Waterproof roll tearing detection device

Abstract

The invention relates to the technical field of waterproof roll detection, and discloses a waterproof roll tearing detection device which comprises a base, guide columns are vertically arranged on the two sides of the base, top plates located on the two sides of the base are fixedly connected to the ends of the guide columns, and a movable cross beam is slidably connected to the sides, away from the base, of the guide columns. One side, close to the base, of the guide column is fixedly connected with a fixed cross beam, the device further comprises a plurality of pairs of guide rods which are coaxially arranged, one of each pair of guide rods penetrates through the movable cross beam in a sliding mode, the other guide rod penetrates through the fixed cross beam in a sliding mode, and the guide rods and the fixed cross beam are oppositely arranged in the axial direction. Through the innovative multi-sample synchronous driving and transmission design, the inherent defect that traditional equipment can only carry out single-sample sequential testing is effectively overcome. The tearing test of a plurality of groups of samples under completely synchronous and consistent experimental conditions is realized, and the accuracy and comparability of contrast experimental data are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of waterproof membrane testing technology, specifically a waterproof membrane tear detection device. Background Technology

[0002] Tear performance testing of waterproof membranes is a core step in evaluating their physical and mechanical properties, directly impacting their reliability during actual construction and use. This test aims to determine the membrane's ability to resist puncture by sharp objects or tearing by localized external forces, serving as a key indicator of its durability under installation, overlapping, and long-term service conditions. Currently, this test strictly adheres to the national standard GB / T328 series, "Test Methods for Waterproof Membranes in Buildings." Due to significant differences in material properties and mechanical behavior between asphalt-based and polymer-based waterproof membranes, the standard specifies different specimen shapes and testing procedures, but both essentially involve tear strength testing using a tensile testing machine. Accurate and reliable tear performance data is crucial for ensuring the quality of waterproofing projects, optimizing material formulations, and standardizing construction techniques.

[0003] However, current testing methods generally rely on general-purpose tensile testing machines equipped with specialized fixtures. This method can only clamp and test one specimen at a time, and even when control or parallel experiments are required, each specimen can only be tested sequentially and in batches. Because environmental conditions and equipment status may fluctuate slightly during the experiment, this asynchronous sequential testing method introduces additional systematic errors and time variables, making it difficult to maintain completely consistent testing conditions between different specimens. Therefore, the comparability and accuracy of the obtained experimental data are affected, making it difficult to accurately reflect subtle differences in the material's inherent properties or the true impact of process changes. Therefore, there is an urgent need to develop a tear testing device that can simultaneously test multiple specimens under the same conditions to improve testing efficiency and, in particular, ensure the accuracy and reliability of control experimental results. Summary of the Invention

[0004] This invention provides a waterproof membrane tear detection device, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A waterproof membrane tear detection device includes a base, guide columns vertically arranged on both sides of the base, and top plates located on both sides of the base fixedly connected to the ends of the guide columns. A movable crossbeam is slidably connected to the side of the guide column away from the base, and a fixed crossbeam is fixedly connected to the side of the guide column closer to the base. It also includes multiple pairs of coaxially arranged guide rods, one of which slidably passes through the movable crossbeam and the other slidably passes through the fixed crossbeam, and the two are arranged opposite each other along the axial direction. A tension sensor is arranged between the guide rod on the fixed crossbeam and the base. The device also includes a clamping mechanism and a tensioning mechanism. The clamping mechanism is located at the adjacent ends of the two opposite guide rods in each pair for clamping and fixing the waterproof membrane sample. The tensioning mechanism is located on the back of the device for driving the two coaxially arranged guide rods to separate at a constant speed.

[0007] As a preferred embodiment of the present invention, the tensioning mechanism includes a push plate slidably disposed on the guide column, a fixing block fixedly connected to the guide column, and an ejection device for adjusting the height of the push plate disposed on the fixing block. One end of the traction cable is connected to the side of the push plate, and a movable pulley is disposed at the end of the guide rod located on the movable crossbeam away from the base. The traction cable is wrapped around the movable pulley. When the push plate slides along the guide column, the traction cable drives the guide rod to slide relative to the movable crossbeam through the movable pulley.

