A waterproof roll lap joint waterproof precision detection device and detection method

Abstract

The application discloses a waterproof coiled material lap joint waterproof precision detection device and method, and relates to the field of waterproof coiled material detection. The waterproof coiled material lap joint waterproof precision detection device comprises a detection table, a detection cavity is formed in the detection table, the upper end of the detection cavity is of an open structure, a positioning groove is formed in the upper position of the detection table and corresponds to the detection cavity, a leakage pressing disc is arranged in the positioning groove, a pressing plate is detachably connected to the positioning groove, a plurality of groups of detection cavities are equidistantly arranged along the length direction of the detection table, and the positioning groove, the leakage pressing disc and the pressing plate are respectively and correspondingly arranged in cooperation with each group of detection cavities. Through the arrangement of the plurality of groups of detection cavities, the electrical cooperation of the switchable mode boosting unit, the induction unit and the prompt lamp, the synchronous or single independent detection of the plurality of groups of coiled materials is realized, the detection efficiency and precision are improved, and the waterproof performance of the lap joint can be directly determined.

Description

Technical Field

[0001] This invention belongs to the field of waterproof membrane testing technology, specifically, it relates to a device and method for accurately detecting the impermeability of waterproof membrane overlap joints. Background Technology

[0002] As a core material in building waterproofing projects, the sealing performance of the overlap joints of waterproof membranes directly determines the overall waterproofing effect. If there is a risk of leakage at the overlap joints, rainwater will seep into the building structure, causing problems such as mold growth on the walls and structural corrosion, which will seriously affect the service life and safety of the building. Therefore, conducting impermeability testing on the overlap joints of waterproof membranes is a key step in the construction and acceptance process of waterproofing projects.

[0003] Currently, the industry generally uses specialized testing equipment to test the waterproof performance of waterproof membrane overlap joints. By simulating the water pressure environment in actual use, the sealing reliability of the overlap joints is tested, providing a basis for quality control of waterproof projects. However, existing waterproof membrane overlap joint waterproofing testing devices mostly require testing personnel to observe the leakage inside the testing chamber at close range during actual use, or to make a judgment through complex instrument readings. This is not only cumbersome to operate, but also prone to human observation errors and instrument reading delays, making it impossible to quickly and intuitively determine whether there is leakage at the overlap joint, and thus failing to meet the needs of efficient and accurate testing. Summary of the Invention

[0004] The technical problem that this invention aims to solve in response to the above-mentioned prior art is that the existing waterproof membrane overlap joint waterproofing detection devices have cumbersome judgment methods, are prone to errors and delays, and cannot quickly and intuitively determine whether the overlap joint is leaking.

[0005] To address the aforementioned problems, this invention provides a precise detection device for the impermeability of waterproof membrane overlap joints, comprising a detection platform with a detection cavity. The detection cavity has an open upper end. A positioning groove is formed on the detection platform above the detection cavity, and a leakage pressure plate is placed inside the positioning groove. A clamping plate is detachably connected to the positioning groove. Multiple sets of detection cavities are equidistantly arranged along the length of the detection platform. The positioning groove, leakage pressure plate, and clamping plate are respectively configured to cooperate with each set of detection cavities. A seepage groove is formed on the end face of the clamping plate above the leakage pressure plate. The testing platform is equipped with a pressurization unit, which is used to simultaneously pressurize water to multiple testing chambers or independently pressurize water to a single testing chamber. Indicator lights are installed on the side walls of the testing platform, and a sensing unit is also installed inside. This sensing unit is used to detect leakage at the overlap joints of the waterproof membrane in real time during the testing process. The sensing unit and the indicator lights are electrically coordinated. During testing, if the overlap joints of the waterproof membrane are well sealed and leak-free, the indicator lights remain lit; if leakage occurs at the overlap joints, the indicator lights turn off, thus providing a direct visual assessment of the waterproof performance of the overlap joints.

[0006] As a further improvement of this application, the sensing unit includes a detection cylinder, a first conductive ring, and a second conductive ring. A piston disc is slidably connected inside the detection cylinder. The first conductive ring is fixedly connected to the piston disc. The second conductive ring is disposed on the inner wall of the detection cylinder and located above the first conductive ring. A spring is provided inside the detection cylinder. One end of the spring is fixedly connected to the piston disc, and the other end is fixedly connected to the inner wall of the detection cylinder. The detection cylinder is connected to the detection cavity through an interconnecting pipe. The detection cylinder is fixedly connected to the inner wall of the detection platform. The first conductive ring and the second conductive ring are used to control the switching of the indicator light.

[0007] As a further improvement of this application, an observation groove is provided on the upper surface of the pressing plate, and a seepage hole is provided inside the pressing plate. One end of the seepage hole is connected to the seepage groove, and the other end is connected to the observation groove. During the testing operation, if leakage occurs at the overlap of the waterproof membrane, the water that enters the testing chamber after being pressurized will pass through the leakage pressure plate and flow into the seepage groove, and then be guided into the observation groove through the seepage hole, making it easy to observe the leakage phenomenon directly.

