Sample adding needle cleaning device and sample adding needle cleaning system with same

Abstract

The utility model relates to a sample needle cleaning device, a sample adding needle cleaning system with the same and a cleaning method. The sampling needle cleaning device comprises a first pipe body, a second pipe body and a third pipe body which are sequentially communicated, a cleaning channel is formed in the second pipe body and used for containing a to-be-cleaned sampling needle, and the second pipe body is provided with a plurality of ultrasonic generation modules. And each ultrasonic generation module can generate ultrasonic waves and superpose the ultrasonic waves in the cleaning channel to form an ultrasonic sound field. The sampling needle cleaning device is provided with a plurality of ultrasonic generation modules, has the advantages of turbulence cleaning and ultrasonic cleaning at the same time, and prevents damage to the sampling needle and improves the cleaning effect while achieving miniaturization of the device.

Description

Technical Field

[0001] This utility model relates to the field of liquid cleaning, specifically to a needle cleaning device and a needle cleaning system having the same. Background Technology

[0002] In fields such as life science research, in vitro diagnostics, drug development, and chemical analysis, automated sample loading systems have gradually replaced traditional manual sample loading methods, becoming a very important tool that greatly improves experimental efficiency and accuracy while reducing human error and operational risks.

[0003] The sampling needle is a core component of an automated sampling system, playing a crucial role in the process. However, due to its frequent contact with various reagents and samples, the sampling needle is susceptible to contamination, which can affect the accuracy and reliability of experimental results. If the sampling needle is not thoroughly cleaned, cross-contamination between different samples will inevitably occur, easily leading to false positive results. Therefore, cleaning the sampling needle is an essential and indispensable step.

[0004] Existing needle cleaning devices often employ high-pressure turbulent cleaning or ultrasonic cleaning. While turbulent cleaning causes less damage to the needle, it is time-consuming and cannot guarantee the cleaning effect on difficult-to-remove contaminants such as fibrin. Furthermore, in order to ensure water pressure in the pipeline, the flow channel of the needle washing cup is relatively narrow, which increases the accuracy requirements for inserting the needle into the needle washing cup and also requires the use of a special cleaning solution.

[0005] While ultrasonic cleaning has low requirements for the shape of the cleaning device and can complete cleaning in a short time under normal water flow, it also has a good cleaning effect on difficult-to-remove contaminants such as fibrous proteins. However, existing ultrasonic cleaning devices are all single-oscillator excited, requiring a large-sized oscillator to provide cleaning energy. In addition, the sound field inside the cleaning channel chamber is a non-uniform field, resulting in a generally large device size and uneven cleaning. Utility Model Content

[0006] In view of this, the present invention provides a needle cleaning device and a needle cleaning system having the same, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0007] To achieve the aforementioned objectives, a first aspect of this utility model provides a needle cleaning device, comprising a first tube, a second tube, and a third tube connected in sequence, wherein the interiors of the first tube, the second tube, and the third tube are sequentially connected to form a cleaning channel.

[0008] Multiple ultrasonic generating modules are provided at the second pipe body of the cleaning channel. Each ultrasonic generating module can generate ultrasonic waves, which are superimposed in the cleaning channel to form an ultrasonic sound field.

[0009] In the sample needle cleaning device described above, optionally, both ends of the second tube are provided with ultrasonic generating modules, which are used to provide ultrasonic sound fields from both ends to the corresponding cleaning channels of the second tube.

[0010] In the sample needle cleaning device described above, optionally, the first tube, the second tube, and the third tube of the sample needle cleaning device are a straight tube that is integrally connected.

[0011] In the sample needle cleaning device described above, optionally, the first tube body and the second tube body are connected to each other, and the second tube body and the third tube body are connected to each other by connecting screws. The connecting screws have internal through holes, and the internal through holes communicate with the interiors of the first tube body, the second tube body, and the third tube body to jointly form the cleaning channel.

