A novel axial tensile strength testing device for cable protection pipes

Abstract

This invention discloses a novel axial tensile testing device for cable protection pipes, belonging to the technical field of cable testing equipment. It includes a main frame and an adjustment assembly. An auxiliary frame is mounted on the top of the main frame via a cylinder, and a second servo motor is installed inside the auxiliary frame. A second servo motor is mounted on the output end of the second servo motor, and a connecting shaft is provided at the output end of the second servo motor. A drive plate is mounted on the end of the connecting shaft. This novel axial tensile testing device for cable protection pipes employs a dual-cleaning design. An annular cleaning brush on the inner wall of the built-in cylinder performs comprehensive cleaning of the outer surface of the pipe, while a secondary cleaning by a cleaning brush head thoroughly removes foreign objects from the pipe surface. This prevents slippage during clamping, uneven localized stress, and tensile fracture deviation caused by foreign objects. Simultaneously, a fixing method combining rigid clamping and flexible limiting is used. The rigid clamping ensures that the pipe does not detach or slip during the tensile process.

Description

Technical Field

[0001] This invention relates to the field of cable testing equipment technology, specifically to a new material cable protection pipe axial tensile strength testing device. Background Technology

[0002] Cable protection conduits are made from a variety of materials, including metals, plastics, and fiberglass reinforced plastics. Their main function is to protect cables from mechanical damage and chemical corrosion, ensuring the safe and stable operation of the line. Axial tensile performance is an important indicator of its structural reliability, and specialized testing equipment is the core equipment for conducting this test.

[0003] For example, the invention with application number 202511229027.2 relates to the field of cable testing equipment technology, and discloses a test device and method for testing the axial tensile strength of cable protection pipes, including a mounting base. A pneumatic supply mechanism provides air pressure, and a flexible clamping mechanism achieves flexible clamping, avoiding damage to the clamping end. The internal and external compression airbags enhance the stability of the clamping mechanism, preventing slippage of the cable protection pipe sample and protecting the end of the cable protection pipe from damage. Therefore, accurate values ​​can be obtained, improving test precision. However, cleaning the pipe before axial testing is inconvenient, affecting the test results. Summary of the Invention

[0004] The purpose of this invention is to provide a new material cable protection pipe axial tensile strength testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a novel axial tensile strength testing device for cable protection pipes, comprising a main frame and an adjustment assembly. An auxiliary frame is mounted on the top of the main frame via a cylinder, and a second servo motor is disposed inside the auxiliary frame. A second servo motor is mounted on the output end of the second servo motor, and a connecting shaft is disposed at the output end of the second servo motor. A drive plate is mounted on the end of the connecting shaft, and a circumferentially shaped inclined groove is formed inside the drive plate. A clamping assembly for auxiliary clamping is rotatably mounted on the bottom of the drive plate, and the clamping assembly includes a bottom... The chassis comprises a disc, a slide, a built-in groove, and a clamping plate. The chassis has a built-in groove annularly formed inside, and a slide is slidably installed inside the groove. A clamping plate is provided at the bottom of the slide. A soft limiting component for auxiliary fixation is provided in the middle of the chassis. The soft limiting component includes an airbag, a connecting tube, and a suction / sucking air pump. One end of the airbag is connected to the connecting tube, and the end of the connecting tube is equipped with the suction / sucking air pump. An adjustment component for auxiliary cleaning is located below the clamping component. The adjustment component includes a cleaning plate, and the cleaning plate is provided in the middle of the main frame.

[0006] Furthermore, the cleaning plate has an internally threaded inner cylinder, and the inner wall of the inner cylinder is circumferentially distributed with cleaning brushes.

[0007] Further, there are three groups of the built-in cylinders arranged equidistantly with respect to the cleaning plate, and a guide rod is slidably installed inside the cleaning plate.

[0008] Further, the adjusting component further includes a servo motor I and a screw rod, and the output end of the servo motor I is equipped with the screw rod, and the cleaning plate is threadedly arranged on the outer surface of the screw rod.

[0009] Further, a side frame is arranged on one side of the outer part of the main frame, and a fixed frame is installed at the bottom of the side frame.

[0010] Further, a water storage tank is installed at the bottom of the fixed frame, and the fixed frame is in a "C" - shaped structure.

[0011] Further, the adjusting component further includes a cleaning brush head and a hydraulic rod. The hydraulic rod is arranged inside the side frame, and the cleaning brush head is installed at the output end of the hydraulic rod.

