Isolation chamber device for a blood cell analyzer

Abstract

This utility model belongs to the technical field of blood cell analyzers, specifically relating to an isolation chamber device for a blood cell analyzer. It includes an isolation chamber body, a waste liquid outlet fixedly connected to the lower outer side of the isolation chamber body, a mixing gas inlet fixedly connected to the upper outer side of the isolation chamber body, a top cover fixedly connected to the upper side of the isolation chamber body, a reaction tank connection port fixedly connected to the upper side of the top cover, a filter body fixedly connected inside the isolation chamber body, a fixed blocking part fixedly connected inside the isolation chamber body opposite to the mixing gas inlet, a buoyancy component and a movable blocking part connected to the buoyancy component, which, when the buoyancy component rises, moves an airbag to the mixing gas inlet to seal it. This utility model can reduce the phenomenon of liquid from inside the isolation chamber body entering the mixing gas inlet.

Description

Technical Field

[0001] This utility model belongs to the technical field of blood cell analyzers, specifically relating to an isolation chamber device for a blood cell analyzer. Background Technology

[0002] In the field of medical devices, blood cell analyzers are one of the core devices for in vitro diagnostics and are widely used in medical institutions at all levels. The stability and reliability of their liquid circuit system directly affect the accuracy of the test results, and the isolation chamber device, as a key component of the liquid circuit system, undertakes the important functions of filtering waste liquid and isolating gaseous and liquid media.

[0003] In existing technologies, isolation chambers typically use filters to remove impurities (such as fragments of blood collection tube rubber) from waste liquids to protect precision pump and valve components in the liquid circuit. However, traditional designs have significant drawbacks: the small pore structure of the filter screen is prone to forming a "liquid membrane" due to liquid surface tension, which can easily draw liquid into the gas pipeline when backflow occurs at the mixing gas inlet.

[0004] For example, Chinese patent CN210294263U discloses a blood cell analyzer and its isolation chamber device. When backflow occurs at the mixing gas inlet, the blocking part can prevent liquid in the isolation chamber from passing through and prevent liquid from being sucked into the gas pipeline through the mixing gas inlet. This can effectively isolate the gas and liquid in the blood cell analysis fluid system, ensuring the gas-liquid isolation effect of the isolation chamber, preventing liquid medium from being sucked back into the gas path system, ensuring the stability of the mixing gas pressure, and effectively isolating external interference electrical signals, thereby improving the accuracy of blood cell analysis.

[0005] However, when the waste liquid outlet or waste liquid discharge pipeline malfunctions (such as blockage or valve failure), the liquid in the isolation chamber cannot be discharged normally, and the liquid level continues to rise. Traditional isolation chambers rely solely on fixed structures (such as filter supports and baffles) for passive protection, lacking a dynamic response mechanism to abnormal liquid level rises. They cannot effectively prevent large amounts of liquid from rushing into the gas path under negative pressure backflow, which may cause the gas path system to malfunction or the detection results to become invalid. Utility Model Content

[0006] The purpose of this invention is to provide an isolation chamber device for a blood cell analyzer that can reduce the phenomenon of liquid inside the isolation chamber entering the mixing gas inlet.

[0007] The specific technical solution adopted by this utility model is as follows:

[0008] An isolation chamber device for a blood cell analyzer includes an isolation chamber body, a waste liquid outlet fixedly connected to the lower side of the outer side of the isolation chamber body, a mixing gas inlet fixedly connected to the upper side of the outer side of the isolation chamber body, a top cover fixedly connected to the upper side of the isolation chamber body, a reaction tank connection port fixedly connected to the upper side of the top cover, a filter body fixedly connected inside the isolation chamber body, and a fixed blocking part opposite to the mixing gas inlet also fixedly connected inside the isolation chamber body.

[0009] The main body of the isolation chamber is also equipped with a buoyancy component and a movable blocking part that is connected to the buoyancy component. When the buoyancy component rises, it drives the airbag to move to the inlet of the mixed gas to block the inlet of the mixed gas.

