Impulse pump and muscle simulation device

Abstract

The application provides a pulse pump and a muscle simulation device, and relates to the technical field of pumps. The pulse pump provided by the application comprises an inlet channel, an outlet channel, a three-way channel, a piston pump, a first one-way valve, a second one-way valve and a liquid storage space; the three-way channel is connected with the inlet channel, the outlet channel and the piston pump respectively; the liquid storage space is arranged at the inlet channel; the first one-way valve is arranged at the inlet channel, and the first one-way valve is located between the liquid storage space and the three-way channel; the first one-way valve is configured to allow fluid flowing out of the liquid storage space to pass through and prevent fluid flowing back to the liquid storage space; the second one-way valve is arranged at the outlet channel; and the second one-way valve is configured to allow fluid flowing out of the three-way channel to pass through and prevent fluid flowing back to the three-way channel.

Description

Technical Field

[0001] This specification relates to the technical field of pumps, and in particular to a pulse pump and muscle simulation device. Background Technology

[0002] Chronic venous disease commonly occurs in the lower extremities and is caused by damage to venous valves, leading to venous reflux and resulting in venous hypertension. The human body has three types of blood vessels: veins, arteries, and capillaries. Only veins have valves; veins are responsible for carrying blood from all parts of the body back to the heart, while valves prevent backflow. Since the 1980s, scientists have proposed creating artificial venous valves to replace diseased venous valves. To test the key performance parameters of artificial venous valves, a device is needed that can simulate the working environment of an artificial venous valve inside a vein. Utility Model Content

[0003] This specification provides a pulse pump, including: an inlet channel, an outlet channel, a three-way channel, a piston pump, a first check valve, a second check valve, and a liquid storage space; the three-way channel is connected to the inlet channel, the outlet channel, and the piston pump respectively; the liquid storage space is located at the inlet channel; the first check valve is located at the inlet channel and is situated between the liquid storage space and the three-way channel; the first check valve is configured to allow fluid flowing out of the liquid storage space to pass through and to prevent fluid from flowing back into the liquid storage space; the second check valve is located at the outlet channel; the second check valve is configured to allow fluid flowing out of the three-way channel to pass through and to prevent fluid from flowing back into the three-way channel.

[0004] In some embodiments, the piston pump includes: a piston space, a piston disposed within the piston space, and a drive mechanism for driving the piston to move; the piston moves within the piston space to change the volume of the piston space; the piston space is connected to the three-way channel.

[0005] In some embodiments, the piston pump further includes an overflow valve connected to the piston space.

[0006] In some embodiments, the liquid storage space is connected to the atmosphere; or, the liquid storage space is connected to the atmosphere through a liquid storage space throttle valve; or, the liquid storage space is enclosed.

[0007] In some embodiments, the pulse pump further includes an inlet throttle valve, which is disposed in the inlet channel and located upstream of the liquid storage space, for controlling the flow rate of fluid entering the liquid storage space.

[0008] In some embodiments, the pulse pump further includes: an inlet pipe for providing the inlet channel, an outlet pipe for providing the outlet channel, a tee fitting for providing the tee channel, and a storage tank for providing the storage space.

[0009] In some embodiments, the pulse pump further includes an integrated valve block, wherein the inlet channel, the outlet channel, the three-way channel, and the liquid storage space are all located inside the integrated valve block.

[0010] This specification provides a muscle simulation device, comprising: a housing and a simulated blood vessel penetrating the housing, wherein a simulated medium accommodating space for accommodating a simulated medium is formed between the housing and the simulated blood vessel; the muscle simulation device further comprises a pulse pump as described in any one of the above, wherein the inlet channel and the outlet channel of the pulse pump are respectively connected to the simulated medium accommodating space.

[0011] In some embodiments, the muscle simulation device further includes one or more air bladders connected to the simulation medium accommodating space, the air bladders having at least a portion of a buffer gas inside.

[0012] In some embodiments, the muscle simulation device further includes a pressure sensor for acquiring pressure information within the space containing the simulation medium. Attached Figure Description

[0013] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. The same numbers in the drawings denote the same structures or steps.

[0014] Figure 1 This is a schematic diagram of a pulse pump according to some embodiments of this specification.

[0015] Figure 2 This is a top view schematic diagram of a pulse pump according to some embodiments of this specification.

