Device and method for detecting waterproof performance of metal heat preservation roof

Abstract

The invention discloses a device for detecting the waterproof performance of a metal heat preservation roof, which is provided with a detection chamber capable of detecting the waterproof performance of the metal roof by using various methods, and can be used for carrying out comprehensive detection on leakage points of the roof in a test roof in sequence through various detection modes such as air pressure and water accumulation. According to the detection chamber, more leakage points on the metal roof can be detected, and the problems that according to a detection method of the metal roof in the prior art, it is difficult to detect the hidden leakage points, namely the leakage points which cannot leak water at the beginning of use, and the effect is poor when the process is completed are solved. Therefore, the accuracy of leakage point detection is improved, and the process improvement direction can be more accurately explored.

Description

Technical Field

[0001] This invention relates to the field of building technology, and in particular to a device and method for testing the waterproof performance of metal insulated roofs. Background Technology

[0002] Metal insulated roofs refer to roofs that use metal sheets as the roofing material, combining the structural layer and waterproofing layer into one. There are many types of metal sheets, including galvanized sheets, aluminized zinc sheets, aluminum alloy sheets, aluminum-magnesium alloy sheets, titanium alloy sheets, copper sheets, and stainless steel sheets. The surface of the sheets can be painted, and some metal roofs will also have an additional insulation layer to improve the insulation effect.

[0003] The structure of this type of metal roof, including its structural layer, insulation layer, and waterproof layer, is complex. Therefore, it needs to undergo waterproof performance testing before mass production. Traditional testing methods usually involve accumulating water on the roof and leaving a space under the roof to observe the permeability and thus determine the waterproof performance. However, this testing method is difficult to detect hidden leaks, i.e. leaks that do not leak when the product is first put into use, and is not effective when the process is improved. Summary of the Invention

[0004] To address the problem that existing testing methods for metal roofs are unable to detect hidden leaks (i.e., leaks that do not leak initially) and are ineffective when improving the process, this application provides a testing device for the waterproof performance of metal insulated roofs, the specific solution of which is as follows.

[0005] A device for testing the waterproof performance of metal insulated roofs includes a testing chamber, which is hollow inside. The testing chamber is hinged with a sealed door and has a fixing groove in the middle. The fixing groove is used to embed the test roof. When the test roof is embedded in the fixing groove and the sealed door is closed, the testing chamber is divided into two chambers by the test roof. A compressor and a vacuum pump are also installed on the side wall of the testing chamber. Both the vacuum pump and the compressor are located on the upper side of the fixed slot. The compressor is used to apply positive pressure, and the vacuum pump is used to apply negative pressure. Pressure gauges are installed on both the upper and lower sides of the fixed slot. The pressure gauges are used to detect the pressure of the chamber. The testing chamber has multiple mounting holes on the side wall above the fixed groove. Spray heads are embedded in the mounting holes and are used to spray water toward the test roof. Fans are also embedded in the mounting holes and are used to blow air toward the test roof. A return water hole is also provided on the inner wall of the testing chamber, and a return water pump connected to the spray head is installed in the return water hole.

[0006] By adopting the above technical solutions, the hollow test chamber with a hinged airtight door can seal the test environment. The fixed groove embeds the test roof, dividing the test chamber into two chambers, which facilitate the application of positive and negative pressure respectively. The compressor applies positive pressure, and the air pump applies negative pressure. With the help of a pressure gauge to detect the pressure, the presence of leaks in the test roof can be determined based on the pressure decay rate. The spray head sprays water and the fan blows air to simulate the actual environment and form water accumulation. The return water hole and return water pump can realize the recycling of water, thereby realizing the testing of the waterproof performance of the metal insulated roof. Air pressure testing makes it easier to find existing leaks, further improving the accuracy of the test and facilitating the improvement of the process.

[0007] Optionally, a driving component is provided at the top of the testing chamber, and a pressing plate is provided on the piston rod of the driving component. The driving component is used to drive the pressing plate to move in the vertical direction. The other side of the sealing ring is pressed against the inner wall of the testing chamber. The pressing plate does not interfere with the spray head and fan when it moves. A pressing airbag is also provided on the pressing plate, and the pressing airbag is used to abut against the pressing plate.

[0008] By adopting the above technical solution, the driving component drives the pressure plate to move in the vertical direction, which allows the pressure airbag on the pressure plate to come into contact with the test roof. This pressurizes the water accumulated above the test roof. In conjunction with other components of the testing device, it helps to collect data through water immersion sensors and drip sensors, and more accurately detect the waterproof performance. Moreover, the movement of the pressure plate does not interfere with the spray head and fan, and does not affect the spraying and blowing simulation operation.