[0008] As a preferred embodiment of the present invention, the end of the traction cable away from the push plate is connected to a length fine-tuning component disposed on the movable crossbeam, and a pulley guide component for maintaining the tension of the traction cable is disposed on the back of the device. When only the movable crossbeam is driven to slide along the guide post, the push plate is at a constant height.

[0009] As a preferred embodiment of the present invention, the pulley guide assembly includes a first rotating rod, a second rotating rod, and a third rotating rod spaced apart along the length of the top plate. A fourth rotating rod is provided on the side of the movable crossbeam, and a fifth rotating rod is provided on the base. Fixed pulleys that cooperate with the traction cable are rotatably connected to the first, second, third, fourth, and fifth rotating rods. The traction cable starts from one end connected to the push plate, passes sequentially around the fourth rotating rod, the fifth rotating rod, the third rotating rod, the first rotating rod, the movable pulley, and the second rotating rod, and then connects to the length fine-tuning assembly.

[0010] In a preferred embodiment of the present invention, the length fine-tuning assembly includes a lifting screw fixedly connected to the movable crossbeam, and a rotating sleeve is externally threaded onto the lifting screw. The end of the rotating sleeve is rotatably connected to the end of the traction cable.

[0011] As a preferred embodiment of the present invention, the guide column is provided with a height locking device for limiting the initial position of the movable crossbeam.

[0012] As a preferred embodiment of the present invention, the clamping mechanism includes a flat clamp disposed at the end of the guide rod, and a nail rod clamping adapter is detachably connected inside the flat clamp near the fixed crossbeam. The waterproof membrane sample includes a trouser-shaped sample and a long strip sample. Both ends of the trouser-shaped sample are directly connected to the flat clamp, one end of the long strip sample is connected to the flat clamp, and the other end of the long strip sample is connected to the nail rod clamping adapter.

[0013] As a preferred embodiment of the present invention, the flat plate clamp includes a U-shaped frame fixedly connected to the guide rod. Fixed clamping plates and movable clamping plates are respectively provided on the inner walls of both sides of the U-shaped frame. The fixed clamping plates are fixedly connected to the U-shaped frame, and the movable clamping plates are rotatably connected to a locking screw threadedly connected to the U-shaped frame.

[0014] As a preferred embodiment of the present invention, the nail clamping adapter includes an adapter plate disposed between a movable clamping plate and a fixed clamping plate, and a U-shaped fork head is provided at the end of the adapter plate. An insert nail rod for piercing and supporting the end of a long strip sample is provided on the U-shaped fork head.

[0015] The present invention has the following advantages:

[0016] 1. Improved experimental accuracy and comparability: Through the mechanical synchronous transmission design, multiple groups (e.g., five groups) of samples can be subjected to tearing tests at the same time, in the same environment, and under the same driving conditions, completely eliminating systematic errors introduced by temperature and humidity fluctuations and minor changes in equipment status caused by sequential testing. This makes the data from comparative and parallel experiments highly comparable and reliable, and more accurately reflects the differences in material properties or the effects of process improvements.

[0017] 2. Significantly improves testing efficiency: Multiple samples can be tested at once, increasing testing efficiency several times over. It is particularly suitable for factory inspections of manufacturing enterprises, batch sampling inspections of quality control departments, and scenarios where research and development institutions need to conduct a large number of parallel comparative experiments, significantly reducing time costs.

[0018] 3. Easy to operate and highly adaptable: The unique pulley guide assembly design eliminates the need to readjust the initial position of the drive plate when adjusting the height of the movable crossbeam to accommodate specimens of different standard lengths, simplifying the operation. The modular clamping mechanism design (flat plate clamp and nail bar clamping adapter) allows for quick switching and compatibility with various testing methods specified in GB / T standards, such as the trouser tear method, right-angle tear method, and nail bar tear method, making it a multi-purpose device.

[0019] 4. Reliable data and precise control: Each channel is independently equipped with a high-precision tensile sensor and length fine-tuning component, ensuring the consistency of preload force for each sample and the independence and accuracy of force value acquisition. Employing precision drive components such as servo motors and ball screws, precise and stable control of the tensile speed can be achieved, fully meeting the stringent requirements of national standards.

