Steel plastic grid stretching clamp

Abstract

The utility model relates to steel plastic grating technical field, the utility model provides a kind of steel plastic grating tensile fixture, including bottom plate, the top of bottom plate is equipped with movable plate, the both sides of movable plate are equipped with the fixed plate of symmetrical distribution, the top of one side of two the fixed plate mutually close is fixedly connected with mounting plate, the both sides of two the mounting plate mutually close are hingedly connected with the connecting rod of symmetrical distribution, and the other end of connecting rod is hingedly connected with movable plate, the below of mounting plate is equipped with the fixed clamping plate of fixed connection with fixed plate, the side of fixed clamping plate close to mounting plate is equipped with dynamic clamping plate, when tensile test, start air cylinder, the drive end of air cylinder drives movable plate to move down to make movable plate drive connecting rod rotate, connecting rod rotates and promotes fixed plate to move, make fixed plate drive slider move along slide groove, to make two fixtures exist the drive of moving towards the side of mutually far away, air cylinder gradually exerts pressure, realize the tensile test of steel plastic grating.

Description

Technical Field

[0001] This utility model relates to the field of steel-plastic grating technology, specifically to a steel-plastic grating stretching clamp. Background Technology

[0002] Steel-plastic geogrid, a new type of geosynthetic material made of high-strength steel wire and plastic materials such as polyethylene or polypropylene, has been widely used in key applications such as foundation reinforcement, slope protection, and pavement structure enhancement in highways, railways, water conservancy, and municipal engineering due to its excellent tensile strength, corrosion resistance, and aging resistance. In the production and application of steel-plastic geogrid, its tensile mechanical properties (such as tensile strength and elongation at break) are core indicators for evaluating whether the product quality meets engineering design requirements. Therefore, it is necessary to accurately test its performance through professional tensile testing. The tensile clamp, as the core component of the testing equipment, directly determines the accuracy and reliability of the test data through its clamping stability, tensile control precision, and ease of operation. Currently, most tensile clamps used for steel-plastic grating on the market adopt single-sided clamping or single-plate pressure clamping methods. Due to the smoothness of the steel-plastic grating surface and its composite structure, local stress concentration is prone to occur at the edges. During the tensile process, problems such as grating slippage, edge tearing, or deformation of the clamping parts often occur, leading to test interruption or distorted test data, which cannot truly reflect the actual tensile performance of the grating. Most tensile clamps achieve the tensile action through independent drive mechanisms on both sides, making it difficult to ensure that the clamps on both sides move synchronously during the tensile process. This can easily lead to uneven force on the grating and skewed tensile testing, thus affecting the repeatability and accuracy of the test results. At the same time, some clamps use manual adjustment or mechanical transmission tensile methods, which cannot achieve precise control of tensile speed and tensile force increment, making it difficult to adapt to test scenarios of steel-plastic grating with different specifications and performance requirements. Utility Model Content

[0003] To overcome the above-mentioned defects, the present invention provides a steel-plastic grid stretching clamp, which solves the technical problem of inconvenience in clamping from both sides in the prior art.

[0004] According to one aspect, at least one embodiment of the present invention provides a steel-plastic grating tensioning clamp, comprising a base plate, a movable plate above the base plate, and symmetrically distributed fixed plates on both sides of the movable plate. An mounting plate is fixedly connected to the top of one of the two fixed plates that are close to each other. A connecting rod is hinged to the side of the fixed plate near the movable plate, and the other end of the connecting rod is hinged to the movable plate. A fixed clamping plate is fixedly connected to the fixed plate below the mounting plate. A movable clamping plate is fixedly connected to the side of the fixed clamping plate near the mounting plate. Connecting columns are fixedly connected to both sides of the movable clamping plate, and the connecting columns are slidably connected to the fixed plates. A stud is rotatably connected to the top of the mounting plate, and a U-shaped frame is threadedly connected to the outer wall of the stud. The outer wall of one end of the connecting column extending out of the fixed plate is fixedly connected to the U-shaped frame.

[0005] For example, in at least one embodiment of the present invention, a steel-plastic grating tensioning fixture is provided, which further includes: a fixing frame fixedly connected to the top of the base plate, the fixing frame being located between two U-shaped frames, and the inner wall of the fixing frame being slidably connected to the movable plate.

[0006] For example, in at least one embodiment of the present invention, a steel-plastic grid stretching clamp is provided, which further includes: a through groove is provided on the fixing plate, and the inner wall of the through groove is slidably connected to the connecting column.

[0007] For example, in at least one embodiment of the present invention, a steel-plastic grid stretching clamp is provided, which further includes: symmetrically distributed guide strips fixedly connected to the inner wall of the through groove, symmetrically distributed guide grooves opened on both sides of the connecting column, and the inner wall of the guide groove slidably connected to the guide strips.

