Biological needle high-efficiency gas mist spraying cleaning device

Abstract

The application discloses a kind of biological needle high-efficiency aerosol spray cleaning device, it is related to sample detection technical field, including cleaning tank, cleaning tank is equipped with cleaning cavity, the liquid storage tank in the cleaning tank, it further includes at least one liquid storage tank with cleaning cavity intercommunication's liquid delivery channel, liquid storage tank top end is connected with liquid inlet channel and gas inlet channel, and the height of the outlet of liquid inlet channel and gas inlet channel in cleaning tank is all greater than the height of liquid storage channel in cleaning tank.The bottom end of the liquid storage tank is connected with the bottom groove extending towards the directly below of the liquid delivery channel, and the bottom groove is connected with the drainage channel penetrating all liquid delivery channels.The cross-sectional area of the drainage channel in its extension direction is less than the cross-sectional area of the liquid delivery channel in its extension direction, and the cross-sectional area of the liquid delivery channel in its extension direction is less than the cross-sectional area of the liquid storage tank in the vertical direction.The biological needle can be cleaned by using high-speed cleaning liquid, high-speed aerosol and high-speed gas in sequence, and the cleaning is thorough.

Description

Technical Field

[0001] This invention relates to the field of sample testing technology, specifically to a high-efficiency aerosol spray device for biological needles. Background Technology

[0002] During sample testing, samples need to be transferred to various sample tubes for analysis. This process requires the use of biological probes to pipette various types of liquid samples. If other substances are present in the sample during pipetting, they can affect the analytical results. Therefore, it is necessary to clean the biological probes used for pipetting. However, current cleaning methods use peristaltic pumps to deliver cleaning fluid to the biological probes, resulting in low pressure, low flow rate, and incomplete cleaning.

[0003] Existing sampling needles, as described in Chinese Patent Application No. 201910168223.1, can blow away residual water by cleaning the needle tip with water after cleaning the needle, thus ensuring the cleanliness of the needle. However, because the water flow and air flow use different channels before being sprayed onto the needle body, space is wasted, and the water flow speed is slow, resulting in incomplete cleaning. Summary of the Invention

[0004] The purpose of this invention is to provide a high-efficiency aerosol spray cleaning device for biological needles, which can use high-speed cleaning fluid, high-speed aerosol, and high-speed gas sequentially to clean biological needles thoroughly.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0006] A high-efficiency aerosol spray cleaning device for biological needles includes a cleaning tank for inserting and cleaning the needle body. The cleaning tank has a cleaning chamber for inserting the needle body, and a storage tank for storing cleaning fluid. It also includes at least one infusion channel connecting the storage tank and the cleaning chamber. The top of the storage tank is connected to an inlet channel and an air inlet channel. The outlet heights of both the inlet and air inlet channels within the cleaning tank are greater than the height of the storage channel within the cleaning tank. Its function is as follows: First, the biological probe needle body is inserted into the cleaning chamber. Before cleaning, cleaning fluid is introduced into the storage tank through the inlet channel. Then, the infusion is paused, and high-pressure gas is introduced into the storage tank through the air inlet channel. Under the action of the high-pressure gas, the cleaning fluid is sprayed onto the biological probe needle body in the cleaning chamber through the infusion channel. After the liquid level in the cleaning tank is lower than that in the infusion channel, the high-speed airflow directly sprays onto the biological probe needle body, effectively blowing away any moisture adhering to the surface of the needle body.

[0007] Furthermore, the cleaning chamber is equipped with at least two infusion channels distributed at different heights within the chamber. This design allows for thorough cleaning of the needle at various heights.

[0008] Furthermore, the bottom of the storage tank is connected to a bottom groove extending directly below the infusion channels, and a drainage channel running through all the infusion channels is connected to the bottom groove. The cross-sectional area of ​​the drainage channel in its extending direction is smaller than that of the infusion channels in their extending direction, and the cross-sectional area of ​​the infusion channels in their extending direction is smaller than that of the storage tank in the vertical direction. Its function is that, through the drainage channel, when the liquid level in the cleaning tank is lower than that of the infusion channels, a high-speed airflow will pass through the infusion channels. At this time, the pressure in the drainage channel will decrease. According to Bernoulli's principle, the cleaning fluid will be drawn up from the bottom groove through the drainage channel and mixed with the high-speed airflow or atomized into mist. This high-speed mist cleans the needle body, making it difficult for droplets to adhere to the needle surface.

