A pulsatile test bench

Abstract

This invention relates to a pulsation testing station, comprising a base, a flow channel mechanism mounted on the base, and a clamping mechanism. The flow channel mechanism and the clamping mechanism communicate to form a circulating flow channel. The clamping mechanism is used to clamp a valve to be tested and includes two opposing clamping parts. Each clamping part includes a cylinder, a slide cylinder, and a drive assembly. The cylinder has at least one flow channel opening, and the slide cylinder is slidably connected to the cylinder. The drive assembly drives the slide cylinder to slide. When the slide cylinder moves toward the cylinder, it closes the flow channel opening of the cylinder. When the slide cylinder moves away from the cylinder until the two clamping parts align to form a sealed flow channel, the inner cavity of the slide cylinder communicates with the flow channel opening. This invention's pulsation testing station features a clamping mechanism that functions as a stop valve, shortening the steps for disassembling and replacing the valve to be tested, improving replacement efficiency, and thus improving testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a pulsation testing station. Background Technology

[0002] The pulsation test stand is a device for testing the performance of artificial valves. It simulates the blood flow environment in the human body, thereby realistically reproducing the operating state of the artificial valve after implantation.

[0003] Currently, the preparation work for replacing an artificial valve after testing it on a pulse testing station is cumbersome. It requires first stopping the water flow, then opening the flow channel to remove the tested valve and install the valve to be tested, followed by reassembling the flow channel, and finally adjusting the flow channel environmental parameters until they match those of a real human body. Related technologies include pulse testing stations with stop valves, which require stopping the water flow first and then disassembling the flow channel to remove the tested valve. However, these cannot simultaneously perform the water stopping and valve installation / removal, making the preparation work for valve replacement still time-consuming.

[0004] On the other hand, when different types of artificial valves need to be replaced for testing, in addition to the aforementioned water closure and valve removal / reinstallation, preparation work also includes the disassembly and adjustment of the pulsation test station. For example, when replacing an aortic valve with a mitral valve, the fluid flow direction in the circulation channels of the test stations corresponding to the two valves is opposite, making it impossible to directly use the same pulsation test station for testing. In related technologies, the fluid flow direction in the circulation channel of the pulsation test station is switched by removing and repositioning the two water tanks of the test station and removing and reversing the one-way valve in the test station. The process of disassembling and reinstalling the water tanks and one-way valves is lengthy, and the removal and refilling of the water tanks prevents water from being stored in the flow channel, further prolonging the preparation time.

[0005] Clearly, in the existing technology, the preparation work for replacing artificial valves using a pulse test station is cumbersome and complicated, which seriously affects the testing efficiency and thus increases the cost. There is an urgent need for a pulse test station that can improve efficiency and reduce costs. Summary of the Invention

[0006] To address at least one of the aforementioned technical problems, the present invention proposes a pulsation test station.

[0007] According to some embodiments of the present invention, a pulsation test stage is provided, including a base, a flow channel mechanism and a clamping mechanism mounted on the base, wherein the flow channel mechanism and the clamping mechanism communicate to form a circulating flow channel, and the clamping mechanism is used to clamp a valve to be tested. The clamping mechanism includes two clamping parts disposed opposite to each other. Each clamping part includes a cylinder, a slide cylinder and a driving assembly. The cylinder has at least one flow channel opening, and the slide cylinder is slidably connected to the cylinder. The driving assembly is used to drive the slide cylinder to slide. When the slide cylinder moves toward the cylinder, it closes the flow channel opening of the cylinder. When the slide cylinder moves away from the cylinder until the two clamping parts are joined to form a closed flow channel, the inner cavity of the slide cylinder communicates with the flow channel opening.

[0008] In some possible implementations, the end of the slide tube located inside the inner cavity of the cylinder is the inner end, and the end of the slide tube located outside the cylinder is the outer end; the inner end moves between a first position and a second position, the first position being the position where the slide tube moves toward the cylinder to close the flow channel opening, and the second position being the position where the two clamping parts are joined to form a sealed flow channel.

[0009] In some possible implementations, the side wall of the slide tube has a water inlet corresponding to the flow channel opening of the cylinder body. When the slide tube moves toward the cylinder body, the outer side wall of the slide tube closes the flow channel opening of the cylinder body. When the slide tube moves away from the cylinder body to the point where the two clamping parts are joined to form a closed flow channel, the water inlet is connected to the flow channel opening of the cylinder body.

[0010] In some possible implementations, the drive assembly includes a rocker arm and a drive member. A first end of the rocker arm is rotatably mounted on the base, and a second end of the rocker arm is connected to the drive member. The rocker arm has a slot. A pin is provided at the outer end of the slide cylinder. The pin is located in the slot. After the drive member pushes and pulls the second end of the rocker arm, the slot can apply a driving force to the pin to drive the slide cylinder to slide axially.

[0011] In some possible implementations, the trajectory of the slot is an involute, and the center of the base circle of the involute is the rotation axis of the rocker arm. After the driving member pushes and pulls the second end of the rocker arm, the slot can apply a driving force along the axial direction of the slide to the pin, so as to drive the slide to slide axially.

[0012] In some possible implementations, the drive assembly includes two rocker arms, which are aligned vertically and positioned above and below the slide cylinder, respectively.

[0013] In some possible implementations, the drive element includes a quick clamp, the clamp's chuck being drive-connected to the second end of the rocker arm.

[0014] In some possible implementations, the drive element includes a motor or a cylinder.

[0015] In some possible implementations, the clamping mechanism further includes a coupling cylinder mounted on the outer end of the slide cylinder. The coupling cylinder is used to mount the valve to be tested. The coupling cylinder is equipped with a pressure sensor and / or a flow meter. The pressure sensor is used to detect the fluid pressure inside the coupling cylinder, and the flow meter is used to detect the fluid velocity inside the coupling cylinder.

[0016] In some possible implementations, an observation window is provided on one side of the cylinder body, the observation window is coaxial with the coupling cylinder, and a camera is also provided on the base, the camera being aimed at the observation window.

[0017] In some possible implementations, a mounting groove is provided at the bottom of the cylinder, and a heater is provided in the mounting groove.

[0018] In some possible implementations, the flow channel mechanism includes a reversing module and a chamber module. The chamber module includes a first chamber portion and a second chamber portion that are connected. The reversing module is used to switch the flow direction of the fluid in the circulating flow channel formed by the flow channel mechanism and the clamping mechanism.

[0019] In some possible implementations, the reversing module includes a reversing valve and a connecting channel, the reversing valve being slidably mounted at one end of the connecting channel, the reversing valve including two one-way valves in opposite directions, the reversing valve being slidable to switch the one-way valve located inside the connecting channel.

[0020] In some possible implementations, the reversing module includes a first three-way valve, a second three-way valve, a first pipe, and a second pipe. The first end of the first three-way valve is connected to the first chamber, the second end of the first three-way valve is connected to the first end of the first pipe, and the third end of the first three-way valve is connected to the first end of the second pipe. The first end of the second three-way valve is connected to the first clamping part, the second end of the second three-way valve is connected to the second end of the first pipe, and the third end of the second three-way valve is connected to the second end of the second pipe. The first pipe and the second pipe are respectively provided with one-way valves in opposite directions.

