Method and device for detecting airtight performance of protective airtight door

Abstract

The invention relates to the technical field of protective engineering detection, and provides a method and device for detecting the airtightness of a protective air-tight door, and the method comprises the following steps: constructing a first overpressure chamber, and employing a door opening structure of the protective air-tight door and two sealing films which are arranged at an interval in the depth direction of the door opening structure to form the first overpressure chamber, the two sealing films are the same in material, sealing specification and connecting process with the door opening structure; testing the first overpressure chamber to obtain an additional permeation amount; a second overpressure chamber is constructed, and the door opening structure, the sealing film and the protective sealing door are used for defining the second overpressure chamber; testing the second overpressure chamber to obtain the total air leakage; and obtaining the air leakage of the protective air-tight door based on the additional permeation amount and the total air leakage amount. Through the arrangement, the problems that the installed on-site detection device for the sealing performance of the protective air-tight door is difficult to meet the standard requirement, the detection device is poor in applicability and the like are effectively solved, and the on-site detection requirement for the sealing performance after the protective air-tight door of the civil air defense project is installed can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of protective engineering detection, and in particular to a method and device for detecting the sealing performance of a protective sealed door. Background Art

[0002] Civil air defense projects are underground protective buildings built separately to ensure the shelter of personnel and materials, civil air defense command, and medical rescue in wartime, as well as basements built in combination with ground buildings that can be used for air defense in wartime. Protective airtight doors are equipment installed at the entrances and exits of civil air defense projects and at the partitions of protection units to block or weaken shock waves and prevent the entry of biological and chemical weapons. Their airtight performance directly affects the effectiveness of the entire protection system.

[0003] The airtightness test method for protective closed doors of civil air defense projects mainly uses the flow method to test their airtightness. This method requires the construction of an overpressure chamber for overpressure testing. At present, the on-site airtightness performance test technology of relevant protective closed doors in China is in accordance with the standards of the civil air defense industry. The air leakage of the overpressure chamber built on site must be less than 0.001m 3 / h.

[0004] Limited by the actual installation conditions on site, it is difficult to meet the airtightness testing equipment requirements in the industry standards. In addition, the overpressure chamber built for on-site airtightness testing is a simple assembled structure and a disposable testing equipment. The overpressure chamber built strictly in accordance with the standard requirements is time-consuming, labor-intensive, and expensive. The testing cycle is long and the testing applicability is poor, making it impossible to promote and apply on a large scale. Therefore, the testing of the airtightness performance of protective sealed doors is still limited to the laboratories of professional testing agencies or manufacturers.

[0005] Therefore, how to realize the sealing performance detection of protective sealed doors installed on site has become an important issue that needs to be solved urgently. Summary of the invention

[0006] The present invention provides a method and device for detecting the sealing performance of protective sealed doors, which are used to solve the problems in the prior art that the on-site detection device for the sealing performance of protective sealed doors installed cannot meet the standard requirements and the applicability of the detection device is poor, and is conducive to the realization of the on-site detection requirements for the sealing performance of protective sealed doors after installation in civil air defense projects.

[0007] The present invention provides a method for detecting the sealing performance of a protective sealed door, comprising the following steps: Constructing a first overpressure chamber, using a door opening structure of a protective sealed door and two sealed membranes spaced apart in the depth direction of the door opening structure to enclose the first overpressure chamber, wherein the two sealed membranes have the same material, sealing specifications, and connection process with the door opening structure; Testing the first overpressure chamber to obtain additional permeation; Construct a second overpressure chamber, and enclose the second overpressure chamber by using the door opening structure, the airtight membrane and the protective airtight door; Test the second overpressure chamber to obtain the total air leakage; Based on the additional permeation amount and the total air leakage, obtain the air leakage of the protective airtight door.

[0008] According to a method for detecting the airtight performance of a protective airtight door provided by the present invention, the construction of the first overpressure chamber includes: Cut the airtight membrane based on the size of the door opening structure; Paste the two airtight membranes into the door opening structure respectively. After each airtight membrane is pasted, support the airtight membrane by using a support frame, and seal the gap between the airtight membrane and the door opening structure.

