CN220531907U - Simple device for preparing platelet-rich plasma - Google Patents

Abstract

The utility model discloses a simple device for preparing platelet-rich plasma, which includes a centrifuge container. The centrifuge container includes: a centrifuge tube body, a piston, a liquid injection head and an infusion tube. The piston is slidably inserted inside one end of the centrifuge tube body. The liquid injection head is arranged outside the other end of the centrifuge tube body. The infusion tube is used to connect the liquid injection head. The infusion tube is connected to the inside of the centrifuge tube body through the liquid injection head. The liquid injection head on one of the centrifuge containers is connected to one end of the infusion tube. The other end of the infusion tube is connected to the liquid injection head on another centrifugal container. The beneficial effects of this utility model are: only one of the centrifugal containers needs to be placed vertically, and the other centrifugal container extracts the liquid in one of the centrifugal containers. Improved PRP preparation efficiency.

Description

A simple device for platelet-rich plasma preparation

Technical field

The utility model relates to medical equipment, in particular to a simple device for preparing platelet-rich plasma.

Background technique

PRP (Platelet Rich Plasma) is an extract of autologous whole blood that contains high concentrations of platelets and growth factors. There are two types of white blood cell concentration in PRP: Platelet-rich plasma containing high concentrations of white blood cells, referred to as L-PRP (Leukocyte Platelet-Rich Plasma, containing a small amount of red blood cells), which is mainly used for clinical treatments such as bone repair and difficult-to-heal wounds; Platelet-rich plasma containing or containing low concentrations of white blood cells is referred to as P-PRP (Pure Platelet-RichPlasma, without red blood cells), which is more suitable for sports injuries and cosmetic surgery applications.

Existing PRP preparation usually uses a secondary centrifugation method. First, the patient's blood is transported to a centrifuge tube, and the blood in the centrifuge tube is centrifuged for the first time through a centrifuge. After the first centrifugation, the centrifuge tube The blood in the tube is divided into the upper supernatant and the lower red blood cells. Then the red blood cells in the centrifuge tube are extracted, and the remaining supernatant in the centrifuge tube is centrifuged for the second time. After the second centrifugation, The blood in the tube is divided into the upper supernatant and the lower PRP. Finally, the upper supernatant in the centrifuge tube is withdrawn, and the required PRP is what remains in the centrifuge tube. The existing PRP preparation method has defects: the centrifuge tube is placed upside down in the centrifuge. Whether it is a primary centrifugation or a secondary centrifugation, the liquid in the centrifuge tube needs to be placed sideways before extraction. Therefore, Whether the blood after primary centrifugation or secondary centrifugation is placed upside down or placed sideways, the blood will become turbid again, and the blood will lose its stratification function, so the clear liquid prepared by centrifugation cannot be extracted, reducing the PRP preparation efficiency.

Utility model content

The technical problem to be solved by this utility model is that the existing platelet-rich plasma preparation equipment reduces the preparation efficiency of platelet-rich plasma. The purpose is to provide a simple device for the preparation of platelet-rich plasma. The utility model can improve the preparation efficiency of PRP.

The utility model is realized through the following technical solutions:

A simple device for preparing platelet-rich plasma, including a centrifuge container. The centrifuge container includes:

Centrifuge tube body;

A piston, the piston is slidably inserted inside one end of the centrifuge tube body along the axial direction of the centrifuge tube body;

a liquid injection head, which is arranged outside the other end of the centrifuge tube body;

An infusion tube, the infusion tube is used to connect a liquid injection head, and the infusion tube is connected to the inside of the centrifuge tube body through the liquid injection head;

The liquid injection head on one of the centrifuge containers is connected to one end of the infusion tube, and the other end of the infusion pipe is connected to the liquid injection head on the other centrifuge container.

Optionally, the liquid injection head has an external column and a thin tube head, the external column is connected to the infusion tube, and the thin tube head is connected to the inside of the centrifuge tube body and the infusion tube.

Optionally, the external column has internal threads of the external column; the infusion tube has a plastic hose and a plastic cone head, and both ends of the plastic hose are respectively connected to the plastic cone head;

The plastic cone head has an external thread of the cone head, and the external thread of the cone head matches the internal thread of the external column, and the infusion tube and the external column are threaded.

Optionally, the piston has four plastic plates. The four plastic plates are evenly distributed along the circumferential line of the piston. The inner sides of the four plastic plates are connected to the axis of the piston. The plastic plates are There are V-shaped openings on the outside. The V-shaped openings are arranged in an array along the axis of the piston. The distance between two adjacent V-shaped openings along the axis of the piston is 10mm. The plastic plate can be broken every 10mm.

