阅读说明：本技术 医用离心泵头 (Medical centrifugal pump head ) 是由 黄周平 于 2021-10-08 设计创作，主要内容包括：本发明涉及医疗技术领域,具体涉及一种医用离心泵头；本发明包括：泵壳,以及可旋转的安装于泵壳内的诱导轮；诱导轮底部设置有磁体；泵壳上设置有液体进入口和液体推出口；泵壳内设置有顶部定位套和底部定位套；诱导轮的轴线处具有可绕其转动的定位杆,该定位杆的两端分别连接顶部定位套和底部定位套；液体进入口的截面随液体流入方向逐渐增大,液体进入口位于泵壳顶部中心位置；诱导轮上设置有多个侧面倾斜布置的叶片,液体推出口与叶片之间角度呈45度；泵壳的底部设置有多个可与外部设备相连的定位缺口。本发明采用了无轴承设计,摩擦更少产热更低；保证了在离心泵头的液体进入口及液体推出口均没有漩涡,且加速均匀,保持最佳的血流动。(The invention relates to the technical field of medical treatment, in particular to a medical centrifugal pump head; the invention comprises the following steps: the inducer is rotatably arranged in the pump shell; the bottom of the inducer is provided with a magnet; the pump shell is provided with a liquid inlet and a liquid outlet; a top positioning sleeve and a bottom positioning sleeve are arranged in the pump shell; the axis of the inducer is provided with a positioning rod which can rotate around the inducer, and two ends of the positioning rod are respectively connected with a top positioning sleeve and a bottom positioning sleeve; the section of the liquid inlet is gradually increased along with the liquid inflow direction, and the liquid inlet is positioned at the center of the top of the pump shell; the inducer is provided with a plurality of blades with side surfaces obliquely arranged, and an angle between the liquid pushing-out port and the blades is 45 degrees; the bottom of the pump shell is provided with a plurality of positioning notches which can be connected with external equipment. The invention adopts the design without bearing, the friction is less, and the heat production is lower; the liquid inlet and the liquid outlet of the centrifugal pump head are ensured to have no vortex, the acceleration is uniform, and the optimal blood flow is kept.)

1. A medical centrifugal pump head applicable to in vitro life support, comprising: the inducer comprises a pump shell and an inducer which is rotatably arranged in the pump shell; the bottom of the inducer is provided with a magnet;

the pump shell is provided with a liquid inlet and a liquid outlet; a top positioning sleeve and a bottom positioning sleeve are arranged in the pump shell; the axis of the inducer is provided with a positioning rod which can rotate around the inducer, and two ends of the positioning rod are respectively connected with the top positioning sleeve and the bottom positioning sleeve;

the section of the liquid inlet is gradually increased along the liquid inflow direction, and the liquid inlet is positioned at the center of the top of the pump shell; a plurality of blades with side surfaces obliquely arranged are arranged on the inducer, and an angle between the liquid pushing-out port and the blades is 45 degrees;

the bottom of the pump shell is provided with a plurality of positioning notches which can be connected with external equipment.

2. A medical centrifugal pump head according to claim 1, wherein the liquid inlet port and the liquid outlet port are both 3/8 inch second order pagoda ports or 1/4 inch second order pagoda ports.

3. A medical centrifugal pump head according to claim 1, wherein the inlet end of the liquid inlet port has an inner diameter of 10.00mm and an outer diameter of 11.28 mm; the diameter of the bottom of the liquid inlet is 20.39 mm.

4. A medical centrifugal pump head according to claim 3, wherein the liquid ejection port has a distal end inner diameter of 9.5mm and an outer diameter of 11.1 mm.

5. A medical centrifugal pump head according to claim 1, wherein the top and bottom positioning sleeves are located at upper and lower ends of a center of a pump housing, respectively; the top positioning sleeve and the bottom positioning sleeve have the same structure and are uniform cylinders with blind holes at one ends;

the length of the top positioning sleeve and the length of the bottom positioning sleeve are both 7.00mm, and the radius of the top positioning sleeve and the radius of the bottom positioning sleeve are both 1.5 mm; the depth of the blind hole on the blind hole is 6mm, and the radius of the blind hole is 0.75 mm.

