Floating extrusion assembly, pressurizer, peristaltic pump and blood treatment apparatus

Abstract

This utility model relates to a floating compression assembly, a pressurizer, a peristaltic pump, and a blood processing device. The floating compression assembly includes a rotating shaft, a bushing, a guide pin, and an elastic element. One end of the rotating shaft is used to drive the output shaft of the pressurizer's drive motor, and the rotating shaft is eccentrically positioned. A first mounting hole extending radially along the rotating shaft is provided. The bushing is fitted onto the rotating shaft, with at least a portion of its inner wall spaced apart from the rotating shaft. A second mounting hole is provided on the bushing. The guide pin passes through the first and second mounting holes, with both ends of the guide pin engaging with the bushing. One end of the elastic element abuts against the bushing, and the other end abuts against the rotating shaft. In this floating compression assembly, the compression sleeve and bushing can move relative to the rotating shaft. The elastic force of the elastic element adaptively adjusts the compression force between the compression sleeve and the tubing, preventing excessive or insufficient local pressure on the tubing, effectively preventing the destruction of red blood cells in the blood, ensuring blood quality, and reducing wear on the tubing.

Description

Technical Field

[0001] This utility model relates to the field of peristaltic pump technology, specifically to a floating compression assembly, a pressurizer, a peristaltic pump, and a blood processing device. Background Technology

[0002] A peristaltic pump, also known as a tubing pump, is a positive displacement pump that delivers fluid by periodically squeezing a tubing. It is commonly used in the medical field for blood processing. The peristaltic pump works by having a rotating rotor sequentially squeeze different sections of the tubing on the stator, creating a forward-moving sealed zone that generates negative pressure, forcing the fluid within the tubing forward. However, in related technologies, improper installation and other factors can cause uneven stress on the tubing. This can easily lead to premature wear in certain areas, affecting the tubing's lifespan, and may even damage red blood cells due to excessive pressure, thus affecting the effectiveness of blood processing. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a floating compression assembly, in which the compression sleeve can float relative to the rotating shaft. The compression force between the compression sleeve and the hose is adaptively adjusted by the elastic force of the elastic element, which can avoid excessive or insufficient local pressure on the hose, effectively prevent the destruction of red blood cells in the blood, ensure blood quality, and reduce wear on the hose.

[0005] An embodiment of this utility model proposes a pressure device.

[0006] An embodiment of this utility model proposes a peristaltic pump.

[0007] An embodiment of this utility model proposes a blood processing device.

[0008] A floating extrusion assembly according to an embodiment of the present invention includes a rotating shaft, a bushing, a guide pin, an elastic element, and an extrusion sleeve. One end of the rotating shaft is used to drive the output shaft of a drive motor of a pressure device, and the rotating shaft is eccentrically positioned. A first mounting hole extending radially is provided on the rotating shaft. The bushing is sleeved on the rotating shaft, and at least a portion of the inner wall surface of the bushing is spaced apart from the rotating shaft. A second mounting hole is provided on the bushing, and the second mounting hole is opposite to the first mounting hole. The guide pin passes through the first mounting hole and the second mounting hole, and both ends of the guide pin cooperate with the bushing. One end of the elastic element abuts against the bushing, and the other end of the elastic element abuts against the rotating shaft. The extrusion sleeve is sleeved on the bushing.

[0009] The floating extrusion assembly of this utility model allows the extrusion sleeve and bushing to move relative to the rotating shaft. The extrusion force between the extrusion sleeve and the hose is adaptively adjusted by the elastic force of the elastic element, which can avoid excessive or insufficient local pressure on the hose, effectively prevent the destruction of red blood cells in the blood, ensure blood quality, and reduce wear on the hose.

[0010] In some embodiments, the bushing is provided with a third mounting hole, the third mounting hole and the second mounting hole are opposite to each other and communicate with each other, and the third mounting hole and the second mounting hole form a stepped hole; the guide pin includes a column segment and a plate segment, the column segment and the plate segment are connected, the column segment is located in the second mounting hole and the first mounting hole, and the plate segment is located in the third mounting hole.

[0011] In some embodiments, the bushing has the second mounting hole on both sides in its radial direction.

