CN115541404A - Cardiovascular implant fatigue testing machine - Google Patents
Cardiovascular implant fatigue testing machine Download PDFInfo
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- CN115541404A CN115541404A CN202211545941.4A CN202211545941A CN115541404A CN 115541404 A CN115541404 A CN 115541404A CN 202211545941 A CN202211545941 A CN 202211545941A CN 115541404 A CN115541404 A CN 115541404A
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- liquid inlet
- hole
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/02—Branch units, e.g. made in one piece, welded, riveted
- F16L41/03—Branch units, e.g. made in one piece, welded, riveted comprising junction pieces for four or more pipe members
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
Abstract
The invention relates to a cardiovascular implant fatigue testing machine, which comprises a testing component and a driving component, wherein the testing component comprises two flange plates which are oppositely arranged and at least two groups of simulated blood vessels which are connected between the two flange plates, a liquid inlet cavity which is correspondingly communicated with each group of simulated blood vessels is arranged in each flange plate, and the two adjacent liquid inlet cavities are communicated or separated by an adjusting device; the drive assembly is arranged on the back sides of the two flange plates and comprises a motor and a corrugated pipe which is connected with the motor and correspondingly communicated with the liquid inlet cavity. According to the invention, by arranging the plurality of independent circulating systems, when one circulating system is abnormal, the circulating system can be maintained or the samples can be replaced under the condition that the test of other circulating systems is not influenced, so that the test effect is ensured, and the test efficiency is effectively improved.
Description
Technical Field
The invention belongs to the technical field of fatigue test devices, and particularly relates to a fatigue tester for a cardiovascular implant.
Background
Before cardiovascular implants such as artificial heart valves, blood vessel stents and the like are put into use, the service life of the implants needs to be evaluated, and in-vitro testing of a fatigue testing machine is an important evaluation means.
The existing fatigue testing machines for in-vitro testing of heart stents (hereinafter referred to as samples), such as SGT series products marketed by electro force Systems Group, can usually realize simultaneous detection of 6-12 samples in the experimental process. When a certain sample has a problem or a certain sample causes test errors, the whole testing machine needs to be stopped so as to be convenient for replacing the sample. However, the whole test process consumes a long time, and once the sample is replaced midway, the test data collected in the previous test may fail, so that the test time is directly increased, and the test efficiency is influenced.
Disclosure of Invention
The invention aims to provide a cardiovascular implant fatigue testing machine to solve the problem of low testing efficiency.
The fatigue testing machine for the cardiovascular implant is realized by the following steps:
a fatigue tester for cardiovascular implant comprises
The test assembly comprises two flanges which are oppositely arranged and at least two groups of simulated blood vessels which are connected between the two flanges, wherein liquid inlet cavities which are correspondingly communicated with the groups of simulated blood vessels are arranged in the flanges, and the adjacent two liquid inlet cavities are communicated or separated through an adjusting device;
and the driving assembly is arranged on the back sides of the two flange plates and comprises a motor and a corrugated pipe which is connected with the motor and is correspondingly communicated with the liquid inlet cavity.
Furthermore, a plurality of liquid inlet holes communicated with the liquid inlet cavity are formed in the outer side of the liquid inlet cavity, and the simulated blood vessels in the same group are correspondingly connected with the liquid inlet holes in the outer side of the same liquid inlet cavity;
the liquid inlet hole is positioned in the radial direction of the flange plate, and a liquid inlet joint is arranged at the outer end of the liquid inlet hole;
and a simulated blood vessel joint which is positioned on the inner side surface of the flange plate and is used for connecting a simulated blood vessel is arranged on the liquid inlet hole.
Furthermore, the adjusting device is an adjusting rod which is arranged in the flange plate and can rotate;
a communicating hole is arranged between two adjacent liquid inlet cavities, the adjusting rod penetrates through the communicating hole in the direction perpendicular to the communicating hole, and a through hole penetrating through the adjusting rod in the radial direction is arranged at the position of the adjusting rod at the communicating hole;
the adjusting rod is arranged in the radial direction of the flange plate, and an adjusting notch is formed in the outer end of the adjusting rod.
Further, a connecting pipe is arranged between the two flange plates, and the simulated blood vessel is arranged around the connecting pipe.
Furthermore, the driving assembly further comprises a thrust base, the outer end of the corrugated pipe is fixed to the thrust base, and the thrust base is connected with the motor.
Furthermore, the driving assembly further comprises a housing fixed on the outer side surface of the flange plate, the corrugated pipe is arranged in the housing, the motor is installed on the outer side of the housing, and an output shaft of the motor penetrates through an end plate of the housing to be connected with a thrust seat in the housing.
Furthermore, an elastic sheet positioned in the housing is arranged on the outer side of the thrust seat, and a thrust seat stud positioned on the outer side surface of the thrust seat penetrates through a central hole of the elastic sheet to be connected with an output shaft of the motor;
the shell fragment is provided with two and is the cross arrangement.
