Medical centrifugal pump

Abstract

The utility model provides a medical centrifugal pump. The medical centrifugal pump comprises a pump head, a pipeline connector, a quick-screwing connector and a threaded part. The pipeline connector is arranged on the pump head and used for being sleeved with a connecting pipe. The thread part is arranged in the circumferential direction of the pipeline connector; the quick-screwing connector is in threaded fit with the threaded part; a first extrusion wall is arranged on the inner circumference of the quick-screwing connector; a first extrusion wall inclined in the axial direction is arranged on the periphery of the pipeline connector, a second extrusion wall inclined in the axial direction is arranged on the periphery of the pipeline connector, and the quick-screwing connector rotates relative to the thread part to move relative to the axial direction of the pipeline connector so as to be used for extruding and locking the connecting pipe or unlocking the connecting pipe through the first extrusion wall and the second extrusion wall. According to the configuration, on one hand, locking or unlocking can be achieved by rotating the quick-screwing connector, the implementation mode is simple and convenient, and the fastening step is effectively simplified; and on the other hand, threaded fastening forms progressive fastening, the fastening force is gradually increased, and the possibility of damage to the connecting pipe is reduced or avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a medical centrifugal pump. Background Art

[0002] A medical centrifugal pump is a commonly used device in the medical field and is often used to pump fluids such as blood and liquid medicine. In the medical field, considering hygiene and safety, the connecting tube of the medical centrifugal pump is often configured as a disposable consumable, and the connecting tube needs to be connected to the pump head of the medical centrifugal pump before each use.

[0003] The existing connecting tubes generally have a certain elasticity and can be connected by sleeving on the pipeline connector of the medical centrifugal pump. However, such a connection method has a certain risk of side leakage. If a tie strap is used for fastening, on the one hand, the fastening steps of the tie strap are relatively complex and take up limited surgical time. On the other hand, if the tie strap is connected too tightly, it is easy to break or damage the connecting tube, and if it is too loose, side leakage is still likely to occur. Therefore, the tightness of the tie strap needs to be grasped depending on the operator's experience, and the reliability is low. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a medical centrifugal pump to solve the problems of low connection reliability or complex connection between the existing medical centrifugal pump and the connecting tube.

[0005] To solve the above technical problems, the utility model provides a medical centrifugal pump, which includes a pump head, a pipeline connector, a quick-connect fitting, and a threaded portion;

[0006] The pipeline connector is arranged on the pump head for a connecting tube to be sleeved; the threaded portion is arranged circumferentially around the pipeline connector; the quick-connect fitting is threadedly adapted to the threaded portion;

[0007] The inner circumference of the quick-connect fitting has a first pressing wall; the outer circumference of the pipeline connector has a second pressing wall inclined axially. The quick-connect fitting moves axially relative to the pipeline connector by rotating relative to the threaded portion, so as to press and lock or unlock the connecting tube through the first pressing wall and the second pressing wall.

[0008] Optionally, the first pressing wall is inclined axially along the pipeline connector, and the inclination angle of the first pressing wall is less than or equal to the inclination angle of the second pressing wall.

[0009] Optionally, the threaded portion is fixedly arranged relative to the pipeline connector, and the quick-connect fitting is detachably threadedly connected to the threaded portion.

[0010] Optionally, the second pressing wall is formed on at least one tapered stepped section or at least one drum-shaped section.

[0011] Optionally, the outer periphery of the quick-connect fitting has a plurality of anti-slip structures; the anti-slip structures include at least one of anti-slip ridges, anti-slip grooves, anti-slip protrusions, and anti-slip pits.

[0012] Optionally, the threaded portion has an external thread, and the quick-connect fitting has an internal thread adapted to the external thread.

[0013] Optionally, the first pressing wall is located at one end of the quick-connect fitting in the axial direction, and the internal thread is located at the other end of the quick-connect fitting in the axial direction.

[0014] Optionally, the first pressing wall and / or the second pressing wall incline inwards away from the pump head.

[0015] Optionally, there are two pipeline connectors, two quick-connect fittings and two threaded portions, and each pipeline connector corresponds to one quick-connect fitting and one threaded portion.

[0016] Optionally, the first pressing wall and / or the second pressing wall extend continuously in a circumferential ring shape.

[0017] In summary, the medical centrifugal pump provided by the present utility model includes a pump head, a pipeline connector, a quick-connect fitting, and a threaded portion; the pipeline connector is arranged on the pump head for a connecting pipe to be sleeved; the threaded portion is arranged circumferentially around the pipeline connector; the quick-connect fitting is in threaded fit with the threaded portion; the inner periphery of the quick-connect fitting has a first pressing wall; the outer periphery of the pipeline connector has a second pressing wall inclined axially, and the quick-connect fitting moves axially relative to the pipeline connector by rotating relative to the threaded portion, so as to squeeze and lock or unlock the connecting pipe through the first pressing wall and the second pressing wall.