[0009] Optionally, an airbag pump is also provided on the upper side of the clamping plate, and an inflation channel is provided inside the clamping plate. The inflation channel connects the airbag pump to the clamping airbag. The airbag pump is used to draw gas from the detection chamber into the clamping airbag and to expel gas from the clamping airbag.

[0010] By adopting the above technical solution, and setting up an airbag pump and inflation channel, gas in the test chamber can be drawn into the compression airbag or gas in the compression airbag can be expelled. This allows the compression airbag to be inflated and deflated as needed, pressurizing the water on the test roof. This facilitates a more accurate test of the waterproof performance of the test roof. Furthermore, the airbag pump and the test roof do not interfere with each other, ensuring the smooth progress of the test process.

[0011] Optionally, the compression airbags are equidistantly arranged on the compression plate and the compression airbags are interconnected. The airbag pumps are respectively arranged at both ends of the compression plate. The airbag pumps can be used for air intake and exhaust. When the airbag pumps are closed, the gas inside the compression airbags will not leak out. The airbag pumps at both ends can drive the compression airbags to expand sequentially to squeeze the liquid.

[0012] By adopting the above technical solution, the compressed airbag applies pressure evenly to the test roof, avoiding interference with the operation of the airbag pump. During the pressurization of accumulated water, it more effectively simulates the waterproofing of the test roof under different pressures, making it easier to collect data from the water immersion sensor and drip sensor to detect leaks. Furthermore, since the airbag pump is located at both ends, it can effectively generate a driving force for the liquid when filling and extracting gas, simulating the flow of liquid on the roof while pressurizing it, which is more in line with real-world usage scenarios and further improves the accuracy of the detection.

[0013] Optionally, the fixing slot is detachably equipped with a fixing frame, the fixing frame is configured to correspond to the shape of the test roof and is used to surround and wrap the test roof, an air inlet pipe is provided inside the fixing frame and extends into the test roof, a test gas pipe is provided inside the side wall of the detection chamber corresponding to the air inlet pipe, the test gas pipe is detachably connected to the air inlet pipe, the test gas pipe is used to introduce tracer gas into the test gas pipe, and a gas detector for detecting tracer gas is provided below the fixing frame.

[0014] By adopting the above technical solutions, the fixing slot can be detachably equipped with a fixing frame, which facilitates the replacement of different test roofs; the fixing frame surrounds and wraps around the test roof, which can fix and protect the test roof; the air inlet pipe extends into the test roof and is detachably connected to the test gas pipe, which facilitates the introduction of tracer gas into the test roof through the test gas pipe; a gas detector is set below the fixing frame, which can detect the tracer gas, thereby determining whether there are leaks in the test roof, and further improving the detection range.

[0015] Optionally, a heating element is provided inside the test tube for heating the gas inside the test tube. Corresponding connectors that can adhere to each other are provided on the test tube and the inlet tube. The connector on the inlet tube is fixedly connected to the inlet tube, while the connector on the test tube is slidably connected to the test tube. A sealing ring is provided on the connector of the test tube. The sealing ring includes a memory metal wire and a temperature-sensitive hydrogel. The memory metal wire is woven into a ring and wrapped by the temperature-sensitive hydrogel. The sealing ring will shrink when heated. One sealing ring is located between the connector and the test tube, and the other sealing ring is located corresponding to the inlet tube and can be embedded between the inlet tube and the connector.

[0016] By adopting the above technical solutions, heating elements are set to heat the tracer gas, which can accelerate molecular motion and allow the tracer gas to pass through areas with poor airtightness more quickly. At the same time, mutual adsorption connectors are set up for gas delivery after docking, reducing leakage. Additionally, a sealing ring that can contract according to temperature is set up. Through memory metal wire and temperature-sensitive hydrogel, it can mimic the adductor muscle of shell-forming organisms to repeatedly contract and seal, thereby continuously improving airtightness.

[0017] Optionally, a drip sensor is also provided at the bottom of the testing chamber. The drip sensor array is located on the lower side of the fixed frame. The drip sensor is used to detect dripping liquid. A camera is also provided at the bottom of the testing chamber. The camera is used to capture the wetting status of the test roof.

[0018] By adopting the above technical solution, drip sensors are arrayed on the lower side of the fixed frame to detect dripping liquid, thereby further determining the location of leaks in the test roof and improving the accuracy of process improvement. Since the color of the test roof will change significantly after being soaked in water, the camera can more easily identify the leaks.

[0019] Optionally, the drip sensor is further provided with a horizontal track on its upper side. The horizontal track is slidably connected to the detection chamber and can slide along the side wall of the detection chamber. An installation rod is slidably connected to the horizontal track. A simulated suction cup driven by an electric cylinder is slidably mounted on the installation rod. The simulated suction cup is used to abut against the metal roof. The simulated suction cup can form a sealed space on the metal roof. A weight sensor for detecting the weight of the simulated suction cup is provided on the installation rod corresponding to the simulated suction cup.

