A blood separation cup with variable circulating blood volume

Abstract

The present invention discloses a blood separation cup with variable circulating blood volume, which relates to the technical field of blood component separation cups, and comprises a cup body, a cup bottom, a stationary head, an outer core and an inner core fixedly connected to each other, an upper cover and a lower cover fixedly connected to each other, the two ends of the cup body respectively form a sealing structure with the stationary head and the cup bottom, the outer core is fixedly connected in the inner cavity of the cup body, the lower cover is fixedly connected to the stationary head, a recovery flow channel is formed between the cup body and the outer core, the cup body has a separation state for separating blood, the cup body also includes an adjustment state for adjusting the blood volume in the cup body, the stationary head is connected with an adjustment rod for switching between the separation state and the adjustment state, the outer core is provided with an adjustment structure for changing the blood volume in the cup body, the adjustment rod is separated from the adjustment structure in the separation state, and the adjustment rod is connected to the adjustment structure in the adjustment state. The present invention can adjust the blood volume in the blood separation cup without affecting the normal separation function of the separation cup.

Description

Technical Field

[0001] The invention relates to the technical field of blood component separation cups, and in particular to a blood separation cup with variable circulating blood. Background Art

[0002] The blood recovery machine is a device that uses modern medical achievements and high-tech means to collect blood from patients during surgery, filter, separate, wash, purify, and then return it to the patient. The blood separation cup on the blood recovery machine is a key component in the blood recovery process. It can effectively separate and recover blood components, that is, separate plasma from red blood cells, collect plasma, and return red blood cells to the user's body, providing patients with safer and more effective blood transfusion therapy.

[0003] As described in the Chinese patent application with application number 2016214344790, the capacity of the existing blood separation cup is usually fixed, and the capacity of the blood separation cup is directly related to the extracorporeal circulation volume of the user's blood. When used by children and the elderly, excessive extracorporeal circulation of blood can easily cause symptoms such as chest tightness, nausea, vomiting, and palpitations; and when used by users with low plasma content in their blood, due to the limited capacity of a single blood separation cup, red blood cells occupy a large proportion of the space in the blood separation cup. In order to make the collected plasma volume reach the preset target value, multiple circulation operations are often required, which makes the entire collection time too long. Summary of the invention

[0004] The object of the present invention is to provide a blood separation cup with variable circulating blood volume, which can adjust the blood volume in the blood separation cup without affecting the normal separation function of the separation cup.

[0005] In order to solve the above technical problems, the present invention adopts the following solutions:

[0006] A blood separation cup with variable circulating blood volume comprises a cup body, a cup bottom, a stationary head, an outer core and an inner core fixedly connected to each other, an upper cover and a lower cover fixedly connected to each other, the two ends of the cup body respectively form a sealing structure with the stationary head and the cup bottom, the outer core is fixedly connected in the inner cavity of the cup body, the lower cover is fixedly connected to the stationary head, a recovery flow channel is formed between the cup body and the outer core, the cup body has a separation state for separating blood, the cup body also includes an adjustment state for adjusting the blood volume in the cup body, the stationary head is connected to an adjustment rod for switching between the separation state and the adjustment state, the outer core is provided with an adjustment structure for changing the blood volume in the cup body, the adjustment rod is separated from the adjustment structure in the separation state, and the adjustment rod is connected to the adjustment structure in the adjustment state. A convex ring is provided on the outer wall of the top of the adjustment rod, and a ring groove corresponding to the convex ring is provided on the inner wall of the stationary head, and the connection between the stationary head and the adjustment rod is achieved by setting the convex ring and the ring groove. The top of the lower cover is embedded in the bottom end of the top of the adjustment rod. Its function is that, by setting the adjustment rod, the cup body can be switched between the separation state and the adjustment state, and in the separation state, the adjustment rod can be prevented from affecting the separation state of the cup body.