[0009] Furthermore, the infusion channel has a nozzle at its outlet within the cleaning chamber, with a spray hole at its center. The inner diameter of the spray hole is smaller than the inner diameter of the infusion channel. The spray hole is a micro-through hole or an array of micro-through holes. Its function is to accelerate the fluid flowing through the nozzle by reducing its cross-sectional area through the spray hole.

[0010] Furthermore, the end of the spray nozzle facing the cleaning chamber is connected to an expansion groove, the inner diameter of which gradually increases along the direction towards the cleaning chamber. Its function is to allow the fluid sprayed from the spray nozzle to diffuse and be sprayed onto the needle body.

[0011] Furthermore, the air intake channel is connected to an air pipe, which in turn is connected to a reversing valve for connecting to an air source. The reversing valve is a two-position three-way valve, and the air source is a nitrogen gas source.

[0012] Furthermore, the liquid inlet channel is connected to an inlet pipe, which in turn is connected to a water pump for connecting to a water source. The water pump is a peristaltic pump.

[0013] Furthermore, the cleaning chamber is equipped with at least two sets of infusion channel groups. Each set of infusion channel groups contains at least two infusion channels located on the same vertical plane at different heights. The angle between any two adjacent sets of infusion channel groups is greater than 90° and less than 120°. This design, by creating a certain angle between adjacent sets of different infusion channels, avoids the phenomenon where liquid adheres to the back of the biological probe and is difficult to remove after using only a single set of infusion channel groups, thus ensuring a more thorough cleaning of the biological probe.

[0014] Furthermore, the cleaning tank includes a front cover mounted on the side wall, which is sealed to the cleaning tank to form a cleaning chamber. The front cover has a drain hole, which, when the front cover is installed on the cleaning tank, communicates with the bottom of the cleaning chamber. The height of the drain hole is lower than the height of the lowest infusion channel. The sealing connection can employ any existing sealing technology, such as connecting the front cover and the cleaning tank with screws, and using a sealing ring between the front cover and the cleaning tank.

[0015] Furthermore, the cleaning tank includes a bottom plate disposed on the bottom surface, and the bottom plate and the cleaning tank are sealed together to form a bottom groove. The sealing connection can adopt any existing sealing connection technology, such as the bottom plate and the cleaning tank being connected by screws, and a sealing ring being provided between the bottom plate and the cleaning tank.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. By setting up a storage tank, infusion channel, inlet channel, and air inlet channel, the biological probe needle body is first inserted into the cleaning chamber. Before cleaning, the cleaning solution is first introduced into the storage tank through the inlet channel. Then, the introduction of the cleaning solution is paused, and high-pressure gas is introduced into the storage tank through the air inlet channel. Under the action of high-pressure gas, the cleaning solution is sprayed into the biological probe needle body in the cleaning chamber through the infusion channel. After the liquid level in the cleaning tank is lower than that in the infusion channel, the high-speed airflow is directly sprayed onto the biological probe needle body, which can blow away the water adhering to the surface of the biological probe needle body.

[0018] 2. By setting up the drainage channel, when the liquid level in the cleaning tank is lower than that in the infusion channel, a high-speed airflow will pass through the infusion channel. At this time, the pressure in the drainage channel will decrease. According to Bernoulli's principle, the cleaning fluid will be drawn up from the bottom tank through the drainage channel and mixed with the high-speed airflow or form an aerosol. The high-speed aerosol is used to clean the needle body, making it difficult for droplets to adhere to the surface of the needle body.

[0019] 3. This invention has a simple structure, is easy to operate, is pollution-free, has high pressure and high flow rate, and can be used in places where cross-contamination of biological probes is avoided during operation;

[0020] 4. This invention also features modularity and specialization; modularity: it can be configured with corresponding models of equipment according to actual application conditions, thus fulfilling the corresponding working conditions in relevant equipment; specialization: the system possesses advanced technology, and the flow channels and flow rates of the liquids are precisely calculated and designed. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of Example 1;

[0022] Figure 2 This is a three-dimensional exploded view of the cleaning tank;

[0023] Figure 3This is a schematic diagram of the three-dimensional structure of the nozzle;

[0024] Figure 4 This is a cross-sectional view of the cleaning tank at the height of the infusion channel;

[0025] Figure 5 This is a cross-sectional view of the cleaning box in the plane of an infusion unit.

