Three-plate extrusion control system of blood separator

Abstract

The utility model relates to a three-plate extrusion control system of a blood separator, which comprises a first driving mechanism, a second driving mechanism and a three-plate extrusion control mechanism, the second driving mechanism drives the partition plate to move; the third driving mechanism drives the auxiliary pressing plate to move; the control module controls the first driving mechanism, the second driving mechanism and the third driving mechanism to operate; the first color sensor detects the color of the part, located between the main pressing plate and the supporting wall, of the blood bag, is connected with the control module and is suitable for controlling the control module to control the blood bag according to a signal of the first color sensor when the white film color of the part, located between the main pressing plate and the supporting wall, of the blood bag disappears in the process that the first driving mechanism drives the main pressing plate to move close to the supporting wall; and controlling the first driving mechanism to stop running, and controlling the second driving mechanism to run to drive the partition plate to move close to the main pressing plate. According to the device, the albuginea hair formation and the residual components can be accurately separated, so that the albuginea can be completely extruded out, the residual components are prevented from being extruded out, and the albuginea components are accurately separated.

Description

Technical Field

[0001] The utility model relates to the field of blood separation technology, and particularly relates to a three-plate extrusion control system for 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 of components is respectively extruded from the whole blood bag and input into the collection bag corresponding to the component through the blood component separator, so as to achieve the purpose of component separation.

[0003] At present, in a blood separator for separating the buffy coat in blood, the extrusion mechanism mainly consists of a main pressing plate, a secondary pressing plate, a partition plate, and a support wall on the separator body for supporting the blood bag. The secondary pressing plate, the partition plate, and the support wall are sequentially distributed from top to bottom in the vertical direction, and the main pressing plate is spaced from the support wall in the horizontal direction. The main pressing plate can move closer to or away from the support wall, and both the secondary pressing plate and the partition plate can move closer to or away from the main pressing plate. The specific operation method is as follows: The blood bag is placed between the main pressing plate and the support wall with the bag mouth facing up. The main pressing plate moves closer to the support wall to squeeze the blood bag. When the buffy coat component in the blood bag is squeezed above the partition plate, the main pressing plate stops moving. Then the partition plate moves closer to the main pressing plate to press the blood bag against the main pressing plate, so that the two parts of the blood bag above and below the partition plate are not connected to each other. At this time, all the buffy coat components are located in the part of the blood bag above the partition plate. After that, the secondary pressing plate moves closer to the main pressing plate to squeeze the part of the blood bag above the partition plate, and the buffy coat is squeezed out of the blood bag. In this way, the precise separation of the buffy coat component is realized.

[0004] In the actual operation process, to ensure the precise separation of the buffy coat, when the boundary line between the buffy coat component and the remaining components in the blood bag is flush with the partition plate, it is necessary to control the main pressing plate to stop moving, and control the partition plate to move closer to the main pressing plate to separate the blood bag into two non-connected parts, so as to separate the buffy coat component and the remaining components, ensure that the buffy coat component is completely extruded and the remaining components are not extruded. At present, the position of the boundary line between the buffy coat component and the remaining components needs to be judged by the operator with the naked eye, and the operator controls the stop of the main pressing plate and the movement of the partition plate through the drive system. Due to the large error of visual judgment, the partition plate cannot accurately separate the buffy coat component and the remaining components, and it is difficult to accurately separate the buffy coat. Summary of the Utility Model

[0005] Based on the above description, the utility model provides a three-plate extrusion control system for a blood separator to solve the problem that in the related technology, the partition plate cannot accurately separate the buffy coat component and the remaining components, and it is difficult to accurately separate the buffy coat.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] This application provides a three-plate extrusion control system for a blood separator, and the technical solution adopted is as follows:

[0008] A three-plate extrusion control system for a blood separator, comprising:

[0009] A first driving mechanism, which is connected to the main pressing plate for driving the main pressing plate to move;

[0010] A second driving mechanism, which is connected to the partition plate for driving the partition plate to move;

[0011] A third driving mechanism, which is connected to the auxiliary pressing plate for driving the auxiliary pressing plate to move;

[0012] A control module, which is used to control the operation of the first driving mechanism, the second driving mechanism and the third driving mechanism;

[0013] A first color sensor, which is used to detect the color of the part of the blood bag between the main pressing plate and the support wall. The first color sensor is connected to the control module. When the white film color of the part of the blood bag between the main pressing plate and the support wall disappears during the process of the first driving mechanism driving the main pressing plate to move closer to the support wall, the control module controls the first driving mechanism to stop running according to the signal of the first color sensor, and controls the second driving mechanism to run to drive the partition plate to move closer to the main pressing plate.

