A bending durability test mechanism and test system

Abstract

The utility model relates to a kind of bending durability test mechanism and test system, test mechanism includes upper and lower relative arrangement upper water channel block and lower water channel block, transverse side-by-side arrangement and two ends are connected with upper water channel block and lower water channel block respectively several simulation blood vessels, and set in the swing disc of upper water channel block end;Simulation blood vessel is provided with curvature tool on one side, curvature tool is provided with curvature groove corresponding with simulation blood vessel one-to-one cooperation;Swing disc drives upper water channel block rotation, drives simulation blood vessel to bend in corresponding curvature groove adhering. The utility model not only can avoid radial impact to test sample, and curvature groove will form radial wrapping and axial support to simulation blood vessel, prevent test sample from appearing deformation or damage condition, accurate control test sample bending angle can also be guaranteed simultaneously, the accuracy of test result.

Description

Technical Field

[0001] This utility model belongs to the field of fatigue testing machinery technology, specifically relating to a bending durability testing mechanism and testing system. Background Technology

[0002] Cardiovascular and cerebrovascular diseases are a collective term for diseases of the heart and brain blood vessels. They broadly refer to ischemic or hemorrhagic diseases of the heart, brain, and other tissues caused by conditions such as hyperlipidemia, high blood viscosity, atherosclerosis, and hypertension. Worldwide, up to 15 million people die from cardiovascular and cerebrovascular diseases each year, making it the leading cause of death. Therefore, the significance of researching vascular stents is evident. Currently, vascular stent intervention surgery is the main treatment for cardiovascular diseases, and the performance of the vascular stent is a crucial factor determining the surgical outcome. Before being put into use, vascular stents need to undergo in vitro simulation of their bending fatigue performance; that is, the lifespan of vascular stents with different structures (hereinafter referred to as test samples) in the human body is predicted through simulation test results.

[0003] Existing bending durability testing equipment uses a drive fixture to radially push the middle of a simulated blood vessel, causing the test sample inside the simulated blood vessel to bend. This pushing method is prone to damaging the test sample and cannot precisely control the bending angle of the test sample, thus affecting the accuracy of the test results. Utility Model Content

[0004] The purpose of this invention is to provide a bending durability testing mechanism and system to solve the problem of poor test result accuracy.

[0005] The bending durability testing mechanism of this utility model is implemented as follows:

[0006] A bending durability testing mechanism includes an upper waterway block and a lower waterway block arranged opposite each other at the top and bottom, a plurality of simulated blood vessels arranged side by side laterally and connected at both ends to the upper waterway block and the lower waterway block respectively, and a swing disk disposed at the end of the upper waterway block.

[0007] A curvature fixture is provided on one side of the simulated blood vessel, and the curvature fixture is provided with curvature grooves that correspond one-to-one with the simulated blood vessel.

[0008] When the oscillating disc drives the upper waterway block to rotate, it causes the simulated blood vessel to bend and conform to the corresponding curvature groove.

[0009] Furthermore, the curvature fixture includes curvature blocks arranged horizontally side by side and corresponding one-to-one with the simulated blood vessels. The curvature grooves are correspondingly disposed on the side of each curvature block facing the simulated blood vessel, and the simulated blood vessel is located in the curvature groove corresponding to it.

[0010] Furthermore, the curvature groove is an arc-shaped groove with an outwardly expanding opening;

[0011] The depth of the curvature groove is greater than the diameter of the simulated blood vessel.

[0012] Furthermore, two oscillating discs are provided and are respectively located at both ends of the water supply block;

[0013] A lever connects the two oscillating discs.

[0014] Furthermore, the swing disk is provided with a plurality of adjustment holes arranged in its radial direction, and the two ends of the water channel block are installed on the corresponding adjustment holes.

