A tear strength clamp

Abstract

This application relates to the field of material tear performance testing, and more particularly to a tear strength fixture, which includes a clamping base plate, a clamping top plate, and a nail rod. Two sets of clamping base plates and clamping top plates are provided, and the two sets of clamping base plates and clamping top plates are detachably installed on the top and bottom of a tension frame. The clamping base plate is L-shaped, with several first sliding holes and several elliptical sliding holes extending through it. Several second sliding holes are extending through the surface of the clamping top plate, and several adjusting screw holes are provided on the clamping top plate. The clamping base plate is horizontally connected to the clamping top plate by adjusting bolts, which pass through the elliptical sliding holes and are threaded into the adjusting screw holes. A limiting nut is threaded to the other end of a limiting bolt. A clamping gap is provided between the clamping top plate and the clamping base plate, and the clamping top plate slides along the length of the limiting bolt to engage with the clamping base plate. This application improves the ease of adjusting the clamping gap.

Description

Technical Field

[0001] This application relates to the field of material tear performance testing, and in particular to a tear strength fixture. Background Technology

[0002] Waterproof membrane is a core material for building waterproofing, widely used in roofs, basements, kitchens, bathrooms, and other areas prone to water seepage. It effectively blocks rainwater and groundwater from penetrating, preventing building structures from becoming damp, moldy, and corroding steel bars, protecting indoor facilities from water damage, and extending the building's lifespan. Simultaneously, the production of waterproof membrane requires a nail-bar tear strength test to prevent tearing that could lead to waterproofing failure. The nail-bar tear strength test involves first fixing both ends of the waterproof membrane to two membrane clamps. Then, the membrane clamps are fixed to a tension frame, and the tension frame is used to pull on the two membrane clamps, thus measuring the tensile strength of the waterproof membrane.

[0003] In existing related technologies, traditional roll material clamps include a clamping top plate, a clamping bottom plate, and nail rods. The clamping top plate and the clamping bottom plate are connected by connectors, and a clamping gap is provided between the clamping top plate and the clamping bottom plate. The waterproof roll material is placed in the clamping gap and fixed by the nail rods. It is then fixed to a tension frame and tested.

[0004] Regarding the aforementioned technologies, in actual use, existing roll clamps cannot adjust the clamping gap, making it inconvenient to fix the waterproof roll to the clamp. Summary of the Invention

[0005] To improve the ease of adjusting the clamping gap, this application provides a tear strength clamp.

[0006] The tear strength clamp provided in this application adopts the following technical solution: A tear strength clamp includes a clamping base plate, a clamping top plate, and a nail rod. The clamping base plate and the clamping top plate are arranged in pairs, and there are two sets of clamping base plates and clamping top plates. The two sets of clamping base plates and clamping top plates are detachably installed on the top and bottom of a tension frame. The clamping base plate is L-shaped and has several first sliding holes and several elliptical sliding holes. These elliptical sliding holes are paired at the L-shaped protruding ends of the clamping base plate. The clamping top plate has several second sliding holes that mate with the first sliding holes. The clamping top plate has several adjusting screw holes that are opposite to the elliptical sliding holes. The clamping base plate is horizontally connected to the clamping top plate by adjusting bolts. The adjusting bolts pass through the elliptical sliding holes and are threaded into the adjusting screw holes. The clamping base plate is connected to the clamping top plate by limiting bolts. A limiting nut is threaded onto the other end of the limiting bolts. A clamping gap exists between the clamping top plate and the clamping base plate. The clamping top plate slides along the length of the limiting bolts to engage with the clamping base plate.

[0007] By adopting the above technical solution, when it is necessary to measure the tear strength of a portion of the waterproof membrane, the waterproof membrane can be positioned within the clamping gap. At this time, the clamping top plate is limited by the limiting bolt and the limiting nut. Because the adjusting bolt's thread engages with the adjusting screw hole, adjusting the position of the adjusting bolt through the elliptical sliding hole causes the clamping top plate to slide along the length of the limiting bolt, thereby adjusting the clamping gap. This effectively improves the convenience of adjusting the clamping gap, making the fixing of the waterproof membrane more convenient.

[0008] The clamping base plate has a first nail hole through it, and the clamping top plate has a second nail hole through it. The second nail hole is opposite to the first nail hole, and the nail rod passes through the first nail hole, the clamping gap, and the second nail hole in sequence.

[0009] By adopting the above technical solution, the waterproof membrane set in the clamping gap can be fixed by the nail rod, which makes the waterproof membrane more stable when pulled and facilitates more accurate data measurement.

