WO2022199154A1

WO2022199154A1 - Valve durability testing device

Info

Publication number: WO2022199154A1
Application number: PCT/CN2021/139374
Authority: WO
Inventors: 苏陆予; 金益鑫; 冀丽军; 刘世红; 庄晓峰; 陈国明
Original assignee: 上海微创心通医疗科技有限公司
Priority date: 2021-03-22
Filing date: 2021-12-17
Publication date: 2022-09-29
Also published as: CN115105251A; AU2021435599A1

Abstract

A device for testing durability of a valve (10), comprising: a shell (100) having an inner cavity, wherein the inner cavity is used for containing a liquid medium (401), the shell (100) is provided with a first observation window (101), and the first observation window (101) is used for observing the valve (10) provided in the inner cavity; a fixed module (200) provided in the inner cavity and used for mounting a valve (10) to be tested; and a strobe light provided in the inner cavity and comprising a plurality of flash sources (301), the plurality of flash sources (301) being arranged around an axis of the fixed module (200). By arranging the strobe light and using the visual persistence principle, it is convenient for an observer to observe the motion condition of the valve (10), and the strobe light is provided in the inner cavity, and the plurality of flash sources (301) of the strobe light are arranged around the axis of the first observation window (101), such that the dead angle is reduced, and the illumination uniformity is improved.

Description

A test device for valve durability

technical field

The invention relates to the technical field of testing devices for medical instruments, in particular to a testing device for valve durability.

Background technique

With the development of society and the aging of the population, the incidence of valvular heart disease has increased significantly. Studies have shown that the incidence of valvular heart disease in the elderly over 75 years old is as high as 13.3%. At present, traditional surgery is still the first choice for patients with severe valvular disease, but for the elderly, patients with multiple organ diseases, a history of thoracotomy, and poor cardiac function, traditional surgery has high risks and high mortality. , some patients do not even have the opportunity for surgery. In recent years, transcatheter heart valve surgery has received extensive attention from experts and scholars due to its advantages such as no need for thoracotomy, less trauma, and faster patient recovery.

Transcatheter heart valves require durability testing before they can be put into clinical use. Taking the transcatheter aortic valve as an example, the durability test requires that the transcatheter aortic valve can survive at least 200 million cycles without failure when the pressure conditions are met. Common failures include perforation, tearing, leaflet delamination, valve wear, regurgitation, rupture, excessive deformation, failure of individual components, and other mechanical damage and wear. In order to understand the durability failure of the transcatheter aortic valve and analyze the cause of failure, it is necessary to observe the movement of the valve many times during the test process, but the valve usually circulates at a higher frequency during the durability test, and the naked eye is very Difficult to observe carefully.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a valve durability test device to assist the observer to observe the valve movement.

In order to achieve the above object, the present invention provides a test device for valve durability, comprising:

a casing, which has an inner cavity, the inner cavity is used for accommodating a liquid medium, and the casing is provided with a first observation window, and the first observation window is used to observe the valve located in the inner cavity;

a fixation module disposed in the lumen and used to mount the valve; and,

A strobe light is disposed in the inner cavity and includes a plurality of flash light sources, and the plurality of flash light sources are arranged around the axis of the fixed module.

Optionally, the axis of the first observation window and the axis of the fixing module are parallel to each other.

Optionally, in the axial direction of the fixing module, the distance from any one of the flash sources to the first observation window is smaller than the distance from any point on the valve to the first observation window.

Optionally, in the direction perpendicular to the axis of the fixing module, the distance from any one of the flash sources to the axis of the valve is greater than or equal to the distance from any point on the valve to the axis of the valve.

Optionally, a plurality of the flash light sources are arranged symmetrically around the axis of the fixed module.

Optionally, the testing device further includes an isolation cover, which is arranged on the strobe light and isolates the flash source from the liquid medium.

Optionally, the testing device further includes an adjustment mechanism, which is electrically connected to the strobe light and used to adjust the flickering frequency of the strobe light.

