Device for testing tearing strength of polymeric membrane material

Abstract

The utility model relates to strength testing equipment, belongs to the technical field of strength testing, and particularly relates to macromolecular membrane material tearing strength testing equipment which comprises a base, a mounting frame is fixedly mounted on the wall surface of the top end of the base, a two-way screw is rotatably mounted on the inner side wall of the mounting frame, and a motor is fixedly mounted on the wall surface of the top end of the mounting frame. The output end of the motor is fixedly connected with the bidirectional screw rod; the two movable plates are spirally mounted on the side wall of the two-way screw rod, fixing plates and mounting frames are fixedly mounted on the side walls of the two movable plates correspondingly, and pressing assemblies are arranged in the two mounting frames correspondingly; according to the utility model, the positioning plate firstly contacts with a sample to pre-press the sample, the state of the sample can be adjusted, so that the sample has the same form and tension in the initial test state, and then the handle is rotated to drive the connecting plate to move, so that the pressing plate tightly presses the sample, and the precision and effectiveness of the test result are ensured.

Description

Technical Field

[0001] This utility model relates to the field of strength testing technology, and in particular to a device for testing the tear strength of polymer membrane materials. Background Technology

[0002] Polymer membrane materials are semi-permeable membranes with selective permeability, made from organic polymers using membrane separation technology. These materials possess many excellent properties and have wide applications in various fields.

[0003] Chinese Patent CN218674523U discloses a POF shrink film tear strength testing device. Addressing existing problems, the patent proposes the following solution: It includes a base plate with a vertical plate fixedly mounted on its top. Two U-shaped plates are positioned above the base plate, facing each other. An L-shaped rod is fixedly mounted on the upper U-shaped plate. A base is fixedly mounted on the side of the vertical plate away from the U-shaped plate, and a shared electric telescopic rod is fixedly mounted between the base and the L-shaped rod. A clamping plate is slidably mounted on the U-shaped plate, and a cavity is formed inside the U-shaped plate. A movable hole is formed on the inner wall of the cavity near the vertical plate, and a curved rod is slidably mounted on the inner wall of the cavity. This patent overcomes the shortcomings of existing technologies, enabling the fixing and tear strength testing of POF shrink film with greater accuracy, thus meeting current needs.

[0004] The above technical solution controls the movement of the crank rod in the cavity, causing the support rod to deflect. The clamping plate moves to the position to fix the shrink film under the squeezing of the support rod, and then the bolt is turned to make it enter the corresponding height limiting groove. However, since the shape and tension of the membrane sample cannot be guaranteed when it is clamped and fixed, if the membrane sample is not straightened before the test, additional bending or twisting may occur during the test, which will interfere with the accuracy of the test data. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model proposes a tear strength testing device for polymer membrane materials. The positioning plate first contacts the sample and pre-presses it, allowing the sample's state to be adjusted so that the sample has the same shape and tension in the initial test state. Then, the handle is rotated to move the connecting plate, causing the pressure plate to press the sample tightly, ensuring the accuracy and validity of the test results.

[0006] The technical solution to achieve the purpose of this utility model is as follows: a polymer membrane material tear strength testing device, including a base, a mounting frame fixedly installed on the top wall of the base, a bidirectional screw rotatably installed on the inner side wall of the mounting frame, a motor fixedly installed on the top wall of the mounting frame, and the output end of the motor fixedly connected to the bidirectional screw, and further including;

[0007] Two movable plates are spirally mounted on the sidewall of a bidirectional screw. A fixed plate and a mounting frame are fixedly mounted on the sidewall of each movable plate. A clamping assembly is provided inside each mounting frame. The clamping assembly includes a connecting plate, which is slidably mounted on the inner sidewall of the mounting frame. A threaded rod is rotatably mounted on the sidewall of the connecting plate, spirally mounted on the sidewall of the mounting frame. A handle is fixedly mounted on the sidewall of the threaded rod. A pressure plate is fixedly mounted on the sidewall of the connecting plate, and a spring is fixedly mounted on the sidewall of the connecting plate. A positioning plate is fixedly mounted at the other end of the spring. The distance from the positioning plate to the fixed plate is less than the distance from the pressure plate to the fixed plate.