[0008] For example, in at least one embodiment of the present invention, a steel-plastic grating tensioning fixture is provided, which further includes: a motor fixedly connected to the bottom of the mounting plate, the output shaft of the motor fixedly connected to a stud, and a limit block fixedly connected to one end of the stud extending out of the top of the U-shaped frame.

[0009] For example, in at least one embodiment of the present invention, a steel-plastic grid stretching clamp is provided, which further includes: a slider is fixedly connected to the bottom of the fixing plate, and symmetrically distributed sliding grooves are provided on both sides of the top of the bottom plate, and the inner wall of the sliding groove is slidably connected to the slider.

[0010] For example, in at least one embodiment of the present invention, a steel-plastic grating tensioning fixture is provided, which further includes: a cylinder fixedly connected to the top of the fixing frame, and the driving end of the cylinder fixedly connected to the movable plate.

[0011] For example, in at least one embodiment of the present invention, a steel-plastic grid stretching clamp is provided, which further includes: grooves are provided on both sides of the inner wall of the fixing frame, and a movable block is slidably connected to the inner wall of the groove, and the movable block is fixedly connected to the movable plate.

[0012] For example, in at least one embodiment of the present invention, a steel-plastic grid stretching clamp is provided, which further includes: a second mounting groove is provided at the end of the connecting rod away from the movable plate, a second pin is fixedly connected to the inner wall of the second mounting groove, and the outer wall of the second pin is rotatably connected to the fixed plate.

[0013] For example, in at least one embodiment of the present invention, a steel-plastic grid stretching clamp is provided, which further includes: symmetrically distributed first mounting grooves on both sides of the movable plate, a first pin fixedly connected to the inner wall of the first mounting groove, and the outer wall of the first pin rotatably connected to the connecting rod.

[0014] The beneficial effects of this utility model are as follows: 1. In this utility model, when clamping, the two sides of the steel-plastic grid are placed on the top of the two fixed clamping plates respectively. The motor is started, and the output shaft of the motor rotates, which drives the stud to rotate, thereby causing the U-shaped frame to move down. The U-shaped frame moves down, which drives the connecting column to move. The two connecting columns move down at the same time through the U-shaped frame, thereby causing the moving clamping plate to move down to clamp and fix the steel-plastic grid, which is convenient for clamping. 2. In this utility model, during the tensile test, the cylinder is started, and the driving end of the cylinder drives the movable plate to move down, which in turn causes the movable plate to drive the connecting rod to rotate. The rotation of the connecting rod pushes the fixed plate to move, which causes the fixed plate to drive the slider to move along the slide groove. This causes the two clamps to move towards the side that is far away from each other. The cylinder gradually applies pressure to realize the tensile test of the steel-plastic grid. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a steel-plastic grid stretching clamp in one embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the U-shaped frame installation in the embodiment; Figure 3 for Figure 1 A schematic diagram of guide bar installation in the embodiment; Figure 4 for Figure 1 A schematic diagram of the movable plate installation in the embodiment; Figure 5 for Figure 1 The embodiment shows a schematic diagram of the connecting rod installation.

[0017] In the diagram: 1. Base plate; 2. Fixed plate; 3. Fixed clamping plate; 4. Moving clamping plate; 5. Connecting column; 6. U-shaped frame; 7. Stud; 8. Fixed frame; 9. Cylinder; 10. Movable plate; 11. Connecting rod; 12. Slide groove; 13. Mounting plate; 14. Slide block; 15. Through groove; 16. Guide strip; 17. Guide groove; 18. Limiting block; 19. Groove; 20. Movable block; 21. First mounting groove; 22. First pin; 23. Second mounting groove; 24. Second pin; 25. Motor. Detailed Implementation The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0018] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-5 As shown, this invention illustrates a steel-plastic grating tensioning clamp according to one embodiment of the present invention. It includes a base plate 1, a movable plate 10 above the base plate 1, and symmetrically distributed fixed plates 2 on both sides of the movable plate 10. A mounting plate 13 is fixedly connected to the top of the side of the two fixed plates 2 closest to each other. A connecting rod 11 is hinged to the side of the fixed plate 2 closest to the movable plate 10, and the other end of the connecting rod 11 is hinged to the movable plate 10. A fixed clamping plate 3, fixedly connected to the fixed plate 2, is located below the mounting plate 13. A movable clamping plate 4 is located on the side of the fixed clamping plate 3 closest to the mounting plate 13. The movable clamping plate 4 has two sides... All are fixedly connected with connecting columns 5, and the connecting columns 5 are slidably connected to the fixed plate 2. The top of the mounting plate 13 is rotatably connected with studs 7, and the outer wall of the studs 7 is threadedly connected with a U-shaped frame 6. The outer wall of the connecting column 5 extending out of the fixed plate 2 is fixedly connected to the U-shaped frame 6. The moving plate 10 drives the connecting rod 11 to rotate, thereby causing the mounting plate 13 to move, so that the distance between the two clamps changes, thereby realizing the tensile test of the steel-plastic grid. The rotation of the studs 7 drives the U-shaped frame 6 to move down, thereby causing the connecting column 5 to drive the moving clamp 4 to move, so that the moving clamp 4 and the fixed clamp 3 clamp the steel-plastic grid.