Optionally, the testing device further includes a drive mechanism and a control mechanism; the drive mechanism is used to drive the valve to switch between an open state and a closed state; the control mechanism, the drive mechanism and the strobe The lamp is connected in communication for adjusting the blinking frequency of the strobe lamp according to the operating frequency of the driving mechanism.

Optionally, the driving mechanism includes a connected solution pump and a power source; the solution pump is arranged in the inner cavity and is used to be immersed in the liquid medium; the power source is used to drive the solution the pump moves in a direction toward or away from the valve; the power source is in communication with the control mechanism;

The test device is configured such that when the power source drives the solution pump in a first direction, the liquid medium creates a pressure differential between the inflow and outflow ends of the valve and causes the valve to move in a first direction. open under the action of the pressure difference; when the power source drives the solution pump to move in a second direction, the pressure difference is released and the valve is closed; the second direction is opposite to the first direction .

Optionally, the inner cavity is further used to accommodate a gas medium, and the gas medium is located on a side of the liquid medium away from the first observation window.

Optionally, the fixing module is movably arranged in the inner cavity; the driving mechanism is at least partially arranged in the inner cavity and connected with the fixing module, and the driving mechanism is used to drive the The fixed module drives the valve to reciprocate;

the testing device is configured such that the liquid medium creates a pressure differential between the inflow and outflow ends of the valve when the drive mechanism urges the valve to move in a direction from the outflow end of the valve toward the inflow end, The valve is opened under the action of the pressure difference; when the driving mechanism drives the valve to move in the direction from the inflow end of the valve to the outflow end, the pressure difference is released and the valve is closed.

Optionally, the driving mechanism includes a power source and a transmission part that are connected to each other, the power source is disposed outside the casing and is connected in communication with the control mechanism; a part of the transmission part is located in the casing The outside is connected with the power source, and the other part extends into the inner cavity and is connected with the fixed module;

The driving mechanism further includes a first buffer member disposed between the power source and the casing; and/or the driving mechanism includes a second buffer member located outside the casing and disposed at the between the housing and the transmission part.

Optionally, the testing device further includes a temperature maintaining mechanism for maintaining the liquid medium at a predetermined temperature; and/or the testing device further includes a pressure monitoring mechanism, provided on the housing, for monitoring the pressure at the axial ends of the valve.

Compared with the prior art, the valve durability testing device of the present invention has the following advantages:

First, the aforementioned valve durability testing device includes a casing, a mounting bracket and a strobe light; wherein, the casing has an inner cavity, the inner cavity is used for accommodating a liquid medium, and the casing is provided with an inner cavity. There is a first observation window, and the first observation window is used for observing the valve located in the inner cavity; the fixing module is arranged in the inner cavity and is used for installing the valve. The strobe light is disposed in the lumen and includes a plurality of flash light sources arranged around the axis of the valve. By adjusting the flickering frequency of the strobe light to be equal to the movement frequency of the valve, the movement of the valve can be observed by the phenomenon of persistence of vision. In particular, the strobe light is installed in the inner cavity, and the The multiple light sources of the strobe light are arranged around the axis of the valve, so that the light of the strobe light can be irradiated on the valve in a surrounding manner, which is convenient for observation, and also avoids the light of the strobe light from being reflected or reflected, which is unfavorable for observation.

Second, when the axis of the first observation window and the axis of the valve are parallel to each other, in the axial direction of the valve, the distance from any one of the flash sources to the first observation window is smaller than any one on the valve. The distance from one point to the first observation window to avoid light shadows and affect observation. Further, in the direction perpendicular to the axis of the first observation window, the distance from any one of the flash sources to the axis of the first observation window is greater than the distance from any point on the valve to the axis of the first observation window. distance to avoid the strobe light blocking the observation channel.

Third, the testing device further includes a drive mechanism and a control mechanism, the drive mechanism is used to drive the valve to switch between an open state and a closed state; the control mechanism, the drive mechanism and the strobe light The communication connection is used to adjust the flickering frequency of the strobe light according to the operating frequency of the driving mechanism, so that the flickering frequency of the strobe light can be quickly adapted to the motion frequency of the valve, thereby improving the test efficiency.

