阅读说明：本技术 医用离心泵 (Medical centrifugal pump ) 是由 潘玉春 黄周平 于 2021-10-08 设计创作，主要内容包括：本发明提供一种医用离心泵,属于医疗用品制造领域,本发明包括：泵壳,以及设置于泵壳内可转动的转子；转子为纺锤形结构；泵壳的顶部设置有输入口,泵壳的侧边设置有输出口；输入口上设置有宝塔接口,该宝塔接口的轴线位于纺锤形结构的一条侧边的延长线上；泵壳的底部设置有底壳,该底壳上设置有定位缺口,底壳通过定位缺口安装在泵壳的底部；泵壳的顶部设置有上定位槽,底壳上安装有下定位槽；转子的两端分别通过上定位槽和下定位槽安装于泵壳内。本发明通过转子旋转到一定的转速所产生的离心力,将血液通过输出口排出；该输入口角度与转子的侧边呈平行关系,可以使血液流入更柔和,提高了流体力学的效应,减少了血细胞损伤。(The invention provides a medical centrifugal pump, which belongs to the field of medical article manufacturing and comprises the following components: a pump housing, and a rotor rotatably disposed within the pump housing; the rotor is in a spindle-shaped structure; the top of the pump shell is provided with an input port, and the side edge of the pump shell is provided with an output port; a pagoda interface is arranged on the input port, and the axis of the pagoda interface is positioned on the extension line of one side edge of the spindle-shaped structure; the bottom of the pump shell is provided with a bottom shell, a positioning gap is formed in the bottom shell, and the bottom shell is installed at the bottom of the pump shell through the positioning gap; an upper positioning groove is formed in the top of the pump shell, and a lower positioning groove is formed in the bottom shell; the two ends of the rotor are respectively arranged in the pump shell through the upper positioning groove and the lower positioning groove. The invention discharges the blood through the output port by the centrifugal force generated by the rotation of the rotor to a certain rotating speed; the angle of the input port is parallel to the side edge of the rotor, so that blood can flow into the rotor more softly, the hydrodynamic effect is improved, and the blood cell damage is reduced.)

1. A medical centrifugal pump, comprising: a pump housing, and a rotor rotatably disposed within the pump housing; the rotor is in a spindle-shaped structure;

an input port is arranged at the top of the pump shell, and an output port is arranged at the side edge of the pump shell; a pagoda interface is arranged on the input port, and the axis of the pagoda interface is positioned on the extension line of one side edge of the spindle-shaped structure;

the bottom of the pump shell is provided with a bottom shell, a positioning gap is formed in the bottom shell, and the bottom shell is installed at the bottom of the pump shell through the positioning gap;

an upper positioning groove is formed in the top of the pump shell, and a lower positioning groove is formed in the bottom shell; and two ends of the rotor are respectively installed in the pump shell through the upper positioning groove and the lower positioning groove.

2. The medical centrifugal pump of claim 1, wherein the pagoda interface has a drift diameter of 3/8 inches or 1/4 inches; the inner diameter of the pagoda interface is 10.00mm, and the outer diameter of the pagoda interface is 11.28 mm; the diameter of the bottom of the input port is 20.39 mm.

3. The medical centrifugal pump of claim 2, wherein said outlet is a pagoda interface having a distal end with an inner diameter of 9.5mm and an outer diameter of 11.1 mm.

4. The medical centrifugal pump of claim 1, wherein said upper positioning groove is located at a central position inside an upper portion of said pump casing, said upper positioning groove comprising two cylinders connected in series; the cylinder comprises an upper cylinder and a lower cylinder, and a spherical groove with the radius of 2.5mm is formed in the bottom surface of the lower cylinder;

the height of the upper cylinder is 1.5mm, and the diameter of the upper cylinder is 9.1 mm; the height of the lower cylinder is 2.5mm, and the diameter of the lower cylinder is 6.2 mm.