[0021] In some possible implementations, the first chamber includes a first water tank, the second chamber includes a second water tank, the first water tank and the second water tank are connected by a connecting pipe, and a pressure regulating device is provided on the connecting pipe for regulating the fluid pressure on both sides.

[0022] In some possible implementations, both the top of the first water tank and the top of the second water tank are provided with water injection holes for installing removable pressure caps. The removable pressure caps are provided with air inlets, and one of the first water tanks and the second water tank is equipped with the removable pressure cap.

[0023] Implementing this invention has the following beneficial effects:

[0024] When replacing the valve to be tested, the pulsation test stand of the present invention directly controls the sliding cylinder of the clamping mechanism to slide inward. During the sliding process, the sliding cylinder can block the flow channel opening on the cylinder body to prevent the fluid in the flow channel mechanism from flowing out. One action can simultaneously realize the separation of the clamping mechanism and the water stoppage of the flow channel. After the valve to be tested is installed, the sliding cylinder is controlled to slide outward. During the sliding process, the flow channel opening is opened and the water path is naturally connected. The valve is clamped at the same time as the water flow action is completed, thereby improving the speed of replacing the valve to be tested and thus improving the efficiency of pulsation testing.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention.

[0026] Other features and aspects of the invention will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0027] To more clearly illustrate the technical solutions and advantages in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This diagram shows an overall structural diagram of a pulsation test bench according to an embodiment of the present invention;

[0029] Figure 2 This diagram shows a front view of a pulsation test bench according to an embodiment of the present invention.

[0030] Figure 3 A rear view structural diagram of a pulsation test bench according to an embodiment of the present invention is shown;

[0031] Figure 4 A three-dimensional structural diagram of a pulsation test bench according to an embodiment of the present invention is shown;

[0032] Figure 5 A structural diagram of the clamping mechanism according to an embodiment of the present invention is shown;

[0033] Figure 6A structural diagram of the slot hole of the rocker arm according to an embodiment of the present invention is shown;

[0034] Figure 7 A structural diagram of the flow channel mechanism according to an embodiment of the present invention is shown;

[0035] Figure 8 A first state diagram of the first clamping part according to an embodiment of the present invention is shown;

[0036] Figure 9 This diagram shows a second state of the first clamping part according to an embodiment of the present invention;

[0037] Figure 10 This diagram illustrates the opening and closing states of a quick-release clamp according to an embodiment of the present invention.

[0038] Figure 11 A structural diagram of the cylinder block according to an embodiment of the present invention is shown;

[0039] Figure 12 A schematic diagram showing the clockwise flow direction of the circulation channel of the pulsation test bench according to an embodiment of the present invention is shown;

[0040] Figure 13 A schematic diagram showing the counterclockwise flow direction of the circulation channel of the pulsating test bench according to an embodiment of the present invention is shown;

[0041] Figure 14 A structural diagram of a reversing mechanism according to an embodiment of the present invention is shown;

[0042] Figure 15 A structural diagram of a reversing valve according to an embodiment of the present invention is shown;

[0043] Figure 16 A front view and a cross-sectional view of the connection channel according to an embodiment of the present invention are shown;

[0044] Figure 17 A structural block diagram of a second reversing mechanism according to an embodiment of the present invention is shown;

[0045] Figure 18 A structural diagram of the connecting block according to an embodiment of the present invention is shown;

[0046] Figure 19 A structural diagram of a vertical light source according to an embodiment of the present invention is shown;

[0047] Figure 20 A schematic diagram showing the heater installation position according to an embodiment of the present invention is provided.

[0048] In the picture:

[0049] 100. Base; 200. Clamping mechanism; 201. Cylinder body; 2011. Flow channel; 202. Slide cylinder; 2021. Pin; 203. Drive assembly; 2031. Rocker arm; 20311. Slot; 20312. Transmission rod; 2032. Drive component; 20321. Handle; 20322. Crank; 20323. Telescopic rod; 20324. Flathead screw; 204. Mating cylinder; 205. Slider; 210. First clamping part; 220. Second clamping part 300, Flow channel mechanism; 310, Reversing module; 311, Reversing valve; 3111, Check valve; 312, Connecting channel; 320, Chamber module; 321, First chamber section; 3211, First water tank; 322, Second chamber section; 3221, Second water tank; 3222, Connecting block; 330, Connecting pipe; 331, Pressure regulating device; 340, Isolation valve; 341, Isolation channel; 400, Camera; 410, Vertical light source; 500, Heater. Detailed Implementation

[0050] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0051] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0052] Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0053] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0054] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0055] Furthermore, to better illustrate the present invention, numerous specific details are set forth in the following detailed embodiments. Those skilled in the art will understand that the present invention can be practiced without certain specific details. In some instances, methods, means, elements, and circuits well known to those skilled in the art have not been described in detail in order to highlight the spirit of the invention.

[0056] The pulsation test stand is a device used to test the performance of artificial valves. Pulsation testing is a mandatory test for every artificial valve before it leaves the factory. Currently, after testing one artificial valve, the preparation work for replacing it for testing is cumbersome, resulting in low testing efficiency. Furthermore, existing pulsation test stands cannot test the pulsation performance of two different types of valves without reassembling and disassembling the internal one-way valve / valve. Because pulsation test stands are expensive, purchasing multiple stands is costly, and the time required for disassembling and reassembling the stand to replace the valve further reduces testing efficiency.

[0057] In related technologies, to improve the speed of valve replacement, there are pulsating test benches with stop valves. These benches require first stopping the water flow through the stop valve, then disassembling the flow channel to remove the tested artificial valve and install a new one to be tested. The flow channel is then reassembled, and finally, the flow channel environmental parameters are adjusted to match those of a real human body through water injection and pressurization. Because existing technologies do not simultaneously perform the water-stopping and valve removal / installation work, the preparation for artificial valve replacement remains cumbersome and complex, severely impacting testing efficiency.

[0058] In related technologies, to address the issue of testing different types of valves, there are pulsation test benches that can change the flow direction of the flow channel by changing the position of components. This is achieved by removing and repositioning the two water tanks of the test bench, and by removing and reversing the one-way valve in the test bench, thereby switching the fluid flow direction of the pulsation test bench's circulation channel to facilitate testing different types of valves. However, the process of disassembling and assembling the water tanks and the one-way valve is lengthy, and the removal and reassembly of the water tanks prevents water from being stored in the flow channel. Draining and refilling the water further prolongs the preparation time, thus significantly reducing testing efficiency.

[0059] In conclusion, it is essential to provide a pulsation test bench that can improve testing efficiency and reduce costs.

[0060] To address the aforementioned technical problems, this invention provides a pulsation testing station that can simultaneously perform water shut-off and valve disassembly / reassembly, thereby saving valve replacement time and improving pulsation testing efficiency.

[0061] Please refer to Figures 1-4 The pulsation test stand includes a base 100, a flow channel mechanism 300 mounted on the base 100, and a clamping mechanism 200. The flow channel mechanism 300 and the clamping mechanism 200 are connected to form a circulating flow channel. The clamping mechanism 200 is used to clamp the valve to be tested. The clamping mechanism 200 includes two clamping parts arranged opposite to each other, namely a first clamping part and a second clamping part. Based on the above structure, the first clamping part and the second clamping part respectively clamp both ends of the valve to be tested. Both the first clamping part and the second clamping part have cavities. The first clamping part and the second clamping part are joined to form a continuous flow channel. The valve to be tested is located within this continuous flow channel. The flow channel mechanism 300 is connected to both clamping parts, thereby forming a circulating flow channel. The circulating flow channel can simulate the environment of blood flow in the human body, so as to realize the function of testing the performance of the valve to be tested.