Description of drawings

The accompanying drawings are used for better understanding of the present invention and do not constitute an improper limitation of the present invention. in:

1 is a schematic structural diagram of a valve durability testing device provided according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the arrangement of the strobe lights of the valve durability testing device according to an embodiment of the present invention;

3 is a schematic diagram of a connection relationship between a strobe light, a drive mechanism, an adjustment mechanism and a control mechanism of a valve durability testing device according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a valve durability testing device according to another embodiment of the present invention.

[reference numerals are explained below]:

10 - valve;

100-shell, 101-first observation window, 102-second observation window;

200 - fixed module;

301 - flash source;

401- liquid medium, 402- gas medium;

500-drive mechanism, 501-solution pump, 502-power source, 503-transmission part, 503a-connecting block, 503b-rod, 504-first buffer, 505-second buffer;

600 - control mechanism;

700 - Adjustment mechanism;

800 - isolation cover;

901 - heating rod, 902 - pressure monitoring mechanism.

Detailed ways

The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in this embodiment are only to illustrate the basic concept of the present invention in a schematic way, so the drawings only show the components related to the present invention rather than the number, shape and the number of components in actual implementation. For dimension drawing, the type, quantity and proportion of each component can be changed at will in actual implementation, and the component layout may also be more complicated.

In addition, each embodiment of the following description has one or more technical features, but this does not mean that the person using the present invention must implement all the technical features in any embodiment at the same time, or can only implement different embodiments separately. One or all of the technical features of the . In other words, under the premise of possible implementation, those skilled in the art can selectively implement some or all of the technical features in any embodiment according to the disclosure of the present invention and depending on design specifications or implementation requirements, or The combination of some or all of the technical features in the multiple embodiments is selectively implemented, thereby increasing the flexibility of the implementation of the present invention.

As used in this specification, the singular forms "a," "an," and "the" include plural referents, and the plural forms "a plurality" include two or more referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise, and the terms "installed", "connected", "connected" shall be To be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements. The term "valve" refers to an artificial valve, that is, an artificial organ that can be implanted in the human body to replace the original valve, can ensure one-way blood flow, and has the function of the original valve, including artificial heart valves and other artificial blood vessels. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In order to make the objects, advantages and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that, the accompanying drawings are all in a very simplified form and in inaccurate scales, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention. The same or similar reference numbers in the drawings represent the same or similar parts.

FIG. 1 shows a schematic structural diagram of a valve durability test device provided by an embodiment of the present invention, and FIG. 2 shows a schematic diagram of the arrangement of strobe lights in the test device.

Please refer to FIG. 1 and FIG. 2 , the testing device includes a casing 100 , a fixing module 200 and a strobe light. Wherein, the housing 100 has an inner cavity, and the inner cavity is used for accommodating a liquid medium 401, such as water, physiological saline, etc., which is used to simulate the blood environment in the human body. The casing 100 is provided with a first observation window 101 , and the first observation window 101 is used to observe the valve 10 located in the lumen. The fixing module 200 is arranged in the lumen and is used to install the valve 10 . The strobe light is arranged in the inner cavity, and includes a plurality of flash light sources 301 , and the plurality of flash light sources 301 are arranged around the axis of the fixed module 200 .

