A blanket tensile testing device

Abstract

The present invention relates to a blanket tensile test device, comprising a workbench, a support frame, an upper base, an upper clamping module, a lower movable seat, a lower clamping module, a detection module, and a linkage module. The present invention clamps the upper end of the blanket sample in an active manner and the lower end of the blanket sample in a fixed manner, then stretches the sample to tighten it to a length to be detected, and detects the sample in the tightened state. Only when the sample is in a vertically tightened state and not over-stretched, the upper end of the blanket sample is transformed from an active clamping state to a fixed clamping state through a linkage action, and then the detection work can be carried out to obtain the tensile resistance data of the blanket. If the position of the sample is not correct, the subsequent action cannot be triggered and it can only be re-clamped, ensuring that the position state and length parameters of the sample are in a suitable state before the test work is carried out, reducing the generation of invalid data and improving the accuracy of the test results.

Description

Technical Field

[0001] The invention relates to the technical field related to textile testing, and in particular to a blanket tensile strength testing device. Background Art

[0002] Fabric tensile strength test technology is an important means to evaluate the tensile properties of fabrics. It selects fabric samples of specified specifications, observes and records the deformation and breaking behavior of the samples under stress, so as to determine the strength and ductility of the fabric material under stress. In the textile industry, fabric tensile strength test technology can be used to evaluate the quality and performance of fabrics and guide the improvement of product design and production processes. At the same time, it can also be used for fabric quality control and product certification to improve product competitiveness.

[0003] In the existing fabric tensile strength test process, such as the Chinese patent with announcement number CN117147325B, a textile tensile strength test device is disclosed, including an L-shaped seat, a first side plate and a second side plate, the first side plate is slidably arranged on the top of the horizontal side of the L-shaped seat, and the second side plate is vertically fixedly arranged on the top of the horizontal side of the L-shaped seat, the first side plate and the second side plate are opposite to each other. The side plates are provided with strip boxes, and each strip box is provided with a first textile clamping mechanism, and a connecting plate is horizontally arranged under each strip box, and the top of the connecting plate and the bottom of the corresponding strip box are respectively fixedly installed with a second copper plate and a first copper plate arranged in an offset manner, and both ends of the top of the connecting plate are vertically fixedly installed with a first spring rod.

[0004] In the above-mentioned prior art, the relative movement distance between the first clamping plate and the textile is mainly detected to avoid errors. However, the above-mentioned prior art does not take into account that during the clamping process of the textile, the manual clamping of the fabric is not precise, and there may be a certain deviation between the upper and lower ends of the textile. At this time, there will be errors in the length of the textile between the clamps, which will lead to inaccurate conclusions. On the other hand, when testing the fabric, it should be ensured that the fabric is in a vertically taut state in the initial state, otherwise the length of the fabric between the clamps will also be erroneous, which will increase the error of the final detection result.

[0005] Based on this, there is still room for improvement in the above-mentioned prior art. Summary of the invention

[0006] In order to ensure that the felt sample is in a vertically taut state for stretching during the tensile test, and that the length of the felt sample used for the test is kept within a specified range, the present application provides a felt tensile test device.

[0007] The present application provides a blanket tensile testing device that adopts the following technical solution:

[0008] A blanket tensile testing device comprises a workbench, a support frame, an upper base, an upper clamping module, a lower moving seat, a lower clamping module, a detection module and a linkage module. A U-shaped support frame is installed on the upper end of the workbench, the upper base is installed on the top of the support frame, an upper clamping module for movably clamping the upper end of the sample is arranged on the upper base, the lower moving seat is arranged on the support frame for sliding up and down by an electric slider, the lower clamping module is arranged on the lower moving seat, the lower clamping module fixes and clamps the lower end of the sample, the upper clamping module and the lower clamping module cooperate to correct the position of the sample, the detection module is arranged on the workbench, the detection module detects the sample clamped between the upper clamping module and the lower clamping module to ensure that the length and position parameters of the sample are within the qualified range, the linkage modules are symmetrically arranged on both sides of the support frame, and after the detection module detects that the parameters of the sample are qualified, the linkage module triggers the upper clamping module to switch to stable clamping.