[0020] By adopting the above technical solution, a horizontal track is set up and a mounting rod is slidably connected to it. The simulated suction cup on the mounting rod presses and adsorbs the leak point, simulating the situation after the leak point is sealed. If no other leak points appear nearby after the leak point is sealed, it proves that the leak point only exists at that location. If a new leak point is generated, it proves that there are leak points in other locations as well. The weight sensor can detect the amount of water inside the simulated suction cup after the simulation is completed, further observing the leakage situation. Since the leak points are of different sizes, when water enters, the liquid is easily guided to the large leak point, causing the small leak point to go unnoticed. Therefore, new leak points may be generated after the leak is repaired. Simulating the situation after the leak is repaired can further confirm other leak points, which is more helpful for improving the wall surface.

[0021] Optionally, the mounting rod is also equipped with a simulated injection needle. When the simulated suction cup comes into contact with the metal roof, the simulated injection needle can penetrate the metal roof. The mounting rod is equipped with an adhesive storage tank, which can store and heat the sealant. The simulated injection needle can pump the sealant into the metal roof.

[0022] By adopting the above technical solutions and setting up simulated glue injection needles, the position of the suction cup can be fixed, and the sealant can be injected into the leak point. After the sealant is injected, since the liquid cannot overflow from the leak point, it may seek other paths and create new leak points, which can further discover the defects of the wall and thus provide further assistance for the improvement of the wall.

[0023] This application also provides a method for testing the waterproof performance of metal insulated roofs, including the aforementioned testing device for the waterproof performance of metal insulated roofs, and employing the following method: A. Install the test roof onto the fixing frame, then embed the test roof into the fixing groove along with the fixing frame, close the airtight door and confirm the airtightness of the test room; B. Gas is injected through a compressor to create positive pressure on the upper side of the test roof. After positive pressure is created, the air pressure on both sides of the roof is tested. The pressure decay rate on the positive pressure side is used to determine whether there is a leak. If the pressure decay rate is too large, it proves that there is a significant leak and no further testing is required. C. Restore the air pressure, and then use an air pump to create negative pressure on the upper side of the test roof. Perform air pressure judgment in the same way as in step B. If the pressure decay rate is too large, it proves that the leak is obvious and no further testing is needed. D. Restore the air pressure, introduce tracer gas into the test roof through the fixed frame, and wait for a period of time before using a gas detector to determine the concentration of the tracer gas and thus determine whether there is a leak. E. Start the sprinkler head and start the fan to simulate blowing. After water accumulates on the upper side of the test roof, stop blowing. The water sprayed by the sprinkler head needs to be mixed with litmus solution. At the same time, the fixed frame fills the test roof with carbon dioxide gas, and the camera captures the bottom of the test roof. F. After standing, read the drip sensor. The part of the liquid detected by the drip sensor can be identified as the leak point. At this time, the simulated suction cup and simulated glue injection are used to simulate the leak point. After the leak is repaired, the position of the simulated suction cup is maintained. G. Start the drive unit. While lowering the clamping plate, start one of the airbag pumps. At this time, the airbag pump on the other end will turn off. The clamping airbags will expand one by one from the activated airbag pump to the other end, and then the airbag pump on the other end will expel the gas. When the gas is expelled, the clamping airbags will also drive the liquid to move. After the gas is completely expelled, the airbag pump on the side that expelled the gas will re-expel the gas. Repeat the above operation to continuously squeeze the liquid. Then observe the situation inside the simulated suction cup and collect the data from the drip sensor again. If a new leak appears, repeat steps F and G until the leak no longer exists. Finally, collect the leak repair data and optimize the wall surface accordingly.

[0024] By adopting the above technical solutions, leaks can be identified more accurately. Since some leaks may have insufficient air tightness but do not actually leak water, multiple different experiments are needed for identification. Some leaks may not be directly on the surface and may leak into the interior of the roof. After repairing the leaks, new leaks may easily occur. Therefore, the above methods can provide more data support for improving the wall surface process.

[0025] In summary, this application has at least the following beneficial effects: This application solves the problem that existing metal roofing inspection methods are difficult to detect hidden leaks, i.e. leaks that do not leak at the beginning of use, and are ineffective when improving the process. This application improves the accuracy of leak detection by setting up an inspection chamber that can detect metal roof leaks in multiple ways, thereby enabling more precise exploration of the direction of process improvement. This application also detected the diffusion of water leakage at the leak point, which allowed for further observation of the impact of the leak point on the surrounding roof, thereby further improving the process and enhancing the waterproof performance of the improved roof. Attached Figure Description

[0026] Figure 1 This is a perspective view of this embodiment.

