Extrusion mechanism of blood separator

Abstract

The utility model relates to an extrusion mechanism of a blood separator. The extrusion mechanism comprises a base plate, the main pressing plate and the base plate are arranged in a spaced mode in the first linear direction, and the main pressing plate can move close to or away from the base plate in the first linear direction; the auxiliary pressing plate and the base plate are distributed in a spaced mode in the second linear direction, the second linear direction is perpendicular to the first linear direction, the auxiliary pressing plate can move close to or away from the main pressing plate in the first linear direction, and the auxiliary pressing plate moves close to the main pressing plate to extrude the part, located between the auxiliary pressing plate and the main pressing plate, of the blood bag; the partition piece is arranged between the base plate and the auxiliary pressing plate and can move close to or away from the main pressing plate in the first linear direction, and the blood bag is tightly pressed on the main pressing plate through the partition piece, so that the part, located between the base plate and the main pressing plate, of the blood bag is not communicated with the part, located between the auxiliary pressing plate and the main pressing plate, of the blood bag. According to the method, the albuginea is extruded out of the blood bag after being separated from the remaining components, the situation that extrusion is incomplete or the remaining components are extruded out is not prone to occurring, and albuginea component separation is more accurate.

Description

Technical Field

[0001] The utility model relates to the field of blood separation technology, and particularly relates to a squeezing mechanism of a blood separator. Background Art

[0002] A blood component separator is a device used to separate blood components. After the blood is centrifuged at high speed and stratified, each layer component is respectively extruded from the whole blood bag by the blood component separator and input into the corresponding collection bag of the component, so as to achieve the purpose of component separation.

[0003] The current blood component separator can only separate plasma and red blood cells. For the buffy coat containing platelets, due to the small amount, usually after the plasma is separated, the buffy coat is manually extruded into the corresponding collection bag. Manual operation has a high labor intensity, and it is easy to occur that the buffy coat is not completely extruded or the remaining components are extruded together. Content of the Utility Model

[0004] Based on the above description, the utility model provides a squeezing mechanism of a blood separator to solve the problems of high labor intensity of manually extruding the buffy coat, incomplete extrusion of the buffy coat, or extrusion of the remaining components together.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] In a first aspect, the present application provides a squeezing mechanism of a blood separator, and the technical solution adopted is as follows:

[0007] A squeezing mechanism of a blood separator includes:

[0008] A base plate;

[0009] A main pressing plate, which is connected to the base plate and is spaced from the base plate in a first linear direction. The main pressing plate can move closer to or away from the base plate along the first linear direction, and is adapted to squeeze the blood bag by moving the main pressing plate closer to the base plate;

[0010] A secondary pressing plate, which is spaced from the base plate in a second linear direction. The second linear direction is perpendicular to the first linear direction. The secondary pressing plate can move closer to or away from the main pressing plate along the first linear direction;

[0011] A separator, which is arranged between the base plate and the secondary pressing plate. The separator can move closer to or away from the main pressing plate along the first linear direction. The separator is used to press the blood bag tightly on the main pressing plate, and make the part of the blood bag located between the base plate and the main pressing plate and the part located between the secondary pressing plate and the main pressing plate not communicate with each other;

[0012] Wherein, when the blood bag is pressed by the partition member against the main pressing plate, the auxiliary pressing plate is adapted to move closer to the main pressing plate to press the portion of the blood bag between the auxiliary pressing plate and the main pressing plate, so as to squeeze the white film out of the blood bag.

[0013] Preferably, a first color sensor is provided on the substrate, which is used to detect the color of the portion of the blood bag between the substrate and the main pressing plate. When the main pressing plate moves closer to the substrate to press the blood bag, and when the color of the white film of the portion of the blood bag between the substrate and the main pressing plate disappears, a signal is sent to the drive system that drives the main pressing plate, the partition member, and the auxiliary pressing plate to move, so that the main pressing plate stops moving and the partition member moves closer to the main pressing plate.

[0014] Preferably, a second color sensor is provided on the auxiliary pressing plate, which is used to detect the color of the portion of the blood bag between the auxiliary pressing plate and the main pressing plate. When the auxiliary pressing plate moves closer to the main pressing plate to press the blood bag, and when the color of the white film of the portion of the blood bag between the main pressing plate and the auxiliary pressing plate disappears, a signal is sent to the drive system that drives the main pressing plate, the partition member, and the auxiliary pressing plate to move, so that the auxiliary pressing plate moves away from the main pressing plate.

[0015] Preferably, a first pressure sensor is provided on the partition member. When the partition member moves closer to the main pressing plate to press the blood bag against the main pressing plate, the pressure between the partition member and the main pressing plate is detected by the first pressure sensor, and when the pressure exceeds the set value, a signal is sent to the drive system that drives the main pressing plate, the partition member, and the auxiliary pressing plate to move, so that the partition member stops moving.

[0016] Preferably, a first photoelectric switch is provided on the partition member, and a first triggering member for triggering the first photoelectric switch is provided on the auxiliary pressing plate. When the partition member presses the blood bag against the main pressing plate, the auxiliary pressing plate can move closer to the main pressing plate until the first triggering member triggers the first photoelectric switch. When the first photoelectric switch is triggered, a signal is sent to the drive system that drives the main pressing plate, the partition member, and the auxiliary pressing plate to move, so that the auxiliary pressing plate stops moving.

[0017] Preferably, the partition member includes a partition plate, and the partition plate is perpendicular to the second linear direction.

