A protective clothing testing stretching device

Abstract

This utility model relates to the field of tensile testing, and more particularly to a tensile testing device for protective clothing. The technical solution is as follows: A tensile testing device for protective clothing includes a CNC base, a first support frame, a second support frame, and a lifting platform. A tensile groove is formed at the upper edge of the CNC base, and an installation groove is formed on the lower inner wall of the tensile groove. A second pneumatic soft claw is fixedly connected in the installation groove. This utility model uses a combination of displacement and torque sensors to achieve real-time acquisition of all parameters during the tensile process. Combined with a three-point support structure formed by three sets of annularly distributed guide rails and a movable sleeve, it ensures that the lifting platform has no radial offset during the tensile process. Simultaneously, the matching design of the limiting block and the first limiting groove further restricts platform sway, effectively improving the accuracy of tensile testing of protective clothing and reducing testing errors. This solves the problem of poor tensile testing performance in existing protective clothing tensile testing devices.

Description

Technical Field

[0001] This utility model belongs to the field of tensile testing, specifically relating to a tensile testing device for protective clothing. Background Technology

[0002] Protective clothing serves as a crucial protective barrier for personnel in fields such as medical care, chemical engineering, and emergency rescue. Its mechanical properties (especially tensile strength and elongation at break) directly determine its protective effectiveness and service life. Protective clothing tensile testing devices are specialized equipment designed to simulate the stress conditions of protective clothing during actual wear and use, accurately testing its tensile properties. They are one of the core testing tools for ensuring the quality of protective clothing products.

[0003] In existing technologies, traditional tensile testing devices mostly require manual clamping of the sample and adjustment of the tensile length. This manual adjustment not only results in long testing cycles but is also prone to errors due to human error. Furthermore, existing devices often only measure displacement or force, making it difficult to simultaneously acquire multi-dimensional data, leading to limited tensile testing data for protective clothing. Additionally, the traditional single-rail design of the tensile testing structure experiences significant swaying during use, which can affect the accuracy of the sensor data. Therefore, this invention proposes a tensile testing device for protective clothing to address the problems existing in the prior art. Utility Model Content

[0004] To overcome the problem of poor tensile testing effect of existing protective clothing testing tensile devices during use.

[0005] The technical solution of this utility model is as follows: a protective clothing testing stretching device, including a CNC base, a first bearing frame, a second bearing frame, and a lifting platform. A stretching groove is formed at the upper edge of the CNC base, and an installation groove is formed on the lower inner wall of the stretching groove. A second pneumatic soft claw is fixedly connected in the installation groove. The first bearing frame is installed at the rear edge of the CNC base, and the second bearing frame is installed at the upper end of the first bearing frame. A first limiting groove is formed through the front end of the second bearing frame. A lead screw is rotatably installed between the inner walls of the first and second bearing frames. A servo motor is installed at the lower end of the first bearing frame, and the output end of the servo motor passes through the first bearing frame and connects to the lead screw. Screw grooves are formed through the upper and lower edges of the lifting platform, and second limiting grooves are formed at the left and right ends of the lifting platform. Three sets of equidistantly distributed limiting blocks are installed at the left and right ends of the lifting platform. A connecting frame is installed at the front end of the lifting platform, and a displacement sensor is installed inside the connecting frame. A torque sensor is installed at the lower end of the displacement sensor, and a housing is installed at the lower end of the torque sensor. The first pneumatic soft claw is installed inside the housing.

[0006] Preferably, the lower end of the lower inner wall of the first bearing frame is fixedly connected to the lower end of three sets of equally spaced guide rails, and the upper end of the three sets of guide rails is fixedly connected to the upper inner wall of the second bearing frame. The three sets of guide rails are arranged in a ring along the outer wall of the lead screw.

[0007] Preferably, the outer wall of the lifting platform is fixed with three sets of equidistant movable sleeves, and the upper and lower ends of the movable sleeves are provided with sliding grooves. The three sets of movable sleeves are arranged in a ring along the outer wall of the screw groove.

[0008] Preferably, the guide rails and movable sleeves correspond one-to-one, and the inner wall of the slide groove fits against the outer wall of the guide rail.

[0009] Preferably, anti-slip feet are installed at the four corners of the lower end of the CNC base, and an operation panel is installed on the inclined surface of the CNC base.

