CN214077270U

CN214077270U - Selectively rotatable moving valve

Info

Publication number: CN214077270U
Application number: CN202023021165.7U
Authority: CN
Inventors: 时瑞; 曾达; 刘家祺; 林韵
Original assignee: Shanghai Dabo Medical Technology Co ltd
Current assignee: Shanghai Dabo Medical Technology Co ltd
Priority date: 2020-12-15
Filing date: 2020-12-15
Publication date: 2021-08-31
Anticipated expiration: 2030-12-15

Abstract

The utility model discloses a rotatable moving valve of alternative belongs to whole blood separator technical field. The utility model discloses a valve gap and centrifugal valve body, centrifugal chamber has in the centrifugal valve body to be used for holding plasma and separates into from outside-in red blood cell layer under the centrifugation rotates, platelet rich plasma layer, platelet poor plasma layer, be equipped with first passageway and second passageway on the centrifugal valve body, wherein first passageway links to each other with red blood cell layer, the second passageway links to each other with platelet poor plasma layer, valve gap and the cooperation of centrifugal valve body, the valve gap rotates with the centrifugal valve is synchronous centrifugation, and simultaneously, the valve gap is for centrifugal valve body along rotation axis axial translation, be equipped with first valve port and second valve port on the valve gap, thereby the position of the first valve port of axial displacement control of valve gap and second valve port controls red blood cell and discharges from first passageway or platelet poor plasma from the second passageway.

Description

Selectively rotatable moving valve

Technical Field

The utility model discloses a rotatable removal valve of alternative belongs to whole blood separator technical field according to international patent classification table (IPC) division.

Background

The traditional blood centrifugation generally adopts the assembly combination of a centrifuge and a centrifuge tube to realize the blood centrifugation layering into Red Blood Cells (RBC), Platelet Rich Plasma (PRP) and Platelet Poor Plasma (PPP), the centrifuge mode adopts the mode that the centrifuge rotation axial direction forms an angle with the centrifuge tube axial direction during centrifugation, RBC, PRP and PPP extend from the bottom to the top along the centrifuge tube axial direction after centrifugation, RBC deposits at the bottommost part of the centrifuge tube, PRP is in the middle layer, and PPP is in the uppermost layer. After centrifugation, the layers can be sequentially removed by using a syringe or a pipette, but the centrifuge required by the centrifugation method is usually large in volume and complex in liquid removal operation.

At present, in a blood centrifugation technology, the centrifugal layering of blood is realized by adopting a mode that the rotation axial direction of a centrifuge coincides with the axial direction of a centrifuge tube during centrifugation, the RBC, the PRP and the PPP extend from outside to inside along the radial direction of the centrifuge tube, the RBC is positioned at the outermost layer of the centrifuge tube, the PRP is positioned at the middle layer and the PPP is positioned at the innermost layer.

Disclosure of Invention

To prior art not enough, the utility model provides a but selective rotation's removal valve, it can supply the operator to rotate in order selectively to open each passageway when keeping centrifugal force, and then takes out the plasma of layering.

In order to achieve the purpose, the utility model is realized by the following technical proposal:

a movable valve capable of selectively rotating comprises a valve cover and a centrifugal valve body, wherein a centrifugal cavity is formed in the centrifugal valve body and used for containing plasma and separating the plasma into an outward red blood cell layer, a platelet-rich plasma layer and a platelet-poor plasma layer under centrifugal rotation, a first channel and a second channel are formed in the centrifugal valve body, the first channel is connected with the red blood cell layer, the second channel is connected with the platelet-poor plasma layer, the valve cover is matched with the centrifugal valve body, the valve cover and the centrifugal valve body rotate synchronously in a centrifugal mode, meanwhile, the valve cover moves axially relative to the centrifugal valve body along a rotating shaft, a first valve port and a second valve port are formed in the valve cover, and the axial movement of the valve cover controls the positions of the first valve port and the second valve port so that red blood cells are discharged from the first channel or the platelet-poor plasma is.

Further, a roller is arranged outside the centrifugal valve body and the valve cover, the centrifugal valve body is provided with a large end and a small end, the large end and the small end of the centrifugal valve body rotate in the roller through a bearing, the center of the large end of the centrifugal valve body is connected with a rotating shaft, and the rotating shaft penetrates through the valve cover and extends out of the roller.

Furthermore, a driven piece is arranged in the roller, the driven piece is sleeved on the rotating shaft and is fixed in the circumferential direction, a cam is arranged on the inner wall of the roller on one side of the driven piece, the other side of the driven piece acts on the valve cover, and a bias spring is arranged between the valve cover and the centrifugal valve body.