Optionally, one end of the two centrifugal containers is connected to the liquid extraction device, and the other end of the two centrifugal containers is connected to the U-shaped infusion pipe. The two centrifugal containers can pump liquid from the U-shaped infusion pipe simultaneously or separately.

Optionally, the liquid pumping device includes a fixed block, a push-pull rod, a flat-head thumb screw handle, and a connecting member of the liquid pumping device;

The two ends of the push-pull rod are respectively connected to the flat-head thumb screw handle and the connecting member of the liquid pumping device. The push-pull rod is inserted inside the fixed block, and the flat-head thumb screw handle is detachably connected to the push-pull rod.

Optionally, the connecting member of the liquid pumping device has a circular push block, and the end surface of the circular push block away from the end of the push-pull rod is connected with a semicircular annular bump, and the semicircular annular bump is on the outer circumference of the circular push block. There is a groove on the inside of the connection between the circular push block and the semi-circular annular convex block. The piston has a push-pull handle. The push-pull handle is inserted into the groove so that the piston can move along the centrifuge tube body. The push-pull handle slides in the axis direction, and the push-pull handle resists the circular push block.

Optionally, the centrifuge tube body of the centrifuge container is inserted into the centrifuge container placement block.

Optionally, the centrifuge container placement block is provided with a centrifuge container placement hole, the centrifuge container placement hole is a blind hole, and the opening at one end of the centrifuge container placement hole is provided with a conical shape integrated with the centrifuge container placement block. The limiter has a small through hole on the cone-shaped limiter. The centrifuge tube body connected to one end of the liquid injection head has a first tapered surface. The inside of the cone-shaped limiter has a third conical surface. Two tapered surfaces, the first tapered surface resists the second tapered surface, wherein the taper of the first tapered surface is greater than or equal to the taper of the second tapered surface;

The external column passes through the centrifuge container placement hole and is inserted into the small through hole. Part of the external column protrudes from the small through hole, and the outer peripheral wall of the external column fits the inner peripheral wall of the small through hole;

The side wall of the centrifuge container placement block is provided with a through slot for observing the centrifuge container placement hole, and the through groove is connected to the centrifuge container placement hole and the outside of the centrifuge container placement block.

Optionally, the outer peripheral wall of the centrifuge tube body is covered with a tearable point-breaking scouring pad, and the tearable point-breaking scouring pad resists the inner peripheral wall of the centrifuge container placement hole and the centrifuge tube. Between the outer peripheral walls of the centrifuge tube body, a tear-off scouring pad prevents the centrifuge tube body from moving radially in the centrifuge container placement hole.

Compared with the existing technology, this utility model has the following advantages and beneficial effects:

1. The liquid injection head on one of the centrifugal containers of this utility model is connected to one end of the infusion tube, and the other end of the infusion tube is connected to the liquid injection head on the other centrifugal container. Place one of the centrifugal containers vertically on the centrifuge. In the machine, another centrifuge container is connected to one of the centrifuge containers through an infusion tube. There is a plastic hose between the two centrifuge containers. When one of the centrifuge containers is placed vertically, the other centrifuge container can extract one of them at any position. When extracting the liquid in the centrifuge container, whether it is primary centrifugation or secondary centrifugation, one of the centrifuge containers is placed vertically, and the other centrifuge container directly extracts the liquid in one of the centrifuge containers. , the blood in one of the centrifuge containers does not need to go through the process of placing it upside down to placing it sideways. The blood will not become turbid again. The blood has a stratification effect, and the clear liquid prepared by centrifugation can be extracted, which improves the effectiveness of PRP. preparation efficiency.

2. The centrifuge tube body of the centrifuge container of the present utility model is inserted into the centrifuge container placement block. The centrifuge tube body of the centrifuge container is inserted into the centrifuge container placement block. The centrifuge container placement block has a centrifuge container placement hole. The hole is a blind hole, and the opening at one end of the centrifuge container placement hole is provided with a conical stopper integrally formed with the centrifuge container placement block. The conical stopper prevents the centrifuge container or centrifuge tube body from moving toward the U-shaped infusion tube. , a small through hole is opened on the conical stopper, the centrifuge tube body connected to one end of the liquid injection head has a first tapered surface, the inside of the conical stopper has a second conical surface, and the first conical surface The surface contacts the second tapered surface, wherein the taper of the first tapered surface is greater than or equal to the taper of the second tapered surface 124, so that part of the external column extends out of the small through hole in the direction of the U-shaped infusion tube. In addition, the side wall of the centrifuge container placement block is provided with a through slot for observing the inside of the centrifuge container placement hole. The through groove is for easy observation of the scale line on the centrifuge container in the centrifuge container placement block.