[0012] In the sample needle cleaning device described above, optionally, the ultrasonic generating module includes a piezoelectric ceramic and an electrode plate connected to the piezoelectric ceramic. The piezoelectric ceramic is in the shape of a ring, and the outer diameter of the piezoelectric ceramic is the same as the outer diameter of the second tube. The electrode plate protrudes from the outer periphery of the piezoelectric ceramic.

[0013] In the sample needle cleaning device described above, optionally, the middle part of the connecting screw passes through the annular hole of the piezoelectric ceramic of the ultrasonic generating module, and the tubes connected to both ends of the connecting screw press the piezoelectric ceramic from both ends of the piezoelectric ceramic by threaded engagement with the connecting screw.

[0014] In the sample needle cleaning device described above, optionally, the connecting screw includes a connecting screw body, with end grooves at both ends of the connecting screw body and circumferential grooves near both ends of the connecting screw body. The end grooves are used to place end sealing rings, and the circumferential grooves are used to place circumferential sealing rings.

[0015] In the sample needle cleaning device described above, optionally, the sample needle cleaning device is provided with a plurality of second tubes, the plurality of second tubes are interconnected to expand the cleaning channel, and each of the second tubes is provided with the ultrasonic generating module at both ends.

[0016] In the sample needle cleaning device described above, optionally, the first tube body is provided with an inlet and an overflow port, the overflow port being closer to the port of the first tube body than the inlet, and the end of the third tube body is provided with an outlet.

[0017] To achieve the aforementioned objectives, a second aspect of this utility model provides a needle cleaning system, which includes a needle cleaning device, a hydraulic pump, a cleaning solution tank, a vacuum pump, and a waste solution tank as described above.

[0018] The first tube of the sample needle cleaning device is connected to the cleaning liquid tank via the hydraulic pump, the third tube is connected to the waste liquid tank via the vacuum pump, and the ultrasonic generator module located in the second tube is connected to different ultrasonic excitation signals.

[0019] This invention provides a needle cleaning device, which includes a first tube, a second tube, and a third tube connected in sequence. The second tube has a cleaning channel inside for placing the needle to be cleaned. The needle cleaning device can introduce high-pressure cleaning fluid from the first tube and create turbulence in the cleaning channel to clean the needle.

[0020] The second tube is also equipped with multiple ultrasonic generating modules, each capable of generating ultrasonic waves with a phase difference. These waves are superimposed within the cleaning channel of the second tube to form a uniform and appropriately intense ultrasonic sound field. This vibrates the cleaning fluid within the cleaning channel, creating supercavitation. This allows for ultrasonic cleaning of the sample dispensing needle based on turbulent cleaning. Therefore, the sample dispensing needle cleaning device of this invention combines the advantages of both turbulent and ultrasonic cleaning, ensuring effective cleaning while preventing damage to the sample dispensing needle.

[0021] Furthermore, this utility model also provides a needle cleaning system, which includes a needle cleaning device as described above, a hydraulic pump, a cleaning solution tank, a vacuum pump, and a waste liquid tank. The first tube of the needle cleaning device is connected to the cleaning solution tank via the hydraulic pump, and the third tube is connected to the waste liquid tank via the vacuum pump. Multiple ultrasonic generating modules located in the second tube are respectively connected to different ultrasonic excitation signals. This needle cleaning system has all the features of the aforementioned needle cleaning device, and therefore also possesses its corresponding advantages. Attached Figure Description

[0022] The disclosure of this utility model will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. (See the drawings.)

[0023] Figure 1 This is a perspective view of one embodiment of the sample dispensing needle cleaning device of this utility model.

[0024] Figure 2 for Figure 1 An exploded view of an embodiment of the sample needle cleaning device.

[0025] Figure 3 for Figure 1 A cross-sectional schematic diagram of an embodiment of the sample dispensing needle cleaning device.

[0026] Figure 4 for Figure 3 A partial enlarged view of an embodiment of the sample dispensing needle cleaning device, showing the first connecting screw.

