A kind of underground type windward silencing device

Abstract

A ground-hidden windward silencing device comprises an air inlet cover plate and a silencing chamber located below the air inlet cover plate, wherein the air inlet cover plate is connected to an electric lifting device, the upper surface of the air inlet cover plate is flush with the floor of the silencing chamber, the lower surface of the air inlet cover plate is connected to the silencing chamber through a first flange and a connecting pipe, the connecting pipe is located in the silencing chamber, and the inner wall of the silencing chamber is provided with a silencing hole. The present invention is located below the floor of the silencing chamber and does not occupy the space in the silencing chamber. At the same time, the present invention makes silencing improvements at the air inlet cover plate and in the silencing chamber, respectively, and the entire silencing device has a simple structure and a good silencing effect.

Description

Technical Field

[0001] The invention belongs to the technical field of silencers, and in particular relates to an underground type windward silencer. Background Art

[0002] An anechoic chamber is a sound measurement environment. To achieve a better measurement effect, all soundproof walls in the anechoic chamber need to be covered with sharp spikes so that each surface can absorb noise. In the prior art, most anechoic chambers are relatively small in size, while the test bench inside the anechoic chamber is relatively large. When the anechoic effect of the anechoic chamber does not achieve the expected effect, it is necessary to expand the volume of the anechoic chamber and increase the contact area between the propagating air and each surface of the anechoic chamber, thereby improving the anechoic effect of the anechoic chamber. Such an improvement method undoubtedly increases the anechoic cost and increases the floor space of the anechoic chamber, and is not suitable for working environments with small spaces and high anechoic requirements. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and provide an underground windward silencer, comprising an air inlet cover and a silencer chamber located below the air inlet cover, the air inlet cover is connected to an electric lifting device, the upper surface of the air inlet cover is flush with the floor of the silencer chamber, the lower surface of the air inlet cover is connected to the silencer chamber through a first flange and a connecting pipe, the connecting pipe is located in the silencer chamber, the inner wall of the silencer chamber is provided with a silencer hole, and the silencer hole is provided with a silencer material.

[0004] Preferably, the electric lifting device includes a reduction motor, a screw, a limit switch and a lifting switch, the reduction motor is meshed with the screw, the top end of the screw is fixedly connected to one end of the lower surface of the air inlet cover, and the limit switch and the lifting switch are respectively connected to the reduction motor.

[0005] In order to ensure that the oncoming wind blowing toward the air inlet cover plate can smoothly enter the silencer cavity, preferably, the electric lifting device controls the maximum opening angle of the air inlet cover plate to be no greater than 45°.

[0006] Since the lower part of the air inlet cover plate is in a hollow state, in order to ensure that the air inlet cover plate has sufficient load strength and prevent the air inlet cover plate from being deformed when people walk, preferably, the air inlet cover plate is made of a stainless steel patterned steel plate.

[0007] Preferably, a 50 mm sound absorbing layer is provided on the lower surface of the air inlet cover plate, and the sound absorbing material of the sound absorbing layer is the same as the sound absorbing material in the sound absorbing hole.

[0008] Preferably, the bottom of the silencer chamber is connected to the bottom silencer via a second flange.

[0009] Beneficial effects: The present invention discloses an underground type windward silencer. Compared with the existing silencer, the present invention has the following characteristics: (1) From the perspective of floor space: the present invention is located below the floor of the silencer room and does not occupy the space inside the silencer room; (2) From the perspective of silencer effect: the present invention makes silencer improvements at the air inlet cover plate and in the silencer chamber respectively, and the entire silencer has a simple structure and good silencer effect; (3) From the perspective of silencer cost, when the silencer effect does not achieve the expected effect, there is no need to expand the volume of the silencer room, thereby reducing the silencer cost of the entire silencer room. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the underground type windward silencer;

[0011] In the figure: 1, air inlet cover plate 2, silencing chamber 21, silencing hole 3, silencing chamber floor 4, first flange 5, second flange Specific implementation plan