[0016] Figure 3 This is a cross-sectional schematic diagram of the piston pump of a pulse pump according to some embodiments of this specification.

[0017] Figure 4 This is a schematic diagram of a muscle simulation device according to some embodiments of this specification.

[0018] Figure 5 This is a schematic diagram of the housing and air bladder of a muscle simulation device according to some embodiments of this specification.

[0019] Figure 6This is a cross-sectional schematic diagram of the housing and simulated blood vessels of a muscle simulation device according to some embodiments of this specification.

[0020] Figure 7 , Figure 8 This is a schematic diagram illustrating the compression of blood vessels by a muscle simulation device according to some embodiments of this specification.

[0021] Figure 9 This is a schematic diagram of the vascular filling state of a muscle simulation device according to some embodiments of this specification.

[0022] Labels in the diagram: 1 Piston pump; 11 Piston space; 12 Piston; 13 Drive mechanism; 131 Drive mechanism housing; 132 Stator; 133 Mover; 134 Lead screw assembly; 135 Connector; 136 Connector; 137 Plate structure; 101 Piston pump pipeline; 102 Piston housing; 21 First check valve; 22 Second check valve; 3 Liquid storage space throttle valve; 4 Inlet throttle valve; 5 Inlet pipeline; 6 Outlet pipeline; 7 T-fitting; 8 Liquid storage tank; 91 Housing; 92 Simulated blood vessel; 93 Airbag; 94 Pressure sensor. Detailed Implementation

[0023] To more clearly illustrate the technical solutions of the embodiments in this specification, the embodiments will be described in detail below with reference to the accompanying drawings. Obviously, the content described below are some examples or embodiments of this specification. For those skilled in the art, without creative effort, the technical solutions or means disclosed in this specification can be applied to other scenarios based on this technical content.

[0024] It should be understood that the terms "system," "device," "equipment," "part" and / or "component," "unit" and / or "module" used in this specification are a method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other words can achieve the same purpose, they may be replaced by other expressions.

[0025] Unless otherwise specified, the technical terms used to describe components, elements, etc. in this specification are not singular but may include plural. Generally speaking, terms such as "comprising" or "including" only indicate that explicitly identified steps, elements, or components are included, and these steps, elements, and components do not constitute an exclusive list, as the described method or apparatus may also include other steps or components.

[0026] In the description of this specification, it should be understood that the directional descriptions, such as up, down, front, back, left, and right, indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. These descriptions are for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In the description of this specification, unless otherwise expressly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly. Those skilled in the art can reasonably determine the specific meaning of the above terms in this specification in conjunction with the specific content of the technical solution.

[0027] Chronic venous disease (CVD) commonly occurs in the lower extremities. It is caused by damage to the venous valves, leading to venous reflux and resulting in venous hypertension. Related data shows that the current prevalence of lower extremity venous disease in my country is 8.89%, which translates to nearly 100 million patients.

[0028] The human body has three types of blood vessels: veins, arteries, and capillaries. Only veins have valves. Veins are responsible for carrying blood from all parts of the body back to the heart, and the valves prevent backflow. In some applications, the valves open as blood flows towards the heart, allowing blood to flow in; once the blood has flowed out, the valves close to prevent backflow. Venous valves are "one-way valves" that ensure the return of blood from veins to the heart. Damage to venous valves can cause venous blood to reflux, leading to venous hypertension and potentially chronic venous diseases.

[0029] Since the 1980s, scientists have proposed manufacturing artificial venous valves to replace diseased venous valves. To test the key performance parameters of artificial venous valves, a device is needed that can simulate the working environment of an artificial venous valve inside a vein.

[0030] Based on this, one or more embodiments of this specification provide a pulse pump that can output a fluid medium with a specific pulse pressure, which can be used to simulate the hemodynamic characteristics of deep veins in the human lower limbs and is suitable for hemodynamic testing of artificial venous valves or other related products.