[0012] In some embodiments, the floating extrusion assembly further includes a first bearing, wherein the first bearing is disposed between the bushing and the extrusion sleeve;

[0013] And / or, the elastic element is a spring, a mounting groove is provided on the wall of the first mounting hole, one end of the mounting groove faces the opening of the bushing, the spring is located in the mounting groove, and the spring is sleeved on the guide pin.

[0014] In some embodiments, the floating extrusion assembly further includes a support base and a first positioning pin. The support base is provided with an assembly hole and a fourth mounting hole. The assembly hole is used to connect with the output shaft of the drive motor. The fourth mounting hole is located on one side of the assembly hole in the radial direction. One end of the rotating shaft is installed in the fourth mounting hole. Both the support base and one end of the rotating shaft are provided with opposing first positioning holes. The first positioning pin is installed in the opposing first positioning holes.

[0015] In some embodiments, the floating extrusion assembly further includes a bearing housing, a second locating pin, and a first fixing bolt. The bearing housing is disposed at the other end of the rotating shaft. Both the bearing housing and the other end of the rotating shaft are provided with opposing second locating holes. The second locating pin is installed in the opposing second locating holes. The bearing housing and the rotating shaft are connected by the first fixing bolt. The bearing housing is rotatably connected to the upper cover of the peristaltic pump. The rotation center of the bearing housing is located on the extension line of the rotation axis of the support base; and / or, The extrusion sleeve is frustoconical in shape.

[0016] The pressurizer of this utility model embodiment includes a drive motor and any of the floating extrusion components described in the present invention. The drive motor is connected to one end of the rotating shaft, and the rotating shaft is eccentrically positioned.

[0017] The peristaltic pump of this utility model embodiment includes a top cover, a hose, and the aforementioned pressurizer. The top cover is disposed on the drive motor of the pressurizer, and the hose is disposed inside the top cover. The compression sleeve applies periodic pressure to the hose so that fluid flows within the hose.

[0018] In some embodiments, the compression sleeve is frustoconical, and the inner surface of the upper cover is a frustoconical surface.

[0019] The blood processing device of this utility model includes any of the peristaltic pumps described in the present invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the floating extrusion assembly according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the rotating shaft and bushing according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the peristaltic pump according to an embodiment of the present invention.

[0021] Figure label: 1000, Peristaltic pump; 100. Extrusion assembly; 1. Shaft; 11. First mounting hole; 111. Mounting groove; 2. Bushing; 21. Second mounting hole; 22. Third mounting hole; 3. Guide pin; 31. Column segment; 32. Plate segment; 4. Elastic element; 5. Extrusion sleeve; 6. First bearing; 7. Support seat; 71. Circumvention groove; 72. Assembly hole; 8. First locating pin; 9. Bearing seat; 10. Second locating pin; 110. First fixing bolt; 200. Drive motor; 300, Top cover; 400, Hose; 500, Mounting base; 600, Second bearing; 700, Fixing base; 800, Lip seal; 900, Annular seal. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] The following is a reference to the appendix. Figures 1 to 3 The present invention describes in detail the floating compression assembly 100, the pressure device, the peristaltic pump 1000, and the blood processing equipment according to embodiments of the present invention.

[0024] like Figure 3As shown, the peristaltic pump 1000 of this embodiment includes a top cover 300, a hose 400, and a pressure device. The top cover 300 is disposed on the drive motor 200 of the pressure device, and the hose 400 is disposed on the inner side of the top cover 300.

[0025] The pressurizer of this utility model embodiment includes a drive motor 200 and a floating extrusion assembly 100.

[0026] like Figures 1 to 3 As shown, the floating extrusion assembly 100 of this embodiment includes a rotating shaft 1, a bushing 2, a guide pin 3, an elastic element 4, and an extrusion sleeve 5. One end of the rotating shaft 1 is connected to the output shaft of a drive motor 200, and a first mounting hole 11 extending radially is provided on the rotating shaft 1. The bushing 2 is sleeved on the rotating shaft 1, at least a portion of the inner wall surface of the bushing 2 is spaced apart from the rotating shaft 1, and the inner diameter of the bushing 2 is larger than the diameter of the rotating shaft 1. A second mounting hole 21 is provided on the bushing 2, and the second mounting hole 21 is opposite to the first mounting hole 11. The guide pin 3 passes through the first mounting hole 11 and the second mounting hole 21, and both ends of the guide pin 3 are engaged with the bushing 2. One end of the elastic element 4 abuts against the bushing 2, and the other end of the elastic element 4 abuts against the rotating shaft 1. The extrusion sleeve 5 is sleeved on the bushing 2, and the outer peripheral surface of the extrusion sleeve 5 is an extrusion surface. The outer peripheral surface of the extrusion sleeve 5 applies periodic pressure to the hose 400 so that fluid flows within the hose 400.