[0020] 5. Stable structure and strong expandability: Based on a robust gantry frame structure, the stability of the testing process is ensured. The number of guide rods can be increased or decreased according to actual needs (such as three pairs, five pairs or more), providing good modular expansion potential. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a tear detection device for waterproof membrane.

[0023] Figure 2 This is a front view of a waterproof membrane tear detection device.

[0024] Figure 3 This is a schematic diagram of the clamping mechanism in a waterproof membrane tear detection device.

[0025] Figure 4 This is a front view of the clamping mechanism in a waterproof membrane tear detection device.

[0026] Figure 5 This is a schematic diagram of the structure of a waterproof membrane sample after separation from the clamping mechanism in a waterproof membrane tear detection device.

[0027] Figure 6 for Figure 5 The front view.

[0028] Figure 7 This is a schematic diagram of the tensile mechanism in a waterproof membrane tear detection device.

[0029] Figure 8 This is a schematic diagram of the pulley guide assembly in a waterproof membrane tear detection device.

[0030] Figure 9 for Figure 8 The right view.

[0031] Figure 10 for Figure 8A magnified view of part A in the diagram.

[0032] In the diagram: 1. Base; 2. Guide column; 3. Fixed crossbeam; 4. Movable crossbeam; 5. Guide rod; 6. Clamping mechanism; 7. Tensioning mechanism; 8. Height locking device; 9. Tension sensor; 10. Flat plate clamp; 11. Nail rod clamping adapter; 12. Trouser-shaped specimen; 13. Long strip specimen; 14. Adapter plate; 15. U-shaped fork head; 16. Insert nail rod; 17. U-shaped frame; 18. Fixed clamping plate; 19. 20. Movable clamping plate; 21. Locking screw; 22. Push plate; 23. Ejection device; 24. Fixing block; 25. Traction cable; 26. Length fine-tuning assembly; 27. Movable pulley; 28. First rotating rod; 29. ​​Fixed pulley; 30. Second rotating rod; 31. Third rotating rod; 32. Fourth rotating rod; 33. Fifth rotating rod; 34. Pulley guide assembly; 35. Lifting screw; 36. Rotating sleeve; 37. Top plate. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In one embodiment, see Figure 1 and Figure 2 A tear detection device for waterproof membrane is disclosed. In its normal operating state, the device is placed vertically, with its main structure forming a vertical load-bearing frame. It should be noted that because the drive and transmission system of this device does not rely on gravity, it can also be placed tilted or horizontally to complete the test, thus offering greater adaptability. For clarity, the following description will use directional terms such as "up," "down," "front," "back," "left," and "right" based on the conventional vertical placement. These definitions are only used to explain relative positional relationships and do not restrict the actual direction of use of the device.

[0035] The device includes a base 1 that serves as the overall support foundation. The base 1 is typically a rigid plate structure, which can be stably placed on a testing platform or the ground to ensure stability during testing. At the four corners of the upper surface of the base 1, four guide columns 2 are vertically fixed, together forming the three-dimensional frame of the device. The tops of the four guide columns 2 are fixedly connected by a horizontally positioned top plate 36, thus forming a robust gantry-style frame structure with the base 1. The top plate 36 extends in the front-to-back direction and is located above the left and right sides of the base 1.

[0036] Inside the frame, there is a movable crossbeam 4 that can slide up and down along the guide post 2. The movable crossbeam 4 is set in a roughly horizontal direction and is slidably connected to the guide post 2 through a mechanism such as a linear bearing or a sliding sleeve. Its height is adjustable to accommodate specimens of different lengths. Below the movable crossbeam 4, a fixed crossbeam 3 is fixedly installed on the guide post 2. The fixed crossbeam 3 is also set horizontally, and its position relative to the base 1 remains unchanged, parallel to and opposite the movable crossbeam 4. The movable crossbeam 4 and the fixed crossbeam 3 form the execution plane for specimen clamping and stretching.