[0014] Preferably, it further includes a first pressure sensor, which is connected to the partition plate for detecting the pressure between the partition plate and the main pressing plate. The first pressure sensor is connected to the control module. When the second driving mechanism drives the partition plate to move closer to the main pressing plate, the control module controls the second driving mechanism to stop running when the pressure exceeds the set value according to the pressure signal of the first pressure sensor, and controls the third driving mechanism to run to drive the auxiliary pressing plate to move closer to the main pressing plate.

[0015] Preferably, it further includes a first photoelectric switch and a first trigger. The first photoelectric switch is connected to the partition plate and connected to the control module. The first trigger is connected to the auxiliary pressing plate. When the partition plate presses the blood bag on the main pressing plate, the auxiliary pressing plate can move to trigger the first photoelectric switch when moving closer to the main pressing plate. When the first photoelectric switch is triggered, it sends a signal to the control module, and the control module controls the third driving mechanism to stop running when receiving the signal of the first photoelectric switch.

[0016] Preferably, it further includes a second color sensor, which is used to detect the color of the part of the blood bag between the main pressing plate and the auxiliary pressing plate. The second color sensor is connected to the control module. The control module controls the third driving mechanism to drive the auxiliary pressing plate to move away from the main pressing plate when the white film color of the part of the blood bag between the main pressing plate and the auxiliary pressing plate disappears according to the signal of the second color sensor.

[0017] Preferably, it further includes a second optoelectronic switch and a second trigger. The second optoelectronic switch is connected to the separator body, and the second trigger is connected to the partition plate. The second optoelectronic switch is connected to the control module. When the partition plate moves away from the main pressing plate from the state of squeezing the blood bag, the partition plate can move to the second trigger to trigger the second optoelectronic switch. When the second optoelectronic switch is triggered, it sends a signal to the control module. When the control module receives the signal of the second optoelectronic switch, it controls the second driving mechanism to stop running.

[0018] Preferably, it further includes a third optoelectronic switch and a third trigger. The third optoelectronic switch is connected to the separator body, and the third trigger is connected to the auxiliary pressing plate. The third optoelectronic switch is connected to the control module. When the auxiliary pressing plate moves away from the main pressing plate from the state of squeezing the blood bag, the auxiliary pressing plate can move to the third trigger to trigger the third optoelectronic switch. When the third optoelectronic switch is triggered, it sends a signal to the control module. When the control module receives the signal of the third optoelectronic switch, it controls the third driving mechanism to stop running.

[0019] Preferably, it further includes a second pressure sensor, which is connected to the main pressing plate for detecting the pressure between the main pressing plate and the blood bag. The second pressure sensor is connected to the control module. When the first driving mechanism drives the main pressing plate to move closer to the support wall, the control module, according to the pressure signal of the second pressure sensor, when the pressure exceeds the set value, controls the speed at which the first driving mechanism drives the main pressing plate to move closer to the support wall to decrease.

[0020] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0021] 1. In the present application, the first driving mechanism, the second driving mechanism and the third driving mechanism are set to drive the main pressing plate, the partition plate and the auxiliary pressing plate to move respectively, and are controlled by the control module. By setting the first color sensor to detect the color of the part of the blood bag between the support wall and the main pressing plate, and using the different colors of the white film component and the remaining components, it is judged whether the white film is squeezed into the part of the blood bag between the auxiliary pressing plate and the main pressing plate. When the main pressing plate squeezes the blood bag, the white film is squeezed towards the part of the blood bag between the auxiliary pressing plate and the main pressing plate. When the white film is completely squeezed into the part of the blood bag between the auxiliary pressing plate and the main pressing plate, the color of the white film in the part of the blood bag between the main pressing plate and the support wall disappears. At this time, the drive system, according to the signal of the first color sensor, controls the first driving mechanism to stop running, and controls the second driving mechanism to run to drive the partition plate to move closer to the main pressing plate until the partition plate squeezes the blood bag against the main pressing plate, separating the white film component and the remaining components, which can ensure the precise separation of the white film component and the remaining components, enable the white film to be completely extruded and avoid extruding the remaining components, and achieve the precise separation of the white film;

