Civil air defense protection equipment leakproofness on-site detection equipment and method for simulating wartime working conditions

Abstract

The invention discloses a civil air defense protection equipment leakproofness on-site detection device and method for simulating wartime working conditions, and the device comprises a closed frame which is installed at the periphery of the inner wall of a door frame wall, the two sides of the closed frame are bonded with cover materials, and one side, close to a to-be-detected piece, of the closed frame is provided with an electromagnetic vent valve through a reserved hole of the closed frame. A pressure measuring pipe and an exhaust pipe are installed on the other side, a digital micromanometer is installed on the pressure measuring pipe, and a gas mass flow meter, a control valve and a vacuum pump are sequentially installed on the exhaust pipe. Wartime working conditions are simulated, the sealing frame of the double-layer high-strength aluminum alloy structure and the vacuum pump are used for generating a negative pressure environment, the sealing performance of the protection equipment is accurately detected, and traditional positive pressure detection errors are avoided. Leakage points are accurately positioned through coloring aerosol leakage detection, and the maintenance efficiency is improved. Besides, the modular design enables the detection equipment to be wide in application range, can detect protective doors and hole sealing members of different specifications, is suitable for leakproofness detection of doors, windows and curtain walls, and meets diversified requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of airtightness detection of protective equipment, and in particular to an on-site airtightness detection device and method for human air defense protective equipment simulating wartime working conditions. Background Art

[0002] In the field of civil air defense engineering construction, the airtightness of protective equipment is of vital importance. It is related to the safety of personnel and materials in fortifications during wartime and is the key line of defense against toxic and harmful gases from the outside world. However, the current airtightness detection technology for civil air defense protective equipment has significant defects.

[0003] Most existing testing equipment and methods use positive pressure testing, that is, filling the protective equipment with gas to make the internal air pressure higher than the external air pressure, and judging the airtightness by observing the pressure difference and gas leakage. However, this is completely opposite to the actual working conditions during wartime, when the pressure of toxic and harmful gases outside is greater than that inside the fortifications, and the external pressure tries to enter the fortifications. This difference makes it difficult for the test results to truly reflect the performance of the protective equipment during wartime, and it is difficult to make an accurate assessment of the actual protective capabilities of the protective equipment.

[0004] At the same time, the existing technology has limited means to detect the leakage position of protective equipment, and it is difficult to accurately locate it. When the detection finds that the airtightness of the protective equipment does not meet the standard, it is impossible to quickly and accurately determine the specific leakage point, the maintenance efficiency is low, and it is difficult to fundamentally solve the airtightness problem.

[0005] In addition, the application scope of existing detection equipment is relatively narrow, and it can only detect smaller protective closed doors, closed doors, suspended plate valves, etc. For larger openings, such as special opening closure components of some large civil air defense fortifications, existing equipment cannot perform effective detection and cannot meet the diverse civil air defense project detection needs. Summary of the invention

[0006] The purpose of the present invention is to provide an on-site detection device and method for the tightness of civil air defense equipment simulating wartime working conditions, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a field detection device for airtightness of human defense equipment simulating wartime working conditions, comprising a to-be-detected part installed outside an opening of a door frame wall, a closed frame installed around the inner wall of the door frame wall by sealant, and a cover material bonded to the left and right sides of the closed frame by sealant, an electromagnetic vent valve is installed on one side of the closed frame close to the to-be-detected part through a reserved hole of the closed frame, and a pressure measuring tube and an exhaust pipe are installed on the other side, and one end of the electromagnetic vent valve, the pressure measuring tube and the exhaust pipe penetrate the frame and extend into the inner cavity of the closed frame; A digital micromanometer is installed at the other end of the pressure measuring tube, and a gas mass flow meter, a first control valve, a second control valve and a vacuum pump are installed in sequence at the other end of the air extraction pipe.

[0008] Preferably, the enclosed frame comprises a two-layer frame structure, and the two-layer frame structure is composed of a side frame a, a middle frame b and a corner frame c connected in a socket-type manner, and the two-layer frame is fixedly connected by a plurality of limit rods d.

[0009] Preferably, the covering material is a PE film with a thickness of 1.2 mm, and the sealant is a silicone sealant.