[0037] To enable simultaneous testing of multiple sets of samples, the device is equipped with multiple pairs of guide rods 5. These guide rods 5 are vertically arranged, with each pair of guide rods 5 coaxially aligned vertically. The upper guide rod 5 slidably passes through the movable crossbeam 4, while the lower guide rod 5 slidably passes through the fixed crossbeam 3. All guide rods 5 are evenly arranged from left to right on the movable crossbeam 4 and the fixed crossbeam 3. As a preferred embodiment, five pairs of guide rods 5 can be set to simultaneously conduct parallel tear tests on five sets of waterproof membrane samples, greatly improving testing efficiency. At the opposite ends of each pair of guide rods 5, a clamping mechanism 6 for holding the sample is installed. Between the end of the guide rod 5 below the fixed crossbeam 3 and the base 1, a high-precision tensile sensor 9 is installed to monitor and record the tear force value borne by the sample during the test in real time. The drive unit of the device, namely the tensioning mechanism 7, is mainly integrated on the back side of the device (defined as the side away from the operator). It is responsible for driving the upper guide rod 5 to move at a constant speed, so that the pair of guide rods 5 produce synchronous and equal-speed reverse linear motion, thereby applying a standard tensile load to the specimen.

[0038] In one instance of this embodiment, please refer to Figure 2 , Figure 7 , Figure 8 , Figure 9 and Figure 10 The stretching mechanism 7 includes a push plate 21 disposed below the guide post 2. The push plate 21 is positioned laterally on the rear side of the device, with its left and right ends slidably connected to the left and right guide posts 2 respectively. A fixing block 23 is fixedly connected below the two guide posts 2 at the rear position, and an ejector device 22 is disposed on the lower surface of the fixing block 23. The ejector device 22 is preferably a precision ball screw mechanism driven by a servo motor, or a high-precision electric push rod can also be used. The push plate 21 can move vertically along the guide post 2 at a preset constant speed under the drive of the ejector device 22.

[0039] A movable pulley 26 is installed at the upper end of the guide rod 5, and an independent traction cable 24 is connected at one end to the upper part of the push plate 21. After being reversed by a carefully arranged pulley guide assembly 33, the traction cable 24 passes around the corresponding movable pulley 26, and finally its other end is connected to a length fine-tuning assembly 25.

[0040] The pulley guide assembly 33 includes a first rotating rod 27, a second rotating rod 29, a third rotating rod 30, a fourth rotating rod 31, and a fifth rotating rod 32 arranged in a left-right orientation. Each of the first rotating rod 27, second rotating rod 29, third rotating rod 30, fourth rotating rod 31, and fifth rotating rod 32 is rotatably connected to a fixed pulley 28 that cooperates with the traction cable 24. These are sequentially and fixedly positioned. The first rotating rod 27 is fixedly connected to the front end of the top plate 36. The second rotating rod 29 is positioned at a lower middle position of the top plate 36 (to avoid the second rotating rod 29 affecting the normal movement of the traction cable 24 located between the first rotating rod 27 and the third rotating rod 30). The third rotating rod 30 is fixedly connected to the rear end of the top plate 36. The fourth rotating rod 31 is positioned on the rear side of the lower surface of the movable crossbeam 4, and the fifth rotating rod 32 is positioned on the rear side of the upper surface of the base 1.

[0041] The specific routing path of the traction cable 24 is as follows (taking a single route as an example): Starting from the connection point, it goes upward from the push plate 21, first passing over the top of the fourth rotating rod 31, then downward passing under the fifth rotating rod 32, then upward passing over the top of the third rotating rod 30, then forward horizontally passing over the top of the first rotating rod 27, then downward and backward passing under the movable pulley 26 at the top of the corresponding guide rod 5, and finally upward passing over the top of the second rotating rod 29, with its end fixed to the length fine-tuning component 25.