[0027] When using the peristaltic pump 1000 of this utility model embodiment, the drive motor 200 is turned on, and the output shaft of the drive motor 200 drives the rotating shaft 1 to rotate, thereby driving the floating extrusion assembly 100 to rotate. The rotating extrusion sleeve 5 sequentially extrudes different parts of the hose 400, forming periodic pressure on the hose 400, which drives the fluid in the hose 400 to flow forward.

[0028] like Figure 1 As shown, with Figure 1The description is based on the left-right direction shown. In the floating extrusion assembly 100 of this embodiment, the inner diameter of the bushing 2 is larger than the diameter of the rotating shaft 1, which allows the bushing 2 to have a movement clearance relative to the rotating shaft 1. This reduces the precision requirements for the fit tolerances between the rotating shaft 1 and the bushing 2, and lowers the assembly difficulty of the rotating shaft 1 and the bushing 2. Furthermore, the guide pin 3 passes through the second mounting hole 21 of the bushing 2 and the first mounting hole 11 of the rotating shaft 1. Both ends of the guide pin 3 are engaged with the bushing 2, making the connection between the guide pin 3 and the bushing 2 stable. This ensures that the movement of the bushing 2 relative to the rotating shaft 1 is along the extension direction of the guide pin 3, preventing the bushing 2 from rotating relative to the rotating shaft 1 and preventing the elastic element 4 from twisting circumferentially along the rotating shaft 1. This helps to improve the stability and reliability of the floating extrusion assembly 100 of this embodiment. An elastic element 4 is provided between the bushing 2 and the rotating shaft 1. The elastic element 4 is under pressure. When the extrusion sleeve 5 is not subjected to radial external force, the elastic force of the elastic element 4 causes one side (right side) of the bushing 2 to abut against the rotating shaft 1 and the other side (left side) of the bushing 2 to be separated from the rotating shaft 1. When the extrusion sleeve 5 is subjected to radial external force, the bushing 2 is subjected to a force from its other side (left side) toward its other side (right side). The extrusion sleeve 5 and the bushing 2 float freely along the direction of the guide pin 3 to achieve a balance between the force and the elastic force of the elastic element 4. (It should be noted that when the force on the bushing 2 causes the other side of the bushing 2 to abut against the rotating shaft 1, the movement of the bushing 2 from left to right is limited by the rotating shaft 1 and it no longer moves to the right.)

[0029] When the peristaltic pump 1000 is in operation, and the left side of the squeezing sleeve 5 of the floating squeezing assembly 100 squeezes the hose 400, the force exerted by the hose 400 on the squeezing sleeve 5 interacts with the elastic force of the elastic element 4, causing the bushing 2 and the squeezing sleeve 5 to float within the gap range between the bushing 2 and the rotating shaft 1. This prevents the squeezing force of the squeezing sleeve 5 on the hose 400 from being too large or too small compared to the set squeezing force, that is, it prevents the local pressure of the hose 400 from being too large or too small. This allows the squeezing sleeve 5 to apply uniform pressure to the hose 400, thereby effectively preventing the destruction of red blood cells in the blood due to excessive pressure, ensuring blood quality. At the same time, the uniform pressure distribution can also reduce the wear of the pipeline and extend its service life.

[0030] Therefore, in this embodiment of the present invention, the floating extrusion assembly 100, the extrusion sleeve 5 and the bushing 2 can move relative to the rotating shaft 1. The extrusion force between the extrusion sleeve 5 and the hose 400 can be adaptively adjusted by the elastic force of the elastic element 4, which can avoid excessive or insufficient local pressure on the hose 400, effectively prevent the red blood cells in the blood from being destroyed, ensure blood quality, and reduce wear on the hose 400.

