CN215338727U - Sealing device for air tightness test of airtight door - Google Patents
Sealing device for air tightness test of airtight door Download PDFInfo
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- CN215338727U CN215338727U CN202121753449.7U CN202121753449U CN215338727U CN 215338727 U CN215338727 U CN 215338727U CN 202121753449 U CN202121753449 U CN 202121753449U CN 215338727 U CN215338727 U CN 215338727U
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Abstract
The utility model provides a sealing device for air tightness test of an airtight door, which comprises an expandable sealing layer fixed on the airtight door; the edge of the sealing layer is arranged on the wall body beside the airtight door through a sealing layer fixing belt and is used for arranging a pressure sealing boundary of the sealing layer on the wall surface; when the air tightness of the airtight door is tested, negative pressure is formed in a sealing cavity formed by the sealing layer, the sealing layer fixing belt and the airtight door through air suction, and the sealing layer seals the airtight door under the action of the negative pressure; and the support part is fixed in the airtight door and used for supporting the sealing layer and preventing the sealing layer from shrinking and deforming under the action of negative pressure. The sealing layer fixing belt limits the boundary of the sealing layer, and fully ensures the sealing performance of the device. The cross rods and the steel wire mesh plate structure are transversely arranged to provide support; negative pressure is formed in the sealed cavity by pumping through the joint by using the negative pressure pump, so that the field implementation process is safer.
Description
Technical Field
The utility model relates to the technical field of nuclear power detection, in particular to a sealing device for air tightness detection of an airtight door.
Background
The airtight door is a suit door integrating air gathering, sound insulation, compression resistance and radiation protection, and is widely applied to industrial and mining enterprises and nuclear power stations. In daily maintenance, the sealing of an air tight door by a common power station or related engineering is only qualitatively required and is not quantitatively examined. In a nuclear power plant or some occasions with strict requirements on sealing effect, the leakage rate of the airtight door is generally required to be quantitatively detected regularly in the routine maintenance process before installation and after use.
The main existing door leaf sealing detection modes mainly comprise the following steps: 1. according to the national standard GB/T7106-2008 classification and detection method for airtight, watertight and wind pressure resistance of building exterior doors and windows, a detection method for measuring leakage rate (namely a constant pressure method) by adjusting gas flow and stabilizing box body gas pressure is adopted. However, this method is not practical for in-service inspection of the airtight door, i.e. real-time inspection of the airtight door that is installed and in use. 2. A scheme for realizing the in-service detection of the sealing performance of an airtight door. According to the scheme, the U-shaped groove is arranged around the door frame and the door leaf of the airtight door, two parallel sealing strips which are connected end to end can be embedded and fixed, and a sealing cavity can be formed when the door is closed. The specially-made airtight door and the matched air tightness detection device realize the supply of nuclear power plants in the Tianwan, and the service condition is reported to be good; however, the scheme is only suitable for a few specially-modified special airtight doors with U-shaped grooves. 3. Closing the airtight door to take the whole airtight chamber as a sealed cavity, pressurizing the room, measuring and calculating the pressure difference after maintaining the pressure for a period of time, substituting the measured pressure difference into parameters such as room volume and the like, and roughly obtaining the pressure difference; this method is also not universally applicable because it is extremely difficult to implement due to many factors including room plumbing, ventilation, etc.
Therefore, none of the above methods is operable for the airtight door to be tested for airtightness already installed in the field. How to construct a sealed cavity for testing is one of the most prominent difficulties.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sealing device for airtight door airtightness inspection, which solves the technical problem that the existing airtight door which is installed on the site cannot be subjected to airtightness inspection.
In one aspect, there is provided a sealing device for air-tightness inspection of an air-tight door, comprising:
an expandable sealing layer secured to the airtight door; the edge of the sealing layer is arranged on the wall body beside the airtight door through a sealing layer fixing belt and is used for arranging a pressure sealing boundary of the sealing layer on the wall surface; when the air tightness of the airtight door is tested, negative pressure is formed in a sealing cavity formed by the sealing layer, the sealing layer fixing belt and the airtight door through air suction, and the sealing layer seals the airtight door under the action of the negative pressure;
and the support part is fixed in the airtight door and used for supporting the sealing layer and preventing the sealing layer from shrinking and deforming under the action of negative pressure.
Preferably, the sealing layer is laid on the airtight door and is adhered and fixed with the airtight door, the side edge and the upper edge of the sealing layer are adhered to a wall body adjacent to the airtight door through a sealing layer fixing belt, and the lower edge of the sealing layer is adhered to the ground adjacent to the airtight door through a sealing layer fixing belt.
