Laboratory waste gas capturing device

Abstract

The utility model discloses a laboratory waste gas capturing device which comprises a box body with a gas inlet and a gas outlet, a suppression pipe used for concentrating noise generated when waste gas flows from the gas inlet to the gas outlet is arranged in the box body, and a suppression cavity for containing a noise suppression mechanism is formed in the suppression pipe. The two ends of the suppression cavity are communicated with the air inlet and the air outlet respectively to form corresponding cavity openings, and the noise suppression mechanism forms a noise reduction channel capable of reflecting noise for multiple times and absorbing sound energy in the suppression cavity; according to the utility model, noise generated when waste gas flows can be suppressed, so that the influence on experimenters is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of hazardous gas treatment equipment, and in particular to a laboratory waste gas capture device. Background Technology

[0002] In chemical experiments, various solutions or reagents are used, which may release toxic fumes. If inhaled, these fumes can cause discomfort or even endanger the lives of laboratory personnel. Therefore, it is necessary to remove these toxic fumes in a timely manner.

[0003] In existing technologies, a waste gas capture device is typically installed in the laboratory. This device is connected to an external exhaust fan, which creates negative pressure inside the device. Under this negative pressure, the waste gas is drawn into the capture device and discharged through a pipe. Since the amount of waste gas generated in different experimental areas within the laboratory varies, the installation location of the waste gas capture device is fixed, typically mounted on the laboratory ceiling. When the amount of waste gas is large, it is necessary to increase the power of the external exhaust fan to enhance the exhaust effect of the capture device. However, this increases the flow velocity of the waste gas inside the capture device, resulting in increased noise and noise pollution, which seriously affects the normal experiments conducted by laboratory personnel. Utility Model Content

[0004] The purpose of this invention is to provide a laboratory exhaust gas capture device that can suppress the noise generated when exhaust gas flows, thereby reducing the impact on laboratory personnel.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A laboratory exhaust gas capture device includes a housing with an air inlet and an exhaust outlet. The housing is provided with a noise suppression tube for concentrating the noise generated when the exhaust gas flows from the air inlet to the exhaust outlet. The noise suppression tube forms a suppression cavity that houses a noise suppression mechanism. The two ends of the suppression cavity are respectively connected to the air inlet and the exhaust outlet to form corresponding openings. The noise suppression mechanism forms a sound-absorbing channel in the suppression cavity that can reflect noise multiple times and absorb sound energy.

[0007] Based on the above technical solution, the present invention can be improved as follows:

[0008] Furthermore, the noise suppression mechanism includes support plates disposed at the two openings of the suppression cavity, at least two suppression plates disposed between the two support plates, a silencing channel formed between two adjacent suppression plates, a vent on the support plate communicating with the silencing channel, and multiple reflective surfaces formed on the suppression plate that can reflect noise propagating in the silencing channel and deform to absorb sound energy after being subjected to sound pressure.

[0009] Furthermore, the suppression plate is a wavy suppression plate, and a wavy noise-absorbing channel is formed between two adjacent suppression plates. The top and bottom surfaces of the suppression plate serve as reflective surfaces. The reflective surface of one suppression plate at the crest of the wave is opposite to the reflective surface of the adjacent suppression plate at the trough of the wave. Noise can be reflected from the reflective surface at the trough of one suppression plate to the reflective surface at the trough of the adjacent suppression plate.

[0010] Furthermore, the suppression plate is provided with multiple ventilation holes for the passage of exhaust gas.

[0011] Furthermore, a sound insulation cavity is formed between the suppression tube and the main box plate of the box body, and the sound insulation cavity is filled with sound insulation foam material.

[0012] Furthermore, the suppression tube is a one-piece molded tube.