[0027] Figure 5 This is a schematic diagram of one embodiment of the sample dispensing needle cleaning system of this utility model.

[0028] Figure 6 This is a schematic diagram illustrating the working principle of the ultrasonic cleaning system for the sample dispensing needle of this invention.

[0029] Figure 7 This is a perspective view of another embodiment of the sample dispensing needle cleaning device of this utility model.

[0030] Reference numerals: 1-First tube body; 11-First tube body; 12-Overflow port; 13-Inlet; 14-Port; 2-First ultrasonic generator module; 21-First piezoelectric ceramic; 22-First electrode plate; 23-First ultrasonic excitation signal; 24-First ultrasonic wave; 3-Second tube body; 31-Window; 4-Second ultrasonic generator module; 41-Second piezoelectric ceramic; 42-Second electrode plate; 43-Second ultrasonic excitation signal; 44-Second ultrasonic wave; 4 5-Third ultrasonic generator module; 5-Third tube body; 51-Third tube body; 52-Liquid outlet; 6-First connecting screw; 61-First connecting screw body; 62-Circumferential sealing ring; 63-End sealing ring; 64-Liquid inlet; 65-Liquid outlet; 66-Circumferential groove; 67-End groove; 7-Second connecting screw; 8-Cleaning channel; 81-Hydraulic pump; 82-Cleaning liquid tank; 83-Vacuum pump; 84-Sampling needle cleaning device; 86-Waste liquid tank. Detailed Implementation

[0031] Referring to the accompanying drawings and specific embodiments, the structure, composition, features and advantages of the sampling needle cleaning device of the present invention, as well as the sampling needle cleaning system having the same, will be described below by way of example. However, all descriptions should not be construed as limiting the present invention in any way.

[0032] Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the various drawings, the present invention still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacle. Therefore, these further embodiments according to the present invention should also be considered within the scope of the description herein.

[0033] It should also be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship of the sample needle cleaning device shown in the accompanying drawings. They are only for the convenience of describing this disclosure 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 disclosure.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0035] In the description of this disclosure, "multiple" means at least two, such as two, three or more, unless otherwise expressly and specifically limited.

[0036] Figure 1 This is a perspective view of one embodiment of the sample dispensing needle cleaning device of this utility model.

[0037] from Figure 1 As can be seen, the sample dispensing needle cleaning device 84 of this utility model includes a first tube 1, a second tube 3, and a third tube 5 connected in sequence. The second tube 3 has a cleaning channel 8 inside (e.g., Figure 3 (As shown). The first tube 1 is used to introduce high-pressure cleaning fluid into the cleaning channel of the second tube 3 to generate turbulence, so as to clean the sample needle to be cleaned placed in the cleaning channel 8. The waste liquid generated during cleaning is discharged from the third tube 5.

[0038] The second tube 3 can be equipped with multiple ultrasonic generating modules in its cleaning channel 8. Each module can generate ultrasonic waves, which are superimposed within the cleaning channel 8 to form an ultrasonic sound field. During cleaning, this ultrasonic sound field vibrates the cleaning fluid within the cleaning channel 8, causing supercavitation. These supercavitation bubbles can penetrate into the tiny pores and complex internal structures of the sample needle, achieving thorough cleaning. The superposition of ultrasonic waves generated by multiple modules makes the ultrasonic sound field more uniform, and the intensity of the ultrasonic sound field can be adjusted and controlled to achieve deep cleaning of the sample needle without damaging it.

[0039] Optionally, the ultrasonic generating module can also generate an ultrasonic sound field to the first tube 1 and / or the third tube 5 to clean the objects inside the first tube 1 and / or the third tube 5.