Preferably, a connector is arranged on the sealing layer and used for connecting a negative pressure air pump, and when the air tightness test of the air tight door is carried out, negative pressure is formed by air suction through the connector.
Preferably, one surface of the sealing layer fixing tape is bonded to a wall body or a ground beside the airtight door, and the other surface of the sealing layer fixing tape is bonded to the sealing layer for forming a sealed cavity for detecting airtightness by using the sealing layer, the sealing layer fixing tape and the airtight door.
Preferably, the support portion comprises a support net, a plurality of cross bars; the cross bar is arranged in the airtight door and adjacent to the sealing layer, and the supporting net is fixed on the cross bar and attached to the sealing layer and used for supporting the sealing layer.
Preferably, the two ends of the cross rod are respectively provided with an adjusting joint, and the adjusting joints are connected with the cross rod through threads and used for adjusting the length of the cross rod so as to fix the cross rod in the airtight door.
Preferably, one side of the support net is welded on the cross bar, and the other side of the support net is attached to the surface of the sealing layer for maintaining the shape of the sealing layer.
In summary, the embodiment of the utility model has the following beneficial effects:
according to the sealing device for the airtight door air tightness test, the sealing layer fixing belt limits the boundary of the sealing layer, and the sealing performance of the device is fully guaranteed. The cross rods and the steel wire mesh plate structure are transversely arranged to provide support; the length of the cross rod is adjusted by rotating the threaded connector, so that the cross rod can be fixed on the inner side of the door opening by using friction force, and the device is simple, convenient and reliable in site. Negative pressure is formed in the sealed cavity by pumping through the joint by using the negative pressure pump, so that the field implementation process is safer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a schematic view of a sealing device for air tightness test of an airtight door according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is a schematic view of an embodiment of a sealing device for checking airtightness of an airtight door according to the present invention. In this embodiment, the sealing device for the airtight inspection of the airtight door comprises:
an expandable sealing layer 1 fixed to said airtight door 3; the edge of the sealing layer is arranged on the wall body at the side of the airtight door 3 through a sealing layer fixing belt 2 and is used for arranging a pressure sealing boundary of the sealing layer 1 on the wall surface; when the air tightness of the airtight door 3 is tested, negative pressure is formed in a sealed cavity formed by the sealing layer 1, the sealing layer fixing belt 2 and the airtight door 3 through air suction, and the sealing layer 1 seals the airtight door 3 under the action of the negative pressure; it will be appreciated that the entire door area is covered with the sealing layer 1 with the gas line connector 11 having a thickness of not less than 0.5mm on the indoor side door opening, on the side and on the ground periphery. Tightly sticking a plurality of special sealing layer fixing belts 2 for the nuclear power station on site at the joint of the periphery of the sealing layer 1 and the wall and the ground to fix the sealing layer 1 and form a sealing boundary; and coating proper vaseline on the corner of the wall surface and the ground and other positions which are difficult to seal so as to ensure the sealing effect of the sealing boundary.
In a specific embodiment, the sealing layer 1 is laid on the airtight door 3 and is adhered and fixed with the airtight door 3, the side edge and the upper edge of the sealing layer 1 are adhered to a wall body adjacent to the airtight door 3 through a sealing layer fixing strip 2, and the lower edge of the sealing layer 1 is adhered to the ground adjacent to the airtight door 3 through the sealing layer fixing strip 2. And a connector 11 is arranged on the sealing layer 1 and is used for connecting a negative pressure air pump, and when the air tightness of the airtight door 3 is tested, air is pumped through the connector 11 to form negative pressure. One surface of the sealing layer fixing band 2 is bonded on a wall body or the ground at the edge of the airtight door 3, and the other surface of the sealing layer fixing band 2 is bonded with the sealing layer 1, so that the sealing layer 1, the sealing layer fixing band 2 and the airtight door 3 form a sealed cavity for detecting airtightness.
And the supporting part is fixed in the airtight door 3 and is used for supporting the sealing layer 1 and preventing the sealing layer 1 from shrinking and deforming under the action of negative pressure. It will be appreciated that four to five transverse bars 31 and steel mesh (support mesh 32) structures are provided laterally inside the test door opening to provide support. The length of the cross rod 31 can be adjusted through rotating the threaded joint 11, so that the cross rod can be fixed on the inner side of a door opening by using friction force, a plurality of steel wire mesh plates are selected according to the size of the door leaf and are bound on the cross rod 31 by using a binding belt, and the whole surface of the door leaf is completely covered; the whole door range is covered by a sealing layer 1 with an air passage joint 11 with the thickness not less than 0.5mm on the indoor side door opening, the side and the ground periphery.
