A force applying device for composite pipe stiffness detection

Abstract

A kind of composite material pipe stiffness detection force applying device, movable trolley is equipped with movable closer or farther stand, each stand is equipped with support plate that can be matched with non-standard pipe such as medicine cartridge, through screw rod elevator, hanging block, electronic scale and belt, a device that can accurately exert external force is designed, the device can provide real-time external force data, ensure the accuracy and consistency of test results.The reasonable support structure of stand ensures that the pipe is always in a stable state during testing, at the same time, high-precision electronic scale is used for force measurement to avoid errors and interference, improve the overall stability and measurement accuracy of the system.Through reasonable design layout, optimize the structure of each component, ensure that each component can be compactly combined together, while ensuring efficient operation and easy maintenance of the device.The device can adapt to composite material pipes of different diameters and lengths, and effectively exert external force on various pipes.

Description

Technical Field

[0001] This utility model relates to the technical field of pipe testing equipment, specifically a force application device for testing the stiffness of composite material pipes. Background Technology

[0002] Composite material pipes are widely used in aerospace, shipbuilding, and other fields due to their excellent mechanical properties, lightweight and high strength, and corrosion resistance. They are gradually replacing traditional metal pipes, especially in structural materials and transmission pipelines. Their stiffness is crucial to deformation and stability during operation, directly affecting structural safety. However, the heterogeneity and anisotropy of composite materials make the accuracy and reliability of stiffness testing a challenge.

[0003] Among existing testing methods, static testing is complex, time-consuming, and has poor adaptability; vibration testing is computationally complex and has low measurement accuracy; strain measurement is costly and complex to operate. Existing testing methods are mostly designed for pipes of standard shapes and sizes, and suffer from instability, poor adaptability, and low efficiency. For special composite material pipes such as drug reservoirs, these pipes typically need to maintain structural integrity under internal and external pressure, and often have complex shapes and diverse stress loading conditions. Due to their special functional requirements, existing mature testing methods and equipment cannot accurately reflect their anisotropic characteristics and cannot meet their specific needs, thus necessitating the development of specialized testing technologies. Utility Model Content

[0004] The purpose of this invention is to provide a force application device for testing the stiffness of composite material pipes, which can effectively test the force on special composite material pipes with non-standard shapes and complex loading conditions, such as medicine storage cylinders, and solves the problems in the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a force application device for testing the stiffness of composite material pipes, including a mobile trolley, on which are provided two sets of movable uprights that can move closer or further away. Each upright is provided with a detachable support plate, and the support plate has a slot that matches the pipe. A screw jack is installed on the mobile trolley between the two sets of uprights. The housing of the screw jack is fixed on the mobile trolley. A first handle is installed at the end of the horizontally arranged worm gear in the screw jack, and a hanging block is installed at the end of the vertically arranged screw in the screw jack. An electronic scale is also provided between the hanging block and the pipe to be tested. One end of the electronic scale is connected to a belt through a first hook, and the other end of the electronic scale is connected to the hanging block through a second hook. The belt can be hung on the pipe to be tested. When the screw moves down, it can drive the belt to pull down the pipe to be tested, and the applied downward force is measured by the electronic scale. The support frame includes a base plate and a top plate, connected by several vertically arranged columns. The base plate is movable on a mobile trolley, and the top plate has a detachable support plate. The mobile trolley is equipped with two slide rails arranged along its length. The bottom of the base plate has sliders that mate with the slide rails. Threaded holes are also formed in the base plate, and stop bolts are fitted into these holes. A second handle is located at the end of the stop bolt extending upwards through the base plate, and a friction block is located at the end extending downwards through the base plate. The slide rails are horizontally arranged cylindrical rods, with their bottoms connected to the mobile trolley. Each slider has a cylindrical groove that mates with the cylindrical rod, and the bottom of the groove has an opening. When the friction block contacts the mobile trolley, the cylindrical groove restricts the vertical movement of the slider relative to the slide rail. A folding plate is located on one side of the two top plates that are close together. A support plate is mounted on the folding plate by connecting bolts, and a recessed groove that mates with the connecting bolts is formed on the support plate. The mobile trolley is equipped with casters at the four corners of its bottom. Each caster includes a connecting frame located at the bottom of the mobile trolley. A rotatable wheel frame is mounted on the bottom of the connecting frame via a bearing. A nylon roller is installed inside the wheel frame. A stop plate is also hinged to one side of the wheel frame. The stop plate can rotate to contact the nylon roller.