[0031] Figure 1 This is a schematic diagram of a pulse pump according to some embodiments of this specification. Figure 2 This is a top view schematic diagram of a pulse pump according to some embodiments shown in this specification. Figure 3 This is a cross-sectional schematic view of the piston pump portion of a pulse pump according to some embodiments of this specification. See also Figures 1 to 3As shown, in one or more embodiments of this specification, the pulse pump may include: an inlet channel, an outlet channel, a three-way channel, a piston pump 1, a first one-way valve 21, a second one-way valve 22, and a reservoir. In some embodiments, the inlet channel is used to obtain a fluid medium from an external source, such as a fluid source, or to recover a fluid medium from an associated device. In some embodiments, the outlet channel is used to output a fluid medium with a specific pulse pressure, which can be used to simulate the hemodynamic characteristics of deep veins in the human lower limb, such as simulating the pressure supplied to the vein due to the periodic contraction of muscles (e.g., the gastrocnemius muscle).

[0032] In some embodiments, when the inlet channel acquires or recycles fluid media from the outside, it can provide a certain negative pressure to the external device, which can simulate muscle relaxation. In some embodiments, when the inlet channel acquires or recycles fluid media from the outside, it can provide a greater negative pressure to the external device, which can cause the simulated blood vessels to expand, compensating for insufficient expansion of the simulated blood vessels in the external device.

[0033] It should be noted that inlet channels, outlet channels, and tee channels refer to spaces through which fluid can pass, not to physical pipes or tanks. Inlet channels, outlet channels, and tee channels can be provided by independent pipes or by holes or tanks created inside various physical structures (such as metal blocks, concrete blocks, underground spaces, etc.). Similarly, liquid storage space refers to spaces for the storage or temporary storage of fluid, not to physical liquid storage equipment. Liquid storage space can be provided by independent containers or by spaces created inside various physical structures.

[0034] In some embodiments, see Figure 1 , Figure 2 As shown, the pulse pump may include: an inlet pipe 5, an outlet pipe 6, and a tee fitting 7. The inlet pipe 5 provides an inlet channel, the outlet pipe 6 provides an outlet channel, and the tee fitting 7 provides a tee channel. In some embodiments, the inlet pipe 5 and the outlet pipe 6 may be tubular structures. The inlet pipe 5 and the outlet pipe 6 may be rigid pipes or flexible pipes, such as rigid pipes like metal pipes, PP pipes, PVC pipes, and PE pipes, or flexible pipes like silicone pipes and rubber pipes. In some embodiments, the tee fitting 7 is used to achieve flow branching or convergence at pipe branch points.

[0035] In some embodiments, the tee passage is connected to the inlet passage, the outlet passage, and the piston pump 1, respectively. For example, one end of the inlet pipe 5 forms an inlet end, and the other end of the inlet pipe 5 is connected to one port of the tee fitting 7. One end of the outlet pipe 6 forms an outlet end, and the other end of the outlet pipe 6 is connected to the other port of the tee fitting 7. The piston pump 1 can be directly connected to the tee fitting 7, or connected to the tee fitting 7 via the piston pump pipe 101.

[0036] In some embodiments, see Figure 1 , Figure 2 As shown, the pulse pump may include a reservoir 8. The reservoir 8 provides a storage space for storing fluid media. In some applications, fluid media obtained from external sources or recovered from related equipment can be stored in the reservoir. In some applications, the piston pump 1 can obtain fluid media from the reservoir and output it to external equipment.

[0037] In some embodiments, the liquid storage space is located at the inlet channel. In some embodiments, the inlet channel may include two parts, such as a first inlet channel and a second inlet channel, with the liquid storage space located between the first inlet channel and the second inlet channel. For example, the inlet pipe 5 may include a first inlet pipe 51 and a second inlet pipe 52, with the liquid storage tank 8 located between the first inlet pipe 51 and the second inlet pipe 52. Specifically, one end of the first inlet pipe 51 forms an inlet end, and the other end is connected to the side of the liquid storage tank 8; one end of the second inlet pipe 52 is connected to the side of the liquid storage tank 8, and the other end of the second inlet pipe 52 is connected to the tee fitting 7.

[0038] In some embodiments, the first check valve 21 is located at the inlet channel, for example, in the middle of the inlet pipe 5. In some embodiments, the first check valve 21 is located between the liquid storage space and the tee channel, for example, between the liquid storage tank 8 and the tee fitting 7. Exemplarily, the first check valve 21 is located in the middle of the second inlet pipe 52. In some embodiments, the first check valve 21 is configured to allow fluid flowing out of the liquid storage space to pass through and to prevent fluid from flowing back into the liquid storage space.