[0018] Preferably, a card slot adapted to the partition plate is provided on one side of the main pressing plate close to the partition plate, and the blood bag is adapted to be squeezed and deformed by the partition plate to be embedded in the card slot, so that the blood bag forms two non-communicating parts.

[0019] Preferably, the sides of the main pressing plate and the substrate that face each other and the side of the auxiliary pressing plate that faces the main pressing plate are mutually parallel planes, and the auxiliary pressing plate and the separator can both be moved to a position where they do not protrude between the substrate and the main pressing plate.

[0020] In a second aspect, the present application provides a white film separation method, which uses the squeezing mechanism of the blood separator as described above, and includes:

[0021] Make the second linear direction vertical and the auxiliary pressing plate be located above the substrate, place the blood bag between the main pressing plate and the substrate, and make the blood bag opening face upward;

[0022] The main pressing plate moves close to the substrate to squeeze the blood bag. When the buffy coat component is squeezed to the part of the blood bag located between the main pressing plate and the auxiliary pressing plate, the main pressing plate stops moving and remains in this position;

[0023] The separator moves close to the main pressing plate until the blood bag is pressed tightly against the main pressing plate and the part of the blood bag located between the substrate and the main pressing plate and the part located between the auxiliary pressing plate and the main pressing plate are not connected to each other;

[0024] The auxiliary pressing plate moves close to the main pressing plate to squeeze the part of the blood bag located between the auxiliary pressing plate and the main pressing plate, and squeezes the buffy coat out of the blood bag.

[0025] Preferably, when the auxiliary pressing plate moves close to the main pressing plate to squeeze the part of the blood bag located between the auxiliary pressing plate and the main pressing plate, the auxiliary pressing plate reciprocates multiple times until the buffy coat in the blood bag is completely squeezed out.

[0026] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0027] 1. In this application, the main pressing plate and the base plate cooperate to squeeze the blood bag, so as to squeeze the buffy coat component towards the opening of the blood bag. The auxiliary pressing plate can cooperate with the main pressing plate to squeeze the part of the blood bag located between the main pressing plate and the auxiliary pressing plate. By setting the partition member to cooperate with the main pressing plate, the blood bag can be squeezed onto the main pressing plate through the partition member, dividing the blood bag into two non - communicating parts. In actual use, the second straight - line direction can be set vertically and the auxiliary pressing plate is above the base plate. When the blood bag is placed between the base plate and the main pressing plate, the bag mouth is upward. The part of the blood bag near the bottom is located between the main pressing plate and the base plate, and the part of the blood bag near the bag mouth is located between the main pressing plate and the auxiliary pressing plate. In the initial state, the auxiliary pressing plate and the partition member are moved to not protrude between the base plate and the main pressing plate. The main pressing plate moves close to the base plate to squeeze the blood bag, so that the buffy coat component is squeezed into the part of the blood bag located between the main pressing plate and the auxiliary pressing plate. Then the main pressing plate stops moving and remains in this position. Next, the partition member moves close to the main pressing plate to squeeze the blood bag onto the main pressing plate. The part of the blood bag located between the main pressing plate and the auxiliary pressing plate and the part located between the main pressing plate and the base plate are non - communicating, that is, the buffy coat component and the remaining component in the blood bag are separated. After that, the auxiliary pressing plate moves close to the main pressing plate to squeeze the blood bag, and the buffy coat component in the part of the blood bag located between the main pressing plate and the auxiliary pressing plate is squeezed out, thus realizing the separation operation of the buffy coat; the movement of the main pressing plate, the auxiliary pressing plate and the partition member can be driven by an electric device. Compared with manual operation, the labor intensity is low, and after separating the buffy coat and the remaining component and then squeezing the buffy coat out of the blood bag, it is not easy to have the situation of incomplete extrusion or extrusion of the remaining component, and the separation of the buffy coat component is more accurate;

[0028] 2. In this application, the first color sensor and the second color sensor are respectively set to detect the colors of the part of the blood bag between the substrate and the main pressing plate and the part between the auxiliary pressing plate and the main pressing plate. By using the different colors of the white film component and the remaining components, it is determined whether the white film is squeezed into the part of the blood bag between the auxiliary pressing plate and the main pressing plate. When starting the separation work, the separator is not protruded between the substrate and the main pressing plate. At this time, the white film component is located between the substrate and the main pressing plate inside the blood bag. When the main pressing plate presses the blood bag, the white film is squeezed towards the part between the auxiliary pressing plate and the main pressing plate. The color of the blood bag is detected by the first color sensor, so as to judge whether the white film is completely squeezed into the part of the blood bag between the auxiliary pressing plate and the main pressing plate. When the color of the white film in the part of the blood bag between the substrate and the main pressing plate disappears, a signal is sent to the drive system. After receiving the signal, the drive system drives the separator to move closer to the main pressing plate until the blood bag is separated into two non - communicating parts. At this time, the white film component and the remaining components are separated. Then, the auxiliary pressing plate is moved closer to the main pressing plate to squeeze out the white film component in the blood bag. The second color sensor is used to judge whether the white film component is completely squeezed out of the blood bag. After the white film is completely squeezed out, the color of the white film in the part of the blood bag between the main pressing plate and the auxiliary pressing plate disappears. At this time, the second color sensor sends a signal to the drive system, and the drive system drives the auxiliary pressing plate to move away from the main pressing plate and separate from the blood bag for subsequent work; the cooperation of the first color sensor and the second color sensor can ensure that the white film is completely squeezed out and the remaining components are not squeezed out, realizing the precise control of the white film separation work;

