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CN-224231182-U - Airtight door gas tightness detection device based on infrared thermal imaging

CN224231182UCN 224231182 UCN224231182 UCN 224231182UCN-224231182-U

Abstract

The utility model relates to the field of air tightness detection, in particular to an airtight door air tightness detection device based on infrared thermal imaging, which comprises a sealing cover which is covered on a door frame wall and is fixed with the door frame wall in an adsorption mode, wherein a negative pressure type sealing cavity is formed by enclosing the sealing cover, the door frame wall and an airtight door on the door frame wall, the sealing cavity is subjected to air suction and pressure reduction through a negative pressure source, a micro-pressure gauge for air pressure monitoring is connected in the sealing cavity, an infrared thermal imager positioned in the sealing cavity is arranged on the sealing cover, and the detection range of the infrared thermal imager covers a gap area between the airtight door and the door frame wall. The utility model greatly shortens the air tightness detection time of the air-tight door of the civil air-tight space, and can accurately check out the leakage points of the air-tight door.

Inventors

  • HUANG HAO
  • Leng Tingfang
  • LI JINYUAN
  • CHU LAI

Assignees

  • 合肥工大共达工程检测试验有限公司

Dates

Publication Date
20260512
Application Date
20250606

Claims (7)

  1. 1. The airtight door air tightness detection device based on the infrared thermal imaging is characterized by comprising a sealing cover (6) which is covered on a door frame wall (2) and is fixed with the door frame wall (2) in an adsorption mode, a negative pressure type sealing cavity is formed by enclosing among the sealing cover (6), the door frame wall (2) and an airtight door (1) on the door frame wall (2), the sealing cavity is subjected to air suction and decompression through a negative pressure source (4), a micro-pressure meter (5) for air pressure monitoring is connected in the sealing cavity, an infrared thermal imager (3) positioned in the sealing cavity is arranged on the sealing cover (6), and a detection range of the infrared thermal imager (3) covers a gap area between the airtight door (1) and the door frame wall (2).
  2. 2. The airtight door air tightness detection device based on infrared thermal imaging according to claim 1, wherein a sealing strip (61) is arranged at the contact surface of the sealing cover (6) and the door frame wall (2), the sealing strip (61) comprises an outer sealing strip and an inner sealing strip positioned at the inner ring of the outer sealing strip, a negative pressure cavity is formed by enclosing the outer sealing strip and the inner sealing strip, and the negative pressure cavity is communicated with a vacuum pump through a negative pressure joint (62) on the sealing cover (6).
  3. 3. The airtight door airtightness detection device based on infrared thermal imaging according to claim 1 or 2, wherein a plurality of groups of infrared thermal imagers (3) are arranged, and the detection ranges of the infrared thermal imagers (3) are crossed to cover a gap area between the airtight door (1) and the door frame wall (2).
  4. 4. The airtight door air tightness detection device based on infrared thermal imaging according to claim 1 or 2, wherein the infrared thermal imaging device (3) is provided with a group, a power source for driving the infrared thermal imaging device (3) to rotate is arranged on the sealing cover (6), the rotation axis of the power source is perpendicular to the door body of the airtight door (1), and the detection range of the infrared thermal imaging device (3) during rotation covers a gap area between the airtight door (1) and the door frame wall (2).
  5. 5. The airtight door air tightness detection device based on infrared thermal imaging according to claim 4 is characterized in that the power source comprises a bearing seat (31) fixed on one side of the airtight door (1) adjacent to the airtight cover (6), a rotating shaft (32) arranged along the direction perpendicular to the airtight door (1) is arranged on the bearing seat (31), an inner magnet (33) is arranged on the rotating shaft (32) in the radial direction, the infrared thermal imager (3) is fixed on the inner magnet (33), an adjusting hand wheel (34) coaxially arranged with the bearing seat (31) is rotatably arranged on one side, far away from the airtight door (1), of the airtight cover (6), an outer magnet (35) in magnetic attraction fit with the inner magnet (33) is fixed on the adjusting hand wheel (34), and the infrared thermal imager (3) synchronously rotates along with the adjusting hand wheel (34) under the magnetic attraction of the inner magnet (33) and the outer magnet (35).
  6. 6. The airtight door tightness detection device based on infrared thermal imaging according to claim 5, wherein the rotating shaft (32), the bearing seat (31) and the adjusting hand wheel (34) are all made of non-magnetic materials.
  7. 7. The airtight door air tightness detection device based on infrared thermal imaging according to claim 1 or 2 is characterized in that an air source pipeline (45) communicated with a negative pressure source (4) is pre-embedded on a sealing cover (6), an air source regulating valve (41), a pressure gauge (42), a flow regulating valve (43) and a flowmeter (44) are sequentially arranged on the air source pipeline (45) along the suction direction of the air source pipeline (45), and a pressure measuring pipe (51) connected with a micro-pressure gauge (5) is pre-embedded on the sealing cover (6).

