Precision flow regulator for simulating peripheral vascular resistance

Abstract

The present invention relates to a precision flow regulator for simulating peripheral vascular resistance, comprising: an integrated upper shell; a bottom shell divided into left and right parts; a stop block fixedly arranged inside the left part of the bottom shell and flush with the right end; a first arc-shaped groove arranged on the right side of the stop block along the front-rear direction; a left arc-shaped hole arranged on the front and rear side walls of the left part of the bottom shell and corresponding to the position of the first arc-shaped groove; a right arc-shaped hole arranged on the front and rear side walls of the right part of the bottom shell and cooperating with the left arc-shaped hole to form a pipeline through hole; a tight rotation handle passing through the bottom shell from right to left and capable of rotating to adjust the length; a pressing plate fixedly connected to the front end of the tight rotation handle; a second arc-shaped groove arranged on the pressing plate along the front-rear direction and matching the first arc-shaped groove; a simulated blood vessel to be connected that can be clamped by the left arc-shaped hole and the right arc-shaped hole and can be deformed by the extrusion of the first arc-shaped groove and the second arc-shaped groove.

Description

Technical Field

[0001] The present invention relates to a continuous precision flow regulator for simulating peripheral vascular resistance, belonging to the technical field of metrological design. Background Art

[0002] Oscillometric electronic sphygmomanometers are easy to operate, not affected by human factors, and have relatively good repeatability, and have been more and more widely used. At present, metrological technical institutions mostly use non-invasive blood pressure simulators to detect the accuracy of electronic sphygmomanometers. However, the envelope lines set inside the simulator are also empirical values based on statistics, which can only achieve repeated measurements of electronic sphygmomanometers, and cannot achieve the traceability of the measured values of the accuracy of dynamic blood pressure measurement.

[0003] The bionic human cardiovascular system is an important carrier for conducting human cardiovascular research in the medical field, and the simulation of peripheral vascular resistance is a key factor. When testing with an oscillometric electronic sphygmomanometer dynamic traceability device that mimics the human cardiovascular system (such as mimicking the human heart and the human vascular system), it is difficult to achieve the simulation and regulation of blood vessel pressure with the existing technology.

[0004] Reference Patent: Chinese patent document with publication number CN115969343A and publication date April 18, 2023: "An Oscillometric Electronic Sphygmomanometer Dynamic Traceability Device". Summary of the Invention

[0005] In order to achieve the simulation of bionic peripheral vascular resistance, the present invention provides a precision flow regulator for simulating peripheral vascular resistance. By installing this regulating valve in a pipeline (simulating blood vessels), the diameter of the simulated blood vessel passage can be changed to adjust the blood flow rate, so as to achieve the purpose of changing bionic peripheral vascular resistance.

[0006] For the application background of this precision flow regulator, please refer to CN115969343A.

[0007] The present invention adopts the following technical solutions:

[0008] A precision flow regulator for simulating peripheral vascular resistance, comprising: an integrated upper shell 1; a bottom shell 5 divided into left and right parts; a stop block fixedly arranged inside the left part of the bottom shell and flush with the right end; a first arc-shaped groove 7 arranged on the right side of the stop block along the front-rear direction; a left arc-shaped hole arranged on the front and rear side walls of the left part of the bottom shell 5 and corresponding to the position of the first arc-shaped groove 7; a right arc-shaped hole arranged on the front and rear side walls of the right part of the bottom shell 5 and cooperating with the left arc-shaped hole to form a pipeline through-hole 6; a tight rotation handle 3 passing through the bottom shell 5 from right to left and capable of rotating to adjust the length; a pressing plate 4 fixedly connected to the front end of the tight rotation handle 3; a second arc-shaped groove 8 matching the first arc-shaped groove 7 arranged on the pressing plate 4 along the front-rear direction; a simulated blood vessel to be connected that can be clamped by the left arc-shaped hole and the right arc-shaped hole and can be deformed by the extrusion of the first arc-shaped groove 7 and the second arc-shaped groove 8.

[0009] Preferably, the upper shell 1 and the bottom shell 5 are detachably fixed.

[0010] Further, the upper shell 1 and the bottom shell 5 are fixedly connected by four vertical bolts.

[0011] Further, it further includes a controller signal-connected to the tight rotation handle 3, and the controller forms a one-to-one correspondence between the scale of the tight rotation handle 3 and the flow rate.

[0012] Even further, it further includes a digital display 2 arranged on the upper shell 1, and the digital display real-time displays the flow rate of the simulated blood vessel.

[0013] Preferably, the arc radii of the first arc-shaped groove 7 and the second arc-shaped groove 8 are equal, and both are smaller than the outer diameter of the cross-section of the simulated blood vessel.

[0014] Further, the radian of each arc surface of the first arc-shaped groove 7 and the second arc-shaped groove 8 is 180°.

