Medical centrifugal pump head

Abstract

The application provides a medical centrifugal pump head, and relates to the technical field of medical devices, which solves the technical problem that vortexes are easily generated in the pump head to form thrombus. The medical centrifugal pump head comprises an upper shell cover, a lower shell cover, a fan blade assembly, a magnetic part, a ball bushing and balls. The ball bushing is installed at the bottom of the inner cavity of the lower shell cover, and a semispherical groove is arranged at the top of the ball bushing. The balls are rotatably arranged in the semispherical groove at the top of the ball bushing. The fan blade assembly is placed in the inner cavity of the lower shell cover and is rotatably connected with the balls. The upper shell cover is covered on the top of the lower shell cover to form a shell and cover the fan blade assembly in the shell. An inlet is arranged at the center of the top of the shell, and an outlet is arranged at the side of the shell. The inlet and the outlet are arranged at an included angle of 90 degrees. The application ensures that there is no vortex from the inlet to the outlet of the centrifugal pump head, avoids the formation of thrombus, accelerates uniformly, and effectively maintains the best blood flow.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a medical centrifugal pump head. Background Technology

[0002] Medical centrifugal pumps are devices used to maintain systemic blood circulation and assist blood flow. They can partially or completely replace the heart's pumping function and have shown good results in clinical treatment of advanced heart failure and in organ transplantation and other surgeries.

[0003] A centrifugal pump consists of a pump casing and an impeller housed within it. Blood enters the casing through the pump inlet, and the high-speed rotation of the impeller drives the blood to form a rotating blood flow. Under centrifugal force, the blood flows out from the pump outlet. The impeller rotates within the pump casing via bearings. During rotation, the high friction at the bearings generates frictional heat, leading to uneven blood flow and hindering optimal blood flow. Furthermore, it can easily create vortices, potentially causing blood clots. Summary of the Invention

[0004] The purpose of this invention is to provide a medical centrifugal pump head to solve the technical problem in the prior art where vortices are easily generated inside the pump head, leading to thrombus formation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This invention provides a medical centrifugal pump head, comprising an upper housing cover, a lower housing cover, a fan assembly, a magnetic component, a ball bearing bushing, and balls, wherein:

[0007] The ball bushing is installed at the bottom of the inner cavity of the lower cover of the outer shell, and a hemispherical groove is provided on the top of the ball bushing;

[0008] The ball bearing is rotatably disposed within the hemispherical groove at the top of the ball bearing bushing;

[0009] The fan blade assembly is placed in the inner cavity of the lower cover of the housing and is rotatably connected to the ball bearing.

[0010] The upper cover of the outer casing covers the top of the lower cover of the outer casing to form an outer casing and enclose the fan blade assembly inside;

[0011] An inlet is provided at the center of the top of the outer casing, and an outlet is provided on the side of the outer casing; the inlet and the outlet are arranged at a 90-degree angle.

[0012] As a further improvement of the present invention, the fan blade assembly includes a fan blade upper cover, a fan blade rotating core, and a fan blade lower cover arranged sequentially. The fan blade upper cover presses on the top of the fan blade rotating core, and the fan blade rotating core covers the top of the fan blade lower cover. The magnetic component is installed between the fan blade rotating core and the fan blade lower cover. The fan blade lower cover is rotatably connected to the outer casing lower cover through the ball bearing.

[0013] As a further improvement of the present invention, the upper cover of the fan blade is a spherical arc surface structure that convexes upward, and the center of the upper cover of the fan blade is provided with a first passage adapted to the inlet; four spiral fan blades are evenly arranged along the circumferential direction on the bottom surface of the lower cover of the fan blade, and the upper cover of the fan blade is fixedly connected to the fan blade core through the spiral fan blades.

[0014] As a further improvement of the present invention, the fan blade core is a flat plate structure with a second hole in the center that matches the first hole. The fan blade core is provided with four spiral slots on the side facing the fan blade cover. Each spiral fan blade has a fixing post at its bottom and a locking hole in each spiral slot. When the bottoms of the four spiral fan blades are locked in the spiral slots, the fixing post engages with the locking hole.

[0015] As a further improvement of the present invention, each of the spiral fan blades is a widened structure that is wider in the middle and narrower at both ends, and the corner of the spiral fan blade facing the center of the fan blade cover is an arc structure, while the corner of the spiral fan blade away from the center of the fan blade cover is a planar structure.