[0062] In this embodiment of the invention, the specific structure of the flow channel mechanism 300 is not limited. It should be understood that both the flow channel mechanism 300 and the clamping mechanism 200 are used to simulate human organs, such as the ventricle, atrium, and lungs. The human organs simulated by the flow channel mechanism 300 and the clamping mechanism 200 should correspond to the type of valve to be tested. For example, when the pulsation test stand performs left ventricular circuit (systemic circulation) simulation, if the valve to be tested is the aortic valve, then the first clamping part located upstream of the flow channel of the valve to be tested is connected to an external water pump to simulate the left ventricle. Correspondingly, the flow channel mechanism 300 needs to include a left atrial simulation part and a mitral valve simulation part. The atrial simulation part is connected to the first clamping part simulating the ventricle through the mitral valve simulation part. If the valve to be tested is the mitral valve, then the first clamping part and the second clamping part are used to simulate the left atrium and the left ventricle, respectively, and the flow channel mechanism 300 is used to simulate the lungs and blood vessels. Similarly, in addition to simulating the left ventricular circuit (systemic circulation), the pulsation test bench can also simulate the right ventricular circuit (pulmonary circulation). In this case, the organs simulated in each part of the pulsation test bench change again, which will not be elaborated on here.

[0063] In this embodiment, the two clamping parts in the clamping mechanism 200 have identical structures, that is, the first clamping part and the second clamping part have identical structures. Please refer to... Figure 5The clamping part includes a cylinder 201, a slide cylinder 202, and a drive assembly 203. The cylinder 201 has at least one flow channel port 2011, which communicates with the flow channel mechanism 300. The slide cylinder 202 is slidably connected to the cylinder 201. The drive assembly 203 is used to drive the slide cylinder 202 to slide. When the slide cylinder 202 moves toward the cylinder 201, it closes the flow channel port 2011 of the cylinder 201. When the slide cylinder 202 moves away from the cylinder 201 until the two clamping parts are joined to form a closed flow channel, the inner cavity of the slide cylinder 202 communicates with the flow channel port 2011.

[0064] In some embodiments, a mounting hole is provided on one side of the cylinder body 201. The end of the slide cylinder 202 located inside the inner cavity of the cylinder body 201 is the inner end, and the end of the slide cylinder 202 located outside the cylinder body 201 is the outer end. The inner end of the slide cylinder 202 is slidably mounted inside the inner cavity of the cylinder body 201 through the mounting hole, and the inner cavity of the cylinder body 201 matches the outer wall of the slide cylinder 202. The inner end of the slide cylinder 202 moves between a first position and a second position. The first position is the position where the slide cylinder 202 moves toward the cylinder body 201 to close its flow channel opening 2011, and the second position is the position when the two clamping parts are joined to form a sealed flow channel.

[0065] Based on the above structure, during the inward sliding process of the slide cylinder 202, the inner end of the slide cylinder 202 moves from the second position to the first position. Since the outer wall of the slide cylinder 202 matches the inner cavity of the cylinder body 201 (e.g., ...), ... Figure 11 (All shown are cylindrical). The outer wall of the slide cylinder 202 can block the flow channel opening 2011, preventing the fluid from the flow channel mechanism 300 from flowing into the clamping mechanism 200. However, as the slide cylinder 202 slides outward, its inner end moves from the first position to the second position, reopening the flow channel opening 2011 and allowing the fluid from the flow channel mechanism 300 to flow normally into the clamping mechanism 200. In other words, the slide cylinder 202 in the aforementioned clamping mechanism functions as a stop valve.

[0066] In other embodiments, the side wall of the slide cylinder 202 has a water inlet corresponding to the flow channel opening 2011 of the cylinder body 201. When the slide cylinder 202 moves toward the cylinder body 201, the outer side wall of the slide cylinder 202 closes the flow channel opening 2011 of the cylinder body 201. When the slide cylinder 202 moves away from the cylinder body 201 until the two clamping parts are joined to form a sealed flow channel, the aforementioned water inlet connects with the flow channel opening 2011 of the cylinder body 201. By having a water inlet corresponding to the flow channel opening 2011 on the slide cylinder 202, the inner cavity of the slide cylinder 202 can also be connected to the flow channel opening 2011 when the water inlet connects with the flow channel opening 2011.

[0067] Based on the clamping mechanism 200 with the aforementioned clamping structure, the preparation work for valve replacement testing on the pulsation test bench is simplified. Specifically, the two sliding cylinders 202 of the clamping mechanism 200 are directly controlled to slide by the drive assembly 203, so that the inner end of each sliding cylinder 202 moves from the second position to the first position. While sliding, the water-stopping action is completed, and the two sliding cylinders 202 move away from each other, facilitating the replacement of the valve to be tested. After replacement, the two sliding cylinders 202 of the clamping mechanism 200 are controlled to slide again by the drive assembly 203, so that the inner end of each sliding cylinder 202 moves from the first position to the second position, completing the water-passing action. At the same time, the two sliding cylinders 202 move closer together to clamp the valve. Since the clamping mechanism 200 can simultaneously achieve water-stopping and water-passing during opening and closing, water-stopping and valve disassembly / removal can be performed synchronously, thus increasing the speed of valve replacement and improving the efficiency of pulsation testing.

[0068] In some embodiments, the flow channel 2011 is located between the first position and the second position, and closer to the second position. "Closer to the second position" can be understood as being between the midpoint of the first and second positions and the second position itself. When the inner end of the slide 202 moves from the second position to the first position, the flow channel 2011 should be sealed as quickly as possible to prevent excessive fluid outflow from the flow channel mechanism 300. Therefore, the position of the flow channel 2011 should be as close to the second position as possible.

[0069] In this embodiment of the invention, the driving component 203 is used to provide a driving force to the slide 202 to drive the slide 202 to slide. Please refer to... Figures 8-10 The drive assembly 203 includes a rocker arm 2031 and a drive member 2032. The first end of the rocker arm 2031 is rotatably mounted on the base 100, and the second end of the rocker arm 2031 is connected to the drive member 2032. The rocker arm 2031 is provided with a slot 20311, and the outer end of the slide cylinder 202 is provided with a pin 2021. The pin 2021 is located in the slot 20311. After the drive member 2032 pushes and pulls the second end of the rocker arm 2031, the slot 20311 can apply a driving force to the pin 2021 to drive the slide cylinder 202 to slide along its axial direction.

