Automatic plasma separation cup detection device and method

Abstract

The invention discloses a plasma separation cup automatic detection device and method, and belongs to the technical field of medical instruments.The plasma separation cup automatic detection device comprises a mounting base, the mounting base is used for fixing a plasma separation cup and driving a cup body of the plasma separation cup to rotate, and the mounting base is further provided with a detection jig; the detection jig is used for detecting the sealing performance of the plasma separation cup, the detection jig comprises a ventilation jig and a wire welding jig, the ventilation jig is used for sealing a blood inlet and a plasma outlet of the plasma separation cup, the ventilation jig is communicated with a pump assembly and an air pressure detector, the wire welding jig comprises a shell, and the shell is provided with an air inlet and an air outlet. The shell is used for forming a cavity with the outer side wall of a cup cover and the outer side wall of a cup body of the plasma separation cup, and the pump assembly and the air pressure detector are both communicated with the cavity, so that the problem of leakage caused by insufficient running-in of a sealing gasket and a sealing ring of the plasma separation cup in the subsequent use process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an automatic detection device and method for a plasma separation cup. Background Art

[0002] The Plasma Separation Cup (PSC) is a core, disposable component in blood component apheresis systems (e.g., for collecting plasma, platelets, and red blood cells). Its primary function is to safely and effectively separate whole blood into its various component layers (primarily plasma, platelets, white blood cells, and red blood cells) in a closed, sterile environment, utilizing centrifugal force. This allows the target component (usually plasma or platelets) to be collected into a specific bag while the other components are returned to the donor or patient.

[0003] Among them, when the plasma separation cup is in working state, part of it is fixed by the plasma collection equipment, called the "stationary head assembly", including the stationary head, upper cover, lower cover, central tube, sealing bowl, and sealing gasket; and part of it is dragged by the equipment to rotate at high speed, called the "cup body assembly", including the cup body, cup core, cup cover, and sealing ring.

[0004] During the use of the plasma separation cup, the failure of its seal will bring great risks to patients and medical staff. Therefore, in the preparation process of the plasma separation cup, the sealing performance testing technology is a relatively core link.

[0005] The goal of leak testing is to reliably and efficiently identify any defects in the separation cup and its connecting piping that could compromise sterility or lead to blood or air leakage. The pressure decay method is a common technique in existing technologies. Leaks are detected by filling the cup with a constant pressure of gas and monitoring the pressure drop after stabilization. While the equipment is relatively simple, it is significantly affected by temperature, has a slow response for large components, and has limited sensitivity for very small leaks. The vacuum decay method places the cup in a vacuum chamber, evacuates it, and monitors the pressure rise (caused by internal gas entering the chamber through a leak). It works well for rigid components and is generally more sensitive than the pressure decay method, but requires a vacuum chamber. The tracer gas method represents the pinnacle of sensitivity. Helium mass spectrometry leak detection (in vacuum mode or external sniffing mode) uses helium as a tracer. A highly sensitive mass spectrometer can detect leaks with an accuracy of up to 10^{-12} mbar·L / s. While it is a benchmark method, it is expensive, complex, time-consuming, and requires helium. It is primarily used for critical verification or troubleshooting. Hydrogen mixture detection (such as 5% H2in N2) combined with a hydrogen sensor (thermal conductivity or hydrogen-sensitive sensor) is a more cost-effective alternative. Although its sensitivity is slightly lower than helium detection, it is higher than the pressure / vacuum decay method and is increasingly used.

[0006] During traditional sealing performance testing, the plasma separation cup is kept stationary. However, during operation, the cup body rotates at high speed relative to the stationary head. Data obtained from traditional testing makes it difficult to assess the sealing performance of the plasma separation cup's gasket during this process. This can lead to insufficient wear-in between the plasma separation cup's gasket and sealing ring, resulting in leakage during rotation and potentially causing blood leakage. Summary of the Invention

[0007] The object of the present invention is to provide a plasma separation cup automatic detection device and method to solve the above problems.