[0042] This path design achieves two important functions: First, it converts the vertical downward movement of the push plate 21 into the vertical upward movement of the upper guide rod 5 via the pulley guide assembly 33. According to the principle of the movable pulley 26, the displacement speed of the push plate 21 is twice that of the guide rod 5. Therefore, when setting the speed of the ejector device 22, a corresponding conversion is required to ensure that the tensile speed of the sample meets the standard requirements (such as (100±10) mm / min as specified in GB / T 328). Second, the pulley guide assembly 33 constitutes a "compensation loop." When the initial height of the movable crossbeam 4 is adjusted up and down to accommodate samples of different lengths, the movable crossbeam 4 drives the fourth fixed rotating rod and the movable pulley 26 to rise and fall together. Since the path of the traction cable 24 includes the loop formed by the fourth rotating rod 31 and the fifth rotating rod 32, the rising and falling of the movable crossbeam 4 does not change the effective working length of the traction cable 24 between the push plate 21 and the movable pulley 26, thus the initial position of the push plate 21 does not need to be adjusted accordingly. This greatly simplifies the operation process and improves the ease of use of the equipment.

[0043] To lock the movable crossbeam 4 after its height is adjusted and to prevent accidental movement during testing, a height locking device 8 is also provided on the guide post 2. This device can be a U-shaped clamp with fastening bolts, straddling the upper and lower sides of the movable crossbeam 4 and locking it to the guide post 2, thereby fixing the relative position of the movable crossbeam 4 and the guide post 2.

[0044] The length fine-tuning component 25 is mounted on the upper surface of the movable crossbeam 4. After the specimen is installed, it allows for independent micro-tension adjustment of each traction cable 24, ensuring all specimens have a consistent and appropriate preload before testing begins, while eliminating slack caused by machining or assembly errors in each transmission path. The length fine-tuning component 25 includes a lifting screw 34 vertically fixed to the movable crossbeam 4 and a rotating sleeve 35 threadedly engaged with the lifting screw 34. The end of the traction cable 24 is attached to the rotating sleeve 35. By rotating the rotating sleeve 35, it can be moved up and down along the lifting screw 34, thereby finely adjusting the total length of the traction cable 24 in that path and achieving individual setting of the preload for the corresponding specimen.

[0045] In one instance of this embodiment, please refer to Figures 2-6 The clamping mechanism 6 is a key component that directly contacts the specimen and performs the fixation function. Each pair of guide rods 5's end clamping mechanism 6 mainly includes a flat plate clamp 10. The upper guide rod 5 connects to the upper flat plate clamp 10, and the lower guide rod 5 connects to the lower flat plate clamp 10. To accommodate different specimen types specified in national standards, the lower flat plate clamp 10 is designed to be compatible with the nail rod clamping adapter 11.

[0046] The flat clamp 10 specifically includes a U-shaped frame 17 fixedly connected to the end of the guide rod 5. A fixed clamping plate 18 is fixed to the rear inner wall of the U-shaped frame 17. A movable clamping plate 19, which can move back and forth, is provided on the front side of the U-shaped frame 17. The front side of the movable clamping plate 19 is rotatably connected to the rear end of a locking screw 20 via a bearing. The locking screw 20 passes forward through the front wall of the U-shaped frame 17 and is threaded into it. By turning the knob or handle at the front end of the locking screw 20, the movable clamping plate 19 can be driven to move back and forth, thereby working in conjunction with the fixed clamping plate 18 to firmly clamp the end of the sample placed between them. To enhance the reliability of clamping and prevent sample slippage, mesh-like patterns or serrated anti-slip protrusions are usually machined on the clamping surfaces of the fixed clamping plate 18 and the movable clamping plate 19. For trouser-shaped tear samples or right-angle tear samples, their upper and lower legs can be directly inserted into the corresponding upper and lower flat clamps 10 and clamped by the locking screw 20.

[0047] For the elongated specimen 13 used in the shank tear test, a shank clamping adapter 11 is required. The shank clamping adapter 11 includes a transition plate 14 that can be inserted between the fixed clamping plate 18 and the movable clamping plate 19 of the lower flat clamp 10. The top of the transition plate 14 extends and is fixed with a U-shaped fork 15. During testing, the transition plate 14 of the shank clamping adapter 11 is first clamped and locked in the lower flat clamp 10, just like the specimen. Then, an insertion shank 16 (usually a steel rod of standard diameter) is passed through a pre-drilled hole at the lower end of the elongated specimen 13 or directly pierces the specimen. The two ends of the insertion shank 16 are then positioned on the U-shaped fork 15. The upper end of the elongated specimen 13 remains clamped by the upper flat clamp 10. This design allows for quick switching of the clamping mechanism 6 to meet the needs of different testing standards.