[0015] Furthermore, the upper waterway block is provided with a waterway hole, and the upper end of the simulated blood vessel is connected to the waterway hole;

[0016] The sewer block is provided with two water storage chambers arranged side by side, and the lower end of the simulated blood vessel is connected to the corresponding water storage chamber;

[0017] The two water storage chambers are connected by a circulating water pipe;

[0018] A circulating water pump is installed on the circulating water pipe;

[0019] A heating plate is installed on the sewer block at the bottom of the water storage chamber.

[0020] Furthermore, the sewer block is mounted on the base, and the swing disk is rotatably mounted on the vertical plate of the base;

[0021] A locking pin is installed on the upright plate, and multiple locking holes are provided on the swing disk. The locking pin can pass through the upright plate and extend into the corresponding locking hole.

[0022] In addition, this utility model also provides a bending durability testing system, including

[0023] Testing agency,

[0024] A drive mechanism located at one end of the testing mechanism to drive its oscillating disk to rotate.

[0025] A camera is positioned at the other end of the testing mechanism, opposite to the simulated blood vessel area fitted onto the curvature fixture.

[0026] And a liquid supply and replenishment mechanism connected to the testing mechanism.

[0027] Furthermore, a hollow swing shaft is provided at the center of the swing disk at the end where the camera is located, and the lens of the camera is opposite to the simulated blood vessel through the shaft hole of the hollow swing shaft.

[0028] A solid pendulum shaft is located at the center of the oscillating disk at the end of the drive mechanism, and the solid pendulum shaft is connected to the output end of the drive mechanism.

[0029] Furthermore, the driving mechanism includes a driving box disposed at one end of the base of the testing mechanism, and a driving motor disposed inside the driving box and whose output shaft is connected to the oscillating disk;

[0030] The liquid supply and replenishment mechanism includes a liquid supply and replenishment tank located above the drive box, and the liquid supply and replenishment tank is connected to the circulating water pipe of the test mechanism through a replenishment pipe.

[0031] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0032] (1) In the testing mechanism of this utility model, each simulated blood vessel is arranged horizontally side by side, which not only facilitates the installation of the test sample, but also makes it easy to observe the condition of the test sample.

[0033] (2) In the testing mechanism of this utility model, the lower end of the simulated blood vessel is fixed, and the upper end moves in an arc under the action of the swinging disc, so that the part of the simulated blood vessel where the test sample is placed is bent in accordance with the corresponding curvature groove. This not only avoids radial impact on the test sample, but also the curvature groove forms radial wrapping and axial support for the simulated blood vessel, preventing the test sample from being deformed or damaged. At the same time, it can also accurately control the bending angle of the test sample to ensure the accuracy of the test results. Attached Figure Description

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Figure 1 This is a first-view structural diagram of the bending durability testing mechanism of a preferred embodiment of the present invention;

[0036] Figure 2 This is a structural diagram of the bending durability testing mechanism of a preferred embodiment of the present invention from a second perspective.

[0037] Figure 3 This is a top view of the bending durability testing mechanism of a preferred embodiment of the present invention;

[0038] Figure 4 yes Figure 3 Cross-sectional view along the AA direction;

[0039] Figure 5 This is a structural diagram of a preferred embodiment of the bending durability testing mechanism of this utility model (without base, circulating water pump and circulating water pipe);

[0040] Figure 6This is a structural diagram of the curvature fixture of the bending durability testing mechanism according to a preferred embodiment of the present invention;

[0041] Figure 7 This is a first-view structural diagram of the bending durability testing system of a preferred embodiment of the present invention;

[0042] Figure 8 This is a structural diagram from a second perspective of the bending durability testing system of a preferred embodiment of this utility model;

[0043] Figure 9 This is a structural diagram of the bending durability testing system (with the drive box open) according to a preferred embodiment of the present invention;