[0070] The first end of the rocker arm 2031 is located behind the slide cylinder 202. A rotating shaft is provided on the base 100, and the first end of the rocker arm 2031 is rotatably mounted on the rotating shaft. The second end of the rocker arm 2031 is located in front of the slide cylinder 202, and the driving member 2032 is also located in front of the slide cylinder 202. The driving member 2032 can extend and retract in a straight line, and the extension and retraction direction of the driving member 2032 is parallel to the axis of the slide cylinder 202. During the extension and retraction process, the driving member 2032 drives the second end of the rocker arm 2031 to move, so that the rocker arm 2031 rotates around the rotating shaft of its first end. The slot 20311 is located between the first end and the second end of the rocker arm 2031. The slot 20311 is a straight hole or a curved hole with a certain length. When the slot 20311 is a straight hole, the straight hole always has an intersecting angle with the axis of the slide cylinder 202 during the rotation of the rocker arm 2031. The width of the slot 20311 matches the cross-sectional dimensions of the pin 2021. During the rotation of the rocker arm 2031, the wall of the slot 20311, which contacts the pin 2021, applies pressure to the pin, causing the slide cylinder 202 to slide. As the rocker arm 2031 rotates, the position of the pin 2021 within the slot 20311 continuously changes. Specifically, when the inner end of the slide cylinder 202 moves to the first position, the pin 2021 is located at the first point of the slot 20311; when the inner end of the slide cylinder 202 moves to the second position, the pin 2021 is located at the second point of the slot 20311.

[0071] Preferably, neither the first point nor the second point is the end point of the slot 20311. Since the thickness of the valve to be tested varies, the moving distance of the slide cylinder 202 may change when clamping valves of different thicknesses. That is, the first position and the second position will change. Correspondingly, the first point and the second point will also change. Therefore, the actual length of the slot 20311 should be greater than the length corresponding to the sliding limit of the slide cylinder to ensure that neither the first point nor the second point reaches the end point of the slot 20311.

[0072] It should be understood that during the rotation of the rocker arm 2031, the pressure of the slot 20311 on the pin 2021 (i.e., the driving force provided by the drive assembly 203) has at least a component in the axial direction of the slide cylinder 202 to ensure that the slide cylinder 202 can slide normally. Furthermore, to improve the smoothness of the slide cylinder 202's sliding, the pressure of the slot 20311 on the pin 2021 (i.e., the driving force provided by the drive assembly 203) should be as close as possible to the axial direction of the slide cylinder 202. To achieve the above effect, in some preferred embodiments, the direction of the pressure of the slot 20311 on the pin 2021 (i.e., the driving force provided by the drive assembly 203) is always in the axial direction of the slide cylinder 202. Specifically, please refer to... Figure 6The trajectory of the slot 20311 is an involute, and the center of the base circle of the involute is the rotation axis of the rocker arm 2031. After the driving component 2032 pushes or pulls the second end of the rocker arm 2031, the slot 20311 can apply a driving force along the axial direction of the slide cylinder 202 to the pin 2021, thereby driving the slide cylinder 202 to slide axially. Figure 6 As shown, the normal to any point on the involute curve is tangent to the base circle. The center of the base circle is at the rotation axis of the rocker arm 2031, and the radius of the base circle is the perpendicular distance from the rotation axis to the slide cylinder 202. During the rotation of the rocker arm 2031, the pin 2021 is always located in the axial direction of the slide cylinder 202's movement. When the rocker arm 2031 rotates to any angle, the pressure direction of the slot 20311 on the pin 2021 is exactly the normal direction of the slot 20311 curve, which is also the axial direction of the slide cylinder 202's movement. Therefore, setting the trajectory of the slot 20311 curve as an involute ensures that the pressure direction of the slot 20311 on the pin 2021 always points in the axial direction, with no radial component. The advantage of no radial component is that it avoids the slide cylinder 202 pressing the seal on the cylinder 201 on one side, thus preventing accelerated wear of the seal on one side. This improves system reliability, significantly extends seal replacement time, simplifies system structure (eliminating the need for mechanisms to counteract radial forces), and, more importantly, enhances system transmission efficiency and reduces wasted work.

[0073] Furthermore, the rocker arm 2031 in the above embodiment can be divided into two parts: a straight part and a curved part. The end of the straight part away from the curved part is the first end of the rocker arm 2031, which is also the pivot of the rocker arm 2031. The end of the curved part away from the straight part is the second end of the rocker arm 2031, which is also the connection between the rocker arm 2031 and the drive member 2032. The curved part is also set to an involute shape.

[0074] Furthermore, to ensure the structural strength and stability of the drive assembly 203, the drive assembly 203 may include two rocker arms 2031 as described in the above embodiments. Please refer to... Figures 8-10 After the two rocker arms 2031 are aligned vertically, they are respectively positioned above and below the slide cylinder 202. That is, the drive assembly 203 includes an upper rocker arm 2031 and a lower rocker arm 2031. The first ends of both the upper and lower rocker arms 2031 are rotatably mounted on a rotating shaft, and the second ends of the upper and lower rocker arms 2031 are connected via a transmission rod, which is connected to the drive component 2032. A connecting rod is also provided between the upper and lower rocker arms 2031. The upper end of the connecting rod connects to the middle section of the upper rocker arm 2031, and the lower end connects to the middle section of the lower rocker arm 2031. The connecting rod ensures the structural strength of the upper and lower rocker arms 2031 and prevents misalignment or displacement of the upper and lower rocker arms 2031, thus preventing the slide cylinder 202 from sliding unevenly.

[0075] In some embodiments, the first ends of the rocker arms 2031 of the first clamping part and the second clamping part are also connected by a connecting rod, such as Figure 5 As shown.

[0076] Based on the rocker arm 2031 structure of the above embodiment, the drive component 2032 can be configured as a manual mechanical drive structure. Please refer to... Figure 10 The driving component 2032 includes a quick-release clamp, the clamp head of which is drive-connected to the second end of the rocker arm 2031. Specifically, a slide rail and a slider 205 are provided on the cylinder body 201. The slide rail is located on the side of the cylinder body 201 and is parallel to the sliding axis. The slider 205 is slidably mounted on the slide rail. The second end of the rocker arm 2031 is movably connected to the slider 205 (sliding connection or floating connection). A vertical mounting plate is provided on the base 100, and the quick-release clamp is mounted on the mounting plate. The clamp head of the quick-release clamp is movably connected to the slider 205. Preferably, the clamp head of the quick-release clamp is a flat-head screw 20324 that is screwed onto the telescopic rod 20323. The flat-head screw 20324 is floatingly connected to the slider 205, and there is a certain gap between the flat-head screw 20324 and the slider 205 to compensate for errors caused by assembly and manufacturing. By rotating the flat-head screw 20324, the distance between the two mating cylinders 204 can be adjusted to accommodate different valve clamp thicknesses.

[0077] like Figure 10 As shown, a transmission rod 20312 is installed at the second end of the rocker arm 2031. A vertical through hole is provided in the slider 205, through which the transmission rod 20312 passes. The chuck of the quick-release clamp is connected to one side of the slider 205. When the quick-release clamp performs its locking action, the handle 20321 is manually pushed. The handle 20321, via the crank 20322, pushes the chuck away from the handle 20321 until the chuck reaches its maximum distance. At this point, the crank 20322 and the telescopic rod 20323 are on the same straight line. When the quick clamp enters the self-locking state, the self-locking state is achieved based on the dead-point self-locking principle of the crank-slider structure. That is, when the crank 20322 and the telescopic rod 20323 are in a straight line, they reach the dead point, thus forming an axial self-lock. When the quick clamp performs the unlocking action, the handle 20321 is manually pulled open. The handle 20321 applies a non-axial force (radial force) to the crank 20322, thereby releasing the self-locking state. Then, the handle 20321 pulls the chuck closer to the handle 20321 through the crank 20322.