[0031] Therefore, the pressurizer of this utility model embodiment can avoid excessive or insufficient local pressure on the hose 400, effectively ensuring that the error between the pressure applied by the pressurizer to the hose 400 and the set pressure is small and within an acceptable range, preventing damage to red blood cells in the blood, ensuring blood quality, and reducing wear on the hose 400.

[0032] Therefore, the peristaltic pump 1000 of this utility model embodiment can prevent the destruction of red blood cells in the blood, ensure blood quality, reduce wear on the hose 400, and extend service life.

[0033] In some embodiments, the bushing 2 is provided with a third mounting hole 22, which is opposite to and communicates with the second mounting hole 21, forming a stepped hole. The guide pin 3 includes a column segment 31 and a plate segment 32 connected together. The column segment 31 is located in the second mounting hole 21 and the first mounting hole 11, and the plate segment 32 is located in the third mounting hole 22. The stepped hole formed by the third mounting hole 22 and the second mounting hole 21 results in a large contact area between the guide pin 3 and the bushing 2, which helps to improve the stability of the connection between the guide pin 3 and the bushing 2, further reducing the probability of the guide pin 3 becoming loose, thereby further improving the stability and reliability of the floating extrusion assembly 100 of this utility model embodiment.

[0034] Specifically, such as Figure 2 As shown, the diameter of the third mounting hole 22 is larger than the diameter of the second mounting hole 21, and the third mounting hole 22 is located outside the second mounting hole 21. Correspondingly, the plate segment 32 of the guide pin 3 is located at the right end of the column segment 31.

[0035] Specifically, in some embodiments, the plate segment 32 is provided with a through hole, and the bushing 2 is provided with a threaded hole in the third mounting hole 22. The threaded hole and the through hole are opposite to each other. After the bolt passes through the through hole of the plate segment 32, it fits into the threaded hole of the bushing 2 to realize the fixed connection between the guide pin 3 and the bushing 2.

[0036] In some other embodiments, the second mounting hole 21 is provided with an internal thread section, and the guide pin 3 is provided with an external thread section. The guide pin 3 and the bushing 2 are fixedly connected by the cooperation of the external thread section and the internal thread section.

[0037] Furthermore, the bushing 2 has second mounting holes 21 on both sides in its radial direction. For example... Figure 1 As shown, the two sides of the column segment 31 of the guide pin 3 are respectively located in two second mounting holes 21, and the second mounting hole 21 on the right side is connected to a third mounting hole 22. The plate segment 32 of the guide pin 3 is located in the third mounting hole 22.

[0038] Specifically, the elastic element 4 is a spring, and a mounting groove 111 is provided on the wall of the first mounting hole 11. One end of the mounting groove 111 (for example) Figure 2 The left end of the spring faces the bushing 2, and the spring is located in the mounting groove 111, with the spring sleeved on the guide pin 3. Figure 1 and Figure 2 As shown, the spring is sleeved on the column segment 31 of the guide pin 3, with the right end of the spring abutting against the rotating shaft 1 and the left end of the spring abutting against the bushing 2. The column segment 31 can guide the deformation of the spring, thereby further ensuring the smoothness of the spring deformation, avoiding deflection, and thus further improving the reliability of the floating extrusion assembly 100.

[0039] In some embodiments, the floating extrusion assembly 100 further includes a first bearing 6, which is provided between the bushing 2 and the extrusion sleeve 5, so that the extrusion sleeve 5 can rotate around the bushing 2 and the sliding friction of the extrusion sleeve 5 relative to the hose 400 is changed to rolling friction, thereby reducing the coefficient of friction between the extrusion sleeve 5 and the hose 400, which is beneficial to further reduce the wear of the hose 400 and further improve the service life of the hose 400.

[0040] In some embodiments, the compression sleeve 5 is frustoconical, and the inner surface of the upper cover 300 is also frustoconical. The frustoconical shape of the inner surface of the upper cover 300 can reduce the axial dimension of the upper cover 300 while ensuring the space required for the installation of the hose 400, thereby facilitating a reduction in the volume of the upper cover 300 and the peristaltic pump 1000.