[0029] 3. In this application, by setting the first pressure sensor, when the separator moves closer to the main pressing plate and presses the blood bag against the main pressing plate, the pressure between the separator and the main pressing plate is detected by the first pressure sensor. When the pressure exceeds the set value, a signal is sent to the drive system that drives the main pressing plate, the separator and the auxiliary pressing plate to move, so that the separator stops moving. This can keep enough pressure between the separator and the main pressing plate to ensure that the blood bag is separated into two non - communicating parts by the separator, and the separator can play a good role in separating blood bags of different specifications or capacities;

[0030] 4. In this application, the separator is set to include a separation plate, and a slot adapted to the separation plate is opened on the main pressing plate. The blood bag is squeezed and deformed by the separation plate until it is embedded in the slot, so that the blood bag forms two non - communicating parts. The slot can provide space for the deformation of the blood bag. The cooperation of the slot and the separation plate has a better separation effect on the blood bag, ensuring that the white film and the remaining components are separated to avoid squeezing out the remaining components from the blood bag;

[0031] 5. In the present application, the sides of the main pressing plate and the substrate that are close to each other and the side of the auxiliary pressing plate close to the main pressing plate are set as parallel planes. The contact area between the planes and the blood bag is larger, and the extrusion process is more stable. Moreover, both the auxiliary pressing plate and the partition member can be moved to a position where they do not protrude between the substrate and the main pressing plate. During the initial operation, the auxiliary pressing plate can be moved to a position where the plane close to the main pressing plate is coplanar with the plane of the substrate close to the main pressing plate. The auxiliary pressing plate and the partition member will not hinder the movement of the main pressing plate towards the substrate, and the blood bag is supported by the auxiliary pressing plate and the substrate together, making the flow of blood components in the blood bag more stable, ensuring that the buffy coat component can flow between the auxiliary pressing plate and the main pressing plate;

[0032] 6. The buffy coat separation method of the present application uses the extrusion mechanism of a blood separator to separate the buffy coat. The movement of the main pressing plate, the auxiliary pressing plate, and the partition member can be driven by an electric device. Compared with manual operation, the labor intensity is low, and after separating the buffy coat and the remaining components and then squeezing the buffy coat out of the blood bag, it is not easy to have the situation of incomplete extrusion or squeezing out the remaining components, and the separation of the buffy coat component is more accurate; moreover, when the auxiliary pressing plate moves close to the main pressing plate to squeeze the part of the blood bag between the auxiliary pressing plate and the main pressing plate, the auxiliary pressing plate reciprocates multiple times until the buffy coat in the blood bag is completely squeezed out, ensuring that the buffy coat is completely squeezed out of the blood bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of the extrusion mechanism of a blood separator provided by an embodiment of the present utility model;

[0034] Figure 2 is a schematic structural diagram of the main pressing plate in the extrusion mechanism of a blood separator provided by an embodiment of the present utility model;

[0035] Figure 3 is a schematic structural diagram of another perspective of the extrusion mechanism of a blood separator provided by an embodiment of the present utility model;

[0036] Figure 4 is a schematic partial structural diagram of the drive system in the extrusion mechanism of a blood separator provided by an embodiment of the present utility model;

[0037] Figure 5 is a schematic diagram of the working state of the extrusion mechanism of a blood separator provided by an embodiment of the present utility model.

[0038] In the drawings, the list of components represented by each reference numeral is as follows:

[0039] 1. Substrate; 2. Main pressing plate; 21. Card slot; 22. Transparent cover plate; 3. Sub - pressing plate; 4. Partition plate; 5. Driving system; 51. Lead screw mechanism; 52. Servo motor; 53. Linear motor; 54. Connecting block; 6. First color sensor; 7. Second color sensor; 8. First pressure sensor; 9. First optoelectronic switch; 10. First trigger; 11. Second optoelectronic switch; 12. Third optoelectronic switch; 13. Second trigger; 14. Third trigger. Detailed implementation manner

[0040] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant attached drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0042] It can be understood that spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. can be used herein to describe the relationship between an element or feature shown in the figure and other elements or features. It should be understood that in addition to the orientation shown in the figure, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the attached drawing is flipped, the element or feature described as "under other elements" or "beneath it" or "under it" will be oriented "above" other elements or features. Therefore, the exemplary terms "under" and "below" can include both the upper and lower orientations. In addition, the device can also have other orientations (for example, rotated 90 degrees or other orientations), and the spatial description language used herein is accordingly interpreted.

[0043] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediate element. In the following embodiments, "connection", if there is an electrical signal or data transmission between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0044] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0045] Reference Figures 1-5 As shown, an embodiment of the present application provides a blood separator extrusion mechanism, including a base plate 1, a main pressure plate 2, an auxiliary pressure plate 3 and a partition, the base plate 1 and the main pressure plate 2 are connected and spaced apart in a first straight line direction, the main pressure plate 2 can move close to or away from the base plate 1 along the first straight line direction, and is suitable for squeezing the blood bag by moving the main pressure plate 2 close to the base plate 1; the auxiliary pressure plate 3 and the base plate 1 are spaced apart in a second straight line direction, the second straight line direction is perpendicular to the first straight line direction, the auxiliary pressure plate 3 can move close to or away from the main pressure plate 2 along the first straight line direction; the partition is arranged between the base plate 1 and the auxiliary pressure plate 3, the partition can move close to or away from the main pressure plate 2 along the first straight line direction, the partition is used to press the blood bag tightly on the main pressure plate 2, and make the part of the blood bag located between the base plate 1 and the main pressure plate 2 and the part located between the auxiliary pressure plate 3 and the main pressure plate 2 not connected to each other; wherein, it is suitable for squeezing the blood bag between the auxiliary pressure plate 3 and the main pressure plate 2 by moving the auxiliary pressure plate 3 close to the main pressure plate 2 when the blood bag is squeezed on the main pressure plate 2 by the partition, so as to squeeze the white film out of the blood bag.

