CN111189693A - Valve fatigue life testing device - Google Patents
Valve fatigue life testing device Download PDFInfo
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- CN111189693A CN111189693A CN201811353822.2A CN201811353822A CN111189693A CN 111189693 A CN111189693 A CN 111189693A CN 201811353822 A CN201811353822 A CN 201811353822A CN 111189693 A CN111189693 A CN 111189693A
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- valve
- flow passage
- fatigue life
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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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
Abstract
The invention provides a valve fatigue life testing device, comprising: the module assembly comprises a body, wherein an upper layer runner and a lower layer runner which are communicated with each other are arranged in the body; the upper flow channel comprises a valve fixer for fixing the valve piece, and the valve piece fixed on the valve fixer divides the upper flow channel of the body into a left cavity and a right cavity along the horizontal direction; the left side and the right side of the top of the body are respectively provided with a linear motor, and a piston with a rolling diaphragm is connected to the linear motor; the top of the body is also provided with two air containers. The two linear motors generate motions with the same frequency and opposite phases through current control, load waveforms are directly added to the test liquid filled in the left cavity and the right cavity of the body, the load received by the test liquid is transmitted to the left side and the right side of the transversely arranged valve piece according to the Pascal law, the load in the same direction is applied to the two ends of the valve piece, and the valve piece is opened or closed.
Description
Technical Field
The invention relates to the technical field of fatigue life testing devices, in particular to a valve fatigue life testing device.
Background
The heart valve disease is one of the main heart diseases at present, and has various etiological factors such as rheumatism, degeneration, congenital and the like, and the only treatment method for most patients with the heart valve disease is to perform artificial heart valve replacement. The quality of the valve is directly related to the safety of the patient, so that various performance indexes of the valve need to be tested and known. The evaluation and comparison of mechanical properties are mainly realized by an in vitro simulation experiment device. Among them, in vitro testing of fatigue life of artificial heart valves is an important means for evaluating design and is a prerequisite for entering clinical experiments.
The device described in the Chinese patent of invention, valve fatigue life testing device, with publication number CN103622763B, can complete in vitro simulation experiment tests, but still has the following disadvantages: the device is provided with a linear motor only on one side of a body, and a load waveform is directly applied to test liquid through current control and is transmitted to a tested valve or other tested pieces according to the Pascal law. When the operating frequency of the linear motor is too high, or the pressure required by opening and closing of the tested valve or other tested pieces is too high, the test liquid is not enough to relax back to a static equilibrium state within two operating times of the linear motor, the load waveform cannot be completely transmitted to the tested valve or other tested pieces according to the Pascal law, the test result can change, and the actual physiological condition is not met.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the technical problem to be solved by the present invention is to provide a valve fatigue life testing device.
The valve fatigue life testing device of the invention comprises: the module assembly comprises a body, wherein an upper layer flow channel and a lower layer flow channel which are communicated with each other are arranged in the body; the upper flow channel comprises a valve fixer for fixing a valve piece, and the valve piece fixed on the valve fixer divides the upper flow channel of the body into a left cavity and a right cavity along the horizontal direction; the left side and the right side of the top of the body are respectively provided with a linear motor, the linear motor is connected with a piston with a rolling diaphragm, and the piston is arranged in the body in an extending manner; the top of the body is also provided with two air volumes which are respectively communicated with the left cavity and the right cavity, and the pressure transmitted by the two air volumes to the corresponding left cavity and the right cavity is adjustable; the two linear motors generate motions with the same frequency and opposite phases through current control, load waveforms are directly added to test liquid filled in the left cavity and the right cavity of the body, the test liquid transmits received loads to the left side and the right side of the valve piece which are transversely arranged, the loads in the same direction are applied to the two ends of the valve piece, and the valve piece is opened or closed.
Preferably, the body comprises a middle shell, the left side of the middle shell is detachably connected with a left motor base, and the right side of the middle shell is detachably connected with a right motor base; the middle shell is provided with a middle upper runner and a middle lower runner which are communicated with each other, and the valve fixer and the valve piece are both arranged in the middle upper runner; the left motor base is provided with a left base body upper flow passage and a left base body lower flow passage, and the right motor base is provided with a right base body upper flow passage and a right base body lower flow passage; the left motor base and the right motor base are respectively provided with the linear motor; the left seat body upper flow passage and the right seat body upper flow passage are both communicated with the middle part upper flow passage; the left side seat body lower runner and the right side seat body lower runner are communicated with the middle part lower runner.