[0015] Preferably, a linear guiding structure matching the pressing plate 4 is arranged at the inner bottom of the bottom shell 5.

[0016] Further, a battery, a wire arrangement of the digital display 2, a PCB board, a displacement sensor and a temperature sensor are arranged in the area on the left side of the stop block in the bottom shell part; the displacement sensor is connected to the controller, monitors the left-right displacement of the pressing plate 4, and forms a one-to-one correspondence between the displacement and the flow rate.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1) Precise adjustment on a small diameter scale, with very high adjustment accuracy of the flow rate;

[0019] 2) The physical scale of the knob and the digital display screen on the upper shell can real-time display the current flow rate condition, and the operation is intuitive and convenient;

[0020] 3) Good adaptability. The partially modular design can adapt to diverse pipeline systems, and the detachable bottom shell design enables the installation of this device without disrupting the original pipeline connections.

[0021] 4) Customizable. The modular design allows for the addition of other sensors according to user requirements and outputs data through a digital display. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the precision flow regulator for simulating peripheral vascular resistance of the present invention (when the upper shell is opened).

[0023] Figure 2 is a perspective view of the precision flow regulator for simulating peripheral vascular resistance of the present invention. Among them, (a) is the axonometric view and (b) is the side view.

[0024] Figure 3 is a top view of the precision flow regulator for simulating peripheral vascular resistance of the present invention (removing the upper shell).

[0025] Figure 4 is a front perspective view of the precision flow regulator for simulating peripheral vascular resistance of the present invention inserted into the pipeline to be connected.

[0026] Figure 5 is a perspective three-dimensional view of the precision flow regulator for simulating peripheral vascular resistance of the present invention inserted into the pipeline to be connected.

[0027] Figure 6 is a schematic diagram of the precision flow regulator for simulating peripheral vascular resistance of the present invention after being sectioned at the pipeline through-hole.

[0028] In the figure, 1. Upper shell, 2. Digital display, 3. Tight rotating handle, 4. Pressure plate, 5. Bottom shell, 6. Pipeline through-hole, 7. First arc-shaped groove, 8. Second arc-shaped groove. Detailed Embodiment

[0029] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0030] The control and regulation of small flow rates have extensive applications in the medical field, such as the control of infusion flow rates and human cardiovascular research.

[0031] The application environment of the "precision flow regulator for simulating peripheral vascular resistance" (hereinafter referred to as the "precision flow regulator") introduced in this embodiment is based on the "oscillometric method electronic blood pressure meter dynamic traceability device" in CN115969343A and is used to monitor and precisely regulate the flow rate of the simulated blood vessel.

[0032] This patented precision flow regulator can be installed without damaging the original pipeline. By precisely adjusting the handle knob, it can push the specially designed pressure plate forward, change the diameter of the pipeline to adjust the blood flow, and achieve the control and regulation of the flow rate.

[0033] See Figure 1-6 , this precision flow regulator mainly consists of the following six parts:

[0034] Upper shell 1; digital display 2; precision knob handle 3; pressure plate 4; bottom shell 5; pipeline through-hole 6. The bottom shell 5 and the upper shell 1 are collectively referred to as the shell.

[0035] The upper shell 1 integrates the digital display 2 and is installed on the bottom shell 5 with four screws, and at the same time plays a role in fixing the left and right areas of the bottom shell;

[0036] Based on the principle of screw amplification, the precision knob handle 3 converts the precession of the axial screw driving the pressure plate 4 into the rotation of the precision knob of the handle. For each rotation of the knob, the screw will drive the pressure plate forward by a fixed distance (designed according to the need to match the thread size). Scales are engraved on the knob and the screw respectively, and the scales are equipped with corresponding pipe diameters and flow rate multiples for the convenience of users to read;

[0037] The three parts of the pressure plate 4, the bottom shell 5, and the pipeline through-hole 6 are semi-modular designs and can be redesigned and replaced according to different usage scenarios.

[0038] The pressure plate 4 is a pressure plate that can be simply disassembled and replaced. The slot on the side that squeezes the pipeline can be modified according to the size of the pipeline to ensure that the pipeline can maintain its original shape as much as possible after being deformed by pressure;

[0039] Pipeline through-holes 6 are opened on both sides of the bottom shell 5, and the size is determined according to the diameter of the connected pipeline. A stop block is provided in the middle of the bottom shell along the front-back direction. A beam-shaped structure (first arc surface groove 7) with a slot is provided on the stop block along the front-back direction, and the shape of the slot is the same as the shape of the pipeline when it is not under pressure. The stop block divides the bottom shell into left and right areas, as Figure 1-2 shown.

[0040] A second arc surface groove 8 matching the first arc surface groove 7 is provided on the pressure plate 4 along the front-back direction; the simulated blood vessel passes through a pair of pipeline through-holes 6 and can be deformed by the extrusion of the first arc surface groove 7 and the second arc surface groove 8.

