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CN-224231183-U - Smoke type airtight door air tightness detection device

CN224231183UCN 224231183 UCN224231183 UCN 224231183UCN-224231183-U

Abstract

The utility model relates to the field of air tightness detection, in particular to an air tightness detection device for a smoke type airtight door, which comprises an outer sealing cover and an inner sealing cover which are arranged on two sides of a door frame wall and are fixed with the door frame wall in an adsorption mode, wherein a positive pressure sealing cavity is formed by enclosing among the outer sealing cover, the door frame wall and an airtight door on the door frame wall, an air source and a micro-manometer are communicated with the positive pressure sealing cavity, the positive pressure sealing cavity is also connected with a smoke generator for generating smoke, a negative pressure sealing cavity is formed by enclosing among the inner sealing cover, the door frame wall and the airtight door, and the negative pressure sealing cavity is vacuumized by a vacuum pump. 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 smoke type airtight door air tightness detection device is characterized by comprising an outer sealing cover (6) and an inner sealing cover (7) which are arranged on two sides of a door frame wall (2) in a covering mode and are fixed with the door frame wall (2) in an absorbing mode, a positive pressure sealing cavity is formed by enclosing between the outer sealing cover (6), the door frame wall (2) and an airtight door (1) on the door frame wall (2), an air source (4) and a micro-manometer (5) are communicated with the positive pressure sealing cavity, the positive pressure sealing cavity is further connected with a smoke generator (9) used for generating smoke, a negative pressure sealing cavity is formed by enclosing between the inner sealing cover (7), the door frame wall (2) and the airtight door (1), and the negative pressure sealing cavity is vacuumized through a vacuum pump (72).
  2. 2. The smoke type airtight door airtight detection device according to claim 1, wherein cameras (71) are fixed on one sides of the inner sealing cover (7) adjacent to the airtight door (1), and after the shooting ranges of the cameras (71) are crossed, a gap area between the airtight door (1) and the door frame wall (2) is covered.
  3. 3. The smoke-type airtight door airtightness detection apparatus according to claim 1, wherein the inner seal cover (7) is a transparent cover body.
  4. 4. A smoke type airtight door air tightness detection device according to any one of claims 1-3, characterized in that sealing strips (8) are arranged at contact surfaces of an outer sealing cover (6) and an inner sealing cover (7) and a door frame wall (2), the sealing strips (8) comprise outer sealing strips and inner sealing strips positioned on inner rings of the outer sealing strips, a negative pressure cavity is formed by encircling the outer sealing strips and the inner sealing strips, and negative pressure connectors (81) for vacuumizing the negative pressure cavity are arranged on the outer sealing cover (6) and the inner sealing cover (7).
  5. 5. The smoke type airtight door air tightness detection device according to any one of claims 1-3 is characterized in that an air source pipeline (45) communicated with an air source (4) is pre-buried on an outer 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 air conveying direction, and a pressure measuring pipe (51) connected with a micro-pressure gauge (5) is pre-buried on the outer sealing cover (6).
  6. 6. The smoke-type airtight door airtightness detection device according to claim 5, wherein the smoke generator (9) is an ice drier, and an exhaust pipe of the ice drier is communicated with the air source pipeline (45).
  7. 7. The smoke type airtight door air tightness detection device according to claim 6, wherein the pipe orifice of the air source pipeline (45) corresponds to the central point of the airtight door (1), a diffusion disc (3) is coaxially fixed at the pipe orifice of the air source pipeline (45) in the positive pressure airtight cavity, the axis of the diffusion disc (3) is arranged along the direction vertical to the airtight door (1), diffusion joints (31) are uniformly arranged in the diffusion disc (3) along the radial direction, and exhaust gas of the air source pipeline (45) is uniformly diffused into the positive pressure airtight cavity through the diffusion joints (31) of the diffusion disc (3).

Description

Smoke type airtight door air tightness detection device Technical Field The utility model relates to the field of air tightness detection, in particular to an air tightness detection device for a smoke type airtight door. 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 a smoke type airtight door air tightness detection device. 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 smoke airtight door air tightness detection device comprises an outer sealing cover and an inner sealing cover which are arranged on two sides of a door frame wall and fixed with the door frame wall in an adsorption mode, wherein a positive pressure sealing cavity is formed by enclosing among the outer sealing cover, the door frame wall and an airtight door on the door frame wall, an air source and a micro-manometer are communicated with the positive pressure sealing cavity, the positive pressure sealing cavity is also connected with a smoke generator for generating smoke, a negative pressure sealing cavity is formed by enclosing among the inner sealing cover, the door frame wall and the airtight door, and the negative pressure sealing cavity is vacuumized through a vacuum pump. As a further scheme of the utility model, cameras are fixed on one sides of the inner sealing covers adjacent to the airtight doors, and the gap areas between the airtight doors and the door frame wall are covered after the shooting ranges of the cameras are crossed. As a still further proposal of the utility model, the inner sealing cover is a transparent cover body. As a still further scheme of the utility model, sealing strips are arranged at the contact surfaces of the outer sealing cover and the inner sealing cover with the door frame wall, the sealing strips comprise 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 negative pressure connectors for vacuumizing the negative pressure cavity are arranged on the outer sealing cover and the inner sealing cover. As a still further scheme of the utility model, an air source pipeline communicated with an air source is pre-embedded on the outer sealing cover, an air source regulating valve, a pressure gauge, a flow regulating valve and a flowmeter are sequentially arranged on the air source pipeline along the air conveying direction, and a pressure measuring pipe connected with the micro-pressure gauge is pre-embedded on the outer sealing cover. As a still further proposal of the utility model, the smoke generator is an ice drier, and the exhaust pipe of the ice drier is communicated with the air source pipeline. As a still further proposal of the utility model, the pipe orifice of the air source pipeline corresponds t