[0008] In some embodiments, the two clamping components are axially symmetrical about the center of the bidirectional screw.

[0009] In some embodiments, the sidewalls of the mounting bracket are provided with scale strips.

[0010] In some embodiments, a guide rod is fixedly installed on the side wall of the positioning plate, the guide rod is located inside the spring, and the guide rod passes through the connecting plate.

[0011] In some embodiments, a limiting plate is fixedly mounted on the side wall of the guide rod.

[0012] Compared with the prior art, the significant advantages of this utility model are:

[0013] In this invention, the sample is placed inside the fixed plate, and then the handle is held to rotate the threaded rod. The rotation of the threaded rod causes the connecting plate to move towards the fixed plate. During the movement of the connecting plate, the positioning plate will first contact the sample and apply a pre-compression to the sample. This can adjust the state of the sample and straighten it, so that the samples have the same shape and tension in the initial state during testing, thereby eliminating test errors caused by inconsistent sample shapes. Afterwards, rotating the handle will drive the connecting plate to continue moving, so that the pressure plate will press the sample tightly and ensure the accuracy and validity of the test results. Attached Figure Description

[0014] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 yes Figure 1 Enlarged view of point A;

[0017] Figure 3 This is a schematic diagram of the internal structure of the mounting frame of this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Base; 2. Mounting bracket; 3. Motor; 31. Double-acting screw; 32. Moving plate; 4. Mounting frame; 5. Fixing plate; 6. Connecting plate; 61. Threaded rod; 62. Handle; 7. Pressure plate; 8. Positioning plate; 81. Guide rod; 811. Limiting plate; 82. Spring; 9. Scale strip. Detailed Implementation

[0020] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. 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 protection scope of the present invention.

[0021] This utility model provides an improved tear strength testing device for polymer membrane materials. The technical solution of this utility model is as follows:

[0022] like Figure 1 - Figure 3As shown, a tear strength testing device for polymer membrane materials includes a base 1, a mounting frame 2 fixedly mounted on the top wall of the base 1, a bidirectional screw 31 rotatably mounted on the inner side wall of the mounting frame 2, a motor 3 fixedly mounted on the top wall of the mounting frame 2, and the output end of the motor 3 fixedly connected to the bidirectional screw 31. It also includes two movable plates 32; the two movable plates 32 are spirally mounted on the side wall of the bidirectional screw 31 and slidably mounted on the inner side wall of the mounting frame 2. A fixing plate 5 and a mounting frame 4 are fixedly mounted on the side wall of each of the two movable plates 32. The interior of the two mounting frames 4... Both are equipped with clamping components. The two clamping components are symmetrically distributed about the center of the bidirectional screw 31. The clamping components include a connecting plate 6, which is slidably mounted on the inner side wall of the mounting frame 4. A threaded rod 61 is rotatably mounted on the side wall of the connecting plate 6. The threaded rod 61 is helically mounted on the side wall of the mounting frame 4. A handle 62 is fixedly mounted on the side wall of the threaded rod 61, and the handle 62 is located outside the mounting frame 4. A pressure plate 7 is fixedly mounted on the side wall of the connecting plate 6. A spring 82 is fixedly mounted on the side wall of the connecting plate 6. A positioning plate 8 is fixedly mounted on the other end of the spring 82. The positioning plate 8 is connected to the connecting plate 6 via a spring 82. A guide rod 81 is fixedly installed on the side wall of the positioning plate 8, inside the spring 82, and passing through the connecting plate 6. The guide rod 81 prevents the spring 82 from deforming over time. A limit plate 811 is fixedly installed on the side wall of the guide rod 81 to limit its movement. The distance from the positioning plate 8 to the fixed plate 5 is less than the distance from the pressure plate 7 to the fixed plate 5. A scale strip 9 is provided on the side wall of the mounting bracket 2 for easy observation and recording. The sample is placed on the fixed plate. Inside the fixed plate 5, hold the handle 62 to drive the threaded rod 61 to rotate. The rotation of the threaded rod 61 drives the connecting plate 6 to move towards the fixed plate 5. During the movement of the connecting plate 6, the positioning plate 8 will first contact the sample and pre-press the sample. This can adjust the state of the sample and straighten it, so that the sample has the same shape and tension in the initial state during the test, thereby eliminating the test error caused by the different shapes of the samples. Then, turn the handle 62 to drive the connecting plate 6 to continue moving, so that the pressure plate 7 presses the sample tightly and ensures the accuracy and validity of the test results.