[0039] In some embodiments, the second check valve 22 is located at the outlet channel, for example, in the middle of the outlet pipe 6. In some embodiments, the second check valve 22 is configured to allow fluid flowing out of the three-way channel to pass through and to prevent fluid from flowing back into the three-way channel.

[0040] In one or more embodiments of this specification, see Figure 3As shown, the piston pump 1 includes: a piston space 11, a piston 12 disposed within the piston space 11, and a drive mechanism 13 for driving the piston 12 to move. In some embodiments, the piston 12 moves within the piston space to change the volume of the piston space 11.

[0041] For example, the piston pump 1 may include a piston housing 102 that provides a piston space 11. The piston 12 is shaped to match the inner wall of the piston housing 102 and forms a movable seal with the piston housing 102. When the piston 12 reciprocates linearly within the piston housing 102, the volume of the piston space 11 is changed. See also... Figure 3 As shown, when piston 12 moves to the left, the volume of piston space 11 decreases and the fluid medium in piston space 11 is discharged; when piston 12 moves to the right, the volume of piston space 11 increases, forming a negative pressure, and the fluid medium is drawn into piston space 11.

[0042] In some embodiments, the piston space 11 is connected to a three-way passage, for example, the piston housing 102 is connected to the three-way fitting 7 through the piston pump line 101.

[0043] In some use cases, see Figure 3 As shown, when piston 12 moves to the left, piston pump 1 outputs fluid medium to the three-way channel through piston space 11. At this time, first check valve 21 is closed and second check valve 22 is open, and fluid medium is output from the outlet end of outlet channel. In some application scenarios, when piston 12 moves to the right, piston pump 1 draws in fluid medium from the three-way channel. At this time, first check valve 21 is open and second check valve 22 is closed, and fluid medium enters piston space 11 from reservoir space, or fluid medium enters piston space from inlet end of inlet channel via reservoir space.

[0044] In some applications, the piston 12 reciprocates, and the fluid medium is output from the outlet end of the outlet channel at regular intervals. At the same time, the fluid medium is input from the reservoir or the inlet end of the inlet channel at regular intervals, thereby outputting a fluid medium with periodic pulse pressure to simulate the pressure supplied to the vein due to the periodic contraction of muscles (such as the gastrocnemius muscle).

[0045] In some embodiments, see Figure 3As shown, the drive mechanism 13 is a linear motor used to drive the piston 12 to perform linear reciprocating motion. In some embodiments, the drive mechanism 13 may include: a drive mechanism housing 131, a stator 132 fixedly connected to the drive mechanism housing 131, a mover 133 disposed inside the drive mechanism housing 131, a lead screw member 134 connected to the mover 133, and one or more connecting members (e.g., connecting member 135 and connecting member 136) connecting the lead screw member 134 and the piston 12. The mover 133 is configured to rotate under the action of the stator 132, and also has axial (e.g., Figure 3 The drive mechanism housing 131 may include a lead screw engagement component that matches the lead screw component 134. The lead screw engagement component is used to convert the rotation of the lead screw component 134 into axial displacement, and the connecting component is used to transmit the axial displacement to the piston 12 to drive the piston 12 to perform linear reciprocating motion.

[0046] In some embodiments, see Figures 1 to 3 As shown, the drive mechanism 13 also includes one or more plate-like structures 137, which surround the outside of the connectors, such as the outside of connectors 135 and 136, for protecting the connectors. In some embodiments, the two ends of the plate-like structures 137 are fixedly connected to the drive mechanism housing 131 and the piston housing 102, respectively.

[0047] In some embodiments, the piston pump 1 further includes an overflow valve connected to the piston space 11. See also: Figure 3 As shown, the piston housing 102 (e.g., the upper surface of the piston housing 103) has one or more holes for connecting to an overflow valve. In some embodiments, when the piston 12 of the piston pump 1 moves to discharge the fluid medium inside the piston space 11, due to the presence of a large amount of fluid medium in the downstream pipeline or a slow response of the fluid medium, the fluid medium inside the piston space 11 may further enter the downstream pipeline (e.g., the piston pump pipeline 101, the tee pipeline, and / or the outlet pipeline and related equipment connected to the outlet pipeline), potentially generating significant pressure in the downstream pipeline. To avoid the impact of this pressure on hemodynamic simulation or to prevent damage to the equipment, an overflow valve can be installed to discharge the excess fluid medium from the piston space 11.