Further, the cam and the roller form an integrated structure, the cam comprises a first cam, a second cam and a third cam, and the first cam, the second cam or the third cam selectively acts with the follower by rotating the roller by an operator, so that the follower is axially moved, and the valve cover is axially moved to control the positions of the first valve port and the second valve port.

Further, the free ends of the first cam and the third cam are respectively provided with a stopper to prevent the drum from being excessively rotated.

Furthermore, a wedge-shaped boss is arranged in a centrifugal cavity of the centrifugal valve body, and a discharge channel of the red blood cells is formed between the outer side of the boss and the wall of the centrifugal cavity.

Further, the position of the first valve port of the valve cover is lower than the position of the second valve port.

When the first cam is engaged with the driven piece, the valve cover is at the first axial position, the first valve port is closed, and the second valve port is closed;

when the roller is rotated to enable the second cam to be connected with the driven piece, the driven piece moves upwards along the axial direction, the valve cover is pushed by the driven piece in the axial direction to translate to a second axial position in the axial direction, the first valve port is opened, the second valve port is closed, and the red blood cells are discharged from the first channel;

when the roller is rotated to enable the third cam to be connected with the driven piece, the driven piece and the valve cover move downwards along the axial direction under the action of the bias spring, the valve cover is moved to the third axial position in the axial direction, the first valve port is closed, the second valve port is opened, and platelet poor plasma is discharged from the second channel.

The utility model discloses a rotatory removal valve of alternative, it can supply the operator to rotate in order selectively to open each passageway when keeping centrifugal force, and then the accuracy takes out along each layering of the radial outside to the interior extension of centrifuging tube, and the sample is simple, accurate.

Drawings

Fig. 1 is a side view of an embodiment of the present invention.

Fig. 2 is a schematic structural view of a roller and a cam according to an embodiment of the present invention.

Fig. 3 is a side view of the cam of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

example (b): referring to fig. 1 to 3, a selectively rotatable moving valve includes a valve cap 1 and a centrifugal valve body 2, a centrifugal chamber 20 is disposed in the centrifugal valve body 2 for accommodating plasma and separating the plasma into an outward Red Blood Cell (RBC) layer a1, a Platelet Rich Plasma (PRP) layer a2, and a Platelet Poor Plasma (PPP) layer A3 under centrifugal rotation, a first channel 21 and a second channel 22 are disposed on the centrifugal valve body 2, wherein the first channel is connected with the erythrocyte layer, the second channel is connected with the platelet poor plasma layer, the valve cover 1 is matched with the centrifugal valve body 2, the valve cover 1 and the centrifugal valve body 2 synchronously rotate centrifugally, meanwhile, the valve cover 1 axially translates along the rotating shaft relative to the centrifugal valve body 2, the valve cover 1 is provided with a first valve port 11 and a second valve port 12, and the axial movement of the valve cover 1 controls the positions of the first valve port and the second valve port so as to control the discharge of red blood cells from the first channel or platelet poor plasma from the second channel. The centrifugal valve body 2 and the valve cover 1 are externally provided with a roller 3, the centrifugal valve body 2 is provided with a big end and a small end, the big end and the small end of the centrifugal valve body rotate in the roller through

bearings

41 and 42, the center of the big end of the centrifugal valve body 2 is connected with a rotating shaft, and the rotating shaft penetrates through the valve cover and extends out of the roller. The inside of the roller 3 is provided with a driven part 5, the driven part 5 is sleeved on the rotating shaft and is circumferentially fixed, the inner wall of the roller at one side of the driven part 5 is provided with a cam 6, the cams are symmetrically arranged in the roller, the other side of the driven part acts on the valve cover, and a bias spring 7 is arranged between the valve cover and the centrifugal valve body. The cam and the roller form an integral structure, the cam 6 comprises a first cam 61, a second cam 62 and a third cam 63, and the first cam, the second cam or the third cam and the follower are selectively acted by the first cam, the second cam or the third cam and the follower through the rotation of the roller by an operator, so that the follower 5 is axially moved, and the valve cover 1 is axially moved to control the positions of the first valve port and the second valve port. The free ends of the first cam and the third cam are respectively provided with a stopper 60 to prevent the drum from being excessively rotated. A first collector 81 and a second collector 82 are arranged outside the first valve port 11 and the second valve port 12, and the position of the first valve port of the valve cover is lower than that of the second valve port. A wedge-shaped boss 9 is arranged in a centrifugal cavity 20 of the centrifugal valve body, and a discharge channel of the red blood cells is formed between the outer side of the boss and the wall of the centrifugal cavity. The top, i.e. the small end, of the centrifugal valve body is provided with an inlet for injecting whole blood, and a sealing membrane 23 is arranged at the inlet.