[0010] Preferably, the electromagnetic ventilation valve, digital micromanometer, gas mass flow meter, first control valve, second control valve and vacuum pump are all electrically connected to the controller.

[0011] Preferably, a digital micromanometer is also installed between the first control valve and the second control valve.

[0012] A method for on-site detection of airtightness of civil air defense equipment simulating wartime working conditions: S1 Preparation before testing: Check the appearance of the part to be tested, and use acetone to wipe the walls around the hole where the sealed frame is to be installed; S2 Sealing and installing the closed frame: Use socket-and-socket connection to assemble the frame, middle frame, corner frame and limit rod. Apply silicone sealant evenly on the inner wall, upper and lower openings of the assembled closed frame and the door frame wall opening, and install the closed frame. S3 Install the detection accessories: Install the electromagnetic ventilation valve through the reserved hole of the closed frame on the side of the closed frame close to the part to be detected, and install the pressure measuring tube and the exhaust pipe on the other side; S4 Install the covering material: Apply sealant evenly on both sides of the closed frame to tightly bond the covering material; S5 connects the testing equipment: connects the pressure measuring tube to the digital micromanometer through the air pipe quick connector, and connects the air extraction pipe to the gas mass flow meter, the first control valve, the second control valve and the vacuum pump in sequence; S6 Inspection of airtightness of sealed frame: close the part to be tested, ensure that it is in a closed and sealed state, open the first control valve and the second control valve, start the vacuum pump to evacuate, close the first control valve and the second control valve, and judge whether the airtightness meets the standard requirements by the fluctuation of the detection value of the digital micromanometer within the waiting time required by the standard. If the airtightness of the vacuum chamber does not meet the standard requirements, use colored aerosol to detect leaks and perform plugging treatment in time until the airtightness of the sealed frame meets the standard requirements; S7: Tightness test of the test piece: open the electromagnetic ventilation valve, the first control valve and the second control valve, start the vacuum pump to continue working, so that the pressure in the vacuum chamber reaches the standard requirements. After reaching the target pressure, close the first control valve and the second control valve, and wait for the time required by the standard; S8 determines whether the airtightness is qualified: after the waiting time is over, check the digital micromanometer connected to the pressure measuring tube. If the pressure meets the standard requirements, the airtightness of the test piece is qualified; if the pressure drops, open the second control valve and start the vacuum pump, then open the first control valve, and calculate the leakage according to the gas flow meter reading. If the leakage meets the standard, the test is qualified; otherwise, use colored aerosol to detect the leakage point and seal it.

[0013] S9 re-inspection: After the plugging is completed, re-inspect according to steps S7 to S8 until the airtightness test of the part to be inspected passes.

[0014] Preferably, the sealant is silicone sealant, and the covering material is a PE film with a thickness of 1.2 mm.

[0015] The invention proposes an on-site detection device and method for the tightness of civil air defense equipment simulating wartime working conditions, which has the following beneficial effects: 1. The present invention simulates real working conditions and has more accurate detection: the equipment simulates the negative pressure condition in which the external pressure during war is greater than the internal pressure of the fortification. Its closed frame structure is closely connected to the door frame wall, and a negative pressure environment is formed by evacuating air through a vacuum pump. The closed frame in this application adopts a double-layer structure, with a frame, a middle frame and a corner frame made of high-strength aluminum alloy connected in a socket-type manner, and then fixed with a limit rod. It can withstand negative pressure and has good sealing performance. During detection, the negative pressure environment consistent with the wartime working conditions can accurately detect the actual sealing performance of the protective equipment, avoid the errors caused by traditional positive pressure detection, and ensure that the test results are true and reliable.

[0016] 2. The present invention can accurately locate the leakage point, making maintenance more efficient: It has the function of accurately locating the leakage point. When it is detected that the airtightness is not up to standard, use colored aerosol to detect leaks. At key locations such as the contact position between the parts to be tested and the opening, the connection between the sealing frame and the door frame wall, and the installation location of the electromagnetic ventilation valve, once there is a leak, the color change of the aerosol can identify the leakage point, and the inspection personnel can quickly carry out targeted maintenance, saving maintenance time and cost, and improving the maintenance efficiency and airtightness of the protective equipment.

