CN210289554U

CN210289554U - Ventilation sound insulation structure

Info

Publication number: CN210289554U
Application number: CN201821563005.5U
Authority: CN
Inventors: 朱宇龙; 丁杰; 臧晓斌; 李振鹏; 贺建军
Original assignee: Zhuzhou CRRC Times Electric Co Ltd
Current assignee: Zhuzhou CRRC Times Electric Co Ltd
Priority date: 2018-09-25
Filing date: 2018-09-25
Publication date: 2020-04-10
Anticipated expiration: 2028-09-25

Abstract

The utility model belongs to an electrical equipment's shell structure specifically is to involve a ventilation sound insulation structure, including setting up the mesh board on the door body, the inboard of mesh board is provided with the acoustic baffle, has the passageway that the air feed stream flows between acoustic baffle and the mesh board. The utility model discloses a sound insulation board is the 5mm steel sheet preferably, and this steel sheet is fixed on the enhancement skeleton of the door body, forms the ventilation intermediate layer between sound insulation board and skeleton, and the air can flow through the intermediate layer, the utility model discloses simple structure makes and convenient to use, and ventilation and sound insulation are effectual.

Description

Ventilation sound insulation structure

Technical Field

The utility model belongs to an electrical equipment's shell structure specifically is to involve a ventilation sound insulation structure.

Background

To the radiating electrical equipment that ventilates that needs to carry out, need open wind heat dissipation hole on the cabinet body like the cabinet door, this ventilation louvre needs carry out the circulation of air, consequently the inside and outside UNICOM of ventilation hole, and the interior noise of cabinet also propagates outdoor through the ventilation hole easily, leads to the product noise too big.

Aiming at the problems, the air vent is generally blocked by adopting porous filter cotton, so that the air vent has certain sound absorption and insulation effects. As shown in fig. 1-3, a door 1 of a cabinet body of an electrical device is provided with a ventilation and sound insulation structural member 2, the ventilation and sound insulation structural member 2 includes a mesh plate 3 arranged on the door 1, and a porous filter cotton 4 is arranged on the inner side of the mesh plate 3 (i.e., the side close to a sound source 5 in the device cabinet).

The left picture in fig. 1 is a door body closed state, fig. 2 is a door body open state, and in the use, the door body is in closed state, and at this moment, the negative pressure effect of fan in the cabinet is passed through in the cabinet to the heat dissipation of electrical equipment in the cabinet, is in negative pressure state in the cabinet, and under the effect of negative pressure, the air flows into in the cabinet through the ventilation cooling structure on the cabinet body by outside the cabinet, as the air current arrow in fig. 2 indicates.

Fig. 2 shows a conventional ventilation and heat dissipation structure on a door body, and as can be seen from fig. 2, the conventional ventilation and heat dissipation structure for the door body mainly comprises two parts, and air can flow through holes on a mesh plate 3; air can flow through the porous filter cotton 4, the porous filter cotton 4 has certain sound absorption and insulation effects, but the loss of ventilation resistance is large, so that the air quantity is reduced, and generally a fan with larger power is required to meet the requirement, so that the sound source power in the cabinet is also increased; another disadvantage is that due to the porous structure of the mesh plate 3, impurities such as dust are easy to adhere to pores, and are easy to block after long-time operation, and the air volume is reduced, so that the heat dissipation effect is seriously poor, and equipment in the electrical cabinet is burnt; the third shortcoming is that, because mesh plate 3 and porous filter cotton 4 can the circulation air, the sound wave of noise also directly outwards transmits along with the air to whole ventilation face all is the sound transmission face, as shown in fig. 3, the noise source in the equipment cabinet directly becomes the sound leakage outside the cabinet, leads to cabinet body noise to exceed standard, is difficult to satisfy technical requirement, can't deliver.

The structure has the problems that the ventilation resistance is increased by the filter cotton, the heat dissipation is caused, the power of the fan needs to be increased, the noise of the fan is increased, and the noise is difficult to control due to vicious circulation; in addition, in the long-term operation process, the filter cotton is easy to gather dust and has the hidden trouble of blockage, which is very unfavorable for the reliable operation of the equipment.