[0012] Further, connecting rods are annularly distributed on the outer surface of the auxiliary frame, and the ends of the connecting rods are fixedly connected to the chassis.

[0013] The present invention provides a device for testing the axial tensile degree of a new - material cable protection pipe, having the following beneficial effects: 1. Through a dual - cleaning design, the present invention uses the annular cleaning brush on the inner wall of the built - in cylinder to clean the outer surface of the pipe in all directions, and combines with the cleaning brush head for secondary cleaning of the cleaning brush, thoroughly removing foreign matters on the pipe surface, avoiding clamping slippage, local uneven stress, and tensile fracture deviation caused by foreign matters. At the same time, a fixing method combining rigid clamping and flexible limiting is adopted, and the rigid clamping ensures that the pipe does not fall off and does not slip during the stretching process.

[0014] 2. With three groups of the built - in cylinders arranged equidistantly with respect to the cleaning plate and different diameters of the built - in cylinders, the present invention can be adapted to new - material cable protection pipes of different specifications. Without replacing the core components, the testing of pipes of various specifications can be completed. The flexible limiting is achieved by the airbag fitting the inner wall of the pipe, avoiding the deformation of the pipe caused by local stress concentration. Combined with the anti - yaw design of the annular connecting rod, it ensures that the pipe is in a coaxial state during stretching. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the overall structural schematic diagram of a device for testing the axial tensile degree of a new - material cable protection pipe according to the present invention; Figure 2 is the structural schematic diagram of another perspective of a device for testing the axial tensile degree of a new - material cable protection pipe according to the present invention; Figure 3 is the structural schematic diagram of the main support frame of a device for testing the axial tensile degree of a new - material cable protection pipe according to the present invention; Figure 4 This is a schematic diagram of the auxiliary component structure of the axial tensile strength testing device for a new material cable protection pipe according to the present invention; Figure 5 This is a schematic diagram of the adjustment component structure of a new material cable protection pipe axial tensile strength testing device according to the present invention.

[0016] In the diagram: 1. Main frame; 2. Auxiliary frame; 3. Side frame; 4. Fixed frame; 5. Water tank; 6. Adjustment component; 601. Servo motor one; 602. Cleaning brush head; 603. Hydraulic rod; 604. Lead screw; 605. Cleaning plate; 7. Guide rod; 8. Clamping component; 801. Chassis; 802. Slide; 803. Internal groove; 804. Clamping plate; 9. Soft limit component; 901. Airbag; 902. Connecting pipe; 903. Suction / vacuum air pump; 10. Connecting rod; 11. Servo motor two; 12. Connecting shaft; 13. Internal cylinder; 14. Cleaning brush; 15. Drive plate; 16. Inclined groove. Detailed Implementation