3. In this utility model, if there is a gap between the outer peripheral wall of the centrifuge tube body and the inner peripheral wall of the centrifuge container placement hole, the gap between the outer peripheral wall of the centrifuge tube body and the inner peripheral wall of the centrifuge container placement hole can be passed through a tear-off point. Fill it with a scouring pad to prevent the centrifuge tube from moving radially in the hole of the centrifuge container. If there is a tear-off scouring pad covering the outer wall of the centrifuge tube, use a tear-off scouring pad to cover the outer wall of the centrifuge tube. The cloth cannot be inserted into the gap between the outer peripheral wall of the centrifuge tube body and the inner peripheral wall of the centrifuge container placement hole. The tearable point-breaking scouring pad can be broken and torn in the width direction. If there is a tearable point-breaking scouring pad, The point-breaking scouring pad extends out of the centrifuge container placement hole, and can be used to break and tear the tearable point-breaking scouring pad in the length direction.

Description of drawings

The drawings described here are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation on the embodiments of the present invention. In the attached picture:

Figure 1 is an exploded structural diagram of the centrifugal container of the present utility model;

Figure 2 is a partial enlarged view of position A of the present utility model;

Figure 3 is a structural diagram of the infusion tube of the present utility model;

Figure 4 is a structural diagram of the plugging head of the present utility model;

Figure 5 is a structural diagram of the centrifugal container of the present invention;

Figure 6 is a structural diagram of the use of the centrifugal container combined with the squeeze liquid pumping device of the present invention;

Figure 7 is a three-dimensional structural view of the centrifugal container placement block of the present utility model.

Figure 8 is a cross-sectional structural view of the centrifugal container placing block of the present utility model;

Figure 9 is a structural diagram of the liquid pumping device of the present invention;

Figure 10 is a structural diagram of the use of the tear-off scouring pad of the present invention in a centrifuge container placement block.

Marks and corresponding parts names in the attached drawings:

1-centrifuge container, 2-centrifuge tube body, 21-first conical surface, 3-piston, 31-plastic plate, 32-V-shaped mouth, 4-liquid injection head, 5-infusion tube, 51-plastic hose , 6-blocking head, 61-outer wall ring, 62-inner wall ring, 63-outer wall ring internal thread, 64-inner wall ring external thread, 7-plastic cone head, 71-cone head external thread, 8-external column , 81-external column external thread, 82-external column internal thread, 9-thin tube head, 10-extrusion liquid device, 11-push and pull handle, 12-centrifuge container placement block, 121-centrifuge container placement hole, 122-cone shaped limiter, 123-small through hole, 124-second tapered surface, 125-through groove, 13-U-shaped infusion tube, 14-fixing block, 15-push-pull rod, 16-flat head hand screw handle, 17 -Connecting components of the liquid pumping device, 171-round push block, 172-semi-circular annular bump, 173-groove, 18-tearable point-breaking scouring pad.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clear, the utility model will be further described in detail below in conjunction with the embodiments and drawings. The schematic embodiments of the utility model and their descriptions are only used to explain the utility model. The term "new type" does not limit the present invention.

Example 1

As shown in Figures 1-3, this embodiment provides a simple device for preparing platelet-rich plasma, including a centrifuge container 1. The centrifuge container 1 includes: a centrifuge tube body 2, a piston 3, a liquid injection head 4 and an infusion tube 5. The piston 3 is slidably inserted inside one end of the centrifuge tube body 2, and the liquid injection head 4 is arranged outside the other end of the centrifuge tube body 2. The infusion tube 5 is used to connect the liquid injection head 4, and the infusion tube 5 is connected through the liquid injection head 4 Inside the centrifuge tube body 2 , the liquid injection head 4 on one of the centrifuge containers 1 is connected to one end of the infusion tube 5 , and the other end of the infusion tube 5 is connected to the liquid injection head 4 on the other centrifuge container 1 .

As shown in Figure 1, the piston 3 has four plastic plates 31. The four plastic plates 31 are evenly distributed along the circumference of the piston 3. The inner sides of the four plastic plates 31 are connected to the piston 3. At the axis position of 10mm, the setting of the V-shaped opening 32 allows the plastic plate 31 to be broken every 10mm.