[0048] In some embodiments, the liquid storage space of the pulse pump can be connected to the atmosphere; for example, the liquid storage tank 8 is an open-type liquid storage tank. In some usage scenarios, when the piston 12 of the piston pump 1 moves towards... Figure 3 The right-side movement in the piston occurs because the open design of the liquid storage space results in the inlet channel being completely open, preventing the inlet channel from forming a negative pressure, and the fluid medium enters the piston space from the liquid storage space.

[0049] In other embodiments, the liquid storage space of the pulse pump can be enclosed, for example, the liquid storage tank 8 is a closed liquid storage tank. In some usage scenarios, when the piston 12 of the piston pump 1 moves towards... Figure 3 The movement on the right side of the piston occurs because the sealed design of the liquid storage space results in a completely closed inlet channel, creating a negative pressure. The fluid medium enters the piston space from the inlet end of the inlet channel through the liquid storage space (or the fluid medium enters the piston space from the liquid storage space while simultaneously replenishing the liquid storage space from the inlet end of the inlet channel). The amount of fluid medium entering from the inlet end of the inlet channel is equal to the amount of fluid medium drawn into the piston space.

[0050] In some other embodiments, the liquid storage space of the pulse pump can be connected to the atmosphere through a liquid storage space throttle valve 3, for example, the liquid storage tank 8 can be connected to the atmosphere through the liquid storage space throttle valve 3.

[0051] In some application scenarios, the liquid storage space throttle valve 3 can be in a completely closed state to ensure that the liquid storage space is sealed.

[0052] In other usage scenarios, the liquid storage space throttle valve 3 can be in a fully open state to allow the liquid storage space to be open.

[0053] In some other applications, the liquid storage space throttle valve 3 can be in an intermediate state, allowing the liquid storage space to be partially open, when the piston 12 of the piston pump 1 moves towards... Figure 3 As the fluid moves to the right, a small negative pressure is created in the inlet channel. Part of the fluid medium enters the piston space from the storage space, while another part enters the piston space from the inlet end of the inlet channel through the storage space (or all the fluid medium enters the piston space from the storage space, while the inlet end of the inlet channel simultaneously replenishes the storage space with some fluid medium). The amount of fluid medium drawn into the piston space is equal to the sum of the amount of fluid medium entering from the inlet end of the inlet channel and the amount of fluid medium removed from the storage space.

[0054] In one or more embodiments of this specification, the pulse pump further includes: an inlet throttle valve 4, which is disposed in the inlet channel and located upstream of the liquid storage space, for controlling the flow rate of the fluid entering the liquid storage space.

[0055] In some related embodiments, the pulse pump may include an integrated valve block, with an inlet channel, an outlet channel, a tee channel, and a liquid storage space all located inside the integrated valve block. For example, one or more pipes may be provided inside the integrated valve block, with the inner walls of these pipes forming the inlet channel, outlet channel, and tee channel. The integrated valve block may also have a accommodating space, which is the liquid storage space. In some embodiments, the piston pump 1, the first check valve 21, and the second check valve 22 may be arranged inside one or more pipes of the integrated valve block. In some embodiments, the liquid storage space throttle valve 3, the inlet throttle valve 4, etc., may also be arranged inside one or more pipes of the integrated valve block. In some embodiments, the integrated valve block may also include one or more plugs for closing one or both ends of one or more process pipes.

[0056] Figure 4 These are schematic diagrams of muscle simulation devices illustrated in some embodiments of this specification. Figure 5 This is a schematic diagram of the housing and air bladder of a muscle simulation device according to some embodiments of this specification. Figure 6 This is a cross-sectional schematic diagram of the housing and simulated blood vessels of a muscle simulation device according to some embodiments of this specification. See also Figures 4 to 6 As shown, in one or more embodiments of this specification, the muscle simulation device may include: a housing 91 and a simulated blood vessel 92 penetrating the housing 91, wherein a simulated medium accommodating space for accommodating a simulated medium is formed between the housing 91 and the simulated blood vessel 92.