[0013] Furthermore, the outer peripheral surface of the lever is provided with anti-slip texture.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] This invention uses a suppression tube inside the chamber to concentrate the noise generated during the flow of exhaust gas. At the same time, a noise suppression mechanism is housed in the suppression tube. The noise suppression mechanism forms a silencing channel in the suppression cavity inside the suppression tube. The noise propagates within the silencing channel and is reflected and absorbed multiple times, thereby achieving noise suppression and reducing the impact on experimental personnel. Attached Figure Description

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a schematic diagram of the laboratory exhaust gas capture device in the embodiment;

[0018] Figure 2 This is a cross-sectional view of the laboratory exhaust gas capture device in the embodiment;

[0019] Figure 3 This is a schematic diagram of the noise suppression mechanism in the embodiment.

[0020] The markings on the attached diagram are: 1-box body, 2-air inlet, 3-exhaust outlet, 4-inspection door, 5-suppression pipe, 6-sound insulation foam, 7-support plate, 8-suppression plate, 9-ventilation hole. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. These descriptions are intended to aid in understanding the utility model but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] See Figures 1 to 3 This embodiment relates to a laboratory exhaust gas capture device, including a housing 1 and a noise suppression mechanism disposed inside the housing 1 to suppress noise; the housing 1 has an air inlet 2 and an exhaust outlet 3, the air inlet 2 is used to draw in exhaust gas, and the exhaust outlet 3 is used to connect to an external air extraction device; the air extraction device is used to exhaust the gas inside the housing 1; the exhaust gas in the laboratory enters the housing 1 from the air inlet 2, flows through the noise suppression mechanism inside the housing 1, and is discharged from the exhaust outlet 3 of the housing 1, and the noise generated during the flow of exhaust gas is suppressed by the noise suppression mechanism.

[0023] Specifically, the housing 1 has a rectangular structure, including four main panels and two side panels that are spliced ​​together. One of the main panels has an inspection port and an inspection door 4 that can be opened and closed at the inspection port. One of the side panels has an air inlet 2 and the other side panel has an exhaust port 3. A suppression pipe 5 is installed inside the housing 1, and the axis of the suppression pipe 5 is parallel to the length direction of the housing 1. A sound insulation cavity is formed between the suppression pipe 5 and the four main panels of the housing. The sound insulation cavity is filled with sound insulation foam material. In this embodiment, the sound insulation foam material is the sound insulation foam sponge 6 in the prior art, so as to block the transmission of noise and thus prevent noise from spreading from the inside of the housing 1 to the outside. A suppression cavity is formed inside the suppression pipe 5. A noise suppression mechanism is fixedly installed in the suppression cavity and can form a silencing channel in the suppression cavity to suppress noise. The two ends of the suppression cavity are respectively connected to the air inlet 2 and the exhaust port 3 of the housing 1, so that the exhaust gas can enter the suppression cavity of the suppression pipe 5 and flow through the noise suppression mechanism.

[0024] It should be noted that during installation, the main box panel and side box panels are first assembled into box 1, and then the suppression tube 5 and noise suppression mechanism are installed. In this embodiment, the suppression tube 5 adopts an integrated molding structure, which, compared with the segmented structure, can avoid the formation of splicing seams and ensure the airtightness of the suppression tube 5. In this embodiment, the suppression tube 5 is a tube with a circular cross-section. Correspondingly, a circular tube-shaped sound insulation cavity is formed inside the suppression tube 5. The circular tube-shaped noise cavity can concentrate the noise in the middle of the suppression cavity, so that the noise suppression mechanism can concentrate and suppress the noise. According to actual needs, a tube with a rectangular cross-section can also be used instead.

[0025] The noise suppression mechanism includes two support plates 7 and at least two suppression plates 8. The two support plates 7 are respectively set at the two openings of the suppression cavity inside the suppression tube 5. The suppression plates 8 are fixedly connected between the two support plates 7, and a silencing channel is formed between two adjacent suppression plates 8. The support plates 7 are provided with vents that communicate with the silencing channel, so that the exhaust gas can flow from the air inlet 2 to the exhaust outlet 3 of the housing 1 along the silencing channel in the suppression cavity. The noise generated during the flow of exhaust gas propagates in the silencing channel. Multiple continuous reflective surfaces are formed on the suppression plates 8. During the propagation of noise, the noise is reflected multiple times between the reflective surfaces on two adjacent suppression plates 8, and noise suppression is achieved by absorbing sound energy during reflection.

