A multi-directional tensile testing device for waterproofing membranes

Abstract

The application discloses a waterproof roll multi-directional stretching detection device, which is applied to the field of roll detection devices and comprises a base, a bearing table, a rotating ring and at least two clamping tables. The base is internally provided with a servo motor for driving the rotating ring. The rotating ring is provided with the at least two clamping tables which can be quickly disassembled and assembled through electric push rods. The clamping tables are provided with clamping mechanisms and positioning grooves, and can be precisely locked by cooperating with positioning cylinders on a tray. The bearing table can be adapted to transparent bearing plates or hollow cylinders, and can support two modes of conventional stretching and fluid pressure coupling detection. The device can realize multi-directional stretching synchronously or asynchronously through the rotatable and detachable multi-clamping table structure, can accurately simulate multi-directional force detection of waterproof rolls, and can make detection data closer to engineering actual service scenes, so as to provide more reliable basis for quality control, adapt to detection requirements of waterproof rolls of different specifications, have the advantages of convenient operation and high detection precision, and provide reliable technical support for performance evaluation of waterproof rolls.

Description

Technical Field

[0001] This invention relates to the field of roll material testing devices, and particularly to a multi-directional tensile testing device for waterproof roll materials. Background Technology

[0002] As a core material in building waterproofing projects, the performance of waterproof membranes directly affects the waterproofing effect and long-term durability of buildings. Among various waterproofing materials, membranes have become the mainstream choice due to their convenient construction and wide coverage, and are widely used in critical areas such as roofs and basements. Tensile properties are key indicators for evaluating their mechanical properties and judging their suitability for engineering projects. These include parameters such as tensile strength and elongation at break. These data reflect the material's deformation and resistance to stress, directly affecting its adaptability and reliability in engineering projects.

[0003] Chinese invention patent CN118758769B discloses a device and method for testing the tensile strength of waterproof membranes, which can ensure that the unfolding direction of the waterproof membrane is consistent with the traction direction, guaranteeing that the waterproof membrane is subjected to uniform force during the testing process and improving the accuracy of tensile performance testing.

[0004] Chinese invention patent CN104122184B discloses a test device and test method for testing the impermeability of waterproof membranes under tensile conditions. The test device has a simple structure, is easy to install, and has low manufacturing cost. At the same time, the test method for testing the impermeability of waterproof membranes under tensile conditions is simple and easy to operate.

[0005] Current traditional waterproof membrane performance testing devices have several significant shortcomings. First, they suffer from poor loading synchronization; these traditional devices struggle to achieve multi-directional synchronous or asynchronous tension, failing to accurately simulate the stress state of waterproof membranes in actual engineering projects. Second, the adaptability of the clamps is insufficient; existing clamps are mostly fixed structures, unable to flexibly adjust the number and angle of clamps according to the membrane size and testing requirements, resulting in poor adaptability and difficulty in meeting the diverse testing needs of different types of waterproof membranes. Third, the testing modes are limited; most devices can only perform routine tensile tests, making it difficult to comprehensively evaluate the actual performance of waterproof membranes. Finally, there is also a lack of operational flexibility. Summary of the Invention

[0006] The core of this invention lies in solving the problems of insufficient adaptability of existing waterproof membrane tensile testing devices and the single testing mode by using a rotatable and detachable multi-clamping platform structure. Simultaneously, the number and angle of clamps can be flexibly adjusted according to the membrane size and testing requirements.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A multi-directional tensile testing device for waterproof membrane includes a base, a support platform fixedly connected to the upper end of the base, a tray connected to the outer end of the base, and a rotating ring rotatably connected between the base and the support platform. The rotating ring includes a main ring body with multiple evenly distributed protrusions on the main ring body, each protrusion being connected to an electric push rod. A servo motor for driving the rotating ring to rotate is installed inside the base. Multiple circumferentially distributed slots are opened on the outer side of the top of the support platform, and positioning blocks are set in the slots. The rotating ring is detachably mounted with at least two clamping platforms via an electric push rod. Each clamping platform includes a base, and the base is provided with a clamping mechanism consisting of an upper clamping plate and a lower clamping plate. The upper clamping plate has a locking groove that matches the positioning block at one end near the bearing platform. Multiple positioning cylinders are connected between the tray and the base in a circular pattern. The bottom of the base is provided with a positioning groove that matches the power output end of the positioning cylinder. When the electric push rod pushes the clamping table to the set position, the positioning groove matches the position of the positioning cylinder.