[0010] Optionally, the clamping base plate is provided with a connecting column, the connecting column has a first connecting hole, the top and bottom of the tension frame are provided with electric telescopic cylinders, the electric telescopic cylinders have a second connecting hole, the electric telescopic cylinders are sleeved on the connecting column, the first connecting hole and the second connecting hole are arranged to overlap, and the clamping base plate is connected to the electric telescopic cylinders by connecting bolts.

[0011] By adopting the above technical solution, the clamping base plate can be connected to the electric telescopic cylinder via a threaded connection, thereby enabling tear strength testing of the waterproof membrane. The threaded connection not only makes the clamping base plate connection more stable but also improves the ease of assembly and disassembly.

[0012] Optionally, the clamping top plate has an observation grid.

[0013] By adopting the above technical solution, the position of the waterproof membrane in the clamping gap can be observed by observing the grid, which makes it easier for the nail rod to accurately fix the waterproof membrane in the area to be tested, thereby improving the accuracy of the tear strength test.

[0014] Optionally, the limiting nut is a wing nut.

[0015] By adopting the above technical solution, the wing nut is characterized by its ease of manual operation, allowing it to be tightened or loosened without the aid of tools, thus improving the convenience of operation.

[0016] Optionally, a limiting spring is provided between the clamping base plate and the clamping top plate, and the limiting bolt passes through the limiting spring.

[0017] By adopting the above technical solution, when the limiting nut is loosened, the clamping top plate will be subject to the elastic force of the limiting spring, which will enable it to quickly separate from the clamping bottom plate, thereby achieving the effect of quick assembly and disassembly of the clamping bottom plate and the clamping top plate.

[0018] Optionally, the clamping base plate is provided with elastic sliding members on both sides, and the tension frame is provided with sliding tracks on both sides, with the elastic sliding members and sliding tracks being adapted to each other.

[0019] By adopting the above technical solution, the elastic sliding component can be inserted into the sliding track, thereby enabling the waterproof membrane to expand and contract in a fixed vertical plane, thus ensuring the accuracy of the tear strength test.

[0020] Optionally, the tension frames are arranged symmetrically.

[0021] By adopting the above technical solution, the symmetrical structure can make the clamps on both sides bear forces in a balanced manner, avoiding deviations in test results due to uneven force.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. When tear strength measurement of a portion of the waterproof membrane is required, the membrane can be positioned within the clamping gap. In this case, the clamping top plate is limited by the limiting bolt and the limiting nut. Because the adjusting bolt's thread engages with the adjusting screw hole, adjusting the position of the adjusting bolt through the elliptical sliding hole causes the clamping top plate to slide along the length of the limiting bolt, thereby adjusting the clamping gap. This effectively improves the ease of adjusting the clamping gap, making the fixation of the waterproof membrane more convenient. 2. The clamping base plate can be connected to the electric telescopic cylinder via a threaded connection, thereby enabling tear strength testing of the waterproof membrane. The threaded connection not only makes the clamping base plate connection more stable but also improves the ease of assembly and disassembly. 3. By observing the grid, the position of the waterproof membrane in the clamping gap can be observed, which makes it easier to accurately fix the waterproof membrane in the area to be tested with the nail rod, thereby improving the accuracy of the tear strength test. Attached Figure Description

[0023] Figure 1 This is a schematic diagram showing the connection between the clamping base plate and the tension frame in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the clamping base plate in the embodiments of this application.

[0025] Figure 3 This is a schematic diagram of the clamping top plate in an embodiment of this application.

[0026] Figure 4 This is a schematic diagram of the cooperation between the elastic sliding member and the sliding track in the embodiments of this application.

[0027] Figure 5 yes Figure 4 Enlarged schematic diagram of part A.

[0028] Explanation of reference numerals in the attached drawings: 1. Clamping base plate; 101. Clamping gap; 102. First sliding hole; 103. Elliptical sliding hole; 104. First connecting hole; 11. Adjusting bolt; 12. Limiting bolt; 13. Limiting nut; 14. Limiting spring; 15. Connecting column; 16. Connecting bolt; 17. Elastic sliding component; 2. Clamping top plate; 201. Second sliding hole; 202. Adjusting screw hole; 21. Observation grid; 3. Nail rod; 301. First nail hole; 302. Second nail hole; 4. Tension frame; 401. Second connecting hole; 41. Electric telescopic cylinder; 42. Sliding track. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0030] This application discloses a tear strength clamp. (Refer to...) Figure 1 The tear strength clamp includes a clamping base plate 1, a clamping top plate 2, and a nail rod 3. The clamping base plate 1 and the clamping top plate 2 are arranged in pairs, with a clamping gap 101 between them for placing the waterproof membrane. There are two sets of clamping base plates 1 and clamping top plates 2, each clamping both ends of the waterproof membrane.