[0010] Furthermore, the fixed blocking part includes an annular upper baffle fixedly connected to the inner wall of the isolation chamber body and located above the mixing gas inlet. An annular side baffle is fixedly connected to the inner circular surface of the annular upper baffle, and the annular side baffle is opposite to the mixing gas inlet.

[0011] Furthermore, the movable blocking part is installed on the annular side baffle, and a kinetic energy conversion component is installed inside the main body of the isolation chamber. The movable blocking part is connected to the kinetic energy conversion component through a transmission connection. When the buoyancy component rises, the kinetic energy conversion component drives the airbag to move horizontally toward the direction close to the mixing gas inlet.

[0012] Furthermore, the movable blocking part is a pneumatic extension sealing mechanism, which extends towards the mixing gas inlet when gas is input;

[0013] The kinetic energy conversion component includes an annular hollow shell fixedly connected to the inner wall of the isolation chamber. An annular plate is vertically slidably connected inside the annular hollow shell. A support rod is fixedly connected to the lower end of the annular hollow shell. A sliding hole is opened on the lower side of the annular hollow shell. The support rod is slidably connected inside the sliding hole. The lower end of the support rod is fixedly connected to a buoyancy component. A connecting pipe is fixedly connected to the upper end of the annular hollow shell. The connecting pipe is connected to a pneumatic extension sealing mechanism.

[0014] Furthermore, the pneumatic extension sealing mechanism includes an airbag fixedly connected to the side of the annular side baffle, and the connecting pipe is connected to the airbag.

[0015] Furthermore, the pneumatic extension sealing mechanism includes a cylinder fixedly connected to the side of the annular side baffle. The end of the cylinder is fixedly connected to a communication port connected to a communication pipe. A connecting rod is slidably connected to one end of the cylinder. A rubber sealing head opposite to the mixing gas inlet is fixedly connected to one end of the connecting rod. A piston plate is fixedly connected to the end of the connecting rod located inside the cylinder. The piston plate and the inner wall of the cylinder are interference-fitted.

[0016] Furthermore, a tension spring is fixedly connected between the piston plate and the inner wall of the cylinder at the end away from the rubber sealing head.

[0017] Furthermore, the filter body includes a filter screen support fixedly connected inside the isolation chamber body, and a cylindrical filter screen is fixedly connected inside the filter screen support.

[0018] The technical effects achieved by this utility model are as follows:

[0019] The isolation chamber device of this utility model for a blood cell analyzer can prevent liquids such as liquid films and microdroplets from entering the mixing gas inlet through a fixed blocking part, thereby reducing the amount of liquid entering the mixing gas inlet. When the liquid level inside the isolation chamber rises to the warning height, the movable blocking part acts as an emergency treatment device to seal the mixing gas inlet. When the buoyancy component rises, it drives the airbag to move to the mixing gas inlet to seal it. This further reduces the phenomenon of liquid from inside the isolation chamber entering the mixing gas inlet when the waste liquid outlet or waste liquid discharge pipeline fails. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a side view of the cross-sectional structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the structure of one type of movable blocking part of this utility model;

[0024] Figure 5 This is a cross-sectional structural diagram of one of the movable blocking parts of this utility model.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Main body of the isolation chamber; 2. Top cover; 3. Waste liquid outlet; 4. Mixing gas inlet; 5. Reaction tank connection port; 6. Filter screen support; 7. Cylindrical filter screen; 8. Annular upper baffle; 9. Annular side baffle; 10. Annular hollow shell; 11. Buoyancy component; 12. Support rod; 13. Annular plate; 14. Connecting pipe; 15. Airbag; 16. Cylinder; 17. Rubber sealing head; 18. Connecting port; 19. Piston plate; 20. Connecting rod; 21. Tension spring. Detailed Implementation

[0027] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0028] like Figures 1-5 As shown, an isolation chamber device for a blood cell analyzer includes an isolation chamber body 1, a waste liquid outlet 3 fixedly connected to the lower side of the outer side of the isolation chamber body 1, the waste liquid outlet 3 being used to connect to the waste liquid discharge pipeline of the blood cell analyzer, and a mixing gas inlet 4 fixedly connected to the upper side of the outer side of the isolation chamber body 1, the mixing gas inlet 4 being used to connect to the mixing gas pipeline of the blood cell analyzer.