[0009] According to a method for detecting the airtight performance of a protective airtight door provided by the present invention, the construction of the second overpressure chamber includes: removing the airtight membrane close to the protective airtight door and closing the protective airtight door.

[0010] According to a method for detecting the airtight performance of a protective airtight door provided by the present invention, testing the first overpressure chamber to obtain the additional permeation amount includes: Slowly inflate and pressurize the first overpressure chamber; After the pressure in the first overpressure chamber reaches the preset pressure and is in a stable state, read the amount of gas replenished into the first overpressure chamber to maintain the preset pressure within a preset time period; And / or, testing the second overpressure chamber to obtain the total air leakage, including: Slowly inflate and pressurize the second overpressure chamber; After the pressure in the second overpressure chamber reaches the preset pressure and is in a stable state, read the amount of gas replenished into the second overpressure chamber to maintain the preset pressure within a preset time period.

[0011] According to a method for detecting the airtight performance of a protective airtight door provided by the present invention, the obtaining of the air leakage of the protective airtight door based on the additional permeation amount and the total air leakage includes: Based on the additional permeation amount, obtain the air leakage of a single airtight membrane; Based on the difference between the total air leakage and the air leakage of a single airtight membrane, obtain the air leakage of the protective airtight door.

[0012] The present invention also provides a device for detecting the airtight performance of a protective airtight door, including: There are two airtight membranes. Both of the two airtight membranes are connected to the door opening structure of the protective airtight door and are arranged at intervals along the depth direction of the door opening structure, so that the two airtight membranes and the door opening structure enclose a first overpressure chamber, and the airtight membrane relatively far from the protective airtight door, the door opening structure and the protective airtight door enclose a second overpressure chamber; A detection module, which is suitable for detecting the air leakage amounts of the first overpressure chamber and the second overpressure chamber.

[0013] For a protective airtight door airtightness detection device provided by the present invention, at least an air inlet and a pressure measurement port are provided on the airtight membrane far from the protective airtight door; The detection module includes an air source, a flowmeter and a pressure gauge; the air source is connected to the air inlet through the flowmeter, and the pressure gauge is connected to the pressure measurement port.

[0014] For a protective airtight door airtightness detection device provided by the present invention, it further includes a support frame, and the support frame is used to provide support for the side of the airtight membrane facing away from the first overpressure chamber.

[0015] For a protective airtight door airtightness detection device provided by the present invention, the support frame includes at least one frame unit, and the frame unit can expand and contract along its own length and width directions.

[0016] For a protective airtight door airtightness detection device provided by the present invention, an airtight rubber strip is arranged between the outer periphery of the support frame and the door opening structure.

[0017] For the protective airtight door airtightness detection method and device provided by the present invention, when detecting the airtightness of the protective airtight door, first measure the air leakage amount of the first overpressure chamber and obtain the air leakage amount of a single airtight membrane therefrom, and then subtract the air leakage amount of the single airtight membrane from the total air leakage amount to obtain the air leakage amount of the protective airtight door. Since the airtightness of the first overpressure chamber and the second overpressure chamber is affected by the same systematic error, the systematic error can be effectively eliminated by taking the difference, thereby reducing the requirement for the air leakage amount of the overpressure chamber, and effectively solving the problems that the on-site detection device for the airtightness of the installed protective airtight door is difficult to meet the standard requirements (i.e., the air leakage amount is less than 0.001 m3 / h) and the applicability of the detection device is poor, etc., which is beneficial to the realization of the on-site detection requirements for the airtightness of the protective airtight door in the civil air defense project after installation. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic flow chart of the method for detecting the airtight performance of the airtight and protective door provided by the embodiment of the present invention.

[0020] Figure 2 It is one of the structural schematic diagrams of the device for detecting the airtight performance of the airtight and protective door provided by the embodiment of the present invention.

[0021] Figure 3 It is another structural schematic diagram of the device for detecting the airtight performance of the airtight and protective door provided by the embodiment of the present invention.

[0022] Figure 4 It is the third structural schematic diagram of the device for detecting the airtight performance of the airtight and protective door provided by the embodiment of the present invention.