[0009] Furthermore, a sealing groove is provided at the opening of the support platform, and a transparent support plate or hollow cylinder can be detachably installed in the sealing groove. The outer end of the hollow cylinder is connected to a sealing ring that can be clamped by a clamping mechanism, and a fluid input pipe and a fluid output pipe are installed on the hollow cylinder.

[0010] Furthermore, the upper surface of the upper clamping plate and the upper surface of the bearing platform are located on the same plane.

[0011] Furthermore, one end of the base is connected to a clamping cylinder for driving the upper clamping plate to move vertically, and an electrically controlled pin for locking the telescopic end of the electric push rod is installed inside the base. The top of the telescopic end of the electric push rod is provided with a locking hole that matches the telescopic end of the electrically controlled pin.

[0012] Furthermore, a through hole is provided in the middle of the support platform, and a groove matching the through hole is provided on the base, with at least one guide pipe connected to the bottom of the groove.

[0013] Furthermore, sensors for detecting the tension of the roll material on the support platform are installed in both the through holes and the grooves.

[0014] Furthermore, the power output end of the electric actuator is connected to a quick-connect plug, and the base is equipped with a socket that matches the quick-connect plug. When the telescopic end of the electric control pin is inserted into the locking hole, the quick-connect plug mates with the socket.

[0015] Furthermore, it also includes an auxiliary testing system, which comprises a data acquisition module, a data processing module, a control module, and a data storage module. The data acquisition module is used to acquire testing data for different testing conditions. The data processing module is used to receive and analyze the testing data transmitted by the data acquisition module and analyze the tensile properties of the waterproof membrane. The control module is used to connect with the execution component and control the execution component to perform preset testing actions according to preset testing parameters. The data storage module is used to classify and store the full data of different testing items.

[0016] Compared with the prior art, the advantages of this invention are: (1) This solution uses a rotatable and detachable multi-clamping platform structure to achieve multi-directional stretching synchronously or asynchronously, accurately simulating the multi-directional tensile test of waterproof membrane. The test data is closer to the actual service scenario of the project, providing a more reliable basis for quality control.

[0017] (2) This solution can flexibly adjust the number and angle of clamps according to the size of the roll material and the testing requirements; it is compatible with both transparent bearing plate tensile testing and hollow cylinder fluid pressure coupling testing modes, and can achieve seamless switching from conventional tensile testing to composite performance testing under complex environments, adapting to the diverse testing requirements of different types of waterproof roll materials. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention; Figure 2 This is a cross-sectional view of the present invention when adjusting the relative positions of the two clamping platforms; Figure 3 This is a cross-sectional schematic diagram of the clamping platform of the present invention being fixed by a positioning cylinder; Figure 4 for Figure 3 Schematic diagram of the structure at point A; Figure 5 This is a top view schematic diagram of the waterproof membrane being stretched in multiple directions according to the first embodiment of the present invention; Figure 6 This is a cross-sectional schematic diagram of the clamping platform and the rotating ring of the present invention when they are connected; Figure 7 for Figure 6 Schematic diagram of the structure at point B; Figure 8 This is a cross-sectional view of the hollow cylinder being installed in the second embodiment of the present invention.

[0019] Explanation of the labels in the diagram: 1. Base; 101. Servo motor; 102. Positioning cylinder; 11. Tray; 2. Support platform; 21. Slot; 22. Positioning block; 3. Rotating ring; 301. Electric push rod; 3011. Quick connector; 31. Main ring body; 32. Boss; 5. Clamping platform; 51. Base; 511. Electrically controlled pin; 52. Upper clamping plate; 53. Lower clamping plate; 54. Clamping cylinder. Detailed Implementation