[0026] Figure 6 This is a schematic diagram of the working state when the liquid level in the cleaning tank is higher than all infusion channels;

[0027] Figure 7 This is a schematic diagram of the working state when the liquid level in the cleaning tank is lower than the second highest infusion channel.

[0028] Figure 8 This is a schematic diagram showing the working state after the cleaning fluid in the cleaning tank has been exhausted.

[0029] Attached reference numerals: 1. Cleaning tank; 2. Cleaning chamber; 3. Storage tank; 4. Infusion channel; 5. Inlet channel; 6. Air inlet channel; 7. Bottom tank; 8. Drainage channel; 9. Nozzle; 10. Spray hole; 11. Expansion groove; 12. Air pipe; 13. Reversing valve; 14. Inlet pipe; 15. Water pump; 16. Front cover; 17. Base plate; 18. Infusion channel assembly; 19. Drain hole; 20. Needle body; a. Liquid flow; b. Aerosol; c. Airflow. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0031] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "longitudinal," "lateral," "horizontal," "inner," "outer," "front," "rear," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] Example 1

[0034] A high-efficiency aerosol spray cleaning device for biological needles, such as Figure 1 As shown, it includes a cleaning box 1 for placing the needle body 20 and cleaning the needle body 20, such as Figure 2 As shown, the cleaning tank 1 has a cleaning chamber 2 for inserting the needle 20. The cleaning tank 1 also includes a storage tank 3 for storing cleaning fluid, and at least one infusion channel 4 connecting the storage tank 3 and the cleaning chamber 2. The top of the storage tank 3 is connected to an inlet channel 5 and an air inlet channel 6. The outlet heights of both the inlet channel 5 and the air inlet channel 6 within the cleaning tank 1 are greater than the height of the storage channel within the cleaning tank 1. The cleaning tank 1, infusion channel 4, storage tank 3, and inlet channel 5 are all made of PEEK material to prevent contamination of the cleaning fluid. Its function is as follows: through the arrangement of the storage tank 3, the infusion channel 4, the inlet channel 5, and the air inlet channel 6, the biological probe needle 20 is first inserted into the cleaning chamber 2. Before cleaning, the cleaning liquid is first introduced into the storage tank 3 through the inlet channel 5. Then, the introduction of the cleaning liquid is paused, and high-pressure gas is introduced into the storage tank 3 through the air inlet channel 6. Under the action of the high-pressure gas, the cleaning liquid is sprayed into the biological probe needle 20 in the cleaning chamber 2 through the infusion channel 4. After the liquid level in the cleaning tank 1 is lower than that in the infusion channel 4, the high-speed airflow c is directly sprayed onto the biological probe needle 20, which can blow away the water adhering to the surface of the biological probe needle 20.

[0035] Specifically, such as Figure 5 As shown, the cleaning tank 1 is equipped with at least two infusion channels 4 distributed at different heights within the cleaning tank 1. The purpose of this design is to allow for cleaning of the needle body 20 at different heights, resulting in a more comprehensive cleaning.

[0036] Specifically, such as Figure 5As shown, the bottom end of the storage tank 3 is connected to a bottom groove 7 extending directly below the infusion channel 4. A drainage channel 8, penetrating all the infusion channels 4, is connected to the bottom groove 7. The cross-sectional area of ​​the drainage channel 8 in its extending direction is smaller than that of the infusion channel 4 in its extending direction, and the cross-sectional area of ​​the infusion channel 4 in its extending direction is smaller than that of the storage tank 3 in the vertical direction. Its function is that, through the drainage channel 8, when the liquid level in the cleaning tank 1 is lower than that in the infusion channel 4, a high-speed airflow c will pass through the infusion channel 4. At this time, the pressure in the drainage channel 8 will decrease. According to Bernoulli's principle, the cleaning fluid will be drawn up from the bottom groove 7 through the drainage channel 8 and react with the high-speed airflow c or form an aerosol b. The high-speed aerosol b is used to clean the needle body 20, making it difficult for droplets to adhere to the surface of the needle body 20.