[0007] Furthermore, at least one adjusting groove is provided on the top surface of the outer core, and the adjusting structure includes a block for embedding in the adjusting groove, and at least two incremental holes for being completely blocked by the block are provided on the surface where the adjusting groove contacts the block. In the adjusting state, the block completely blocks the incremental hole or connects the incremental hole with the recovery flow channel as the adjustment rod moves. Its function is that, through the arrangement of the adjusting groove, the block, and the incremental hole, the effect of changing the volume in the cup body can be achieved by changing the spatial relationship between the block and the incremental hole. When the block completely blocks the incremental hole, the space in the incremental hole is isolated from the recovery flow channel, and the volume in the cup body becomes smaller; when the block does not block the incremental hole, the incremental hole is connected with the recovery flow channel, and the volume in the cup body becomes larger.

[0008] Furthermore, the stopper and the adjusting groove are interference fit, and the function of the interference fit is that after the position of the stopper is adjusted, the adjusting groove can fix the position of the stopper through the design of the size relationship between the stopper and the adjusting groove.

[0009] Furthermore, when the cup body is at the standard capacity, at least one incremental hole is not completely blocked by the block. Its function is that, by designing the spatial relationship between the block and the incremental hole when the cup body is at the standard capacity, the volume in the cup body can be adjusted to a state larger than the standard capacity or a state smaller than the standard capacity.

[0010] Furthermore, the adjustment structure also includes an adjustment ring connected to the stopper, the adjustment ring is threadedly connected to a threaded sleeve, the incremental holes are distributed along the axial direction of the threaded sleeve, the adjustment rod is separated from the threaded sleeve in the separated state, and the adjustment rod is connected to the threaded sleeve in the adjustment state. Its function is that, through the arrangement of the adjustment ring and the threaded sleeve and the design of the spatial relationship between the distribution direction of the incremental holes and the threaded sleeve, the adjustment rod can be connected to the threaded sleeve in the adjustment state, and the adjustment rod and the threaded sleeve can be driven to rotate in turn by rotating the stationary head, so that the adjustment ring drives the stopper to move along the axial direction of the threaded sleeve, thereby achieving the effect of making the stopper completely cover different incremental holes.

[0011] Furthermore, the inner wall of the threaded sleeve is provided with a cylindrical hole extending along the axis of the threaded sleeve, the cylindrical hole is connected to the bottom end of the threaded sleeve, the adjustment rod is coaxially arranged with the threaded sleeve, and the outer wall of the adjustment rod is provided with an adjustment tooth for embedding in the cylindrical hole. When the cup body is in the separated state, the adjustment tooth is located below the threaded sleeve; when the cup body is in the adjusted state, the adjustment tooth is located in the cylindrical hole. Its function is that, through the design of the cylindrical hole and the adjustment tooth, the adjustment rod can be separated from the threaded sleeve in the separated state, and the adjustment rod can be connected to the threaded sleeve in the adjusted state.

[0012] Furthermore, the left and right sides of the cylindrical hole are connected with limiting grooves extending along the circumferential direction of the threaded sleeve, and the length of the limiting groove in the axial direction of the threaded sleeve is equal to the length of the adjusting tooth in the axial direction of the threaded sleeve. Its function is that, through the setting of the limiting groove, before the adjusting tooth pushes the threaded sleeve to rotate, the adjusting tooth first enters the limiting groove from the cylindrical hole, thereby preventing the threaded sleeve from moving along its own axial direction relative to the adjusting rod when rotating around its own axis, thereby preventing the block from being unable to move along the axial direction of the threaded sleeve relative to the adjusting groove.

[0013] Furthermore, the adjusting ring is connected with at least two stoppers evenly distributed around the adjusting ring, so that the cup body can maintain balance during the rotation in the separated state through the design of the number of stoppers and the spatial distribution of the stoppers.