As shown in Figure 2-3, the liquid injection head 4 has an external column 8 and a thin tube head 9. The external column 8 is connected to the infusion tube 5. The thin tube head 9 is connected to the inside of the centrifuge tube body 2 and the infusion tube 5. The external column 8 has an external column external thread 81 and an external column internal thread 82. The infusion tube 5 has a plastic hose 51 and a plastic cone head 7. Both ends of the plastic hose 51 are connected to the plastic cone head 7 and the plastic cone head 7 respectively. It has a conical head external thread 71, which matches the external column internal thread 82, the external column 8 is connected to the plastic cone head 7, and the thin tube head 9 connects the infusion tube 5 with the inside of the centrifuge tube body 2.

As shown in Figure 4, the blocking head 6 has an outer wall ring 61 and an inner wall ring 62. The outer wall ring 61 has an outer wall ring internal thread 63. The inner wall ring 62 has an inner wall ring external thread 64. The outer wall ring internal thread 63 and the external column external thread 81 The threads cooperate, the inner wall ring external thread 64 cooperates with the external column internal thread 82, and the sealing head 6 covers the liquid injection head 4.

As shown in Figure 5, one of the centrifuge containers 1 is placed vertically in the centrifuge. The other centrifuge container 1 is connected to one of the centrifuge containers 1 through the infusion tube 5. There is a plastic hose between the two centrifuge containers 1. 51, thus, when one of the centrifuge containers 1 is placed vertically, the other centrifuge container 1 can extract the liquid in one of the centrifuge containers 1 at any position.

Whether it is primary centrifugation or secondary centrifugation, when extracting the liquid in the centrifuge container 1, one of the centrifuge containers 1 is directly placed vertically, and the other centrifuge container 1 directly extracts the liquid in one of the centrifuge containers 1, where The blood in a centrifuge container 1 does not need to go through the process of placing it upside down to placing it sideways. The blood will not become turbid again. The blood has a layering effect, and the clear liquid prepared by centrifugation can be extracted, which improves the preparation of PRP. efficiency.

Example 2

As shown in Figure 6, one end of the two centrifugal containers 1 is connected to the liquid pumping device 10, and the other end of the two centrifugal containers 1 is connected to the U-shaped infusion tube 13.

As shown in FIG. 9 , the fluid extraction device 10 includes a fixed block 14 , a push-pull rod 15 , a flat-head thumb screw handle 16 and a fluid extraction device connecting member 17 .

The two ends of the push-pull rod 15 are respectively connected to the flat-head thumb screw handle 16 and the fluid pumping device connecting member 17. The push-pull rod 15 is inserted inside the fixed block 14, and the flat-head thumb screw handle 16 is detachably connected to the push-pull rod 15.

The connecting member 17 of the pumping liquid device has a circular push block 171. The end surface of the circular push block 171 away from the end of the push-pull rod 15 is connected with a semicircular annular convex block 172. The semicircular annular convex block 172 is outside the circular push block 171. There is a groove 173 on the inside of the connection between the circular push block 171 and the semi-circular annular bump 172. The piston 3 has a push-pull handle 11, and part of the pull handle 11 is inserted into the groove 173, so that the piston 3 Sliding along the axis direction of the centrifuge tube body 2 , the push-pull handle 11 resists the circular push block 171 .

As shown in Figure 7-8, the centrifuge tube 2 of the centrifuge container 1 is inserted into the centrifuge container placement block 12. The centrifuge container placement block 12 has a centrifuge container placement hole 121. The centrifuge container placement hole 121 is a blind hole. The opening of one end of the container placement hole 121 is provided with a cone-shaped stopper 122 integrally formed with the centrifuge container placement block 12. The cone-shaped stopper 122 prevents the centrifuge container 1 or the centrifuge tube body 2 from facing the U-shaped infusion tube 13. Move, the cone-shaped stopper 122 has a small through hole 123, the centrifuge tube 2 connected to one end of the liquid injection head 4 has a first tapered surface 21, and the inside of the cone-shaped stopper 122 has a second cone. The first tapered surface 21 resists the second tapered surface 124, and the taper of the first tapered surface 21 is greater than or equal to the taper of the second tapered surface 124, so that part of the external column 8 faces U The direction of the type infusion tube 13 extends from the small through hole 123.