[0008] As a further improvement of this application, the observation slot is cone-shaped, a floating ball is placed inside the observation slot, and a sealing cover is installed on the clamping plate. The sealing cover is made of transparent material and can form a sealed shield and protection for the observation slot.

[0009] As another improvement of this application, the lower end face of the pressing plate is provided with a sealing gasket, the sealing gasket is in contact with the upper end face of the leakage pressure plate, the lower end face of the pressing plate is provided with a groove, and an expansion airbag is provided inside the groove. After the expansion airbag is inflated, it can squeeze the sealing gasket, so that the sealing gasket is tightly in contact with the upper end face of the leakage pressure plate.

[0010] As a further improvement to this application, the upper surface of the pressure plate is provided with multiple sealing grooves at equal intervals. The sealing grooves are configured with a V-shaped structure. The sealing gasket deforms under compression and can be embedded into the sealing grooves accordingly, further enhancing the sealing performance of the contact surface.

[0011] As a further improvement to this application, the detection cylinder has an air supply chamber located below the piston disc, and the detection cylinder is provided with a pipe connected to the air supply chamber. The end of the pipe away from the air supply chamber is connected to the expansion airbag. The air supply chamber stores compressed gas, which can stably supply gas to the expansion airbag.

[0012] As a further improvement to this application, the pressurization unit includes a water pump installed inside the testing platform. A water supply pipe is connected to the bottom of each testing chamber, and a solenoid valve is installed on the water supply pipe. The end of each water supply pipe away from the testing chamber is connected to the outlet of the water pump. The inlet of the water pump is used to connect to an external water source. The testing platform is provided with a drain pipe that is connected to each testing chamber. The end of the drain pipe away from the testing chamber extends to the outside of the testing platform, and a valve switch for controlling opening and closing is installed on the drain pipe.

[0013] As a further improvement to this application, a fixing bolt is fixedly connected to the testing platform, and an installation hole adapted to the fixing bolt is provided on the clamping plate. A locking nut is threaded to one end of the fixing bolt that passes through the installation hole.

[0014] The testing method for the waterproof membrane overlap joint impermeability precision testing device includes the following operating steps: Step 1: Cut the overlapping part of the waterproof membrane to be tested to match the size of the testing chamber, and place it at the opening of each testing chamber, so that the overlapping seam is aligned with the hollow area of ​​the leak pressure plate; Step 2: Place the pressure plate into the positioning slot, press it to fit the surface of the roll material, install and fix the clamping plate to complete the positioning and clamping; Step 3: Select the synchronous or independent water supply pressurization mode through the pressurization unit, start the pressurization unit to inject water into the detection chamber to pressurize it, and simulate the actual water pressure environment. Step 4: During the inspection, the sensor unit and the indicator light work together to determine whether the joint is sealed properly and there is no leakage. If the indicator light stays on, the joint is sealed properly and there is no leakage. If the indicator light goes out, there is leakage and the waterproofing is not up to standard. Step 5: Turn off the pressurization unit, drain the water from the test chamber, remove the clamping plate and the leak pressure plate, take out the tested waterproof membrane, and the test is complete.

[0015] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: This invention achieves simultaneous or independent testing of multiple rolls of material by setting up multiple testing chambers and electrically coordinating a switchable pressurization unit, a sensing unit, and an indicator light, thereby improving testing efficiency and accuracy, and providing a direct assessment of the waterproof performance of the overlap joints. This invention achieves rapid response and accurate feedback on leakage through a mechanical sensing unit composed of a detection cylinder, piston disc, conductive ring, etc. It has a simple structure, low failure rate, is suitable for humid detection environments, and is energy-saving and stable. This invention increases the visibility of leakage observation channels and amplifies the visual effect of leakage by setting a seepage groove, seepage hole and observation groove on the pressure plate, and setting the observation groove to be conical, adding floating ball and transparent sealing cover, thereby improving the sensitivity of minor leakage detection, avoiding misjudgment caused by indicator light failure, and facilitating the recording of leakage degree, investigation of leakage location and protection and cleaning of observation area.

[0016] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the testing station of the present invention. Figure 1 ; Figure 3 This is a cross-sectional view of the testing station of the present invention. Figure 2 ; Figure 4 This is a cross-sectional view of the testing platform, the defect pressure plate, and the clamping plate of the present invention; Figure 5 This is a partial structural diagram of the present invention. Figure 1 ; Figure 6 This is a partial structural diagram of the present invention. Figure 2 ; Figure 7 This is the present invention. Figure 2 Enlarged view of section A.