[0016] As a further improvement of the present invention, each of the spiral fan blades has a height-gradient structure, and the height of the spiral fan blades gradually decreases from the inside to the outside.

[0017] As a further improvement of the present invention, the starting end of the spiral fan blade near the center of the fan blade cover is perpendicular to the blade surface of the adjacent spiral fan blade.

[0018] As a further improvement of the present invention, the fan blade lower cover is a cover-shaped structure with a receiving groove. The center of the fan blade lower cover is provided with a third hole that matches the second hole. The center of the third hole is provided with a fixing seat. The fixing seat is connected to the wall of the third hole by three connecting rods. The fixing seat is provided with a hemispherical groove that matches the specifications of the ball bearing on the side facing the lower cover of the outer shell. The receiving groove of the fan blade lower cover is provided with an inner retaining ring and an outer retaining wall. The magnetic component is engaged between the inner retaining ring and the outer retaining wall.

[0019] As a further improvement of the present invention, a limiting post for limiting the magnetic component is provided at the bottom of the fan blade core corresponding to the position of the locking hole, and the bottom of the locking hole extends into the limiting post.

[0020] As a further improvement of the present invention, an outlet pipe is installed on the outlet, the outlet pipe has a transparent section, and a flow monitoring instrument is installed on the outside of the outlet pipe directly opposite the transparent section.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] The medical centrifugal pump head provided by this invention uses magnetic components as the driving force to transport blood, for example, in ECMO surgery, a blood flow device to maintain extracorporeal life support. By adopting a shaftless and bearingless design, the friction is smaller and the frictional heat is lower, ensuring that there are no vortices from the inlet to the outlet of the centrifugal pump head, avoiding the formation of thrombi, accelerating and uniformly, and effectively maintaining optimal blood flow.

[0023] In one optional embodiment of the medical centrifugal pump head provided by the present invention, a housing and a fan assembly rotatably installed within the housing are included. The bottom of the fan assembly has multiple magnetic bodies, and the upper cover of the fan assembly is spherical to ensure balanced distribution of blood during infusion and minimize impact. Four spiral blades are evenly distributed on the reverse side of the upper cover to ensure uniform blood distribution during output. A diameter of [missing information] is located at the center point of the bottom of the lower cover of the fan assembly. The fan has a hemispherical groove, and a ball bushing is located at the center of the lower cover of the outer shell. The top of the ball bushing has a hemispherical groove with a diameter of 3mm. A plastic or copper ball with a diameter of 3mm is placed between the hemispherical groove at the bottom of the fan cover and the upper hemispherical groove of the ball bushing, allowing the fan assembly to rotate axially. The blood inlet is located at the center of the top of the outer shell, and the blood inlet and outlet flow directions are 90°. Through the above structural design, uniform blood delivery and more even distribution are ensured. An outlet pipe is installed at the outlet, and a particularly transparent section is set on the outlet pipe. The flow rate can be easily monitored by aligning the monitoring instrument with the transparent section. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the medical centrifugal pump head of the present invention;

[0026] Figure 2 This is a front view of the medical centrifugal pump head of the present invention;

[0027] Figure 3 This is an exploded structural diagram of the medical centrifugal pump head of the present invention;

[0028] Figure 4 This is an exploded view of the fan blade assembly in the medical centrifugal pump head of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the lower cover of the outer shell of the medical centrifugal pump head of the present invention, viewed from the bottom.

[0030] Figure 6 This is a front perspective view of the lower cover of the outer shell in the medical centrifugal pump head of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of the outer shell cover of the medical centrifugal pump head of the present invention, viewed from the bottom.

[0032] Figure 8 This is a top view of the fan blade cover in the medical centrifugal pump head of the present invention;

[0033] Figure 9 This is a bottom view of the fan blade cover in the medical centrifugal pump head of the present invention;

[0034] Figure 10 This is a top view of the lower cover of the fan blade in the medical centrifugal pump head of the present invention;

[0035] Figure 11 This is a bottom view of the fan blade cover in the medical centrifugal pump head of the present invention;

[0036] Figure 12 This is a bottom view of the impeller rotor in the medical centrifugal pump head of the present invention;

[0037] Figure 13 This is a top view of the impeller core in the medical centrifugal pump head of the present invention;

[0038] Figure 14 This is a top view of the ball bushing in the medical centrifugal pump head of the present invention;

[0039] Figure 15 This is a bottom view of the ball bushing in the medical centrifugal pump head of the present invention.