[0031] Reference Figure 1 and 2The clamping base plate 1 is L-shaped, which helps to stably clamp materials within a limited space. Two circular first sliding holes 102 are formed through the clamping base plate 1 for the limit bolts 12 to pass through. Two elliptical sliding holes 103 are also formed through the clamping base plate 1, paired at the L-shaped protruding end. These elliptical sliding holes 103 allow the adjusting bolts 11 to pass through and move within them, better accommodating materials of different sizes. A first nail hole 301 is formed through the surface of the clamping base plate 1, and a clamping top plate 2 is formed through... A second nail hole 302 is provided, which is positioned opposite to the first nail hole 301. The nail rod 3 passes sequentially through the first nail hole 301, the clamping gap 101, and the second nail hole 302. The waterproof membrane positioned in the clamping gap 101 can be fixed using the nail rod 3, making it more stable when pulled and facilitating more accurate measurements. An observation grid 21 is provided on the clamping top plate 2. The observation grid 21 allows the operator to easily observe the position of the waterproof membrane in the clamping gap 101, enabling the nail rod 3 to accurately fix the waterproof membrane in the area to be tested, thereby improving the accuracy of the tear strength test.

[0032] Reference Figure 2 and Figure 3The clamping top plate 2 has two second sliding holes 201 extending through its surface, each of which is adapted to two first sliding holes 102. The second sliding holes 201 engage with the first sliding holes 102, allowing the limiting bolt 12 to pass sequentially through the first sliding hole 102, the clamping gap 101, and the second sliding hole 201. The other end of the limiting bolt 12 is threadedly connected to a limiting nut 13, and the connection between the clamping top plate 2 and the clamping bottom plate 1 is achieved through the threaded engagement of the limiting bolt 12 and the limiting nut 13. The clamping top plate 2 has two adjusting screw holes 202, which are positioned opposite to two elliptical sliding holes 103. The clamping bottom plate 1 is connected to the clamping top plate 2 horizontally via adjusting bolts 11, which pass through the elliptical sliding holes 103 and are threaded into the adjusting screw holes 202. By rotating the adjusting bolt 11, the distance between the clamping top plate 2 and the clamping bottom plate 1 can be adjusted, allowing the clamping top plate 2 to slide along the length of the limiting bolt 12 and engage with the clamping bottom plate 1. This allows for adjustment of the clamping gap 101, facilitating tear strength testing of waterproof membranes of different thicknesses. The limiting nut 13 is typically a wing nut, which is convenient for manual operation, allowing for tightening or loosening without tools, thus improving ease of operation. A limiting spring 14 is provided between the clamping bottom plate 1 and the clamping top plate 2, with the limiting bolt 12 passing through it. When the limiting nut 13 is loosened, the clamping top plate 2 is subjected to the elastic force of the limiting spring 14, enabling it to quickly separate from the clamping bottom plate 1, thus achieving rapid assembly and disassembly of the clamping bottom plate 1 and the clamping top plate 2.

[0033] Reference Figure 4 The clamping base plate 1 has elastic sliding members 17 on both sides, and the tension frame 4 has sliding tracks 42 on both sides. The elastic sliding members 17 are adapted to the sliding tracks 42. The cooperation between the elastic sliding members 17 and the sliding tracks 42 allows the waterproof membrane to expand and contract in a fixed vertical plane, thereby improving the accuracy of the tear strength test. The elastic sliding members 17 have good bending properties and are equipped with springs, allowing them to be detachably fitted to the sliding tracks 42. The tension frames 4 are symmetrically arranged. The symmetrical arrangement of the tension frames 4 ensures that the tensile force on the material is evenly distributed during the test, improving the accuracy of the test results. It also ensures that the clamps on both sides are balanced in force, avoiding deviations in test results due to uneven force.

[0034] Reference Figure 5Two sets of clamping base plates 1 and clamping top plates 2 are mounted on the tension frame 4. The two sets of clamping base plates 1 are installed at the top and bottom of the tension frame 4. Each clamping base plate 1 has a connecting post 15 with a first connecting hole 104. Both the top and bottom of the tension frame 4 are equipped with electric telescopic cylinders 41, which are used to perform tear strength tests on the fixed waterproof membrane. Each electric telescopic cylinder 41 has a second connecting hole 401 and is sleeved onto the connecting post 15, with the first connecting hole 104 and the second connecting hole 401 coinciding. The clamping base plates 1 are connected to the electric telescopic cylinders 41 by connecting bolts 16. The cooperation of the connecting post 15 and the electric telescopic cylinders 41 achieves the connection between the clamping base plates 1 and the tension frame 4.