[0017] 3. The present invention has a wide range of applications and meets various needs: it adopts a modular design and has a wide range of applications. The frame, middle frame, corner frame and limit rod of the closed frame can be flexibly combined to detect protective equipment of various specifications. The parts to be detected can include protective closed doors, closed doors, and suspended plate valves with a width of 700mm-7000mm and a height of 1600mm-4300mm. It can also detect larger opening closure components. Moreover, the detection equipment and method can also be applied to the airtightness detection of doors, windows, and curtain walls to meet the detection needs of different construction fields and have strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the structure of the present invention; Figure 2 It is a structural schematic diagram of the closed frame of the present invention.

[0019] In the figure: 1. door frame wall, 2. part to be tested, 3. closed frame, 3a. side frame, 3b. middle frame, 3c. corner frame, 3d. limit rod, 4. electromagnetic ventilation valve, 5. pressure measuring tube, 6. exhaust pipe, 7. digital micromanometer, 8. gas mass flow meter, 9. first control valve, 10. second control valve, 11. vacuum pump. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-2 The present invention provides a technical solution: a field detection device for the airtightness of human defense equipment simulating wartime working conditions, comprising a to-be-detected part 2 installed outside the opening of a door frame wall 1, a closed frame 3 installed around the inner wall of the door frame wall 1 by silicone sealant, the closed frame 3 comprising a two-layer frame structure, the two-layer frame structure is composed of a frame 3a, a middle frame 3b and a corner frame 3c connected in a socket-type manner, and the two layers of frames are fixedly connected by a plurality of limit rods 3d, the frame 3a, the middle frame 3b, the corner frame 3c and the limit rod 3d are all made of high-strength aluminum alloy material, which is not only light in weight and convenient for the transportation and installation of the equipment, but also has good corrosion resistance, can adapt to different detection environments, and prolong the service life of the equipment. The limit rods 3d are evenly distributed between the two layers of frames, and the number and length of the limit rods 3d are reasonably designed according to the size of the closed frame 3. For a closed frame of smaller size, the number of limit rods is relatively small, while a closed frame of larger size requires more limit rods to ensure the relative position between the two layers of frames is fixed.

[0022] The left and right sides of the closed frame 3 are respectively bonded with covering materials by silicone sealant. The covering material is a PE film with a thickness of 1.2 mm. The PE film with a thickness of 1.2 mm has good flexibility and sealing properties, and can effectively prevent gas leakage. Silicone sealant is neutral and has excellent bonding properties and weather resistance. It can form a stable and durable sealed connection to ensure the airtightness of the closed frame 3. An electromagnetic ventilation valve 4 is installed on one side of the closed frame 3 close to the part to be detected 2 through a reserved hole in the closed frame, and a pressure measuring tube 5 and an exhaust pipe 6 are installed on the other side. One end of the electromagnetic ventilation valve 4, the pressure measuring tube 5 and the exhaust pipe 6 penetrate the frame and extend into the inner cavity of the closed frame 3; A digital micromanometer 7 is installed at the other end of the pressure measuring tube 5, and a gas mass flow meter 8, a first control valve 9, a second control valve 10 and a vacuum pump 11 are installed in sequence at the other end of the exhaust pipe 6.

[0023] The electromagnetic ventilation valve 4, digital micromanometer 7, gas mass flowmeter 8, first control valve 9, second control valve 10 and vacuum pump 11 are all electrically connected to the controller. The electrical connection line of the electromagnetic ventilation valve 4 passes through the hole for installing the pressure measuring tube 5 and the exhaust pipe 6, passes out of the frame, and is connected to the external power supply of the frame.

[0024] A digital micromanometer is also installed between the first control valve 9 and the second control valve 10, which is conducive to real-time monitoring of the pressure change in the pipeline when the gas mass flow meter detects the gas flow. The detailed connection means are well-known in the art, and the following mainly introduces the working principle and process: S1 Preparation before testing and assembly of the sealed frame: Check the appearance of the parts to be tested, carefully check the integrity of the appearance of the parts to be tested, and check whether there is any damage, deformation, etc.; check its straightness to ensure that there is no obvious bending or bumps; at the same time, carefully check the integrity and surface condition of the sealing rubber strip of the parts to be tested. If there are signs of wear, breakage or aging, they must be recorded or handled in time to avoid affecting the test results. Use acetone to wipe the walls around the hole where the sealed frame is to be installed. Acetone has good solubility and can effectively remove dust, oil and other impurities in these parts, so that the silicone sealant applied later can adhere better and ensure the sealing effect.