[0046] Since the white film component in the blood bag is located above the remaining components, the blood bag opening needs to be facing upward when the white film component is squeezed out. Therefore, the auxiliary pressing plate 3 and the base plate 1 need to be spaced apart in the vertical direction during design, and the auxiliary pressing plate 3 is located above the base plate 1. In this embodiment, the second straight line direction is vertical for illustration and description.

[0047] Reference Figures 1-3 As shown, specifically, in order to make the blood bag evenly stressed when the main pressure plate 2, the base plate 1 and the auxiliary pressure plate 3 squeeze the blood bag, the side of the main pressure plate 2 and the base plate 1 close to each other and the side of the auxiliary pressure plate 3 close to the main pressure plate 2 are set as parallel planes. The contact area between the planes and the blood bag is large, and the blood bag is evenly stressed when squeezed, thereby avoiding the formation of white film and the mixing of residual components during squeezing. In this embodiment, the direction of the first straight line is set to be perpendicular to the plane of the side of the main pressure plate 2 close to the base plate 1, that is, the main pressure plate 2 can be moved perpendicular to the plane of the side of the base plate 1 close to the main pressure plate 2 or away from the base plate 1, thereby stably squeezing the blood bag. In other embodiments, the side of the main pressure plate 2 and the base plate 1 close to each other and the side of the auxiliary pressure plate 3 close to the main pressure plate 2 can also be designed according to the shape of the blood bag to ensure that the blood bag is evenly stressed when squeezed.

[0048] Reference Figure 1 andFigure 3 As shown, further, the separator is provided to include a separator plate 4. The separator plate 4 is perpendicular to the second linear direction, that is, in this embodiment, the separator plate 4 is horizontally arranged. The shape of the side of the separator plate 4 in contact with the main pressing plate 2 is designed according to the shape of the side of the main pressing plate 2 close to the substrate 1, so that the separator plate 4 and the main pressing plate 2 can cooperate to separate the blood bag into two non - communicating parts. In this embodiment, the side of the separator plate 4 close to the main pressing plate 2 is set as a straight line parallel to the upper plane of the main pressing plate 2.

[0049] Referring to Figures 1-2 As shown, further, a clamping groove 21 adapted to the separator plate 4 is opened on the side of the main pressing plate 2 close to the separator plate 4. It is suitable to squeeze and deform the blood bag through the separator plate 4 until it is embedded in the clamping groove 21, so that the blood bag forms two non - communicating parts. Specifically, the cross - section of the clamping groove 21 on the main pressing plate 2 is set as semi - circular or arc - shaped. Correspondingly, the side of the separator plate 4 close to the main pressing plate 2 is set as semi - circular or arc - shaped and adapted to the clamping groove 21. The clamping groove 21 can provide space for the deformation of the blood bag. When the clamping groove 21 is squeezed and deformed by the separator plate 4 until it is embedded in the clamping groove 21, the blood bag bends at the deformation position, which can make the separation effect of the two parts of the blood bag better. It can avoid the two separated parts of the blood bag being connected under the pressure when squeezing the white film part of the blood bag later, and squeeze out the remaining components from the blood bag, realizing the precise separation of the white film component.

[0050] During operation, place the blood bag between the main pressing plate 2 and the substrate 1 with the blood bag opening facing upwards. The main pressing plate 2 presses the blood bag close to the substrate 1. The white film component is squeezed towards the bag opening. When the white film component is above the separator plate 4, that is, between the main pressing plate 2 and the auxiliary pressing plate 3, the separator plate 4 moves close to the main pressing plate 2 to press the blood bag on the main pressing plate 2. At this time, the parts of the blood bag above and below the separator plate 4 are non - communicating. The white film is in the part of the blood bag above the separator plate 4, and then the auxiliary pressing plate 3 moves close to the main pressing plate 2 to squeeze the blood bag to squeeze out the white film.

[0051] Referring to Figure 1 and Figures 3-4 As shown, the movement of the main pressing plate 2, the auxiliary pressing plate 3 and the separator plate 4 is controlled by a driving system 5. The driving system 5 includes a first driving mechanism for driving the movement of the main pressing plate 2, a second driving mechanism for driving the movement of the separator plate 4 and a third driving mechanism for driving the movement of the auxiliary pressing plate 3. Among them, the moving distance of the main pressing plate 2 needs to be precisely controlled. Therefore, the first driving mechanism adopts a lead screw mechanism 51 and uses a servo motor 52 as the power. The second driving mechanism and the third driving mechanism can adopt a linear motor 53 to realize the electric control of the movement of the main pressing plate 2, the auxiliary pressing plate 3 and the separator plate 4.