[0014] Furthermore, the stationary head is provided with a blood inlet, the adjustment rod is in the shape of a hollow circular tube coaxially arranged with the cup body, and the front and rear ends of the adjustment rod are respectively connected with the blood inlet and the recovery flow channel. The lower cover is sleeved outside the adjustment rod, and the upper cover is sleeved outside the lower cover. The adjustment rod, the upper cover, and the lower cover are all coaxially arranged, and a plasma channel is left between the upper cover and the lower cover. A plasma outlet is provided on the stationary head, and the front and rear ends of the plasma channel are respectively connected with the plasma outlet and the recovery flow channel. At least three support plates are evenly distributed in a circular ring shape around the axial direction of the lower cover on the inner wall of the upper cover, and the inner diameter of the support plate is equal to the outer diameter of the lower cover, and the outer diameter of the support plate is equal to the inner diameter of the upper cover. A limiting protrusion is provided on the outer wall of the support plate, and an annular groove for the limiting protrusion to rotate around the axis of the lower cover is provided inside the upper cover. By setting the support plate, the lower cover in the upper cover can be positioned, and by setting the limiting protrusion and the annular groove, the axial relative movement between the upper cover and the lower cover can be avoided. Its function is that, through the design of the adjustment rod, the adjustment rod can not only play the basic role of transporting blood into the cup body, but also play the effect of switching the state inside the cup body, which can effectively save space inside the cup body.

[0015] Furthermore, the outer core is provided with a through hole for the threaded sleeve and the adjustment rod to pass through, the through hole is provided with a flow plate for the adjustment rod to pass through, the flow plate is provided with a flow port, the flow plate is coaxially arranged with the adjustment rod, and the inner diameter of the flow plate is equal to the outer diameter of the adjustment rod, the flow plate is located below the adjustment tooth, a baffle connected to the adjustment rod is provided below the flow plate, the outer diameter of the baffle is smaller than the outer diameter of the flow plate, the distance between the baffle and the flow plate is equal to the distance between the adjustment tooth and the limiting groove, the top surface of the outer core is provided with a positioning hole extending in a direction parallel to the axial direction of the threaded sleeve, and a positioning column corresponding to the positioning hole is provided on the top surface of the cup body, in the adjustment state, the baffle contacts the flow plate, the adjustment tooth is located within the height range of the limiting groove, and the positioning column is located in the positioning hole. In the separated state, the positioning column is completely located outside the positioning hole. Its function is that, through the setting of the flow plate, the outer core can be fixed so that the outer core and the adjusting rod are kept coaxially arranged; through the setting of the baffle plate, when the adjusting rod is lifted, the baffle plate supports the flow plate, thereby lifting the outer core, so that the positioning column can be located in the positioning hole, thereby preventing the outer core from rotating around the adjusting rod, and after limiting the circumferential rotation of the outer core and the axial movement of the threaded sleeve, when the threaded sleeve rotates, the block can only move along the axial direction of the adjusting rod.

[0016] The present invention has the beneficial effects:

[0017] 1. By setting the adjustment rod, the cup body can be switched between the separation state and the adjustment state, and in the separation state, the adjustment rod can be prevented from affecting the separation state of the cup body;

[0018] 2. By setting the adjusting groove, the block and the incremental hole, the effect of changing the volume in the cup body can be achieved by changing the spatial relationship between the block and the incremental hole. When the block completely blocks the incremental hole, the space in the incremental hole is isolated from the recovery flow channel, and the volume in the cup body becomes smaller; when the block does not block the incremental hole, the incremental hole is connected to the recovery flow channel, and the volume in the cup body becomes larger. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional cross-sectional structure of Example 1 in a separated state;

[0020] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of Example 1 in the state of adjusting the amount;

[0021] Figure 3 Schematic diagram of the three-dimensional structure of the outer core in Example 1;

[0022] Figure 4 It is a three-dimensional cross-sectional structural schematic diagram of the adjustment structure in Example 1;

[0023] Figure 5 is a schematic diagram of the three-dimensional structure of the adjustment rod in Example 1;

[0024] Figure 6 It is a schematic diagram of the three-dimensional cross-sectional structure of the upper cover in Example 1;

[0025] Figure 7 It is a schematic diagram of the three-dimensional cross-sectional structure of the lower cover in Example 1;

[0026] Figure 8 It is a schematic diagram of the three-dimensional cross-sectional structure of the threaded sleeve in Example 1.