[0044] In the diagram: Test mechanism 1, upper waterway block 1-1, lower waterway block 1-2, simulated blood vessel 1-3, swinging disc 1-4, outer ring 1-4-1, inner ring 1-4-2, connecting plate 1-4-3, curvature fixture 1-5, curvature groove 1-5-1, curvature block 1-5-2, mounting plate 1-5-3, connecting plate 1-5-4, disc pull rod 1-6, adjusting hole 1-7, mounting hole 1-8, waterway hole 1-9, plug 1-10, air vent valve 1-11, water storage. Cavity 1-12, circulating water pipe 1-13, circulating water pump 1-14, heating plate 1-15, temperature sensor 1-16, base 1-17, upright plate 1-17-1, bottom plate 1-17-2, bearing 1-18, locking pin 1-19, locking hole 1-20, hollow swing shaft 1-21, solid swing shaft 1-22, drive mechanism 2, drive box 2-1, drive motor 2-2, camera 3, liquid supply and replenishment mechanism 4, liquid supply and replenishment tank 4-1, replenishment pipe 4-2. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0046] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0047] like Figure 1-6As shown, a bending durability testing mechanism includes an upper waterway block 1-1 and a lower waterway block 1-2 arranged opposite each other, several simulated blood vessels 1-3 arranged laterally and connected to the upper waterway block 1-1 and the lower waterway block 1-2 at both ends respectively, and a swing disk 1-4 disposed at the end of the upper waterway block 1-1; a curvature fixture 1-5 is disposed on one side of the simulated blood vessel 1-3, and a curvature groove 1-5-1 is disposed on the curvature fixture 1-5 corresponding to the simulated blood vessel 1-3; when the swing disk 1-4 drives the upper waterway block 1-1 to rotate, it drives the simulated blood vessel 1-3 to bend and conform to the corresponding curvature groove 1-5-1.

[0048] The upper waterway block 1-1, simulated blood vessels 1-3, and lower waterway block 1-2 form an internal circulation pathway simulating the physiological environment of the human body. The test sample is placed inside the simulated blood vessel 1-3 and positioned to match the corresponding curvature groove 1-5-1. The lower end of the simulated blood vessel 1-3 is connected to and fixed to the lower waterway block 1-2, while the upper end is connected to the upper waterway block 1-1. Driving the oscillating disk 1-4 to rotate causes the upper waterway block 1-1 to move along the circumference of the oscillating disk 1-4, thereby causing the upper ends of multiple simulated blood vessels 1-3 to move along a circumference parallel to the oscillating disk 1-4. Consequently, the simulated blood vessels 1-3 bend within the corresponding curvature groove 1-5-1, thus enabling the test sample inside the simulated blood vessel 1-3 to undergo a bending test.

[0049] The curvature fixture 1-5 includes curvature blocks 1-5-2 arranged horizontally side by side and corresponding one-to-one with the simulated blood vessels 1-3. Curvature grooves 1-5-1 are respectively set on the side of each curvature block 1-5-2 facing the simulated blood vessels 1-3, and the simulated blood vessels 1-3 are located in the corresponding curvature grooves 1-5-1.

[0050] The curvature fixture 1-5 is configured as multiple individual curvature blocks 1-5-2 corresponding one-to-one with the simulated blood vessel 1-3. When a certain curvature block 1-5-2 is damaged, it can be replaced individually, reducing the usage cost of the testing mechanism 1.

[0051] Alternatively, the curvature block 1-5-2 can be set as an integral structure, that is, a curvature groove 1-5-1 corresponding to the simulated blood vessel 1-3 can be set on the side of the curvature block 1-5-2 facing the simulated blood vessel 1-3.

[0052] In this embodiment, the curvature fixture 1-5 also includes a mounting plate 1-5-3 fixed above the sewer block 1-2, and the curvature block 1-5-2 is installed horizontally side by side on the top of the mounting plate 1-5-3.

[0053] Specifically, the bottom of the curvature block 1-5-2 is provided with a downwardly extending connecting plate 1-5-4, so that the bottom of the curvature block 1-5-2 forms a T-shaped structure. The connecting plate 1-5-4 is attached to the front side (this is the position in this embodiment) or the rear side of the mounting plate 1-5-3, and then the connecting plate 1-5-4 and the mounting plate 1-5-3 are fixed with screws.