[0027] Figure 2 This is a cross-sectional view of this embodiment.

[0028] Figure 3 This is a cross-sectional view of this embodiment.

[0029] Figure 4 This is a three-dimensional view of the air intake pipe and the test air pipe in this embodiment.

[0030] Figure 5 This is a cross-sectional view of the air intake pipe and the test air pipe in this embodiment.

[0031] Explanation of reference numerals in the attached figures: 1. Testing chamber; 11. Airtight door; 12. Compressor; 13. Air pump; 14. Mounting hole; 141. Spray head; 142. Fan; 15. Water return hole; 151. Water return pump; 16. Pressure gauge; 17. Drive unit; 171. Pressure plate; 172. Airbag pump; 173. Inflation channel; 174. Pressure airbag; 18. Horizontal track; 181. Mounting rod; 182. Simulated suction cup; 183. Simulated glue injection needle; 184. Glue storage tank; 19. Camera; 2. Fixing slot; 21. Fixing frame; 211. Air inlet pipe; 22. Test air pipe; 221. Heating element; 222. Connector; 223. Sealing ring; 23. Gas detector; 24. Leakage sensor; 3. Test the roof. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] A device for testing the waterproof performance of metal insulated roofs, such as Figure 1 and Figure 2As shown, the test chamber 1 is hollow inside and has a hinged airtight door 11. A fixing groove 2 is located in the middle of the test chamber 1 and is used to embed a test roof 3. When the airtight door 11 is closed after the test roof 3 is embedded in the fixing groove 2, the test chamber 1 is divided into two chambers by the test roof 3. The air pressure of the two chambers is isolated from each other. A compressor 12 and a vacuum pump 13 are also installed on the side wall of the test chamber 1, both positioned above the fixing groove 2. The compressor 12 applies positive pressure, and the vacuum pump 13 applies negative pressure. Pressure gauges 16 are installed on both the upper and lower sides of the fixing groove 2 to detect the pressure in their respective chambers. In practice, the air pump 13 and compressor 12 need to be used with the matching kit. Since the kit is common in the prior art, it will not be described in detail. A positive or negative pressure is formed on the upper side of the test roof 3, and then the air pressure change on that side of the test roof 3 is detected. When the air pressure change efficiency is large, it proves that there is a significant leak. If the change rate is low, further detection of the leak is required. The pressure gauge 16 can be a common air pressure tester on the market.

[0034] like Figure 2 and Figure 3 As shown, the testing chamber 1 has multiple mounting holes 14 on the side wall above the fixing groove 2. Spray heads 141 are embedded in the mounting holes 14, spraying water towards the test roof 3. Fans 142 are also embedded in the mounting holes 14, blowing air towards the test roof 3. A return water hole 15 is also provided on the inner wall of the testing chamber 1, housing a return water pump 151 connected to the spray heads 141. In practice, the spray heads 141 are connected to the outside via water pipes, with the connection sealed airtight. The drain hole is positioned on the upper side of the test roof 3, allowing the return water pump 151 to recycle and reuse the liquid during pumping. The test can simulate windy and rainy weather. During observation, a camera can be installed inside to monitor the water level at the bottom, or a liquid sensor can be used to detect any leakage.

[0035] like Figure 2 and Figure 3As shown, a drive unit 17 is installed at the top of the testing chamber 1. A pressure plate 171 is installed on the piston rod of the drive unit 17. The drive unit 17 is used to drive the pressure plate 171 to move vertically. The other side of the sealing ring is pressed against the inner wall of the testing chamber 1. When the pressure plate 171 moves, it does not interfere with the spray head 141 and the fan 142. A pressure airbag 174 is also installed on the pressure plate 171. The pressure airbag 174 is used to abut against the pressure plate 171. An airbag pump 172 is also installed on the upper side of the pressure plate 171. An inflation channel 173 is provided inside the pressure plate 171. The inflation channel 173 connects the airbag pump 172 and the pressure airbag 174. The airbag pump 172 is used to draw gas from the testing chamber 1 into the pressure airbag 174 and to expel gas from the pressure airbag 174. When the pressure airbag 174 abuts against the test roof 3, the airbag pump 172 and the test roof 3 do not interfere with each other. The compression airbags 174 are evenly spaced on the compression plate 171. In specific implementation, the driving component 17 includes a cylinder or a hydraulic cylinder. Since the supporting components are relatively common in the market, they will not be described in detail. However, attention should be paid to the sealing of the parts connected to the outside to improve the sealing effect and reduce the possibility of failure to seal. The compression airbags 174 can squeeze the accumulated water to test for water leakage. After expansion, the compression airbags 174 are thicker than the airbag pump 172. The compression airbags 174 will contact the test roof before the airbag pump 172.