6. A medical centrifugal pump head according to claim 1, wherein the vane comprises: six uniformly arranged large blades and six uniformly arranged small blades; one small blade is arranged between every two adjacent large blades;

the large blades and the small blades are distributed around the positioning rod in a centrosymmetric manner.

7. The medical centrifugal pump head of claim 6, wherein one end of the large blade is close to the positioning rod, and the other ends are both close to the edge of the inducer; the large blades are distributed along the radial direction in an arc shape.

8. The medical centrifugal pump head of claim 7, wherein a stop collar is disposed on the positioning rod; the positioning rod penetrates through the inducer and abuts against the bottom of the inducer through the limiting sleeve; the magnet is arranged at the bottom of the inducer.

9. A medical centrifugal pump head according to claim 8, wherein the magnet is an injection molded magnet; the magnet has an outer diameter of 27.08mm, an inner diameter of 13.77mm and a thickness of 7 mm.

10. A medical centrifugal pump head according to claim 1, wherein the positioning rod has a top diameter of 0.75mm, a bottom diameter of 0.75mm, and a length of 47.2 mm.

Technical Field

The invention relates to a manufacturing technology of medical supplies, in particular to a medical centrifugal pump head, and belongs to the technical field of production of medical auxiliary equipment.

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 sealing position of the inducer shaft 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 sealing position of the inducer shaft is still and easily causes thrombus.

Therefore, there is a need in the art for a medical centrifugal pump head that can reduce blood damage, work stably, and greatly improve the protection ability of blood.

Disclosure of Invention

The invention provides a novel medical centrifugal pump head, which adopts a spin-induced wheel design to reduce shearing force so as to reduce damage to blood cells; the curved inlet port design helps to slow down the acceleration of blood cells as blood enters the pump head; these two properties allow an optimal protection of the blood.

The invention provides a novel medical centrifugal pump head, comprising: the inducer comprises a pump shell and an inducer which is rotatably arranged in the pump shell; the bottom of the inducer is provided with a magnet;

the pump shell is provided with a liquid inlet and a liquid outlet; a top positioning sleeve and a bottom positioning sleeve are arranged in the pump shell; the axis of the inducer is provided with a positioning rod which can rotate around the inducer, and two ends of the positioning rod are respectively connected with the top positioning sleeve and the bottom positioning sleeve;

the section of the liquid inlet is gradually increased along the liquid inflow direction, and the liquid inlet is positioned at the center of the top of the pump shell; a plurality of blades with side surfaces obliquely arranged are arranged on the inducer, and an angle between the liquid pushing-out port and the blades is 45 degrees;

the bottom of the pump shell is provided with a plurality of positioning notches which can be connected with external equipment.

The medical centrifugal pump head as described above, wherein the liquid inlet port and the liquid outlet port are both 3/8 inch second order pagoda ports or 1/4 inch second order pagoda ports.

A medical centrifugal pump head as described above, wherein the inlet end of the liquid inlet port has an inner diameter of 10.00mm and an outer diameter of 11.28 mm; the diameter of the bottom of the liquid inlet is 20.39 mm.

The medical centrifugal pump head as described above, wherein the liquid push-out port has a distal end inner diameter of 9.5mm and an outer diameter of 11.1 mm.

The medical centrifugal pump head as described above, wherein the top positioning sleeve and the bottom positioning sleeve are respectively located at the upper end and the lower end of the center of the pump housing; the top positioning sleeve and the bottom positioning sleeve have the same structure and are uniform cylinders with blind holes at one ends;

the length of the top positioning sleeve and the length of the bottom positioning sleeve are both 7.00mm, and the radius of the top positioning sleeve and the radius of the bottom positioning sleeve are both 1.5 mm; the depth of the blind hole on the blind hole is 6mm, and the radius of the blind hole is 0.75 mm.

A medical centrifugal pump head as described above, wherein the vane comprises: six uniformly arranged large blades and six uniformly arranged small blades; one small blade is arranged between every two adjacent large blades;

the large blades and the small blades are distributed around the positioning rod in a centrosymmetric manner.