At present, relevant units have patents applying for sound insulation doors, but relevant patents such as 'a sound insulation door' and 'a ventilation sound insulation door' are too complex in structure, high in cost and inconvenient to use, and the requirements of simple structure and cost control of conventional projects are difficult to meet.

Chinese patent application No. 201611164323.X discloses a ventilation and sound insulation door, which comprises: the sound insulation door comprises a sound insulation door main body, a vent hole, a sound attenuation pipeline and an active noise reduction system. The sound insulation door main body is provided with a plurality of vent holes, each vent hole is connected with a silencing pipeline, and a set of active noise reduction system is installed in each silencing pipeline. The main body of the soundproof door is of a multilayer soundproof structure, and the soundproof quantity is large. The sound damping duct reduces the noise transmitted from the vent hole through the sound absorbing material and the active noise reduction system. The active noise reduction system can set working time and stopping time, and can start and stop working according to environmental noise change.

The utility model discloses a certain sound insulation effect has, but has adopted more complicated structure and active noise reduction system, and too complicated, the price is high, is not suitable for conventional electrical equipment's simple structure, requirement with low costs.

The Chinese patent application No. 201721010500.9 discloses a soundproof door, which comprises a first soundproof pad, a second soundproof pad, a door frame main body, an internal soundproof board, a first filter screen, a ventilating device, a second filter screen, an external soundproof board, a toughened glass frame, a clamping sleeve, a first toughened glass, an isolation frame, a soundproof frame, a toughened glass second, a vacuum cavity, a fixed frame body, an internal soundproof board and an external soundproof board; the utility model has the advantages of reasonable and simple structure, low in production cost, simple to operate, it is multiple functional, the sound insulation that sets up here fills up one and gives sound insulation and fills up two, can effectually avoid the noise to enter into indoorly from the crack, thereby the effect of sound insulation has been improved, the ventilative device that sets up in addition, can guarantee indoor and outdoor air's flow, acoustic panel one and acoustic panel two here in addition, the noise enters into indoorly when can avoiding the air flow, and the filter screen one and the filter screen two that set up, the dust enters into indoorly when then can avoiding the air flow, toughened glass one and toughened glass two of setting, can be convenient for watch the outdoor condition.

The utility model discloses a have certain sound insulation effect, but the structure is complicated, the material that uses is many, the price is high, is not suitable for the requirement of simple structure, with low costs of conventional electrical equipment.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a ventilation sound insulation structure mainly is applied to electrical equipment, its simple structure, makes and convenient to use, and ventilation and sound insulation are effectual.

The content of the utility model comprises a mesh plate arranged on the door body, the inner side of the mesh plate is provided with a sound insulation plate, and a channel for flowing air flow is arranged between the sound insulation plate and the mesh plate. The utility model discloses a sound insulation board is the 5mm steel sheet preferably, and this steel sheet is fixed on the enhancement skeleton of the door body, forms the ventilation intermediate layer between sound insulation board and skeleton, and the air can flow through the intermediate layer.

The utility model discloses a sound insulation board is for covering the mesh board completely, and sound can not directly pass the through-hole on the mesh board. A gap is arranged between the sound insulation plate and the mesh plate, and the air flow flows through the gap.

The sound insulation plate is of a flat plate or arc-shaped cover structure.

The sound insulation plate is connected with the mesh plate through a sound insulation plate connecting block.

The sound insulation plate and the mesh plate are distributed in parallel.

The distance between the sound insulation board and the mesh board is 1-20cm, preferably 5-15cm, and more preferably 5-10 cm.

The sound insulation board comprises a steel plate and a composite board attached to the surface of the steel plate.

The composite board is formed by pressing iron chips and glass fibers. Preferably, the composite board is formed by pressing iron chips, glass fibers and mineral substances, and the mineral substances are preferably inorganic salt substances such as ferric chloride and the like.

A partition plate is further arranged between the sound insulation plate and the mesh plate, and a circular through hole is formed in the partition plate.