[0018] With such a configuration, based on the threaded fit between the quick-connect fitting and the threaded portion, the two can form relative axial movement, so as to squeeze and lock or unlock the connecting pipe through the first pressing wall and the second pressing wall. On the one hand, locking or unlocking can be achieved by rotating the quick-connect fitting, and the implementation method is simple, effectively simplifying the fastening steps. On the other hand, since the second pressing wall is inclined axially, the threaded fastening forms a progressive fastening, and the fastening force gradually increases, reducing or avoiding the possibility of damaging the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Those of ordinary skill in the art will understand that the provided drawings are used to better understand the present utility model and do not constitute any limitation to the scope of the present utility model.

[0020] Figure 1 is an exploded schematic view of the medical centrifugal pump according to an embodiment of the present utility model.

[0021] Figure 2 It is an axial sectional view of a pipeline connector, a quick-connect fitting, and a threaded portion according to an embodiment of the present utility model.

[0022] Figure 3 It is a schematic view of a quick-connect fitting according to an embodiment of the present utility model.

[0023] Figure 4 It is a schematic view of a pump head and a threaded portion according to an embodiment of the present utility model.

[0024] Figure 5 It is a schematic view of a pipeline connector according to another embodiment of the present utility model.

[0025] In the drawings: 1 - pump head; 2 - pipeline connector; 21 - second extrusion wall; 22 - tapered stepped section; 23 - drum-shaped section; 3 - quick-connect fitting; 30 - internal thread; 31 - first extrusion wall; 32 - anti-slip structure; 4 - threaded portion; 40 - external thread; 5 - connecting pipe; Detailed implementation manners

[0026] To make the objectives, advantages, and features of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are all in a very simplified form and not drawn to scale, and are only used to conveniently and clearly assist in explaining the objectives of the embodiments of the present utility model. In addition, the structures shown in the accompanying drawings are often part of the actual structures. In particular, the accompanying drawings need to show different focuses and sometimes use different scales.

[0027] As used in the present utility model, the singular forms "a", "an", "one" and "the" include plural referents. The term "or" is generally used in the sense of including "and / or". The term "several" is generally used in the sense of including "at least one". The term "at least two" is generally used in the sense of including "two or more". In addition, the terms "first", "second", "third" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second", "third" may explicitly or implicitly include one or at least two of such features. "One end" and "the other end", as well as "proximal end" and "distal end" generally refer to corresponding two parts, which include not only the endpoints. In addition, as used in the present utility model, "mounted", "connected", "coupled", a component "disposed" on another component should be understood in a broad sense, generally only indicating that there is a connection, coupling, cooperation or transmission relationship between the two components, and the two components may be directly or indirectly connected, coupled, cooperated or transmitted through an intermediate component, rather than being construed as indicating or implying the spatial position relationship between the two components, that is, a component may be in any orientation such as inside, outside, above, below or on one side of another component, unless otherwise explicitly stated in the context. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model may be understood according to specific circumstances. In addition, directional terms such as above, below, up, down, upward, downward, left, right, etc. are used relative to the exemplary embodiments as shown in the figures. The upward or upper direction is towards the top of the corresponding figure, and the downward or lower direction is towards the bottom of the corresponding figure.

[0028] The purpose of the present utility model is to provide a medical centrifugal pump to solve the problems of low connection reliability or complex connection between the existing medical centrifugal pump and the connecting pipe. The following is a description with reference to the accompanying drawings.

[0029] Please refer to Figures 1 to 5, an embodiment of the present utility model provides a medical centrifugal pump, which includes a pump head 1, a pipeline connector 2, a quick-connect fitting 3, and a threaded portion 4. The medical centrifugal pump provided in this embodiment, for example but not limited to, is a magnetic levitation centrifugal pump, and its application scenarios, for example but not limited to, are extracorporeal circulation assistance, infusion or aspiration of medicinal liquids, body fluids, etc. This embodiment does not limit this. In one example, the pump head 1 is detachably assembled with a pump machine (not shown). The pump head 1 can be selected as a disposable consumable, which has a pump cavity inside and is equipped with a magnetic floating rotor, etc. Its structure and principle can refer to the prior art, and this embodiment will not elaborate on this. The pipeline connector 2 is arranged on the pump head 1 for a connecting pipe 5 to be sleeved; if there are two pipeline connectors 2, one is an inflow pipe connector and the other is an outflow pipe connector, both of which are communicated with the pump cavity of the pump head 1. Based on the principle of the centrifugal pump, the inflow pipe connector is generally arranged along the axis of the pump head 1 (that is, the rotating shaft of the magnetic floating rotor), and the outflow pipe connector is generally arranged tangentially to the pump head 1. Of course, this embodiment does not limit this. In some application scenarios, the pipeline connector 2 can also form a certain angle with the pump head 1, or have a certain curvature, etc. Those skilled in the art can set it according to the specific application scenario.