[0010] Preferably, the first limiting groove is adapted to the second limiting groove, and the screw groove is adapted to the lead screw.

[0011] Preferably, the first pneumatic soft claw and the second pneumatic soft claw are distributed vertically and correspond to each other, and the end of the limiting block near the second bearing frame is in contact with the front inner wall and front end of the second bearing frame.

[0012] The beneficial effects of this utility model are:

[0013] 1. By combining displacement sensors and torque sensors, real-time acquisition of all parameters during the tensile process can be achieved, thereby effectively improving the accuracy of protective clothing during tensile testing and reducing testing errors;

[0014] 2. A three-point support structure is formed by three sets of ring-shaped guide rails and movable sleeves to ensure that the lifting platform has no radial displacement during the stretching process;

[0015] 3. By adapting the limit block to the first limit groove, the platform swing is further restricted, the deviation between the stretching direction and the sample axis is reduced, and the test results are avoided due to stress concentration. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the protective clothing testing and stretching device of this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional disassembled view of the protective clothing testing and stretching device of this utility model.

[0018] Figure 3 The diagram shown is a three-dimensional disassembled view of the CNC base and the second pneumatic soft claw of the protective clothing testing and stretching device of this utility model.

[0019] Figure 4The diagram shown is a three-dimensional disassembled view of the first bearing frame, second bearing frame, guide rail, lead screw, and servo motor of the protective clothing testing and stretching device of this utility model.

[0020] Figure 5 The diagram shown is a three-dimensional structural schematic of the lifting platform of the protective clothing testing and stretching device of this utility model.

[0021] Figure 6 The diagram shown is a three-dimensional disassembled view of the displacement sensor, torque sensor, outer shell, and first pneumatic soft claw of the protective clothing tension detection device of this utility model.

[0022] Figure 7 The diagram shown is a schematic diagram of the operating logic of the tensile testing system of the protective clothing tensile testing device of this utility model.

[0023] Explanation of reference numerals in the attached drawings: 1-CNC base, 2-First bearing frame, 3-Second bearing frame, 4-Lifting platform, 5-Displacement sensor, 6-First pneumatic soft gripper, 7-Second pneumatic soft gripper, 8-Operation panel, 9-Tension groove, 10-Mounting groove, 11-Anti-slip foot, 12-First limit groove, 13-Guide rail, 14-Lead screw, 15-Servo motor, 16-Connecting frame, 17-Limit stop, 18-Second limit groove, 19-Modible sleeve, 20-Screw groove, 21-Slide groove, 22-Housing shell, 23-Torque sensor. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please see Figures 1-7This utility model provides an embodiment of a protective clothing testing and stretching device, including a CNC base 1, a first support frame 2, a second support frame 3, and a lifting platform 4. A stretching groove 9 is formed at the upper edge of the CNC base 1, and an installation groove 10 is formed on the lower inner wall of the stretching groove 9. A second pneumatic soft claw 7 is fixedly connected in the installation groove 10. The first support frame 2 is installed at the rear edge of the CNC base 1, and the second support frame 3 is installed at the upper end of the first support frame 2. A first limiting groove 12 is formed through the front end of the second support frame 3. A lead screw 1 is rotatably installed between the inner walls of the first support frame 2 and the second support frame 3. 4. A servo motor 15 is installed at the lower end of the first bearing frame 2. The output end of the servo motor 15 passes through the first bearing frame 2 and is connected to the lead screw 14. The upper and lower edges of the lifting platform 4 are provided with threaded grooves 20. The left and right ends of the lifting platform 4 are provided with second limit grooves 18. Three sets of equidistant limit blocks 17 are installed at the left and right ends of the lifting platform 4. A connecting frame 16 is installed at the front end of the lifting platform 4. A displacement sensor 5 is installed inside the connecting frame 16. A torque sensor 23 is installed at the lower end of the displacement sensor 5. A housing 22 is installed at the lower end of the torque sensor 23. A first pneumatic soft claw 6 is installed inside the housing 22.

[0026] By combining displacement sensor 5 and torque sensor 23, real-time acquisition of all parameters during the stretching process is achieved, thereby effectively improving the accuracy of protective clothing during stretching testing and reducing testing errors. The three sets of ring-shaped guide rails 13 cooperate with the movable sleeve 19 to form a three-point support structure to ensure that the lifting platform 4 has no radial offset during the stretching process. At the same time, the matching design of the limiting block 17 and the first limiting groove 12 further restricts the platform swing, reduces the deviation between the stretching direction and the sample axis, and avoids test result distortion caused by stress concentration.