[0040] Therefore, it can be seen that the sample needle cleaning device 84 of this invention can achieve turbulent cleaning or turbulent cleaning combined with ultrasonic cleaning. Because ultrasonic cleaning is combined with turbulent cleaning, it can achieve better cleaning of the sample needle without dead angles, improving cleaning efficiency, and has low requirements for the cleaning solution, eliminating the need for a special cleaning solution. Therefore, the cleaning channel 8 of the sample needle cleaning device 84 of this invention does not need to be designed to be small to ensure the water pressure of the turbulent flow. The shape and size of the cleaning channel 8 can be set according to the specifications of the sample needle, increasing the capacity of the cleaning channel 8, thereby reducing the accuracy requirements for inserting the sample needle into the cleaning device.

[0041] exist Figure 1 In this embodiment, a first ultrasonic generating module 2 and a second ultrasonic generating module 4 are respectively provided at both ends of the second tube 3. The first ultrasonic generating module 2 and the second ultrasonic generating module 4 can generate ultrasonic waves. The ultrasonic waves enter the area cleaning channel 8 of the second tube 3 from both ends and are superimposed in the cleaning channel 8 to form an ultrasonic sound field.

[0042] The design of the first ultrasonic generating module 2 and the second ultrasonic generating module 4 at both ends of the second tube 3 facilitates the installation of the ultrasonic generating modules. With the ultrasonic generating modules located at both ends of the second tube 3, they can completely cover the interior of the cleaning channel 8, making control easy and achieving the desired cleaning effect with a minimal number of ultrasonic generating modules.

[0043] In other embodiments, multiple ultrasonic generating modules can also be installed in other parts of the second tube 3, such as, but not limited to, the middle or the side, as long as they can be superimposed to generate an ultrasonic sound field within the cleaning channel 8.

[0044] from Figure 1 As can also be seen in the embodiments, the first tube 1, the second tube 3 and the third tube 5 of the sample needle cleaning device 84 are a straight tube that is integrally connected. This straight tube design makes the overall structure of the sample needle cleaning device 84 simpler, smaller and more compact, and facilitates the control of turbulence and ultrasonic cleaning.

[0045] As shown in the figure, the first tube 1 has a liquid inlet 13 on its side near its port 14, and the third tube 5 has a liquid outlet 52 at its end. The liquid inlet 13 is used to introduce cleaning fluid from the outside, and the liquid outlet 52 is used to discharge waste liquid generated during cleaning. The port 14 of the first tube 1 is used to connect to an external gas, which can be, but is not limited to, the atmosphere or other gases that help with cleaning, to facilitate the flow of cleaning fluid within the needle cleaning device 84.

[0046] The integrated straight pipe design of the syringe cleaning device 84, from the inlet 13 to the outlet 52, prevents waste liquid from remaining in the dead zone of the device, thus preventing residual waste liquid from contaminating the syringe and reducing the difficulty of cleaning the device. Furthermore, as... Figure 1 As shown, the first tube 1 may also be provided with an overflow port 12 on the side near its port. The overflow port 12 is closer to the port of the first tube 1 than the liquid inlet 13. The overflow port 12 is used to prevent the cleaning liquid from overflowing from the port of the first tube 1 and causing pollution to the outside.

[0047] It should be noted that the cleaning solution can be a specially formulated cleaning solution, or it can be pure water, deionized water, special cleaning solution for sampling needles, etc. Different cleaning solutions can be used depending on the cleaning method.

[0048] Figure 2 for Figure 1 An exploded view of an embodiment of the sample needle cleaning device.

[0049] from Figure 2 It can be seen that the sample needle cleaning device 84 may also include a connecting screw, which is used for the connection between the first tube 1 and the second tube 3, and between the second tube 3 and the third tube 5.

[0050] Specifically, the connecting screw can be screwed into the interior of the sample needle cleaning device 84, combined with Figure 1 As can be seen, after the connecting screw is installed, it is completely embedded in the first pipe body 1, the second pipe body 3 and the third pipe body 5, and the middle part of the connecting screw can pass through the ultrasonic generating module. The connecting screw has an internal through hole, which is a cleaning channel for the cleaning fluid, that is, the cleaning fluid can flow into the next pipe through the through hole of the connecting screw.