[0037] Specifically, such as Figure 4 As shown, the infusion channel 4 is equipped with a nozzle 9 at the outlet inside the cleaning chamber 2, such as... Figure 3 As shown, the nozzle 9 has a spray hole 10 at its center, and the inner diameter of the spray hole 10 is smaller than the inner diameter of the infusion channel 4. The spray hole 10 is a tiny through hole with a diameter of 0.1 mm. When the hydraulic pressure in the cleaning tank 1 is too low, the small diameter of the hole prevents a large amount of fluid from flowing out of the cleaning tank 1, allowing the fluid level in the cleaning tank 1 to rise above the height of the highest infusion channel 4. Its function is to accelerate the fluid flowing through the nozzle 9 by reducing the cross-sectional area of ​​the spray hole 10.

[0038] Specifically, such as Figure 3 As shown, the end of the spray nozzle 10 facing the cleaning chamber 2 is connected to an expansion groove 11, the inner diameter of which gradually increases along the direction towards the cleaning chamber 2. Its function is to allow the fluid sprayed from the spray nozzle to diffuse and spray towards the needle body 20 through the expansion groove 11.

[0039] Specifically, such as Figure 1 As shown, the air intake channel 6 is connected to an air pipe 12, and the air pipe 12 is connected to a reversing valve 13 for connecting to an air source. The reversing valve 13 is a two-position three-way valve, and the air source is a nitrogen gas source.

[0040] Specifically, such as Figure 1 As shown, the liquid inlet channel 5 is connected to a liquid inlet pipe 14, and the liquid inlet pipe 14 is connected to a water pump 15 for connecting to a water source. The water pump 15 is a peristaltic pump.

[0041] Specifically, such as Figure 5As shown, the cleaning tank 1 is equipped with two sets of infusion channel groups 18. Each set of infusion channel groups 18 contains four infusion channels 4 located on the same vertical plane at different heights. The included angle between any two adjacent sets of infusion channel groups 18 is greater than 90° and less than 120°. This design, by creating a certain angle between adjacent sets of different infusion channel groups 18, avoids the phenomenon where liquid adheres to the back of the biological probe needle body 20 and is difficult to remove after using only a single set of infusion channel groups 18, thus making the cleaning of the biological probe more thorough.

[0042] Specifically, such as Figure 5 As shown, the cleaning tank 1 includes a front cover 16 disposed on the side wall, and the front cover 16 is sealed to the cleaning tank 1 to form a cleaning chamber 2. The front cover 16 has a drain hole 19. When the front cover 16 is installed on the cleaning tank 1, the drain hole 19 is connected to the bottom end of the cleaning chamber 2, and the height of the drain hole 19 is lower than the height of the lowest infusion channel 4. The sealing connection can use any existing sealing connection technology, such as the front cover 16 being connected to the cleaning tank 1 by screws, and a sealing ring being provided between the front cover 16 and the cleaning tank 1.

[0043] Specifically, such as Figure 5 As shown, the cleaning tank 1 includes a bottom plate 17 disposed on the bottom surface, and the bottom plate 17 is sealed to the cleaning tank 1 to form a bottom groove 7. The sealing connection can adopt any existing sealing connection technology, such as the bottom plate 17 being connected to the cleaning tank 1 by screws, and a sealing ring being provided between the bottom plate 17 and the cleaning tank 1.

[0044] The working principle of this embodiment is explained as follows: First, the needle body 20 is inserted into the cleaning chamber 2, the reversing valve 13 is closed, so that the inside of the cleaning tank 1 is connected to the atmosphere, and the water pump 15 is started to pump the cleaning liquid in the cleaning liquid bottle (not shown in the figure) into the cleaning tank 1 through the liquid inlet pipe 14 and store it in the liquid storage tank 3, so that the liquid level in the liquid storage tank 3 is higher than the highest infusion channel 4.

[0045] Then, shut off the water pump 15 to cut off the liquid inlet pipe 14, open the reversing valve 13 to connect the inside of the cleaning tank 1 with the compressed air source, and the compressed gas flows into the cleaning tank 1 through the air pipe 12. The compressed gas acts on the top surface of the cleaning liquid in the cleaning tank 1 to increase the pressure of the cleaning liquid.