The medical centrifugal pump head as described above, wherein one end of the large blade is close to the positioning rod, and the other end of the large blade is close to the edge of the inducer; the large blades are distributed along the radial direction in an arc shape.

The medical centrifugal pump head as described above, wherein the positioning rod is provided with a stop collar; the positioning rod penetrates through the inducer and abuts against the bottom of the inducer through the limiting sleeve; the magnet is arranged at the bottom of the inducer.

The medical centrifugal pump head as described above, wherein the magnet is an injection molded magnet; the magnet has an outer diameter of 27.08mm, an inner diameter of 13.77mm and a thickness of 7 mm.

The medical centrifugal pump head as described above, wherein the top diameter of the positioning rod is 0.75mm, the bottom diameter is 0.75mm, and the length is 47.2 mm.

In the invention, the liquid inlet is designed to be narrow outside and wide inside, and the liquid inlet is designed in a bending way, so that the acceleration of blood cells entering the inside is greatly reduced, the blood flow is softer after flowing in, the hydrodynamic effect is greatly improved, and the blood cell damage is reduced; the angle between the liquid pushing port and the blade is basically 45 degrees, so that the blood can not flow backwards after being pushed out. The top locating sleeve and the bottom locating sleeve are located at the center of the pump shell and play a role in locating the internal inducer external member, the materials are low-friction durable materials, and long-time use of the centrifugal pump head is guaranteed, and blood cells cannot be deposited at the position.

The whole movable part of the pump head only contacts the positioning rod and the positioning sleeve, so that the heat generated by friction is greatly reduced, and the whole heat generated by the pump head is greatly reduced.

Drawings

FIG. 1 is a generally schematic view of a medical centrifugal pump head according to an embodiment of the present invention;

FIG. 2 is a schematic vertical cross-sectional view of a medical centrifugal pump head according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of the positioning sleeve of FIG. 2;

FIG. 4 is a schematic structural view of the built-in inducer kit of FIG. 2;

FIG. 5 is another angle structure diagram of the built-in inducer kit of FIG. 2;

fig. 6 is a schematic view of the magnet structure 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 an overall schematic view of a medical centrifugal pump head according to an embodiment of the present invention, and with reference to fig. 2 to 6, the medical centrifugal pump head according to the embodiment includes: the method comprises the following steps: the device comprises a pump shell 1 and an inducer 2 which is rotatably arranged in the pump shell 1; the bottom of the inducer 2 is provided with a magnet 4; when an external magnetic drive is established, the internal inducer 2 begins to rotate under the drive of the magnet 4, thereby achieving the effect of a centrifugal pump head.

The pump shell 1 is provided with a liquid inlet 11 and a liquid outlet 12; a top positioning sleeve and a bottom positioning sleeve are arranged in the pump shell 1; the axis of the inducer 2 is provided with a positioning rod 20 which can rotate around the inducer, and two ends of the positioning rod 20 are respectively connected with the top positioning sleeve and the bottom positioning sleeve; the whole movable part of the pump head only contacts the positioning rod and the positioning sleeve, so that the heat generated by friction is greatly reduced, and the whole heat generated by the pump head is greatly reduced.

The section of the liquid inlet 11 is gradually increased along the liquid inflow direction, and the liquid inlet 11 is positioned at the top center of the pump shell 1; a plurality of blades with inclined side surfaces are arranged on the inducer 2, and an angle between the liquid pushing-out port 12 and the blades is 45 degrees; in the invention, the liquid inlet is designed to be narrow outside and wide inside, and the liquid inlet is designed in a bending way, so that the acceleration of blood cells entering the inside is greatly reduced, the blood flow is softer after flowing in, the hydrodynamic effect is greatly improved, and the blood cell damage is reduced; the angle between the liquid pushing port and the blade is basically 45 degrees, so that the blood can not flow backwards after being pushed out. The top locating sleeve and the bottom locating sleeve are located at the center of the pump shell and play a role in locating the internal inducer external member, the materials are low-friction durable materials, and long-time use of the centrifugal pump head is guaranteed, and blood cells cannot be deposited at the position.

The bottom 13 of the pump housing 1 is provided with a plurality of positioning notches 14 which can be connected with external equipment.