[0029] The upper side of the isolation chamber body 1 is fixedly connected to the top cover 2, which can be fixed by screw connection, snap-fit ​​or threaded connection. The upper side of the top cover 2 is fixedly connected to the reaction pool connection port 5, which is used to connect the reaction pool. This part is a mature prior art, which has been disclosed in Chinese patent with authorization announcement number CN210294263U. It will not be described in detail in this technical solution.

[0030] A filter is fixedly connected inside the isolation chamber body 1 to filter impurities in the liquid. A gas channel is formed between the filter and the inner wall of the isolation chamber body 1 for the mixed gas to pass through.

[0031] Specifically, such as Figures 2-3 As shown, the filter body includes a filter support 6 fixedly connected inside the isolation chamber body 1. A cylindrical filter 7 is fixedly connected inside the filter support 6. The effective filtration area of ​​the cylindrical filter 7 can be increased through the cylindrical structure of the cylindrical filter 7.

[0032] like Figures 2-3 As shown, the main body 1 of the isolation chamber is also fixedly connected to a fixed blocking part opposite to the mixing gas inlet 4. When the mixing gas inlet 4 generates back suction, the fixed blocking part blocks liquid such as liquid film and micro-droplets from entering the mixing gas inlet 4, thereby reducing the amount of liquid entering the mixing gas inlet 4.

[0033] The fixed blocking part includes an annular upper baffle 8 fixedly connected to the inner wall of the isolation chamber body 1 and located above the mixing gas inlet 4. An annular side baffle 9 is fixedly connected to the inner circular surface of the annular upper baffle 8. The annular side baffle 9 is opposite to the mixing gas inlet 4. At this time, when liquid falls at the reaction tank connection port 5, the annular upper baffle 8 and the annular side baffle 9 can block the falling liquid, thereby reducing the amount of liquid drawn into the mixing gas inlet 4 due to the negative pressure suction at the mixing gas inlet 4 when the liquid falls.

[0034] The main body 1 of the isolation chamber is also equipped with a buoyancy component 11 and a movable blocking part that is connected to the buoyancy component 11. The buoyancy component 11 can be a ring-shaped plastic ring. When the liquid level inside the main body 1 of the isolation chamber rises to the warning height, the liquid inside the main body 1 of the isolation chamber exerts an upward buoyancy force on the buoyancy component 11. When the buoyancy component 11 rises, it drives the airbag 15 to move to the mixing gas inlet 4 to block the mixing gas inlet 4. In the event of a failure in the waste liquid outlet 3 or the waste liquid discharge pipeline, the movable blocking part can be used as an emergency treatment device to seal the mixing gas inlet 4, thereby reducing the phenomenon of liquid inside the main body 1 entering the mixing gas inlet 4.

[0035] Here, the liquid level warning height inside the isolation chamber body 1 can be 1 / 2 of the height of the isolation chamber body 1, that is, the height of the isolation chamber body 1 is H, and the liquid level warning height inside the isolation chamber body 1 is H / 2.

[0036] The movable blocking part can be directly fixedly connected to the upper side of the buoyancy member 11, and the movable blocking part moves synchronously when the buoyancy member 11 moves.

[0037] The movable blocking part can also be like Figures 2-3 As shown, the movable blocking part is installed on the annular side baffle 9. The kinetic energy conversion component is installed inside the isolation chamber body 1. The movable blocking part is connected to the kinetic energy conversion component through a transmission. When the buoyancy component 11 rises, the kinetic energy conversion component drives the airbag 15 to move horizontally towards the direction close to the mixed gas inlet 4. The horizontal movement enables the movable blocking part to closely abut against the mixed gas inlet 4, thereby improving the sealing performance when blocking the mixed gas inlet 4.