[0027] Figure numerals: 1. cup body; 2. cup bottom; 3. stationary head; 4. outer core; 5. inner core; 6. upper cover; 7. lower cover; 8. recovery flow channel; 9. adjustment rod; 10. adjustment groove; 11. block; 12. incremental hole; 13. adjustment ring; 14. threaded sleeve; 15. cylindrical hole; 16. adjustment tooth; 17. limit groove; 18. through hole; 19. flow plate; 20. flow port; 21. baffle; 22. positioning hole; 23. positioning column. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Example 1

[0032] A blood separation cup with variable circulating blood volume, such as Figure 1 As shown, it includes a cup body 1, a cup bottom 2, a stationary head 3, an outer core 4 and an inner core 5 fixedly connected to each other, an upper cover 6 and a lower cover 7 fixedly connected to each other, the two ends of the cup body 1 form a sealing structure with the stationary head 3 and the cup bottom 2 respectively, the outer core 4 is fixedly connected in the inner cavity of the cup body 1, the lower cover 7 is fixedly connected to the stationary head 3, and a recovery flow channel 8 is formed between the cup body 1 and the outer core 4. The cup body 1 has a separation state for separating blood, and the cup body 1 also includes an adjustment state for adjusting the blood volume in the cup body 1. The stationary head 3 is connected to an adjustment rod 9 for switching between the separation state and the adjustment state. The outer core 4 is provided with an adjustment structure for changing the blood volume in the cup body 1. In the separation state, the adjustment rod 9 is separated from the adjustment structure. In the adjustment state, the adjustment rod 9 is connected to the adjustment structure. A convex ring is provided on the outer wall of the top of the adjustment rod 9, and a ring groove corresponding to the convex ring is provided on the inner wall of the stationary head 3. The connection between the stationary head 3 and the adjustment rod 9 is achieved by setting the convex ring and the ring groove. The top of the lower cover 7 is embedded in the bottom of the top of the adjustment rod 9. The sealing structure and principle between the stationary head 3 and the cup body 1 can adopt the existing technology described in the Chinese patent application with application number 201510158256.X, and will not be described in detail. Its function is that through the setting of the adjustment rod 9, the cup body 1 can be switched between the separation state and the adjustment state, and in the separation state, the adjustment rod 9 can be prevented from affecting the separation state of the cup body 1.

[0033] Specifically, Figure 3 As shown, at least one adjusting groove 10 is provided on the top surface of the outer core 4, and the adjusting structure includes a stopper 11 for embedding the adjusting groove 10, and at least two incremental holes 12 for being completely blocked by the stopper 11 are provided on the surface where the adjusting groove 10 contacts the stopper 11. In the adjusting state, the stopper 11 completely blocks the incremental hole 12 or connects the incremental hole 12 with the recovery flow channel 8 as the adjustment rod 9 moves. Its function is that, through the arrangement of the adjusting groove 10, the stopper 11, and the incremental hole 12, the effect of changing the volume in the cup body 1 can be achieved by changing the spatial relationship between the stopper 11 and the incremental hole 12. When the stopper 11 completely blocks the incremental hole 12, the space in the incremental hole 12 is isolated from the recovery flow channel 8, and the volume in the cup body 1 becomes smaller; when the stopper 11 does not block the incremental hole 12, the incremental hole 12 is connected with the recovery flow channel 8, and the volume in the cup body 1 becomes larger.

[0034] Specifically, the stopper 11 is interference fit with the adjusting groove 10. Its function is that, through the design of the size relationship between the stopper 11 and the adjusting groove 10, after the position of the stopper 11 is adjusted, the adjusting groove 10 can fix the position of the stopper 11.

[0035] Specifically, when the cup body 1 is at the standard capacity, at least one incremental hole 12 is not completely blocked by the block 11. The function is that, by designing the spatial relationship between the block 11 and the incremental hole 12 when the cup body 1 is at the standard capacity, the volume in the cup body 1 can be adjusted to a state larger than the standard capacity or a state smaller than the standard capacity.

[0036] Specifically, Figure 4 As shown, the adjustment structure further includes an adjustment ring 13 connected to the stopper 11, the adjustment ring 13 is internally threaded with a threaded sleeve 14, the incremental holes 12 are axially distributed along the threaded sleeve 14, the adjustment rod 9 is separated from the threaded sleeve 14 in the separated state, and the adjustment rod 9 is connected to the threaded sleeve 14 in the adjustment state. Its function is that, through the arrangement of the adjustment ring 13 and the threaded sleeve 14 and the design of the spatial relationship between the distribution direction of the incremental holes 12 and the threaded sleeve 14, the adjustment rod 9 can be connected to the threaded sleeve 14 in the adjustment state, and the adjustment rod 9 and the threaded sleeve 14 can be driven to rotate in sequence by rotating the stationary head 3, so that the adjustment ring 13 drives the stopper 11 to move axially along the threaded sleeve 14, thereby achieving the effect of making the stopper 11 completely cover the different incremental holes 12.