[0054] This assembly method allows the bottom surface of the curvature block 1-5-2 to be supported on the top of the mounting plate 1-5-3, thereby positioning the height of the curvature block 1-5-2, ensuring that the height of each curvature block 1-5-2 is uniform, and increasing the stability of the installation of the curvature block 1-5-2.

[0055] In addition, since the curvature required for different test samples is not exactly the same, a curvature block 1-5-2 with a corresponding curvature groove 1-5-1 can be selected according to the needs of the test sample and assembled onto the mounting plate 1-5-3, which effectively increases the versatility of the test mechanism 1.

[0056] In order for the simulated blood vessel 1-3 to be smoothly embedded in the curvature groove 1-5-1 when bending, the curvature groove 1-5-1 is an arc-shaped groove with an outward opening.

[0057] The outward-expanding opening structure of the curvature groove 1-5-1 can prevent damage to the simulated blood vessel 1-3 when it is placed inside the curvature groove 1-5-1 and bent.

[0058] The curvature groove 1-5-1 is located on the side of the curvature block 1-5-2 facing the simulated blood vessel 1-3, and its upper end extends to the top of the curvature block 1-5-2. The curvature of the curvature groove 1-5-1 can be selected or set according to the needs of the test sample.

[0059] To ensure that the simulated blood vessel 1-3 can be well enclosed, the depth of the curvature groove 1-5-1 is greater than the diameter of the simulated blood vessel 1-3.

[0060] When simulating blood vessel 1-3 bending, it can fit more stably within the corresponding curvature groove 1-5-1, preventing the simulated blood vessel 1-3 from detaching from the curvature groove 1-5-1, thus ensuring the stability of the testing process and the accuracy of the test results.

[0061] To ensure the stability of the upper waterway block 1-1 and the upper end of the simulated blood vessel 1-3 during rotation, two swing disks 1-4 are provided, one at each end of the upper waterway block 1-1.

[0062] Preferably, in order to reduce the weight of the entire oscillating disk 1-4, the oscillating disk 1-4 includes an outer ring 1-4-1, an inner ring 1-4-2 arranged concentrically with the outer ring 1-4-1, and a connecting plate 1-4-3 connecting the outer ring 1-4-1 and the inner ring 1-4-2.

[0063] The end of the water supply block 1-1 is installed at the radial position of one of the connecting plates 1-4-3.

[0064] To ensure the stability of the connection between the two oscillating disks 1-4 and the synchronization during rotation, a disk tie rod 1-6 is connected between the two oscillating disks 1-4.

[0065] Specifically, the two ends of the disc rod 1-6 are respectively installed on the outer ring 1-4-1 of the two swing discs 1-4.

[0066] The height adjustment device of the existing bending test equipment is mostly located at the top of the entire equipment, which is too high. This not only makes the structure complex and difficult to maintain and repair, but also poses a great safety hazard. In order to solve this technical problem, the swing disk 1-4 is provided with multiple adjustment holes 1-7 arranged in its radial direction, and the two ends of the water channel block 1-1 are installed on the corresponding adjustment holes 1-7.

[0067] Since the required lengths of the simulated blood vessels 1-3 are not exactly the same for different test samples, the distance between the upper waterway block 1-1 and the lower waterway block 1-2 can be adjusted by changing the position of the upper waterway block 1-1, so as to accommodate the installation of simulated blood vessels 1-3 of different lengths.

[0068] In this embodiment, the adjustment hole 1-7 is located on one of the connecting plates 1-4-3 of the swing disk 1-4, and the end of the water channel block 1-1 is provided with a mounting hole 1-8. The mounting hole 1-8 is aligned with the corresponding adjustment hole 1-7, and the two are connected by bolts to fix the water channel block 1-1.