[0009] Preferably, the upper clamping module includes an upper clamping base, a closing screw, an upper clamping piece, a rotating clamping piece, a rotation-stopping mechanism, and a closing mechanism. The upper clamping base is slidably arranged at the bottom of the upper base, and the upper clamping base and the upper base are matched by the closing screw. Turning the closing screw can make the upper clamping base close, so that the upper clamping piece clamps the sample. The upper clamping piece is rotatably arranged on the upper clamping base, and a resistance-increasing layer is provided on the surface of the upper clamping piece. The resistance-increasing layer increases friction and is convenient for the upper clamping piece to firmly clamp the sample. A spring 1 is connected between the upper clamping piece and the upper clamping base. The spring 1 is a torque spring. The springs together maintain the state of the upper clamping piece and reset it. The clamping parts are respectively rotatably arranged at the left and right ends of the upper clamping part through a pin shaft. A second spring is connected between the rotating clamping part and the upper clamping part. The second spring plays a role in maintaining the state of the rotating clamping part and resetting it. A certain angle is formed between the rotating clamping part and the upper clamping part in the initial state. At this time, the rotating clamping part cannot clamp the blanket sample. Only when the rotating clamping part is rotated to be flush with the upper clamping part can the rotating clamping part clamp the sample. A rough layer is arranged on the surface of the rotating clamping part. The rough layer plays a role in increasing the resistance, thereby ensuring that the rotating clamping part stably clamps the sample. The rotating clamping part and the upper clamping part are coordinated through a rotation-stopping mechanism, and the closing mechanism is arranged on the upper base.

[0010] Preferably, the anti-rotation mechanism includes a anti-rotation member, an extrusion member, and a traction rope. The anti-rotation member is arranged on the upper clamping member for sliding up and down. A brake layer is arranged on the surface of the anti-rotation member. The brake layer serves to increase friction, thereby causing frictional stop between the anti-rotation member and the upper clamping base. A spring three is connected between the anti-rotation member and the upper clamping member. The spring three serves to reset. The extrusion member is arranged in the upper clamping member for sliding left and right. The extrusion member and the anti-rotation member are extrusion-fitted. In the initial state, there is no contact between the anti-rotation member and the upper clamping base. After the extrusion member moves, the anti-rotation member is squeezed to a position of frictional contact with the upper clamping base, thereby performing frictional stop. The extrusion member and the rotating clamping member are connected by a traction rope.

[0011] Preferably, the closing mechanism includes a mounting plate, a sliding frame, a closing piece, and a guide piece. The mounting plate is mounted on the bottom of the upper base, the sliding frame is slidably mounted on the mounting plate to the left and right, a closing piece is slidably mounted on the sliding frame to the front and back, a spring four is connected between the closing piece and the sliding frame, the spring four plays a resetting role, the guide piece is mounted on the mounting plate, the guide piece and the closing piece are in contact and extrusion fit, the guide piece is arranged at an angle, when the sliding frame slides outward, the closing piece and the guide piece are in contact and extrusion, and after being extruded, the closing piece slides and closes along the sliding frame, and the closed closing piece squeezes the rotating clamping piece to rotate and close, thereby stably clamping the sample.

[0012] Preferably, the lower clamping module includes a lower clamping seat 1, a lower clamping seat 2, a lower clamping piece, and a threaded piece. The lower clamping seat 1 is installed on the lower moving seat. The lower clamping seat 2 is slidably arranged at the upper end of the lower clamping seat 1. A spring 5 is connected between the lower clamping seat 2 and the lower clamping seat 1. The spring 5 plays a role in resetting and measuring the tightening. After the lower clamping piece clamps the lower end of the sample, the lower clamping piece continues to move downward to perform the tightening operation. When the spring force of the spring 5 is overcome and relative sliding occurs between the lower clamping seat 2 and the lower clamping seat 1, it indicates that the sample is Tighten (the relative sliding distance between the lower clamping seat two and the lower clamping seat one is small. After a short relative sliding, the positions between the two are relatively fixed again, which is convenient for subsequent tensile test). The lower clamping piece is set on the lower clamping seat two for sliding back and forth. A friction layer is set on the surface of the lower clamping piece. The friction layer increases the resistance so that the lower clamping piece can stably clamp the sample. The lower clamping piece and the lower clamping seat two are matched by a threaded piece. By twisting the threaded piece, the lower clamping piece can be closed to clamp the lower end of the sample.

[0013] Preferably, the detection module includes a pressure switch, an electric push rod, an ejection rod, an ejection plate, a movable frame, and a matching groove. The pressure switch is installed in the lower clamping seat one, and the pressure switch is in contact with the bottom of the lower clamping seat two. In the initial state, the lower clamping seat two and the pressure switch are in contact. At this time, the pressure switch is disconnected. When the lower clamping seat two and the lower clamping seat one slide relative to each other, the lower clamping seat two and the pressure switch are separated. At this time, the pressure switch is closed, and a connecting circuit is formed between the pressure switch, the electric push rod, and the power supply. The electric push rod is installed in a hidden cavity opened inside the lower clamping seat one, and a power supply is provided in the hidden cavity. The pressure switch, the electric push rod, and the power supply are electrically connected. The ejection rod is installed on the output end of the electric push rod, and a ejection plate is installed on the outer end of the ejection rod. The ejection plate is circular, and the diameter of the ejection plate is larger than the diameter of the ejection rod. The movable frame slides left and right on the workbench. A spring six is ​​connected between the movable frame and the workbench, and the spring six plays a resetting role. The movable frame is a rectangular plate-shaped structure, and a matching groove corresponding to the position of the ejection rod is provided on the movable frame.