[0037] Specifically, Figure 8As shown, a cylindrical hole 15 extending along the axis of the threaded sleeve 14 is provided on the inner wall of the threaded sleeve 14, the cylindrical hole 15 is connected to the bottom end of the threaded sleeve 14, the adjusting rod 9 is coaxially arranged with the threaded sleeve 14, and an adjusting tooth 16 for embedding in the cylindrical hole 15 is provided on the outer wall of the adjusting rod 9. When the cup body 1 is in the separated state, the adjusting tooth 16 is located below the threaded sleeve 14; when the cup body 1 is in the adjusted state, the adjusting tooth 16 is located in the cylindrical hole 15. Its function is that, through the design of the cylindrical hole 15 and the adjusting tooth 16, the adjusting rod 9 can be separated from the threaded sleeve 14 in the separated state, and the adjusting rod 9 can be connected to the threaded sleeve 14 in the adjusted state.

[0038] Specifically, Figure 8 As shown, the left and right sides of the cylindrical hole 15 are connected with limiting grooves 17 extending along the circumferential direction of the threaded sleeve 14, and the length of the limiting grooves 17 in the axial direction of the threaded sleeve 14 is equal to the length of the adjusting teeth 16 in the axial direction of the threaded sleeve 14. All limiting grooves 17 are fan-shaped and are not connected to each other. Its function is that, through the setting of the limiting grooves 17, before the adjusting teeth 16 push the threaded sleeve 14 to rotate, the adjusting teeth 16 first enter the limiting grooves 17 from the cylindrical hole 15, thereby preventing the threaded sleeve 14 from moving along its own axial direction relative to the adjusting rod 9 when rotating around its own axis, thereby preventing the block 11 from being unable to move along the axial direction of the threaded sleeve 14 relative to the adjusting groove 10.

[0039] Specifically, Figure 4 As shown, the adjusting ring 13 is connected with at least two stoppers 11 evenly distributed around the adjusting ring 13. Its function is to enable the cup body 1 to maintain balance during the rotation in the separated state through the design of the number of stoppers 11 and the spatial distribution of the stoppers 11.

[0040] The stationary head 3 is provided with a blood inlet, and the adjustment rod 9 is in the shape of a hollow circular tube coaxially arranged with the cup body 1, and the front and rear ends of the adjustment rod 9 are respectively connected to the blood inlet and the recovery flow channel 8. Figure 6 , Figure 7As shown, the lower cover 7 is sleeved outside the adjustment rod 9, and the upper cover 6 is sleeved outside the lower cover 7. The adjustment rod 9, the upper cover 6, and the lower cover 7 are all coaxially arranged. A plasma channel is left between the upper cover 6 and the lower cover 7. A plasma outlet is provided on the stationary head 3. The front and rear ends of the plasma channel are respectively connected with the plasma outlet and the recovery flow channel 8. At least three support plates are evenly distributed in a circular ring shape around the axial direction of the lower cover 7 on the inner wall of the upper cover 6. The inner diameter of the support plate is equal to the outer diameter of the lower cover 7, and the outer diameter of the support plate is equal to the inner diameter of the upper cover 6. A limiting protrusion is provided on the outer wall of the support plate. An annular groove for the limiting protrusion to rotate around the axis of the lower cover 7 is provided inside the upper cover 6. The lower cover 7 in the upper cover 6 can be positioned by setting the support plate. The axial relative movement between the upper cover 6 and the lower cover 7 can be avoided by setting the limiting protrusion and the annular groove. Its function is that, through the design of the adjustment rod 9, the adjustment rod 9 can not only play the basic role of conveying blood into the cup body 1, but also play the effect of switching the state in the cup body 1, which can effectively save the space in the cup body 1.