[0024] The clamping surfaces of the fixed clamping plate 3 and the movable clamping plate 4 are made of 65Mn steel with a surface roughness of Ra1.6μm. The clamping surfaces are 200mm long and 50mm wide. In actual use, a 3mm thick nitrile rubber anti-slip layer is pasted on the inner side of the movable clamping plate 4 to improve the clamping friction.

[0025] In some examples, a fixing frame 8 is fixedly connected to the top of the base plate 1. The fixing frame 8 is located between two U-shaped frames 6, and the inner wall of the fixing frame 8 is slidably connected to the movable plate 10.

[0026] In some examples, the fixed plate 2 has a through groove 15, the inner wall of the through groove 15 is slidably connected to the connecting column 5, and the through groove 15 guides the up and down movement of the connecting column 5.

[0027] In some examples, the inner wall of the through groove 15 is fixedly connected with symmetrically distributed guide bars 16, and symmetrically distributed guide grooves 17 are opened on both sides of the connecting column 5. The inner wall of the guide groove 17 is slidably connected with the guide bar 16, and the movement of the connecting column 5 is further guided by the guide groove 17 and the guide bar 16.

[0028] In some examples, a motor 25 is fixedly connected to the bottom of the mounting plate 13. The output shaft of the motor 25 is fixedly connected to the stud 7. One end of the stud 7 extending out of the top of the U-shaped frame 6 is fixedly connected to a limit block 18. The motor 25 drives the stud 7 to rotate, thereby causing the U-shaped frame 6 to move up and down.

[0029] In some examples, the bottom of the fixed plate 2 is fixedly connected to the slider 14, and the top two sides of the base plate 1 are provided with symmetrically distributed sliding grooves 12, and the inner wall of the sliding groove 12 is slidably connected to the slider 14.

[0030] The clearance between the slider 14 and the slide groove 12 is H7 / f6. High-precision assembly ensures the synchronous movement of the two fixed plates 2, with a synchronization error of ≤0.5mm / m, thus avoiding the skew and stretching of the steel-plastic grid.

[0031] In some examples, a cylinder 9 is fixedly connected to the top of the fixed frame 8. The drive end of the cylinder 9 is fixedly connected to the movable plate 10. The cylinder 9 is a standard cylinder of model SC63×200 with an output pressure range of 0.4-0.8MPa and a stroke of 200mm. It is suitable for steel-plastic grating with a tensile strength ≤50kN / m. The movable plate 10 is moved by the cylinder 9 to carry out the tensile test.

[0032] In some examples, grooves 19 are provided on both inner walls of the fixed frame 8. Movable blocks 20 are slidably connected to the inner walls of the grooves 19, and the movable blocks 20 are fixedly connected to the movable plate 10. The movement of the movable plate 10 is guided by the grooves 19 and the movable blocks 20.

[0033] In some examples, the end of the connecting rod 11 away from the movable plate 10 is provided with a second mounting groove 23. The inner wall of the second mounting groove 23 is fixedly connected to a second pin 24, and the outer wall of the second pin 24 is rotatably connected to the fixed plate 2. The second pin 24 facilitates the hinge connection between the connecting rod 11 and the fixed plate 2.

[0034] In some examples, the movable plate 10 has symmetrically distributed first mounting grooves 21 on both sides. The inner wall of the first mounting groove 21 is fixedly connected to a first pin 22, and the outer wall of the first pin 22 is rotatably connected to the connecting rod 11. The first pin 22 facilitates the hinge connection between the connecting rod 11 and the movable plate 10.

[0035] The symmetry error of the first mounting groove 21 on both sides of the movable plate 10 is ≤0.05mm. The connecting rod 11 is integrally formed from 45# steel, and the length deviation of the rod on both sides is ≤0.1mm.