Further, all install the fan on the left motor cabinet with the right motor cabinet.
Further, an inlet valve is arranged on the left motor base, and an outlet valve is arranged on the right motor base; the inlet valve is arranged at the upper part of the upper-layer flow passage, and the outlet valve is arranged at the lower part of the upper-layer flow passage.
Further, valve fatigue life testing arrangement, still include the liquid heating subassembly, the liquid heating subassembly include with the import valve with the infusion case that the outlet valve all communicates, be equipped with the water pump on the infusion case, the infusion case is connected with the heater block, the infusion case is connected with the temperature test part, the temperature test part will detect the temperature numerical value of test liquid in the infusion case conveys the heater block, the heater block is according to the temperature numerical value of the test liquid who obtains, and the adjustment is right the temperature that the infusion case carries out the heating.
Furthermore, a drain valve is arranged on the lower-layer flow passage.
Furthermore, a damper is arranged in the middle lower flow channel of the middle shell.
Preferably, the two linear motors are both connected with a pulse width modulation controller, and the pulse width modulation controller is used for controlling the operation of the two linear motors.
Furthermore, a Hall sensor is arranged in each linear motor, and each Hall sensor is connected with the pulse width modulation controller.
Preferably, the valve fatigue life testing device further comprises two pressure sensors mounted on the body, and the two pressure sensors are respectively used for detecting the pressure in the left cavity and the pressure in the right cavity.
As described above, the valve fatigue life testing device of the present invention has the following beneficial effects:
1) the two linear motors generate motions with the same frequency and opposite phases through current control, load waveforms are directly added to test liquid filled in the left cavity and the right cavity of the body, the load received by the test liquid is transmitted to the left side and the right side of the valve piece which is transversely arranged according to the Pascal law, the load in the same direction is applied to the two ends of the valve piece, and the valve piece is opened or closed; the requirements for valve fatigue testing are: the leaflets of the valve component are fully open throughout the test, which requires the valve fatigue life testing device to provide adequate flow; therefore, in the same state, compared with the structure that a single motor is adopted in the prior art, the two linear motors of the device do motions with the same frequency and opposite phases, double flow can be provided, the requirement that the valve piece is tested at a higher frequency is met, and the time required by the test is reduced;
2) through the current (load) control mode, the load can be directly loaded on the valve member, so that the pressure waveform and the driving waveform have direct relation, and the pressure waveform is simpler to adjust. Closed loop control of peak pressure by commands controlling the drive waveform may thus be achieved.
Drawings
Fig. 1 is a schematic perspective view of a valve fatigue life testing apparatus according to example 1.
Fig. 2 is a left side schematic structural view of the valve fatigue life testing device of example 1.
Fig. 3 is a schematic view of the structure in the direction of a-a of fig. 2.
Fig. 4 shows a schematic diagram of the liquid heating assembly of the valve fatigue life testing apparatus of example 1.
Description of the reference numerals
100 main body
110 middle shell
111 middle part upper flow passage
112 middle lower flow passage
120 left motor base
Upper flow channel of 121 left side seat body
122 left seat body lower runner
130 right motor base
131 right side seat body upper flow passage
132 right side seat body lower runner
101 upper flow channel
102 lower flow channel
1011 left cavity
1012 right cavity
200 valve component
210 valve holder
211 through hole of fixer
300 linear motor
310 piston
400 air volume
500 fan
610 inlet valve
620 outlet valve
630 drain valve
710 transfusion box
720 heating component
730 temperature testing part
810 damper
900 pressure sensor
123 left transparent observation window
133 right transparent observation window
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to the attached drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1 to 4, the valve fatigue life testing apparatus of the present embodiment includes: at least one modular component;
the module assembly comprises a body 100, wherein an upper layer flow passage 101 and a lower layer flow passage 102 which are communicated with each other are arranged in the body 100;
the upper flow channel 101 comprises a valve holder 210 for fixing the valve member 200, and the valve member 200 fixed on the valve holder 210 divides the upper flow channel 101 of the body 100 into a left cavity 1011 and a right cavity 1012 along the horizontal direction; the left side and the right side of the top of the body 100 are respectively provided with a linear motor 300, the linear motor 300 is connected with a piston 310 with a rolling diaphragm, and the piston 310 is inserted into the body 100;
the top of the body 100 is further provided with two air volumes 400, the two air volumes 400 are respectively communicated with the left cavity 1011 and the right cavity 1012, and the pressure transmitted by the two air volumes 400 to the corresponding left cavity 1011 and right cavity 1012 is adjustable; the two linear motors 300 generate motions with the same frequency and opposite phases through current control, load waveforms are directly applied to test liquid filled in the left cavity 1011 and the right cavity 1012 of the body 100, the test liquid transmits the received loads to the left and right sides of the valve piece 200 arranged transversely, and the loads in the same direction are applied to the two ends of the valve piece 200, so that the valve piece 200 is opened or closed.