Furthermore, an installation groove is formed in the inner wall of the housing, and two ends of the elastic sheet are assembled in the installation groove;
the outer wall of the housing is provided with reinforcing ribs which correspond to the mounting grooves and protrude outwards.
Further, still include the base subassembly, the base subassembly includes the base, can swing about on the base swing seat, and can move about on the swing seat two U type seats, the U type seat is fixed respectively in the bottom of two ring flanges.
Furthermore, two side walls of the swinging seat are respectively provided with a concave arc-shaped hole, two side walls of the base are respectively positioned at the outer sides of two side walls of the swinging seat, and the inner wall of the base is provided with a bolt assembled in the arc-shaped hole;
a transverse sliding rail is arranged on a top plate of the swinging seat, and a sliding block which is in sliding fit with the sliding rail is arranged at the bottom of the U-shaped seat.
After the technical scheme is adopted, the invention has the beneficial effects that:
according to the invention, a plurality of groups of simulated blood vessels and a plurality of liquid inlet cavities correspondingly matched with the simulated blood vessels are arranged to form a plurality of independent circulating systems, when one circulating system is abnormal, the circulating system can be maintained or a sample can be replaced under the condition that other circulating system tests are not influenced, so that the test effect is ensured, and the test efficiency is effectively improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a block diagram of a cardiovascular implant fatigue tester according to a preferred embodiment of the present invention;
FIG. 2 is a block diagram of a cardiovascular implant fatigue tester according to a preferred embodiment of the present invention;
FIG. 3 is a block diagram of the flange and drive assembly of the cardiovascular implant fatigue tester of the preferred embodiment of the present invention;
FIG. 4 is an exploded view of the flange and drive assembly of the cardiovascular implant fatigue tester of the preferred embodiment of the present invention;
FIG. 5 is an exploded view of the flange and drive assembly of the cardiovascular implant fatigue tester of the preferred embodiment of the present invention;
FIG. 6 is a block diagram of a flange of a cardiovascular implant fatigue tester in accordance with a preferred embodiment of the present invention;
FIG. 7 is a radial cross-sectional view of a flange of a cardiovascular implant fatigue tester according to a preferred embodiment of the present invention;
FIG. 8 is a block diagram of the base assembly of the cardiovascular implant fatigue tester of the preferred embodiment of the present invention;
FIG. 9 is a block diagram of the base assembly of the cardiovascular implant fatigue tester of the preferred embodiment of the present invention;
FIG. 10 is a block diagram of a diameter measurement assembly of the cardiovascular implant fatigue tester of the preferred embodiment of the present invention;
in the figure: the test assembly 1, the flange plate 11, the simulated blood vessel 12, the liquid inlet cavity 13, the adjusting rod 14, the liquid inlet hole 15, the liquid inlet joint 16, the simulated blood vessel joint 17, the communication hole 18, the through hole 19, the adjusting notch 110, the bottom hole 111, the through hole 112, the detecting hole 113, the detecting element 114, the connecting pipe 115, the caulking groove 116, the step 117, the connecting hole 118, the mounting hole 119, the driving assembly 2, the motor 21, the corrugated pipe 22, the housing 23, the output shaft 24, the lightening hole 25, the thrust seat 26, the positioning groove 27, the mounting window 28, the spring plate 29, the thrust seat stud 210, the mounting groove 211, the reinforcing rib 212, the connecting lug 213, the base assembly 3, the base 31, the swing seat 32, the u-shaped seat 33, the c-shaped groove 34, the clamping groove 35, the limiting pin 36, the roller 37, the arc-shaped hole 38, the bolt 39, the locking groove 310, the sliding rail 311, the sliding block 312, the locking block 313, the locking bar hole 314, the locking pin 315, the limiting column 316, the diameter measuring assembly 4, the bottom plate 41, the lead screw 42, the sliding seat 43, the supporting seat 44, the guiding shaft 45, the hand wheel 46, the locking block 47, the measuring instrument 48, the locking pin 410, the diameter measuring block 49 and the diameter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1-10, a cardiovascular implant fatigue testing machine comprises a testing component 1 and a driving component 2, wherein the testing component 1 comprises two flanges 11 which are oppositely arranged, and at least two groups of simulated blood vessels 12 which are connected between the two flanges 11, a liquid inlet cavity 13 which is correspondingly communicated with each group of simulated blood vessels 12 is arranged in each flange 11, and two adjacent liquid inlet cavities 14 are communicated or separated through an adjusting device; (ii) a The driving assembly 2 is installed on the opposite sides of the two flange plates 11, and the driving assembly 2 comprises a motor 21 and a corrugated pipe 22 which is connected with the motor 21 and correspondingly communicated with the liquid inlet cavity 13.