[0069] Preferably, the mounting holes 1-8 are provided with at least two holes and are arranged vertically. When the end of the water supply block 1-1 is connected to the swing disk 1-4, it can be fixed by at least two bolts, thereby ensuring the firmness of the installation of the water supply block 1-1.

[0070] The internal circulation pathway is equipped with a circulating test liquid. In order to connect the simulated blood vessel 1-3 and the upper waterway block 1-1 to form a flow channel, a waterway hole 1-9 is provided in the upper waterway block 1-1, and the upper end of the simulated blood vessel 1-3 is connected to the waterway hole 1-9.

[0071] Specifically, the water channel hole 1-9 extends horizontally through the entire upper water channel block 1-1, and its two ends are sealed by plugs 1-10 to prevent test liquid from leaking from both ends of the water channel hole 1-9. The upper end of the simulated blood vessel 1-3 is connected to the upper water channel block 1-1 by threads, and the interior of the simulated blood vessel 1-3 is connected to the upper water channel hole 1-9.

[0072] Preferably, the top of the upper waterway block 1-1 is provided with an exhaust valve 1-11 corresponding to each simulated blood vessel 1-3.

[0073] In order to form a flow channel between the simulated blood vessel 1-3 and the sewer block 1-2, two water storage chambers 1-12 are arranged side by side in the sewer block 1-2, and the lower end of the simulated blood vessel 1-3 is connected to the corresponding water storage chamber 1-12.

[0074] Among them, two water storage chambers 1-12 are arranged side by side, and the lower end of the simulated blood vessel 1-3 is threadedly engaged with the sewer block 1-2, and their interiors are respectively connected to the corresponding water storage chambers 1-12.

[0075] In order to form a circulating flow channel by water channel hole 1-9, simulated blood vessel 1-3 and two water storage chambers 1-12 in the water channel block 1-1, the two water storage chambers 1-12 are connected by circulating water pipe 1-13.

[0076] In this embodiment, the rear side of the sewer block 1-2 is provided with a water pipe connector that is connected to the two water storage chambers 1-12 respectively, and the two ends of the circulating water pipe 1-13 are connected to the two water pipe connectors respectively.

[0077] In order to provide the power for the flow of the test liquid in the internal circulation path, a circulating water pump 1-14 is installed on the circulating water pipe 1-13.

[0078] During the test, the test liquid flows into the right-side water storage chamber 1-12 under the power of the circulating water pump 1-14. Then, the test liquid flows upward through the simulated blood vessel 1-3, which is connected to the water storage chamber 1-12, and enters the upper water channel hole 1-9. The test liquid then flows downward through the upper water channel hole 1-9 into the simulated blood vessel 1-3, which is connected to the left-side water storage chamber 1-12, and enters the left-side water storage chamber 1-12. Finally, it enters the circulating water pump 1-14 again through the circulating water pipe 1-13 to carry out the next cycle. The entire flow process of the test liquid forms the internal circulation process of the test mechanism 1.

[0079] In order to closely simulate the human body temperature environment and improve the accuracy of test results, a heating plate 1-15 is installed on the sewer block 1-2 at the bottom of the water storage chamber 1-12.

[0080] The heating plate 1-15 is located at the bottom of the water storage chamber 1-12, near the bottom of the sewer block 1-2, and is used to heat the test liquid in the two water storage chambers 1-12.

[0081] Preferably, each water storage chamber 1-12 is equipped with a temperature sensor 1-16 to detect the temperature change of the test liquid in the water storage chamber 1-12 in real time, so as to adjust the temperature in real time.

[0082] In this embodiment, the temperature sensors 1-16 corresponding to the two water storage chambers 1-12 are located on the rear side of the sewer block 1-2.

[0083] To facilitate the installation and fixation of the testing machine, the sewer block 1-2 is installed on the base 1-17, and the swing disc 1-4 is rotatably installed on the vertical plate 1-17-1 of the base 1-17.