[0020] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0021] First implementation method: Please see Figures 1-7 A multi-directional tensile testing device for waterproof membrane includes a base 1, a support platform 2 fixedly connected to the upper end of the base 1, a sealing groove provided at the opening of the support platform 2, a tray 11 connected to the outer end of the base 1, and a rotating ring 3 rotatably connected between the base 1 and the support platform 2. The rotating ring 3 includes a main ring body 31, and multiple evenly distributed protrusions 32 are provided on the main ring body 31. Each protrusion 32 is connected to an electric push rod 301. A servo motor 101 for driving the rotating ring 3 to rotate is installed inside the base 1. A toothed ring is provided at one end of the main ring body 31 inserted into the base 1. The power output end of the servo motor 101 is connected to a drive gear that meshes with the toothed ring. By controlling the operation of the servo motor 101, the rotating ring 3 can be rotated by a set angle. A rotary connector matching the rotating ring 3 is also provided inside the base 1. The electric push rod 301 is connected to an external power source through the rotary connector to ensure the power supply of the electric push rod 301. The rotary connector is configured by those skilled in the art using existing technology, such as a through-hole conductive slip ring HG90190. The stator end of the rotary connector is fixed to the bottom of the inner cavity of the base 1 by bolt flanges and remains stationary with the base 1. The rotor rotates synchronously with the rotating ring 3. The stator end leads out cables to the power module and control board inside the base 1, and the rotor end leads out cables through the internal wiring groove of the rotating ring 3 to the electric push rod 301 quick-connect socket at each boss 32.

[0022] The top outer side of the support platform 2 is provided with multiple circumferentially distributed slots 21, and positioning blocks 22 are provided in the slots 21; the rotating ring 3 is detachably mounted with at least two clamping platforms 5 via an electric push rod 301.

[0023] The clamping table 5 includes a base 51, on which a clamping mechanism consisting of an upper clamping plate 52 and a lower clamping plate 53 is provided. The upper clamping plate 52 has a locking groove that matches the positioning block 22 at one end near the bearing table 2. One end of the base 51 is connected to a clamping cylinder 54 for driving the upper clamping plate 52 to move vertically. An electric control pin 511 for locking the telescopic end of the electric push rod 301 is installed inside the base 51. The top of the telescopic end of the electric push rod 301 is provided with a locking hole that matches the telescopic end of the electric control pin 511.

[0024] The power output end of the electric push rod 301 is also connected to a quick-connect plug 3011. The base 51 is provided with a socket that matches the quick-connect plug 3011. When the telescopic end of the electric control pin 511 is inserted into the locking hole, the quick-connect plug 3011 connects with the socket.

[0025] A plurality of positioning cylinders 102 arranged in a circle are connected between the tray 11 and the base 1. The bottom end of the base 51 is provided with a positioning groove that matches the power output end of the positioning cylinder 102. When the electric push rod 301 pushes the clamping table 5 to the set position, the positioning groove matches the position of the positioning cylinder 102.

[0026] In this embodiment, a transparent support plate is detachably installed in the sealing groove. The upper surface of the upper clamping plate 52 and the upper surface of the support platform 2 are located on the same plane. The cut waterproof membrane is placed on the transparent support plate, and the waterproof membrane is clamped in multiple directions by multiple clamping platforms 5. Then, by controlling the electric push rod 301 to work, the clamping platform 5 is moved away from the support platform 2 to perform tensile testing on the waterproof membrane.

[0027] The working process of this embodiment is as follows: Based on the size of the waterproof membrane to be tested and the preset stretching direction, determine the number and installation position of the clamping platform 5. Align the base 51 of the clamping platform 5 with the telescopic end of the electric push rod 301 on the corresponding protrusion 32 of the rotating ring 3 and push it in. When the telescopic end of the electric push rod 301 moves into place, the electric control pin 511 in the base 51 is activated, and the telescopic end extends and inserts into the locking hole at the top of the telescopic end of the electric push rod 301, thus completing the locking of the clamping platform 5 and the electric push rod 301. When the locking is completed, the quick-connect plug 3011 of the power output end of the electric push rod 301 is connected to the socket on the base 51, thus completing the connection of the power supply and signal path and realizing the quick installation of the clamping platform 5. After installation, lay the cut waterproof membrane to be tested flat on the transparent support plate, so that each edge of the waterproof membrane to be clamped extends between the upper clamping plate 52 and the lower clamping plate 53 of the corresponding clamping platform 5.

[0028] Then, the clamping cylinders 54 of all clamping platforms 5 are activated. The clamping cylinders 54 drive the upper clamping plate 52 to descend vertically, and cooperate with the lower clamping plate 53 to clamp the edge of the waterproof membrane. At this time, the positioning block 22 is just inserted into the locking groove at the end of the upper clamping plate 52, completing the initial positioning and fixing of the waterproof membrane.