The liquid inlet cavities 13 are arranged in one-to-one correspondence with the simulated blood vessel groups, so that at least two liquid inlet cavities 13 are arranged in a centrosymmetric manner.
Wherein, two opposite liquid inlet cavities 13 on the two flanges 11 are correspondingly communicated with a plurality of simulated blood vessels 12 in the same group to form a single circulating system.
Specifically, a complete circulation system comprises two corresponding liquid inlet cavities 13 on two flange plates 11, liquid inlet holes 15 directly connected with the two liquid inlet cavities 13, and a plurality of simulated blood vessels 12 which are connected between the two liquid inlet cavities 13 and arranged in groups.
And the connection or disconnection between two adjacent circulating systems can be realized through the arrangement of the adjusting device.
In order to realize the connection between the liquid inlet cavity 13 and each simulated blood vessel 12, a plurality of liquid inlet holes 15 communicated with the liquid inlet cavity 13 are arranged outside the liquid inlet cavity 13, and the simulated blood vessels 12 in the same group are correspondingly connected with each liquid inlet hole 15 outside the same liquid inlet cavity 13.
The liquid inlet cavity 13 is located in the flange plate 11, the outer side of the liquid inlet cavity penetrates through the flange plate 11 to be arranged in an opening mode so as to be communicated and matched with the corresponding corrugated pipe 22, the liquid inlet holes 15 are evenly distributed on the outer side of the liquid inlet cavity 13 and communicated with the liquid inlet cavity 13, and the inside of the same circulating system is guaranteed to be in a communicated state while the simulated blood vessel 12 is conveniently connected.
In order to connect an external liquid supplementing pipe or a liquid outlet pipe conveniently, the liquid inlet hole 15 is positioned in the radial direction of the flange plate 11, and a liquid inlet connector 16 is arranged at the outer end of the liquid inlet hole.
Wherein, can be with the help of external water pipe when injecting test medium into experimental subassembly. Specifically, the external water pipe can be connected with any one of the liquid inlet holes 15 of one of the flange plates 11 through the liquid inlet connector 16, and can be connected with the other flange plate 11 through the liquid inlet connector 16, and any one of the liquid inlet holes 15 of the other flange plate 11 can be used for prompting the liquid supplementing state, and the rest of the liquid inlet holes 15 except the two liquid inlet holes 15 can be plugged by plugs matched with the liquid inlet connector 16, so that the leakage of the test medium is avoided.
When injecting test medium into test assembly, the fluid infusion mechanism can be connected to the other end of external water pipe, injects test medium into test assembly through external water pipe, has the test medium discharge until being used for indicateing the feed liquor hole 15 department of fluid infusion situation, shows that the air in the whole test assembly is discharged completely, and fills in test medium.
Preferably, the liquid inlet joint 16 can be a threaded joint, and is convenient to disassemble, assemble and use.
In order to connect the simulated blood vessel 12 and the liquid inlet hole 15 conveniently, a simulated blood vessel joint 17 which is positioned on the inner side surface of the flange plate 11 and is used for connecting the simulated blood vessel 12 is arranged on the liquid inlet hole 15.
The inside of the liquid inlet hole 15 is provided with a connection hole 118 communicated therewith, and the dummy blood vessel connectors 17 are installed in the connection hole 118, thereby facilitating connection with the respective dummy blood vessels 12.
Preferably, the simulated blood vessel joint 17 can be a threaded joint, and is convenient to disassemble, assemble and use.
In order to facilitate the switching between the two adjacent liquid inlet chambers 13 between the connected and separated states, the adjusting device is an adjusting rod 14 which is rotatably installed in the flange plate 11.
Specifically, the flange 11 is provided with a mounting hole 119 in the radial direction between two liquid inlet chambers 13 connected, and the adjusting rod 14 is arranged in the mounting hole 119.
In order to achieve communication between the adjacent two liquid inlet chambers 13, a communication hole 18 is provided between the adjacent two liquid inlet chambers 13, the adjustment rod 14 passes through the communication hole 18 in a direction perpendicular to the communication hole 18, and a through hole 19 penetrating in a radial direction thereof is provided at a position of the adjustment rod 14 at the communication hole 18.
The adjusting rod 14 is rotatably arranged in the mounting hole 119 in the flange plate 11, and when two adjacent liquid inlet cavities 13 need to be communicated, the adjusting rod 14 is rotated to enable the through hole 19 to be communicated with the communicating hole 18, so that the two liquid inlet cavities 13 on the two sides of the adjusting rod 14 can be communicated; if two adjacent liquid inlet cavities 13 need to be separated, the adjusting rod 14 is rotated to stagger the through hole 19 and the communicating hole 18, so that the two liquid inlet cavities 13 on two sides of the adjusting rod 14 can be separated.
In order to enable the adjusting rod 14 to be in a vertical direction with the communicating hole 18 so as to enable the adjusting rod 14 to rotate to enable the liquid inlet chambers 13 on the two sides to be communicated or separated, the adjusting rod 14 is installed in a radial direction of the flange plate 11.