[0036] like Figure 2 and Figure 3 As shown, the compression airbags 174 are equidistantly arranged on the compression plate 171 and are interconnected. Airbag pumps 172 are respectively located at both ends of the compression plate 171. Both airbag pumps 172 can be used for air intake and exhaust. When the airbag pumps 172 are closed, the gas inside the compression airbags 174 will not leak out. The airbag pumps 172 at both ends can drive the compression airbags 174 to expand sequentially, compressing the liquid. In specific implementation, when the airbag pumps 172 are inflated, each compression airbag 174 can expand according to the direction of gas flow, thereby pushing the liquid to flow, simulating the real flow of liquid on the roof. Simultaneously, pressurization is applied, which can better simulate severe water accumulation during heavy rain. The alternating inflation and deflation of the two airbag pumps 172 can achieve the back-and-forth flow of the liquid, further improving the accuracy of the detection.

[0037] like Figure 2 and Figure 3As shown, the fixing slot 2 is detachably equipped with a fixing frame 21. The fixing frame 21 is set to correspond to the shape of the test roof 3 and is used to surround and wrap the test roof 3. An air inlet pipe 211 is set inside the fixing frame 21 and extends into the test roof 3. A test gas pipe 22 is set inside the side wall of the detection chamber 1 corresponding to the air inlet pipe 211. The test gas pipe 22 is detachably connected to the air inlet pipe 211. The test gas pipe 22 is used to introduce tracer gas into the test gas pipe 22. A gas detector 23 for detecting tracer gas is set below the fixing frame 21. In practice, the fixed frame 21 and the test gas pipe 22 are driven by a cylinder assembly to move up and down. The connection is sealed with a sealing ring or similar device. The tracer gas can be ammonia or other easily detectable gases. The gas detector 23 can be fixed and is installed in a side wall hole near the test roof 3. The gas detector 23 can detect the concentration of the tracer gas. Based on the gas concentration, it can be determined whether there is a leak inside the wall. The gas supply to the test gas pipe 22 is achieved through a gas cylinder or an external pipeline. Attention should be paid to sealing at the location of the external pipeline.

[0038] like Figure 4 and Figure 5 As shown, a heating element 221 is installed inside the test air tube 22. The heating element 221 is used to heat the gas inside the test air tube 22. The test air tube 22 and the air inlet tube 211 are respectively provided with connectors 222 that can be attracted to each other. The connector 222 on the air inlet tube 211 is fixedly connected to the air inlet tube 211, while the connector 222 on the test air tube 22 is slidably connected to the test air tube 22. A sealing ring 223 is provided on the connector 222 on the test air tube 22. The sealing ring 223 includes a memory metal wire and a temperature-sensitive hydrogel. The memory metal wire is woven into a ring and wrapped by the temperature-sensitive hydrogel. The sealing ring 223 will shrink when heated. One sealing ring 223 is set between the connector 222 and the test air tube 22, and the other sealing ring 223 is set corresponding to the air inlet tube 211 and can be embedded between the air inlet tube 211 and the connector 222. In practical implementation, the heating element 221 can be a PTC or other fast-responding element to heat the tracer gas, which can accelerate molecular motion and allow the tracer gas to pass through areas with poor airtightness more quickly, improving test efficiency. After the heated gas comes into contact with the memory metal wire and the temperature-sensitive hydrogel, the sealing ring 223 can mimic the adductor muscle of shellfish to repeatedly contract and reseal, thus continuously achieving a seal. While maintaining ventilation, it can continuously perform self-sealing, reducing the possibility of the seal loosening due to gas impact. At the same time, even if there is a temperature difference and water affects the sealing effect, it can continuously contract and reseal, improving airtightness and reducing the impact of fast-moving tracer gas on test accuracy.

[0039] like Figure 2 and Figure 3As shown, a drip sensor 24 is also installed at the bottom of the detection chamber 1. The array of drip sensors 24 is arranged on the lower side of the fixed frame 21. The drip sensors 24 are used to detect dripping liquid. In specific implementation, the dripping liquid is detected by the drip sensor 24. Commonly available models of this type of sensor can be used.