[0084] Specifically, the base 1-17 includes a base plate 1-17-2 with feet at the bottom, and two upright plates 1-17-1 mounted on the base plate 1-17-2. Two swing discs 1-4 are rotatably mounted on opposite sides of the two upright plates 1-17-1 via bearings 1-18.

[0085] After the simulated blood vessel 1-3 is bent into place, a locking pin 1-19 is installed on the upright plate 1-17-1 to fix its bent state. The swing disk 1-4 is provided with multiple locking holes 1-20. The locking pin 1-19 can pass through the upright plate 1-17-1 and extend into the corresponding locking hole 1-20.

[0086] Locking holes 1-20 are located on the outer ring 1-4-1 of at least one swing disk 1-4. Locking pins 1-19 are installed on the corresponding upright plates 1-17-1 by means of threaded engagement. When it is necessary to position the swing disk 1-4, the locking pins 1-19 are rotated inward so that their inner ends extend into the corresponding locking holes 1-20, thereby fixing the positions of the swing disk 1-4, the waterway block 1-1, and the simulated blood vessels 1-3.

[0087] like Figure 7-9 As shown, this embodiment also provides a bending durability testing system based on the above-mentioned testing mechanism 1, including the above-mentioned testing mechanism 1, a drive mechanism 2 disposed at one end of the testing mechanism 1 and used to drive its swing disk 1-4 to rotate, a camera 3 disposed at the other end of the testing mechanism 1 and opposite to the simulated blood vessel 1-3 part that is fitted at the curvature tooling 1-5, and a liquid supply and replenishment mechanism 4 connected to the testing mechanism 1.

[0088] The drive mechanism 2 provides rotational power to the test mechanism 1, that is, to drive the upper end of the swing disk 1-4, the upper water channel block 1-1 and the simulated blood vessel 1-3 to rotate, so that the simulated blood vessel 1-3 bends to the angle required for testing; the camera 3 is used to record the test status of the test sample in the simulated blood vessel 1-3; the liquid supply and replenishment mechanism 4 is used to provide test liquid to the internal circulation passage of the test mechanism 1.

[0089] Of the two swing disks 1-4 at both ends of the water supply block 1-1, one is connected to the drive mechanism 2 to rotate it, while the other is opposite to the camera 3 to record the test situation.

[0090] Specifically, in order to facilitate recording by camera 3, a hollow swing shaft 1-21 is set at the center of the swing disk 1-4 at the end where camera 3 is located, and the lens of camera 3 is opposite to the simulated blood vessel 1-3 through the shaft hole of the hollow swing shaft 1-21.

[0091] In this embodiment, a hollow pendulum shaft 1-21 is provided on the outer side of the inner ring 1-4-2 of the right-side pendulum disk 1-4. The hollow pendulum shaft 1-21 is mounted on the right-side upright plate 1-17-1 via a bearing 1-18. The camera 3 is located on the outer side of the upright plate 1-17-1, with its lens passing through the shaft hole of the hollow pendulum shaft 1-21 and positioned opposite the location where the test sample is placed on the simulated blood vessel 1-3, thereby using the camera 3 to record the test status of the test sample in real time.

[0092] In order to use the drive mechanism 2 to drive the corresponding swing disk 1-4 to rotate, a solid swing shaft 1-22 is set at the center of the swing disk 1-4 at the end where the drive mechanism 2 is located. The solid swing shaft 1-22 is connected to the output end of the drive mechanism 2.

[0093] In this embodiment, a solid pendulum shaft 1-22 is provided on the outer side of the inner ring 1-4-2 of the left-side pendulum disk 1-4. The solid pendulum shaft 1-22 is rotatably mounted on the left-side upright plate 1-17-1 via bearing 1-18. The outer end of the solid pendulum shaft 1-22 is connected to the output end of the drive mechanism 2, so that the left-side pendulum disk 1-4, the right-side pendulum disk 1-4, the upper waterway block 1-1, and the upper end of the simulated blood vessel 1-3 can be driven to rotate synchronously through the drive mechanism 2.