[0022] 2. In this application, by setting the first pressure sensor, when the partition plate moves close to the main pressing plate and presses the blood bag against the main pressing plate, the pressure between the partition plate and the main pressing plate is detected by the first pressure sensor. According to the signal of the first pressure sensor, the control module stops the operation of the second driving mechanism when the pressure exceeds the set value, the partition plate stops moving and maintains sufficient pressure with the main pressing plate to ensure that the blood bag is separated into two non - communicating parts by the partition plate; and for blood bags of different specifications or capacities, the distance between the main pressing plate and the support wall is different each time the main pressing plate stops moving, and the distance that the partition plate moves close to the main pressing plate also needs to be adjusted accordingly to ensure sufficient pressure to press the blood bag. Therefore, by detecting the pressure between the partition plate and the main pressing plate with the first pressure sensor to control the moving distance of the partition plate, it can be ensured that the partition plate can generate sufficient pressure on blood bags of different specifications or capacities;

[0023] 3. In this application, by setting the first optoelectronic switch and the first trigger part, for blood bags of different specifications or capacities, the distance between the main pressing plate and the support wall is different when the main pressing plate stops, and the distance that the partition plate moves close to the main pressing plate is different, and the distance that the auxiliary pressing plate moves close to the main pressing plate also needs to be adjusted to ensure the extrusion effect on the blood bag. Therefore, by setting the first optoelectronic switch and the first trigger part to cooperate and controlling the distance that the auxiliary pressing plate moves close to the main pressing plate based on the position of the partition plate, it can be ensured that the auxiliary pressing plate can produce a good extrusion effect on the blood bag to completely extrude the white film. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the three - plate extrusion control system of the blood separator provided by the embodiment of the present utility model;

[0025] Figure 2 is a schematic structural diagram of the second driving mechanism and the third driving mechanism in the three - plate extrusion control system of the blood separator provided by the embodiment of the present utility model.

[0026] In the drawings, the list of components represented by each reference numeral is as follows:

[0027] 1. Main pressing plate; 2. Support wall; 3. Partition plate; 4. Auxiliary pressing plate; 5. First driving mechanism; 6. Second driving mechanism; 7. Third driving mechanism; 8. Lead screw mechanism; 9. Servo motor; 10. Linear motor; 11. Connecting block; 12. First color sensor; 13. First pressure sensor; 14. First optoelectronic switch; 15. First trigger part; 16. Second color sensor; 17. Second optoelectronic switch; 18. Second trigger part; 19. Third optoelectronic switch; 20. Third trigger part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To facilitate the understanding of this application, the following will provide a more comprehensive description of this application with reference to the relevant drawings. Embodiments of this application are shown in the drawings. However, this 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 this application more thorough and comprehensive.

[0029] 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 specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0030] 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 figure is flipped, an 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 may also include other orientations (such as rotating 90 degrees or other orientations), and the spatial descriptors used herein are accordingly interpreted.

[0031] 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 a transmission of electrical signals or data between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0032] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms "comprise / include" or "have" etc. specify the presence of the 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.

[0033] Refer to Figure 1-2As shown in the figure, an embodiment of the present application provides a three-plate extrusion control system for a blood separator, including a first driving mechanism 5, a second driving mechanism 6, a third driving mechanism 7, and a control module. The first driving mechanism 5 is connected to the main pressing plate 1 to drive the main pressing plate 1 to move. The second driving mechanism 6 is connected to the partition plate 3 to drive the partition plate 3 to move. The third driving mechanism 7 is connected to the auxiliary pressing plate 4 to drive the auxiliary pressing plate 4 to move. The control module is used to control the operation of the first driving mechanism 5, the second driving mechanism 6, and the third driving mechanism 7.

[0034] Referring to Figure 1-2 As shown in the figure, specifically, the first driving mechanism 5 can adopt a lead screw driving mechanism powered by a servo motor 9. Both the second driving mechanism 6 and the third driving mechanism 7 can adopt linear motors 10. When installing, the first driving mechanism 5, the second driving mechanism 6, and the third driving mechanism 7 are installed corresponding to the moving directions of the main pressing plate 1, the partition plate 3, and the auxiliary pressing plate 4. Among them, the lead screw driving mechanism and the linear motor 10 are both fixed on the separator body. In this embodiment, connection blocks 11 are connected to the output shafts of the linear motors 10 of the second driving mechanism 6 and the third driving mechanism 7. The partition plate 3 and the auxiliary pressing plate 4 are respectively fixed to the two connection blocks 11. When the linear motor 10 operates, the driving force is transmitted to the partition plate 3 or the auxiliary pressing plate 4 through the output shaft and the connection block 11. The specific installation and connection methods are selected according to the actual design to ensure the function of driving the main pressing plate 1, the partition plate 3, and the auxiliary pressing plate 4 to move stably. The control module can adopt a programmable controller, which has the functions of receiving and processing signals and sending control instructions.