The first observation window 101 may be composed of a window opened on one end of the housing 100 and a transparent cover plate covering the window. In actual work, if the observer wishes to observe the valve 10 from the outflow end of the valve 10, the outflow end of the valve 10 can be made closer to the first observation window 101, or the observer wishes to observe the valve 10 from the outflow end of the valve 10. When the inflow end of the valve 10 is observed, the inflow end of the valve 10 can be made closer to the first observation window 101 . Alternatively, strobe lights can also be provided at the outflow and/or inflow ends of the valve 10 . It can be understood that the axis of the valve 10 refers to the direction parallel to the blood flow direction after the valve 10 is implanted into the heart, and in the direction perpendicular to the axis of the valve 10, the cross-section of the valve 10 is annular, For example, regular shapes such as circles and ovals, or irregular shapes such as D-shapes, etc. In order to facilitate the observation of the valve 10 , the first observation window 101 may be a regular shape such as a circle or an ellipse, and preferably, the area of the first observation window 101 is larger than the cross-sectional area of the valve 10 . The outflow end of the valve 10 refers to the end where blood flows out of the valve 10 after the valve is implanted into the heart, and the inflow end of the valve 10 refers to the end where blood flows into the valve 10 . In addition, in the embodiment of the present invention, the opening direction of the first observation window 101 is not limited, and can be selected to be parallel to, overlapping or forming a certain angle with the axis of the fixing module 200. Preferably, the axis of the first observation window 101 and the axis of the fixing module 200 are parallel to each other, and more preferably they are coincident. In general, the axis of the valve 10 installed on the fixing module 200 is parallel or overlapping with the axis of the fixing module 200, and both are parallel to the flow direction of the solution medium; of course, the present invention does not limit the setting of the fixing module 200 and the valve 10 The method can be set by those skilled in the art according to the requirements, which all belong to the inventive concept of the present invention. In some embodiments of the present invention, the axis of the fixing module 200 overlaps with the axis of the valve 10, so that after the valve 10 is installed, the axis of the valve 10 coincides with the axis of the first observation window 101, which is convenient The observer observes the valve 10 along the axial direction of the valve 10 .

When the valve 10 is used for the durability test and the valve movement needs to be observed, the flickering frequency f ₁ of the strobe light is adjusted to match the movement frequency f ₂ of the valve 10 to use The valve 10 is observed for the phenomenon of persistence of vision. It should be known that the valve 10 is cyclically switched between the open state and the closed state during the durability test, and the movement frequency f2 of the valve ₁₀ refers to the frequency of the valve 10 switching between the two states. The adaptation of f ₁ and f ₂ described herein means that f ₁ and f ₂ satisfy the following relationship: 0.5f ₂ <f ₁ ≤f ₂ . In this way, due to the phenomenon of persistence of vision, the valve 10 moves at the frequency of (f ₂ -f ₁ )×f ₂ /f ₁ in the eyes of the human eye. By setting appropriate values of f ₁ and f ₂ , the valve 10 can be The valve 10 moves at a relatively high frequency and can be recognized by the human eye, which facilitates observation of the movement of the valve 10 . The valve durability test is an accelerated test, so the motion frequency f2 of the valve ₁₀ is usually greater than 300 times/min.

By arranging the strobe light in the inner cavity of the housing 100, on the one hand, the obstruction of the observation path caused by the hand-held strobe device itself in the traditional external hand-held strobe device is avoided, and on the other hand , compared with arranging the strobe light outside the casing 100 , no reflection or reflection will be generated at the first observation window 101 , which is more convenient for observation. Especially when the multiple flash sources 301 of the strobe light are arranged around the axis of the fixing module 200, the dead angle of lighting can be reduced. The valve 10 can be evenly irradiated from the circumferential direction of the valve 10, which is more convenient for the observer to observe carefully, further reduces the dead angle of lighting, reduces the shadow around the valve, and effectively improves the observation and recording quality of the valve motion. The flash light source 301 is preferably an LED light source, which is smaller in size and more suitable for being arranged in the inner cavity, with low power consumption, high luminous efficiency, and long service life, and the LED light source has low heat generation, which can reduce the impact on the valve 10. influences.

In more detail, please continue to refer to FIG. 1 and FIG. 2 , when the axis of the first observation window 101 and the axis of the fixing module 200 are parallel to each other, in the axial direction of the fixing module 200 , the frequency The distance from any one of the flash sources 301 of the flash lamp to the first observation window 101 is smaller than the distance from any point on the valve 10 to the first observation window 101, that is, taking the orientation shown in FIG. 1 as an example, all The flash sources 301 are all located above the valve 10 to avoid light shadows and affect observation. Further, in the direction perpendicular to the axis of the fixed module 200, the distance from any one of the flash sources 301 to the axis of the valve 10 is greater than the distance from any point on the valve 10 to the axis of the valve 10, so The setting prevents the flash source 301 from blocking the viewing channel. The above arrangement can be achieved when a plurality of the flash light sources 301 are arranged on the inner top wall of the housing 100 . In order to expand the applicability of the valve durability testing device, the angle between the flash source 301 or the strobe light as a whole and the axis of the fixing module 200 can be set to be adjustable.