[0046] like Figure 6 As shown, the high-pressure cleaning fluid flow a passes through the storage tank 3, the delivery channel 4, and the nozzle 9 in sequence to spray onto the surface of the biological probe needle body 20 to be cleaned.

[0047] like Figure 7As shown, when the level of the cleaning fluid is lower than that of the infusion channel 4, the infusion channel 4 only passes through compressed gas. Since the gas velocity is much greater than the liquid velocity, the cleaning fluid that is lower than that of the infusion channel 4 will be drawn into the infusion channel 4 through the drainage channel 8 and mixed with the high-speed airflow c to form a mist b, which is sprayed out through the spray hole 10 in the center of the nozzle 9 to further clean the surface of the biological probe needle body 20. Since the cleaning component at this time is a mist b and the flow rate is very high, water droplets are difficult to adhere to the surface of the biological probe needle body 20.

[0048] like Figure 8 As shown, when the cleaning fluid in the cleaning tank 1 is exhausted, the airflow through the nozzle 9 is all compressed air c, and the flow rate is further increased, which can blow away the moisture adhering to the surface of the biological needle.

[0049] During the cleaning process of the biological probe needle body 20 using cleaning solution, the aqueous solution of contaminants adhering to the surface of the biological probe is discharged through the drain hole 19 on the front cover 16 and collected in the waste liquid tank for centralized treatment.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Based on the technical essence of the present invention, any simple modifications, equivalent substitutions, and improvements made to the above embodiments within the spirit and principles of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A high-efficiency aerosol spray cleaning device for biological needles, comprising a cleaning box (1) for placing and cleaning the needle body, wherein the cleaning box (1) is provided with a cleaning chamber (2) for inserting the needle body, characterized in that: The cleaning tank (1) is provided with a storage tank (3) for storing cleaning fluid, and also includes at least one infusion channel (4) that connects the storage tank (3) to the cleaning chamber (2). The top of the storage tank (3) is connected to an inlet channel (5) and an air inlet channel (6). The height of the outlet of the inlet channel (5) and the air inlet channel (6) in the cleaning tank (1) is greater than the height of the infusion channel (4) in the cleaning tank (1). The cleaning tank (1) is provided with at least two infusion channels (4) distributed at different heights inside the cleaning tank (1). The bottom end of the storage tank (3) is connected to a bottom groove (7) extending directly below the infusion channel (4), and the bottom groove (7) is connected to a drainage channel (8) that runs through all the infusion channels (4). The infusion channel (4) has a nozzle (9) at the outlet inside the cleaning chamber (2), and a spray hole (10) is provided at the center of the nozzle (9). The inner diameter of the spray hole (10) is smaller than the inner diameter of the infusion channel (4). The spray hole (10) is connected to an expansion groove (11) at one end facing the cleaning chamber (2), and the inner diameter of the expansion groove (11) gradually increases along the direction towards the cleaning chamber (2). The cleaning box (1) includes a front cover (16) on the side wall. The front cover (16) is sealed to the cleaning box (1) to form a cleaning chamber (2). The front cover (16) is provided with a drain hole (19). When the front cover (16) is installed on the cleaning box (1), the drain hole (19) is connected to the bottom of the cleaning chamber (2). The height of the drain hole (19) is lower than the height of the lowest infusion channel (4).

2. The high-efficiency aerosol spray cleaning device for biological needles according to claim 1, characterized in that: The air intake channel (6) is connected to an air pipe (12), and the air pipe (12) is connected to a reversing valve (13) for connecting to an air source.

3. The high-efficiency aerosol spray cleaning device for biological needles according to claim 1, characterized in that: The liquid inlet channel (5) is connected to the liquid inlet pipe (14), and the liquid inlet pipe (14) is connected to the water pump (15) for connecting to the water source.

4. The high-efficiency aerosol spray cleaning device for biological needles according to claim 1, characterized in that: The cleaning box (1) is provided with at least two sets of infusion channels (18), each set of infusion channels (18) is provided with at least two infusion channels (4) located on the same vertical plane and at different heights, and the included angle between any two adjacent sets of infusion channels (18) is greater than 90° and less than 120°.

5. The high-efficiency aerosol spray cleaning device for biological needles according to claim 1, characterized in that: The cleaning tank (1) includes a bottom plate (17) on the bottom surface, and the bottom plate (17) and the cleaning tank (1) are sealed together to form a bottom groove (7).

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