[0026] In this embodiment, four suppression plates 8 are provided, correspondingly forming three noise reduction channels. The number of suppression plates 8 can be increased according to actual needs. In this embodiment, the suppression plates 8 are wavy, and wavy noise reduction channels are formed between two adjacent suppression plates 8 to reduce the resistance encountered by the exhaust gas flow. The top and bottom surfaces of the three suppression plates 8 serve as reflective surfaces, with the reflective surface of one suppression plate 8 at the crest facing the reflective surface of the adjacent suppression plate 8 at the trough. Noise is reflected from the reflective surface at the trough of one suppression plate 8 to the reflective surface at the trough of the adjacent suppression plate 8, and so on, reflecting multiple times. The reflective surface at the trough of the suppression plate 8 deforms accordingly after bearing the sound pressure of each noise reflection to absorb sound energy. As the number of reflections increases, the sound energy decreases accordingly, thereby suppressing noise.

[0027] Multiple ventilation holes 9 are provided on the suppression plate 8. The ventilation holes 9 allow exhaust gas to flow through, which not only reduces the exhaust gas flow rate and noise generation, but also reduces the pressure on the suppression plate 8 when the exhaust gas flows, effectively preventing the suppression plate 8 from deforming prematurely under air pressure and thus reducing the amount of sound energy absorbed.

[0028] In this embodiment, the suppression plate 8 is a wavy suppression plate 8. Depending on the actual situation, a serrated printed circuit board can also be used instead. In this embodiment, the suppression plate 8 is made of rubber. Depending on the actual situation, other elastic materials can also be used instead.

[0029] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A laboratory exhaust gas capture device, comprising a housing having an inlet and an outlet, characterized in that, The housing is equipped with a noise suppression pipe for concentrating the noise generated when exhaust gas flows from the inlet to the outlet. The inside of the noise suppression pipe forms a suppression cavity for accommodating the noise suppression mechanism. The two ends of the suppression cavity are respectively connected to the inlet and the outlet to form corresponding openings. The noise suppression mechanism forms a sound-absorbing channel in the suppression cavity that can reflect noise multiple times and absorb sound energy.

2. The laboratory waste gas capture device according to claim 1, characterized in that, The noise suppression mechanism includes support plates disposed at the two openings of the suppression cavity, at least two suppression plates disposed between the two support plates, and a silencing channel formed between two adjacent suppression plates. The support plates are provided with vents communicating with the silencing channel, and the suppression plates are formed with multiple reflective surfaces that can reflect noise propagating in the silencing channel and deform to absorb sound energy after being subjected to sound pressure.

3. The laboratory waste gas capture device according to claim 2, characterized in that, The suppression plate is a wave-shaped suppression plate, and a wave-shaped noise reduction channel is formed between two adjacent suppression plates. The top and bottom surfaces of the suppression plate serve as reflective surfaces. The reflective surface of one suppression plate at the crest of the wave is opposite to the reflective surface of the adjacent suppression plate at the trough of the wave. Noise can be reflected from the reflective surface at the trough of one suppression plate to the reflective surface at the trough of the adjacent suppression plate.

4. The laboratory waste gas capture device according to claim 3, characterized in that, The suppression plate is provided with multiple ventilation holes for the flow of exhaust gas.

5. The laboratory exhaust gas capture device according to any one of claims 1-4, characterized in that, A sound insulation cavity is formed between the suppression tube and the main box plate of the box body, and the sound insulation cavity is filled with sound insulation foam material.

6. The laboratory waste gas capture device according to claim 5, characterized in that, The suppression tube is a one-piece molded tube.

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