[0035] Referring to Figure 1-2 As shown in the figure, further, to realize the automatic control of the whole operation process, a sensor module connected to the control module is also included. The sensor module includes a first color sensor 12, a second color sensor 16, a first pressure sensor 13, a second pressure sensor, a first photoelectric switch 14, a second photoelectric switch 17, and a third photoelectric switch 19, which are respectively connected to the control module.

[0036] Referring to Figure 1-2 As shown in the figure, among them, the first color sensor 12 is used to detect the color of the part of the blood bag between the main pressing plate 1 and the support wall 2. During the process of the first driving mechanism 5 driving the main pressing plate 1 to move closer to the support wall 2, when the white film color of the part of the blood bag between the main pressing plate 1 and the support wall 2 disappears, the control module controls the first driving mechanism 5 to stop running according to the signal of the first color sensor 12, and controls the second driving mechanism 6 to run to drive the partition plate 3 to move closer to the main pressing plate 1.

[0037] Referring to Figure 1-2As shown, specifically, the first color sensor 12 is installed on the support wall 2 of the separator. By using the different colors of the white film and the remaining components, it is determined whether the white film is squeezed into the part of the blood bag between the secondary pressing plate 4 and the primary pressing plate 1 according to whether the color of the white film in the part of the blood bag between the primary pressing plate 1 and the support wall 2 disappears. During the process of the primary pressing plate 1 squeezing the blood bag, when the white film is completely squeezed into the part of the blood bag between the secondary pressing plate 4 and the primary pressing plate 1, the color of the white film in the part of the blood bag between the primary pressing plate 1 and the support wall 2 disappears. At this time, the drive system controls the first drive mechanism 5 to stop running according to the signal of the first color sensor 12, and controls the second drive mechanism 6 to run to drive the partition plate 3 to move closer to the primary pressing plate 1 until the partition plate 3 squeezes the blood bag against the primary pressing plate 1 to separate the white film component and the remaining component. By using the signal of the first color sensor 12 to determine the node at which the first drive mechanism 5 stops running and the second drive mechanism 6 starts running, it is ensured that the white film component and the remaining component are accurately separated, enabling the white film to be completely extruded and preventing the remaining component from being extruded, thus achieving the accurate separation of the white film.

[0038] Refer to Figure 1-2 As shown, the first pressure sensor 13 is connected to the partition plate 3 to detect the pressure between the partition plate 3 and the primary pressing plate 1. The first pressure sensor 13 is connected to the control module. When the second drive mechanism 6 drives the partition plate 3 to move closer to the primary pressing plate 1, the control module controls the second drive mechanism 6 to stop running according to the pressure signal of the first pressure sensor 13 when the pressure exceeds the set value, and controls the third drive mechanism 7 to run to drive the secondary pressing plate 4 to move closer to the primary pressing plate 1.

[0039] Refer to Figure 1-2 As shown, specifically, in this embodiment, the first pressure sensor 13 is installed between the output shaft of the linear motor 10 of the second drive mechanism 6 and the connecting block 11. When the linear motor 10 runs, the driving force is transmitted to the first pressure sensor 13 through the output shaft, and then transmitted to the connecting block 11 and the partition plate 3 through the first pressure sensor 13. When the partition plate 3 squeezes the blood bag against the primary pressing plate 1, the first pressure sensor 13 can indirectly detect the pressure between the partition plate 3 and the primary pressing plate 1. This setting is because for blood bags of different specifications or capacities, the distance between the primary pressing plate 1 and the support wall 2 is different each time the primary pressing plate 1 stops moving, and the distance that the partition plate 3 moves closer to the primary pressing plate 1 also needs to be adjusted accordingly to ensure that there is enough pressure to press the blood bag. Therefore, by detecting the pressure between the partition plate 3 and the primary pressing plate 1 through the first pressure sensor 13 to control the moving distance of the partition plate 3, it can be ensured that the partition plate 3 can generate enough pressure on blood bags of different specifications or capacities to ensure that the blood bag is separated into two non - communicating parts by the partition plate 3, that is, to separate the white film component and the remaining component.