[0094] In order to provide driving force to the test mechanism 1, the drive mechanism 2 includes a drive box 2-1 disposed at one end of the base 1-17 of the test mechanism 1, and a drive motor 2-2 disposed inside the drive box 2-1 and whose output shaft is connected to the swing disk 1-4.

[0095] The drive box 2-1 is located outside the left upright plate 1-17-1 and on the bottom plate 1-17-2 of the base 1-17. The drive motor 2-2 is located inside the drive box 2-1 to facilitate transmission connection with the left swing disk 1-4.

[0096] To improve the compactness of the entire test system structure, the liquid supply and replenishment mechanism 4 includes a liquid supply and replenishment tank 4-1 located above the drive box 2-1. The liquid supply and replenishment tank 4-1 is connected to the circulating water pipe 1-13 of the test mechanism 1 through a replenishment pipe 4-2.

[0097] The bottom rear side of the replenishment tank is provided with a liquid outlet, and a replenishment pipe 4-2 is connected to the liquid outlet. The other end of the replenishment pipe 4-2 is connected to the circulating water pipe 1-13 through a three-way valve, so as to send or replenish the test liquid into the internal circulation passage of the test mechanism 1.

[0098] The bending durability testing mechanism 1 and testing system disclosed in this utility model have the following advantages:

[0099] (1) The test station, namely each simulated blood vessel 1-3, is arranged in a horizontal side-by-side manner, which makes it easier to operate, namely the loading and unloading of test samples;

[0100] (2) The design of the curvature fixture 1-5 and its cooperation with the simulated blood vessel 1-3 can form a radial wrapping and axial support for the simulated blood vessel 1-3, preventing the test sample inside the simulated blood vessel 1-3 from being flattened, folded or even broken, thereby better protecting the test sample, reducing damage to the test sample, and ensuring the efficiency and accuracy of the test results.

[0101] (3) The horizontal side-by-side arrangement of the test station and the design of the hollow rotating shaft make it easy to assemble a camera 3 at one end of the test mechanism 1, so as to facilitate the observation and recording of the test process of the test sample, so as to facilitate the subsequent research and improvement of the test sample.

[0102] (4) The test system uses the drive mechanism 2 to drive the upper end of the simulated blood vessel 1-3 to rotate. The bending angle of the test sample in the simulated blood vessel 1-3 can be controlled by controlling the rotation angle of the drive mechanism 2. There is no need to use complex mathematical relationships such as functions to convert between displacement and angle. This not only ensures the accuracy of the test parameters, but also reduces the complexity of the test process.

[0103] (5) By swinging the disc 1-4, the upper end of the waterway block 1-1 and the simulated blood vessel 1-3 are rotated, which optimizes the mass distribution, reduces the mass eccentricity, reduces the vibration of the equipment during the rotation of the drive mechanism 2, and reduces the impact on the test mechanism 1 and the test sample due to excessive inertia during the reversal of the drive mechanism 2, thereby reducing the probability of damage to the test sample and ensuring the accuracy of the test results.

[0104] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A bending durability testing mechanism, characterized in that, It includes an upper waterway block (1-1) and a lower waterway block (1-2) arranged opposite each other, several simulated blood vessels (1-3) arranged side by side in the horizontal direction and connected at both ends to the upper waterway block (1-1) and the lower waterway block (1-2) respectively, and a swing disk (1-4) set at the end of the upper waterway block (1-1); A curvature fixture (1-5) is provided on one side of the simulated blood vessel (1-3), and the curvature fixture (1-5) is provided with curvature grooves (1-5-1) that correspond one-to-one with the simulated blood vessel (1-3). When the swing disk (1-4) drives the upper waterway block (1-1) to rotate, it causes the simulated blood vessel (1-3) to bend and conform to the corresponding curvature groove (1-5-1).