As mentioned above, the valve 10 needs to be cyclically switched between the open and closed states during the testing process, which can be achieved by the driving mechanism 500 . In detail, please continue to refer to FIG. 1 , in an exemplary embodiment, the driving mechanism 500 includes a solution pump 501 and a power source 502 . The solution pump 501 is arranged in the inner cavity and is used to be immersed in the liquid medium 401, a part of the power source 502 can be arranged outside the housing 100, and the other part can extend into the inner cavity and connected with the solution pump 501 to drive the solution pump 501 to move in a direction close to or away from the valve, so that the liquid medium 401 generates a pressure difference between the inflow end and the outflow end of the valve, And under the action of the pressure difference, the valve 10 is opened or closed.

More specifically, please continue to refer to FIG. 1 , the driving mechanism 500 can be disposed on the side of the valve 10 away from the first observation window 101 to prevent the driving mechanism 500 from blocking the observation channel. When the outflow end of the valve 10 is closer to the first observation window 101 , the driving mechanism 500 is disposed close to the inflow end of the valve 10 . In this way, when the power source 502 drives the solution pump 501 to move in the first direction, the solution pump 501 drives the liquid medium 401 to enter the valve interior 10 from the inflow end of the valve 10 , so that the valve 10 The pressure at the inflow end is greater than the pressure at the outflow end to cause the valve 10 to open. Conversely, when the power source 502 drives the solution pump 501 to move in a second direction opposite to the first direction, the pressure difference is released and the valve 10 is closed. In this embodiment, the first direction is the direction in which the inflow end of the valve 10 faces the outflow end, and the second direction is the direction in which the outflow end of the valve 10 faces the inflow end, that is, when the solution pump 501 When moving in the first direction, the solution pump 501 is close to the valve 10 , and when the solution pump 501 is moving in the second direction, the solution pump 501 is away from the valve 10 .

Optionally, in order to avoid interference between the driving mechanism 500 and the valve 10, the longitudinal section of the inner cavity may be substantially U-shaped, wherein the first observation window 101 is provided at one end of the U-shaped structure , the other part of the power source 502 of the driving mechanism 500 can extend into the inner cavity from the other end of the U-shaped structure. In addition, the inner cavity is also used for accommodating a gas medium 402, such as compressed air, which is located on the side of the liquid medium 401 away from the first observation window 101, which is helpful for the solution When the pump 501 moves away from the valve 10 , the pressure difference on both sides of the valve 10 is prevented from changing too drastically, and the test conditions of the valve 10 are ensured to change smoothly and be easily monitored.

In an alternative embodiment, please refer to FIG. 4 , the fixing module 200 is movably arranged in the inner cavity. The driving mechanism 500 is at least partially disposed in the inner cavity and is connected with the fixing module 200 to drive the fixing module 200 to reciprocate and drive the valve 10 to move synchronously, thereby causing the valve 10 opening and closing movements.

In more detail, please continue to refer to FIG. 4 , when the driving mechanism 500 drives the fixing module 200 to drive the valve 10 to move in the direction from the outflow end of the valve to the inflow end, the liquid medium 401 is in the The pressure generated at the inflow end of the valve 10 is greater than the pressure at the outflow end of the valve 10 , that is, the liquid medium 401 forms a pressure difference between the inflow and outflow ends of the valve 10 to open the valve 10 . Conversely, when the driving mechanism 500 drives the fixing module 200 to drive the valve 10 to move in the direction from the inflow end of the valve 10 to the outflow end, the pressure difference is released and the valve 10 is closed.