[0040] In the diagram: 1. Upper cover of outer casing; 2. Lower cover of outer casing; 3. Fan blade assembly; 31. Upper cover of fan blade; 32. Lower cover of fan blade; 33. Fan blade rotor; 34. Spiral fan blade; 35. Spiral groove; 36. Fixing post; 37. Clip hole; 38. Fixing base; 4. Ball bushing; 5. Hemispherical groove; 6. Inlet; 7. Outlet; 8. Outlet pipe. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0042] like Figures 1-3 As shown and Figures 5-7 As shown, the present invention provides a medical centrifugal pump head, including an upper outer cover 1, a lower outer cover 2, a fan assembly 3, a magnetic component, a ball bushing 4, and balls, wherein:

[0043] like Figure 14 and Figure 15 As shown, the ball bushing 4 is installed at the bottom of the inner cavity of the lower cover 2 of the outer shell, and a hemispherical groove 5 is provided on the top of the ball bushing 4;

[0044] The ball bearings are rotated within the hemispherical groove 5 at the top of the ball bearing bushing 4;

[0045] The fan blade assembly 3 is placed in the inner cavity of the lower cover 2 of the outer casing and is connected to the ball bearing for rotation.

[0046] The upper cover 1 covers the top of the lower cover 2 to form a housing and covers the fan blade assembly 3 inside;

[0047] An inlet 6 is located at the center of the top of the outer casing, and an outlet 7 is located on the side of the outer casing; the inlet 6 and the outlet 7 are arranged at a 90-degree angle.

[0048] like Figure 4 As shown, the fan blade assembly 3 includes a fan blade upper cover 31, a fan blade rotating core 33, and a fan blade lower cover 32 arranged sequentially. The fan blade upper cover 31 presses on the top of the fan blade rotating core 33, and the fan blade rotating core 33 covers the top of the fan blade lower cover 32. Magnetic components are installed between the fan blade rotating core 33 and the fan blade lower cover 32. The fan blade lower cover 32 is rotatably connected to the outer casing lower cover 2 via ball bearings.

[0049] like Figure 8 and Figure 9 As shown, the upper cover 31 of the fan blade is a spherical arc structure that bulges upward. The center of the upper cover 31 of the fan blade is provided with a first passage that is compatible with the inlet 6. Four spiral fan blades 34 are evenly arranged on the bottom surface of the lower cover 32 of the fan blade along the circumferential direction. The upper cover 31 of the fan blade is fixedly connected to the fan blade core 33 through the spiral fan blades 34.

[0050] like Figure 12 and Figure 13As shown, the fan blade core 33 is a flat plate structure with a second hole in the center that matches the first hole. The fan blade core 33 has four spiral slots 35 on the side facing the fan blade cover 31. Each spiral fan blade 34 has a fixing post 36 at its bottom and a locking hole 37 in each spiral slot 35. When the bottoms of the four spiral fan blades 34 are locked in the spiral slots 35, the fixing post 36 engages with the locking hole 37.

[0051] Each spiral blade 34 has a widened structure that is wider in the middle and narrower at both ends. The corner of the spiral blade 34 facing the center of the blade cover 31 is an arc structure, while the corner away from the center of the blade cover 31 is a flat structure.

[0052] Each spiral blade 34 has a height-gradient structure, and the height of the spiral blade 34 gradually decreases from the inside to the outside.

[0053] The beginning of the spiral fan blade 34 near the center of the fan blade cover 31 is perpendicular to the blade surface of the adjacent spiral fan blade 34.

[0054] like Figure 10 and Figure 11 As shown, the fan blade lower cover 32 is a cover-shaped structure with a receiving groove. The center of the fan blade lower cover 32 is provided with a third hole that matches the second hole. The center of the third hole is provided with a fixing seat 38. The fixing seat 38 is connected to the wall of the third hole by three connecting rods. The fixing seat 38 is provided with a hemispherical groove 5 that matches the ball bearing specification on the side facing the outer shell lower cover 2. The receiving groove of the fan blade lower cover 32 is provided with an inner retaining ring and an outer retaining wall. The magnetic component is locked between the inner retaining ring and the outer retaining wall.

[0055] The bottom of the fan blade rotor 33 is provided with a limiting post for limiting the magnetic component, corresponding to the position of the locking hole 37, and the bottom of the locking hole 37 extends into the limiting post.