[0078] In the above embodiments, the advantage of using a quick-release clamp for the drive component 2032 is that when the two slides 202 of the clamping mechanism 200 are engaged, the quick-release clamp enters a self-locking state, and its jaws can continuously transmit axial pressure. That is, the two slides 202 of the clamping mechanism 200 are pressing against each other, thereby ensuring the sealing of the continuous flow channel formed by the first clamping part 210 and the second clamping part 220. In addition, the quick-release clamp, in conjunction with the aforementioned rocker arm 2031 structure, reduces the force required to manually open and close the clamping mechanism 200, easing the difficulty of preparing for replacing the valve under test, thereby improving the efficiency of pulsation testing.

[0079] It should be understood that the quick clamp in the above embodiments can be a manual clamp, or a pneumatic or electric quick clamp. Alternatively, in some possible cases, the quick clamp can be replaced by an automated drive device such as a motor or cylinder. Based on the automated drive device, one-button opening and closing can be achieved, which reduces the difficulty of preparation work for replacing the valve to be tested, and also enhances the sealing of the flow channel after the clamping mechanism 200 is engaged, thereby ensuring the stability and accuracy of the pulsation test.

[0080] Similarly, the embodiments of the present invention do not limit the drive assembly 203 to include only the rocker arm 2031 structure described above. The specific structure of the drive assembly 203 can be flexibly adjusted according to the actual situation. For example, in some possible cases, the drive assembly 203 can also be directly driven by a motor. Specifically, synchronous motors are respectively provided on the front and rear sides of the cylinder 201. The two synchronous motors are respectively connected to the outer end of the slide cylinder 202 through a telescopic rod. The two synchronous motors can rotate synchronously at the same speed to drive the telescopic rod to push and pull the slide cylinder 202 at the same extension and retraction speed.

[0081] The above embodiments have described in detail the clamping mechanism 200 in the pulsation test stand of the present invention. Based on the clamping mechanism 200, water can be quickly stopped and the valve to be tested can be disassembled and assembled, shortening the preparation time for replacing the valve to be tested and thus improving the efficiency of pulsation testing.

[0082] In practical applications, when the type of valve to be replaced is different from the type of valve that has already been tested, the flow direction of the pulsation testing station may change. Specifically, when the first clamping part is connected to a water pump, the first clamping part simulates the ventricles (left ventricle / right ventricle). Based on this, if the valve to be tested is an aortic valve or a pulmonary valve, the blood flow simulated by the testing station is counterclockwise; if the valve to be tested is a mitral valve or a tricuspid valve, the blood flow simulated by the testing station is clockwise. For the above scenario, in addition to replacing the valve to be tested, the test preparation work also requires adjusting the structure of the flow channel mechanism 300 so that the human organs simulated by the flow channel mechanism 300 and the clamping mechanism 200 correspond to the type of valve to be tested, to ensure that the flow direction matches the valve to be tested. However, the above-mentioned reversal work will also lead to a decrease in testing efficiency.

[0083] To solve the above-mentioned technical problems, the flow channel mechanism 300 of this embodiment of the invention adopts a structure design that allows for quick reversal. Please refer to... Figures 2-3 The flow channel mechanism 300 includes a reversing module 310 and a chamber module 320. The chamber module 320 includes a first chamber portion 321 and a second chamber portion 322 that are connected. The first clamping portion 210, the reversing module 310, the first chamber portion 321, the second chamber portion 322 and the second clamping portion 220 are sequentially connected to form a circulating flow channel. The reversing module 310 is used to switch the flow direction of the fluid in the circulating flow channel.

[0084] Based on the above structure, the pulsation testing station can perform pulsation testing on all valves of the left heart (systemic circulation) and right heart (pulmonary circulation). Furthermore, when changing to a different type of valve for testing, it is not necessary to disassemble and reassemble the entire flow channel mechanism 300. Instead, the flow direction of the fluid in the circulation channel is directly switched through the reversing structure, which can significantly shorten the preparation work for changing valves and improve testing efficiency. The specific flow direction controlled by the reversing structure during each valve test is described below. It should be noted that, unless otherwise explained, in this embodiment of the invention, the first clamping part is connected to a water pump by default, i.e., the first clamping part is used to simulate the ventricle. In actual use, the tester can select to connect either the first or second clamping part to the water pump according to the testing needs. When the second clamping part is connected to the water pump, the flow direction of the circulation channel is adjusted accordingly, which will not be elaborated further.

[0085] In this invention, when performing mitral valve testing on the pulsation testing station, please refer to... Figure 12 The valve to be tested is the mitral valve. The second clamping part 220 simulates the left atrium, and the first clamping part 210 simulates the left ventricle. The valve to be tested allows fluid to flow unidirectionally from the second clamping part 220 into the first clamping part 210 (i.e., simulates blood flowing from the left atrium to the left ventricle). The switching module 310 simulates the aortic valve. The switching module 310 allows fluid to flow unidirectionally from the first clamping part 210 into the first chamber part 321 (i.e., simulates blood flowing from the left ventricle to the aorta).

[0086] When performing aortic valve testing on the pulsation testing station, please refer to... Figure 13 The valve under test is the aortic valve. The first clamping part 210 simulates the left ventricle. The valve under test allows fluid to flow unidirectionally from the first clamping part 210 into the second clamping part 220 (i.e., simulates blood flowing from the left ventricle to the aorta). The first chamber part 321 simulates the left atrium. The switching module 310 simulates the mitral valve. The switching module 310 allows fluid to flow unidirectionally from the first chamber part 321 into the first clamping part 210 (i.e., simulates blood flowing from the left atrium to the left ventricle).

[0087] When performing tricuspid valve testing on the pulsation test stand, please refer to... Figure 12 The valve to be tested is the tricuspid valve. The second clamping part 220 simulates the right atrium, and the first clamping part 210 simulates the right ventricle. The valve to be tested allows fluid to flow unidirectionally from the second clamping part 220 into the first clamping part 210 (i.e., simulates blood flowing from the right atrium to the right ventricle). The switching module 310 simulates the pulmonary valve. The switching module 310 allows fluid to flow unidirectionally from the first clamping part 210 into the first chamber part 321 (i.e., simulates blood flowing from the right ventricle to the pulmonary artery).

[0088] When performing pulmonary valve testing on the pulsation testing station, please refer to... Figure 13 The valve to be tested is the pulmonary valve. The first clamping part 210 simulates the right ventricle. The valve to be tested allows fluid to flow unidirectionally from the first clamping part 210 into the second clamping part 220 (i.e., simulates blood flowing from the right ventricle to the pulmonary artery). The first chamber part 321 simulates the right atrium. The switching module 310 simulates the tricuspid valve. The switching module 310 allows fluid to flow unidirectionally from the first chamber part 321 into the first clamping part 210 (i.e., simulates blood flowing from the right atrium to the right ventricle).

[0089] The embodiments of the present invention do not limit the specific structure of the reversing module 310. That is to say, any structure that can have unidirectional flow and can change the flow direction can be used as the reversing module 310 of the pulsation test bench. The specific structure of the reversing module 310 can be designed according to the structure of other components of the pulsation test bench.