[0023] Reference signs: 10. First airtight film; 20. Second airtight film; 30. Detection module; 31. Air source; 32. Flowmeter; 33. Pressure gauge; 34. Intake pipe; 35. Manometer tube; 40. Support frame; 41. Frame unit; 42. Airtight rubber strip; 50. Door opening structure; 60. Airtight and protective door. Specific embodiments

[0024] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0025] To better understand the method and device for detecting the airtight performance of the airtight and protective door provided by the embodiment of the present invention, its application background will be introduced first. As an important performance index of the airtight and protective door in civil air defense projects, the airtight performance directly affects the effectiveness of the entire civil air defense project.

[0026] The method for detecting the airtightness of the airtight and protective door in civil air defense projects mainly uses the flow method to detect its airtightness. This method requires the construction of an overpressure chamber for overpressure detection. Currently, for the on-site airtight performance detection technology of relevant airtight and protective doors in China, the air leakage of the on-site constructed overpressure chamber must be less than 0.001 m 3 / h. However, due to the limitations of the actual on-site installation conditions, it is difficult to meet the requirements of the airtightness detection equipment in the industry standards. Moreover, since the overpressure chamber built for on-site airtightness detection is a simple assembled structure and belongs to a one-time detection device, building an overpressure chamber strictly in accordance with the standard requirements is time-consuming, laborious, costly, has a long detection cycle, and poor detection applicability, making it impossible to be widely promoted and applied on a large scale. Therefore, the airtightness detection of the protective airtight door is still limited to being achieved in the laboratories of professional detection institutions or manufacturers.

[0027] Based on the above problems, in the embodiments of the present invention, a method and device for detecting the airtightness performance of a protective airtight door are provided, which can effectively solve the problems that the on-site detection device for the airtightness performance of the installed protective airtight door cannot meet the standard requirements and the detection device has poor applicability, etc., and is conducive to the realization of the on-site detection requirements for the airtightness performance of the protective airtight door after installation in civil air defense projects.

[0028] The following combines Figures 1-4 to describe the method and device for detecting the airtightness performance of the protective airtight door of the present invention.

[0029] Figure 1 is a schematic flowchart of the method for detecting the airtightness performance of the protective airtight door provided by the embodiment of the present invention. As Figure 1 shown, the method includes the following steps: Step S10: Construct a first overpressure chamber. Use the door opening structure 50 of the protective airtight door 60 and two airtight membranes arranged at intervals along the depth direction of the door opening structure 50 to enclose the first overpressure chamber. The materials, sealing specifications, and connection processes of the two airtight membranes with the door opening structure 50 are all the same.

[0030] It should be noted here that the above-mentioned door opening structure 50 refers to the opening reserved for installing the protective airtight door 60 and its surrounding structures. According to different construction scenarios, the above-mentioned door opening structure 50 can have different structural forms. For example, it can be the wall around the door opening, or a reinforcement structure such as a door frame provided on the wall around the door opening. The embodiments of the present invention do not make specific limitations.

[0031] In addition, the airtight membrane is a thin film used to construct the sealed environment of the overpressure chamber. Its size needs to be determined based on the size of the door opening structure 50, and its material needs to be comprehensively considered in combination with specific application scenarios, functional characteristics, and cost-effectiveness, etc. In this embodiment, the airtight membrane uses a PE (polyethylene) membrane.

[0032] In one embodiment of the present invention, step S10 includes: Step S100: Cut the airtight membrane based on the size of the door opening structure 50.

[0033] Specifically, cutting the airtight film based on the size of the door opening structure 50 can make the airtight film better adapt to the door opening structure 50 and ensure the sealing effect of the first overpressure chamber.

[0034] Step S101: Paste the two airtight films into the door opening structure 50 respectively. After each airtight film is pasted, use the support frame to support the airtight film and seal the gap between the airtight film and the door opening structure 50; at least leave an air inlet and a pressure measuring port on the airtight film far from the protective airtight door 60.