In order to facilitate the rotation of the adjustment lever 14, the outer end of the adjustment lever 14 is provided with an adjustment notch 110.
By adjusting the notch 110, a tool such as a driver can be selected to rotate the adjustment lever 14, and the state of the adjustment lever 14, that is, the through hole 19 communicates with or is misaligned with the communication hole 18 can be visually displayed by adjusting the notch 110.
The inner end of the adjusting rod 14 is provided with a bottom hole 111 which is communicated with the through hole 19 of the adjusting rod and is positioned in the axial direction of the adjusting rod 14, a through hole 112 which is communicated with the bottom hole 111 is arranged in the flange plate 11 at the inner side of the adjusting rod 14, a detection hole 113 which is positioned in the axial direction of the flange plate 11 and penetrates through the outer side of the flange plate is arranged at the center of the flange plate 11, each through hole 112 is respectively communicated with the detection hole 113, and a detection element 114 which is positioned on the outer side face of the flange plate 11 is arranged in the detection hole 113.
The detecting element 114 may be, but not limited to, a pressure sensor or a temperature sensor, which can be used to detect the pressure and temperature change of the test medium in the circulation system under operation.
In order to fix the relative position between the two flanges 11, a connecting tube 115 is provided between the two flanges 11, and the simulated blood vessel 12 is arranged around the connecting tube 115.
Specifically, the two ends of the connecting pipe 115 are connected to the flange plate 11 through flange surfaces and bolts, respectively.
Because the test environments required by different types of samples are different, such as the length of a simulated blood vessel, and in order to match the simulated blood vessels with different lengths, preferably, the connecting pipe 115 is of a two-section detachable telescopic pipe structure, that is, the connecting pipe includes an outer connecting pipe and an inner connecting pipe sleeved in the outer connecting pipe, and the ends of the outer connecting pipe and the inner connecting pipe, which are far away from each other, are respectively fixed on the corresponding flange plates 11 through flange surfaces.
The one end externally mounted of outer joint pipe orientation interconnection is had the staple bolt retaining member, when the length of connecting pipe 115 is adjusted to needs, loosens the staple bolt retaining member, adjusts the flexible degree between interconnection takeover and the outer joint pipe, treats to adjust required length after, can utilize the staple bolt retaining member to take over the interconnection with outer joint pipe locking fixed can.
Preferably, a plurality of U type breachs have been seted up on the one end circumference of outer joint pipe orientation interconnection pipe, not only can make things convenient for the flexible of interconnection pipe, can conveniently utilize moreover to hold the retaining member tightly and lock both.
The driving assembly 2 is used for providing power for each circulation system, namely, the corrugated pipe 22 can be compressed by the linear motion of the motor 21, and after the corrugated pipe 22 is deformed, the test medium in the circulation system can be compressed, so that the simulated blood vessel 12 can be expanded, and the test of the sample in the simulated blood vessel 12 can be realized.
In order to be able to drive the bellows 22 by means of a motor 21, the drive assembly further comprises a thrust block 26, the outer end of the bellows 22 is fixed to the thrust block 26, and the thrust block 26 is connected to the motor 21.
The outer flange surface of the corrugated pipe 22 is directly fixed on the thrust seat 26, the motor 21 drives the thrust seat 26 to move so as to drive each corrugated pipe 22, and the pressure in each circulating system is controlled by the horizontal displacement generated by the motor 21, so that the motor 21 is connected with each corrugated pipe 22 through the thrust seat 26 so as to effectively ensure the parameter consistency of each circulating system in a running state.
Preferably, the inner side of the thrust block 26 is provided with a positioning groove 27 for positioning the outer flange surface of the bellows 22.
In order to facilitate the installation of the motor 21, and to protect the bellows 22,
the driving assembly further comprises a cover 23 fixed on the outer side surface of the flange plate 11, the corrugated pipe 22 is arranged in the cover 23, the motor 21 is installed on the outer side of the cover 23, and an output shaft of the motor passes through an end plate of the cover 23 to be connected with a thrust seat 26 in the cover 23.
Specifically, the housing 23 is fixed to the outer side of the flange 11 by bolts, the opening side of the liquid inlet chamber 13 located on the outer side of the flange 11 is provided with a caulking groove 116, the corrugated pipe 22 has an inner end opening structure, and the inner flange surface of the corrugated pipe is assembled on the outer side of the flange 11, that is, the corrugated pipe is fitted in the caulking groove 116, so that the corrugated pipe 22 is communicated with the liquid inlet chamber 13 corresponding to the corrugated pipe 22.
Preferably, the housing 23 is provided with a plurality of lightening holes 25.
Preferably, a plurality of mounting windows 28 are provided on the end surface of the housing 23, so that the thrust seat 26 and the bellows 22 can be fixed through the mounting windows 28.