[0014] Preferably, the gap of the matching groove is larger than the diameter of the ejection rod and smaller than the diameter of the ejection plate. When the ejection plate is located on the inner side of the movable frame and is pushed outward, since the diameter of the ejection plate is larger than the gap of the matching groove, the ejection plate can push the movable frame to move outward. Afterwards, the ejection plate moves downward, and the movable frame always keeps the state of being pushed outward. When the ejection plate is located on the outer side of the movable frame and is pushed outward, at this time, there is no contact between the movable frame and the ejection plate, so the movable frame does not move. Afterwards, the ejection plate moves downward. At this time, the ejection rod is inserted into the matching groove. Since the diameter of the ejection rod is smaller than the gap of the matching groove, the movable frame still does not move.

[0015] Preferably, the linkage module includes a linkage plate, a linkage rod 1, and a linkage rod 2. The linkage plate is slidable left and right on the support frame. A spring 7 is connected between the linkage plate and the support frame. The spring 7 plays a resetting role. The upper end of the linkage plate is connected to the sliding frame through the linkage rod 1. The linkage rod 2 is installed on the mobile frame. The linkage rod 2 and the linkage plate are in contact and extrusion fit.

[0016] In summary, the beneficial technical effects of this application are as follows:

[0017] The blanket tensile test device described in the present invention performs active clamping on the upper end of the blanket sample and fixed clamping on the lower end of the blanket sample, then stretches the sample to tighten it to a length to be tested, and tests the sample in the tightened state. Only when the sample is in a vertically tightened state and not over-stretched, the upper end of the blanket sample is converted from active clamping to fixed clamping through the linkage action, and then the test work can be carried out to obtain the tensile resistance data of the blanket. If the position of the sample is not correct, the subsequent action cannot be triggered and it can only be re-clamped, which ensures that the position and length parameters of the sample are in a suitable state before testing, thereby reducing the generation of invalid data and improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a cross-sectional view of the overall structure of the present invention;

[0020] Figure 3 The present invention Figure 2 A local enlarged view of point A;

[0021] Figure 4 It is a schematic diagram of the structure among the upper clamping base, the upper clamping member, the rotating clamping member and the anti-rotation mechanism of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure among the mounting plate, the sliding frame, the closing member and the guide member of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure between the mounting plate, the sliding frame, the closing member, and the guide member of the present invention (viewed from bottom to top);

[0024] Figure 7 It is a structural schematic diagram of the detection module of the present invention.

[0025] Explanation of the accompanying drawings: 1. workbench; 2. supporting frame; 3. upper base; 4. upper clamping module; 5. lower moving seat; 6. lower clamping module; 7. detection module; 8. linkage module; 41. upper clamping base; 42. closing screw; 43. upper clamping member; 44. rotating clamping member; 45. anti-rotation mechanism; 46. closing mechanism; 451. anti-rotation member; 452. extrusion member; 453. traction rope; 461. mounting plate; 462. sliding frame; 463. closing member; 464. guide member; 61. lower clamping seat one; 62. lower clamping seat two; 63. lower clamping member; 64. threaded member; 71. pressure switch; 72. electric push rod; 73. ejection rod; 74. ejection plate; 75. movable frame; 751. matching groove; 81. linkage plate; 82. linkage rod one; 83. linkage rod two. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-Figure 7 This application is described in further detail.

[0027] The embodiment of the present application discloses a blanket tensile test device, which clamps the blanket with one end movable and the other end fixed, and corrects the position of a sample by stretching and tightening it, ensuring that the sample is in a vertically tightened state. At the same time, the length of the clamped sample is detected to ensure that the position and length parameters of the sample are in appropriate states before testing, thereby improving the accuracy of the test results.

[0028] Reference Figure 1 As shown, a blanket tensile test device comprises a workbench 1, a support frame 2, an upper base 3, an upper clamping module 4, a lower moving seat 5, a lower clamping module 6, a detection module 7, and a linkage module 8. A U-shaped support frame 2 is installed at the upper end of the workbench 1, the upper base 3 is installed on the top of the support frame 2, and an upper clamping module 4 for movably clamping the upper end of the sample is arranged on the upper base 3. The lower moving seat 5 is arranged on the support frame 2 to slide up and down through an electric slider, and the lower clamping module 6 is arranged on the lower moving seat 5. The lower clamping module 6 fixes and clamps the lower end of the sample, and the upper clamping module 4 and the lower clamping module 6 cooperate to correct the position of the sample. The detection module 7 is arranged on the workbench 1, and the detection module 7 detects the sample clamped between the upper clamping module 4 and the lower clamping module 6 to ensure that the length and position parameters of the sample are within the qualified range. The linkage module 8 is symmetrically arranged on both sides of the support frame 2. After the detection module 7 detects that the parameters of the sample are qualified, the linkage module 8 triggers the upper clamping module 4 to switch to stable clamping.