[0035] Specifically, when inflating and pressurizing the first overpressure chamber, the air pressure will directly act on the airtight film. If no support is provided for the side of the airtight film facing away from the overpressure chamber and only relying on the adhesive force, it may be difficult to achieve effective sealing of the first overpressure chamber, especially when detecting the airtight performance of a relatively wide protective airtight door 60. Therefore, when constructing the first overpressure chamber, first paste the first airtight film into the door opening structure 50, use the support frame to support the side of the first airtight film facing away from the first overpressure chamber, and then seal the gap between the first airtight film and the door opening structure 50 to ensure airtightness. After the installation of the first airtight film is completed, install the second airtight film. Paste the second airtight film into the door opening structure 50 using the same process, use another support frame to support the side of the second airtight film facing away from the first overpressure chamber, and then use the same sealing process to seal the gap between the second airtight film and the door opening structure 50 to ensure airtightness.

[0036] In an embodiment of the present invention, the support frame 40 includes at least one frame unit 41, and the frame unit 41 can expand and contract along its own length and width directions. With such a setting, the sizes of the mouths of existing civil air defense projects are different, and the height, width and width span are very large. The width of the protective airtight door 60 ranges from less than 1 meter to 7 meters. Due to the large span of the size specifications of the protective airtight door 60, it is impossible to prefabricate the overpressure chamber specifically. In addition, for the completed civil air defense project, the door frame has been completed with the civil engineering concrete building, and there is no condition to install a steel overpressure chamber. For a relatively small protective airtight door 60, a frame unit 41 that can expand and contract along its own length and width directions can meet the support requirements. For a relatively large protective airtight door 60, multiple frame units 41 spliced together are used to meet the support requirements, so that the support frame is applicable to civil air defense projects with different mouth sizes, and can be quickly assembled on site to meet the requirements of the overpressure chamber for detecting the airtight performance of the protective airtight door 60 by the on-site flow method.

[0037] In an embodiment of the present invention, when sealing the gap between the airtight film and the door opening structure 50, first use silicone weatherproof sealant to seal the gap between the airtight film and the wall, and then use cloth-based tape to perform secondary sealing and strengthening treatment on the gap between the airtight film and the wall to ensure the sealing performance between the airtight film and the door opening structure 50.

[0038] In one embodiment of the present invention, when installing two airtight membranes, one airtight membrane is relatively close to the protective airtight door 60, and the other is relatively far from the protective airtight door 60. An air inlet and a pressure measuring port are reserved at least on the airtight membrane far from the protective airtight door 60. That is, an air inlet and a pressure measuring port can be reserved only on the airtight membrane far from the protective airtight door 60, or an air inlet and a pressure measuring port can be reserved on both airtight membranes. The first overpressure chamber can be inflated and pressurized through the air inlet so that the pressure in the first overpressure chamber reaches a preset pressure. The pressure in the first overpressure chamber can be measured through the first pressure measuring port.

[0039] Step S11: Test the first overpressure chamber to obtain the additional permeation amount.

[0040] Specifically, after the first overpressure chamber is constructed, the air inlet and the pressure measuring port on the airtight membrane are respectively connected to the measuring equipment, and the airtightness of the first overpressure chamber is measured by the flow method.

[0041] In a specific embodiment of the present invention, step S11 includes: Step S110: Slowly inflate and pressurize the first overpressure chamber.

[0042] Step S111: After the pressure in the first overpressure chamber reaches the preset pressure and is in a stable state, read the amount of gas replenished into the first overpressure chamber to maintain the preset pressure within a preset time period, which is the additional permeation amount.

[0043] Specifically, after the first overpressure chamber is constructed, it is slowly pressurized to the preset pressure through the air inlet. The preset pressure is the pressure required for the airtightness detection of the corresponding protective airtight door 60 as specified by the standard. For protective doors of different models and specifications, the pressure required for airtightness detection may also be different. Therefore, the preset pressure needs to be flexibly set according to the actual working scenario and is not specifically limited in the embodiments of the present invention. Start reading after the pressure in the first overpressure chamber is in a stable state. As the gas leaks, the pressure in the first overpressure chamber will decrease. In order to maintain the preset pressure in the first overpressure chamber, gas needs to be continuously replenished into the first overpressure chamber. Therefore, only the amount of gas replenished into the first overpressure chamber to maintain the preset pressure within a preset time period needs to be read to obtain the additional permeation amount. .