[0090] In some embodiments, the reversing module 310 can be implemented by a single flow channel in conjunction with the valve body for switching. Please refer to... Figure 14 The reversing module 310 includes a reversing valve 311 and a connecting channel 312. The reversing valve 311 is slidably mounted on one end of the connecting channel 312. The reversing valve 311 includes two one-way valves 3111 in opposite directions. The reversing valve 311 can slide to switch the one-way valves 3111 located inside the connecting channel 312. The connecting channel 312 is used to connect the upper cavity of the isolation valve 340 and the cylinder 201 of the first clamping part 210.

[0091] In one specific implementation, please refer to Figures 15-16 The connecting channel 312 is configured as a flange pipe, and the reversing valve 311 is located at one end of the connecting channel 312 near the isolation valve 340. The reversing valve 311 includes a handle and a slide plate. The slide plate is laterally slidable, and two butterfly valves with opposite directions are installed side by side laterally on the slide plate. Based on the above structure, when performing a reversing operation on the flow channel mechanism 300, the direction of the one-way valve 3111 in the connecting channel 312 can be switched by directly pushing or pulling the handle of the reversing valve 311.

[0092] In other embodiments, the reversing module 310 can also be implemented using two unidirectional flow channels in conjunction with a three-way valve. Specifically, please refer to... Figure 17 The reversing module 310 includes a first three-way valve, a second three-way valve, a first pipe, and a second pipe. The first end of the first three-way valve is connected to the first chamber 321, the second end of the first three-way valve is connected to the first end of the first pipe, and the third end of the first three-way valve is connected to the first end of the second pipe. The first end of the second three-way valve is connected to the first clamping part 210, the second end of the second three-way valve is connected to the second end of the first pipe, and the third end of the second three-way valve is connected to the second end of the second pipe. One-way valves 3111 with opposite directions are respectively provided in the first pipe and the second pipe. Based on the above structure, two unidirectional flow channels are set in the circulation loop through two three-way valves. The three-way valves ensure that only one unidirectional flow channel is connected to the circulation loop. By switching the conduction port of the three-way valve, the connected unidirectional flow channel can be switched, thereby changing the flow direction of the channel.

[0093] In the above embodiments, the specific type of the one-way valve 3111 is not limited. The one-way valve 3111 can be a butterfly valve, a ball valve, or a diaphragm valve, etc. In some cases, in order to enhance the realism of the simulation, the one-way valve 3111 can also be configured as an artificial valve, including an artificial mitral valve, an artificial aortic valve, an artificial tricuspid valve, and an artificial pulmonary valve.

[0094] In this embodiment of the invention, the first chamber portion 321 and the second chamber portion 322 need to be configured in conjunction to meet the pulsation test requirements of different types of valves. Specifically, the first chamber portion 321 includes a first water tank 3211, and the second chamber portion 322 includes a second water tank 3221. The first water tank 3211 is installed on the top of the first clamping portion 210, and the cylinder 201 of the first clamping portion 210 is connected to the first water tank 3211 through its flow port 2011. The second water tank 3221 is installed on the top of the second clamping portion 220, and the cylinder 201 of the second clamping portion is connected to the second water tank 3221 through its flow port 2011. The first water tank 3211 and the second water tank 3221 are connected by a connecting pipe 330, and a pressure regulating device 331 is provided on the connecting pipe 330. The pressure regulating device 331 is used to regulate the fluid pressure on both sides of the pipe.

[0095] The purpose of setting up the pressure regulating device 331 in this embodiment is that there are differences in blood pressure within the human body; the blood pressure at the heart is greater than the blood pressure outside the heart. Therefore, the pressure regulating device 331 is set up to ensure that the fluid pressure of the pulsation testing station matches the actual blood pressure. It should be understood that this embodiment does not limit the specific selection of the pressure regulating device 331. For example, the pressure regulating device 331 can be a pressure boosting valve or a throttling valve.

[0096] In this embodiment of the invention, according to the flow direction of the circulation channel of the pulsation test bench, one of the first water tank 3211 and the second water tank 3221 serves as a water injection tank, and the other serves as a pressurized water tank. After the flow direction of the circulation channel changes, the functions of the first water tank 3211 and the second water tank 3221 are also interchanged. This embodiment can achieve the above-mentioned function interchange without disassembling the main body of the water tank. Specifically, the top of the first water tank 3211 and the top of the second water tank 3221 are both provided with water injection holes. The water injection holes are used to install a removable pressurized cover. The removable pressurized cover is provided with an air inlet. The air inlet is used to connect an external air pump. One of the first water tank 3211 and the second water tank 3221 is equipped with the above-mentioned removable pressurized cover and serves as a pressurized water tank. Its removable pressurized cover is connected to an air inlet device to realize the pressurization function. The other serves as a water injection tank, and the water injection tank does not need to be equipped with the above-mentioned removable pressurized cover.

[0097] To facilitate understanding, the specific flow direction of the circulation channel of the pulsation test bench during different artificial valve tests is described below. By default, the first clamping part 210 is connected to the water pump, so the first clamping part 210 is the starting position of the flow direction, and the simulated organ is the ventricle (the left ventricle is simulated in systemic circulation / the right ventricle is simulated in pulmonary circulation).

[0098] During the mitral valve test, a removable pressure cap is installed on the first water tank 3211, the water inlet of the second water tank 3221 is kept open, and the reversing module 310 controls the fluid to flow unidirectionally from the first clamping part 210 into the first chamber part 321. The flow direction of the circulation channel of the pulsation test station is as follows: first clamping part 210 (left ventricle) - reversing module 310 (aortic valve) - first chamber part 321 - connecting tube 330 - second chamber part 322 - second clamping part 220 (left atrium) - valve to be tested (mitral valve) - first clamping part 210 (left ventricle).

[0099] During aortic valve testing, a removable pressure cap is installed on the second water tank 3221, the water inlet of the first water tank 3211 is kept open, and the reversing module 310 controls the fluid to flow unidirectionally from the first chamber 321 into the first clamping part 210. The flow direction of the circulation channel of the pulsation test station is as follows: first clamping part 210 (left ventricle) - valve to be tested (aortic valve) - second clamping part 220 - second chamber 322 - connecting tube 330 - first chamber 321 (left atrium) - reversing module 310 (mitral valve) - first clamping part 210 (left ventricle).

[0100] During the tricuspid valve test, a removable pressure cap is installed on the first water tank 3211, the water inlet of the second water tank 3221 is kept open, and the reversing module 310 controls the fluid to flow unidirectionally from the first clamping part 210 into the first chamber part 321. The flow direction of the circulation channel of the pulsation test station is as follows: first clamping part 210 (right ventricle) - reversing module 310 (pulmonary valve) - first chamber part 321 - connecting tube 330 - second chamber part 322 - second clamping part 220 (right atrium) - valve to be tested (tricuspid valve) - first clamping part 210 (right ventricle).