[0052] Referring to Figure 1 and Figures 3-4As shown in the figure, specifically, when designing a blood separator, one side wall of the blood separator is set for installing the extrusion mechanism. The substrate 1 is fixed on the outer wall of this side wall, and holes are provided on this side wall for the partition plate 4 and the auxiliary pressing plate 3 to pass through, so that the partition plate 4 and the auxiliary pressing plate 3 can move to not protrude between the substrate 1 and the main pressing plate 2. At the same time, a hook for hanging the blood bag is provided above the auxiliary pressing plate 3 on the blood separator. The driving system 5 is arranged inside the blood separator. The first driving mechanism, the second driving mechanism, and the third driving mechanism of the driving system 5 are correspondingly connected to the main pressing plate 2, the partition plate 4, and the auxiliary pressing plate 3 to realize the function of driving the main pressing plate 2, the auxiliary pressing plate 3, and the partition plate 4 to move. In this embodiment, in the first driving mechanism, the slider of the screw mechanism 51 is connected with a connecting rod parallel to the first straight line direction. The connecting rod passes through the side wall of the blood separator and is connected to the main pressing plate 2, so that when the slider of the screw mechanism 51 moves, the main pressing plate 2 is driven to move through the connecting rod. The output shafts of the linear motors 53 of the second driving mechanism and the third driving mechanism are both connected with connecting blocks 54. The partition plate 4 and the auxiliary pressing plate 3 are respectively fixed to the two connecting blocks 54, so that when the two linear motors 53 are started, the partition plate 4 and the auxiliary pressing plate 3 are respectively driven to move through the connecting blocks 54.

[0053] Referring to Figure 1 As shown in the figure, further, to realize the automatic control of the whole buffy coat separation process, a first color sensor 6 is provided on the substrate 1, which is used to detect the color of the part of the blood bag between the substrate 1 and the main pressing plate 2. When the main pressing plate 2 moves close to the substrate 1 to squeeze the blood bag, when the buffy coat color of the part of the blood bag between the substrate 1 and the main pressing plate 2 disappears, the first color sensor 6 sends a signal to the driving system 5 to make the main pressing plate 2 stop moving and make the partition plate 4 move close to the main pressing plate 2. A second color sensor 7 is provided on the auxiliary pressing plate 3, which is used to detect the color of the part of the blood bag between the auxiliary pressing plate 3 and the main pressing plate 2. When the auxiliary pressing plate 3 moves close to the main pressing plate 2 to squeeze the blood bag, when the buffy coat color of the part of the blood bag between the main pressing plate 2 and the auxiliary pressing plate 3 disappears, the second color sensor 7 sends a signal to the driving system 5 to make the auxiliary pressing plate 3 move away from the main pressing plate 2.

[0054] In the initial stage of the separation work, it is necessary to move the partition plate 4 and the auxiliary pressing plate 3 to not protrude between the main pressing plate 2 and the substrate 1 to avoid affecting the extrusion process of the main pressing plate 2 on the blood bag. By detecting the color of the part of the blood bag between the substrate 1 and the main pressing plate 2 with the first color sensor 6, it can be judged whether the buffy coat is extruded above the partition plate 4, that is, between the main pressing plate 2 and the auxiliary pressing plate 3. When the buffy coat color of the part of the blood bag between the substrate 1 and the main pressing plate 2 disappears, it proves that the buffy coat is extruded between the main pressing plate 2 and the auxiliary pressing plate 3. At this time, a signal is sent to the driving system 5, and the driving system 5 drives the main pressing plate 2 to stop moving and maintain its position, and makes the partition plate 4 move close to the main pressing plate 2 to separate the blood bag into two parts, that is, to separate the buffy coat component and the remaining component.

[0055] Referring to Figures 3-4 As shown, to control the pressure between the separator plate 4 and the main pressing plate 2, a first pressure sensor 8 is connected to the separator plate 4. When the separator plate 4 moves close to the main pressing plate 2 to press the blood bag against the main pressing plate 2, the pressure between the separator plate 4 and the main pressing plate 2 is detected by the first pressure sensor 8, and when the pressure exceeds the set value, a signal is sent to the drive system 5 that drives the main pressing plate 2, the separator plate 4, and the auxiliary pressing plate 3 to move, causing the separator plate 4 to stop moving. Specifically, the first pressure sensor 8 is installed between the output shaft of the linear motor 53 of the second drive mechanism and the corresponding connecting block 54. When the linear motor 53 is started, the driving force is transmitted to the separator plate 4 through the output shaft, the pressure sensor, and the connecting block 54, thereby driving the separator plate 4 to move. When the separator plate 4 moves close to the main pressing plate 2 to squeeze the blood bag against the main pressing plate 2, the pressure sensor detects that the pressure value gradually increases. When the pressure value exceeds the set value, the linear motor 53 stops operating, causing the separator plate 4 to maintain its position and maintain sufficient pressure between the separator plate 4 and the main pressing plate 2 to ensure that the two parts of the blood bag are not connected to each other.

[0056] The above setting is because for blood bags of different specifications or capacities, the distance that the main pressing plate 2 moves close to the substrate 1 is different, that is, the distance between the main pressing plate 2 and the substrate 1 when the main pressing plate 2 stops moving each time is different. Therefore, each time the distance that the separator plate 4 moves close to the main pressing plate 2 also needs to be adjusted accordingly to ensure that there is sufficient pressure to press the blood bag. Therefore, by detecting the pressure between the separator plate 4 and the main pressing plate 2 with the first pressure sensor 8 to control the moving distance of the separator plate 4, it can be ensured that the separator plate 4 generates sufficient pressure on the blood bag.