The two linear motors generate motions with the same frequency and opposite phases through current control, load waveforms are directly added to test liquid filled in the left cavity 1011 and the right cavity 1012 of the body 100, the load received by the test liquid is transmitted to the left side and the right side of the valve piece 200 which are transversely arranged according to the Pascal law, the same-direction load is applied to the two ends of the valve piece 200, and the valve piece 200 is opened or closed; the requirements for valve fatigue testing are: the leaflets of valve component 200 are fully open throughout the test, which requires the valve fatigue life testing device to provide adequate flow; therefore, in the same state, compared with the structure that a single motor is adopted in the prior art, the two linear motors 300 of the present application do the motions with the same frequency and opposite phases, which can provide double flow, meet the requirement of the valve member 200 for testing at a higher frequency, and reduce the time required for testing. The high-frequency oscillation signals generated by the test liquid in the body 100 are filtered through the filtering effect of the gas container 400 arranged at the top of the body 100, and the pressure of the gas container 400 output to the corresponding left cavity 1011 and right cavity 1012 can be adjusted by adjusting the volume of the gas in the gas container 400 so as to change the pressure applied to the valve piece 200 in the opening or closing state, thereby achieving the test state required by the standard.
By means of current (load) control, the load can be directly applied to the valve member 200, so that the pressure waveform and the driving waveform have a direct relationship, thereby making it easier to adjust the pressure waveform. Thus enabling closed loop control of peak pressure via commands controlling the drive waveform.
The body 100 comprises a middle shell 110, the left side of the middle shell 110 is detachably connected with a left motor base 120, and the right side of the middle shell 110 is detachably connected with a right motor base 130;
the middle housing 110 has a middle upper flow passage 111 and a middle lower flow passage 112 communicating with each other, and the valve holder 210 and the valve member 200 are installed in the middle upper flow passage 111;
the left motor base 120 has a left base body upper flow passage 121 and a left base body lower flow passage 122, and the right motor base 130 has a right base body upper flow passage 131 and a right base body lower flow passage 132; the left motor base 120 and the right motor base 130 are respectively provided with a linear motor 300; the left seat body upper flow passage 121 and the right seat body upper flow passage 131 are both communicated with the middle part upper flow passage 111; the left side seat body upper flow passage 121, the right side seat body upper flow passage 131 and the middle part upper flow passage 111 form an upper flow passage 101; the left seat body lower flow passage 122 and the right seat body lower flow passage 132 are both in communication with the middle lower flow passage 112, and the left seat body lower flow passage 122, the right seat body lower flow passage 132 and the middle lower flow passage 112 form the lower flow passage 102.
When valve pieces 200 with different specifications need to be tested, the size of the middle shell 110 needs to be adjusted according to the size of the valve pieces 200, and because the middle shell 110 is detachably connected with the left motor base 120 and the right motor base 130, the middle shell 110 provided with the valve pieces 200 with different specifications can be connected between the left motor base 120 and the right motor base 130, so that the valve fatigue life testing device can support the testing of the valve pieces 200 with more specifications. The structure enables the device of the invention to realize a modular design, and the two linear motors 300 are respectively loaded on the left motor base 120 and the right motor base 130, so that the body 100 can be flexibly replaced and adjusted according to test requirements.
In this embodiment, the detachable connection between the left side of the middle housing 110 and the right side of the left motor base 120 may be a screw connection, a bolt connection, or a snap connection; the detachable connection between the right side of the middle housing 110 and the left side of the right motor mount 130 may be a screw connection, a bolt connection, a snap connection, or the like.
The device of the invention meets the requirement of multi-specification test by replacing the middle shell 110; the dual linear motor 300 load application and design concept can be used to test other cardiovascular devices or other related devices.