[0057] In some embodiments, the simulated blood vessel 92 is disposed inside the housing 91, and the housing 91 has a simulated blood vessel inlet connector and a simulated blood vessel outlet connector connected to the simulated blood vessel 92. In other embodiments, the middle portion of the simulated blood vessel 92 is disposed inside the housing 91, and both ends of the simulated blood vessel protrude from the housing 91.

[0058] In some embodiments, the simulated medium accommodating space and the space inside the simulated blood vessel 92 are relatively independent and not interconnected. In some embodiments, the simulated medium may be the fluid medium described above. In some embodiments, the muscle simulation device further includes the pulse pump described above, wherein the inlet channel and outlet channel of the pulse pump are respectively connected to the simulated medium accommodating space for providing simulated medium to the simulated medium accommodating space.

[0059] In some use cases, the amount of simulated medium within the simulated medium container increases, and the simulated blood vessel 92 is compressed by the simulated medium to simulate the pressure supplied to the vein due to the contraction of muscles (such as the gastrocnemius muscle). In other use cases, the amount of simulated medium within the simulated medium container decreases, and the simulated blood vessel 92 is canceled by the compression of the simulated medium to simulate the release of pressure previously supplied to the vein due to the relaxation of muscles. In still other use cases, the amount of simulated medium within the simulated medium container decreases further, and the simulated blood vessel 92 expands due to the negative pressure created by the reduction of the simulated medium to simulate the expansion of the simulated blood vessel 92 due to the filling of its internal blood.

[0060] For example, see Figure 7 , Figure 8 As shown, piston pump 1 operates to supply simulated medium to the simulated medium container space through the outlet channel, thereby increasing the simulated medium inside the container space to simulate muscle contraction and increasing the pressure on simulated blood vessel 92 to simulate blood vessel compression. In some application scenarios, see [link to relevant documentation]. Figure 7 As shown, if the storage space is open or partially open, after the simulated medium enters the storage space, due to the increased pressure in the storage space, a portion of the simulated medium can flow back into the storage space through the inlet channel, thus slowly reducing the pressure in the storage space. In other application scenarios, see... Figure 8 As shown, if the reservoir is enclosed, after the simulated medium enters the reservoir, the positive pressure at the inlet channel will cause the simulated medium to remain within the reservoir, thus maintaining the pressure within the reservoir. These two application scenarios are suitable for simulating different muscle conditions.

[0061] For example, see Figure 9 As shown, the piston pump 1 operates to draw in the simulated medium, thereby drawing in the simulated medium from the simulated medium container space through the inlet channel, thereby reducing the simulated medium inside the simulated medium container space to simulate muscle relaxation and reduce the pressure on the simulated blood vessel 92 to simulate blood vessel filling.

[0062] In one or more embodiments of this specification, the muscle simulation device may further include: one or more airbags 93, which are connected to the simulation medium accommodating space, and the interior of the airbags 93 is at least partially provided with buffer gas. When the simulation medium enters the simulation medium accommodating space, the simulation medium may also further enter the interior of the airbags 93. At this time, the volume of the buffer gas decreases due to the pressure of the simulation medium, and the buffer gas is compressed, thereby forming a buffer to prevent water hammer effect and avoid the simulated blood vessel 92 from being impacted by a sudden large pressure. This makes the pressure on the simulated blood vessel 92 when it is squeezed more gentle and closer to the pressure conditions of muscle on blood vessels.

[0063] In some embodiments, the muscle simulation device may further include a pressure sensor 94, which is used to acquire pressure information within the simulated medium's accommodating space. In some applications, the muscle simulation device can adjust the operating state of the piston pump based on the pressure information, thereby generating different pressure conditions of muscles on blood vessels.

[0064] In some embodiments, the controller of the muscle simulation device can input different drive curves to the piston pump 1, including sine, sawtooth, etc., and can also input various spline curves. The input curve represents the relationship between time and the forward displacement of the motor. Users can simulate various gastrocnemius muscle compression conditions, such as walking, running, and jumping, by adjusting the motion curve of the piston pump 1, the opening size of the inlet throttle valve 4, the liquid level in the reservoir, and the opening, closing, or degree of the reservoir throttle valve.