[0029] In the actual test process, a suitable blanket sample (usually in the shape of a long strip) is selected, and marks are drawn on the blanket sample with a marker. The distance between the marks is the detection length of the blanket. Afterwards, with the marks as a reference, one end of the sample is clamped on the upper clamping module 4, and the other end of the sample is clamped on the lower clamping module 6. Subsequently, the lower movable seat 5 drives the lower clamping module 6 to descend, and the lower movable seat 5 descends until the distance between the upper clamping module 4 and the lower clamping module 6 is equal to the length to be detected. At this time, the sample is tightened. At the same time, since the upper clamping module 4 is in a rotatable state, there are two situations. The first situation is: when the sample is clamped, there is no skew or the skew is small, then the upper clamping module 4 makes a rotation adjustment when pulling. At this time, the sample is pulled vertically while being tightened. The detection module 7 triggers the linkage module 8, so that the upper clamping module 4 switches to a stable clamping state. After that, the lower moving seat 5 continues to descend to pull the sample until the sample is broken, thereby obtaining the tensile strength data of the sample. The second situation is: the sample is greatly skewed when clamped (this situation is mostly caused by the error of the experimenter). At this time, the sample is stretched and tightened, but it cannot be adjusted to a vertical state. The detection module 7 cannot trigger the linkage module 8, and the equipment does not continue to work. At this time, the sample needs to be clamped again. This application appropriately stretches and tightens the sample to make the sample in a more natural vertical stretching and tightening state, and detects the length and position of the sample. Only when it is guaranteed to meet the standards, the test work is carried out, thereby reducing the generation of invalid data.

[0030] Reference Figure 3 , Figure 4As shown, the present application is provided with an upper clamping module 4 to clamp the upper end of the sample, and the upper clamping module 4 includes an upper clamping base 41, a closing screw 42, an upper clamping piece 43, a rotating clamping piece 44, a rotation-stopping mechanism 45, and a closing mechanism 46. The upper clamping base 41 is slidably arranged at the bottom of the upper base 3, and the upper clamping base 41 and the upper base 3 are matched through the closing screw 42. Screwing the closing screw 42 can make the upper clamping base 41 close, so that the upper clamping piece 43 clamps the sample, and the upper clamping piece 43 is rotatably arranged on the upper clamping base 41. The surface of the upper clamping piece 43 is provided with a resistance-increasing layer, which increases friction and facilitates the upper clamping piece 43 to firmly clamp the sample. A spring 1 is connected between the upper clamping piece 43 and the upper clamping base 41. The spring 1 is a torque spring. The springs work together to maintain the upper clamping piece 4 3's state and reset function, the rotating clamping member 44 is respectively rotatably arranged at the left and right ends of the upper clamping member 43 through the pin shaft, and a spring 2 is connected between the rotating clamping member 44 and the upper clamping member 43, and the spring 2 plays a role in maintaining the state of the rotating clamping member 44 and resetting the state, and a certain angle is formed between the rotating clamping member 44 and the upper clamping member 43 in the initial state, at which time the rotating clamping member 44 cannot clamp the blanket sample, and only when the rotating clamping member 44 is rotated to be flush with the upper clamping member 43, the rotating clamping member 44 can clamp the sample, and a rough layer is arranged on the surface of the rotating clamping member 44, and the rough layer plays a role in increasing the resistance, thereby ensuring that the rotating clamping member 44 stably clamps the sample, and the rotating clamping member 44 and the upper clamping member 43 are matched through a rotation-stopping mechanism 45, and a closing mechanism 46 is arranged on the upper base 3.

[0031] In the actual process of clamping the upper end of the sample, the upper end of the sample is placed between the upper clamping members 43, and then the closing screw 42 is turned to close the upper clamping base 41, so that the upper clamping member 43 clamps the sample, but at this time the upper clamping member 43 is still in a rotatable state. As the sample is stretched, the upper clamping member 43 rotates to a certain extent so that the position of the sample is adjusted, so that the sample is in a vertically taut state. When the detection module 7 detects that the sample is qualified, the closing mechanism 46 causes the rotating clamping member 44 to rotate and close, thereby reinforcing the clamping of the sample. At the same time, the rotating and closing rotating clamping member 44 triggers the anti-rotation mechanism 45, the position of the upper clamping member 43 is fixed, and the sample is firmly clamped.