[0023] The specific working method is as follows: Place the sample inside the fixed plate 5, then hold the handle 62 to drive the threaded rod 61 to rotate. The rotation of the threaded rod 61 drives the connecting plate 6 to move towards the fixed plate 5. During the movement of the connecting plate 6, the positioning plate 8 will first contact the sample and apply a pre-compression to the sample. This can adjust the state of the sample and straighten it, so that the sample has the same shape and tension in the initial state during the test, thereby eliminating the test error caused by the different shapes of the samples. Then, rotate the handle 62 to drive the connecting plate 6 to continue moving, so that the pressure plate 7 presses the sample tightly, eliminating interference factors in the test process. Then, start the motor 3. The motor 3 drives the bidirectional screw 31 to rotate. The rotation of the bidirectional screw 31 drives the two moving plates 32 to move away from each other, achieving tearing of the sample. When the sample is broken, quickly record the reading of the scale bar 9 corresponding to the moving plate 32. This can test the strength of different samples, improve the test efficiency, and ensure the accuracy and validity of the test results.

[0024] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A tear strength testing device for polymer membrane materials, comprising a base (1), wherein a mounting frame (2) is fixedly mounted on the top wall of the base (1), a bidirectional screw (31) is rotatably mounted on the inner side wall of the mounting frame (2), and a motor (3) is fixedly mounted on the top wall of the mounting frame (2), the output end of the motor (3) being fixedly connected to the bidirectional screw (31), characterized in that: Also includes; Two movable plates (32) are spirally mounted on the side wall of a bidirectional screw (31). A fixed plate (5) and a mounting frame (4) are fixedly mounted on the side wall of each movable plate (32). A clamping assembly is provided inside each mounting frame (4). The clamping assembly includes a connecting plate (6). The connecting plate (6) is slidably mounted on the inner side wall of the mounting frame (4). A threaded rod (61) is rotatably mounted on the side wall of the connecting plate (6). The threaded rod (61) is spirally mounted on the side wall of the mounting frame (4). A handle (62) is fixedly mounted on the side wall of the threaded rod (61). A pressure plate (7) is fixedly mounted on the side wall of the connecting plate (6). A spring (82) is fixedly mounted on the side wall of the connecting plate (6). A positioning plate (8) is fixedly mounted on the other end of the spring (82). The distance from the positioning plate (8) to the fixed plate (5) is less than the distance from the pressure plate (7) to the fixed plate (5).

2. The tear strength testing device for polymer membrane materials according to claim 1, characterized in that: The two clamping components are axially symmetrical about the center of the bidirectional screw (31) with respect to the center of symmetry.

3. The tear strength testing device for polymer membrane materials according to claim 1, characterized in that: The mounting bracket (2) has a scale strip (9) on its side wall.

4. The tear strength testing device for polymer membrane materials according to claim 1, characterized in that: A guide rod (81) is fixedly installed on the side wall of the positioning plate (8). The guide rod (81) is located inside the spring (82) and passes through the connecting plate (6).

5. The tear strength testing device for polymer membrane materials according to claim 4, characterized in that: A limiting plate (811) is fixedly installed on the side wall of the guide rod (81).

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