[0051] The connection screw installed inside the needle cleaning device 84 makes the connection between the first tube 1, the second tube 3 and the third tube 5 tighter, making the structure of the needle cleaning device 84 compact, thus facilitating the disassembly and installation of the cleaning channel of the needle cleaning device 84.

[0052] exist Figure 2 In this embodiment, the sample needle cleaning device 84 is provided with a first connecting screw 6 and a second connecting screw 7. The first tube 1, the first ultrasonic generating module 2, and the second tube 3 are connected by the first connecting screw 6, and the second tube 3, the second ultrasonic generating module 4, and the third tube 5 are connected by the second connecting screw 7.

[0053] Specifically, the inlet end 64 of the first connecting screw 6 is threaded to the inside of the first tube 1, the middle part of the first connecting screw 6 passes through the first ultrasonic generating module 2, and the outlet end 65 of the first connecting screw 6 is connected to the second tube 3; the connection method of the second connecting screw 7 is the same as that of the first connecting screw 6, and will not be described again here.

[0054] exist Figure 2 In one embodiment, the outer diameters of the two ends of the first connecting screw 6 and the second connecting screw 7 are smaller than the outer diameter of the middle part.

[0055] In other embodiments, the first pipe body 1, the second pipe body 3, and the third pipe body 5 can be connected in other ways, such as, but not limited to, flange connection, welding, snap-fit, etc.

[0056] Furthermore, such as Figure 2 As shown, the second tube 3 may be provided with a viewing window 31, so that the cleaning of the sample dispensing needle inside the second tube 3 can be observed from the outside.

[0057] Figure 3 for Figure 1 A cross-sectional schematic diagram of an embodiment of the sample dispensing needle cleaning device.

[0058] from Figure 3 As can be seen from the internal structure of the sampling needle cleaning device 84 of this utility model, the internal through holes of the first tube 1, the second tube 3 to the third tube 5, and the connecting screw connecting the tubes together form an integral through cleaning channel 8. The sampling needle can be placed in the cleaning channel 8 and the cleaning solution can flow through it.

[0059] As can be clearly seen from the diagram, the cleaning channel 8 is a straight channel without bends or dead zones, allowing the cleaning fluid to flow smoothly through and out of the channel without any cleaning contaminants remaining. Furthermore, the straight channel design of the cleaning channel 8 allows for easy control of the flow rate of the cleaning fluid, enabling different levels of turbulent cleaning.

[0060] As can be clearly seen from the figure, the first tube body 1 of the sample needle cleaning device 84 includes a first tube body 11, an inlet 13 and an overflow port 12 located on the side of the first tube body 11.

[0061] As shown in the figure, the ultrasonic generating module of the second tube 3 includes a piezoelectric ceramic and an electrode plate connected to the piezoelectric ceramic. The following describes... Figure 3 The specific implementation examples will be described in detail.

[0062] exist Figure 3In this embodiment, the second tube 3 is provided with a first ultrasonic generating module 2 and a second ultrasonic generating module 4 at its two ends, respectively. The first ultrasonic generating module 2 includes a first piezoelectric ceramic 21 and a first electrode plate 22. Similarly, the second ultrasonic generating module 4 includes a second piezoelectric ceramic 41 and a second electrode plate 42. The shape and structure of the second ultrasonic generating module 4 are the same as those of the first ultrasonic generating module 2. Therefore, the ultrasonic generating module will be described below using the first ultrasonic generating module 2 as an example.

[0063] The first electrode 22 of the first ultrasonic generating module 2 is connected to the first piezoelectric ceramic 21. The first electrode 22 is used to transmit external excitation signals to the first piezoelectric ceramic 21 to excite the first piezoelectric ceramic 21 to generate ultrasonic waves.