[0008] The present invention is achieved through the following technical solutions: A plasma separation cup automatic detection device includes a mounting base, which is used to fix the plasma separation cup and drive the cup body of the plasma separation cup to rotate. The mounting base is also provided with a detection jig, which is used to detect the sealing performance of the plasma separation cup. The detection jig includes a ventilation jig and a welding wire jig. The ventilation jig is used to seal the blood inlet and plasma outlet of the plasma separation cup. The ventilation jig is connected to a pump assembly and an air pressure detector. The welding wire jig includes an outer shell, which is used to form a cavity with the outer wall of the cup cover and the outer wall of the cup body of the plasma separation cup, and the pump assembly and the air pressure detector are both connected to the cavity. The pump assembly is used to inject pressurized gas into the plasma separation cup. The pump assembly is also used to generate negative pressure in the cavity. The air pressure detector is used to collect the air pressure in the plasma separation cup and the cavity.

[0009] Compared with the prior art, the present invention has the following advantages and beneficial effects: In the present invention, the working scene of the plasma separation cup is simulated through the design of the ventilation fixture, and the dynamic sealing performance test of the sealing ring, sealing gasket and other parts of the plasma separation cup has been realized. Compared with the static sealing performance test scheme, this scheme can detect the running-in status of the sealing ring and the sealing gasket during the high-speed rotation of the sealing ring, so as to ensure that all positions of the sealing ring and the sealing gasket can meet the sealing requirements, thereby improving the safety of subsequent use of the plasma separation cup.

[0010] At the same time, the present invention also uses the design of a welding fixture to construct a cavity using the outer wall of the shell and the plasma separation cup. By constructing a negative pressure in the cavity and monitoring the changes in the air pressure in the cavity, the sealing performance of the welding position can be tested. Compared with the existing technology, this solution can perform different sealing performance tests for each position according to the working status of each position during the operation of the plasma separation cup, thereby reducing possible leakage during the subsequent use of the plasma separation cup and improving the safety of the finished plasma separation cup.

[0011] Furthermore, the mounting base includes a cup holder, a motor is provided below the cup holder, and an output shaft of the motor is coaxially and fixedly connected to the cup holder.

[0012] Beneficial effects: This solution uses the design of a motor to drive the plasma separation cup to rotate through the cup holder, thereby simulating the motion state of the plasma separation cup. At the same time, when this solution is applied to the assembly line processing of the plasma separation cup, the motor can also be used to adjust the angle of the plasma separation cup to achieve standardized and consistent operation of the separation cup in the later stage.

[0013] Furthermore, rubber rings are provided between the cup body and the cup cover and the outer shell, and the rubber rings are fixedly connected to the outer shell.

[0014] Beneficial effect: In this solution, the rubber ring is designed to fill the gap between the cup body, the cup cover and the shell through deformation, thereby improving the airtightness of the cavity and thus improving the accuracy of the welding line sealing performance test. At the same time, the design of the rubber ring can also compress the shell when the operator uses the pump assembly to pump negative pressure into the cavity. The shell compresses the rubber ring, causing the rubber ring to elastically deform and absorb the kinetic energy transmitted to the shell, thereby reducing the probability of the shell damaging the plasma separation cup. Furthermore, an exhaust hole is provided on the inner bottom wall of the cup base, and the exhaust hole is used to discharge the air between the plasma separation cup and the inner wall of the cup base and to limit the displacement of the plasma separation cup.

[0015] Beneficial effect: The design of the vent hole in this solution can help discharge the air between the plasma separation cup and the cup base when the plasma separation cup enters the cup base, so that the two can fit more closely. At the same time, the vent hole can also limit the movement of the plasma separation cup through the boss at the bottom of the plasma separation cup, thereby guiding the plasma separation cup to the appropriate position in the cup base. Compared with the existing technology, this solution can realize the automatic installation of the plasma separation cup.

