Table top type pressure stabilizing and flow equalizing device

Abstract

The utility model discloses a table top type pressure stabilizing and flow equalizing device which comprises an air inlet box with a negative pressure cavity formed inside, an air inlet hole is formed in the air suction face of the air inlet box, and an air outlet and an exhaust pipe connected with the air outlet are arranged at the top of the air inlet box. A noise reduction mechanism is arranged at the air outlet and comprises a supporting frame, a plurality of elastic noise reduction plates are arranged on the supporting frame and arranged in the length direction of the supporting frame at equal intervals, and an exhaust channel allowing air to circulate is formed between every two adjacent elastic noise reduction plates. According to the utility model, the flow rate of gas can be slowed down, and noise generated when the gas flows is reduced, so that interference to experimenters is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory waste gas uniform flow emission equipment, in particular to a tabletop voltage stabilizing and uniform flow device. Background Art

[0002] At present, the waste gas emission in the laboratory generally adopts a ceiling fan for emission. This emission method requires the waste gas to rise before it can be discharged, and only a part of the waste gas in the laboratory space can be discharged. During the experiment, the experimenters generally stand or sit beside the experimental table. The waste gas generated during the operation will evaporate and rise, and it is easy to be inhaled by the operator, causing harm. At the same time, some of the laboratory waste gas is toxic gas heavier than air. This kind of toxic gas with a relatively large specific gravity is at a lower position in the laboratory and is easy to remain on the experimental table and difficult to be discharged by the ceiling fan. For example, formaldehyde. In order to solve this technical problem, a desktop uniform flow device has appeared in the prior art, and the waste gas on and near the experimental table is directly discharged through this uniform flow device. However, when exhausting gas, the gas flow is relatively fast, which is easy to generate relatively large noise, and the uniform flow device is relatively close to the experimenters, and the noise is easy to interfere with the experimenters' experimental operations, resulting in a decrease in concentration and affecting the progress of the experiment. Content of the Utility Model

[0003] The purpose of the utility model is to provide a tabletop voltage stabilizing and uniform flow device, which can slow down the gas flow rate and reduce the noise generated when the gas flows, thereby reducing the interference to the experimenters.

[0004] The purpose of the utility model is realized through the following technical solutions:

[0005] A tabletop voltage stabilizing and uniform flow device includes an air inlet box with a negative pressure chamber formed inside. The air inlet box is provided with air inlet holes on the air suction surface, and an air outlet and an exhaust pipe connected to the air outlet are arranged at the top of the air inlet box. A noise reduction mechanism is arranged at the air outlet. The noise reduction mechanism includes a support frame, and a plurality of elastic noise reduction plates are arranged on the support frame. The elastic noise reduction plates are arranged at equal intervals along the length direction of the support frame, and an exhaust channel for gas to flow through is formed between adjacent two elastic noise reduction plates.

[0006] On the basis of the above technical solutions, the utility model can be improved as follows:

[0007] Further, the elastic noise reduction plates are inclined and arranged inside the support frame.

[0008] Further, a plurality of air cavities are uniformly arranged inside the elastic noise reduction plates, and pressure relief holes communicating with the air cavities are arranged on the windward side of the elastic noise reduction plates.

[0009] Further, the diameter of the pressure relief holes is smaller than the diameter of the air cavities.

[0010] Further, a first annular edge for cooperating with the air outlet is provided on the bottom surface of the support frame, and a second annular edge for cooperating with the port of the exhaust pipe is provided on the top surface of the support frame.

[0011] Further, sealing rubber strips are provided between the first annular edge and the air outlet, and between the second annular edge and the port of the exhaust pipe.