[0064] Optionally, combined Figure 2 As shown, the first piezoelectric ceramic 21 can be circular in shape, and the outer diameter of the circular ring is the same as the outer diameter of the second tube 3, making the sample needle cleaning device 84 a straight tube with a uniform outer diameter. The middle part of the first connecting screw 6 passes through the circular hole of the first piezoelectric ceramic 21, and the first tube 1 and the second tube 3 connected to both ends of the first connecting screw 6 are pressed against the first piezoelectric ceramic 21 from both ends by threaded engagement with the first connecting screw 6. Thus, when the first piezoelectric ceramic 21 is subjected to an external excitation signal, it can send ultrasonic waves to the first tube 1 and / or the second tube 3 at both ends.

[0065] Furthermore, as shown in the figure, the first electrode 22 protrudes from the outer periphery of the first piezoelectric ceramic 21 to facilitate the connection of an external ultrasonic excitation signal.

[0066] The combination of the first piezoelectric ceramic 21 and the first electrode plate 22 in the first ultrasonic generating module 2 makes the shape of the first ultrasonic generating module 2 simple and compact, and easy to install.

[0067] exist Figure 3 In one embodiment, the first electrode 22 and the second electrode 42 can be respectively disposed on the same side of the sample needle cleaning device 84 to facilitate connection with an external ultrasonic excitation signal. In other embodiments, the first electrode 22 and the second electrode 42 can also be disposed on different sides as needed, as long as it facilitates connection with an external ultrasonic excitation signal.

[0068] As can also be seen from the figure, the third tube body 5 includes a third tube body 51 and a liquid outlet 52, which is located at the port of the third tube body 51.

[0069] As can be clearly seen from the figure, the first connecting screw 6 and the second connecting screw 7 are completely embedded inside the sample dispensing needle cleaning device 84 after installation.

[0070] Figure 4 for Figure 3 A partial enlarged view of an embodiment of the sample dispensing needle cleaning device, showing the first connecting screw.

[0071] As can be clearly seen from the figure, the first connecting screw 6 includes a connecting screw body 61. Combined with... Figure 3 It can be seen that the two ends of the first connecting screw body 61 are respectively provided with end grooves 67. The end grooves (67) are used to place the end sealing rings 63. The end sealing rings 63 can prevent the cleaning liquid from leaking at the end connection of the first connecting screw 6.

[0072] Furthermore, the first connecting screw body 61 is provided with circumferential grooves 66 near both ends. The circumferential grooves 66 are used to place circumferential sealing rings 62. The circumferential sealing rings 62 are used to further prevent the cleaning liquid from leaking at the end connection of the first connecting screw body 61.

[0073] It should be noted that the shape, structure and connection method of the second connecting screw 7 are the same as those of the first connecting screw 6, and will not be described again here.

[0074] Figure 5 This is a schematic diagram of one embodiment of the sample dispensing needle cleaning system of this utility model.

[0075] from Figure 5 As can be seen, the needle cleaning system includes a needle cleaning device 84, a hydraulic pump 81, a cleaning fluid tank 82, a vacuum pump 83, and a waste fluid tank 86.

[0076] Specifically, the inlet 13 of the first tube 1 of the sample needle cleaning device 84 is connected to the cleaning liquid tank 82 via a hydraulic pump 81, and the overflow port 12 of the first tube 1 is connected to the waste liquid tank 86. The outlet 52 of the third tube 5 is connected to the waste liquid tank 86 via a vacuum pump 83.

[0077] The first ultrasonic generating module 2 and the second ultrasonic generating module 4, located at the two ends of the second tube 3, are respectively connected to the first ultrasonic excitation signal 23 and the second ultrasonic excitation signal 43.

[0078] Figure 6 This is a schematic diagram illustrating the working principle of the ultrasonic cleaning system for the sample dispensing needle of this invention.