[0040] When the third driving mechanism 7 drives the auxiliary pressing plate 4 to move closer to the main pressing plate 1, due to blood bags of different specifications or capacities, when the main pressing plate 1 stops, the distance between the main pressing plate 1 and the support wall 2 is different, and the moving distance of the auxiliary pressing plate 4 closer to the main pressing plate 1 also needs to be adjusted to ensure the extrusion effect on the blood bag.

[0041] As shown in Figure 1-2 In order to control the moving distance of the auxiliary pressing plate 4 closer to the main pressing plate 1, a first photoelectric switch 14 and a corresponding first trigger 15 are provided. The first photoelectric switch 14 is connected to the partition plate 3 and connected to the control module. The first trigger 15 is connected to the auxiliary pressing plate 4. When the partition plate 3 presses the blood bag against the main pressing plate 1, when the auxiliary pressing plate 4 moves closer to the main pressing plate 1, it can move to the position where the first trigger 15 triggers the first photoelectric switch 14. When the first photoelectric switch 14 is triggered, it sends a signal to the control module. When the control module receives the signal from the first photoelectric switch 14, it controls the third driving mechanism 7 to stop running.

[0042] As shown in Figure 1-2 Specifically, in this embodiment, the first photoelectric switch 14 is installed on the connecting block 11 connected to the partition plate 3, and the first trigger 15 is installed on the connecting block 11 connected to the auxiliary pressing plate 4. Since the moving distance of the partition plate 3 closer to the main pressing plate 1 is adjusted according to the pressure data of the first pressure sensor 13, for blood bags of different specifications or capacities, the partition plate 3 can maintain an appropriate moving distance. Therefore, taking the partition plate 3 as a reference to determine the moving distance of the auxiliary pressing plate 4 closer to the main pressing plate 1 can ensure that the auxiliary pressing plate 4 moves an appropriate distance to achieve a good extrusion effect on the blood bag.

[0043] As shown in Figure 1-2 Furthermore, the second color sensor 16 is used to detect the color of the part of the blood bag between the main pressing plate 1 and the auxiliary pressing plate 4. The second color sensor 16 is connected to the control module. According to the signal of the second color sensor 16, when the white film color of the part of the blood bag between the main pressing plate 1 and the auxiliary pressing plate 4 disappears, the control module controls the third driving mechanism 7 to drive the auxiliary pressing plate 4 to move away from the main pressing plate 1.

[0044] As shown in Figure 1-2As shown, specifically, the second color sensor 16 is installed on the side of the auxiliary pressing plate 4 close to the main pressing plate 1. According to whether the white film color of the part of the blood bag between the main pressing plate 1 and the auxiliary pressing plate 4 disappears, it is judged whether the white film is completely extruded from the blood bag. According to the signal of the second color sensor 16, when the auxiliary pressing plate 4 stops and the white film color does not disappear, the control module controls the third driving mechanism 7 to drive the auxiliary pressing plate 4 to move away from the main pressing plate 1 by a certain distance, and then drives the auxiliary pressing plate 4 to move close to the main pressing plate 1 again until it stops. Then, according to the signal of the second color sensor 16, it is judged whether the white film is completely extruded, and the auxiliary pressing plate 4 reciprocates multiple times to squeeze the blood bag multiple times until the white film color disappears, indicating that the white film is completely extruded. At this time, according to the signal of the second color sensor 16, the control module controls the third driving mechanism 7 to drive the auxiliary pressing plate 4 to move away from the main pressing plate 1 to the initial position and then stop.

[0045] After the auxiliary pressing plate 4 moves to the initial position, the control module controls the second driving mechanism 6 to operate, drives the partition plate 3 to move away from the main pressing plate 1 to the initial position and then stops. Then, the control module controls the first driving mechanism 5 to operate, drives the main pressing plate 1 to move away from the support wall 2 to the initial position and then stops.