[0027] Please see Figure 4In this embodiment, the lower end of three sets of equidistantly distributed guide rails 13 are fixedly connected to the lower inner wall of the first bearing frame 2, and the upper ends of the three sets of guide rails 13 are fixedly connected to the upper inner wall of the second bearing frame 3. The three sets of guide rails 13 are arranged in a ring along the outer wall of the lead screw 14. The three sets of ring-shaped guide rails 13 can provide multi-directional limiting assistance for the lifting platform 4 to improve its stability during lifting and adjustment. The outer wall of the lifting platform 4 is fixedly connected to three sets of equidistantly distributed movable sleeves 19. The upper and lower ends of the movable sleeves 19 are provided with sliding grooves 21. The three sets of movable sleeves 19 are arranged along the outer wall of the lead screw 14. The outer wall of the screw groove 20 is arranged in a ring shape, and the three ring-shaped movable sleeves 19 can provide multi-point limit for the lifting platform 4 driven by the lead screw 14 to help improve its stability during lifting and adjustment. The guide rail 13 corresponds one-to-one with the movable sleeve 19, and the inner wall of the slide groove 21 fits against the outer wall of the guide rail 13. The three ring-shaped guide rails 13, together with the three movable sleeves 19, can provide preliminary limit assistance for the lifting and stretching operation of the lifting platform 4 to improve the accuracy of the displacement sensor 5 and torque sensor 23 on the lifting platform 4 during stretching detection.

[0028] Please see Figure 3 In this embodiment, anti-slip feet 11 are installed at the four corners of the lower end of the CNC base 1, and an operation panel 8 is installed on the inclined surface of the CNC base 1. The anti-slip feet 11 can simultaneously ensure the stability of the CNC base 1 during placement and use, while the operation panel 8 can facilitate user operation and also facilitate the acquisition of data from the protective clothing stretch test.

[0029] Please see Figures 3-6 In this embodiment, the first limiting groove 12 and the second limiting groove 18 are adapted to each other, and the screw groove 20 is adapted to the lead screw 14. The adapted first limiting groove 12 and the second limiting groove 18 can further limit the outer walls of the left and right sides of the lifting platform 4, thereby improving its stability during the lifting and stretching process. The first pneumatic soft claw 6 and the second pneumatic soft claw 7 are distributed vertically and correspond to each other. The end of the limiting block 17 near the second bearing frame 3 is in contact with the inner wall and front end of the second bearing frame 3. The corresponding first pneumatic soft claw 6 and the second pneumatic soft claw 7 can keep the protective clothing as centrally stretched as possible during the stretching test, thereby improving the accuracy of the stretching test of the protective clothing.

[0030] The displacement sensor 5 can be a Keyence IL-600 series, a Milon MPS-L-500mm series, or a Turck TMW-500 series; the torque sensor 23 can be an HBMU9B / 500N series, a Zemic H3-C3-500N-3B series, or a Turck Interface SSM-500N series; and the first pneumatic soft gripper 6 and the second pneumatic soft gripper 7 can be an SMCMHSL2-16D series, a Festo HGPM-10-AB series, or an Airtac HFTZ-10 series, such as... Figure 7 The flowchart of the tensile testing system shown below illustrates the specific control method:

[0031] First, place one end of the protective suit to be tested into the stretching groove 9 of the CNC base 1. The second pneumatic soft claw 7 in the mounting groove 10 clamps and fixes the end of the protective suit to be tested, while the other end is gripped by the first pneumatic soft claw 6 under the lifting platform 4. The second pneumatic soft claw 7 and the first pneumatic soft claw 6 are driven by air pressure to adaptively adjust the clamping force to avoid damaging the flexible material. At this time, the displacement sensor 5 and the torque sensor 23 are in the initial state. The test parameters are set through the operation panel 8.

[0032] Next, the servo motor 15 is started to drive the lead screw 14 to rotate. Since the screw groove 20 of the lifting platform 4 is adapted to the lead screw 14, and the slide groove 21 of the movable sleeve 19 is in contact with the guide rail 13, the lifting platform 4 rises vertically along the lead screw 14, while being constrained by the guide rail 13 to maintain stable translation, so as to drive the first pneumatic soft claw 6 to rise to stretch the protective clothing.