5. The medical centrifugal pump of claim 1, wherein said lower positioning groove is located at a central position inside said bottom casing, said lower positioning groove comprising two consecutive truncated cones; the circular truncated cone comprises an upper circular truncated cone and a lower circular truncated cone, and a spherical groove with the radius of 2.5mm is formed in the top surface of the upper circular truncated cone;

the upper round table is 1.8mm in height and 10mm in diameter; the height of the lower round table is 1.03mm, and the diameter of the lower round table is 11 mm.

6. The medical centrifugal pump of any one of claims 1 to 3, wherein said rotor comprises: a conical runner and an umbrella-shaped base; the umbrella-shaped base is clamped at the bottom of the conical rotating wheel, and a magnetic disk is further arranged between the umbrella-shaped base and the conical rotating wheel;

six propelling fins which are centrosymmetrically distributed are arranged on the upper surface of the conical rotating wheel; two symmetrical brushing fins are arranged at the bottom of the umbrella-shaped base; the top of the conical rotating wheel is provided with a top ceramic supporting shaft; and a bottom ceramic support shaft is arranged at the bottom of the umbrella-shaped base.

7. The medical centrifugal pump of claim 6, wherein said top ceramic support shaft has a radius of 1.81mm, said top ceramic support shaft being in contact with said upper positioning groove;

the radius of the bottom ceramic support shaft is 1.50mm, and the bottom ceramic support shaft is in contact with the lower positioning groove.

8. The medical centrifugal pump of claim 6, wherein each said propulsion fin is 1.71mm wide and 26.75mm long; the diameter of the conical rotating wheel is 61.2 mm; each brushing fin is 26.0mm in length and 2.0mm in width.

9. The medical centrifugal pump according to claim 6, wherein the magnetic disc is embedded in the lower portion of the rotor, a stopper is provided in the tapered rotating wheel, and the magnetic disc is engaged with the rotor through the stopper;

the centrifugal pump further comprises: an external drive motor; the drive motor is positioned outside the pump shell and corresponds to the magnetic disc; the outer diameter of the magnetic disk is 54.86mm, and the inner diameter of the magnetic disk is 20.14 mm; the height of the edge of the magnetic disk is 1.54mm, and the height of the middle of the magnetic disk is 4.0 mm.

10. The medical centrifugal pump of any one of claims 1 to 3, wherein said pump housing is a polycarbonate housing.

Technical Field

The invention relates to the manufacturing technology of medical instruments, in particular to a medical centrifugal pump, and belongs to the technical field of medical article manufacturing.

Background

The application fields of the medical centrifugal pump head mainly include extracorporeal circulation in cardiac operation, auxiliary circulation of ventricles, cardiac transplantation operation, extracorporeal membrane lung support, aorta operation, extracorporeal circulation in liver and kidney transplantation and the like. In the traditional centrifugal pump head, because the rotor shaft sealing part has friction, when the centrifugal pump runs at high speed, larger heat can be generated, so that blood cells are easily damaged, and the blood stagnation at the rotor shaft sealing part is still and easily causes thrombus.

Therefore, a medical centrifugal pump which can reduce blood damage, work stably and greatly improve the protection capability of blood is urgently needed in the prior art.

Disclosure of Invention

The invention provides a novel medical centrifugal pump, which solves the technical problem that blood cells are easily damaged in the medical centrifugal pump in the prior art by reasonably setting the angle and the position of an input port and matching with a rotor with a special shape.

The medical centrifugal pump of the embodiment of the invention comprises: a pump housing, and a rotor rotatably disposed within the pump housing; the rotor is in a spindle-shaped structure;

an input port is arranged at the top of the pump shell, and an output port is arranged at the side edge of the pump shell; a pagoda interface is arranged on the input port, and the axis of the pagoda interface is positioned on the extension line of one side edge of the spindle-shaped structure;

the bottom of the pump shell is provided with a bottom shell, a positioning gap is formed in the bottom shell, and the bottom shell is installed at the bottom of the pump shell through the positioning gap;

an upper positioning groove is formed in the top of the pump shell, and a lower positioning groove is formed in the bottom shell; and two ends of the rotor are respectively installed in the pump shell through the upper positioning groove and the lower positioning groove.