[0032] Reference Figure 4As shown, the present application is provided with a stop mechanism 45 to perform a stop and fix operation on the upper clamping member 43, the stop mechanism 45 includes a stop member 451, an extrusion member 452, and a traction rope 453, the stop member 451 is slidably arranged on the upper clamping member 43 up and down, and a brake layer is arranged on the surface of the stop member 451, the brake layer plays a role in increasing friction, so that the stop member 451 and the upper clamping base 41 are frictionally stopped, a spring three is connected between the stop member 451 and the upper clamping member 43, the spring three plays a reset role, the extrusion member 452 is slidably arranged in the upper clamping member 43 left and right, the extrusion member 452 and the stop member 451 are extrusion-fitted, the stop member 451 and the upper clamping base 41 are not in contact with each other in the initial state, after the extrusion member 452 moves, it squeezes the stop member 451 to a position of frictional contact with the upper clamping base 41, thereby performing friction stop, the extrusion member 452 and the rotating clamping member 44 are connected by a traction rope 453.

[0033] In the actual process of stopping rotation, the closing mechanism 46 pulls the extrusion member 452 to move outward through the traction rope 453, and the extrusion member 452 moving outward squeezes the stop member 451 to move outward in the up and down directions. Extrusion friction occurs between the stop member 451 moving outward and the upper clamping base 41, thereby making the upper clamping member 43 in a non-rotatable state.

[0034] Reference Figure 5 , Figure 6 As shown, the present application is provided with a closing mechanism 46 to adjust and close the rotating clamping member 44, and the closing mechanism 46 includes a mounting plate 461, a sliding frame 462, a closing member 463, and a guide member 464. The mounting plate 461 is mounted on the bottom of the upper base 3, and the sliding frame 462 is slidably arranged on the mounting plate 461 left and right. A closing member 463 is slidably arranged on the sliding frame 462 back and forth, and a spring four is connected between the closing member 463 and the sliding frame 462, and the spring four plays a reset role. The guide member 464 is mounted on the mounting plate 461, and the guide member 464 and the closing member 463 are in contact and extrusion fit. The guide member 464 is arranged obliquely. When the sliding frame 462 slides outward, the closing member 463 contacts and squeezes the guide member 464. After being squeezed, the closing member 463 slides and closes along the sliding frame 462. The closed closing member 463 squeezes the rotating clamping member 44 to rotate and close, thereby stably clamping the sample.

[0035] In the actual process of reinforcement clamping, after the linkage module 8 is triggered, the sliding frame 462 is pulled by the linkage module 8 to slide outward, the closing piece 463 and the guide piece 464 are in contact and squeezed, and the closing piece 463 is squeezed and slides along the sliding frame 462 to close. The closed closing piece 463 squeezes the rotating clamping piece 44 to rotate and close, and the rotating clamping piece 44 rotates to a state parallel to the angle of the upper clamping piece 43, thereby stably clamping the sample.

[0036] Reference Figure 7 As shown, the present application is provided with a lower clamping module 6 to clamp the lower end of the sample, and the lower clamping module 6 includes a lower clamping seat 1 61, a lower clamping seat 2 62, a lower clamping piece 63, and a threaded piece 64. The lower clamping seat 1 61 is installed on the lower moving seat 5, and the lower clamping seat 2 62 is slidably arranged at the upper end of the lower clamping seat 1 61. A spring 5 is connected between the lower clamping seat 2 62 and the lower clamping seat 1 61. The spring 5 plays a role in resetting and measuring the tightening. After the lower clamping piece 63 clamps the lower end of the sample, the lower clamping piece 63 continues to move downward to perform the tightening operation. When the spring force of the spring 5 is overcome, the lower clamping seat 2 62 and the lower clamping seat 1 61 are in a state of being moved downward. When relative sliding occurs between the lower clamping seat 2 62 and the lower clamping seat 1 61, it indicates that the sample is tightened (the relative sliding distance between the lower clamping seat 2 62 and the lower clamping seat 1 61 is small. After a short relative sliding occurs between the two, the positions between the two are relatively fixed again, which is convenient for subsequent tensile test). The lower clamping piece 63 is set on the lower clamping seat 2 62 for sliding back and forth. The surface of the lower clamping piece 63 is provided with a friction layer. The friction layer plays a role in increasing the resistance, so that the lower clamping piece 63 can stably clamp the sample. The lower clamping piece 63 and the lower clamping seat 2 62 are matched by a threaded piece 64. By twisting the threaded piece 64, the lower clamping piece 63 can be closed to clamp the lower end of the sample.

[0037] In the actual process of clamping the lower end of the sample, the lower end of the sample is placed between the lower clamping members 63, and the threaded member 64 is screwed so that the lower clamping member 63 clamps the sample. Then the lower movable seat 5 descends to stretch the sample. When the spring force of the spring five is overcome and relative sliding occurs between the lower clamping seat two 62 and the lower clamping seat one 61, it indicates that the sample is tightened.