[0025] S2 Sealing and installing the closed frame: Assemble the frame, middle frame, corner frame, and limit rod with socket-type connection; during the connection process, ensure that all components are accurately docked and tightly connected. If necessary, tools can be used to assist in the installation so that the closed frame forms a stable frame structure. Apply silicone sealant evenly on the inner wall, upper opening, and lower opening of the assembled closed frame and the door frame wall opening. When installing the closed frame and applying the sealant, ensure that the thickness of the glue layer is uniform to avoid bubbles or gaps, and ensure a good seal between the closed frame and the door frame wall.

[0026] S3 installs the detection accessories: install the electromagnetic ventilation valve through the reserved hole of the closed frame on the side close to the part to be tested, and install the pressure measuring tube and the exhaust pipe on the other side; during the installation process, pay attention to the connection firmness of each component to ensure that the electromagnetic ventilation valve can open and close normally, and the pressure measuring tube and the exhaust pipe are tightly connected without leakage risk.

[0027] S4 installation cover material: evenly apply silicone sealant on both sides of the sealed frame and tightly bond the 1.2mm PE film; when bonding, try to smooth the film to avoid wrinkles, ensure the sealing effect between the film and the sealed frame, and form a closed vacuum detection space.

[0028] S5 connects the testing equipment: connect the pressure measuring tube to the digital micromanometer through the air pipe quick connector, and connect the air extraction tube to the gas mass flow meter, the first control valve, the second control valve and the vacuum pump in sequence; ensure that the connection is tight and there is no air leakage, so that the entire testing system forms a complete path.

[0029] S6 Sealing test of the sealed frame: Close the part to be tested, make sure it is closed and sealed, and put the whole device into the test preparation state. At this time, check the connection of each component and the initial state of the equipment again, and prepare for the next test after confirming that everything is correct.

[0030] Open the first control valve and the second control valve, start the vacuum pump to evacuate, close the first control valve and the second control valve, and judge whether the airtightness meets the standard requirements by the fluctuation of the detection value of the digital micromanometer 7 during the waiting time required by the standard. The standards described in this article refer to the "Standards for Experimental Test and Quality Inspection of Civil Air Defense Engineering Protection Equipment" RFJ04-2009 and the "Interim Standards for Product and Installation Quality Inspection of Civil Air Defense Engineering Protection Equipment" RFJ003-2021. For example, if it is stipulated that the pressure change within a certain period of time shall not exceed a certain value such as ±5Pa, if the actual pressure change exceeds this range, it indicates that there may be a leak in the vacuum chamber. If the airtightness of the vacuum chamber does not meet the standard requirements, use a colored aerosol to detect leaks, and spray a colored aerosol at the connection between the closed frame and the wall. Once a leak is found that causes the color of the aerosol to change, the leak point is found and sealed in time. Sealant sealing or replacement of sealing components can be used until the airtightness of the closed frame meets the standard requirements; S7: Tightness test of the test piece: open the electromagnetic ventilation valve, the first control valve and the second control valve, start the vacuum pump to continue working, so that the pressure in the vacuum chamber reaches the standard requirements. After reaching the target pressure, close the first control valve and the second control valve, and wait for the time required by the standard; S8 determines whether the airtightness is qualified: after the waiting time is over, check the digital micromanometer connected to the pressure measuring tube. If the pressure meets the standard requirements, the airtightness of the test piece is qualified; if the pressure drops, open the second control valve and start the vacuum pump, then open the first control valve, and calculate the leakage according to the gas flow meter reading. If the leakage meets the standard, the test is qualified; otherwise, use colored aerosol to detect the leakage point and seal it.