The medical centrifugal pump as described above, wherein the pagoda interface has a drift diameter of 3/8 inches or 1/4 inches; the inner diameter of the pagoda interface is 10.00mm, and the outer diameter of the pagoda interface is 11.28 mm; the diameter of the bottom of the input port is 20.39 mm.

The medical centrifugal pump as described above, wherein the output port is a pagoda interface, and the inner diameter of the tail end of the pagoda interface is 9.5mm and the outer diameter is 11.1 mm.

The medical centrifugal pump is characterized in that the upper positioning groove is positioned at the center of the inner side of the upper part of the pump shell, and the upper positioning groove comprises two cylinders which are connected in sequence; the cylinder comprises an upper cylinder and a lower cylinder, and a spherical groove with the radius of 2.5mm is formed in the bottom surface of the lower cylinder;

the height of the upper cylinder is 1.5mm, and the diameter of the upper cylinder is 9.1 mm; the height of the lower cylinder is 2.5mm, and the diameter of the lower cylinder is 6.2 mm.

The medical centrifugal pump is characterized in that the lower positioning groove is positioned in the center of the inner side of the bottom shell, and the lower positioning groove comprises two sequentially connected round tables; the circular truncated cone comprises an upper circular truncated cone and a lower circular truncated cone, and a spherical groove with the radius of 2.5mm is formed in the top surface of the upper circular truncated cone;

the upper round table is 1.8mm in height and 10mm in diameter; the height of the lower round table is 1.03mm, and the diameter of the lower round table is 11 mm.

The medical centrifugal pump as described above, wherein the rotor includes: a conical runner and an umbrella-shaped base; the umbrella-shaped base is clamped at the bottom of the conical rotating wheel, and a magnetic disk is further arranged between the umbrella-shaped base and the conical rotating wheel;

six propelling fins which are centrosymmetrically distributed are arranged on the upper surface of the conical rotating wheel; two symmetrical brushing fins are arranged at the bottom of the umbrella-shaped base; the top of the conical rotating wheel is provided with a top ceramic supporting shaft; and a bottom ceramic support shaft is arranged at the bottom of the umbrella-shaped base.

The medical centrifugal pump is characterized in that the radius of the top ceramic support shaft is 1.81mm, and the top ceramic support shaft is in contact with the upper positioning groove;

the radius of the bottom ceramic support shaft is 1.50mm, and the bottom ceramic support shaft is in contact with the lower positioning groove.

The medical centrifugal pump as described above, wherein each of the pushing fins has a width of 1.71mm and a length of 26.75 mm; the diameter of the conical rotating wheel is 61.2 mm; each brushing fin is 26.0mm in length and 2.0mm in width.

The medical centrifugal pump is characterized in that the magnetic disc is embedded in the lower part of the rotor, a limiting block is arranged in the conical rotating wheel, and the magnetic disc is clamped in the rotor through the limiting block;

the centrifugal pump further comprises: an external drive motor; the drive motor is positioned outside the pump shell and corresponds to the magnetic disc; the outer diameter of the magnetic disk is 54.86mm, and the inner diameter of the magnetic disk is 20.14 mm; the height of the edge of the magnetic disk is 1.54mm, and the height of the middle of the magnetic disk is 4.0 mm.

The medical centrifugal pump as described above, wherein the pump casing is a polycarbonate casing.

The invention discharges the blood through the output port by the centrifugal force generated by the rotation of the rotor to a certain rotating speed; the angle of the input port is parallel to the side edge of the rotor, so that blood can flow into the rotor more softly, the hydrodynamic effect is improved, and the blood cell damage is reduced.

In addition, in the invention, the outer surface of the rotor is provided with a smooth cone structure, so that the shearing force of the rotating wheel to blood cells in the rotating process is extremely low; six exquisite propelling fins can reduce turbulence to the maximum extent; the bottom of the pump head is provided with the brushing fins, so that blood can be prevented from being silted at the bottom of the pump head; the magnetic disc is embedded in the rotating wheel; the structure reduces the number of mechanical components to the maximum extent, and greatly improves the protection capability of the blood.