[0018] In the picture: 1. Testing table; 101. Testing chamber; 102. Positioning slot; 103. Leakage pressure plate; 104. Pressing plate; 2. Fixing bolts; 201. Locking nut; 3. Water pump; 301. Water supply pipe; 302. Drainage pipe; 4. Seepage trough; 401. Seepage hole; 402. Observation trough; 403. Sealing cover; 404. Floating ball; 5. Detection cylinder; 501. Piston disc; 502. Conductive ring one; 503. Conductive ring two; 504. Spring; 505. Interconnecting pipe; 506. Indicator light; 6. Sealing gasket; 601. Inflatable airbag; 602. Pipe; 603. Sealing groove. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] Figures 1-5 The invention illustrates a device for accurately detecting the impermeability of waterproof membrane overlap joints, comprising a testing platform 1, a testing cavity 101 on the testing platform 1, the upper end of the testing cavity 101 being an open structure, a positioning groove 102 on the testing platform 1 corresponding to the position above the testing cavity 101, a leakage pressure plate 103 disposed inside the positioning groove 102, and a clamping plate 104 detachably connected to the positioning groove 102. Multiple sets of testing cavities 101 are equidistantly arranged along the length direction of the testing platform 1. The positioning groove 102, the leakage pressure plate 103, and the clamping plate 104 are respectively configured to cooperate with each set of testing cavities 101. A seepage groove 4 is provided on the end face of the clamping plate 104 above the leakage pressure plate 103 to facilitate the collection of seepage water. The testing station 1 is equipped with a pressurization unit, which is used to simultaneously supply water and pressurize multiple testing chambers 101, or to independently supply water and pressurize a single testing chamber 101, to meet the different needs of batch testing and precise testing of a single sample. The side wall of the testing platform 1 is equipped with an indicator light 506, and the testing platform 1 is also equipped with a sensing unit. The sensing unit is used to sense the leakage of the waterproof membrane overlap joint in real time during the testing process. The sensing unit and the indicator light 506 are electrically connected. During the testing operation, if the waterproof membrane overlap joint is sealed and there is no leakage, the indicator light 506 remains lit. If water seepage or leakage occurs at the waterproof membrane overlap joint, the indicator light 506 switches to the off state. This allows for a direct assessment of the waterproof performance of the overlap joint. The indicator light 506 uses a high-brightness LED light, which facilitates quick observation and judgment by the testing personnel.

[0021] The overlapping portion of the waterproof membrane to be tested is cut to a size matching the testing chamber 101, and placed at the opening of each testing chamber 101, ensuring the overlapping seam is aligned with the hollowed-out area of ​​the perforation pressure plate 103. The perforation pressure plate 103 is then placed into the corresponding positioning groove 102, pressed against the surface of the waterproof membrane, and the clamping plate 104 is installed on the positioning groove 102 and fixed, completing the positioning and clamping of the waterproof membrane. In this process, the setting of multiple testing chambers 101 allows for simultaneous testing of multiple waterproof membrane overlapping seams, improving testing efficiency and solving the problem of traditional devices only being able to test one group at a time, resulting in low testing efficiency. According to the testing requirements, the pressurization unit can be selected to select either synchronous water supply pressurization or single independent water supply pressurization mode. After the pressurization unit is activated, water is injected into the testing chamber 101 and gradually pressurized to simulate the water pressure environment in actual use of waterproof membrane, ensuring the accuracy of the test results. Compared with the shortcomings of traditional testing devices that have a single pressurization mode and cannot adapt to different testing scenarios, the pressurization mode of this device can be flexibly switched, which is suitable for both batch sampling and precise testing of single samples, thus improving the versatility of the device. During the testing process, the sensing unit detects the leakage at the overlap joints of the waterproof membrane in real time. If the overlap joint is well sealed and there is no leakage, the sensing unit remains in the conductive state, and the indicator light 506 remains lit. The tester can quickly determine that the waterproof performance of the overlap joint of the waterproof membrane is qualified. If there is a sealing defect at the overlap joint and water seepage occurs, the sensing unit immediately disconnects, and the indicator light 506 turns off, providing a direct feedback on the unqualified situation. This visual judgment method eliminates the need for testers to observe at close range or disassemble the device, reducing the workload of testers. At the same time, it avoids errors caused by human observation, improves the accuracy of the test, and solves the problems of traditional test methods being unintuitive and prone to errors. The pressurization unit is shut down, the water in the test chamber 101 is drained, the clamping plate 104 and the leak pressure plate 103 are removed, the tested waterproof membrane is taken out, and the test operation is completed. Multiple test chambers 101 are set up independently, and qualified and unqualified samples can be taken out separately without interference, further improving the smoothness of the test process.