[0006] The positive effects of this utility model are as follows: The force application device for testing the stiffness of composite material pipes described herein features a movable frame on a mobile trolley, capable of moving closer to or further away from the pipe. Each frame is equipped with a support plate that can accommodate non-standard pipes such as medicine storage cylinders. Through a screw jack, mounting blocks, an electronic scale, and a belt, a device capable of precisely applying external force is designed. This device provides real-time data on the applied external force, ensuring the accuracy and consistency of the test results. The reasonable support structure, including the frame, ensures the pipe remains stable throughout the testing process. Simultaneously, the use of a high-precision electronic scale for force measurement avoids errors and interference, improving the overall stability and measurement accuracy of the system. The composite material pipe testing and data acquisition process can be automated, reducing manual intervention and improving testing efficiency and accuracy. Through a reasonable design layout and optimized structure of each component, the device can be compactly assembled, ensuring efficient operation and easy maintenance. This allows the device to adapt to composite material pipes of different diameters and lengths, and to effectively apply external force to various types of pipes. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0008] Figure 2 This is the front view of this utility model;

[0009] Figure 3 yes Figure 2 Side view;

[0010] Figure 4 yes Figure 2 An enlarged view of the sectional view along the AA direction;

[0011] Figure 5 This is a structural diagram of a caster wheel. Detailed Implementation

[0012] The present invention relates to a force application device for testing the stiffness of composite material pipes, such as... Figure 1-3 As shown, the device includes a mobile trolley 1, on which are two sets of movable uprights that can move closer to or further away from each other. Each upright is equipped with a detachable support plate 3, and the support plate 3 has slots 4 that mate with the pipe being tested. The support plate 3 can be adapted to the shape of the pipe being tested, and the distance between the two sets of uprights can be adjusted according to the actual length of the pipe being tested to ensure that the stress position on the pipe being tested remains stable. The movement of the uprights on the mobile trolley 1 can be achieved through a transmission mechanism such as a gear rack, a lead screw, or a nut.

[0013] A screw jack 5 is installed on a moving trolley 1 between two sets of uprights. The housing of the screw jack 5 is fixed on the moving trolley 1. A first handle 7 is installed at the end of the horizontally arranged worm gear 6 in the screw jack 5. A hanging block 25 is installed at the end of the vertically arranged screw 8 in the screw jack 5. The hanging block 25 is located at the lower part of the pipe to be tested. The screw jack 5 can be an existing HK 50T model Guokui screw jack reducer.

[0014] An electronic scale 9 is also provided between the mounting block 25 and the pipe to be tested. One end of the electronic scale 9 is connected to a belt 11 via a first hook 10, and the other end of the electronic scale 9 is connected to the mounting block 25 via a second hook 12. The belt 11 can be mounted on the pipe to be tested. Turning the first handle 7 can drive the screw 8 to move vertically up and down. When the screw 8 moves down, it can drive the belt 11 to pull down the pipe to be tested for stiffness testing. The applied downward force can be accurately measured by the electronic scale 9.

[0015] Furthermore, in order to ensure the strength of the support frame, the support frame may include a base plate 26 and a top plate 13, and a number of vertically arranged columns 14 are connected between the base plate 26 and the top plate 13. The base plate 26 can move on the moving trolley 1, and the top plate 13 is provided with a detachable support plate 3.

[0016] To adjust the position of the upright on the moving trolley 1, two slide rails 15 arranged along the length direction can be installed on the moving trolley 1. A slider 16 that mates with the slide rails 15 is provided at the bottom of the base plate 26. To lock the upright in place on the slide rails 15, a threaded hole is provided on the base plate 26, and a stop bolt 17 is installed in the threaded hole. A second handle 18 is provided at one end of the stop bolt 17 extending upwards through the base plate 26, and a friction block 19 is provided at the other end extending downwards through the base plate 26. Rotating the second handle 18 moves the stop bolt 17 downwards until the friction block 19 contacts the moving trolley 1. The friction between the friction block 19 and the moving trolley 1 locks the upright relatively at a specified length position on the slide rails 15, allowing for adaptive adjustment according to the actual length of the pipe to be tested.