[0044] Specifically, in order to ensure the validity and detection accuracy of the data, when performing the airtightness detection on the first overpressure chamber, the detection data is not less than 3 groups, and the readings within the range of the set pressure +2 Pa are valid data. Each group of valid data is not less than 5. The average value of the valid data for each test is the average air leakage amount for that test. The average value of the average air leakage amounts for multiple tests is the additional permeation amount. .

[0045] Step S12: Construct a second overpressure chamber, and use the door opening structure 50, the airtight membrane, and the airtight and protective door 60 to enclose the second overpressure chamber.

[0046] Specifically, after the airtightness test of the second overpressure chamber is completed, remove the airtight membrane near the airtight and protective door 60, and then close the airtight door. At this time, the space enclosed by the airtight membrane far from the airtight and protective door 60, the door opening structure 50, and the airtight and protective door 60 is the second overpressure chamber.

[0047] Step S13: Test the second overpressure chamber to obtain the total air leakage volume.

[0048] Specifically, after the second overpressure chamber is constructed, connect the air inlet and the pressure measuring port on the airtight membrane to the measuring equipment respectively, and measure the airtightness of the second overpressure chamber by the flow method.

[0049] In one embodiment of the present invention, step S13 includes: Step S130: Slowly inflate and pressurize the second overpressure chamber.

[0050] Step S131: After the pressure in the second overpressure chamber reaches the preset pressure and is in a stable state, read the amount of gas replenished into the second overpressure chamber to maintain the preset pressure within the preset time period, which is the total air leakage volume.

[0051] Specifically, after the second overpressure chamber is constructed, slowly pressurize the second overpressure chamber to the preset pressure through the air inlet. The preset pressure is the pressure required for the airtightness test of the corresponding airtight and protective door 60 as specified by the standard. Since the pressures required for the airtightness tests of different models and specifications of protective doors are different, no specific limit is set for the preset pressure. Start reading after the pressure in the second overpressure chamber is in a stable state, and read the amount of gas replenished into the second overpressure chamber to maintain the preset pressure within the preset time period, and the additional penetration amount can be obtained. Q 总 .

[0052] Similarly, in order to ensure the validity of the data and the detection accuracy, when performing the airtightness test on the second overpressure chamber, the detection data is not less than 3 groups, and the readings within the range of the set pressure +2 Pa are valid data. Each group of valid data is not less than 5, and the average value of the valid data for each test is the average air leakage volume for that test. The average value of the average air leakage volumes for multiple tests is the additional penetration amount. Q 总 .

[0053] Step S14: Based on the additional penetration amount and the total air leakage volume, obtain the air leakage volume of the airtight and protective door 60.

[0054] In one embodiment of the present invention, step S14 includes: Step S140: Obtain the air leakage of a single sealed membrane based on the additional penetration volume.

[0055] Specifically, the first overpressure chamber is surrounded by two sealed membranes and the door opening structure 50. The door opening structure 50 (i.e., the wall and the ground around the door opening) is defaulted to be airtight. Then the additional penetration volume is the air leakage generated by the two sealed membranes together. Since the materials, sealing specifications (i.e., the sealing areas or sealing joint lengths of the two sealed membranes) and the connection processes with the door opening structure 50 of the two sealed membranes are the same, the air leakage of a single sealed membrane is half of the additional penetration volume, that is: Q 膜 = 。

[0056] Step S141: Obtain the air leakage of the blast-proof and airtight door 60 by subtracting the air leakage of a single sealed membrane from the total air leakage.