[0030] Before application, the pipeline connector 2 needs to be connected to the connecting pipe 5. The connecting pipe 5 is generally a flexible hose with a certain elasticity. The inner diameter of the connecting pipe 5 can be slightly smaller than the outer diameter of the pipeline connector 2 (referring to the maximum outer diameter or average outer diameter). When the connecting pipe 5 is sleeved on the pipeline connector 2, it needs to form a certain expansion to improve the sealing performance.

[0031] Please refer to Figure 2 , the threaded portion 4 is arranged circumferentially around the pipeline connector 2; the quick-connect fitting 3 is threadedly adapted to the threaded portion 4; the inner circumference of the quick-connect fitting 3 has a first pressing wall 31; the outer circumference of the pipeline connector 2 has a second pressing wall 21 inclined axially. The quick-connect fitting 3 moves axially relative to the pipeline connector 2 by rotating relative to the threaded portion 4, so as to lock or unlock the connecting pipe 5 by pressing with the first pressing wall 21 and the second pressing wall 31.

[0032] The quick-connect fitting 3 is threadedly adapted to the threaded portion 4. It can be understood that when the quick-connect fitting 3 rotates relative to the threaded portion 4, based on the threaded adaptation relationship between the two, the quick-connect fitting 3 will form an axial movement relative to the threaded portion 4. When the axial position of the threaded portion 4 and the pipeline connector 2 remains relatively unchanged, the quick-connect fitting 3 will form an axial movement relative to the pipeline connector 2. Since the second pressing wall 21 is inclined axially, when the first pressing wall 31 moves axially with the quick-connect fitting 3, the radial distance between the first pressing wall 31 and the second pressing wall 21 will change.

[0033] Optionally, the first extrusion wall 31 and / or the second extrusion wall 21 extend continuously in a circumferential ring shape. Taking Figure 2 as an example, the second extrusion wall 21 is inclined inward along the axial direction towards the opening end, that is, Figure 2 it is inclined inward in the upper-middle direction to form a tapered contraction shape.

[0034] When the quick-connect fitting 3 is rotated forward to move it Figure 2 downward in the lower-middle direction, the radial distance between the first extrusion wall 31 and the second extrusion wall 21 decreases, thereby squeezing the connecting pipe 5 clamped between the first extrusion wall 31 and the second extrusion wall 21. As the quick-connect fitting 3 is gradually tightened and moved downward, the connecting pipe 5 and the second extrusion wall 21 are squeezed and locked to form a reliable seal. On the contrary, when the quick-connect fitting 3 is rotated in the reverse direction to move it Figure 2 upward in the upper-middle direction, the radial distance between the first extrusion wall 31 and the second extrusion wall 21 increases, and the connecting pipe 5 is released and unlocked, and it can be pulled out.

[0035] Please continue to refer to Figure 2 , optionally, the first extrusion wall 31 is inclined along the axial direction of the pipeline connector 2, and the inclination angle of the first extrusion wall 31 is less than or equal to the inclination angle of the second extrusion wall 21. Since the second extrusion wall 21 is inclined along the axial direction, when the connecting pipe 5 is sleeved on the pipeline connector 2, it will deform based on elasticity, and the pipe wall of the connecting pipe 5 will also form a certain inclination. And the first extrusion wall 31 is inclined along the axial direction of the pipeline connector 2, which can increase the contact area between the first extrusion wall 31 and the pipe wall of the connecting pipe 5, and reduce the relative contact pressure between the two. On the one hand, it can make the first extrusion wall 31 better fit on the pipe wall of the connecting pipe 5 and can squeeze the connecting pipe 5 more thoroughly; on the other hand, due to the increased contact area, the possibility of damaging the connecting pipe 5 is relatively reduced. The inclination angle of the first extrusion wall 31 refers to the included angle formed by it and the axis of the pipeline connector 2. Similarly, the inclination angle of the second extrusion wall 21 also refers to the included angle formed by it and the axis of the pipeline connector 2. The inclination angle of the first extrusion wall 31 being less than or equal to the inclination angle of the second extrusion wall 21 can prevent the first extrusion wall 31 from forming a point contact or line contact extrusion on the connecting pipe 5 when the quick-connect fitting 3 is axially tightened and moved downward, reducing the possibility of damage to the connecting pipe 5.

