(The invention discloses a sound insulation testing device of a sound barrier, which comprises a reverberation chamber, a copper foil layer, a sound source, a detection groove, a sound barrier sample, a sound insulation box, a sound insulation pressing plate, a detection hole, a sound intensity detection probe, a vacuum cavity, a stable connecting block and a vacuumizing machine, wherein the extraction end of the vacuumizing machine extends into the vacuum cavity, mounting support plates are arranged on the front side and the rear side of the position, positioned at the upper end of the detection hole, on the inner wall of the reverberation chamber, mounting support plates are respectively arranged on the front side and the rear side of the position, positioned between the mounting support plates, of the reverberation chamber, five detection hammers which are uniformly distributed and connected with each other are arranged on the front side and the rear side of the mounting support plates, the detection hammers are rotatably connected with the mounting support plates through rotating rods, a lower gear is arranged on the rear side of the rotating rods, a half gear meshed with the upper end of the lower gear is arranged on the rear side of the mounting support plates, and the rotating end of the motor is connected with the center of the half gear. Compared with the prior art, the invention has the advantages that: the air sound and impact sound insulation test can be carried out, and the measurement result cannot be interfered by the installation position of the sample.)

1. The utility model provides a sound insulation testing arrangement of sound barrier, includes reverberation room (1), be equipped with copper foil layer (2) on the reverberation room (1) inner wall, its characterized in that: reverberation room (1) inside sound source (3) of being equipped with, be equipped with detection groove (4) that cooperation sound source (3) used on reverberation room (1) a lateral wall, detect inside sound barrier sample (5) of being equipped with of groove (4), detect inside sound insulation clamp plate (7) that is located to peg graft and is equipped with cooperation sound barrier sample (5) and use of groove (4), sound insulation clamp plate (7) and detection groove (4) lateral wall center department all are equipped with inspection hole (8) towards detection groove (4), sound insulation box (6) inside is equipped with sound intensity test probe (9), inside vacuum cavity (10) that are for with detection groove (4) intercommunication of sound insulation box (6) wall, the inside top surface of vacuum cavity (10), The bottom surface and the side surface are both provided with a stable connecting block (11), one end of the outer upper end of the sound insulation box (6) far away from the reverberation chamber (1) is provided with a vacuum extractor (12), the extraction end of the vacuum extractor (12) extends into the vacuum cavity (10), the front side and the rear side of the position of the inner wall of the reverberation chamber (1) which is positioned at the upper end of the detection hole (8) are respectively provided with an installation support plate (13), five detection hammers (14) which are uniformly distributed and mutually connected are arranged between the mounting support plates (13), the detection hammer (14) is rotatably connected with the installation support plate (13) through a rotating rod (15), a lower gear (16) is arranged on the rotating rod (15) at the rear side, the upper end of the lower gear (16) is provided with a half gear (17) meshed with the lower gear, the upper side of the rear end of the mounting support plate (13) at the rear side is provided with a motor (18), and the rotating end of the motor (18) is connected with the center of the half gear (17).

2. The sound insulation test device of a sound barrier of claim 1, wherein: diffusion sheets (19) are arranged on two sides of the inner top surface of the reverberation chamber (1), and the diffusion sheets (19) are connected with the top surface of the reverberation chamber (1) through connecting plates (20).

3. The sound insulation test device of a sound barrier of claim 1, wherein: and a fixing plate (21) is arranged at one end of the upper end and the lower end of the sound insulation box (6) close to the reverberation chamber (1), and the fixing plate (21) is connected with the side wall of the reverberation chamber (1) through a fixing bolt (22).

4. The sound insulation test device of a sound barrier of claim 1, wherein: and soundproof cotton layers (23) matched with the sound barrier samples (5) are arranged at the positions, around the detection holes (8), on the inner wall of the detection groove (4) and the sound insulation pressing plate (7).

5. The sound insulation test device of a sound barrier of claim 1, wherein: and a square annular sealing gasket (24) is arranged at one end of the sound insulation box (6) positioned in the detection groove (4).

Technical Field

The invention relates to the technical field of sound insulation testing, in particular to a sound insulation testing device for a sound barrier.