[0012] Compared with the prior art, the present utility model has the following advantages:

[0013] In the present utility model, a noise reduction mechanism is provided at the air outlet of the air inlet box. The noise reduction mechanism includes a support frame and a plurality of elastic noise reduction plates. The elastic noise reduction plates are arranged at equal intervals along the length direction of the support frame. An exhaust passage for gas to flow through is formed between two adjacent elastic noise reduction plates. When exhausting gas, the gas is divided into multiple airflows by the plurality of elastic noise reduction plates, thereby slowing down the gas flow rate, reducing the noise generated during gas flow, and reducing the interference to the experimenters. Description of the Drawings

[0014] The following further describes the present utility model in detail with reference to the drawings and specific embodiments.

[0015] Figure 1 It is a structural schematic diagram of the tabletop voltage stabilizing and current equalizing device in the utility model;

[0016] Figure 2 It is a structural schematic diagram of the noise reduction mechanism in the utility model;

[0017] Figure 3 It is a structural schematic diagram of the elastic noise reduction plate in the utility model.

[0018] Marks on the drawings: 1 - air inlet box, 2 - exhaust pipe, 3 - air inlet hole, 4 - air outlet, 5 - support frame, 6 - elastic noise reduction plate, 601 - air cavity, 602 - pressure relief hole, 7 - first annular edge, 8 - second annular edge. Specific Embodiments

[0019] The following further describes the specific embodiments of the present utility model with reference to the drawings. The description of these embodiments is used to help understand the present utility model, but does not limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0020] See Figures 1 to 3, the utility model relates to a tabletop voltage-stabilizing and current-sharing device, which includes an air inlet box 1 and an exhaust pipe 2 that are interconnected. The air inlet box 1 is installed on the experimental tabletop. The air inlet box 1 has an air inlet hole 3 and an air outlet 4; the end of the exhaust pipe 2 is connected to an external fan; when the external fan is started, a negative pressure is formed inside the exhaust pipe 2 and the air inlet box 1. Under the action of the negative pressure, the gas near the experimental tabletop and its vicinity is sucked into the air inlet box 1 through the air inlet hole 3, and then passes through the air inlet box 1 and the exhaust pipe 2 in sequence and is discharged out of the laboratory; a noise reduction mechanism is provided at the air outlet 4, and the noise reduction mechanism is used to reduce the noise generated when the gas flows.

[0021] Specifically, the air inlet box 1 is a rectangular box structure. A negative pressure chamber is formed inside the air inlet box 1. One side surface of the air inlet box 1 is the suction surface; when the air inlet box 1 is installed on the experimental tabletop, the suction surface of the air inlet box 1 faces the experimenter; the air inlet box 1 is provided with a plurality of air inlet holes 3 communicating with the negative pressure chamber on the suction surface; the air inlet box 1 is provided with an air outlet 4 communicating with the negative pressure chamber at the top; the noise reduction mechanism has an air inlet end and an air outlet end. The air inlet end of the noise reduction mechanism is connected to the air outlet 4 of the air inlet box 1, and the air outlet end of the noise reduction mechanism is connected to the exhaust pipe 2; during exhaust, the gas near the experimental tabletop enters the air inlet box 1 through the air inlet. After flowing and changing direction in the negative pressure chamber inside the air inlet box 1, it passes through the noise reduction mechanism at the air outlet 4 at the top of the air inlet box 1 to reduce the noise, and then enters the exhaust pipe 2 to be discharged out of the laboratory; in this embodiment, the air outlet 4 is rectangular, and the exhaust pipe 2 is a rectangular pipe structure.

[0022] The noise reduction mechanism includes a support frame 5 and an elastic noise reduction plate 6 arranged on the support frame 5; the support frame 5 is a rectangular ring-shaped frame structure. The bottom surface of the support frame 5 is the air inlet end and is provided with a first annular edge 7, and the top surface of the support frame 5 is the air outlet end and is provided with a second annular edge 8; during assembly, the first annular edge 7 of the support frame 5 cooperates with the top air outlet 4 of the air inlet box 1 and is locked by screws on the peripheral side, and the second annular edge 8 of the support frame 5 cooperates with the port of the exhaust pipe 2 and is locked by screws on the peripheral side.