[0012] In order to deepen the understanding of the present invention, the present invention is further described in detail below in conjunction with embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0013] like Figure 1 As shown, a hidden windward silencer comprises an air inlet cover plate 1 and a silencer chamber 2 located below the air inlet cover plate 1, wherein the air inlet cover plate 1 is connected to an electric lifting device (not shown in the figure), and the electric lifting device comprises a reduction motor (not shown in the figure), a screw rod (not shown in the figure), a limit switch (not shown in the figure) and a lifting switch (not shown in the figure), wherein the reduction motor is meshed with the screw rod, and the top end of the screw rod is fixedly connected to one end of the lower surface of the air inlet cover plate, and the limit switch and the lifting switch are respectively connected to the reduction motor, and in order to ensure that the oncoming wind blowing toward the air inlet cover plate 1 can smoothly enter the silencer chamber 2, the electric lifting device controls the maximum opening angle of the air inlet cover plate 1 to be no greater than 45°.

[0014] In order to ensure that the air inlet cover plate 1 has sufficient load strength and prevent the air inlet cover plate 1 from being deformed when people walk, the air inlet cover plate 1 is made of stainless steel patterned steel plate. The upper surface of the air inlet cover plate 1 is flush with the floor 3 of the silencing chamber, and the lower surface of the air inlet cover plate 1 is connected to the silencing chamber 2 through the first flange 4 and the connecting pipe (not shown in the figure). The connecting pipe is located in the silencing chamber 2. The inner wall of the silencing chamber 2 is provided with a silencing hole 21 ( Figure 1 Only the silencer holes in a part of the silencer cavity are shown in the figure, and the silencer holes 21 are filled with silencer materials.

[0015] In order to further improve the silencing performance of the present invention, further improvements are made: (1) a 50 mm thick sound absorbing layer is provided on the lower surface of the air inlet cover plate 1, and the sound absorbing material of the sound absorbing layer is the same as the sound absorbing material in the silencing hole 21; (2) the bottom of the silencing cavity 2 is connected to the bottom silencer (not shown in the figure) through the second flange 5.

[0016] Working conditions: When the silencing effect in the silencing room needs to be enhanced, the operator controls the reduction motor to drive the screw through the lifting switch. At this time, the air inlet cover plate 1 flips toward the wind direction of the oncoming wind. The oncoming wind is affected by the air inlet cover plate 1, and the wind direction changes, and begins to flow into the silencing chamber 2 under the air inlet cover plate 1, and completes the silencing work under the action of the silencing hole 21, thereby achieving the purpose of enhancing the silencing effect. When the air inlet cover plate 1 rotates to the maximum rotation angle (45°), the limit switch makes feedback control to control the reduction motor to stop rotating, so as to avoid the phenomenon of excessive flipping of the air inlet cover plate 1.

[0017] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ground-mounted windward silencing device, comprising an air inlet cover plate and a silencing chamber located below the air inlet cover plate, characterized in that: The air inlet cover is connected to the electric lifting device, the upper surface of the air inlet cover is flush with the floor of the silencing chamber, the lower surface of the air inlet cover is connected to the silencing chamber through a first flange and a connecting pipe, the connecting pipe is located in the silencing chamber, the inner wall of the silencing chamber is provided with a silencing hole, and the silencing hole is provided with a silencing material; The electric lifting device includes a reduction motor, a screw, a limit switch and a lifting switch, wherein the reduction motor is meshed with the screw, the top end of the screw is fixedly connected to one end of the lower surface of the air inlet cover plate, and the limit switch and the lifting switch are respectively connected to the reduction motor; A 50 mm sound absorbing layer is provided on the lower surface of the air inlet cover plate, and the sound absorbing material of the sound absorbing layer is the same as the sound absorbing material in the sound absorbing hole.

2. An electric lifting device according to claim 1, characterized in that: The electric lifting device controls the maximum opening angle of the air inlet cover to be no greater than 45°.

3. The underground type windward silencing device according to claim 1, characterized in that: The air inlet cover is made of stainless steel patterned steel plate.

4. The underground type windward silencing device according to claim 1, characterized in that: The bottom of the silencer chamber is connected to the bottom silencer through a second flange.

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