When the motor 21 performs a linear motion, a buffer must be installed between the motor 21 and the bellows 22, otherwise the stability of the motor 21 cannot be maintained, thereby affecting the service life of the motor 21. In the test process, the corrugated pipe 22 is filled with test media, the downward gravity of the motor 21 after the motor 21 is connected can generate radial force on the motor 21, the existing buffer part generally adopts a spring structure, but the buffer part cannot resist the radial force generated by the corrugated pipe 22 on the motor 21, and after long-term movement under the action of the force, the rotor of the motor 21 can be radially deviated, so that the condition of cylinder abrasion is generated, and the service life of the motor 21 is directly influenced.
Therefore, in the present embodiment, in order to solve the above problem, the outer side of the thrust bearing 26 is provided with the elastic sheet 29 located in the housing 23, and the thrust bearing stud 210 located on the outer side of the thrust bearing 26 passes through the central hole of the elastic sheet 29 to be connected with the output shaft 24 of the motor 21.
Specifically, a threaded hole is formed in the output shaft 24 of the motor 21, and a stud of the thrust bearing 26 can be assembled in the threaded hole, so that threaded connection between the threaded hole and the threaded hole is achieved, and the mounting and dismounting are convenient.
The thrust base stud 210 penetrates through the central hole of the elastic sheet 29 and then is connected with the output shaft 24 of the motor 21, so that the radial force of the corrugated pipe 22 on the motor 21 can be reduced, and the running linearity of the mover of the motor 21 is improved. And the elastic sheet 29 provides good buffer action when vibrating at high frequency, namely, the stability of the motor 21 during operation is ensured by utilizing the energy absorption and release of the elastic sheet 29 in the deformation process.
In order to ensure the buffering effect of the elastic sheet 29, two elastic sheets 29 are provided and arranged in a crisscross manner.
In order to conveniently limit and fix the two ends of the elastic sheet 29, the inner wall of the housing 23 is provided with mounting grooves 211, and the two ends of the elastic sheet 29 are assembled in the mounting grooves 211.
Through the cross arrangement of the elastic sheets 29, when the motor 21 transmits power to the circulating system, the elastic force distribution is more uniform, and a better and more stable buffering effect is provided for the action of the motor 21.
The elastic sheet 29 is a U-shaped structure with an inward opening, and bending plates at two ends of the elastic sheet are matched in the mounting groove 211 and fixedly connected with the housing 23 by bolts.
In order to ensure the strength of the cover 23, the outer wall of the cover 23 is provided with a reinforcing rib 212 corresponding to the mounting groove 211 and protruding outward.
In order to support the test assembly 1 and the driving assembly 2 conveniently, the fatigue testing machine further comprises a base assembly 3, wherein the base assembly 3 comprises a base 31, a swinging seat 32 capable of swinging left and right on the base 31, and two U-shaped seats 33 capable of moving left and right on the swinging seat 32, and the U-shaped seats 33 are respectively fixed at the bottoms of the two flange plates 11.
The U-shaped seat 33 is used to hold the two flanges 11.
Specifically, C-shaped grooves 34 are respectively formed in the tops of two inner side walls of the U-shaped seat 33, an inward concave step 117 is formed on the inner side surface of the flange plate 11, and the step 117 is fitted in the C-shaped groove 34 on the inner wall of the U-shaped seat 33. The both sides of the C-shaped groove 34 on the lateral wall of the U-shaped seat 33 are provided with clamping grooves 35, the inner ring of the housing 23 is provided with a plurality of connecting lugs 213 protruding outwards, the housing 23 is fixed outside the corresponding flange plate 11 through the connecting lugs 213, the inner ring of the housing 23 is matched in the C-shaped groove 34 on the outer wall of the U-shaped groove, and two of the connecting lugs 213 are matched in the clamping grooves 35 to realize the assembling and positioning.
Preferably, the outer side wall of the U-shaped seat 33 is provided with a limit pin 36, and the inner end of the limit pin 36 abuts against the outer side surface of the flange 11 to limit the flange 11.
Preferably, rollers 37 are arranged on the inner walls of the two side walls of the U-shaped seat 33, the outer annular surface of the flange plate 11 is attached to the rollers 37, the flange plate can rotate and roll before being prepared for a test, so that air in the test assembly can be discharged when a test medium is injected into the test assembly, and when the test is completed after liquid injection, the position of the flange plate 11 can be fixed through the limiting pin 36.
When simulated blood vessels with different lengths are replaced according to different sample requirements, the U-shaped seat 33 can move left and right on the swing seat 32 in order to adjust the distance between the two flange plates 11. The oscillating base 32 is arranged to incline the whole test assembly 1 to make the liquid inlet side face down when the test medium is injected into the circulating system, so that the circulating system can be completely filled with the test medium.
The base 31 is arranged to support the whole fatigue testing machine and ensure the stability of the fatigue testing machine during working.