[0036] Working principle and usage process of this utility model: In this application, during clamping, the two sides of the steel-plastic grid are placed on top of the two fixed clamping plates 3 respectively. The motor 25 is started, and the output shaft of the motor 25 rotates, which drives the stud 7 to rotate, thereby causing the U-shaped frame 6 to move down. The U-shaped frame 6 moves down, which drives the connecting column 5 to move. The two connecting columns 5 move down at the same time through the U-shaped frame 6, thereby causing the moving clamping plate 4 to move down to clamp and fix the steel-plastic grid, which is convenient for clamping. In this application, during the tensile test, the cylinder 9 is activated. The drive end of the cylinder 9 drives the movable plate 10 to move down, which in turn causes the movable plate 10 to drive the connecting rod 11 to rotate. The rotation of the connecting rod 11 pushes the fixed plate 2 to move, which causes the fixed plate 2 to drive the slider 14 to move along the slide groove 12. This causes the two clamps to move towards the side that is far away from each other. The cylinder 9 gradually applies pressure to realize the tensile test of the steel-plastic grid. During the stretching process, the real-time tensile force value is collected by the pressure sensor built into the cylinder 9, and the elongation is collected by the displacement sensor (model KTF150) installed on the movable plate 10. The data is transmitted to the control system in real time to achieve accurate detection of tensile mechanical properties. The displacement sensor is not shown in the figure.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A steel-plastic grating tensioning clamp, comprising a base plate (1), characterized in that: A movable plate (10) is provided above the base plate (1). A fixed plate (2) is provided on both sides of the movable plate (10). An installation plate (13) is fixedly connected to the top of the two fixed plates (2) that are close to each other. A connecting rod (11) is hinged to the side of the fixed plate (2) that is close to the movable plate (10), and the other end of the connecting rod (11) is hinged to the movable plate (10). A fixed clamping plate (3) is provided below the installation plate (13) and is fixedly connected to the fixed plate (2). A movable clamping plate (4) is provided on the side of the fixed clamping plate (3) that is close to the installation plate (13). A connecting column (5) is fixedly connected to both sides of the movable clamping plate (4), and the connecting column (5) is slidably connected to the fixed plate (2). A stud (7) is rotatably connected to the top of the installation plate (13). A U-shaped frame (6) is threadedly connected to the outer wall of the stud (7). The outer wall of the end of the connecting column (5) that extends out of the fixed plate (2) is fixedly connected to the U-shaped frame (6).

2. The steel-plastic grating tensioning fixture according to claim 1, characterized in that: The top of the base plate (1) is fixedly connected to a fixing frame (8), which is located between two U-shaped frames (6). The inner wall of the fixing frame (8) is slidably connected to the movable plate (10).

3. The steel-plastic grating tensioning fixture according to claim 1, characterized in that: A through groove (15) is provided on the fixing plate (2), and the inner wall of the through groove (15) is slidably connected to the connecting column (5).

4. The steel-plastic grating tensioning fixture according to claim 3, characterized in that: The inner wall of the through groove (15) is fixedly connected with symmetrically distributed guide strips (16), and symmetrically distributed guide grooves (17) are opened on both sides of the connecting column (5). The inner wall of the guide groove (17) is slidably connected to the guide strips (16).

5. A steel-plastic grating tensioning fixture according to claim 1, characterized in that: A motor (25) is fixedly connected to the bottom of the mounting plate (13). The output shaft of the motor (25) is fixedly connected to the stud (7). One end of the stud (7) extending out of the top of the U-shaped frame (6) is fixedly connected to a limit block (18).

6. The steel-plastic grating tensioning fixture according to claim 1, characterized in that: The bottom of the fixed plate (2) is fixedly connected to a slider (14), and the top two sides of the base plate (1) are provided with symmetrically distributed sliding grooves (12), and the inner wall of the sliding groove (12) is slidably connected to the slider (14).

7. A steel-plastic grating tensioning fixture according to claim 2, characterized in that: A cylinder (9) is fixedly connected to the top of the fixed frame (8), and the driving end of the cylinder (9) is fixedly connected to the movable plate (10).

8. A steel-plastic grating tensioning fixture according to claim 2, characterized in that: The inner walls of both sides of the fixed frame (8) are provided with grooves (19), and the inner walls of the grooves (19) are slidably connected with movable blocks (20), and the movable blocks (20) are fixedly connected with the movable plate (10).

9. A steel-plastic grating tensioning fixture according to claim 1, characterized in that: The connecting rod (11) has a second mounting groove (23) at one end away from the movable plate (10). The inner wall of the second mounting groove (23) is fixedly connected to a second pin (24), and the outer wall of the second pin (24) is rotatably connected to the fixed plate (2).

10. A steel-plastic grating tensioning fixture according to claim 1, characterized in that: The movable plate (10) has symmetrically distributed first mounting grooves (21) on both sides. The inner wall of the first mounting groove (21) is fixedly connected to a first pin (22), and the outer wall of the first pin (22) is rotatably connected to the connecting rod (11).

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