[0041] Specifically, Figure 5 As shown, a through hole 18 is provided in the outer core 4 for the threaded sleeve 14 and the adjusting rod 9 to pass through, a flow plate 19 is provided in the through hole 18 for the adjusting rod 9 to pass through, a flow port 20 is provided on the flow plate 19, the flow plate 19 is coaxially arranged with the adjusting rod 9 and the inner diameter of the flow plate 19 is equal to the outer diameter of the adjusting rod 9, the flow plate 19 is located below the adjusting tooth 16, a baffle 21 connected to the adjusting rod 9 is provided below the flow plate 19, the outer diameter of the baffle 21 is smaller than the outer diameter of the flow plate 19, the distance between the baffle 21 and the flow plate 19 is equal to the distance between the adjusting tooth 16 and the limiting groove 17, a positioning hole 22 is provided on the top surface of the outer core 4, and a positioning column 23 corresponding to the positioning hole 22 is provided on the inner top surface of the cup body 1, and in the adjustment state, the baffle 21 contacts the flow plate 19, the adjusting tooth 16 is located within the height range of the limiting groove 17, and the positioning column 23 is located in the positioning hole 22. In the separated state, the positioning column 23 is completely located outside the positioning hole 22. Its function is to fix the outer core 4 through the setting of the flow plate 19, so that the outer core 4 and the adjustment rod 9 are coaxially arranged; through the setting of the baffle 21, when the adjustment rod 9 is lifted, the baffle 21 supports the flow plate 19, thereby lifting the outer core 4, so that the positioning column 23 can be located in the positioning hole 22, thereby preventing the outer core 4 from rotating around the adjustment rod 9, and after limiting the circumferential rotation of the outer core 4 and the axial movement of the threaded sleeve 14, when the threaded sleeve 14 rotates, the block 11 can only move axially along the adjustment rod 9.

[0042] The working principle of this embodiment is described as follows: Figure 2As shown, before blood separation, the blood volume in the cup body 1 is adjusted according to the user's state. First, the section including the adjusting rod 9 on the stationary head 3 is pinched, so that the axial movement and circumferential rotation of the stationary head 3 can be directly transmitted to the adjusting rod 9, and the stationary head 3 is lifted upward, so that the stationary head 3 drives the adjusting rod 9 to move upward. After the baffle 21 on the adjusting rod 9 contacts the flow plate 19, the positioning column 23 is located in the positioning hole 22. At this time, the cup body 1 is in the volume adjustment state. According to the user's demand for blood volume, the stationary head 3 is turned left or right, so that the adjusting tooth 16 on the adjusting rod 9 enters the limiting groove 17. When the adjusting tooth 16 moves horizontally to the top of the threaded sleeve 14, the adjusting tooth 16 pushes the threaded sleeve 14 to rotate around the adjusting rod 9. At the same time, due to the fixation of the positioning column 23 to the outer core 4, the block 11 and the adjusting ring 13 can only move along the axial direction of the adjusting rod 9, so that the block 11 blocks more incremental holes 12 or exposes more incremental holes 12 to adjust the blood volume in the cup body 1.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. According to the technical essence of the present invention, within the spirit and principles of the present invention, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the present invention.