In order to realize the swing of the swing seat 32, two side walls of the swing seat 32 are respectively provided with a concave arc hole 38, two side walls of the base 31 are respectively located at the outer sides of the two side walls of the swing seat 32, and the inner wall of the base is provided with a bolt 39 assembled in the arc hole 38.
Specifically, the two side walls of the swinging seat 32 are fan-shaped plates, the bolt 39 is loosened, the swinging seat 32 swings along the direction of the arc-shaped hole 38 through the matching of the arc-shaped hole 38 and the bolt 39, after the test medium is filled, the swinging seat 32 is placed in a horizontal position, and the bolt 39 is screwed, so that the random swinging of the swinging seat 32 in the test process can be avoided.
Preferably, the base 31 is provided with L-shaped stoppers 310 at two sides of the side wall of the swing seat 32, so as to limit the swing range of the swing seat 32.
In order to realize the left and right movement of the U-shaped seat 33, a transverse slide rail 311 is arranged on the top plate of the swing seat 32, and a slide block 312 which is in sliding fit with the slide rail 311 is arranged at the bottom of the U-shaped seat 33.
The bottom of the U-shaped seat 33 is provided with a locking block 313, a locking bar hole 314 parallel to the sliding rail 311 is arranged below the locking block 313, the bottom of the top plate of the swinging seat 32 is provided with a locking pin 315 assembled in the locking bar hole 314, the locking pin 315 passes through the locking bar hole 314 to be matched with the locking block 313, after the U-shaped seat 33 moves to a set position, the locking pin 315 is screwed up and screwed on the bottom of the top plate of the swinging seat 32, so that the locking block 313 can be fixed, and the position of the U-shaped seat 33 is fixed.
The fatigue testing machine also comprises a diameter measuring component 4 arranged on one side of the base component 3, wherein the diameter measuring component 4 comprises a bottom plate 41, a lead screw 42 which is arranged on the bottom plate 41 and is transversely arranged, a sliding seat 43 is arranged on a nut pair of the lead screw 42, and a diameter measuring instrument 410 is arranged on the sliding seat 43 and is used for measuring the diameter of the simulated blood vessel 12 in the testing process.
The screw rod 42 is mounted on the support seat 44, the support seat 44 is further mounted with guide shafts 45 which are positioned at two sides of the screw rod 42 and are parallel to the screw rod 42, and the guide shafts 45 penetrate through the slide block 312.
One end of the screw rod 42 is provided with a hand wheel 46 so as to rotate the screw rod 42 and realize the adjustment of the position of the diameter measuring instrument 410.
The inner side of the hand wheel 46 is provided with a locking plate 47, the screw rod 42 penetrates through a hole on the locking plate 47, one side of the hole is provided with a locking groove 48 extending to the side face of the locking plate 47, the locking groove 48 is provided with a locking pin 49, the locking pin 49 is screwed downwards, the screw rod 42 can be locked in the hole and cannot rotate, the locking pin 49 is unscrewed upwards, and the screw rod 42 can freely rotate in the hole, so that the position of the diameter measuring instrument 410 can be moved.
Preferably, a set of limiting columns 316 are arranged on the outer side wall of the base 31 on the side where the diameter measuring assembly 4 is located, so as to limit the moving range of the diameter measuring instrument 410.
In the present embodiment, four circulation systems, i.e. four sets of simulated blood vessels 12 are provided, four liquid inlet cavities 13 are provided in each flange plate 11, and five simulated blood vessels 12 are provided in each set, so as to realize the synchronous test of 20 samples. Correspondingly, each drive unit 2 is provided with four bellows 22 for mating connection with the four inlet chambers 13 in the respective flange 11.
Before the test, the simulated blood vessel 12 with a proper diameter and a proper length is selected according to the test requirements of the sample, the length of the connecting pipe 115 is adjusted according to the length of the simulated blood vessel 12, and then the two ends of the simulated blood vessel 12 with the sample assembled are respectively and correspondingly installed on the simulated blood vessel connectors 17 on the two flange plates 11.
At the moment, one optional liquid inlet hole 15 on one flange plate 11 is connected with an external water pipe, the other end of the external water pipe is connected with a liquid supplementing mechanism, and other liquid inlet holes 15 on the flange plate 11 are blocked, and meanwhile, one liquid inlet hole 15 on the other flange plate 11 is selected for prompting the liquid supplementing condition and blocking other liquid inlet holes 15 on the flange plate 11. At the moment, the external water pipe is used as a water inlet pipe.
Specifically, the liquid inlet hole 15 connected with the external water pipe is preferably located below the flange plate 11 where the external water pipe is located, and the liquid inlet hole 15 used for prompting the liquid supplementing condition is preferably located above the flange plate 11 where the external water pipe is located, so that air in the test assembly can be completely discharged, and the test medium can be fully filled in the test assembly.