[0057] Specifically, the second overpressure chamber is surrounded by a sealed membrane, the door opening structure 50 and the blast-proof and airtight door 60. Then the air leakage of the second overpressure chamber Q 总 = Q 膜 + Q 门 , from which it can be determined that the air leakage of the blast-proof and airtight door 60 Q 门 = Q 总 - Q 膜 = Q 总 - 。

[0058] In the above technical solution, first measure the air leakage of the first overpressure chamber and obtain the air leakage of a single sealed membrane therefrom. Then use the total air leakage and the air leakage of a single sealed membrane to subtract and obtain the air leakage of the blast-proof and airtight door 60. Since the airtightness of the first overpressure chamber and the second overpressure chamber is affected by the same systematic error, the systematic error can be effectively eliminated by subtraction, thereby reducing the requirement for the air leakage of the overpressure chamber and effectively solving the problems that the on-site detection device for the airtight performance of the installed blast-proof and airtight door 60 is difficult to meet the standard requirements (i.e., the air leakage is less than 0.001 m 3 / h) and the applicability of the detection device is poor, which is beneficial to the realization of the on-site detection requirements for the airtight performance of the blast-proof and airtight door 60 after installation in civil air defense projects.

[0059] Next, the blast-proof and airtight door airtight performance detection device provided by the present invention will be described. The blast-proof and airtight door airtight performance detection device described below can be mutually corresponding and referred to the blast-proof and airtight door airtight performance detection method described above.

[0060] Reference Figures 2-3 , a detection device for the airtight performance of a protective airtight door, including an airtight membrane and a detection module 30; wherein, there are two airtight membranes, both of which are connected to the door opening structure 50 of the protective airtight door 60 and arranged at intervals along the depth direction of the door opening structure 50, so that the two airtight membranes and the door opening structure 50 enclose a first overpressure chamber, and the airtight membrane, the door opening structure 50 and the protective airtight door 60 that are relatively far away from the protective airtight door 60 enclose a second overpressure chamber; the detection module 30 is suitable for detecting the air leakage of the first overpressure chamber and the second overpressure chamber.

[0061] During actual detection, first, a first overpressure chamber is constructed by using the two airtight membranes and the door opening structure 50 of the protective airtight door 60, and then the detection module 30 is used to detect the air leakage of the first overpressure chamber to obtain the air leakage of a single airtight membrane; then, a second overpressure chamber is constructed by using the airtight membrane, the door opening structure 50 and the protective airtight door 60 that are far away from the protective airtight door 60, and then the detection module 30 is used to detect the air leakage of the second overpressure chamber to obtain the total air leakage. Finally, the air leakage of the protective airtight door 60 is obtained by subtracting the air leakage of a single airtight membrane from the total air leakage. Since the airtightness of the first overpressure chamber and the second overpressure chamber is affected by the same systematic error, the systematic error can be effectively eliminated by taking the difference, thereby reducing the requirement of the overpressure chamber for the air leakage, and effectively solving the problems that the on-site detection device for the airtight performance of the installed protective airtight door 60 is difficult to meet the standard requirements (i.e., the air leakage is less than 0.001m 3 / h) and the applicability of the detection device is poor, etc., which is beneficial to the realization of the on-site detection requirements for the airtight performance of the protective airtight door 60 after installation in civil air defense projects.

[0062] For the convenience of understanding, the airtight membrane that is relatively far away from the protective airtight door 60 is set as the first airtight membrane 10, and the airtight membrane that is relatively close to the protective airtight door 60 is set as the first airtight membrane 20. In an embodiment of the present invention, at least an air inlet and a pressure measuring port are provided on the airtight membrane that is far away from the protective airtight door 60, that is, the first airtight membrane 10; the detection module 30 includes an air source 31, a flow meter 32 and a pressure gauge 33; wherein, the air source 31 is connected to the air inlet through the flow meter 32 and the air inlet pipe 34, and the pressure gauge 33 is connected to the pressure measuring port through the pressure measuring pipe 35.

[0063] When detecting the air leakage, the air source 31 inflates and pressurizes the overpressure chamber through the air inlet pipe 34. After reaching the preset pressure and being in a stable state, readings are taken. While maintaining the preset pressure unchanged, the amount of gas supplemented into the overpressure chamber within the preset time displayed by the flow meter 32 is the air leakage.

[0064] In one embodiment of the present invention, the airtight membrane is adhesively fixed to the door opening structure 50. Specifically, after the airtight membrane is adhesively bonded to the door opening structure 50, first, a silicone weatherproof sealant is used to seal the gap between the airtight membrane and the wall, and then a cloth-based tape is used to perform a secondary sealing and strengthening treatment on the gap between the airtight membrane and the wall to ensure the sealing performance between the airtight membrane and the door opening structure 50.