[0016] Furthermore, the ventilation fixture includes a plurality of covers, and the covers are symmetrically arranged, any one of the covers is connected to the pump assembly, and another one of the covers is connected to the air pressure detector.

[0017] Beneficial effect: Compared with the solution using a complete annular ventilation fixture, the design of the cover in this solution can adapt to the more complex structural shape near the stationary head and simplify the installation process of the ventilation fixture.

[0018] Furthermore, the vent hole is coaxially arranged with the cup base, and the vent hole can be slidably matched with the outer side wall of the plasma separation cup.

[0019] Beneficial effect: This solution designs the position of the exhaust hole so that the cup holder can fit more closely with the plasma separation cup, thereby increasing the contact surface between the two and thereby increasing the friction between the two, thereby reducing the risk of the plasma separation cup slipping or detaching from the cup holder due to centrifugal force during the subsequent rotation of the plasma separation cup by the motor through the cup holder.

[0020] Furthermore, a plasma separation cup automatic detection method implemented based on the above-mentioned plasma separation cup automatic detection device includes: S1: Select a conveyor belt, fix the cup holder to the conveyor belt, and then place the plasma separation cup to be tested on the cup holder; S2: Using a motor to align the blood inlets of the plasma separation cups on the conveyor belt; S3: Installing the detection fixture on the plasma separation cup and simultaneously observing the displacement of the stationary head; when the displacement of the stationary head reaches a set value, starting the motor, and starting the pump assembly and the air pressure detector; injecting pressurized gas into the plasma separation cup through the pump assembly until the plasma separation cup reaches a set positive pressure; after the positive pressure is maintained for a set time, checking the sealing performance of the plasma separation cup, and rejecting the plasma separation cup with unqualified sealing performance; S4: Installing the housing onto the qualified plasma separation cup, and extracting the gas inside the housing through the pump assembly until the interior of the housing reaches a set negative pressure. After the negative pressure persists for a set period of time, testing the sealing performance of the weld between the lid and the body of the plasma separation cup based on the pressure change, and rejecting the plasma separation cup with unqualified sealing performance; S5: The plasma separation cup having qualified sealing performance twice is moved to a qualified product storage box to complete the inspection of the plasma separation cup.

[0021] Beneficial effects: The motor design in this solution drives the adjustment of the direction of the plasma separation cup through the motor, so as to facilitate standardized operation during the subsequent sealing performance test. During the subsequent testing of the plasma separation cup, the motor can also rotate the cup body to simulate the working state of the plasma separation cup, thereby testing the sealing performance of the gasket and the sealing ring in the plasma separation cup. At the same time, this solution conducts specific sealing performance tests based on the different working states of different positions in the working process of the plasma separation cup. Compared with static sealing performance tests, this solution can reduce the number of qualified products tested. During subsequent use, due to insufficient running-in of the sealing ring and the sealing ring, the sealing ring and the sealing ring may leak, thereby causing biological contamination.

[0022] Furthermore, in S2, before adjusting the direction of the blood inlet of the plasma separation cup, images of all the plasma separation cups on the conveyor belt are collected, and the position of the blood inlet of the stationary head of the plasma separation cup is identified. The motor is controlled to operate according to the identification result, and the motor drives the plasma separation cup to rotate through the cup seat until the blood inlet directions of the plasma separation cups are consistent.

[0023] Beneficial effects: This solution combines machine vision technology to achieve automatic adjustment of the direction of the plasma separation cup. Compared with the existing technology, this solution effectively reduces the installation steps for operators and reduces the degree of manual participation in the plasma separation cup detection process.

[0024] Furthermore, in S3 and S4, the step of removing the plasma separation cup with unqualified sealing performance is: selecting a manipulator and installing the manipulator on the transmission belt, then obtaining the position of the unqualified plasma separation cup according to the sealing performance test result of the plasma separation cup, and combining with the image of the plasma separation cup above the transmission belt, controlling the manipulator to grab the unqualified plasma separation cup, and moving the unqualified plasma separation cup to the unqualified product unloading area.