[0017] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0018] like Figures 1-5As shown in the figure, a test device for the axial tensile degree of a new material cable protection pipe includes a main frame 1, an auxiliary frame 2, a side frame 3, a fixed frame 4, a water storage tank 5, an adjustment component 6, a servo motor 601, a cleaning brush head 602, a hydraulic rod 603, a screw rod 604, a cleaning plate 605, a guide rod 7, a clamping component 8, a chassis 801, a sliding seat 802, an internal groove 803, a clamping plate 804, a soft limit component 9, an airbag 901, a connecting pipe 902, a suction and discharge air pump 903, a connecting rod 10, a servo motor 11, a connecting shaft 12, an internal cylinder 13, a cleaning brush 14, a driving plate 15 and an inclined groove 16. The top of the main frame 1 is installed with an auxiliary frame 2 through a cylinder, and a servo motor 11 is arranged inside the auxiliary frame 2. The outer surface of the auxiliary frame 2 is annularly distributed with connecting rods 10, and the ends of the connecting rods 10 are fixedly connected to the chassis 801. The auxiliary frame 2 is rigidly connected to the chassis 801 through the annularly distributed connecting rods 10 to ensure that the clamping component 8 does not swing during the stretching process. A side frame 3 is arranged on one side outside the main frame 1, and a fixed frame 4 is installed at the bottom of the side frame 3. A water storage tank 5 is installed at the bottom of the fixed frame 4, and the fixed frame 4 has a "C" - shaped structure. The output end of the servo motor 11 is installed with a servo motor 11, and the output end of the servo motor 11 is provided with a connecting shaft 12. The end of the connecting shaft 12 is installed with a driving plate 15, and an inclined groove 16 is annularly opened inside the driving plate 15. The bottom of the driving plate 15 is rotatably installed with a clamping component 8 for auxiliary clamping, and the clamping component 8 includes a chassis 801, a sliding seat 802, an internal groove 803 and a clamping plate 804. An internal groove 803 is annularly opened inside the chassis 801, and a sliding seat 802 is slidably installed inside the internal groove 803. The bottom of the sliding seat 802 is provided with a clamping plate 804. The servo motor 11 drives the connecting shaft 12 to rotate,带动 the driving plate 15 to rotate synchronously. The inclined groove 16 inside the driving plate 1推动 the sliding seat 802 to slide towards the center along the internal groove 803 of the chassis 80,使 the clamping plate 804抱紧 the outer wall of the pipe from all around,实现 stable mechanical clamping. A displacement sensor is arranged at the chassis 801. The force sensor is connected in series between the piston rod of the cylinder at the top of the main frame 1 and the auxiliary frame 2. When the cylinder pulls the auxiliary frame 2 upwards, the pulling force will be directly transmitted to the force sensor,可实时采集 the axial pulling force value,同时结合 the displacement data to calculate the tensile degree. A soft limit component 9 for auxiliary fixation is arranged in the middle of the chassis 801, and the soft limit component 9 includes an airbag 901, a connecting pipe 902 and a suction and discharge air pump 903. One end of the airbag 901 is communicated with a connecting pipe 902, and the end of the connecting pipe 902 is installed with a suction and discharge air pump 903. The suction and discharge air pump 903充气 the airbag 901 through the connecting pipe 902. After the airbag 901 expands, it贴合 the inner wall of the pipe,形成 a flexible support,避免 rigid clamping导致的局部应力集中 or pipe deformation,同时提升 the clamping concentricity. The adjustment component 6 for auxiliary cleaning is arranged below the clamping component 8. The adjustment component 6 includes a cleaning plate 605, and the cleaning plate 605 is arranged in the middle of the main frame 1.The cleaning plate 605 has an internally threaded inner cylinder 13, and cleaning brushes 14 are circumferentially distributed on the inner wall of the inner cylinder 13. Three sets of inner cylinders 13 are equidistantly distributed about the cleaning plate 605. A guide rod 7 is slidably installed inside the cleaning plate 605.

[0019] like Figure 1 and Figure 2 As shown, the adjustment assembly 6 also includes a servo motor 601 and a lead screw 604. The lead screw 604 is installed at the output end of the servo motor 601. A cleaning plate 605 is threaded on the outer surface of the lead screw 604. The adjustment assembly 6 also includes a cleaning brush head 602 and a hydraulic rod 603. The hydraulic rod 603 is installed inside the side frame 3, and the cleaning brush head 602 is installed at the output end of the hydraulic rod 603. The suction and suction dual-purpose air pump 903 inflates the air bag 901 through the connecting pipe 902. After the air bag 901 expands, it fits against the inner wall of the pipe to form a flexible support. The user pre-places the pipe to be tested and then performs the above-mentioned flexible limit. The servo motor 601 drives the lead screw 604 to rotate, which drives the cleaning plate 605 to move horizontally along the guide rod 7. By moving the position of the cleaning plate 605, it is easy for the cleaning plate 605 to be located below the clamping assembly 8, so that the clamping assembly 8 can be driven by the cylinder. When the soft limiting component 9 moves upward, the flexible limiting tube moves accordingly, allowing the tube to move upward along the inner wall of the inner cylinder 13. The flexible cleaning brush 14 on the inner wall of the inner cylinder 13 can clean the outer surface of the tube. Because the tube is limited from the inner wall, it can be completely cleaned from the outside, preventing foreign objects from adhering to the outer surface of the tube and affecting the accuracy of subsequent clamping depth tests. It also prevents breakage caused by localized stress due to foreign objects. After the cleaning plate 605 is used up, the servo motor 601 drives the lead screw 604 to rotate, causing the cleaning plate 605 to move horizontally to one side along the guide rod 7. This allows the cleaning brush head 602 to be moved down into the water tank 5 using the design of the hydraulic rod 603 for water intake. Then, by moving the cleaning brush head 602 up or down, it reciprocates in the middle of the inner cylinder 13, facilitating the cleaning of the cleaning brush 14 in the inner cylinder 13 for reuse.