The external column 8 passes through the centrifuge container placement hole 121 and is inserted into the small through hole 123. Part of the external column 8 protrudes from the small through hole 123, and the outer peripheral wall of the external column 8 fits the inner peripheral wall of the small through hole 123.

The side wall of the centrifuge container placement block 12 is provided with a through slot 125 for observing the inside of the centrifuge container placement hole 121. The through slot 125 is connected to the centrifuge container placement hole 121 and the outside of the centrifuge container placement block 12. The purpose of providing the through slot 125 is In order to observe the liquid contained in the centrifuge container 1 provided in the centrifuge container placement block 12 or read the volume of the liquid infusion or pumping, because the centrifuge container can be known by observing or reading the scale line on the centrifuge container 1 through the through slot 125 The volume of liquid within 1 for infusion or withdrawal.

In this embodiment, as shown in Figure 6, the two centrifugal containers 1 are used to infuse or extract liquids from the infusion tube 13 individually. The centrifugal containers 1 on the front and rear sides act through their respective push-pull rods 15, and the push-pull rods 15 on the front side work in pairs. The centrifugal container 1 on the front side pushes and pulls to make the centrifugal container 1 on the front side pump out or infuse the U-shaped infusion tube 13. In the same way, the push-pull rod 15 on the rear side pushes and pulls the centrifugal container 1 on the rear side so that the centrifugal container 1 on the rear side pairs. The U-shaped infusion tube 13 draws liquid or infuses liquid. If the two centrifugal containers 1 are infused or pumped at the same time, the infusion tube 13 can be used to output or pump out different proportions of liquid inside the two centrifugal containers 1 .

The infusion tube 13 is made in the same way as the infusion tube 5. The infusion tube 13 also uses a plastic hose 51 to connect the plastic cone head 7, except that a plastic cone head 7 is provided in the middle of the plastic hose 51 to pass through the plastic hose. 51 to connect the other two plastic cone heads 7. The plastic conical head 7 on the infusion tube 13 also has a conical head external thread 71 to match the external column internal thread 82.

Example 3

As shown in Figure 10, if there is a gap between the outer peripheral wall of the centrifuge tube body 2 and the inner peripheral wall of the centrifuge container placement hole 121, the gap between the outer peripheral wall of the centrifuge tube body 2 and the inner peripheral wall of the centrifuge container placement hole 121 can pass through. The tear-off point-break scouring pad 18 is used for filling to prevent the centrifuge tube body 2 from moving radially in the centrifuge container placement hole 121. The outer peripheral wall of the centrifuge tube body 2 is covered with a tear-off point-break scouring pad 18. At present, the tear-off point-breaking scouring pad 18 is a well-known product in the market. The tear-off point-breaking scouring pad 18 is in contact between the inner peripheral wall of the centrifuge container placement hole 121 and the outer peripheral wall of the centrifuge tube body 2 .

The tearable point-breaking scouring pad 18 can be torn along the points of the tearable point-breaking scouring pad 18 , and the tearable point-breaking scouring pad 18 can be torn along the points along its length direction. Or the tearable point-breaking scouring pad 18 can be broken and torn along its width direction.

For example: if there is a tearable point-breaking scouring pad 18 covering the outer peripheral wall of the centrifuge tube body 2, the tearable point-breaking scouring pad 18 cannot be inserted into the outer peripheral wall of the centrifuge tube body 2 and the centrifuge container. The gap between the inner peripheral walls of the placement hole 121 can be used to point-break and tear the tear-off scouring pad 18 in the width direction (as shown in Figure 10). If there is a tear-off point-break scouring pad 18 protrudes from the centrifugal container placement hole 121, and the tearable point-breaking scouring pad 18 can be broken and torn in the length direction.

The above-mentioned specific embodiments further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above-mentioned are only specific implementations of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (10)

1. A simple device for the preparation of platelet rich plasma, comprising a centrifugation container (1), characterized in that the centrifugation container (1) comprises:

a centrifuge tube body (2);

the piston (3) is inserted into one end of the centrifuge tube body (2) in a sliding manner along the axis direction of the centrifuge tube body (2);

the liquid injection head (4) is arranged outside the other end of the centrifuge tube body (2);

the infusion tube (5) is used for being connected with the liquid injection head (4), and the infusion tube (5) is communicated to the inside of the centrifuge tube body (2) through the liquid injection head (4);

one of the centrifugal containers (1) is provided with a liquid injection head (4) connected with one end of a transfusion tube (5), and the other end of the transfusion tube (5) is connected with the liquid injection head (4) on the other centrifugal container (1).