Then the test assembly is inclined through the swing seat 32, namely the flange 11 connected with the external water pipe is inclined downwards, the other flange 11 is inclined upwards, and the two flanges 11 can be properly rotated towards two sides while liquid is replenished, so that air in the test assembly can be completely discharged.
When the liquid inlet hole 15 for prompting the liquid supplementing condition is located at the topmost part of the flange plate 11 where the liquid inlet hole is located and test media are discharged, the test assembly is indicated to be filled with the test media, then the test assembly is turned to be horizontal, the two flange plates 11 are fixed in position by the limiting pins 36, the liquid inlet hole for prompting the liquid supplementing condition is plugged by the plugs, meanwhile, the valve on the external water pipe is closed, the external water pipe is disconnected from the liquid supplementing mechanism, and the test operation can be conducted.
In the test process, the motor 21 drives the thrust bearing 26 to move linearly to compress the corrugated pipe 22, then the test medium in the circulating system is pressurized, the simulated blood vessel 12 is expanded to form the test environment required by the sample, and at the moment, the diameter of the simulated blood vessel 12 is measured and recorded by the test assembly.
After the test is finished, the external water pipe can be used as a drain pipe, and the test medium in the test assembly can be discharged.
During the test, if the sample in one circulation system has a problem, the adjusting devices on both sides of the liquid inlet cavity 13 of the circulation system are rotated to the state that the through hole 19 and the communication hole 18 are staggered, so that the circulation system is separated from other test systems, and the system is closed. Thus, the sample in the circulation system can be replaced without affecting the test of other circulation systems.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A cardiovascular implant fatigue testing machine, comprising:
the test assembly (1) comprises two oppositely arranged flange plates (11) and at least two groups of simulated blood vessels (12) connected between the two flange plates (11), wherein liquid inlet cavities (13) correspondingly communicated with the simulated blood vessels (12) of each group are arranged in the flange plates (11), and the two adjacent liquid inlet cavities (13) are communicated or separated through a regulating device;
drive assembly (2), it installs in the back of the body side of two ring flanges (11), drive assembly (2) include motor (21), and with motor (21) link to each other and with bellows (22) that feed liquor chamber (13) correspond the intercommunication.
2. The cardiovascular implant fatigue testing machine according to claim 1, wherein a plurality of fluid inlet holes (15) are arranged on the outer side of the fluid inlet cavity (13), and the simulated blood vessels (12) in the same group are correspondingly connected with the fluid inlet holes (15) on the outer side of the same fluid inlet cavity (13);
the liquid inlet hole (15) is positioned in the radial direction of the flange plate (11), and a liquid inlet joint (16) is arranged at the outer end of the liquid inlet hole;
and a simulated blood vessel joint (17) which is positioned on the inner side surface of the flange plate (11) and is used for connecting a simulated blood vessel (12) is arranged on the liquid inlet hole (15).
3. The cardiovascular implant fatigue testing machine of claim 1, wherein the adjusting device is an adjusting rod (14) rotatably mounted in the flange plate (11);
a communication hole (18) is formed between every two adjacent liquid inlet cavities (13), the adjusting rod (14) penetrates through the communication hole (18) in a direction perpendicular to the communication hole (18), and a through hole (19) penetrating through the adjusting rod (14) in the radial direction is formed in the position, located at the communication hole (18), of the adjusting rod (14);
the adjusting rod (14) is installed in the radial direction of the flange plate (11), and an adjusting notch (110) is formed in the outer end of the adjusting rod.
4. The cardiovascular implant fatigue testing machine according to claim 1, characterized in that a connecting tube (115) is provided between two flanges (11), the simulated vessel (12) being arranged around the connecting tube (115).
5. The cardiovascular implant fatigue testing machine of claim 1, wherein the driving assembly further comprises a thrust block (26), the outer end of the bellows (22) is fixed on the thrust block (26), and the thrust block (26) is connected to the motor (21).
6. The cardiovascular implant fatigue testing machine of claim 5, wherein the driving assembly (2) further comprises a housing (23) fixed on the outer side of the flange (11), the bellows (22) is arranged in the housing (23), the motor (21) is arranged on the outer side of the housing (23), and the output shaft (24) of the motor is connected with a thrust seat (26) in the housing through an end plate of the housing (23).
7. The cardiovascular implant fatigue testing machine according to claim 6, wherein the outer side of the thrust seat (26) is provided with a spring plate (29) positioned in the housing (23), and a thrust seat stud (210) positioned on the outer side of the thrust seat (26) passes through a central hole of the spring plate (29) to be connected with the output shaft (24) of the motor (21);
the elastic sheets (29) are arranged in a cross shape.
8. The cardiovascular implant fatigue testing machine of claim 7, wherein the inner wall of the housing (23) is provided with a mounting groove (211), and both ends of the elastic sheet (29) are assembled in the mounting groove (211);
and reinforcing ribs (212) which correspond to the mounting grooves (211) and protrude outwards are arranged on the outer wall of the housing (23).