Generally, the liquid inlet and the liquid outlet are both 3/8 inch second-order pagoda interfaces or 1/4 inch second-order pagoda interfaces, which facilitate connection of corresponding pipelines and are not easy to loosen.

Further, the inlet end of the liquid inlet 11 has an inner diameter of 10.00mm and an outer diameter of 11.28 mm; the diameter of the bottom of the liquid inlet is 20.39 mm.

More specifically, the liquid outlet 12 has a distal end with an inner diameter of 9.5mm and an outer diameter of 11.1 mm.

As shown in fig. 3, the top positioning sleeve and the bottom positioning sleeve are respectively positioned at the upper end and the lower end of the center of the pump shell 1; the top positioning sleeve and the bottom positioning sleeve have the same structure and are uniform cylinders 3 with blind holes at one end;

the length of the top positioning sleeve and the length of the bottom positioning sleeve are both 7.00mm, and the radius of the top positioning sleeve and the radius of the bottom positioning sleeve are both 1.5 mm; the blind hole depth is 6mm, and the radius of the blind hole 30 is 0.75 mm.

In this embodiment, the blade includes: six uniformly arranged large blades 21 and six uniformly arranged small blades 22; one small blade 22 is arranged between every two adjacent large blades 21;

the large blade 21 and the small blade 22 are both distributed around the positioning rod 20 in a central symmetry manner. The inducer 2 is adhered to the magnet 4 through a special structure; the positioning rod 20 is embedded in the center of the inducer 2.

Specifically, as shown in fig. 4 and 5, one end of the large blade 21 is close to the positioning rod 20, and the other ends are close to the edge of the inducer 2; the large blades 21 are distributed in an arc shape along the radial direction.

Specifically, the upper end of the inducer 2 is a cone-shaped structure divided into six equal parts, blood is equally divided into six parts under the action of the large blades 21 of the inducer 2 after entering the centrifugal pump head through the liquid inlet, and then each divided large blade part is equally divided into two parts by the small blades 22, so that the whole shearing force is reduced to the minimum, and the purpose of high flow can be achieved without high driving rotating speed. The design of the blade structure can maintain a consistent blood flow path, and the blood is uniformly accelerated and discharged immediately after reaching the maximum speed, no blood silting area and no blood recirculation exist, and the risk of thrombus generation by the blood is greatly reduced. Moreover, due to the design of the inducer with openness, the user can pre-fill the air more conveniently, and air bubbles can be discharged very easily. The design of the inducer ensures that no turbulent flow is formed at the liquid inlet and the liquid outlet, thereby achieving the optimal hemodynamics.

In this embodiment, the positioning rod 20 is provided with a limiting sleeve 200; the positioning rod 20 penetrates through the inducer 2 and abuts against the bottom of the inducer 2 through the limiting sleeve 200; the magnet 4 is arranged at the bottom of the inducer 2, so that the locking of the position of the magnet can be ensured, and the magnet is coupled with an external motor and is more fit. .

As shown in fig. 6, the magnet 4 is an injection molded magnet; the magnet has an outer diameter of 27.08mm, an inner diameter of 13.77mm and a thickness of 7 mm.

Specifically, the diameter of the top of the positioning rod 20 is 0.75mm, the diameter of the bottom is 0.75mm, and the length is 47.2 mm.

In the invention, the liquid inlet is designed to be narrow outside and wide inside, and the liquid inlet is designed in a bending way, so that the acceleration of blood cells entering the inside is greatly reduced, the blood flow is softer after flowing in, the hydrodynamic effect is greatly improved, and the blood cell damage is reduced; the angle between the liquid pushing port and the blade is basically 45 degrees, so that the blood can not flow backwards after being pushed out.

The top locating sleeve and the bottom locating sleeve are located at the center of the pump shell and play a role in locating the internal inducer external member, the materials are low-friction durable materials, and long-time use of the centrifugal pump head is guaranteed, and blood cells cannot be deposited at the position.

The whole movable part of the pump head only contacts the positioning rod and the positioning sleeve, so that the heat generated by friction is greatly reduced, and the whole heat generated by the pump head is greatly reduced.

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.