[0036] Optionally, the threaded portion 4 is fixedly arranged relative to the pipe connector 2, and the quick-release connector 3 is detachably threadedly connected to the threaded portion 4. For ease of operation, the threaded portion 4 can be configured to be relatively fixed to the pipe connector 2. Preferably, the threaded portion 4 is fixed at an end of the pipe connector 2 that is relatively far away from the opening, that is, the threaded portion 4 is preferably fixed to the base of the pipe connector 2. In this way, the open end of the pipe connector 2 is exposed, which is convenient for the sleeve installation of the connecting pipe 5. In other embodiments, the threaded portion 4 is not necessarily restricted to be fixed to the pipe connector 2, and it can also be circumferentially movably sleeved outside the pipe connector 2, but the axial position of the threaded portion 4 and the pipe connector 2 should be limited. During operation, it can be grasped by holding or grabbing with a tool, as long as the threaded portion 4 and the quick-release connector 3 can form relative rotation.

[0037] Optionally, the second extrusion wall 21 is formed on at least one pagoda-shaped step section 22 or at least one drum-shaped section 23. Figure 2 In one embodiment, the pipe connector 2 includes three pagoda-shaped stepped sections 22, which are arranged in sequence along the axial direction of the pipe connector 2. The outer periphery of any pagoda-shaped stepped section 22 can be regarded as the second extrusion wall 21. Figure 5 In another embodiment, the pipe connector 2 includes a drum-shaped section 23, and the semicircular arc-shaped outer wall of the drum-shaped section 23 close to the outlet end of the pipe connector 2 can be regarded as the second extrusion wall 21. It should be noted that Figure 2 and Figure 5 The pagoda-shaped step section 22 or drum-shaped section 23 is merely shown as an example, and is not intended to be limiting of the pagoda-shaped step section 22 or drum-shaped section 23. The number of the pagoda-shaped step section 22 or drum-shaped section 23 is not limited to the number of the pagoda-shaped step section 22 or drum-shaped section 23. Figure 2 and Figure 5 As shown, they can be one, two or more.

[0038] Optional, please refer to Figure 3 The outer periphery of the quick-tightening joint 3 has a plurality of anti-skid structures 32; the anti-skid structures 32 include anti-skid edges (such as Figure 3 The anti-skid structure 32 is provided to facilitate the operator to hold the device, increase the gripping friction, and facilitate the application of force.

[0039] In an alternative exemplary embodiment, the threaded portion 4 has an external thread 40, and the quick-connect fitting 3 has an internal thread 30 adapted to the external thread. Considering the simplified structure, the threaded portion 4 preferably has an external thread 40, while the quick-connect fitting 3 has an internal thread 30. In this way, the whole quick-connect fitting 3 can be generally configured as a hollow annular body. The threaded portion 4 only needs to be provided protruding along the outer periphery of the pipeline connector 2, which is convenient for processing and manufacturing. Of course, this embodiment does not limit this. In some other embodiments, the threaded portion 4 can also have an internal thread, while the quick-connect fitting 3 has a matching external thread. At this time, the threaded portion 4 needs to be arranged around the pipeline connector 2 at intervals and form a connection with the pipeline connector 2 through a certain connection and fixing structure, which relatively increases the difficulty of processing and manufacturing and increases the overall volume of the mechanism.

[0040] Furthermore, the first extrusion wall 31 is located at one end of the quick-connect fitting 3 in the axial direction, and the internal thread 30 is located at the other end of the quick-connect fitting 3 in the axial direction. Based on the solution that the quick-connect fitting 3 has an internal thread 30, the whole quick-connect fitting 3 is in the shape of a hollow annular body, which penetrates along its own axis to facilitate the connection pipe 5 to pass through. The internal thread 30 is preferably arranged at the end facing the pump head 1, while the first extrusion wall 31 is located at the end relatively far from the pump head 1.

[0041] Preferably, the first extrusion wall 31 and / or the second extrusion wall 21 are inclined inwards in the direction away from the pump head 1. With such a configuration, the whole pipeline connector 2 is in a contracted shape towards the open end, which is convenient for the connection pipe 5 to be gradually enlarged and sleeved. It can be understood that in some other embodiments, the first extrusion wall 31 or the second extrusion wall 21 can also be inclined inwards in the direction towards the pump head 1. In this way, the formed pipeline connector 2 is in an expanded shape towards the open end. Although such an arrangement increases the difficulty of sleeving the connection pipe 5, the flared pipeline connector 2 will also form a certain anti-disconnection resistance to the connected connection pipe 5, further reducing the possibility of the connection pipe 5 falling off and separating.