Further, the driving mechanism 500 may include a power source 502 and a transmission part 503 . The power source 502 is disposed outside the casing 100 and connected to the casing 100 . A part of the transmission part 503 is arranged outside the casing 100 and is connected to the power source 502 , and another part of the transmission part 503 extends into the inner cavity and is connected to the fixing module 200 , It is used to drive the fixing module 200 to move along the axis direction of the first observation window 101 under the action of the power source 502 , and drive the valve 10 to move synchronously, so as to realize the opening or closing of the valve 10 .

Further, the driving mechanism 500 further includes a first buffer member 504 and a second buffer member 505 . The first buffer member 504 is, for example, a spring, which is disposed between the power source 502 and the housing 100 to buffer the vibration caused by the power source 502 during operation. The transmission part 503 includes a connecting block 503a and a rod 503b, wherein the connecting block 503a is disposed outside the housing 100 and connected to the power source 502, and one end of the rod 503b is connected to the connecting block. 503a is connected, and the other end extends into the inner cavity and is connected to the fixing module 200 . The second buffer member 505 is, for example, a bellows tube, which is disposed outside the housing 100 and is sleeved on the rod member 503b. One end of the second buffer member 505 is sealedly connected to the transmission portion 503 at the connecting block 503a, and the other end is sealed. One end is sealedly connected with the outer wall of the housing 100 to avoid leakage of the liquid medium, and the vibration caused by the movement of the transmission part 503 is slowed down through the expansion and contraction of the bellows.

In view of the above description, the movement frequency of the valve 10 is determined by the operating frequency of the driving mechanism 500 , so the flickering frequency f ₁ of the strobe light can be adjusted according to the operating frequency of the driving mechanism 500 . Preferably, as shown in FIG. 3 , the testing device may further include a control mechanism 600, the control mechanism 600 and the driving mechanism 500 (specifically, the power source 502, more specifically, the power source 502) and the strobe light (specifically, the control part of the strobe light) are connected in communication, for automatically adjusting the flashing frequency of the strobe light according to the operating frequency of the driving mechanism 500, so as to Quickly adapt the two to improve test efficiency. Not only that, the test device is also provided with an adjustment mechanism 700, which is electrically connected to the control part of the strobe light, and is used for the observer to manually adjust the flickering frequency of the strobe light.

In addition, it can be understood that, since the inner cavity contains a liquid medium for simulating the blood environment in the human body, in order to avoid the adverse effect of the liquid medium 401 on the flash light source 301, please refer back to FIG. 1 and FIG. 2, The testing device preferably further includes an isolation cover 800 , which is covered on the strobe light and isolates the liquid medium 401 from the flash light source 301 . Optionally, the isolation cover 800 may be an integral structure, covering all the flash light sources 301 at the same time, or the isolation cover includes a plurality of sub-isolation covers, each of which covers a part of the flash light source (not shown in the figure). The material of the isolation cover 800 may be transparent acrylic.

Further, the testing device further includes a temperature maintaining mechanism for maintaining the liquid medium 401 at a predetermined temperature, for example, about 37°C. The temperature maintaining mechanism can include a numerical control module, a temperature sensor and a heating rod 901, wherein the temperature sensor and the heating rod 901 can be arranged in the inner cavity and are respectively connected in communication with the numerical control module. The module is used for controlling the heating rod 901 to work according to the actual temperature of the liquid medium 401 sensed by the temperature sensor, so as to keep the liquid medium 401 at the predetermined temperature during the test. Not only that, the test device also includes a pressure monitoring mechanism 902, which is arranged on the housing 100 and is used to monitor the pressure at both ends of the valve 10 in the axial direction, so as to ensure that the valve 10 performs a durability test under a predetermined pressure condition .

In addition, in the embodiment of the present invention, a second observation window 102 parallel to the axis of the first observation window 101 may be provided on the casing 100 for observing the valve 10 from the side.