[0033] During this process, displacement sensor 5 monitors tensile displacement in real time, torque sensor 23 measures tensile force synchronously, and the data is displayed in real time through operation panel 8 and can be recorded and stored through CNC system;

[0034] When the preset displacement or force value is reached, the servo motor 15 stops automatically. At this time, the CNC base 1 can calculate parameters such as elongation at break and tensile strength through the data analysis module. After the test is completed, the motor reverses to reset the lifting platform 4, and the pneumatic soft claw releases the sample, completing a single test process.

[0035] Through the above steps, the combination of displacement sensor 5 and torque sensor 23 enables real-time acquisition of all parameters during the stretching process. Combined with the three-point support structure formed by three sets of annularly distributed guide rails 13 and movable sleeve 19, it ensures that the lifting platform 4 has no radial displacement during the stretching process. At the same time, the matching design of the limit block 17 and the first limit groove 12 further restricts the platform swing, which can effectively improve the accuracy of protective clothing during stretching detection and reduce detection errors, thus solving the problem of poor stretching detection effect of existing protective clothing testing stretching devices.

[0036] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A protective clothing stretching detection device, comprising a CNC base (1), characterized in that: It also includes a first bearing frame (2), a second bearing frame (3), and a lifting platform (4). A tension groove (9) is provided at the upper edge of the CNC base (1), and an installation groove (10) is provided on the lower inner wall of the tension groove (9). A second pneumatic soft claw (7) is fixedly connected in the installation groove (10). The first bearing frame (2) is installed at the rear edge of the CNC base (1). The second bearing frame (3) is installed at the upper end of the first bearing frame (2). A first limiting groove (12) is provided through the front end of the second bearing frame (3). A lead screw (14) is rotatably installed between the inner walls of the first bearing frame (2) and the second bearing frame (3). A servo motor is installed at the lower end of the first bearing frame (2). (15) The output end of the servo motor (15) passes through the first bearing frame (2) and is connected to the lead screw (14). The upper and lower edges of the lifting platform (4) are provided with threaded grooves (20). The left and right ends of the lifting platform (4) are provided with second limit grooves (18). The left and right ends of the lifting platform (4) are provided with three sets of equidistant limit blocks (17). The front end of the lifting platform (4) is provided with a connecting frame (16). The connecting frame (16) is provided with a displacement sensor (5). The lower end of the displacement sensor (5) is provided with a torque sensor (23). The lower end of the torque sensor (23) is provided with a housing (22). The housing (22) is provided with a first pneumatic soft claw (6).

2. The protective clothing testing and stretching device according to claim 1, characterized in that: The lower end of the inner wall of the first bearing frame (2) is fixed with the lower end of three sets of equally spaced guide rails (13), and the upper end of the three sets of guide rails (13) is fixed to the upper end of the inner wall of the second bearing frame (3). The three sets of guide rails (13) are arranged in a ring along the outer wall of the lead screw (14).

3. The protective clothing testing and stretching device according to claim 1, characterized in that: The outer wall of the lifting platform (4) is fixed with three sets of equidistant movable sleeves (19). The upper and lower ends of the movable sleeves (19) are provided with sliding grooves (21). The three sets of movable sleeves (19) are arranged in a ring along the outer wall of the screw groove (20).

4. The protective clothing testing and stretching device according to claim 1, characterized in that: The guide rail (13) corresponds one-to-one with the movable sleeve (19), and the inner wall of the slide groove (21) fits against the outer wall of the guide rail (13).

5. The protective clothing testing and stretching device according to claim 1, characterized in that: Anti-slip feet (11) are installed at the four corners of the lower end of the CNC base (1), and an operation panel (8) is installed on the inclined surface of the CNC base (1).

6. The protective clothing testing and stretching device according to claim 1, characterized in that: The first limiting groove (12) is adapted to the second limiting groove (18), and the screw groove (20) is adapted to the lead screw (14).

7. The protective clothing testing and stretching device according to claim 1, characterized in that: The first pneumatic soft claw (6) and the second pneumatic soft claw (7) are distributed vertically and correspond to each other. The end of the limiting block (17) close to the second bearing frame (3) is in contact with the inner wall and front end of the second bearing frame (3).

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