The left motor base 120 and the right motor base 130 are both provided with fans 500. Fan 500 cools down left motor cabinet 120 and right motor cabinet 130, and in this embodiment, two fans 500 set up respectively in the top of left motor cabinet 120 and right motor cabinet 130.
The left motor base 120 is provided with an inlet valve 610, the right motor base 130 is provided with an outlet valve 620, the inlet valve 610 is positioned at the upper part of the upper layer flow channel 101, and the outlet valve 620 is positioned at the lower part of the upper layer flow channel 101. The level of the inlet valve 610 is higher than the level of the outlet valve 620; this structure facilitates the stable and rapid filling of the body 100 with the test solution.
Valve fatigue life testing arrangement, still include the liquid heating subassembly, the liquid heating subassembly includes the infusion case 710 with inlet valve 610 and outlet valve 620 all communicate, be equipped with the water pump on the infusion case 710, infusion case 710 is connected with heating part 720, infusion case 710 is connected with temperature test part 730, temperature test part 730 sends the temperature value of the test liquid in the infusion case 710 that detects to heating part 720, heating part 720 is according to the temperature value of the test liquid who obtains, the temperature that the adjustment was heated to infusion case 710, so that the temperature of the test liquid in body 100 keeps in preset temperature range.
The heating member 720 in this embodiment may be a heating furnace, a heating wire, or the like. The temperature testing unit 730 may be a thermometer.
Because the left motor base 120 is provided with the inlet valve 610, the right motor base 130 is provided with the outlet valve 620, the inlet valve 610 is positioned at the upper part of the upper flow channel 101, and the outlet valve 620 is positioned at the lower part of the upper flow channel 101, after the infusion tank 710 is connected with the inlet valve 610 and the outlet valve 620, the test liquid in the infusion tank 710 and the test liquid in the body 100 can form circulation; in addition, because the temperature value of the test solution in the infusion case 710 is transmitted to the heating part 720, the heating part 720 adjusts the temperature for heating the infusion case 710 according to the acquired temperature value, so that the temperature of the test solution in the infusion case 710 can be ensured to be kept in the temperature range required by the test, and the temperature of the test solution circularly entering the body 100 can be kept in the preset temperature range. In this embodiment, the test fluid in the fluid tank 710 can be maintained at 37 degrees Celsius. The infusion box 710 is provided with a water pump for providing power for the flow of the test liquid.
A drain valve 630 is provided on the lower flow passage 102. The provision of drain valve 630 can facilitate rapid draining of the liquid.
A damper 810 is provided in the middle lower flow passage 112 of the middle housing 110. This structure makes the installation of the damper 810 convenient and makes the structure of the body 100 more compact.
For better control of the detection result, both linear motors 300 are connected to a pwm controller for controlling the operation of both linear motors 300.
Each linear motor 300 is provided with a hall sensor therein, and each hall sensor is connected to a pwm controller. The hall sensor arranged on the linear motor 300 is connected with the pulse width modulation controller, receives the running signal feedback of the linear motor 300 and adjusts the running state of the linear motor 300, so that the running state of the linear motor 300 under the long-term test condition can be stabilized. In the conventional testing device adopting the single linear motor 300, because no hall sensor is arranged, the running state of the linear motor 300 fluctuates in the long-term testing process.
In order to detect the pressure in the device, the valve fatigue life testing device further comprises two pressure sensors 900 mounted on the body 100, wherein the two pressure sensors 900 are respectively used for detecting the pressure in the left cavity 1011 and the right cavity 1012.
Valve fatigue life testing arrangement includes at least four module components. The device of the embodiment comprises four module assemblies, and each module assembly is an independent testing body. The four module assemblies are used for measuring 4 valve pieces 200, wherein 3 valve pieces 200 to be measured; the remaining one was compared using a national standard valve member 200. Thus, a plurality of valve pieces 200 are measured simultaneously, and compared with the test mode of the valve pieces 200 meeting the national standard, the final result can meet the requirements of ISO5840 and GB 12279.
The valve fatigue life testing device provided by the invention can be used for testing the fatigue life of the artificial heart valve and can also be used for testing the fatigue life of other cardiovascular related products. In this embodiment, the valve member 200 is a prosthetic heart valve.
The valve fixer 210 is provided with two fixer through holes 211 used for being communicated with the upper flow channel 101, and the two fixer through holes 211 are positioned on the same longitudinal axis with the opening at the bottom of the air container 400 used for being communicated with the body 100. The through holes 211 of the holder can facilitate the flow of the test solution inside and outside the valve holder 210.