[0042] Optionally, there are two pipeline connectors 2, two quick-connect fittings 3 and two threaded portions 4. Each pipeline connector 2 corresponds to one quick-connect fitting 3 and one threaded portion 4. In some embodiments, the quick-connect fitting 3 and the threaded portion 4 can be provided corresponding to either the inflow pipe connector or the outflow pipe connector. Preferably, a set of quick-connect fitting 3 and threaded portion 4 can be respectively provided at both the inflow pipe connector and the outflow pipe connector at the same time.

[0043] In summary, the medical centrifugal pump provided by the present utility model includes a pump head, a pipeline connector, a quick-connect fitting, and a threaded portion; the pipeline connector is disposed on the pump head for a connecting pipe to be sleeved thereon; the threaded portion is circumferentially arranged around the pipeline connector; the quick-connect fitting is threadedly adapted to the threaded portion; the inner circumference of the quick-connect fitting has a first pressing wall; the outer circumference of the pipeline connector has a second pressing wall inclined axially, and the quick-connect fitting moves axially relative to the pipeline connector by rotating relative to the threaded portion, so as to press and lock or unlock the connecting pipe through the first pressing wall and the second pressing wall. With such a configuration, based on the threaded adaptation between the quick-connect fitting and the threaded portion, the two can form relative axial movement, thereby pressing and locking or unlocking the connecting pipe through the first pressing wall and the second pressing wall. On the one hand, locking or unlocking can be achieved by rotating the quick-connect fitting, and the implementation method is simple, effectively simplifying the fastening steps. On the other hand, since the second pressing wall is inclined axially, the threaded fastening forms a progressive fastening, and the fastening force gradually increases, reducing or avoiding the possibility of damage to the connecting pipe.

[0044] It should be noted that the above-mentioned several embodiments can be combined with each other. The above description is only a description of the preferred embodiments of the present utility model, and does not limit the scope of the present utility model in any way. Any changes and modifications made by those of ordinary skill in the field of the present utility model according to the above disclosure shall fall within the protection scope of the present utility model.

Claims

1. A medical centrifugal pump, characterized in that, It includes a pump head, a pipeline connector, a quick-connect fitting, and a threaded portion; The pipeline connector is arranged on the pump head for a connecting pipe to be sleeved thereon; the threaded portion is arranged circumferentially around the pipeline connector; the quick-connect fitting is threadedly adapted to the threaded portion; The inner circumference of the quick-connect fitting has a first pressing wall; the outer circumference of the pipeline connector has a second pressing wall inclined axially, and the quick-connect fitting moves axially relative to the pipeline connector by rotating relative to the threaded portion, so as to press and lock or unlock the connecting pipe through the first pressing wall and the second pressing wall.

2. The medical centrifugal pump according to claim 1, wherein, The first pressing wall is inclined axially along the pipeline connector, and the inclination angle of the first pressing wall is less than or equal to the inclination angle of the second pressing wall.

3. The medical centrifugal pump according to claim 1, wherein The threaded portion is fixedly arranged relative to the pipeline connector, and the quick-connect fitting is detachably threadedly connected to the threaded portion.

4. The medical centrifugal pump according to claim 1, characterized in that, The second pressing wall is formed on at least one pagoda-shaped stepped section or at least one drum-shaped section.

5. The medical centrifugal pump according to claim 1, characterized in that, The outer circumference of the quick-connect fitting has a plurality of anti-slip structures; the anti-slip structures include at least one of anti-slip ridges, anti-slip grooves, anti-slip protrusions, and anti-slip pits.

6. The medical centrifugal pump according to claim 1, characterized in that, The threaded portion has an external thread, and the quick-connect fitting has an internal thread adapted to the external thread.

7. The medical centrifugal pump according to claim 6, characterized in that, The first pressing wall is located at one end of the quick-connect fitting in the axial direction, and the internal thread is located at the other end of the quick-connect fitting in the axial direction.

8. The medical centrifugal pump according to claim 1, wherein The first pressing wall and / or the second pressing wall incline inwards in a direction away from the pump head.

9. The medical centrifugal pump according to claim 1, characterized in that, There are two pipeline connectors, two quick-connect fittings and two threaded portions, and each pipeline connector corresponds to one quick-connect fitting and one threaded portion.

10. The medical centrifugal pump according to claim 1, characterized in that, The first pressing wall and / or the second pressing wall extend continuously in a circumferential ring shape.

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