Drawings

Fig. 1 is a structural view of a medical centrifugal pump of an embodiment of the present invention;

FIG. 2 is a side sectional structural view of the medical centrifugal pump of the embodiment of the invention;

FIG. 3 is a view showing the structure of the upper positioning groove in FIG. 2;

FIG. 4 is a structural view of the lower positioning groove in FIG. 2;

FIG. 5 is a block diagram of the conical runner of the rotor of FIG. 2;

FIG. 6 is a block diagram of the umbrella base of the rotor of FIG. 2;

fig. 7 is a structural view of a magnetic disk of the rotor of fig. 2.

Detailed Description

The medical centrifugal pump of the present invention can be made of, but is not limited to, the following materials, for example: plastic, magnets, ceramic, silicone, polycarbonate, and the like.

Fig. 1 is a block diagram of a medical centrifugal pump according to an embodiment of the present invention; with reference to fig. 2 to 7.

The medical centrifugal pump of the present embodiment includes: the rotor comprises a pump shell 1 and a rotor 2 which is arranged in the pump shell 1 and can rotate; the rotor 2 is of a spindle-shaped structure; when the external magnetic drive is established, the inner rotor 2 starts to rotate, thereby achieving the centrifugal pump action.

An input port 11 is arranged at the top of the pump shell 1, and an output port 12 is arranged at the side edge of the pump shell 1; a pagoda interface is arranged on the input port 11, and the axis of the pagoda interface is positioned on the extension line of one side edge of the spindle-shaped structure; that is, the angle of the input port 11 is substantially parallel to the surfaces of the pump housing 1 and the rotor 2, so that the blood flows into the centrifugal pump head more gently; meanwhile, since the extension of the side edge of the rotor 2 necessarily passes through the axis of the rotor, the input port 11 is also located at the center of the top of the pump housing 1.

The centrifugal pump of the present embodiment generates a centrifugal force by the rotation of the inner rotor 2 to the blood at the edge of the inner rotor 2 and flows out through the output port 12.

The bottom of the pump shell 1 is provided with a bottom shell 12, a positioning gap is arranged on the bottom shell 13, and the bottom shell 13 is installed at the bottom of the pump shell 1 through the positioning gap;

an upper positioning groove 3 is formed in the top of the pump shell 1, and a lower positioning groove 4 is formed in the bottom shell; and two ends of the rotor 2 are respectively installed in the pump shell 1 through the upper positioning groove 3 and the lower positioning groove 4. Because the movable part of the whole body formed by the pump shell only contacts the rotor and the upper positioning groove 3 and the lower positioning groove 4, the heat generated by friction is greatly reduced.

The pump housing 1 is made of polycarbonate material, generally polycarbonate housing, and has excellent durability and chemical corrosion resistance.

The inlet of the pump shell of the invention receives the liquid (blood) which is sucked by negative pressure and enters the interior of the pump shell, and the liquid (blood) is discharged through the outlet by the centrifugal force generated by the rotation of the inner rotor to a certain rotating speed; the angle of the input port is basically parallel to the pump shell and the internal rotor, so that blood can flow into the pump shell more softly, the hydrodynamic effect is improved, and the blood cell damage is reduced; the supporting and positioning part of the rotor 2 is of an open structure, so that blood is prevented from being stagnated; the structure reduces the number of mechanical components to the maximum extent, and greatly improves the protection capability of the blood.

In the practical use process, the input port 11 and the output port 12 are both two-stage barb pagoda-shaped interfaces, which can be 1/4 inches or 3/8 inches, so that the two types of barb pagoda-shaped interfaces are convenient to connect corresponding pipelines and are not easy to loosen.

The path of the pagoda interface at input port 11 is 3/8 inches or 1/4 inches; the inner diameter of the pagoda interface is 10.00mm, and the outer diameter of the pagoda interface is 11.28 mm; the diameter of the bottom of the input port is 20.39 mm.