In order to better observe the open and closed state of the valve member 200, a left transparent observation window 123 is provided on the left side of the left cavity 1011, and a right transparent observation window is provided on the right side of the right cavity 1012.
The operation method of the device of the embodiment comprises the following steps:
firstly, fixing a valve piece 200 to be tested on a valve fixer 210; secondly, the valve holder 210 is put in through the left opening of the upper flow channel 101 of the middle housing 110; then, the left motor base 120 and the left motor base 120 are respectively communicated with the left side and the right side of the middle shell 110;
then, the test liquid is introduced through the inlet valve 610 of the left motor base 120, and the middle shell 110, the left motor base 120 and the right motor base 130 are in a communicated state, so that the whole body 100 is filled with the test liquid; when the test solution is introduced, the luer connector above the gas container 400 needs to be opened first, so that the test solution can enter the gas container 400; closing the luer connector after the whole body 100 is filled with the liquid to be tested; the environment in the valve fatigue life testing device of the embodiment is detected and monitored through the pressure sensor 900;
the testing liquid in the valve fatigue life testing device of the embodiment can be maintained at 37 degrees according to the testing requirement, and the temperature is controlled by the temperature testing part 730 of the valve fatigue life testing device of the embodiment. The testing liquid in the body 100 of the valve fatigue life testing device of the embodiment is connected with the external infusion box 710, and the testing liquid in the infusion box 710 is introduced into the body 100 through the water pump;
starting the linear motors 300 loaded on the tops of the left motor base 120 and the right motor base 130, wherein the linear motors 300 directly act on the lower test liquid through the pistons 310 with rolling diaphragms; the linear motor 300 loaded on the top of the left motor base 120 moves downwards, the linear motor 300 loaded on the top of the right motor base 130 moves upwards, loads in the same direction are transmitted to the valve piece 200 through the test liquid, and resultant force is formed to open the valve piece 200; at this time, the linear motor 300 loaded on the top of the left motor base 120 moves upwards, the linear motor 300 loaded on the top of the right motor base 130 moves downwards, the loads in the same direction are transmitted to the valve piece 200 through the test liquid, and resultant force is formed to close the valve piece 200; during testing, the pressure applied to the valve member 200 in the open or closed state can be changed by adjusting the volume of the gas in the gas container 400, thereby achieving the standard test state. After the test is completed, the test solution is discharged through the drain valve 630 on the side of the body 100.
In the valve fatigue life testing device of the present embodiment, the valve member 200 is placed transversely, which means that the central axis of the valve member 200 is in the same direction as the left and right directions of the valve fatigue life testing device of the present embodiment; the left and right directions of the valve fatigue life testing device are the transverse directions of the valve fatigue life testing device, and the central axis of the valve piece 200 is in the same transverse direction as the valve fatigue life testing device.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A valve fatigue life testing device, comprising: at least one module assembly, which comprises a body (100), wherein the body (100) is internally provided with an upper layer flow passage (101) and a lower layer flow passage (102) which are communicated with each other; the method is characterized in that:
the upper-layer runner (101) comprises a valve fixer (210) for fixing a valve piece (200), and the valve piece (200) fixed on the valve fixer (210) divides the upper-layer runner (101) of the body (100) into a left cavity (1011) and a right cavity (1012) along the horizontal direction;
the left side and the right side of the top of the body (100) are respectively provided with a linear motor (300), the linear motor (300) is connected with a piston (310) with a rolling diaphragm, and the piston (310) is arranged in the body (100) in an extending manner;
the top of the body (100) is also provided with two air containers (400), the two air containers (400) are respectively communicated with the left cavity (1011) and the right cavity (1012), and the pressure transmitted by the two air containers (400) to the corresponding left cavity (1011) and the right cavity (1012) is adjustable;
the two linear motors (300) generate motions with the same frequency and opposite phases through current control, load waveforms are directly applied to test liquid filled in a left cavity (1011) and a right cavity (1012) of the body (100), the test liquid transmits received loads to the left side and the right side of the valve piece (200) which are transversely arranged, the same-direction loads are applied to the two ends of the valve piece (200), and the valve piece (200) is opened or closed.