[0017] The slide rail 15 is a horizontally arranged cylindrical rod. The bottom of the cylindrical rod is connected to the moving trolley 1. Each slider 16 has a cylindrical groove that mates with the cylindrical rod. The bottom of the cylindrical groove has an opening. After the friction block 19 contacts the moving trolley 1, the cylindrical groove can restrict the vertical movement of the slider 16 relative to the slide rail 15, ensuring the stable installation of the slider 16 and the slide rail 15. This prevents the slider 16 from separating from the slide rail 15 when the stop bolt 17 moves vertically, thus failing to provide the necessary guiding function.

[0018] Furthermore, to facilitate the disassembly and replacement of the support plate 3, a folding plate 20 is provided on the side of the two top plates 13 that are close to each other. The support plate 3 is installed on the folding plate 20 by connecting bolts 21. A groove is provided on the support plate 3 to cooperate with the connecting bolts 21. The groove is designed so that the connecting bolts 21 will not protrude from the inner side of the support plate 3 after installation. When clamping the pipe to be tested, the connecting bolts 21 will not interfere with or rub against the outer circumference of the pipe.

[0019] Furthermore, in order to achieve the overall movement and position locking of the mobile vehicle 1, such as... Figure 5 As shown, omnidirectional wheels are installed at the four corners of the bottom of the mobile trolley 1. Each omnidirectional wheel includes a connecting frame 2 located at the bottom of the mobile trolley 1. A rotatable wheel frame 22 is installed at the bottom of the connecting frame 2 via a bearing. A nylon roller 23 is installed inside the wheel frame 22. The rotation of the nylon roller 23 can drive the mobile trolley 1 to move. A stop plate 24 is also hinged to one side of the wheel frame 22. The stop plate 24 can rotate to contact the nylon roller 23. When the stop plate 24 contacts the nylon roller 23, it forms a limit on the nylon roller 23, thereby completing the position locking of the mobile trolley 1.

[0020] This invention uses a screw jack 5 to drive a belt 11 to apply pressure to the pipe under test, and an electronic scale 9 acts as a precision pressure sensor to measure the pressure applied to the pipe surface. This design allows for effective measurement under a wider range of pressure conditions. The electronic scale 9 monitors the pressure in real time and can be easily adjusted as needed, ensuring precise control and stability of the working process and reducing human error. An adjustable support plate 3 with replaceable height and shape is used. The shape of the platform's support surface can be changed according to different work requirements, ensuring the stability and accuracy of the workpiece. This overcomes the problems of instability and insufficient frequency response range of traditional support structures, and is suitable for composite material pipes of different sizes and material types, exhibiting good adaptability and scalability.

[0021] The casters can be used to change the direction of force application, support the overall running trajectory, ensure smooth operation, and drive other components, serving to steer or transmit tension. The slide rail 15 supports and guides the upright to move smoothly and accurately along a certain trajectory or direction. Through reasonable design, the slide rail 15 can withstand a large load, ensuring the stability of the loaded object during movement and preventing sinking or tilting. This device is flexible and can be adjusted according to specific needs to meet the requirements of different working environments. It can be used to test composite pipes of different lengths. The stop bolt 17 prevents the upright from exceeding the predetermined trajectory or position, limiting its range of movement. In this testing device, the stop bolt 17 serves as a safety device, preventing parts of the device from shifting due to excessive force or unstable operation, ensuring the accuracy and stability of the testing process.

[0022] The frame structure, used for supporting and fixing the device, provides stable support for the entire testing system. Made of metal or other robust materials, it can withstand a certain load and maintain the system's vertical position to ensure coordinated operation of all components. To accommodate different types of pipes, the support plate 3 is designed to be replaceable, allowing adjustment based on the shape, size, and material of different pipes. It is installed and disassembled using connecting bolts 21, improving work efficiency.

[0023] The belt 11 is used to transmit force between the pipe and the electronic scale 9. The belt 11 is made of elastic material and has a certain degree of extensibility and wear resistance. The electronic scale 9 is used to measure and monitor the response of the composite material pipe under pressure or tension. It can accurately measure the weight or load of the object and provide real-time data to analyze the stiffness characteristics of the pipe. The first hook 10 and the second hook 12 are used to hang the pipe and connect it to the belt 11 and the electronic scale 9 to maintain the stability of the pipe. The screw 8 in the screw jack 5 is used for precise pressure adjustment and to monitor the stress state of the pipe during the test. The vertical lifting of the screw 8 is controlled by the first handle 7, which can accurately control the speed and distance of the vertical lifting of the screw 8 without requiring a large amount of force to operate.

