CN-224231371-U - Sampling membrane clamp

Abstract

The utility model discloses a sampling film clamp, which comprises a film support for placing a sampling film and a film cover for pressing the sampling film on the film support, wherein the film support comprises a ventilation surface and a side wall, the ventilation surface comprises a ventilation part and a sealing part, and a sealing ring I is arranged on the sealing part. The membrane cover comprises a first contact surface and a second contact surface, the first contact surface is matched with the side wall, the second contact surface is matched with the sealing part and is opposite to the first sealing ring, the second sealing ring is arranged on the second contact surface or the first contact surface or the side wall, the first sealing ring is matched with the second sealing ring, the upper surface and the lower surface of the sampling membrane can be sealed, and the problem that measurement data are inaccurate due to the fact that gas bypasses the sampling membrane is prevented. The technical scheme has the advantages of simple structure, good sealing effect and low manufacturing cost.

Inventors

• WANG JINGLEI
• XU HAIBO
• FANG YUYU
• WANG HUI
• YU FEI
• LIU SHIBO
• WANG TAO
• FANG LIHONG
• WU JUNYANG
• XIONG BINGYAN
• ZHAO RAN
• ZHI KANGBO

Assignees

• 杭州微智兆智能科技有限公司

Dates

Publication Date

20260512

Application Date

20250516

Claims (7)

1. 1. A sampling membrane clamp comprises a membrane support (1), a membrane cover (2) and a first sealing ring (4), wherein a sampling membrane is arranged between the membrane support (1) and the membrane cover (2), and the sampling membrane clamp is characterized in that the membrane support (1) comprises a ventilation surface (11) and a side wall (12), the ventilation surface (11) comprises a ventilation part (111) and a sealing part (112), the sealing part (112) is arranged on the outer side of the ventilation part (111), the side wall (12) is arranged on the outer side of the sealing part (112), and the first sealing ring (4) is arranged on the sealing part (112); The film cover (2) comprises a first contact surface (21) and a second contact surface (22), the first contact surface (21) is matched with the side wall (12), and the second contact surface (22) is matched with the sealing part (112) and is opposite to the first sealing ring (4); the sealing device further comprises a second sealing ring (5), and the second sealing ring (5) is arranged on the second contact surface (22).
2. 2. The sampling film holder according to claim 1, further comprising a sampling film (3), wherein the sampling film (3) comprises a ventilation portion (31) and a fixing portion (32), the ventilation portion (31) is matched with the ventilation surface (11), and the fixing portion (32) is located between the second contact surface (22) and the sealing portion (112).
3. 3. The sampling membrane clamp of claim 1, further comprising a first sealing groove (6) and a second sealing groove (7), wherein the first sealing ring (4) is arranged in the first sealing groove (6), the second sealing ring (5) is arranged in the second sealing groove (7), the first sealing ring (4) is in interference fit with the first sealing groove (6), and the second sealing ring (5) is in interference fit with the second sealing groove (7).
4. 4. A sampling membrane clamp comprises a membrane support (1), a membrane cover (2) and a first sealing ring (4), wherein a sampling membrane is arranged between the membrane support (1) and the membrane cover (2), and is characterized in that the membrane support (1) comprises a ventilation surface (11) and a side wall (12), the ventilation surface (11) comprises a ventilation part (111) and a sealing part (112), the sealing part (112) is arranged on the outer side of the ventilation part (111), the side wall (12) is arranged on the outer side of the sealing part (112) and is in sealing connection with the ventilation surface (11), and the first sealing ring (4) is arranged on the sealing part (112); The film cover (2) comprises a first contact surface (21) and a second contact surface (22), the first contact surface (21) is matched with the side wall (12), and the second contact surface (22) is matched with the sealing part (112) and is opposite to the first sealing ring (4); the sealing device further comprises a second sealing ring (5), wherein the second sealing ring (5) is arranged on the first contact surface (21) or the side wall (12) so that the first contact surface (21) is in sealing connection with the side wall (12).
5. 5. The sampling membrane clip of claim 4, wherein the venting surface (11) is integrally formed with the sidewall (12).
6. 6. The sampling film holder according to claim 4, further comprising a sampling film (3), wherein the sampling film (3) comprises a ventilation portion (31) and a fixing portion (32), the ventilation portion (31) is matched with the ventilation surface (11), and the fixing portion (32) is located between the second contact surface (22) and the sealing portion (112).
7. 7. The sampling membrane clamp of claim 4, further comprising a first sealing groove (6), a second sealing groove (7), wherein the first sealing ring (4) is arranged in the first sealing groove (6), the second sealing ring (5) is arranged in the second sealing groove (7), the first sealing ring (4) is in interference fit with the first sealing groove (6), and the second sealing ring (5) is in interference fit with the second sealing groove (7).