[0038] The kinetic energy conversion component can be a gear and rack transmission assembly or a pneumatic transmission assembly.

[0039] like Figures 2-3As shown, the movable blocking part is a pneumatic extension sealing mechanism. The kinetic energy conversion component includes an annular hollow shell 10 fixedly connected to the inner wall of the isolation chamber body 1. An annular plate 13 is vertically slidably connected inside the annular hollow shell 10. Sealing rings that are interference fit with the inner wall of the annular hollow shell 10 are fixedly connected to the inner and outer circular surfaces of the annular plate 13. A support rod 12 is fixedly connected to the lower end of the annular hollow shell 10. A sliding hole is opened on the lower side of the annular hollow shell 10. The support rod 12 is slidably connected inside the sliding hole. The lower end of the support rod 12 is fixedly connected to the buoyancy member 11. A connecting pipe 14 is fixedly connected to the upper end of the annular hollow shell 10. The connecting pipe 14 is connected to the pneumatic extension sealing mechanism. When the pneumatic extension sealing mechanism inputs gas, it extends towards the direction close to the mixing gas inlet 4 until it reaches the mixing gas inlet 4 and seals the mixing gas inlet 4.

[0040] like Figures 2-3 As shown, Figure 2 and Figure 3 This is a schematic diagram of the isolation chamber device when the liquid level inside the main body 1 of the isolation chamber reaches the warning height. When the liquid level inside the main body 1 of the isolation chamber rises to the warning height, the buoyancy component 11 pushes the annular plate 13 to the top of the annular hollow shell 10 through the support rod 12, thereby pushing the air inside the annular hollow shell 10 into the pneumatic extension sealing mechanism. Air is input into the pneumatic extension sealing mechanism, so that the pneumatic extension sealing mechanism extends to abut against the mixed gas inlet 4, sealing the mixed gas inlet 4.

[0041] Among them, such as Figures 2-3 As shown, one structure of the pneumatic extension sealing mechanism is disclosed here. The pneumatic extension sealing mechanism includes an airbag 15 fixedly connected to the side of the annular side baffle 9. The airbag 15 is preferably made of latex. The connecting pipe 14 is connected to the airbag 15. At this time, after gas is input into the airbag 15 through the connecting pipe 14, the airbag 15 can be inflated and extended towards the mixing gas inlet 4. Its structure is relatively simple.

[0042] Among them, such as Figures 2-3As shown, another structure of the pneumatic extension sealing mechanism is disclosed here. The pneumatic extension sealing mechanism includes a cylinder 16 fixedly connected to the side of the annular side baffle 9. The end of the cylinder 16 is fixedly connected to a communication port 18 connected to the communication pipe 14. A connecting rod 20 is slidably connected to one end of the cylinder 16. A rubber sealing head 17 opposite to the mixing gas inlet 4 is fixedly connected to one end of the connecting rod 20. A piston plate 19 is fixedly connected to the end of the connecting rod 20 located inside the cylinder 16. The piston plate 19 and the inner wall of the cylinder 16 are interference fit. At this time, after gas is introduced into the cylinder 16 through the communication pipe 14, the piston plate 19 can be pressurized, so that the piston plate 19 drives the rubber sealing head 17 to move towards the mixing gas inlet 4 until the rubber sealing head 17 abuts against the mixing gas inlet 4, thus completing the sealing of the mixing gas inlet 4.

[0043] A tension spring 21 is fixedly connected between the piston plate 19 and the inner wall of the cylinder 16 at the end away from the rubber plug head 17. After the cylinder 16 exhausts air, the tension spring 21 can drive the rubber plug head 17 to reset and move.