[0041] In some embodiments, the floating extrusion assembly 100 further includes a support base 7 and a first positioning pin 8. The support base 7 has a mounting hole 72 and a fourth mounting hole. The mounting hole 72 is connected to the output shaft of the drive motor 200. One end of the rotating shaft 1 is installed in the fourth mounting hole, which is located on one side of the mounting hole 72 in the radial direction, so that the rotating shaft 1 is eccentrically positioned relative to the output shaft of the drive motor 200. Both the support base 7 and the lower end of the rotating shaft 1 have opposing first positioning holes, and the first positioning pin 8 is installed in the opposing first positioning holes. The rotating shaft 1 is eccentrically positioned on the output shaft of the drive motor 200 through the support base 7, and the rotating shaft 1 is positioned and connected to the support base 7 through the first positioning pin 8.

[0042] In some embodiments, the floating extrusion assembly 100 further includes a bearing seat 9, a second positioning pin 10, and a first fixing bolt 110. The bearing seat 9 is located at the other end (upper end) of the rotating shaft 1. Both the bearing seat 9 and the other end of the rotating shaft 1 are provided with opposing second positioning holes. The second positioning pin 10 is installed in the opposing second positioning holes. The bearing seat 9 and the rotating shaft 1 are connected by the first fixing bolt 110. The peristaltic pump 1000 includes a third bearing. The bearing seat 9 is rotatably connected to the upper cover 300 through the third bearing. The rotation center of the bearing seat 9 is located on the extension line of the rotation axis of the support 7.

[0043] The rotation center of the bearing seat 9 of the floating extrusion assembly 100 is located on the extension line of the rotation axis of the support 7. Therefore, the rotating shaft 1 is inclined relative to the rotation axis of the support 7 (output shaft of the drive motor 200). When the drive motor 200 drives the rotating shaft 1 to rotate through the support 7, the bearing seat 9 at the upper end of the rotating shaft 1 rotates synchronously without revolution. This allows the upper end of the rotating shaft 1 to be connected to the upper cover 300 through the third bearing. This not only increases the connection point between the floating extrusion assembly 100 and the fixed part (upper cover 300) of the peristaltic pump 1000, thereby improving the stability and reliability of the installation of the floating extrusion assembly 100, but also reduces the radial dimension of the upper end of the upper cover 300, thereby further reducing the volume of the upper cover 300 and the peristaltic pump 1000.

[0044] Furthermore, the support base 7 is provided with a relief groove 71 to provide space for the inclined rotating shaft 1, bushing 2 and compression sleeve 5, thereby further reducing the volume of the top cover 300 and the peristaltic pump 1000.

[0045] Furthermore, such as Figure 3 As shown, the peristaltic pump 1000 also includes a mounting base 500, a second bearing 600, a fixed base 700, a lip seal 800, and an annular seal 900. The mounting base 500 is mounted on the drive motor 200 and surrounds the output shaft of the drive motor 200. The second bearing 600 is provided between the mounting base 500 and the support base 7. The fixed base 700 includes a first annular plate 7001 and a second annular plate 7002. The first annular plate 7001 surrounds the support base 7. The mounting base 500 is fixedly connected to the lower part of the first annular plate 7001 by bolts. The outer edge of the first annular plate 7001 is connected to the second annular plate 7002. The upper cover 300 is fastened inside the fixed base 700. A lip seal 800 is provided between the upper cover 300 and the first annular plate 7001, and an annular seal 900 is provided between the upper cover 300 and the second annular plate 7002.

[0046] The top cover 300 is mounted on the drive motor 200 of the pressure device via the fixing seat 700 and the mounting seat 500. When the top cover 300 is mounted on the fixing seat 700, the annular sealing ring 900 used to abut against the second ring plate 7002 plays a certain role in limiting and sealing, and the lip sealing ring 800 used to abut against the first ring plate 7001 can play a certain role in sealing, thereby preventing the exchange of air and substances between the inside and outside of the top cover 300.

[0047] The following describes a blood processing device according to an embodiment of the present invention.

[0048] The blood processing device of this utility model includes a peristaltic pump 1000 according to any embodiment.

[0049] Therefore, the blood processing device of this utility model embodiment can effectively prevent the red blood cells in the blood from being destroyed, ensure blood quality, and reduce wear and tear on the hose 400 and the frequency of replacement.