[0024] When using the force application device for testing the stiffness of composite pipes described in this utility model, first, ensure that all components are correctly installed and fixed. According to the type and length of the pipe to be tested, adjust the position of the two sets of uprights on the slide rail 15, and lock the uprights by rotating the stop bolt 17. After adjusting and replacing the support plate 3 that is compatible with the pipe, place the pipe to be tested in the slot 4, and hang the belt 11 on the outer circumference of the pipe. Adjust the height position of the screw 8 of the screw jack 5 to drive the belt 11 to apply pressure to the pipe. Adjust the applied force to the pipe according to the real-time display value of the electronic scale 9. Subsequently, use instruments to measure the degree of bending of the pipe and record the data to determine whether the degree of bending of the pipe under the specified pressure meets the strength requirements of the composite pipe.

[0025] This invention provides a force application device for testing the stiffness of composite material pipes, which has significant advantages such as accuracy, efficiency, automation, and non-destructive testing, avoiding the shortcomings of traditional methods. Its modular design provides strong adaptability, meeting the testing needs of pipes of different specifications and materials. Through non-destructive testing, multiple tests can be performed without damaging the pipe, improving the repeatability and safety of the test. In summary, this invention not only improves production efficiency and reduces costs, but also enhances the overall quality and safety of composite material pipes, possessing broad application prospects and market value.

[0026] The technical solution of this utility model is not limited to the scope of the embodiments described herein. All technical contents not described in detail herein are publicly known technologies.

Claims

1. A force application device for testing the stiffness of composite material pipes, characterized in that: The system includes a mobile trolley (1), on which are two sets of movable uprights that can move closer or further away. Each upright has a detachable support plate (3), and the support plate (3) has a slot (4) that matches the pipe. A screw jack (5) is installed on the mobile trolley (1) between the two sets of uprights. The housing of the screw jack (5) is fixed on the mobile trolley (1). A first handle (7) is installed at the end of the horizontally arranged worm gear (6) in the screw jack (5). A hanging block (25) is installed at the end of the vertically arranged screw (8). An electronic scale (9) is also provided between the hanging block (25) and the pipe to be tested. One end of the electronic scale (9) is connected to a belt (11) through a first hook (10), and the other end of the electronic scale (9) is connected to the hanging block (25) through a second hook (12). The belt (11) can be hung on the pipe to be tested. When the screw (8) moves down, it can drive the belt (11) to pull down the pipe to be tested and measure the applied pulling force through the electronic scale (9).

2. The force application device for testing the stiffness of composite material pipes according to claim 1, characterized in that: The support frame includes a base plate (26) and a top plate (13), and several vertically arranged columns (14) are connected between the base plate (26) and the top plate (13). The base plate (26) can move on the moving trolley (1), and the top plate (13) is provided with a detachable support plate (3).

3. The force application device for testing the stiffness of composite material pipes according to claim 2, characterized in that: The mobile trolley (1) is equipped with two slide rails (15) arranged along the length direction. The bottom of the base plate (26) is provided with a slider (16) that cooperates with the slide rail (15). A threaded hole is also provided on the base plate (26). A stop bolt (17) is installed in the threaded hole. A second handle (18) is provided at one end of the stop bolt (17) that extends upward through the base plate (26). A friction block (19) is provided at one end of the stop bolt (17) that extends downward through the base plate (26). The slide rail (15) is a horizontally arranged cylindrical rod. The bottom of the cylindrical rod is connected to the mobile trolley (1). Each slider (16) is provided with a cylindrical groove that cooperates with the cylindrical rod. The bottom of the cylindrical groove is open. After the friction block (19) contacts the mobile trolley (1), the cylindrical groove can restrict the vertical movement of the slider (16) relative to the slide rail (15).

4. The force application device for testing the stiffness of composite material pipes according to claim 2, characterized in that: A folding plate (20) is provided on one side of the two top plates (13) that are close to each other. The support plate (3) is installed on the folding plate (20) by connecting bolts (21). A groove is provided on the support plate (3) to cooperate with the connecting bolts (21).

5. The force application device for testing the stiffness of composite material pipes according to claim 1, characterized in that: The four corners of the bottom of the mobile trolley (1) are equipped with casters. Each caster includes a connecting frame (2) set at the bottom of the mobile trolley (1). A rotatable wheel frame (22) is installed at the bottom of the connecting frame (2) through a bearing. A nylon roller (23) is installed inside the wheel frame (22). A stop plate (24) is also hinged to one side of the wheel frame (22). The stop plate (24) can rotate to contact the nylon roller (23).

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