[0022] Figure 2 , Figure 3 , Figure 4 , Figure 6As shown, the sensing unit includes a detection cylinder 5, a first conductive ring 502, and a second conductive ring 503. A piston disc 501 is slidably connected inside the detection cylinder 5. The first conductive ring 502 is fixedly connected to the piston disc 501. The second conductive ring 503 is disposed on the inner wall of the detection cylinder 5 and located above the first conductive ring 502. A spring 504 is provided inside the detection cylinder 5. One end of the spring 504 is fixedly connected to the piston disc 501, and the other end is fixedly connected to the inner wall of the detection cylinder 5. The detection cylinder 5 is connected to the detection chamber 101 through an interconnecting pipe 505. The detection cylinder 5 is fixedly connected to the inner wall of the detection stage 1. The first conductive ring 502 and the second conductive ring 503 are connected in series with the indicator light 506 and the power supply through wires to form a closed loop, controlling the opening and closing of the indicator light 506.

[0023] In the initial state, the spring 504 is in a natural extension and retraction state, the supporting piston disc 501 is located at the lower part of the detection cylinder 5, and the conductive ring 1 502 and conductive ring 2 503 are in a separated state. At this time, the closed circuit is broken, and the indicator light 506 is in an off state, which makes it easy for the testing personnel to confirm that the initial state of the device is normal and avoids misjudgment due to abnormal initial state. When the pressurization unit supplies water to the detection chamber 101, the water pressure in the detection chamber 101 gradually increases. The water enters the top of the detection cylinder 5 through the interconnection pipe 505, generating a downward thrust on the piston disc 501. As the water pressure continues to rise, the thrust gradually exceeds the elastic force of the spring 504, pushing the piston disc 501 to slide downward until the conductive ring 1 502 and the conductive ring 2 503 come into contact and conduct. At this time, the closed circuit is connected, and the indicator light 506 lights up, indicating that the water pressure in the detection chamber 101 has reached the detection requirements and there is no leakage at the overlap of the waterproof membrane (if there is leakage, the water pressure cannot be maintained, and the piston disc 501 cannot be pushed to the contact of the conductive ring). This sensing unit has a simple structure, does not require complex electronic components, has a low failure rate, and is more suitable for long-term use in humid detection environments compared to traditional electronic sensing devices, thus improving the durability of the device. If leakage occurs at the overlap of the waterproof membrane, the water pressure in the detection chamber 101 will drop rapidly, the thrust at the top of the detection cylinder 5 will decrease accordingly, the spring 504 will reset under the action of elasticity, pushing the piston disc 501 to slide upward, the conductive ring 1 502 and the conductive ring 2 503 will separate, the closed circuit will be broken, and the indicator light 506 will immediately turn off, quickly providing feedback on the leakage situation. This mechanical sensing method based on water pressure changes has a fast response speed and can capture the moment of leakage in real time, avoiding detection errors caused by sensing delay, further improving the accuracy of detection. At the same time, the mechanical structure does not require an external power supply, is energy-saving and highly stable, and reduces the cost of use. After the test is completed, the water in the test chamber 101 is drained, the water pressure at the bottom of the test cylinder 5 disappears, the spring 504 resets, the piston disc 501 returns to its initial position, the conductive ring separates, the indicator light 506 goes out, and the device returns to its initial state, making it convenient for the next test. The operation is convenient and requires no additional reset operation.

[0024] Figure 4 , Figure 5 As shown, an observation groove 402 is provided on the upper surface of the pressure plate 104, and a seepage hole 401 is provided inside the pressure plate 104. One end of the seepage hole 401 is connected to the seepage groove 4, and the other end is connected to the observation groove 402. During the inspection operation, if leakage occurs at the overlap of the waterproof membrane, the water that enters the inspection chamber 101 after being pressurized will pass through the leakage pressure plate 103 and flow into the seepage groove 4, and then be guided into the observation groove 402 through the seepage hole 401, so as to facilitate the direct observation of the leakage phenomenon.

[0025] After the waterproof membrane is positioned and tightened, confirm that both ends of the seepage hole 401 are connected to the seepage groove 4 and the observation groove 402 respectively, and that there is no blockage. This ensures that the leaked water can be smoothly diverted, avoids misjudgment of observation due to blockage of the diversion channel, and improves the reliability of the detection. When leakage occurs at the overlap of the waterproof membrane, the water pressurized by the pressurization unit passes through the overlap of the waterproof membrane and flows into the seepage tank 4 through the hollow area of ​​the leak pressure plate 103. Subsequently, the water in the seepage tank 4 is guided through the seepage hole 401 and slowly flows into the observation tank 402. The inspectors can directly observe whether there is water accumulation in the observation tank 402 to confirm the leakage. Compared with the method of judging by only the indicator light 506, this structure adds a visual observation channel, which can directly see the specific situation of the leakage, avoid misjudgment caused by the failure of the indicator light 506, and facilitate the inspectors to record the degree of leakage, providing a basis for subsequent waterproof membrane quality analysis and improving the practicality of the inspection. After the test is completed, remove the clamping plate 104 and clean the residual water in the seepage tank 4, seepage hole 401 and observation tank 402 to prevent water residue from causing corrosion of components and extend the service life of the device.