[0057] After the white film component and the remaining component in the blood bag are separated, the white film can be squeezed out of the blood bag. That is, after the separator plate 4 squeezes the blood bag against the main pressing plate 2 and the corresponding linear motor 53 of the third drive mechanism stops operating, the linear motor 53 of the third drive mechanism is started to drive the auxiliary pressing plate 3 to move close to the main pressing plate 2. The auxiliary pressing plate 3 squeezes the part of the blood bag located between the main pressing plate 2 and the auxiliary pressing plate 3, squeezing the white film out of the blood bag. During this process, the second color sensor 7 detects the color of this part of the blood bag to determine whether the white film has been completely squeezed out. When the color of the white film in the part of the blood bag located between the main pressing plate 2 and the auxiliary pressing plate 3 disappears, it means that the white film has been completely squeezed out. After the white film has been completely squeezed out, the drive system 5 drives the auxiliary pressing plate 3 to move away from the main pressing plate 2 to the initial position that does not protrude between the main pressing plate 2 and the substrate 1 and stops.

[0058] Referring to Figures 3-4As shown in the figure, in order to control the moving distance of the auxiliary pressing plate 3 approaching the main pressing plate 2, a first optoelectronic switch 9 is provided on the partition plate 4, and a first triggering member 10 for triggering the first optoelectronic switch 9 is provided on the auxiliary pressing plate 3. When the partition plate 4 presses the blood bag against the main pressing plate 2, the auxiliary pressing plate 3 can move close to the main pressing plate 2 until the first triggering member 10 triggers the first optoelectronic switch 9. When the first optoelectronic switch 9 is triggered, the auxiliary pressing plate 3 stops moving. Specifically, the first optoelectronic switch 9 is installed on the connecting block 54 connected to the partition plate 4, and the first triggering member 10 is installed on the connecting block 54 connected to the auxiliary pressing plate 3. For blood bags of different specifications or capacities, the distance between the main pressing plate 2 and the substrate 1 when the main pressing plate 2 stops is different, the moving distance of the partition plate 4 approaching the main pressing plate 2 is different, and the moving distance of the auxiliary pressing plate 3 approaching the main pressing plate 2 also needs to be adjusted to ensure the extrusion effect on the blood bag. Therefore, by setting the cooperation of the first optoelectronic switch 9 and the first triggering member 10, and taking the position of the partition plate 4 as a reference to control the moving distance of the auxiliary pressing plate 3 approaching the main pressing plate 2, it can ensure that the auxiliary pressing plate 3 has a good extrusion effect on the blood bag to completely extrude the white film.

[0059] During actual operation, it may occur that when the auxiliary pressing plate 3 moves close to the main pressing plate 2 to the stop state, the white film in the blood bag is not completely extruded, and the second color sensor 7 can still detect the color of the white film and judge that the white film is not completely extruded. According to the signal of the second color sensor 7, the driving system 5 drives the auxiliary pressing plate 3 to move away from the main pressing plate 2 for a certain distance, and then drives the auxiliary pressing plate 3 to move close to the main pressing plate 2 again. This process is repeated multiple times until the last time the auxiliary pressing plate 3 moves close to the main pressing plate 2 to completely extrude the white film. When the driving system 5 receives the signal of the second color sensor 7, it drives the auxiliary pressing plate to move away from the main pressing plate 2 and reset to the initial position where it does not protrude between the main pressing plate 2 and the substrate 1.

[0060] After the auxiliary pressing plate 3 is reset to the initial position where it does not protrude between the main pressing plate 2 and the substrate 1, the driving system 5 drives the partition plate 4 to move away from the main pressing plate 2 to the initial position where it does not protrude between the main pressing plate 2 and the substrate 1. Finally, the driving system 5 drives the main pressing plate 2 to move away from the substrate 1 to the initial position, and the blood bag is removed to complete the white film separation work of the blood bag. Specifically, a second photoelectric switch 11 and a third photoelectric switch 12 are respectively provided on the linear motors 53 of the second driving mechanism and the third driving mechanism. A second trigger 13 for triggering the second photoelectric switch 11 is connected to the partition plate 4, and a third trigger 14 for triggering the third photoelectric switch 12 is connected to the auxiliary pressing plate 3. When the partition plate 4 moves away from the main pressing plate 2 to the initial position where it does not protrude between the main pressing plate 2 and the substrate 1, the second trigger 13 triggers the second photoelectric switch 11. When the auxiliary pressing plate 3 moves away from the main pressing plate 2 to the initial position where it does not protrude between the main pressing plate 2 and the substrate 1, the third trigger 14 triggers the third photoelectric switch 12. Specifically, the second trigger 13 is fixed on a connecting block 54 connected to the partition plate 4, and the third trigger 14 is fixed on a connecting block 54 connected to the auxiliary pressing plate 3. In this embodiment, when the partition plate 4 and the auxiliary pressing plate 3 move to the initial position, the side of the partition plate 4 close to the main pressing plate 2 and the side of the auxiliary pressing plate 3 close to the main pressing plate 2 are flush with the side of the substrate 1 close to the main pressing plate 2.