[0031] S9 re-inspection: After the plugging is completed, re-inspect according to steps S7 to S8 until the airtightness test is qualified.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A field test device for the tightness of civil air defense equipment simulating wartime working conditions, comprising a test piece (2) installed outside an opening of a door frame wall (1), characterized in that: A sealing frame (3) is installed around the inner wall of the door frame wall (1) by means of sealant, and the left and right sides of the sealing frame (3) are respectively bonded with cover materials by means of sealant, and an electromagnetic ventilation valve (4) is installed on one side of the sealing frame (3) close to the to-be-detected component (2) through a reserved hole in the sealing frame, and a pressure measuring tube (5) and an exhaust pipe (6) are installed on the other side, and one end of the electromagnetic ventilation valve (4), the pressure measuring tube (5) and the exhaust pipe (6) penetrates the frame and extends into the inner cavity of the sealing frame (3); The other end of the pressure measuring tube (5) is installed with a digital micromanometer (7), and the other end of the exhaust pipe (6) is installed with a gas mass flow meter (8), a first control valve (9), a second control valve (10) and a vacuum pump (11) in sequence.

2. According to claim 1, a field detection device for airtightness of civil air defense equipment simulating wartime working conditions, characterized in that: The enclosed frame (3) comprises a two-layer frame structure, wherein the two-layer frame structure is composed of a side frame (3a), a middle frame (3b) and a corner frame (3c) connected in a socket-type manner, and the two-layer frame is fixedly connected via a plurality of limit rods (3d).

3. According to claim 1, a field detection device for airtightness of civil air defense equipment simulating wartime working conditions is characterized in that: The cover material is a PE film with a thickness of 1.2 mm, and the sealant is a silicone sealant.

4. According to claim 1, a field detection device for airtightness of civil air defense equipment simulating wartime working conditions is characterized in that: The electromagnetic ventilation valve (4), the digital micromanometer (7), the gas mass flow meter (8), the first control valve (9), the second control valve (10) and the vacuum pump (11) are all electrically connected to the controller.

5. According to claim 1, a field detection device for airtightness of civil air defense equipment simulating wartime working conditions, characterized in that: A digital micromanometer is also installed between the first control valve (9) and the second control valve (10).

6. A method for on-site detection of airtightness of civil air defense equipment simulating wartime working conditions, characterized in that: S1 Preparation before testing: Use acetone to wipe the walls around the hole where the sealed frame is to be installed; S2 Sealing and installing the closed frame: Use socket-and-socket connection to assemble the frame, middle frame, corner frame and limit rod, apply sealant evenly on the assembled closed frame and the inner wall, upper opening and lower opening of the door frame wall opening, and install the closed frame; S3 Install the detection accessories: Install the electromagnetic ventilation valve through the reserved hole of the closed frame on the side of the closed frame close to the part to be detected, and install the pressure measuring tube and the exhaust pipe on the other side; S4 Install the covering material: Apply sealant evenly on both sides of the closed frame and bond the covering material; S5 connects the testing equipment: connects the pressure measuring tube to the digital micromanometer through the air pipe quick connector, and connects the air extraction pipe to the gas mass flow meter, the first control valve, the second control valve and the vacuum pump in sequence; S6 Sealing test of the sealed frame: open the first control valve and the second control valve, start the vacuum pump to evacuate, close the first control valve and the second control valve, and judge whether the sealing meets the standard requirements by the fluctuation of the detection value of the digital micromanometer within the waiting time required by the standard. If it does not meet the standard requirements, use colored aerosol to detect the leakage point and seal it until it meets the standard requirements; S7: Tightness test of the test piece: open the electromagnetic ventilation valve, the first control valve and the second control valve, start the vacuum pump to continue working, so that the pressure in the vacuum chamber reaches the standard requirements. After reaching the target pressure, close the first control valve and the second control valve, and wait for the time required by the standard; S8: Determine whether the airtightness is qualified: after the waiting time is over, check the digital micromanometer. If the pressure meets the standard requirements, the airtightness of the test piece is qualified; if the pressure drops, open the second control valve and start the vacuum pump, then open the first control valve, and calculate the leakage amount according to the reading of the gas flow meter. If the leakage amount meets the standard, the test is qualified; otherwise, use colored aerosol to detect the leakage point and seal it; S9 re-inspection: After the plugging is completed, re-inspect according to steps S7 to S8 until the airtightness test of the part to be inspected passes.

7. The method for on-site detection of airtightness of civil air defense equipment simulating wartime working conditions according to claim 6 is characterized in that The sealant is silicone sealant, and the cover material is a PE film with a thickness of 1.2 mm.

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