[0020] In summary, the axial tensile strength testing device for this new material cable protection pipe firstly... Figures 1-5In the structure shown, during use, the dual-purpose suction and suction air pump 903 inflates the airbag 901 through the connecting pipe 902. After the airbag 901 expands, it adheres to the inner wall of the pipe, forming a flexible support. The user pre-places the pipe to be tested and then performs the aforementioned flexible limiting. The servo motor 601 drives the lead screw 604 to rotate, causing the cleaning plate 605 to move horizontally along the guide rod 7. By moving the cleaning plate 605, it is convenient for the cleaning plate 605 to be positioned below the clamping assembly 8. This allows for flexible support when the cylinder moves the clamping assembly 8 and the soft limiting assembly 9 upwards. The limited-position tube moves along the inner wall of the inner cylinder 13, allowing it to move upwards. The flexible cleaning brush 14 on the inner wall of the inner cylinder 13 can then clean the outer surface of the tube. Because the tube is limited from the inner wall, it can be completely cleaned from the outside, preventing foreign matter from adhering to the outer surface and affecting the accuracy of subsequent depth testing after clamping. This also prevents breakage due to localized stress caused by foreign matter. After the cleaning plate 605 is used, the servo motor 601 drives the lead screw 604 to rotate, moving the cleaning plate 605 horizontally to one side along the guide rod 7 for easy access using liquid... The design of the pressure rod 603 drives the cleaning brush head 602 to move down into the water storage tank 5 for water intake. Then, by moving the cleaning brush head 602 up or down, it reciprocates in the middle of the inner cylinder 13, facilitating the cleaning brush 14 inside the inner cylinder 13 for cleaning, so it can be reused. Next, the suction and suction dual-purpose air pump 903 inflates the air bag 901 through the connecting pipe 902. After inflating, the air bag 901 adheres to the inner wall of the pipe, forming a flexible support to avoid localized stress concentration or pipe deformation caused by rigid clamping, while also improving clamping concentricity. The servo motor 11 drives the connection. The shaft 12 rotates, causing the drive plate 15 to rotate synchronously. The inclined groove 16 inside the drive plate 15 pushes the slide block 802 to slide towards the center along the built-in groove 803 of the chassis 801, so that the clamping plate 804 hugs the outer wall of the pipe from all sides, achieving stable mechanical clamping. A displacement sensor is set at the chassis 801, and a force sensor is connected in series between the cylinder piston rod at the top of the main frame 1 and the auxiliary frame 2. When the cylinder pulls the auxiliary frame 2 upward, it drives the pipe after the end is fixed. The tension is directly transmitted to the force sensor, which can collect the axial tension value in real time and calculate the tensile strength by combining the displacement data.

[0021] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A novel material cable protection pipe axial tensile strength testing device, comprising a main frame (1) and an adjustment assembly (6), characterized in that, The top of the main frame (1) is equipped with an auxiliary frame (2) through a cylinder, and a second servo motor (11) is arranged inside the auxiliary frame (2). The output end of the second servo motor (11) is equipped with a second servo motor (11), and a connecting shaft (12) is arranged at the output end of the second servo motor (11). A driving plate (15) is installed at the end of the connecting shaft (12), and an inclined groove (16) is annularly formed inside the driving plate (15). A clamping component (8) for auxiliary clamping is rotatably installed at the bottom of the driving plate (15), and the clamping component (8) includes a chassis (801), a sliding seat (802), an internal groove (803) and a clamping plate (804). An internal groove (803) is annularly formed inside the chassis (801), and a sliding seat (802) is slidably installed inside the internal groove (803). A clamping plate (804) is arranged at the bottom of the sliding seat (802). A soft limit component (9) for auxiliary fixation is arranged in the middle of the chassis (801), and the soft limit component (9) includes an airbag (901), a connecting pipe (902) and a suction and discharge air pump (903). One end of the airbag (901) is communicated with a connecting pipe (902), and a suction and discharge air pump (903) is installed at the end of the connecting pipe (902). An adjusting component (6) for auxiliary cleaning is arranged below the clamping component (8), and the adjusting component (6) includes a cleaning plate (605), and a cleaning plate (605) is arranged in the middle of the main frame (1).