2. The simple device for preparing platelet-rich plasma according to claim 1, wherein the liquid injection head (4) is provided with an external column (8) and a thin tube head (9), the external column (8) is connected with the infusion tube (5), and the thin tube head (9) is communicated with the inside of the centrifuge tube body (2) and the infusion tube (5).

3. A simplified apparatus for the preparation of platelet rich plasma as claimed in claim 2, wherein said external column (8) has external column internal threads (82); the infusion tube (5) is provided with a plastic hose (51) and a plastic conical head (7), and two ends of the plastic hose (51) are respectively connected with the plastic conical head (7);

the plastic conical head (7) is provided with a conical head external thread (71), and the conical head external thread (71) is matched with the external column internal thread (82).

4. The simple device for preparing platelet-rich plasma according to claim 1, wherein the piston (3) is provided with four plastic plates (31), the four plastic plates (31) are uniformly distributed along the circumferential line of the piston (3), the inner sides of the four plastic plates (31) are connected at the axial position of the piston (3), the outer sides of the plastic plates (31) are provided with V-shaped ports (32), the V-shaped ports (32) are arranged in an array along the axial direction of the piston (3), and the interval between two adjacent V-shaped ports (32) along the axial direction of the piston (3) is 10mm.

5. The simple device for preparing platelet-rich plasma according to claim 1, wherein one end of the two centrifugal containers (1) is connected with the liquid pumping device (10), and the other end of the two centrifugal containers (1) is connected with the U-shaped infusion tube (13).

6. The simple device for preparing platelet rich plasma according to claim 5, wherein the liquid pumping device (10) comprises a fixed block (14), a push-pull rod (15), a flat-headed hand screw handle (16) and a liquid pumping device connecting member (17);

the two ends of the push-pull rod (15) are respectively connected with the flat head hand screw handle (16) and the connection member (17) of the liquid pumping and extruding device, the push-pull rod (15) is inserted in the fixing block (14), and the flat head hand screw handle (16) is detachably connected with the push-pull rod (15).

7. The simple device for preparing platelet-rich plasma according to claim 6, wherein the connection member (17) of the liquid pumping device is provided with a round push block (171), a semicircular annular projection (172) is connected to the end face of the round push block (171) far away from one end of the push-pull rod (15), the semicircular annular projection (172) is arranged at the outer circumference of the round push block (171), a groove (173) is formed in the inner side of the connection part of the round push block (171) and the semicircular annular projection (172), the piston (3) is provided with a push-pull handle (11), the push-pull handle (11) is inserted into the groove (173), and the push-pull handle (11) is abutted to the round push block (171).

8. A simple device for the preparation of platelet rich plasma according to claim 1, characterized in that the centrifuge tube body (2) of the centrifuge vessel (1) is inserted in a centrifuge vessel placement block (12).

9. The simple device for preparing platelet-rich plasma according to claim 8, wherein a centrifugal container placing hole (121) is formed in the centrifugal container placing block (12), the centrifugal container placing hole (121) is a blind hole, a conical limiting piece (122) integrally formed with the centrifugal container placing block (12) is arranged in a hole opening at one end of the centrifugal container placing hole (121), a small through hole (123) is formed in the conical limiting piece (122), a first conical surface (21) is formed in the centrifuge tube body (2) connected with one end of the liquid injection head (4), a second conical surface (124) is formed in the conical limiting piece (122), and the first conical surface (21) is abutted against the second conical surface (124), wherein the conical degree of the first conical surface (21) is greater than or equal to that of the second conical surface (124);

the external column (8) passes through the centrifugal container placing hole (121) and is inserted into the small through hole (123), part of the external column (8) extends out of the small through hole (123), and the outer peripheral wall of the external column (8) is attached to the inner peripheral wall of the small through hole (123);

the side wall of the centrifugal container placing block (12) is provided with a through groove (125) for observing the inside of the centrifugal container placing hole (121), and the through groove (125) is communicated with the outside of the centrifugal container placing hole (121) and the centrifugal container placing block (12).

10. The simple device for preparing platelet-rich plasma according to claim 9, wherein the outer peripheral wall of the centrifuge tube body (2) is coated with a tearable point-breaking scouring pad (18), and the tearable point-breaking scouring pad (18) is abutted between the inner peripheral wall of the centrifuge container placing hole (121) and the outer peripheral wall of the centrifuge tube body (2).