Although the present invention is disclosed above, it is not limited thereto. Various modifications and variations can be made in the present invention by those skilled in the art without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

A test device for valve durability, comprising:

a casing, which has an inner cavity, the inner cavity is used for accommodating a liquid medium, and the casing is provided with a first observation window, and the first observation window is used to observe the valve located in the inner cavity;

a fixation module disposed in the lumen and used to mount the valve; and,

The strobe light is arranged in the inner cavity and includes a plurality of flash light sources, and the plurality of flash light sources are arranged around the axis of the fixed module.
The device for testing valve durability according to claim 1, wherein the axis of the first observation window and the axis of the fixing module are parallel to or overlap with each other.
The device for testing valve durability according to claim 2, wherein in the axial direction of the fixed module, the distance from any one of the flash sources to the first observation window is smaller than any point on the valve distance to the first viewing window.
The device for testing valve durability according to claim 2, wherein in a direction perpendicular to the axis of the fixing module, the distance from any one of the flash sources to the axis of the valve is greater than or equal to the distance from the axis of the valve. The distance from any point on a valve to the axis of the valve.
The device for testing valve durability according to any one of claims 1 to 4, wherein a plurality of the flash light sources are centrally symmetrically arranged around the axis of the fixing module.
The valve durability test device according to claim 1, wherein the test device further comprises an isolation cover, the isolation cover is provided on the strobe light and isolates the flash source from the liquid medium.
The valve durability testing device according to claim 1, wherein the testing device further comprises an adjustment mechanism, the adjustment mechanism is electrically connected with the strobe light and used to adjust the flickering of the strobe light frequency.
The test device for valve durability according to claim 1 or 7, wherein the test device further comprises a driving mechanism and a control mechanism; the driving mechanism is used to drive the valve between an open state and a closed state Switching; the control mechanism is connected in communication with the driving mechanism and the strobe light, and is used for adjusting the flickering frequency of the strobe light according to the operating frequency of the driving mechanism.
The device for testing valve durability according to claim 8, wherein the driving mechanism comprises a connected solution pump and a power source; the solution pump is arranged in the inner cavity and is used to be immersed in the inside the liquid medium; the power source is used to drive the solution pump to move in a direction close to or away from the valve; the power source is connected in communication with the control mechanism;

The test device is configured such that when the power source drives the solution pump in a first direction, the liquid medium creates a pressure differential between the inflow and outflow ends of the valve and causes the valve to move in a first direction. open under the action of the pressure difference; when the power source drives the solution pump to move in a second direction, the pressure difference is released and the valve is closed; the second direction is opposite to the first direction .
The device for testing valve durability according to claim 9, wherein the inner cavity is further used to accommodate a gas medium, and the gas medium is located on a side of the liquid medium away from the first observation window.
The device for testing valve durability according to claim 8, wherein the fixing module is movably arranged in the inner cavity; the driving mechanism is at least partially arranged in the inner cavity and is connected with the inner cavity. The fixed module is connected, and the drive mechanism is used to drive the fixed module to drive the valve to reciprocate;

the testing device is configured such that the liquid medium creates a pressure differential between the inflow and outflow ends of the valve when the drive mechanism urges the valve to move in a direction from the outflow end of the valve toward the inflow end, The valve is opened under the action of the pressure difference; when the driving mechanism drives the valve to move in the direction from the inflow end of the valve to the outflow end, the pressure difference is released and the valve is closed.
The device for testing valve durability according to claim 10, wherein the driving mechanism comprises a power source and a transmission part that are connected to each other, the power source is provided outside the casing, and is connected with the control mechanism a communication connection; a part of the transmission part is located outside the casing and is connected with the power source, and the other part extends into the inner cavity and is connected with the fixed module;

The driving mechanism further includes a first buffer member disposed between the power source and the casing; and/or the driving mechanism includes a second buffer member located outside the casing and disposed at the between the housing and the transmission part.
The valve durability testing device according to claim 1, characterized in that, the testing device further comprises a temperature maintaining mechanism for keeping the liquid medium at a predetermined temperature; and/or, the testing device further comprises The pressure monitoring mechanism is arranged on the casing and is used for monitoring the pressure at both axial ends of the valve.