[0065] In one embodiment of the present invention, the airtight performance detection device of the airtight and protective door further includes a support frame 40, and the support frame 40 is used to provide support for the side of the airtight membrane facing away from the first overpressure chamber. Specifically, when the overpressure chamber is inflated and pressurized, the air pressure will directly act on the airtight membrane. If no support is provided for the side of the airtight membrane facing away from the overpressure chamber and only relying on the adhesive force, it may be difficult to achieve effective sealing of the overpressure chamber. Especially when detecting the airtight performance of a relatively wide airtight and protective door 60, the support frame 40 can provide support for the side of the airtight membrane facing away from the overpressure chamber to ensure the sealing performance of the overpressure chamber.

[0066] In one embodiment of the present invention, the support frame 40 includes at least one frame unit 41, and the frame unit 41 can expand and contract along its own length and width directions. With such a setting, the support frame 40 can be adapted to air defense projects with different orifice sizes, and can be quickly assembled on-site to meet the support requirements of the overpressure chamber for detecting the airtight performance of the airtight and protective door 60 according to the on-site flow method.

[0067] It can be understood that based on different actual requirements, the frame unit 41 can be made of different materials and set in different structural forms.

[0068] In one embodiment of the present invention, the frame unit 41 is an overall rectangular frame structure and is made of aluminum alloy profiles. The aluminum alloy profiles arranged along the length and width directions of the frame unit 41 are set as a segmented structure with sliding fit, so as to realize the expansion and contraction of the frame unit 41 along the length direction and the width direction. The two sections of aluminum alloy profiles are positioned by a positioning structure. According to different actual requirements, there are various choices for the positioning structure. For example, a setscrew structure can be adopted, that is, a setscrew is threadedly connected to one section of the profile, and the two sections of the profile are tightened by the setscrew against each other to realize the positioning of the two sections of the profile. Or a cam-type locking structure can be adopted, that is, a cam is rotatably connected to one section of the profile, and the two sections of the profile are tightened against the side wall of the other section by the rotation of the cam to realize the positioning of the two sections of the profile. The specific form of the positioning structure can be selected according to actual requirements, and no specific limitation is made in the embodiments of the present invention.

[0069] In another embodiment of the present invention, the frame unit 41 can also be set as a sleeve-type structure, that is, the long sides and the wide sides of the frame unit 41 are both set as sleeves, and the expansion and contraction of the frame unit 41 along the length direction and the width direction are realized through the expansion and contraction of the sleeves. The sleeves can be positioned by setscrews.

[0070] It is understandable that the frame unit 41 includes but is not limited to the structures and telescopic positioning methods listed above. Frame units 41 with other structures or forms and telescopic positioning methods can also be applied as long as they can provide support for the airtight membrane, and they will not be listed one by one in the embodiments of the present invention.

[0071] In one embodiment of the present invention, an airtight rubber strip 42 is provided between the outer periphery of the support frame 40 and the door opening structure 50 for connecting and sealing between the support frame 40 and the door opening structure 50.

[0072] It is understandable that, without contradiction, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples.

[0073] Through the airtight performance detection method and device for the protective airtight door provided by the embodiments of the present invention, when detecting the airtight performance of the protective airtight door, first measure the air leakage of the first overpressure chamber and obtain the air leakage of a single airtight membrane therefrom, and then subtract the air leakage of a single airtight membrane from the total air leakage to obtain the air leakage of the protective airtight door 60. Since the airtightness of the first overpressure chamber and the second overpressure chamber is affected by the same systematic error, the systematic error can be effectively eliminated by taking the difference, thereby reducing the requirement of the overpressure chamber for the air leakage and effectively solving the problems that the on-site detection device for the airtight performance of the installed protective airtight door 60 is difficult to meet the standard requirements (i.e., the air leakage is less than 0.001 m 3 / h) and the poor applicability of the detection device, which is beneficial to the realization of the on-site detection requirements for the airtight performance after the installation of the protective airtight door 60 in the civil air defense project.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for detecting the airtight performance of a protective airtight door, characterized in that, Including the following steps: Construct a first overpressure chamber, and use the door opening structure (50) of the blast-proof airtight door (60) and two airtight membranes arranged at intervals along the depth direction of the door opening structure (50) to enclose the first overpressure chamber. The materials, sealing specifications, and connection processes of the two airtight membranes with the door opening structure (50) are the same; Test the first overpressure chamber to obtain the additional penetration amount; Construct a second overpressure chamber, and use the door opening structure (50), the airtight membrane, and the blast-proof airtight door (60) to enclose the second overpressure chamber; Test the second overpressure chamber to obtain the total air leakage amount; Based on the additional penetration amount and the total air leakage amount, obtain the air leakage amount of the blast-proof airtight door (60).