[0029] Next, according to the preset test parameters, each electric push rod 301 is controlled to extend outward at the set speed and stroke, driving each clamping platform 5 to move away from the center of the bearing platform 2, so as to realize multi-directional synchronous or asynchronous stretching of the waterproof membrane. During the stretching process, the tensile force and deformation data are collected in real time to complete the tensile performance test of the waterproof membrane.

[0030] When it is necessary to keep the installation position of each clamping platform 5 unchanged and only adjust the clamping point of the waterproof membrane, first control each electric push rod 301 to extend by a set distance so that the upper clamping plate 52 is completely separated from the slot 21; then control the servo motor 101 in the base 1 to start, drive the rotating ring 3 to rotate by a specified angle, so that the position of each clamping platform 5 relative to the waterproof membrane changes, thereby changing the clamping point of the waterproof membrane.

[0031] When it is necessary to adjust the position of the clamping platform 5 to change the multi-point stretching direction, first release the clamping state of the waterproof membrane, then control the electric push rod 301 to work and move the clamping platform 5 to the positioning position that matches the positioning groove. Then, the positioning cylinder 102 at the corresponding position is activated, and the power output end of the positioning cylinder 102 extends upward and inserts into the positioning groove at the bottom of the corresponding base 51, locking the clamping platform 5. This prevents the clamping platform 5, which is not connected to the rotating ring 3, from shifting when the rotating ring 3 rotates or other clamping platform 5 position adjustments cause the tray 11 to vibrate.

[0032] After the clamping platform 5 is locked, its corresponding electric push rod 301 is unlocked and reset. Then, the servo motor 101 in the base 1 is started, driving the rotating ring 3 to rotate at a specified angle so that the boss 32 at the specified position matches the clamping platform 5. Then, the electric push rod 301 on the boss 32 is extended and docked with the locked clamping platform 5. Finally, the positioning cylinder 102 retracts, so that the locking of the clamping platform 5 is unlocked.

[0033] After the test is completed, first control all electric push rods 301 to retract and reset, then control the positioning cylinder 102 to retract and exit the positioning groove, and then control the clamping cylinder 54 to drive the upper clamping plate 52 to lift and release the waterproof membrane. The tested sample can then be removed. If it is necessary to adjust the stretching direction or change the number of clamps, simply control the electric control pin 511 to retract and unlock. The clamping table 5 can then be quickly removed from the electric push rods 301. After readjusting the installation position and number, the next set of tests can be carried out.

[0034] This embodiment enables flexible operation of multi-directional tensile testing of waterproof membranes. The quick-assembly and disassembly clamping platform 5 allows for free adjustment of the clamping quantity and position according to testing requirements, supporting synchronous or asynchronous multi-directional tensile testing. Simultaneously, with the coordinated control of the servo motor 101 and the positioning cylinder 102, the clamping point and tensile direction can be easily changed to adapt to testing scenarios for different specifications of membranes. Furthermore, real-time acquisition of tensile force and deformation data ensures the accuracy and reliability of the test results. The overall structural design balances ease of operation and testing accuracy, effectively improving the efficiency and flexibility of tensile performance testing of waterproof membranes.

[0035] Second implementation method: The difference between this embodiment and the first embodiment is that: Please see Figures 1-4 and Figures 6-8 A hollow cylinder is detachably installed in the sealing groove at the opening of the bearing platform 2. A sealing ring that can be clamped by a clamping mechanism is connected to the outer end of the hollow cylinder. A fluid input pipe and a fluid output pipe are installed on the hollow cylinder. Both the fluid input pipe and the fluid output pipe are equipped with opening and closing valves. The sealing groove contains an annular sealing gasket made of fluororubber, with an applicable temperature range of -20℃ to +200℃. It is oil-resistant, acid and alkali-resistant, and suitable for water and gas media. The sealing gasket has a rectangular flat strip cross-section, with a width of 6-10mm and a height of 3-5mm. After being embedded in the sealing groove, its top surface is flush with or slightly convex (0.2-0.5mm) to both sides of the support platform. The design compression rate is 15%-25%, corresponding to a compression amount of 0.6-1.25mm. The sealing ring body at the outer end of the hollow cylinder is made of 304 stainless steel, with a 2-3mm thick EPDM rubber sealing layer vulcanized and bonded to the bottom surface. The sealing layer has a trapezoidal cross-section with the wider bottom facing down, and the bottom sealing lip is 4-6mm wide. During operation, the clamping cylinder 54 of the clamping table 5 outputs clamping force to compress the sealing layer to the designed compression amount. The above-mentioned sealing structure is set by those skilled in the art based on existing technology; the expected leakage rate of this seal is less than 1×10⁻⁶ within the fluid pressure range of 0-0.5MPa. -6 Pa·m³ / s.