[0048] The working process of the device of the present invention is clear and easy to operate. The following description is based on specific test steps:

[0049] 1. Preparation and Installation: Place the device securely in the experimental environment. Loosen the fastening bolts of the height locking device 8, and adjust the movable crossbeam 4 to a suitable height manually or through the auxiliary lifting mechanism according to the standard required length of the waterproof membrane sample to be tested (such as the initial spacing of the clamps). Then tighten the height locking device 8.

[0050] 2. Fixture Configuration and Sample Clamping: Select the fixture configuration according to the test standard (trouser method or nail bar method). If using the nail bar method, first insert the adapter plate 14 of the nail bar clamping adapter 11 into the lower flat clamp 10 and clamp it. Then, clamp the sample on each pair of clamping mechanisms 6 in sequence: For the trouser-shaped sample 12, place its two "trouser legs" into the upper and lower flat clamps 10 respectively and tighten the locking screw 20; for the long strip sample 13, clamp the upper end with the upper flat clamp 10, and after inserting the nail bar 16, place it on the U-shaped fork head 15 of the installed nail bar clamping adapter 11.

[0051] 3. Preload Setting: After all samples are clamped, operate the length fine-tuning components 25 of each path one by one. Slowly rotate the sleeve 35 to retract the traction cable 24, causing the upper guide rod 5 to rise slightly until the lower tension sensor 9 detects the small initial load (preload, such as 5N) specified in the standard. This step ensures that all samples are under the same tension at the start of the test and that there is no slack in the transmission system.

[0052] 4. Test Execution: Set test parameters, such as tensile speed, through the control unit (lower-level computer or connected upper-level computer software) (which needs to be converted to the actual driving speed of the push plate 21 based on the transmission ratio of the movable pulley 26). Start the ejection device 22, and the push plate 21 moves downward at a constant speed. Through the transmission of the traction cable 24 and the pulley guide assembly 33, all the upper guide rods 5 are pulled upward synchronously and at the same speed, thereby applying tearing force to all waterproof membrane samples. Throughout the process, the tension sensors 9 of each path collect force data in real time and continuously, and transmit it to the data acquisition system.

[0053] 5. Data Acquisition and Experiment Termination: The control system monitors the force-displacement or force-time curves in real time. The test is considered complete when the tear force of the sample drops to a specific percentage of the peak force according to the standard (as determined by the standard), or when the specified tear displacement is reached. The ejection device 22 stops after all samples have completed tearing. The control unit automatically records and saves key data such as the maximum tear force and tear strength of each sample. Furthermore, an extensometer can be installed on the fixed beam 3 to more accurately detect changes in the tensile distance of the waterproof membrane sample.

[0054] 6. Sample Removal and Reset: Loosen the locking screws of each plate clamp 10, remove the tested sample and any applicable nail rod clamping adapter 11. Reset the push plate 21 to its initial position to prepare for the next round of testing.