In a particular embodiment, the support comprises a support net 32, a plurality of cross bars 31; the cross bar 31 is arranged in the airtight door 3 and adjacent to the sealing layer 1, and the support net 32 is fixed on the cross bar 31 and attached to the sealing layer 1 for supporting the sealing layer 1. And adjusting joints are respectively arranged at two ends of the cross rod 31 and are connected with the cross rod 31 through threads for adjusting the length of the cross rod 31, so that the cross rod 31 is fixed in the airtight door 3. One side of the support net 32 is welded on the cross bar 31, and the other side of the support net 32 is attached to the surface of the sealing layer 1 for maintaining the shape of the sealing layer 1.
In summary, the embodiment of the utility model has the following beneficial effects:
according to the sealing device for the airtight door air tightness test, the sealing layer fixing belt limits the boundary of the sealing layer, and the sealing performance of the device is fully guaranteed. The cross rods and the steel wire mesh plate structure are transversely arranged to provide support; the length of the cross rod is adjusted by rotating the threaded connector, so that the cross rod can be fixed on the inner side of the door opening by using friction force, and the device is simple, convenient and reliable in site. Negative pressure is formed in the sealed cavity by pumping through the joint by using the negative pressure pump, so that the field implementation process is safer.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the utility model is not limited by the scope of the appended claims.
Claims (7)
1. A sealing device for the airtight inspection of an airtight door, comprising:
an expandable sealing layer secured to the airtight door; the edge of the sealing layer is arranged on the wall body beside the airtight door through a sealing layer fixing belt and used for arranging a pressure sealing boundary of the sealing layer on the wall surface; when the air tightness of the airtight door is tested, negative pressure is formed in a sealing cavity formed by the sealing layer, the sealing layer fixing belt and the airtight door through air suction, and the sealing layer seals the airtight door under the action of the negative pressure;
and the support part is fixed in the airtight door and used for supporting the sealing layer and preventing the sealing layer from shrinking and deforming under the action of negative pressure.
2. The sealing device for airtight door inspection according to claim 1, wherein said sealing layer is laid on said airtight door and adhesively fixed to said airtight door, the side edges and upper edges of said sealing layer are adhered to the wall body adjacent to the airtight door by sealing layer fixing tapes, and the lower edge of said sealing layer is adhered to the floor adjacent to the airtight door by sealing layer fixing tapes.
3. The sealing device for air tightness inspection of the airtight door as claimed in claim 2, wherein a joint is provided on said sealing layer for connecting a negative pressure air pump, and when the air tightness inspection of the airtight door is performed, a negative pressure is formed by sucking air through the joint.
4. The sealing device for airtight door airtightness inspection according to claim 3, wherein one side of the sealing layer fixing tape is adhered to the wall or the floor of the airtight door, and the other side of the sealing layer fixing tape is adhered to the sealing layer, so that the sealing layer, the sealing layer fixing tape and the airtight door constitute a sealed chamber for detecting airtightness.
5. The sealing device for the air-tightness test of an airtight door according to claim 4, wherein said supporting portion comprises a supporting mesh, a plurality of cross bars; the cross bar is arranged in the airtight door and adjacent to the sealing layer, and the supporting net is fixed on the cross bar and attached to the sealing layer and used for supporting the sealing layer.
6. The sealing device for airtight door check according to claim 5, wherein said cross bar is provided at both ends thereof with adjusting joints, respectively, said adjusting joints are connected with said cross bar by screw threads for adjusting the length of said cross bar to fix said cross bar in said airtight door.
7. The sealing device for airtight door hermetic seal inspection according to claim 6 wherein said support net is welded on one side to said cross bar and said support net is attached on the other side to the surface of said sealing layer for maintaining the shape of said sealing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121753449.7U CN215338727U (en) | 2021-07-29 | 2021-07-29 | Sealing device for air tightness test of airtight door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121753449.7U CN215338727U (en) | 2021-07-29 | 2021-07-29 | Sealing device for air tightness test of airtight door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215338727U true CN215338727U (en) | 2021-12-28 |
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ID=79574092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121753449.7U Active CN215338727U (en) | 2021-07-29 | 2021-07-29 | Sealing device for air tightness test of airtight door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215338727U (en) |
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2021
- 2021-07-29 CN CN202121753449.7U patent/CN215338727U/en active Active
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