[0025] Beneficial effects: In this solution, a robotic arm is used to implement the step of rejecting unqualified products, further reducing the manual participation in the plasma separation cup testing process, improving the standardization and normalization of the testing process, and at the same time helping to improve the detection efficiency of the plasma separation cup.

[0026] Furthermore, in S3 , the displacement of the stationary head is set to a value of 2 mm to 3 mm.

[0027] Beneficial Effects: Due to the structural design of the plasma separation cup, a sealing ring and gasket are placed between the stationary head and the cup body to achieve a dynamic seal between the two. When the stationary head of a qualified plasma separation cup is subjected to force, it squeezes the sealing ring and gasket, causing them to elastically deform. If the stationary head does not sink after being pressed down, there may be structural defects around the sealing ring, such as hardening of the sealing ring or seizure of the surrounding structure. Therefore, during the inspection of the plasma separation cup, this device can use the deadweight of the ventilation fixture to inspect the sealing ring and its surrounding structure, expanding the scope of application of this solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings: Figure 1 It is a partial schematic diagram of the ventilation fixture of the present invention; Figure 2 It is a partial schematic diagram of the wire bonding jig of the present invention; Figure 3 is a flow chart of the present invention; Figure 4 Schematic diagram of the plasma separation cup detection line in the present invention.

[0029] The reference numerals represent: 1. plasma separation cup; 11. blood inlet; 12. plasma outlet; 13. stationary head; 14. cup body; 141. boss; 2. pump assembly; 3. cover body; 4. mounting seat; 41. cup seat; 411. exhaust hole; 42. motor; 5. air pressure detector; 6. welding wire fixture; 61. outer shell; 62. vent; 63. rubber ring. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the examples and accompanying drawings. The exemplary embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention. It should be noted that the present invention is already in the actual development and use stage.

[0031] Example 1 like Figures 1 to 2 As shown, this embodiment includes: a mounting base 4, the mounting base 4 is used to fix the plasma separation cup 1 and the cup body 14 of the plasma separation cup 1 to rotate, the mounting base 4 includes a cup seat 41, a motor 42 is provided below the cup seat 41, the output shaft of the motor 42 is coaxially fixedly connected to the cup seat 41, and a detection fixture is further provided on the cup seat 41, the detection fixture is used to detect the sealing performance of the plasma separation cup 1, the detection fixture includes a ventilation fixture and a welding wire fixture 6, the ventilation fixture is used to seal the blood inlet 11 and the slurry outlet 12 of the plasma separation cup 1, the ventilation fixture includes two symmetrically arranged covers 3, and the covers 3 are used to seal the blood inlet 11 and the slurry outlet 12 respectively. The ventilation fixture is connected to a pump assembly 2 and an air pressure detector 5. In this embodiment, the pump assembly 2 is an air pump. The pump assembly 2 is connected to a cover body 3 that seals the blood inlet 11. The air pressure detector 5 is connected to another cover body 3. The pump assembly 2 is used to inject pressurized gas into the plasma separation cup 1. The air pressure detector 5 is used to collect the air pressure in the plasma separation cup 1. The welding wire fixture 6 includes a shell 61, which is used to form a cavity with the outer wall of the cup cover of the plasma separation cup 1 and the outer wall of the cup body 14. A vent 62 is opened on the side wall of the shell 61, and the pump assembly 2 and the air pressure detector 5 are both connected to the cavity through the vent 62. The pump assembly 2 is also used to generate negative pressure in the cavity.