[0026] Figure 4 , Figure 5 As shown, the observation tank 402 is cone-shaped with a large opening at the top and a small opening at the bottom, which facilitates water accumulation and magnifies the visual effect of leakage, making it easier for inspectors to observe. A floating ball 404 is placed inside the observation tank 402. The floating ball 404 is made of lightweight and corrosion-resistant materials such as plastic or rubber. A sealing cover 403 is installed on the pressure plate 104. The sealing cover 403 is made of transparent acrylic or glass, which can form a sealed shield and protection for the observation tank 402, preventing water splashing and dust from entering the observation tank 402 during the inspection process, while not affecting the observation effect.

[0027] When leakage occurs at the overlap of the waterproof membrane, water flows into the conical observation groove 402 through the seepage hole 401. Because the observation groove 402 is conical, the water quickly gathers at the bottom. As the water volume increases, the buoyancy gradually increases, pushing the floating ball 404 upward. The inspector can clearly observe the floating state of the floating ball 404 through the transparent sealing cover 403. Even a small amount of leakage can be detected in time by the slight movement of the floating ball 404. Compared with directly observing the water accumulation, the sensitivity is higher, and it can capture slight leakage, further improving the accuracy of detection and solving the problem that traditional observation methods are difficult to detect slight leakage. At the same time, the conical observation groove 402 can concentrate the water, avoiding the inconspicuous observation caused by the dispersion of water, and improving the convenience of observation.

[0028] Figure 3 , Figure 5 , Figure 7 As shown, a sealing gasket 6 is provided on the lower end face of the pressure plate 104. The sealing gasket 6 is made of elastic and corrosion-resistant rubber material. The sealing gasket 6 fits against the upper end face of the pressure plate 103. A groove is provided on the lower end face of the pressure plate 104. An expansion airbag 601 is provided inside the groove. The expansion airbag 601 is made of flexible sealing material. It can generate a squeezing force by inflating. The expansion airbag 601 is connected to an external air supply device, which can realize inflation and deflation. After inflation, it can squeeze the sealing gasket 6, causing the sealing gasket 6 to deform and fit tightly against the upper end face of the pressure plate 103.

[0029] After the clamping plate 104 is installed on the positioning groove 102 and initially fixed, the sealing gasket 6 naturally adheres to the upper end face of the leakage pressure plate 103. At this time, the sealing gasket 6 is in a natural state, achieving initial sealing. Subsequently, the air supply device inflates the expansion airbag 601. The expansion airbag 601 gradually expands, generating a uniform squeezing force on the sealing gasket 6, causing the sealing gasket 6 to undergo elastic deformation and tightly adhere to the upper end face of the leakage pressure plate 103, completing the sealing reinforcement. This double sealing structure has a better sealing effect than the traditional single sealing gasket 6 seal. It can effectively prevent the pressurized water in the detection chamber 101 from leaking from the contact surface between the clamping plate 104 and the leakage pressure plate 103, avoiding detection misjudgment caused by poor sealing of the contact surface, improving the accuracy of the detection results, and solving the technical defect of easy leakage at the contact surface of traditional devices. During the testing process, the inflatable airbag 601 remains inflated, continuously applying a compressive force to the sealing gasket 6 to ensure that the sealing gasket 6 and the leakage pressure plate 103 are always tightly fitted. Even if the water pressure inside the testing chamber 101 increases, it can effectively prevent water leakage and ensure the sealing of the testing environment. At the same time, the elastic material of the sealing gasket 6 can adapt to the slight unevenness of the upper surface of the leakage pressure plate 103, further enhancing the sealing performance and avoiding sealing failure caused by uneven contact surfaces. After the test is completed, the gas in the expansion bladder 601 is first discharged. The expansion bladder 601 contracts and resets, and the sealing gasket 6 loses the squeezing force and returns to its natural state. At this time, the pressure plate 104 can be easily removed, avoiding the difficulty of disassembly caused by the sealing gasket 6 and the leak pressure plate 103 being too tightly attached, thus improving the ease of operation. The sealing gasket 6 can be reused, and the expansion bladder 601 can be flexibly inflated and deflated, reducing the maintenance cost of the device and extending the service life of the sealing components.

[0030] Figure 5 , Figure 7 As shown, multiple sealing grooves 603 are equidistantly formed on the upper surface of the pressure plate 103. The sealing grooves 603 are set in a V-shaped structure. The sealing gasket 6 deforms under the pressure and can be embedded into the sealing groove 603 to further enhance the sealing performance of the contact surface.