Background

The sound barrier is mainly used for sound insulation and noise reduction of highways, expressways, overhead composite roads and other noise sources, and before the sound barrier is put into application, the sound insulation effect of the sound barrier is tested by a sound insulation testing device, so that the used sound barrier can achieve the expected effect. The test device that gives sound insulation of current sound barrier only can carry out the test of making sound insulation of air sound, and can't give sound insulation to the impact sound, causes the result of test not comprehensive enough, and in addition, the test hole department that gives sound insulation of current sound barrier is owing to need install the sample, produces the clearance very easily between the installation, leads to the sound wave to pass from the clearance, influences measuring result.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the defects and provide a sound insulation test device for a sound barrier, which can perform sound insulation test of air sound and impact sound and can not interfere the measurement result at the installation position of a sample.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: a sound insulation testing device of a sound barrier comprises a reverberation chamber, wherein a copper foil layer is arranged on the inner wall of the reverberation chamber, a sound source is arranged inside the reverberation chamber, a detection groove matched with the sound source is formed in one side wall of the reverberation chamber, a sound barrier sample is arranged inside the detection groove, a sound insulation box matched with the sound barrier sample is arranged inside the detection groove in an inserted mode, the opening of the sound insulation box faces towards the detection groove, a sound insulation pressing plate matched with the sound barrier sample is arranged at one end, located at the opening, of the sound insulation box, detection holes are formed in the sound insulation pressing plate and the center of the side wall of the detection groove, a sound intensity detection probe is arranged inside the sound insulation box, a vacuum cavity communicated with the detection groove is arranged inside the sound insulation box wall, stable connection blocks are arranged on the top surface, the bottom surface and the side surface inside the vacuum cavity, and a vacuumizing machine is arranged at one end, far away from the reverberation chamber, of the outer upper end of the sound insulation box, the vacuum-pumping machine is characterized in that the pumping end of the vacuum-pumping machine extends into the vacuum cavity, mounting support plates are arranged on the inner wall of the reverberation chamber and on the front side and the rear side of the position, located at the upper end of the detection hole, of the upper end of the reverberation chamber, five detection hammers which are uniformly distributed and connected with each other are arranged between the mounting support plates, the detection hammers are connected with the mounting support plates through rotating rods in a rotating mode, lower gears are arranged on the rotating rods on the rear sides, half gears meshed with the lower gears are arranged at the upper ends of the lower gears, a motor is arranged on the rear sides of the mounting support plates, and the rotating ends of the motor are connected with the centers of the half gears.

Compared with the prior art, the invention has the advantages that: compared with the prior art, the sound source is arranged in the reverberation chamber, the sound insulation test of air sound can be carried out, the detection hammer capable of swinging and striking is arranged, the detection hammer can be used for beating the sample to carry out the sound insulation test on the impact sound, the test result is more comprehensive, in addition, the vacuum chamber is matched with the vacuum extractor, the gap generated in the detection tank can be matched with the vacuum chamber to be pumped into a vacuum state, the vacuum state can not conduct sound waves, the effective isolation effect can be achieved, and the gap generated by mounting the sound barrier sample in the detection tank is prevented from influencing the detection result.

As an improvement, diffusion sheets are arranged on two sides of the top surface of the interior of the reverberation chamber, and the diffusion sheets are connected with the top surface of the reverberation chamber through connecting plates. The diffusion sheet is used for increasing the diffusion of sound energy, improving the uniformity of a sound field and ensuring the sufficient diffusion of the sound wave.

As an improvement, a fixing plate is arranged at one end, close to the reverberation chamber, of the upper end and the lower end of the sound insulation box, and the fixing plate is connected with the side wall of the reverberation chamber through a fixing bolt. The fixed plate and the fixed bolt can ensure connection and simultaneously ensure that the sound insulation box is firmly pressed in the detection groove.

As an improvement, the inner wall of the detection groove and the sound insulation pressing plate are provided with sound insulation cotton layers which are matched with the sound barrier sample to use at the positions around the detection hole. The sound insulation surface course can fill the sound barrier with detecting the space in groove, supplementary isolated effect of realization.

As an improvement, one end of the sound insulation box, which is positioned in the detection groove, is provided with a square annular sealing gasket. The function of the sealing gasket is to prevent external air from entering, so that the vacuum state in the vacuum cavity disappears.

Drawings

Fig. 1 is a schematic structural view of a sound insulation testing device of a sound barrier according to the present invention.

Fig. 2 is a left side sectional view of a sound barrier sound insulation test apparatus of the present invention.