[0061] Further, a second pressure sensor is provided on the main pressing plate 2, which is used to detect the pressure between the main pressing plate 2 and the blood bag. The second pressure sensor is provided on the side of the main pressing plate 2 close to the substrate 1. Since in the initial stage when the main pressing plate 2 moves close to the substrate 1, the main pressing plate 2 is not in contact with the blood bag, that is, there is a blank stroke of the main pressing plate 2, and the value of the second pressure sensor is zero. At this time, the driving system 5 receives the signal of the second pressure sensor and fast-forwards this blank stroke. When the main pressing plate 2 contacts and squeezes the blood bag, the blood bag needs to be slowly squeezed. When the main pressing plate 2 contacts the blood bag, the value of the second pressure sensor changes, and the driving system 5 receives the signal and slowly drives the main pressing plate 2 to move, so as to slowly squeeze the blood bag and slowly squeeze the white film component towards the bag mouth.

[0062] Further, a lighting lamp is provided on the side of the main pressing plate 2 close to the substrate 1, which provides illumination for the first color sensor 6 and the second color sensor 7 to improve the detection accuracy. When designing, a cavity for installing the lighting lamp is opened on the side of the main pressing plate 2 close to the substrate 1. The lighting lamp is installed in the cavity, and a transparent cover plate 22 is provided at the opening of the cavity to protect the lighting lamp and ensure the lighting effect. The transparent cover plate 22 keeps the side of the main pressing plate 2 close to the substrate 1 flat, so that the blood bag is evenly stressed when the main pressing plate 2 squeezes the blood bag.

[0063] This embodiment also provides a white film separation method, which uses the extrusion mechanism of the blood separator as described above, including:

[0064] Make the second linear direction vertical and the auxiliary pressing plate 3 be located above the substrate 1. Place the blood bag between the main pressing plate 2 and the substrate 1, and make the opening of the blood bag face upward.

[0065] Specifically, during actual operation, since the white film component in the blood bag is located above the remaining components, when extruding the white film component, the opening of the blood bag needs to face upward. Therefore, when using the extrusion mechanism of the blood separator, the auxiliary pressing plate 3 needs to be located above the substrate 1, and when the blood bag is placed between the main pressing plate 2 and the substrate 1, the opening faces upward. In the initial state, move the auxiliary pressing plate 3 and the partition plate 4 until the side of the partition plate 4 close to the main pressing plate 2 and the side of the auxiliary pressing plate 3 close to the main pressing plate 2 are flush with the side of the substrate 1 close to the main pressing plate 2, and then place the blood bag between the main pressing plate 2 and the substrate 1.

[0066] The main pressing plate 2 moves close to the substrate 1 to squeeze the blood bag. When the white film component is squeezed to the part of the blood bag between the main pressing plate 2 and the auxiliary pressing plate 3, the main pressing plate 2 stops moving and remains in this position.

[0067] Specifically, the first driving mechanism is started to drive the main pressing plate 2 to move close to the substrate 1. According to the feedback signal of the second pressure sensor, the moving speed of the main pressing plate 2 is controlled. When the main pressing plate 2 contacts and squeezes the blood bag, the white film component is squeezed upward. Whether there is white film in the part of the blood bag between the main pressing plate 2 and the substrate 1 is judged by the feedback signal of the first color sensor 6. When the color of the white film in the part of the blood bag between the main pressing plate 2 and the substrate 1 disappears, the driving system 5 controls the servo motor 52 to stop running according to the feedback signal of the first color sensor 6, and the main pressing plate 2 stops moving and remains in position.

[0068] The separator moves close to the main pressing plate 2 until the blood bag is pressed tightly on the main pressing plate 2 and the part of the blood bag between the substrate 1 and the main pressing plate 2 and the part between the auxiliary pressing plate 3 and the main pressing plate 2 are not connected to each other.

[0069] Specifically, after the main pressing plate 2 stops moving, the driving system 5 drives the partition plate 4 to move close to the main pressing plate 2. According to the feedback signal of the second pressure sensor, when the pressure of the second pressure sensor exceeds the set value, the driving system 5 controls the linear motor 53 of the second driving mechanism to stop running, and the partition plate 4 stops moving and remains in position. At this time, the blood bag is pressed on the main pressing plate 2 by the partition plate 4, the part of the blood bag between the main pressing plate 2 and the auxiliary pressing plate 3 and the part between the main pressing plate 2 and the substrate 1 are not connected to each other, and the white film in the blood bag is located between the main pressing plate 2 and the auxiliary pressing plate 3.

[0070] The auxiliary pressing plate 3 moves close to the main pressing plate 2 to squeeze the part of the blood bag between the auxiliary pressing plate 3 and the main pressing plate 2, and squeezes the white film out of the blood bag.

[0071] Specifically, when the partition plate 4 stops moving, the drive system 5 controls the auxiliary pressing plate 3 to move closer to the main pressing plate 2. The drive system 5 controls the auxiliary pressing plate 3 to stop moving according to the feedback signal of the first optoelectronic switch 9. That is, when the auxiliary pressing plate 3 moves closer to the main pressing plate 2 to squeeze the blood bag, when the auxiliary pressing plate 3 moves to trigger the first optoelectronic switch 9 by the first trigger member 10, the drive system 5 controls the auxiliary pressing plate 3 to stop moving. According to the feedback signal of the second color sensor 7, when the color of the white film in the part of the blood bag between the main pressing plate 2 and the auxiliary pressing plate 3 does not disappear, the white film is not completely extruded. At this time, the drive system 5 drives the auxiliary pressing plate 3 to move away from the main pressing plate 2 by a certain distance, and then makes the auxiliary pressing plate 3 move closer to the main pressing plate 2 again to squeeze the blood bag; repeat the above process multiple times to make the auxiliary pressing plate 3 reciprocate multiple times to squeeze the blood bag until the color of the white film in the part of the blood bag between the main pressing plate 2 and the auxiliary pressing plate 3 disappears. The second color sensor 7 feeds back the signal to the drive system 5, and the drive system 5 controls the auxiliary pressing plate 3 to move away from the main pressing plate 2 to the initial position. After the auxiliary pressing plate 3 moves to the initial position, the third optoelectronic switch 12 is triggered. The drive system 5 controls the auxiliary pressing plate 3 to stop moving according to the feedback signal of the third optoelectronic switch 12, and drives the partition plate 4 to move away from the main pressing plate 2 to the initial position. The second optoelectronic switch 11 is triggered, and the drive system 5 controls the partition plate 4 to stop moving according to the feedback signal of the second optoelectronic switch 11. Finally, the drive system 5 drives the main pressing plate 2 to move away from the substrate 1 to the initial position, and the blood bag is taken off to complete the white film separation work of the blood bag.