[0032] The specific implementation is as follows: When using the present device to test the sealing performance of the plasma separation cup 1, the plasma separation cup 1 is placed on the cup seat 41 with the static head 13 facing upward, and then the two covers 3 of the ventilation fixture are respectively installed on the blood inlet 11 and the plasma outlet 12 of the plasma separation cup 1, so that the interior of the plasma separation cup 1 is sealed, and then the motor 42 is started. The motor 42 drives the plasma separation cup 1 to rotate through the cup seat 41, thereby simulating the working state of the plasma separation cup 1, and then the pump assembly 2 is started to pump pressurized gas into the plasma separation cup 1 through the cover 3 at the corresponding position. At the same time, the air pressure change in the plasma separation cup 1 is monitored by the air pressure detector 5. When the air pressure inside the plasma separation cup 1 reaches the set positive pressure, ventilation can be stopped. If there is no pressure leakage inside the plasma separation cup 1 within the set time, it can be determined that the sealing performance of the sealing gasket and the sealing ring of the plasma separation cup 1 is qualified, and the next test step can be entered. If there is pressure leakage inside the plasma separation cup 1 within the set time, the plasma separation cup 1 is unqualified and is discarded.

[0033] After removing the ventilation fixture, install the shell 61 on the qualified plasma separation cup 1. During installation, make the top of the shell 61 fit with the outer wall of the cup cover, and the bottom of the shell 61 fit with the outer wall of the cup body 14, so that the shell 61 completely wraps the weld line between the cup body 14 and the cup cover. The inner wall of the shell 61 and the outer wall of the cup body 14 and the outer wall of the cup cover form a cavity. Then, the gas in the cavity is extracted by the pump assembly 2, and the air pressure in the cavity is monitored in real time by the air pressure monitor. When the cavity reaches the set negative pressure, turn off the pump assembly 2. If there is no pressure leakage in the cavity within the set time, it can be judged that the welding between the cup body 14 and the cup cover in the plasma separation cup 1 is qualified. If pressure leakage occurs, the plasma separation cup 1 is unqualified and it is discarded to complete the inspection of the plasma separation cup 1.

[0034] Example 2 The difference from the above embodiment is that a rubber ring 63 is provided between the cup body 14 and the cup lid and the outer shell 61, and the rubber ring 63 is bonded and fixed to the outer shell 61. The inner bottom wall of the cup base 41 is provided with a vent hole 411, which is used to exhaust air between the plasma separation cup 1 and the inner wall of the cup base 41 and to limit the displacement of the plasma separation cup 1. The vent hole 411 is coaxial with the cup base 41 and can slide with the outer wall of the plasma separation cup 1.

[0035] The specific implementation is as follows: During use of this solution, the design of the rubber ring 63 allows it to deform, filling the tiny gap between the outer shell 61 and the cup body 14, or between the outer shell 61 and the cup lid, thereby sealing the cavity and reducing the probability of gas entering the cavity from between the outer shell 61 and the plasma separation cup 1. Furthermore, the design of the rubber ring 63 allows the outer shell 61 and the plasma separation cup 1 to compress the rubber ring 63 under the action of air pressure while the pump assembly 2 is applying negative pressure to the cavity, thereby achieving a closer fit between the outer shell 61 and the plasma separation cup 1, thereby improving the sealing effect of the outer shell 61 and thereby enhancing the accuracy of subsequent sealing performance assessments.

[0036] Due to the design of the exhaust hole 411 in this solution, when the operator places the plasma separation cup 1 into the cup holder 41, part of the air between the plasma separation cup 1 and the cup holder 41 is discharged from the exhaust hole 411. At the same time, due to the design of the exhaust hole 411, it can fit in the position of the bottom boss 141 of the cup body 14 of the plasma separation cup 1. When the operator places the plasma separation cup 1 into the cup holder 41, under the action of gravity, the plasma separation cup 1 moves downward along the inner wall of the cup holder 41 until the bottom boss 141 of the plasma separation cup 1 enters the exhaust hole 411. Compared with the existing technology, this solution limits the movement trajectory of the plasma separation cup 1 entering the cup holder 41 through the design of the exhaust hole 411, thereby realizing automatic adjustment of the position of the plasma separation cup 1.