[0046] Refer to Figure 1-2 As shown, specifically, the second photoelectric switch 17 and the corresponding second trigger 18, as well as the third photoelectric switch 19 and the corresponding third trigger 20 are set. The second photoelectric switch 17 is connected to the separator body, the second trigger 18 is connected to the partition plate 3, the second photoelectric switch 17 is connected to the control module. When the partition plate 3 moves away from the main pressing plate 1 from the state of squeezing the blood bag, the partition plate 3 can move to the second trigger 18 to trigger the second photoelectric switch 17. When the second photoelectric switch 17 is triggered, it sends a signal to the control module. When the control module receives the signal of the second photoelectric switch 17, it controls the second driving mechanism 6 to stop operating; the third photoelectric switch 19 is connected to the separator body, the third trigger 20 is connected to the auxiliary pressing plate 4, the third photoelectric switch 19 is connected to the control module. When the auxiliary pressing plate 4 moves away from the main pressing plate 1 from the state of squeezing the blood bag, the auxiliary pressing plate 4 can move to the third trigger 20 to trigger the third photoelectric switch 19. When the third photoelectric switch 19 is triggered, it sends a signal to the control module. When the control module receives the signal of the third photoelectric switch 19, it controls the third driving mechanism 7 to stop operating.

[0047] Refer to Figure 1-2As shown, in this embodiment, the second optoelectronic switch 17 is fixed on the linear motor 10 of the second driving mechanism 6, the second trigger 18 is installed on the connecting block 11 connected to the partition plate 3, the third optoelectronic switch 19 is installed on the linear motor 10 of the third driving mechanism 7, and the third trigger 20 is installed on the connecting block 11 connected to the auxiliary pressing plate 4. During design, when the partition plate 3 moves to the initial position, the second trigger 18 triggers the second optoelectronic switch 17, and when the auxiliary pressing plate 4 moves to the initial position, the third trigger 20 triggers the third optoelectronic switch 19, realizing the function of resetting the partition plate 3 and the auxiliary pressing plate 4 to the initial position. In this embodiment, the first trigger 15, the second trigger 18, and the third trigger 20 adopt trigger pieces, and appropriate shapes and installation methods are selected according to the actual design situation.

[0048] Further, in the initial stage when the main pressing plate 1 moves close to the support wall 2, the main pressing plate 1 is not in contact with the blood bag, that is, there is a blank stroke for the main pressing plate 1. When the main pressing plate 1 is not in contact with the blood bag, it can move quickly to fast forward the blank stroke, and after the main pressing plate 1 contacts the blood bag, it needs to slowly squeeze the blood bag. Therefore, a second pressure sensor (not shown in the figure) is provided, which is installed on the main pressing plate 1 to detect the pressure between the main pressing plate 1 and the blood bag. The second pressure sensor is connected to the control module. When the first driving mechanism 5 drives the main pressing plate 1 to move close to the support wall 2, the control module, according to the pressure signal of the second pressure sensor, when the pressure exceeds the set value, controls the first driving mechanism 5 to reduce the moving speed of the main pressing plate 1 moving close to the support wall 2.

[0049] Specifically, the second pressure sensor is installed on one side of the main pressing plate 1 close to the support wall 2. In the initial stage when the main pressing plate 1 moves close to the support wall 2 and the main pressing plate 1 has not yet contacted the blood bag, the second pressure sensor detects a low pressure value and feeds back a signal to the control module. The control module controls the first driving mechanism 5 to drive the main pressing plate 1 to move at a faster speed. The main pressing plate 1 quickly moves to contact the blood bag. At this time, the second pressure sensor detects an increase in the pressure value and feeds back a signal to the control module. The control module controls the first driving mechanism 5 to reduce the moving speed of the main pressing plate 1, and the main pressing plate 1 slowly moves to squeeze the blood bag; then the control system controls the first driving mechanism 5 to stop operating according to the signal of the first color sensor 12 so that the main pressing plate 1 stops operating.

[0050] Through the above settings, the full-automatic control of the entire white film separation process can be realized. Personnel only need to place and remove the blood bag, which improves efficiency, and the white film and the remaining components can be accurately separated, so that the white film can be completely extruded and the extrusion of the remaining components can be avoided, realizing the precise separation of the white film components.