[0072] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A blood separator squeezing mechanism, characterized in that: include: base(1); A main pressing plate (2) connected to the base plate (1) and spaced apart from the base plate (1) in a first straight line direction, the main pressing plate (2) being movable towards or away from the base plate (1) along the first straight line direction, and being suitable for squeezing a blood bag by moving the main pressing plate (2) towards the base plate (1); A secondary pressing plate (3) is spaced apart from the base plate (1) in a second straight line direction, the second straight line direction is perpendicular to the first straight line direction, and the secondary pressing plate (3) can move toward or away from the main pressing plate (2) along the first straight line direction; a partition, which is arranged between the base plate (1) and the auxiliary pressure plate (3), and the partition can move along a first straight line direction toward or away from the main pressure plate (2), and the partition is used to press the blood bag onto the main pressure plate (2) and make the blood bag between the base plate (1) and the main pressure plate (2) and between the auxiliary pressure plate (3) and the main pressure plate (2) disconnected from each other; Wherein, when the blood bag is pressed onto the main pressure plate (2) by the partition, the auxiliary pressure plate (3) is moved close to the main pressure plate (2) to squeeze the blood bag between the auxiliary pressure plate (3) and the main pressure plate (2) so as to squeeze the white film out of the blood bag.

2. The blood separator squeezing mechanism according to claim 1, characterized in that: The substrate (1) is provided with a first color sensor (6) for detecting the color of the portion of the blood bag located between the substrate (1) and the main pressure plate (2). The first color sensor (6) is suitable for sending a signal to a driving system (5) that drives the main pressure plate (2), the partition and the auxiliary pressure plate (3) to stop the main pressure plate (2) from moving and to move the partition closer to the main pressure plate (2) when the white film color of the portion of the blood bag located between the substrate (1) and the main pressure plate (2) disappears when the main pressure plate (2) moves close to the substrate (1) to squeeze the blood bag.

3. The blood separator squeezing mechanism according to claim 1, characterized in that: The auxiliary pressure plate (3) is provided with a second color sensor (7) for detecting the color of the portion of the blood bag located between the auxiliary pressure plate (3) and the main pressure plate (2). The second color sensor is suitable for sending a signal to a driving system (5) that drives the main pressure plate (2), the partition and the auxiliary pressure plate (3) to move, so that the auxiliary pressure plate (3) moves away from the main pressure plate (2), when the color of the white film of the blood bag located between the main pressure plate (2) and the auxiliary pressure plate (3) disappears when the auxiliary pressure plate (3) moves close to the main pressure plate (2) to squeeze the blood bag.

4. The blood separator squeezing mechanism according to claim 1, characterized in that; The partition is provided with a first pressure sensor (8), which is suitable for detecting the pressure between the partition and the main pressure plate (2) through the first pressure sensor (8) when the partition moves close to the main pressure plate (2) to press the blood bag against the main pressure plate (2), and sending a signal to the driving system (5) that drives the main pressure plate (2), the partition and the auxiliary pressure plate (3) to stop the movement of the partition when the pressure exceeds a set value.

5. The blood separator squeezing mechanism according to claim 1, characterized in that: The partition is provided with a first photoelectric switch (9), and the auxiliary pressure plate (3) is provided with a first triggering member (10) for triggering the first photoelectric switch (9). When the partition presses the blood bag onto the main pressure plate (2), the auxiliary pressure plate (3) can move close to the main pressure plate (2) to the first triggering member (10) to trigger the first photoelectric switch (9). When the first photoelectric switch (9) is triggered, a signal is sent to a driving system (5) that drives the main pressure plate (2), the partition and the auxiliary pressure plate (3) to move, so that the auxiliary pressure plate (3) stops moving.

6. The blood separator squeezing mechanism according to claim 1, characterized in that: The partition comprises a partition plate (4), and the partition plate (4) is perpendicular to the second straight line direction.

7. The blood separator squeezing mechanism according to claim 6, characterized in that: The main pressure plate (2) is provided with a slot (21) adapted to the partition plate (4) on one side thereof close to the partition plate (4), and is suitable for squeezing and deforming the blood bag through the partition plate (4) until the blood bag is embedded in the slot (21), so that the blood bag is formed into two parts that are not connected to each other.

8. The blood separator squeezing mechanism according to claim 1, characterized in that: The side where the main pressure plate (2) and the base plate (1) are close to each other and the side where the auxiliary pressure plate (3) is close to the main pressure plate (2) are parallel planes, and the auxiliary pressure plate (3) and the partition can be moved to a position where they do not protrude between the base plate (1) and the main pressure plate (2).

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