[0031] When the expansion bladder 601 inflates and compresses the sealing gasket 6 to undergo elastic deformation, the lower end face of the sealing gasket 6 will be embedded into the V-shaped sealing groove 603 on the upper end face of the leakage pressure plate 103. The structure of the V-shaped sealing groove 603 can limit the sealing gasket 6, preventing the sealing gasket 6 from shifting during the detection process. At the same time, it increases the contact area between the sealing gasket 6 and the leakage pressure plate 103, forming multiple sealing barriers. Compared with planar sealing, the sealing performance of this interlocking sealing structure is greatly improved, which can effectively prevent high-pressure water from leaking from the contact surface and further reduce the probability of false detection. During the testing process, the V-shaped sealing groove 603 can accommodate the deformed part of the sealing gasket 6, making the sealing gasket 6 fit more tightly with the leakage pressure plate 103. Even if the water pressure in the testing chamber 101 fluctuates, it can maintain a good sealing effect and avoid sealing failure caused by water pressure fluctuation. At the same time, the V-shaped structure facilitates the insertion and removal of the sealing gasket 6, and will not damage the sealing gasket 6 due to excessive tightness, thus extending the service life of the sealing gasket 6. After the inflatable airbag 601 is deflated, the sealing gasket 6 returns to its natural state and detaches from the V-shaped sealing groove 603. There will be no jamming when disassembling the clamping plate 104, making the operation convenient. The V-shaped structure of the sealing groove 603 does not easily accumulate water and dust, and cleaning only requires simple wiping, reducing the maintenance difficulty of the device and preventing the accumulation of substances from affecting the sealing effect next time.

[0032] Figure 3 , Figure 6 , Figure 7 As shown, the inside of the detection cylinder 5 is provided with an air supply chamber located below the piston disc 501. The detection cylinder 5 is provided with a pipe 602 that is connected to the air supply chamber. The end of the pipe 602 away from the air supply chamber is connected to the expansion air bag 601. The air supply chamber stores compressed gas, which can stably supply gas to the expansion air bag 601.

[0033] Before testing, the air supply chamber is pre-stored with a sufficient amount of compressed gas. When the pressurization unit supplies water to the testing chamber 101 to increase the pressure, the water pressure in the testing chamber 101 is transmitted to the piston chamber of the testing cylinder 5 through the interconnection pipe 505, pushing the piston disc 501 to slide downward. At this time, the piston disc 501 squeezes the air supply chamber downward, causing the compressed gas inside the air supply chamber to be squeezed and the pressure to rise. Then, it is transported to the expansion bladder 601 through the pipe 602 to realize the automatic inflation of the expansion bladder 601. This integrated design eliminates the need for an additional independent air supply device, simplifies the overall structure of the device, reduces the number of parts, and lowers the manufacturing cost of the device. At the same time, it avoids the problem of tangled pipelines of external air supply devices, improving the neatness and ease of operation of the device. The expansion bladder 601 inflates under the action of compressed gas, compressing the sealing gasket 6 to achieve a tight seal. This process is synchronized with the detection process, requiring no additional operation, saving detection time and improving detection efficiency. At the same time, the air supply volume of the air supply chamber changes synchronously with the water pressure of the detection chamber 101. The higher the water pressure, the greater the squeezing force of the piston disc 501 on the air supply chamber, the greater the inflation pressure of the expansion bladder 601, and the tighter the seal gasket 6 fits. This achieves adaptive matching between sealing performance and detection water pressure, further improving sealing reliability and avoiding leakage at the contact surface due to increased water pressure. After the test is completed, the water in the test chamber 101 is drained, the water pressure in the piston chamber of the test cylinder 5 disappears, the spring 504 resets, and pushes the piston disc 501 to slide upward. The pressure inside the air supply chamber decreases. At this time, the gas in the expansion bladder 601 slowly flows back to the air supply chamber through the pipe 602. The expansion bladder 601 contracts and resets, completing the automatic deflation. This automatic inflation and deflation design eliminates the need for manual operation by the testing personnel, further reducing workload. At the same time, the air supply chamber can repeatedly store compressed gas, enabling recycling and reducing operating costs.

[0034] It should be noted that pipe 602 is a stretchable and retractable hose, so it will not interfere with the installation and removal of clamping plate 104.

[0035] Figure 2 , Figure 4 As shown, the pressurization unit includes a water pump 3, which is installed inside the testing platform 1. Each testing chamber 101 has a water supply pipe 301 connected to its bottom. A solenoid valve is installed on the water supply pipe 301. The end of each water supply pipe 301 away from the testing chamber 101 is connected to the outlet of the water pump 3. The inlet of the water pump 3 is used to connect to an external water source (such as tap water or a water storage tank). The testing platform 1 has a drain pipe 302 connected to each testing chamber 101. The end of the drain pipe 302 away from the testing chamber 101 extends to the outside of the testing platform 1, and a valve switch for controlling opening and closing is installed on the drain pipe 302.