[0101] During pulmonary valve testing, a removable pressure cap is installed on the second water tank 3221, the water inlet of the first water tank 3211 is kept open, and the reversing module 310 controls the fluid to flow unidirectionally from the first chamber 321 into the first clamping part 210. The flow direction of the circulation channel of the pulsation test station is as follows: first clamping part 210 (right ventricle) - valve to be tested (pulmonary valve) - second clamping part 220 - second chamber 322 - connecting tube 330 - first chamber 321 (right atrium) - reversing module 310 (tricuspid valve) - first clamping part 210 (right ventricle).

[0102] As can be seen from the above, the pulsation test bench of the present invention simplifies the reversing preparation work of the flow channel mechanism 300 when testing different types of valves. Only two actions are required: removing the removable pressure cap from one water tank and installing it in another, and changing the unidirectional flow direction of the reversing module 310. Furthermore, during the reversing preparation process, since no additional water tank disassembly is required, the fluid in the flow channel mechanism 300 is preserved. Combined with the clamping and water-stopping action of the clamping mechanism 200, the preparation work for valve replacement can be significantly shortened, thereby improving the efficiency of the pulsation test.

[0103] In this embodiment of the invention, one of the first clamping part 210 and the second clamping part 220 is connected to a water pump to simulate the diastolic and dilation of the ventricle, thereby driving the fluid to flow in a specified direction to complete the pulsation simulation test.

[0104] In one specific embodiment, the first clamping part 210 is connected to a water pump via an isolation valve 340. The isolation valve 340 includes an upper cavity and a lower cavity. A valve core is provided at the connection between the upper cavity and the lower cavity. The valve core is used to control the opening and closing between the upper cavity and the lower cavity, thereby facilitating drainage and venting. A first water tank 3211 is installed on the top of the isolation valve 340 and is connected to the upper cavity. The upper cavity is connected to the second chamber part 322 via a connecting pipe 330. An isolation channel 341 is provided on the outside of the isolation valve 340. One end of the isolation channel 341 is connected to the lower cavity, and the other end of the isolation channel 341 is connected to the water pump. An isolation membrane is provided inside the isolation channel 341. The isolation membrane is used to isolate the fluid in the water pump from the fluid in the pulsation test bench. The water pump fluid impacts the isolation membrane, thereby promoting the flow of fluid in the pulsation test bench. The isolation membrane can be configured as a hemispherical membrane. The cylinder body 201 of the first clamping part 210 is provided with two flow channels 2011, which are respectively connected to the upper cavity and the lower cavity of the isolation valve 340. Based on the above structure, the two cavities of the isolation valve 340 are separated from each other. Its upper cavity is connected to the first water tank 3211, and its lower cavity is connected to the cylinder body 201 of the first clamping part 210. The isolation valve 340 can increase the flow space of the first water tank 3211 and the first clamping part 210.

[0105] For further details, please refer to Figure 18 The second chamber 322 also includes a connecting block 3222, which is mounted on top of the second clamping part 220. A second water tank 3221 is mounted on top of the connecting block 3222. The connecting block 3222 has two independent fluid channels, through which the second water tank 3221 communicates with the connecting pipe 330 and the second clamping part 220, respectively. The purpose of the connecting block 3222 is to adjust the height of the second water tank 3221 to match the height of the first water tank 3211, keeping the connecting pipe 330 horizontal. This helps adjust the fluid pressure in the circulation loop to achieve a good simulation effect and ensure the accuracy and stability of the pulsation test.

[0106] The above embodiments have described the opening and closing water-stopping function of the clamping mechanism 200 and the rapid reversing function of the flow channel mechanism 300 in the pulsation test stand of the present invention. Based on the clamping mechanism 200 and the flow channel mechanism 300, the difficulty of preparing for the replacement and installation of the valve to be tested in the pulsation test stand is reduced, thereby improving the efficiency of valve testing. In addition, the pulsation test stand of the present invention is also provided with other components to improve the accuracy of valve pulsation testing.

[0107] Please refer to Figures 8-9In this embodiment of the invention, the clamping mechanism 200 further includes a mating cylinder 204, which is installed on the outer end of the slide cylinder 202 and is used to mount the valve to be tested. The two mating cylinders 204 in the clamping mechanism 200 respectively clamp the two ends of the valve to be tested, and the two mating cylinders 204 can be connected to form a continuous channel.

[0108] This embodiment does not limit the connection method between the mating cylinder 204 and the sliding cylinder 202. For example, the mating cylinder 204 can be fixedly installed on the sliding cylinder 202. In this case, to install the valve to be tested, the valve to be tested needs to be installed on the mating cylinder 204 of one clamping mechanism 200, and then the mating cylinders 204 of the two clamping mechanisms 200 are connected. Alternatively, the mating cylinder 204 can also be detachably installed on the sliding cylinder 202. In this case, to install the valve to be tested, the two mating cylinders 204 are used to clamp the valve to be tested to form an assembly, and then the sliding cylinders 202 of the two clamping mechanisms 200 clamp the assembly from both ends to complete the connection.

[0109] The purpose of setting up the matching cylinder 204 in this embodiment is, on the one hand, to facilitate matching with the valve to be tested and reduce the difficulty of installation and testing, and on the other hand, to facilitate the additional setting of other observation devices by setting up the matching cylinder 204 separately.

[0110] In some specific embodiments, the coupling cylinder 204 can be made of a transparent material, such as transparent acrylic material, so that the fluid conditions on both sides of the film under test can be directly observed by the transparent coupling cylinder 204, thereby facilitating the acquisition of accurate test data.

[0111] In some other specific embodiments, the confluence cylinder 204 is also equipped with a pressure sensor and / or a flow meter. The pressure sensor is used to detect the fluid pressure parameter inside the confluence cylinder 204, while the flow meter is used to detect the fluid velocity parameter inside the confluence cylinder 204. Similarly, other detection devices may also be provided on the confluence cylinder 204, which will not be described in detail in this embodiment.

[0112] In some embodiments, a vision device, such as an industrial vision camera, can also be configured to acquire test image data. Please refer to... Figure 19The clamping mechanism 200 has an observation window on one side of its cylinder 201, which is coaxial with the coupling cylinder 204. A camera 400 is also mounted on the base 100 to capture images of both sides of the valve under test. Specifically, two cameras 400 are mounted on the base 100, respectively located on either side of the first clamping part 210 and the second clamping part 220. A miniature slide rail assembly is mounted on the other side of the mounting plate of the quick-clamping device on the base 100. The camera 400 is mounted on the miniature slide rail assembly, which is used to adjust the axial distance between the camera 400 and the valve under test to improve image quality. It is understood that in some possible cases, the cylinder 201 of the clamping mechanism 200 can also be made of transparent acrylic material, eliminating the need for an additional observation window in acrylic cylinder 201.

[0113] In a further embodiment, please refer to Figure 19 The cylinder 201 of the clamping mechanism 200 is also provided with a vertical light source 410 on the side near the camera 400. A light source buckle plate is provided on the side of the cylinder 201. The light source buckle plate is used to fix the vertical light source 410 to ensure that the vertical light source 410 is aligned with the coupling cylinder 204. The camera 400 is aligned with the hollow part of the vertical light source 410 to capture image data of the valve to be tested.

[0114] In this embodiment of the invention, the pulsation test station is also equipped with a constant temperature device, and the heating device is used to heat the fluid in the circulation channel, so that the fluid parameters are closer to the real blood parameters.