The annular width of the annular through hole is 1/4-3/4, preferably 1/2 of the radius of the partition plate.

A partition plate is further arranged between the sound insulation plate and the mesh plate, and at least one through hole is formed in the partition plate.

And a sound insulation barrel is arranged between the sound insulation plate and the mesh plate, and a plurality of vertically distributed strip-shaped through holes are formed in the sound insulation barrel.

The utility model has the advantages that the structure is simple, the adopted materials are conventional materials, the steel plate with the thickness of 5mm has the sound insulation amount about 20dBA which is far more than the sound absorption and insulation amount about 3dBA of the original porous filter cotton; in addition, the sound transmission area is greatly reduced, the front surface of the original porous filter cotton is a sound transmission surface, and after the structure of the utility model is adopted, the transmission surface is only the cross section of the ventilation interlayer, the sound transmission area is greatly reduced, and the sound transmission amount is reduced by about 6 dBA; in addition, the flow resistance in the ventilation interlayer is small, the flow resistance is reduced by 30% compared with the original scheme, the power of the fan can be reduced under the condition of keeping the original air quantity, the noise is correspondingly reduced by 3dBA, and the running energy consumption of the fan is saved; for the easy condition of blockking up of porous filter screen, this utility model's ventilation intermediate layer does not have the jam risk in addition, need not maintain, and long-term operation reliability promotes by a wide margin.

The utility model discloses a sound insulation board is preferred to be made by multilayer combined material, including steel sheet and the composite sheet of laminating on the steel sheet surface, the steel sheet thickness is 1mm-5mm, preferably 1mm, then pastes the composite sheet on the steel sheet again, and 1 mm's steel sheet sound insulation volume is little, and the thickening steel sheet will lead to material cost too high, adopts the utility model discloses a steel sheet adds reinforcing sound insulation effect that composite sheet structure can be by a wide margin, forms this unobvious increase. The composite board is preferably compounded by scrap iron, glass fiber and high-density mineral substances, is industrial waste and has low cost. The sound insulation amount of the composite structure can reach more than 40dBA, and is far larger than the sound absorption and insulation amount of about 3dBA of the original porous filter screen.

The utility model discloses cancelled porous filter pulp, solved the risk that the filter pulp blockked up, do benefit to the long-term reliable operation of product. The ventilation resistance is reduced by 30%, a fan with lower power can be selected, and the noise of the fan is reduced by 3 dBA. The sound transmission area is effectively reduced, and the comprehensive sound insulation quantity reaches 10 dBA. The adopted materials and structure are simpler, the production efficiency is improved, and the production cost is reduced.

Drawings

Fig. 1 is a schematic structural view of a door body of an electrical apparatus in a closed and opened state.

Remarking: the left is closed state and the right is open state.

Fig. 2 is a schematic view of a ventilation and heat dissipation structure of a conventional door body.

Fig. 3 is a view showing the propagation of air flow and sound in the conventional door body.

Fig. 4 is a schematic view of the structure of the electric device and the door body thereof.

Fig. 5 is a schematic structural diagram of the present invention.

Fig. 6 is a sound propagation diagram of the present invention.

Fig. 7 is a schematic diagram of a preferred structure of the present invention.

In the figure, a door body 1, a ventilation and sound insulation structural member 2, a 3-mesh plate, a 31-mesh, 4-porous filter cotton, a 5-equipment cabinet sound source, a 6-sound insulation plate, a 7-sound insulation plate connecting block, an 8-partition plate, an 81-circular-ring-shaped through hole, a 82-baffle and a 83-partition plate connecting block are shown.

Detailed Description

As shown in fig. 4-7, the utility model comprises a mesh plate 3 arranged on a door body 1, wherein a sound insulation plate 6 is arranged on the inner side of the mesh plate 3, and a channel for air flow to flow is arranged between the sound insulation plate 6 and the mesh plate 3.

The sound insulation plate 6 is of a flat plate or arc-shaped cover structure. The sound insulation board 6 can only cover the mesh board 3, and can also greatly exceed the range of the mesh board 3.