Description

Airtight door gas tightness detection device based on infrared thermal imaging Technical Field The utility model relates to the field of air tightness detection, in particular to an air tightness detection device of a closed door based on infrared thermal imaging. Background The air tightness of the airtight door of the civil air defense space is of great importance, can prevent toxic gas from penetrating in the war and block the overpressure of shock waves, so that the air tightness of the airtight door needs to be detected and verified in the construction stage, and the leakage quantity meets the national standard under the pressure difference of 50 Pa. At present, the conventional detection means for detecting the air tightness of the airtight door of the civil air-defense space is positive pressure detection, when in detection, the airtight door is closed and locked at first, so that the sealing strip on the airtight door is ensured to be uniformly pressed, air is injected into the civil air-defense space through a detection interface (or temporary drilling hole) reserved in the civil air-defense space, the air is pressurized to a set value, the initial pressure is recorded after the air-defense space is stabilized, the pressure is kept for 5-10 minutes, and whether the pressure drop meets the standard is observed. The positive pressure detection mode has the following problems that 1, because the inside of the civil air defense space is extremely large, a long time is reserved before detection, and the inside of the civil air defense space can reach a set pressure value only by injecting air into the civil air defense space for pressurization, and the time consumption is extremely long, 2, even if the pressure drop in the civil air defense space is detected to be abnormal in the detection stage, a plurality of groups of airtight doors are usually arranged in the civil air defense space, the problem of the airtight state of which area of which airtight door is can not be judged, and the accurate detection can not be carried out, so that the problem needs to be solved. Disclosure of utility model In order to avoid and overcome the technical problems in the prior art, the utility model provides an airtight door air tightness detection device based on infrared thermal imaging. The utility model greatly shortens the air tightness detection time of the air-tight door of the civil air-tight space, and can accurately check out the leakage points of the air-tight door. In order to achieve the above purpose, the present utility model provides the following technical solutions: The airtight door air tightness detection device based on the infrared thermal imaging comprises a sealing cover which is covered on a door frame wall and fixed with the door frame wall in an adsorption mode, wherein a negative pressure type sealing cavity is formed by enclosing among the sealing cover, the door frame wall and an airtight door on the door frame wall, the sealing cavity is subjected to air suction and pressure reduction through a negative pressure source, a micro-pressure meter for air pressure monitoring is connected in the sealing cavity, an infrared thermal imager positioned in the sealing cavity is arranged on the sealing cover, and the detection range of the infrared thermal imager covers a gap area between the airtight door and the door frame wall. As a further scheme of the utility model, the sealing cover and the door frame wall are provided with sealing strips at the contact surface, each sealing strip comprises an outer sealing strip and an inner sealing strip positioned at the inner ring of the outer sealing strip, a negative pressure cavity is formed by enclosing the outer sealing strip and the inner sealing strip, and the negative pressure cavity is communicated with the vacuum pump through a negative pressure joint on the sealing cover. As a still further scheme of the utility model, a plurality of groups of infrared thermal imagers are arranged, and the detection ranges of the infrared thermal imagers are crossed and then cover the gap area between the airtight door and the door frame wall. As a still further scheme of the utility model, the infrared thermal imager is provided with a group, the sealing cover is provided with a power source for driving the infrared thermal imager to rotate, the rotation axis of the power source is vertical to the door body of the airtight door, and the detection range of the infrared thermal imager during rotation covers the gap area between the airtight door and the door frame wall. The infrared thermal imaging device comprises a power source, a sealing cover, an adjusting hand wheel, an outer magnet, an inner magnet, an infrared thermal imaging device and an adjusting hand wheel, wherein the power source comprises a bearing seat fixed on one side of the sealing cover adjacent to a sealing door, a rotating shaft is arranged on the bearing seat along the direction vertical to