[0079] Figure 6The diagram shows the first piezoelectric ceramic 21 of the first ultrasonic generator module 2 and the second piezoelectric ceramic 41 of the second ultrasonic generator module 4 of the sample needle cleaning device 84. As can be seen from the diagram, the first ultrasonic wave 24 and the second ultrasonic wave 44 generated by the first piezoelectric ceramic 21 and the second piezoelectric ceramic 41, respectively, have a phase difference and superimpose each other during transmission within the cleaning channel 8 of the sample needle cleaning device 84. Since ultrasonic waves are directional, their intensity decreases with distance from the sound source. Therefore, controlling the superposition of ultrasonic waves generated by two or more sets of piezoelectric ceramics can result in a more uniform sound field within the cleaning channel 8, i.e., a more uniform sound pressure distribution of the ultrasonic sound field within the cleaning channel 8.

[0080] The intensity of the ultrasonic sound field can also be adjusted by superimposing the first ultrasonic wave 24 and the second ultrasonic wave 44 with a phase difference. As a result, the supercavitation generated by the ultrasonic wave in the cleaning fluid in the sample needle cleaning device 84 is more uniform, and its intensity is appropriate to ensure the cleaning intensity without damaging the sample needle.

[0081] The first ultrasonic excitation signal 23 and the second ultrasonic excitation signal 43 can be voltage signals, and the intensity of the ultrasonic field can be controlled by the voltage amplitude.

[0082] This invention further provides a method for cleaning a sampling needle, which employs the aforementioned sampling needle cleaning system, and will be described below in conjunction with... Figure 5 and Figure 6 Describe the cleaning method for this sampling needle:

[0083] Step A: Place the sample needle to be cleaned into the cleaning channel 8 of the second tube 3 of the sample needle cleaning device 84.

[0084] Step B: Start the vacuum pump 83 to create a vacuum in the cleaning channel 8 formed inside the first tube 1, the second tube 3, and the third tube 5 of the sample needle cleaning device 84.

[0085] Simultaneously, the hydraulic pump 81 draws the cleaning fluid from the cleaning fluid tank 82 and enters the cleaning channel 8 through the first tube 1. Adjusting the pressure of the hydraulic pump 81 and the vacuum pump 83 can control the flow rate of the cleaning fluid in the cleaning channel 8, thereby creating turbulence in the cleaning channel 8 to clean the sample needle, thus achieving turbulent cleaning.

[0086] Furthermore, turbulent cleaning is combined with ultrasonic cleaning:

[0087] Step C: The first ultrasonic generator module 2 and the second ultrasonic generator module 4 are excited by the first ultrasonic excitation signal 23 and the second ultrasonic excitation signal 43, respectively, so that they generate the first ultrasonic wave 24 and the second ultrasonic wave 44 with a phase difference.

[0088] The first ultrasonic wave 24 and the second ultrasonic wave 44 are superimposed in the cleaning channel 8 to form an ultrasonic sound field, so as to generate supercavitation in the cleaning fluid, thereby realizing turbulent combined with ultrasonic cleaning of the sample needle, ensuring cleaning power while preventing damage to the sample needle. Figure 7 This is a perspective view of another embodiment of the sample dispensing needle cleaning device of this utility model.

[0089] It is understandable that, since the first tube 1, the second tube 3, and the third tube 5 of the sample dispensing needle cleaning device 84 of this utility model adopt connecting screws (such as... Figure 2 (As shown) the connection, so these components can be easily disassembled and installed.

[0090] Therefore, depending on the situation of the sampling needle, such as a longer sampling needle or a larger required cleaning area, the number of second tubes 3 can be increased so that multiple second tubes 3 can be connected to each other to expand the cleaning channel 8 and the cleaning area of ​​the sampling needle. Furthermore, each second tube 3 is equipped with an ultrasonic generating module at both ends, which can further ensure that the ultrasonic sound field in the cleaning channel 8 of each second tube 3 is uniform and of appropriate intensity.

[0091] exist Figure 7 In this embodiment, the sample needle cleaning device 84 has two second tubes 3, which abut against each other and are respectively connected to the first tube 1 and the second tube 3. A first ultrasonic generating module 2 is provided at the connection point between the two second tubes 3 and the first tube 1, and a second ultrasonic generating module 4 is provided at the connection point with the third tube 5. A third ultrasonic generating module 45 is also provided between the two second tubes 3, so that the ultrasonic generating modules at both ends of each second tube 3 can generate ultrasonic waves, and an ultrasonic sound field is formed by superposition within the two second tubes 3.