Description

Sampling membrane clamp Technical Field The utility model relates to environment monitoring equipment, in particular to a sampling membrane clamp. Background Air detection refers to the detection of air quality. The quality of the air reflects the concentration of pollutants in the air. Air pollution is a complex phenomenon, and air pollutant concentrations are affected by many factors at specific times and locations. The amplification of man-made pollutant emissions from stationary and mobile pollution sources is one of the most important factors affecting the quality of air, including the exhaust gases of vehicles, ships, airplanes, industrial production emissions, residential life and heating, waste incineration, etc. Urban development density, topography, weather, etc. are also important factors affecting air quality. The method is characterized in that a particulate matter sampler is used for sampling the atmosphere, the atmospheric sample is collected under constant flow, the particulate matters are collected on a filter membrane after the sampled gas passes through the filter membrane, and the concentration of the particulate matters can be obtained by dividing the collected gas volume by the weight gain of the filter membrane before and after the collection. In the sampling process, the round filter membrane is usually placed on a membrane seat, so that the sampling membrane is conveniently loaded and unloaded, and then the filter membrane is sealed between the membrane cover and the membrane support through the cooperation of the membrane cover and the membrane support. However, the existing membrane clamp design cannot realize complete sealing of the membrane cover and the membrane support, so that the problem that measurement data are inaccurate due to the fact that gas bypasses a sampling membrane is caused, and therefore the air tightness of the detection device is insufficient, and the sampling precision is affected. Disclosure of utility model The invention aims to solve the technical problem that detection data are inaccurate due to the fact that a membrane cover and a membrane support cannot be completely sealed in the existing air detection process, and provides a sampling membrane clamp. The utility model realizes the purpose through the following technical scheme that the sampling membrane clamp comprises a membrane support, a membrane cover and a first sealing ring, wherein the sampling membrane is arranged between the membrane support and the membrane cover; the film cover comprises a first contact surface and a second contact surface, the first contact surface is matched with the side wall, and the second contact surface is matched with the sealing part and is opposite to the first sealing ring; The second sealing ring is arranged on the second contact surface. Through set up sealing washer one and sealing washer two on membrane support and membrane lid, with sampling membrane seal in membrane support, membrane lid between, gas can not take place to leak when guaranteeing to sample, the accuracy of data when increasing the sampling. As a further optimization scheme of the utility model, the utility model also comprises a sampling film, wherein the sampling film comprises a ventilation part and a fixing part, the ventilation part is matched with the ventilation surface, and the fixing part is positioned between the second contact surface and the sealing part. As a further optimization scheme of the utility model, the sealing device further comprises a first sealing groove and a second sealing groove, wherein the first sealing ring is arranged in the first sealing groove, the second sealing ring is arranged in the second sealing groove, the first sealing ring is in interference fit with the first sealing groove, and the second sealing ring is in interference fit with the second sealing groove. The utility model provides a sampling membrane presss from both sides, includes membrane support, membrane lid, sealing washer one, is used for setting up the sampling membrane between membrane support and the membrane lid, wherein: the membrane support comprises a ventilation surface and a side wall, wherein the ventilation surface comprises a ventilation part and a sealing part, the sealing part is arranged at the outer side of the ventilation part, the side wall is arranged at the outer side of the sealing part and is in sealing connection with the ventilation surface, and the first sealing ring is arranged on the sealing part; the film cover comprises a first contact surface and a second contact surface, the first contact surface is matched with the side wall, and the second contact surface is matched with the sealing part and is opposite to the first sealing ring; The second sealing ring is arranged on the first contact surface or the side wall, so that the first contact surface is in sealing connection with the side wall. By arranging the second sealing ring on the side wall, the long-time c