[0038] Reference Figure 7As shown, the sample may not be vertical when being tightened. The present application is provided with a detection module 7 to detect the state of the sample. The detection module 7 includes a pressure switch 71, an electric push rod 72, an ejection rod 73, an ejection plate 74, a movable frame 75, and a matching groove 751. The pressure switch 71 is installed in the lower clamping seat 1 61. The pressure switch 71 is in contact with the bottom of the lower clamping seat 2 62. In the initial state, the lower clamping seat 2 62 and the pressure switch 71 are in contact. At this time, the pressure switch 71 is disconnected. After relative sliding occurs between the lower clamping seat 2 62 and the lower clamping seat 1 61, the lower clamping seat 2 62 and the pressure switch 71 are separated. At this time, the pressure switch 71 is closed. A connecting circuit is formed between the switch 71, the electric push rod 72 and the power supply. The electric push rod 72 is installed in a hidden cavity opened inside the lower clamping seat 61. The hidden cavity is provided with a power supply. The pressure switch 71, the electric push rod 72 and the power supply are electrically connected. The ejection rod 73 is installed on the output end of the electric push rod 72. An ejection plate 74 is installed on the outer end of the ejection rod 73. The ejection plate 74 is circular, and the diameter of the ejection plate 74 is larger than the diameter of the ejection rod 73. The movable frame 75 is slidably arranged on the workbench 1 left and right. A spring six is ​​connected between the movable frame 75 and the workbench 1. The spring six plays a resetting role. The movable frame 75 is a rectangular plate-shaped structure, and a matching groove 751 corresponding to the position of the ejection rod 73 is opened on the movable frame 75.

[0039] Reference Figure 7 As shown, the gap of the matching groove 751 is larger than the diameter of the ejection rod 73 and smaller than the diameter of the ejection plate 74. When the ejection plate 74 is located on the inner side of the movable frame 75 and is pushed outward, since the diameter of the ejection plate 74 is larger than the gap of the matching groove 751, the ejection plate 74 can push the movable frame 75 to move outward. Afterwards, the ejection plate 74 moves downward, and the movable frame 75 always remains in the state of being pushed outward. When the ejection plate 74 is located on the outer side of the movable frame 75 and is pushed outward, at this time, the movable frame 75 and the ejection plate 74 are not in contact, so the movable frame 75 does not move. Afterwards, the ejection plate 74 moves downward. At this time, the ejection rod 73 is inserted into the matching groove 751. Since the diameter of the ejection rod 73 is smaller than the gap of the matching groove 751, the movable frame 75 still does not move.

[0040] When the test piece 75 is in the upright position, the lower movable seat 5 is lowered to the position where the distance between the upper clamping module 4 and the lower clamping module 6 is equal to the length to be tested, relative sliding occurs between the lower clamping seat 2 62 and the lower clamping seat 1 61, and the lower clamping seat 2 62 is separated from the pressure switch 71. At this time, the pressure switch 71 is closed, and a connecting circuit is formed between the pressure switch 71, the electric push rod 72, and the power supply. The electric push rod 72 pushes the ejection plate 74 outward, the movable frame 75 is pushed outward, and the linkage module 8 is triggered. If the sample is skewed, when the lower movable seat 5 is lowered to the position where the distance between the upper clamping module 4 and the lower clamping module 6 is equal to the length to be tested, relative sliding occurs between the lower clamping seat 2 62 and the lower clamping seat 1 61. This indicates that the electric push rod 72 is triggered in advance, and the ejection plate 74 is pushed out in advance. At this time, the ejection plate 74 is located on the outside of the movable frame 75, and the ejection rod 73 is in the matching groove 751. The movable frame 75 does not move, so the linkage module 8 is not triggered.

[0041] Reference Figure 2 As shown, the present application is provided with a linkage module 8 to link the detection module 7 and the upper clamping module 4. The linkage module 8 includes a linkage plate 81, a linkage rod 1 82, and a linkage rod 2 83. The linkage plate 81 is slidably arranged on the support frame 2 left and right. A spring 7 is connected between the linkage plate 81 and the support frame 2. The spring 7 plays a resetting role. The upper end of the linkage plate 81 is connected to the sliding frame 462 through the linkage rod 1 82. The linkage rod 2 83 is installed on the moving frame 75. The linkage rod 2 83 and the linkage plate 81 are in contact and extrusion fit.

[0042] In the actual linkage process, when the mobile frame 75 is pushed outward, it indicates that the sample meets the standard. At this time, the mobile frame 75 moving outward squeezes the linkage plate 81 through the linkage rod 2 83, and the squeezed linkage plate 81 pulls the sliding frame 462 through the linkage rod 1 82, thereby triggering the upper clamping module 4.