[0040] like Figure 2 and Figure 3 As shown, a horizontal track 18 is also provided on the upper side of the drip sensor 24. The horizontal track 18 is slidably connected to the detection chamber 1 and can slide along the side wall of the detection chamber 1. An installation rod 181 is slidably connected to the horizontal track 18. A simulated suction cup 182 driven by an electric cylinder is slidably installed on the installation rod 181. The simulated suction cup 182 is used to abut against the metal roof. The simulated suction cup 182 can form a sealed space on the metal roof. A weight sensor is provided on the installation rod 181 corresponding to the simulated suction cup 182 to detect the weight of the simulated suction cup 182. The weight sensor can weigh the water leaking from the leak point during the simulated leak sealing after the simulation is completed, so as to further determine the leakage situation. A simulated glue injection needle 183 is also provided on the installation rod 181. When the simulated suction cup 182 abuts against the metal roof, the simulated glue injection needle 183 can penetrate the metal roof. A glue storage tank 184 is provided on the installation rod 181. The glue storage tank 184 can store and heat the sealant. The simulated glue injection needle 183 can pump the sealant into the metal roof. In specific implementation, the simulated injection needle 183 is positioned in the middle of the simulated suction cup 182, and can be encased by the simulated suction cup 182 and the metal roof. A pressure pump is installed between the glue storage tank 184 and the simulated injection needle 183. Both the glue storage tank 184 and the simulated injection needle 183 are equipped with heating copper wires, enabling the heat-melting of the sealant into the metal roof. The sealant can be a polyurethane-based adhesive, which has good waterproofing properties and can maintain its shape. Pumped into the wall, it can quickly seal leaks along the gaps. In other embodiments, the sealant can also be removed from the metal roof. Modeling based on the shape of the sealant can reconstruct the internal condition of the metal roof, thereby providing data for further optimization of the metal roof.

[0041] like Figure 2 and Figure 3 As shown, a camera 19 is also installed at the bottom of the testing chamber 1. The camera 19 is used to photograph the wettability of the test roof 3. The camera 19 is electrically connected to the moving rod 26. In specific implementation, the camera 19 is installed on the side wall at the bottom of the testing chamber 1, without interfering with other structures, and can be used to photograph the bottom of the test roof 3. The camera 19 can be equipped with a flash, or lighting can be directly installed inside the testing chamber 1 to facilitate photography.

[0042] This embodiment also provides a method for testing the waterproof performance of metal insulated roofs, including the aforementioned testing device for the waterproof performance of metal insulated roofs, and employing the following method: A method for testing the waterproof performance of metal insulated roofs, comprising the testing device for the waterproof performance of metal insulated roofs as described in any one of claims 1-9, and employing the following method: A. Install the test roof 3 onto the fixing frame 21, and then embed the test roof 3 into the fixing groove 2 together with the fixing frame 21. Close the airtight door 11 and confirm the airtightness of the test chamber 1. B. Gas is injected through compressor 12 to form positive pressure on the upper side of the test roof 3. After positive pressure is formed, the air pressure on both sides of the roof 3 is tested. The pressure decay rate on the positive pressure side is used to determine whether there is a leak. When the pressure decay rate is too large, it proves that there is a significant leak and no further testing is required. C. Restore the air pressure, and then use the air pump 13 to create a negative pressure on the upper side of the test roof 3. Perform the air pressure judgment in the same way as step B. If the pressure decay rate is too large, it proves that the leak is obvious and no further testing is needed. D. Restore the air pressure, introduce tracer gas into the test roof 3 through the fixed frame 21, and after a period of time, use the gas detector 23 to determine the concentration of the tracer gas to determine whether there is a leak. E. Start the spray head 141 and start the fan 142 to simulate blowing. After water accumulates on the upper side of the test roof 3, stop blowing. The water sprayed by the spray head 141 needs to be mixed with litmus solution. At the same time, the fixed frame 21 fills the test roof 3 with carbon dioxide gas. The camera 19 shoots the bottom of the test roof 3. Move the water immersion sensor 24 to the color change position. The water immersion sensor 24 is used to further detect the leakage. Since litmus changes color when it comes into contact with carbon dioxide, obvious color spots will appear on the test roof 3. The location of the seepage can be located by shooting the test roof 3 with the flash of the camera 19. F. After standing, read the drip sensor 24. The part of the drip sensor 24 that detects liquid can be identified as the leak point. At this time, the simulated suction cup 182 and the simulated glue injection needle 183 simulate the leak point to repair it. After repairing the leak, keep the position of the simulated suction cup 182. In other embodiments, the repaired area can be broken to remove the repair glue. The shape of the repair glue can be modeled to restore the repaired shape. Based on this modeling, the production of the metal roof can be further optimized.

[0043] G. Start the drive unit 17. While lowering the clamping plate 171, start one of the airbag pumps 172. At this time, the airbag pump 172 at the other end is turned off. The clamping airbags 174 will expand one by one from the activated airbag pump 172 to the other end, and then the airbag pump 172 at the other end will expel the gas. When the gas is expelled, the clamping airbag 174 will also drive the liquid to move. After the gas is expelled, the airbag pump 172 on the side where the gas was expelled will re-expel the gas. Repeat the above operation to continuously squeeze the liquid. Then observe the situation inside the simulated suction cup 182 and collect the data of the drip sensor 24 again. If a new leak appears, repeat steps F and G until the leak no longer exists. Finally, count the leak repair data and optimize the wall accordingly.