As shown in the figure: 1. a reverberation chamber; 2. a copper foil layer; 3. a sound source; 4. a detection tank; 5. a sound barrier sample; 6. a sound insulation box; 7. a sound insulation pressure plate; 8. a detection hole; 9. a sound intensity detection probe; 10. a vacuum chamber; 11. stabilizing the connecting block; 12. a vacuum extractor; 13. mounting a support plate; 14. detecting the hammer; 15. a rotating rod; 16. a lower gear; 17. a half gear; 18. a motor; 19. a diffusion sheet; 20. connecting plates; 21. a fixing plate; 22. fixing the bolt; 23. a soundproof cotton layer; 24. and a gasket.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

With reference to the attached drawing 1, a sound insulation testing device of a sound barrier comprises a reverberation chamber 1, wherein a copper foil layer 2 is arranged on the inner wall of the reverberation chamber 1, a sound source 3 is arranged in the reverberation chamber 1, a detection groove 4 matched with the sound source 3 for use is arranged on one side wall of the reverberation chamber 1, a sound barrier sample 5 is arranged in the detection groove 4, a sound insulation box 6 matched with the sound barrier sample 5 for use is arranged in the detection groove 4 in an inserting manner, an opening of the sound insulation box 6 faces the detection groove 4, a sound insulation pressing plate 7 matched with the sound barrier sample 5 for use is arranged at one end, positioned at the opening, of the sound insulation box 6, detection holes 8 are arranged at the centers of the side walls of the sound insulation pressing plate 7 and the detection groove 4, a sound intensity detection probe 9 is arranged in the sound insulation box 6, a vacuum cavity 10 communicated with the detection groove 4 is arranged in the sound insulation box 6, and a stable connecting block 11 is arranged on the top surface, the bottom surface and the side surface in the vacuum cavity 10, the device is characterized in that a vacuumizing machine 12 is arranged at the upper end of the outer portion of the sound insulation box 6, which is far away from the reverberation chamber 1, the vacuumizing machine 12 extends to the inside of the vacuum cavity 10, mounting support plates 13 are arranged on the front side and the rear side of the position, which is located at the upper end of the detection hole 8, on the inner wall of the reverberation chamber 1, five detection hammers 14 which are uniformly distributed and connected with each other are arranged between the mounting support plates 13, the detection hammers 14 are rotatably connected with the mounting support plates 13 through rotating rods 15, lower gears 16 are arranged on the rear sides of the rotating rods 15, half gears 17 meshed with the lower gears 16 are arranged at the upper ends of the lower gears 16, a motor 18 is arranged on the upper sides of the rear ends of the mounting support plates 13, and the rotating ends of the motor 18 are connected with the centers of the half gears 17.

Diffusion sheets 19 are arranged on two sides of the inner top surface of the reverberation chamber 1, and the diffusion sheets 19 are connected with the top surface of the reverberation chamber 1 through connecting plates 20.

And a fixing plate 21 is arranged at one end of the upper end and the lower end of the sound insulation box 6, which is close to the reverberation chamber 1, and the fixing plate 21 is connected with the side wall of the reverberation chamber 1 through a fixing bolt 22.

And soundproof cotton layers 23 matched with the sound barrier sample 5 are arranged on the inner wall of the detection groove 4 and the sound insulation pressing plate 7 at the positions around the detection hole 8.

And a square annular sealing gasket 24 is arranged at one end of the sound insulation box 6 positioned in the detection groove 4.

The working principle of the invention is as follows: the sound insulation of the sound barrier is tested by using the mode of the reverberation chamber 1 and the sound insulation box 6, the sound barrier sample 5 can be tightly pressed in the detection groove 4 by the fixing plate 21 matched with the fixing bolt 22 and sealed by the sealing gasket 24, the vacuum environment of the gap positions in the vacuum cavity 10 and the detection groove 4 is realized by the vacuumizing machine 12, the effective insulation effect is realized, then the sound source 3 is used for generating air sound waves, the sound insulation effect of the sound barrier sample 5 is detected by using the sound intensity detection probe 9, after the measurement of the sound insulation effect of the air sound waves is finished, the motor 18 is started, the detection hammer 14 is controlled to ascend, the sound barrier sample 5 is hit by swinging downwards after the control of the plate gear 17 is separated, the impact sound test is carried out, the sound insulation effect is detected by using the sound intensity detection probe 9, and the comprehensive detection capability is realized.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.