[0043] The implementation principle of this embodiment is:

[0044] Step 1: Cut and select a suitable blanket sample and mark it with a marker;

[0045] Step 2: Using the mark as a reference, clamp one end of the sample on the upper clamping module 4 and the other end of the sample on the lower clamping module 6;

[0046] Step 3: The lower moving seat 5 drives the lower clamping module 6 to descend, and the lower moving seat 5 descends until the distance between the upper clamping module 4 and the lower clamping module 6 is equal to the length to be detected. At this time, there are two situations:

[0047] A. When the sample is not skewed or is slightly skewed during clamping, the upper clamping module 4 makes a rotation adjustment during pulling. At this time, the sample is pulled to a vertical state while being tightened. The detection module 7 triggers the linkage module 8, so that the upper clamping module 4 switches to a stable clamping state;

[0048] B. The sample is skewed when clamped. At this time, the sample is stretched and tightened, but it cannot be adjusted to a vertical state. The detection module 7 cannot trigger the linkage module 8, and the equipment does not continue to work. At this time, the sample needs to be clamped again;

[0049] Step 4: The lower moving seat 5 continues to descend to pull the sample until the sample is broken, thereby obtaining the tensile strength data of the sample.

[0050] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A blanket tensile testing device, characterized in that: include: A workbench (1) having a U-shaped support frame (2) mounted on its upper end; An upper base (3) is mounted on the top of the support frame (2), and an upper clamping module (4) for movably clamping the upper end of the sample is arranged on the upper base (3); A lower movable seat (5) is arranged on the supporting frame (2) to slide up and down via an electric slider; A lower clamping module (6) is arranged on the lower moving seat (5), the lower clamping module (6) is used to fix and clamp the lower end of the sample, and the upper clamping module (4) and the lower clamping module (6) cooperate to correct the position of the sample; A detection module (7) is arranged on the workbench (1), and the detection module (7) detects the sample clamped between the upper clamping module (4) and the lower clamping module (6) to ensure that the length and position parameters of the sample are within a qualified range; A linkage module (8) is symmetrically arranged on both sides of the support frame (2). After the detection module (7) detects that the parameters of the sample are qualified, the linkage module (8) triggers the upper clamping module (4) to switch to stable clamping; The upper clamping module (4) comprises: An upper clamping base (41) is slidably disposed at the bottom of the upper base (3), and the upper clamping base (41) and the upper base (3) are matched with each other via a closing screw (42); An upper clamping member (43) is rotatably arranged on the upper clamping base (41), a resistance-enhancing layer is arranged on the surface of the upper clamping member (43), a spring is connected between the upper clamping member (43) and the upper clamping base (41), and the number of the upper clamping members (43) is two; The rotating clamping member (44) is respectively rotatably arranged at the left and right ends of the upper clamping member (43) through a pin shaft. A second spring is connected between the rotating clamping member (44) and the upper clamping member (43). A rough layer is arranged on the surface of the rotating clamping member (44). The rotating clamping member (44) and the upper clamping member (43) are matched through a rotation-stopping mechanism (45). In the initial state, a certain angle is formed between the rotating clamping member (44) and the upper clamping member (43). At this time, the rotating clamping member (44) cannot clamp the blanket sample. Only when the rotating clamping member (44) rotates to be flush with the upper clamping member (43), the rotating clamping member (44) can clamp the sample. A closing mechanism (46) disposed on the upper base (3); The closing mechanism (46) comprises: A mounting plate (461) mounted on the bottom of the upper base (3); A sliding frame (462) is slidably arranged on the mounting plate (461) to the left and right, a closing member (463) is slidably arranged on the sliding frame (462) to the front and rear, and a spring (4) is connected between the closing member (463) and the sliding frame (462); A guide member (464) is mounted on the mounting plate (461), the guide member (464) and the closing member (463) are in contact and extrusion fit, and the guide member (464) is arranged obliquely; In the process of clamping the upper end of the sample, the upper end of the sample is placed between the upper clamping members (43), and then the closing screw (42) is turned to close the upper clamping base (41), so that the upper clamping member (43) clamps the sample. However, at this time, the upper clamping member (43) is still in a rotatable state. As the sample is stretched, the upper clamping member (43) rotates to a certain extent so that the position of the sample is adjusted, so that the sample is in a vertically taut state. When the detection module (7) detects that the sample is qualified, the closing mechanism (46) causes the rotating clamping member (44) to rotate and close, thereby reinforcing the clamping of the sample. At the same time, the rotating and closing rotating clamping member (44) triggers the anti-rotation mechanism (45), the position of the upper clamping member (43) is fixed, and the sample is stably clamped. During the stable clamping process, after the linkage module (8) is triggered, the sliding frame (462) is pulled by the linkage module (8) to slide outward, the closing member (463) and