2. The axial tensile strength testing device for a new material cable protection pipe according to claim 1, characterized in that, An internal cylinder (13) is installed inside the cleaning plate (605) by means of threads, and cleaning brushes (14) are annularly distributed on the inner wall of the internal cylinder (13).

3. The axial tensile strength testing device for a new material cable protection pipe according to claim 2, characterized in that, There are three groups of the internal cylinders (13) equidistantly distributed with respect to the cleaning plate (605), and a guide rod (7) is slidably installed inside the cleaning plate (605).

4. The axial tensile strength testing device for a new material cable protection pipe according to claim 3, characterized in that, The adjusting component (6) further includes a first servo motor (601) and a lead screw (604), and the output end of the first servo motor (601) is installed with a lead screw (604), and the cleaning plate (605) is threadedly arranged on the outer surface of the lead screw (604).

5. The axial tensile strength testing device for a new material cable protection pipe according to claim 4, characterized in that, A side frame (3) is arranged on one side outside the main frame (1), and a fixed frame (4) is installed at the bottom of the side frame (3).

6. The axial tensile strength testing device for a new material cable protection pipe according to claim 5, characterized in that, A water storage tank (5) is installed at the bottom of the fixed frame (4), and the fixed frame (4) has a "U" - shaped structure.

7. The axial tensile strength testing device for a new material cable protection pipe according to claim 6, characterized in that, The adjusting component (6) further includes a cleaning brush head (602) and a hydraulic rod (603). A hydraulic rod (603) is arranged inside the side frame (3), and a cleaning brush head (602) is installed at the output end of the hydraulic rod (603).

8. The axial tensile strength testing device for a new material cable protection pipe according to claim 6, characterized in that, Link rods (10) are annularly distributed on the outer surface of the auxiliary frame (2), and the ends of the link rods (10) are fixedly connected to the chassis (801). It should be noted that in the original text "所述伺服电机二(11)的输出端安装有伺服电机二(11)", this seems to be an incorrect description. It is translated as it is in this translation.

9. The axial tensile strength testing device for a new material cable protection pipe according to claim 8, characterized in that, The operation method is as follows: The suction and suction dual-purpose air pump (903) inflates the airbag (901) through the connecting pipe (902). After the airbag (901) expands, it fits against the inner wall of the pipe to form a flexible support. The pipe to be tested is pre-placed, and then the above-mentioned flexible limit is performed. The servo motor (601) drives the lead screw (604) to rotate, which drives the cleaning plate (605) to move horizontally along the guide rod (7). By moving the position of the cleaning plate (605), it is easy for the cleaning plate (605) to be below the clamping assembly (8). The cylinder drives the clamping assembly. When the holding component (8) and the soft limiting component (9) move upward, the flexible limiting pipe moves accordingly, thus moving the pipe upward along the inner wall of the inner cylinder (13). The flexible cleaning brush (14) on the inner wall of the inner cylinder (13) cleans the outer surface of the pipe. After the cleaning plate (605) is finished, the servo motor (601) drives the lead screw (604) to rotate, causing the cleaning plate (605) to move horizontally to one side along the guide rod (7). This facilitates the use of the hydraulic rod (603) to move the cleaning brush head (602) down into the water storage tank (5) for retrieval. Water treatment is performed, and then the cleaning brush head (602) is moved up or down to reciprocate in the middle of the inner cylinder (13), which facilitates the cleaning brush (14) in the inner cylinder (13) to clean. The suction and suction dual-purpose air pump (903) inflates the air bag (901) through the connecting pipe (902). After the air bag (901) expands, it fits against the inner wall of the pipe to form a flexible support, avoiding local stress concentration or pipe deformation caused by rigid clamping. The servo motor 2 (11) drives the connecting shaft (12) to rotate, which drives the drive plate (15) to rotate synchronously. The drive plate (15) The inclined groove (16) inside pushes the slide (802) to slide towards the center along the built-in groove (803) of the chassis (801), so that the clamping plate (804) hugs the outer wall of the pipe from all sides to achieve stable mechanical clamping. A displacement sensor is set at the chassis (801), and a force sensor is connected in series between the cylinder piston rod at the top of the main frame (1) and the auxiliary frame (2). When the cylinder pulls the auxiliary frame (2) upward, it will drive the pipe after the end is fixed. The tension will be directly transmitted to the force sensor, which can collect the axial tension value in real time and calculate the tensile degree in combination with the displacement data.

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