[0023] Sealing rubber strips (not shown in the drawings) are provided between the first annular edge 7 and the air outlet 4 of the air inlet box 1 and between the second annular edge 8 and the port of the exhaust pipe 2 to increase the airtightness and prevent gas leakage.

[0024] A plurality of elastic noise reduction plates 6 are provided and are arranged at equal intervals along the length direction of the support frame 5 inside the support frame 5. An exhaust channel for gas to flow through is formed between adjacent two elastic noise reduction plates 6; during exhaust, the gas is divided into multiple airflows by the plurality of elastic noise reduction plates 6, thereby slowing down the gas flow rate and reducing the noise generated when the gas flows.

[0025] The elastic noise reduction plate 6 is inclined and arranged inside the support frame 5 to increase the contact area between the elastic noise reduction plate 6 and the gas, and further buffer the gas; wherein, one plate surface of the elastic noise reduction plate 6 in contact with the gas is the windward surface, and the other plate surface of the elastic noise reduction plate 6 not in contact with the gas is the leeward surface.

[0026] The elastic noise reduction plate 6 is made of rubber material. A plurality of air cavities 601 are uniformly arranged inside the elastic noise reduction plate 6. A pressure relief hole 602 communicating with the air cavities 601 is arranged on the leeward surface of the elastic noise reduction plate 6. The diameter of the pressure relief hole 602 is smaller than the diameter of the air cavities 601; when the gas contacts the elastic noise reduction plate 6, the windward surface of the elastic noise reduction plate 6 is bent by the force, and the air cavities 601 inside the elastic noise reduction plate 6 are correspondingly compressed, and the gas inside the air cavities 601 is discharged through the pressure relief hole 602, so as to realize the buffering of the gas; after the gas passes through the elastic noise reduction plate 6, under the action of its own elastic force, the windward surface of the elastic noise reduction plate 6 returns to be flat, and air is inhaled through the pressure relief hole 602 to make the air cavities 601 return to their original state.

[0027] The above embodiments of the present invention do not limit the protection scope of the present invention. The implementation manners of the present invention are not limited thereto. All kinds of modifications, substitutions or changes made to the above structure of the present invention according to the above content of the present invention, in accordance with the common general knowledge and conventional means in the art, without departing from the above basic technical idea of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A tabletop voltage stabilizing and current equalizing device, comprising an air inlet box with a negative pressure chamber formed inside. The air inlet box is provided with air inlet holes on the air suction surface, and an air outlet and an exhaust pipe connected to the air outlet are arranged at the top of the air inlet box; it is characterized in that, A noise reduction mechanism is provided at the air outlet. The noise reduction mechanism includes a support frame, and a plurality of elastic noise reduction plates are arranged on the support frame. The elastic noise reduction plates are arranged at equal intervals along the length direction of the support frame, and an exhaust passage for gas to flow through is formed between two adjacent elastic noise reduction plates.

2. The tabletop voltage stabilizing and current equalizing device according to claim 1, wherein The elastic noise reduction plates are inclined and arranged inside the support frame.

3. The tabletop voltage stabilization and current sharing device according to claim 2, characterized in that, A plurality of air cavities are evenly arranged inside the elastic noise reduction plates, and pressure relief holes communicating with the air cavities are arranged on the leeward side of the elastic noise reduction plates.

4. The tabletop voltage stabilizing and current equalizing device according to claim 3, wherein The diameter of the pressure relief holes is smaller than the diameter of the air cavities.

5. The tabletop voltage stabilizing and current sharing device according to any one of claims 1-4, characterized in that, A first annular edge for cooperating with the air outlet is arranged on the bottom surface of the support frame, and a second annular edge for cooperating with the port of the exhaust pipe is arranged on the top surface of the support frame.

6. The tabletop voltage stabilizing and current equalizing device according to claim 5, characterized in that, Sealing rubber strips are arranged between the first annular edge and the air outlet, and between the second annular edge and the port of the exhaust pipe.

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