Typically, the outlet is a pagoda interface, and the inner diameter of the tail end of the pagoda interface is 9.5mm, and the outer diameter of the tail end of the pagoda interface is 11.1 mm.

The upper positioning groove 3 is positioned in the center of the inner side of the upper part of the pump shell 1, and the upper positioning groove 3 comprises two cylinders which are connected in sequence; the cylinder comprises an upper cylinder 32 and a lower cylinder 31, and a spherical groove 30 with the radius of 2.5mm is formed in the bottom surface of the lower cylinder 31;

the upper cylinder 32 has a height of 1.5mm and a diameter of 9.1 mm; the lower cylinder 31 has a height of 2.5mm and a diameter of 6.2 mm.

Further, the lower positioning groove 4 is located in the center of the inner side of the bottom case 13, and the lower positioning groove 4 comprises two sequentially connected circular truncated cones; the circular truncated cone comprises an upper circular truncated cone 41 and a lower circular truncated cone 42, and a spherical groove 40 with the radius of 2.5mm is formed in the top surface of the upper circular truncated cone 41;

the upper round table 41 is 1.8mm in height and 10mm in diameter; the height of the lower round table 42 is 1.03mm, and the diameter of the lower round table is 11 mm.

In the medical centrifugal pump of the present embodiment, the rotor 2 includes: a conical runner 21 and an umbrella-shaped base 22; the umbrella-shaped base 22 is clamped at the bottom of the conical rotating wheel 21, and a magnetic disc 23 is further arranged between the umbrella-shaped base 22 and the conical rotating wheel 21;

the outer surface of the conical rotating wheel is of a smooth conical body structure, so that the rotating wheel has low shearing force on blood cells during rotation, and blood is protected to the maximum extent.

The upper surface of the conical rotating wheel 21 is provided with six propelling fins 210 which are distributed in a centrosymmetric manner; the bottom of the umbrella-shaped base 22 is provided with two symmetrical brushing fins 220; the top of the conical rotating wheel 21 is provided with a top ceramic supporting shaft 211; the bottom of the umbrella-shaped base 22 is provided with a bottom ceramic supporting shaft 221.

The six pusher fins 210, which are symmetrically distributed, have extremely low shear stress even around the pusher fins, so as to minimize turbulence and protect the blood.

Specifically, the axial radius of the top ceramic support 211 is 1.81mm, and the top ceramic support shaft 211 is in contact with the upper positioning groove 3;

the radius of the bottom ceramic support shaft 221 is 1.50mm, and the bottom ceramic support shaft 221 is in contact with the lower positioning groove 4.

The top ceramic support shaft and the bottom ceramic support shaft are made of ceramic materials, so that friction can be reduced, and heat production is reduced.

In this embodiment, each of the pushing fins 210 has a width of 1.71mm and a length of 26.75 mm; the diameter of the conical rotating wheel 21 is 61.2 mm; each of the wiping fins 220 has a length of 26.0mm and a width of 2.0 mm.

In the medical centrifugal pump of this embodiment, the magnetic disc 23 is embedded in the lower portion of the rotor 2, a limit block is arranged in the tapered rotating wheel 21, and the magnetic disc 23 is clamped in the rotor 2 through the limit block;

the centrifugal pump further comprises: an external drive motor; the drive motor is positioned outside the pump housing 1 and corresponds to the magnetic disk 23; the outer diameter of the magnetic disc 23 is 54.86mm, and the inner diameter of the magnetic disc is 20.14 mm; the height of the edge of the magnetic disk 23 is 1.54mm, and the height of the middle part of the magnetic disk is 4.0 mm.

In addition, the medical centrifugal pump is low in manufacturing cost, small and exquisite, compact in structural design, stable in finished product quality, convenient to use and suitable for various medical blood pumps.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. Through the above description of the embodiments, those skilled in the art will clearly understand that the above embodiment method can be implemented by some modifications plus the necessary general technical overlap; of course, the method can also be realized by simplifying some important technical features in the upper level. Based on such understanding, the technical solution of the present invention essentially or contributing to the prior art is: overall function and construction, and to cooperate with the structure described in the various embodiments of the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.