[0037] Example 3 like Figure 3 -Attached Figure 4 As shown, the difference from the above embodiment is that: a method for automatically detecting a plasma separation cup 1 is performed based on the above automatic detection device for a plasma separation cup 1, comprising: S1: Select a conveyor belt and fix the mounting base 4 to the conveyor belt, then place the plasma separation cup 1 to be tested on the cup base 41. Due to the function of the exhaust hole 411, the plasma separation cup 1 automatically reaches the appropriate position of the cup base 41.

[0038] S2: Collect images of all the plasma separation cups 1 on the conveyor belt, and perform feature recognition on the positions of the blood inlets 11 of the stationary heads 13 of the plasma separation cups 1. Based on the recognition results, control the operation of the motor 42, which drives the plasma separation cups 1 to rotate through the cup holders 41 until the blood inlets 11 of the plasma separation cups 1 on the conveyor belt face left and the plasma outlets 12 face right, thereby facilitating the subsequent installation and removal of the pump assembly 2 and the air pressure detector 5. S3: Install the detection fixture on the plasma separation cup 1 and simultaneously observe the displacement of the stationary head 13. When the displacement of the stationary head 13 reaches a set value of 2 mm to 3 mm, start the motor 42, and the speed of the motor 42 is not less than 3000 rpm. Then start the pump assembly 2 and the air pressure detector 5 to inject pressurized gas into the plasma separation cup 1 through the pump assembly 2 until the plasma separation cup 1 reaches a set positive pressure of 20 kPa ± 2. After the positive pressure is maintained for a set time of 5 seconds, check the sealing performance of the plasma separation cup 1, and discard the plasma separation cup 1 with unqualified sealing performance; S4: Install the housing 61 onto a qualified plasma separation cup 1, and extract the gas inside the housing 61 through the pump assembly 2 until the interior of the housing 61 reaches a set negative pressure of -50 kPa. After the negative pressure lasts for a set time of 5 seconds, test the sealing performance of the weld between the lid and the body of the plasma separation cup 1 based on the pressure change, and discard the plasma separation cup 1 with unqualified sealing performance; S5: The plasma separation cup 1 with qualified sealing performance twice is moved to a qualified product storage box to complete the inspection of the plasma separation cup 1.

[0039] In S3 and S4, the steps of removing the plasma separation cup 1 with unqualified sealing performance are: selecting a manipulator and installing the manipulator on the transmission belt, then obtaining the position of the unqualified plasma separation cup 1 according to the sealing performance test result of the plasma separation cup 1, and combining with the image of the plasma separation cup 1 above the transmission belt, controlling the manipulator to grab the unqualified plasma separation cup 1, and moving the unqualified plasma separation cup 1 to the unqualified product unloading area.

[0040] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A plasma separation cup automatic detection device, comprising a mounting seat (4), the mounting seat (4) being used to fix the plasma separation cup (1) and drive the cup body (14) of the plasma separation cup (1) to rotate, the mounting seat (4) being further provided with a detection jig, the detection jig being used to detect the sealing performance of the plasma separation cup (1), and characterized in that: The detection fixture includes a ventilation fixture and a welding wire fixture (6), the ventilation fixture is used to seal the blood inlet (11) and the plasma outlet (12) of the plasma separation cup (1), the ventilation fixture is connected to a pump component (2) and an air pressure detector (5), the welding wire fixture (6) includes a shell (61), the shell (61) is used to form a cavity with the outer wall of the cup cover of the plasma separation cup (1) and the outer wall of the cup body (14), and the pump component (2) and the air pressure detector (5) are both connected to the cavity, the pump component (2) is used to inject pressurized gas into the plasma separation cup (1), the pump component (2) is also used to generate negative pressure in the cavity, and the air pressure detector (5) is used to collect the air pressure in the plasma separation cup (1) and in the cavity.

2. The plasma separation cup automatic detection device according to claim 1, characterized in that: The mounting seat (4) comprises a cup seat (41), a motor (42) is provided below the cup seat (41), and an output shaft of the motor (42) is coaxially fixedly connected to the cup seat (41).