2. The bending durability testing mechanism according to claim 1, characterized in that, The curvature fixture (1-5) includes curvature blocks (1-5-2) arranged horizontally side by side and corresponding one-to-one with the simulated blood vessels (1-3). The curvature grooves (1-5-1) are respectively set on the side of each curvature block (1-5-2) facing the simulated blood vessel (1-3), and the simulated blood vessel (1-3) is located in the curvature groove (1-5-1) corresponding to it.

3. The bending durability testing mechanism according to claim 1, characterized in that, The curvature groove (1-5-1) is an arc-shaped groove with an outwardly expanding opening; The depth of the curvature groove (1-5-1) is greater than the diameter of the simulated blood vessel (1-3).

4. The bending durability testing mechanism according to claim 1, characterized in that, Two swing disks (1-4) are provided and are respectively located at both ends of the upper waterway block (1-1); A disc rod (1-6) connects the two oscillating discs (1-4).

5. The bending durability testing mechanism according to claim 1, characterized in that, The swing disk (1-4) is provided with a plurality of adjustment holes (1-7) arranged in its radial direction, and the two ends of the upper water channel block (1-1) are installed on the corresponding adjustment holes (1-7).

6. The bending durability testing mechanism according to claim 1, characterized in that, The upper waterway block (1-1) is provided with a waterway hole (1-9), and the upper end of the simulated blood vessel (1-3) is connected to the waterway hole (1-9); The sewer block (1-2) is provided with two water storage chambers (1-12) arranged side by side, and the lower end of the simulated blood vessel (1-3) is connected to the corresponding water storage chamber (1-12); The two water storage chambers (1-12) are connected by a circulating water pipe (1-13); A circulating water pump (1-14) is installed on the circulating water pipe (1-13); A heating plate (1-15) is provided on the sewer block (1-2) at the bottom of the water storage chamber (1-12).

7. The bending durability testing mechanism according to claim 1, characterized in that, The sewer block (1-2) is installed on the base (1-17), and the swing disk (1-4) is rotatably installed on the vertical plate (1-17-1) of the base (1-17); A locking pin (1-19) is installed on the upright plate (1-17-1), and a plurality of locking holes (1-20) are provided on the swing disk (1-4). The locking pin (1-19) can pass through the upright plate (1-17-1) and extend into the corresponding locking hole (1-20).

8. A bending durability testing system, characterized in that, include The testing apparatus (1) as described in any one of claims 1-7, A drive mechanism (2) is set at one end of the testing mechanism (1) and is used to drive its swing disk (1-4) to rotate. A camera (3) is positioned at the other end of the testing mechanism (1) and opposite to the simulated blood vessel (1-3) located at the curvature fixture (1-5). And a liquid supply and replenishment mechanism (4) connected to the test mechanism (1).

9. The bending durability testing system according to claim 8, characterized in that, A hollow swing shaft (1-21) is provided at the center of the swing disk (1-4) at the end where the camera (3) is located. The lens of the camera (3) is opposite to the simulated blood vessel (1-3) through the shaft hole of the hollow swing shaft (1-21). A solid pendulum shaft (1-22) is provided at the center of the oscillating disk (1-4) at the end of the drive mechanism (2), and the solid pendulum shaft (1-22) is connected to the output end of the drive mechanism (2).

10. The bending durability testing system according to claim 8, characterized in that, The drive mechanism (2) includes a drive box (2-1) disposed at one end of the base (1-17) of the test mechanism (1), and a drive motor (2-2) disposed in the drive box (2-1) and whose output shaft is connected to the swing disk (1-4); The liquid supply and replenishment mechanism (4) includes a liquid supply and replenishment tank (4-1) disposed above the drive box (2-1), and the liquid supply and replenishment tank (4-1) is connected to the circulating water pipe (1-13) of the test mechanism (1) through a replenishment pipe (4-2).

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