The sound insulation plate 6 is connected with the mesh plate 3 through a sound insulation plate connecting block 7. The sound insulation plate connecting blocks 7 are strip-shaped, and gaps are reserved among the sound insulation plate connecting blocks 7 and used for air flow to pass through.

The sound insulation plate 6 and the mesh plate 3 are distributed in parallel. The parallel arrangement ensures that the minimum material achieves the maximum effect.

The distance between the sound insulation board 6 and the mesh board 3 is 1-20cm, preferably 5-15cm, and more preferably 5-10 cm.

The sound insulation board 6 comprises a steel plate and a composite board attached to the surface of the steel plate.

A partition plate 8 is further arranged between the sound insulation plate 6 and the mesh plate 3, and a circular through hole 81 is formed in the partition plate 8. Baffle 8 passes through baffle connecting block 83 to be fixed on sound insulation board 6 and/or mesh board 3, is circular shape baffle 82 in the ring form through-hole 81, and baffle 82 passes through the connecting block to be fixed on baffle 8, and ring form through-hole 81 is used for the air feed flow to flow, and the sound wave can be reflected by baffle 8 after passing through sound insulation board 6, can guarantee the sound insulation effect this moment, also can guarantee that the air current is smooth and easy, has the sound insulation more than 30 dBA.

The annular width of the annular through hole 81 is 1/4-3/4, preferably 1/3 of the radius of the partition plate 8. When the radius of the circular baffle 82 is 1/4 of the radius of the partition plate 8 and the ring width of the circular through hole 81 is 1/3 of the radius of the partition plate 8, the sound insulation effect is best and the sound insulation amount is more than 38 dBA.

Still be provided with baffle 8 between sound insulation 6 and mesh board 3, be provided with at least one through-hole on the baffle 8, preferably a plurality of through-holes, the diameter of through-hole is greater than the diameter of the mesh of mesh board 3. The sound insulation and ventilation effect is not as good as that of the annular through hole 81.

The sound insulation cylinder is arranged between the sound insulation plate 6 and the mesh plate 3, a plurality of vertically distributed strip-shaped through holes are formed in the sound insulation cylinder, and the sound wave propagation can be greatly limited through the interaction of the strip-shaped through holes and the circular ring-shaped through holes 81.

Claims

1. A ventilation and sound insulation structure comprises a mesh plate (3) arranged on a door body (1), and is characterized in that a sound insulation plate (6) is arranged on the inner side of the mesh plate (3), and a channel for air flow to flow is arranged between the sound insulation plate (6) and the mesh plate (3).

2. A ventilation and sound insulation structure as claimed in claim 1, characterized in that the sound-insulating panel (6) is a flat panel or a circular arc-shaped cover structure.

3. A ventilation and sound-insulation structure as claimed in claim 1, characterized in that the sound-insulation panel (6) and the mesh panel (3) are arranged in parallel.

4. A ventilation and sound-insulation structure as claimed in claim 1, characterized in that the distance between the sound-insulation panel (6) and the mesh panel (3) is 1-20 cm.

5. A ventilation and sound insulation structure as claimed in any one of claims 1 to 4, wherein the sound insulation panel (6) comprises a steel plate and a composite panel attached to the surface of the steel plate.

6. A ventilation and sound insulation structure as claimed in any one of claims 1 to 4, wherein a partition plate (8) is further arranged between the sound insulation plate (6) and the mesh plate (3), and the partition plate (8) is provided with a circular through hole (81).

7. A ventilation and sound insulation structure as claimed in claim 6, characterized in that the annular width of the annular through hole (81) is 1/4-3/4 of the radius of the partition (8).

8. A ventilation and sound insulation structure as claimed in any one of claims 1 to 4, characterized in that a partition plate (8) is arranged between the sound insulation plate (6) and the mesh plate (3), and at least one through hole is arranged on the partition plate (8).

9. A ventilation and sound insulation structure as claimed in any one of claims 1 to 4, wherein a sound insulation cylinder is arranged between the sound insulation plate (6) and the mesh plate (3), and a plurality of vertically distributed strip-shaped through holes are arranged on the sound insulation cylinder.