[0044] Working principle: By setting up a detection chamber 1 that can detect leaks in metal roofs in multiple ways, the accuracy of leak detection is improved, allowing for more precise exploration of the direction of process improvement, screening out areas that may have leaks, observing their internal processes, and finding solutions.

[0045] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for testing the waterproof performance of metal insulated roofs, characterized in that: Including detection chamber (1), the inside hollow setting, the detection chamber (1) hinged setting has airtight door (11), the detection chamber (1) is opened in fixed slot (2), the fixed slot (2) is arranged in the middle part of detection chamber (1), the fixed slot (2) is used for embedding test roof (3), when closing airtight door (11) after test roof (3) is embedded in the fixed slot (2), the detection chamber (1) is divided into two chambers by test roof (3); The sidewall of the detection chamber (1) is also provided with a compressor (12) and a gas suction pump (13), the gas suction pump (13) and the compressor (12) are arranged on the upper side of the fixed slot (2), the compressor (12) is used for applying positive pressure, the gas suction pump (13) is used for applying negative pressure, the upper and lower sides of the fixed slot (2) are provided with pressure gauges (16), the pressure gauges (16) are used for detecting the pressure of the chamber. The sidewall of the detection chamber (1) on the upper side of the fixed slot (2) is also provided with a plurality of mounting holes (14), the mounting holes (14) are embedded with spray heads (141), the spray heads (141) are used for spraying water towards the test roof (3), the mounting holes (14) are also embedded with fans (142), the fans (142) are used for blowing towards the test roof (3), the inner wall of the detection chamber (1) is also provided with a water return hole (15), the water return hole (15) is provided with a water return pump (151) communicated with the spray head (141).

2. The metal thermal insulation roof waterproof performance detection device according to claim 1, characterized in that: The top of the detection chamber (1) is provided with a driving member (17), the piston rod of the driving member (17) is provided with a pressing plate (171), the driving member (17) is used for driving the pressing plate (171) to move in the vertical direction, the other side of the sealing ring abuts against the inner wall of the detection chamber (1), the pressing plate (171) moves without interfering with the spray head (141) and the fan (142), the pressing plate (171) is also provided with a pressing air bag (174), the pressing air bag (174) is used for abutting against the pressing plate (171).

3. The metal thermal insulation roof waterproof performance detection device according to claim 2, characterized in that: The upper side of the pressing plate (171) is also provided with an air bag pump (172), the pressing plate (171) is provided with an inflation flow channel (173), the inflation flow channel (173) communicates the air bag pump (172) with the pressing air bag (174), the air bag pump (172) is used for extracting the gas in the detection chamber (1) into the pressing air bag (174) and discharging the gas in the pressing air bag (174).

4. The metal thermal insulation roof waterproof performance detection device according to claim 3, characterized in that: The pressing air bags (174) are equidistantly spaced on the pressing plate (171) and are communicated with each other, the air bag pumps (172) are respectively arranged at both ends of the pressing plate (171), the air bag pumps (172) can be used for air intake and air discharge, the gas in the pressing air bag (174) will not leak out when the air bag pump (172) is closed, the air bag pumps (172) at both ends can drive the pressing air bag (174) to expand in sequence and press the liquid.

5. The metal thermal insulation roofing waterproof performance detection device according to claim 1, characterized in that: The fixed groove (2) is detachably provided with a fixed frame (21), the fixed frame (21) is provided corresponding to the shape of the test roof (3) and is used to wrap around the test roof (3), the fixed frame (21) is provided with an air inlet pipe (211), the air inlet pipe (211) extends into the test roof (3), the test gas pipe (22) is provided in the side wall of the detection chamber (1) corresponding to the air inlet pipe (211), the test gas pipe (22) is detachably connected with the air inlet pipe (211), the test gas pipe (22) is used for introducing tracer gas into the test gas pipe (22), and the lower side of the fixed frame (21) is provided with a gas detector (23) for detecting the tracer gas.

6. The metal thermal insulation roofing waterproof performance detection device according to claim 5, characterized in that: The test gas pipe (22) is provided with a heating element (221), the heating element (221) is used for heating the gas in the test gas pipe (22), the test gas pipe (22) and the air inlet pipe (211) are provided with corresponding docking heads (222) which can be adsorbed to each other, the docking head (222) on the air inlet pipe (211) is fixedly connected with the air inlet pipe (211), and the docking head (222) on the test gas pipe (22) is slidably connected with the test gas pipe (22). The docking head (222) on the test gas pipe (22) is provided with a sealing ring (223), the sealing ring (223) comprises a memory wire and a temperature-sensitive hydrogel, the memory wire is woven into a ring and is wrapped with the temperature-sensitive hydrogel, the sealing ring (223) will shrink after being heated, one of the sealing rings (223) is arranged between the docking head (222) and the test gas pipe (22), and the other of the sealing rings (223) is arranged corresponding to the air inlet pipe (211) and can be embedded between the air inlet pipe (211) and the docking head (222).