[0051] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A three-plate extrusion control system for a blood separator, characterized in that: include: A first driving mechanism (5), which is connected to the main pressing plate (1) and is used to drive the main pressing plate (1) to move; A second driving mechanism (6), which is connected to the partition plate (3) and is used to drive the partition plate (3) to move; a third driving mechanism (7), which is connected to the auxiliary pressing plate (4) and is used to drive the auxiliary pressing plate (4) to move; A control module, used for controlling the operation of the first driving mechanism (5), the second driving mechanism (6) and the third driving mechanism (7); A first color sensor (12) is used to detect the color of the portion of the blood bag located between the main pressure plate (1) and the support wall (2). The first color sensor (12) is connected to the control module and is suitable for controlling the first drive mechanism (5) to stop running and controlling the second drive mechanism (6) to drive the partition plate (3) to move closer to the main pressure plate (1) when the white film color of the portion of the blood bag located between the main pressure plate (1) and the support wall (2) disappears during the process of the first drive mechanism (5) driving the main pressure plate (1) to move closer to the support wall (2).

2. The three-plate extrusion control system of the blood separator according to claim 1, characterized in that; It also includes a first pressure sensor (13), which is connected to the partition plate (3) and is used to detect the pressure between the partition plate (3) and the main pressure plate (1). The first pressure sensor (13) is connected to the control module. When the second drive mechanism (6) drives the partition plate (3) to move closer to the main pressure plate (1), the control module controls the second drive mechanism (6) to stop running when the pressure exceeds a set value based on the pressure signal of the first pressure sensor (13), and controls the third drive mechanism (7) to run and drive the auxiliary pressure plate (4) to move closer to the main pressure plate (1).

3. The three-plate extrusion control system of the blood separator according to claim 1 is characterized in that: It also includes a first photoelectric switch (14) and a first triggering member (15), wherein the first photoelectric switch (14) is connected to the partition plate (3) and to the control module, and the first triggering member (15) is connected to the auxiliary pressure plate (4). When the partition plate (3) presses the blood bag onto the main pressure plate (1), the auxiliary pressure plate (4) moves close to the main pressure plate (1) and can move to the first triggering member (15) to trigger the first photoelectric switch (14). When the first photoelectric switch (14) is triggered, it sends a signal to the control module. When the control module receives the signal from the first photoelectric switch (14), it controls the third drive mechanism (7) to stop running.

4. The three-plate extrusion control system of the blood separator according to claim 1 is characterized in that: It also includes a second color sensor (16) for detecting the color of the portion of the blood bag located between the main pressure plate (1) and the auxiliary pressure plate (4). The second color sensor (16) is connected to the control module. The control module controls the third drive mechanism (7) to drive the auxiliary pressure plate (4) to move away from the main pressure plate (1) when the white film color of the portion of the blood bag located between the main pressure plate (1) and the auxiliary pressure plate (4) disappears based on the signal of the second color sensor (16).

5. The three-plate extrusion control system of the blood separator according to claim 1, characterized in that; The invention also comprises a second photoelectric switch (17) and a second triggering member (18), wherein the second photoelectric switch (17) is connected to the separator body, the second triggering member (18) is connected to the partition plate (3), the second photoelectric switch (17) is connected to the control module, when the partition plate (3) moves away from the main pressure plate (1) from the state of squeezing the blood bag, the partition plate (3) can move to the second triggering member (18) to trigger the second photoelectric switch (17), when the second photoelectric switch (17) is triggered, it sends a signal to the control module, and when the control module receives the signal from the second photoelectric switch (17), it controls the second driving mechanism (6) to stop running.

6. The three-plate extrusion control system of the blood separator according to claim 1, characterized in that: The invention also comprises a third photoelectric switch (19) and a third triggering member (20), wherein the third photoelectric switch (19) is connected to the separator body, and the third triggering member (20) is connected to the auxiliary pressure plate (4). The third photoelectric switch (19) is connected to the control module. When the auxiliary pressure plate (4) moves away from the main pressure plate (1) from the state of squeezing the blood bag, the auxiliary pressure plate (4) can move to the third triggering member (20) to trigger the third photoelectric switch (19). When the third photoelectric switch (19) is triggered, it sends a signal to the control module. When the control module receives the signal from the third photoelectric switch (19), it controls the third driving mechanism (7) to stop running.

7. The three-plate extrusion control system of the blood separator according to claim 1 is characterized in that: It also includes a second pressure sensor, which is connected to the main pressure plate (1) and is used to detect the pressure between the main pressure plate (1) and the blood bag. The second pressure sensor is connected to the control module. When the first drive mechanism (5) drives the main pressure plate (1) to move closer to the support wall (2), the control module controls the first drive mechanism (5) to drive the main pressure plate (1) to move closer to the support wall (2) to reduce the speed when the pressure exceeds a set value based on the pressure signal of the second pressure sensor.

Images