2. The airtight performance detection method of the airtight and protective door according to claim 1, characterized in that, The construction of the first overpressure chamber includes: Cut the airtight membrane based on the size of the door opening structure (50); Paste the two airtight membranes into the door opening structure (50) respectively. After each airtight membrane is pasted, use a support frame to support the airtight membrane and seal the gap between the airtight membrane and the door opening structure (50).

3. The airtight performance detection method of the airtight and protective door according to claim 1, characterized in that, The construction of the second overpressure chamber includes: removing the airtight membrane close to the blast-proof airtight door (60) and closing the blast-proof airtight door (60).

4. The method for detecting the airtight performance of the airtight blast door according to any one of claims 1 to 3, characterized in that, Testing the first overpressure chamber to obtain the additional penetration amount includes: Slowly inflate and pressurize the first overpressure chamber; After the pressure in the first overpressure chamber reaches the preset pressure and is in a stable state, read the amount of gas replenished into the first overpressure chamber to maintain the preset pressure within a preset time; And / or, testing the second overpressure chamber to obtain the total air leakage amount includes: Slowly inflate and pressurize the second overpressure chamber; After the pressure in the second overpressure chamber reaches the preset pressure and is in a stable state, read the amount of gas replenished into the second overpressure chamber to maintain the preset pressure within a preset time.

5. The airtightness detection method of the airtight blast door according to claim 4, characterized in that, The obtaining of the air leakage amount of the blast-proof airtight door (60) based on the additional penetration amount and the total air leakage amount includes: Based on the additional penetration amount, obtain the air leakage amount of a single airtight membrane; Based on the difference between the total air leakage amount and the air leakage amount of a single airtight membrane, obtain the air leakage amount of the blast-proof airtight door (60).

6. A detection device for the airtight performance of a protective airtight door, characterized in that, Including: Airtight membranes, there are two airtight membranes. Both of the two airtight membranes are connected to the door opening structure (50) of the blast-proof airtight door (60) and are arranged at intervals along the depth direction of the door opening structure (50), so that the two airtight membranes and the door opening structure (50) enclose the first overpressure chamber, and the airtight membrane relatively far from the blast-proof airtight door (60), the door opening structure (50), and the blast-proof airtight door (60) enclose the second overpressure chamber; A detection module (30), suitable for detecting the air leakage amounts of the first overpressure chamber and the second overpressure chamber.

7. The airtight performance detection device for the airtight and protective door according to claim 6, wherein, At least an air inlet and a pressure measurement port are provided on the airtight membrane far from the blast-proof airtight door (60); The detection module (30) includes an air source (31), a flow meter (32), and a pressure gauge (33); the air source (31) is connected to the air inlet through the flow meter (32), and the pressure gauge (33) is connected to the pressure measurement port.

8. The airtight performance detection device for the airtight and protective door according to claim 6 or 7, characterized in that, It further includes a support frame (40) which is used to provide support for the side of the airtight membrane facing away from the first overpressure chamber.

9. The airtight performance detection device for the airtight and blast door according to claim 8, characterized in that, The support frame (40) includes at least one frame unit (41) which can expand and contract along its own length and width directions.

10. The airtightness detection device for the airtight and blast door according to claim 8, characterized in that, An airtight rubber strip (42) is provided between the outer periphery of the support frame (40) and the door opening structure (50).

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