Claims

1. A blood separation cup with a variable circulating blood volume, comprising a cup body (1), a cup bottom (2), a stationary head (3), an outer core (4) and an inner core (5) fixedly connected to each other, an upper cover (6) and a lower cover (7) fixedly connected to each other, wherein two ends of the cup body (1) respectively form a sealing structure with the stationary head (3) and the cup bottom (2), the outer core (4) is fixedly connected to the inner cavity of the cup body (1), the lower cover (7) is fixedly connected to the stationary head (3), a recovery flow channel (8) is formed between the cup body (1) and the outer core (4), the cup body (1) has a separation state for separating blood, and is characterized in that: The cup body (1) further comprises a volume adjustment state for adjusting the blood volume in the cup body (1); the stationary head (3) is connected to an adjustment rod (9) for switching between a separation state and a volume adjustment state; the outer core (4) is provided with a volume adjustment structure for changing the blood volume in the cup body (1); in the separation state, the adjustment rod (9) is separated from the volume adjustment structure; in the volume adjustment state, the adjustment rod (9) is connected to the volume adjustment structure; The outer core (4) is provided with at least one adjusting groove (10) on its top surface, the adjusting structure comprising a stopper (11) for embedding in the adjusting groove (10), and at least two incremental holes (12) for being completely covered by the stopper (11) are provided on the surface of the adjusting groove (10) in contact with the stopper (11); in an adjusting state, the stopper (11) completely covers the incremental hole (12) or enables the incremental hole (12) to communicate with the outside of the outer core (4) as the adjusting rod (9) moves; The adjustment structure further comprises an adjustment ring (13) connected to the stopper (11); the adjustment ring (13) is internally threadedly connected to a threaded sleeve (14); the incremental holes (12) are distributed axially along the threaded sleeve (14); in a separated state, the adjustment rod (9) is separated from the threaded sleeve (14); in the adjustment state, the adjustment rod (9) is connected to the threaded sleeve (14); The inner wall of the threaded sleeve (14) is provided with a columnar hole (15) extending along the axis of the threaded sleeve (14); the columnar hole (15) is connected to the bottom end of the threaded sleeve (14); the adjustment rod (9) and the threaded sleeve (14) are coaxially arranged; the outer wall of the adjustment rod (9) is provided with an adjustment tooth (16) for embedding into the columnar hole (15); when the cup body (1) is in a separated state, the adjustment tooth (16) is located below the threaded sleeve (14); when the cup body (1) is in an adjusted state, the adjustment tooth (16) is located in the columnar hole (15); The left and right sides of the columnar hole (15) are connected to limit grooves (17) extending in the circumferential direction of the threaded sleeve (14), and the length of the limit grooves (17) in the axial direction of the threaded sleeve (14) is equal to the length of the adjustment teeth (16) in the axial direction of the threaded sleeve (14).

2. A blood separation cup with variable circulating blood volume according to claim 1, characterized in that: The stopper (11) is interference fit with the adjusting groove (10).

3. The blood separation cup with variable circulating blood volume according to claim 1, characterized in that: When the cup body (1) is in a state of standard capacity, at least one incremental hole (12) is not completely blocked by the stopper (11).

4. The blood separation cup with variable circulating blood volume according to claim 1, characterized in that: The adjusting ring (13) is connected to at least two stoppers (11) evenly distributed around the adjusting ring (13).

5. The blood separation cup with variable circulating blood volume according to claim 1, characterized in that: A blood inlet is provided on the stationary head (3), and the adjustment rod (9) is in the shape of a hollow circular tube coaxially arranged with the cup body (1). The front and rear ends of the adjustment rod (9) are respectively connected to the blood inlet and the recovery flow channel (8).

6. The blood separation cup with variable circulating blood volume according to claim 1, characterized in that: The outer core (4) is provided with a through hole (18) for the threaded sleeve (14) and the adjusting rod (9) to pass through, the through hole (18) is provided with a flow plate (19) for the adjusting rod (9) to pass through, the flow plate (19) is provided with a flow opening (20), the flow plate (19) is coaxially arranged with the adjusting rod (9), the inner diameter of the flow plate (19) is equal to the outer diameter of the adjusting rod (9), the flow plate (19) is located below the adjusting tooth (16), a baffle (21) connected to the adjusting rod (9) is provided below the flow plate (19), the outer diameter of the baffle (21) is smaller than the outer diameter of the adjusting rod (9), and the outer diameter of the baffle (21) is smaller than the outer diameter of the adjusting rod (9). The outer diameter of the flow plate (19) is such that the distance between the baffle plate (21) and the flow plate (19) is equal to the distance between the adjustment tooth (16) and the limiting groove (17); a positioning hole (22) extending in a direction parallel to the axial direction of the threaded sleeve (14) is provided on the top surface of the outer core (4); a positioning column (23) corresponding to the positioning hole (22) is provided on the inner top surface of the cup body (1); in the adjustment state, the baffle plate (21) contacts the flow plate (19), the adjustment tooth (16) is located within the height range of the limiting groove (17), and the positioning column (23) is located in the positioning hole (22).

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