9. The cardiovascular implant fatigue testing machine according to claim 1, further comprising a base assembly (3), wherein the base assembly (3) comprises a base (31), a swinging seat (32) capable of swinging left and right on the base (31), and two U-shaped seats (33) capable of moving left and right on the swinging seat (32), and the U-shaped seats (33) are respectively fixed at the bottoms of the two flange plates (11).
10. The fatigue testing machine for the cardiovascular implant according to claim 9, wherein two side walls of the swinging seat (32) are respectively provided with a concave arc-shaped hole (38), two side walls of the base (31) are respectively positioned at the outer sides of the two side walls of the swinging seat (32), and the inner wall of the base is provided with a plug pin (39) which is assembled in the arc-shaped hole (38);
the top plate of the swinging seat (32) is provided with a transverse sliding rail (311), and the bottom of the U-shaped seat (33) is provided with a sliding block (312) which is in sliding fit with the sliding rail (311).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211545941.4A CN115541404B (en) | 2022-12-05 | 2022-12-05 | Cardiovascular implant fatigue testing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211545941.4A CN115541404B (en) | 2022-12-05 | 2022-12-05 | Cardiovascular implant fatigue testing machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718494A (en) * | 2023-08-10 | 2023-09-08 | 天津大学 | High-frequency pulse type artificial implant fatigue tester |
| CN117705560A (en) * | 2024-02-06 | 2024-03-15 | 圣塔菲医疗科技(常州)有限公司 | Real-time abrasion test device for cardiovascular implant |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5670708A (en) * | 1996-04-02 | 1997-09-23 | Endura-Tec Systems Corporation | High frequency intravascular prosthesis fatigue tester |
| US20030110830A1 (en) * | 2001-07-23 | 2003-06-19 | Mark Dehdashtian | Methods and apparatuses for measuring the compliance of stents and stented grafts |
| CN109163992A (en) * | 2018-09-03 | 2019-01-08 | 上海远梓电子科技有限公司 | A kind of intravascular stent fatigue behaviour testing in vitro device and test method |
| CN209342341U (en) * | 2018-09-14 | 2019-09-03 | 东莞市先健医疗有限公司 | Fatigue test device |
| CN209606062U (en) * | 2018-09-14 | 2019-11-08 | 东莞市先健医疗有限公司 | Fatigue test device |
| CN214843966U (en) * | 2021-06-17 | 2021-11-23 | 上海盈阁智能科技有限公司 | Artificial support fatigue tester |
| CN216484426U (en) * | 2021-11-02 | 2022-05-10 | 上海视疆科学仪器有限公司 | Multi-shaft vascular stent bending fatigue performance testing equipment |
| CN115389352A (en) * | 2022-10-27 | 2022-11-25 | 圣塔菲医疗科技(常州)有限公司 | Cardiovascular implant fatigue test device |
-
2022
- 2022-12-05 CN CN202211545941.4A patent/CN115541404B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5670708A (en) * | 1996-04-02 | 1997-09-23 | Endura-Tec Systems Corporation | High frequency intravascular prosthesis fatigue tester |
| US20030110830A1 (en) * | 2001-07-23 | 2003-06-19 | Mark Dehdashtian | Methods and apparatuses for measuring the compliance of stents and stented grafts |
| CN109163992A (en) * | 2018-09-03 | 2019-01-08 | 上海远梓电子科技有限公司 | A kind of intravascular stent fatigue behaviour testing in vitro device and test method |
| CN209342341U (en) * | 2018-09-14 | 2019-09-03 | 东莞市先健医疗有限公司 | Fatigue test device |
| CN209606062U (en) * | 2018-09-14 | 2019-11-08 | 东莞市先健医疗有限公司 | Fatigue test device |
| CN214843966U (en) * | 2021-06-17 | 2021-11-23 | 上海盈阁智能科技有限公司 | Artificial support fatigue tester |
| CN216484426U (en) * | 2021-11-02 | 2022-05-10 | 上海视疆科学仪器有限公司 | Multi-shaft vascular stent bending fatigue performance testing equipment |
| CN115389352A (en) * | 2022-10-27 | 2022-11-25 | 圣塔菲医疗科技(常州)有限公司 | Cardiovascular implant fatigue test device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718494A (en) * | 2023-08-10 | 2023-09-08 | 天津大学 | High-frequency pulse type artificial implant fatigue tester |
| CN117705560A (en) * | 2024-02-06 | 2024-03-15 | 圣塔菲医疗科技(常州)有限公司 | Real-time abrasion test device for cardiovascular implant |
| CN117705560B (en) * | 2024-02-06 | 2024-04-19 | 圣塔菲医疗科技(常州)有限公司 | Real-time abrasion test device for cardiovascular implant |
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|---|---|
| CN115541404B (en) | 2023-03-28 |
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