[0056] An outlet 7 pipe is installed on outlet 7, and the outlet 7 pipe has a transparent section. A flow monitoring instrument is installed on the outside of the outlet 7 pipe, directly opposite the transparent section.

[0057] The medical centrifugal pump head provided by this invention uses magnetic components as the driving force to transport blood, for example, in ECMO surgery, a blood flow device to maintain extracorporeal life support. By adopting a shaftless and bearingless design, the friction is smaller and the frictional heat is lower, ensuring that there are no vortices from the inlet to the outlet 7 of the centrifugal pump head, avoiding the formation of thrombi, accelerating and uniformly, and effectively maintaining optimal blood flow.

[0058] In one optional embodiment of the medical centrifugal pump head provided by the present invention, a housing and a fan assembly 3 rotatably installed within the housing are included. The bottom of the fan assembly 3 is provided with multiple magnetic bodies, and the upper cover 31 of the fan assembly 3 is spherical to ensure balanced distribution of blood during infusion and minimize impact force. Four spiral blades are evenly distributed on the reverse side of the upper cover 31 to ensure uniform blood distribution during output. A diameter of [missing information] is located at the center point of the bottom of the lower cover 32. The fan blade assembly 3 has a hemispherical groove 5 and a ball bushing 4 located at the center of the lower cover 2. The ball bushing 4 has a hemispherical groove 5 with a diameter of 3mm on top. A plastic or copper ball with a diameter of 3mm is placed between the hemispherical groove 5 at the bottom of the fan blade lower cover 32 and the upper hemispherical groove 5 of the ball bushing 4, allowing the fan blade assembly 3 to rotate axially. The blood inlet is located at the center of the top of the outer shell, and the blood inlet and blood outlet flow directions are 90°. Through the above structural design, the uniform delivery and more uniform dispersion of blood are ensured. An outlet 7 pipe is installed at the outlet 7, and a particularly transparent section is set on the outlet 7 pipe. The flow rate can be easily monitored by aligning the monitoring instrument with the transparent section.

[0059] A transparent tube, a smooth, transparent monitoring probe.

[0060] First, it should be noted that "inward" refers to the direction towards the center of the storage space, while "outward" refers to the direction away from the center of the storage space.

[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the appendix. Figure 1 The orientations or positional relationships shown are for the purpose of facilitating and simplifying the description of the present invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A medical centrifugal pump head, characterized in that It comprises an upper housing cover, a lower housing cover, a fan blade assembly, a magnetic part, a ball bushing and balls. The ball bushing is installed at the bottom of the inner cavity of the lower housing cover, and a semispherical groove is arranged at the top of the ball bushing. The balls are rotatably arranged in the semispherical groove at the top of the ball bushing. The fan blade assembly is placed in the inner cavity of the lower housing cover and is rotatably connected with the balls. The upper housing cover is covered on the top of the lower housing cover to form a housing and cover the fan blade assembly. An inlet is arranged at the center of the top of the housing, and an outlet is arranged at the side of the housing. The inlet and the outlet are arranged at an angle of 90 degrees. The fan blade assembly comprises a fan blade upper cover, a fan blade rotating core and a fan blade lower cover arranged in sequence. The fan blade upper cover is a spherical arc structure protruding upward, and a first hole is arranged at the center of the fan blade upper cover.

2. The medical centrifugal pump head of claim 1, wherein Each of the spiral fan blades is a widened structure with a wide middle and thin ends.

3. The medical centrifugal pump head of claim 1, wherein The fan blade rotating core is a flat plate structure with a second hole arranged at the center.

4. The medical centrifugal pump head of claim 1, wherein Each of the spiral fan blades is a height gradient structure, and the height of the spiral fan blade gradually decreases from inside to outside.

5. The medical centrifugal pump head of claim 2, wherein The initial end of the spiral fan blade close to the center of the fan blade upper cover is perpendicular to the blade surface of the adjacent spiral fan blade.

6. A medical centrifugal pump head according to claim 5, characterized in that The fan blade lower cover is a cover structure with a receiving groove.

7. The medical centrifugal pump head according to claim 1, characterized in that The bottom of the fan blade rotating core is provided with a limiting column for limiting the magnetic part. The bottom of the ball hole extends into the limiting column. An outlet pipe is installed on the outlet, and the outlet pipe has a transparent section. A flow monitoring instrument is installed on the outside of the outlet pipe opposite the transparent section.

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