[0065] The beneficial effects that the embodiments of this specification may bring include, but are not limited to: (1) the pulse pump can output a fluid medium with a specific pulse pressure, which can be used to simulate the hemodynamic characteristics of deep veins in the human lower limbs and is suitable for hemodynamic testing of artificial venous valves or other related products; (2) the piston pump, in conjunction with the first check valve and the second check valve, can realize the pulse output of the fluid medium; (3) the overflow valve can discharge excess fluid medium from the piston space, avoiding excessive pressure in the downstream pipeline; (4) the closed or open setting of the liquid storage space, or the adjustment through the liquid storage space throttle valve Its opening degree allows selection of whether to form negative pressure at the inlet channel, or to adjust the magnitude of the negative pressure at the inlet channel, thereby selecting whether to draw fluid medium from the inlet end of the inlet channel during this stroke of the piston pump according to the required working conditions; (5) the flow rate of fluid entering the storage space is controlled by the inlet throttle valve; (6) the muscle simulation device can simulate the compression of blood vessels by muscles and the expansion of blood vessels; (7) the air bladder of the muscle simulation device can buffer the pressure generated when the fluid medium enters the simulated medium storage space; (8) the pressure in the simulated medium storage space is monitored or adjusted by the pressure sensor. It should be noted that different embodiments may produce different beneficial effects. In different embodiments, the beneficial effects that may be produced can be any one or a combination of the above, or any other possible beneficial effects.

[0066] The basic concepts have been described above. It is obvious that the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification. Although not explicitly stated herein, various modifications, improvements, and corrections may be made to this specification by those skilled in the art. Such modifications, improvements, and corrections are taught in this specification and therefore remain within the spirit and scope of the exemplary embodiments described herein.

Claims

1. A pulse pump, characterized in that, include: Inlet channel, outlet channel, three-way channel, piston pump (1), first check valve (21), second check valve (22) and liquid storage space; The three-way passage is connected to the inlet passage, the outlet passage and the piston pump (1) respectively; The liquid storage space is located at the inlet channel; The first check valve (21) is located at the inlet channel and between the liquid storage space and the three-way channel; the first check valve (21) is configured to allow fluid flowing out of the liquid storage space to pass through and prevent fluid from flowing back into the liquid storage space; The second check valve (22) is located at the outlet channel; the second check valve (22) is configured to allow fluid flowing out of the three-way channel to pass through and to prevent fluid from flowing back into the three-way channel.

2. The pulse pump according to claim 1, characterized in that, The piston pump (1) includes: a piston space (11), a piston (12) disposed in the piston space (11), and a drive mechanism (13) for driving the piston (12) to move. The piston (12) moves within the piston space (11) to change the volume of the piston space (11); The piston space (11) is connected to the three-way channel.

3. The pulse pump according to claim 2, characterized in that, The piston pump (1) further includes an overflow valve connected to the piston space (11).

4. The pulse pump according to claim 1, characterized in that, The liquid storage space is connected to the atmosphere; Alternatively, the liquid storage space is connected to the atmosphere through a liquid storage space throttle valve (3); Alternatively, the liquid storage space may be enclosed.

5. The pulse pump according to claim 1, characterized in that, Also includes: An inlet throttle valve (4) is provided in the inlet channel and is located upstream of the liquid storage space. It is used to control the flow rate of the fluid entering the liquid storage space.

6. The pulse pump according to claim 1, characterized in that, Also includes: An inlet pipe (5) for providing the inlet channel, an outlet pipe (6) for providing the outlet channel, a tee fitting (7) for providing the tee channel, and a storage tank (8) for providing the storage space.

7. The pulse pump according to claim 1, characterized in that, Also includes: The integrated valve block has its inlet channel, outlet channel, three-way channel, and liquid storage space all located inside it.

8. A muscle simulation device, characterized in that, include: A housing (91) and a simulated blood vessel (92) penetrating the housing (91), wherein a simulated medium accommodating space for accommodating a simulated medium is formed between the housing (91) and the simulated blood vessel (92); The muscle simulation device further includes a pulse pump as described in any one of claims 1 to 7, wherein the inlet channel and the outlet channel of the pulse pump are respectively connected to the simulation medium accommodating space.

9. The muscle simulation device according to claim 8, characterized in that, Also includes: One or more airbags (93) are connected to the simulated medium containment space, and the interior of the airbags (93) is at least partially provided with buffer gas.

10. The muscle simulation device according to claim 8, characterized in that, Also includes: Pressure sensor (94) is used to acquire pressure information within the simulated medium accommodating space.

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