[0036] A through hole is provided in the middle of the support platform 2, and a groove matching the through hole is provided on the base 1. At least one guide pipe is connected to the bottom end of the groove.

[0037] Sensors for detecting the tensile condition of the coil material on the support platform 2 are installed in both the through hole and the groove. The sensors include, but are not limited to, image sensors and pressure sensors. The image sensor is an industrial CMOS area array camera with a resolution of not less than 5 million pixels, such as MV-CS050-10GM / GC. The pressure sensor is a strain gauge force sensor with a range of 0-500N and an accuracy class of 0.5, such as LCX-A-500N-ID. The pressure sensor is embedded in the groove of the base 1 with the sensing surface facing upward and in close contact with the test area. The sensor's protection measures in fluid environments include: the image sensor window is double-sealed with tempered quartz glass and fluororubber O-rings; a stainless steel 316L isolation diaphragm with a thickness of 0.1~0.2mm is installed at the front end of the pressure sensor, and silicone oil is filled between the diaphragm and the sensor as the pressure transmission medium; all sensor electrical interfaces use IP68 waterproof aviation plugs, and the signal cable is led out through the waterproof conduit inside the base 1, with the conduit port encapsulated with epoxy resin.

[0038] In this embodiment, the waterproof membrane to be tested is cut into a circle and placed at the opening of the support platform 2. Then, a hollow cylinder is used to cover the opening of the support platform 2 and the cut waterproof membrane is used to seal the opening end of the hollow cylinder. At this time, the clamping platform 5 is controlled to work, so that the clamping platform 5 clamps and presses the sealing ring on the hollow cylinder to ensure that the hollow cylinder and the waterproof membrane to be tested are precisely fitted. Then, airflow or water can be injected through the guide pipe or the fluid input pipe at the top of the hollow cylinder, so that one side of the waterproof membrane is squeezed by the fluid, thereby realizing the detection of the deformation of the waterproof membrane under water pressure or gas pressure.

[0039] The working process of this embodiment is as follows: First, determine the number and position of clamping platforms 5 based on the size of the waterproof membrane to be tested. Align the base 51 of the clamping platform 5 with the telescopic end of the electric push rod 301 on the corresponding protrusion 32 of the rotating ring 3 and push it in. After the telescopic end of the electric push rod 301 moves into place, the electric control pin 511 in the base 51 is activated, and the telescopic end extends and inserts into the locking hole at the top of the telescopic end of the electric push rod 301, thus locking the clamping platform 5 with the electric push rod 301. After locking, the quick-connect plug 3011 at the power output end of the electric push rod 301 automatically connects with the socket on the base 51, completing the power supply and signal path connection, and realizing the quick installation of the clamping platform 5.

[0040] After installation, the servo motor 101 inside the base 1 starts, driving the rotating ring 3 to rotate between the base 1 and the support platform 2, rotating each installed clamping platform 5 to the position corresponding to the slot 21 on the support platform 2, so that the locking groove of the upper clamping plate 52 near the support platform 2 is aligned with the positioning block 22 in the slot 21; the waterproof membrane to be tested, cut into a circle, is laid flat above the sealing groove at the opening of the support platform 2, completely covering the opening of the support platform 2, and then the hollow cylinder is placed on top of the waterproof membrane, so that the sealing ring at the outer end of the hollow cylinder is aligned with the sealing groove, and the four sides of the sealing ring extend into the space between the upper clamping plate 52 and the lower clamping plate 53 of each clamping platform 5.

[0041] Then, all clamping cylinders 54 of the clamping tables 5 are activated. The clamping cylinders 54 drive the upper clamping plate 52 to descend vertically, and cooperate with the lower clamping plate 53 to clamp and fix the sealing ring. At this time, the positioning block 22 is just inserted into the locking groove at the end of the upper clamping plate 52, completing the clamping and sealing of the hollow cylinder and the waterproof membrane, ensuring the sealing of the cavity formed by the inner wall of the hollow cylinder and the waterproof membrane.