[0115] In some possible cases, a thermostat is mounted on the cylinder 201 of the clamping mechanism 200 to enhance the heating effect; specifically, please refer to... Figure 20 The clamping mechanism 200 has a mounting groove at the bottom of its cylinder 201, within which a heater 500 is installed. The advantage of placing the heater 500 at the bottom of the cylinder 201 is that, compared to other methods that directly heat the fluid with heating rods, this solution effectively avoids contaminating the fluid medium in the test bench's circulation channel with the heater 500, thus preventing contamination of the valve product (as heating rod seals release substances when heated). Furthermore, because it does not come into contact with the medium, the heater 500 has a longer lifespan. Additionally, the mounting groove can also be equipped with a temperature detection device to obtain the fluid temperature for precise temperature control.

[0116] The above embodiments have described the pulsation test station of the present invention in detail. Using the pulsation test station of the present invention has the following beneficial effects:

[0117] 1. The pulsation test bench is equipped with a clamping mechanism that acts as a water stop valve. The clamping mechanism can stop the water flow when it is opened, preventing the fluid in the flow channel mechanism from flowing out. This shortens the steps of disassembling and replacing the valve under test, improves the replacement efficiency, and thus improves the testing efficiency.

[0118] 2. The pulsation test bench is equipped with a flow channel mechanism that can quickly change direction. The flow direction of the fluid in the flow channel can be quickly changed through the reversing module in the flow channel mechanism. Moreover, the flow channel mechanism does not need to be disassembled and reassembled. Only a detachable pressure cover needs to be removed and installed to complete the function of the water tank. This can greatly reduce the difficulty of the flow channel mechanism reversing work and thus improve the testing efficiency.

[0119] 3. The pulsation test stand is equipped with a vision device in conjunction with other sensors, which can accurately acquire images of the valve under test and the fluid state within the flow channel, thus helping to improve the accuracy of the pulsation test.

[0120] It should be noted that the order of the above embodiments of the present invention is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0121] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A pulsation testing platform, characterized in that, It includes a base, a flow channel mechanism mounted on the base, and a clamping mechanism. The flow channel mechanism and the clamping mechanism are connected to form a circulating flow channel. The clamping mechanism is used to clamp the valve to be tested. The clamping mechanism includes two clamping parts arranged opposite to each other. The clamping part includes a cylinder, a slide cylinder, and a drive assembly. The cylinder has at least one flow channel, the slide cylinder is slidably connected to the cylinder, and the drive assembly is used to drive the slide cylinder to slide. When the slide cylinder moves toward the cylinder body, it closes the flow channel opening of the cylinder body. When the slide cylinder moves away from the cylinder body to the point where the two clamping parts are joined to form a sealed flow channel, the inner cavity of the slide cylinder is connected to the flow channel opening.

2. The pulsation test stand according to claim 1, characterized in that, The end of the slide tube located inside the inner cavity of the cylinder is the inner end, and the end of the slide tube located outside the cylinder is the outer end; The inner end moves between a first position and a second position. The first position is the position where the slide moves toward the cylinder to close the flow channel opening, and the second position is the position where the two clamping parts are joined to form a sealed flow channel.

3. The pulsation test stand according to claim 1, characterized in that, The slide tube has a water inlet on its side wall that corresponds to the flow channel opening of the cylinder. When the slide tube moves toward the cylinder, the outer side wall of the slide tube closes the flow channel opening of the cylinder. When the slide tube moves away from the cylinder until the two clamping parts are joined to form a closed flow channel, the water inlet connects with the flow channel opening of the cylinder.

4. The pulsation test stand according to claim 1, characterized in that, The drive assembly includes a rocker arm and a drive component. The first end of the rocker arm is rotatably mounted on the base, and the second end of the rocker arm is connected to the drive component. The rocker arm is provided with a slot. The outer end of the slide cylinder is provided with a pin, which is located in the slot. After the driving member pushes and pulls the second end of the rocker arm, the slot can apply a driving force to the pin to drive the slide cylinder to slide axially.

5. The pulsation test stand according to claim 4, characterized in that, The trajectory of the slot is an involute, and the center of the base circle of the involute is the rotation axis of the rocker arm. After the driving member pushes and pulls the second end of the rocker arm, the slot can apply a driving force along the axial direction of the slide cylinder to the pin, so as to drive the slide cylinder to slide axially.

6. The pulsation test stand according to claim 4, characterized in that, The drive assembly includes two rocker arms, which are aligned vertically and positioned above and below the slide cylinder, respectively.

7. The pulsation test stand according to claim 5, characterized in that, The drive component includes a quick clamp, the clamp head of which is drively connected to the second end of the rocker arm.

8. The pulsation test stand according to claim 5, characterized in that, The driving component includes a motor or a cylinder.

9. The pulsation test stand according to claim 1, characterized in that, The clamping mechanism further includes a coupling cylinder, which is installed on the outer end of the slide cylinder. The coupling cylinder is used to install the valve to be tested. The coupling cylinder is equipped with a pressure sensor and / or a flow meter. The pressure sensor is used to detect the fluid pressure inside the coupling cylinder, and the flow meter is used to detect the fluid velocity inside the coupling cylinder.

10. The pulsation test stand according to claim 1, characterized in that, An observation window is provided on one side of the cylinder body. The observation window is coaxial with the coupling cylinder. A camera is also provided on the base, and the camera is aimed at the observation window.

11. The pulsation test stand according to claim 1, characterized in that, The bottom of the cylinder is provided with a mounting groove, and a heater is provided in the mounting groove.

12. The pulsation test stand according to any one of claims 1-11, characterized in that, The flow channel mechanism includes a reversing module and a chamber module. The chamber module includes a first chamber and a second chamber that are connected. The reversing module is used to switch the flow direction of the fluid in the circulating flow channel formed by the flow channel mechanism and the clamping mechanism.

13. The pulsation test stand according to claim 12, characterized in that, The reversing module includes a reversing valve and a connecting channel. The reversing valve is slidably mounted on one end of the connecting channel. The reversing valve includes two one-way valves in opposite directions. The reversing valve can slide to switch the one-way valve located inside the connecting channel.

14. The pulsation test stand according to claim 12, characterized in that, The reversing module includes a first three-way valve, a second three-way valve, a first pipe, and a second pipe. The first end of the first three-way valve is connected to the first chamber, the second end of the first three-way valve is connected to the first end of the first pipe, and the third end of the first three-way valve is connected to the first end of the second pipe. The first end of the second three-way valve is connected to the first clamping part, the second end of the second three-way valve is connected to the second end of the first pipeline, and the third end of the second three-way valve is connected to the second end of the second pipeline. The first pipe and the second pipe are each equipped with a one-way valve with opposite directions.

15. The pulsation test stand according to claim 13, characterized in that, The first chamber includes a first water tank, and the second chamber includes a second water tank. The first water tank and the second water tank are connected by a connecting pipe. A pressure regulating device is provided on the connecting pipe to regulate the fluid pressure on both sides.

16. The pulsation test stand according to claim 15, characterized in that, Both the top of the first water tank and the top of the second water tank are provided with water injection holes. The water injection holes are used to install a removable pressure cap. The removable pressure cap is provided with an air inlet. One of the first water tank and the second water tank is equipped with the removable pressure cap.

Images