2. The valve fatigue life testing device of claim 1, wherein:
the body (100) comprises a middle shell (110), the left side of the middle shell (110) is detachably connected with a left motor base (120), and the right side of the middle shell (110) is detachably connected with a right motor base (130);
the middle shell (110) is provided with a middle upper flow passage (111) and a middle lower flow passage (112) which are communicated with each other, and the valve fixer (210) and the valve piece (200) are both arranged in the middle upper flow passage (111);
the left motor base (120) is provided with a left base body upper flow passage (121) and a left base body lower flow passage (122), and the right motor base (130) is provided with a right base body upper flow passage (131) and a right base body lower flow passage (132); the linear motor (300) is respectively arranged in the left motor base (120) and the right motor base (130);
the left side seat body upper flow passage (121) and the right side seat body upper flow passage (131) are both communicated with the middle part upper flow passage (111);
the left side seat body lower runner (122) and the right side seat body lower runner (132) are both communicated with the middle part lower runner (112).
3. The valve fatigue life testing device of claim 2, wherein: and fans (500) are respectively arranged on the left motor base (120) and the right motor base (130).
4. The valve fatigue life testing device of claim 2, wherein: the left motor base (120) is provided with an inlet valve (610), and the right motor base (130) is provided with an outlet valve (620); the inlet valve (610) is positioned at the upper part of the upper layer flow passage (101), and the outlet valve (620) is positioned at the lower part of the upper layer flow passage (101).
5. The valve fatigue life testing device of claim 4, wherein: still include the liquid heating subassembly, the liquid heating subassembly include with import valve (610) with infusion case (710) that outlet valve (620) all communicate, be equipped with the water pump on infusion case (710), infusion case (710) are connected with heating block (720), infusion case (710) are connected with temperature test part (730), temperature test part (730) will be detected the temperature numerical value of the test liquid in infusion case (710) conveys heating block (720), heating block (720) are according to the temperature numerical value of the test liquid of obtaining, and the adjustment is right the temperature that infusion case (710) heated.
6. The valve fatigue life testing device of claim 4, wherein: and a liquid discharge valve (630) is arranged on the lower-layer flow passage (102).
7. The valve fatigue life testing device of claim 2, wherein: a damper (810) is disposed in the middle lower flow passage (112) of the middle housing (110).
8. The valve fatigue life testing device of claim 1, wherein: the two linear motors (300) are both connected with a pulse width modulation controller, and the pulse width modulation controller is used for controlling the operation of the two linear motors (300).
9. The valve fatigue life testing device of claim 8, wherein: and a Hall sensor is arranged in each linear motor (300), and each Hall sensor is connected with the pulse width modulation controller.
10. The valve fatigue life testing device of claim 1, wherein: the pressure sensor (900) is arranged on the body (100), and the two pressure sensors (900) are respectively used for detecting the pressure in the left cavity (1011) and the right cavity (1012).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811353822.2A CN111189693A (en) | 2018-11-14 | 2018-11-14 | Valve fatigue life testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811353822.2A CN111189693A (en) | 2018-11-14 | 2018-11-14 | Valve fatigue life testing device |
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| CN111189693A true CN111189693A (en) | 2020-05-22 |
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|---|---|---|---|
| CN201811353822.2A Pending CN111189693A (en) | 2018-11-14 | 2018-11-14 | Valve fatigue life testing device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982667A (en) * | 2020-08-17 | 2020-11-24 | 四川大学 | Heart valve clamp |
| CN113706987A (en) * | 2021-09-28 | 2021-11-26 | 大连理工大学 | Physical platform for simulating typical pulmonary hypertension generation and development process |
| CN117232814A (en) * | 2023-11-14 | 2023-12-15 | 安徽农业大学 | Device for testing bursting pressure of artificial heart valve |
-
2018
- 2018-11-14 CN CN201811353822.2A patent/CN111189693A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111982667A (en) * | 2020-08-17 | 2020-11-24 | 四川大学 | Heart valve clamp |
| CN111982667B (en) * | 2020-08-17 | 2023-06-13 | 四川大学 | Heart valve clamp |
| CN113706987A (en) * | 2021-09-28 | 2021-11-26 | 大连理工大学 | Physical platform for simulating typical pulmonary hypertension generation and development process |
| CN117232814A (en) * | 2023-11-14 | 2023-12-15 | 安徽农业大学 | Device for testing bursting pressure of artificial heart valve |
| CN117232814B (en) * | 2023-11-14 | 2024-01-30 | 安徽农业大学 | Device for testing bursting pressure of artificial heart valve |
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