[0041] The controller is signal-connected to the tightly rotated handle 3, and the controller forms a one-to-one correspondence between the scale of the tightly rotated handle 3 and the flow rate.

[0042] The digital display 2 is arranged on the upper shell, and the digital display displays the flow rate of the simulated blood vessel in real time.

[0043] As a preferred solution, the arc surface radii of the first arc surface groove 7 and the second arc surface groove 8 are equal, and are both smaller than the radius of the cross-section of the simulated blood vessel. The radian of the arc surface of each of the first arc surface groove 7 and the second arc surface groove 8 is 180°.

[0044] As a preferred solution, a linear guiding structure matching the pressing plate 4 is provided at the inner bottom of the bottom shell 5, as Figure 2 and 3 shown.

[0045] When installing the simulated blood vessel, the bottom shell can be disassembled along the pipeline through hole 6 so as to access this device in the pipeline system without damaging the existing connections. As Figure 1-2 , the right area (the slightly larger area) is used to place the pressing plate 4 and connect the precision knob handle 3; the left area (the slightly smaller area) can be used to place the battery, the display screen cable, the PCB and the corresponding sensors, that is, the blank area in the figure. The sensors can be selected and installed according to the user's needs, including a displacement sensor (recording the data of the advancing distance of the pressing plate, and the controller can calculate and process to obtain the state of the pipe diameter under pressure, and the data can be synchronized with the physical scale of the precision knob handle) and a temperature sensor (recording the temperature of the fluid in the pipeline).

[0046] It should be noted that in this embodiment, the left side, the right side, the front side and the rear side are defined by taking the direction marks in the appendix Figure 1 as an example. Actually, these directions can be interchanged without affecting the essential definition of the present invention.

[0047] The above are the preferred embodiments of the present invention. Those of ordinary skill in the art can also make various transformations or improvements on this basis. Without departing from the general concept of the present invention, these transformations or improvements should fall within the scope of protection required by the present invention.

Claims

1. A precision flow regulator for simulating peripheral vascular resistance, characterized in that, it includes: An integral upper shell (1); A bottom shell (5) divided into left and right parts; A stop block fixedly arranged inside the left part of the bottom shell and flush with the right end; a first arc-shaped groove (7) is arranged on the right side of the stop block along the front-rear direction; Left arc-shaped holes arranged on the front and rear side walls of the left part of the bottom shell (5) and corresponding to the position of the first arc-shaped groove (7); Right arc-shaped holes arranged on the front and rear side walls of the right part of the bottom shell (5) and cooperating with the left arc-shaped holes to form a pipeline through-hole (6); A tight rotation handle (3) passing through the bottom shell (5) from right to left and capable of rotating to adjust the length; A pressing plate (4) fixedly connected to the front end of the tight rotation handle (3); a second arc-shaped groove (8) matching the first arc-shaped groove (7) is arranged on the pressing plate (4) along the front-rear direction; A simulated blood vessel to be connected that can be clamped by the left arc-shaped hole and the right arc-shaped hole and can be deformed by the extrusion of the first arc-shaped groove (7) and the second arc-shaped groove (8); It further includes a controller signal-connected to the tight rotation handle (3), and the controller forms a one-to-one correspondence between the scale of the tight rotation handle (3) and the flow rate; The arc radii of the first arc-shaped groove (7) and the second arc-shaped groove (8) are equal and are both smaller than the outer diameter of the cross-section of the simulated blood vessel.

2. The precision flow regulator for simulating peripheral vascular resistance according to claim 1, characterized in that: The upper shell (1) and the bottom shell (5) are detachably fixed.

3. The precision flow regulator for simulating peripheral vascular resistance according to claim 2, characterized in that: The upper shell (1) and the bottom shell (5) are fixedly connected by four vertical bolts.

4. The precision flow regulator for simulating peripheral vascular resistance according to claim 1, characterized in that: It further includes a digital display (2) arranged on the upper shell (1), and the digital display real-time displays the flow rate of the simulated blood vessel.

5. The precision flow regulator for simulating peripheral vascular resistance according to claim 1, characterized in that: The radian of each arc surface of the first arc-shaped groove (7) and the second arc-shaped groove (8) is 180°.

6. The precision flow regulator for simulating peripheral vascular resistance according to claim 1, characterized in that: A linear guiding structure matching the pressing plate (4) is arranged at the inner bottom of the bottom shell (5).

7. The precision flow regulator for simulating peripheral vascular resistance according to claim 4, characterized in that: A battery, a wiring harness of the digital display (2), a PCB board, a displacement sensor and a temperature sensor are arranged in the area on the left side of the stop block in the bottom shell part; the displacement sensor is connected to the controller to monitor the left and right displacement of the pressing plate (4) and form a one-to-one correspondence between the displacement and the flow rate.

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