[0036] Depending on the testing requirements, either synchronous water supply pressurization or individual independent water supply pressurization mode can be selected. If batch testing is required, open the solenoid valves on all water supply pipes 301 and start the water pump 3. After pressurizing the external water source, the water pump 3 injects the water into the corresponding testing chamber 101 through each water supply pipe 301, achieving synchronous pressurization of multiple testing chambers 101 and improving testing efficiency. If precise testing is required for a single sample, only open the solenoid valve of the water supply pipe 301 of the corresponding testing chamber 101, and close the other solenoid valves. The water pump 3 only supplies water to that testing chamber 101 for pressurization. This allows for re-inspection of unqualified samples or detailed testing of a single sample, improving the flexibility and practicality of the device. At the same time, the water pump 3 can adjust the pressurization pressure to adapt to the testing requirements of waterproof membranes of different specifications and waterproof grades, expanding the applicability of the device. During the testing process, the water pump 3 maintains a stable water pressure in the testing chamber 101 to ensure the accuracy of the test results. After the test is completed, the water pump 3 and the solenoid valves of each water supply pipe 301 are closed, and the valve switches on each drain pipe 302 are opened. The water in the testing chamber 101 is discharged to the outside of the testing platform 1 through the drain pipe 302. The drainage is smooth and there are no dead corners where water accumulates. After the drainage is completed, the valve switches are closed, and the next round of testing can be carried out.

[0037] Figure 1 , Figure 5 , Figure 7 As shown, a fixing bolt 2 is fixedly connected to the testing table 1, and a mounting hole adapted to the fixing bolt 2 is opened on the clamping plate 104. A locking nut 201 is threadedly connected to one end of the fixing bolt 2 through the mounting hole.

[0038] After placing the waterproof membrane and the leak pressure plate 103 in place, align the mounting hole of the clamping plate 104 with the fixing bolt 2 on the test table 1, so that the fixing bolt 2 passes through the mounting hole. Then, screw the locking nut 201 into the end of the fixing bolt 2 and tighten it gradually until the clamping plate 104 is tightly attached to the leak pressure plate 103, thus completing the clamping and fixing of the waterproof membrane. This bolt connection method has a stable structure and uniform clamping force, which can ensure that the waterproof membrane will not shift during the test, avoid the overlap seam from deviating from the test position due to displacement, and improve the accuracy of the test. During the testing process, the fixing bolt 2 and the locking nut 201 remain locked, providing a stable clamping force to the clamping plate 104. Together with the sealing structure, this ensures the sealing of the testing chamber 101, preventing water leakage due to insufficient clamping and further improving the accuracy of the test results. After the test is completed, loosen the locking nut 201 and remove it from the fixing bolt 2. Then, lift the pressure plate 104 upwards to complete the disassembly. The operation is convenient and makes it easy to remove the tested waterproof membrane. At the same time, the detachable bolt connection facilitates the replacement and maintenance of the pressure plate 104 and the leak pressure plate 103. When the sealing gasket 6 is worn or the pressure plate 104 is damaged, it can be quickly disassembled and replaced, reducing the maintenance cost of the device.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention.

Claims

1. A device for accurately detecting the impermeability of waterproof membrane overlap joints, comprising a testing platform (1), wherein a testing cavity (101) is provided on the testing platform (1), the upper end of the testing cavity (101) is open, a positioning groove (102) is provided on the testing platform (1) at a position corresponding to the upper part of the testing cavity (101), a perforation pressure plate (103) is placed inside the positioning groove (102), and a clamping plate (104) is detachably connected to the positioning groove (102), characterized in that: The detection chamber (101) is provided in multiple sets at equal intervals along the length of the detection table (1). The positioning groove (102), the hole pressure plate (103) and the pressing plate (104) are respectively provided in corresponding cooperation with each set of detection chambers (101). The end face of the pressing plate (104) above the hole pressure plate (103) is provided with a water seepage groove (4). The testing station (1) is equipped with a pressurization unit, which is used to simultaneously supply water to multiple testing chambers (101) for pressurization, or to independently supply water to a single testing chamber (101) for pressurization. The side wall of the testing platform (1) is equipped with an indicator light (506), and the testing platform (1) is also equipped with a sensing unit. The sensing unit is used to sense the leakage of the waterproof membrane overlap joint in real time during the testing process. The sensing unit is electrically connected with the indicator light (506). During the testing operation, if the waterproof membrane overlap joint is sealed and there is no leakage, the indicator light (506) will remain lit. If the waterproof membrane overlap joint shows water seepage and leakage, the indicator light (506) will switch to the off state, so as to intuitively determine the waterproof performance of the overlap joint.

2. The precise detection device for waterproof membrane overlap joint impermeability according to claim 1, characterized in that, The sensing unit includes a detection cylinder (5), a first conductive ring (502), and a second conductive ring (503). A piston disc (501) is slidably connected inside the detection cylinder (5). The first conductive ring (502) is fixedly connected to the piston disc (501). The second conductive ring (503) is disposed on the inner wall of the detection cylinder (5) and located above the first conductive ring (502). A spring (504) is provided inside the detection cylinder (5). One end of the spring (504) is fixedly connected to the piston disc (501), and the other end is fixedly connected to the inner wall of the detection cylinder (5). The detection cylinder (5) is connected to the detection chamber (101) through an interconnecting pipe (505). The detection cylinder (5) is fixedly connected to the inner wall of the detection platform (1). The first conductive ring (502) and the second conductive ring (503) are used to control the switch of the indicator light (506).