[0042] According to the preset testing plan, if deformation testing under hydrostatic pressure is required, a set amount of water is injected into the hollow cylinder cavity through the fluid input pipe on the hollow cylinder. After the air in the cavity is completely discharged from the fluid output pipe, the pressure value set for the waterproof membrane is maintained. If testing under air pressure is required, gas at a set pressure is injected and maintained. At this time, the waterproof membrane is subjected to the fluid pressure inside the hollow cylinder on one side and deforms towards the through hole in the middle of the support platform 2. The image sensors in the groove of the base 1 and the through hole collect the deformation contour data of the waterproof membrane in real time, and the pressure sensor collects the stress data of the waterproof membrane in real time, thus completing the deformation and permeability test of the waterproof membrane under constant pressure.

[0043] If a combined test of fluid pressure and multi-directional tensile strength is required, first install N+3 clamping platforms 5 according to the preset test parameters, then select N electric push rods 301 to extend outward at the set speed and stroke, so that the N clamping platforms 5 move away from the center of the bearing platform 2, thereby driving the waterproof membrane to achieve multi-directional synchronous or asynchronous tensile strength. Then install the hollow cylinder, clamp and fix the hollow cylinder with the 3 clamping platforms 5, and ensure that the hollow cylinder and the waterproof membrane are relatively sealed. Then conduct the test according to the preset test plan.

[0044] During the testing process, the deformation, stress, and permeation data of the waterproof membrane under different tensile forces and fluid pressures are collected in real time to complete the performance test under composite working conditions.

[0045] After the test is completed, first open the fluid output pipe to release the pressure inside the hollow cylinder and discharge the residual test medium. Then, control all electric push rods 301 to retract and reset, then control the positioning cylinder 102 to retract and exit the positioning groove. Subsequently, control the clamping cylinder 54 to drive the upper clamping plate 52 to lift, loosen the sealing ring, and remove the hollow cylinder and the waterproof membrane sample that has been tested in sequence. Clean the residual medium in the groove of the bearing platform 2 and the base 1. If it is necessary to adjust the test parameters or replace the sample with a different specification, simply control the electric control pin 511 to retract and unlock, and the clamping platform 5 can be quickly removed from the electric push rod 301. After readjusting the installation position and quantity, the next set of tests can be carried out.

[0046] This implementation method can test the deformation and permeability performance of waterproof membranes under single hydrostatic and air pressure environments, as well as comprehensive performance testing under combined fluid pressure and multi-directional tensile conditions. Furthermore, the quick assembly, disassembly, and position adjustment of the clamping platform allows for the adaptation to waterproof membrane samples of different sizes and specifications, meeting diverse testing needs. Combined with real-time data acquisition from image and pressure sensors, it can accurately acquire the deformation, stress, and permeability of waterproof membranes under different working conditions, providing comprehensive and reliable experimental data support for the performance evaluation of waterproof membranes. In addition, this implementation method features a clear and efficient operation process; residual media can be quickly cleaned and testing parameters adjusted after testing, significantly improving the flexibility and efficiency of testing. It is suitable for waterproof membrane performance testing needs in various scenarios, including laboratories and production lines.

[0047] The third implementation method: It also includes an auxiliary detection system, which comprises a data acquisition module, a data processing module, a control module, and a data storage module; The data acquisition module is used to collect test data for different test conditions; for example, in the multi-directional tensile performance test of the first embodiment, the tensile force data and displacement data of the electric push rod 301 corresponding to each clamping table 5 are collected in real time. In the second embodiment of single fluid pressure permeation deformation detection, the deformation contour image of the waterproof membrane, the stress data on the back of the waterproof membrane, and the fluid pressure data of the detection chamber are acquired in real time.

[0048] The data processing module is used to receive and analyze the test data transmitted by the data acquisition module, and analyze the tensile properties of the waterproof membrane. For example, for the multi-directional tensile test of the first embodiment, the core mechanical performance parameters such as tensile strength, elongation at break, and modulus of elasticity of the waterproof membrane under different tensile directions and different tensile rates are automatically calculated based on the collected tensile force and deformation data. For the single fluid pressure detection in the second implementation method, the maximum deformation and real-time deformation rate of the waterproof membrane are calculated based on the deformation profile data collected by the image sensor, and the deformation resistance and impermeability of the waterproof membrane under the set constant pressure conditions are evaluated in combination with the pressure sensor data.