The utility model relates to a rotatory removal valve of alternative, it can supply the operator to rotate in order selectively to open each passageway when keeping centrifugal force, and then the accuracy takes out along each layering of the radial outside to the interior extension of centrifuging tube.

During high speed rotation of the chamber, blood fills the chamber and separates into RBCs, PRPs, and PPP over a period of time. The centrifugal valve body 2 rotates in the drum by means of two ball bearings arranged at the smaller end and the larger end of the chamber, respectively. The bonnet 1 is driven via a key or pin and rotates with the centrifugal valve body 2 and can be pushed axially by the follower 5 to translate axially along the axis of rotation, while the follower is selectively moved axially by the cam. Axial movement of the valve cover 1 controls the position of the first port and the second port to control the discharge of RBC from the first passage or PPP from the second passage. The cam 6 and the roller 3 form an integral structure, the driven piece can axially move in the roller under the action of the cam 5, but a convex key on the driven piece and a concave key on the motor bin can prevent the driven piece from rotating.

When the first cam is engaged with the driven piece, the valve cover is at a first axial position, the first valve port is closed, and the second valve port is closed;

when the roller is rotated to enable the second cam to be engaged with the driven piece, the driven piece moves upwards along the axial direction, the valve cover is pushed by the driven piece in the axial direction to translate to a second axial position in the axial direction, the first valve port is opened, the second valve port is closed, and the RBC is discharged from the first channel;

when the roller is rotated to engage the third cam with the follower, the follower and the valve cover are moved axially downward by the biasing spring, the valve cover is moved axially to a third axial position, the first valve port is closed, the second valve port is opened, and PPP is discharged from the second passage.

The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.

Claims

1. A selectively rotatable travel valve, comprising: the centrifugal valve body is internally provided with a centrifugal cavity for accommodating plasma and separating the plasma into an outward red blood cell layer, a platelet-rich plasma layer and a platelet-poor plasma layer under centrifugal rotation, the centrifugal valve body is provided with a first channel and a second channel, the first channel is connected with the red blood cell layer, the second channel is connected with the platelet-poor plasma layer, the valve cover is matched with the centrifugal valve body, the valve cover and the centrifugal valve body synchronously rotate in a centrifugal mode, meanwhile, the valve cover axially translates relative to the centrifugal valve body along a rotating shaft, the valve cover is provided with a first valve port and a second valve port, and the axial movement of the valve cover controls the positions of the first valve port and the second valve port so as to control red blood cells to be discharged from the first channel or the platelet-poor plasma to be discharged from the second channel.

2. A selectively rotatable moving valve according to claim 1, wherein: the centrifugal valve body and the valve cover are externally provided with a roller, the centrifugal valve body is provided with a large end and a small end, the large end and the small end of the centrifugal valve body rotate in the roller through bearings, the center of the large end of the centrifugal valve body is connected with a rotating shaft, and the rotating shaft penetrates through the valve cover and extends out of the roller.

3. A selectively rotatable moving valve according to claim 2, wherein: the inside of the roller is provided with a driven piece which is sleeved on the rotating shaft and fixed by the circumference, the inner wall of the roller at one side of the driven piece is provided with a cam, the other side of the driven piece acts on the valve cover, and a bias spring is arranged between the valve cover and the centrifugal valve body.

4. A selectively rotatable moving valve according to claim 2 or 3, wherein: the cam and the roller form an integrated structure, the cam comprises a first cam, a second cam and a third cam, and the first cam, the second cam or the third cam selectively acts with the driven piece by rotating the roller by an operator so as to axially move the driven piece, so that the valve cover is axially moved to control the positions of the first valve port and the second valve port.

5. A selectively rotatable moving valve according to claim 4, wherein: the free ends of the first cam and the third cam are respectively provided with a stop block to prevent the roller from being excessively rotated.

6. A selectively rotatable moving valve according to claim 1, wherein: a wedge-shaped boss is arranged in a centrifugal cavity of the centrifugal valve body, and a discharge channel of the red blood cells is formed between the outer side of the boss and the wall of the centrifugal cavity.

7. A selectively rotatable moving valve according to claim 1, wherein: the position of the first valve port of the valve cover is lower than that of the second valve port.

8. A selectively rotatable moving valve according to claim 3, wherein: when the first cam is jointed with the driven piece, the valve cover is positioned at a first axial position, the first valve port is closed, and the second valve port is closed;