[0055] This invention provides a tear testing device for waterproof membranes. Through an innovative multi-sample synchronous drive and transmission design, it effectively overcomes the inherent limitation of traditional equipment that can only perform sequential single-sample testing. It enables multiple groups of samples to undergo tear testing under completely synchronized and consistent experimental conditions, greatly improving the accuracy and comparability of comparative experimental data. Simultaneously, multiple samples can be tested in a single test, significantly improving testing efficiency. Furthermore, the unique pulley-guided compensation structure allows the device to easily adapt to samples of different lengths, while the modular clamping mechanism ensures compatibility with multiple national standard testing methods, such as the trouser method and the nail bar method, offering flexible operation. The entire machine is structurally stable, precisely controlled, and provides reliable data, offering an efficient and accurate testing method for the quality control and performance research of waterproof membranes.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A tear detection device for waterproof membrane, comprising a base, guide columns vertically arranged on both sides of the base, top plates located on both sides of the base being fixedly connected to the ends of the guide columns, a movable crossbeam being slidably connected to the side of the guide column away from the base, and a fixed crossbeam being fixedly connected to the side of the guide column closer to the base, characterized in that, It also includes multiple pairs of coaxially arranged guide rods, one of which can slide through the movable crossbeam and the other can slide through the fixed crossbeam, and the two are arranged opposite each other along the axial direction. A tension sensor is provided between the guide rod on the fixed crossbeam and the base. It also includes a clamping mechanism and a tensioning mechanism. A clamping mechanism, located at the adjacent ends of each pair of opposing guide rods, is used to clamp and fix the waterproof membrane sample. The tensioning mechanism, located on the back of the device, is used to drive two coaxially arranged guide rods to separate at a constant speed.

2. The waterproof membrane tear detection device according to claim 1, characterized in that, The tensioning mechanism includes a push plate slidably mounted on the guide column, a fixed block fixedly connected to the guide column, and an ejector device for adjusting the height of the push plate on the fixed block. One end of the traction cable is connected to the side of the push plate, and a movable pulley is provided at the end of the guide rod located on the movable crossbeam away from the base. The traction cable is wrapped around the movable pulley. When the push plate slides along the guide column, the traction cable drives the guide rod to slide relative to the movable crossbeam through the movable pulley.

3. The waterproof membrane tear detection device according to claim 2, characterized in that, The end of the traction cable away from the push plate is connected to a length fine-tuning component set on the movable crossbeam. The back of the device is provided with a pulley guide component to keep the traction cable tensioned. When only the movable crossbeam is driven to slide along the guide post, the push plate is at a constant height.

4. The waterproof membrane tear detection device according to claim 3, characterized in that, The pulley guide assembly includes a first rotating rod, a second rotating rod, and a third rotating rod spaced apart along the length of the top plate. A fourth rotating rod is provided on the side of the movable crossbeam, and a fifth rotating rod is provided on the base. Fixed pulleys that cooperate with the traction cable are rotatably connected to the first, second, third, fourth, and fifth rotating rods. The traction cable starts from one end connected to the push plate, passes sequentially around the fourth rotating rod, the fifth rotating rod, the third rotating rod, the first rotating rod, the movable pulley, and the second rotating rod, and then connects to the length fine-tuning assembly.

5. The waterproof membrane tear detection device according to claim 3, characterized in that, The length fine-tuning assembly includes a lifting screw fixedly connected to the movable crossbeam, and a rotating sleeve is externally threaded onto the lifting screw. The end of the rotating sleeve is rotatably connected to the end of the traction cable.

6. The waterproof membrane tear detection device according to claim 1, characterized in that, The guide column is equipped with a height locking device for limiting the initial position of the movable crossbeam.

7. The waterproof membrane tear detection device according to claim 1, characterized in that, The clamping mechanism includes a flat clamp located at the end of the guide rod. The flat clamp, located near the fixed crossbeam, has a nail rod clamping adapter detachably connected inside. The waterproof membrane sample includes a trouser-shaped sample and a long strip sample. Both ends of the trouser-shaped sample are directly connected to the flat clamp. One end of the long strip sample is connected to the flat clamp, and the other end of the long strip sample is connected to the nail rod clamping adapter.

8. The waterproof membrane tear detection device according to claim 7, characterized in that, The flat plate clamp includes a U-shaped frame fixedly connected to the guide rod. Fixed clamping plates and movable clamping plates are respectively provided on the inner walls of both sides of the U-shaped frame. The fixed clamping plates are fixedly connected to the U-shaped frame, and the movable clamping plates are rotatably connected to a locking screw threaded to the U-shaped frame.

9. A tear detection device for waterproof membrane according to claim 7, characterized in that, The nail clamping adapter includes an adapter plate disposed between a movable clamping plate and a fixed clamping plate. The end of the adapter plate is provided with a U-shaped fork head, and an insertion nail rod for piercing and supporting the end of a long strip sample is inserted through the U-shaped fork head.

Images