[0035] The implementation principle of a tear strength clamp according to an embodiment of this application is as follows: When a tear strength test is required on a waterproof membrane, both ends of the waterproof membrane can be respectively positioned in two clamping gaps 101. At this time, the clamping top plate 2 is limited by the limiting bolt 12 and the limiting nut 13. Since the adjusting bolt 11 is threaded into the adjusting screw hole 202, when the position of the adjusting bolt 11 is adjusted in the elliptical sliding hole 103, the clamping top plate 2 can be driven to slide along the length direction of the limiting bolt 12, thereby achieving the effect of adjusting the clamping gap 101. This effectively improves the convenience of adjusting the clamping gap 101, making it more convenient to fix the waterproof membrane. Then, the nail rod 3 is sequentially passed through the first nail hole 301, the adjusting gap, and the second nail hole 302 to fix the waterproof membrane. Then, the two clamping bottom plates 1 are set on the electric telescopic cylinder 41 through the connecting column 15, and the clamping bottom plates 1 are engaged in the sliding track 42 through the elastic sliding member 17. In this way, the tear strength test of the waterproof membrane can begin.

[0036] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A tear strength clamp, characterized in that: It includes a clamping base plate (1), a clamping top plate (2) and a nail rod (3). The clamping base plate (1) and the clamping top plate (2) are arranged in pairs. There are two sets of clamping base plates (1) and clamping top plates (2). The two sets of clamping base plates (1) and clamping top plates (2) are detachably installed on the top and bottom of the tension frame (4). The clamping base plate (1) is L-shaped. The clamping base plate (1) has several first sliding holes (102) and several elliptical sliding holes (103) through it. The elliptical sliding holes (103) are arranged in pairs at the L-shaped protruding ends of the clamping base plate (1). The clamping top plate (2) has several second sliding holes (201) through its surface, which are adapted to the first sliding holes (102). The clamping top plate (2) has several adjusting screw holes (202), which are aligned with the elliptical sliding holes (102). 3) The clamping base plate (1) is connected to the clamping top plate (2) in the horizontal direction by adjusting bolts (11). The adjusting bolts (11) pass through the elliptical sliding hole (103) and are threaded into the adjusting screw hole (202). The clamping base plate (1) is connected to the clamping top plate (2) by limiting bolts (12). The other end of the limiting bolts (12) is threaded into a limiting nut (13). A clamping gap (101) is provided between the clamping top plate (2) and the clamping base plate (1). The clamping top plate (2) slides along the length direction of the limiting bolts (12) and is fitted to the clamping base plate (1).

2. The tear strength clamp according to claim 1, characterized in that: The clamping base plate (1) has a first nail hole (301) through it, and the clamping top plate (2) has a second nail hole (302) through it. The second nail hole (302) is arranged opposite to the first nail hole (301). The nail rod (3) passes through the first nail hole (301), the clamping gap (101) and the second nail hole (302) in sequence.

3. The tear strength clamp according to claim 1, characterized in that: The clamping base plate (1) is provided with a connecting post (15), the connecting post (15) is provided with a first connecting hole (104), the top and bottom of the tension frame (4) are provided with electric telescopic cylinders (41), the electric telescopic cylinders (41) are provided with a second connecting hole (401), the electric telescopic cylinders (41) are sleeved on the connecting post (15), the first connecting hole (104) and the second connecting hole (401) are arranged to overlap, and the clamping base plate (1) is connected to the electric telescopic cylinders (41) by connecting bolts (16).

4. A tear strength clamp according to claim 1, characterized in that: The clamping top plate (2) is provided with an observation grid (21).

5. A tear strength clamp according to claim 1, characterized in that: The limiting nut (13) is a wing nut.

6. A tear strength clamp according to claim 1, characterized in that: A limiting spring (14) is provided between the clamping base plate (1) and the clamping top plate (2), and the limiting bolt (12) passes through the limiting spring (14).

7. A tear strength clamp according to claim 1, characterized in that: The clamping base plate (1) is provided with elastic sliding parts (17) on both sides, and the tension frame (4) is provided with sliding tracks (42) on both sides. The elastic sliding parts (17) are adapted to the sliding tracks (42).

8. A tear strength clamp according to claim 1, characterized in that: The tension frame (4) is arranged symmetrically.

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