[0044] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. An isolation chamber device for a blood cell analyzer, comprising an isolation chamber body (1), wherein a waste liquid outlet (3) is fixedly connected to the lower side of the outer side of the isolation chamber body (1), a mixing gas inlet (4) is fixedly connected to the upper side of the outer side of the isolation chamber body (1), a top cover (2) is fixedly connected to the upper side of the isolation chamber body (1), a reaction tank connection port (5) is fixedly connected to the upper side of the top cover (2), and a filter body is fixedly connected inside the isolation chamber body (1), characterized in that: The inside of the isolation chamber body (1) is also fixedly connected with a fixed blocking part opposite to the mixed gas inlet (4); The inside of the isolation chamber body (1) is also provided with a buoyancy member (11) and a movable blocking part in transmission connection with the buoyancy member (11), and when the buoyancy member (11) rises, the air bag (15) is driven to move to the mixed gas inlet (4) to block the mixed gas inlet (4).

2. The isolation chamber apparatus for a blood cell analyzer of claim 1, wherein: The fixed blocking part comprises an annular upper baffle (8) fixedly connected to the inner wall of the isolation chamber body (1) and located above the mixed gas inlet (4), and a ring of annular side baffles (9) is fixedly connected to the inner circular surface of the annular upper baffle (8), and the annular side baffles (9) are opposite to the mixed gas inlet (4).

3. The isolation chamber apparatus for a blood cell analyzer of claim 2, wherein: The movable blocking part is installed on the annular side baffles (9), and the inside of the isolation chamber body (1) is provided with a kinetic energy conversion assembly, the movable blocking part is in transmission connection with the movable blocking part through the kinetic energy conversion assembly, and when the buoyancy member (11) rises, the air bag (15) is driven to move horizontally towards the mixed gas inlet (4) through the kinetic energy conversion assembly.

4. The isolation chamber apparatus of claim 3, wherein: The movable blocking part is a pneumatic extension blocking mechanism, and when the pneumatic extension blocking mechanism inputs gas, it extends towards the mixed gas inlet (4); The kinetic energy conversion assembly comprises an annular hollow shell (10) fixedly connected to the inner wall of the isolation chamber body (1), an annular plate (13) vertically slidably connected in the annular hollow shell (10), a support rod (12) fixedly connected to the lower end of the annular hollow shell (10), a sliding hole formed in the lower side of the annular hollow shell (10), the support rod (12) slidably connected in the sliding hole, the lower end of the support rod (12) fixedly connected with the buoyancy member (11), and a communication pipe (14) fixedly connected to the upper end of the annular hollow shell (10) and in communication with the pneumatic extension blocking mechanism.

5. The isolation chamber apparatus of claim 4, wherein: The pneumatic extension blocking mechanism comprises an air bag (15) fixedly connected to the side of the annular side baffle (9), and the communication pipe (14) is in communication with the air bag (15).

6. The isolation chamber apparatus for a blood cell analyzer of claim 4, wherein: The pneumatic extension blocking mechanism comprises a cylinder (16) fixedly connected to the side of the annular side baffle (9), a communication port (18) fixedly connected to the end of the cylinder (16) and in communication with the communication pipe (14), a connecting rod (20) slidably connected to one end of the cylinder (16), a rubber blocking head (17) fixedly connected to one end of the connecting rod (20) and opposite to the mixed gas inlet (4), a piston plate (19) fixedly connected to one end of the connecting rod (20) located in the cylinder (16), and the piston plate (19) is in interference fit with the inner wall of the cylinder (16).

7. The isolation chamber apparatus of a blood cell analyzer according to claim 6, wherein: The piston plate (19) and the inner wall of the cylinder (16) away from the rubber blocking head (17) are fixedly connected with a tension spring (21).

8. The isolation chamber apparatus of a blood cell analyzer according to claim 1, wherein: The filter body comprises a filter screen support (6) fixedly connected in the inside of the isolation chamber body (1), and a cylindrical filter screen (7) fixedly connected in the inside of the filter screen support (6).

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