3. The plasma separation cup automatic detection device according to claim 1, characterized in that: A rubber ring (63) is provided between the cup body (14) and the cup cover and the outer shell (61), and the rubber ring (63) is fixedly connected to the outer shell (61).

4. The plasma separation cup automatic detection device according to claim 2, characterized in that: The inner bottom wall of the cup base (41) is provided with an exhaust hole (411), and the exhaust hole (411) is used to discharge air between the plasma separation cup (1) and the inner wall of the cup base (41) and to limit the displacement of the plasma separation cup (1).

5. The plasma separation cup automatic detection device according to claim 1, characterized in that: The ventilation fixture comprises a plurality of covers (3), and the covers (3) are symmetrically arranged, any one of the covers (3) is connected to the pump assembly (2), and another one of the covers (3) is connected to the air pressure detector (5).

6. The plasma separation cup automatic detection device according to claim 4, characterized in that: The exhaust hole (411) is coaxially arranged with the cup seat (41), and the exhaust hole (411) can be slidably matched with the outer wall of the plasma separation cup (1).

7. A method for automatically detecting a plasma separation cup implemented by the plasma separation cup automatic detection device according to any one of claims 1 to 6, characterized in that: include: S1: Select a conveyor belt, and fix the cup holder (41) to the conveyor belt, and then place the plasma separation cup (1) to be tested on the cup holder (41); S2: using a motor (42) to align the blood inlets (11) of the plasma separation cups (1) on the conveyor belt; S3: Install the detection fixture on the plasma separation cup (1), and simultaneously observe the displacement of the stationary head (13). When the displacement of the stationary head (13) reaches a set value, start the motor (42), and start the pump assembly (2) and the air pressure detector (5). Inject pressurized gas into the plasma separation cup (1) through the pump assembly (2) until the plasma separation cup (1) reaches a set positive pressure. After the positive pressure is maintained for a set period of time, check the sealing performance of the plasma separation cup (1), and remove the plasma separation cup (1) with unqualified sealing performance. S4: Install the housing (61) onto the qualified plasma separation cup (1), and extract the gas inside the housing (61) through the pump assembly (2) until the interior of the housing (61) reaches a set negative pressure. After the negative pressure lasts for a set period of time, test the sealing performance of the weld line between the cup cover and the cup body of the plasma separation cup (1) based on the pressure change, and remove the plasma separation cup (1) with unqualified sealing performance; S5: The plasma separation cup (1) having twice qualified sealing performance is moved to a qualified product storage box to complete the inspection of the plasma separation cup (1).

8. The method for automatic detection of a plasma separation cup according to claim 7, characterized in that: In S2, before adjusting the direction of the blood inlet (11) of the plasma separation cup (1), images of all the plasma separation cups (1) on the conveyor belt are collected, and the position of the blood inlet (11) of the stationary head (13) of the plasma separation cup (1) is identified. The motor (42) is controlled to work according to the identification result, and the motor (42) drives the plasma separation cup (1) to rotate through the cup seat (41) until the directions of the blood inlet (11) of the plasma separation cup (1) are consistent.

9. The method for automatic detection of a plasma separation cup according to claim 7, characterized in that: In S3 and S4, the steps of removing the plasma separation cup (1) with unqualified sealing performance are: selecting a manipulator and installing the manipulator on the transmission belt, then obtaining the position of the unqualified plasma separation cup (1) based on the sealing performance test result of the plasma separation cup (1), and controlling the manipulator to grab the unqualified plasma separation cup (1) in combination with the image of the plasma separation cup (1) above the transmission belt, and moving the unqualified plasma separation cup (1) to the unqualified product unloading area.

10. The method for automatic detection of a plasma separation cup according to claim 7, characterized in that: In S3, the displacement of the stationary head (13) is set to a value of 2 mm to 3 mm.

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