[0049] The data processing module analyzes the tensile properties of waterproof membranes using existing technologies, which are set up by those skilled in the art based on these technologies. The specific algorithms executed by the data processing module during operation include, for example: (I) Data processing method for multi-directional tensile conditions: A multi-directional tensile mechanical parameter calculation method based on vector decomposition is adopted, including: (S1) Coordinate calibration: Establish a polar coordinate system with the center of the bearing platform (2) as the origin, and record the installation angle θ of each clamping platform (5). i (i=1,2,…,N) and the radial distance r0 from the initial clamping position; (S2) Force decomposition: Real-time tensile force F synchronously collected from each clamping platform (5) i Vector decomposition in orthogonal directions: F X =ΣF i ·cos(θ i ), F_y=ΣF i sin(θ) i ); (S3) Principal stress calculation: Calculate the direction and magnitude of the principal tensile stresses based on the plane stress theory of elasticity, σ 12 =(σ X +σ_y) / 2±√[((σ X -σ_y) / 2)²+τ_xy²], where σ X =F X / A0, σ_y=F_y / A0, τ_xy is derived from the asymmetric tensile component, and A0 is the initial cross-sectional area of ​​the roll material; (S4) Deformation calculation: Based on the displacement sensor data ΔL of each electric actuator (301) i Calculate the engineering strain ε in each direction. i =ΔL i / L0, where L0 is the initial clamping gauge length in the corresponding direction; (S5) Mechanical parameter output: Automatically generates stress-strain curves and calculates tensile strength, elongation at break, and anisotropy index AI=max(σ) in each direction. i ) / min(σ i and elastic modulus E i .

[0050] (II) Data Processing Method for Combined Fluid Pressure and Multi-directional Tension Conditions: A comprehensive evaluation method for waterproof membrane performance under multi-physics coupling is adopted, including: (S1) Reference calibration: First, complete the multi-directional tension under no fluid pressure conditions and collect the reference stress-strain curve as the R0 reference line; (S2) Coupled working condition data registration: When tension and fluid pressure are applied synchronously, the tensile force F is synchronized with the timestamp through a hardware trigger signal. i (t), tensile displacement ΔL i The system consists of four data streams: force / displacement (t), fluid pressure P(t), and deformation contour image sequence Img(t). The sampling rate for tensile force / displacement data is 1kHz, the image data is 5fps, and the pressure data is 100Hz. The force / displacement / pressure signals are subjected to Butterworth low-pass filtering (cutoff frequency 20Hz) to eliminate high-frequency noise. The image data is subjected to adaptive histogram equalization (CLAHE) to enhance the contrast of the deformation contour and Gaussian filtering to remove noise. (S3) Deformation Field Analysis: Based on the digital image correlation (DIC) method, for the sequence of deformation contour images of waterproof membrane acquired by the image sensor, the ROI region is selected in the first frame and a virtual grid is divided (grid spacing 0.5~1mm). For each subsequent frame, the displacement vector u(x,y,t) of each grid node is tracked using the normalized cross-correlation (NCC) algorithm. The strain field ε is calculated from the displacement field. X = u X / x, ε_y= u_y / y、γ_xy= u X / y+ u_y / x, identify the region of maximum principal strain ε_max(t) as the location for fracture risk assessment; (S4) Comprehensive evaluation index: Generate tensile-compression coupled safety envelope (feasible domain boundary with ε as the horizontal axis and P as the vertical axis), calculate composite working condition durability index CDI=∫0^(ε_max) P(ε)dε / (P_max·ε_max), and reflect the internal damage accumulation process of the material through the change of DIC full field strain standard deviation over time, and output damage evolution curve.

[0051] The control module is used to connect to the execution component and control the execution component to perform preset detection actions according to preset detection parameters; The actuators include: clamping cylinder 54, electrically controlled pin 511, electric push rod 301, servo motor 101, positioning cylinder 102, and electrically controlled valve for fluid input / output pipes; Preset detection actions include: during the clamping stage, the control of the electric control pin 511 completes the locking of the clamping table 5 and the electric push rod 301. After the quick connector 3011 is connected, it automatically completes the self-test of the power supply signal path. Then, the control of the clamping cylinder 54 clamps the waterproof membrane or sealing ring according to the set pressure. During the testing phase, for the first type of tensile testing, each electric push rod 301 is controlled to complete synchronous or asynchronous tensile actions according to a preset rate and stroke. When it is necessary to adjust the clamping point or tensile direction, the servo motor 101 is rotated and the positioning cylinder 102 is locked and unlocked in coordination to automatically complete the clamping position adjustment.