3. The precise detection device for waterproof membrane overlap joint impermeability according to claim 1, characterized in that, The upper surface of the pressing plate (104) is provided with an observation groove (402), and a seepage hole (401) is provided inside the pressing plate (104). One end of the seepage hole (401) is connected to the seepage groove (4), and the other end is connected to the observation groove (402). When the inspection is carried out, if the waterproof membrane overlap joint leaks, the water that enters the inspection chamber (101) after being pressurized will pass through the leak pressure plate (103) and flow into the seepage groove (4), and then flow into the observation groove (402) through the seepage hole (401), so as to make it easy to observe the leakage phenomenon directly.

4. The precise detection device for impermeability of waterproof membrane overlap joints according to claim 3, characterized in that, The observation slot (402) is cone-shaped, and a floating ball (404) is placed inside the observation slot (402). A sealing cover (403) is installed on the clamping plate (104). The sealing cover (403) is made of transparent material and can form a sealed shield and protection for the observation slot (402).

5. The precise detection device for impermeability of waterproof membrane overlap joints according to claim 2, characterized in that, The lower end face of the pressing plate (104) is provided with a sealing gasket (6), which is in contact with the upper end face of the hole pressure plate (103). The lower end face of the pressing plate (104) is provided with a groove, and an expansion airbag (601) is provided inside the groove. After the expansion airbag (601) is inflated, it can squeeze the sealing gasket (6), so that the sealing gasket (6) is tightly attached to the upper end face of the hole pressure plate (103).

6. The precise detection device for waterproof membrane overlap joint impermeability according to claim 5, characterized in that, The upper surface of the pressure plate (103) has multiple sealing grooves (603) at equal intervals. The sealing grooves (603) are set in a V-shaped structure. The sealing gasket (6) is deformed under the pressure and can be embedded into the sealing groove (603) to further enhance the sealing performance of the contact surface.

7. The precise detection device for waterproof membrane overlap joint impermeability according to claim 5, characterized in that, The detection cylinder (5) has an air supply chamber located below the piston disc (501). The detection cylinder (5) is provided with a pipe (602) connected to the air supply chamber. The end of the pipe (602) away from the air supply chamber is connected to the expansion airbag (601). The air supply chamber stores compressed gas, which can stably supply gas to the expansion airbag (601).

8. The device for accurately detecting the impermeability of waterproof membrane overlap joints according to claim 1, characterized in that, The pressurization unit includes a water pump (3), which is installed inside the testing platform (1). Each set of testing chambers (101) has a water supply pipe (301) connected to its bottom. The water supply pipe (301) is equipped with a solenoid valve. The end of each water supply pipe (301) away from the testing chamber (101) is connected to the outlet of the water pump (3). The inlet of the water pump (3) is used to connect to an external water source. The testing platform (1) has a drain pipe (302) connected to each testing chamber (101). The end of the drain pipe (302) away from the testing chamber (101) extends to the outside of the testing platform (1). A valve switch for controlling opening and closing is installed on the drain pipe (302).

9. The precise detection device for waterproof membrane overlap joint impermeability according to claim 1, characterized in that, The testing platform (1) is fixedly connected with a fixing bolt (2), and the clamping plate (104) is provided with an installation hole that matches the fixing bolt (2). The fixing bolt (2) is threaded with a lock nut (201) at one end through the installation hole.

10. A testing method for a precise testing device for the impermeability of waterproof membrane overlap joints, comprising the precise testing device for the impermeability of waterproof membrane overlap joints as described in claim 1, characterized in that... The following steps are included: Step 1: Cut the overlapping part of the waterproof membrane to be tested to match the size of the test chamber (101), and place it at the opening of each test chamber (101) so that the overlapping seam is aligned with the hollow area of ​​the leak pressure plate (103); Step 2: Place the perforation pressure plate (103) into the positioning groove (102), press it to fit the surface of the roll material, install the clamping plate (104) and fix it to complete the positioning and clamping; Step 3: Select the synchronous or independent water supply pressurization mode through the pressurization unit, start the pressurization unit to inject water into the detection chamber (101) to pressurize it, and simulate the actual water pressure environment; Step 4: During the test, the sensor unit and the indicator light (506) work together to determine whether the joint is sealed properly and there is no leakage. If the indicator light (506) is on continuously, the joint is sealed properly and there is no leakage. If the indicator light (506) is off, there is leakage and the waterproofing is not up to standard. Step 5: Turn off the pressurization unit, drain the water from the test chamber (101), remove the clamping plate (104) and the leak pressure plate (103), take out the tested waterproof membrane, and complete the test.

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