Noise reduction unit

Abstract

The noise reduction unit comprises a rectangular outer frame, the rectangular outer frame is provided with partition plates, rectangular annular grooves are formed in the two sides of the rectangular outer frame, outer plates are installed on the two sides of the rectangular outer frame, annular strips are formed on the inner walls of the outer plates, the annular strips penetrate into the rectangular annular grooves, protruding blocks are arranged on the inner walls of the outer plates, clamping grooves are formed in the protruding blocks, and the partition plates penetrate into the clamping grooves. The cavity formed by the rectangular outer frame and the outer plate is vacuumized, when noise passes through the cavity, the noise reduction effect is improved due to the fact that the number of media used for sound transmission in the cavity is small, and the partition plates are arranged to support the outer plate during vacuumizing, so that deformation of the outer plate is avoided. Meanwhile, the sealing effect between the outer plate and the rectangular outer frame can be improved through the arrangement of the annular strip and the rectangular annular groove, so that the vacuum degree in the cavity is ensured, and the weight of the noise reduction unit is reduced due to the adoption of a vacuumizing mode, so that the noise reduction unit is convenient to install.

Description

Technical Field

[0001] The utility model relates to the technical field of sound barriers, in particular to a noise reduction unit. Background Art

[0002] Sound barriers are installed on both sides of the road to reduce the noise generated by vehicles. Conventional noise reduction units are made of plastic, and sound-absorbing pads are installed inside. When noise passes through the noise reduction unit, most of the noise is absorbed by the sound-absorbing pads. However, since it is made of plastic, it is prone to aging, and the aged noise reduction unit is prone to breakage, which affects its noise reduction effect and easily causes traffic accidents. At the same time, the effect of this noise reduction method is poor, so it is necessary to improve it. Utility Model Content

[0003] The utility model provides a noise reduction unit to solve the above-mentioned deficiencies of the prior art, prolong its service life, and also improve its noise reduction effect, and has strong practicality.

[0004] In order to achieve the purpose of this utility model, the following technologies are proposed:

[0005] A noise reduction unit includes a rectangular outer frame, a plurality of partitions are arranged inside the rectangular outer frame, a gap exists between the other end of the partition and the inner wall of the rectangular outer frame, rectangular annular grooves are provided on both sides of the rectangular outer frame, outer plates are installed on both sides of the rectangular outer frame, annular strips are formed on the inner wall of the outer plate, the annular strips are passed through the rectangular annular grooves, a convex block is provided on the inner wall of the outer plate, a slot is provided on the convex block, and the partitions are passed through the slots. The cavity formed by the rectangular outer frame and the outer plate is vacuumed, and when noise passes through the cavity, the noise reduction effect is improved because there is less medium inside the cavity for sound propagation, and the partition is arranged to support the outer plate when vacuuming, thereby preventing it from being deformed. At the same time, the arrangement of the annular strips and the rectangular annular grooves can improve the sealing effect between the outer plate and the rectangular outer frame, thereby ensuring the vacuum degree in the cavity, and because the vacuuming method is adopted, the weight of the noise reduction unit is reduced, so it is convenient to install.

[0006] Furthermore, the rectangular outer frame is made of plastic, and this material is used to reduce costs and facilitate molding.

[0007] Furthermore, two sides of the rectangular outer frame are provided with T-shaped grooves, a connecting strip is inserted into the T-shaped groove, and two sides of the connecting strip are provided with connecting grooves, so that the connecting strips facilitate the connection and fixing operation between two adjacent noise reduction units.

[0008] Furthermore, a shielding plate is provided on the outer wall of the outer plate, and a plurality of spacers are provided on the shielding plate. The provision of the spacers can expand the noise blocking area, thereby improving the noise reduction effect, and can also avoid collision, reducing the possibility of direct collision with the shielding plate.

[0009] Furthermore, the shielding plate is made of aluminum alloy, which serves as a hardened protective shell to increase the service life of the noise reduction unit and effectively protect the components inside it to avoid damage to the outer plate and the like.

[0010] Furthermore, a connecting valve is provided on the rectangular outer frame, and the connecting valve includes an inner extension tube installed on one side of the rectangular outer frame, an end plate is provided at the inner end of the inner extension tube, a plurality of holes are provided on the end plate, a blocking rod is inserted into the holes, a sealing disk is provided at the outer end of the blocking rod, a through hole is provided on the sealing disk, a connecting tube is provided on the sealing disk, the connecting tube is connected with the through hole, a sleeve is provided at the outer end of the connecting tube, the sleeve is provided at the outer end of the inner extension tube, a spring is provided between the sleeve and the sealing disk, and the spring is sleeved on the connecting tube. The connecting valve is provided to facilitate the operator to perform vacuum operation.

[0011] The advantages of the above technical solution are:

[0012] The utility model improves the noise reduction effect of the noise reduction unit and also increases the service life of the noise reduction unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0014] Figure 1 A three-dimensional structural diagram of one embodiment is shown.

[0015] Figure 2 A three-dimensional structural diagram of the connecting strip is shown.

[0016] Figure 3 A three-dimensional structural diagram of a rectangular outer frame is shown.

[0017] Figure 4 A three-dimensional structural diagram of the outer panel is shown.