[0052] The data storage module is used to classify and store full data for different testing items. The full data includes basic information of the waterproof membrane to be tested, preset testing parameters, raw data transmitted by the data acquisition module, and performance parameters and analysis curves generated by the data processing module. It can be connected to an external laboratory information management system to realize automatic archiving and uploading of test data, providing complete and traceable data support for the product quality inspection and R&D performance testing of waterproof membranes.

[0053] The overall auxiliary testing system can be adapted to three types of testing scenarios: multi-directional tensile testing in the first implementation method, single fluid performance testing in the second implementation method, and composite working condition testing. It can easily automate the testing process and integrate data acquisition and analysis, effectively reduce human operation errors, and improve testing efficiency and result reliability.

[0054] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A multi-directional tensile testing device for waterproof membrane, comprising a base (1), wherein a support platform (2) is fixedly connected to the upper end of the base (1), characterized in that: The base (1) is connected to a tray (11) at its outer end. A rotating ring (3) is rotatably connected between the base (1) and the support platform (2). The rotating ring (3) includes a main ring body (31). The main ring body (31) is provided with a plurality of evenly distributed bosses (32). Each boss (32) is connected to an electric push rod (301). A servo motor (101) for driving the rotating ring (3) to rotate is installed inside the base (1). The top outer side of the support platform (2) is provided with a plurality of circumferentially distributed slots (21). A positioning block (22) is provided in the slots (21). The rotating ring (3) is detachably mounted with at least two clamping platforms (5) via an electric push rod (301). The clamping platform (5) includes a base (51). The base (51) is provided with a clamping mechanism consisting of an upper clamping plate (52) and a lower clamping plate (53). The upper clamping plate (52) has a locking groove that matches the positioning block (22) at one end near the bearing platform (2). The tray (11) and the base (1) are connected by a plurality of positioning cylinders (102) arranged in a circle. The bottom end of the base (51) is provided with a positioning groove that matches the power output end of the positioning cylinder (102). When the electric push rod (301) pushes the clamping table (5) to the set position, the positioning groove matches the position of the positioning cylinder (102).

2. The waterproof membrane multi-directional tensile testing device according to claim 1, characterized in that: The opening of the support platform (2) is provided with a sealing groove. A transparent support plate or a hollow cylinder can be detachably installed in the sealing groove. The outer end of the hollow cylinder is connected to a sealing ring that can be clamped by a clamping mechanism. A fluid input pipe and a fluid output pipe are installed on the hollow cylinder.

3. The waterproof membrane multi-directional tensile testing device according to claim 1, characterized in that: The upper surface of the upper clamping plate (52) and the upper surface of the bearing platform (2) are located on the same plane.

4. The waterproof membrane multi-directional tensile testing device according to claim 1, characterized in that: One end of the base (51) is connected to a clamping cylinder (54) for driving the upper clamping plate (52) to move vertically. An electric control pin (511) for locking the telescopic end of the electric push rod (301) is installed inside the base (51). The top of the telescopic end of the electric push rod (301) is provided with a locking hole that matches the telescopic end of the electric control pin (511).

5. The waterproof membrane multi-directional tensile testing device according to claim 2, characterized in that: The support platform (2) has a through hole in the middle, and the base (1) has a groove that matches the through hole. At least one guide pipe is connected to the bottom of the groove.

6. The waterproof membrane multi-directional tensile testing device according to claim 5, characterized in that: Sensors for detecting the stretching condition of the roll material on the support platform (2) are installed in both the through hole and the groove.

7. The waterproof membrane multi-directional tensile testing device according to claim 4, characterized in that: The power output end of the electric push rod (301) is also connected to a quick-connect plug (3011). The base (51) is provided with a socket that matches the quick-connect plug (3011). When the telescopic end of the electric control pin (511) is inserted into the locking hole, the quick-connect plug (3011) connects with the socket.

8. The waterproof membrane multi-directional tensile testing device according to any one of claims 1-7, characterized in that: It also includes an auxiliary detection system, which comprises a data acquisition module, a data processing module, a control module, and a data storage module; The data acquisition module is used to collect test data for different testing conditions; The data processing module is used to receive and analyze the test data transmitted by the data acquisition module and analyze the tensile properties of the waterproof membrane; the control module is used to connect with the execution component and control the execution component to perform preset test actions according to preset test parameters. The data storage module is used to classify and store the full data of different testing items.

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