the guide member (464) are in contact and squeezed, and the closing member (463) is squeezed and slides along the sliding frame (462) to close, and the closed closing member (463) squeezes the rotating clamping member (44) to rotate and close, and the rotating clamping member (44) rotates to a state parallel to the upper clamping member (43), thereby stably clamping the sample; The lower clamping module (6) comprises: A lower clamping seat (61) mounted on the lower moving seat (5); The lower clamping seat 2 (62) is slidably arranged on the upper end of the lower clamping seat 1 (61) up and down, and a spring 5 is connected between the lower clamping seat 2 (62) and the lower clamping seat 1 (61); A lower clamping member (63) is slidably arranged on the lower clamping seat (62) in a forward and backward manner, a friction layer is arranged on the surface of the lower clamping member (63), and the lower clamping member (63) and the lower clamping seat (62) are matched with each other via a threaded member (64); In the process of clamping the lower end of the sample, the lower end of the sample is placed between the lower clamping members (63), and the threaded member (64) is screwed so that the lower clamping members (63) clamp the sample, and then the lower movable seat (5) is lowered to stretch the sample. When the spring force of the spring five is overcome and relative sliding occurs between the lower clamping seat two (62) and the lower clamping seat one (61), it indicates that the sample is tightened. The detection module (7) comprises: A pressure switch (71) is installed in the lower clamping seat 1 (61), and the pressure switch (71) is in contact with the bottom of the lower clamping seat 2 (62); The electric push rod (72) is installed in a hidden cavity opened inside the lower clamping seat (61), a power source is arranged in the hidden cavity, and the pressure switch (71), the electric push rod (72) and the power source are electrically connected; An ejection rod (73) is mounted on the output end of the electric push rod (72); an ejection plate (74) is mounted on the outer end of the ejection rod (73); the ejection plate (74) is circular, and the diameter of the ejection plate (74) is greater than the diameter of the ejection rod (73); A movable frame (75) is slidably disposed on the workbench (1) to the left and right, a spring (6) is connected between the movable frame (75) and the workbench (1), the movable frame (75) is a rectangular plate-shaped structure, and a matching groove (751) corresponding to the position of the ejection rod (73) is provided on the movable frame (75); The linkage module (8) comprises: A linkage plate (81) is slidably arranged on the support frame (2) to the left and right, a spring (7) is connected between the linkage plate (81) and the support frame (2), and the upper end of the linkage plate (81) is connected to the sliding frame (462) through a linkage rod (82); The second linkage rod (83) is mounted on the moving frame (75), and the second linkage rod (83) and the linkage plate (81) are in contact and extrusion fit; The anti-rotation mechanism (45) comprises: A rotation-stopping member (451) is slidably arranged on the upper clamping member (43) up and down, a brake layer is arranged on the surface of the rotation-stopping member (451), and a spring three is connected between the rotation-stopping member (451) and the upper clamping member (43); An extrusion member (452) is slidably disposed in the upper clamping member (43) to the left and right, the extrusion member (452) and the anti-rotation member (451) are extrusion-fitted, and the extrusion member (452) and the rotating clamping member (44) are connected via a traction rope (453); In the initial state, the anti-rotation member (451) and the upper clamping base (41) are not in contact with each other. During the anti-rotation process, the closing mechanism (46) pulls the extrusion member (452) to move outward through the traction rope (453). The extrusion member (452) moving outward squeezes the anti-rotation member (451) to move outward in the vertical direction. Extrusion friction occurs between the anti-rotation member (451) moving outward and the upper clamping base (41), so that the upper clamping member (43) is in a non-rotatable state. The clearance of the matching groove (751) is larger than the diameter of the ejection rod (73) and smaller than the diameter of the ejection plate (74); During the test, if the sample is in a vertical clamping state, when the lower movable seat (5) descends to a distance between the upper clamping module (4) and the lower clamping module (6) equal to the length to be tested, relative sliding occurs between the lower clamping seat 2 (62) and the lower clamping seat 1 (61), and the lower clamping seat 2 (62) and the pressure switch (71) are separated. At this time, the pressure switch (71) is closed, and a connecting circuit is formed between the pressure switch (71), the electric push rod (72), and the power supply. The electric push rod (72) pushes the ejection plate (74) outward, and the movable frame (75) is pushed outward. The movable module (8) is triggered; if the sample is greatly skewed, when the lower movable seat (5) descends to the distance between the upper clamping module (4) and the lower clamping module (6) equal to the length to be detected, relative sliding has already occurred between the lower clamping seat 2 (62) and the lower clamping seat 1 (61), which means that the electric push rod (72) is triggered in advance and the ejection plate (74) is ejected in advance. At this time, the ejection plate (74) is located on the outside of the movable frame (75), and the ejection rod (73) is in the matching groove (751). The movable frame (75) does not move, so the linkage module (8) will not be triggered.

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