[0050] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A floating extrusion assembly (100), characterized in that, include: A rotating shaft (1) is provided. One end of the rotating shaft (1) is used to drive the output shaft of the drive motor (200) of the pressurizer and the rotating shaft (1) is eccentrically arranged. A first mounting hole (11) is provided on the rotating shaft (1) extending radially thereon. A bushing (2) is sleeved on the rotating shaft (1). At least a portion of the inner wall surface of the bushing (2) is spaced apart from the rotating shaft (1). A second mounting hole (21) is provided on the bushing (2), and the second mounting hole (21) is opposite to the first mounting hole (11). Guide pin (3), the guide pin (3) passes through the first mounting hole (11) and the second mounting hole (21), and both ends of the guide pin (3) are engaged with the bushing (2); The elastic element (4) has one end abutting against the bushing (2) and the other end abutting against the rotating shaft (1); and The extrusion sleeve (5) is sleeved on the bushing (2).

2. The floating extrusion assembly (100) according to claim 1, characterized in that, The bushing (2) is provided with a third mounting hole (22), the third mounting hole (22) and the second mounting hole (21) are opposite to each other and connected, and the third mounting hole (22) and the second mounting hole (21) form a stepped hole; the guide pin (3) includes a column segment (31) and a plate segment (32), the column segment (31) and the plate segment (32) are connected, the column segment (31) is located in the second mounting hole (21) and the first mounting hole (11), and the plate segment (32) is located in the third mounting hole (22).

3. The floating extrusion assembly (100) according to claim 1, characterized in that, The bushing (2) has the second mounting hole (21) on both sides in the radial direction.

4. The floating extrusion assembly (100) according to claim 1, characterized in that, It further includes a first bearing (6), which is provided between the bushing (2) and the extrusion sleeve (5); And / or, the elastic element (4) is a spring, and the wall of the first mounting hole (11) is provided with a mounting groove (111), one end of the mounting groove (111) is open towards the bushing (2), the spring is located in the mounting groove (111), and the spring is sleeved on the guide pin (3).

5. The floating extrusion assembly (100) according to claim 1, characterized in that, The floating extrusion assembly (100) further includes a support base (7) and a first positioning pin (8). The support base (7) is provided with an assembly hole and a fourth mounting hole. The assembly hole is used to connect with the output shaft of the drive motor (200). The fourth mounting hole is located on one side of the assembly hole in the radial direction. One end of the rotating shaft (1) is installed in the fourth mounting hole. Both the support base (7) and the rotating shaft (1) are provided with opposing first positioning holes. The first positioning pin (8) is installed in the opposing first positioning holes.

6. The floating extrusion assembly (100) according to claim 5, characterized in that, Further comprising a bearing housing (9), a second locating pin (10), and a first fixing bolt (110), the bearing housing (9) being disposed at the other end of the rotating shaft (1), both the bearing housing (9) and the other end of the rotating shaft (1) being provided with opposing second locating holes, the second locating pin (10) being installed in the opposing second locating holes, the bearing housing (9) and the rotating shaft (1) being connected by the first fixing bolt (110), the bearing housing (9) being used for rotatable connection with the upper cover (300) of the peristaltic pump (1000), the rotation center of the bearing housing (9) being located on the extension line of the rotation axis of the support base (7); and / or, The extrusion sleeve (5) is frustoconical.

7. A pressurizer, characterized in that, It includes a drive motor (200) and a floating extrusion assembly (100) as described in any one of claims 1 to 6, wherein the drive motor (200) is connected to one end of the rotating shaft (1) and the rotating shaft (1) is eccentrically positioned.

8. A peristaltic pump (1000), characterized in that, The device includes a top cover (300), a hose (400), and a pressurizer as described in claim 7, wherein the top cover (300) is disposed on the drive motor (200) of the pressurizer, the hose (400) is disposed inside the top cover (300), and the compression sleeve (5) applies periodic pressure to the hose (400) so that fluid flows within the hose (400).

9. The peristaltic pump (1000) according to claim 8, characterized in that, The extrusion sleeve (5) is frustoconical, and the inner side of the upper cover (300) is frustoconical.

10. A blood processing device, characterized in that, Includes the peristaltic pump (1000) as described in any one of claims 8-9.

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