[0018] Figure 5 A cross-sectional view of the communication valve is shown. DETAILED DESCRIPTION

[0019] like Figure 1~Figure 5 As shown, a noise reduction unit includes a rectangular outer frame 1, which is a plastic product. A plurality of partitions 14 are arranged inside the rectangular outer frame 1, and there is a gap between the other end of the partition 14 and the inner wall of the rectangular outer frame 1, and rectangular annular grooves 13 are provided on both sides of the rectangular outer frame 1. External plates 15 are installed on both sides of the rectangular outer frame 1, and an annular strip 16 is formed on the inner wall of the external plate 15, and the annular strip 16 is passed through the rectangular annular groove 13, and a convex block 150 is arranged on the inner wall of the external plate 15, and a slot 18 is provided on the convex block 150, and the partition 14 is passed through the slot 18.

[0020] T-shaped grooves 12 are formed on both sides of the rectangular outer frame 1 , a connecting strip 2 is inserted into the T-shaped groove 12 , and connecting grooves 20 are formed on both sides of the connecting strip 2 .

[0021] A shielding plate 3 is provided on the outer wall of the outer plate 15 , and a plurality of spacer bars 30 are provided on the shielding plate 3 . The shielding plate 3 is made of aluminum alloy.

[0022] A connecting valve is provided on the rectangular outer frame 1, and the connecting valve includes an inner extension tube 4 installed on one side of the rectangular outer frame 1, an inner end of the inner extension tube 4 is provided with an end plate, a plurality of holes are opened on the end plate, a blocking rod 44 is passed through the holes, a sealing disk 42 is provided at the outer end of the blocking rod 44, a through hole is opened on the sealing disk 42, a connecting tube 41 is provided on the sealing disk 42, the connecting tube 41 is connected with the through hole, a ring 40 is provided at the outer end of the connecting tube 41, the ring 40 is provided at the outer end of the inner extension tube 4, a spring 43 is provided between the ring 40 and the sealing disk 42, and the spring 43 is sleeved on the connecting tube 41.

[0023] When assembling the noise reduction unit in this embodiment, the rectangular outer frame 1 is first injection molded, and then the outer plate 15 is pasted on the rectangular outer frame 1, and then the shielding plate 3 is pasted on the outer plate 15. After completion, the connecting pipe 41 is pulled outward, and then the suction pipe of the exhaust device is connected to the connecting pipe 41. When the connecting pipe 41 moves outward, the blocking of the hole by the blocking rod 44 is cancelled, and the exhaust device is started, and the air is extracted through the exhaust device. After the extraction is completed, the pipe is pulled out of the connecting pipe 41, and then the blocking rod 44 is reinserted into the hole under the action of the spring 43 and the pressure difference, and then the noise reduction unit is assembled. During assembly, the connecting strip 2 is first inserted into the T-slot 12 of the rectangular outer frame 1, and then other noise reduction units are clamped on the connecting strip 2. When the noise passes through the noise reduction unit, part of the noise will be reflected by the shielding plate 3, while the unreflected noise will pass through the outer plate 15 and enter the cavity. When the air enters the cavity, the propagation of the noise is further blocked due to the lack of the necessary propagation medium.

[0024] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model is also intended to include these modifications and variations.

Claims

1. A noise reduction unit, characterized in that: It comprises a rectangular outer frame (1), a plurality of partitions (14) are arranged inside the rectangular outer frame (1), a gap is provided between the other end of the partition (14) and the inner wall of the rectangular outer frame (1), and rectangular annular grooves (13) are provided on both sides of the rectangular outer frame (1); External plates (15) are installed on both sides of the rectangular external frame (1), an annular strip (16) is formed on the inner wall of the external plate (15), the annular strip (16) is inserted into the rectangular annular groove (13), a convex block (150) is provided on the inner wall of the external plate (15), a slot (18) is formed on the convex block (150), and the partition plate (14) is inserted into the slot (18).

2. The noise reduction unit according to claim 1, characterized in that: The rectangular outer frame (1) is made of plastic.

3. The noise reduction unit according to claim 1, characterized in that: T-shaped grooves (12) are provided on both sides of the rectangular outer frame (1), a connecting strip (2) is inserted into the T-shaped groove (12), and connecting grooves (20) are provided on both sides of the connecting strip (2).

4. The noise reduction unit according to claim 1, characterized in that: A shielding plate (3) is provided on the outer wall of the outer plate (15), and a plurality of partition bars (30) are provided on the shielding plate (3).

5. The noise reduction unit according to claim 4, characterized in that: The shielding plate (3) is made of aluminum alloy.

6. The noise reduction unit according to claim 1, characterized in that: A connecting valve is provided on the rectangular outer frame (1), and the connecting valve comprises an inner extension tube (4) mounted on one side of the rectangular outer frame (1); an end plate is provided at the inner end of the inner extension tube (4); a plurality of holes are provided on the end plate; blocking rods (44) are inserted into the holes; a sealing plate (42) is provided at the outer end of the blocking rod (44); a through hole is provided on the sealing plate (42); a connecting tube (41) is provided on the sealing plate (42); the connecting tube (41) is connected to the through hole; a sleeve (40) is provided at the outer end of the connecting tube (41); the sleeve (40) is provided at the outer end of the inner extension tube (4); a spring (43) is provided between the sleeve (40) and the sealing plate (42); the spring (43) is sleeved on the connecting tube (41).

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