7. The metal thermal insulation roofing waterproof performance detection device according to claim 6, characterized in that: The bottom of the detection chamber (1) is also provided with a drip sensor (24), the drip sensor (24) is arranged on the lower side of the fixed frame (21), the drip sensor (24) is used for detecting the dripping liquid, and the bottom of the detection chamber (1) is also provided with a camera (19), the camera (19) is used for shooting the wetting condition of the test roof (3).

8. The metal thermal insulation roofing waterproof performance detection device according to claim 7, characterized in that: The upper side of the drip sensor (24) is also provided with a transverse rail (18), the transverse rail (18) is slidably connected in the detection chamber (1) and can slide along the side wall of the detection chamber (1), the mounting rod (181) is slidably connected on the transverse rail (18), the analog suction cup (182) driven by the electric cylinder is slidably arranged on the mounting rod (181), the analog suction cup (182) is used for abutting against the metal roof, the analog suction cup (182) can form a sealed space on the metal roof, and the weight sensor for detecting the weight of the analog suction cup (182) is arranged on the mounting rod (181) corresponding to the analog suction cup (182).

9. The device for detecting waterproofing performance of a metal thermal insulation roof according to claim 8, characterized in that: The installation rod (181) is also provided with a simulated glue injection needle (183), the simulated glue injection needle (183) can penetrate into the metal roof when the simulated suction cup (182) abuts against the metal roof, the installation rod (181) is provided with a glue storage tank (184), the glue storage tank (184) can store and heat the leak repairing glue, and the simulated glue injection needle (183) can pump the leak repairing glue towards the metal roof.

10. A method for detecting waterproofing performance of a metal thermal insulation roof, characterized in that: The metal thermal insulation roof waterproof performance detection device comprises the metal thermal insulation roof waterproof performance detection device according to any one of claims 9, and the following method is adopted: A, the test roof (3) is installed on the fixed frame (21), then the test roof (3) is embedded into the fixed groove (2) together with the fixed frame (21), the airtight door (11) is closed and the airtightness in the detection chamber (1) is confirmed; B, the gas is filled through the compressor (12) to form a positive pressure on the upper side of the test roof (3), after the positive pressure is formed, the pressure decay rate of the gas pressure on both sides of the test roof (3) is determined to determine whether there is a leak point, when the pressure decay rate is too large, it is proved that the leak point is obvious, and subsequent test is not needed; C, the gas pressure is restored, then the negative pressure on the upper side of the test roof (3) is formed through the air pump (13), and the gas pressure is determined in the same way as in the step B, when the pressure decay rate is too large, it is proved that the leak point is obvious, and subsequent test is not needed; D, the gas pressure is restored, the tracer gas is introduced into the test roof (3) through the fixed frame (21), after a period of time, the concentration of the tracer gas is determined through the gas detector (23), so as to determine whether there is a leak point; E, the spray head (141) is started and the fan (142) is started to simulate blowing, after water is formed on the upper side of the test roof (3), the blowing is stopped, the water sprayed by the spray head (141) needs to be mixed with litmus solution, at the same time, the fixed frame (21) fills the carbon dioxide gas into the test roof (3), and the camera (19) shoots the bottom of the test roof (3); F, after standing, the drip sensor (24) is read, the part where the drip sensor (24) detects the liquid can be determined as a leak point, at this time, the simulated suction cup (182) and the simulated glue injection needle (183) simulate leak repair on the leak point, and the position of the simulated suction cup (182) is kept after the leak repair; G, the driving part (17) is started, the pressing plate (171) is lowered, and the gas bag pump (172) at one end is started at the same time, at this time, the gas bag pump (172) at the other end is closed, the pressing gas bag (174) will expand from one end to the other end of the started gas bag pump (172), and then the gas is discharged through the gas bag pump (172) at the other end, when the gas is discharged, the pressing gas bag (174) also drives the liquid to move, after the gas is discharged, the gas bag pump (172) on the side where the gas is discharged is re-pumped, the liquid is continuously extruded through the above operation, then the situation in the simulated suction cup (182) is observed, and the data of the drip sensor (24) is collected again, if a new leak point appears, the steps F and G are repeated until there is no leak point, finally, the leak repair data is counted and the wall surface is optimized according to the data.

Images