[0092] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.

Claims

1. A sample dispensing needle cleaning device, characterized in that, The sample needle cleaning device (84) includes a first tube (1), a second tube (3) and a third tube (5), and the interiors of the first tube (1), the second tube (3) and the third tube (5) are connected in sequence to form a cleaning channel (8). The second tube (3) is provided with multiple ultrasonic generating modules (2, 4), each of which can generate ultrasonic waves and superimpose them in the cleaning channel to form an ultrasonic sound field.

2. The sample dispensing needle cleaning device as described in claim 1, characterized in that, Both ends of the second tube (3) are provided with ultrasonic generating modules (2, 4), which are used to provide ultrasonic sound fields from both ends to the corresponding areas of the second tube (3) in the cleaning channel.

3. The sample dispensing needle cleaning device as described in claim 1, characterized in that, The first tube (1), the second tube (3), and the third tube (5) of the sample dispensing needle cleaning device (84) are a straight tube that is integrally connected.

4. The sample dispensing needle cleaning device as described in claim 1, characterized in that, The first tube (1) and the second tube (3) are connected to each other, and the second tube (3) and the third tube (5) are connected by connecting screws (6, 7). The connecting screws (6, 7) have internal through holes, which communicate with the interiors of the first tube (1), the second tube (3), and the third tube (5) to form the cleaning channel.

5. The sample needle cleaning device as described in claim 4, characterized in that, The ultrasonic generating module (2, 4) includes piezoelectric ceramics (21, 41) and electrode plates (22, 42) connected to the piezoelectric ceramics (21, 41). The piezoelectric ceramics (21, 41) are in the shape of a ring, and the outer diameter of the piezoelectric ceramics (21, 41) is the same as the outer diameter of the second tube (3). The electrode plates (22, 42) protrude from the outer periphery of the piezoelectric ceramics (21, 41).

6. The sample dispensing needle cleaning device as described in claim 5, characterized in that, The middle part of the connecting screw (6, 7) passes through the annular hole of the piezoelectric ceramic (21, 41) of the ultrasonic generating module, and the tubes connected to both ends of the connecting screw (6, 7) press the piezoelectric ceramic (21, 41) from both ends by threading with the connecting screw.

7. The sample needle cleaning device as described in claim 5, characterized in that, The connecting screw (6, 7) includes a connecting screw body (61), with end grooves (67) at both ends of the connecting screw body (61) and circumferential grooves (66) near both ends of the connecting screw body (61). The end grooves (67) are used to place end sealing rings (63), and the circumferential grooves (66) are used to place circumferential sealing rings (62).

8. The sample dispensing needle cleaning device as described in claim 1, characterized in that, The sample needle cleaning device (84) is provided with a plurality of second tubes (3), which are connected to each other to extend the cleaning channel (8), and each second tube (3) is provided with ultrasonic generating modules (2, 4, 45) at both ends.

9. The sample dispensing needle cleaning device as described in claim 1, characterized in that, The first tube (1) is provided with an inlet (13) and an overflow (12). The overflow (12) is closer to the port of the first tube (1) than the inlet (13). The end of the third tube (5) is provided with an outlet (52).

10. A sample dispensing needle cleaning system, characterized in that, The needle cleaning system includes a needle cleaning device (84) as described in any one of claims 1-7, a hydraulic pump (81), a cleaning fluid tank (82), a vacuum pump (83), and a waste fluid tank (86). The first tube (1) of the sample needle cleaning device (84) is connected to the cleaning liquid tank (82) through the hydraulic pump (81), and the third tube (5) is connected to the waste liquid tank (86) through the vacuum pump (83). The ultrasonic generating modules (2, 4) located in the second tube (3) are respectively connected to different ultrasonic excitation signals (23, 43).

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